U-shape pipe elbow destressing servo clamping device and use method thereof

Abstract

The invention discloses a U-shape pipe elbow destressing servo clamping device, and relates to the field of heat treatment. The U-shape pipe elbow destressing servo clamping device comprises a left clamping unit and a right clamping unit which are arranged in a bilaterally symmetric manner; the left clamping unit comprises an air cylinder with the output end facing downwards vertically, and an upper clamping component and a lower clamping component which are arranged in a vertically symmetric manner; the upper clamping component comprises a spherical supporting seat, an insulating block and a conductive clamping block; the spherical supporting seat is fixedly connected with the output end of the air cylinder; the spherical supporting seat comprises a head with the bottom being in a downwards bulged spherical structure; a supporting groove being in a downwards bulged spherical structure is formed in the top of the insulating block; the head of the spherical supporting seat is connected with the supporting groove of the insulating block and can rotate along the supporting groove; the conductive clamping block is fixed at the bottom of the insulating block; and a clamping groove in an indented spherical structure is formed in the bottom surface of the conductive clamping block. According to the U-shape pipe elbow destressing servo clamping device, a clamped part of a U-shape pipe can freely extend and contract during the heat treatment, so that the deformation is reduced, and the situations that the quality of the internal surface is unqualified and an internal vortex detection signal is generated are avoided.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a U-shaped pipe elbow stress relief follow-up clamping device. Background technique [0002] Using low voltage and high current to heat the elbow end of the U-shaped tube to the process temperature, and then performing corresponding heat preservation and cooling is a common treatment method for elbow stress relief. However, due to the physical characteristics of thermal expansion and contraction of the material, the U-shaped The elbow of the pipe will inevitably expand and contract during the heating and cooling process. If the conductive clamp block hinders and restricts the extension and contraction of the steel pipe during this process, it will have a certain impact on the front end of the clamped part of the steel pipe (especially for thin-walled pipes), which will be seen in this part during endoscopic inspection. There are crescent-shaped traces on the inner wall, and abnorma...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the deformation of the elbow is hindered during the stress-relief treatment of the U-shaped pipe, and to overcome the shortcomings of the prior art, a U-shaped pipe elbow stress-relieving follow-up clamping device is provided, so that the U-shaped pipe is clamped The holding part can expand and shrink freely with the temperature change of the elbow part during the heat treatment process

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