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Braze welding method of slot antenna

A brazing method and slot antenna technology, which are applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as the inability to meet the requirements of multi-layer flat slot antennas, achieve enhanced film removal effect, reduce dosage, and improve use efficiency Effect

Active Publication Date: 2012-08-08
CHENGDU SIWI HIGH TECH IND GARDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that salt bath brazing and vacuum brazing in the prior art cannot meet the requirements of multi-layer flat-panel slot antennas, and provide a brazing method for slot antennas

Method used

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  • Braze welding method of slot antenna
  • Braze welding method of slot antenna
  • Braze welding method of slot antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: as Figure 1-2 Shown, a kind of brazing method of slot antenna comprises the following steps:

[0021] A. Assembly positioning before welding: use the gap between the mating surfaces of the parts, combine them by turning riveting and match them with positioning base plates, counterweight blocks and pins for parts positioning;

[0022] B. Solder flux fixation: place solder and flux on the positioning sinking welding step;

[0023] C. Welding: Put the parts into the vacuum brazing furnace, firstly evacuate the furnace, start heating when the pressure in the furnace reaches 2Pa, and after the temperature of the parts reaches 180-280°C, close the vacuum system and fill the furnace with high temperature Pure nitrogen to 4000-6000Pa, heat up to 540°C, keep warm until the temperature of the parts reaches 530°C, then continue to heat up to 630°C, keep warm until the temperature of the parts reaches 600-610°C, stop heating, fill high-purity nitrogen to 90000Pa, st...

Embodiment 2

[0025] Embodiment 2: as Figure 1-2 Shown, a kind of brazing method of slot antenna comprises the following steps:

[0026] A. Assembly positioning before welding: use the gap between the mating surfaces of the parts, combine them by turning riveting and match the positioning base plate, counterweight block and pins for parts positioning, place the assembled parts on the base plate, and place them in an appropriate position Use pressure weights;

[0027] B. Solder flux fixation: place solder and flux on the positioning sinking welding step, place the solder at the fillet weld where the two parts meet, and the solder is HF202 or HF201;

[0028] C. Welding: Put the parts into the vacuum brazing furnace, firstly evacuate the furnace, start heating when the pressure in the furnace reaches 2Pa, and after the temperature of the parts reaches 180-280°C, close the vacuum system and fill the furnace with high temperature Pure nitrogen to 4000-6000Pa, heat up to 540°C, keep warm until...

Embodiment 3

[0029] Embodiment 3: as Figure 1-2 Shown, a kind of brazing method of slot antenna comprises the following steps:

[0030] A. Assembly positioning before welding: use the gap between the mating surfaces of the parts, combine them by turning riveting and match them with positioning base plates, counterweight blocks and pins for parts positioning. The material of the base plate is required to be stainless steel, and the size around the shape is 300mm* 300mm, thickness 8-12mm, dig out 4 deep 4-8mm weight-reducing chambers, drill a number of cooling holes with a spacing of 15-20mm, and the flatness is not greater than 0.05mm. When processing parts, ensure that the inner cavity width of the waveguide cover plate is 0.02mm-0.05mm wider than the shape of the waveguide cavity. The corners need to be repaired by a fitter. Before placing the counterweight at the appropriate position on each side, ensure the assembly clearance of the welding seam.

[0031] B. Solder and flux fixation:...

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Abstract

The invention discloses a braze welding method of a slot antenna, comprising the following steps: utilizing matching surface gaps among all parts to out part positioning by combination of rivet turning as well as a positioning base plate, a weight pressing block and pins; fixing welding flux and a welding agent: placing the welding flux and the welding agent at positioning sink welding steps; placing parts into a vacuum braze welding furnace, firstly vacuumizing the interior of the furnace, starting to heat when the pressure in the furnace reaches 2Pa, closing the vacuumizing system after the temperature of the parts reach 180-280 DEG C,, then introducing high-purity nitrogen into the furnace till the pressure is 4000-6000Pa, heating to 540 DEG C, preserving heat till the temperature of the parts reaches 530 DEG C, then continuously heating to 630 DEG C, preserving heat till the temperature of the parts reaches 600-610 DEG C, stopping heating, introducing high-purity nitrogen till the pressure is 90000pa, starting up a cooling fan to cool the parts to below 100DEG C, and then discharging the parts out of the furnace. By utilizing the braze welding method, the requirements of more high-accuracy, small-volume welding seams and slot antennas with complex positions are met.

Description

technical field [0001] The invention relates to a brazing method of a slot antenna, in particular to a brazing method of a multilayer flat-panel slot antenna. Background technique [0002] Slot antenna refers to the antenna formed by slots on the conductor surface. Multi-layer flat-panel slot antenna technology is widely used in modern radar technology. At present, the brazing methods of the slot antenna mainly include salt bath brazing and vacuum brazing. Salt bath brazing is a process in which the weldment is partially or entirely immersed in a salt mixture solution, and brazing is achieved by relying on the heat of the liquid medium. Vacuum brazing is a process of heating the welded parts that have been assembled with solder in a vacuum environment, and using a series of physical and chemical reactions that are beneficial to brazing under vacuum conditions to achieve film removal and wetting to form a brazing process. [0003] Multi-layer flat panel slot antenna, especi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20
Inventor 刘志远
Owner CHENGDU SIWI HIGH TECH IND GARDEN
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