Arc tracking method for gas shielded welding based on arc swing

A gas shielded welding and arc technology, used in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of welding current jump, affecting arc stability, spatter, etc., to reduce the processing accuracy of welding parts, improve processing Flexibility, reducing the effect of signal mutation
CN103182589BActive Publication Date: 2015-10-21SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Publication Date
2015-10-21

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Abstract

The invention relates to an arc oscillation-based gas shielded welding arc tracking method which comprises the following steps that after the welding is started, a welding gun starts doing a periodic oscillation along a direction vertical to a weld joint; a current sensor carries out real-time sampling on a welding current; sampled data is filtrated; filtered data is subjected to deviation judgment and converted into deviation data; and the deviation data is converted into a movement command, and a weld joint track is compensated in real time through a deviation rectifying device. Because sampled signals are filtered by adopting software, the arc oscillation-based gas shielded welding arc tracking method is high in response speed and tracking precision; and due to the adoption of a dual-filtering mode, the signal mutation caused by instable arc is reduced, the deviation compensation dosage is calculated by using known welding parameters, the support of a database or expert system is not needed, the requirement of a welding device on a weldment processing precision is lowered, and thus the arc oscillation-based gas shielded welding arc tracking method is an effective means for realizing the flexible automatic welding.
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Description

technical field

[0001] The invention relates to a gas shielded welding arc tracking method based on arc swing, which is used to solve the problem of path deviation between welding torch trajectory planning and actual welding bead. Background technique

[0002] As an important technology of welding automation equipment, weld seam tracking mainly solves the problem of welding torch movement trajectory deviation caused by positioning accuracy, weldment processing accuracy, weldment size repeatability and thermal stress during welding. The general mechanical tracking accuracy is relatively low, and the tracking probe wears seriously due to the influence of the surface roughness of the weldment. Laser visual tracking with relatively high precision is easily affected by smoke and dust in the welding process, and the image collector is easily interfered by welding arc light. In addition, both of these two tracking methods require an additional tracking device at the end of the wel...

Claims

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