Deep Drawn

LBE customers have used our deep drawing capabilities to produce small watertight aluminum enclosures for ABS brake systems. Deep drawing is a sheet metal forming process that uses dies, punches and presses to form enclosures that are seamless on most sides. For example, thin walled aluminum cans for drinks are made this way.

Aluminum Box — Deep drawn waterproof aluminum box for ABS brakes for commercial trucks.

Aluminum Case — Deep Drawn, Aluminum case (shown) stainless steel also available.

Brake Controller Housing — Aluminium deep drawn electronic brake controller housing. PEM nuts and standoffs added as post operation.

What is the Deep Drawn method?

Deep drawing is a sheet metal forming process in which a sheet metal blank is radially drawn into a forming die by the mechanical action of a punch. It is thus a shape transformation process with material retention. The process is considered "deep" drawing when the depth of the drawn part exceeds its diameter. This is achieved by redrawing the part through a series of dies. The flange region (sheet metal in the die shoulder area) experiences a radial drawing stress and a tangential compressive stress due to the material retention property. These compressive stresses (hoop stresses) result in flange wrinkles (wrinkles of the first order). Wrinkles can be prevented by using a blank holder, the function of which is to facilitate controlled material flow into the die radius.

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