Machine for forming a metal strip into a tubular form having a s

Details Machine for forming a metal strip into a tubular form having a s Machine for forming a metal strip into a tubular form having a s

1993-06-24

1994-09-13

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

219 61, 2191304, 228 26, B23K 902

Patent

active

053461169

ABSTRACT:
A machine for continuously producing metal tubing from a flat metal strip in which the welder, weld closing rolls, and seam guide are attached to a base plate slidably attached to a support structure. The base plate is displaceable relative to the support structure between an operating position and a start position. The base plate may be displaced by a manually operated actuator or by an electromechanical mechanism. The base plate is placed in the start position when the machine is stopped and is slowly displaced to the operating position when the machine is restarted. During displacement of the base plate to the operation position, the welder overwelds a portion of the seam previously welded. The seam weld during a restart transition of the base plate from the start to the operating position produces a defect-free seam weld.

REFERENCES:
patent: 3729125 (1973-04-01), Hano
patent: 4269639 (1981-05-01), Lewis
patent: 4628180 (1986-12-01), Edberg
patent: 4673121 (1987-06-01), Holmgren

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