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Induction brazing device and method thereof

A technology of induction brazing and induction power supply, which is used in electric heating devices, welding equipment, metal processing equipment, etc., can solve the problem that the reaction between the solder and the oxide film is not uniform and sufficient, the temperature distribution of the joint is not uniform, and the heating temperature is difficult to accurately control, etc. problems, to ensure uniform spreading, improve welding efficiency, and reduce welding time.

Inactive Publication Date: 2008-06-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has certain disadvantages, mainly due to the high speed of induction heating. When welding thicker weldments, the following situations will occur: ①The heating temperature of the joint is difficult to control accurately, and it is easy to cause the loss and uneven distribution of solder; ②The joint The temperature distribution is not uniform enough, and the reaction between the solder and the oxide film is not uniform and sufficient.
The above two points cause the joint welding rate to decrease and affect the welding quality

Method used

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  • Induction brazing device and method thereof
  • Induction brazing device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Referring to Fig. 1, it is butt brazing of two short cylindrical solid low-carbon steel weldments 3 with a thickness of Φ32 and a thickness of 8 mm, and the brazing filler metal is copper-based brazing filler metal. Place an air ultrasonic probe 11 directly above the welding section, the distance between the probe surface and the upper surface of the weldment 3 is 150 mm, the probe diameter is Φ30, the center frequency is 0.1 MHz, and the amplitude of the oscillation voltage output by the high frequency oscillator 9 is is 850V.

[0017] The welding is heated by an intermediate frequency induction power supply, and the air ultrasonic probe 11 is connected to the high frequency oscillator 9, the induction coil 1 and the intermediate frequency induction power supply 10 at the same time. After welding, the high frequency oscillator 9 and the intermediate frequency induction power supply 10 are disconnected at the same time.

[0018] After testing, welding part...

Embodiment 2

[0019] Embodiment 2: Referring to Fig. 2, it is butt brazing of two Φ25 long cylindrical solid low-carbon steel weldments 3 with a length of 150 mm, and the brazing filler metal is copper-based brazing filler metal. Place two air ultrasonic probes 11 symmetrically on the side of the welding section, the distance between the probe surface and the side of the weldment 3 is 110 mm, the probe diameter is Φ20, the center frequency is 0.1 MHz, and the amplitude of the oscillation voltage output by the high frequency oscillator 9 is 800V.

[0020] Welding is heated by an intermediate frequency induction power supply. The two air ultrasonic probes 11 are connected to their respective high frequency oscillators, induction coils 1 and intermediate frequency induction power supply 10 at the same time. After welding is completed, the high frequency oscillator and intermediate frequency induction power supply are disconnected at the same time. 10.

[0021] After testing, welding parts wit...

Embodiment 3

[0022] Embodiment 3: Referring to Fig. 3, it is the butt brazing of two tubular low-carbon steel weldments 3 with an outer diameter of Φ25mm, a wall thickness of 3mm, and a length of 150mm, and the brazing filler metal is copper-based brazing filler metal. Place two air ultrasonic probes 11 symmetrically on the side of the welding section, the distance between the probe surface and the side of the weldment 3 is 100 mm, the probe diameter is Φ20, the center frequency is 0.1 MHz, and the amplitude of the oscillation voltage output by the high frequency oscillator 9 is 850V.

[0023] Welding is heated by high-frequency induction power supply, and the two air ultrasonic probes 11 are connected to their respective high-frequency oscillators, induction coil 1 and high-frequency induction power supply 10 at the same time. After welding is completed, the high-frequency oscillator and high-frequency Frequency induction power supply 10.

[0024] After testing, welding parts with the sa...

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Abstract

The invention discloses an induction brazing device, comprising an induction power supply and induction coil. The invention is characterized in that an air-medium Ultrasonic probe is at least included; the air-medium ultrasonic probe is in electrical connection with a high frequency oscillator. The invention also discloses a high frequency braze welding method which uses the induction brazing device, and comprises the steps as follows: select at least one air-medium ultrasonic probe with different diameters according to the size of the connection area or complex degree; adjust the center frequency of the air-medium ultrasonic probe, the oscillating voltage amplitude of the high frequency oscillator output, and the distance between the air-medium ultrasonic probe and weld assembly connector; meanwhile connect the air-medium ultrasonic probe with the oscillator, and connect the induction coil with the induction power supply to complete the welding. Comparing with the dependant use of induction coil and induction power supply when welding the same diameter welding parts, the current output value of the induction power supply and the welding time are all reduced by 10 to 20 percent after being tested; the energy is saved and the welding efficiency is improved.

Description

technical field [0001] The invention relates to an induction brazing device, and also relates to an induction brazing method using the induction brazing device, in particular to an air ultrasonic-assisted induction brazing method. Background technique [0002] Referring to FIG. 1 , a known induction brazing device includes an induction power source 10 and an induction coil 1 . Induction brazing is a method of heating the solder 2 and the weldment 3 with an induction heat source 10 to melt the solder 2 and fill the joint surface to realize joint welding. This method is widely used in industrial production. However, this method also has certain disadvantages, mainly due to the high speed of induction heating. When welding thicker weldments, the following situations will occur: ①The heating temperature of the joint is difficult to control accurately, and it is easy to cause the loss and uneven distribution of solder; ②The joint The temperature distribution of the solder is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/002B23K3/047
Inventor 马铁军杨思乾
Owner NORTHWESTERN POLYTECHNICAL UNIV
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