Class Lectures - UCM

Introduction to jet machining

Water jet machining - overview

Start contributing articles ..new online magazine

Hi ,
It gives me great pleasure to present a link which to provide a platform for fundamental and advanced learning in Mechanical Engineering.
Do spend some time to visit and start contributing the articles , advancements, recent trends and any information about mechanical engineering.

The magazine : http://www.mechmag.blogspot.com/

Updated subject content in this site

Subject content in this blog

Kinematics of machinery

Applied hydraulics and pneumatics

Computer aided machine drawing practice

GD&T
machine vice
Welding symbols
Things to learn
Viva Questions

CAD / CAM lab
CAD /Cam lab

Principles of management

Engineering graphics
Part 1
Part 2

Unconventional machining process

ME- Design: Design for Manufacture,assembly and environments

UCM study materials for students

Dear students ,Once again I am happy to present you some of the materials for learning the subject "Unconventional Machining Process " [learnt by sixth semester Anna University students ]in addition to my regular class lecture. Do utilise these and give your feedback.

1. Syllabus
2. University question Paper
3. Two marks with answers
4. UCM QUESTION BANK - important questions
5. ECM Video
5. Laser cutting video
6. Lecture material
7. About Ultrasonic machining - Applications
8. Anna university question papers

9. Model question papers

10. Assignment topic

Syllabus for UCM ME 2026

ME2026 UNCONVENTIONAL MACHINING PROCESSES
(COMMON TO MECHANICAL AND PRODUCTION)
OBJECTIVE:
To learn about various unconventional machining processes, the various process
parameters and their influence on performance and their applications

UNIT I INTRODUCTION 5
Unconventional machining Process – Need – classification – Brief overview .

UNIT II MECHANICAL ENERGY BASED PROCESSES 10

Abrasive Jet Machining – Water Jet Machining – Abrasive Water Jet Machining - Ultrasonic Machining. (AJM, WJM, AWJM and USM). Working Principles – equipment used – Process parameters – MRR-Variation in techniques used – Applications.

UNIT III ELECTRICAL ENERGY BASED PROCESSES 8
Electric Discharge Machining (EDM)- working Principle-equipments-Process Parameters-Surface Finish and MRR- electrode / Tool – Power and control Circuits-Tool Wear – Dielectric – Flushing – Wire cut EDM – Applications.
UNIT IV CHEMICAL AND ELECTRO-CHEMICAL ENERGY BASED PROCESSES 12Chemical machining and Electro-Chemical machining (CHM and ECM)-Etchantsmaskant-
techniques of applying maskants-Process Parameters – Surface finish and MRR-Applications. Principles of ECM-equipments-Surface Roughness and MRRElectrical circuit-Process Parameters-ECG and ECH - Applications.
UNIT V THERMAL ENERGY BASED PROCESSES 10
Laser Beam machining and drilling (LBM), plasma arc machining (PAM) and Electron Beam Machining (EBM). Principles – Equipment –Types - Beam control techniques – Applications.

TOTAL: 45 PERIODS
TEXT BOOK:1. Vijay.K. Jain “Advanced Machining Processes” Allied Publishers Pvt. Ltd., New Delhi, 2007

REFERENCES:1. Benedict. G.F. “Nontraditional Manufacturing Processes” Marcel Dekker Inc., New York (1987).
2. Pandey P.C. and Shan H.S. “Modern Machining Processes” Tata McGraw-Hill, New Delhi (2007).
3. Mc Geough, “Advanced Methods of Machining” Chapman and Hall, London (1998).
4. Paul De Garmo, J.T.Black, and Ronald.A.Kohser, “Material and Processes in Manufacturing” Prentice Hall of India Pvt. Ltd., New Delhi ,8th Edition,2001.

Free GATE TEST available

As mentioned in my previous post,the site is upgraded with free tests . GATE 2010 aspirants can attempt and give their feed back. You need to register yourself before you attempt, registration is free . You would be given the anlayisis of the time you have taken to answer, your score,and you can find more other features. Enjoy learning...

Click here to go to the link

V Sem ME 1308 -things to learn

Computer aided machine drawing practice -Things to learn
In design data book(psg)
Welding symbols(pg.no 11.1,11.2)
1.fillet
2. square butt
3.double butt
4.Spot welding
5.representation of welding symbols
Bolt and nut(for sizes M10,M12,M16)(5.47,48,49)
Screw(5.51)
Stud(5.64)
V block for holding a circular job of diameter 83 mm(5.97)
Types of rivet for diameter of 10mm(5.26)
a.snap
b.pan
c.flat head
taper key &hub for a shaft diameter of 58-65 mm(5.21)
only assembled fv,tv,sv will be asked

Computer Aided Machine drawing Practice ME 1308 Viva questions

Computer Aided Machine drawing Practice ME 1308 Viva questions

1. What is the purpose of plummer block?
2. What is the purpose of layer command in autocad?
3. What is the purpose of coupling? What are the types?
4. How is the bolt specified? List some of the types of the threads.
5. What are the types of sectioning in the drawing?
6. What are the general guidelines to be followed during dimensioning?
7. What is the difference between first angle Projection and third angle projection?
8. Give symbols for welding on both sides ?
9. What is meant by GD & T ?
10. What are the differences between limits , fits and tolerances ?
11. What are the different methods of dimensioning ?
12. What is LISP ?
13. What is the difference between a window and crossing selection box?
14. What are some of the advantages of using blocks?
15. What is the difference between snap and osnap? When would you use snap?
16. What is polar?
17. What is the difference between redraw and regen?
18. What is the purpose of the command QTEXT ?
19. How can you draw isometric view drawings in 2D ?
20. Where is the explode command used?
21. What is xref ?
22. Exand the abbreviations BIS, ISO ?
23. What are the sizes of the sheets A4,A3,A2,A1 ?
24. How is the dimension style altered ?
25. How can a autocad drawing saved in jpeg or bmp format?

Glad news for you

Dear all,It is a great and proud occassion for me to present my beloved students the a website is created to enhance advanced learning.
For this a tie up is made with vriti , a leading online service provider for competetive exams. you can enrol yourself as a candidate for preparing any of the competetive exams sitting in your home.
Also you can have Model Papers ,Previous year Solved Paper Accelerate Score Predictor ,Unit Tests ,Question Bank ,Syllabus, Unit wise breakup of the Exam, Syllabus Meter ,Comparison with Toppers, Your historical assessment
Study Material ,Doubt clearing Sessions and so on

There are a set of free exams for you to get familiar about the product.
For more details you may vist the site by clicking below
If you have any queries do write to me through the comment link provided below the post
Site for prepartion for competetive exams

Resources available in this blog for ME1305 - Applied Hydraulics and Pneumatics

For the sake of convenience , I am here under giving the resources [ ppt,videos,animations, question papers etc ] posted in this blog for my beloved students.

Pneumatics - Basics

Sequential circuit

Simple pneumatic circuits

Air Brakes

Valves ,symbols for ciruits, Two marks and QB

Syllabus

Machine vice - Assembled view

This is posted for my dear students to facilitate the understanding of Assembled drawing of Machine vice

Know what is G D & T

Geometric dimensioning and tolerancing (GD&T) is a symbolic language used on engineering drawings and computer generated three-dimensional solid models for explicitly describing nominal geometry and its allowable variation

When GD&T is used, the geometric tolerances apply to the features - not the dimensions. Therefore when BASIC dimensions are used with geometric tolerances, several different dimensioning schemes may be used without changing the meaning of the drawing.
GD&T is such a precise language, it involves a great many symbols and terms. Here are some of the symbols that are involved in geometric dimensioning and tolerancing fundamentals with a short definition of each.
Geometric Characteristic Symbols - There are 14 geometric characteristic symbols used in GD&T. They are used to describe size, location, orientation, and form.

Sequential circutit - Pneumatics

Find the link provided below . Download it from rapidshare . double click the exe file available. It gives you a real time learning experience of sequential circuit.
You can learn how to draw a circuit, [ dedicated softwares are available for it] check a circuit and also animate the circuit.
Share your experience and give your feedback.

Draw Pneumatic circuit and animate

Pneumatic circuits animations

In this Post , you find the animation of simple pneumatic circuits.
You can find about Valves two way, three way valves, shuttle valves ,cylinders ,etc.
You can have the live experience of the working of the circuit. Enjoy the experience and do share your views with me.

1. Go to the animation page [ right click open in new window ]
2. Spring return - Single acting piston cylinder arrangement animation
3.Double acting cylinder arrangement – animation
4.Double acting reciprocating pump with limit switches
5.Double acting cylinder with Flow controlled valves
6.Pneumatic sequence circuit by using a sequence valve Click and hold the play button to see the animation

Air Brakes explained in detail

In this manual , I hope the reader will understand the functioning of Pneumatics brakes. I am sure that the diagrams presented in the manual will facilitate understanding and create interest in learning the circuit of brakes.
Do share your views , comments and feed back after going through the manual

Do follow the link provided Air brake manual

GATE 2010 SYLLABUS - MECHANICAL ENGINEERING

syllabus for GATE

ENGINEERING MATHEMATICS

Linear Algebra: Matrix algebra, Systems of linear equations, Eigen values and eigen vectors.

Calculus: Functions of single variable, Limit, continuity and differentiability, Mean value theorems, Evaluation of definite and improper integrals, Partial derivatives, Total derivative, Maxima and minima, Gradient, Divergence and Curl, Vector identities, Directional derivatives, Line, Surface and Volume integrals, Stokes, Gauss and Green’s theorems.

Differential equations: First order equations (linear and nonlinear), Higher order linear differential equations with constant coefficients, Cauchy’s and Euler’s equations, Initial and boundary value problems, Laplace transforms, Solutions of one dimensional heat and wave equations and Laplace equation.

Complex variables: Analytic functions, Cauchy’s integral theorem, Taylor and Laurent series. Probability and Statistics: Definitions of probability and sampling theorems, Conditional probability, Mean, median, mode and standard deviation, Random variables, Poisson, Normal and Binomial distributions.

Numerical Methods: Numerical solutions of linear and non-linear algebraic equations Integration by trapezoidal and Simpson’s rule, single and multi-step methods for differential equations.

APPLIED MECHANICS AND DESIGN

Engineering Mechanics: Free body diagrams and equilibrium; trusses and frames; virtual work; kinematics and dynamics of particles and of rigid bodies in plane motion, including impulse and momentum (linear and angular) and energy formulations; impact.

Strength of Materials: Stress and strain, stress-strain relationship and elastic constants, Mohr’s circle for plane stress and plane strain, thin cylinders; shear force and bending moment diagrams; bending and shear stresses; deflection of beams; torsion of circular shafts; Euler’s theory of columns; strain energy methods; thermal stresses.

Theory of Machines: Displacement, velocity and acceleration analysis of plane mechanisms; dynamic analysis of slider-crank mechanism; gear trains; flywheels.

Vibrations: Free and forced vibration of single degree of freedom systems; effect of damping; vibration isolation; resonance, critical speeds of shafts.

Design: Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; principles of the design of machine elements such as bolted, riveted and welded joints, shafts, spur gears, rolling and sliding contact bearings, brakes and clutches.

FLUID MECHANICS AND THERMAL SCIENCES

Fluid Mechanics: Fluid properties; fluid statics, manometry, buoyancy; control-volume analysis of mass, momentum and energy; fluid acceleration; differential equations of continuity and momentum; Bernoulli’s equation; viscous flow of incompressible fluids; boundary layer; elementary turbulent flow; flow through pipes, head losses in pipes, bends etc.

Heat-Transfer: Modes of heat transfer; one dimensional heat conduction, resistance concept, electrical analogy, unsteady heat conduction, fins; dimensionless parameters in free and forced convective heat transfer, various correlations for heat transfer in flow over flat plates and through pipes; thermal boundary layer; effect of turbulence; radiative heat transfer, black and grey surfaces, shape factors, network analysis; heat exchanger performance, LMTD and NTU methods.

Thermodynamics: Zeroth, First and Second laws of thermodynamics; thermodynamic system and processes; Carnot cycle. irreversibility and availability; behaviour of ideal and real gases, properties of pure substances, calculation of work and heat in ideal processes; analysis of thermodynamic cycles related to energy conversion.

Applications: Power Engineering: Steam Tables, Rankine, Brayton cycles with regeneration and reheat. I.C. Engines: air-standard Otto, Diesel cycles. Refrigeration and air-conditioning: Vapour refrigeration cycle, heat pumps, gas refrigeration, Reverse Brayton cycle; moist air: psychrometric chart, basic psychrometric processes. Turbomachinery: Pelton-wheel, Francis and Kaplan turbines — impulse and reaction principles, velocity diagrams.

MANUFACTURING AND INDUSTRIAL ENGINEERING
Engineering Materials: Structure and properties of engineering materials, heat treatment, stressstrain diagrams for engineering materials.

Metal Casting: Design of patterns, moulds and cores; solidification and cooling; riser and gating design, design considerations.

Forming: Plastic deformation and yield criteria; fundamentals of hot and cold working processes; load estimation for bulk (forging, rolling, extrusion, drawing) and sheet (shearing, deep drawing, bending) metal forming processes; principles of powder metallurgy.

Joining: Physics of welding, brazing and soldering; adhesive bonding; design considerations in welding.

Machining and Machine Tool Operations: Mechanics of machining, single and multi-point cutting tools, tool geometry and materials, tool life and wear; economics of machining; principles of non-traditional machining processes; principles of work holding, principles of design of jigs and fixtures

Metrology and Inspection: Limits, fits and tolerances; linear and angular measurements; comparators; gauge design; interferometry; form and finish measurement; alignment and testing methods; tolerance analysis in manufacturing and assembly.

Computer Integrated Manufacturing: Basic concepts of CAD/CAM and their integration tools.

Production Planning and Control: Forecasting models, aggregate production planning, scheduling, materials requirement planning.

Inventory Control: Deterministic and probabilistic models; safety stock inventory control systems.

Operations Research: Linear programming, simplex and duplex method, transportation, assignment, network flow models, simple queuing models, PERT and CPM.
Important Dates For Gate Examination
IMPORTANT DATES
Scorecard will be sent only to the qualified candidates. No information will be sent to candidates who are not qualified.
Commencement of Sale of information brochure and offline application forms , filling online application forms: Third week of September

Last date of issue of Information Brochure and Application forms
• by post from GATE Offices Second week of oct
• at bank counters Second week of oct
• at GATE office counters Few days in addition to the above

Last date for
• Online application form submission (website closure) Friday
• Receipt of completed Online/Offline Application Form at respective zonal GATE Office
Date of the examination Second Sunday of feb 2010
Announcement of results Second Sunday of march

cad cam lab drg-1

I am giving this drg for the students who need to practice autocad from their home.
Also this drg can be a reference for those who missed the practical class.

KINEMATICS OF MACHINERY- ME 2203

Unit - 1

You can find the content presented which I have shown in the class .

Click the link below which directs you to the website of sendspace where you can download the material.

Please give your valuable feedback about your understanding and usefulness of the material.

Unit-1 download here

Paper Evaluation - Principles of Management

I hope that the following post is useful for student who have written exams in the subject POM MG 1351.
This is the way how evaluation is done. Students are therefore advised to prepare the subject , and present this way.
Usually results are positively expected before second week of july. Students may share their opinion/ views / marks in the exam.

How is evaluation done.

ME1305 APPLIED HYDRAULICS AND PNEUMATICS RESOURCES

Some of the useful videos ,are found in the internet , in which the learners can get a better understanding about the pumps
Also Anna university's previous year question paper is given for download.
Users can view / download and give their feed back about the material.

Videos:

Valves

1. check valve


Gear Pump

Vane pump

Centrifugalpump 1

Centrifugalpump 2

Axial pump

Hydraulic symbols
You may click each of the parts A B C D and E to view the corresponding videos. I hope that this will give a better exposure about the hydraulic symbols and the circuits.
Part A
Part B

Part C
Part D
Part E

Pneumatic circuit

Fluid power and its applications:

Previous year question paper

Question bank with two marks and 16 marks

Two marks questions and answers download

APPLIED HYDRAULICS AND PNEUMATICS ME1305

ME1305 APPLIED HYDRAULICS AND PNEUMATICS
OBJECTIVE• To know the advantages and applications of Fluid Power Engineering and Power Transmission System.
• To learn the Applications of Fluid Power System in automation of Machine Tools and others Equipments.

1. FLUID POWER SYSTEMS AND FUNDAMENTALS 9
Introduction to fluid power, Advantages of fluid power, Application of fluid power system. Types of fluid power systems, Properties of hydraulic fluids – General types of fluids – Fluid power symbols.
Basics of Hydraulics-Applications of Pascals Law- Laminar and Turbulent flow – Reynold’s number – Darcy’s equation – Losses in pipe, valves and fittings.

2. HYDRAULIC SYSTEM & COMPONENTS 9
Sources of Hydraulic Power: Pumping theory – Pump classification – Gear pump, Vane Pump, piston pump, construction and working of pumps – pump performance – Variable displacement pumps.
Fluid Power Actuators: Linear hydraulic actuators – Types of hydraulic cylinders – Single acting, Double acting special cylinders like tanden, Rodless, Telescopic, Cushioning mechanism, Construction of double acting cylinder, Rotary actuators – Fluid motors, Gear, Vane and Piston motors.

3. DESIGN OF HYDRAULIC CIRCUITS 9
Construction of Control Components : Director control valve – 3/2 way valve – 4/2 way valve – Shuttle valve – check valve – pressure control valve – pressure reducing valve, sequence valve, Flow control valve – Fixed and adjustable, electrical control solenoid valves, Relays, ladder diagram.
Accumulators and Intensifiers : Types of accumulators – Accumulators circuits, sizing of accumulators, intensifier – Applications of Intensifier – Intensifier circuit.

4. PNEUMATIC SYSTEMS AND COMPONENTS 9
Pneumatic Components: Properties of air – Compressors – Filter, Regulator, Lubricator Unit – Air control valves, Quick exhaust valves, pneumatic actuators.
Fluid Power Circuit Design, Speed control circuits, synchronizing circuit, Penumo hydraulic circuit, Sequential circuit design for simple applications using cascade method.

5. DESIGN OF PNEUMATIC CIRCUITS 9
Servo systems – Hydro Mechanical servo systems, Electro hydraulic servo systems and proportional valves.

Fluidics – Introduction to fluidic devices, simple circuits, Introduction to Electro Hydraulic Pneumatic logic circuits, ladder diagrams, PLC applications in fluid power control. Fluid power circuits; failure and troubleshooting.
TOTAL : 45
TEXT BOOKS
1. Anthony Esposito, “Fluid Power with Applications”, Pearson Education 2000.
2. Majumdar S.R., “Oil Hydraulics”, Tata McGraw-Hill, 2000.

GDT - Geometric Dimensioning and Tolerancing

What Is GDT?
GDT is a symbolic language. It is used to specify the size, shape, form, orientation, and location of features on a part. And its defined by ASME Y14.5 standard. Features toleranced with GDT reflect the actual relationship between mating parts. Drawings with properly applied geometric tolerancing provide the best opportunity for uniform interpretation and cost-effective assembly. GDT was created to insure the proper assembly of mating parts, to improve quality, and to reduce cost. GDT is a design tool. Before designers can properly apply geometric tolerancing, they must carefully consider the fit and function of each feature of every part. GDT, in effect, serves as a checklist to remind the designers to consider all aspects of each feature. Properly applied geometric tolerancing insures that every part will assemble every time. Geometric tolerancing allows the designers to specify the maximum available tolerance and, consequently, design the most economical parts. GDT communicates design intent. This tolerancing scheme identifies all applicable datums, which are reference surfaces, and the features being controlled to these datums. A properly toleranced drawing is not only a picture that communicates the size and shape of the part, but it also tells a story that explains the tolerance relationships between features.

When GDT Is Used?
Many designers ask under what circumstances they should use GDT. Because GDT was designed to position size features, the simplest answer is, locate all size features with GDT controls. Designers should tolerance parts with GDT when Drawing delineation and interpretation need to be the same

1. Features are critical to function or interchangeability
2. It is important to stop scrapping perfectly good parts
3. It is important to reduce drawing changes
4. Automated equipment is used
5. Functional gaging is required
6. It is important to increase productivity
7. Companies want across-the-board savings

Welding symbols - explained for Drawing

The eight elements which may appear in a welding symbol are:- reference line, arrow, basic weld symbols, dimensions and other data, supplementary symbols, finish symbols, tail and specification and process or other reference. Let us discuss the one by one.
Reference Line: This is the basis of the welding symbol. All other elements are oriented with respect to this line. The arrow is affixed to one end and a tail, when necessary, is affixed to the other.
Arrow: This connects the reference line to one side of the joint in the case of groove, fillet, flange, and flash or upset welding symbols. This side of the joint is known as the arrow side of the joint. The opposite side is known as the other side of the joint. In the case of plug, slot, projection, and seam welding symbols, the arrow connects the reference line to the outer surface of one of the members of the joint at the center line of the weld. In this case the member to which the arrow points is the arrow side member: the other member is the other side member. In the case of bevel and J-groove weld symbols, a two-directional arrow pointing toward a member indicates that the member is to be chamfered.
Basic Weld Symbols: These designate the type of welding to be performed. The basic symbols which are shown in the table Basic Weld Symbols are placed approximately in the center of the reference line, either above or below it or on both sides of it as shown in above figure. Welds on the arrow side of the joint are shown by placing the weld symbols on the side of the reference line towards the reader (lower side). Welds on the other side of the joint are shown by placing the weld symbols on the side of the reference line away from the reader (upper side).



Supplementary Symbols: These convey additional information relative to the extent of the welding, where the welding is to be performed, and the contour of the weld bead. The “weld-all-around” and “field” symbols are placed at the end of the reference line at the base of the arrow as shown in first figure and the table Supplementary Weld Symbols.


Dimensions: These include the size, length, spacing, etc., of the weld or welds. The size of the weld is given to the left of the basic weld symbol and the length to the right. If the length is followed by a dash and another number, this number indicates the center-to-center spacing of intermittent welds. Other pertinent information such as groove angles, included angle of countersink for plug welds and the designation of the number of spot or projection welds are also located above or below the weld symbol. The number designating the number of spot or projection welds is always enclosed in parentheses.
Contour and Finish Symbols: The contour symbol is placed above or below the weld symbol. The finish symbol always appears above or below the contour symbol. The following finish symbols indicate the method, not the degrees of finish: C—chipping; G—grinding; M—machining; R—rolling; and H—hammering.
Tail: The tail which appears on the end of the reference line opposite to the arrow end is used when a specification, process, or other reference is made in the welding symbol. When no specification, process, or other reference is used with a welding symbol, the tail may be omitted.

ME 2257/ ME 1308 COMPUTER AIDED MACHINE DRG LAB Syllabus

ME 2257 COMPUTER AIDED MACHINE DRAWING LABORATORY

OBJECTIVE

i) To make the students understand and interpret drawings of machine components so as to prepare assembly drawings either manually and using standard CAD packages.
ii) To familiarize the students with Indian Standards on drawing practices and standard components.

DRAWING STANDARDS

Code of practice for Engineering Drawing, BIS specifications – Welding symbols, riveted joints, keys, fasteners – Reference to hand book for the selection of standard components like bolts, nuts, screws, keys etc.

2-D DRAWINGS
Limits, Fits – Tolerancing of individual dimensions- Specification of Fits- Manual Preparation of production drawings and reading of part and assembly drawings.

CAD PRACTICE (USING APPLICATION PACKAGES)
Drawing, Editing, Dimensioning, Plotting Commands, Layering Concepts, Hatching, Detailing, Assembly, basic principles of GD&T (geometric dimensioning & tolerancing)

ASSEMBLY DRAWING (MANUAL & USING APPLICATION PACKAGES)
Manual parts drawing and preparation of assembled views given part details for components followed by practicing the same using CAD packages.
Suggested Assemblies:
Shaft couplings – Plummer block – Screw jack- Lathe Tailstock – Universal Joint – Machine Vice – Stuffing box- safety Valves - Non-return valves- Connecting rod -Piston and crank shaft- Multi plate clutch- Preparation of Bill of materials and tolerance data sheet

Kinematics of Machinery - ME 2203

UNIT -1
In this unit you will be exposed to the topics like mechanism, links ,elements, kinematic pairs,degrees of freedom, inversion of mechanisms etc.

Pl follow the link given to download.



Readers are requested to go through the content provided ,and give their feed back using the post comment option below

Kinematics of Machinery ME1252

Kinematics is a branch of classical mechanics which describes the motion of objects without consideration of the causes leading to the motion. The other branch is dynamics, which studies the relationship between the motion of objects and its causes. Kinematics is not to be confused with kinetics, and to dynamics as used in modern day physics.
The simplest application of kinematics is for particle motion, translational or rotational. The next level of complexity is introduced by the introduction of rigid bodies, which are collections of particles having time invariant distances amongst themselves. Rigid bodies might undergo translation and rotation or a combination of both.
This is an initiative which I have meticulously consolidated to benefit my student and the learners of kinematics. Most of the content covers the syllabus III Semester Mechanical Engineering prescribed by Anna university .
Readers are also advised to update the vist and find the other links provided in this blog. They can also search using the keywords, by typing in the space provided in the top of this page.


1. Slider crank mechanism ppt : http://mechsuman.blogspot.com/2009/04/slider-and-crank-mechanism.html
2. Draw polygons - http://mechsuman.blogspot.com/2009/04/velocity-and-acceleration-polygons.html
3. Question bank :
http://mechsuman.blogspot.com/2009/02/kinematics-of-machines-question-bank.html
4. Clutch assembly
http://mechsuman.blogspot.com/2009/02/clutch-assembly.html
5. Simple test on belts
http://mechsuman.blogspot.com/2009/02/belts-test-your-knowledge.html
6. Practice questions: Topic -belts
http://mechsuman.blogspot.com/2009/02/belts-practice-questions.html
7. Formula for remembrance:
http://mechsuman.blogspot.com/2009/01/formulae-for-belts-contd-part-2.html
8. More formulae:
http://mechsuman.blogspot.com/2009/01/formulae-used-for-belts.html
9.Introduction to belts
http://mechsuman.blogspot.com/2009/01/kinematics-of-machines-belts.html
10.Kinematics question paper-sample
http://mechsuman.blogspot.com/2008/12/kinematics-of-machines-question-paper.html

11. Kinematic mechanisms - Four bar chain, scotch yoke, slide crank and Geneva mechanisms

12. Fundamentals of gears

Kinematics of machinery - Gears

I have meticulously consolidated the content about gears. The link to download the content is given below. Have a look about the content and share your comments and views.Enjoy learning.....

BASICS OF GEARS

Kinematic of machinery[ இயந்திர இயங்கியல்] - kom mechanisms

While browsing the internet I found these videos which are quite interesting and useful for learning the mechanisms.
The readers are requested to watch and comment about the collections and the content of this blog.

four bar chain

slider crank mechanism

scotch yoke mechanism

Geneva mechanism

Enthusiastic about the reader's response

I am happy that my blog is being viewed in around 28 countries in the globe of which few are listed.

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Keep updating your knowledge...
Happy blogging

Principles of Management MG1351

The following content is available in this blog, you can either search using the key word[ space provided in the top ],or click the link provided below. you can also expand the posts grouped in months.
POM MG1351

1. Question bank :
http://mechsuman.blogspot.com/2009/04/principles-of-management-pom-mg1351.html
2. lesson from peter drucker
http://mechsuman.blogspot.com/2009/02/management-lesson-from-peter-drucker.html
3. Subject content for POM
http://mechsuman.blogspot.com/2008/12/pom-unit-wise-explained.html
4. Case study : http://mechsuman.blogspot.com/2008/12/case-studies-part-iii.html
5. Case study part 2 http://mechsuman.blogspot.com/2008/12/case-studies-part-ii.html
6. Case study part 1 http://mechsuman.blogspot.com/2008/12/pom-case-studies.html

CAD/CAM lab ME 2309 syllabus and Viva

ME1356 CAD/CAM LAB

LIST OF EXPERIMENTS
A) COMPUTER AIDED DESIGN (CAD) 15
3D Part modeling – protrusion, cut, sweep, draft, loft, blend, rib
Editing – Move, Pattern, Mirror, Round, Chamfer
Assembly – creating assembly from parts – assembly constraints
Conversion of 3D solid model to 2D drawing - different views, sections, isometric view and dimensioning
Introduction to Surface Modeling
Introduction to File Import, Export – DXF, IGES, STL, STEP
3D modeling of machine elements like Flanged coupling, screw jack etc.

Note: Any one of the 3D MODELING softwares like Pro/E, IDEAS, CATIA, UNIGRAPHICS, AutoCAD to be used.

B) COMPUTER AIDED MANUFACTURING (CAM) 21
1. MANUAL PART PROGRAMMING (Using G and M Codes) in CNC lathe
1.1 Part programming for Linear and Circular interpolation, Chamfering and Grooving
1.2 Part programming using standard canned cycles for Turning, Facing, Taper turning and Thread cutting

2. MANUAL PART PROGRAMMING (using G and M codes) in CNC milling
2.1 Part programming for Linear and Circular interpolation and Contour motions.
2.2 Part programming involving canned cycles for Drilling, Peck drilling, and Boring.

C) SIMULATION AND NC CODE GENERATION 9
NC code generation using CAD / CAM softwares - Post processing for standard CNC Controls like FANUC, Hiedenhain etc.

I have made an attempt to list down few FAQs in viva for CAD/CAM lab.
You may follow the pattern and prepare well for the exams.ALL THE BEST

1. What is the difference between linear interpolation and circular interpolation?
2. What are G and M codes? Give examples
3. What is meant by incremental coding system
4. What is meant by absolute method of referring?
5. What is interpolation?
6. What advantage a CNC machine has over a conventional machine?
7. What is a CNC program?
8. What is a simulation? Why is it necessary?
9. What is a dry run?
10. What is part programming?
11. Explain canned cycle.
12. Why is mirroring necessary in programming?
13. What are the controls available in the CNC machine?
14. What are the advantages of using computer aided design?
15. List out some of the modeling software currently available?
16. What are the limitations of solidworks?
17. What are the requirements for installing the solidworks?
18. What is the purpose of hole wizard?
19. Differentiate cut and split.
20. What is meant by detailing?
21. What are the constraints available for assembly?
22. Explain the method of creating a part in solidworks.
23. Explain the parent-child relationship in modeling.
24. list the features that can be created in solidworks.
25. What is instant 3D modeling?

Principles of Management [ POM ] MG1351 question bank

click the link below to download the question bank for the subject "Principles of Management " as presribed by Anna University, Chennai

http://rapidshare.com/files/218408265/QUESTION_BANK.pdf

Slider and crank mechanism

In this power point presentation you will learn how to draw the velocity and acceleration polygons

http://rapidshare.com/files/218393446/AP.2_crank-slider-1.pps

Velocity and acceleration polygons

One of the dicy part in kinematics is drawing the velocity and acceleration polygons. I have made an attempt for the learners to understand it easier.
Do share your comments and let me know your view points.

Find the link below in which you can get an idea to draw about velocity and acceleration polygons for a four bar mechanism

http://rapidshare.com/files/218392029/AP.1_fourbar.pps

Research topics in Mechanical Engineering

When I was browsing the internet I found few of the topics, which are considered for research. Hope you may find it useful.

Robotics { Which is my focus }
Parallel manipulators
Water robots
Master and slave robots
Minibots
BEAM robotics
unmanned arial vehicles
medical surgical robots

Advanced Manufacturing Technology- Laser materials processing
- Precision machining and processing - especially using closed-loop methods
- Novel processes (ultrasonically-assisted rolling, superplastic forming, high efficiency grinding)
- Knowledge support system for manufacture
- Free-from micromachining
- Advanced machining technologies for next generation aerospace materials
- Advanced monitoring strategies for the manufacture of high integrity aero-engine components
- Novel processes (High efficiency grinding)
- Laser materials processing (Laser cleaning)
- Knowledge support system for manufacture
- Intelligent processing monitoring and control
- Design for manufcture (Fixturing optimisation)
- Flexible forming - sheet metals
- Incremental forming - bulk metals

Advanced Materials- Cold 'thermal spraying' for linings of plain bearings
- New nano-crystalline materials for gas-turbine blade insulation
- Grain refinement methods for aluminium alloys
- Economic growth of carbon nano-tubes with emphasis in hydrogen storage
- Manufacture and testing of novel interpenetrating metal matrix composites
- Reactive processing of titanium carbide - reinforced metal composites
- Light metal nanostructured alloys for hydrogen storage applications
- Transparent, rare earth doped, nano-glass-ceramics for active waveguide devices
- Infrared-transmitting glass optical fibres for medical applications such as laser surgery and diagnostics
- Development of nanostructured solar cells for long duration aircrafts
- New nanocomposite coatings for tribological applications
- Life improvement of nanostructured thermal barrier coatings for gas turbine
- Processing and characterisation of functional nanosized powders
- Carbon nanotube reinforced metal matrix composites
- Creation of novel inorganic 1-D nanostructures
- Finite Element modelling of the deformation behaviour of 'real' metal foams for use as energy absorbers in crash protection systems
- Development of transparent nano-glass-ceramics for optical fibres for sensors
- Towards robust, high optical quality infrared optical fibres for applications in laser power transmission for laser surgery, and welding, and medical diagnostics
- Development of a new fabrication method for making glassy integrated chips which use light as the transmission medium

Bioengineering- Transport mechanisms in intervertebral disc degeneration, therapy and regeneration
- Development of a biofidelic, frangible leg form for use in occupant and pedestrian impact safety tests
- Mechanisms of neck and brain injury in 'whiplash'
- Development of feedthrough junctions for implantable medical devices
- Optimal cannula design and placement in mechanical cardiac support
- Development of an implantable rotary blood pump for chronic heart failure
- Exclusion of red blood cells in couette flow
- Modelling compromised hearts in the laboratory
- Nanocomposites and nanostructures for tissue engineering
- Degradable composites and sterilization
- Effect of nanoparticulates on toxicity and biocompatibility
- Physical vapour deposition of modified bioactive coatings
- Functionalised surfaces and cell surface interactions
- Mathematical Modelling of cell motility and experimental studies
- Proteomics and biocompatibility of biomaterials

Human Factors
- Tools and methods for determination of mental workload and situation awareness
- Speech-controlled virtual environments
- Identification of tacit skills and knowledge
- Representation of material properties in virtual environments
- Situation awareness in an industrial context
- Empirical development of interaction design guidance
- 3D data visualization
- Interaction between risk factors for musculoskeletal disorders
- Ergonomic design of work tools and equipment
- Biomechanics of materials handling
- Digital human modelling for work(place) design
- Assessment of risk-taking behaviour in industrial work

Polymer Composite Materials- Structural performance of composite fan blades and guide vanes
- Long fibre composites with nano-scale reinforcements in a polymer matrix
- Recovery of carbon- and other reinforcement fibres from scrap composite components
- Bio-degradable composites for medical implant applications
- Analysis of resin infusion for large composite structures
- Finite element analysis of composite materials with statistical variations
- Automotive composite materials for pedestrian safety applications

Structural Integrity and Dynamics- Combined fretting, fatigue and wear computations for high performance mechanical transmissions
- Elastic-plastic notch-strain prediction methods extending 1D tests to triaxial stress contexts
- Elastic stability of heavily-loaded hollow shafts under combined loading with dynamic effects
- Coupled active controllers for active suspension, ABS and traction control in performance cars
- Modular active sealing in modern turbomachinery
- Dynamic behaviour of aeroengine ball bearings
- Structural integrity of high temperature welded structures
- Elastic-plastic and creep anisotropy of power plant structures
- Smart piezoelectric actuators for precision microsystems applications
- The dynamics of super-extended space tethered systems (space elevators)
- Failure prediction for superplastic forming of aeroengine materials
- Investigation into power losses in automotive transmissions (especially rear differential)
- Novel systems for offshore wind-generation using direct conversion to compressed-air and subsea storage of the compressed air
- Novel power-transmission mechanisms using magnetic fields oscillating at specific frequencies

Thermodynamics and Fluid Mechanics
- CFD studies of combustion processes in novel engine configurations
- Numerical prediction of lubricant distribution and heat-transfer in transmission systems
- Thermal management in advanced mild-hybrid diesel-electric vehicles
- Flow visualisation in the vicinity of working gears
- Thermal management of a solid state hydrogen store utilising the waste heat from a fuel cell
- Experimental and CFD projects in the area of aeroengine transmission systems
- Design of a novel static mixer
- Thermal management of advanced electric actuation systems for aircraft
- Turbulent skin-friction drag reduction using compliant viscoelastic coatings
- Turbulent flow control over an aircraft wing with surface plasma actuators
- CFD studies of periodic instabilities in a combustor
- Particulate dispersion in the environment
- Air-borne drug delivery for paediatric care
- Modelling flow of films liquid around obstructions

Management lesson from Peter Drucker

Pl follow the link given below . I am sure that you will enjoy reading about Peter Drucker who has contributed more to the modern management.

http://www.businessweek.com/magazine/content/05_48/b3961001.htm

Clutch Assembly

In these two figures you can find the actual clutch assembly and the schematic of the diaphragm clutch.

Kinematics of Machines Question bank

This is intended for the students who are currently persuing Third semester Mechanical Engineering [ Regulations 2008] [ students joined after 2008 ] as per Anna University curriculum.

http://www.scribd.com/doc/12359029/KOM-Question-Bank?secret_password=26ra9wzyt7xtwsnkokci

Belts - test your knowledge

Mini test in the topic " Belts " is provided. you may click the link View survey below the heading " belts - test your understanding " to attempt the test.

Belts practice questions

You can practice these question for better understanding about the topic.

formulae for belts contd.. [ part 2 ]

formulae used for belts

Belts --Weekly update

Belts

Highlights of the topic covered till 24.01.2009

1. Velocity ratio
2. Length of the belt : open belt drive, crossed belt drive
3. Ratio of tensions , flat belt, V belt , rope drive
4. Angle of lap should be in radians
5. value of Alpha varies for open and cross belt drive
6. Power transmitted = product of velocity and difference in tensions
7. centrifugal tension = mass X square of velocity of belt
8. Maximum tension = centrifugal tension + tight side tension
9. Conditions for maximum power
10. Initial tension
11. Derivation for length of belt for open and crossed belt drive
12. slip, creep , stresses in belts

Problems in finding the power transmitted
Steps:

1. Find out the tensions .T1.T2 ,Centrifugal tension ,Maximum tension
2. For finding these tensions you need to calculate the mass and velocity and the angle of lap
3. For finding the angle of lap you need to calculate the value of Alpha.
4. If mass is not given directly , find it out using the value of density and assume the length as 1m.



Refer the formulae chart and the assignment problems

Students are advised to submit the problems [ 1 to 10 ] before 30.01.2009 , [ 11

Kinematics of Machines - belts

In order to facilitate the students, who missed my class and the students who need to have a quick review of the topics discussed, this initiative is taken.

• Belts – an introduction, materials used for belts
• Type of belting- open, crossed, compound, quarter belt drive etc
• Application of belts , direction of rotation
• Velocity ratio
• Criteria for selection of belts
• Simple problems related to velocity ratio
• Angle of lap, tension in belts[ tight side tension and slack side tension ],velocity of the belt
• Co efficient of friction, ratio of tension , power transmitted
• Power transmitted with respect to open and cross belt drive for the same speed criteria
• Relation among these parameters, respective equations was discussed.
• Simple problems in belts


Also download the material which is uploaded in rapidshare, in which you can find the basics of belts and simple problems
The link :
http://rapidshare.com/files/185303690/belt.pdf

Mechanical Engineering: The Ever- Evolving—and Growing—Profession

by Avram Bar-Cohen

Three years have passed since an article called “Mechanical Engineering — The Ever-Evolving Profession” was published by Mechanical Engineering Online. As predicted, the mechanical engineering profession has indeed evolved since the article was published in August 2005. The marketplace, the profession, and the public at large have affirmed the critical role to be played by mechanical engineers in the 21st century.

In 2006, for instance, ME undergraduates supplanted electrical and computer engineering as the single largest group of engineering students in the United States. Mechanical engineering enrollment has increased by 25 percent since 1999, and in 2006 totaled approximately 80,288, 7 percent more than the electrical and computer engineering student population—the next largest group (Michael Gibbons, Databytes, Prism Magazine, January 2008). More than 16,000 ME undergraduate degrees were awarded in 2006.

In the annual U.S. News & World Report issue devoted to graduate engineering education, mechanical engineering was identified as the most popular engineering Ph.D. discipline and third among engineering master’s degrees. Moreover, the same issue quoted Edward Hensel, who heads the ME department at Rochester Institute of Technology, who said that “there’s a powerful pent-up demand in industry for mechanical engineers.” It also quoted Prof. Larry Silverberg, associate ME chair at North Carolina State University, who explained the relative abundance of research funding by noting that “… so many of the critical problems in the forefront now lie in the area of mechanical engineering.” (Thomas K. Grose, USN&WR, March 26, 2008).

Mechanical design and manufacturing, written off even by many MEs as hopelessly antiquated skill-sets, are playing a pivotal role in the development and commercialization of new products and systems in the U.S. Black & Decker’s powerful new family of cordless power tools was made possible by a Watertown, Mass., startup’s production ramp-up of novel lithium-ion batteries from a handful of units in late 2005 to millions per year in 2007. (Kevin Bullis, Technology Review, June 2008).

Mechanical gears—specifically, a hub-mounted epicyclic (planetary) gear system—underpin Pratt & Whitney’s recently introduced “game changing” Geared Turbo Fan jet engine, which dramatically reduces fuel consumption and noise. Low pressure-drop compact heat exchangers—yet another “classic” ME knowledge domain—are a key element in the high-efficiency Mercury 50 gas turbine manufactured by Solar Turbines. (Lee Langston, Mechanical Engineering, May 2008).

Against this background, the ASME-led Global Summit on the Future of Mechanical Engineering concluded that unique skills in system integration—across technologies and across time zones—will place mechanical engineers on the critical path for the development of a broad range of 21st-century products and systems (Harry Hutchinson, Mechanical Engineering, June 2008).

The recent sea-change in the perceptions of mechanical engineering validates and confirms our commitment to this profession. However, if the challenges posed by the reemergence of world-wide scarcity in energy, water, food, and shelter are to be met, along with the economic pressures confronting the U.S., the education of mechanical engineers and the structure of the ME profession in this country must be radically altered.

Nothing short of a concerted effort on the reprofessionalization of mechanical engineering, including transformative changes in engineering education at the undergraduate and graduate levels, in ASME’s interactions with the broader engineering community, and in the relationship between engineers and their employers will suffice.


Avram Bar-Cohen is Distinguished University Professor and chair of the Department of Mechanical Engineering at the University of Maryland.

Coutesy: http://memagazine.asme.org/

Viva for Engg practices lab-II

Part -II

1. How will you perform taper turning operation in the lathe?
2. How are air conditioners working?
3. What is a refrigerant?
4. What are the common refrigerants used?
5. Explain the functionality of centrifugal pumps.
6. What is a foundry?
7. What are patterns?
8. Explain Knurling operation on lathe.
9. What is smithy?
10. What is an impeller?
11. differentiate window air conditioning and centralized air conditioning
12. Differentiate facing and turning
13. What is a truss?
14. Explain feed and depth of cut with respect to lathe.
15. What is the name of the workholding device in the lathe , give its types.

Practical exam ......

- Each of the student need to perform 2 exercises for 100 marks
- The student has to go to Mech / civil lab and ECE or EEE lab
- first fifteen of the batch will go to the mech or civil lab which contains 15 exercises.
- civil lab means exercises in carpentry and plumbing ,mechanical lab contains lathe and welding . [ total exercises includes 15]
- After completion in the first 1.5 hours the student needs to go to the next lab which may be EEE or ECE [ Which contains 15 experiments] and the student needs to choose one.
- The weightage for each lab is 50 marks .
-For instance if the roll no. of the student in Batch -I is XX006 he falls under the first fifteen and need to go to mech/civil lab, for the first exercise after completion ,he need to go to the EEE /ECE lab.
- If the student roll no. is XX038 the first exercise is in EEE/ECE lab and the second exercise is in mech/civil lab.
-Students are therefore advised to come early to identify the batch and the lab
-Students without uniform /lab coat ,shoes will not be permitted for the exams
- observation and record need to be submitted during the examination
- viva voce has a proportionate weightage. hence advised to prepare for the same
[ refer my earlier posts for FAQs in viva ]
All the best my dear students...
Subramanian.N. ,Senior Lecturer