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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – VI• EXAMINATION – SUMMER 2016
Subject Code: 3361902 Date: 11/05/2016
Subject Name: Tool Engineering
Time: 10:30 AM to 01:00 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. List four functions of Tool Engineer.
2. State four factors affecting Tooling Economy.
3. Write selection criteria of Cutting Tool material.
4. Why Tungsten & Cobalt are added in a tool material.
5. Define Location & Clamping.
6. Sketch Wedge clamp.
7. Write four selection criteria for Jig & Fixture.
8. Explain in brief Fool proofing.
9. Differentiate between Trimming & Shaving.
10. Write function of Stripper plate.
Q.2 (a) Explain steps of Process Planning. 04
OR
(a) Explain briefly principle of motion economy. 04
(b) Write types of Carbide inserts with its applications. 04
OR
(b) Differentiate between Ceramic cutting tool & Diamond tool. 04
(c) Sketch & state application of Nest Locator. 04
OR
(c) List principles for proper Location. 04
(d) Write the importance of Centre of Pressure. 02
OR
(d) Give four reason why clearance is necessary in cutting dies. 02
Q.3 (a) Write resharpening method for Drill point. 04
OR
(a) Explain tool holding system for Turning Carbide inserts. 04
(b) Calculate the bending force in KN for 450bend in 1.5 thick & 1200 mm long Aluminum piece. Take die opening as 8 times metal thickness & ultimate tensile strength, S = 450 N/mm2. 04
OR
(b) State advantages & limitations of Bulging Die. 04
(c) Explain with sketch Double Action Drawing Die. 06
OR
(c) Describe two main types of Forging. 06
Q.4 (a) Four holes of 6 mm diameter are to be drilled in object shown in Fig. 1 Select suitable Drill Jig, draw the assembly sketch of selected jig, and also draw the sketches of important components with dimensions. 09
OR
(a) Design a suitable fixture to mill 6 mm wide slot in the components shown in Fig 2. Sketch the assembly drawing of Fixture, and also draw the sketches of important components with dimensions. 09
(b) State different types of Jig bushes with sketches. 05
Q.5 (a) Select a suitable die-set for a component shown in fig. 3. Draw assembly of the Die-set you have selected.Also find Max % utilization showing scrapstrip layout & draw dimensional sketches of Punch & die. 10
(b) State the different types of Ejecting Devices with sketch. 04
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