Shaft surface repairing system and method for additive composite micro-rolling

Abstract

The invention relates to the technical field of additive shaft repairing, and provides a shaft surface repairing system and method for additive composite micro-rolling. The system comprises a frame, a plurality of groups of spinning units evenly distributed in the circumferential direction are arranged on the frame, and a middle wear shaft repairing area is constructed; each of the spinning units comprises a first driving device, a first guide rail, a first sliding block and a roller, wherein the first driving device and the first guide rail are fixed to the frame, an output end of the first driving device is connected with the first sliding block, the first sliding block is movably arranged on the first guide rail, the roller is connected with the first sliding block, and the roller surface of the roller is opposite to the circumferential surface of a wear shaft in the middle wear shaft repairing area; and a heating mechanism and an additive printing mechanism are arranged on the frame. According to the shaft surface repairing system for the additive composite micro-rolling provided by the invention, additive shaft repairing and micro-rolling of a repaired part are synchronously achieved, the microstructure and the mechanical property of the repaired shaft are comprehensively improved, the overall performance of the repaired shaft is improved, and the repaired shaft can be put into use again.

Description

technical field [0001] The invention relates to the technical field of additive shaft repair, in particular to a shaft surface repair system and method for additive composite micro-rolling. Background technique [0002] In large machines, shaft parts are an essential part, and during long-term use, there will inevitably be some surface wear or scratches, which will affect the normal use of the machine. Most of the shaft parts are expensive, so it is of great significance to repair the surface of the failed shaft parts. On the one hand, it reduces the cost of repairing the machine for the enterprise. On the other hand, by repairing the shaft instead of remanufacturing a new shaft, it greatly Improved resource utilization and cost savings. [0003] At present, domestic methods for repairing worn shafts mainly include arc surfacing, laser cladding, thermal spraying, and electroplating. Although the bonding strength of the repair layer by the spraying method is high, the defor...

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Problems solved by technology

[0003] At present, domestic methods for repairing worn shafts mainly include arc surfacing, laser cladding, thermal spraying, and electroplating. Although the bonding strength of the repair layer by the spraying method is high, the deformation is large, and it is not suitable for large-scale repairs; the arc surfacing method and the laser cladding method are essentially equivalent to the accumulation of welding on the surface of the substrate with high temperature, and relatively The technological process is relatively simple, so the arc surfacing method and laser cladding method are the most widely used in automatic repair.

[0004] However, during the implementation of the arc surfacing method and the laser cladding method, it is inevitable to have a corresponding thermal impact on the matrix of the shaft parts, and the structural changes and strength degradation in the heat-affected zone will directly affect the service of the shaft parts. Life and safety; In addition, the metallurgical quality of the surfacing layer or laser cladding layer is difficult to control, and it is easy to produce metallurgical defects such as pores and lack of fusion. These two factors make the overall performance of the repaired shaft unable to meet the requirements for re-putting into use. This severely restricts the reuse of shaft parts after repair

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