Paper Titles
Deformation Behaviour of Sheet Metals in Laser Assisted Hydroforming Processes
p.361
Improvement of Formability in Tube Hydroforming by Reduction of Friction with a High Viscous Fluid Flow
p.369
Active Material Flow Control during High-Pressure Sheet Metal Forming
p.377
Die Surface Structures and Hydrostatic Pressure System for the Material Flow Control in High-Pressure Sheet Metal Forming
p.385
Integrated Manufacturing by Hydroforming, Laser Welding and Cutting
p.393
3D Ultrasonic Imaging for Sheet Metal Hydroforming
p.401
Non-Traditional Forming Limit Diagrams for Incremental Forming
p.409
Influence of an Incremental Deformation on Material Behaviour and Forming Limit of Aluminium Al99,5 and QT-Steel 42CrMo4
p.417
Laserforming of 3D Features
p.425

Integrated Manufacturing by Hydroforming, Laser Welding and Cutting

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Abstract:

The shortening of process chains and the combination of innovative manufacturing technologies offer the possibility to enhance the complexity of technical products. The presented work describes the development of a process chain for the manufacturing of complex hollow parts out of double sheets and tubes with a big variation of the cross section, e.g. for A-pillars in the automotive sector. Two blanks and a tube are inserted in a hydroforming tool by a handling robot. The processes forming of blanks and tubes as well as joining by clinching are integrated in this tool. After these steps, the handling robot places the part in a laser station, where integrated laser welding and cutting processes take place. This paper focuses on special solutions developed both in the hydroforming and in the laser processing. In particular, the connection between blanks and tube is extremely problematic with regard to the sealing in the hydroforming process and the welding operations due to an existing gap. The requested tightness is reached by reinforcing the tube in the connection area with a ring insert, by placing sealing profiles on the outer surface of the tube and particularly by adding a sealing medium to the hydroforming fluid. In laser operations, special challenges result from complex welding and cutting paths, contaminations of the blanks with hydroforming media and lubricants, gaps between the blanks that occur due to residual stresses after forming and burr formation.

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Periodical:

Advanced Materials Research (Volumes 6-8)

Pages:

393-400

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.6-8.393

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Online since:

May 2005

Authors:

O. Kreis, M. Celeghini, Marion Merklein

Keywords:

Hydroforming, Laser, Process

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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