A method of manufacturing a cavity filter cover plate

Abstract

The invention provides a manufacturing method for a cavity filter cover plate. The manufacturing method comprises the steps that material selection is performed; positioning is performed; tuning threaded holes are processed, plate material is stretched by an oil hydraulic stretching machine, the copper surface of the cover plate is stretched to the aluminum surface in stretching, a stretching mold is provided with multiple working positions according to the thickness and material requirements of the plate material, and the plate material of which the positions of the tuning threaded holes on the cover plate are determined is rapidly stretched to the initial working position firstly after starting of stretching; then multiple times of stretching from fast to slow is performed; and after the plate material is stretched to the last working position by the oil hydraulic stretching machine, the stretching machine starts to slowly return to the original position, the processing head of the stretching machine reversely ejects for multiple times rapidly in the returning process, the stretching machine returns to the original position after multiple times of reverse ejecting, then a boss which is integrated with the cover plate is processed at the positions of the tuning threaded holes by the oil hydraulic stretching machine, and the middle part of the boss is hollow. The stretching problem is processed by the oil hydraulic machine, and yield rate is higher and the manufacturing effect is better in comparison with a conventional mode of punching through a punching machine.

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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