A multifunctional positioning fixture for the production of radar slit waveguide antenna

Abstract

The invention discloses a multifunctional positioning fixture used for production of radar slotted waveguide antennas. The multifunctional positioning fixture comprises a tapered groove mandrel, a pressing mechanism and a central shaft. A tapered groove is formed in the outer surface of the tapered groove mandrel. An adjustment nut is connected to the upper portion of the tapered groove mandrel ina threaded mode. The pressing mechanism is connected to the lower portion of the tapered groove mandrel in the axial direction. The central shaft is connected to the lower portion of the pressing mechanism in the axial direction. A central shaft correction mechanism is arranged in the central shaft. A positioning pin is connected to the lower output end of the central shaft correction mechanism in the axial direction. A bolt is connected to the lower portion of the positioning pin in the axial direction through a washer. The whole multifunctional positioning fixture has the advantage of central shaft positioning and overcomes the defects of large gaps and low machining precision in the mandrel positioning process, the position precision of a shaft hole relative to main machining faces such as the upper and lower surfaces of a shaft body and a main bearing hole is effectively ensured, the center of the shaft hole is used for positioning to achieve machining, and thus, the positioning precision is improved.

Description

technical field [0001] The invention relates to the field of radar slotted waveguide antennas, in particular to a multifunctional positioning fixture for the production of radar slotted waveguide antennas. Background technique [0002] With the continuous enhancement of national defense in our country, the radar defense system is distributed all over the country, and the waveguide slot antenna is a typical planar array antenna, because of its high radiation efficiency, strong directivity, compact structure, light weight and many other advantages, It is widely used in the design of radar systems. However, the positioning fixtures used in the production of radar slotted waveguide antennas still have the following shortcomings during the use process: [0003] For example, the application number is 201710950054.8, and the patent name is an invention patent for a tunnel inverted arch multifunctional positioning fixture: [0004] Its positioning fixture can accurately position th...

AI Technical Summary

Problems solved by technology

However, for the measurement of special-shaped structural parts such as balls and space pipes, most of the existing combined fixtures cannot effectively clamp and position them;

[0007] (2) Most of the existing positioning fixtures used for the production of radar cracked waveguide antennas have the disadvantages of large gaps and low machining accuracy during the positioning process of the mandrel, and their practicability is poor

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