Quick welding process for cavity filter

Abstract

The invention discloses a quick welding process for a cavity filter. The process comprises the following steps of: 1, cleaning the upper surface of a cavity and a part, which contacts with the upper surface of the cavity, of a cover body; 2, coating a solder on the surface of the part, which contacts with the upper surface of the cavity, of the cover body; 3, buckling the cover body on which the solder is coated on the cavity, and locking the cover body and the cavity; and 4, placing the cavity and the cover body, which are locked, into a coil of a high-frequency induction welder, and switching on the high-frequency induction welder to enable the high-frequency induction welder to output current and generate heat for heating to finish the welding of the cover body and the cavity. The invention has the beneficial effects that the quick welding process is used for finishing the welding of the cavity and the cover body, so that the assembly efficiency can be greatly improved, and the material cost can be lowered; screw holes are not required, so that the machining time and the machining cost are saved; and the wall thickness of the cavity is greatly decreased, so that the material cost is further lowered, the dimensional accuracy during the casting of the cavity is reduced, and the machining cost is also lowered.

Description

technical field [0001] The invention relates to the technical field of cavity filters, in particular to a fast welding process for cavity filters. Background technique [0002] As a frequency selection device, filters are widely used in the field of communication, especially in the field of radio frequency communication. In the base station, the filter is used to select the communication signal and filter out the clutter or interference signal outside the frequency of the communication signal. [0003] At present, a cavity filter is generally used in a base station system, and the cavity filter includes components such as a cavity, a cover plate, an inner conductor, and a PCB board. During processing, the cover plate and the cavity are connected by screws, that is, a screw hole is set on the upper surface of the cavity, and a through hole through which the screw can pass is set on the cover plate. The screw holes are matched and connected, so that the cover plate is fasten...

AI Technical Summary

Problems solved by technology

[0004] Due to the need to seal the signal, the number of screws that need to be set is very large, resulting in very low assembly efficiency and a corresponding increase in material costs

In addition, it is necessary to set a corresponding number of screw holes on the cavity and a corresponding number of through holes on the cover plate, which increases the processing cost and time

And the fastening structure is assembled with screws. In order to cooperate with the setting of screw holes on the cavity, the wall thickness of the cavity needs to be set to a thickness sufficient to set the screw holes. This thickness is usually 4-5mm, resulting in a thicker wall thickness of the cavity, which also improves At the same time, the increase of the wall thickness of the cavity makes the space for installing the inner conductor in the cavity smaller. In order to ensure the smooth installation of the inner conductor, it is necessary to improve the dimensional accuracy during casting, which also increases the processing cost.