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welding device

A welding device and welding current technology, applied in welding equipment, welding power source, resistance welding equipment and other directions, can solve the problem of large inductance, and achieve the effect of reducing inductance, size miniaturization, and reducing loss

Active Publication Date: 2022-04-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The welding torch itself is metal, and it also constitutes a circuit through which the welding current flows. Therefore, the overall inductance of the circuit is large.

Method used

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Embodiment Construction

[0050]

[0051] Hereinafter, a welding torch 100 according to a first embodiment of the present invention will be described with reference to the drawings.

[0052] figure 1 It is a perspective view showing the whole welding torch 100 of this embodiment. Below, will figure 1 In the shown orthogonal coordinates, "front" is set to "front", "rear" is set to "rear", "upper" is set to "upper", "lower" is set to "below", and " Right" is set to "right direction", and "left" is set to "left direction". The main body 103 of the welding torch 100 has a frame 101 made of, for example, a metal material. An electronic substrate 107 and a cylinder 109 are housed in the main body 103 .

[0053] The structure of the welding torch 100 is bilaterally symmetrical with respect to the center line of the short side of the main body part 103 . An energy storage unit 6 , which will be described later as an electrical storage device, is stored in a lower portion of the main body 103 . Adjacent...

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Abstract

The object of this invention is to provide the welding apparatus which can reduce the loss of welding current. The welding torch is equipped with: a switch IGBT module (9), which is connected in series with respect to the energy storage part (6) in a power supply circuit (200) that connects the energy storage part (6) that generates welding current and electrodes (111, 113) and connects the The energy storage part (6) and the electrodes (111, 113) are turned on or off; the buffer circuit (2) is connected in parallel to the IGBT module (9) in the power supply circuit 200; the collector bus bar (3) is connected Connect the collector terminal of the IGBT module (9) to one terminal of the snubber circuit (2); and the emitter bus bar (4), which is arranged near the collector bus bar (3), connect the The emitter terminal is connected to the other terminal of the snubber circuit (2), and the current direction of the collector bus bar 3 is opposite to that of the emitter bus bar (4).

Description

technical field [0001] The present invention relates to welding devices. More specifically, it relates to a welding device for welding workpieces by resistance welding. Background technique [0002] Conventionally, resistance spot welding is known as a welding method for workpieces. In resistance spot welding, for example, a welding current supplied from an energy storage device is applied to a workpiece held between electrodes of a welding torch, and the workpiece is welded by resistance heat generated in the workpiece. [0003] The welding torch itself is metal and also constitutes a circuit through which welding current flows, so the overall inductance of the circuit is large. Due to this inductance, an excessive counter electromotive force is generated when the switch is turned off, so countermeasures are required. In this regard, a configuration has been proposed in which a part of the charge accumulated in the welding torch is discharged by using a switch connected ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/24B23K11/11
CPCB23K11/11B23K11/24
Inventor 平山心祐渡边信也齐藤仁
Owner HONDA MOTOR CO LTD
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