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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 2 Examinations 2008/
Module Title: Manufacturing Technology
Module Code: MECH 7007
School: Mechanical & Process Engineering
Programme Title: Bachelor of Engineering in Mechanical Engineering – Award Bachelor of Engineering in Manufacturing Engineering – Award
Programme Code: EMECH_7_Y EMANF_7_Y
External Examiner(s): Mr A Bateman, Dr P Delassus
Internal Examiner(s): Mr J Calvey Mr P Curtin
Instructions: Answer Question 1 and 2 other questions.
Duration: 2 Hours
Sitting: Summer 2009
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.
Q1 – Compulsory (a) State Taylors tool life equation and define each of the terms. (4 Marks)
(b) The following data was obtained from a cutting test: γ φ .d^ .f^ l^1 l^2 Fa Fv 19 o^90 o^ 4mm 0.25mm/rev 30.5mm 12.5mm 430N 1000N
Use Merchants analysis to calculate: (i) The magnitude and direction of the resultant force (5 Marks) (ii) The shear plane angle (5 Marks) (iii) The friction force (5 Marks) (iv) The coefficient of friction (5 Marks)
(c) List the advantages and disadvantages of external centerless grinding. (4 Marks) (d) Name FOUR cutting tool materials used in Industry today and list one typical application for each. (4 Marks) (e) List and explain FOUR outcomes achieved by Honing (4 Marks)
- (a) Define the following Gear Terms: (12 Marks) Module Pitch Circle Pressure Angle Rack
Write a note on one of the following: (8 Marks) Gear Planning Gear Shaping Gear Shaving
- (a) List FIVE advantages and/or disadvantages of thread rolling. (8 Marks )
(b) Briefly describe ONE method of Thread grinding. ( 8 Marks )
(c) A special fine thread has a nominal outside diameter of 4 inches. The pitch is 0.25in and the threads are of Whitworth Form. The thread is acceptable if the effective diameter is between nominal size and minus 0.008 in. When checked with wires of diameter 0.15in the dimensions over wires was 4.070 in. If the flank angle and pitch are correct, calculate the effective diameter and hence state whether the thread is acceptable. (Note Height of fundamental triangle for Whitworth H= 0.9605P). (12 Marks)
(d) When measuring the effective diameter of a thread, explain what is meant by the term “Best Wire”.? (4 Marks)
