Method of manufacturing a lightweight composite automotive door

Metal working – Method of mechanical manufacture – Structural member making

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29530, 2989733, B23P 1700

Patent

active

049225960

ABSTRACT:
A lightweight, composite beam for reinforcing a vehicle door is provided. The reinforcing beam comprises an open channel-shaped metal member having a longitudinal cavity which is filled with a reinforcing polymeric material which in one aspect is a thermoset or thermoplastic resin-based material. The composite beam includes end pieces which are adapted to be mounted to a vehicle door panel in a door cavity by spot-welds or the like. The horizontally mounted beam provides substantially increased resistance to side impacts to the vehicle door in the event of a collision. In one embodiment, the beam is mounted between the window glass space and the inner door panel for flush-glass vehicle doors. In another configuration, one surface of the beam is sculptured to mate with a concise outer door panel.
A method of making the reinforcing beam of the present invention is also provided which in one aspect includes cutting a sheet metal blank which is then bent to form a channel-shaped member having a longitudinal cavity. End mounting pieces integral with the beam are formed as the longitudinal cavity is filled with reinforcing material.

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