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AssigneeTechnische Universitaet Dresden
InventorsWolfgang Voelkner, Gerald Effenberg, Reinhard Mauermann
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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 (1a) 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 (1a) 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 (6). The invention also relates to a device for carrying out the inventive method.
Method for connecting overlapping flat parts in a mechanical joining process by using a forming punch and a die provided with a recess between which the parts to be joined are positioned, wherein active axial feeding movement of the forming punch is superimposed with an orbital motion during the whole joining process or during a portion of the joining process and a varying punch force dependent on the orbital motion is applied so that a material flow directed to an undercut is produced.
Device for connecting overlapping flat parts in a mechanical joining process, comprising a displaceable forming punch, a die provided with a recess between which the parts to be joined can be positioned, a mechanically powered mechanism which gives the forming punch an orbital motion, another powered mechanism which feeds the forming punch with a varying punch force against the recess of the die, and means for controlling the value of the punch force depending on the orbital position.
Dependencies are inferred from the claim text.