Hello everyone, many friends who make molds have this problem. It is easy to jump out of waste during the pressurization process, so is there any way to prevent it? There are many methods, and no one dares to say that any method is 100% good. Method to prevent waste from jumping out of punch press die.
1. The producer has never encountered waste sticking 1300 times a minute. Sometimes the problem lies in the mold. If the mold is too low-end, the gap is too large, and the guide column is unqualified, it will also cause jumping. The IC lead frame stamping mold is 1300 times per minute. This number is normal. It is not fine punching that requires pressure.
2. Add a blow hole to the punch and a vacuum cleaner to the lower mold. If it doesn’t work, add an air gun.
3. After the convex and concave die edges are ground, no anti-jumping treatment is done. The edge is too sharp and it will also jump.
4. The punch is made of special shape, the punch is raised, and the knife edge is spot welded.
5. The purchased stamping oil is unqualified. It is also possible that the engineer or manager purchased unqualified stamping oil from the raw material supplier of the stamping oil, causing the abnormality.
6. For ordinary waste, designing the punch into an inverted arc shape and rounding the arc is also one of the methods. However, the problem of jumping waste that can be solved by rounding the arc is not a problem at all, and it is not necessarily useful.
There are many methods to prevent waste from jumping out of punch press die, and there are also many problems related to punching and die.
7. Cut the inside of the punching hole to prevent chip jumping. Generally, we punch the lower mold and add air blowing to directly clamp the material on the side. Regular ones can also be cut to prevent chip jumping. Large punches add air blowing. Small punches increase the avoidance below the blade directly, add air blowing, and sometimes the blade shrinks the gap.
8. There is no other way to deal with some waste except suction, because other methods are more expensive than suction. Some suction does not work. If it is particularly stubborn, you can add a small exhaust fan to the waste port under the punch press.
9. Thin materials are mainly prone to waste jumping. For holes above 3mm, you can add ejectors, and for holes below 3mm, you can only use vacuum suction cups.
10. The key to the problem of waste jumping is the gap. If the gap is good, it will not jump. First, set a reasonable production gap, and set a reasonable modeling cut-in amount for the shape of the production waste blade. Secondly, add air holes to the middle mold for backing material, add elastic ejectors to the demolding for point collection, and add excellent filter glue to the attached film. Finally, reduce the demolding contact surface to avoid adding waste.
11. Punch a 0.8-1.2 small hole with a diameter of 0.1mm copper strip. The chip always jumps out. The upper and lower parts are made of tungsten steel. Four small Rs are added to the circular hole of the lower cutter, but it is still not ideal and cannot solve the chip jumping problem. Solution to this problem: leave a 2.5 straight mouth on the die insert, enlarge the lower grinding head, and punch the needle to a depth of about 1.2-1.5. Chamfer the blade edge and gently turn the fine grinding head. The punch is 3-5 times thicker than the punch, and the straight part of the die is reduced. The punch has a slot corresponding to the blade edge, and there is waste stuck on it. This is a case study of preventing waste from jumping out of punch press dies.
12. Problem: 0.15 long punch, R0.03, the lower die blade is cut with oil, and waste is always brought out. Punch 0.06 material. Solution: Make the punch special-shaped; punch a hole on the punch and put a piece of rubber on it. How to add rubber glue to the 0.6 or 0.8 punch needle; chamfering the punch head is enough, but chamfering is useless after a long time, and it will still jump out occasionally.
13. A method that works for low-speed punch presses but is useless for high-speed ones: make a 3MM blade on the lower die, and knock the bottom a little bit to prevent the material from jumping out.
The structure and stamping conditions are different, so the problems caused by the stamping die and the material strip may also be different. There are more about Method to prevent waste from jumping out of punch press die.
