A welding or cutting tool for welding or cutting electrically conductive workpieces includes a nozzle arranged on a tool tip for discharging a welding or cutting beam and a nozzle cap which at least partly surrounds the nozzle, is open towards the tool tip, and has an electrode that forms a capacita
A welding or cutting tool for welding or cutting electrically conductive workpieces includes a nozzle arranged on a tool tip for discharging a welding or cutting beam and a nozzle cap which at least partly surrounds the nozzle, is open towards the tool tip, and has an electrode that forms a capacitance with the respective workpiece and an insulating element that electrically insulates the electrode from the other components of the tool. The electrode consists of a first electrically conductive ceramic material and is formed integrally with the insulating element, which consists of a second electrically insulating ceramic material.
대표청구항▼
1. A welding or cutting tool for welding or cutting electrically conductive work pieces, having a nozzle disposed at a tool tip, for exit of a welding or cutting jet, and having a nozzle cap that encloses the nozzle, at least in part, and is open toward the tool tip, wherein the nozzle cap has an el
1. A welding or cutting tool for welding or cutting electrically conductive work pieces, having a nozzle disposed at a tool tip, for exit of a welding or cutting jet, and having a nozzle cap that encloses the nozzle, at least in part, and is open toward the tool tip, wherein the nozzle cap has an electrode that forms a capacitance with the respective work piece, and wherein the nozzle cap has an insulating element, wherein the electrode comprises an electrically conductive first ceramic material, and is configured in one piece with the insulating element, wherein the insulating element comprises an electrically insulating second ceramic material. 2. The tool according to claim 1, wherein the first ceramic material is titanium nitride or a ceramic having titanium nitride. 3. The tool according to claim 1, wherein the second ceramic material is aluminum oxide. 4. The tool according to claim 1, further comprising an electronic evaluation unit having an electrical connector, wherein the nozzle cap has a contact element that connects the electrode with the electrical connector in electrically conductive manner. 5. The tool according to claim 4, wherein the contact element comprises the first ceramic material. 6. The tool according to claim 4, wherein the contact element is configured as a film strip having a thickness of maximally 0.2 mm. 7. The tool according to claim 4, wherein the contact element is embedded into the insulating element. 8. The tool according to claim 4, wherein the contact element extends over a step on the insulating element that runs transverse to a longitudinal tool axis. 9. The tool according to claim 8, wherein the contact element projects from the insulating element at the step, and is bent where the contact element projects at the step to produce planar contact with the step. 10. The tool according to claim 4, wherein the contact element is disposed on an inner surface of the insulating element that faces the nozzle. 11. The tool according to claim 1, wherein the electrode has a spherical outer surface, facing away from the nozzle, wherein the spherical outer surface has a central exit opening. 12. A method for the production of a nozzle cap for the welding or cutting tool according to claim 1, wherein in a two-component ceramic injection-molding method, first material for forming the first ceramic material, which forms the electrode, is introduced into an injection mold in a first method step, and second material for forming the second ceramic material, which forms the insulating element, is introduced into the injection mold in a second method step, and wherein the semi-finished product obtained in this manner is then removed from the injection mold and conducted to a firing process. 13. A method for the production of a nozzle cap for the welding or cutting tool according to claim 1, wherein first material for forming the first ceramic material that forms the electrode is introduced into a first injection mold, and second material for forming the second ceramic material, which forms the insulating element, is introduced into a second injection mold, and wherein the semi-finished products obtained in this manner are removed from the injection molds and joined together in a firing process. 14. The method according to claim 12, wherein the first material for forming the first ceramic material is used to form a contact element and wherein the first material for forming the first ceramic material that forms the contact element is introduced into the respective injection mold before removal of the semi-finished product or of the semi-finished insulating element from the injection mold, in a further method step.
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