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A 40cm diameter workbar that is 80cm long is to be turned down to a diameter of 35cm on an engine lathe. Cutting conditions are the following: cutting speed = 90m/min, feed = 0.35mm/rev. Are required two rough operations. The bar will be held in a chuck and supported on the opposite end in a live centre. With this workholding setup, one end must be turned to diameter; then the bar must be reversed to turn the other end. Using an overhead crane available at the lathe, the time to reverse the bar is 3.0 minutes. Loading and unloading operations (at the beginning and at the end of the manufacturing process) take a total of 5 minutes. For each turning cut an allowance must be added to the cut length for approach and overtravel. The total allowance (approach plus overtravel) = 15mm. Determine the total cycle time to complete this turning operation

A 40cm diameter workbar that is 80cm long is to be turned down to a diameter of 35cm on an engine lathe. Cutting conditions are the following: cutting speed = 90m/min, feed = 0.35mm/rev. Are required two rough operations. The bar will be held in a chuck and supported on the opposite end in a live centre. With this workholding setup, one end must be turned to diameter; then the bar must be reversed to turn the other end. Using an overhead crane available at the lathe, the time to reverse the bar is 3.0 minutes. Loading and unloading operations (at the beginning and at the end of the manufacturing process) take a total of 5 minutes. For each turning cut an allowance must be added to the cut length for approach and overtravel. The total allowance (approach plus overtravel) = 15mm. Determine the total cycle time to complete this turning operation

Elements Of Electromagnetics
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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A 40cm diameter workbar that is 80cm long is to be turned down to a diameter of 35cm on an engine lathe. Cutting conditions are the following: cutting speed = 90m/min, feed = 0.35mm/rev. Are required two rough operations. The bar will be held in a chuck and supported on the opposite end in a live centre. With this workholding setup, one end must be turned to diameter; then the bar must be reversed to turn the other end. Using an overhead crane available at the lathe, the time to reverse the bar is 3.0 minutes. Loading and unloading operations (at the beginning and at the end of the manufacturing process) take a total of 5 minutes. For each turning cut an allowance must be added to the cut length for approach and overtravel. The total allowance (approach plus overtravel) = 15mm. Determine the total cycle time to complete this turning operation 100
Transcribed Image Text:A 40cm diameter workbar that is 80cm long is to be turned down to a diameter of 35cm on an engine lathe. Cutting conditions are the following: cutting speed = 90m/min, feed = 0.35mm/rev. Are required two rough operations. The bar will be held in a chuck and supported on the opposite end in a live centre. With this workholding setup, one end must be turned to diameter; then the bar must be reversed to turn the other end. Using an overhead crane available at the lathe, the time to reverse the bar is 3.0 minutes. Loading and unloading operations (at the beginning and at the end of the manufacturing process) take a total of 5 minutes. For each turning cut an allowance must be added to the cut length for approach and overtravel. The total allowance (approach plus overtravel) = 15mm. Determine the total cycle time to complete this turning operation 100
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