What are the reasons for the blockage of chips in die stamping parts, and what countermeasures should be taken?

The reasons and corresponding countermeasures for the blockage of chips in stamping parts are as follows: 

1) The leakage hole is too small, the gap of the leakage hole can be increased; 

2) The leakage hole is too large, the scrap material rolls, and the leakage hole is re-modified; 

3) The knife edge is worn and the burr is large, and the knife edge needs to be trimmed;  

4) The oil dripping is too fast and the oil is sticky. You can control the amount of oil dripping and change the oil type;  

5) The surface of the straight blade of the concave die is rough, and the powder is sintered and attached to the blade, and the surface roughness can be reduced or the material can be changed by surface treatment and polishing; 

6) The material is soft, modify the blanking gap;
The emergency measures are: trim the end face of the punch blade with a slope or arc (pay attention to the direction), use a vacuum cleaner, and blow air at the blanking hole of the backing plate.

What are the reasons for the variation of the blanking offset size during die stamping?

What countermeasures should be taken? The main reasons for the variation of blanking offset size and the corresponding countermeasures are:  

1) The knife edge of the convex and concave die is worn, resulting in burrs (the shape is too large, the inner hole is too small), and the knife edge needs to be repaired; 

2) Improper design clearance, modify the design and control the machining accuracy; 

3) If the punch and die inserts at the blanking level are offset and the gap is uneven, the position accuracy and blanking gap can be adjusted; 

4) If the guide pin is worn and the pin diameter is insufficient, the guide pin can be replaced; 

5) If the guide is worn, the guide post and guide bush can be replaced;  

6) The feeding distance of the feeder is not properly adjusted for the release of the pressing material, and the feeder is re-adjusted; 

7) Improper adjustment of the mold closing height, re-adjust the closing mold height; 

8) The stripping inserts are worn out, there is no pressing (strong pressure) function or the punching is small due to the material pulling and turning over) the stripping inserts can be ground or replaced, the strong pressure function can be increased, and the pressing materials can be adjusted; 

9) The strong pressure of the stripping insert is too deep, the punching hole is too large, and the die needs to be adjusted to reduce the strong pressure depth; 

10) If the mechanical properties of stamping materials vary (unstable strength and elongation), it is necessary to replace the material and control the quality of the feed; 

11) The punching force causes the dimensional variation of the material traction. The end face of the punch blade can be trimmed with a slope or arc to improve the force condition during punching, or a guide function can be added to the blanking part on the stripping insert.

Suzhou Huihong Electric Co., Ltd. is a professional manufacturer of precision molds ，Auto parts Mould, assembling and silk-printing. Some moulds are exported to Japan, Europe and the United States. We have the right to import and export the goods. We can develop and manufacture the moulds according to the needs of our customers. We pay attention to quality control, new project development, personnel training, team spirit. In recent years, we have established long-term business relationships with many well-known enterprises at home and abroad.