Patent DE-102007062474-A1 (DE)
Title: Device for resistance-, pressure- and/or projection welding, comprises lower tool with lower welding electrode to receive and contact a first workpiece, and upper tool with upper welding electrode to receive and contact a second workpiece
Inventor: RUEPL MARTIN
IPC: B23K11/31
Filed: 2007-12-20
Abstract: The device (10) for resistance welding, pressure welding and/or projection welding, comprises a lower tool (12) with a lower welding electrode (14) for receiving and contacting a first workpiece, and an upper tool (16) with an upper welding electrode (18) for receiving and contacting a second workpiece, which is welded to the first workpiece. The upper and the lower tools are movable against each other, are pressable against each other with a defined clamping force, are mounted on an arc-like rigid and torsion-resistant frame (20) and are connected with one another over the frame. The device (10) for resistance welding, pressure welding and/or projection welding, comprises a lower tool (12) with a lower welding electrode (14) for receiving and contacting a first workpiece, and an upper tool (16) with an upper welding electrode (18) for receiving and contacting a second workpiece, which is welded to the first workpiece. The upper and the lower tools are movable against each other, are pressable against each other with a defined clamping force, are mounted on an arc-like rigid and torsion-resistant frame (20) and are connected with one another over the frame. The frame has a C-shaped contour. A lower shank of the frame, at which the lower tool is arranged, is supported by a column-like rack, which is a bottom support. The upper tool comprises an advancing device and a pressing device, over which the upper tool is mounted on an upper shank of the frame, movable in the direction of the lower tool. The advancing device and the pressing device comprise a hydraulic and/or pneumatic linear drive, and a hydraulically, pneumatically and/or mechanically operatable locking device. Switching elements, control elements and conducting elements are arranged in the area of the frame and/or the rack and/or are integrated within their cavities, and are mounted on the external side of the slender column-like rack. A central controller of the welding device is spatially separately arranged from the welding device and is connected with the welding device over line connections. The frame is manufactured from steel sheets that are welded with one another. Two lateral sheet metal shells, which are distanced from each other, defining the width of the frame are connected with one another over connecting plates. One connecting plate locking the upper shank of the frame is formed as a support surface for the upper tool and the other connecting plate locking the lower shank of the frame is formed as a reception surface for the lower tool. The sheet metal shells of the frame have outwardly pointing support surface and mounting surface for further handling- and/or feeding arrangements. The support surface, reception surface and mounting surface of the frame are accurately manufactured under the observance of defined measurement- and angle tolerances. The base surface of the welding device on the base is less than 0.25 m 2>.