Some of the surface quality problems of automotive stamping parts are burr. The reason for this is the mold edge of the wear and tear, need to re-grinding mold to ensure sharp edge. The following is the stamping die in the production process often problems and solutions:

First, the size of ultra-poor

Size tolerance is the most common product quality defects, it is a serious flaw defects. First check the mold design, remove these reasons. If the tolerance size and material thickness, should be measured material thickness and material, hardness.

Solution:

Stamping production of high cost of mold. Usually die costs the total cost of the workpiece 1 / 5-1 / 4. Because the mold manufacturing difficult, high cost. Put into production after the mold repair and grinding maintenance costs are high, while the original mold cost only about 40% of the cost of the mold. Timely maintenance of molds can reduce stamping production of mold costs.

Second, the surface quality is not qualified　Surface quality problems are mainly burr. Cause it is the mold edge of the wear and tear, need to re-grinding mold to ensure sharp edges. Followed by convex, concave mold intermittent unreasonable, replace the material or increase the gap.

Solution:

Mold grinding wear must be based on the edge of the face and the side of the actual wear and tear conditions, in addition, should also consider the material thickness, die shape structure and grinding order and other related factors.

1, the main reason for the mold is a poor mold orientation, tilt or between the template foreign body, so that the template can not be flat;

2, mold strength design is not enough or uneven force caused by mold deformation;

3, the mold is not allowed to install, the upper and lower mold positioning error tolerance or poor accuracy of the press, so that mold interference;

4, the strength of the punch is not enough, the size of the punch position too close, so that the lateral force of the mold imbalance.

Solution:

When the mold is used, parts are installed in the wrong direction or direction. The work height adjustment is too low, the guide column lubrication is insufficient. Feeding equipment failure, press abnormalities, etc., will cause damage to the mold. If there is foreign body into the mold, parts overlap, waste blockage and other conditions are not dealt with in time to continue processing production, it is easy to damage the mold blanking board, punch under the template and guide column.