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Sheet metal welding method

A welding method and sheet metal technology, applied in the field of sheet metal welding, can solve problems such as difficulty in ensuring the appearance of solder joints, increased processing costs, and poor control of penetration depth, etc., to improve arc stability, weld bead wetting and forming Good, the effect of improving the fluidity of the molten pool

Inactive Publication Date: 2018-06-01
宁波君铭钣金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the welding of existing welding machines and welding processes, because the electrodes need to press the workpiece and the parts of the two plates are also attached to each other except for the welding position, a large current is required, and dents will be left on the front and back of the workpiece Not only that, because the plate is relatively thin, when the size of the molten pool is sufficient, the penetration depth in the thickness direction of the plate is not easy to control, and even the phenomenon of melting through occurs, and the appearance of the solder joint after cooling is difficult to be guaranteed. For the sake of appearance quality, for The dents on the front are all overcome by the back-filling soil, which leads to an increase in processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A sheet metal welding method, the specific steps are as follows:

[0019] (1) The first welded sheet metal part and the second welded sheet metal part to be welded are alloy steel material and low carbon steel material respectively;

[0020] (2) Grind out the chamfering of the second welded sheet metal, then coat the flux, and dry it with cold air; the flux used is a mixture powder with a particle size of 150 mesh, and the mixture powder is composed of the following components: sodium fluoride 10 Parts, 5 parts of dichromium oxide, 3 parts of ferric oxide, 3 parts of titanium dioxide, 1 part of manganese oxide, 2 parts of ammonium chloride, 5 parts of zinc chloride, 2 parts of silicon dioxide, in parts by weight, When used, add solvent to make a paste;

[0021] (3) setting a boss at the end of the first welded sheet metal part; docking the first welded sheet metal part and the second welded sheet metal part according to design requirements; the boss is conical; The ra...

Embodiment 2

[0026] A sheet metal welding method, the specific steps are as follows:

[0027] (1) The first welded sheet metal part and the second welded sheet metal part to be welded are alloy steel material and low carbon steel material respectively;

[0028] (2) Grind out the chamfering of the second welded sheet metal, then apply flux, and dry it with cold air; the flux used is a mixture powder with a particle size of 180 mesh, and the mixture powder is composed of the following components: sodium fluoride 12 Parts, 6 parts of dichromium oxide, 3.5 parts of ferric oxide, 3.5 parts of titanium dioxide, 1.5 parts of manganese oxide, 2.5 parts of ammonium chloride, 6 parts of zinc chloride, 2.5 parts of silicon dioxide, in parts by weight, When used, add solvent to make a paste;

[0029] (3) setting a boss at the end of the first welded sheet metal part; docking the first welded sheet metal part and the second welded sheet metal part according to design requirements; the boss is conical;...

Embodiment 3

[0034] A sheet metal welding method, the specific steps are as follows:

[0035] (1) The first welded sheet metal part and the second welded sheet metal part to be welded are alloy steel material and low carbon steel material respectively;

[0036] (2) Grind out the chamfering of the second welded sheet metal, then apply flux, and dry it with cold air; the flux used is a mixture powder with a particle size of 200 mesh, and the mixture powder is composed of the following components: sodium fluoride 15 8 parts, 8 parts of dichromium oxide, 4 parts of ferric oxide, 4 parts of titanium dioxide, 2 parts of manganese oxide, 3 parts of ammonium chloride, 8 parts of zinc chloride, 3 parts of silicon dioxide, in parts by weight, When used, add solvent to make a paste;

[0037] (3) setting a boss at the end of the first welded sheet metal part; docking the first welded sheet metal part and the second welded sheet metal part according to design requirements; the boss is conical; The ra...

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Abstract

The invention discloses a sheet metal welding method. The sheet metal welding method comprises the following specific steps that a second welded sheet metal part is polished and chamfered, then coatedwith a flux and blown to dry with cold wind; a boss is arranged at the end of the first welded sheet metal part; the first welded sheet metal part and a second welded sheet metal part are docked according to design requirements; a ternary gas mixture is used as welding shield gas; the first welded sheet metal part and an electrode to be welded are preheated; and welding is performed on the portion, in contact with the second sheet metal part, of the boss. According to the sheet metal welding method, the ternary gas mixture is used as the welding shield gas, and carbon dioxide is added to argon, so that weld heat input can be increased, and the arc stability is improved; and the weld bead wetting and forming are better, the heat input can be increased by adding helium, the flowability of aweld pool is improved, and due to the fact that helium is inert, no melting loss influence on the weld metal exists.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a sheet metal welding method. Background technique [0002] At present, in the sheet metal manufacturing industry, welding is widely used as a common connection method. Now, the current spot welding method is used to place two sheet metal plates of the same material between two welding electrodes for welding. . The tip area of ​​the welding electrode for spot welding is small, which is generally similar to the size of the desired welding spot. When the welding electrodes on both sides are energized, a large enough current is passed through, and a large amount of resistance heat is generated at the contact between the welding electrode and the plate, thus A molten pool is generated centering on the area where the two plates are aligned with the welding electrodes. When the molten pool meets the size of the solder joint, the power is turned off and cooled. A certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 杨安君
Owner 宁波君铭钣金有限公司