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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 2 Examinations 2010/
Module Title: Manufacturing Technology
Module Code: MECH 7007
School: Mechanical & Process Engineering
Programme Title: Bachelor of Engineering Mechanical Engineering Bachelor of Engineering Manufacturing Engineering
Programme Code: EMECH_7_Y3 / EMANF_7_Y3 / CR_EMECN_
External Examiner(s): Dr. E. Ahearne, Mr. M. McKeon
Internal Examiner(s): Mr James Calvey
Instructions: Answer Question 1 and 2 other questions.
Duration: 2 hrs
Sitting: Autumn 2011
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. (10 Marks)
(b) The following data was obtained from a cutting test:
γ Φ .d .f l 1 l 2 Fa Fv 18 o^90 o^ 6mm 0.27mm/rev 28mm 13mm 300N 1250N Use Merchants analysis to calculate: (i) The magnitude and direction of the resultant force (3 Marks) (ii) The shear plane angle (3 Marks) (iii) The friction force (3 Marks) (iv) The coefficient of friction (3 Marks)
(c) When turning diameter 19mm bar on an automatic lathe employing TC tools the value of n is 0.2 and of V 60 is 104m/min. At what speed should the spindle run to give a tool life of 6 hours? If a length of 50mm per component is machined and the feed used is 0.16mm/rev, what is the cutting time per piece and how many pieces can be produced between tool changes?
(12 Marks)
Q
(a) Calculate for a 36T gear of 5mm module and 20 degree pressure angle:- (i) Plug size (ii) Distance over plugs places in opposite spaces (iii) Distance over plugs spaced 10 teeth apart. (15 Marks)
(b) Describe in detail ONE of the following Gear Finishing process Gear Shaving Gear Grinding (10 Marks)
(c) With regard to metal working explain what is meant by the term “Superplasticity” (8Marks)
