Fine Blanking Process Sheet Metal

The illustration that follows provides a two dimensional look at a typical blanking process.

Fine blanking process sheet metal.

The fine blanking provides parts having smooth edge better flatness and high tolerance. Fine blanking process is one the specialize type of process. The slugs produced by piercing internal features are also considered scrap. 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.

Fine blanking is similar to extrusion where the metal is extruded through die cavities to form the desired gear tooth geometry. Blanking and piercing are shearing processes in which a punch and die are used to produce parts from coil or sheet stock. The web is created after multiple components have been produced and is considered scrap material. The sheet metal stock is placed over the die in the blanking press.

The blanking process requires a blanking press sheet metal stock blanking punch and blanking die. In fineblanking the manufactured product needs to have a full contact surface on the edge of the part. The terms piercing and punching can be used interchangeably. Fine blanking is a fully automated precision metal working stamping process.

As a result the blank part is used as the final product. Fine blanking permits 3 d composite processing including coining semi shearing bending and drawing. 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. The process requires a triple action fine blanking press.

The working principle fine blanking of a typical spur gear is presented in fig. Fine blanking ensure stability regarding production with high quality and precision. 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. It ranges from 0 0003.

Which blanking process sheared the sheet metal in three type of force separately applied. Blanking produces the outside features of the component while piercing produces internal holes or shapes. It is also similar to stamping but differs in the sense that it uses two opposing dies to form the gear from sheet material. The blanking process forces a metal punch into a die that shears the part from the larger primary metal strip or sheet.

A die cut edge normally has four attributes. The only addition operation needed is the removal of a slight burr. Initially the gear blank in the form of a sheet is compressed between the blank holder and die. Most of the equipment and setup for fine blanking is similar to conventional blanking.

A typical fine blanking tool is a single station compound tool for producing a finished part in one press stroke. For example disk or plane washers are manufactured using blanking operation.