Abstract: A method of producing a composite component, in which a hollow section is expanded, at least in regions, by internal high pressure. In a first step a region of the hollow section is expanded until it comes to lie against an edge region of a cavity of a combined hydroforming and injection mold. In a second step the cavity is filled with an injection molding compound. In a third step the hollow section, at least in regions, is expanded further, which increases the internal high pressure.

Abstract: In a method and apparatus for producing a composite component comprising a hollow profile and at least one injection-molded element, a hollow profile (3) is formed by means of internal high pressure fluid forming and is encapsulated with an injection molding material to form the injection-molded element. The hollow profile is expanded by means of internal high pressure in a closed combination tool comprising an internal high pressure forming tool element and an injection molding tool element, before it is encapsulated. The hollow profile is pressed on the tool engraving only locally in the region of the location to be encapsulated, keeping the outlet of the injection molding channel opening into the tool engraving clear.

Abstract: In a method and apparatus for producing a composite component, a tubular hollow section blank is placed into a die cavity of a combination tool comprising an inner high-pressure shaping tool and an injection-molding tool. The combination tool is filled with a fluid in such a way that the blank is wetted from the inside by the fluid, and the ends of the combination tool are sealed by two axial molding plugs. The filled blank is then expanded under pressure . The finished hollow section is plastic-coated in the same tool. The hollow section is emptied after shaping in the sealed state, at least until it is no longer dripping, the pressurized fluid being expelled under pressure from the hollow section through at least one discharge channel formed in the axial molding plugs.

Abstract: A method of producing a composite component, in which a hollow section is expanded, at least in regions, by internal high pressure. In a first step a region of the hollow section is expanded until it comes to lie against an edge region of a cavity of a combined hydroforming and injection mold. In a second step the cavity is filled with an injection molding compound. In a third step the hollow section, at least in regions, is expanded further, which increases the internal high pressure.

Abstract: In a method and apparatus for producing a composite component comprising a hollow profile and at least one injection-molded element, a hollow profile (3) is formed by means of internal high pressure fluid forming and is encapsulated with an injection molding material to form the injection-molded element. The hollow profile is expanded by means of internal high pressure in a closed combination tool comprising an internal high pressure forming tool element and an injection molding tool element, before it is encapsulated. The hollow profile is pressed on the tool engraving only locally in the region of the location to be encapsulated, keeping the outlet of the injection molding channel opening into the tool engraving clear.

Abstract: The invention relates to a method and device (1) for producing a composite component, wherein a tubular, hollow section blank (5) is placed into the die cavity (3) of a combination tool comprising an inner high-pressure shaping tool (2) and an injection-molding tool, the combination tool is filled with a fluid in such a way that the blank (5) is wetted from the inside by the fluid, and the ends of the combination tool are sealed by two axial molding plugs (6 and 7). The filled blank (5) under pressure is then widened. The finished hollow section (22) is then plastic-coated in the same tool. In order to produce the composite component in a relatively simple manner and by a reliable process, it is suggested to empty the hollow section (22) after shaping in the sealed state at least until it is no longer dripping, wherein the pressurized fluid (19) is expelled under pressure from the hollow section (22) through at least one discharge channel formed in the axial molding plugs (6 and 7).

Abstract: The invention relates to a forming die having a cavity which forms a shaping space and into which a workpiece can be introduced. A passage, which connects the shaping space to the area surrounding the die, runs within the forming die. To achieve a contour during the shaping of the workpiece which is unaffected by the arrangement of passages connecting the shaping space to the area surrounding the die in a simple way, it is proposed that the die contains a liquid-permeable and gas-permeable insert body, which is held in a recess of the die near to the shaping space and by means of a peripheral region facing the shaping space forms a section of the cavity, and that the passage opens out at the insert body outside this peripheral region.

Abstract: The present invention relates to a method of producing a hollow profile which has at least one flange by internal high pressure forming. During the internal high pressure forming, the dimensions and the position of the flange are not changed relative to the finished hollow profile then formed.

Abstract: A device for producing an essentially T-shaped hollow profile or a hollow profile provided with at least one branch. The device may have a multipart mold which is intended for internal high pressure forming, in which a hollow profile having at least one initially dome-like branch can be produced. The device may also have a tool at the branch, this tool being designed for opening the branch at the end face after the forming operation. The tool is designed as a cutting device having a parting slide displaceable essentially transversely to the axis of the branch.

Abstract: A method is provided for producing peripherally closed hollow profile section using fluidic internal high pressure. A hollow profile section blank is inserted into a cavity of an internal high pressure forming tool and thereafter being pressed mechanically into an intermediate form approximate to the final form of the hollow profile section, after which, with the tool closed, the intermediate form of the blank is expanded into the final form of the hollow profile section. The blank used in terms of its peripheral length, possesses oversize with respect to the peripheral length of the forming tool cavity. Moreover, the blank material which is excess with respect to the blank material required for the hollow profile section blank to come to bear completely against the cavity of the forming tool is pushed into the blank interior, so as to form an indentation, at the earliest during the pressing operation.

Abstract: A device for producing an essentially T-shaped hollow profile or a hollow profile provided with at least one branch. The device may have a multipart mold which is intended for internal high pressure forming, in which a hollow profile having at least one initially dome-like branch can be produced. The device may also have a tool at the branch, this tool being designed for opening the branch at the end face after the forming operation. The tool is designed as a cutting device having a parting slide displaceable essentially transversely to the axis of the branch.

Abstract: An internal high pressure forming installation is provided, in which a forming tool with upper and lower dies form a forming chamber for pressure forming a closed hollow profile. The installation has at least one axial punch which can seal the hollow profile be sealed at one end and apply an internal high pressure to expand the hollow profile. The installation includes a rapid filling device which can pre-fill the hollow profile with pressurized fluid when the axial punch is drawn back from the hollow profile end. In order for the production of hollow profiles to be suitable for mass production in a simple manner, the filling attachment is transported on the axial punch which brings the filling attachment into a contact position on the forming tool in order to fill it and, after the filling, guides it into a position remote from the forming tool.

Abstract: The invention relates to a device for forming a peripherally closed hollow profiled element (1) by means of fluidic internal high pressure. The device contains an axial plug (4) for sealing off the hollow profiled element (1) on the end face, said axial plug possessing an axial passage duct (5) supplying pressure fluid. The axial plug (4) has a sealing body which possesses on its end face (19) a trough-like depression (20), the peripheral wall (21) of which can be spread open radially elastically, within the hollow profiled element (1), by means of pressure fluid, until said wall comes to bear sealingly against the inner wall (22) of the hollow profiled element (1).

Abstract: A tube bend has at least one bend zone and two outlet zones adjoining the latter on both sides. The tube bend has a different cross-sectional shape from the outlet zones with an identical flow cross section. The degree of expansion, as the ratio of the diameter of the component in the bending plane to the diameter of the blank in the bending plane, has a value between 1 and 1.1.

Abstract: In a method and a device for joining a plane component to a hollow section, the component and the hollow section are inserted in an internal high pressure forming tool so as to be positioned in relation to each other and are connected through the subsequent aid of a fluidic high internal pressure in the hollow section. In order to achieve a connection between the plane component and the hollow section in a simple and process-controlled manner, while the high internal pressure is applied, the walls of the hollow section and the component, which rest against and are supposed to be connected with each other, are pressurized by a die that is integrated in the forming tool. The wall of the hollow section is punched so that the created slug is attached in a positive bonding manner to one area of the hole edge and increase in terms of its width towards its free end.

Abstract: The invention relates to a method and a device for producing secondary form features on a circumferentially closed hollow profile. The device comprises an internal high pressure forming tool, into the impression of which a hollow profile blank can be inserted, a branch branching off radially from the impression, into which branch the hollow profile blank can be expanded by means of a fluidic internal high pressure, with the secondary form feature being formed. So that secondary form features configured in virtually any desired manner from the point of view of the form profile can be formed on the hollow profile in a simple manner and in a reliable manner in terms of the process, it is proposed that the device, furthermore, comprises a diaphragm and a pressure generator, by means of which pressure can be applied to the diaphragm via a pressure medium in such a way that the diaphragm, during the expansion, bears in a supporting manner against the forming secondary form feature against the expansion direction.

Abstract: In a method and a device for producing a circumferentially closed hollow profile, a hollow-profile blank is expanded by fluidic internal high pressure in an internal high-pressure forming tool, after which the hollow-profile blank assumes the final shape of the hollow profile. In order to make it possible in a simple manner to have a production of a hollow profile in which process reliability is ensured to a sufficient extent even in the case of high expansions of the hollow profile (higher than or equal to the breaking elongation of the material), during expansion, the hollow-profile blank is supported, on at least one partial circumferential region, by at least one diaphragm fastened to the inside, facing the blank, of the tool and capable of being acted upon by a controllable pressure acting from outside, the diaphragm shifting back elastically as expansion progresses, with the supporting pressure acting on the diaphragm being reduced at the same time.

Abstract: A process is for producing a circumferentially closed hollow profile, which is of frustoconical form in sections, from a sheet-bar blank. To produce hollow profiles of this type, the sheet bar is cut to size so that a blank with a rectangular section and a ring segment, the summit of which adjoins the center of one side of the rectangle, while its outer arc, which faces the rectangle, is of approximately the same length as the length of the side of the rectangle, is formed, sheet-bar material also being left on the blank outside the summit, between the ring segment and the side of the rectangle, this material joining the ring segment with the side of the rectangle integrally at all locations and also joining the corners of ring segment and rectangle which are closest together, so as to form a rounded edge contour. Then the side edges of the blank are bent into abutment with one another about the longitudinal center axis of the blank.

Abstract: In a method and a device for producing a circumferentially closed hollow profile, a hollow-profile blank is expanded by fluidic internal high pressure in an internal high-pressure forming tool, after which the hollow-profile blank assumes the final shape of the hollow profile. In order to make it possible in a simple manner to have a production of a hollow profile in which process reliability is ensured to a sufficient extent even in the case of high expansions of the hollow profile (higher than or equal to the breaking elongation of the material), during expansion, the hollow-profile blank is supported, on at least one partial circumferential region, by at least one diaphragm fastened to the inside, facing the blank, of the tool and capable of being acted upon by a controllable pressure acting from outside, the diaphragm shifting back elastically as expansion progresses, with the supporting pressure acting on the diaphragm being reduced at the same time.

Abstract: A process is for producing a circumferentially closed hollow profile, which is of frustoconical form in sections, from a sheet-bar blank. To produce hollow profiles of this type, the sheet bar is cut to size so that a blank with a rectangular section and a ring segment, the summit of which adjoins the center of one side of the rectangle, while its outer arc, which faces the rectangle, is of approximately the same length as the length of the side of the rectangle, is formed, sheet-bar material also being left on the blank outside the summit, between the ring segment and the side of the rectangle, this material joining the ring segment with the side of the rectangle integrally at all locations and also joining the corners of ring segment and rectangle which are closest together, so as to form a rounded edge contour. Then the side edges of the blank are bent into abutment with one another about the longitudinal center axis of the blank.