6) It has been stated that it is generally undesirable to allow temperatures to rise excessively in machining operations. Explain why. 7) Explain the possible disadvantages of a machining operation if a discontinuous chip is produced. 8) List and explain the factors that contribute to poor surface finish in machining operations 9) Given your understanding of the basic machining process, describe the important physical and chemical properties of a cutting tool.

6) It has been stated that it is generally undesirable to allow temperatures to rise excessively in machining operations. Explain why. 7) Explain the possible disadvantages of a machining operation if a discontinuous chip is produced. 8) List and explain the factors that contribute to poor surface finish in machining operations 9) Given your understanding of the basic machining process, describe the important physical and chemical properties of a cutting tool.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

6) It has been stated that it is generally undesirable to allow temperatures to rise
excessively in machining operations. Explain why.
7) Explain the possible disadvantages of a machining operation if a discontinuous
chip is produced.
8) List and explain the factors that contribute to poor surface finish in machining
operations
9) Given your understanding of the basic machining process, describe the important
physical and chemical properties of a cutting tool.

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A turning operation is carried out on aluminum. Based on the specific energy values in the table in your text, determine material removal rate and cutting power in the operation under the following sets of conditions: (a) Cutting speed = 5.6 m/s, feed = 0.25 mm/rev, and depth of cut = 2.0 mm; and (b) cutting speed = 1.3 m/s, feed = 0.75 mm/rev, and depth of cut = 4.0 mm.
In an orthogonal cutting test, the cutting force and thrust force were observed to be 1000N and 500 N respectively. If the rake angle of tool is zero, What is the coefficient of friction in chip-tool interface ?
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This Question is from Metal and Machine Tools. Due Today Please Answer !!
What is surface roughness? Surface finish is one of the most important measures for determining the quality of products in machining. Explain in some details.
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Title It has been stated that it is generally undesirable to allow temperatures to rise excessively in... Description It has been stated that it is generally undesirable to allow temperatures to rise excessively in machining operations. Explain why. By the student. This is an open-ended problem with a large number of acceptable answers. The consequences of allowing temperatures to rise to high levels in cutting include: (a) Tool wear will be accelerated due to high temperatures. (b) High temperatures will cause dimensional changes in the workpiece, thus reducing dimensional accuracy. (c) Excessively high temperatures in the cutting zone may induce metallurgical changes and cause thermal damage to the machined surface, thus affecting surface integrity.
Problem 2. (Determining Cutting Speeds in Machining Economics) A turning operation is performed with HSS tooling on mild steel, with Taylor tool life parameters n = 0.12, C = 60 m/min. Work part length = 450 mm and diameter = 80 mm. Feed = 0.20 mm/rev. Handling time per piece = 4.0 min, and tool change time = 1.5 min. Cost of machine and operator = $27/hr, and tooling cost = $2 per cutting edge. Find the a. cutting speed for maximum production rate and b. cutting speed for minimum cost Problem 3. (Production Rate and Cost in Machining Economics) For the two cutting speeds computed in problem 2, determine: the hourly production rate and a. b. the cost per piece.