Inventio Ag

Technische Universitaet Dresden

Other

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Kerb-konus-vertriebs-gmbh

Reinhard Mauermann

Wolfgang Voelkner

Michael Matheisl

Thomas Novacek

Georg Donhauser

Andreas Trojer

Markus Israel

Thomas Illedits

David Krampl

Richard Schütz

Hartmut Carstensen

Gunter Quaisser

Fritz Liebrecht

Fred Jesche

Stephan Dietrich

Michael Zimmermann

Lutz Lachmann

Guenter Berger

Gerald Effenberg

A clinching tool () for producing a load-bearing, supporting or stable connection of a first metal workpiece () with a second metal workpiece (). The clinching tool () comprises a die tool () and a counter-tool () which together form and join, by local plastic reshaping or deformation of the metal workpieces (), a clinch connection () which connects or permanently joins the first metal workpiece () and the second metal workpiece (). The die tool () comprises a die having a flank () arranged concentrically with respect to the rotational axis (). The flank () has a front end surface () perpendicular to the rotational axis (). The flank () is conically shaped at least in the lower transition region () to the front end surface () and has a flank angle (W, W, W) smaller than or equal to 10 degrees, preferably smaller than or equal to 5 degrees.

Method and tool for clinching thick plates and use of the tool or of the clinching apparatus or of the clinching appliance

A method of producing a load-bearing steel construction connection, wherein a clinch connection () connecting a first metal workpiece () with a second metal workpiece () is formed by local deformation by means of a die tool () and a counter-tool (). In that case initially the first metal workpiece () and the second metal workpiece () are placed one on the other on a processing surface of the counter-tool and aligned. The die of the die tool is then advanced and sunk into the two metal workpieces () placed one on the other until the clinch connection () has been formed by plastic deformation. The first metal workpiece () has a first workpiece thickness (t) and the second metal workpiece () has a second workpiece thickness (t), which together give a total workpiece thickness (tt) which is thicker than 8 millimeters. The die is designed to be rotationally symmetrical with respect to its rotational axis () and has a conically shaped transition region () narrowing at an angle (W, W, W) in the direction of sinking-in of the die.

Method for clinching thick metal workpieces, use of a clinching tool, and steel structural element produced accordingly

Two components are held in at least partially overlapping relation to each other between a hold-down device and an essentially flat lower tool and then are joined together by pressing an auxiliary joining element into one of the components a sufficient distance to plastically deform the components in a manner that positively joins the two components together. A tool with an optional wobbling movement and/or an optional variable force is used to press the auxiliary joining element into the first component. The magnitude of force applied by the hold-down device affects the direction of plastic flow of the material of the components in relation to the flat lower tool.

Method, device and auxiliary joining element for joining at least two parts

The invention relates to a method for mechanically joining stacked, plate-shaped objects, especially metal sheets by means of punch riveting with a semitubular rivet while using tools placed above and below the objects, whereby the semitubular rivet linearly penetrates into the objects. The inventive method is characterized in that, during the axial feed motion of the semitubular rivet, the upper tool and/or a portion of the lower tool is/are subjected to a wobbling additional movement in a radial and/or tangential direction. The invention also relates to an apparatus and to the semitubular rivet which are used for carrying out the method.

Method, device and rivet for effecting a mechanical joining

The invention relates to a method for connecting overlapping flat parts in a mechanical joining process, for example for connecting panels, using a mould stamp ( ) and a matrix which is provided with a recess, the parts to be connected being placed between the mould stamp and the matrix. The invention is characterized in that the active axial advancing movement of the mould stamp ( ) is impressed with a tumbling motion throughout the entire joining process or during a part of the joining process and will a variable stamping force (F) which is dependent on said tumbling motion, in or to produce a flow of material that is oriented towards the undercut ( ). The invention also relates to a device for carrying out the inventive method.

Method and device for connecting overlapping flat parts

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

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Dresden, Germany

Reinhard Mauermann