PRESS WORKING TERMINOLOGY

Press working may be defined as, a manufacturing process by which various components are made from sheet metal. This process is also termed as cold stamping. The machine used for press working is called a press.

A simple cutting die used for punching and blanking operation as shown:



1: Bed:
The bed is the lower part of the press frame that serves as a table to which a
Bolster plate is mounted.

2: Bolster Plate:
This is a thick plate secured to the press bed , which is used for locating and
supporting the die assembly. It is usually 5 to 12.5 cm thick.

3: Die Set:
It is unit assembly which incorporates a lower and upper shoe, two or more 
guide parts and guide part bushings.

4: Die Block:
It is a block or a plate which contains a die cavity.

5: Lower Shoe:
The lower shoe of the a die set is generally mounted on the bolster plate of   
press. The die block is mounted on the lower shoe, also the guide post 
are mounted on it.

6: Punch :
This is male component of  a die assembly, which is directly or indirectly 
moved by and fastened to the press ram or slide.

7: Upper Shoe:
This is the upper part of the die set which contains guide post bushings.

8: Punch Plate :
The punch plate or punch retainer fits closely over the body of the punch and 
holds it in proper relative position.

9: Back up Plate:
Back up plate or pressure plate is placed so that intensity of pressure does
not become excessive on punch holder. The plate distributes the pressure
over a wide area and the intensity of pressure on the punch holder is reduced
to avoid crushing.

10: Stripper:
It is a plate which is used to strip the metal strip from cutting a non-cutting
Punch or die. It may also guide the sheet.

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