The material used for metal stamping parts is closely related to the stamping process, and its nature directly affects the design of the stamping process, the quality of the metal stamping parts and the service life of the product, and also affects the balanced production of the organization and the production cost of the stamping parts. When choosing metal stamping materials, first of all, it is necessary to clarify the use requirements of metal stamping parts. Generally speaking, for the main stamping parts on the machine, the material requires high strength and rigidity: some stamping parts on electrical appliances require high electrical conductivity and magnetic permeability: stamping parts on automobiles and airplanes, Sufficient strength is required, and quality should be reduced as much as possible: stamping parts on chemical containers require corrosion resistance, etc. Therefore, different use requirements determine that different stamping materials should be selected. However, considering the stamping process, the material should also meet the stamping process requirements to ensure the smooth completion of the stamping process.
The requirements for the materials used for stamping are as follows:
1. Metal stamping materials have good stamping performance Stamping performance refers to the adaptability of the sheet to various stamping methods.
The stamping method is a processing method in which metal is used as a plastic part, therefore. The material is required to have good plasticity. For the sheet metal that needs to be deep drawn, it is required to have good plasticity, low yield limit and large thickness directional coefficient, while the material with high hardness is difficult to deep draw. The smaller the yield ratio of the sheet, the better the stamping performance, and the greater the limit of secondary deformation. When the plate dryness directivity coefficient r>1, the deformation in the width direction is easier than the deformation in the thickness direction. The larger the r value is, the less likely it is to thin and fracture during the drawing process, and the better the drawing performance is. Materials with good deep drawing performance include mild steel with carbon content <0.14%, teaching brass (68%~72% copper content), pure aluminum and aluminum alloy, austenitic stainless steel, etc.
2. Good surface quality of metal stamping materials:
materials with good surface quality, the parts are not easy to be broken during stamping, and the waste products are less: the mold is not easy to be scratched. The life is improved, and the surface quality of the parts is good. Therefore, it is generally required that the surface of the stamping material is smooth and smooth, without oxide scale, rust, cracking, scratches and other defects.
3. The thickness tolerance of metal stamping materials conforms to international regulations.
The gap between the deep drawing punch and the die is determined according to the thickness of the material, so the thickness tolerance of the material should meet the national standards. Otherwise, the thickness tolerance is too large, which will affect the quality of the part and may cause damage to the mold and equipment.
Metal stamping parts manufacturers will use many different raw materials in stamping processing, which is the first guarantee for processing qualified metal stamping parts. Whether the selected raw materials are qualified and suitable for stamping parts manufacturers is very important. The following will introduce you to 3 aspects that need to be considered when choosing metal stamping parts materials.
1. Requirements for use
(1) Use scenarios of metal stamping parts
Specifically, it depends on what environment the metal stamping parts are used in, and what are the specific requirements for strength, hardness, corrosion resistance, etc.
(2) Requirements for the size and quality of metal stamping parts
Most of the stamping parts need to be used in conjunction with other parts, which depends on the dimensional accuracy requirements of the stamping parts when matching.
(3) The importance of metal stamping parts
For the finished product after assembly, the degree of influence of metal stamping parts in the whole finished product.
Metal stamping parts
2. Process requirements
(1) The manufacturing process of the blank;
(3) heat treatment;
(4) Surface treatment.
3. Economic requirements
(1) Material price;
(2) Processing batch and processing cost;
(3) The utilization rate of materials;
(4) Alternative materials.