The service life of the stamping die is related to many factors such as the structural design of the stamping die, the selection of steel for the stamping die, heat treatment, surface treatment, machining and grinding, wire cutting process, stamping equipment, stamping materials and processes, stamping die lubrication, poor maintenance and repair level. Among the various factors that cause the failure of the stamping die, the unfair structure and improper material selection of the stamping die account for about 25%, improper heat treatment account for about 45%, and process problems account for about 10%; equipment problems, lubrication problems and other factors account for about 20%. After the installation of the stamping parts, pay attention to maintenance to prevent rust and erosion. In daily use, it should be turned off lightly to prevent hard opening and damage. The following is how to prevent damage: 1. The sliding brace hinge shall not be made of aluminum alloy material, but stainless steel material. 2. For sliding windows with a width of more than 1 meter, or doors and windows with double-layer glass installed, double pulleys should be set up, or dynamic pulleys should be selected. 3. Hardware accessories should be installed at the end. Door and window locks, handles, etc. should be assembled after the window and door fans are put into the frame to ensure accurate position and flexible switch. 4. Install the hardware with fastening screws. Metal liners must be installed inside. The thickness of the liners should be at least twice that of the fastener pitch. It shall not be fastened to plastic profiles, nor shall non-metallic liners be used. 5. The models, specifications and functions of hardware accessories should conform to the current standards and relevant delineations in our country, and match with the selection of plastic steel doors and windows. 6. Pay attention to maintenance after installation to prevent rust and erosion. In daily use, it should be turned off lightly to prevent hard closing and hard opening, causing damage.