Solved Important Questions

SOLVED QUESTIONS

1. Classify sheet metal operations.

Refer chapter 4.1.1 in Page 4.2.

2. Write a note on sheet metal characteristics.

or

Explain the various properties of sheet metal.

Refer chapter 4.2 in Page 4.3.

3. Write short notes on shearing process.

Refer chapter 4.3 in Page 4.5.

4. Enumerate with neat sketches three phases in shearing.

Refer chapter 4.3.1 in Page 4.6.

5. Distinguish between blanking and punching operations. Sketch and explain the elastic - phase, plastic phase and fracture phase that take place in a blanking operation.

Refer Page 4.8.

6. Write short notes on forming operations.

Refer chapter 4.4.2 in Page 4.11.

7. In detail explain the coining and embossing process..

Refer Page 4.12 for embossing and Page 4.11 for coining processes.

8. Describe the nibbling and notching operations.

Refer Page 4.13 for nibbling and Page 4.9 for notching.

9. Explain with a neat sketch the working of shearing dies.

Refer chapter 4.5 in Page 4.13.

10. Briefly explain what are compound dies and progressive dies, with suitable sketches. 

Refer chapter 4.5.3 in Page 4.15 for compound dies and chapter 4.5.2 in Page 4.14 for progressive dies.

11. Explain the advantages and limitations of compound dies over progressive dies.

Refer Pages 4.16 & 4.17.

12. Compare progressive die and compound die.

Refer Page 4.17.

13. Describe the working of combination die with its neat sketch.

Refer chapter 4.5.4 in Page 4.17.

14. Write short notes on clearance on punch and die.

Refer chapter 4.5.4 in Page 4.17.

15. Compare combination die and compound die.

Refer Page 4.18.

16. Explain the different types of bending operations.

Refer chapter 4.7.1 in Page 4.23.

17. Explain the basic nomenclature of tube bending with a simple sketch.

Refer Page 4.26.

18. Sketch and explain the following sheet metal bending operations:

(i) Sheet bending using V-die.

Refer Page 4.23.

(ii) Bending edge of a sheet using wiping-die.

Refer Page 4.25.

(iii) Roll bending.

Refer Page 4.2.

(iv) Bending a sheet to a round shape using four-slide machine.

Refer Page 4.26 & 4.27.

19. Describe with illustrative sketches, the following sheet metal operations:

(i) Bending edge of a sheet using wiping-die.

Refer Page 4.25.

(ii) Roll bending.

Refer Page 4.2.

(iii) Stretch forming.

Refer chapter 4.11 in Page 4.33.

(iv) Deep drawing.

Refer Page 4.29.

20. Write short notes on the following:

(i) Shearing

Refer chapter 4.4.1 in Page 4.7.

(ii) Blanking

Refer Page 4.8.

(iii) Clearance in shearing

Refer chapter 4.5.4 in Page 4.17.

(iv) Springback in bending.

Refer chapter 4.7.2 in Page 4.28.

21. With an application examples, explain the deep drawing operation.

Refer Page 4.29.

22. Explain any one stretch forming method.

Refer chapter 4.11.1 in Page 4.33.

23. Enumerate with a neat sketch any two types of stretch forming operations.

Refer chapter 4.11.1 in Page 4.33.

24. Write a note on the characteristics and formability of sheet metals.

Refer chapter 4.12 in Page 4.36.

25. Write short notes on formability tests for elastic-plastic deformation.

Refer chapter 4.12 in Page 4.36.

26. Describe forming limit diagram.

Refer chapter 4.13.3 in Page 4.40.

27. Explain the various sheet metal forming processes with its important characteristics.

Refer chapter 4.4.2 in Page 4.11.

28. Explain the hydro forming process with neat sketches. Make a brief comparison of this process with conventional deep drawing.

Refer chapter 4.14.1 in Page 4.42.

29. With a neat sketch, explain the rubber pad forming process. How does it differ from rubber hydro forming process? 

Refer chapter 4.14.2 in Page 4.44.

30. Discuss with a neat sketch, the working of metal spinning process.

Refer chapter 4.14.4 in Page 4.47.

31. Explain the power spinning process with a neat sketch. Give their applications..

Refer Page 4.48.

32. With a neat diagram, explain the principle of explosive forming..

Refer chapter 4.14.5 in Page 4.49.

33. Sketch and explain the following explosive forming methods:

(a) Confined system

(b) Unconfined system.

Refer Page 4.49 & 4.50.

34. Elucidate process variables in explosive forming.

Refer Page 4.51.

35. Explain with a neat sketch the principle and operation of magnetic pulse forming. 

Refer chapter 4.14.6 in Page 4.52.

36. Explain peen forming process with a neat sketch.

Refer chapter 4.14.7 in Page 4.54.

37. How curvatures are made on thin sheet metals, explain the suitable process with neat sketch.

Refer chapter 4.14.7 in Page 4.54.

38. What is superplastic forming? Explain with a neat sketch.

Refer chapter 4.14.8 in Page 4.55.

39. Write short notes on:

(i) Hydroforming

Refer chapter 4.14.1 in Page 4.42.

(ii) Magnetic pulse forming

Refer chapter 4.14.6 in Page 4.52.

(iii) Superplastic forming.

Refer chapter 4.14.8 in Page 4.55.

40. What is micro forming of sheet metals? Give its applications.

Refer chapter 4.14.9 in Page 4.57.

41. Give brief descriptions of various characteristics that the sheet metals should have.

Refer chapter 4.15 in Page 4.58.

42. What is press working? How the presses are classified based on various criteria? 

Refer chapter 4.16 in Page 4.59 for press working and chapter 4.16.2 in Page 4.60 for classification of presses.

43. Explain with neat sketches the construction and working of any two types of presses.

Refer chapter 4.16.3 and 4.16.4 in Page 4.61.