Question: Determine the optimum cutting speed for an operation on a Lathe machineusing the following information:Tool change time:Tool regrinds time: 3 minMachine running cost Re.0.50 per minDepreciation of tool regrinds Rs. 5.0The constants in the tool life equation are 60 and 0.23 min

Given:-Tc=tool change time=3 minTr=tool regrinds time= 3 minCm= Machine running cost= Rs 0.50 per…

Question: Determine the optimum cutting speed for an operation on a Lathe machine using the following information: Tool change time: 3 min Tool regrinds time: 3 min Machine running cost Re.0.50 per min Depreciation of tool regrinds Rs. 5.0 The constants in the tool life equation are 60 and 0.2

Question: Determine the optimum cutting speed for an operation on a Lathe machine using the following information: Tool change time: 3 min Tool regrinds time: 3 min Machine running cost Re.0.50 per min Depreciation of tool regrinds Rs. 5.0 The constants in the tool life equation are 60 and 0.2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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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.

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21.39 Describe the effects that a dull tool can have on cutting operations.
In a machining operation, doubling the cutting speed reduces the tool life to 1/8th of the original value. What is the exponent n in Taylor's tool life equation VTn = C,
21.48 Let n = 0.5 and C = 400 in the Taylor equation for tool wear. W hat is the percent increase in tool life if the cutting speed is reduced by (a) 50% and (b) 75%?
In machining operation, if velocity doubled then the tool life reduced to 1/16 th of initial value. What is the Taylor's tool life index (n) for a machining operation?
A part to be turned in an engine lathe must have a surface finish of 1.6 μm. The part is made of a free machining aluminum alloy. Cutting speed = 150 m/min. The nose radius on the tool = 0.75 mm. Determine the feed that will achieve the specified surface finish.
(j) In a turning operation on stainless steel with hardness = 200 HB, the cutting speed = 250 m/min, feed = 0.3 mm/rev, and depth of cut = 8 mm. How much power will the lathe draw in performing this operation if its mechanical efficiency = 95%. Use Table below to obtain the appropriate specific energy value.
22.7 Why is toughness im portant for cutting-tool materials?
22.22 Why does temperature have such an important effect on tool life?
21.47 State whether or not the following statements are true, explaining your reasons: (a) For the same shear angle, there are two rake angles that give the same cutting ratio, (b) For the same depth of cut and rake angle, the type of cutting fluid used has no influence on chip thickness, (c) If the cut ting speed, shear angle, and rake angle are known, the chip velocity can be calculated, (d) The chip becomes thinner as the rake angle increases, (e) The function of a chip breaker is to decrease the curvature of the chip.
The following data is applicable for a turning operation. The length of job is 900 mm, diameter of job is 200 mm, feed rate is 0.25 mm/rev and optimum cutting speed is 300 m/min. The machining time (in min) is ___. A. 7.539 B. 7.90 C. 8.25 D. 9.00
22.31 Do you think that there is a relationship between the cost of a cutting tool and its hot hardness? Explain.
22.27 Why are chemical stability and inertness important in cutting tools?