KR950005435A - Consumable-electrode arc welding method and apparatus for its implementation - Google Patents

Abstract

The present invention provides a fixed positioning at any location in space that can provide uniform power dissipation per unit weld width and reduce the rate of defects during welding, taking into account the width of the area of the article to be welded, thereby improving the quality of the weld point welded. It is an object of the present invention to provide a method for electric arc welding a metal using a consumable-electrode and an apparatus for performing the same. To achieve the above object, the present invention uses a consumable-electrode fixed at an arbitrary position in space. In the method of arranging an insulating electrode between the parts of the article to be welded and supplying and pressurizing the supply voltage to both the insulating electrode and the article to generate an arc current, the electric arc welding method of the metal. In the arc motion of 2 cycles, it is modulated to a frequency corresponding to the fluctuation of the arc itself frequency over the weld width, Providing a consumable-electrode arc welding method, characterized in that the maximum arc current is set in the middle of the welding width, using fixed consumable electrodes positioned anywhere in space, and installing the welded article portions therebetween. An electric arc of metal comprising a clamping fixture in which an insulating electrode is disposed, a thyristor source of arc current equipped with an arc current controller, and a phase control circuit of a thyristor, the leads of which are respectively connected to the article portions to be welded with the insulating electrode. In the welding apparatus, the arc current controller provides a consumable-electrode arc welding apparatus, characterized in that it is in the form of a modulator that provides the maximum arc current in the middle portion of the welding width during every 1/2 cycle of arc motion. .

According to the present invention, it is possible to provide power dissipation per uniform width per unit welding width by the modulation type determined depending on the welding width and the modulation frequency selection of the arc variation over the welding width, and as a result, the welding quality is improved.

Description

Consumable-electrode arc welding method and apparatus for its implementation

Since this is an open matter, no full text was included.

1 shows an apparatus for electric arc welding of metal using a consumable-electrode according to the invention,

2 is a cross-sectional view of an electrode plate at a fixed moment of welding when a large thickness metal structure is electric arc welded using a fixed consumable electrode.

3 a and b illustrate two possible welding current change dependences on the arc position on the edge of the electrode-plate.

Claims (3)

It uses fixed consumable-electrode placed at any place in space, arranges the insulating electrode between the parts of the article to be welded, and provides the supply and pressurization of the power supply voltage to both the insulating electrode and the article to generate arc current. In the electric arc welding method, the welding current is modulated at a frequency corresponding to the fluctuation of the arc self frequency over the welding width in every half cycle of the arc motion, and the maximum arc current is set at the middle of the welding width. Consumable-electrode arc welding method characterized in that the. Clamping fixtures using fixed consumable-electrodes placed anywhere in space, with welded article portions and insulated electrodes disposed therebetween, thyristor sources of arc current equipped with arc current controllers, and leads In the electric arc welding apparatus of a metal including a phase control circuit of a thyristor connected to an insulated electrode and an article portion to be welded, the arc current controller is an intermediate portion of the welding width in every half cycle of the arc motion. A consumable-electrode arc welding device, characterized in that it is in the form of a modulator providing a maximum arc current to the device. 3. The modulator of claim 2, wherein the modulator has an optronic digital converter, a master oscillator, adjustable frequency separation, a reversible counter, an amplifier-integrator, and a lead connected to the input of the control resistor of the thyristor source of arc current. And a transducer connected in series, and an input of the optronic digital converter is connected to a phase control circuit of a thyristor of an arc current source. ※ Note: The disclosure is based on the initial application.