How to effectively avoid springback of precision stamping parts

After the metal material is produced by stamping, it can obtain precision stamping parts of a certain shape and size through plastic deformation. However, due to the occurrence of plastic deformation, it is inevitable that there will also be elastic deformation, especially when bending and forming, it is easy to produce rebound phenomenon, which will affect the shape and accuracy of the workpiece, so what measures can be used to effectively rebound the specifications The problem?

Manufacturers can take the following methods to avoid the rebound problem:

1. When selecting raw materials, under the premise of meeting the requirements of the workpiece, materials with a relatively large elastic modulus should be selected as much as possible.

2. When designing the shape of the workpiece, if the shape and degree of bending are complex, the stress in all directions will also be complex during a bending process. At this time, a combination of several components can be used to alleviate the springback problem.

3. Reducing the value of the R angle of the curved part can also solve the problem of springback to a certain extent.

4. The problem of springback is solved by drawing beads. By setting the drawing position reasonably, the flow direction of the material can be effectively changed, and the feeding resistance on the pressing surface can be effectively distributed to improve the forming state of the material. Drawbeads are used where springback is likely to occur to make the stress distribution more uniform.

5. When designing pre-forming, the one-time forming workpiece can be distributed in different processes to complete the forming effect, and the problem of workpiece defects caused by springback can be solved by eliminating the internal stress during the forming process.

6. Optimize the blank holder force of the workpiece, adjust the flow direction of the material, and improve the internal stress of the workpiece. Generally speaking, the increase of the blank holder force can make the drawing of the workpiece more sufficient and reduce the springback.

To sum up, to avoid the springback of precision stamping parts, we can solve it from three different time periods, one is in the workpiece design, one is in the design process, and the other is in the design of the mold structure. Controlling these three time periods can well avoid the rebound problem in the production process.