CN101492765B - Apparatus and method for refining magnetic domain of electrical steel sheet - Google Patents
Apparatus and method for refining magnetic domain of electrical steel sheet Download PDFInfo
- Publication number
- CN101492765B CN101492765B CN2008101892477A CN200810189247A CN101492765B CN 101492765 B CN101492765 B CN 101492765B CN 2008101892477 A CN2008101892477 A CN 2008101892477A CN 200810189247 A CN200810189247 A CN 200810189247A CN 101492765 B CN101492765 B CN 101492765B
- Authority
- CN
- China
- Prior art keywords
- laser beam
- electrical sheet
- mirror
- magnetic domain
- refinement
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
- B23K26/0673—Dividing the beam into multiple beams, e.g. multifocusing into independently operating sub-beams, e.g. beam multiplexing to provide laser beams for several stations
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
- B23K26/0736—Shaping the laser spot into an oval shape, e.g. elliptic shape
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
Abstract
Disclosed herein is an apparatus for refining a magnetic domain of an electrical steel sheet and a method of refining a magnetic domain of an electrical steel sheet. The apparatus for refining a magnetic domain of an electrical steel sheet includes: a laser beam emission unit; a toroidal mirror for converting the laser beam emitted from the laser beam emission unit into a first elliptical laser beam; a switch mirror for transferring the first elliptic laser beam transferred from the toroidal mirror to a pair of scan mirrors; the pair of scan mirrors for scanning the first elliptical laser beam transferred from the switch mirror and then transferring the scanned first elliptical laser beam; a cylindrical mirror for converting the first elliptical laser beam transferred from the pair of scan mirrors into a second elliptical laser beam and then irradiating the electrical steel sheet with the second elliptical laser beam.
Description
Technical field
The present invention relates to a kind of device that is used for making with low iron loss and low noise grain-oriented electrical steel sheet (grain-oriented electrical steel sheet); More specifically, relate to a kind of device that is used for the magnetic domain of refinement electrical sheet, use said device refinement electrical sheet magnetic domain method with and magnetic domain use the electrical sheet of this method refinement.
Background technology
Grain-oriented electrical steel sheet has { 110} < 001>orientation texture that forms along rolling direction.United States Patent(USP) No. 1,965,559 disclose a kind of method of making grain-oriented electrical steel sheet first.After this, this method is enhanced, and has multiple novel method to be suggested simultaneously.Usually when making grain-oriented electrical steel sheet, use the throw out or the grain boundary segregation element that are called as suppressor factor, it is used to suppress the growth of primary recrystallization crystal grain.This suppressor factor is used to suppress the growth of primary recrystallization crystal grain, and makes { the directed grain growing of 110} < 001>in the non-growth property primary recrystallization crystal grain.This phenomenon is called as secondary recrystallization.Like this, most important factor is to form { the directed secondary recrystallization crystal grain of 110} < 001>along rolling direction in the method for making grain-oriented electrical steel sheet.
Yet in the electrical sheet of reality, (110) plane of each crystal grain tilts with respect to the plane of electrical sheet a little, and [001] direction of each crystal grain even also inclination a little on rolling direction.Usually, the magnetic of electrical sheet receives this obliquity effects very much, thereby the researchist of this area does everything possible and reduces iron loss through making each crystal grain be similar to (110) [001] ideal orientation.Therefore, current, suitability for industrialized production have an electrical sheet of low iron loss, be that W17/50 is about 0.85watt/kg under the situation of 0.23mm wherein at electrical sheet thickness.Here, W17/50 is that magnetic flux density is 1.7 teslas, the iron loss when frequency is 50Hz.
Yet to reduce iron loss be limited through making each crystal grain be similar to (110) [001] ideal orientation.Usually, iron loss depends on grain-size and crystalline orientation.Grain-size in the grain-oriented electrical steel sheet in several millimeters to several centimetres scope, above-mentioned to obtain (110) [001] crystalline orientation.Current, this grain-size can not be adjusted arbitrarily by the researchist.Its reason is that (110) [001] crystalline orientation must the first acquisition through the long term thermal treating processes.Therefore, the researchist has developed the technology that is used for artificial adjustment grain-size.In these technology; Disclose the instrument that a kind of use such as knife, iron brush etc. have sharpened tip and drawn the method for carving the electrical sheet surface; This method is used, and secondary recrystallization, final insulation, tension force apply solidified finished product (with reference to United States Patent(USP) No. 3,647,575) then.
After this, as the advanced more technology of manual work adjustment grain-size, disclosing a kind of surface through use laser apparatus irradiation electrical sheet provides a kind of discontinuous plan such as grain boundary to reduce the method for iron loss.This laser apparatus is Nd-YAG (neodymium-Yttrium-Aluminium-Garnet) laser apparatus, and with Q-switch (Q-swith) mode operation.Yet the problem of this method is, when with the laser beam irradiation electrical sheet, is formed on the lip-deep coating of electrical sheet by laser beam evaporation, therefore need carry out coating procedure once more, thereby reduce productivity.
, as a kind of laser scanning device, disclose a kind of use plane mirror make laser beam along the width of electrical sheet reciprocating laser irradiating device, but this laser irradiating device does not have again by further improvement thereafter.Its reason is following.At first, a position of plane mirror is by laser beam continuous irradiation, makes flat mirror reflects part laser energy and absorbs other part of laser energy, and the result causes the inboard temperature of electrical sheet to increase, thereby is easy to destroy the surface of electrical sheet.In other words, because the heat problem of plane mirror does not solve, this technology does not have again by further improvement.Secondly, because the to-and-fro movement of plane mirror to form the irradiation line in a zigzag, makes that the interval between the irradiation line is continuously changed on electrical sheet, the result causes obtaining the irradiation effect equably.Once more, because not to-and-fro movement fast of plane mirror, productivity is low.
In order to solve the problem that comes from plane mirror, the laser irradiating device of a kind of use polygon mirror (polygonmirror) has been proposed.In this laser irradiating device; By the circular turner rotation that is furnished with a plurality of plane mirrors on it; Each plane mirror is with the surface of laser beam irradiation electrical sheet, and then another plane mirror adjacent to said plane mirror receives said laser beam and follows the surface of using the said electrical sheet of laser beam irradiation that is received.Yet, use the problem of the laser irradiating device of polygon mirror to be, because the diameter of turner is 300mm or bigger and be provided with the expensive plane mirror of dozens of, so noise is serious and price is high.And, use the problem of the laser irradiating device of polygon mirror to be, owing to be used as laser beam sources, be damaged so can not prevent the coating of electrical sheet with the Nd-YAG laser apparatus of Q-switch mode operation.
And when laser beam was focused to collimated beam and passes collimating lens, said collimated beam incided on the polygon mirror, and then the incident collimated beam focuses on and passes F θ lens, is applied on the steel plate then.Because the laser beam of said focusing and distance are pro rata by diffusion, the increase of the distance between polygon mirror and the F θ lens is conditional, and therefore to use the irradiation distance maximum of the laser beam of polygon mirror be tens of millimeters.Therefore, in using the laser irradiating device of polygon mirror, be tens of millimeters owing to use the irradiation width of polygon mirror, the width of suppose electrical sheet is 1000mm, need at least ten polygon mirrors and with the corresponding laser apparatus of the number of this polygon mirror.And the border between irradiation zone receives dual irradiation, has therefore reduced the effect of improving of iron loss.
Summary of the invention
Technical problem
Therefore; Consider the problems referred to above that exist in the prior art and make the present invention, and the purpose of this invention is to provide and a kind ofly reduce iron loss and reduce magnetostrictive device simultaneously that wherein MS is a reason that causes noise through surface with the laser beam irradiation grain-oriented electrical steel sheet; More specifically; Therefore the purpose of this invention is to provide a kind of device that is used for the magnetic domain of refinement electrical sheet, wherein use two laser apparatus and six plane mirrors laser beam to be applied on the width of electrical sheet, the magnetic domain of refinement electrical sheet effectively; And wherein do not damage coating, therefore need not apply again electrical sheet.
Technical scheme
To achieve these goals, one side of the present invention provides a kind of device that is used for the magnetic domain of refinement electrical sheet, and this device comprises an optical system, and said optical system comprises: the laser beam transmitter unit that is used to produce laser beam; The switch mirror, be used for receiving from laser beam transmitter unit emitted laser bundle and then respectively (alternately) transmission laser beam change transmission direction simultaneously; And a pair of scanning mirror, be used to scan the laser beam that respectively transmits from said switch mirror and also then laser beam respectively be applied to electrical sheet.
In this device, this is to scanning mirror left and right sides to-and-fro movement in opposite direction.
And; Said switch mirror respectively is transferred to said a pair of scanning mirror with laser beam in the following manner: only when this moves with pre-determined direction in the scanning mirror each; Laser beam is sent to this in the scanning mirror each; And when this in the scanning mirror each during with the direction operation opposite with its traffic direction, the blocking laser bundle.
In this case; This device further comprises: toroidal reflectors; It is set between said laser beam transmitter unit and the said switch mirror; Said toroidal reflectors is used for converting the laser beam from said laser beam transmitter unit transmission into the oval-shaped laser bundle, and said oval-shaped laser bundle is transferred to the switch mirror; And cylindrical mirror, it is set at electrical sheet top, and said cylindrical mirror is used for converting difform oval-shaped laser bundle into from this oval-shaped laser bundle to the scanning mirror transmission, and said difform oval-shaped laser bundle is applied on the electrical sheet.
This device is provided with a plurality of optical systems, so that the irradiation range of laser beam on the width of electrical sheet is multiplied.
In this device, this adheres on the copper bearing (copper support) in the scanning mirror each, and said copper bearing is provided with microcapillary (minute tube) within it, flows through said copper bearing to allow water coolant.
And, in this device, will be used for refrigerative nitrogen and be sprayed onto this each surface, to cool off said scanning mirror and to prevent that said scanning mirror from being made dirty by dust scanning mirror.
And; In this device; The carbon dioxide laser that will have continuous-wave mode is as laser apparatus; Coating to prevent to be formed on the electrical sheet is destroyed, and speculum is arranged between said laser beam transmitter unit and the said toroidal reflectors, and said speculum is used for reflection lasering beam and institute's laser light reflected bundle is transferred to said toroidal reflectors.
Another aspect of the present invention provides a kind of method of magnetic domain of refinement electrical sheet; Wherein use the said electrical sheet of laser beam irradiation; Therefore on said electrical sheet, form the cut that does not have the zigzag line pattern, this method comprises: laser beam respectively is transferred to the reciprocating scanning mirror in a pair of left and right sides; And, through on the scanning direction, respectively moving this to scanning mirror, with the said electrical sheet of laser beam irradiation.
The method of the magnetic domain of said refinement electrical sheet further comprises: convert said laser beam into the oval-shaped laser bundle, with the axis that allows said oval-shaped laser bundle in the irradiation direction of said laser beam, thereby improve the irradiance rate of said laser beam.
In the method, the operation that said laser beam is converted into the oval-shaped laser bundle is performed twice or more times, so that the shape of the luminous point of said laser beam is more tiny.
In this case, through said laser beam being transferred to curved surface toroidal reflectors or curved surface cylindrical mirror, convert said laser beam into the oval-shaped laser bundle.
One side more of the present invention provides a kind of electrical sheet; This electrical sheet is coated with insulating film; Its magnetic domain is by refinement; Width along electrical sheet is formed with a plurality of cuts with laser beam above that, and wherein on said electrical sheet, being formed with length is 300mm or longer continuous linear cut, and said insulating film is not destroyed by said cut.
In this case, the magnetic domain of the said electrical sheet of refinement under 20mpm or higher steel plate translational speed.And said electrical sheet is provided with the cut with zigzag line pattern.And said electrical sheet has 1000mm or bigger width, and is formed with one to four cut along its width above that.
Another aspect of the present invention provides a kind of electrical sheet that uses said method to make.
Beneficial effect
The device advantage that is used for the magnetic domain of crystal grain thinning oriented electrical steel according to the present invention is that iron loss is lowered 10% or more, and coating is not damaged.And; The device advantage that is used for the magnetic domain of crystal grain thinning oriented electrical steel according to the present invention is; Be different from traditional large-scale polygon mirror type; Through flat scanning mirror that communicate with each other, very small dimensions and switch mirror laser beam is applied on the electrical sheet continuously, makes on said electrical sheet to form 300mm or longer continuous cut and do not form the cut of zigzag line pattern that the said electrical sheet of result can receive the irradiation of wide region; And this device advantage is; Toroidal reflectors and cylindrical mirror are used with minimum laser apparatus and mirror (switch mirror and scanning mirror), the irradiation range of the electrical sheet that therefore can be multiplied, and the refinement of the magnetic domain of said electrical sheet can be got caught up in fast linear speed.And; The device advantage that is used for the magnetic domain of crystal grain thinning oriented electrical steel according to the present invention is; Since this device be do not have noise and very for ease of maintenaince and repair, so be eco-friendly, and can significantly reduce production cost than conventional apparatus.
Description of drawings
Fig. 1 is a synoptic diagram, and it illustrates the process of the magnetic domain of refinement electrical sheet according to one embodiment of the present invention;
Fig. 2 is a view, and it is used to explain the device of the magnetic domain that is used for the refinement electrical sheet according to one embodiment of the present invention;
Fig. 3 is a view, and it is used to explain the alteration of form of the device of the magnetic domain that is used for the refinement electrical sheet according to one embodiment of the present invention;
Fig. 4 is a view, and it illustrates according to one embodiment of the present invention cylindrical mirror with respect to the tilted-putted state of electrical sheet; And
Fig. 5 is a chart, its illustrate depend on laser power, the electrical sheet iron loss improve effect.
* to the explanation * of element in the accompanying drawing
2: steel plate
5: cylindrical mirror
6,7: the laser beam transmitter unit
8,9: laser beam
10,11: the switch mirror
12,13: scanning mirror
Embodiment
Hereinafter, will describe the preferred embodiments of the invention in detail, make those of ordinary skill in the art's technological thought of embodiment of the present invention easily with reference to accompanying drawing.Yet, the invention is not restricted to following embodiment, and can otherwise implement.Following embodiment is provided,, and technological thought of the present invention is fully conveyed to those of ordinary skill in the art so that scope of the present invention and purport understood fully.
In embodiments of the invention, although used term " at first, secondly or the like " in order to describe integral part of the present invention, integral part of the present invention is not subject to said term.Use these terms to be merely and distinguish predetermined integral part and other integral parts.
To wherein in different figure, use identical reference number to represent same or analogous parts with reference to accompanying drawing now.
Fig. 1 is a synoptic diagram, and it illustrates the process of the magnetic domain of refinement electrical sheet according to one embodiment of the present invention.With reference to figure 1, steel plate 2 launches from Abrollhaspel 1, and with first pinch roll 3 and second pinch roll 3 ' formation path-line.Therefore, steel plate 2 launches and then is rolled onto on the film spool 14 again from Abrollhaspel 1.Arrive first scanning mirror to 12 from first laser beam 9 of the first laser beam transmitter unit, 6 emissions.Said first scanning mirror is to 12 left and right sides to-and-fro movements, and simultaneously first laser beam 9 is transferred to the cylindrical mirror 5 into parabolic reflector.
Steel plate with laser beam irradiation passes continuous iron loss metering facility 30, and measures the iron loss of steel plate simultaneously.Before steel plate 2 passes the magnetic domain device for thinning, X-ray reflectogauge 4 is arranged on the steel plate 2.Can use measured iron loss and thickness signal, show the iron loss of the steel plate 2 of per unit weight.Therefore, the staff can understand the effect of the magnetic domain of refinement steel plate 2.
Hereinafter, will be with reference to the device of figure 2 detailed descriptions according to the magnetic domain that is used for the refinement electrical sheet of an embodiment of the present invention.
The device 100 that is used for the magnetic domain of refinement electrical sheet comprises first optical system and second optical system.Said first optical system and second optical system respectively with laser beam be applied to steel plate 2 along the whole zone of steel plate 2 widths 1/2 on.For example, first optical system and second optical system with laser beam be applied to steel plate 2 along on the 600mm of the whole length of steel plate 2 widths.First optical system comprises the first laser beam transmitter unit 6, a pair of first speculum 15 and 16, first toroidal reflectors 17, the first switch mirror 11, a pair of first scanning mirror 12 and cylindrical mirror 5.Second optical system comprises the second laser beam transmitter unit 7, a pair of second speculum 18 and 19, second toroidal reflectors 20, second switch mirror 10, a pair of second scanning mirror 12 and cylindrical mirror 5.
Because first optical system is moved with the mode identical with second optical system, only describes first optical system below.
In first optical system, from the first laser beam transmitter unit, 6 emissions, first circular laser beam 9.From having the carbonic acid gas (CO of continuous-wave mode
2) laser apparatus emitted laser bundle, promptly in advancing not by the laser beam of diffusion, can be used as first circular laser beam 9, and need not focus on the collimating lens of said first circular laser beam 9.First circular laser beam 9 should be changed the back to first speculum 15 and 16 in its path and arrived first toroidal reflectors 17.Toroidal reflectors 17 is curved mirrors, is used for converting first circular laser beam 9 into first oval-shaped laser bundle 21.The first oval-shaped laser bundle 21 is transferred to the first switch mirror 11 from toroidal reflectors 17.The first switch mirror 11 respectively is transferred to this to first scanning mirror 12 (12a and 12b) with the first oval-shaped laser bundle 21.These two first scanning mirror 12a and 12b to-and-fro movement in the opposite direction.Promptly; When a 12a in first scanning mirror 12 receives the first oval-shaped laser bundle 21 with when the left side of cylindrical mirror 5 is scanned to the right from the first switch mirror 11; Another 12b in first scanning mirror 12 is sent to cylindrical mirror 5 with the first oval-shaped laser bundle 21, and then is back to the left side from the right side of cylindrical mirror 5.
Since when first scanning mirror 12 only along a direction when the first oval-shaped laser bundle 21 is transferred to cylindrical mirror 5 switch mirror 11 the first oval-shaped laser bundle 21 is transferred to first scanning mirror 12 and when first scanning mirror, 12 edges transfer to cylindrical mirror 5 with this direction in the opposite direction with the first oval-shaped laser bundle 21 switch mirror 11 block the first oval-shaped laser bundle 21, so switch mirror 11 can prevent that the first oval-shaped laser bundle, 21 quilts are with zigzag irradiation.
Since from the first oval-shaped laser bundle 21 of first scanning mirror 12 emission during advancing not by diffusion; Can increase the distance between first scanning mirror 12 and the cylindrical mirror 5; Making also to increase the irradiation distance of the first oval-shaped laser bundle 21 to cylindrical mirror 5, therefore can on steel plate, form the successive cut.
In addition, can easily adjust the irradiation distance of the first oval-shaped laser bundle 21 through changing the reciprocal rotation angle of first scanning mirror 12 to cylindrical mirror 5.In this case, the irradiation distance that preferably makes the oval-shaped laser bundle 21 of winning arrive cylindrical mirror 5 through the reciprocal rotation angle of confirming first scanning mirror 12 increases, and on steel plate, forms 300mm or longer continuous cut.Therefore; Because at width is four of formation or continuous cut still less on 1000mm or wideer, as to be preferably the about 1200mm steel plate; Can be through four or laser apparatus still less and mirror (switch mirror, toroidal reflectors and cylindrical mirror) and four pairs or still less to the magnetic domain of the efficient refinement steel plate of scanning mirror, thus the production efficiency of maximization and reduce production cost.
The first oval-shaped laser bundle 21 that cylindrical mirror 5 will arrive cylindrical mirror 5 converts the second oval-shaped laser bundle 22 into.With the second oval-shaped laser bundle, 22 irradiation steel plates 2, so the magnetic domain of steel plate 2 obtains refinement.
In embodiments of the invention,, need the said mirror of cooling to increase, and need prevent that mirror from being made dirty by dust with the temperature that prevents said mirror because laser beam is applied on the mirror (toroidal reflectors, switch mirror, scanning mirror, cylindrical mirror etc.) continuously.Water coolant can be used so that cool off said mirror.For example; Can cool off said mirror in the following manner: said mirror is adhered on the bearing, in said bearing, forms microcapillary, and then make cooling water circulation through said microcapillary (perhaps; When mirror itself was major portion (body), water coolant can flow around said mirror itself); And can adjust the cooling power of said mirror through the flow velocity of controlled chilling water.Simultaneously, can on the surface of mirror, form gas curtain, made dirty by dust with the surface of the mirror of laser beam irradiation preventing.For example, through will being used for the surface that refrigerative nitrogen is sprayed onto mirror, not only can prevent that mirror from being made dirty by dust but also can prevent that the temperature of mirror from increasing.
The alteration of form of the device of the magnetic domain that is used for the refinement electrical sheet is according to one embodiment of the present invention described referring now to Fig. 3.First laser beam 9 has round-shaped.First laser beam 9 is converted into the first oval-shaped laser bundle 21 by toroidal reflectors 17.The first oval-shaped laser bundle 21 is converted into the second long slightly oval-shaped laser bundle 22 by cylindrical mirror.Through this to first scanning mirror 12 with should on steel plate 2, respectively form irradiation line 23 and 24 to second scanning mirror 13.According to embodiment of the present invention, owing to use oval-shaped laser Shu Erfei circular laser beam to carry out the refinement of the magnetic domain of steel plate 2, so this refinement can be got caught up in high linear speed.Its reason is that than circular laser beam, the oval-shaped laser bundle can carry out the refinement of the magnetic domain of steel plate 2 at short notice.
With reference to figure 4, along the length direction of cylindrical mirror 5, this be transferred to cylindrical mirror 5 to second scanning mirror 13 with the first oval-shaped laser bundle 21 with being somebody's turn to do to first scanning mirror 12.The length direction of cylindrical mirror tilts with respect to the width of steel plate 2, therefore can the second oval-shaped laser bundle 22 be applied to (in Fig. 4, arrow is represented steel plate progressive direction) on the steel plate 2 along the direction of the width that is parallel to steel plate 2.Therefore, the second oval-shaped laser bundle 22 is not by to be applied on the steel plate 2 in a zigzag, between the irradiation line be fixed at interval like this, so the effect of the magnetic domain of the said steel plate of refinement is uniform.
A kind of method of magnetic domain of the device refinement electrical sheet that uses the above-mentioned magnetic domain that is used for the refinement electrical sheet will be described below.At first, in the opposite direction under the reciprocating state in the left and right sides, produce first circular laser beam 9 at the first scanning mirror 12a and 12b from laser beam transmitter unit 6.
Next, first circular laser beam 9 is transferred to toroidal reflectors 17, is converted into the first oval-shaped laser bundle 21 with toroidal reflectors 17 then.In this case, the minor axis length of the preferred first oval-shaped laser bundle 21 is less than the diameter of first circular laser beam 9.Its reason is, the major axis that makes it possible to be applied to the second oval-shaped laser bundle 22 of steel plate is formed on the irradiation direction.
Next, the switch mirror 11 that receives the first oval-shaped laser bundle 21 respectively is transferred to scanning mirror 12a and 12b with the first oval-shaped laser bundle 21.
The first oval-shaped laser bundle 21 that each scanning among scanning mirror 12a and the 12b is respectively transmitted from switch mirror 11 moves so that the scanning direction is alternate simultaneously.
Next, in order suitably to adjust the shape of the light beam that is applied to steel plate, convert the first oval-shaped laser bundle 21 into second oval-shaped laser bundle 22.Width along steel plate 22 is applied to steel plate with the second oval-shaped laser bundle 22, makes said steel plate drawn quarter, thus the magnetic domain of the said steel plate of refinement.
On the steel plate of its magnetic domain, be formed with linear cut but not the zigzag cut, thereby improve the iron loss of steel plate greatly through the aforesaid method refinement.
And, owing to, can improve the irradiance rate of laser beam, and can prevent in the cut forming process, to be destroyed at the insulation layer that forms on the surface of steel plate with the oval-shaped laser bundle irradiation steel plate of major axis along irradiation direction formation.
Because the width of conventional steel plates is 1000mm or bigger; Be preferably about 1200mm; So when the length of cut during less than 300mm the width along steel plate on said steel plate, form five or more a plurality of cut, thereby the iron loss that causes being attributable to the refinement of steel plate magnetic domain is improved effect and is reduced.And, in the refinement of steel plate magnetic domain, need five or more a plurality of laser apparatus and mirror (switch mirror, toroidal reflectors and cylindrical mirror) and five pairs or more, thereby reduced production efficiency and increased maintenance cost scanning mirror.Therefore, preferably, be 1000mm or be 300mm or longer continuous cut more greatly, especially for forming one to four length on the steel plate of about 1200mm at width.
Employed in embodiments of the invention laser apparatus is the carbonic acid gas (CO with continuous-wave mode
2) laser apparatus.The power regulation of said laser apparatus is arrived such degree, promptly make the iron loss improvement rate coating good and that on surface of steel plate, form of steel plate not evaporate.
Effectively, will be applied to from two laser beams 8 and 9 of each laser beam transmitter unit emission steel plate 2 along on the 600mm of the whole length of steel plate 2 widths.Its reason is because the restriction of the translational speed of scanning mirror 10 and 11.According to an embodiment of the present invention; Consider the translational speed of scanning mirror 10 and 11; To be that the 600mm along the whole length of its width of the steel plate 2 of 1200mm is applied on it with 9 at width from two laser beams 8 of each laser beam transmitter unit emission, with two cuts of formation on steel plate 2.In this case; From laser beam transmitter unit emitted laser bundle 9 are circular laser beam that diameter is about 25mm; And through toroidal reflectors 17; It is that 25mm, minor axis are the oval-shaped laser bundle of 8mm that the circular laser beam that said diameter is about 25mm converts major axis into, and through cylindrical mirror 5, is that 25mm, minor axis are that to convert major axis into be that 8mm, minor axis are the oval-shaped laser bundle of 0.2mm for the oval-shaped laser bundle of 8mm with said major axis.
Because in the steel plate translational speed is that 20mpm and cut interbody spacer are the result of the magnetic domain of refinement steel plate under the condition of 5mm; On steel plate, forming length is the continuous linear cut of 600mm; And can not form the cut of zigzag line pattern, and average iron loss improvement rate be 10%--this be good.In addition; Even when carrying out the process of refinement steel plate magnetic domain under the condition that in the steel plate translational speed is 30mpm, 50mpm, 80mpm; Also on steel plate, forming length is the continuous linear cut of 600mm; And can not form the cut of zigzag line pattern, and average iron loss improvement rate be 10% ± 2%--this also be good., visible according to the present invention, even under the high steel plate translational speed of 20～80mpm by these results to the refinement of steel plate magnetic domain, the also effective magnetic domain of refinement steel plate.
Fig. 5 illustrates and depends on that iron loss laser power, grain-oriented electrical steel sheet improves effect.In test, using magnetic flux density (B10) is 1.92 teslas, iron loss (W17/50) sample as 0.90watt/kg.The laser apparatus that in test, uses is carbonic acid gas (CO
2) laser apparatus, and the beam modality of said laser apparatus is a continuous-wave mode.From Fig. 5, can see, when laser power is 1.1Kw or when bigger, the iron loss improvement rate of steel plate is approximately 10%.And, can see, when laser power is 2.3Kw or when bigger, the iron loss improvement rate of steel plate is good, but the phenomenon that the coating on the steel plate is evaporated has appearred being formed on.Therefore, preferably the laser power scope is restricted to the scope of 1.0～2.2Kw, to show abundant thinning effect to the steel plate magnetic domain.
According to the present invention, the device that is used for the magnetic domain of refinement electrical sheet has noise and very for ease of maintenaince and repair slightly, thereby has reduced cost.And the coating that is formed on the electrical sheet is not damaged, and therefore need not apply again electrical sheet.
Claims (17)
1. a device that is used for the magnetic domain of refinement electrical sheet comprises an optical system, and said optical system comprises:
Be used to produce the laser beam transmitter unit of laser beam;
The switch mirror is used for receiving from said laser beam transmitter unit emitted laser bundle and then respectively transmitting said laser beam changes transmission direction simultaneously; And
A pair of scanning mirror is used to scan the laser beam that respectively transmits from said switch mirror and also then said laser beam respectively is applied to electrical sheet,
Wherein this is to scanning mirror left and right sides to-and-fro movement in opposite direction,
Wherein said switch mirror respectively is transferred to this to scanning mirror with said laser beam in the following manner: only when this moves with pre-determined direction in the scanning mirror each; Said laser beam is sent to this in the scanning mirror each; And when this during with the direction operation opposite with its traffic direction, blocks said laser beam in the scanning mirror each.
2. the device that is used for the magnetic domain of refinement electrical sheet according to claim 1 further comprises:
Toroidal reflectors; It is set between said laser beam transmitter unit and the said switch mirror; Said toroidal reflectors is used for converting the laser beam from said laser beam transmitter unit transmission into the oval-shaped laser bundle, and said oval-shaped laser bundle is transferred to said switch mirror; And
Cylindrical mirror; It is set at said electrical sheet top; Said cylindrical mirror is used for converting difform oval-shaped laser bundle into from this oval-shaped laser bundle to scanning mirror transmission, and said difform oval-shaped laser bundle is applied on the said electrical sheet.
3. the device that is used for the magnetic domain of refinement electrical sheet according to claim 1, wherein said device is provided with a plurality of optical systems, so that the irradiation range of laser beam on the width of electrical sheet is multiplied.
4. the device that is used for the magnetic domain of refinement electrical sheet according to claim 1, wherein this adheres on the copper bearing in the scanning mirror each, and said copper bearing is provided with microcapillary within it, flows through said copper bearing to allow water coolant.
5. the device that is used for the magnetic domain of refinement electrical sheet according to claim 1 wherein will be used for refrigerative nitrogen and be sprayed onto this each surface to scanning mirror, to cool off said scanning mirror and to prevent that said scanning mirror from being made dirty by dust.
6. the device that is used for the magnetic domain of refinement electrical sheet according to claim 1, the carbon dioxide laser that wherein has continuous-wave mode is damaged with the coating that prevents to be formed on the electrical sheet as laser apparatus.
7. the device that is used for the magnetic domain of refinement electrical sheet according to claim 2; Wherein speculum is arranged between said laser beam transmitter unit and the said toroidal reflectors, and said speculum is used for reflection lasering beam and institute's laser light reflected bundle is transferred to said toroidal reflectors.
8. the method for the magnetic domain of a refinement electrical sheet is wherein used the said electrical sheet of laser beam irradiation, thereby on said electrical steel, forms the cut that does not have the zigzag line pattern, and this method comprises:
The laser beam that the laser beam transmitter unit is produced is transferred to the switch mirror;
To respectively be transferred to the reciprocating scanning mirror in a pair of left and right sides in opposite direction from the laser beam of said switch mirror in the following manner; Change transmission direction simultaneously: only when this moves with pre-determined direction in the scanning mirror each; Said laser beam is sent to this in the scanning mirror each; And when this during with the direction operation opposite with its traffic direction, blocks said laser beam in the scanning mirror each;
Through on the scanning direction, respectively moving this to scanning mirror, with the said electrical sheet of said laser beam irradiation.
9. the method for the magnetic domain of refinement electrical sheet according to claim 8 further comprises:
Convert said laser beam into the oval-shaped laser bundle, with the axis that allows said oval-shaped laser bundle in the irradiation direction of said laser beam, thereby improve the irradiance rate of said laser beam.
10. the method for the magnetic domain of refinement electrical sheet according to claim 9 wherein is performed the operation that said laser beam converts the oval-shaped laser bundle into twice or more times, so that the shape of the luminous point of said laser beam is more tiny.
11. the method according to the magnetic domain of claim 9 or 10 described refinement electrical sheets wherein through said laser beam being transferred to curved surface toroidal reflectors or curved surface cylindrical mirror, converts said laser beam into the oval-shaped laser bundle.
12. an electrical sheet, it is coated with insulating film, and its magnetic domain is by refinement, and the width along said electrical sheet is formed with a plurality of cuts with laser beam above that,
The magnetic domain of wherein said electrical sheet is utilized each described device refinement among the claim 1-7,
Wherein on said electrical sheet, being formed with length is 300mm or longer continuous linear cut, and said insulating film is not damaged by said cut.
13. electrical sheet according to claim 12, wherein said electrical sheet is provided with the cut with zigzag line pattern.
14. electrical sheet according to claim 12, wherein said electrical sheet have 1000mm or bigger width, and are formed with one to four cut along its width above that.
15. according to the described electrical sheet of arbitrary claim in the claim 12～14, the refinement under 20mpm or higher steel plate translational speed of the magnetic domain of wherein said electrical sheet.
16. an electrical sheet, its magnetic domain are by refinement, the width along said electrical sheet is formed with a plurality of cuts with laser beam above that,
The magnetic domain of wherein said electrical sheet is utilized each described device refinement among the claim 1-7,
Wherein said electrical sheet has 1000mm or bigger width, and said electrical sheet is formed with one to four cut along its width above that.
17. electrical sheet according to claim 16, the refinement under 20mpm or bigger steel plate translational speed of the magnetic domain of wherein said electrical sheet.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070137828 | 2007-12-26 | ||
| KR1020070137828A KR100954796B1 (en) | 2007-12-26 | 2007-12-26 | Apparatus for miniaturizing magnetic domain with electromagnetic steel plate and electromagnetic steel plate manufactured theerof |
| KR10-2007-0137828 | 2007-12-26 | ||
| KR10-2008-0094113 | 2008-09-25 | ||
| KR1020080094113A KR101037160B1 (en) | 2008-09-25 | 2008-09-25 | Apparatus and method for miniaturizing magnetic domain with electromagnetic steel plate |
| KR1020080094113 | 2008-09-25 | ||
| KR10-2008-0117521 | 2008-11-25 | ||
| KR1020080117521A KR101051746B1 (en) | 2008-11-25 | 2008-11-25 | Magnetic micronization method of electrical steel sheet and magnetic micronized steel sheet |
| KR1020080117521 | 2008-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101492765A CN101492765A (en) | 2009-07-29 |
| CN101492765B true CN101492765B (en) | 2012-06-20 |
Family
ID=40923554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101892477A Active CN101492765B (en) | 2007-12-26 | 2008-12-26 | Apparatus and method for refining magnetic domain of electrical steel sheet |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100954796B1 (en) |
| CN (1) | CN101492765B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831538B (en) * | 2010-05-06 | 2011-12-21 | 上海大学 | Method for reducing iron loss of oriented silicon steel by utilizing ultrasonic waves |
| KR101286246B1 (en) | 2010-12-27 | 2013-07-15 | 주식회사 포스코 | Apparatus and method for miniaturizing magnetic domain of a grain-oriented electrical steel sheets |
| KR101286247B1 (en) | 2010-12-27 | 2013-07-15 | 주식회사 포스코 | Apparatus and method for refining magnetic domain of a grain-oriented electrical steel sheets |
| KR101638890B1 (en) | 2011-12-27 | 2016-07-12 | 제이에프이 스틸 가부시키가이샤 | Device to improve iron loss properties of grain-oriented electrical steel sheet |
| US10804015B2 (en) | 2011-12-29 | 2020-10-13 | Posco | Electrical steel sheet and method for manufacturing the same |
| KR101370634B1 (en) * | 2011-12-29 | 2014-03-07 | 주식회사 포스코 | Grain-oriented electrical steel sheet and method for manufacturing the same |
| KR101562962B1 (en) * | 2014-08-28 | 2015-10-23 | 주식회사 포스코 | Method and appratus for refining magnetic domains in grain-oriented electrical steel sheet and grain-oriented electrical steel manufactured using the same |
| KR101758517B1 (en) * | 2015-12-23 | 2017-07-14 | 주식회사 포스코 | Heat treatment apparatus and method for steel strip |
| KR102148383B1 (en) * | 2016-01-22 | 2020-08-26 | 주식회사 포스코 | Method and apparatus for refining magnetic domains grain-oriented electrical steel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0852578A (en) * | 1994-08-09 | 1996-02-27 | Ushio Inc | Laser marking device and its method |
| JP2720811B2 (en) * | 1995-03-15 | 1998-03-04 | 住友電気工業株式会社 | Laser focusing method and apparatus |
| JPH11347758A (en) | 1998-06-10 | 1999-12-21 | Mitsubishi Heavy Ind Ltd | Super precision machining device |
| JP3458759B2 (en) * | 1999-04-02 | 2003-10-20 | 株式会社村田製作所 | Processing method of ceramic green sheet |
-
2007
- 2007-12-26 KR KR1020070137828A patent/KR100954796B1/en active IP Right Grant
-
2008
- 2008-12-26 CN CN2008101892477A patent/CN101492765B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090069982A (en) | 2009-07-01 |
| CN101492765A (en) | 2009-07-29 |
| KR100954796B1 (en) | 2010-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101492765B (en) | Apparatus and method for refining magnetic domain of electrical steel sheet | |
| JP5606923B2 (en) | Magnetic domain refinement apparatus and method for grain-oriented electrical steel sheet | |
| RU2509163C1 (en) | Texture sheet of electric steel and method of its production | |
| KR101681822B1 (en) | Grain-oriented electrical steel sheet and manufacturing method therefor | |
| CN101896626B (en) | Method for manufacturing grain-oriented electromagnetic steel sheet whose magnetic domains are controlled by laser beam application | |
| JPH0136531B2 (en) | ||
| US6437284B1 (en) | Optical system and apparatus for laser heat treatment and method for producing semiconductor devices by using the same | |
| US8779327B2 (en) | Laser scribe processing method | |
| CN101979676B (en) | Method for improving magnetic property of oriented silicon steel through laser scribing | |
| EP0140663A1 (en) | Optical scanning system for laser treatment of electrical steel and the like | |
| KR101440597B1 (en) | Oriented electrical steel sheets and method for manufacturing the same | |
| CA2076747C (en) | Cooling drum for casting thin cast pieces and method and apparatus for forming dimples in peripheral surface of the drum | |
| US20140374137A1 (en) | Electrical Steel Sheet and Method for Manufacturing the Same | |
| RU2548544C2 (en) | Method of fast laser denting | |
| CN101666912B (en) | Widening device of high-power laser beam and method thereof | |
| CN104808343B (en) | A kind of laser annealing dodging device | |
| JPH0619112B2 (en) | Method for improving iron loss value of electrical steel sheet | |
| KR101051746B1 (en) | Magnetic micronization method of electrical steel sheet and magnetic micronized steel sheet | |
| JP6482671B2 (en) | Method and apparatus for forming grooves on steel sheet surface | |
| KR101037160B1 (en) | Apparatus and method for miniaturizing magnetic domain with electromagnetic steel plate | |
| CN201589892U (en) | Widening device of high-power laser beam | |
| CN114221208B (en) | Nanometer array preparation system and nanometer array preparation method | |
| JPH0790385A (en) | Grain-oriented silicon steel sheet excellent in magnetic property | |
| CN201532496U (en) | High-power laser beam widening device | |
| JP4227388B2 (en) | Method for producing grain-oriented electrical steel sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Seoul, South Kerean Patentee after: POSCO Holdings Co.,Ltd. Address before: Gyeongbuk Pohang City, South Korea Patentee before: POSCO |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230529 Address after: Gyeongbuk, South Korea Patentee after: POSCO Co.,Ltd. Address before: Seoul, South Kerean Patentee before: POSCO Holdings Co.,Ltd. |
|
| TR01 | Transfer of patent right |