Abstract: The invention relates to a method for removing Cr(VI) ions from an aqueous electrolyte solution, particularly an electrolyte solution for electrochemical metal machining, which comprises the reduction of Cr(VI) to Cr(III) with Fe(II) ions. The Fe(II) ions are added to the electrolyte solution in the form of an aqueous salt solution which has been brought into contact with an ion exchange resin loaded with Fe(II) ions. The invention further relates to a device (1) for electrochemical machining of a workpiece (2) by means of an aqueous electrolyte solution (6), which has an ion exchanger (11) which has been loaded with an ion exchange resin charged with Fe(II) ions.

Abstract: The invention relates to a method for removing Cr(VI) ions from an aqueous electrolyte solution, particularly an electrolyte solution for electrochemical metal machining, which comprises the reduction of Cr(VI) to Cr(III) with Fe(II) ions. The Fe(II) ions are added to the electrolyte solution in the form of an aqueous salt solution which has been brought into contact with an ion exchange resin loaded with Fe(II) ions. The invention further relates to a device (1) for electrochemical machining of a workpiece (2) by means of an aqueous electrolyte solution (6), which has an ion exchanger (11) which has been loaded with an ion exchange resin charged with Fe(II) ions.

Abstract: The invention relates to a fastening element (10) for connecting to a component (12), wherein the fastening element (10) comprises a flange with drive structures, wherein a connection region is formed on the flange, through the fusing of which the fastening element (10) can be fastened to the component (12) by friction welding, wherein the fastening element (10) comprise a shaft which is arranged on the side of the flange opposite the connection region. The fastening element (10) further comprises a guide region between shaft and connection region in the axial direction, which comprises a guide surface, which comprises at least one segment of an outer surface, which is associated with a cone which broadens in the direction of the connection region. The invention is characterized in that the guide region has a flat surface on the end thereof facing towards the shaft, wherein the extension of the flat surface in a radial direction is greater than the diameter of the shaft.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: The invention relates to a conveyor for elongate components (12) designed with a head and a shank. The conveyor comprises a feed arrangement (7). The feed arrangement (7) comprises a transfer arrangement (8) with a transfer region (15) in which a component (12) can be positioned. In the transfer region (15), a feed duct (11) having a head guiding duct (13) and a shank guiding duct (14) passes into a conveying duct (16). The transfer arrangement (8) comprises at least one catch unit (17). The catch unit (17) comprises at least one catch element (18). The catch element (18) is arranged opposite the head guiding duct (13) and penetrates at least partially therein. It can be deflected from the head guiding duct (13) against a spring force.

Abstract: The invention relates to a chuck (2) for retaining fixing elements (1) that are provided with a respective radial contact surface and a follower profile (17) for a friction welded connection on a component and for transmitting the rotational and contact forces that act on a fixing element. An annular receiving element (9) is provided in the chuck (2) for transmitting the rotational force, said receiving element tightly surrounding the fixing element comprising an axial polygonal profile that has been introduced. The chuck comprises a retractable contact part (18, 27) in the annular receiving element (9), which is guided in said element and which can be retracted in said element to permit the entry of a fixing element through a lateral opening (12) in the receiving element, the part being retracted behind said opening.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: The invention relates to a method for friction welding components (35) during which both components are rotated relative to one another during a heating phase under mutual axial pressing force (F) generated by a pressing force actuator (8a) at the location to be welded when component (3) is at rest and when driven component (5) is rotating. In addition, after the components (3, 5) have been subjected to a sufficient friction heating, the rotating is slowed down and the components, which are stationary with regard to one another, are pressed together with a pressing force that is significantly greater than that during the heating phase. The rotated component (5) is driven by an electric motor (7), which is provided with a controller (19) and whose rotational speed (n), torque (RF), pressing force (F) and advancing depth (S) are measured by the controller.

Abstract: The invention relates to a fastening element with a face, which has a concentric annular bead (3), for being friction welded to a flat component (12, 26) by rotational force acting upon the fastening element and a pressing force directed toward the component (12, 26). The annular bead (3) has, in the area of its greatest height (6), a concentric line of contact with the component (12, 26) and is a part of a flange (4), which comprises both the annular bead (3) as well as, outside of the annular bead (3), a concentric groove (7) with an outer wall (25) for repelling rubbed-off parts arising during friction welding, and has a central recess (8) for accommodating the rubbed-off parts, whereby the flange (4), together with its side facing away from the annular bead (3), forms an opposite surface (5) for the pressing force directed toward the component (12, 26) and, together with its outer surface, forms a driver for the rotational force.

Abstract: A feed device for fastening elements with low length-to-diameter ratio has a hollow clamp into which individual fastening elements are inserted through a feed channel. The clamp has an internal pocket for pre-positioning a fastening element. A piston moves through the feed channel to engage the fastening element and to open the clamp to release the fastening element for further movement by the piston.

Abstract: A method of manufacturing, using a riveting system, is operable to join two or more workpieces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: A fastening element (1), in particular for blind riveting, has a setting head (4), a deformation segment (2) and a shank end (3). The deformation segment (2) is arranged between the setting head (4) and the shank end (3). The fastening element (1) is hollow, optionally having a mandrel (7) inside the fastening element (1). The mandrel includes a head (23) and a foot (24) at least tension-resistantly connected to the shank end (3). The shank end (3) includes a punching edge (6) extending substantially along the outermost periphery of the shank end (3). Also identified are a process for setting the fastening element (1), a riveted connection to the fastening element (1), a device for setting the fastening element (1), an employment of the riveted connection obtained, and a die suitable for setting the fastening element (1).

Abstract: Computer software for controlling a riveting system is operable to join two or more workpieces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.

Abstract: The invention relates to a conveyor for elongate components (12) designed with a head and a shank. The conveyor comprises a feed arrangement (7). The feed arrangement (7) comprises a transfer arrangement (8) with a transfer region (15) in which a component (12) can be positioned. In the transfer region (15), a feed duct (11) having a head guiding duct (13) and a shank guiding duct (14) passes into a conveying duct (16). The transfer arrangement (8) comprises at least one catch unit (17). The catch unit (17) comprises at least one catch element (18). The catch element (18) is arranged opposite the head guiding duct (13) and penetrates at least partially therein. It can be deflected from the head guiding duct (13) against a spring force.

Abstract: A fastening element (1), in particular for blind riveting, has a setting head (4), a deformation segment (2) and a shank end (3). The deformation segment (2) is arranged between the setting head (4) and the shank end (3). The fastening element (1) is hollow, optionally having a mandrel (7) inside the fastening element (1). The mandrel includes a head (23) and a foot (24) at least tension-resistantly connected to the shank end (3). The shank end (3) includes a punching edge (6) extending substantially along the outermost periphery of the shank end (3). Also identified are a process for setting the fastening element (1), a riveted connection to the fastening element (1), a device for setting the fastening element (1), an employment of the riveted connection obtained, and a die suitable for setting the fastening element (1).