There are several embossing types. Before passing the embossing types, we should define the embossing. Embossing is a forming process in which a high pressure is applied to a workpiece to change its surface. Depending on the shape, a distinction is made between hollow embossing and solid embossing.
Hollow Embossing: In hollow embossing, the thickness of the raw material is retained during forming. A depression on one side faces a bump on the other side of the workpiece. Hollow embossing is used for the production of sheet metal parts of all kinds, e.g.,
Solid Embossing: In solid embossing the thickness of the raw material is changed during forming. A depression on one side does not match a bump in the corresponding size on the other side of the workpiece. Solid embossing is used, among other things, in the production of coins, the embossing of inscriptions and marks, as well as in the production of components of mechanical engineering and the electrical industry. In solid embossing, a distinction is made between full embossing, sizing, and compression surface finishing:
- Full Embossing: Embossing into the smooth surface of a completely undeformed blank.
- Sizing: Embossing an already preformed blank to increase its dimensional accuracy. The method is often used in automobile construction to calibrate forged metal parts.
- Compression Surface Finishing: Embossing a bent or warped part to flatten or straighten it. Embossing a grid pattern (rough flattening) will not only achieve a highly accurate planarity but also help to relieve stress. Parts can also be straightened by feeding them through flat parallel plates although this will result in lower
accuracy in comparison to rough flattening.
Advantages of Embossing Process:
- Optimal Characteristics of the Atomic Structure
- Material and Production Time Savings
- High Precision
- High Surface Quality
Machines for Embossing: Friction presses, blow forging presses, toggle lever presses, and hydraulic presses are used for embossing.
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