Cavity filter cover plate tin printing and assembling method and auxiliary tool

Abstract

The invention provides a cavity filter cover plate tin printing and assembling method and an auxiliary tool. The method comprises the following steps that (1) a printing machine is adopted to print tin on a cover plate; (2) the cover plate subjected to tin printing is transferred to an auxiliary tool, the auxiliary tool covers the side, subjected to tin printing, of the cover plate, and an open groove corresponding to a tin printing path of the cover plate and an open hole corresponding to a screw hole in the cover plate are formed in the auxiliary tool; (3) a screw rod is assembled on the cover plate, the screw rod penetrates through the screw rod hole in the cover plate and the open hole in the auxiliary tool, and metal filings are cleaned after assembly; and (4) the auxiliary tool is removed, and the tin-printed surface of the cover plate is welded with the cavity. According to the cover plate tin printing and assembling technology, after the cover plate is subjected to tin printing, the auxiliary tool is adopted for protecting solder paste and supporting the cover plate to penetrate through the screw rod, cleaning can be conducted after the screw rod penetrates through, then the cover plate is welded, generation of metal wires and scraps in a cavity is substantially reduced fundamentally, the product quality is guaranteed, and the risk of cover opening and reworking is reduced.

Description

technical field [0001] The invention relates to the field of cavity filters, in particular to a method of tin printing and assembling a cover plate of a cavity filter and an auxiliary tooling. Background technique [0002] Cavity filter is a frequency selection device widely used in the communication field. The cavity filter cavity and cover plate need to be assembled and fixed. Cover plate welding is more and more widely used as a means of light weight and miniaturization of products. Application, limited by the structure of the cavity, the solder paste is usually printed or tinned. [0003] For cover plate welding products, if there is a boss on the cavity mounting surface, the cavity rib printing process cannot be used, and only the cover plate tin printing process or tinning on the cavity ribs can be used. [0004] Among them, tinning on the cavity ribs has extremely high requirements on the flatness of the cavity ribs, and it takes a long time and the efficiency is low...

AI Technical Summary

Problems solved by technology

The limitations of this assembly process are: use a tin spotting machine to spot tin on the cavity ribs. Although it prevents metal wires and shavings from falling into the cavity when threading the screw, it takes a long time to spot tin (depending on the complexity of the product structure, usually Dozens or hundreds of times the man-hours of the tin printing process); the accuracy of tin spotting by the tin spotting machine is poorly controllable, and tin cannot be applied quantitatively according to product requirements

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