Laser remanufacturing processing method for automobile stamping die

Abstract

The invention provides a laser remanufacturing processing method for an automobile stamping die. The laser remanufacturing processing method comprises the following steps: step I, pretreating the integral material of the die; step II, detecting practical hardness of die base metal; step III, performing powder selecting on the die according to working condition requirements; step IV, opening a switch on a nitrogen gas cylinder to detect powder; step V, starting a powder feeding button of a powder feeding machine to perform powder feeding and focusing; and step VI, regulating gas pressure of protective gas. In case of not changing the basic hardness (HRC30-40) of the die, a novel laser cladding repair technology is adopted to treat, so that the die surface hardness can reach HRC55-60, wear resistance is strengthened, corrosion resistance is strengthened, the service life of the die is prolonged, a processing period of repair ways such as a conventional repair-welding way is shortened, and manpower, financial and material resources are saved.

Description

technical field [0001] The invention belongs to the processing field of automobile stamping dies, and in particular relates to a laser remanufacturing treatment method of automobile stamping dies. Background technique [0002] Automobile molds play a vital role in the field of automobile manufacturing, and the quality of automobile molds directly determines the quality of products. Improving the service life and use accuracy of automobile molds and shortening the manufacturing cycle of automobile molds are technical problems that many companies need to solve urgently. Even broken and other failure forms. Therefore, the remanufacturing and repairing of automobile molds is also necessary. There are many methods for remanufacturing and repairing automobile molds, such as electric discharge process, argon arc welding repair, welding repair, and brush plating. [0003] Using the above repair methods to repair will lead to large welding heat affected area, large solder joints, ...

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Problems solved by technology

[0003] Using the above repair methods to repair will lead to large welding heat affected area, large solder joints, long repair cycle, heavy workload, high cost, waste of resources and complicated repair process. For example, the common repair welding repair process includes: welding repair Pre-finishing, organic solvent degreasing, surfacing bottom layer, surfacing middle layer, surfacing working layer, post-welding trimming, polishing

[0004] Especially for Cr7V-L hot stamping mold material, the actual hardness of the mold is between HRC30-40 before repairing, the hardness required for repairing is between HRC50-55, and the repairing thickness is between 1.2-1.5mm. The mold material is The materials imported from Germany, because of a lot of wear and tear during long-term use, lead to shortages in key areas such as the mold surface and sharp corners, and the size of the stamped and formed parts is unqualified, resulting in batch scrapping of parts; it takes a long time to remake the mold , the waste of resources is serious, the loss cost is too high, and the conventional repair welding and surfacing repair methods are too heavy, the heat-affected area is large, and the repair amount is not easy to control, and the repair process is too complicated

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