Method of manufacturing metallic bent pipe

Details Method of manufacturing metallic bent pipe Method of manufacturing metallic bent pipe

F - Mech Eng,Light,Heat,Weapons

16

L

26/157

F16L 55/00 (2006.01) B21D 7/025 (2006.01)

Patent

CA 1213421

ABSTRACT OF THE DISCLOSURE A method capable of continuously manufacturing at both ends of a bent pipe portion a metallic bent pipe having straight pipe portions which have been subjected to the same heat treatment as that for the bent pipe portion. The method comprises the steps of: inserting the front end portion of a metallic pipe to be bent into a heating device, and advancing the pipe, with the heating device stationary, thereby to heat-treat the pipe; retracting the heating device and advancing the pipe to heat-treat the same; terminating the advance of the pipe while retracting the heating device thereby to heat-treat the pipe, and clamping the pipe by a bending apparatus part; terminating the retraction of the heating device, advancing the pipe and applying a bending moment to the pipe thereby to bend it; terminating the advance of the pipe and heat-treating it while retracting the heating device, and releasing the pipe from the bending apparatus part; retracting the heating device and advancing the pipe to heat-treat it; and terminating retraction of the heating device and moving the pipe to heat-treat it.

435510

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