Abstract: A bumper having crash-boxes accommodated at least in part by space in a hollow cross beam section. As a result, when impact due to collision occurs, deformation of the crash-box takes place early, so that for the same outer dimensions of the bumper longer crash-boxes can be employed. This is of advantage as the energy absorbed by the compression of the cross beam is small in relation to the mass employed and the distance traversed compared with the that achieved with crash-boxes. The capacity to absorb energy exhibited by the proposed bumper is therefore greater than that achieved by conventional bumpers.

Abstract: A method for manufacturing bent hollow bodies with inner and outer arcs forming inner arc wall regions and outer arc wall regions. The method including bending a starting hollow body, and, using at least one high internal pressure (HIP) forming process step, transforming the hollow body in an HIP tool to a final cross-sectional shape. The starting hollow body exhibits a readily bent cross-section at least in a region to be bent, in which by means of specific cross-sectional shaping, wall material lies closer to a neutral stress plane with reference to bending stresses than in the final cross-sectional shape. The HIP tool has a slide element.

Abstract: A process for forming an initial section or like component featuring a hollow interior to a final shape by high internal pressure in the sealed hollow interior using a medium that can flow. In order to shape-form the initial section featuring at least one corner region—preferably at least two corner regions—the wall sections adjacent to the corner region are preshaped in a curved manner—as viewed in cross-section—counter to the direction of applied pressure, and subsequently re-shaped by applying the high internal pressure of the medium that can flow, displacing the corner region in the direction in which the pressure is applied. To that end a section with hollow space delimited by section walls is employed in which two section walls define each corner region of the section cross-section, whereby at least one of the section walls at the corner region features a region that is curved in cross-section.

Abstract: A device for forming a single or mutli-chamber workpiece by high internal pressure created by a medium capable of flow in the hollow interior of the workpiece. The device contains a forming tool with a cavity accommodating the workpiece and pressure generating equipment for generating the high internal pressure. The pressure generating equipment contains a displacement pump with a pressure converter having a longitudinally coupled displacement body with different working surface areas A1, A2, which operates with a stroke frequency f, whereby strokes of the pressure converter cause a pressure p1 created on the primary side to be raised until a higher secondary pressure p2 is reached on the secondary side.

Abstract: A process for forming a starting profile with a profile cavity by a bending forming process and an internal high pressure produced in a sealed profiled cavity by way of a fluid, including the steps of initially, before forming by internal high pressure, forming a starting profile at a distance from free ends of the starting profile and across a longitudinal axis of the starting profile into a cross-section with favorable bending properties, by one of transversely inwardly bent side walls of the starting profile, folding during bending, flat pressing or a flat high-sided profile produced in an extrusion process.

Abstract: The invention relates to a method for shaping an initial profile (16a) or a similar workpiece, which comprises a profile space, into a final profile by using an internal high pressure that is generated in the sealed profile space by a flowable active medium. In order to shape the initial profile (16a) comprising at least one corner area (28n), preferably at least two corner area (28n), wall sections (34) which connect in the corner area (28n) are preshaped such that their cross-sections are curved counter to the direction of pressure, and are subsequently straightened by the internal high pressure of the flowable active medium while displacing the corner area (28n) in a direction of pressure.

Abstract: A process for forming an initial section or like component featuring a hollow interior to a final shape by means of high internal pressure in the sealed hollow interior using a medium that can flow is such that, in order to shape-form the initial section featuring at least one corner region—preferably at least two corner regions—the wall sections adjacent to the corner region are pre-shaped in a curved manner—as viewed in cross-section—counter to the direction of applied pressure, and subsequently re-shaped by applying the high internal pressure of the medium that can flow, displacing the corner region in the direction in which the pressure is applied. To that end a section with hollow space delimited by section walls is employed in which two section walls define each corner region of the section cross-section, whereby at least one of the section walls at the corner region features a region that is curved in cross-section.

Abstract: The invention relates to a device for forming a single or multi-chamber workpiece (42) by means of high internal pressure created by a medium capable of flow in the hollow interior (5) of the workpiece. The device contains a forming tool (4) with a cavity accommodating the workpiece (42) and pressure generating equipment (1) for generating the high internal pressure. The pressure generating equipment (1) contains a displacement pump with pressure converter comprising a longitudinally coupled displacement body with different working surface areas A1, A2, which operates with a stroke frequency f, whereby strokes of the pressure converter cause a pressure p1 created on the primary side to be raised until a higher secondary pressure p2 is reached on the secondary side.