Device for measuring current density of arc column of welding arc

Abstract

The invention discloses a device for measuring the current density of an arc column of a welding arc. The device comprises two anode plates which are separated, wherein cooling water channels are formed in the two anode plates; grooves are formed at the joints of the two anode plates respectively; the inner wall of each groove is provided with an insulating layer; a tungsten probe is clamped in the two grooves of the two anode plates; and a part of the tungsten probe extending out of the lower sides of the anode plates is connected with a current divider through a lead-out lead. In the invention, two water-cooled copper polar plates are provided with semi-cylindrical grooves, Al2O3 plasma coatings are coated in the grooves, the tungsten probe is clamped between the two water-cooled copper polar plates, a lead is connected below the probe, and the probe is connected to a welding power supply after being connected with the current divider; and during measurement, a motor is used for driving a lead screw to rotate, the lead screw is used for driving a slide block and a welding gun to move horizontally, and an electric arc and the probe move relatively, so that the aim of measuring is fulfilled. Due to the adoption of the device, the current density of the arc column of the welding arc can be measured continuously, and the radial distribution condition of the current density along with the arc column of the electric arc can be obtained; and the device has a simple structure and high result accuracy.

Description

【Technical field】 [0001] The invention belongs to the field of physical measurement of welding arc, and in particular relates to a non-melting electrode gas shielded welding arc current density measuring device. 【Background technique】 [0002] Since the emergence of modern welding technology at the end of the 19th century, there has been great progress in both the welding method and the welding process. Because welding has the advantages of convenient forming, strong adaptability, and relatively low cost, it has penetrated into almost all parts of the world. all aspects of industry. With the development of mechanization and automation, today's various industries have put forward higher requirements for welding quality, especially high-tech industries such as aviation, aerospace and national defense. In terms of welding applications, arc welding is dominant, so the research on arc welding has never been interrupted. [0003] Welding arc is a form of gas discharge. As a weld...

AI Technical Summary

Problems solved by technology

The split anode calculation method has relatively low requirements for high temperature and insulation to a certain extent, but this method is based on the assumption that the arc section is circular. Although it is reasonable to a certain extent, it has poor versatility

And it is difficult to ensure that the arc cross section is circular in actual working conditions

In addition, there is error accumulation, which makes the error of the calculation result large

The probe method can obtain accurate measurement results more intuitively, but it faces two major problems: high temperature (melting the probe) and insulation (between the probe and the anode plate)

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