Sheet-metal blanks are loaded into a stamping operation by an industrial robot. Loading time is 15 sec. Actuating the OBI press takes 6 sec, including part ejection. The completed parts are dropped by gravity into a container. The cost rate of the press is $54/hr, which includes the cost rate of the robot. The sampling die cost $36,000 and is expected to produce a total of 80,000 stampings during its life. Batch quantity is 1,500 parts. Time to set up the press before production is 15 min. Assume availability = 100%, scrap rate = 0%. Determine

(a) time to complete the batch,
(b) average production rate, and
(c) cost per piece of the unit operation.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?