Cork Institute of Technology
Bachelor of Engineering (Honours) in Mechanical
Engineering - Stage 2
(NFQ – Level 8)
Autumn 2007
Manufacturing Engineering
(Time: 3 Hours)
Answer FIVE Questions Examiners: Prof M. Gilchrist
Attempt FOUR Questions from Section A Mr. P. Clarke
and ONE Question from Section B Mr. M. Cotterell
Use separate answer book for each Section. . Mr. J. Twohig
Section A
1. An orthogonal cutting test yielded the following data:
Cutting Force Fc = 1400 N
Feed Force Ff = 1000 N
Uncut chip thickness to = 0.100mm
Chip thickness tc = 0.350mm
Tool Rake Angle γ = 10˚
Width of cut b = 5mm
From this data, construct Merchants circle and determine:
(i) Shear angle φ
(ii) Shear plane force components: Fs and Fn
(iii) Apparent shear strength of the material τs
(iv) Rake face force components: F and N
(v) Coefficient of friction on the rake face µ.
(20 marks)
2. Write technical accounts on any TWO of the following topics:
(i) Maximum Material Condition in Geometric Tolerancing
(ii) Classification of Chip Formation in Machining Processes
(iii) Cutting Tool Materials (20 Marks)
