The Metal Stamping Parts are processed by the plastic properties of the metal material to have the desired shape. After the metal material is formed, its structure and properties are improved and improved. Any member subjected to alternating load or poor stress conditions generally has to pass the plastic forming process in order to meet the requirements for use. Plastic forming is a chipless forming method, which enables the workpiece to obtain a good streamline shape and reasonable material utilization. The plastic forming method can achieve a high precision of the workpiece size and high production efficiency.
Plastic forming is divided into cold forming, warm forming and hot forming. Warm forming takes into account the effect of temperature on the properties of the material. Thermoforming also takes into account the creep effect of the material. Metal stampings include block forming, sheet forming, rolling, etc. (see Plastic Mechanics). All kinds of plastic forming are premised on the plastic properties of metal materials, all of which require external force, and all have external friction effects, which follow the common metallurgical and plastic mechanics laws.
The method of applying plastic mechanics to study the law of metal forming is called plastic analysis of metal forming. Its task is: 1 to study various solutions of mechanics in plastic forming process, to analyze the distribution of stress and strain in deformation, and to determine the deformation force and Deformation work to reasonably select equipment tonnage and mold strength. 2 Study the variation of strain and size of the component during plastic forming, select the appropriate blank and reasonable intermediate blank shape to optimally achieve the desired shape of the component. 3 Study the effects of processing conditions such as temperature and strain rate on the resistance of metal plastic working and the measures to improve the toughness and reduce the resistance of the metal to obtain components with good performance. The plastic analysis methods for metal forming mainly include principal stress method, slip line method, upper limit method, finite element method, etc.; and the commonly used experimental methods include visual plasticity method and dense grid moiré method.