Download Metal Cutting Process - Manufacturing Engineering - Exam and more Exams Manufacturing Systems Design in PDF only on Docsity!
CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 1 Examinations 2008/
Module Title: Manufacturing Engineering & Quality Systems
Module Code: MANU 6012
School: Mechanical & Process Engineering
Programme Title: Bachelor of Engineering in Mechanical Engineering – Year 2 Bachelor of Engineering in Biomedical Engineering – Year 2
Programme Code: EMECH_7_Y EBIME_7_Y
External Examiner(s): Mr. Alan Bateman, Dr. Patrick Delassus
Internal Examiner(s): Mr R. Kennedy
Instructions: Attempt four questions only.
Duration: 2 hrs
Sitting: Winter 2008
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.
1. With the aid of neat detailed diagrams, describe the investment casting process including the production of the pattern and list any precautions, which should be considered in regard to the pattern. (18 marks) List at least five important advantages of the investment casting process. (7 marks) 2. (a) Name five unrelated methods by which part may be joined. (7½ marks)
(b) Write notes on advantages and disadvantages of using adhesives as a joining process. (5½ marks)
(c) In the metal cutting process, there are three fundamental types of chip produced. Name and describe them. (6 marks)
(d) State three factors, which govern the cutting speed when machining metal on a lathe. (6 marks)
3. (a) Explain what is meant by selective assembly. In what way does selective assembly reduce the cost of manufacture? (8 marks)
(b) Use diagrams to illustrate each of the following: - i. a clearance fit ii. a transition fit iii. an interference fit (6 marks)
(c) A fit is given as 50mm dia H7/k6. Explain what this designation means. State the class of fit and determine the actual limits of size from Table 1-11. (6 marks) (d) Describe Taylors principle of gauging. (5 marks)
4. Fig 1 shows an exercise which is to be milled on the C.N.C. machine. The following operations must be carried out including drilling, slotting as well as a circular slot which is to be milled in a clockwise direction and the cutter is to traverse around the perimeter of the work as indicated. Complete the following: -
i. Complete the table by indicating the values for the numbered positions on the diagram
shown on Fig 1b with reference to x and y and to the origin. (3 marks)
ii. Prepare a programme, which can be fed into the machine to execute the work. (17 marks) iii. Indicate using diagrams how the T.L.O. is arrived as for each tool and stored in the memory. (5 marks)
