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Ultrasonic narrow gap welding system and method for aluminum alloys

A welding system and narrow gap technology, applied in the direction of welding equipment, welding accessories, welding rod characteristics, etc., can solve the problems that the welding speed cannot be further improved, weld pores defects, weld structure unevenness, etc., to avoid adverse effects, reduce Porosity, effect of improving process applicability

Active Publication Date: 2022-07-01
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0007] The purpose of the present invention is to propose a method that can achieve uniform weld structure, remove weld seam, etc. A low thermal impact, high-efficiency aluminum alloy narrow-gap welding system and method for seam pores, improved welding speed, and wide application range. By coupling the ultrasonic frequency electrical signal generated by the ultrasonic excitation power supply with the welding electrical signal, the coupling capacitance is controlled. The charging and discharging speed is fast, and the composite welding electrical signal with negligible heat input change and ultrasonic effect can be obtained, which excites the molten pool-ultrasonic resonance, changes the ultrasonic intensity during welding of each layer, and realizes high-efficiency and high-quality thick-walled aluminum alloy narrow gap arc welding

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  • Ultrasonic narrow gap welding system and method for aluminum alloys
  • Ultrasonic narrow gap welding system and method for aluminum alloys
  • Ultrasonic narrow gap welding system and method for aluminum alloys

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with specific embodiments.

[0052] The technical principle of the aluminum alloy ultrasonic narrow gap welding system and method with low thermal influence and high efficiency proposed by the present invention is as follows: the narrow gap arc welding method can be a swinging arc narrow gap, a swing arc narrow gap or a rotating arc narrow gap, using The swing or rotation of the arc preferentially ensures the fusion of the side walls. On this basis, the ultrasonic control method proposed by the present invention is used to improve the problems existing in the traditional narrow-gap arc welding of aluminum alloys. speed and improve the quality of aluminum alloy narrow gap arc welding.

[0053] The ultrasonic excitation power supply is connected to the welding wire of the narrow gap welding torch and the workpiece to be welded through the coupled waveform control system, and the waveform of the...

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Abstract

The invention discloses an ultrasonic narrow gap welding system and method for aluminum alloys. The welding system is composed of an ultrasonic frequency excitation power source, a coupled waveform control system, a welding power source, a narrow gap welding torch and a joint control switch. The welding method is as follows: The joint control switch performs asynchronous and precise control of the welding circuit and the ultrasonic circuit according to the set program; the coupling waveform control system uses the current limiting resistor to control the charging and discharging of the coupling capacitor to realize an ultrasonic frequency coupling electric signal with low thermal influence, thereby avoiding the additional heat of the electric coupling. The adverse effect of input on the grain refinement of the weld; by controlling the ultrasonic excitation frequency to ensure that the molten pool is in resonance during welding of each layer, changing the ultrasonic input energy during welding of different layers, realizing the homogenization of the structure of the narrow gap welding joint, and removing the weld Air holes solve the problem of uneven joint performance. At the same time, the swing angle and sidewall dwell time of the traditional swing arc narrow gap welding are reduced, and the welding efficiency is improved.

Description

technical field [0001] The invention relates to an aluminum alloy ultrasonic narrow gap welding system and method with low thermal influence and high efficiency, and belongs to the technical field of narrow gap arc welding. Background technique [0002] Thick-walled aluminum alloys are widely used in aerospace, shipbuilding, nuclear power and other fields, and their welding quality is directly related to the reliability and service life of related products. Therefore, the welding of thick-walled aluminum alloys deserves attention. As a high-efficiency, high-quality, low-cost welding method, narrow-gap arc welding has a strong competitive advantage in the welding of thick-walled aluminum alloys. Among them, the narrow gap melting electrode welding method has higher welding efficiency than the non-melting electrode welding method. At present, in order to effectively control the occurrence of sidewall fusion defects in narrow gap welding, the existing narrow gap welding techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/095B23K9/28B23K9/32B24B27/033
CPCB23K9/16B23K9/095B23K9/28B23K9/32B24B27/033
Inventor 陈琪昊王加友谢志宇
Owner JIANGSU UNIV OF SCI & TECH
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