Manufacturing And Production Technology
Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.

600 welds/min, 1500 mm/min
22 welds/min, 55 mm/min
3000 welds/min, 75 mm/min
500 welds/min, 1250 mm/min

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Manufacturing And Production Technology
The effect of setting a boring tool above center height leads to

Decrease in both effective rake angle and effective clearance angle
Increase in both effective rake angle and effective clearance angle
Increase in the effective rake angle and a decrease in the effective clearance angle
Decrease in the effective rake angle and an increase in the effective clearance angle

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