CN1302888C - Magnetic field assistant laser welding device - Google Patents
Magnetic field assistant laser welding device Download PDFInfo
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- CN1302888C CN1302888C CNB2004101015566A CN200410101556A CN1302888C CN 1302888 C CN1302888 C CN 1302888C CN B2004101015566 A CNB2004101015566 A CN B2004101015566A CN 200410101556 A CN200410101556 A CN 200410101556A CN 1302888 C CN1302888 C CN 1302888C
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- pure iron
- laser welding
- magnetic field
- welding device
- permanent magnet
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Abstract
The present invention relates to a laser welding device with magnetic field assistance, which belongs to the technical field of laser material processing. External magnetic fields applied to laser welding mainly use electric magnets or permanent magnets; the magnetic fields obtained by the electric magnets have the defects of small magnetic field strength, large energy consumption, complicated structure and inconvenient installation; the permanent magnets are demagnetized in the operating state of high temperature and can be used for a short time. The present invention is characterized in that the present invention comprises permanent magnets (10, 12), pure iron (7, 11) and a cylindrical outer sleeve (13), wherein the pure iron is symmetrically and tightly distributed at the inner side of the cylindrical outer sleeve (13), the lower ends of the pure iron extend outside and are adjacent, and the distance between the lower ends of the pure iron is kept to be from five millimeters to 25 millimeters; the permanent magnets (10, 12) are tightly distributed between the pure iron (7, 11), the homopolar magnetic poles are isodirectionally distributed, and the permanent magnets (10, 12) and the pure iron jointly form a cylindrical structure; the cylindrical outer sleeve (13) is made of material which has low magnetic permeability. The laser welding device is arranged on a welding focusing head. The laser welding device can provide strong magnetic fields and has the advantages of simple structure, convenient installation and operation and difficult demagnetization; besides, the laser welding device can be moved to act on processing areas.
Description
Technical field
The invention belongs to the Materialbearbeitung mit Laserlicht technical field, specifically, relate to a kind of device that is used for laser weld.
Background technology
Laser weld is a kind of material processing method efficiently, is progressively accepted and more and more general application by industrial quarters.
Laser weld itself has many advantages.Laser weld is because laser has good focusing, energy height is concentrated, can use the zone of minimum energy in minimum, and shorten action time greatly, be that process velocity improves greatly, thereby obtain ultrafine seam organization, nearly seam district heat affecting also minimum, guaranteed the superperformance of welding point, and welded distortion is minimum.
Compare with other welding method, laser weld is because photo plasma and concussion welding aperture and molten bath, the laser weld of aluminium alloy particularly, often run into welding process various weld defects unstable and that form thus, for example: depth of weld fluctuations, technology hole form or the like.Therefore further improve the efficient of laser weld by all means, improving the stability of welding process and improving weldquality becomes various countries academia and long-term the pursuing one's goal of industrial quarters.
At present, can influence the flox condition in molten bath by externally-applied magnetic field in laser weld, stabilized welding process improves speed of welding and welding quality.Simultaneously also there is certain influence in magnetic field to the form and the stability of photo plasma, and the fusion penetration of raising weld seam that can be by a small margin.
Mostly the externally-applied magnetic field that applies in laser weld is to utilize the electromagnet or the magnetic field of permanent magnet.Electromagnet applies magnetic field, and magnetic field intensity is little and electromagnet consumes energy, complex structure, and inconvenience is installed.Permanent magnet is the both sides that placed weld seam by two magnetic poles respectively, is directly adjacent to weldering molten bath and the photic plasma that makes in laser weld, demagnetization under the duty of high temperature, so permanent magnet short time use only.Owing to above-mentioned reason has had a strong impact on, the application of magnetic control technology in laser weld.
Purpose of the present invention is exactly at above-mentioned two kinds of deficiencies that apply magnetic field device, designs a kind of laser weld magnet servicing unit.This device can provide stronger magnetic field, and is simple in structure, and installation, easy to use is difficult for demagnetization.And can be installed on the welding focus head and move and act on machining area simultaneously with plumb joint.
Summary of the invention
The object of the present invention is to provide a kind of magnetic field assistant laser welding device, this mechanism can provide the magnetic field of desirable strength, improves welding quality.
A kind of magnetic field assistant laser welding device is characterized in that: comprise two permanent magnets, two blocks of pure iron and cylinder-shaped coat 13 3 parts.First pure iron 7, second pure iron, 11 symmetrical tight distribution are in cylinder-shaped coat 13 inboards, and first pure iron 7, second pure iron 11 stretch out near also keeping (5～25mm) distance near an end of machining area 9; First permanent magnet 10, second permanent magnet, 12 tight distribution are between first pure iron 7, second pure iron 11, and magnetic pole of the same name distributes in the same way, with first pure iron 7, second pure iron, 11 common formation cylindrical structures.Cylinder-shaped coat 13 adopts low magnetic permeability material to make.All adopt conventional method to connect between each parts of the present invention, this magnetic field assistant laser welding device adopts conventional method to be installed on the welding focus head 3.
Two permanent magnets of the present invention is characterized in that first permanent magnet 10, second permanent magnet 12 distribute in the same way, can be made of 2,3,4 little permanent magnets respectively, and the N of little permanent magnet, S the two poles of the earth join end to end.
Two blocks of pure iron of the present invention is characterized in that first pure iron 7, second pure iron 11 adopt the jaw form of shrinking near an end of machining area 9.
Cylinder-shaped coat 13 of the present invention is characterized in that cylinder-shaped coat 13 can be made by the austenitic stainless steel material of low magnetic permeability.
Magnetic field assistant laser welding device of the present invention is installed on the welding focus head 3 by bolt.
The present invention is simple in structure, is convenient to processing, and is easy for installation.Can the stabilized lasers welding process, improve welding quality.To play facilitation to the extensive use of laser welding technology in industry.
Operation principle of the present invention is as follows:
First permanent magnet 10, second permanent magnet 12 respectively are made up of 3 little permanent magnets, the N of small magnet, S the two poles of the earth join end to end and constitute two big magnetic sources, the both sides that are symmetrically distributed in first pure iron 7, second pure iron 11 of the pole orientation unanimity of the same name of first permanent magnet 10, second permanent magnet 12 form magnetic circuit in parallel with first pure iron 7, second pure iron 11.The magnetic conductivity of first pure iron 7, second pure iron 11 very high (cylinder-shaped coat 13 has low-down magnetic conductivity to ignore), magnetic flux will be derived by first pure iron 7, second pure iron 11.First pure iron 7, second pure iron, 11 ends stretch out cross-sectional area and dwindle and close, form small size magnetic and lack.First permanent magnet 10, second permanent magnet 12 have very big magnetic potential, produce very big magnetic induction intensity in magnetic lacks, and direction is close to parallel with laser channeling.The size of short-range intrinsic inductance has certain variation on the laser channeling direction, but the magnetic field of selection intensity is provided.And since first permanent magnet 10, second permanent magnet 12 by first pure iron 7, second pure iron 11 machining area 9 with the magnetic flux guided laser, the high temperature demagnetization can not take place, the stable magnetic field of acquisition away from the weldering molten bath 5 and the photic plasma 6 that makes of high temperature in itself.
Description of drawings:
Fig. 1: scheme of installation 1 of the present invention;
Fig. 2: magnetic field assistant laser welding device structural representation of the present invention
1 soldered material among the figure, 2 laser beams, 3 welding focus heads, 4 magnet servicing units, 5 photo plasmas, 6 welding pools, 7 first pure iron, 8, laser beam passway, 9 machining areas, 10, first permanent magnet, 11 second pure iron, 12, second permanent magnet, 13, cylinder-shaped coat.A laser incident direction.
The specific embodiment
Referring to accompanying drawing, by slabCO
2The laser beam that laser instrument (ROFIN DC035) produces is from direction A incident, cross 3 reflections of welding focus head after, through the beam channel 8 in the middle of the magnet servicing unit 4 incide machining area 9, directly affact soldered material 1.
The beam channel 8 that it is 30mm that magnet servicing unit 4 has a diameter, laser beam passes through when guaranteeing laser weld.Permanent magnet 10, the magnetic direction of dashing of six permanent magnets of 12 guarantees that magnetic strength is from first pure iron 7, derive in second pure iron 11, and make first permanent magnet 10, second permanent magnet 12 is avoided demagnetization away from high temperature process zone 9, at first pure iron 7, machining area 9 between second pure iron 11 produces certain magnetic field, in the photo plasma 5 of welding pool 6 and welding generation can being included in this field region welding process, guarantee that always there are certain magnetic field intensity in molten bath 6 and photo plasma 5, and on the direction that incides soldered material of laser beam, magnetic field intensity has certain variation 0.2～1.1T in the short-range on beam direction.Change the relative position of first pure iron 7, second pure iron, 11 ends and soldered material 1, because soldered material 1 is in the selected needed magnetic field intensities of the position in magnetic field difference.
Claims (5)
1, a kind of magnetic field assistant laser welding device is characterized in that: comprise two permanent magnets, two blocks of pure iron and cylinder-shaped coat (13) three parts; First pure iron (7), the symmetrical tight distribution of second pure iron (11) be in cylinder-shaped coat (13) inboard, first pure iron (7), second pure iron (11) near an end of machining area (9) stretch out near and keep the distance of 5～25mm; First permanent magnet (10), second permanent magnet (12) tight distribution are between first pure iron (7), second pure iron (11), and magnetic pole of the same name distributes in the same way, constitute cylindrical structure jointly with first pure iron (7), second pure iron (11); Cylinder-shaped coat (13) adopts low magnetic permeability material to make; All adopt conventional method to connect between each parts of the present invention, this magnetic field assistant laser welding device adopts conventional method to be installed on the welding focus head (3).
2, a kind of magnetic field assistant laser welding device according to claim 1, wherein first permanent magnet (10), second permanent magnet (12) distribute in the same way, can be made of 2,3,4 little permanent magnets respectively, and the N of little permanent magnet, S the two poles of the earth join end to end.
3, a kind of magnetic field assistant laser welding device according to claim 1, wherein first pure iron (7), second pure iron (11) adopt the jaw form of shrinking near an end of machining area (9).
4, a kind of magnetic field assistant laser welding device according to claim 1, wherein said cylinder-shaped coat (13) is characterized in that cylinder-shaped coat (13) can be made by the austenitic stainless steel material of low magnetic permeability.
5, a kind of magnetic field assistant laser welding device according to claim 1, this magnetic field assistant laser welding device adopt bolt to be installed on the welding focus head (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101015566A CN1302888C (en) | 2004-12-23 | 2004-12-23 | Magnetic field assistant laser welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101015566A CN1302888C (en) | 2004-12-23 | 2004-12-23 | Magnetic field assistant laser welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1621192A CN1621192A (en) | 2005-06-01 |
| CN1302888C true CN1302888C (en) | 2007-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNB2004101015566A Expired - Fee Related CN1302888C (en) | 2004-12-23 | 2004-12-23 | Magnetic field assistant laser welding device |
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| CN (1) | CN1302888C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101347857B (en) * | 2007-07-20 | 2012-02-08 | 沈阳工业大学 | Production method for improving wearing resistance of plasma arc surfacing |
| CN101862913B (en) * | 2010-05-13 | 2012-09-19 | 重庆大学 | Electromagnetic current coupling field assisted hybrid melting-brazing method for laser-TIG arc and equipment |
| CN103769746B (en) * | 2013-12-30 | 2015-10-28 | 华中科技大学 | A kind of impulse magnetic field auxiliary laser welding method and equipment |
| CN103741138B (en) * | 2013-12-31 | 2017-02-22 | 浙江工业大学 | Static magnetic field-laser coaxial composite fusion covering method and device |
| CN105537768B (en) * | 2016-02-29 | 2017-09-05 | 温州大学 | A kind of magnetic field assistant laser welding device and method |
| CN106670664B (en) * | 2017-02-08 | 2018-10-30 | 华中科技大学 | A kind of magnetic field intensity regulating device of the electric arc combined welding of auxiliary laser |
| CN108581194A (en) * | 2018-06-28 | 2018-09-28 | 广东正业科技股份有限公司 | A kind of method and apparatus of removal plasma cloud |
| CN110293324B (en) * | 2019-07-29 | 2020-10-30 | 长沙理工大学 | Electromagnetic field assisted laser cutting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015818A (en) * | 1988-12-30 | 1991-05-14 | Zenith Electronics Corporation | Magnetic collector for FTM laser weld debris and method |
| JPH05253683A (en) * | 1992-03-12 | 1993-10-05 | Nisshin Steel Co Ltd | Laser beam spot welding method and welding torch |
| JP2000024790A (en) * | 1998-07-09 | 2000-01-25 | Shibuya Kogyo Co Ltd | Focus head of laser beam machine |
| JP2003071592A (en) * | 2001-08-30 | 2003-03-11 | Mitsubishi Heavy Ind Ltd | Welding device and welding method |
-
2004
- 2004-12-23 CN CNB2004101015566A patent/CN1302888C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015818A (en) * | 1988-12-30 | 1991-05-14 | Zenith Electronics Corporation | Magnetic collector for FTM laser weld debris and method |
| JPH05253683A (en) * | 1992-03-12 | 1993-10-05 | Nisshin Steel Co Ltd | Laser beam spot welding method and welding torch |
| JP2000024790A (en) * | 1998-07-09 | 2000-01-25 | Shibuya Kogyo Co Ltd | Focus head of laser beam machine |
| JP2003071592A (en) * | 2001-08-30 | 2003-03-11 | Mitsubishi Heavy Ind Ltd | Welding device and welding method |
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| CN1621192A (en) | 2005-06-01 |
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