Device for electrical resistance rolled-seam welding and, in particular, an electrode roller and welding-current supply provided for this purpose

摘要

The described device is constructed such that narrow tin bodies having an internal diameter of, for example, 52 mm can be produced from rounded borders by welding the border edges. The welding power is supplied to the electrode roller (30) via copper caps (48'), a clamping piece (14), contact pieces (64, 64') arranged on both sides of the same, contact jaws (60, 60'), silver-contact segments (61, 61') and outer surfaces (35a') of broad hubs which are provided on the electrode roller (30). The contact jaws (60, 60') engage around the hubs of the electrode roller (30) on both sides underneath and on top, as a result of which a large current-transfer surface and a low specific contact pressure are achieved. The hub outer surfaces (35a'), which form the actual contact surfaces of the electrode roller (30), are continuously lubricated via felt lubricating segments (78). The contact pressure of the contact jaws (60, 60') can be set in a simple manner by means of a screw (72). The complete device and, in particular, the electrode roller (30) are intensively internally cooled by means of a special cooling device. IMAGE