Metal stamping parts are widely used in various fields of our lives, including some electronic devices, auto parts, decorative materials, etc. The hardness of metal stamping parts is tested with a Rockwell hardness tester. Small stamped parts with complex shapes can be used to test small surfaces that cannot be tested with conventional benchtop Rockwell hardness testers. Let's get to know what the dimensional accuracy of metal stamped parts is.
The dimensional accuracy of metal stamping parts refers to the difference between the actual size of the stamped parts and the base size. The smaller the difference, the higher the dimensional accuracy of metal stamped parts. The main factors causing dimensional errors in metal stamped parts are: the accuracy of manufacturing convex and concave dies; gap between convex and concave dies; elastic recovery of material after stamping; random factors in the production process, such as inaccurate positioning, unstable material properties, etc.
The surface quality of metal stamped parts should not be higher than the surface quality of the raw materials, otherwise, to achieve it, additional post-processing will be required, increasing the cost of production.
The dimensional accuracy of metal stamping parts can generally be divided into two categories: precision level and conventional level. The precision level is the precision that can be technically achieved in the stamping process, while the conventional level is the precision that can be achieved by more economical means. When the mold manufacturing precision is high, the external dimension accuracy of metal stamping parts can reach ITl0 level, and the internal hole size can reach IT9 level.