Causes of Burrs in Hexagon Bolts
2022-03-02
Causes of burrs in hexagon bolts
1. Your clip is not aligned with the cutting die. The cutting die should not be too large or too small. If it is too small, it will easily drag the tail. If the head is too large, the cutting edge will not be cut properly. The burr on the support surface is because the action of the trimming ejector is fast or slow, or the trimming die is worn out. It is also very important to re-grind and pre-punch.
2. In production, especially when screwing heads, the blow time is too fast. Or a punch opening is too small.
3. When the punching die just leaves the main die during the trimming, the back support hits the screw on the top of the main die ejector pin, and it is just cut off either quickly or slowly.
4. The hardness of the bolt raw material is also related. The best raw material hardness of the trimmed bolt is above HRB88.
Of course, it is certain that when the hexagonal bolt is trimmed, the burrs must not only be the above reasons, but also other reasons. But many of the above reasons are the main reasons. For screw production personnel, we can refer to the above reasons when encountering burrs on the cutting edge in the future. Find the detailed reason and the problem, and then solve the glitch problem step by step.
1. Your clip is not aligned with the cutting die. The cutting die should not be too large or too small. If it is too small, it will easily drag the tail. If the head is too large, the cutting edge will not be cut properly. The burr on the support surface is because the action of the trimming ejector is fast or slow, or the trimming die is worn out. It is also very important to re-grind and pre-punch.
2. In production, especially when screwing heads, the blow time is too fast. Or a punch opening is too small.
3. When the punching die just leaves the main die during the trimming, the back support hits the screw on the top of the main die ejector pin, and it is just cut off either quickly or slowly.
4. The hardness of the bolt raw material is also related. The best raw material hardness of the trimmed bolt is above HRB88.
Of course, it is certain that when the hexagonal bolt is trimmed, the burrs must not only be the above reasons, but also other reasons. But many of the above reasons are the main reasons. For screw production personnel, we can refer to the above reasons when encountering burrs on the cutting edge in the future. Find the detailed reason and the problem, and then solve the glitch problem step by step.
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