A metal box is to be welded together. The base is 6 in. X 10 in., and the wall height is 4 in. All inside corners are to be :-in. fillet welds (no extra metal). The material is a low-carbon sheet steel 0.20 in. thick. Determine the time and cost to weld a lot of 40 boxes when the setup time is 24 min and the following data apply:
a. What is the weight of the weld metal deposited? (0.00875 lb/in.)
b. What is the deposition rate? (8.4 lbhr during welding)
c. What is the total length of weld? (4 ft)
d. What is the labor cost per ft? ($0.300/ft)
e. What is the overhead cost per ft? ($0.600/ft)
f. What is the material cost (electrode) per foot? ($O.O275/ft)
g. What is the gas cost per foot? ($O.lSO/ft)
h. What is the power cost per foot? ($O.OlS/ft)
i. What is the total cost for 40 units? ($189.20)
j. What is the total time for 40 units? (264 min, or 4.4 hr)