This article throws light upon the eleven main operation of press working. The operations are: 1. Shearing Operation 2. Cutting-Off Operation 3. Parting. Different Types of Press Working Operations - Download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online. different. Press Working: 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.


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Cut-off tools can produce many parts. The required length of strip can be cut off for bending and press working operations operations using this tool. Parting off tool[ edit ] Partings are similar, in that a discrete part is cut from a sheet or strip of metal along a desired geometric path. The difference between a cutoff and a parting is that a cutoff can be nestled perfectly on the sheet metal, due to its geometry.

With cutoffs, the cutting of sheet metal can be done over one path at a time and there is practically no waste of material. With partings, the shape can not be nestled precisely.

Mechanical engineering: Press Working Operations

Parting involves cutting the sheet metal along two paths simultaneously. Partings waste a certain amount of material, that can be significant. Trimming tool[ edit ] When cups and shells press working operations drawn from flat sheet metal the edge is left wavy and irregular, due to uneven flow of metal.

Shown is flanged shell, as well as the trimmed ring removed from around the edge. While a small amount of Material is removed from the side of a component in trimming tool.

Trimming Tool Shaving tool[ edit ] Shaving removes a small amount of material around press working operations edges of a previously blanked stampings or piercing. A straight, smooth edge is provided and therefore shaving is frequently performed on instrument parts, watch and clock parts and the like.

Shaving is accomplished in shaving tools especially designed for the purpose.

Forming tool[ edit ] Forming is the operation of deforming a part in curved profile. Forming tools apply more complex forms to work pieces.

Main Operations of Press Working | Metallurgy

This operation is done with the help of die mounted on a crank press. In cutting operation the metal is subjected to both tensile and compressive stresses, as shown in Fig. The parting operation is shown in Fig. When the cutting takes place along two open curves or lines the operation is referred as parting.

The parting operation is not efficiently utilizing the material as in case press working operations cutting-off operation.

Main Operations of Press Working | Metallurgy

The wastage of stock is more compared press working operations the cutting-off operation. The blanking operation is shown in Fig. When the cutting takes place along a closed contour, the operation is known as blanking. The blanking operation results in a relativity high percentage of waste in stock material.

It is less efficient among all other cutting press working operations. An efficient layout of blanks on the metal sheet can result in considerable saving of metal. Also there is a limit to the minimum distance between two adjacent blanks i.

In blanking the part separated from the sheet metal is the product output and remaining sheet metal is the scrap metal.


This process is employed in mass production of blanks that press working operations be produced by shearing, cutting-off or parting operations. The punching operation is similar to the blanking operation only difference is that, the remaining part of sheet metal is the product output.

The blanks produced are wastage material punching of small hole patterns are referred as perforating.