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Stamping

Deep Drawn & Metal

What is Deep Drawn?

When depth of the draw is naturally greater than its diameter, then that type of metal stamping is known as deep drawing. While preparing, it is likely to produce long, narrow, cylindrical parts with a length that is significantly larger than the outside diameter of the part.

Stamping is a universal term that involves a broad range of metal forming abilities and industrial usages. Parts produced by metal stamping can range from 0.25 inches in diameter or lesser, to very huge aircraft, automotive and appliance parts. Occasionally referred to as metal pressing, it is classified as a cold forming or cold working process, which means it is usually done at room temperature.

The Deep Drawn Stamping Process

The stamping process is known deep drawn stamping, or deep draw, when a part is pulled (drawn) into a die cavity and the depth of the recess equals or surpasses the minimum part width. Deep drawing uses radial tension-tangential compression to shape the metal.

This procedure transforms flat sheet metal, or blank, into a hollow vessel that might be cylindrical or box-shaped, with straight or tapered sides or a mixture of straight, tapered and curved sides. The vessel is then redrawn with a series of dies, reducing its diameter and increasing its length with minimal change to the wall thickness.

Deep Draw Stampings Variations

This form of stamping typically involves other forming operations to complete the part such as: Beads, Ribs and Flanges: frequently used to impart rigidity to a part which otherwise might be too flexible and weak.

Their cautious use may reduce essential material thickness by as much as 50%.

Bulging:

The procedure of expanding the walls of a cup, shell or tube with an internally expanding segment punch or a punch composed of air, liquids, semi-liquids or of rubber and other elastomers; this expansion may be symmetrical or non symmetrical.

Coining:

A closed-die squeezing procedure in which all surfaces of the work are confined or restrained.

Curling:

Forming a rolled edge at the open end of a part.

Dimpling:

Localized indent forming, so as to permit the head of a rivet or a bolt to fasten down flush with the surface of the metal.

Embossing:

A procedure that produces comparatively shallow indentations or raised designs with no substantial change in metal thickness.

Extruding:

Turning up or drawing out a flange around a smaller hole; also called “hole flanging.”

Holes:

A shaped portion of metal is cut from the drawn part using conventional, extruding, or piercing punches.

Ironing:

Procedure in which the thickness of the shell wall is reduced and its surface smoothed.

Marking:

Procedure to add identification such as numbers, letters or graphics to a part.

Necking:

Reducing the diameter of a portion of the length of a cylindrical shell.

Notches:

Shaped notches that are cut from the edge of the part; generally provided for clearance, locating or attaching.

Threading:

Threads are shaped on a part using a wheel and arbor, tap or die.

Trimming:

Cutting scrap off a partly or fully shaped part to an established trim line.

Altido specializes in drawn metal cases in a wide range of materials and shapes. Sizes range from 0.125 to 12.0 inches wide, and up to 12.0 inches deep.