Metal stamping parts are widely used in our lives, including some electronic devices, auto parts, decorative materials and so on. The hardness test of metal stamping parts adopts Rockwell hardness tester. Small, complex-shaped stampings can be used to test small planes that cannot be tested on ordinary benchtop Rockwell hardness testers.
The dimensional accuracy of metal stamping parts refers to the difference between the actual size of the stamping parts and the basic size. The smaller the difference, the higher the dimensional accuracy of the metal stamping parts. The main factors that cause the dimensional error of metal stamping parts are: the manufacturing accuracy of the convex and concave dies; the gap between the convex and concave dies; the elastic recovery of the material after stamping; accidental factors in the production process, such as inaccurate positioning, unstable material properties, etc.
The surface quality of metal stamping parts should not be higher than the surface quality of raw materials, otherwise it needs to increase the subsequent processing to achieve, which increases the production cost.

The service life of metal stamping parts is related to many factors, such as the steel selected for the mold, mold structure design, heat treatment, surface treatment, machining grinding, wire cutting process, stamping equipment, stamping materials and stamping parts processing technology, mold lubrication , maintenance level, etc. After installing the metal stamping parts, pay attention to maintenance to prevent rust damage. In normal use, it should be lightly closed and lightly opened. Do not use too much force to damage the stamping parts and cause damage.
Several methods to prevent damage to metal stamping parts:
1. The type, specification and performance of metal stamping parts should comply with current standards and relevant regulations, and should match the selection of plastic steel doors and windows.
2. For sliding windows with a width of more than 1 meter, or doors and windows with double-layer glass, double pulleys should be set, or rolling pulleys should be used.
3. The sliding brace hinge shall not use aluminum alloy material, but stainless steel material.
4. Install the hardware with fastening screws, and there is a metal lining plate inside. The thickness of the lining plate should be at least twice the tooth spacing of the fasteners. It must not be fastened to plastic profiles and must not be lined with non-metallic materials.
5. The metal stamping parts should be installed after the metal should be installed. The door and window locks, handles, etc. should be assembled after the window and door leaves are in the frame. The position is correct and the switch is flexible.
6. Pay attention to maintenance after installation of metal stamping parts to prevent rust and corrosion. In daily use, it should be lightly closed and lightly opened to prevent hard closing and hard opening, which may cause damage. No noise, there are now nylon wheels. It not only pushes and pulls without noise, but also is smoother and lighter, and its service life is not shorter than that of the above pulleys. To make the (door) window operate normally and smoothly, it is necessary to select a pulley for the (door) window. Inferior pulleys are rough in workmanship, not smooth, inflexible when sliding, small and light.