Method and device for securing components on peripherally closed hollow profiles

Abstract

The invention relates to a method for fixing components (2) to peripherally closed hollow profiles (3). Walls (4,5) of the component (2) and the hollow profile (3) are connected to each other in a positive fit. In order to fix the component (2) to the hollow profile (3) in a simple manner, independent or position, the walls (4,5) to be joined are placed in an adjacent position and are locally impinged upon by external pressure such that the walls (4,5) a repressed inside (12) the hollow profile (3) and a double-walled indentation (10) is formed, wherein the walls (4,5) are clamped against each other.

Description

BACKGROUND AND SUMMARY OF THE INVENTION [0001] The invention relates to a method for fastening components to initially closed hollow profiles, and a device for that purpose. [0002] DE 196 19 626 C2 discloses a device in which hangers are affixed to a hollow profile such that both the hanger and the hollow profile are placed in engravings of a high internal pressure forming tool and then the section is subjected to a high internal fluid pressure. Under this pressure the material of the hollow profile flows radially outward and at the location of the hanger it flows conformingly around the surface of the hanger which has an undercut shape so that an interlocking bond is established between the hanger and the hollow profile. The described fastening of the hanger to the hollow profile is possible, however, only within the expanded area between the axial sealing and punches that close the ends of the hollow profile. Furthermore, the flexibility of the method is limited by the fact that t...

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Benefits of technology

[0002] DE 196 19 626 C2 discloses a device in which hangers are affixed to a hollow profile such that both the hanger and the hollow profile are placed in engravings of a high internal pressure forming tool and then the section is subjected to a high internal fluid pressure. Under this pressure the material of the hollow profile flows radially outward and at the location of the hanger it flows conformingly around the surface of the hanger which has an undercut shape so that an interlocking bond is established between the hanger and the hollow profile. The described fastening of the hanger to the hollow profile is possible, however, only within the expanded area between the axial sealing and punches that close the ends of the hollow profile. Furthermore, the flexibility of the method is limited by the fact that the shape of the high internal pressure forming tool permanently establishes the shape and location of the bond, so that in the case of different requirements as to the position and kind of the interlocking bond different tools are necessary. The result is great expense and investment in the device.

[0003] The invention is addressed to the task of improving a method of that kind and a device also of that kind so

Problems solved by technology

Furthermore, the flexibility of the method is limited by the fact that the shape of the high internal pressure forming tool permanently establishes the shape and location of the bond, s

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