Stamping parts

It is found that there are tearing and skewing phenomena in stamping parts, and the proportion of fracture parts is different due to the difference of stamping forming and production process conditions. According to the actual situation of the scene, through the inspection of the tearing position, fracture morphology and crush degree of stamping parts, it is considered that there are many reasons for the tearing and skewing of stamping parts.

 

It is possible that the process parameters in the stamping process are not reasonable, and the parts of the die, the core and the two must be closely connected together, and the forming can be realized by pressing the sheet metal plastic deformation when the sliding block of the machine tool slides down. But now, due to the quality instability of stamping parts, it shows that the pressure of machine tool is in the unbalanced state of pressure jump in the production process.

 

It is also possible that the design defects of flanging die in stamping parts processing lead to large forming stroke and small pressing area. It shows that the designer only considered the small blank surface in the initial die design, but ignored the guide slip stroke of the core forming.

 

Or it is related to the error between the parts processed by the mould and the drawing design Before parts forming, the positioning is carried out by the locating pin and hole on the upper plane of the pressing core, which requires that the pressing core must ensure stable, reliable and correct guide sliding in the forming process, otherwise the part will lose stability in the forming process, which will cause the collision and extrusion between the core and the die wall, resulting in tensile stress. When the strength limit of the material is exceeded, the part will tear and skew

 

In addition, if other factors are considered in the die structure, and the special guide plate is ignored, instead, the mutual guiding structure of the machined surfaces is adopted, which leads to the defects that the gap is too large and cannot be adjusted, which leads to the phenomenon of tearing and skewing of stamping parts.