Stamping parts in the progressive die, by punching the stamping parts around the remaining material to form the shape of the punch. The main cause of the punching and twisting is the effect of the punching force. At the time of punching, the material is stretched on the side of the die (the material is warped upward) due to the presence of the blanking gap, and is compressed by the punch side. When the discharge plate is used, the material is pressed against the material by the discharge plate to prevent the material on the die side from being warped upward. At this time, the stress state of the material changes accordingly. With the increase of the pressing force of the discharge plate, the material on the punch side is stretched (the compressive force tends to decrease), and the material on the die surface is compressed (the tensile force tends to decrease). The reversal of the stamping part is due to the drawing of the material on the die face. Therefore, when punching, pressing and pressing the material is to prevent the punching material to produce material, twist the focus. Reasons and Countermeasures of Scissors in Bending.
1, blanking caused by the red hair caused by. Need to study punching cutting edge, and pay attention to check whether the punching gap is reasonable.
2, punching has been produced when the punching material, twisting deformation, resulting in poor bending after bending, need to start from the blanking down the work to solve.
3, bending when the stamping parts caused by instability. Mainly for U-shaped and V-shaped bend. The handling of this problem, the bending of the stamping parts before the guide, the bending process of the guide, and bending the process of suppressing the material to prevent stamping parts in the bending slip is the focus of the problem.

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