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Plasma consumable electrode metal inert gas electric arc welding method

A plasma welding and inert gas technology, applied in plasma welding equipment, arc welding equipment, welding equipment, etc., can solve the problems of average value change, welding bead deterioration, etc., achieve good welding quality, prevent tissue deterioration and rupture. Effect

Inactive Publication Date: 2014-12-10
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as described above, if the pulse period Tf is changed by the frequency modulation control, the average value of the plasma welding current Iwp is also forcibly changed.
As a result, the weld bead deteriorates

Method used

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  • Plasma consumable electrode metal inert gas electric arc welding method
  • Plasma consumable electrode metal inert gas electric arc welding method
  • Plasma consumable electrode metal inert gas electric arc welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0108] In Embodiment 1 of the present invention, when the pulse cycle is changed by frequency modulation control of the inert gas shielded welding current, the second peak current value is feedback-controlled so that the value formed by the second peak current and the second base value current The average value of the plasma welding current is equal to the preset current setting value.

[0109] figure 1 It is a configuration diagram of a welding apparatus for carrying out the welding method of plasma inert gas shielded arc welding according to Embodiment 1 of the present invention. Hereinafter, each constituent will be described with reference to this figure.

[0110] This welding device includes a welding torch WT surrounded by a dotted line, an inert gas shielded welding power source PSM, and a plasma welding power source PSP. The welding torch WT has a structure in which a plasma nozzle 51 , a plasma electrode 1 b , and a power supply chip 4 are arranged concentrically w...

Embodiment approach 2

[0137] In Embodiment 2 of the present invention, when the pulse cycle is changed by frequency modulation control for the inert gas shielded welding current, the energization period of the second peak current is feedback-controlled so that the second peak current and the second base value current form The average value of the plasma welding current is equal to the preset current setting value.

[0138] The welding device used to implement the welding method of plasma inert gas shielded arc welding related to Embodiment 2 is the same as the above-mentioned figure 1 same. In addition, the module diagram of the inert gas shielded welding power supply PSM that constitutes the welding device is also the same as the above-mentioned figure 2 same. However, the block diagram of the plasma welding power supply PSP constituting the welding device is the same as the above-mentioned image 3 There are some differences in comparison, and the differences will be described below.

[013...

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Abstract

A plasma metal inert gas electric arc welding method comprises the steps of adopting the electrification of a first peak value current (Ipm) and the electrification of a first reference value current (Ibm) as a first pulse period (Tf) and repeating the push period to generate metal iner gas; turning on a second peak value current (Ipp) during a part of or the whole period of the electrification of the first reference value current (Ibm) and turning on a second reference value current (Ibp) during other parts of the push period (Tf) to generate plasma electric arc, wherein, the second peak value current (Ipp) or the electrification period (Tpp) of the second peak value current is controlled so as to make the average value of the plasma welding current (Iwp) formed by the second peak value current (Ipp) and the second reference value current (Ibp) equal to a prescribed current value. In this way, the plasma metal inert gas electric arc welding method making use of metal inert gas generated by a welding torch and plasma electric arc can prevent the tissues of the base material from deteriorating and breaking when a pulse form is applied in the welding current with the two kinds of electric arcs electrified and produce excellent welding quality.

Description

technical field [0001] The invention relates to a plasma MIG welding method, which adopts a welding torch to simultaneously generate a MIG (MetalInert Gas) arc and a plasma arc for welding. Background technique [0002] Conventionally, a plasma inert gas shielded arc welding method combining a plasma welding method and an inert gas shielded welding method has been proposed (see, for example, Patent Document 1). In this plasma MIGA welding method, the MIGA welding current is applied between the welding wire fed through the welding torch and the base metal, so that the MIGA arc is generated. . At the same time, a plasma arc is generated by supplying a gas such as argon gas so as to surround the welding wire, and passing a plasma welding current between the welding torch and the base material through the gas. The welding wire functions as an electrode that generates an inert gas shielded arc, and also assists joining of base metals by melting its tip to form a droplet. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K10/00
Inventor 小野贡平惠良哲生
Owner DAIHEN CORP