Remelting device

Abstract

The invention discloses a remelting device, which comprises a workpiece bearing structure, a position regulating mechanism movably arranged relative to the workpiece bearing structure, and a remelting structure arranged on the position regulating mechanism. The workpiece bearing structure is used for bearing a workpiece with a coating layer on the outer surface; the position regulating mechanism drives the remelting structure to feed along a first direction of the workpiece so as to enable the remelting structure to carry out remelting treatment on different remelting positions in the first direction of the workpiece; the remelting structure comprises two remelting parts or more arranged at an interval along the first direction. According to the remelting device provided by the invention, through arranging two remelting parts or more, when the position regulating structure drives the remelting structure to arrive at one feeding position so as to carry out remelting treatment on the workpiece, multiple remelting layers can be formed on the coating layer of the workpice. Compared with the prior art, the processing efficiency of remelting treatment is improved.

Description

technical field [0001] The invention relates to the technical field of remelting, in particular to a remelting device. Background technique [0002] Thermal spraying technology is a key technology in the field of surface engineering, which is widely used in the manufacture and repair of industrial parts with special performance requirements. However, the spray coating has a typical layered structure, and there are tiny voids in the interior to varying degrees, and it is mainly mechanically bonded with the substrate, which limits the wear resistance and impact resistance of the spray coating, and cannot be applied to heavy loads and impact forces. Large harsh conditions. In order to improve the comprehensive performance of the spray coating, the spray coating is usually remelted. [0003] Tungsten argon arc remelting technology is one of the commonly used technologies for spray coating remelting treatment. It has the characteristics of low equipment cost and processing cost...

AI Technical Summary

Problems solved by technology

But because the remelting device is only provided with an argon arc welding torch 58 ', so the remelting device in the prior art can only carry out single pass remelting process to the workpiece, so the sprayed coating of the workpiece is used in the remelting device of the prior art When carrying out a comprehensive remelting process, the argon arc welding torch 58' needs to be driven by the beam 3' to move and stay at different positions in the Y direction step by step and carry out remelting treatment, so the processing efficiency is low

[0004] In addition, the inventors found that when using the remelting device in the prior art to remelt the sprayed coating, on the one hand, the diameter of the continuous arc spot formed between the tungsten electrode of the argon arc torch 58' and the sprayed coating of the workpiece is relatively small , resulting in a narrower effective width of the single-pass remelted layer obtained by remelting treatment; on the other hand, due to the uneven distribution of pores inside the sprayed layer, there is a large difference in the heating uniformity of the sprayed layer during remelting, resulting in the single-pass remelted layer. uneven width

Therefore, when using the remelting device in the prior art to carry out remelting treatment on the sprayed layer of the workpiece for multiple overlapping, it is easy to cause inconsistent overlapping amounts at different positions. , leading to insufficient melting of the sprayed coating, that is, the internal pores failed to precipitate in time, and then formed crack sensitive sources and eventually produced cracks and other defects, which could not meet the process requirements of large-area remelting treatment of the sprayed coating on the surface of the workpiece

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