4- Explain why continuous chips are not necessarily desirable. 5- List the factors that contribute to poor surface finish in cutting. 6- Tool life can be almost infinite at low cutting speeds. Would you then recommend that all machining be done at low speeds? Explain

4- Explain why continuous chips are not necessarily desirable. 5- List the factors that contribute to poor surface finish in cutting. 6- Tool life can be almost infinite at low cutting speeds. Would you then recommend that all machining be done at low speeds? Explain

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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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

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4- Explain why continuous chips are not necessarily desirable.
5- List the factors that contribute to poor surface finish in cutting.
6- Tool life can be almost infinite at low cutting speeds. Would you then
recommend that all machining be done at low speeds? Explain
7- The cutting force inereases with the depth of cut and decreasing rake angle.
Explain why.
8- Explain the segregation in casting of alloys.

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Discuss the effects of cutting speed, feed rate, and depth of cut on the tool wear rate during a turning operation. How does each parameter influence the surface finish of the workpiece? Provide a detailed explanation based on the principles of metal cutting mechanics.
2 1.23 Tool life can be almost infinite at low cutting speeds.Would you then recommend that all machining be done at low speeds? Explain.
a) It has been stated that it is generally undesirable to allow temperatures to riseexcessively in machining operations. Explain why?b) List out the cutting parameters which is influenced the rises of cuttingtemperature during turning process.c) Evaluate the relationship of these cutting parameters to the cutting temperaturewith graph.d) Propose the solution of how to reduce the temperature during the cuttingprocess.
A student is using a lathe with 80-hp and 80% efficiency to fabricate a copper alloy with Sy = 1200ksi If the width of cut is 0.30 inand the student set a rake angle of 0and a cutting speed of 200fl / min while she assumed a coefficient of friction to be 0.5. What is the maximum depth of cut the student can achieve?
a rod is to be manufactured using turning operations and is made of Nickel alloy. The rod is 80 mm in length and 15 mm in diameter. The final required diameter is 10 mm and the spindle rotates at N = 500 rpm while the tool axial speed is 100 mm/ min. Calculate material removal rate, cutting speed, cutting time, the power dissipated, and cutting force.
A student is using a lathe with 80-hp and 80% efficiency to fabricate a copper alloy with Sy= 1200 ksi. If the width of cut is 0.30 in. and the student set a rake angle of 0° and a cutting speed of 200 ft/ min while she assumed a coefficient of friction to be 0.5. What is the maximum depth of cut the student can achieve?
For the following application, identify one or more nontraditional machining processes that might be used, and present arguments to support your selection. Assume that either the part geometry or the work material (or both) preclude the use of conventional machining. The application is a matrix of 0.1 mm (0.004 in) diameter holes in a plate of 3.2 mm (0.125 in) thick hardened tool steel. The matrix is rectangular, 75 by 125 mm (3.0 by 5.0 in) with the separation between holes in each direction = 1.6 mm ( 0.0625 in).
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A flat milling operation will be carried out with a horizontal milling machine, in a piece of 250 mm in length and 50 mm in width, using a felicoidal bur with a diameter of 75 mm, with 10 teeth. If the feed per tooth is 0.2mm, and the cutting speed is 0.75 m / s, how would you determine the speed of metal removal to remove 6 mm from the surface of this piece?
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