Integrated forming methods of wave guide transformation coupler inner cavity and coupler and forming tool of wave guide transformation coupler inner cavity

Abstract

The invention discloses integrated forming methods of a wave guide transformation coupler inner cavity and a coupler and a forming tool of the wave guide transformation coupler inner cavity. The integrated forming method of the coupler inner cavity comprises the steps of clamping a workblank, positioning the workblank, conducting compression forming on the coupler inner cavity, and fetching a workpiece. The integrated forming method of the coupler comprises the integrated forming steps of the coupler inner cavity and general machining steps. The forming tool is used for realizing the integrated forming of the coupler inner cavity. According to the methods and the tool, the wave guide transformation coupler inner cavity is formed by extrusion with a mould, and then, the wave guide transformation coupler is formed integrally; intermediate processes are reduced; the links, such as erection welding of thin-wall oxygen-free copper parts, in which deformation occurs easily, are avoided; the obtained wave guide transformation coupler is high in strength and good in microwave transmission performance, and does not deform easily; the machining technology is simple; the repeatability and the consistency are good; and the performance and the qualification rate of a microwave device are ensured.

Description

technical field [0001] The invention relates to the field of microwave devices, relates to a traveling wave tube, and in particular to an inner cavity of a waveguide transformation coupler, a method for integrally forming the coupler and a forming tooling. Background technique [0002] The waveguide conversion coupler is a very important part of microwave devices. It is a key component connecting the slow wave system and the energy input and output windows in the traveling wave tube. Its function is to couple microwave signals into and out of the slow wave system, and Play the role of matching the impedance of the slow wave system and the impedance of the window standard waveguide. In order to meet the functional requirements of microwave devices, the waveguide conversion coupler should have good microwave transmission characteristics. Since the waveguide transformation coupler is usually used as a part of the slow wave system and is limited by the magnetic field, the struc...

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Problems solved by technology

[0003] The existing waveguide conversion coupler is usually assembled and welded by multiple parts. In order to reduce loss and increase heat dissipation, the material of the parts is mostly oxygen-free copper, and the thickness is very thin; these parts are easily deformed during the assembly and welding process. , causing the microwave transmission characteristics of the waveguide transformation coupler to deteriorate; the slow wave system of the traveling wave tube and the energy input and output devices cannot achieve a good matching effect, and even the reflection caused by the deformation of the waveguide transformation coupler will make the traveling wave tube The wave tube oscillates, making the traveling wave tube unable to work properly

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