Metal stamping is the use of punch press and mold stainless steel, iron, aluminum, copper and other plates and the opposite material deformation or fracture, to achieve a certain shape and size of a process. Usually metal stamping technology using plate, thin wall tube, thin profile as raw materials, with easy operation, high stamping precision, easy to achieve mechanization and automation and other advantages. What are the methods to improve the metal stamping process:
One, the rational development of stamping processing technology
1, hardware stamping parts in the design of the structural shape of parts, it is best to use a simple and reasonable structure of the surface and its combination, but also should try to make the minimum number of processing surfaces and processing area.
2, metal stamping materials, not only to meet the technical requirements of product design, but also to meet the requirements of stamping process and stamping after cutting, electroplating, cleaning and other processing requirements.
3, metal stamping forming performance requirements for the forming process, in order to facilitate the stamping deformation and improve the quality of the parts, the material should have a good plasticity, small flexural strength ratio, plate thickness directional coefficient, plate plane directional coefficient, material yield strength and elastic modulus ratio is small. For the separation process, the material does not need to have a good plasticity, but should have a certain plasticity, the better the plasticity of the material, the more difficult to separate.
4. Select the method of blank preparation in reasonable mechanical manufacturing, which can directly use profile, casting, forging, stamping and welding, etc. The selection of blank is related to the specific production technical conditions, generally depends on the production volume, material properties and processing possibilities.
5. Specify the processing cost of parts with appropriate manufacturing accuracy and surface roughness. The processing cost of hardware stamping parts will increase with the improvement of accuracy, so the surface roughness of hardware stamping parts should be made appropriate provisions according to the actual needs of the surface.
6, the selection of stamping oil should meet the technical requirements, the stamping oil with excellent performance can significantly improve the processing environment, improve the accuracy of the workpiece.
Two, the principle of stamping hardware processing
1. Precision principle: the number of working procedures of drawing parts is related to the properties of materials, drawing height, number of drawing steps, drawing diameter, material thickness and other conditions, which can only be determined by drawing process calculation.
2. Principle of refinement: the number of working procedures of bending parts mainly depends on the complexity of their structural shapes, which shall be determined according to the number of bending angles, relative positions and bending directions.
3, fine principle: when the requirements for the section quality and dimensional accuracy of the stamping workpiece is higher, you can consider adding the finishing process after the blanking process or directly using the precision blanking process.
4, precise principle: blanking the shape of the workpiece is simple, the use of a single process mold can be completed, and in blanking the shape of the workpiece is complex, because the structure or strength of the mold is limited, its internal and external contour should be divided into several parts blanking, need to use multiple processes of hardware stamping processing. If necessary, a continuous die can be used. For the workpiece with higher flatness requirements, a leveling process can be added after the blanking process, the characteristics of each product accurate into the production process.
5, quality principle: in order to ensure the quality of precision metal stamping parts, improve the stability of metal stamping processing technology sometimes need to increase the number of procedures. Such as additional positioning process of the bending hole punching, forming process to increase the deformation to reduce the hole blanking to transfer the deformation area, to ensure that each product to achieve precision, fine, fine quality.
The above is the method to improve the quality of metal stamping parts, the system of reasonable processing technology is to improve the workpiece accuracy of the most effective method