A method for welding aluminum bus bars outdoors in a cold environment

An aluminum busbar and environmental technology, applied in the direction of welding equipment, welding medium, welding equipment, etc., to achieve the effect of promoting self-propagating reaction, stable reaction and improving welding quality

Active Publication Date: 2020-11-17
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to realize an outdoor welding method and overcome the influence of cold environment on welding quality

Method used

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  • A method for welding aluminum bus bars outdoors in a cold environment
  • A method for welding aluminum bus bars outdoors in a cold environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Perform outdoor welding in an environment with an outdoor temperature of 5°C. Clean the cross-section of the aluminum busbar to be welded, and then place a base with a suitable height under the aluminum busbar to be welded and make the parts of the aluminum busbar to be welded close together. prepare a figure 2 The shown through-hole graphite crucible 7 has a diameter of 0.2-1 m, which is placed above the aluminum busbar. Attach the baffle 9 to the internal through hole of the graphite crucible 7, and then add 37% aluminum powder, 32% tin oxide, 6% aluminum-copper alloy, 2% magnesium oxide, 14% zinc sulfate, 1% boron powder, Self-propagating flux with 3% silicon fume and 5% calcium fluoride8. Stir it evenly after checking that there is no powder leakage phenomenon, spread a layer of gunpowder powder 6 on the surface of the flux and insert a lead wire 5 for ignition in the powder. will be like figure 1 The resistance wire heating equipment is placed on the periphery...

Embodiment 2

[0044] Perform outdoor welding in an environment where the outdoor temperature is -20°C. Clean the cross-section of the aluminum busbar to be welded, and then place a base with a suitable height under the aluminum busbar to be welded and make the parts of the aluminum busbar to be welded close together. prepare a figure 2 The shown through-hole graphite crucible 7 has a diameter of 0.2-1 m, which is placed above the aluminum busbar. Stick the baffle 9 on the inner through hole of the graphite crucible 7, and then add 35% aluminum powder, 33% tin oxide, 5% aluminum-copper alloy, 3% magnesium oxide, 13% zinc sulfate, 2% boron powder, Self-propagating flux with 4% silicon fume and 5% calcium fluoride8. Stir it evenly after checking that there is no powder leakage phenomenon, spread a layer of gunpowder powder 6 on the surface of the flux and insert a lead wire 5 for ignition in the powder. will be like figure 1 The resistance wire heating equipment is placed on the periphery...

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Abstract

The invention discloses a method for outdoor welding of aluminum busbars in a cold environment. The method comprises the steps that firstly, according to the number of the aluminum busbars needing tobe welded, a self-propagating welding flux with a certain mass is predicted and prepared, the sections of the aluminum busbars preparing to be welded are cleared and closely attached together to be placed on a base, a graphite crucible with a through hole in the bottom is placed on the aluminum busbars, the through hole is blocked by a blocking piece easy to melt, then the self-propagating weldingflux and gunpowder are added sequentially, a leading wire is inserted into the powder, resistance wire heating equipment is placed at the periphery of the graphite crucible to preheat the graphite crucible and conduct heat preservation on the graphite crucible, the leading wire is ignited to enable the welding flux to be subjected to a self-propagating reaction, thus the aluminum busbars are welded, the resistance wire heating equipment is stopped after welding, after cooling is conducted to the room temperature, the resistance wire heating equipment and the graphite crucible are removed, welding slag is removed, and polishing is conducted to complete welding of the aluminum busbars. The method is easy to operate, less in working procedure, convenient to carry, low in cost, good in welding quality, safe and reliable, and the high-quality aluminum busbars can be welded in the cold outdoor environment.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to a welding method for aluminum bus bars. Specifically, it relates to a method for welding aluminum busbars outdoors in a cold environment. Background technique [0002] During the winter solstice, the outdoor temperature in most areas in the north of China will drop significantly. For example, the winter in Inner Mongolia is long and cold, and the cold season lasts for 5 months to half a year in most areas. Among them, January is the coldest month, and the monthly average temperature decreases from minus 10°C to minus 32°C from south to north. Baotou Jitai Rare Earth Aluminum, Tongshun Aluminum and other northern aluminum factories perform outdoor welding in such a harsh environment, which will seriously affect the welding quality of aluminum busbars. Aluminum busbars are mainly used in the power industry. As a part of the power generation system, the aluminum busbars play the ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K23/00B23K35/34B23K35/362B23K103/10
Inventor 张国栋朱龙强刘延东龚卓周怡成王麒瑜薛龙建杨兵梅青松
Owner WUHAN UNIV
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