Titanium/steel dissimilar metal plasma shunt melting electrode arc brazing device and method based on pulse coordination control

A technology of coordinated control and dissimilar metals, applied in arc welding equipment, auxiliary devices, metal processing, etc., can solve problems such as easy oxidation of titanium and brazing seams, unfavorable economic requirements, large heat-affected zone, etc., to achieve improved Mechanical properties, beautiful forming, and high melting efficiency

Active Publication Date: 2019-01-18
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize the welding of titanium and steel in the atmospheric environment, and the welded joint after welding can withstand 1MPa air pressure, but there are still limitations: 99.95% silver wire solder can cause huge welding costs, which is not conducive to actual production economical requirements; the heat-affected zone produced by the arc welding process of argon arc welding is relatively large, and there will be more serious deformation problems after welding; only the molten pool protection during the welding process is used, and the titanium and brazed seams are cooled during the cooling process Prone to oxidation and nitriding

Method used

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  • Titanium/steel dissimilar metal plasma shunt melting electrode arc brazing device and method based on pulse coordination control
  • Titanium/steel dissimilar metal plasma shunt melting electrode arc brazing device and method based on pulse coordination control
  • Titanium/steel dissimilar metal plasma shunt melting electrode arc brazing device and method based on pulse coordination control

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Embodiment 1

[0026] Aiming at the problems of easy formation of brittle intermetallic compounds, poor joint performance, high cost, complex equipment, and poor stability during titanium / steel welding, a titanium / steel dissimilar metal plasma shunt molten electrode arc brazing device based on pulse coordinated control was proposed and methods.

[0027] The present invention is a titanium / steel dissimilar metal plasma split melting electrode arc brazing method based on pulse coordination control. Composition of welding torch, wire feeding mechanism, current sensor, etc. During the welding process, the method of pulse coordination control is adopted, that is, when the main circuit current is the base value, the shunt current is also the base value, which can ensure the stability of the coupling arc during welding; when the main circuit current is the peak value, the shunt current is also peak, which ensures low workpiece heat input during welding for a stable and reliable welding process. D...

Embodiment 2

[0033] combine figure 1, which is an embodiment of titanium / steel butt joint plasma shunt melting electrode arc brazing based on pulse coordinated control. Contact tip 5, wire feeding mechanism 6, solder wire 7, shunt power supply 8, plasma nozzle 9, protective gas cover 10, titanium plate 11, steel plate 12, pulse signal processor 13, signal controller 14, pulse coordination control system 15 , current sensor 19, plasma shunt melting electrode torch 21 and other components. During the welding process, the positive pole of the main power supply 1 is connected to the solder wire 7, and the negative pole is connected to the workpiece; the positive pole of the shunt power supply 8 is connected to the solder wire 7, and the negative pole is connected to the water-cooled copper sleeve 3, and the plasma arc 16 is connected to the plasma nozzle 8 to form a shunt circuit; During the welding process, the MIG arc 18 and the plasma arc 16 are coupled to form a composite arc 17; the puls...

Embodiment 3

[0041] combine figure 2 , which is an embodiment of plasma shunt molten electrode arc brazing of titanium / steel lap joints based on pulse coordinated control. , conductive tip 5, wire feeding mechanism 6, solder wire 7, shunt power supply 8, plasma nozzle 9, protective gas cover 10, titanium plate 11, steel plate 12, pulse signal processor 13, signal controller 14, pulse coordination control system 15. Current sensor 19, plasma shunt melting electrode torch 21 and other components. During the welding process, the positive pole of the main power supply 1 is connected to the solder wire 7, and the negative pole is connected to the workpiece; the positive pole of the shunt power supply 8 is connected to the solder wire 7, and the negative pole is connected to the water-cooled copper sleeve 3, and the plasma arc 16 is connected to the plasma nozzle 8 to form a shunt circuit; During the welding process, the main arc 18 and the plasma arc 16 are coupled into a composite arc 17; th...

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Abstract

The invention discloses a titanium / steel dissimilar metal plasma shunt melting electrode arc brazing device and method based on pulse coordination control. The device comprises a main welding power supply 1, a shunt power supply 8, a pulse coordination controller 13, a back-pull protection gas cover 2, a plasma shunt melting electrode welding gun 21, a wire feed mechanism 6, a current sensor 19 and the like. In the welding process, a pulse coordination control method is adopted, that is, when the main circuit current is a basic value, the shunt current is also a basic value, and the arc coupling stability in the welding process can be ensured; when the main circuit current is a peak value, the shunt current is also a peak value, the low workpiece heat input during welding can be ensured, and the stable and reliable welding process is realized. Brazed seams are protection by the back-pull protection gas cover in the welding process, and the problems of oxidizing, nitriding and the likein the high-temperature cooling process of the brazed seams are avoided.

Description

technical field [0001] The invention relates to the technical field of arc welding and brazing of dissimilar metals, in particular to a device and method for plasma shunting molten electrode arc brazing of titanium / steel dissimilar metals based on pulse coordination control. Background technique [0002] Titanium has high specific strength and high specific rigidity, good heat resistance to withstand high temperature, and good corrosion resistance. It is widely used in ships, aviation, aerospace, petrochemical and other fields. However, the high cost and poor processing performance of titanium alloy limit its further application in the industrial field. Steel is the most widely used metal material in industrial production. It has the advantages of low cost, high mechanical strength, good toughness, and excellent processing performance. In consideration of weight reduction, cost reduction and special performance, titanium and steel can be "utilized" and complement each other...

Claims

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Application Information

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IPC IPC(8): B23K1/00B23K1/20B23K9/173B23K3/00B23K3/08B23K103/24B23K101/18
CPCB23K1/00B23K1/20B23K3/00B23K3/08B23K9/173
Inventor 苗玉刚林志成刘吉马照伟韩端锋杨晓山杨思蝶
Owner HARBIN ENG UNIV
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