Intermediate shell for a motor vehicle door, method for producing an intermediate shell, and a door for a motor vehicle

Abstract

An intermediate shell for a motor vehicle door, in particular a side door of a motor vehicle, is disclosed. The intermediate shell is produced at least in regions from a light metal blank by massive forming, preferably by forging.

Claims

1. A method for producing an intermediate shell for a side door of a motor vehicle, comprising the steps of: producing the intermediate shell in one piece from a metal blank by forging, wherein the intermediate shell includes a lower frame part, a window frame, and a belt line; locally adjusting a mechanical strength in the intermediate shell in a region by collecting fibers in the region during the forging, wherein the mechanical strength of the region is greater than a mechanical strength of another region of the intermediate shell; and forging on the intermediate shell a side impact brace and a connection element.

2. The method according to claim 1, wherein the metal blank is a metal alloy.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The single FIGURE shows a schematic view of one exemplary embodiment of an intermediate shell for a motor vehicle door.

DETAILED DESCRIPTION OF THE DRAWING

(2) The single FIGURE shows a depiction of an exemplary embodiment of an intermediate shell 1 for a motor vehicle door, wherein the intermediate shell 1 is formed for the side door of a passenger motor vehicle.

(3) The intermediate shell 1 comprises a door frame 2 or a lower frame part 3, a window frame 5 as well as a belt line 7.

(4) Preferably, the intermediate shell 1 is forged in one piece from a light metal blank, wherein the lower frame part 3, the window frame 5 and the belt line 7 are formed from the light metal blank during forging. Therein, the intermediate shell 1 is particularly preferably produced by die forging, in particular by forming of the light metal blank between an upper and a lower die block.

(5) Preferably, a hinge reinforcement 9 and a lock reinforcement 11 are forged to the intermediate shell 1, wherein these are preferably re-forged in regions with the material of the intermediate shell 1.

(6) Alternatively, it is possible for the hinge reinforcement 9 and the lock reinforcement 11 to be forged in one piece on the intermediate shell 1.

(7) Overall it is gleaned that an intermediate shell 1 is able to be produced by means of the method which has improved component properties with regard to its tensile strength, yield strength, elongation at break and ductility, wherein at the same time lightweight construction can be operated. Thus it is possible to produce a particularly light and at the same time stable door for a motor vehicle without a great effort and without extensive reworking.