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DIPLOMA ENGINEERING – SEMESTER –VI • EXAMINATION – WINTER 2015
Subject Code: 3361902 Date: 21/12/2015
Subject Name: Tool engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. Define tool.
2. State advantages of screw clamp.
3. Give definition of punching.
4. Define centre of pressure.
5. What is Jig?
6. Define location system?
7. What is fixture?
8. State work of punch.
9. What is spring back?
10. State chemical composition of satellite.
Q.2 (a) State main reasons for heat treatment to tool material 03
OR
(a) Explain tool holders for turning and milling carbide inserts type ISO designation. 03
(b) State application and limitations of coining Die. 03
OR
(b) Explain plastic injection. 03
(c) State functions and importance to enhance productivity and quality. 04
OR
(c) State function s of process planning. 04
(d) Explain tool steel alloys and their effects. 04
OR
(d) State characteristics of ceramic tool materials. 04
Q.3 (a) State three difference between Jig and Fixture. 03
OR
(a) List steps to design jigs & fixtures. 03
(b) Give classification of press tool based on operation. 03
OR
(b) State reasons to keep clearance between die and punch. 03
(c) Describe any one fixture with neat sketch. 04
OR
(c) Describe any one jig with neat sketch. 04
(d) Draw figure of wedge clamp and power clamp. 04
OR
(d) Draw any two figures of locators and state its uses. 04
Q.4 (a) Explain single action die. 03
OR
(a) Explain - Curling die. 03
(b) Explain V-bending. 04
OR
(b) Differentiate between blanking and punching. 04
(c) Design a suitable jig to drill holes of 8 mm. diameter for the component shown in Fig.:01. 07
Q.5 (a) Draw neat sketch of press tool and label main parts. 04
(b) Explain ejecting. 04
(c) List properties desired in tool materials. 03
(d) Carbon contain and application of High carbon steel. 03
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