3. Duplication

In the stamping production, after the last station is cut off, the production parts are set to be blown out of the mould in time and remain on the mould, which is easy to produce the phenomenon of overlapping.Stacking is very dangerous and can easily damage the mold.There are a lot of factors to produce the stack, such as the insufficient wind blowing, the adhesive effect of stamping oil, the production parts hook and hang on the top rod.In view of these factors, a variety of measures can be taken to prevent the phenomenon of duplicate entries.For example in the stamping production to ensure that the wind blowing air is large enough, when the mold design in the concave template and unloading plate are added on the rod, which concave template on the rod should be designed larger, at least than the hole on the parts, or simply use batting block structure, in order to avoid the production parts hook hanging on the rod.When designing the concave formwork, a wide slope should be designed at the end of the concave formwork, so that the parts can slide out of the die smoothly.In addition, the design should also consider in the last station to be cut off the cattle parts out of the concave template or at least half of the slope, as far as possible to rely on the weight of the production parts slip out of the mold.

4. The leakage hole is blocked

In the stamping production, if there is a flood material hole plug and not found in time, it is easy to damage the mold, resulting in the break of punch or cavity bulging crack.To prevent the leakage hole plug, plastic lighter cover to ensure smooth leakage. Be sure to set the size of the leakage hole.For some small protruding parts, the size of leakage hole should be appropriately enlarged;And for the scrap roll caused by the leakage hole plug, to reduce the size of the leakage hole.When the mold design. Should give enough attention to the leakage hole, the design of the concave template as a reference, to ensure that the outline of the leakage of the concave template plate is larger than the outline of the leakage of the concave template, the design of the bottom die frame to the concave plate as a reference.Finally, to ensure that the installation plate leakage hole is smaller than the machine tool leakage hole, otherwise, it is necessary to open a slope on the next installation plate, to ensure that the waste eventually slip into the machine tool leakage hole.

In addition, the die edge grinding dam or stamping oil too much post will also cause leakage hole plug, should be timely grinding or reduce the replacement of stamping oil.

5. Poor feeding

Poor delivery of light will affect production, heavy will damage the mold.The causes are as follows:

(1) if there is a difference between the step distance and the design step distance during production, the step distance should be adjusted.

(2) if the spacing of lifting nails is too large, the number of lifting nails should be increased.

(3) the strip height is not enough, the strip is easy to hook and hang on the lifting block or the jacking rod, ningbo precision stamping parts should increase the strip height.

(4) the feeding gap of lifting nails is too small, and the feeding gap of strip is not smooth, so the gap should be appropriately enlarged.

(5) the strip is too wide and thin, easy to produce warped shirt, should be in the middle of the strip increase lifting block.