Method for welding hydraulic support fillet weld through robot in large fusion depth mode

Abstract

The invention provides a method for welding a hydraulic support fillet weld through a robot in a large fusion depth mode. The method comprises the following steps that S1, a bottom plate and a vertical plate of a hydraulic support are spliced into the fillet weld; S2, offline programming or field programming teaching is conducted on the welding robot; S3, the large fusion depth function of the welding robot is started, the included angle between a welding gun of the welding robot and the bottom plate is adjusted to be 30-40 degrees, and compressed arc large fusion depth bottoming welding is conducted; and S4, the included angle between the welding gun and the bottom plate is adjusted to be 45 degrees, and filling cover face welding is conducted. The method for welding the hydraulic supportfillet weld through the robot in the large fusion depth mode has the advantages of being high in welding efficiency, good in fillet weld root fusion degree, high in welding quality and low in weldingcost.

Description

technical field [0001] The invention relates to a welding method, in particular to a method for a robot to weld a fillet weld of a hydraulic support with a large penetration depth. Background technique [0002] As the main supporting equipment in fully mechanized coal mining equipment, hydraulic support has the characteristics of large volume and weight, poor service conditions, many box-shaped welding structures, complex welding seams, and large welding volume. Each component of the hydraulic support is a box-type structure composed of medium and thick plates. The general box is composed of a bottom plate, a vertical plate and a cover plate. Most of the welds between the bottom plate and the vertical plate are fillet welds. larger. At present, the welding method of fillet weld is multi-layer multi-pass welding by gas shielded welding. The welding volume is large, the penetration depth is shallow, and the welding efficiency is relatively low. With the advancement of techno...

AI Technical Summary

Problems solved by technology

At present, the welding method of fillet welds is multi-layer and multi-pass welding by gas shielded welding, which has large welding volume, shallow penetration depth and relatively low welding efficiency.

With the advancement of technology, welding robots have been applied in batches in the welding process of hydraulic supports. In order to ensure the quality of the forming, the welding torch needs to divide the welding angle equally when the robot welds the fillet weld (that is, the angle between the welding torch and the bottom plate and the vertical plate is equal to 45°), which leads to too small effective penetration depth of the weld between the bottom plate and the vertical plate. When the strength is checked, the stress area of ​​the weld is equal to the minimum cross-sectional area of ​​the weld fillet. In order to meet the strength requirements, only By increasing the welding angle, however, increasing the welding angle will directly lead to a double increase in welding workload and low overall efficiency

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