Device and method for measuring voltaic arc pressure distribution and current density distribution

Abstract

The invention relates to a device and a method for measuring voltaic arc pressure distribution and current density distribution, belonging to the technical field of voltaic arc testing. The device comprises a motor, a positioning frame, a guide rail fixed on the positioning frame, a sliding element mounted on the guide rail, a welding torch position regulating mechanism arranged at the lower end of the sliding element, a flat table surface arranged below the positioning frame, a container positioned on the flat table surface, anode plates arranged in the container, and a weighting sensor. During the measurement, the motor drives a guide screw to rotate so as to further drive a welding torch to move along a direction vertical to an insulating material. The values of voltaic arc force and voltaic arc current which are applied on the two anode plates are collected. Then, a mathematic model, which is about the value of the voltaic arc force and circle domain pressure distribution of the voltaic arc and about the value of the voltaic arc current and circle domain current density distribution of the voltaic arc, is established. Solving is carried out next. Then, curves about the circle domain pressure distribution and the circle domain current density distribution of the voltaic arc can be drawn. The device and the method realize the simultaneous measurement of the microcosmic voltaic arc pressure distribution and the microcosmic voltaic arc current density distribution. In addition, the device has a simple production process, and the testing steps are simple.

Description

technical field [0001] The invention belongs to the technical field of arc testing, and in particular relates to a device and a measuring method for measuring arc pressure distribution and current density distribution. Background technique [0002] The arc is a gas conductor between two electrodes. The ablation pits on the electrode surface were observed by high-speed camera and SEM scanning electron microscope, which showed that the arc was circular. Considering that the arc moves slowly and uniformly from left to right, the arc is little affected by the outside world. For an arc under uniform pressure, its cross section can be considered to be approximately circular. [0003] The arc pressure determines the surface shape of the molten pool. The distribution of the arc current density directly determines the distribution of the arc heat flux density. The distribution influences the geometry of the molten pool, the shape of the weld seam, the cooling characteristics of the...

AI Technical Summary

Problems solved by technology

The previous studies mainly focused on the measurement of the macroscopic arc pressure and current density, but there were not many studies on the microscopic arc pressure and current density distribution, and there was no device that could measure both the microscopic arc pressure distribution and the arc current density distribution. Therefore, It is of great practical significance to find a reasonable measurement method and invent a convenient and practical measurement device

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