Installations for electron beam welding.
To create the electron beam requires a fairly high vacuum, such that the mean free path of electrons was greater than the distance from the cathode, where they are formed, welded to the product.
Plants for EBW consist of the following main components: a vacuum chamber with exhaust system, sva-rochnoy electron gun that creates electron beam welding of the table and moving parts, the source of the power supply of the electron gun control unit. Depending on the size of the workpiece in the cathode chamber installations use the appropriate size to allow the product to move for a given configuration of welds.
Often placed in the chamber welding manipulators for a few products to allow them to change, without opening the chamber, it greatly increases the productivity of plants. Since the transverse dimensions of the welding heat source - the electron beam in these plants are small, the accuracy of the manipulators are increased requirements. Thus, the deviation of the welded joints of the required provisions may be from a few micrometers to 0.2 mm, welding speed deviation should not exceed ± 1% of par.
Electron beam - the source of heat, warming and melted metal, creating an electron gun, feeding from the power rectifier cathode heating power, and control power parameters of the beam - from the modulator control unit (adjustable current in the beam), focusing block (adjustable cross-section of the beam) and beam deflection unit (as determined by the location of the beam on the beam and moving parts of it).
Speed of the beam Details of welding - welding speed is determined by the speed of movement or rotation of the part itself or the rate of deflection. Mechanisms of the welding robot powered by a power supply system of moving parts. The power supply system of vacuum pumps and a system of measuring the degree of vacuum in various parts of the plant and in a separate block of the general scheme of the power supply.
Work of all the individual blocks of the overall consistent with the electrical power switching and control.
See also:
Electron Beam Welding Technology
Electron Beam Welding Article
Installations for Electron Beam Welding
Electron Beam Welding Gun
Work Chambers for EBW
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