Terminal cap parts for magnetron and its producing method

Abstract

In the end cap member in which the ring-shaped solder is previously fixed in the end cap, the manufacturing man-hours can be reduced, and the occurrence of defects due to poor handling performance of the solder and soldering defects due to adhesive materials can be suppressed. As the end cap member 11, there is an end cap main body 12 composed of Mo and a ring-shaped brazing material 13 composed of a Mo-Ru or Mo-Ru-Ni solder sintered body, and the laser welding part 14 is used or the same as the ring-shaped solder. The paste-like brazing filler metal of the material fixes the ring-shaped brazing filler metal 13 on the predetermined position of the end cap main body 12 .

Description

technical field [0001] The present invention relates to an end cap part of a magnetron used in a high-frequency electronic food heater, etc., and a manufacturing method thereof. Background technique [0002] In the past, as a cathode part of a magnetron used in a high-frequency electronic food heater, etc., as shown in FIG. , the upper end and the lower end of the coiled filament 1 are respectively composed of Mo joined by Mo-Ru solder or Mo-Ru-Ni solder 2; the central lead 5 is connected and fixed to the upper end cap 3; the side lead 6 is fixedly connected to Lower end cap4. [0003] The brazing of the coiled filament 1 and the end caps 3, 4 in the above-mentioned cathode part assembly process is carried out like this: first see Figure 7 Insert an annular solder 7 composed of Mo-Ru or Mo-Ru-Ni at a certain position in the end caps 3 and 4, arrange the coiled filament 1 on the annular solder 7, and then move it into the brazing furnace For heat treatment. [0004] Howev...

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Problems solved by technology

[0004] However, as mentioned above, only inserting the annular solder 7 into the end caps 3, 4 has such a problem: since the inner diameter of the end caps 3, 4 is not much different from the outer diameter of the annular solder 7, once it is inserted Eccentricity, etc., will lead to poor insertion of the annular solder 7, or even if it is inserted, the annular solder 7 will tilt and float, etc., resulting in uneven melting of the annular solder 7 during brazing, resulting in poor brazing and assembly dimensions. Wait

[0006] However, in the above-mentioned existing brazing filler metal disposition and fixing method, the problems existing in the method of bonding the former brazing filler metal powder body on the surface of the end cap with an organic adhesive or the like are: first, because the brazing filler metal is pressed Powder, extremely poor operability, for example, when the brazing filler metal is inserted into the end cap by vacuum adsorption, poor insertion and damage are prone to occur; also, the problem is that the brazing filler metal like this is bonded with an organic adhesive, etc. The binder component may have a bad influence on the brazing material; the problem lies in the method of heating and drying the latter slurry solder, because it is difficult to ensure the required amount of solder, and at the same time, it is necessary to heat and sinter the solder and braze. Do two high-temperature treatments, so the cost is increased

However, since the high-temperature treatment is also performed twice in this case, the cost is increased, and the problem remains unsolved.

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