Question

in a mass production of machining the cutting speeds are 100,200, 300 ft./minute and the corresponding production rates (P) are 8,12 and 10 parts per hour respectively. Calculate the best cutting speed and the corresponding maximum number of parts per hour

Answer 1

Answer:

The best production speed = 300ft/minute

18000/10 = 1800ft/part hr

Explanation:

Cut Speed A = 100ft/minute

Cut speed B = 200ft/minute

Cut speed C = 300ft/minute

Since 60 minutes = 1 hour

Machine works for one hour

Total length with cut for speed A = 60* 100 = 6000ft

Total length with cut speed B = 200 *60 = 12000ft

Total length with cut speed C = 300 * 60 = 18000ft

Number of 8 part in length A = 6000/8 = 750ft/part hr

Number of 12 parts in length B = 12000/12 = 1000ft/part hr

Number of 10 parts in length C =

18000/10 = 1800ft/part hr