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Resistance welding method for preventing workpiece damage

A resistance welding and resistance welding machine technology, applied in resistance welding equipment, electrode features, manufacturing tools, etc., can solve the problems of material waste, workpiece surface damage, labor and material consumption, etc., to avoid damage, improve quality, and avoid virtual welding. Effect

Active Publication Date: 2019-12-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is precisely because resistance welding is local heating, so local hot spots in the welding process can easily cause damage to the surface of the workpiece
In order to reduce the damage of the workpiece, the energy needs to be precisely controlled during the micro-connection, but the shape and size of different workpieces are not the same, and it takes many tests to obtain the optimal process parameters, which consumes a lot of manpower and material resources, resulting in extreme damage to the material. big waste

Method used

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  • Resistance welding method for preventing workpiece damage
  • Resistance welding method for preventing workpiece damage
  • Resistance welding method for preventing workpiece damage

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specific Embodiment approach 1

[0016] Specific implementation mode one: as Figure 1 ~ Figure 3 As shown, the present invention discloses a resistance welding method for preventing workpiece damage. The method is realized by using an upper electrode 1 and a lower electrode 2. The upper electrode 1 and the lower electrode 2 are used together, and the upper electrode 1 is a cuboid structure. And fixedly connected with the upper clamp of the resistance welding machine, the lower electrode 2 is a cylindrical structure, and the middle part of the adjacent end surface of the cylindrical body and the upper electrode 1 is provided with a placement groove 3 along its radial direction through its circumferential surface , and fixedly connected with the lower chuck of the resistance welding machine, the lower chuck of the resistance welding machine is connected with the negative pole of the resistance welding machine power supply, the material of the upper electrode 1 and the lower electrode 2 is copper or tungsten; th...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment is a further description of Embodiment 1. The pressing force between the pair of upper electrodes 1 and the workpiece to be welded in Step 2 is 1kg-5kg.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment is a further description of Embodiment 1. The peak value of the pulse current in step 4 is 0.3 kA-3 kA, and the pulse time is 10 ms-100 ms.

[0023] The invention aims at providing an efficient and practical new method for preventing workpiece damage in the resistance butt welding process, aiming at the disadvantage that the existing resistance welding method is very easy to cause damage to the appearance of the workpiece.

[0024] The principle of the present invention is: since the resistance heat in the resistance welding process is related to the shape and structure of the electrode head, the contact area between the upper electrode 1 and the workpiece to be welded is much smaller than the contact area between the lower electrode 2 and the workpiece to be welded, so the heat is mainly concentrated in The position of the upper electrode 1, thereby generating a local hot spot to realize the connection of the workpiece. The contact area be...

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Abstract

The invention discloses a resistance welding method for preventing workpiece damage, and belongs to the technical field of micro-resistance welding. The method is realized by utilizing an upper electrode and a lower electrode, the upper electrode and the lower electrode are matched for use, the upper electrode is of a cuboid structure and is fixedly connected with an upper chuck of a resistance welding machine, the lower electrode is of a cylindrical structure, and the cylinder and the middle of the adjacent end surface of the upper electrode is provided with a placement groove along the radial direction of the upper electrode and is fixedly connected with a lower chuck of the resistance welding machine. One side of the workpiece to be welded needs to be protected is placed in the placement groove of the lower electrode; the upper electrode is adjusted to be pressed on the workpiece to be welded; the upper electrode is fixed with the upper chuck of the resistance welding machine, so that a conductive path is formed among the upper electrode, the to-be-welded piece and the lower electrode; and a power supply of the resistance welding machine is started, a pulse current is formed between the upper electrode and the lower electrode, and the resistance welding of the workpiece is completed.

Description

technical field [0001] The invention relates to a resistance welding method for preventing workpiece damage, and belongs to the technical field of micro-resistance welding. Background technique [0002] Although the traditional brazing technology is mature, it is easy to cause the rapid dissolution of the thin film metal layer and the interface reaction during brazing, which in turn leads to the failure of the workpiece in the later stage. At the same time, there are also problems that require overall heating and multiple remelting. Therefore, micro Resistance welding technology, because of its advantages of simple operation, local heating, reliable connection and low cost, is widely used in the manufacture of microelectronics, micromechanical electronics (MEMS), and biomedical devices, such as microwave devices, batteries, Sensors, implanted pacemakers and other fields. [0003] The wide application of micro-resistance welding is suitable for a variety of material systems,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/00B23K11/30B23K11/36
CPCB23K11/00B23K11/30B23K11/36
Inventor 田艳红王尚孔令超
Owner HARBIN INST OF TECH