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.

衝壓成形模具的表麵處理很重要（yào），因為衝壓件隻跟模具的表麵打交道。理想的金屬板材成形模具的（de）表麵，必須是。光（guāng）， 即比較高的光潔度，(幾微米，關鍵的地方小（xiǎo）於1微米。滑， 即比較低的摩擦（cā）係數， (最好小於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（gāo）的近表麵層， (距表麵至少1mm內，硬度不能（néng）太低。硬，即模具的表麵要有很高的（de）表麵硬度， (大於如果模具表麵比較光滑，比如（rú）鍍硬（yìng）鉻以後，模具（jù）和板材（cái）在（zài）衝壓成形時相互摩擦，比較不容易（yì）產生的大量的（de）微粉末（mò）。產生（shēng）的微粉末， 也比較不容易滯留在（zài）模（mó）具（jù）表麵上，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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