Kathmandu University

Mechanical Engineering Department

Manufacturing Process III (MP III)

Year: IV Sem: I   Faculty: R.C. Poudel

Tutorial Assignment: (Module Three)

Finishing Processes

     1)      Why do surfaces machined by various machining processes require     Finishing –   Operations? 

2)      Briefly discuss about various types of abrasives used in surface finishing operations. 

3)      Describe vertical –axis – lapping machine.

 4)      What do you understand by the term lapping? Describe the structure of lap and different types of lapping motions. 

5)      Describe honing process with suitable diagrams. 

6)      Write down advantages and disadvantages of honing.

 7)      Write short notes on:

a) Super-finishing      b) Types of roughness

c) Polishing                d) Buffing

e) Tumbling                f) Pickling

8)          8) Discuss the role of cutting speed and tool selection in the surface properties of  machined parts.

9)      When turning a cylindrical work-piece two different tools are used. In one tool no nose radius is provided, the side cutting and the end cutting edge angles being 30 and 7 respectively. In the other tool a nose radius of 0.7 mm is provided. The feed used in both the cases is 0.125mm. Find out the maximum height of unevenness in the generated surfaces. 

10)   Differentiate between honing and lapping.