Coil-ends joined for continuous rolling of sheet and strip - automatic centering, cut-off, flash butt welding and grooving

摘要

The end of the strip being rolled is moved backwards over a clamp and welding cheeks until it meets the guide-edge in the lower part of flying-shears; it is then centred and a looping device takes up any bow in the strip; a strip-support roll then drops so that the strip rests on the lower welding cheek. The end of the new coil of sheet or strip is fed in from the other (i.e. the entry) side of the machine and is treated in a similar manner, both ends being in position. Clamps outside the two pairs of welding cheeks clamp the strips and move the two edges slightly away from the guide in the shears, which then cut the edges and move out of the gap between two heads which carry the welding cheeks. When the flying shears have left the gap, one head moves towards the second, stationary head and a flash butt weld is made in the normal way. The strip then moves through a deburring unit and a groove-stamper. The cycle is completely automatic due to using servo-mechanisms etc. which can be operated by electric, mechanical, hydraulic or pneumatic means.