Gantry type multiheaded automatic welding machine

Abstract

The invention relates to stiffener welding equipment of a beam and slab unit of a steel box of a bridge steel structure, which provides a gantry-typed multiple operator automatic welder and comprises a gantry, a travel driving system, a gas protective welder, an electric control system, a power supply and a gas supplying system; the invention is characterized in that a moveable cross beam is arranged between frame beams at the left side and right side of the gantry; a plurality of vertical steering sliding plates are arranged on the moveable cross beam and are provided with welding seam tracking devices; a welding gun of the gas protective welder is arranged in the welding seam tracking device; the welding is carried out along with the tracking movement of the welding seam by the welding seam tracking device; therefore, the welding seam tracking device adopts a spherical surface tracking wheel mechanism. By adopting the gantry-typed multiple operator automatic welder, the quality problem of forming difference of the welding seam caused by different vibration when in welding due to different lengths of cantilevers in the existing multiple operator welder; simultaneously, the tracking precision of the welding seam is improved greatly, the welding quality of products is guaranteed and the welding efficiency is improved by 3 times to 4 times.

Description

technical field [0001] The invention relates to the technical field of manufacturing and welding of bridge steel structure steel box girder plate unit elements, in particular to seam welding equipment for bridge steel structure steel box girder plate unit elements. Background technique [0002] Most bridge steel structure manufacturing enterprises still use the single seam welding mode of multi-person and multi-machine single seam welding in the U-shaped rib welding of steel box girder plate unit elements. Since each seam welding cannot be welded simultaneously, in the same direction, and with the same technical parameters The shrinkage of the weld seam is different, the welding deformation of the plate unit is difficult to control, the quality is poor, the correction workload is large, and the work efficiency is low. At present, the general-purpose gantry-type multi-head welding machine has been used by enterprises for the welding of U-shaped ribs of steel box girder plate ...

AI Technical Summary

Problems solved by technology

[0002] Most bridge steel structure manufacturing enterprises still use the single seam welding mode of multi-person and multi-machine single seam welding in the U-shaped rib welding of steel box girder plate unit elements. Since each seam welding cannot be welded simultaneously, in the same direction, and with the same technical parameters The shrinkage of the weld seam is not the same, the welding deformation of the plate unit is difficult to control, the quality is poor, the correction workload is large, and the work efficiency is low

At present, the general-purpose gantry-type multi-head welding machine has been used by enterprises for the welding of U-shaped ribs of steel box girder plate units, but because the general-purpose gantry-type multi-head welding manipulator has only one fixed beam, and the sub-boat welding of plate units has a certain inclination angle As a result, the descending heights of the vertical slides of multiple welding heads are inconsistent, and different cantilever lengths cause different vibrations during welding, resulting in differences in weld formation

In addition, the existing gantry-type multi-head welding manipulator generally uses parallel double-wheels or crossed double-wheels to track the weld seam. When there is an error in the plate unit component, either it cannot be effectively tracked, or the automatic tracking accuracy cannot meet the requirements, resulting in weld seam tracking. Poor seam formation cannot meet welding process requirements

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