Fine Blanking Process Sheet Metal

Blanking and piercing are shearing processes in which a punch and die are used to produce parts from coil or sheet stock.

Fine blanking process sheet metal.

It is also similar to stamping but differs in the sense that it uses two opposing dies to form the gear from sheet material. 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 metal cutting or punching process. For example disk or plane washers are manufactured using blanking operation. A die cut edge normally has four attributes.

The fine blanking provides parts having smooth edge better flatness and high tolerance. Punch direction press counter punch force compressive stress. The terms piercing and punching can be used interchangeably. The working principle fine blanking of a typical spur gear is presented in fig.

Fine blanking is a fully automated precision metal working stamping process. Fine blanking ensure stability regarding production with high quality and precision. The blanking process forces a metal punch into a die that shears the part from the larger primary metal strip or sheet. The blanking process requires a blanking press sheet metal stock blanking punch and blanking die.

Blanking produces the outside features of the component while piercing produces internal holes or shapes. Most of the equipment and setup for fine blanking is similar to conventional blanking. Blanking operation in sheet metal as explained in the above image the blanking operation produces an enclosed part from a large piece of sheet metal. The illustration that follows provides a two dimensional look at a typical blanking process.

In fineblanking the manufactured product needs to have a full contact surface on the edge of the part. Fine blanking is similar to extrusion where the metal is extruded through die cavities to form the desired gear tooth geometry. The slugs produced by piercing internal features are also considered scrap. A typical fine blanking tool is a single station compound tool for producing a finished part in one press stroke.

As a result the blank part is used as the final product. Closing force counterpressure and blanking pressure forces are individually and infinitely adjustable. The web is created after multiple components have been produced and is considered scrap material. Which blanking process sheared the sheet metal in three type of force separately applied.

The only addition operation needed is the removal of a slight burr. The process requires a triple action fine blanking press. The sheet metal stock is placed over the die in the blanking press. The die instead of having a cavity has a cutout in the shape of the desired part and must be custom made unless a standard shape is being formed.

Fine blanking process is one the specialize type of process. Fine blanking is a high precision metal forming process used extensively in the automotive heavy duty electronics medical lawn and garden and general industrial industries.