Method for assembling, in at least one direction, named direction of traction, ▪ a first part having an edge, named crimping edge, extending to an end of said first part in said direction of traction, ▪ and a second part having: - a lip, named crimping lip, at least partly made up of an electrically conducting material, - a stop, named crimping stop, extending opposite and remote from an inner side of the crimping lip, providing a groove, named crimping groove: • open in said direction of traction, • adapted to receive said crimping edge of said first part, method in which: - the crimping edge of the first part is introduced into the crimping groove of the second part in said direction of traction, - then magnetic crimping is carried out by applying to the crimping lip a magnetic field variation that is adapted to fold the crimping lip without winding and to plastically deform the crimping lip towards the crimping stop, so as to close the crimping groove onto the crimping edge of the first part, characterised in that: - the crimping stop has at least one portion that is inclined relative to the direction of traction, - the crimping lip is longer than the depth of the crimping groove, - during magnetic crimping a free end of the crimping lip is folded against a face, named inner face, of the second part, said inner face being distinct from the crimping stop, so that the crimping edge has a portion in abutment against said inner face, on the one hand, and in abutment against the free end of the crimping lip, on the other hand. ▪ a first part having an edge, named crimping edge, extending to an end of said first part in said direction of traction, ▪ and a second part having: - a lip, named crimping lip, at least partly made up of an electrically conducting material, - a stop, named crimping stop, extending opposite and remote from an inner side of the crimping lip, providing a groove, named crimping groove: • open in said direction of traction, • adapted to receive said crimping edge of said first part, method in which: - the crimping edge of the first part is introduced into the crimping groove of the second part in said direction of traction, - then magnetic crimping is carried out by applying to the crimping lip a magnetic field variation that is adapted to fold the crimping lip without winding and to plastically deform the crimping lip towards the crimping stop, so as to close the crimping groove onto the crimping edge of the first part, characterised in that: - the crimping stop has at least one portion that is inclined relative to the direction of traction, - the crimping lip is longer than the depth of the crimping groove, - during magnetic crimping a free end of the crimping lip is folded against a face, named inner face, of the second part, said inner face being distinct from the crimping stop, so that the crimping edge has a portion in abutment against said inner face, on the one hand, and in abutment against the free end of the crimping lip, on the other hand. - a lip, named crimping lip, at least partly made up of an electrically conducting material, - a stop, named crimping stop, extending opposite and remote from an inner side of the crimping lip, providing a groove, named crimping groove: • open in said direction of traction, • adapted to receive said crimping edge of said first part, • open in said direction of traction, • adapted to receive said crimping edge of said first part, - the crimping edge of the first part is introduced into the crimping groove of the second part in said direction of traction, - then magnetic crimping is carried out by applying to the crimping lip a magnetic field variation that is adapted to fold the crimping lip without winding and to plastically deform the crimping lip towards the crimping stop, so as to close the crimping groove onto the crimping edge of the first part, - the crimping stop has at least one portion that is inclined relative to the direction of traction, - the crimping lip is longer than the depth of the crimping groove, - during magnetic crimping a free end of the crimping lip is folded against a face, named inner face, of the second part, said inner face being distinct from the crimping stop, so that the crimping edge has a portion in abutment against said inner face, on the one hand, and in abutment against the free end of the crimping lip, on the other hand.