Tooling Fixture and Alignment Method for Non-Interception Grid-Controlled Electron Gun Assembly
A grid-controlled electron gun and fixture technology, which is applied to manufacturing tools, workpiece clamping devices, electrode assembly manufacturing, etc., can solve the problems of complex alignment procedures, low assembly accuracy and low accuracy of grid-controlled electron guns without interception.
Active Publication Date: 2016-07-13
INST OF ELECTRONICS CHINESE ACAD OF SCI
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[0013] However, in the process of realizing the present invention, the applicant found that during the assembly process of the above-mentioned non-intercepting grid-controlled electron gun, the grid wire alignment process of the control grid and the shadow grid is complicated and the precision is low, resulting in poor assembly accuracy of the non-interception grid-controlled electron gun. High, the interception of the electron beam by the control grid is very large
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...
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The invention provides a fixture and a grid alignment method for assembling a non-intercept grid-controlled electron gun. The fixture includes: a positioning cover and N positioning screws. Wherein, the positioning cover has a dome-shaped structure, and its middle position forms a hollow cylinder axially downward, and the middle through hole of the hollow cylinder serves as an observation window; N screw holes, N positioning screws pass through the corresponding screw holes respectively, and extend into N positioning circular holes around the cylindrical structure of the grid head, and the positioning cover forms M welding through holes axially in the circumferential direction. The invention can efficiently align the control grid and the shadow grid, and adjust the parallelism and concentricity between the control grid and the upper surface of the cathode, thereby ensuring the structural parameters among key parts such as the cathode, shadow grid and control grid.
Description
technical field [0001] The invention relates to the field of electric vacuum technology in the electronics industry, in particular to a fixture and a grid alignment method for assembling a grid-controlled electron gun without interception. Background technique [0002] Grid-controlled traveling wave tubes are widely used in radar transmitters due to their stable operation, low adjustment voltage, wide frequency band, high power, relatively simple ventilation and heat dissipation structure design, small size, and light weight. Installing a control grid between the cathode and the anode constitutes a grid-controlled electron gun, and this method of controlling the electron injection is called grid control. In this case, cathode electron emission is turned off by applying a negative DC potential across the control grid, or controlled by applying a positive pulse modulation signal. Because the distance between the control grid and the cathode is very close, the electron beam ca...
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IPC IPC(8): H01J9/18B25B11/02
Inventor 易红霞肖刘尚新文曹林林陈之亮李延威袁广江王莉
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI