Analysis of Key Points in Design of Cutting Tongue and Bending Structure in Stamping Process

During the stamping process, factors such as the nature of the material, the design of the mould and the stamping conditions often lead to some undesirable phenomena in the workpiece, such as tongue cutting and curvature. These problems not only affect the product quality, but also increase the manufacturing cost. Therefore, an in-depth study of tongue cutting and curvature cutting in stamping processing and optimisation of the structural design of tongue cutting and curvature cutting are of great significance for improving product quality and production efficiency.

In stamping processing, tongue cutting refers to the excess material produced at the edge of the workpiece, which is shaped like a tongue extending outward; while cutting curvature is the unevenness of the edge of the workpiece, which is shaped like a wave bending. Both phenomena are caused by improper mould design and stamping conditions.

So how can we avoid and improve the problems of tongue and curve cutting in stamping processing? This requires us to consider from the following aspects:

1. Mould design: the design of mould is the key to determine the quality of stamping. When designing, the precision and rigidity of the mould should be ensured to avoid tongue and groove cutting of the workpiece due to the elastic deformation of the mould. In addition, the shape design of the die needs to take into account the flow characteristics of the material to prevent material build-up and fracture.

2. Stamping conditions: Stamping conditions include the size of pressure, speed and time control. Reasonable stamping conditions can effectively reduce the generation of tongue and groove. For example, too much pressure may lead to excessive plastic deformation of the material, resulting in tongue and groove; while too little pressure may not be able to fully plastic deformation of the material, the same will produce problems.

3. Material selection: Different materials have different fluidity and plastic deformation capabilities, so when selecting materials, the nature of the material should be taken into account and the appropriate material should be selected for stamping.

4. Post-processing: For workpieces that have produced tongue and curve cutting, they can be repaired by means of post-processing, such as grinding and cutting.