Plasma arc ultrasonic welding process and device

A plasma arc and ultrasonic welding technology, which is applied to welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of different welding equipment structures and no ultrasonic waves, and achieve improved welding quality, reduced welding deformation, and dense and uniform molten metal structure Effect

Inactive Publication Date: 2015-05-06
赵辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the principles of plasma arc welding and friction stir welding are different, and the structure of welding equipment is also different. The structure of ultrasonic vibration in friction stir welding cannot be directly used in plasma arc welding.
At present, there is no literature report on the application of ultrasonic waves in plasma arc welding.

Method used

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  • Plasma arc ultrasonic welding process and device

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Embodiment Construction

[0016] Plasma arc ultrasonic welding device of the present invention such as figure 1 As shown, it mainly includes a transducer 4 and a horn 3, the transducer 4 is fixedly connected to one end of the horn 3, and a cavity for accommodating the nozzle is provided at the other end of the horn 3, in the cavity A welding nozzle 2 is arranged in the middle, and the gap between the welding nozzle 2 and the cavity forms a protective gas chamber 15. The center of the welding nozzle 2 is provided with an electrode 1, and an annular cooling water chamber 9 is arranged inside the welding nozzle 2. The cooling water chamber 9 communicates with the water inlet pipe 12 and the water outlet pipe 13 on the welding nozzle 2 to form circulating cooling water to cool the welding nozzle 2 . The welding nozzle 2 is also provided with an ion gas intake pipe 10 , and the ion gas intake pipe 10 extends out of the horn 3 . The horn 3 is provided with a shielding gas intake pipe 11 communicating with t...

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Abstract

The invention provides a plasma arc ultrasonic welding process and device. The process is characterized in that in the plasma arc welding process, base metal beside a molten pool and a weld joint are ultrasonically vibrated in real time, molten metal tissue is dense and uniform, metal grains in the weld joint are refined, and welding stress and welding deformation are reduced. The device comprises an energy converter and an amplitude-change pole. The energy converter is fixedly connected to one end of the amplitude-change pole, the other end of the amplitude-change pole is provided with a cavity, a welding nozzle is arranged in the cavity, a protection gas cavity is formed in the gap between the welding nozzle and the cavity, an electrode is arranged in the welding nozzle, a cooling water cavity is formed in the welding nozzle, an ion gas inflow pipe is arranged on the welding nozzle, and a protection gas inflow pipe is arranged on the amplitude-change pole. The base metal beside the molten pool and the weld joint is vibrated, the grains in the weld joint are more refined, the metal tissue is denser, gas in the weld joint is completely precipitated, welding deformation is reduced, the fatigue strength of a welding joint is improved, the fatigue life of the welding joint is prolonged, and welding quality is guaranteed.

Description

technical field [0001] The invention relates to a process and a device for performing plasma arc welding on metal workpieces, belonging to the technical field of plasma arc welding. Background technique [0002] Plasma arc welding is a welding method that uses a plasma arc as a heat source. The gas is heated by the arc to generate dissociation, and is compressed when passing through the water-cooled nozzle at high speed, which increases the energy density and dissociation degree to form a plasma arc. The arc is ignited by the auxiliary electrode at high frequency and burns between the electrode and the workpiece for welding. The plasma arc penetrates or penetrates the sheet to form a weld pool. Its stability, calorific value and temperature are higher than ordinary arc, so it has greater penetration and welding speed. The gas forming the plasma arc and the shielding gas around it are generally argon. According to various materials, helium, argon-helium, argon-hydrogen and...

Claims

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Application Information

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IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 赵辉
Owner 赵辉
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