Grinding and polishing process for repair of aluminum alloy hub

Abstract

The invention discloses a grinding and polishing process for repair of an aluminum alloy hub. The process includes the steps of S1, trimming and reshaping; S2, rough grinding; S3, packing; S4, accurate grinding; and S5, polishing. In the step S1, a scratched part of the hub or a protrusion at a welding repair part is trimmed to form a required model by an aluminum file or a grinding head; in the step S2, dry abrasive paper from number 80 to number 400 is successively selected to grind and trim the surface preliminarily; in the step S3, whether pores and pits exist in the ground surface is examined, and unsaturated resin putty or aluminum putty is used for filling the pores and the pits; in the step S4, for the trimmed surface with a curved surface examined to be qualified, waterproof abrasive paper from number 400 to number 800 is selected for modifying grinding in a skipping mode; and in the step S5, on the basis of accurate grinding, waterproof abrasive paper from number 1200 to number 2000 is further selected for grinding layer by layer in the order from thick to thin until scratches and grinding traces of the abrasive paper of the upper layer cannot be seen, and finally a polishing agent and a polishing wheel are used for polishing operation until the mirror surface effect is formed. According to the process, polishing treatment is carried out for repairing the aluminum alloy hub after rough grinding and accurate grinding, and therefore the surface of the aluminum alloy hub can have the mirror surface effect, and the repair effect is good.

Description

technical field [0001] The invention relates to the technical field of repairing aluminum alloy wheels, in particular to a grinding and polishing process for repairing aluminum alloy wheels. Background technique [0002] Aluminum alloy wheels are more and more used in various automobiles because they have many excellent characteristics compared with steel rims, such as: wheels of the same specification can reduce a lot of weight; they have sufficient strength and are not easy to corrode ; Die-casting molding process is simple, can be designed into any shape to meet people's aesthetic requirements and so on. [0003] But precisely because of the high aesthetics of the aluminum alloy wheel, people can't tolerate it with a little flaw in appearance, and often replace it with a little scratch or slight deformation. [0004] But everyone knows that the aluminum alloy wheel hub is not only an appearance part for decoration, but also an important part that determines the safe driv...

AI Technical Summary

Problems solved by technology

However, the surface of the aluminum alloy wheel is damaged. For example, the main structure is not damaged, but the surface and the edge are physically damaged due to collision and corrosion, which cannot be repaired according to the existing motor vehicle maintenance technology. If re-melting and casting will waste a lot of metal, heat, electricity, etc. Social resources such as manpower

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