Internal high pressure forming device and method and corresponding tool system

Device according to anyone of the preceding claims, in which there are means for guiding the die carrier components (3, 4).

Device according to anyone of the preceding claims, in which fluid chambers (8) which are respectively assigned to two different die halves (5a, 5b) are arranged opposite one another.

Device according to anyone of the preceding claims, in which each pair comprising piston component and associated piston-receiving component in each case forms a sealing unit which seals off each fluid chamber (8) in a pressure-tight manner.

Device according to anyone of the preceding claims, in which the means for producing the hydrostatic fluid chamber pressure (Pa) are configured in such a way that the fluid chamber pressure (Pa) which is produced in the fluid chambers (8) located opposite one another is in each case identical.

Device according to anyone of the preceding claims, in which the means for producing the fluid chamber pressure (Pa) are configured in such a way that the forces exerted on the two die halves (5a, 5b) by the fluid chamber pressure (Pa) are oppositely directed and are of equal magnitude.

Device according to anyone of the preceding claims, in which there is a control circuit for controlling the hydrostatic fluid chamber pressure (Pa) as a function of the force exerted on the corresponding die half (5a, 5b).

Device according to anyone of the preceding claims, in which the die carrier (2) is integrated in a clamping table for clamping the die halves (5a, 5b) in place.

Device according to anyone of the preceding claims, in which between the two die halves (5′a, 5′b) of the die (5′), in the die parting plane, there is a forming element (5′c), which together with each of the die halves (5′a, 5′b), in each case forms a forming chamber (6a, 6b) which can be acted on by a hydrostatic internal pressure for shaping purposes at in each case one workpiece which is to be deformed.

Hydroforming die arrangement (40-70), in which a plurality of dies, which are in each case divided into two die halves along a die parting plane, are arranged in a stacked arrangement in a direction which is perpendicular to the die parting planes,

• in which arrangement, during mounting of the die arrangement (40, 50, 60, 70) between in each case two adjacent die halves (41-71, 45-75, 46-76, 42-72) together with a workpiece which is to be deformed, a pressure chamber (A), which can be acted on by a hydrostatic internal pressure (Pi) for shaping purposes at the workpiece, is formed by the workpiece and one die half, and a deformation chamber (B) is formed by the workpiece and the other die half;
• and
• the deformation chamber (B) being in fluid communication, via the respectively adjacent die half, with the surroundings of the die arrangement (40-80), so that when pressure is applied to the pressure chamber (A), pressure is prevented from building up in the deformation chamber (B).

Hydroforming process, in which

• in at least one die (5), which is divided into two die halves (5a, 5b) along a die parting plane, at least one forming chamber (6), which is formed by the die halves (5a, 5b), is acted on by a hydrostatic internal pressure (Pi) for shaping purposes at a workpiece (7) which is to be deformed, and in which
• a hydrostatic fluid chamber pressure (Pa), which is in each case at least equal to the internal pressure (Pi) and, compensating for the hydrostatic internal pressure (Pi), exerts a die-closing force on the two die halves (5a, 5b), is produced in fluid chambers (8) which are formed from a piston component and a piston-receiving component and are each assigned to one of the die halves (5a, 5b)
• wherein in each case a plurality of adjacent fluid chambers (8) on opposite sides of the die (5) are partially and/or jointly acted on by an identical or different fluid chamber pressure (Pa).