Finished piece positioning method for grinding die of automobile outer cover panel

Abstract

The invention relates to a finished piece positioning method for a grinding die of an automobile outer cover panel, transition process holes are adopted in the grinding die of the automobile outer cover panel, and the method is implemented through the following steps: 1) punching two transition process holes on the non-A type surface of a finished piece after grinding stably, wherein the positions of the transition process holes are arranged in the non-exposed area of the finished piece and are not arranged in the waste material area of the next process step; 2) punching at least two positioning process holes on the A type surface of the finished piece after utilizing the transition holes on the non-A type surface for grinding, wherein the panel punched with the transition process holes can not be trimmed off when the positioning process holes are punched; and 3) adopting the processing process holes for grinding in all the following process steps, wherein the punching of the transition process holes and the positioning process holes adopts special pins for the positioning process holes, and the position precision is + / -0.1mm. The finished piece positioning method has the advantages that by adopting the processing method adopting the transition process holes in the grinding die of the automobile outer cover panel, the consistency and accuracy of the grinding reference of the outer panel can be ensured, and the defects in the surface quality of the outer panel caused by the process holes of the grinding die can be simultaneously avoided.

Description

technical field [0001] The invention relates to stamping technology of automobile cover parts, in particular to a method for positioning parts used for researching molds of automobile outer cover parts. Background technique [0002] In the debugging process of stamping dies for automobile outer panels, two positioning process holes (CH holes for short) are usually used. This positioning method has been used for a long time, and it plays an extremely important role in the process of mold debugging. . The positioning process hole is not the hole on the final stamping part required by the user, but the process hole used in the production process for debugging the mold. When the CH hole is used for positioning, grinding and testing, it can ensure that the profile between the various processes of the mold is consistent with the benchmark. In fact, this positioning method is based on the workpiece transfer reference, avoiding the displacement of the surface caused by the simple ...

AI Technical Summary

Problems solved by technology

However, in the debugging process of some outer plate parts, it is impossible to avoid setting CH holes on the key exposed surface of the product, also known as the A-type surface. If it is blocked after debugging and grinding, it will cause noodle defects at the corresponding position

At present, our usual method is to make the CH hole on the die, and the hole is not punched out, but the part is placed in the drawing die and drilled with a radial arm, so it is difficult to ensure the accuracy of the CH hole , resulting in the inability to accurately transmit the grinding benchmarks of each process of the workpiece during the mold grinding process

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