Bending: A plastic forming method of bending sheet metal, pipe fittings and profiles into a certain angle, curvature and shape. Bending is one of the main processes widely used in the production of stamping parts. The bending of metal materials is essentially an elastic-plastic deformation process. After unloading, the workpiece will produce elastic recovery deformation in the direction, which is called rebound. Springback affects the accuracy of the workpiece and is a technical pipe fitting that must be considered in the bending process.

Deep drawing: Deep drawing, also known as drawing or calendering, is a stamping method that uses a die to make a flat blank obtained after blanking into an open hollow part. Thin-walled parts with cylindrical, stepped, conical, spherical, box and other irregular shapes can be made by deep drawing. When combined with other stamping and forming processes, parts with extremely complex shapes can also be produced. In stamping production, there are many types of deep drawing parts. Due to their different geometrical characteristics, the position of the deformation zone, the nature of the deformation, the distribution of the deformation, and the stress state and distribution law of each part of the billet are quite different, even in essence. Therefore, the determination methods of process parameters, the number and sequence of processes, and the principles and methods of mold design are different. According to the characteristics of deformation mechanics, various deep-drawing parts can be divided into four types: straight-wall revolving body (cylindrical part), straight-wall non-revolving body (box-shaped body), curved surface revolving body (surface-shaped part) and curved non-revolving body. Types of.

Drawing is to apply tension to the sheet through the drawing die, so that the sheet produces uneven tensile stress and tensile strain, and then the bonding surface of the sheet and the drawing die gradually expands until it fully fits with the drawing model surface. The applicable object of the pulling shape is mainly the hyperbolic skin with certain plasticity, large surface area, gentle and smooth curvature change, and high quality requirements (accurate shape, smooth streamline, and stable quality). Due to the relatively simple process equipment and equipment used in drawing, the cost is low and the flexibility is large; but the material utilization rate and productivity are low.

Spinning is a metal rotary machining process. During the processing, the blank is actively rotated with the spinning die or the spinning head is actively rotated around the blank and the spinning die. body parts.