A kind of manufacturing method of cavity filter cover

Abstract

A method for manufacturing a cavity filter cover plate, including material selection, positioning, and processing tuning threaded holes, stretching the plate through a hydraulic stretching machine, stretching the copper side of the cover plate facing the aluminum side during stretching, According to the thickness of the plate and the material requirements, the stretching mold is equipped with multiple stations. After the stretching starts, the plate at the position of the tuning threaded hole on the cover plate is quickly stretched to the initial station, and then from fast to slow. Multiple times of stretching, after the hydraulic stretching machine stretches the sheet to the final position, the stretching machine slowly returns to its original position, and the processing head of the stretching machine quickly reverses several times during the process of returning to its position. The stretching machine returns to its original position after being reversed for many times. At this time, the hydraulic stretching machine processes a boss integrated with the cover plate at the position of the tuning threaded hole. The middle part of the boss is hollow. The present invention uses a hydraulic machine to process For the stretching problem, compared with the traditional method of punching holes with a punching machine, the present invention has a higher yield and a better manufacturing effect.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for manufacturing a cavity filter cover plate. Background technique [0002] At present, the signal processing of the cavity filter is usually completed by the tuning self-locking screw on the filter cover. Generally speaking, the problem dealt with by the tuning screw is the problem of signal intermodulation. Specifically, it refers to two different frequency signals. A signal of a new frequency generated by superposition within a system. [0003] The current common method of manufacturing filter cover plates usually uses pure copper materials or metal materials with electroplated copper on the surface, which is relatively expensive. On the one hand, the stamping method is easy to damage the cover plate, and the defective rate is high. On the other hand, the processed tuning hole needs to be additionally installed with a tuning screw sleeve. The installation of the tu...

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Problems solved by technology

[0003] The current common method of manufacturing filter cover plates usually uses pure copper materials or metal materials with electroplated copper on the surface, which is relatively expensive. On the one hand, the stamping method is easy to damage the cover plate, and the defective rate is high. On the other hand, the processed tuning hole needs to be additionally installed with a tuning screw sleeve. The installation of the tuning screw sleeve not only requires labor costs and processing costs, but at the same time, the additional tuning screw sleeve installed on the tuning hole is not stable, and it is easy to loosen after a period of time. Moreover, the interface between the tuning hole and the tuning screw sleeve is not smooth, which ultimately affects the actual tuning effect

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