CN1621192A - Magnetic field assistant laser welding device - Google Patents

Magnetic field assistant laser welding device Download PDF

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Publication number
CN1621192A
CN1621192A CN 200410101556 CN200410101556A CN1621192A CN 1621192 A CN1621192 A CN 1621192A CN 200410101556 CN200410101556 CN 200410101556 CN 200410101556 A CN200410101556 A CN 200410101556A CN 1621192 A CN1621192 A CN 1621192A
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China
Prior art keywords
magnetic field
pure iron
welding device
laser welding
assistant laser
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CN 200410101556
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Chinese (zh)
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CN1302888C (en
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肖荣诗
金培有
汪辉松
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Beijing University of Technology
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Beijing University of Technology
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Publication of CN1302888C publication Critical patent/CN1302888C/en
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Abstract

The magnetic field aided laser welding device in laser processing technology field features that the magnetic field unit includes three parts of permanent magnets, pure iron blocks and cylindrical casing. The pure iron blocks are distributed inside the cylindrical casing and have their lower parts extending beyond the casing, approach mutually and separate by 5-25 mm; the permanent magnets are distributed between pure iron blocks with the magnetic poles of the same sign in the same direction; and the cylindrical casing is made of material of low magnetic permeability. The magnetic field unit is installed onto the welding focusing head to provide strong magnetic field, and has simple structure, easy installation and less degaussing.

Description

A kind of magnetic field assistant laser welding device
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 permanent magnet 10,12, pure iron 7,11 and cylinder-shaped coat 13 3 parts.Pure iron a7, pure iron b11 symmetry tight distribution is in cylinder-shaped coat 13 inboards, and stretch out near also keeping (5～25mm) distance pure iron a7, b11 lower end; Permanent magnet 10,12 tight distribution are between pure iron a7, b11, and magnetic pole of the same name distributes in the same way, constitute cylindrical structure jointly with pure iron a7, pure iron b11.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.
Permanent magnet 10,12 of the present invention is characterized in that permanent magnet 10,12 distributes in the same way, can be made of 1,2,3,4 little permanent magnet respectively, and the N of little permanent magnet, S the two poles of the earth join end to end.
Pure iron 7,11 of the present invention is characterized in that pure iron a7, b11 lower end can adopt the jaw form.
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:
Permanent magnet 10,12 respectively is made up of 3 little permanent magnets, and the N of small magnet, S the two poles of the earth join end to end and constitute two big magnetic sources, the pole orientation unanimity of the same name of permanent magnet 10,12 be symmetrically distributed in pure iron a7, b11, both sides, with pure iron a7, b11, form magnetic circuit in parallel together.Pure iron a7, b11, magnetic conductivity very high (cylinder-shaped coat 13 has low-down magnetic conductivity to ignore), magnetic flux will be by pure iron a7, b11, derives.Pure iron a7, b11, end stretch out cross-sectional area and dwindle and close, form small size magnetic and lack. Permanent magnet 10,12 has very big magnetic potential, produces 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 because permanent magnet 10,12 passes through pure iron a7, the b11 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 pure iron a, 8, laser beam passway, 9 machining areas, 10,12 permanent magnets, 11 pure iron b, 13, cylinder-shaped coat.A laser incident direction.
The specific embodiment
Referring to accompanying drawing 1, by slabCO 2The laser beam that laser instrument (ROFIN DC035) produces is from direction A incident, cross 7 reflections of welding focus head after, through the beam channel 8 in the middle of the magnet servicing unit incide machining area 9, directly affact soldered material 1.
The beam channel 8 that it is 30mm that the magnet servicing unit 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 pure iron a7, derive among the b11, and make permanent magnet 10,12 avoid demagnetization away from high temperature process zone 9, at pure iron a7, machining area 9 between the b11 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., changing pure iron a7, b11, the relative position of terminal and soldered material 1 is 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 permanent magnet (10,12), pure iron (7,11) and cylinder-shaped coat (13) three parts; Pure iron a (7), the symmetrical tight distribution of pure iron b (11) be in cylinder-shaped coat (13) inboard, pure iron a (7), b (11) lower end stretch out near and keep the distance of 5～25mm; Permanent magnet (10,12) tight distribution is between pure iron a (7), b (11), and magnetic pole of the same name distributes in the same way, constitutes cylindrical structure jointly with pure iron a (7), pure iron b (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 permanent magnet (10,12) distributes in the same way, can be made of 1,2,3,4 little permanent magnet 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 the jaw form can be adopted in pure iron a (7), b (11) lower end.
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).
CNB2004101015566A 2004-12-23 2004-12-23 Magnetic field assistant laser welding device Expired - Fee Related CN1302888C (en)

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

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CN1621192A true CN1621192A (en) 2005-06-01
CN1302888C CN1302888C (en) 2007-03-07

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Cited By (8)

* Cited by examiner, † Cited by third party
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
CN103741138A (en) * 2013-12-31 2014-04-23 浙江工业大学 Static magnetic field-laser coaxial composite fusion covering method and device
CN103769746A (en) * 2013-12-30 2014-05-07 华中科技大学 Pulsed high magnetic field auxiliary laser welding method and device
CN105537768A (en) * 2016-02-29 2016-05-04 温州大学 Magnetic field-assisted laser welding device and method
CN106670664A (en) * 2017-02-08 2017-05-17 华中科技大学 Magnetic field intensity adjusting device for assisting laser and arc hybrid welding
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
CN110293324A (en) * 2019-07-29 2019-10-01 长沙理工大学 A kind of electromagnetic field auxiliary laser cutting method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
JP4224735B2 (en) * 1998-07-09 2009-02-18 澁谷工業株式会社 Laser machine focus head
JP2003071592A (en) * 2001-08-30 2003-03-11 Mitsubishi Heavy Ind Ltd Welding device and welding method

Cited By (12)

* Cited by examiner, † Cited by third party
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
CN103769746A (en) * 2013-12-30 2014-05-07 华中科技大学 Pulsed high magnetic field auxiliary laser welding method and device
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
CN103741138A (en) * 2013-12-31 2014-04-23 浙江工业大学 Static magnetic field-laser coaxial composite fusion covering method and device
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
CN105537768A (en) * 2016-02-29 2016-05-04 温州大学 Magnetic field-assisted laser welding device and method
CN106670664A (en) * 2017-02-08 2017-05-17 华中科技大学 Magnetic field intensity adjusting device for assisting laser and arc hybrid welding
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
CN110293324A (en) * 2019-07-29 2019-10-01 长沙理工大学 A kind of electromagnetic field auxiliary laser cutting method
CN110293324B (en) * 2019-07-29 2020-10-30 长沙理工大学 Electromagnetic field assisted laser cutting method

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