What are the requirements for metal stamping materials?

What are the requirements for metal stamping materials? The thickness is accurate and uniform. The stamping die is precise and has a small gap. If the thickness of the sheet is too large, it will increase the deformation force and cause jamming and even burst the die. If the sheet is too thin, it will affect the quality of the finished product and even crack during deep drawing.　　The surface is smooth, no spots, no scars, no scratches, no surface cracks, etc. All surface defects will remain on the surface of the finished workpiece, and the crack defects may extend deep and wide in the process of bending, deep drawing, forming, etc., resulting in waste products.　　 The yield strength is uniform and there is no obvious directionality. Anisotropy (see plastic deformation in the drawing, flanging, bulging and other stamping processes, due to the occurrence of all-directional yielding, the inconsistent amount of plastic deformation will cause uneven deformation and inaccurate forming. Inferior product or scrap. 　　 High uniform elongation. In the tensile test, the elongation before the neck phenomenon of the sample begins to be called uniform elongation. During deep drawing, the deformation of any area of u200bu200bthe sheet cannot exceed the uniform elongation of the material Range, otherwise uneven deformation will occur. 　　 low yield ratio. The ratio of the yield limit of the material to the strength limit is called the yield ratio. A low yield ratio can not only reduce the deformation resistance, but also reduce the wrinkles during drawing Tendency to reduce the amount of springback after bending and improve the accuracy of bending parts. 　 Previous post: Where do I need to use metal stamping parts in my life?