Method to cold-bend resin-coated ribbed steel pipes

Details Method to cold-bend resin-coated ribbed steel pipes Method to cold-bend resin-coated ribbed steel pipes

1996-01-17

1999-06-29

Crane, Daniel C.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflectors arranged to bend work longitudinally of...

72369, 72159, 72170, B21D 7022

Patent

active

059163194

ABSTRACT:
A resin-coated ribbed steel pipe that is provided with an axially extending rib that is made from the same material as the coating and forms a hold groove is fed forward and bent along with the rotation of a shaping roller that is provided with an accommodating groove having a shape identical to the half of the cross section of the pipe that includes such rib and also has a protruding wheel that inserts itself into the hold groove as the pipe is fed forward, the reaction force created thereby being managed by a device that, possessing a shape identical to the other half of the cross section of the pipe, suppresses the reaction force and yet allows the feeding of the pipe.

REFERENCES:
patent: 3885412 (1975-05-01), Vance
patent: 4266417 (1981-05-01), Imamura

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