A method of manufacturing a blank which uses direct electric heating includes: pressing electrodes on both sides of the blank and heating the blank by applying current to the blank; hot-forming the heated blank; trimming the formed blank; and loading the trimmed blank. An apparatus for manufacturing the blank includes a pair of first electrode units on both surfaces of a side of the blank to press the surfaces, a pair of second electrode units on both surfaces of the other side of the blank, a pressing unit pressing the first electrode units or the second electrode units on the blank, a cooler cooling portions around the first electrode units or the second electrode units, and a power supply control unit heating the blank up to a predetermined temperature.

The present invention provides a spot resistance welding electrode cap for welding two or more work-pieces together, including a substantially cylindrical body having an interior surface, an exterior surface, and a tapered interior cavity for frictionally fitting over an electrode shank. The exterior surface of the body includes a plurality of longitudinally extending depressions or flutes formed therein which provide an increased external surface area to the electrode cap, thus increasing the ability to transfer additional amounts of heat. The electrode cap further includes a plurality of fins disposed on the interior surface of the body within the interior cavity. The free ends of the fins are chamfered in order to ease the transition of coolant flowing throughout the shank proximate the electrode cap.

In order to further improve a method for joining a multilayer component (10) to another component (11) in a way that allows the multilayer component (10) to be mechanically and electrically joined to other elements, it is provided that an intermediate layer (14) of the multilayer component (10) be displaced in the region of the joining site (32), and that the two outer structural elements (12, 13) of the multilayer component be joined to one another by applying an electric voltage; and that the other component (11) be joined as a fastening element to the multilayer component (10) in the region of the joining site (32).

The invention relates to a coolant supply device of a machining device to be supplied with a fluid coolant, particularly with water, for example a welding arrangement (2) or a welding robot etc., the region or tool to be cooled, for example a welding cap, being incorporated into an open or closed coolant circuit which has an inflow (4) and an outflow (5), and said device comprising a conveyor device that operates in the coolant circuit and conveys the coolant within said coolant circuit, and a control device (8) for deactivating said conveyor device and/or closing the inflow (4) and/or outflow (5) and evacuating said inflow (4) and/or outflow (5) such that, in the region of the tool being cooled, an at least negligible level of negative pressure prevails in the inflow line (9) and/or in the outflow line (12).

In an electrode chip attachment device, a guide member which is formed such that the guide member can be divided into a first half member and a second half member with a division surface that is passed though the communication hole and that is parallel to the axial direction and a coupling shaft serving as a separate mechanism which separates the first half member and the second half member from each other when the chip holder is pushed into the first tapered portion and the second tapered portion from the opposite side of the electrode chip and which passes the chip holder to the side of the electrode chip.

A method of controlling a welding cap cooling water controller having a cooling water pipe which includes a test section with a welding cap between an inlet valve in the cooling water inlet and a return valve in the cooling water return, in a first step the pressure of the cooling water in the test section is increased to an overpressure which is above a supply pressure that prevails in the test section during the welding process with the inlet valve open and the return valve open, and subsequently a pressure drop measurement is performed at overpressure. Furthermore, a welding cap cooling water controller is provided which is adapted to carry out such a method.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

An apparatus for cooling-water extraction for a robot installation plate is characterized by an adjustable extraction volume. The extraction volume is achieved by a sufficiently large extraction cylinder which has a maximum extraction volume, wherein the extraction volume is adjusted by a mechanical stroke limit of a piston located in the extraction cylinder. In at least one embodiment, the mechanical stroke limit is realized by an adjustment screw that is on or in the extraction cylinder. The adjustment screw forms a stop that provides an end position limit or stroke limit of the piston.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.