Physics High School

You are the process engineer at Corvallis Automobiles Inc., and you have received an order to turn a cylindrical bar on an engine lathe to the dimensions specified in Fig. 1. For this order you will use cylindrical bar stock that is 48-inches long and 4-inches in diameter. The 48-inch length bar will be chucked in the lathe and supported at the opposite end using a live center. You are planning to complete the operation in one pass using a cutting speed of 400 ft./min. and a feed of 0.010 in./rev. Determine the following: a) The required depth of cut (in inches) b) The material removal rate (in cubic inches per minute)
c) The time required to complete the cutting pass (in minutes)

Answers

Answer 1

a.  the depth of cut  is 0.625 inches.

b. the material removal rate is 0.003125 cubic inches per minute.

c. the time required to complete the cutting pass is 20 minutes.

How do we calculate?

a) The required depth of cut can be determined by :

DOC = (4 in - 2.75 in)/2 = 0.625 in

Therefore, the depth of cut is  0.625 inches.

b) The material removal rate can be found by applying:

MRR = DOC x Width of cut x Feed rate

assuming we are using a standard carbide insert tool with a width of cut of 0.5 inches.

MRR = 0.625 in x 0.5 in x 0.010 in/rev = 0.003125 cubic inches per minute

c) The time required to complete the cutting pass is determined by:

Time = Length of cut / (Cutting speed x Width of cut x Feed rate)

Time = 48 in / (400 ft/min x (0.5 in) x (0.010 in/rev) x (1/12 ft/in)) = 20 minutes

Learn more about material removal rate  at: https://brainly.com/question/13106351

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