(a) Find Depth of cut and Root diameter for M18 x 2.75 x 30 internal thread. (3 marks) (b) Mild steel work piece undergo

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A Find Depth Of Cut And Root Diameter For M18 X 2 75 X 30 Internal Thread 3 Marks B Mild Steel Work Piece Undergo 1 (310.88 KiB) Viewed 28 times

(a) Find Depth of cut and Root diameter for M18 x 2.75 x 30 internal thread. (3 marks) (b) Mild steel work piece undergoes a facing operation on a lathe machine to reduce the length from L=61 mm to L1 = 55.5 mm. (4 marks) Sl. No: 1 2 3 4 5 6 Machining and Design Parameter Cutting speed Feed Depth of cut Diameter of the work piece Time for single facing (Tsingle) Over run Find the following 16 m/minutes 0.3 mm/revolution 0.5 mm 22 mm 0.55 minute's 2.5 mm i) Find number of passes ("n") to reduce the length from L to L1 mm (1 mark) ii) Approach length of the tool. (2 mark) iii) Total time to reduce the length from L to L1 mm in minutes (Trinal) (1 mark)