Kerb-konus-vertriebs-gmbh

Other

Profil Verbindungstechnik Gmbh & Co Kg

Georg Donhauser

Reinhard Mauermann

Hartmut Carstensen

Wolfgang Voelkner

Fritz Liebrecht

Gunter Quaisser

Michael Zimmermann

A component assembly is described which consists of a component and an element attached to the component and formed as an alignment element. The element has a head part, a component contact surface provided at an end face of the head part and a collar arranged inside the component contact surface and projecting away from it. The collar has a cross-sectional shape which is non-circular. The collar is inserted with clearance into an aperture of the component formed complimentary to the cross-sectional shape of the collar and has outer surfaces which converge in the direction of the said end face of the head part and with respect to the central longitudinal axis of the element and form an acute angle with the latter. The marginal region of the aperture of the component adjacent to the component contact surface extends into recesses formed between the collar and the end face of the head part but does not reach the base of the recesses, with a free space arising which ensures a lateral alignment movement of the element relative to the component. An axial separation of the element from the component is prevented as a result of material overlap of the component material with the collar within the recesses. Elements and methods for manufacture of the component assembly are also claimed.

Component assembly comprising a component and an element having a head part and a collar arranged at one side of the head part as well as manufacturing methods

A punching, stamping rivet has a frustum-shaped rivet head and a shank following thereafter. In order to create a rivet connection between two adjoining structural parts, the shank is punched through the structural parts forming a punched hole, and a groove is coined thereafter around the shank end in that structural part. In order to be able to process structural parts having varied thicknesses, several shank grooves are arranged on the shank, into which shank grooves material penetrates under plastic deformation during the coining of the groove.

Punching, stamping rivet

The invention relates to a method and device for thermally supporting mechanical joints by means of punched rivets with a semi-hollow rivet or a solid rivet or by pounding. The method is characterized in that a local and time limited heating of the joint parts ( ) occurs by means of electric resistance heating in the future forming zone, whereby the heating is carried out by means of a hold-down device ( ) and a matrix ( ) or by elements ( ) arranged next to or elements ( ) arranged in front of said hold-down device and matrix. The heating is initiated at the start of or immediately before the joining process and is completed before the forming begins.

Method and device for thermally supporting mechanical joints

The invention relates to a tool for applying punched rivets, either full rivets or semi-tubular rivets. The tool having a blank holder for pretensioning assembly pieces, especially metal sheets; a rivet punch movable in an axial direction within a cylinder of the blank holder; and a die that is arranged opposite the blank holder and punch and provided with an annular prominence on an end face thereof and facing the rivet punch. A radial outside section of said end face concentrically surrounds said annular prominence, the outside section of said end face being displaceable relative to the annular prominence as a function of one of the penetration depth of the rivet into the assembly pieces and the force that the rivet punch exerts on the rivet.

Tool for applying punched rivets

A punching, stamping rivet has a frustrum-shaped rivet head and a shank with a shank groove following thereafter. In order to create a riveted joint between two sheets, the sheets are punched through by the shank. A groove is subsequently stamped around the shank end in the lower sheet, thus pressing material of the lower sheet into the groove. In order to increase the strength of the riveted joint, the shank groove is concavely constructed, whereby the section of the groove, which section is adjacent the rivet head, extends at an angle with respect to the shank axis, which angle is less than an angle at which the section adjacent the shank end extends with respect to the shank axis.

Shank groove configuration for a rivet

A rivet tool has a rivet pin which can be moved in a bore of a stamp die. The tool consists of a hydraulic cylinder having two pistons in which the first piston carries the rivet pin and the second piston carries the stamp die. The chamber between the pistons is connected with a variable volume pressure chamber. The cylinder chamber, which is facing the first piston, is connected with a pressure cylinder. After a rivet has been conveyed to beneath the rivet pin, a pressure cylinder is activated and a throttle interconnected between the chamber between the pistons and the pressure chamber. The stamping process is carried out hereby and the first piston is then pressed in direction of the second piston, whereby the first piston then lies on top of the second piston to effect the stamping process.

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Amberg, Germany

Georg Donhauser