Automatic welding and trimming device and method for longitudinal bars of box girder

By using an automatic welding and trimming device for longitudinal reinforcement of box girders, combined with fixed and mobile welding machines, automated welding and trimming of steel bars has been achieved. This solves the problem of manually cutting and removing weld beads after welding in existing technologies, improving efficiency and quality, and reducing labor intensity.

CN121776641APending Publication Date: 2026-04-03COMMUNICATIONS CONSTRUCTION CO OF CSCEC 7TH DIVISION CORP LTD +3
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Patent Information

Application Number
CN202610071806.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-20
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

In existing technologies, steel bars need to be manually cut and weld beads removed after welding, which is complicated, inefficient, labor-intensive, and the quality is affected by incomplete cleaning.

Method used

Design an automatic welding and trimming device for longitudinal reinforcement of box girder, including a feeding mechanism, a welding mechanism and a trimming mechanism. It utilizes a combination of fixed and mobile welding machines, and achieves automated welding and trimming through translation and lifting control. It is equipped with a trimming head to remove weld beads from the top and bottom. The integrated control system enables intelligent operation.

Benefits of technology

It has realized the fully automated process of steel bar welding, improved production efficiency, reduced labor intensity, ensured welding quality and safety, thorough and uniform finishing, and reduced manual operation steps.

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Abstract

The invention relates to an automatic welding and trimming device and method for box girder longitudinal bars. The automatic welding and trimming device comprises a feeding mechanism, a welding mechanism and a trimming mechanism. The welding mechanism comprises a fixed butt welding machine, a movable butt welding machine, a rail and a translation driving cylinder; the finishing mechanism comprises an upper telescopic cylinder, a lower telescopic cylinder, an upper finishing head and a lower finishing head; the upper telescopic cylinder and the lower telescopic cylinder are correspondingly fixed to the upper portion and the lower portion of the machine shell and fixedly connected with the upper trimming head and the lower trimming head respectively, the upper trimming head and the lower trimming head are provided with upward clamping grooves and downward clamping grooves respectively, and the clamping grooves correspond to the clamping grooves of the upper clamp and the lower clamp in the vertical direction. The trimming structure is arranged on the movable butt welding machine, the trimming structure is combined with the translation driving structure of the movable butt welding machine to cut off the tumor formed after butt welding, the trimming structure has the advantages of being good in cutting effect, good in cutting completeness, easy to operate, small in improvement difficulty and low in maintenance cost, the welding seam precision and the welding quality are guaranteed, and the welding quality is improved. And the advantages of butt welding and beading removal and the like are integrated.
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