CN104625365A - Method for overcoming reelpipe longitudinal weld welding magnetic field - Google Patents
Method for overcoming reelpipe longitudinal weld welding magnetic field Download PDFInfo
- Publication number
- CN104625365A CN104625365A CN201510004222.5A CN201510004222A CN104625365A CN 104625365 A CN104625365 A CN 104625365A CN 201510004222 A CN201510004222 A CN 201510004222A CN 104625365 A CN104625365 A CN 104625365A
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- pipe crimping
- longitudinal seam
- reelpipe
- welding
- 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.)
- Pending
Links
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
- B23K9/32—Accessories
Abstract
The invention discloses a method for overcoming a reelpipe longitudinal weld welding magnetic field. Four cables with the same diameter are included, the ends of one sides of the four cables with the same diameter are connected with the negative electrode of a power source, and the ends of the other sides of the four cables with the same diameter are clamped at the two ends of a reelpipe through cable clamping heads. Each end of the reelpipe clamps the two corresponding cable clamping heads. A plurality of permanent magnets are attracted to the two sides of a reelpipe longitudinal weld, and a teslameter measures the practical magnetic field value of the reelpipe longitudinal weld through a feeler probe. According to the method, the magnetic field value of a root pass of the reelpipe longitudinal weld is greatly reduced, real-time monitoring is achieved, the welding efficiency and the weld quality are effectively improved, and the high quality of products is ensured.
Description
Technical field
The present invention relates to a kind of method overcoming pipe crimping longitudinal seam welding magnetic field.
Background technology
The exploitation of marine resources becomes the important directions of national strategy development just day by day, and the construction of multilayer ocean engineering module must be unable to do without the support of structural carbon steel pipe, TMCP(thermomechanical control panel) usually apply as the mother metal of structural carbon steel pipe crimping.Want the secure support realizing structural carbon steel pipe crimping, aobvious particularly important of the height of pipe crimping longitudinal seam bond strength.Due to efficient, stable, the automation of submerged-arc welding, the mode of submerged-arc welding is usually adopted to realize this type of longitudinal seam.In enterprise practical production process, a lot of automatic submerged arc welding machine adopts the direct current source of welding current, now, for this type of TMCP(thermomechanical control panel) backing run of pipe crimping longitudinal seam, due in this region, sectional area sharply reduces, and current density increases, and produces a large amount of induced field, the shaping extreme difference of root pass, even there is the state that cannot weld time serious, overcome welding magnetic field to the impact of longitudinal seam root pass, be related to the end product quality of whole multilayer engineering module.
Therefore, be badly in need of a kind of improvement opportunity and solve this problem existing in prior art.
Summary of the invention
The object of the present invention is to provide a kind of method overcoming pipe crimping longitudinal seam welding magnetic field of effective raising welding efficiency and weldquality.
Technical solution of the present invention is:
Overcome the method in pipe crimping longitudinal seam welding magnetic field, it is characterized in that: comprise four with footpath cable, four negative poles with termination, cable side, footpath connecting welding power supply; Opposite side termination cable clip head-clamp is held in the two ends of pipe crimping, and the often end of pipe crimping clamps two welding connectors; Some permanent magnet adsorbings are in pipe crimping longitudinal seam both sides; Tesla meter measures the size of the true field value of pipe crimping longitudinal seam by feeler probe.
When longitudinal seam starts to weld, a closed power circuit is connected to form in the corresponding corner of pipe crimping with the source of welding current with footpath cable clamping by four, for ensureing that erasure effect is again by the both sides of the permanent magnet adsorbing of some at longitudinal seam, and the change of magnetic field value is monitored constantly by Tesla meter digital display screen, as occurred, the abnormality of magnetic field value increases, and switches the pole orientation of permanent magnet.
The present invention significantly reduces the magnetic field value of pipe crimping longitudinal seam root pass, and accomplishes real-time monitoring, and effective raising welding efficiency and weldquality, ensure the high-quality of product.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the schematic diagram of one embodiment of the invention.
Detailed description of the invention
Overcome the method in pipe crimping longitudinal seam welding magnetic field, comprise four with the negative pole of 1, four, footpath cable with termination, cable side, footpath connecting welding power supply 2; Opposite side termination welding connector 3 is clamped in the two ends of pipe crimping 4, and the often end of pipe crimping clamps two welding connectors; Some permanent magnets 5 are adsorbed on pipe crimping longitudinal seam both sides; Tesla meter (permagnag) 6 measures the size of the true field value of pipe crimping longitudinal seam by feeler probe, the digital display screen of Tesla meter is clear can be found out, the magnetic field value of pipe crimping longitudinal measure root pass significantly decreases, and accomplish real-time monitoring, effective raising welding efficiency and weldquality.Welding gun 7 is also had in figure.
During welding, a closed power circuit is connected to form in the corresponding corner of pipe crimping with the source of welding current with footpath cable clamping by four, for ensureing that erasure effect is again by the both sides of the permanent magnet adsorbing of some at longitudinal seam, and the change of magnetic field value is monitored constantly by Tesla meter digital display screen, as occurred, the abnormality of magnetic field value increases, switch the pole orientation of permanent magnet, ensure optimum erasure effect.
Claims (2)
1. overcome the method in pipe crimping longitudinal seam welding magnetic field, it is characterized in that: comprise four with footpath cable, four negative poles with termination, cable side, footpath connecting welding power supply; Opposite side termination cable clip head-clamp is held in the two ends of pipe crimping, and the often end of pipe crimping clamps two welding connectors; Some permanent magnet adsorbings are in pipe crimping longitudinal seam both sides; Tesla meter measures the size of the true field value of pipe crimping longitudinal seam by feeler probe.
2. the method overcoming pipe crimping longitudinal seam welding magnetic field according to claim 1, it is characterized in that: when longitudinal seam starts to weld, a closed power circuit is connected to form in the corresponding corner of pipe crimping with the source of welding current with footpath cable clamping by four, for ensureing that erasure effect is again by the both sides of the permanent magnet adsorbing of some at longitudinal seam, and the change of magnetic field value is monitored constantly by Tesla meter digital display screen, as occurred, the abnormality of magnetic field value increases, and switches the pole orientation of permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510004222.5A CN104625365A (en) | 2015-01-06 | 2015-01-06 | Method for overcoming reelpipe longitudinal weld welding magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510004222.5A CN104625365A (en) | 2015-01-06 | 2015-01-06 | Method for overcoming reelpipe longitudinal weld welding magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104625365A true CN104625365A (en) | 2015-05-20 |
Family
ID=53204850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510004222.5A Pending CN104625365A (en) | 2015-01-06 | 2015-01-06 | Method for overcoming reelpipe longitudinal weld welding magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104625365A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122670A (en) * | 1980-02-29 | 1981-09-26 | Nippon Steel Corp | Direct current welding method of inner surface of pipe |
| JP2003200267A (en) * | 2001-12-27 | 2003-07-15 | Ohbayashi Corp | Welding cable, welding equipment, and method of welding |
| CN101838927A (en) * | 2010-05-21 | 2010-09-22 | 中纺标(北京)检验认证中心有限公司 | Testing device and method for magnetic induction intensity of textile surfaces |
| CN202133535U (en) * | 2011-04-22 | 2012-02-01 | 襄樊五二五泵业有限公司 | Magnetic leakage coefficient detection apparatus for magnetic shaft coupler |
| CN204035823U (en) * | 2014-07-25 | 2014-12-24 | 中国石油天然气股份有限公司 | A kind of pipeline chain type magnetic conduction instrument optimizing demagnetization |
-
2015
- 2015-01-06 CN CN201510004222.5A patent/CN104625365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122670A (en) * | 1980-02-29 | 1981-09-26 | Nippon Steel Corp | Direct current welding method of inner surface of pipe |
| JP2003200267A (en) * | 2001-12-27 | 2003-07-15 | Ohbayashi Corp | Welding cable, welding equipment, and method of welding |
| CN101838927A (en) * | 2010-05-21 | 2010-09-22 | 中纺标(北京)检验认证中心有限公司 | Testing device and method for magnetic induction intensity of textile surfaces |
| CN202133535U (en) * | 2011-04-22 | 2012-02-01 | 襄樊五二五泵业有限公司 | Magnetic leakage coefficient detection apparatus for magnetic shaft coupler |
| CN204035823U (en) * | 2014-07-25 | 2014-12-24 | 中国石油天然气股份有限公司 | A kind of pipeline chain type magnetic conduction instrument optimizing demagnetization |
Non-Patent Citations (2)
| Title |
|---|
| 唐行华: "浅谈消除管道磁性的方法", 《金属加工 热加工》 * |
| 王云峰: "强磁性管道现场焊接消磁技术", 《石油化工建设》 * |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150520 |