High-frequency induction brazing method for connection of deep cavity inner conductor of coaxial transmission line

A high-frequency induction brazing and coaxial transmission line technology, which is applied in the direction of connection, welding equipment, line/collector parts, etc., can solve the problems of large investment in equipment, failure to meet high-precision requirements, deformation of inner conductors, etc., and achieve equipment Low investment, guaranteed long-term reliability, and the effect of reducing the limitation of design length

Active Publication Date: 2009-10-14
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the inner conductor connection method in the prior art makes the inner conductor too deformed to meet the high-precision requirements and requires a lot of equipment inves

Method used

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  • High-frequency induction brazing method for connection of deep cavity inner conductor of coaxial transmission line
  • High-frequency induction brazing method for connection of deep cavity inner conductor of coaxial transmission line
  • High-frequency induction brazing method for connection of deep cavity inner conductor of coaxial transmission line

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Experimental program
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Effect test

Embodiment 1

[0031] see figure 1 and figure 2 , for a T-shaped coaxial transmission line, it includes a hollow outer conductor 1 and an inner conductor 2, the deep cavity depth of the hollow outer conductor 1 is H=60mm, and the diameter D=30mm; the inner conductor 2 is composed of two conductors connected to form a T-shaped, two The diameter of the conductor is d=10mm, and the corresponding connecting ends of the two conductors are the correspondingly matched threaded holes and the screw rod 3 respectively, and linear solder is placed in the undercut 4 at the joint of the correspondingly matched threaded holes and the screw rod 3, And the length of the linear solder line is greater than 2.5 times the circumference of the corresponding inner conductor welding; and the two conductors are tightened correspondingly; the ring-shaped induction coil 5 with a diameter of 12 mm is inserted into the deep cavity of the hollow outer conductor 1 , set at the connection of the inner conductor end;

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Embodiment 2

[0034] see Figure 5 , for the T-shaped structure, the depth of the deep cavity of the hollow outer conductor 1 is H=80mm, and the diameter D=24mm; the diameter of the two conductors is d=10mm, the cavity is deep, and the space is small. The protruding end of the inner conductor is coaxially connected to the auxiliary conductor 6, the diameter of the induction coil 5 is 18mm, and the ring-shaped induction coil 5 is set on the auxiliary conductor 6, and the others are the same as in the first embodiment.

[0035] When the power of the high-frequency generator is 5KW, a wire coil with a diameter of Φ0.5mm is used, and the alloy composition is Sn63Pb37. The induction brazing parameters are set as: power ratio 55%, and welding heating time 80 seconds.

Embodiment 3

[0037] see image 3 and Figure 4 , for the L-shaped structure, the depth of the deep cavity of the hollow outer conductor 1 is H=60mm, and the diameter D=16mm; the diameter of the two inner conductors is d=5mm, the space is small, and the inner conductor stretches near the connection of the inner conductor end The output end is coaxially connected to the auxiliary conductor 6, the diameter of the induction coil 5 is 10mm, and the ring-shaped induction coil 5 is set on the auxiliary conductor 6, and the others are the same as in the first embodiment.

[0038] In the case of high-frequency generator power 5KW, diameter Φ0.5mm linear solder coil, alloy composition is Sn96.5Ag3.0Cu0.5 induction brazing parameters are set as: power ratio 40%, welding time 35-40 seconds.

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Abstract

The invention relates to a high-frequency induction brazing method for the connection of a deep cavity inner conductor of a coaxial transmission line. The coaxial transmission line consists of an inner conductor and a hollow outer conductor. The inner conductor is connected with two conductors to form a T shape or an L shape and the brazing method comprises the following steps: the connection ends of the two conductors are respectively provided with a threaded hole and a screw rod; a tool withdrawal groove at the joint of the threaded hole and the screw rod is provided with welding wires or coated with solder pastes; and the two conductors are screwed to lead an induction coil to be sleeved at the end joints of the deep cavity inner conductor or the joints between a supplementary conductor and the inner conductor. The welding conditions are as follows: the power, power rate and heating and electrifying time of a high frequency generator are respectively 5KW, 30-60 percent and 6-80 seconds. In the induction heating brazing, the local temperature of the weld joint of a workpiece can meet the requirement of the brazing temperature rapidly and solders are spread evenly. Compared with the integrative heating method, the heat absorbed by the workpiece has small heat input and centralized heat. The high-frequency induction brazing method utilizes the internal thermal conductance of the workpiece to cool water or assist water cooling, thereby rapidly realizing the brazing connection of the connection ends and high quality of weld seams.

Description

technical field [0001] The invention relates to a brazing connection method for two ends of an inner conductor located in a deep cavity of an outer conductor of a coaxial transmission line. Background technique [0002] A coaxial transmission line composed of an inner conductor and a hollow outer conductor is widely used in the interconnection of antennas and radio frequency transmitters or radio frequency receivers, and its function is to effectively transmit electromagnetic energy. The RF coaxial transmission line formed by connecting the RF coaxial connector and other coaxial components becomes the main component of the RF coaxial transmission system. Radio frequency coaxial transmission line, which is a key component of transmitting signals in radar, radio frequency relay stations and communication systems, and is more and more widely used in high-speed data transmission equipment, and its role is becoming more and more important. With the improvement of light weight an...

Claims

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Application Information

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IPC IPC(8): H01R43/02B23K1/002
Inventor 解启林刘炳龙宋为民汪芳宝
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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