Abstract: Device for the semiautomatic or fully automatic electric longitudinal-seam mash resistance welding of can bodies from overlapping, cut-to-size sheet-metal blanks rolled into sidewalls (20), with a guide arranged in front of the welding site for determining the lap width of the sidewall edges (21, 22) including resilient guide elements (32-34), whereby the sidewall edges (21, 22), when traveling toward the welding site, can be pressed against the bases (29, 30) of the groove of a Z-rail (13), and with a calibrating rim (40) arranged in the zone of the welding site, with such a construction of the guide means that the lap width of the sidewall edges (21, 22) at the welding site is at most six times the thickness of the can wall, and with wire electrodes (11) that can be pulled off a reel and are guided over electrode rollers (7, 9), these electrodes being fashioned as flat-wire electrodes (11) having a width exceeding the lap width of the sidewall edges (21, 22) at the welding site.

Abstract: A numerically controlled groove-stamping machine which includes an indexing unit rotatable stepwise by means of a positioning drive about a rotational axis as a function of a stroke of a punch of the groove-stamping machine. The indexing unit is adapted to be driven, in a stepwise fashion, in two intersecting directions running at right angles to the rotational axis. A numerically controlled automatic multiple tool set is provided with the set being equipped with, for example, a stator groove and cut-off tool, a rotor groove tool, and vent hole tools. The tools of the multiple tool set, in accordance with the work steps to be executed, are adapted to be brought into engagement in an individually controllable manner.

Abstract: In loading a press, it is desirable to provide a loading device which can be driven independently of the main driving means of the press and which causes a minimum of surface damage to the blanks being loaded into the press. To achieve this, gripper elements are provided which are coupled to adjustable drive systems controlled by a numerical control unit. The gripper elements are capable of motion in at least two planes perpendicular to each other to remove devices from the stack and carry them along a preselected path into a tool chamber of the press.