Positioning dowel pin hole pairing auxiliary tool for automobile stamping die machining

Abstract

The invention belongs to the technical field of automobile die manufacturing, and discloses a positioning dowel pin hole pairing auxiliary tool for automobile stamping die machining. The positioning dowel pin hole pairing auxiliary tool comprises a workpiece and a fixed cylinder, the outer surface of the fixed cylinder is provided with supporting mechanisms, the top of the fixed cylinder is movably sleeved with a cross-shaped column, the top of the cross-shaped column is provided with a top disc, a driving disc is fixedly installed at the bottom of the cross-shaped column, and the outer surface of the cross-shaped column is movably sleeved with a connecting spring. According to the positioning dowel pin hole pairing auxiliary tool, a lower pushing block is driven to move upwards, synchronous opposite movement of an upper pushing block and the lower pushing block is finally achieved, an inner plate is extruded to be pushed outwards, then moving columns and an attaching plate are driven to move outwards, and the outer side face of the attaching plate is attached to the inner wall of the dowel pin hole, so that the center of the dowel pin hole is accurately positioned through a diameter-variable concentric circle formed by a positioning and grinding mechanism, the grinding effect is better, and the grinding position is more accurate.

Description

technical field [0001] The invention belongs to the technical field of automobile mold manufacturing, in particular to an auxiliary tool for positioning pin hole matching for automobile stamping mold processing. Background technique [0002] Automobile stamping die refers to the stamping die used to process auto parts. It is used to manufacture metal parts of automobiles, such as the entire shell of the car door. In the processing of the workshop, it is usually necessary to cut a single small workpiece with high precision for the positioning pin hole. The positioning pin hole refers to the hole used for positioning and calibration between the workpieces. The precision is high. Generally, the positioning pin is used to clamp the two workpieces. Hold and position, and then fix it with bolts. After the joint pin hole is cut, it usually needs to be adapted and matched with a pin, so that the pin just penetrates into the general depth of the joint pin hole. [0003] At present, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the matching of pin holes usually relies on manual pairing with pins to judge whether the size of the pin holes meets the standard, but because the machine and parameters will change according to the wear and tear, the processed pin holes sometimes become smaller. As a result, the pins cannot fit in. At this time, the staff will use a slender file and sandpaper to polish the inner wall of the pin hole to expand the size of the pin hole. However, due to the insufficient manual grinding, it will cause the pin hole The center point of the center point is offset, resulting in the loss of positioning function, resulting in the failure of subsequent mold installation

[0004] When the size of the joint pin hole is too small and does not meet the standard, the staff will use common sandpaper for grinding, not only with little effect, but also cause injury when the hands come into contact with the metal workpiece, especially when the staff is grinding with sandpaper When the sandpaper is in contact with the hand, it will cause wear and damage to the human hand, which is time-consuming and labor-intensive, and there are potential safety hazards

[0005] In the prior art, workers generally do not control the strength well when polishing the joint pin holes, resulting in the size of the joint pin holes being enlarged at once, directly causing the workpiece to be scrapped, because during processing, the size of some joint pin holes It's just a little bit small, and manual grinding is easy to over-grind, and the accuracy of grinding and polishing cannot be guaranteed

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