1, die damage

sheet metal arc processing die damage refers to die cracking, fracture, swelling, etc, to solve the problem of mold damage, it is necessary to find the reason from the mold design, manufacturing process and mold application level. If the foreign matter enters the mold, the product overlaps, the waste infarction and other conditions are not properly handled, and the processing and production are inherited, the blanking plate, punch, lower template and guide post of the mold will be easily damaged.

The spring force design is too small or the height of the contour sleeve is not equal, which will cause the torsion spring to rupture and the blanking plate to tilt. This results in repeated impacts, damaging the components. If the quenching temperature of the die is too high, the quenching method and time are not reasonable, and the number and temperature of quenching, improper selection between elbows, will cause damage to the die after stamping production. Improper fixation of punch or insufficient screw strength. This can cause the punch to burst or break.

Too low working height adjustment and insufficient guide post lubrication. In general, the heat treatment method of the mold material and the impact. Large sheet metal processing blanking hole specifications or depth design is insufficient, casually make the notch infarction, resulting in blanking plate damage. During the use of the mold, the parts position and orientation are installed incorrectly or the bolts are not fastened properly.

2. Card mode

The important causes of card mode are: incorrect die orientation, tilt. Otherwise, it may expand the fault, resulting in mold damage. Cause the mold deformation, such as the hardness and thickness design of the mold base and template are too small, and they are deformed by external force impact casually. The mold parts are not installed accurately, and the positioning error deviation of the upper and lower molds is caused. At this time, the strength of the punch should be improved to improve the guidance and maintenance of the discharge plate.

or the precision of the punching machine is very poor, causing the die to interfere; The strength of the punch is insufficient and the size of the punch is too close, which makes the lateral force of the die unbalanced. In the stamping process, once the mold clamping is not flexible or even stuck, it is necessary to stop production immediately, find the cause of the mold clamping and eliminate the fault.

3. Mold damage and repair

The die for stamping is expensive. General mold costs account for 1/5-1/4 of the total cost of products. The one-time repair cost of sheet metal stretching exceeds 70% of the original cost of the die, or the die life is approaching. When the mold maintenance technology is too complicated, the cost of mold repair is too large, and the difficulty is high, the maintenance cycle will be too long, which will seriously affect the normal production of stamping, and the mold should be manufactured again after early invalid damage. Generally speaking.

After the mold is damaged, there is another selection topic for repair and damage. But. Therefore, timely maintenance of the mold, to avoid damage to the mold, can greatly reduce the cost of stamping manufacturing mold. When the key parts of the mold are severely damaged, sometimes the convex and cavity are damaged at the same time. This is because, in addition to the mold manufacturing difficulty, high cost. Non-natural wear failure of stamping dies, such as the destruction of non-pivot parts.