Sharp ridge repair method for automobile stamping mould

Abstract

The invention discloses a sharp ridge repair method for an automobile stamping mould. The sharp ridge repair method comprises the following steps: S01, carrying out molded surface analysis on the automobile stamping mould, and determining a repair area and repair amount of the automobile stamping mould according to an analysis result; S02, forming a groove in the repair area, carrying out burn repair welding in the groove, and filling the groove with a welding material; and S03, according to the repair amount determined in the step S01, carrying out mechanical processing on the repair area subjected to the burn repair welding, so that the molded surface of the repair area is restored to a designed molded surface. According to the sharp ridge repair method disclosed by the invention, molded surface analysis is carried out on the automobile stamping mould to determine a local repair area, and the repair for sharp ridges is completed by virtue of local burn repair welding and mechanical processing; and in comparison with current ways of re-spotting an automobile body sharp ridge stamping mould after copying the automobile body sharp ridge stamping mould or re-spotting the automobile body sharp ridge stamping mould after carrying out integral reduction milling on the mould or making two sets of same convex moulds, a backup of each other, for a new project mould, the cost is greatly reduced, and the repair period is shortened.

Description

technical field [0001] The invention relates to the technical field of automobile dies, in particular to a method for repairing sharp edges of automobile stamping dies. Background technique [0002] The Volkswagen Group adopted a unique sharp design at the beginning of this century, making the sharpness radius R of the characteristic ridgeline (that is, the characteristic line) of the car body close to 0 (hereinafter referred to as "car body sharp edge"), making the car more tough and Stylish, stylish and dynamic. This kind of sharp edge of the car body is manufactured by stamping with a stamping die with sharp edges, that is, the convex mold ridge line R of the mold is picked and milled to zero, and the concave mold is used to cooperate with the convex mold ridge line R for strong pressure forming, so that the stamping sheet is fully wrapped. The ridge line R forms an extremely sharp shape to achieve the sharp edge effect of body parts. [0003] There are the following pr...

AI Technical Summary

Problems solved by technology

[0003] There are the following problems in the actual production of sharp-edged stamping dies for car bodies: 1. The mold ridges in the sharp-edged forming area are too sharp, and they are easy to wear under high-speed and high-pressure stamping production conditions. The worn mold ridges will lead to changes in production status and The deterioration of the ridge line effect of stamping parts will be reflected on the whole vehicle, which will lead to quality problems such as blunt body ridge line and uneven ridge line sharpness.

2. Accidental damage to the sharp edge of the stamping die is unavoidable during the service life of the die (such as sundry pad damage, grinding damage, etc.)

However, the cost of the first two methods is too high (the cost is more than one million yuan), the cycle is long (the time is more than 10 months), and it is difficult to meet the production demand

Because after accidental damage occurs in the mold production process, it is necessary to complete the repair of the sharp-edged stamping mold for the body in a short period of time (within a week), otherwise it will cause major economic losses such as production stoppage; the third method has poor economy and high cost

[0005] In summary, how to solve the problem of high cost and long period of repairing the sharp edge of the stamping die for the sharp edge of the car body has become an urgent problem to be solved by those skilled in the art

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