A Method of DC Controlling Magnetic Monopole Rotation for Segmented Arc Control

Abstract

The invention provides a method for controlling a magnetic monopole through DC to rotate to conduct segmented arc control. The method is mainly used for solving the technical problems that a magneticfield is controlled unstably through exciting current, the requirement for a magnetic material is high, the electric arc behavior is difficult to control to make the swinging track of the electric arcindefinite, the scanning range is small and tracking is inaccurate due to the fact that little effective information of weld joints is acquired in the prior art are solved. According to the technicalscheme, the method is characterized in that the monopole of the magnetic field is controlled through DC to conduct segmented rotating around a welding gun shaft; an expected track of circumferentialswinging of the electric arc is equally divided into multiple segments of small-radian intervals. Within each small-radian interval, a longitudinal magnetic field with a declination angle with the welding gun shaft is manufactured through DC to make the electric arc rotate and deviate from the axis, and then the electric arc is pulled to conduct small-radian swinging through the magnetic field. Movements of the electric arc within all the intervals are combined to achieve circumferential swinging. Weld joint information is acquired to achieve automatic tracking on the weld joints by measuringchange of welding current when the electric arc swings circumferentially in different positions.

Description

technical field [0001] The invention specifically relates to a method for realizing unipolar rotation of a magnetic field by using direct current to control the self-rotation and circular swing of a welding arc, which belongs to the field of welding automation. Background technique [0002] The welding arc is composed of a variety of different charged particles, and when the velocity direction of the charged particles has an angle with the direction of the magnetic field, it will be subjected to Lorentz force, and the direction of Lorentz force is always perpendicular to the direction of particle velocity, so it can be The magnetic field is used to change the motion of the particles without changing the speed of the particles, and does not do work on the charged particles, so the traction can be realized. [0003] At present, the methods of external magnetic field include: single transverse magnetic field, longitudinal magnetic field, transverse and longitudinal bidirectiona...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods of external magnetic field include: single transverse magnetic field, longitudinal magnetic field, transverse and longitudinal bidirectional magnetic field, mechanical transverse rotating magnetic field, etc. Alternating current is generally used to control the magnetic field, and the direction of the magnetic field is changed by changing the direction of the current , has high requirements on magnetic materials. When the direction of the magnetic field is changed rapidly, the Lorentz force will also change immediately. However, due to the inertia of the arc and air resistance and other factors, it is often difficult to control the behavior of the arc; while the multi-directional magnetic field intersection control, In welding seam tracking, the force on the particles is complicated, the shape of the arc and the trajectory of the arc are not easy to control, it is difficult to obtain more effective welding seam information, and the tracking accuracy is not high; the mechanical rotating device is complex, Energy-intensive and difficult to control

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