Ⓒ80 A part is required to be machined to match the drawing illustred in figure 15 marks QB, Calculate the machining time for the shown aluminum cylindrical shaft if the following data are given: - - - - The wrought dimension of the received shaft is 90 mm in diameter and 240 mm in length. The rotation speed during roughing is 650 r.p.m The depth of cut for roughing operation for longitudinal and face cutting is 2.5 mm and the feed is 0.4 mm/rev. The rotational speed for finish operation is 850 r.p.m; the depth of cut for finish operation is 0.2 mm and the feed is 0.05 mm/rev. for longitudinal and face cutting. The rotational speed during drilling is 500 r.p.m and the average drilling feed is 0.4 mm/rev. 60 40 090 60 09:0 60 20 012 Ø20

Ⓒ80 A part is required to be machined to match the drawing illustred in figure 15 marks QB, Calculate the machining time for the shown aluminum cylindrical shaft if the following data are given: - - - - The wrought dimension of the received shaft is 90 mm in diameter and 240 mm in length. The rotation speed during roughing is 650 r.p.m The depth of cut for roughing operation for longitudinal and face cutting is 2.5 mm and the feed is 0.4 mm/rev. The rotational speed for finish operation is 850 r.p.m; the depth of cut for finish operation is 0.2 mm and the feed is 0.05 mm/rev. for longitudinal and face cutting. The rotational speed during drilling is 500 r.p.m and the average drilling feed is 0.4 mm/rev. 60 40 090 60 09:0 60 20 012 Ø20

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Machining Processes and Machine Tools

Machining is represented as the process in which an excessive amount of substance is eliminated from the particular element in the form of pieces. In machining, cutting tools such as rotary tools, lathe, drill press, grinder, chop saw, welders, and many more are applied to get the desired shape. As compared to other manufacturing processes, machining is precise and versatile.

Question

100%

B)
280
made for during pattern making why do we need to add feeders to the
casting? Make suitable assumptions for your answer
A part is required to be machined to match the drawing illustred in figure 15 marks
QB, Calculate the machining time for the shown aluminum cylindrical
shaft if the following data are given: -
-
-
-
The wrought dimension of the received shaft is 90 mm in
diameter and 240 mm in length.
The rotation speed during roughing is 650 r.p.m
The depth of cut for roughing operation for longitudinal and face
cutting is 2.5 mm and the feed is 0.4 mm/rev.
The rotational speed for finish operation is 850 r.p.m; the depth
of cut for finish operation is 0.2 mm and the feed is 0.05 mm/rev.
for longitudinal and face cutting. The rotational speed during
drilling is 500 r.p.m and the average drilling feed is 0.4 mm/rev.
60
40
Question (3) [40 Total marks]
Ⓒ50
60
09 0
60
20
SECTION B: ANSWER ONE QUESTION ONLY
The total marks for this section are [40 marks]
2
O

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A turning operation is performed on C1008 steel (a ductile steel) using a tool with a nose radius = 1.3 mm. Cutting speed = 61 m/min and feed = 0.27 mm/rev. Compute an estimate of the surface roughness in this operation. (Hint: the ratio of actual to ideal roughness can be read on the figure below) Equations used R₁ = f² 32NR Ra = rai Ri Actual Theoretical Ratio= 2.4 2.2 2.0 1.8 1.4 1.2 1.0 0 Ductile metals Cast irons Free machining alloys 100 I 30.5 200 Cutting speed-ft/min I 61 300 91.5 Cutting speed - m/min T 400 I 122