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Welding method of dissimilar metal sheets

A technology of dissimilar metals and welding methods, applied in welding equipment, metal processing, welding equipment, etc., can solve the problems of rising material cost, low welding strength, limited application, etc., to improve welding strength, improve welding quality, and smooth welding joints. bright effect

Active Publication Date: 2016-12-07
青岛开拓隆海智控有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only be lap welded, but not butt welded, between dissimilar plates. This structure or appearance limits its application in some products.
[0003] However, the welding strength of this type of welding is low, and due to the increase of solder, the material cost increases

Method used

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  • Welding method of dissimilar metal sheets
  • Welding method of dissimilar metal sheets
  • Welding method of dissimilar metal sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, this embodiment is the butt welding of the copper plate 1 and the iron plate 2, and the thickness of the two plates is the same.

[0026] Before welding, the edges of the copper plate 1 and the iron plate 2 are abutted in contact to form a weld 3, which does not need solder. When the edges of the copper plate 1 and the iron plate 2 are butted, apply a force F in opposite directions on the other side of the copper plate 1 and the other side of the iron plate 2, so that the edges of the copper plate 1 and the iron plate 2 are welded during the entire welding process. Stay in touch. Then determine the relative position of the welding seam 3 and the welding torch nozzle 4, the heating equipment adopted in this embodiment is a single welding torch, so that the welding torch nozzle 4 is shifted toward the iron plate 2 direction. The offset is determined according to the melting point temperature of the two metals, and more heat is distributed to t...

Embodiment 2

[0028] Such as figure 2 As shown, this embodiment is the butt welding of the copper plate 1 and the iron plate 2, and the thickness of the two plates is the same.

[0029] Before welding, the edges of the copper plate 1 and the iron plate 2 are abutted in contact to form a weld 3, and the weld 3 does not need solder. When the edges of the copper plate 1 and the iron plate 2 are butted, apply a force F in opposite directions on the other side of the copper plate 1 and the other side of the iron plate 2, so that the edges of the copper plate 1 and the iron plate 2 are welded during the entire welding process. Stay in touch. Then determine the relative position of welding seam 3 and welding torch nozzle 4, the heating equipment that adopts in the present embodiment is double welding torch, wherein the welding torch nozzle 4 of output higher heat is corresponding to handle iron plate 2, and the welding torch nozzle 4 of output lower heat is corresponding The copper plate 1 is p...

Embodiment 3

[0031] Such as image 3 As shown, this embodiment is lap welding of copper plate 1 and iron plate 2, and the thickness of the two plates is the same.

[0032] Before welding, the edges of the copper plate 1 and the iron plate 2 overlap, and the overlapping contact forms a weld 3, and the weld 3 does not need solder. Then determine the relative position of welding seam 3 and welding torch nozzle 4, the heating equipment that adopts in the present embodiment is a single welding torch, welding torch nozzle 4 points to welding seam 3 and the heating zone shifts toward iron plate 2 directions, the central axis of welding torch nozzle 4 The included angle with the overlapping plane is 45°, so that during welding, the iron plate 2 close to the welding torch needs to form a mutual melting zone, which is completely or partially melted, and the copper plate 1 is partially melted at a position where a mutual melting zone needs to be formed, and the two plates pass through Self-fluxing s...

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Abstract

The invention relates to a dissimilar metal plate welding method. Welding methods such as argon arc welding, plasma welding, quasi ion welding, laser welding and high frequency welding are carried out on a dissimilar metal plate. High-melting metal is allocated with high heat and low-melting metal is allocated with low heat according to the heat distribution relation, so that dissimilar metal at the welding beads is synchronously welded in a self-fusion mode. According to the dissimilar metal plate welding method, the welding techniques such as argon arc welding, plasma welding, quasi ion welding, laser welding and high frequency welding are carried out on the dissimilar metal plate; in the time of welding, heat of all the parts is stably controlled, so that the dissimilar metal plate to be welded can reach the fusion temperate and good self-fusion is achieved; welding flux is not needed and meanwhile, the welding quality is improved, a welding opening is smooth and bright, and the welding strength is improved by more than 1.2 times compared with traditional flame welding..

Description

technical field [0001] The present invention relates to the field of welding. Background technique [0002] In the field of welding, plate-to-plate welding is very common. After years of development, the welding process has basically matured. For dissimilar metals, it is generally necessary to use solder, which is due to the difference in physical properties of the dissimilar metals themselves. For example, copper and iron, the melting point of copper is about 1000°C, and the melting point of iron is about 1500°C. For example, when welding at a temperature similar to copper, the iron cannot be welded. At this time, the molten copper is only attached to the surface of the iron, and no crystals of copper and iron have been formed. The surface of the welded pipe looks beautiful, but its The strength of the weld is average. If the temperature similar to that of iron is used for welding, the copper will be overburned and dirty, and the copper and iron cannot be welded. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/00B23K103/22
CPCB23K31/02B23K2101/185B23K2103/22
Inventor 孙建康
Owner 青岛开拓隆海智控有限公司
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