Methods to suppress turning and distortion of stamping parts:

(1). Reasonable mold design. In the progressive die, the arrangement of the blanking sequence may affect the accuracy of stamping parts forming. For the blanking of small parts of stamping parts, a larger area of ??punching is usually arranged first, and then a smaller area of ??punching is arranged to reduce the impact of the punching force on the forming of the stamping parts.

(2). Press the material. Overcoming the traditional mold design structure, a material-accommodating gap is opened on the unloading plate (that is, when the mold is closed, the unloading plate and the concave mold fit together, and the gap between the unloading plate and the concave mold at the place where the material is accommodated is the material thickness t-0.03 ~0.05mm). In this way, the unloading plate moves smoothly during stamping, and the material can be compacted. In the key forming parts, the unloading plate must be made into a block structure to facilitate the solution of the wear (pressure) damage caused by the long-term stamping of the unloading plate pressing part, which makes it impossible to compress the material.

(3). Add strong pressure function. That is, the pressing part of the unloading insert is thickened (normal unloading insert thickness H+0.03mm) to increase the pressure on the material on the die side, thereby inhibiting the stamping parts from turning over and twisting during punching.

(4). The end of the punch cutting edge is shaped into a bevel or arc. This is an effective way to reduce buffering forces. Reducing the buffer cutting force can reduce the tensile force on the material on the die side, thereby inhibiting the stamping parts from turning over and twisting.

(5). In daily mold production, attention should be paid to maintaining the sharpness of the cutting edges of the punching convex and concave molds. When the punching edge wears, the tensile stress on the material will increase, resulting in an increased tendency for stamping parts to turn over and twist.

(6). Unreasonable punching gaps or uneven gaps are also the reasons for the turning and distortion of stamping parts and need to be overcome.