Abstract: The present invention relates to a method and an apparatus for forming a hairpin-shaped winding element from a conductor.

Abstract: The invention relates to a method and a device for deforming a U-shaped electric conductor into a hairpin which can be used to produce a bar winding of an electric machine. Prior to the deforming process, the electric conductor has two parallel limbs which are integrally connected together by means of a connection limb, and the three limbs are arranged on an imaginary plane. According to the invention, the two parallel limbs are first clamped in a respective clamping device, the first limb together with the first clamping device is then held in place, the second limb is then moved away from the first limb on a circular path, thereby stretching the connection limb, and a deformation section of the electric conductor is simultaneously or subsequently moved on a guide surface of a twisting guide element, wherein the guide surface protrudes radially beyond the circular path.

Abstract: The invention relates to an impregnation device (1) for trickle impregnation of a stator (2) or armature of an electric machine with a synthetic resin (5) curing under temperature increase, comprising a holding device (32) which can be tilted vertically relative to the horizontal (16) and to which a drive motor (12) is attached as a rotary drive for the stator (2) or the armature, a drive shaft (58) operatively connected to the drive motor (12), a clamping device (34) which is non-rotatably connected to the drive shaft (58) and capable of detachably connecting the stator (2) or the armature to the drive shaft (58), a trickle device (24) capable of applying a synthetic resin (5) onto at least one axial end of the windings (4) of the stator (2) or the armature, and a heating device capable of heating the windings (4) of the stator (2) or the armature to a trickle temperature and to a comparatively higher curing temperature.

Abstract: The present invention relates to a method and an apparatus for forming a hairpin-shaped winding element from a conductor.

Abstract: The invention relates to a method for burr-free cutting-off of a wire, an apparatus for burr-free cutting-off of a wire, a wire piece and a hairpin.

Abstract: The invention relates to a method and a device (1) for deforming a U-shaped electric conductor (6) into a hairpin (19) which can be used to produce a bar winding of an electric machine. Prior to the deforming process, the electric conductor (6) has two parallel limbs (7, 8) which are integrally connected together by means of a connection limb (9), and the three limbs (7, 8, 9) are arranged on an imaginary plane (10). The aim of the invention is to carry out the deformation of the electric conductor (6) into a hairpin (19) in an inexpensive manner.

Abstract: The invention relates to a method and a heating device (1c) for inductively heating a stator (2) or armature (3) of an electric machine, in particular before and during trickle impregnation thereof. In addition, the invention relates to an impregnating device (50) in which this heating device (1c) is integrated. According to the invention, it is provided that the heating takes place inductively by means of electromagnetic fields of different frequencies. For this purpose, it is provided in the case of the heating device (1c) that it has at least one electromagnetic inductor (18, 21, 24) which is disposed coaxially or axially parallel with respect to the longitudinal axis (7) of the stator (2) or armature (3) and which inductively heats said stator or armature, and that the at least one inductor (18, 21, 24) is designed to generate at least two electromagnetic fields of different frequencies.