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Rotary magnetic field generating device for welding and working method thereof

A technology of generating device and rotating magnetic field, applied in welding accessories and other directions, can solve the problems of unsatisfactory welding quality, component segregation, uneven heat distribution, etc., to improve heat distribution, increase component subcooling, and structural layout. reasonable effect

Active Publication Date: 2015-08-05
SHANGHAI UNIV OF ENG SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the rotating magnetic field generated by the existing technology is not uniform, resulting in uneven heat distribution, and obvious composition segregation will still appear in the fusion zone at the boundary of the weld, and the welding quality cannot meet the requirements

Method used

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  • Rotary magnetic field generating device for welding and working method thereof
  • Rotary magnetic field generating device for welding and working method thereof
  • Rotary magnetic field generating device for welding and working method thereof

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Embodiment Construction

[0018] see Figure 1-Figure 4 , to make a circular platform-shaped barrel wall of appropriate size, with no bottom up and down, and the small bottom facing down, and four appropriate wide brackets are left at the cross-symmetrical positions of the center of the bottom to fix the excitation coil. The four coils are of the same height, and the central axis is facing the center of the circle, and they are divided into two groups with two facing each other as a group. Two symmetrical brackets are installed on the upper part of the big end of the barrel wall, and the center part of the middle circle is used to fix it on the welding torch. The above two groups of coils are respectively connected to the excitation power supply through a waveform shifter, and adjusted so that the two groups of coils are respectively connected to synchronous sine alternating current and cosine alternating current. After electrification, a magnetic field parallel to the coil axis is generated in the mi...

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Abstract

The invention relates to a rotary magnetic field generating device for welding. The rotary magnetic field generating device comprises a coil support (2). A welding gun fixing clip (7) is fixedly arranged in the center of the coil support through a welding gun fixing bracket (6); and a welding gun (1) is installed on the welding gun fixing clip (7). Two groups of coils in the same height are fixedly arranged on the coil support (2), and the two groups of coils are spaced by 90 degrees. The two groups of coils are respectively connected with an excitation power supply through a waveform positioner; the two groups of coils are adjusted and are respectively connected with a synchronous sine alternating current and a synchronous cosine alternating current. A phase difference between the sine alternating current the cosine alternating current is 90 degrees. After being electrified, a magnetic field parallel to a coil axis is generated in the middle of each group of coils; and the magnetic field also changes in sine and cosine along with the changes of the electric current. The magnitude of the magnetic field is unchanged during a circling motion along the magnetic field direction, and accordingly a welding arc is also in the circling motion along with the magnetic field. When the welding gun moves forward, the electric arc moves forward spirally to finish the welding.

Description

technical field [0001] The invention relates to a welding magnetic field generating device, specifically an excitation device, which generates a continuous transverse rotating magnetic field and utilizes the rotating motion of the arc in the magnetic field to adjust the shape of the welding arc to complete welding. Background technique [0002] Welding technology is one of the key technologies in the machinery manufacturing industry. During the solidification process of the molten pool, at the melting boundary of the weld, due to the large temperature gradient and the small crystallization rate, the supercooling of the composition is close to zero, so the plane crystal is developed. As the principle of melting boundary transitions to the center of the weld, the temperature gradient gradually decreases, while the crystallization rate increases, so the crystallization morphology gradually develops to equiaxed crystals. Due to the rapid solidification speed of the molten pool,...

Claims

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Application Information

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IPC IPC(8): B23K9/32
CPCB23K9/32
Inventor 贾涵浩马春伟韩宁谭艳艳
Owner SHANGHAI UNIV OF ENG SCI
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