What are the technical requirements of metal stamping | WEIHUA

With the improvement of the quality of life at present, metal stamping parts have been deep into all fields, it has been closely related to our life.What are the technical requirements of metal stamping?The following metal stamping supplies company will affect the main factors of stamping processing sheet materials, molds, equipment and stamping oil, which are mainly introduced to you.

I. Raw material performance of metal stamping parts

1. Chemical analysis and metallographic examination

Analyze the content of chemical elements in the material, determine the grade and uniformity of grain size of the material, evaluate the grade of free cementite, banded structure and non-metallic inclusion in the material, and check the defects such as shrinkage cavity and porosity of the material.

2. Material inspection

Stamping parts material is mainly hot rolled or cold rolled metal plate and strip material, metal stamping parts of the raw materials should have a quality certificate, which ensures that the material in accordance with the specified technical requirements.When there is no quality certificate or for other reasons, the metal stamping parts factory can select the raw materials for reinspection as required.

3. Forming performance test

Bending test and cup process test shall be carried out on the material to determine the working hardening index and plastic strain ratio of the material, etc. In addition, the test method for the forming performance of the steel sheet can be carried out according to the provisions of the forming performance and test method of the steel sheet.

4. Hardness testing

Rockwell hardness tester is used for the hardness test of metal stamping parts.Small stamping parts with complex shapes can be tested with other test instruments.

Ii. Technological requirements of metal stamping parts

1, metal stamping parts in the design of the structural shape of the parts, the use of simple and reasonable structure of the surface and its combination, but also should try to make the number of processing surface and the minimum processing area.

2, select the reasonable method of blank preparation in mechanical manufacturing, can directly use profiles, casting, forging, stamping and welding, etc.The choice of blank and specific production technology conditions, generally depends on the production batch, material performance and processing possibilities.

3, metal stamping forming performance requirements, in order to help the stamping deformation and improve the quality of the parts, the material should have good plasticity, low flexural ratio, plate thickness directivity coefficient, plate plane directivity coefficient, the yield strength of the material and the ratio of elastic modulus is small.The separation process does not require the material to have a good plasticity, but the material has a certain plasticity.

4. Specify appropriate manufacturing accuracy and surface roughness.The cost of metal stamping parts will increase with the improvement of precision, especially in the case of high precision, this increase is very significant.Therefore, high precision should not be pursued when there is no sufficient basis.Similarly the surface roughness of metal stamping parts should also be based on the actual needs of the surface to make appropriate provisions.

Three, the selection principle of metal stamping oil

1, silicon steel plate: silicon steel plate is relatively easy to be blanking material, in order to generally clean the finished product of the workpiece, in order to prevent the burr produced by blanking under the premise of the use of low viscosity stamping oil.

2, carbon steel plate: carbon steel plate is mainly used for some mechanical equipment, such as the protection plate process requirements are not high low precision processing, so in the selection of stamping oil should first pay attention to the viscosity of the drawing oil.

3, galvanized steel plate: galvanized steel plate is the surface of hot dip plating or galvanized layer of welding steel plate, because and chlorine additives will occur chemical reaction, so in the selection of stamping oil should pay attention to the chlorine stamping oil may occur white rust problem.

4. Copper and aluminum alloy plate: Because copper and aluminum have good ductility, we can choose the stamping oil with oil agent and good sliding property to avoid the use of chlorine-containing stamping oil, otherwise the stamping oil corrosion will cause the surface discoloration.

5, stainless steel: stainless steel is easy to produce work hardening material, requires the use of oil film strength, good sinter resistance tensile oil.The stamping oil containing sulfur-chlorine compound additive is generally used to ensure the extreme pressure processing performance and avoid burr, rupture and other problems.

Metal stamping process and technical requirements are introduced in detail on the above three points.Metal stamping parts processing technology is more complex, in order to ensure that the performance of metal stamping parts can meet the use requirements, we need to follow the corresponding process requirements, to ensure the feasibility of production.For custom metal stamping, please contact us ~