What is Sheet Metal Embossing? (And how it is done?)

Sheet Metal Embossing

What is Sheet Metal Embossing?
Sheet metal embossing is a metal forming operation in which the sheet metal is stretched into a shallow depression.

Sheet metal embossing is generally used to create logos, lettering, small depressions, etc. It is also used to create desired non-slip surfaces as well as other geometric features on the sheet metal.

In sheet metal embossing, the deformation of the metal takes place because of stretching of the metal (or tensile force acting on the metal), due to which the sheet metal is subjected to excessive thinning and fracturing.

Thus the depth to which the material is depressed depends upon the thickness of the sheet as well as stretchability of the material.

Embossing is generally used to make dimples on sheet metal to increase their rigidity as well as it is also used for decorative purposes on panels in houses or other places.

3 things to control during the embossing of sheet metal

  1. Pressure: Pressure applied to the sheet metal should be controlled during embossing.
  2. Heat: Heat level should be maintained consistently during the embossing to get the perfect impressions.
  3. Die depth: The depth of the die should be adjusted such that the extreme thinning or failure of sheet metal does not occur.

These three factors mostly determine the quality of the embossed product.

During the embossing of sheet metal, the metal sheet is drawn through the male and female roller dies, which ultimately produces a pattern or design on it. 

Various types and shapes of dies are used to obtain the desired embossment on the metal sheet.

The combination of pressure and heat is like the principle of ironing the cloth, but here the sheet is depressed instead of straightening.

Characteristics of metal embossing

  1. Embossing has an ability to form (change the shape) of ductile metals.
  2. Embossing operations can be used for high production purposes too.
  3. The embossing operation has the ability to maintain the same metal thickness before and after the embossing operation.
  4. It has the capability to produce longer lengths of embossed sheets.

The embossed sheet shows the same pattern on the top side as well as bottom side.

The example of embossing is the roller shutter doors that you might have already seen.

Metal Embossing

For the embossing operation, following metals can be easily embossed.

  • Aluminum (and its alloys)
  • Brass
  • Copper
  • Zinc
  • Steel (and its alloys)
  • Hot rolled steel
  • Cold rolled steel
  • Galvanized steel
  • High-strength low-alloy steel

External links:
Roller shutter door: Image by Kai3952, CC BY-SA 4.0, via Wikimedia Commons

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