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Heat preservation method for welding spots in welding process of steel pipe

A technology for steel pipes and solder joints, applied in the field of argon arc welding machines, which can solve problems such as reduced strength, reduced stability of steel pipes, and de-welding of steel pipe welds, and achieves the effects of protecting blades, prolonging service life, and reducing loss

Inactive Publication Date: 2014-11-05
CHENGDU XINGBODA PRECISION MACHINERY
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Problems solved by technology

However, after the partial welding of the steel pipe is completed, the weld seam is directly exposed to the air. Due to the difference between the air temperature and the temperature of the weld seam itself, the weld seam will directly change from high temperature to low temperature. Due to its own strengt

Method used

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  • Heat preservation method for welding spots in welding process of steel pipe
  • Heat preservation method for welding spots in welding process of steel pipe
  • Heat preservation method for welding spots in welding process of steel pipe

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Embodiment 1

[0023] Such as figure 1 , figure 2 and image 3 As shown, the method for heat preservation of solder joints during steel pipe welding of the present invention includes the following steps. First, the welded steel pipe 8 is sent out from the outlet of the semi-sealed structure 7, and directly enters the sleeve 1, and the cleaning mechanism is facing the steel pipe 8. At the 9 welds, since the temperature of the 9 welds of the steel pipe 8 is relatively high, the function of the sleeve 1 is to provide an environmental condition that can gradually cool down the welded steel pipe 8 at the 9 welds, and at the same time remove the raised bulge caused by welding. Or the residual solder is removed to avoid sudden changes in temperature from affecting the strength of the weld and to ensure the smoothness of the outer surface of the steel pipe 8 after welding; The diameter of the layer 2 decreases radially along the direction of the other end of the sleeve 1, so that the parts of the...

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Abstract

The invention discloses a heat preservation method for welding spots in the welding process of a steel pipe. A clearing mechanism is right aligned to the welding seam of the steel pipe. Due to the fact that the temperature of the welding seam of the steel pipe is high, a sleeve provides a gradually-cooling environment for the welding seam of the steel pipe which is just welded and removes protrusions generated by welding or residual welding flux, and therefore the welding strength is prevented from being influenced by sudden change of the temperature, and the smoothness of the outer surface of the welded steel pipe can be guaranteed.

Description

technical field [0001] The invention relates to an argon arc welding machine, in particular to a heat preservation method for welding spots during steel pipe welding. Background technique [0002] Stainless steel welded pipe requires deep penetration, no oxide inclusions, and the heat affected zone is as small as possible. Tungsten inert gas shielded argon arc welding has good adaptability, high welding quality, and good penetration performance. Its products are widely used in chemical industry It is widely used in industries such as , nuclear industry and food. The low welding speed is the shortcoming of argon arc welding. In order to increase the welding speed, many methods have been researched and developed abroad. Among them, the welding method of multi-electrode and multi-torch is developed from single-electrode and single-torch and applied in production. Generally, argon arc welding with three-electrode torch is used, and the wall thickness of the welded steel pipe i...

Claims

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Application Information

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IPC IPC(8): B23K9/32
CPCB23K9/32
Inventor 吴光武
Owner CHENGDU XINGBODA PRECISION MACHINERY
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