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The method of overcoming the magnetic deflection of the magnetic field to the welding arc

A technology of magnetic deflection blowing and arcing, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc. It can solve the problems of transitional influence, inability to weld, maintenance, overhaul welding difficulties, etc., to achieve uniform current, overcome the magnetic field to the welding arc The role and influence of the magnetic deflection blow phenomenon

Inactive Publication Date: 2018-03-20
PANGANG GRP ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These magnetic fields will have a certain magnetic deflection, which will have a serious impact on the welding material and arc droplet transfer during arc welding. Commonly used arc welding methods cannot be welded, which brings difficulties to maintenance and repair welding in the workshop.

Method used

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  • The method of overcoming the magnetic deflection of the magnetic field to the welding arc
  • The method of overcoming the magnetic deflection of the magnetic field to the welding arc
  • The method of overcoming the magnetic deflection of the magnetic field to the welding arc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Adopt the method for overcoming the magnetic field of the present invention to welding arc magnetic deflection, carry out the arc welding of magnetic material in the magnetic field environment; Its specific implementation steps comprise the following steps:

[0052] 1. Select the electrode with cellulose coating 4; use a DC welding machine with a no-load voltage greater than 70V and a thrust function 1.

[0053] 2. On both sides of one end of the weld 31 on the welded part 3, weldment connection points are set; and the weldment connection points on both sides of the weld 31 are symmetrical with respect to the center line of the weld 31; The distance d1 between the welding seams is 200-300 mm; connect the weldment junction point to the positive terminal 12 of the DC motor through wires; connect the welding tongs 2 to the negative terminal 11 of the DC welding machine 1 .

[0054] 3. Set the thrust current to the upper limit of the thrust current range of DC welding machi...

Embodiment 2

[0058] Example 2, Example 3, Comparative Example 1 and Comparative Example 2 all adopt the method in Example 1, change the no-load voltage of the DC welding machine and the operating frequency of interrupted arc welding, the specific parameters changed and the corresponding technical effects, See Table 1;

[0059] Table 1

[0060]

[0061] Note: Magnetic blowout refers to the phenomenon that the arc deviates from the axis of the electrode; it is generally verified during test welding. Because it is impossible to measure the distance from the arc to the axis of the electrode, it is generally observed with the naked eye whether the arc deviates from the axis of the electrode to determine whether there is a magnetic blow. The success rate refers to the percentage of qualified products obtained by welding and all welded products.

[0062] As can be seen from the above table, the method for welding operation in the magnetic field environment of the present invention; when the ...

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PUM

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Abstract

The invention discloses a method capable of preventing electric arc from generating magnetic deflective blow and overcoming magnetic deflective blow of magnetic fields on the welding electric arc and belongs to the technical field of welding production in the magnetic fields. The method for overcoming the magnetic deflective blow of the magnetic fields on the welding electric arc comprises following steps: 1), a welding rod with a cellulose coating is selected; a DC (direct current) welder with non-load voltage higher than 70 V and a thrusting function is adopted; 2), weldment wiring points connected with an anode terminal of the DC welder are arranged on two sides of a weld joint of a welded piece, and welding tongs are connected with a cathode of the DC welder; 3), an upper limit value of a thrust current range of the DC welder is selected as thrust current; 4), the welding electric arc is subjected to short circuit contact, broken arc welding is adopted for electrode manipulation operation, and the operating frequency of the broken arc welding is controlled to be 40-50 times / min. With the adoption of the method for overcoming the magnetic deflective blow of the magnetic fields on the welding electric arc, effects and influence of electrolytic bath in the chemical industry and the magnetic fields produced around the electrolytic bath on the welding electric arc can be overcome, the magnetic deflective blow to the welding electric arc is weakened, and smooth welding is guaranteed.

Description

technical field [0001] The invention relates to the technical field of welding production in an electrolytic cell of chemical equipment and surrounding magnetic fields, in particular to a method for overcoming the magnetic deflection of a welding arc by a magnetic field. Background technique [0002] It is known that the existing welding technology performs welding in a magnetic field environment, and generally adopts the following welding technology: [0003] 1. Generally, alternating current welding is used, because the changing magnetic field generates an induced current in the conductor, and the magnetic field generated by the induced current weakens the magnetic field caused by the welding current, thereby controlling a certain magnetic deflection. [0004] 2. Generally, the measures to prevent magnetic blowing are mainly: ①Reduce the residual magnetism on the weldment, and use the method of local heating on the weldment to reduce the residual magnetism around the weld ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/08
CPCB23K9/08
Inventor 朱宁何耀飞吴荣善鲁晓欣
Owner PANGANG GRP ENG TECH