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Device for eliminating internal stress of U-shaped bent pipe by performing heating and annealing

A technology of bending pipe heating and U-shaped pipe, applied in heat treatment furnaces, furnace types, heat treatment equipment, etc., can solve the problems of poor quality, oxidation of the inner wall of the U-shaped pipe bend, and difficulty in reaching high-precision stainless steel pipes, etc. Achieve the effect of improving product quality, solving low production efficiency, and preventing heating and oxidation

Inactive Publication Date: 2011-06-01
上海华钢不锈钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner wall of the bend of the U-shaped pipe heated by this device is seriously oxidized, the quality is not very good, and it is difficult to meet the requirements of high-precision stainless steel pipes

Method used

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  • Device for eliminating internal stress of U-shaped bent pipe by performing heating and annealing
  • Device for eliminating internal stress of U-shaped bent pipe by performing heating and annealing

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0010] Depend on figure 1 It can be seen that the present invention includes: U-shaped pipe 1; also includes: parallel first guide rail 2 and second guide rail 3; the chuck on the top of the first guide rail 2 is in contact with the top of the bend of the U-shaped pipe 1 , the chuck on the top of the second guide rail 3 is in contact with the root of the bend of the U-shaped pipe 1; the first guide rail 2 and the second guide rail 3 are respectively connected with the high-frequency heater 4 to form a heating circuit.

[0011] Also includes: a protective gas device 5, a first air gun 6 and a second air gun 7; one end of the first air gun 6 and the second air gun 7 is connected to the protective gas device 5 respectively, the first air gun 6 and the second air gun 7 The other end of the tube is inserted into the two ends of the U-shaped pipe 1 ...

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PUM

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Abstract

The invention relates to a device for eliminating internal stress of a U-shaped bent pipe by performing heating and annealing. The device comprises the U-shaped bent pipe, a first guide rail and a second guide rail, wherein the first guide rail is parallel with the second guide rail; a collet on the top of the first guide rail contacts with the top end of a bending part of the U-shaped bent pipe; a collet on the top of the second guide rail is in contact with the root part of the bending part of the U-shaped bent pipe; and the first guide rail and the second guide rail are connected with a high-frequency heater respectively to form a heating loop. The device has the advantages of solving the problem of low production efficiency, improving yield and quality of products, preventing heating oxidation by introducing protective gas and guaranteeing the quality of the inner walls of the products, along with simpleness and safety in operation.

Description

technical field [0001] The invention relates to a device for eliminating internal stress by heating and annealing, in particular to a device for eliminating internal stress by heating and annealing for a U-shaped elbow. Background technique [0002] During the bending process of the U-bend, a large amount of internal stress will be generated in the bend, which will affect the quality of the product, which is not allowed for stainless steel pipes. Therefore, it is necessary to perform local heating and annealing on the bend of the U-bend to eliminate internal stress. [0003] In the prior art, local heating is usually performed by high-frequency induction heating heat treatment. This device inserts the bent part of the stainless steel U-shaped tube into the heating coil, connects the heating coil to the power supply for heating, and adjusts the current to control the heating temperature. However, the operation of this device is complicated, and each stainless steel pipe mus...

Claims

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Application Information

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IPC IPC(8): C21D9/08C21D1/30
Inventor 王爵光
Owner 上海华钢不锈钢有限公司
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