Special multipoint electric resistance welding method

A special resistance and multi-point technology, applied in resistance welding equipment, welding power supply, welding equipment, etc., can solve the problems of welding current and electrode pressure instability, current difference, workpiece resistance difference, etc., to improve production efficiency and ensure production The effect of simple quality and mechanical parts

Inactive Publication Date: 2012-07-11
SHANGHAI LIANNAN AUTOMOTIVE ACCESSORIES
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AI Technical Summary

Problems solved by technology

[0003] The current resistance welding methods all use constant voltage or voltage compensation, but the resistance of the workpiece is different, and the current generated after power-on will also be different, resulting in unstable welding current and electrode pressure.

Method used

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Embodiment Construction

[0011] General equipment requirements:

[0012] All operators operate standing. Therefore, the height of the operating table is 850~900.

[0013] The overall size of the equipment is controlled at 1.5X1.5X2.3M.

[0014] The appearance of the equipment and the operating table should be basically the same.

[0015] The equipment and operating table should be equipped with fluorescent lighting.

[0016] The equipment and operating table should be equipped with documents and recording boards, which are required to be conveniently held and viewed by operators.

[0017] Equipment with mechanical movement must be equipped with an emergency stop button. Safety and error-proofing measures (two-button linkage) must be used.

[0018] The flow of production products and the handling of operators should be facilitated between the equipment and the operating table.

[0019] The projection welding cycle consists of four basic phases:

[0020] Preloading: The electrode is lowered to th...

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Abstract

The invention relates to an electric resistance welding method for an automatic production line and provides a special multipoint electric resistance welding method. According to the method, stable and controllable welding current is supplied and the welding quality and efficiency are increased. Structural design and parameter control are performed on a multipoint electric resistance welding device by taking a fuel oil distributing pipe piece as a main part and a special producing multipoint electric resistance welding device as a research object. The multipoint electric resistance welding device specifically comprises a mechanical device, a power supply system and a control system (the device also comprises a safety system); electrode feeding and pressure supply are realized by adopting pneumatic transmission; a single-phase 380V power supply is adopted; time-sharing conduction bidirectional controllable silicon is adopted at secondary, so that the flow equalizing problem of multipoint welding is solved; a PLC (Programmable Logic Controller) is used for finishing the action and timing control of an automatic welding process; and a NZK-1 triggering module and a voltage compensation module are used for ensuring the fluctuation of voltage within a small scope and ensuring the welding quality.

Description

technical field [0001] The invention relates to a resistance welding method in an automatic production line. Background technique [0002] Resistance welding has high production efficiency, easy control and realization of welding quality, mechanization and automation of production, and has been widely used in large-scale automatic production lines. Resistance welding uses electrodes to exert a certain pressure on the object to be welded while energizing, and uses the contact resistance between the electrodes to generate Joule heat to melt the metal to achieve the purpose of welding. To obtain proper resistance heat, there must be an external power supply, and welding is always under pressure, so welding current and electrode pressure are the basic conditions for forming resistance welding. [0003] The current resistance welding methods all use constant voltage or voltage compensation, but the resistance of the workpiece is different, and the current generated after power-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/00B23K11/24
Inventor 陈陆荣
Owner SHANGHAI LIANNAN AUTOMOTIVE ACCESSORIES
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