Process for producing a bent, tubular preliminary product made of metal for the internal high pressure forming of components and tool for producing such a preliminary product

摘要

The invention relates to a method for producing a bent, tubular preliminary product made of metal for the internal high pressure forming of components, comprising the steps: Bending tool- preforming of the bent blank with at least one forming tool, with which a locally limited change in cross-section with respect to the longitudinal extension of the blank is introduced into the bent blank- inserting the preliminary product thus produced into an internal high-pressure forming tool- internal high-pressure forming of the preliminary product thus produced into a component The step of bending and preforming in a single integrated manufacturing stage is carried out using a combination tool.