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American Made - Case Studies


Nov 23, 2020

Sheet Metal Stamping & Sheet Metal Stamping Dies


Sheet Metal Stamping

Sheet metal stamping presses and stamping dies are tools used to produce high volume sheet metal parts. The press provides the force to close the stamping dies where they shape and cut the sheet metal into finished parts.

Production stamping is generally performed using sheet metal materials .020” to .080” thick, but the process also can be applied to foils as thin as .001” or to plate stock with thickness' approaching 1.000”. Formability is the primary attribute of sheet metal material.

Formability is further defined as the materials ability to be:

• bent

• stretched

• drawn

The metallurgical term for these qualities is “ductility”. Ductility is the materials ability to deform and elongate without fracture. The extent to which a stamping is subjected to such deformation is directly related to the part’s overall shape and geometry.

Other factors also influence the material’s formability. They include:

• the die design

• the press

• the press speed

• lubrication

• sheet metal feeding mechanisms

• monitoring and control systems

Sheet Metal Stamping Dies

The word “die” is a generic term used to describe the tooling used to produce stamped parts. A die set assembly consisting of a male and female component is the actual tool that produces the shaped stamping. The male and female components work in opposition to both form and punch holes in the stock. The upper half of the die set, which may be either the male or female, is mounted on the press ram and delivers the stroke action. The lower half is attached to an intermediate bolster plate which in turn is secured to the press bed. Guide pins are used to insure alignment between the upper and lower halves of the die set. 

The most common types of dies perform cutting and forming. Cutting dies are used to shear sheet material into what is called a blank. These blanks are then exposed to blanking dies which cut the entire perimeter of the part, or to forming dies where the blank is stamped into a part.

Punching is another function of cutting dies. Punching is the cutting of a slug from the sheet metal stock to produce a hole or slot. Cutting dies are also used to trim excess metal from around a formed part. Hole punching and other cutting operations require specific and carefully maintained clearances between the punch (male component) and the die (female component).

The setting of the required clearances is determined by both the stock thickness and temper. In general, die clearances increase as the stock thickness increases. The depth of punch penetration into the sheet metal stock will also increase as softer stock is used.

Forming is a general term used to describe a stamped part whose shape and contour is reproduced directly from the shape and contour of a die set.

The main forming operations accomplished with press mounted dies are:

• drawing

• bending

• flanging

• hemming

Category: General
Posted by: sheryl

Sheet Metal Stamping

Sheet metal stamping presses and stamping dies are tools used to produce high volume sheet metal parts. The press provides the force to close the stamping dies where they shape and cut the sheet metal into finished parts.

Production stamping is generally performed using sheet metal materials .020” to .080” thick, but the process also can be applied to foils as thin as .001” or to plate stock with thickness' approaching 1.000”. Formability is the primary attribute of sheet metal material.

Formability is further defined as the materials ability to be:

• bent

• stretched

• drawn

The metallurgical term for these qualities is “ductility”. Ductility is the materials ability to deform and elongate without fracture. The extent to which a stamping is subjected to such deformation is directly related to the part’s overall shape and geometry.

Other factors also influence the material’s formability. They include:

• the die design

• the press

• the press speed

• lubrication

• sheet metal feeding mechanisms

• monitoring and control systems

Sheet Metal Stamping Dies

The word “die” is a generic term used to describe the tooling used to produce stamped parts. A die set assembly consisting of a male and female component is the actual tool that produces the shaped stamping. The male and female components work in opposition to both form and punch holes in the stock. The upper half of the die set, which may be either the male or female, is mounted on the press ram and delivers the stroke action. The lower half is attached to an intermediate bolster plate which in turn is secured to the press bed. Guide pins are used to insure alignment between the upper and lower halves of the die set. 

The most common types of dies perform cutting and forming. Cutting dies are used to shear sheet material into what is called a blank. These blanks are then exposed to blanking dies which cut the entire perimeter of the part, or to forming dies where the blank is stamped into a part.

Punching is another function of cutting dies. Punching is the cutting of a slug from the sheet metal stock to produce a hole or slot. Cutting dies are also used to trim excess metal from around a formed part. Hole punching and other cutting operations require specific and carefully maintained clearances between the punch (male component) and the die (female component).

The setting of the required clearances is determined by both the stock thickness and temper. In general, die clearances increase as the stock thickness increases. The depth of punch penetration into the sheet metal stock will also increase as softer stock is used.

Forming is a general term used to describe a stamped part whose shape and contour is reproduced directly from the shape and contour of a die set.

The main forming operations accomplished with press mounted dies are:

• drawing

• bending

• flanging

• hemming