Gear Forming - Manufacturing Technology - Exam, Exams of Manufacturing Technologies

Download Gear Forming - Manufacturing Technology - Exam and more Exams Manufacturing Technologies in PDF only on Docsity! Page 1 of 4 CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Semester 2 Examinations 2010 Module Title: Manufacturing Technology Module Code: MECH7007 School: Mechanical & Process Engineering Programme Title: Bachelor of Engineering in Mechanical Engineering Bachelor of Engineering in Manufacturing Engineering Programme Code: EMECH_7_Y3 EMANF_7_Y3 External Examiner(s): Mr. A. Bateman Dr. E. Ahearne Internal Examiner(s): Mr J. Calvey Instructions: Answer Question 1 and 2 other questions. Duration: 2 Hours Sitting: Summer 2010 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. Page 2 of 4 Q1 – Compulsory (a) Produce a fully labeled diagram of Merchants Force circle explaining how each force is generated. . (4 Marks) (b) The following data was obtained from a cutting test: γ φ .d .f l1 l2 Fa Fv 20o 90o 5mm 0.25mm/rev 29mm 11mm 425N 995N 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) Explain what is meant by the term “Tool life”. (4 Marks) (d) The equation below is often used when analyzing the costs of cutting operations. Explain what each of the terms mean. (4 Marks) (e) List the advantages and disadvantages of centreless grinding. (4 Marks) Q2. (a) Compare and contrast the processes of Gear forming with Gear planning. (12 Marks) (b) The inspection of spur gears falls into TWO distinct areas of investigation. List and explain both. (8 Marks) (c) Calculate the gear tooth vernier settings to measure a 33 Tooth, 2.5mm module, 20o pressure angle spur gear for tooth thickness for (i) Pitch Line (4 Marks) (ii) Constant chord (4 Marks) (d) What is the advantage of the constant chord method over the Pitch line method of gear tooth thickness measurement. (4 Marks) n n J HT − = 1 60