Tooling mold for spherical grid forming and spherical grid forming method

Abstract

The invention discloses a tool die for forming of a spherical grid mesh and a forming method of the spherical grid mesh. The tool die comprises a forming base, a positioning press block, a height size control ring and a forming ball rod which are sequentially laminated, wherein the positioning press block is fixed on a top surface of the forming base by a positioning pin, a forming groove is formed in the top surface of the forming base, a ball at a rod head of the forming ball rod sequentially penetrates through a first through hole and a second through hole, and extends and drops into the forming groove in a matching way, the first through hole is formed in the height size control ring, the second through hole is formed in the positioning block, the groove shape and the size of the forming groove are the same as the spherical shape and the size of a planar grid mesh to be formed which is required to be processed into the spherical grid mesh, and surfaces of the forming base and the ball at the rod head of the forming ball rod are both in mirror surface shapes. The tool die has the beneficial effects of high operability and has the advantages of high accuracy and high polishing degree during grid mesh forming, large height range of the formed grid mesh and the like, and meanwhile, and the formed spherical grid mesh has the technical characteristics of high strength, fatigue resistance, thermal deformation resistance, no burr in surface and the like.

Description

Technical field [0001] The invention relates to a tooling mold and a grid forming method, in particular to a tooling mold for spherical grid forming and a spherical grid forming method, belonging to the technical field of grid manufacturing for electron guns of vacuum electronic devices. Background technique [0002] As a vacuum microwave power amplifier, traveling wave tube has the advantages of wide frequency bandwidth, large gain, high efficiency, and large output power. It has a wide range of applications in various military microwave transmitters and is known as the "heart" of weaponry. [0003] In the case of pulse operation, the working voltage of the grid control electron gun is much lower than that of the positive control electron gun or the focusing electrode control electron gun, and the control grid does not intercept or only intercepts a small part of the current, which greatly reduces the pulse modulator The high power, eliminating the difficulty of developing high-vo...

AI Technical Summary

Problems solved by technology

Among them, the advantage of the weaving processing method is that the processing technology is relatively simple, and the disadvantages are that the strength is not high enough, the reliability is poor, the precision is not high, it is easy to spark the grid, and it cannot be used for grid processing of complex shapes; the advantages of the electric discharge cutting method It has a high degree of automation and strong versatility, but there are still some shortcomings in terms of accuracy. In addition, because the surface of the grid produced by EDM is not easy to clean, there are often burrs and other black spots on the wire of the grid. Attachments lead to rough surface and burrs, which can easily cause the grid to catch fire, so that the grid intercepts a large current, which affects the performance and yield of the tube; chemical lithography has the advantages of high processing accuracy, high finish, and high pass rate. , has a great application prospect, but chemical lithography is often applied to the processing of planar grids, and there are deficiencies in the processing of spherical grids

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