Conduit making machine with diameter control and method

Details Conduit making machine with diameter control and method Conduit making machine with diameter control and method

B - Operations, Transporting

21

C

113/52

B21C 37/08 (2006.01) B21C 37/12 (2006.01)

Patent

CA 1047327

A B S T R A C T A machine and method for making spiral pipe from a continuous strip of sheet metal including a corrugating mill which forms corrugations in the strip and drives it through a three-roll binding mill which bends the strip into helical convolutions and guides adjacent edges thereof into an inter-locking relationship and a pair of lock up rolls for crimping the interlocked edges of the convolutions into a continuous seam, which rolls are manually or automatically adjustable radially relative to the pipe axis whereby its diameter may be accurately con- trolled. Adjustment of said rolls radially inwardly effects a diameter increase whereas adjustment outwardly decreases the diameter of the pipe.

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