Manufacturing process of slow wave system for helix travelling wave tube

Abstract

The invention relates to a manufacturing process of a slow wave system for a helix travelling wave tube. The manufacturing process comprises steps that, (1), a helix and a clamping rod are put in a tube casing to form a slow wave before extrusion; (2), the slow wave before extrusion is put in an extrusion tool, the position corresponding to the clamping rod is aligned with a pressing head of the extrusion tool, pressing force is exerted through the extrusion tool to make the tube casing, the clamping rod and the helix to realize tight contact; (3), a white copper ring and a pure iron pole shoe are sleeved outside the tube casing, an AgCu welding material is filled, and the parts are sent to a hydrogen furnace; (4), the temperature curve of a hydrogen furnace is set as follows, the temperature increasing / decreasing speed is 15DEG C / min, the soldering temperature is 780 DEG C, the insulation time is 2 minutes, and the parts are taken out after soldering; and (5), whether the clamping rod and the helix of the slow wave system generate displacement and whether the welding material is fully melted are detected through a microscope. According to the manufacturing process, structure soundness and thermal diffusivity of the slow wave system are greatly improved through the hot compression effect, and bearable power of the whole tube can be improved correspondingly.

Description

technical field [0001] The invention belongs to the field of microwave electric vacuum devices, in particular to a manufacturing process of a slow wave system for a helical traveling wave tube. Background technique [0002] In the development process of the helical traveling wave tube slow wave system, in order to further increase the heat dissipation capacity of the slow wave system, it is possible to increase the contact area between the clamping rod, the slow wave line and the shell by using high thermal conductivity materials and increasing the The tightness of clamping is achieved. There are many types of clamping and fixing methods between the slow wave line, the clamping rod and the metal shell. The commonly used methods are the cold spring compression method and the thermal compression method. However, the cold spring compression method must have good elasticity because the shell must have good elasticity. Therefore, it must be elastic stainless steel or Monel mater...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the heat dissipation capacity of the slow wave system produced by the conventional cold spring pressing process and heat shrinking process is insufficient. In order to enhance the heat dissipation capacity of the slow wave system, it is necessary to further improve the slow wave manufacturing process

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