Method for presetting multilayer panel slot antenna brazing filler metal

Abstract

The invention discloses a method for presetting multilayer panel slot antenna brazing filler metal. The method comprises the first step of cleaning a base board, heat-resistant glass or ceramic, the brazing filler metal, panel slot antenna parts and a pressing board; the second step of assembling the panel slot antenna parts and the brazing filler metal, the third step of arranging the base board, the heat-resistant glass or ceramic, the brazing filler metal, the panel slot antenna parts and the pressing board in a vacuum furnace horizontally, carrying out vacuum-pumping, heating the vacuum furnace when the vacuum degree reaches 10<-3>Pa or more than 10<-3>Pa, increasing the temperature and keeping the temperature in a sectional mode, stopping heating after keeping the temperature for 5-15min when the temperature of the furnace is uniform and is located between the liquidus temperature of the brazing filler metal and the solidus temperature of the parts, then cooling the parts, and taking out the parts when the temperature of the furnace is cooled to be the normal temperature; the fourth step of checking whether a soldering seam texture meeting the technological requirements is formed on the contact face of the parts and the brazing filler metal or not. According to the method, the needed devices and the technological devices are simple, the brazing filler metal does not need to be processed and is preset accurately, assembly process is simplified and qualified rate is improved.

Description

technical field [0001] The invention relates to a brazing material presetting method for a multi-layer flat plate crack antenna, in particular to a brazing material presetting method for vacuum brazing of multi-cavity precision and complex parts, and belongs to the brazing technical field. [0002] Background technique [0003] The multilayer planar slot antenna is an antenna that processes cracks on the waveguide or cavity resonator to radiate or receive electromagnetic waves. It is generally composed of a summator, a power distribution network, and a waveguide slot radiation front. The multi-layer flat plate slot antenna has high radiation efficiency, can realize precise aperture distribution control and obtain low sidelobe performance, stable beam pointing, large power capacity, compact structure, thin thickness, light weight and high reliability. Excellent electrical and structural It has been widely used in airborne early warning radar, airborne weather radar, missile ...

AI Technical Summary

Problems solved by technology

However, because each layer of the flat plate crack antenna is different and usually has a large number of fine cavities and cracks, and the width of many welds is less than 0.5mm, therefore, there are many types of solder processed according to the shape of the contact surface between the layers It is complex and often requires precision high-speed milling or high-precision laser cutting, which is costly and difficult to process; in addition, because the parts and solder are very thin and highly complex, even if such solder is processed, it is very soft and will be severely deformed. Distorted or even broken, cannot be fixed precisely in the intended position during assembly

This solder presetting method is difficult and very cumbersome, and the qualified rate is very low

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