CN114346381B - Magnetic control arc control method and device based on multipole sharp-angle magnetic field - Google Patents
Magnetic control arc control method and device based on multipole sharp-angle magnetic field Download PDFInfo
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- CN114346381B CN114346381B CN202210030681.0A CN202210030681A CN114346381B CN 114346381 B CN114346381 B CN 114346381B CN 202210030681 A CN202210030681 A CN 202210030681A CN 114346381 B CN114346381 B CN 114346381B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/08—Arrangements or circuits for magnetic control of the arc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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Abstract
The invention discloses a magnetic control arc control method and a device based on a multipole sharp-angle magnetic field, wherein the device adopted by the method comprises the following steps: the device comprises a coil group consisting of six excitation coils for generating a sharp-angle magnetic field, a control circuit, six excitation power supplies and a magnetic control arc controller; wherein: six excitation coils are symmetrically distributed around the welding gun along the center of the clock direction, and the magnetic adjacent switching is performed; the welding arc generates stretching and compressing effects by non-axisymmetrically distributed special-shaped sharp-angle magnetic fields formed in the welding arc area through the two working modes, so that the stirring effect of the arc on a welding pool and the flow field distribution of the pool are regulated and controlled, and the weld formation and the weld quality are regulated and controlled; the invention can realize the purpose of eliminating humps, undercut and other defects and improve the welding quality.
Description
Technical Field
The invention belongs to the technical field of magnetic control arc welding, and particularly provides a magnetic control arc control method and device based on a multipole sharp-angle magnetic field.
Background
The magnetic control welding technology is to add an external magnetic field in the welding process, and change the shape, temperature distribution, molten pool state and crystallization state of a welding arc through electromagnetic force generated by the external magnetic field, so that the arc energy is more concentrated, and the weld joint formation is improved.
Through years of researches of scholars in various countries, different welding conditions are found to be improved by adding different types of external magnetic fields, so that a good welding effect is achieved. Currently, the externally applied magnetic field is mainly divided into an externally applied transverse magnetic field, an externally applied longitudinal magnetic field and an externally applied sharp angle magnetic field. For example, the external transverse magnetic field can inhibit the inertia force of arc blow and arc tailing, so as to avoid the phenomena of insufficient fusion of a molten pool and hump; the external longitudinal magnetic field can improve the penetration and width of the welding seam, and meanwhile, the grain refinement of the welding seam structure can be realized, so that the quality of the welding seam is improved; the externally-added sharp-angle magnetic field can change the movement track of the electric arc by changing the current of the magnetic field, so that the electric arc is changed into an ellipse from a round shape, and the welding direction can be adjusted according to the requirement, thereby improving the penetrating capacity and the cladding efficiency. Research on magnetic control technology at home and abroad shows that an important factor influencing welding is magnetic field form, namely magnetic pole distribution, sharp-angle magnetic fields are generally designed to be uniformly distributed by taking a welding gun as a center, but the effect is limited, the application place is limited, and the welding requirement at the present stage is difficult to realize.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a magnetic control arc control method and a magnetic control arc control device based on a multipole sharp-angle magnetic field, which can achieve the purposes of eliminating humps, undercut and other defects and improving welding quality.
The invention provides the following scheme:
the method comprises the steps of forming a sharp angle magnetic field by adopting excitation coils with six magnetic pole polarities which are switched adjacently, generating irregularly-distributed irregularly-shaped sharp angle magnetic fields by adjusting the positions and the current of the excitation coils, adjusting the stretching and compression effects of certain directions of a welding arc by adjusting the irregularly-shaped sharp angle magnetic fields, and adjusting the shape factor of an arc welding seam so as to adjust and control the forming and welding seam quality of the arc welding seam; the magnetic control arc control method of the multipole sharp-angle magnetic field has two working modes: the first mode is an alternating mode, and the second mode is a non-alternating mode, and the method concretely comprises the following steps:
operation mode one: the welding direction is along the connecting direction of the midpoint of the connecting line of the first exciting coil (1) and the sixth exciting coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4); taking welding current positive polarity as an example, the specific working process of the mode is as follows: at the time of 0-T/2, the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 1 ＝I 2 ＝0A，The welding arc working area is provided with a special-shaped sharp-corner magnetic field with magnetic pole polarity of 0-0-N-S-N-S, the magnetic field distribution between the third excitation coil (3) and the fourth excitation coil (4) and the magnetic field distribution between the fifth excitation coil (5) and the sixth excitation coil (6) have a stretching effect on the welding arc, the magnetic field distribution between the fourth excitation coil (4) and the fifth excitation coil (5) and the magnetic field distribution between the third excitation coil (3) and the sixth excitation coil (6) have a compression effect on welding current, and the special-shaped sharp-corner magnetic field with the non-axisymmetrical distribution drives the welding arc distribution and the molten pool flow field distribution to be more inclined to the right rear in the welding direction; in the T/2-T process, the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 5 ＝I 6 The welding arc working area is provided with a special-shaped sharp-corner magnetic field with the magnetic pole polarity of N-S-N-S-0-0, the magnetic field distribution between the first exciting coil (1) and the second exciting coil (2) and the magnetic field distribution between the third exciting coil (3) and the fourth exciting coil (4) have a stretching effect on welding current, the magnetic field distribution between the second exciting coil (2) and the third exciting coil (3) and the magnetic field distribution between the first exciting coil (1) and the fourth exciting coil (4) have a compression effect on welding current, and the special-shaped sharp-corner magnetic field with the non-axisymmetrical distribution drives the welding arc distribution and the flow field distribution to be more inclined to the left and the rear of a welding direction; taking T as a time period, alternately changing a first exciting coil (1), a second exciting coil (2), a third exciting coil (3), a fourth exciting coil (4), a fifth exciting coil (5) and a sixth exciting coil (6) according to the mode, and periodically swinging the welding arc laterally and backwardly through the alternately changing, so as to regulate and control the stirring effect of the arc on a welding pool and the flow field distribution of the pool, and further regulate and control the welding seam forming and the quality of the welding seam;
and a second working mode: the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are distributed in a mode that the magnetic pole polarity is N-S-N-S-N-S, and the welding direction is alongThe connecting direction of the midpoint of the connecting line of the first exciting coil (1) and the sixth exciting coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4) is along; taking welding current positive polarity as an example, the specific working process of the mode is as follows: the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Forming special sharp angle magnetic fields with the magnetic pole polarity of N-S-N-S-N-S in a welding arc working area, wherein the special sharp angle magnetic fields drive the welding arc distribution and the distribution of the welding arc in the left rear direction and the right rear direction of the welding direction, the stirring effect and the distribution of a welding pool of the welding weld pool are regulated and controlled by the magnetic field distribution of the special sharp angle magnetic fields between the first excitation coil (1), the second excitation coil (2) and the third excitation coil (2) and the magnetic field distribution between the fourth excitation coil (4) and the fifth excitation coil (5) and the distribution of the welding arc and between the sixth excitation coil (6) and the first excitation coil (1), and the stirring effect and the distribution of the welding pool are regulated and controlled by the double-side rear stretching effect of the special sharp angle magnetic fields between the first excitation coil (1) and the third excitation coil (2) and the third excitation coil (3) and the fourth excitation coil (5) and the sixth excitation coil (6) along the welding direction, so that the welding arc forming and the welding quality are regulated and controlled;
the first excitation power supply (7), the second excitation power supply (8), the third excitation power supply (9), the fourth excitation power supply (10), the fifth excitation power supply (11) and the sixth excitation power supply (12) output specified currents to a coil group consisting of the first excitation coil (1), the second excitation coil (2), the third excitation coil (3), the fourth excitation coil (4), the fifth excitation coil (5) and the sixth excitation coil (6) so as to form a sharp-angle magnetic field, so that compression and stretching effects are generated on certain bit directions of welding arcs;
the magnetic control arc controller (13) can be replaced by a singlechip, a DSP, ARM, FPGA, PLC, an industrial personal computer or a computer;
the magnetic control arc control method is suitable for argon tungsten-arc welding and consumable electrode gas shielded welding;
the magnetic control arc control method can be used for arc motion control of an arc sensor.
Drawings
FIG. 1 is a system block diagram of the present invention;
FIG. 2 is a schematic diagram of the magnetic field distribution at 0-T/2 for the operational mode;
FIG. 3 is a schematic diagram of the magnetic field distribution at T/2-T for the operational mode;
FIG. 4 is a schematic diagram of the principle of action of the magnetic field on the welding arc at 0-T/2 for the operational mode;
FIG. 5 is a schematic diagram of the principle of action of the magnetic field on the welding arc at T/2-T in the operating mode;
FIG. 6 is a schematic diagram of the magnetic field distribution during mode two operation;
FIG. 7 is a schematic diagram of the principle of action of the magnetic field on the welding arc during mode two operation;
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
The structures, proportions, sizes, etc. of the drawings are shown in the specification, and are used for understanding and reading by those skilled in the art, and the invention is not limited to the specific features of the invention, but is not limited to the specific features, changes in structure, proportions, or otherwise, used in the practice of the invention, without departing from the spirit or scope thereof, which is otherwise indicated by the appended claims.
Example 1: the invention relates to a magnetic control arc control method and a device based on a multipole sharp-angle magnetic field, comprising a coil group consisting of six excitation coils for generating the sharp-angle magnetic field, a control circuit, six excitation power supplies and a magnetic control arc controller; wherein: six excitation coils are symmetrically distributed around the welding gun along the center of the clock direction, and the magnetic adjacent switching is performed; the six excitation coils consist of a first excitation coil (1), a second excitation coil (2), a third excitation coil (3), a fourth excitation coil (4), a fifth excitation coil (5) and a sixth excitation coil (6); the six excitation power supplies consist of a first excitation power supply (7), a second excitation power supply (8), a third excitation power supply (9), a fourth excitation power supply (10), a fifth excitation power supply (11) and a sixth excitation power supply (12); the magnetic control arc control method based on the multipole sharp-angle magnetic field has two working modes: the first mode is an alternating mode, and the second mode is a non-alternating mode.
Example 2: the first working mode of the invention adopts the following technical scheme: the welding direction is along the connecting direction of the midpoint of the connecting line of the first exciting coil (1) and the sixth exciting coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4); the magnetic field distribution of the six excitation coils is shown in fig. 2, 3, 4 and 5; wherein, the magnetic field distribution at the time of 0-T/2 is shown in FIG. 2 and FIG. 4, and the magnetic field distribution at the time of T/2-T is shown in FIG. 3 and FIG. 5.
Taking welding current positive polarity as an example, at 0-T/2, I is respectively introduced into a first excitation coil (1), a second excitation coil (2), a third excitation coil (3), a fourth excitation coil (4), a fifth excitation coil (5) and a sixth excitation coil (6) 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 1 ＝I 2 The welding arc working area is provided with a special-shaped sharp-corner magnetic field with magnetic pole polarity of 0-0-N-S-N-S, the magnetic field distribution between the third excitation coil (3) and the fourth excitation coil (4) and the magnetic field distribution between the fifth excitation coil (5) and the sixth excitation coil (6) exert a stretching effect on the welding arc, the magnetic field distribution between the fourth excitation coil (4) and the fifth excitation coil (5) and the magnetic field distribution between the third excitation coil (3) and the sixth excitation coil (6) exert a compression effect on welding current, and the special-shaped sharp-corner magnetic field with the non-axisymmetrical distribution drives the welding arc distribution and the flow field distribution of a molten pool to be more inclined to the right rear in the welding direction;
in the T/2-T process, the first exciting coil (1) and the second exciting coil are arranged2) I is respectively led into the third excitation coil (3), the fourth excitation coil (4), the fifth excitation coil (5) and the sixth excitation coil (6) 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 5 ＝I 6 The welding arc working area is provided with a special-shaped sharp-corner magnetic field with the magnetic pole polarity of N-S-N-S-0-0, the magnetic field distribution between the first exciting coil (1) and the second exciting coil (2) and the magnetic field distribution between the third exciting coil (3) and the fourth exciting coil (4) exert a stretching effect on welding current, and the magnetic field distribution between the second exciting coil (2) and the third exciting coil (3) and the magnetic field distribution between the first exciting coil (1) and the fourth exciting coil (4) exert a compression effect on welding current, and the special-shaped sharp-corner magnetic field with the magnetic pole polarity of N-S-N-0-0 drives the welding arc distribution and the flow field distribution to be more inclined to the left and the rear of a welding direction.
Taking T as a time period, alternately changing a first exciting coil (1), a second exciting coil (2), a third exciting coil (3), a fourth exciting coil (4), a fifth exciting coil (5) and a sixth exciting coil (6) according to the mode, and periodically swinging the welding arc laterally and backwardly through the alternately changing, so as to regulate and control the stirring effect of the arc on a welding pool and the flow field distribution of the pool, and further regulate and control the welding seam forming and the quality of the welding seam;
example 3: the second working mode adopts the technical scheme that: the welding direction is along the connecting direction of the midpoint of the connecting line of the first exciting coil (1) and the sixth exciting coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4); taking welding current positive polarity as an example, the specific working process of the mode is as follows:
the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Excitation of (b)The current and the special sharp-angle magnetic fields with the magnetic pole polarity of N-S-N-S are formed in a welding arc working area, the magnetic field distribution of the six excitation coils is shown as shown in fig. 6 and 7, the magnetic field distribution of the first excitation coil (1), the second excitation coil (2) and the third excitation coil (3), the fourth excitation coil (4) and the fifth excitation coil (5) and the sixth excitation coil (6) has a stretching effect on the welding arc, the magnetic field distribution of the second excitation coil (2), the third excitation coil (3), the fourth excitation coil (4), the fifth excitation coil (5) and the sixth excitation coil (6) and the first excitation coil (1) has a compression effect, and the special sharp-angle magnetic fields drive the welding arc distribution and the flow field distribution to be distributed towards the rear directions of the left rear and the right rear at the same time, the stirring effect and the flow field distribution of the welding arc welding pool are regulated by the special sharp-angle magnetic fields along the bilateral rear stretching effect of the left rear and the right rear of the welding pool in the welding direction, and the welding arc quality of the welding arc is regulated and the welding pool is regulated;
example 4; by adopting the magnetic control arc control method and device based on the multipole sharp-angle magnetic field, the coil group consisting of the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) is subjected to specified current output, so that the coil group forms a special-shaped sharp-angle magnetic field in a welding arc area, and the compression and stretching effects are generated on certain bit directions of welding arc.
Example 5: by adopting the magnetic control arc control method and device based on the multipole sharp-angle magnetic field, the magnetic control arc controller can be replaced by a singlechip, DSP, ARM, FPGA, PLC, an industrial personal computer or a computer;
example 6: the magnetic control arc control method and the device based on the multipole sharp-angle magnetic field are adopted, and the magnetic control arc control method is suitable for argon tungsten-arc welding and consumable electrode gas shielded welding;
example 7: the magnetic control arc control method and the device based on the multipole sharp-angle magnetic field can be used for controlling the arc motion of an arc sensor;
the invention is not a matter of the known technology.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (5)
1. A magnetic control arc control method based on a multipole sharp-angle magnetic field is characterized in that: the device adopted by the method comprises the following steps: the device comprises a coil group consisting of six excitation coils for generating a sharp-angle magnetic field, a control circuit, six excitation power supplies and a magnetic control arc controller; wherein: the six excitation coils are distributed around the welding gun in a central symmetry manner, are magnetically adjacent to each other and are respectively a first excitation coil (1), a second excitation coil (2), a third excitation coil (3), a fourth excitation coil (4), a fifth excitation coil (5) and a sixth excitation coil (6) along the clockwise direction; the magnetic control arc control method based on the multipole sharp-angle magnetic field has two working modes: the first mode is an alternating mode, and the second mode is a non-alternating mode, and the method concretely comprises the following steps:
operation mode one: the welding direction is along the connecting direction of the midpoint of the connecting line of the first exciting coil (1) and the sixth exciting coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4); taking welding current positive polarity as an example, the specific working process of the mode is as follows: at the time of 0-T/2, the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 1 ＝I 2 =0a, and is formed in the welding arc working regionThe magnetic field distribution between the third excitation coil (3) and the fourth excitation coil (4) and between the fifth excitation coil (5) and the sixth excitation coil (6) has a stretching effect on welding arc, the magnetic field distribution between the fourth excitation coil (4) and the fifth excitation coil (5) and between the third excitation coil (3) and the sixth excitation coil (6) has a compression effect on welding current, and the abnormal sharp magnetic field in the non-axisymmetric distribution drives the welding arc distribution and the flow field distribution of a molten pool to be more inclined to the right and the rear in the welding direction; in the T/2-T process, the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 Wherein I is 5 ＝I 6 The welding arc working area is provided with a special-shaped sharp-corner magnetic field with the magnetic pole polarity of N-S-N-S-0-0, the magnetic field distribution between the first exciting coil (1) and the second exciting coil (2) and the magnetic field distribution between the third exciting coil (3) and the fourth exciting coil (4) have a stretching effect on welding current, the magnetic field distribution between the second exciting coil (2) and the third exciting coil (3) and the magnetic field distribution between the first exciting coil (1) and the fourth exciting coil (4) have a compression effect on welding current, and the special-shaped sharp-corner magnetic field with the non-axisymmetrical distribution drives the welding arc distribution and the flow field distribution to be more inclined to the left and the rear of a welding direction; taking T as a time period, alternately changing a first exciting coil (1), a second exciting coil (2), a third exciting coil (3), a fourth exciting coil (4), a fifth exciting coil (5) and a sixth exciting coil (6) according to the mode, generating periodical side-rear swing of a welding arc through the alternately changing, and regulating and controlling the stirring of the welding molten pool and the distribution of a molten pool flow field of the welding arc so as to regulate and control the welding seam forming and the welding seam quality;
and a second working mode: the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are distributed in a mode that the magnetic pole polarity is N-S-N-S-N-S, and the welding direction is along the first exciting coil (1) and the sixth exciting coilThe connecting direction of the midpoint of the connecting line of the coil (6) and the midpoint of the connecting line of the third exciting coil (3) and the fourth exciting coil (4); taking welding current positive polarity as an example, the specific working process of the mode is as follows: the first exciting coil (1), the second exciting coil (2), the third exciting coil (3), the fourth exciting coil (4), the fifth exciting coil (5) and the sixth exciting coil (6) are respectively connected with I 1 、-I 2 、I 3 、-I 4 、I 5 、-I 6 And forming a special sharp angle magnetic field with the magnetic pole polarity of N-S-N-S in a welding arc working area, wherein the special sharp angle magnetic field drives the welding arc distribution and the special sharp angle magnetic field to be distributed towards the left rear and the right rear of the welding direction, the magnetic field distribution between the first exciting coil (1) and the second exciting coil (2) and the third exciting coil (3) and the magnetic field distribution between the fourth exciting coil (5) and the sixth exciting coil (6) and the magnetic field distribution between the second exciting coil (2) and the third exciting coil (3) and the magnetic field distribution between the fourth exciting coil (4) and the fifth exciting coil (5) and the magnetic field distribution between the sixth exciting coil (6) and the first exciting coil (1) has a stretching effect on the welding arc, and the stirring effect and the distribution of a welding pool of the welding arc pool are regulated and controlled by the special sharp angle magnetic field distribution towards the left rear and the right rear of the welding direction along the double-side rear of the welding direction, so as to regulate the welding arc flow field distribution and the welding weld seam quality.
2. The method for controlling a magnetic arc based on a multipole cusp magnetic field according to claim 1, wherein: the six excitation power supplies output specified current to a coil assembly formed by the six excitation coils, so that the coil assembly forms a special-shaped sharp-angle magnetic field, and the welding arc has compression and stretching effects on certain positions.
3. The method for controlling a magnetic arc based on a multipole cusp magnetic field according to claim 1, wherein: the magnetic control arc controller can be replaced by a singlechip, DSP, ARM, FPGA, PLC, an industrial personal computer or a computer.
4. The method for controlling a magnetic arc based on a multipole cusp magnetic field according to claim 1, wherein: the magnetic control arc control method is suitable for argon tungsten-arc welding and gas metal arc welding.
5. The method for controlling a magnetic arc based on a multipole cusp magnetic field according to claim 1, wherein: the magnetic control arc control method can be used for arc motion control of an arc sensor.
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| CN1872479A (en) * | 2006-06-30 | 2006-12-06 | 北京工业大学 | Generation device of rotating magnetic field in use for controlling welding arc |
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