Patent EP-2305413-A1 (EP)
Inventor: BIHLER MATHIAS
IPC: B23K11/36
Filed: 2010-09-24
Abstract: The welding device for punching- and/or bending machine for loading carrier parts with contact metal through welding of contact metal blanks that are separated from a band material such as wire, comprises a base frame, an electrode pair with a first electrode movable between a reception position and a welding position relative to a second electrode, where the first and second electrodes (16, 18) are arranged to first and second frame elements that are pivotable relative to each other, and a contact metal supply with a feed device. The welding device for punching- and/or bending machine for loading carrier parts with contact metal through welding of contact metal blanks that are separated from a band material such as wire, comprises a base frame, an electrode pair with a first electrode movable between a reception position and a welding position relative to a second electrode, where the first and second electrodes (16, 18) are arranged to first and second frame elements that are pivotable relative to each other, and a contact metal supply with a feed device for the supply of contact metal blanks to the electrode pair. The electrodes are detachably connected by an electrode holder with an electrode reception in such a way that the electrode holder with the electrode is removable in interrupted operation of the welding arrangement from the welding device mounted on the punching- and/or bending machine. A coolant inflow and a coolant outflow of a coolant circuit are provided in the frame element for cooling the electrode. The electrode and/or the electrode holder are formed in such a way that the coolant circuit is automatically connected between the electrode holder and the frame element through the production of mechanical connection. The coolant circuit is a common emptying device in order to remove the coolant present in the circuit. The emptying device comprises a pneumatic line that is connected through a valve with the coolant inflow or the coolant outflow, where compressed air from a compressed air source is pumped into the coolant circuit. The emptying device comprises a flow valve associated to the coolant inflow, where the flow valve is connected during emptying the coolant circuit. The electrode holder is connected with the electrode reception of the frame element in positive-fit manner. The electrode holder and the electrode reception are formed on the frame element in such a way that a clamping connection is produced between the electrode holder and the frame element. The electrode holder comprises two guiding strips (20a, 22a) connected to each other in its interval. The guiding strips receive a frame section of the electrode reception in incorporated condition of the electrode. The guiding strips are connected to each other through a bolt, which is received in incorporated condition of the electrode in a corresponding opening in the frame section. The bolt is formed in such a way that it is positionable by a positioning screw so that the interval between the guiding strips is adjustable in order to detach the clamping connection between the electrode and the frame section. Independent claims are included for: (1) an electrode head for a welding device; (2) a punching- and/or bending machine for deformation of workpieces; and (3) a method for exchanging an electrode head.