Daimler Chrysler Ag

Hartmut Hoffmann

Volker Thoms

Arno Jambor

Franz Guetlbauer

Andreas Poellmann

Franz Guetelbauer

Roland Golle

A process for connecting at least two components, particularly body components of motor vehicles, wherein the first component has an undercut on a side facing the second component. In the area of the undercut, a connection piece is cast to the first component. The connection piece is designed such that, during its solidification, the connection piece is firmly connected with the first component by the contraction of a last-solidifying core area of the connection piece. Then the second component is mounted on the connection piece.

Process and system for connecting at least two components

Process and a system for connecting at least two components

A device for continuous. casting of workpieces has a melting crucible, a filling device, and a forming tool provided with a temperature control system. The temperature control system of the forming tool is designed so that areas of the workpiece to be manufactured that have a greater wall thickness can be cooled to a greater degree and areas of the workpiece to be manufactured with a lesser wall thickness can be cooled to a lesser degree and/or heated. The solid-liquid interface of the workpiece is located in a plane that is at least approximately perpendicular to the vertical axis of the workpiece.

Device and method for continuous casting of workpieces

The invention relates to drawn pieces made of steel plate, particularly for motor vehicles bodies, and to a process for manufacturing such drawn pieces. In order to be able to manufacture drawn pieces with a high piece strength but of a low weight and with a low susceptibility to denting in a simple manner, according to the invention, a spring steel plate which is already hardened in the initial state, particularly bainitized&mdash;for example, CK60 or C63 or 67SiCr5&mdash;is used during the drawing of the vehicle body parts. The yield point of the heat-treated plate bar material is approximately in the range of from 800 to 1,800 N/mm ; the tensile strength is above that. Because of these strength values, plate bars of a plate thickness of approximately 0.3 mm to 0.6 mm can be used, whereby approximately 20 to 60% of the previous piece weight can be saved. The drawn piece according to the invention is therefore a definite lightweight part. In addition to being bainitized, the spring steel plate can be mechanically hardened, for example, by cold rolling or by a heat treatment.

Deep-drawn parts made of spring sheet steel which are especially used as a lightweight structural member or vehicle body part, and a method for the production thereof

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Bad Wimpfen, Germany

Hartmut Hoffmann