CN108994427B - Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device - Google Patents
Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device Download PDFInfo
- Publication number
- CN108994427B CN108994427B CN201811057043.8A CN201811057043A CN108994427B CN 108994427 B CN108994427 B CN 108994427B CN 201811057043 A CN201811057043 A CN 201811057043A CN 108994427 B CN108994427 B CN 108994427B
- Authority
- CN
- China
- Prior art keywords
- welding
- magnetic field
- magnetic
- direct current
- welded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention relates to a direct current welding arc magnetic blow control method utilizing an external magnetic field expansion device, which is characterized in that the magnetic field expansion devices are arranged on two sides of a weldment which is assembled and positioned, and the anode and the cathode of the output end of a direct current welding machine are respectively connected with a welding rod and the magnetic field expansion devices, so that a magnetic field formed by welding current is positioned at the periphery of a welding seam in the welding process, electromagnetic field interference is not formed on electric arcs in an arc starting section and an arc extinguishing section area of the welding seam, and the welding quality defect generated by arc magnetic blow can be eliminated.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a direct current welding arc magnetic blow control method by using an external magnetic field expanding device.
Background
As is known, in the dc welding process, the inherent welding magnetic field may cause the welding arc in the arc starting section and the arc quenching section to be affected by magnetic blow during the welding process of the welding seam, thereby adversely affecting the welding quality. The existing method for controlling the magnetic blow of the welding arc mainly adopts the following methods and measures:
1. generally, alternating current welding is adopted, the influence of magnetic blow on a welding seam can be obviously reduced by using an alternating current power supply, eddy current can be generated by high-speed alternating current, and the magnetic field intensity causing the magnetic blow is greatly weakened by the magnetic field generated by the eddy current.
2. Double-wire welding is adopted, a direct current power supply and an alternating current power supply are adopted, a magnetic field generated by high-speed alternating causes eddy current loss in a parent metal, and the effect of small magnetic field intensity is generated.
3. A Scott natural phase-changing method is adopted, two alternating current power supplies are adopted for double-wire welding, and when the phase difference between the two power supplies is 80-90 degrees, the influence of magnetic blow can be reduced.
The above list is the main measures generally taken for automatic welding, and certain effects can be generally obtained, and the following methods are generally adopted in manual arc welding operation:
adopting smaller current;
secondly, the position of the grounding wire is changed to adjust the uniform distribution of the magnetic force lines;
thirdly, the influence of magnetic blow is reduced by adjusting the welding dip angle of the welding rod;
placing ferromagnetic materials of a symmetrical magnetic field to ensure that ferromagnetic substances around the electric arc are uniformly distributed;
fifthly, reducing residual magnetism on the workpiece, and heating by using a local heating method for control;
and sixthly, overcoming the influence of the magnetic field on magnetic blow by using an anti-demagnetization method.
The above methods, some patented technologies for controlling the spattering rate by an external magnetic field and various researches for overcoming the influence of magnetic blow on the welding arc of manual electric arc welding at home and abroad are generally inflexible and convenient to operate, and the effect is not in an ideal state. The magnetic flux shield is not easy to apply in actual operation, the distribution of magnetic force lines in magnetic blow cannot be effectively expanded, the effect of arc magnetic blow is overcome, the effect is good and bad, the effect is unstable, and a welding arc magnetic field cannot be uniformly distributed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a direct current welding arc magnetic blow control method by utilizing an external magnetic field expanding device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for controlling the magnetic blow of the direct current welding arc by using the external magnetic field expanding device is characterized in that: the method adopts an external magnetic field expanding device to completely place a welded seam in a magnetic field blank area formed by welding current, the welding quality of the welded seam is not influenced by the magnetic field formed by the welding current, and the method comprises the following specific steps:
step 3, mounting magnetic field expansion devices on two sides of the weldment which is assembled and positioned, wherein the magnetic field expansion devices are perpendicular to the weld joint;
step 4, connecting the positive electrode and the negative electrode of the output end of the direct current welding machine with the welding rod and the magnetic field expansion device respectively;
step 5, adjusting technological parameters of welding current;
step 6, performing priming welding on the welding seam after assembly and positioning;
step 7, welding a filling layer on the welding seam after assembly and positioning;
and 8, performing covering layer welding on the welding seam after assembly and positioning.
The magnetic field enlarging device comprises a magnetic conduction piece, the magnetic conduction piece is in a rectangular plate shape, and clamping pieces are fixedly arranged at two ends of the side wall of the magnetic conduction piece.
The clamp adopts a fastening bolt to fixedly connect the steel plate to be welded with the magnetic conduction member, the joint of the clamp and the steel plate to be welded is positioned at one side edge of the steel plate to be welded, which is far away from a welding seam, the negative pole of the output end of the direct current welding machine is respectively connected with the magnetic conduction members of the two magnetic field expansion devices, and the joint of the negative pole of the output end of the direct current welding machine and the magnetic conduction member is positioned at the central position of the magnetic conduction member, which is far away from one side edge of the.
The welding modes adopted in the steps 6-8 comprise horizontal welding, vertical welding, transverse welding and overhead welding.
The thickness range of the steel plate to be welded is 1-16 mm, and the gradient range of the V-shaped groove welding line is 25-45 degrees.
An external magnetic field in the welding process of direct current welding enlarges device which characterized in that: including magnetic conduction spare and folder, the magnetic conduction spare be rectangular plate-like, the equal fixed mounting in lateral wall both ends of magnetic conduction spare one side has the folder, the folder include U type card and fixing bolt, the fastening of U type card is treating the welded steel board through fixing bolt, the magnetic conduction spare keep away from the side edge of folder one side and be provided with the power connection end, the output of power connection end and electric welding be connected.
The power supply connecting end is arranged at the central position of the edge of the side edge of the magnetic conduction piece, the clamping piece is made of magnetic conduction and electric conduction materials, and the magnetic conduction piece is detachably connected with the steel plate to be welded through the clamping piece.
The method for controlling the magnetic blow of the direct current welding arc by using the external magnetic field expanding device has the beneficial effects that: can effectual solution electric arc magnetic blow to the influence of direct current welding seam arc starting section and arc extinguishing section, enlarge the device through setting up plus magnetic field, change the route of welding in-process electric current, and then changed the inherent magnetic field that welding current formed, increase behind the magnetic field enlargement device, the regional welding seam of welding of executing and welding does not have the intersection with the peripheral magnetic induction line in magnetic field, at this moment, the arc starting section and the arc extinguishing section and the whole welding seam section of welding seam of executing and welding all can not influenced by magnetic field and then eliminated electric arc magnetic blow side effect.
Drawings
FIG. 1 is a structural diagram of a DC welding arc magnetic blow control device using an external magnetic field expanding device according to the present invention.
FIG. 2 is a structural diagram of a magnetic field expanding device of a DC welding arc magnetic blow control device using an external magnetic field expanding device.
Fig. 3 is a schematic view of the magnetic induction lines of the magnetic field when the welding part of the magnetic field expansion device is welded.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 3, the welding seam both ends are the arc starting section and the arc extinguishing section of welding seam respectively in the picture, adopt traditional welding mode, the inherent magnetic field that the electric current formed during welding can form the interference to the arc starting section and the arc extinguishing section of welding seam, the magnetic induction line in magnetic field can be passed to the welding seam tip promptly, be in the magnetic field, this kind of magnetic field can cause welding arc to produce the magnetic blow phenomenon of different degrees, can lead to welding arc extremely unstable, the inside X-ray image of beating of welding has serious quality defect, make this region can't obtain effectual quality assurance. Therefore, a novel welding process is needed to ensure that the whole welding line is not positioned in the magnetic field.
As shown in fig. 1, the method for controlling the magnetic blow of the direct current welding arc by using the external magnetic field expanding device is characterized in that: the method is characterized in that an external magnetic field expanding device is adopted to completely place the welding seam 4 in a magnetic field formed by welding current, the welding seam is not influenced by the magnetic field formed by the welding current, and the method comprises the following specific steps:
step 3, mounting magnetic field expansion devices on two sides of the weldment which is assembled and positioned, wherein the magnetic field expansion devices are perpendicular to the weld joint;
step 4, connecting the positive electrode of the output end of the direct current welding machine 1 with a welding rod, and respectively connecting the negative electrode with a magnetic field expansion device;
step 5, adjusting technological parameters of welding current;
step 6, performing priming welding on the welding seam after assembly and positioning;
step 7, welding a filling layer on the welding seam after assembly and positioning;
and 8, performing covering layer welding on the welding seam after assembly and positioning.
In this embodiment, the positive electrode of the output end of the dc welding machine 1 is connected to the welding rod 3 through the conductive wire 2, and the negative electrode of the output end of the dc welding machine 1 is connected to the magnetic field enlarging device 5 through the conductive wire 2. In addition, the cathode of the output end of the direct current welding machine 1 can be connected with the welding rod 3 through the conducting wire 2, and the anode of the output end of the direct current welding machine 1 can be connected with the magnetic field expanding device 5 through the conducting wire 2.
In this embodiment, the magnetic field enlarging apparatus includes a magnetic conducting member, the magnetic conducting member is rectangular plate-shaped, and clamping members are fixedly mounted at both ends of a side wall of the magnetic conducting member.
In this embodiment, the clamp fixedly connects the steel plate to be welded to the magnetic conductive member by using a fastening bolt, the connection position of the clamp and the steel plate to be welded is located at one side edge of the steel plate to be welded, which is far away from the weld joint, the negative electrode of the output end of the dc welding machine 1 is respectively connected to the magnetic conductive members of the two magnetic field expansion devices, and the connection position of the negative electrode of the output end of the dc welding machine 1 and the magnetic conductive member is located at the central position of the magnetic conductive member, which is far away from one side.
This kind of structure is at the welding process, and the flow direction of electric current can change to the periphery, and then has enlarged the influence range that the electric current formed magnetic field, makes whole welding seam fall into the inside in magnetic field influence area and does not have the magnetic field region, and whole welding seam includes the arc starting section and the arc extinguishing section of welding seam and all can not influenced by magnetic field, has guaranteed the welding seam quality.
The output end of the direct current welding machine 1 is connected with the center of the side edge of the side, far away from the clamping piece, of the magnetic conduction piece, the distance between two end points of the ellipsoidal magnetic induction line is longer, the connection position of the output end of the welding machine 1 and the magnetic conduction piece and a welding line are located on the same straight line as far as possible during use, the welding line can be effectively placed in a magnetic field-free area, and the welding line is guaranteed not to be interfered by the magnetic field.
In this embodiment, the welding modes adopted in steps 6 to 8 include, but are not limited to, horizontal welding, vertical welding, horizontal welding and overhead welding, including all welding spatial positions.
The thickness range of the steel plate to be welded is 1-16 mm, the gradient range of the V-shaped groove weld is 25-45 degrees, and the gradient of the preferred V-shaped groove weld is 32 degrees.
In this example, the size of a single piece of steel plate to be welded is 300 × 150 mm.
As shown in fig. 2, an external magnetic field expanding device in a dc welding process is characterized in that: including magnetic conduction piece 6 and folder 7, the magnetic conduction piece be rectangular plate-like, the equal fixed mounting in lateral wall both ends of magnetic conduction piece one side has the folder, the folder include U type card and fixing bolt, the fastening of U type card is on treating the welded steel board through fixing bolt, the magnetic conduction piece keep away from the side edge of folder one side and be provided with the power connection end, the output of power connection end and electric welding 1 be connected.
The power supply connecting end is arranged at the central position of the edge of the side edge of the magnetic conduction piece, the clamping piece is made of magnetic conduction and electric conduction materials, and the magnetic conduction piece is detachably connected with the steel plate to be welded through the clamping piece.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (3)
1. A direct current welding arc magnetic blow control method utilizing an external magnetic field expanding device is characterized in that: the method adopts an external magnetic field expanding device to completely place a welded seam in a magnetic field blank area formed by welding current, the welding quality of the welded seam is not influenced by the magnetic field formed by the welding current, and the method comprises the following specific steps:
step 1, adopting a direct current welding machine as a welding machine, and adopting an acid welding rod or an alkaline welding rod as a welding rod;
step 2, assembling the two steel plate assemblies to be welded with each other, wherein the two steel plate assemblies to be welded are assembled and positioned in a V-shaped groove form;
step 3, mounting magnetic field expansion devices on two sides of the weldment which is assembled and positioned, wherein the magnetic field expansion devices are perpendicular to the weld joint;
step 4, connecting the positive electrode and the negative electrode of the output end of the direct current welding machine with the welding rod and the magnetic field expansion device respectively;
step 5, adjusting technological parameters of welding current during welding;
step 6, performing priming welding on the welding seam after assembly and positioning;
step 7, welding a filling layer on the welding seam after assembly and positioning;
step 8, performing covering layer welding on the welding seam after assembly and positioning;
the magnetic field expanding device comprises a magnetic conduction piece, the magnetic conduction piece is in a rectangular plate shape, and clamping pieces are fixedly arranged at two ends of the side wall of the magnetic conduction piece;
the magnetic field expansion device comprises a clamping piece, a magnetic field expansion device, a magnetic conduction device and a fixing bolt, wherein the clamping piece is used for fixedly connecting a steel plate to be welded with the magnetic conduction device through the fixing bolt, the joint of the clamping piece and the steel plate to be welded is located at one side edge of the steel plate to be welded, which is far away from a welding line, the negative pole of the output end of a direct current welding machine is respectively connected with the magnetic conduction devices of the two magnetic field expansion devices, the joint of the negative pole of the output end of.
2. The method for controlling the magnetic blow of the welding arc of the direct current welding by using the externally-applied magnetic field expanding device as claimed in claim 1, wherein: the welding modes adopted in the steps 6-8 comprise horizontal welding, vertical welding, transverse welding and overhead welding.
3. The method for controlling the magnetic blow of the welding arc of the direct current welding by using the externally-applied magnetic field expanding device as claimed in claim 1, wherein: the thickness range of the steel plate to be welded is 1-16 mm, and the gradient range of the V-shaped groove welding line is 25-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057043.8A CN108994427B (en) | 2018-09-11 | 2018-09-11 | Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057043.8A CN108994427B (en) | 2018-09-11 | 2018-09-11 | Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108994427A CN108994427A (en) | 2018-12-14 |
| CN108994427B true CN108994427B (en) | 2021-03-09 |
Family
ID=64590936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811057043.8A Active CN108994427B (en) | 2018-09-11 | 2018-09-11 | Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108994427B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505561A (en) * | 2022-02-24 | 2022-05-17 | 华智焊测高科(苏州)有限公司 | Method and device for correcting electric arc piercing welding magnetic blow by external magnetic field |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU662290A1 (en) * | 1971-06-06 | 1979-05-15 | Дальневосточный Ордена Трудового Красного Знамени Политехнический Институт Им. В.В.Куйбышева | Magnetic blast eliminating method |
| JPS53114750A (en) * | 1976-05-24 | 1978-10-06 | Hitachi Ltd | Arc welding method |
| JPS59107772A (en) * | 1982-12-13 | 1984-06-22 | Mitsubishi Heavy Ind Ltd | Method for preventing magnetic blow of welding arc |
| CN1189281C (en) * | 2003-01-21 | 2005-02-16 | 渤海船舶重工有限责任公司 | Technique for eliminating magnetic blow of electric arc of austenitic electrode by using permanent magnet |
| CN102019492B (en) * | 2010-11-18 | 2012-11-21 | 中石化第十建设有限公司 | Demagnetizing and deflective blow preventing device of pipeline welding line |
| CN106312252B (en) * | 2016-10-25 | 2018-03-20 | 攀钢集团工程技术有限公司 | Overcome method of the magnetic field to arc magnetic blow |
| CN108080773A (en) * | 2016-11-23 | 2018-05-29 | 中国石油天然气股份有限公司 | A kind of all positon ultra-narrow gap high frequency heated filament TIG weld method of multiple tube |
-
2018
- 2018-09-11 CN CN201811057043.8A patent/CN108994427B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108994427A (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0832710B1 (en) | Welding method in the overhead and vertical positions | |
| EP0844039B1 (en) | Horizontal welding method and welding equipment | |
| CA2695523C (en) | Improved method of welding two sides of a joint simultaneously | |
| CN105127552B (en) | A kind of pulse current auxiliary welding device and welding method | |
| CN107584195B (en) | Alternating electric arc fuse argon tungsten-arc welding system and method for aluminum alloy piping welding | |
| CN102848085A (en) | Laser-single power double-wire pulse arc hybrid welding system and use method for same | |
| CN101590572A (en) | The vertical double-sided double-arc plasma symmetry welding method | |
| EP3342523B1 (en) | Welding methods and arc welding device | |
| CN110405326B (en) | TIG excitation welding gun for deep and narrow gap and welding method | |
| CN108994427B (en) | Direct current welding arc magnetic blow control method utilizing external magnetic field expansion device | |
| CN110497065B (en) | Variable-polarity three-wire gas-shielded indirect arc welding method and device and application thereof | |
| CN113102891B (en) | Method and device for inhibiting aluminum alloy laser-MIG (Metal-inert gas) composite welding collapse by external magnetic field | |
| CN107570874A (en) | Laser-arc hybrid welding process | |
| CN104475977A (en) | IC (Integrated Circuit) equipment ultra-large aluminum alloy cavity welding method | |
| CN210475817U (en) | TIG excitation welding gun for deep and narrow gap | |
| CN114505561A (en) | Method and device for correcting electric arc piercing welding magnetic blow by external magnetic field | |
| CN110722250B (en) | Method for welding metal parts | |
| CN106583887B (en) | Crack resistence method is welded in magnetic screen in a kind of power transformer tank | |
| Saraev et al. | The development and practical application of adaptive pulse-arc welding in the manufacturing and repair of metal structures responsible function | |
| CN108213658B (en) | Backing welding method | |
| CN110293281A (en) | A kind of narrow gap welding method swinging TIG auxiliary MIG/MAG | |
| CN109262120A (en) | A kind of plasma arc welding (PAW) method and device of not preheated weld thin plate tin bronze | |
| US3291961A (en) | Means and methods for arc welding with a non-consumable rod electrode | |
| CN111001937B (en) | Laser-arc hybrid welding method for circumferential weld of oil and gas long-distance pipeline | |
| CN209867639U (en) | T-shaped welding structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |