Knowledge

Polyurethane sieve plate Due to the large gap between the zigzag punch and the die, the zigzag die usually does not have a guide device for the upper and lower dies, which is beneficial to simplify the mold manufacturing. Only when the screen bending die contains a large number of stamping processes, it is necessary to set the guide sleeve to facilitate the production of the mold equipment. Under the premise of meeting the application requirements of the zigzag parts, a larger concave and convex gap should be selected as much as possible, which is conducive to improving the mold life and the surface quality of the zigzag parts.

Polyurethane sieve plate manufacturer: However, it is always beneficial to reduce the bending rebound by appropriately reducing the gap value. Symmetrical zigzag mode, the convex corner radius and concave corner radius of the die should be flat on both sides to avoid the blank from shifting during the bending process. Asymmetrical large bending parts should avoid the blank from sliding or shifting during the bending process. To this end, the compaction equipment of the blank should use air cushions on the press as much as possible, or use holes on the workpiece or machined holes on the blank for positioning.

Asymmetric zigzag small pieces, in order to avoid the deflection of the small blank during the zigzag process, a symmetrical zigzag die is selected. The blank is placed on the die to ensure safe positioning. When there is a hole on the polyurethane sieve plate workpiece that can be used as a positioning hole, the hole should be positioned on the workpiece first. When there is no hole on the workpiece and it is allowed to punch out the processing hole on the blank, the location of the processing hole should be considered.

When the workpiece does not allow the processing hole, the blank shape should be positioned with a positioning plate. A strong pressure plate or a spring pressure plate should be set together to press the blank. The polyurethane sieve plate is deformed and deformed. In a sense, it will be attacked during the interception process. The slight zigzag deformation of the debris sieve plate remains on the shear product, and the result is simple plastic distortion and small rebound. The greater the residual distortion.

Polyurethane sieve plate manufacturer: In addition, when the width of the shear band is narrower than the thickness of the material, the part that does not bend and has an obstructive effect is relatively small, so that the deformation also increases. In order to avoid this deformation, the shear angle should not be too large. Even if the sheared polyurethane screen plate is pressed from bottom to bottom, the screen is completely eliminated because the elongation strain that forms the deformation is originally very small.