Stamping die basically does two things for metal plate. One thing is cutting, including all the actions to separate the plate, such as blanking, punching and trimming. Another thing is deformation, that is to change the shape of the plate, including all stamping actions that do not separate the plate and only change the shape, such as drawing, bending and bulging.

衝壓成形（xíng）模具的表麵處理很重要，因（yīn）為衝壓件隻（zhī）跟模具的表麵打交道。理想的金屬板材成形模具的表麵（miàn），必須是。光， 即比較高的光潔度，(幾微米，關鍵的（de）地方小於1微米。滑， 即比較低的摩擦係數， (小於0。

The surface treatment of stamping forming die is very important because stamping parts only deal with the surface of die. The surface of the ideal sheet metal forming die must be. Light, i.e. relatively high finish, (a few microns, less than 1 micron in key places). Slip, i.e. relatively low friction coefficient, (preferably less than 0).

。堅，即有較深的，硬度比較高的近表麵層， (距表麵少1mm內，硬度不能太低。硬，即模具的表麵要有很高的表麵硬度， (大於如果模（mó）具表麵比較光滑，比（bǐ）如鍍硬鉻以後，模具（jù）和板材在衝壓成形時相互摩擦，比較不容易產生的大量的微粉末。產（chǎn）生（shēng）的微粉末， 也比較不（bú）容（róng）易滯留在模具表麵（miàn）上，有利於保持幹淨的模具表麵狀態。

Hard, i.e. there is a deep near surface layer with high hardness (the hardness shall not be too low within 1mm from the surface). Hard, i.e. the surface of the die shall have high surface hardness, (larger than if the die surface is relatively smooth, for example, after hard chromium plating, the die and plate rub against each other during stamping, which is less likely to produce a large amount of micro powder. The generated micro powder is also less likely to remain on the die surface, which is conducive to maintaining a clean die surface.

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