Hope the following picture of a stamping factory experience will help you understand what is fine blanking and what difference between fine blanking and common punching and blanking process for sheet metal parts.
Sheet metal fine blanking.
Fine blanking ensure stability regarding production with high quality and precision.
Blanking is a metal fabricating process during which a metal workpiece is removed from the primary metal strip or sheet when it is punched.
Progressive stamping rotary stamping high speed stamping metal forming fine blanking aluminum stamping stainless steel stamping and many other punching and blanking fabricating services with variety of.
Fine blanking permits 3 d composite processing including coining semi shearing bending and drawing.
It is also similar to stamping but differs in the sense that it uses two opposing dies to form the gear from sheet material.
For example disk or plane washers are manufactured using blanking operation.
Blanking produces the outside features of the component while piercing produces internal holes or shapes.
The web is created after multiple components have been produced and is considered scrap material.
After blanking operation the parts will be require secondary finish to smooth out burrs with bottom edge the fine blanking process is most method of blanking.
Image courtesy of dayton progress.
Detailed process introduction of punching and blanking.
As explained in the above image the blanking operation produces an enclosed part from a large piece of sheet metal.
Figure 1 when a punch makes contact with the sheet the metal begins to deform and bulge around the point of the punch.
Blanking and piercing are shearing processes in which a punch and die are used to produce parts from coil or sheet stock.
Home metal fabricating tips facts blanking process.
Fineblanking is a specialty type of metal stamping that can achieve part characteristics such as flatness and a full sheared edge to a degree that is nearly impossible using a conventional.
Fine blanking is similar to extrusion where the metal is extruded through die cavities to form the desired gear tooth geometry.
Shearing sheet metals the sheet metal blanking process is require such as blanking punch blanking die blanking press and sheet metal stock.
Place the metal sheet to be punched between the punching machine and the die.
Characteristics of the blanking process include.
The material that is removed is the new metal workpiece or blank.
The tooling of fine blanking clearance will affect the final stamped part burrs height.
The working principle fine blanking of a typical spur gear is presented in fig.
