Control method and device for rocking arc narrow gap welding system

Abstract

The invention discloses a control method and device for a rocking arc narrow gap welding system. The rocking arc narrow gap welding system consists of a welding torch and a controller which are connected with each other, wherein the controller is provided with two singlechips which are connected with each other; a parameter setting button is used for selecting a parameter type to be set; a first singlechip is used for periodically setting different rocking process parameters and transmitting the set different rocking process parameters to a second singlechip; a photoelectric switch is used for inputting a middle point electric signal of a detected reciprocating circular-arc rocking track to the second singlechip; after a control signal output by the second singlechip is transmitted to a first photoelectric isolating circuit, a driving controller is used for controlling a hollow shaft motor to drive a welding wire to rotate around a central axis, and a rocking middle point before welding of the welding wire is positioned automatically; and the second singlechip is used for controlling an arc to rock along the reciprocating circular-arc rocking track or a unidirectional circumferential rocking track in a groove to be welded. The advantages of double-singlechip control are brought into play, a control circuit is simple, digital high-accuracy control is realized, and the narrow gap welding requirement on a multi-position welding seam is met.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method and device for controlling a shaking arc narrow gap welding system. Background technique [0002] Narrow-gap MIG welding uses gas as the protective medium, does not need to remove slag after welding, and has moderate heat input and good manufacturability. It is an advanced welding technology with high efficiency, high quality and low cost. How to ensure uniform and stable penetration on both sides of the groove of the workpiece to be welded is one of the key technologies to achieve high-quality narrow-gap MIMA welding. To this end, a variety of new narrow-gap melting electrode welding processes have been developed at home and abroad, among which the representative ones are: twist wire welding method, serpentine wire welding method, high-speed rotary arc welding method, etc. These new processes have solved to a certain extent the problem of poor fusion of the two sidewa...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose a method for digitally and accurately controlling the shaking arc narrow gap welding system by using a single chip microcomputer to overcome the defects of single arc shaking trajectory of the existing narrow gap welding torch and low control precision of the controller. A device for realizing the control method is also proposed. The arc shaking track can be either a reciprocating arc-shaped shaking track or a one-way circular shaking track.

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