22251: Jigs, Fixtures and Gauges Tool & Die 5th Sem Syllabus for Diploma TNDTE M Scheme

Jigs, Fixtures and Gauges detail TNDTE Diploma syllabus for Mechanical Engineering (Tool & Die) (T&D), M scheme is extracted from TNDTE official website and presented for diploma students. The course code (22251), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other tool & die 5th sem syllabus for diploma m scheme tndte you can visit Tool & Die 5th Sem Syllabus for Diploma M Scheme TNDTE Subjects. The detail syllabus for jigs, fixtures and gauges is as follows.

Rationale:

In the present competitive environment, elimination of non productive time in the processes is essential to improve productivity. For improving the productivity in the engineering industries various types of production tools Viz., Jigs, Fixtures, Gauges etc., are employed wherever necessary /possible. Hence thorough knowledge on the principles, construction and working principle of various Jigs, Fixtures and gauges is absolutely essential.

Objectives:

• Identify the Difference between Jig & Fixtures
• Study the plane of movements
• Explain possible freedom of movement of job in a jig, fixtures
• Study locating of work piece in a jig, fixture
• To understand the construction of various types of Jigs and Fixtures
• Explain mounting of jig on a machine tool
• Explain mounting of fixtures on the machine tool
• Design jig and fixtures
• Design of plug and snap gauges

Detailed Content:

Unit I

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Unit II

Principles Of Location And Clamping

Principles of location – location point – types of locators – pins and studs – V block – cup and cone location points – adjustable locating points – special adjustable stops – location from finished holes in the work – Diamond pin locator – Cam operated ‘V’ locator -Quick action ‘V’ locator. Principles of clamping – types of clamps – lever clamp – hinged clamp – two way clamp – Swinging clamp – wedge clamp – eccentric clamping arrangement – Quick action clamp – Cam operated clamp -Quarter turn screw – Toggle clamp – Pneumatic and Hydraulic clamps – Washers- ‘C ‘ Washer – Spherical and flat Washers.

Unit III

Jig Bushings And Drill Jigs

Jig Bushings: Materials for Jig bushing – press fit bushings – Fixed renewable bushings – slip renewable bushings – liner bushings – screw bushings – miscellaneous type of drill bushings – bushing specifications.

Drill Jigs: Open drill jig – plate drill jig – template drill jig – channel drill jig – turn over drill jig – angle plate drill jig – closed box drill jig – leaf drill jig – Post jig – Pot jig – indexing drill jig – universal drill jig – design of template and leaf jigs.

Unit IV

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Unit V

Gauges

Introduction – limit gauges -Taylor’s principle of limit gauging – Application of limit gauges – gauge makers tolerance – allowance for gauge wear – material for limit gauge – three basic types of limit gauges – Disposition of gauge tolerance and wear allowance – plug gauge – snap gauge – ring gauge – thickness and length gauges -recess gauge – step gauge – position and receiver gauges – IS specifications for gauges – Design of plug and Snap gauges.

Text Books:

1. Donoldson.C and Others, “Tool Design”, Tata McGraw Hill, 1978
2. Kempster, “Introduction to Tool Design and Jigs and Fixtures”, ELBS

Reference Books:

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Model Question Paper 1

Max. Marks : 75

Time: 3 Hour

Part-A

Answerany fifteen questions 1×15=15

1. Define JIG?
2. Define fixture?
3. What is fool proofing?
4. What is DOF?
5. What is meant by locating?
6. What is the purpose of “V” locators?
7. Name any five clamps?
8. What is the purpose of pads fixed with clamp faces?
9. What are the materials used for JIG bushes?
10. What is the function of slip renewable bush?
11. Specify a JIG bush with neat sketch?
12. What are the types of drill JIGs?
13. Name any four fixtures?
14. What is tennon block?
15. In which fixture work horn is used?
16. What is the purpose of spatter grooves?
17. What is limit gauge?
18. What are the three basic types of limit gauges?
19. What are the materials used to manufacture the limit gauge?
20. Sketch a ring gauge neatly?

Part-B

Answerall the Questions 5×12=60

1. Explain 3-2-1 principle of location with neat sketch (8)
2. What are the common defect caused while design a JIG? (4)

(Or)

1. What are the principles of locating and clamping? (8)
2. Explain quick acting clamp with neat sketches (4)
1. Explain linear bush and slip renewable bush with neat sketches (6)
2. Explain indexing Jig with neat sketch (6)
1. Write short notes on (8)
1. Location of work piece with respect to Cutter position
2. Design features for turning fixtures
1. What are the design features for welding fixtures (4)
1. Explain in detail the design of Turning fixtures.( 12 marks)

(Or)

1. Sketch and explain (12 marks)
1. Broaching fixtures
2. Concept of modular tooling.
1. Write short notes on (8)
1. Taylor’s principle for gauge design
2. Sketch and explain a snap gauge
1. What are the IS specification for gauge? (4)

Model Question Paper – 2

Time: 3 Hour

Max. Marks : 75

Part-A

Answer any fifteen questions 1×15=15

1. What is the main difference between a Jig and a Fixture?
2. What is degree of freedom?
3. Name the elements of a Jig.
4. Why jig or fixture is used in mass production?
5. Name the types of locators used in jig design.
6. What is quick acting clamp?
7. What is redundant location?
8. When adjustable locators are used?
9. Why jig bushes are used?
10. What is the type of fit between Jig bush and Jig plate?
11. How a jig bush is specified?
12. When liner bushes are used
13. What is tennon?
14. What is the use of cutter setter in milling fixtures?
15. When mandrels are used?
16. Why turning fixtures are balanced?
17. What is the advantage of using limit gauges.
18. How limit gauges are classified?
19. What is wear allowance
20. What is MMC?

Part – B

Answer all the Questions 5×12=60

1. Explain the advantages of jigs and fixtures (6)
2. Explain the concept of fool proofing with a sketch (6)

(Or)

1. Explain in detail the general design principles adopted in jig design. (12)
1. Sketch and explain quick action ‘V’ Locator(6)
2. Sketch and explain cam operated clamp (6)

(Or)

1. Sketch and explain (12)
1. Toggle clamp.
2. Quarter turn screw
1. Explain the various materials used for jig bushes (6)
2. Sketch and explain turn over drill jig. (6)

(Or)

1. Sketch and working of explain the construction of Indexing drill jig (12)
1. What are the factors to be considered in designing a milling fixture (6)
2. Explain the concept of modular tooling (6)

(Or)

1. Sketch and explain a welding fixture. (12)
1. Explain the Taylors principle of gauging (6)
2. Sketch and explain Plug gauge and snap gauge (6)

(Or)

1. Explain (12)
1. Position and receiver gauge
2. Ring gauge.

For detail syllabus of all other subjects of BE Tool & Die, M scheme do visit Tool & Die 5th Sem syllabus for M scheme.

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