Plate material omnibearing locating structure and method in hot press forming technology

Abstract

The invention relates to the field of hot press forming and discloses a plate material omnibearing locating structure and method in a hot press forming technology. According to the omnibearing locating structure, a circular flanged hole extending out from the surface of a plate material (1) and integrated with the plate material (1), and the edge (11) of the circular flanged hole is higher than the plane where the plate material (1) is placed. When locating is needed, a pre-punched hole (12) is machined in a preset position of the plate material (1), then the pre-punched hole (12) is machined into the circular flanged hole, and then a locating pin (2) is inserted into the circular flanged hole to carry out omnibearing locating on the plate material (1). The circular flanged hole is a protruding hole relative to the plane of the plate material, so that when the plate material is located, only the locating pin with the same size and shape as the hole needs to be used, omnibearing locating can be carried out, the circular flanged hole cannot deform and be abraded easily, and locating is accurate.

Description

technical field [0001] The invention relates to the field of hot pressing forming, in particular to an omnidirectional positioning structure and positioning method for sheet materials in the hot pressing forming process. Background technique [0002] In the production process of thermoformed parts, the flat material is first punched into the required shape in the thermocompression die, and then the required product part edge contour and vacancy are obtained in the subsequent laser cutting / trimming die, so this time produces The requirements for the secondary clamping and positioning of hot-pressed parts are met. Moreover, during the inspection process of the hot-pressed parts stamped out by the hot-pressing die, the requirement for clamping and positioning of the hot-pressed parts on the inspection tool also arises. [0003] For clamping and positioning, there are usually three methods in the prior art. One method is to use only the shape of the part itself as the positioni...

AI Technical Summary

Problems solved by technology

The problem with this method is that it does not take into account the instability in the production process of the parts. In the production process of the parts, it is inevitable that there will be small changes in the size of the hot-pressed parts due to the wear of the mold or the change of the production environment. In the subsequent process of laser cutting / punching and checking tool inspection, the quality of the produced parts will be unstable due to the instability of the secondary clamping and positioning

The problem with this method is that in the process of using the ball stud to form the spherical convex hull, the ball stud is very easy to wear and cause the size of the spherical convex hull to change, and the spherical convex hull is prone to defects such as cracking and necking during the molding process , when the cracking is more serious, the material may fall off and become waste, which will cause great harm to the surface of the molding block of the mold; no matter what the above reasons cause the change in the size of the spherical convex hull, it will cause a second step in the subsequent process. Instability of clamping and positioning

This method is similar to the second method, but in this method, the V-shaped convex hull with a straight-line tip processed by the V-shaped breaking knife in the hot-pressed part can only be used in the secondary clamping process of the hot-pressed part The main positioning in a certain direction cannot be used as a 4-direction positioning, and the positioning accuracy and practicability are low

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