technology of deep drawing
stamping is a general term that encompasses a broad range of metal forming capabilities and industrial uses.
technology of deep drawing
Parts produced by metal stamping can range from 0.25 inches in diameter or smaller, to very large aircraft, automotive and appliance parts.
Sometimes referred to as metal pressing, it is classified as a cold forming or cold working process, meaning it is usually done at room temperature.
The stamping process is considered deep drawn stamping, or deep draw, when a part is pulled (drawn) into a die cavity and the depth of the recess equals or exceeds the minimum part width.
Technology of deep drawing is always accompanied by other forming techniques within the press. These other forming methods include:
Beading: Material is displaced to create a larger, or smaller, diameter ring of material beyond the original body diameter of a part, often used to create O-ring seats.
Bottom piercing: A round or shaped portion of metal is cut from the drawn part.
Bulging: In the bulging process a portion of the part’s diameter is forced to protrude from the surrounding geometry.
Coining: Material is displaced to form specific shapes in the part. Typically coining should not exceed a depth of 30% of the material thickness.
Curling: Metal is rolled under a curling die to create a rolled edge.
Extruding: After a pilot hole is pierced, a larger diameter punch is pushed through, causing the metal to expand and grow in length.
Ironing / Wall Thinning: Ironing is a process to reduce the wall thickness of parts. Typically ironing should not exceed a depth of 30% of the material thickness.
necking: A portion of the part is reduced in diameter to less than the major diameter.
Notching: A notch is cut into the open end of the part. This notch can be round, square, or shaped.
Rib forming: Rib forming involves creating an inward or outward protruding rib during the drawing process.
Side piercing: Holes are pierced in the side wall of the drawn part. The holes may be round or shaped according to specifications.
stamping / Marking: This process is typically used to put identification on a part, such as a part number or supplier identification.
Threading: Using a wheel and arbor, threads are formed into a part. In this way threaded parts can be produced within the stamping press.
Trimming: In the trimming process, excess metal that is necessary to draw the part is cut away from the finished part.
Marking: process to add identification such as numbers, letters or graphics to a part.
Holes: a shaped portion of metal is cut from the drawn part using conventional, extruding, or piercing punches
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.