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Oxygen-free copper casting welding technology

A welding process, oxygen-free copper technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of welding defects, poor welding performance, low operating efficiency, etc., to ensure cleanliness, improve welding quality, and yield Improved effect

Active Publication Date: 2014-02-26
DALIPAL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional welding needs to heat the weldment to a certain temperature before welding. As the temperature of the weldment decreases, the welding performance becomes worse and worse, and various welding defects are prone to occur, and the work efficiency is extremely low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The welding environment is controlled by adding air conditioners and heating to meet the welding requirements. The ambient temperature is controlled above 20°C. During the welding process, large airflow fluctuations should be avoided, and construction should be carried out in a closed space.

[0020] Before welding, mix anhydrous alcohol and CJ301 flux and apply it on the surface of the welding port of the cast copper parts, and then use ordinary oxygen-free copper wire for argon arc welding.

[0021] The volume mixing ratio of absolute alcohol and CJ301 flux is: absolute alcohol: CJ301 = 1:3.5.

[0022] During the welding process, the mass ratio of 25% nitrogen, 35% argon, and 40% helium is used as the protective medium.

Embodiment 2

[0024] The welding environment is controlled by adding air conditioners and heating to meet the welding requirements. The ambient temperature is controlled above 20°C. During the welding process, large airflow fluctuations should be avoided, and construction should be carried out in a closed space.

[0025] Before welding, mix anhydrous alcohol and CJ301 flux and apply it on the surface of the welding port of the cast copper parts, and then use ordinary oxygen-free copper wire for argon arc welding.

[0026] The volume mixing ratio of absolute alcohol and CJ301 flux is: absolute alcohol: CJ301 = 1:2.5.

[0027] During the welding process, the mass ratio of 35% nitrogen, 25% argon, and 40% helium is used as the protective medium.

Embodiment 3

[0029] The welding environment is controlled by adding air conditioners and heating to meet the welding requirements. The ambient temperature is controlled above 20°C. During the welding process, large airflow fluctuations should be avoided, and construction should be carried out in a closed space.

[0030] Before welding, mix anhydrous alcohol and CJ301 flux and apply it on the surface of the welding port of the cast copper parts, and then use ordinary oxygen-free copper wire for argon arc welding.

[0031] The volume mixing ratio of absolute alcohol and CJ301 flux is: absolute alcohol: CJ301 = 1:3.

[0032] During the welding process, a mass ratio of 32% nitrogen, 33% argon, and 35% helium is used as the protective medium.

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PUM

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Abstract

The invention discloses an oxygen-free copper casting welding technology and relates to the technical field of oxygen-free copper casting welding technology. According to the oxygen-free copper casting welding technology, anhydrous alcohol and CJ 301 scaling powder coat on a welded junction surface of a copper casting after being mixed and then argon-arc welding is performed; the volume mixing ratio of the anhydrous alcohol and the CJ 301 scaling powder is 1 to 2.5 to 3.5; the ingredient and mass ratio of adopted medium during welding process is 25 to 35 % of nitrogen, 25 to 35 % of argon and 35 to 50 % of helium which are served as protective medium; an optimization of the ingredient mass ratio in the protective medium is 30 % of nitrogen, 30 % of argon and 40 % of helium; the environment temperature is maintained to be more than 20 degrees during welding. The oxygen-free copper casting welding technology can improve the welding quality of the oxygen-free copper casting to a large extent.

Description

technical field [0001] The invention relates to the technical field of copper casting welding. Background technique [0002] Copper will have a strong tendency to absorb hydrogen and oxygen during the casting process, and there will be a certain amount of impurities in the casting. Hydrogen, oxygen and impurities will affect the welding quality and easily produce welding defects; because copper is a good conductor of heat, The heat dissipation efficiency is about 8 times that of steel, so it is difficult to form a molten pool during welding. To sum up, cast copper welding has high technical requirements, and it is difficult to implement. [0003] Traditional welding needs to heat the weldment to a certain temperature before welding. As the temperature of the weldment decreases, the welding performance becomes worse and worse, and various welding defects are prone to occur, and the work efficiency is extremely low. Contents of the invention [0004] The technical problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/23B23K9/235B23K35/38B23K103/12
CPCB23K9/16B23K9/23B23K9/235B23K35/383B23K2103/12
Inventor 闫东成殷志祥刘宏靖韩爱民肖厚恩
Owner DALIPAL PIPE
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