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Arc welding method and arc welding apparatus

An arc and preheating technology, applied in arc welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as irregularities, inconsistent joint shapes, and burn-through of welding parts

Inactive Publication Date: 2011-10-12
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, since the arc is generated to the same welded part for a long time, the welded part is more likely to burn through, or in the case of successful welding, the shape of the joint tends to be inconsistent (irregular)

Method used

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  • Arc welding method and arc welding apparatus
  • Arc welding method and arc welding apparatus

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Embodiment Construction

[0045] Embodiments of the present invention are described below with reference to the drawings. It should be understood that throughout the specification, the term "connected" means "electrically connected", unless otherwise defined. Furthermore, terms indicating directions given in the specification, such as top, bottom, left and right, etc., refer to directions in which the drawings are viewed with reference to.

[0046] now refer to Figures 1 to 7 An arc welding apparatus according to an embodiment of the present invention is described.

[0047] figure 1 is a schematic diagram illustrating a configuration example of the arc welding apparatus 10 according to this embodiment. In the embodiment of the present invention, the arc welding device 10 is provided as a device for a TIG (tungsten inert gas) welding device or a plasma arc welding device. figure 1 The illustrated arc welding apparatus 10 includes a base material 50 (ie, a first base material 51 and a second base ...

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Abstract

The invention discloses an arc welding method and an arc welding apparatus. A base metal 50 composed of a plurality of metallic materials 51, 52 having an oxygen content of 10 ppm is first preheated partly or overall. Then AC (alternating current) current (I) is made to pass through the preheated base metal and an electrode (30) so as to generate an arc for welding the metallic materials. The waveform of the current is changed with time between a peak current value (Ip) and a base current value (Ib) excluding a current of zero value only in one of plus and minus polarity sides of the current. A current ratio defined by dividing a current amplitude (Iw) between the peak and base current values (Ip, Ib) by a current average (Iv) of the alternating current is a range of 0.5 to 2.0. The alternating current has a frequency of 500 Hz or higher.

Description

technical field [0001] The present invention relates to an arc welding method in which an arc is generated between a base material composed of a metal material and an electrode to weld the metal materials to each other, and an arc welding apparatus capable of performing such a welding work. Background technique [0002] Arc welding methods are known. For example, JP-A-2001-054263 discloses a technique using an arc welding method of TIG (tungsten inert gas) welding in which an arc is generated from a tungsten rod having a very high melting point to a base material to melt the base material with heat. material. [0003] For example, JP-B-3948767 also discloses a technique of controlling the current waveform or voltage of high-frequency AC. This technique is used to improve the stability of the arc generated by TIG welding of thin sheets or thin-walled pipes made of low-melting metallic materials such as copper, aluminium, zinc, magnesium or alloys of these materials. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/06B23K9/32
CPCB23K9/092B23K9/23B23K2103/10B23K2103/12
Inventor 武田洋明森口启吾西尾成功
Owner DENSO CORP
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