Cascading pressure system for electron beam welding and electron beam welding method

摘要

The pressure tier system (1) comprises two cascading tiers, means, which seals a joining zone of workpiece to be connected against the environment so that a vacuum is produced on the joining zone, a base plate, which is connected to ends of first and the second pressure tubes and coupled to a beam producer of device for the electron beam welding, a pressure tier container connected to the second end of the first and the second pressure tube, a first nozzle coaxially received in the pressure tier container, and a nozzle cone coaxially received in the pressure tier container. The pressure tier system (1) comprises two cascading tiers, means, which seals a joining zone of workpiece to be connected against the environment so that a vacuum is produced on the joining zone, a base plate, which is connected to ends of first and the second pressure tubes and coupled to a beam producer of device for the electron beam welding, a pressure tier container connected to the second end of the first and the second pressure tube, a first nozzle coaxially received in the pressure tier container, a nozzle cone coaxially received in the pressure tier container, a cover cone surrounding the nozzle cone coaxially received in the pressure tier container, a second nozzle arranged between the tip of the nozzles cone and the cover cone, and a sealing lip with a brush sealing. The means comprises a local vacuum chamber (12, 13, 14), whose volume is less than 5 liter. The local vacuum chamber comprises two individual chambers and is formed in such a way that it is evacuatable over a venturi principle. The pumps (16) and/or compressor for producing the vacuum are connected on the joining zone of the workpiece to be connected on the means. The pressure tiers are formed in the form of the first pressure tube and second pressure tube arranged coaxially within the first pressure tube. The pressure tier system has a ratio of length and diameter of greater than 4:1 to a diameter of less than 80 millimeter. The electron beam welding is carried on a pressure range of greater than 10 -4. The sealing means (17) is pressed over spring elements on the component surface. An independent claim is included for an electron beam welding.