The stamping part is a forming method for forming a workpiece (stamping part) of the desired shape and size by applying an external force to the plate, the strip, the pipe and the profile by the press and the mold to cause plastic deformation or separation. Stamping and forging are the same plastic processing (or pressure processing), collectively called forging. Stamping blanks are mainly hot and cold rolled steel and steel. Stamping is mainly classified according to process, can be divided into two major categories of separation process and forming process.
Stamping
First, the stamping principle and characteristics
1, the basic principle of cold stamping
Metal or non-metallic deformation in the external force, when the external force exceeds the yield limit of the material, began to plastic deformation. If the pressure increases, more than the ultimate strength of the material, metal or non-metallic began to break, separation. Cold stamping is the use of the nature of this metal, so that the material at room temperature separation or deformation, so as to obtain the required shape and accuracy of the parts.
2, cold stamping advantage is
1) Under the impact of the punch, can get the shape of complex parts.
2) After processing parts of high precision, dimensional stability, good interchangeability.
3) in the case of material loss is not the case, can be light weight, good strength, good rigidity, smooth appearance of the beautiful parts.
4) material utilization up to 75% to 85%.
5) Most of the materials used are sheet metal or coil material easier to use mechanization and automation equipment. High-speed presses are hundreds of pieces per minute.
6) easy to operate, low labor intensity.
7) under the conditions of mass production, the cost of parts is low.
3, cold stamping is a higher demand for mold, mold manufacturing more complex, not suitable for small batch production.
Metal stamping parts
Second, the economy of stamping
1, reduce the cost of manufacturing the main measures
1) to improve the level of rationalization of the process.
2) the design of each workpiece at the same time processing of the mold.
3) to improve the stamping process automation and high-speed level, reduce costs.
4) Reduce costs by increasing the utilization of materials.
5) to improve the mold design level, reduce the process, improve die life.
Third, the stamping process
1, according to the total deformation properties of materials, stamping process is divided into two categories of five basic deformation.
1) separation process: the material under external force, the deformation of the part of the stress exceeds the strength of the material limit sheet fracture and separation.
2) plastic deformation process: sheet under the action of external force, the deformation of the part of the stress exceeds the material yield limit, but did not reach the strength limit, only the plastic deformation table to get a certain shape and size.
Stamping
Four stamping processes of the five deformation
1, cut, punching: not closed or not closed so that part of the material and another part of the separation. Belong to such a way blanking, punching, trimming, cutting, cutting, incision and so on.
2, bending: the flat sheet into a bending piece, so that the shape of bending pieces to further change. Curved, curled and so on.
3, calendering: the blank blanks into the desired shape of the hollow pieces, or the size of the hollow pieces for further changes.
4, forming: with a variety of properties of the local deformation of flat or change the shape of the blank. Belonging to the deformation of the deformation of the ups and downs forming, flanging, necking, convex belly, roll round, plastic.
5, three-dimensional suppression: the volume for the redistribution and the material for a certain transfer to change the shape of the blank or a high degree of thickness.
In the process of stamping parts in order to improve productivity, several basic deformation of the process can be combined to form a new process, known as the composite process.
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winnie
winnie
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