Method for repairing automobile rolling mold

Abstract

The invention discloses a method for repairing an automobile rolling mold. The method incudes the steps that S1, a roller of the rolling mold is pretreated; S2, a laser device is fixed to a machine tool, fusion covering parameters of the laser device are set, a laser head of the laser device is set to make linear motion in the axis direction of the roller at a first set speed, the roller is set to rotate at a second set speed, and a powder feeder is set to feed selected alloy powder into a molten bath at a set powder feeding speed; and S3, a laser beam emitted out of the laser head is used for fusion covering of the alloy powder in the molten bath at a set layer number onto the surface of the roller, and the alloy powder uses CO2 gas as a carrier to be conveyed onto the surface of the roller. The laser device is used for fusion covering of the alloy powder onto the abrasion face of the roller so that the roller can be well repaired, and the problem that a roll-in roller cannot be used continuously after abrasion is solved. Moreover, the CO2 gas is used as the carrier, the air and the surface of the roller can be effectively isolated while the alloy powder is conveyed, and the repair quality is improved.

Description

technical field [0001] The invention relates to the technical field of repairing molds, in particular to a repairing method for an automobile rolling die. Background technique [0002] The roll forming process has the characteristics of small production investment, high efficiency, material saving, high product strength, high precision and stable quality. At present, many parts of automobiles are formed by rolling, such as automobile rear anti-collision beams, door sills, door top trim strips, door frame bright strips, seat slide rails, longitudinal beams with other sections of automobiles, upper door frames, glass There are also various rolling dies for guide grooves, door guide rails, gutter inserts, etc. However, the dies will inevitably wear out during use, and the cost of rolling dies is relatively high. The loss will also cause a waste of resources, so it is particularly important to repair the worn rolling die. [0003] In the prior art, most of the damages to the r...

AI Technical Summary

Problems solved by technology

[0004] (1) The accuracy of the surfacing welding process is poor, which is suitable for repairing damage with a large thickness, and the surfacing layer is very easy to form defects such as pores and inclusions

[0005] (2) A large amount of heat energy will be generated during the surfacing process, and the temperature of the roller itself will rise sharply. Excessive temperature gradients can easily cause deformation of the roller, which will affect the life of the roller twice, and the cost will increase accordingly

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