Generally, we calculate the unfolding size of stamping parts in this way. First, we don't think about bending thinning the material at all. The calculation method is very simple. It is mainly to calculate the neutral layer radius r of the bending part (find out the neutral layer position coefficient X, r = R + XT), and then calculate the expansion length of the bending section according to the arc length formula. Just sum. If you want to consider the material thinning in the bending part, you should calculate the blank according to the principle of constant volume, which needs further correction.
In the long-term use of stamping die for automobile stamping parts, wear or loose parts will also lead to product scrapping. There are many stamping plants that do not carry out daily inspection and maintenance of the die after installing the die for production. Only when the burr is large, the die is removed and the knife edge is simply polished. As everyone knows, the wear of the die is not only the blade wear, but also some die accessories will wear with use. After these accessories are worn, they will affect the accuracy of the whole die.
In the process of sheet metal processing, laser cutting is a very important processing technology. A good laser cutting part can reduce many unnecessary steps for subsequent processing. What are the important factors of high-precision laser cutting
1. The size of the spot after the laser beam passes through the focus.
The smaller the spot after laser beam aggregation, the higher the precision, especially the smaller the slit, and the small spot can reach 0.01mm.
2. The positioning accuracy of the worktable determines the repetition accuracy of laser cutting. The higher the accuracy of the worktable, the higher the cutting accuracy.
3. The greater the thickness of the workpiece, the lower the precision and the larger the slit.
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