CN102969140A - EI-type magnetic core production method and air gap cutting equipment - Google Patents
EI-type magnetic core production method and air gap cutting equipment Download PDFInfo
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- CN102969140A CN102969140A CN2012102188586A CN201210218858A CN102969140A CN 102969140 A CN102969140 A CN 102969140A CN 2012102188586 A CN2012102188586 A CN 2012102188586A CN 201210218858 A CN201210218858 A CN 201210218858A CN 102969140 A CN102969140 A CN 102969140A
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Abstract
The invention relates to the field of EI-type magnetic core production and provides an EI-type magnetic core production method and air gap cutting equipment used for forming air gaps in the method. The EI-type magnetic core production method comprises the following steps of: firstly fabricating an integral magnetic core blank with two wire installation grooves, then sintering a magnetic core accessory and finally cutting two air gaps on the blank. The air gap cutting equipment comprises an equipment body and a transverse feeding mechanism. The equipment body is provided with a stand column. The stand column is provided with a longitudinal cantilever. The longitudinal cantilever is provided with two cutting units which are distributed along the extension direction of the longitudinal cantilever. Each cutting unit comprises a cutter and a driving mechanism which is used for driving the cutter, wherein the cutter comprises a cutting blade. The EI-type magnetic core production method and the air gap cutting equipment solve the problems that the production processes are manyultiple, the rate of non-defective products is low, the shape tidiness of the produced magnetic cores is poor, the inductance value of the magnetic cores is low and the stability is poor in the existing EI-type magnetic core production method.
Description
Technical field
The production method of EI type magnetic core and air gap cutting equipment
Background technology
EI type magnetic core has comparatively widely to be used, such as all adopting this kind structure at SMD transformer, inductance core etc.The method of existing production EI type magnetic core is, produce respectively first as shown in Figure 2 E type magnetic sheet 1 and I type magnetic sheet 2 as shown in Figure 3.Referring to Fig. 2, E type magnetic sheet 1 is provided with two wire mounting groove 11 and two air-gap surfaces 12 of extending three faces of full E type magnetic sheet 1.Referring to Fig. 1, then adopt bonding agent that E type magnetic sheet 1 and I type magnetic sheet 2 are bonded together formation EI type magnetic core.Surround two air gaps 13 between two air-gap surfaces 12 and the I type magnet.For smooth need that guarantees E type magnetic sheet and the bonding plane of I type magnetic sheet increases the plain grinding manufacturing procedure, so production process is loaded down with trivial details.Because the I magnetic sheet that causes in the sintering process and the distortion of air-gap surface 12, air gap 13 undesirable defective productss produced when meeting generation E type magnetic sheet was bonded together with I type magnetic sheet, because operation is many, and each procedure all can produce certain learies, the yields of product is low simultaneously.Why will adopt this kind mode of production mainly is in order to make things convenient for the processing of air-gap surface 12 in the E shape magnetic sheet.When producing by this kind mode, because E type magnetic sheet and I type magnetic sheet are to link together by the mode that bonds, can cause that EI type magnetic core outward appearance is irregular, there are the problems such as tomography in magnet, the magnet tomography makes easily the magnet magnetic saturation and generates heat, so that the inductance value of magnetic core descends the poor stability of magnet magnetic characteristic.
Number be 2009101530293 in Chinese patent application, date of publication be Mays 12 in 2010 day, be called the equipment that discloses the air-gap surface on a kind of E of making type magnetic sheet in the patent documentation of " a kind of mill magnetic core with two air gap bistrique passing through type grinders ".
Be 921136722 in China Patent No., open day be September 1 in 1993 day, be called the application that discloses in the patent documentation of " grinding transformer " about EI type magnetic core.
Summary of the invention
The invention provides a kind of production method of EI type magnetic core and be used to form in the method the air gap cutting equipment of air gap, solved the problem that the outward appearance regularity inductance value poor and magnetic core of the magnetic core that the existing production process of production method is many, yields is low and produced of existing EI type magnetic core hangs down poor stability.
Above technical problem solves by following technical proposal: a kind of production method of EI type magnetic core, the first step, produce the magnetic core blank of the integrative-structure with two wire mounting grooves; Second step, the magnetic core blank is carried out sintering and makes the magnetic core semi-finished product; The 3rd goes on foot, cuts out two air gaps and make EI type magnetic core at the magnetic core semi-finished product.Do not have the blank that air gap has a wire mounting groove and carry out sintering by producing first, sinter again by the mode of cutting at blank and to produce air gap, can avoid owing to scrapping that sintering warpage causes that the undesirable phenomenon of air gap produces, because the operation of having reduced the number of the operation process is so the yields of product is high.The EI type magnetic core of producing by this operation is structure as a whole, and can not occur that the inductance value that causes because of tomography descends and the problem of magnetic core magnetic characteristic poor stability.
As preferably, in the 3rd step, cut out two air gaps in the maintenance magnetic core semi-finished product constant mode in position constant with respect to the position of feed mechanism and the maintenance cutter unit.Article two, air gap synchronous cutting, the efficient when not only cutting out air gap is high, the convenience during cutting is good, and the accuracy of the relative position between two air gaps that cut out good, be not easy to produce owing to the undesirable phenomenon of scrapping of air gap relative position.Remove to cut another air gap if change again the position of magnetic core semi-finished product or cutting tool behind the well cutting one air gap, inconvenience when then not only cutting, also can increase the error of two relative positions between the air gap, thereby can produce the undesirable and phenomenon of scrapping of air gap relative position.
As preferably, in the first step, width also is set greater than " V " shape feed guiding groove of width of air gap in two relative sides of magnetic core blank.To make things convenient for accurately entering of cutting blade in the air gap course of processing.Improve the accuracy of gap position.Can not cause the breakage on EI magnetic core surface during feed, guarantee the planarization of product appearance.
A kind of air gap cutting equipment, comprise fuselage and transverse feed mechanism, fuselage is provided with column, column is provided with vertical cantilever, vertically cantilever is provided with the cutter unit of two longitudinally cantilever bearing of trend distributions, cutter unit comprises cutting tool and drives the driving mechanism of cutting tool that cutting tool comprises cutting blade; During cutting, the cutting blade in two cutting tools is in the same plane, the spacing distance between the cutting blade in two cutting tools is less than the spacing distance between two air gaps on the EI type magnetic core.During use, the magnetic core semi-finished product are installed on the transverse feed mechanism, the position of adjustment cutting blade makes cutting blade and the feed guiding groove is in the same plane, make the magnetic core semi-finished product between the cutting blade of two cutting tools, cutting blade rotation during then by driving mechanism, transverse feed mechanism drives the magnetic core semi-finished product and passes between two cutting tools, and the cutting blade synchronous cutting on the magnetic core semi-finished product on two cutting tools goes out two air gaps.
As preferably, described transverse feed mechanism comprises transversely movable cross slide, and cross slide is provided with magnechuck and position block.Power to magnechuck during use, on the magnetic conduction supporting seat, and it is mobile to prevent that EI type magnetic core position to be cut in the cutting process from producing with EI type magnetic core magnetic absorption to be cut for magnechuck.Loading and unloading are convenient and strength-saving during magnetic core, can not produce hurt to the magnetic core surface.Can cut continuously at a plurality of magnetic cores of the consistent proper alignment of magnetic conduction sucker during charging, a plurality of magnetic cores are carried out continuous feed, to improve cutting efficiency.
Described magnechuck is provided with the magnetic conduction supporting seat, and the cross section of described magnetic conduction supporting seat is " protruding " font, and position block is arranged on the shoulder of magnetic conduction supporting seat.This design can be given the feed motion vacating space of cutting tool under the prerequisite that keeps compact conformation.
As preferably, described position block is that permeability magnetic material is made.Can improve the fixed effect to magnetic core.
As preferably, described driving mechanism comprises drive motors and the motor mount that is connected on vertical cantilever, motor mount is provided with motor containing hole, opening, spreading groove and is used for closing up the screwed hole that the spreading groove is used, opening and spreading groove are positioned at the both sides of motor containing hole and combine as a whole with the motor containing hole, and drive motors is located in the motor containing hole and by bolt and cooperates described screwed hole to be fixed together with motor mount.The method of motor mount fixed drive motor is: unclamp first bolt, drive motors is located in the motor installing hole, clamping screw then, the spreading groove closes up in the process of clamping screw, so that the motor installing hole closes up together, thereby so that motor mount hold tightly on drive motors.Convenient when quality of fit height and loading and unloading drive motors.
As preferably, the side face of described cutting blade is provided with some cooling fluid lead-in grooves that circumferentially distribute along cutting blade.The importing of cooling water when being convenient to cut.Effective when cutting blade is cooled off.
As preferably, described vertical cantilever liftably is connected on the described column, also is provided with balancing weight on described vertical cantilever, and balancing weight and cutter unit are positioned at the both sides of column.The position of cutting blade is with the half-finished air gap height coupling of magnetic core when coming by the height that changes vertical cantilever, and versatility is good.The moment that can make vertical cantilever be positioned at the both sides of column simultaneously is able to balance, is conducive to guarantee that cutting blade is with the half-finished depth of parallelism of magnetic core.The accuracy of the position of the air gap that cuts out is good.Vertically the lifting of cantilever can be adopted the modes such as chain lifting, hydraulic lifting.
The present invention has following advantage, by EI type magnetic core is one-body molded and behind sintering, cut out again air gap, can avoid owing to scrapping that sintering warpage causes that the undesirable phenomenon of air gap produces, simultaneously also evaded the technical barrier that deeply causes mould to make because of the too little degree of depth of width of air gap, so that production process is minimized, the yields of product is improved, the inductance value decline that causes because of tomography and the problem of magnetic core magnetic characteristic poor stability can not occur.The air gap cutting equipment can carry out synchronous cutting to two air gaps, convenience and yields during the further production that improves.
Description of drawings
Fig. 1 is the structural representation of existing EI type magnetic core.
Fig. 2 is the structural representation of existing E type magnetic sheet.
Fig. 3 is the structural representation of existing I type magnetic sheet.
Fig. 4 is the structural representation of magnetic core blank of the present invention.
Fig. 5 is the structural representation of EI type magnetic core of the present invention.
Fig. 6 is the local enlarged diagram at the A place of Fig. 5.
The front elevational schematic of Fig. 7 air gap cutting equipment of the present invention.
Fig. 8 is the schematic top plan view of motor mount of the present invention.
Fig. 9 be among Fig. 7 cutter unit and vertically B-the B of cantilever analyse and observe enlarged diagram.
Figure 10 is the perspective view of cutting tool of the present invention.
Figure 11 is the annexation schematic diagram between vertical cantilever and the column.
Figure 12 is the local enlarged diagram of the use state of air gap cutting equipment of the present invention.
Figure 13 is the schematic top plan view when loading the magnetic core semi-finished product by transverse feed mechanism.
Among the figure: E type magnetic sheet 1, wire mounting groove 11, air-gap surface 12, air gap 13, feed guiding groove 14, I type magnetic sheet 2, magnetic core blank 3, fuselage 4, vertical planker 41, vertical planker rocking handle 42, column 43, transverse feed mechanism 5, horizontal supporting plate control switch 51, cross slide 52, magnechuck 53, magnetic conduction supporting seat 54, the right shoulder 541 of magnetic conduction supporting seat, position block 55, vertical cantilever 6, screw mandrel mounting panel 61, vertical screw mandrel 62, cutter unit moves rocking handle 63, vertical hair bar 64, plane bearing 65, vertical cantilever drive nut 66, driven angular wheel 67, vertically cantilever elevation rocking handle 68, drive link 69, initiative taper generating gear 60, cutter unit 7, cutting tool 71, blade driving shaft 711, decide flange 712, moving flange 713, cutting blade 714, cooling fluid lead-in groove 7141, insert retention nut 715, driving mechanism 72, sliding seat 721, motor mount 722, motor containing hole 7221, opening 7222, spreading groove 7223, the first screwed hole 7224, the second screwed hole 7225, stress disappear and end groove 7226, drive motors 723, motor power output shaft 7231, set lever 724, bolt 725, sliding seat drive nut 726, balancing weight 8, magnetic core semi-finished product 9, the width H1 of feed guiding groove, the width H2 of air gap, spacing distance H4 between the spacing distance H3 between the cutting blade in two cutting tools, two air gaps.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Referring to Fig. 7, a kind of air gap cutting equipment comprises fuselage 4.Fuselage 4 is provided with vertical planker 41, vertical planker rocking handle 42, horizontal supporting plate control switch 51, vertical cantilever elevation rocking handle 68 and column 43.Vertical planker 41 is provided with transverse feed mechanism 5.
Transverse feed mechanism 5 comprises can be along laterally (namely among the figure perpendicular to the direction of paper) mobile being arranged on cross slide 52 on the vertical planker 41, being fixed on magnechuck 53 on the cross slide 52, being arranged on magnetic conduction supporting seat 54 and position block 55 on the magnechuck 53.Magnechuck 53, magnetic conduction supporting seat 54 and position block 55 all are to be the strip of horizontal expansion along fore-and-aft direction.The cross section of magnetic conduction supporting seat 54 is " protruding " font.Position block 55 is arranged on the right shoulder 541 of magnetic conduction supporting seat.Position block is arranged on the side towards column, and is convenient during loading and unloading magnetic core semi-finished product.Position block 55 is iron forming, and certainly making of other permeability magnetic material can.
It is vertical cantilever 6 of longitudinal extension that column 43 is provided with along left and right directions.Vertically cantilever 6 is provided with two cutter units 7 and balancing weight 8.Balancing weight 8 is positioned at the right side of column 43.Cutter unit 7 is positioned at the left side of column 43.Cutter unit 7 is distributed on the vertical cantilever 6 along left and right directions.Vertically the left part of cantilever 6 is welded with screw mandrel mounting panel 61.The vertical screw mandrel 62 that is threaded on the screw mandrel mounting panel 61 and extends along left and right directions.The left end of vertical screw mandrel 62 is connected with cutter unit and moves rocking handle 63.
Cutter unit 7 comprises cutting tool 71 and driving mechanism 72.
Referring to Fig. 8, the stress that motor mount 722 is provided with motor containing hole 7221, opening 7222, spreading groove 7223, the first screwed hole 7224, the second screwed hole 7225 and the is positioned at spreading groove 7223 ends only groove 7226 that disappears.Opening 7222 and spreading groove 7223 are positioned at the left and right sides of motor containing hole 7221 and join together with motor containing hole 7221.In conjunction with Fig. 7, cooperate the second screwed hole 7225 to be locked together by bolt between sliding seat 721 and the motor mount 722.Drive motors 723 is located in the motor containing hole 7221 and by bolt 725 and cooperates the first screwed hole 7224 to be fixed together with motor mount 722.
Referring to Fig. 9, be positioned in two sliding seats 721 on that sliding seat of left and be welded with sliding seat drive nut 726.Vertical screw mandrel 62 is threaded on the sliding seat drive nut 726.Cutting tool 71 comprise the upper end with the motor power output shaft 7231 coaxial blade driving shafts 711 that are fixed together, be fixed on blade driving shaft 711 lower ends decide flange 712, with decide the supporting moving flange 713 of flange 712, be clamped in decide the cutting blade 714 between flange 712 and the moving flange 713 and be threaded in blade driving shaft 711 hypomeres be used for making the insert retention nut 715 of deciding flange 712 and moving flange 713 clamping cutting blades 714.
Referring to Figure 10, the side face of cutting blade 714 is provided with 16 cooling fluid lead-in grooves 7141 that circumferentially distribute along cutting blade.
Referring to Figure 11, column 43 is hollow structure.Be hung with vertical hair bar 64 in the column 43.Vertical hair bar 64 is provided with plane bearing 65 with the junction of column 43.Vertically cantilever 6 is provided with the vertical cantilever drive nut 66 that matches with vertical hair bar 64.The lower end of vertical hair bar 64 is provided with driven angular wheel 67.Vertically cantilever elevation rocking handle 68 is connected to the left end of drive link 69.The right-hand member of drive link 69 is provided with the initiative taper generating gear 60 that is engaged on the driven angular wheel 67.
A kind of production method of EI type magnetic core,
Referring to Fig. 4, the first step, produce the magnetic core blank 3 of the integrative-structure with two wire mounting grooves 11.Respectively being provided with one on the left and right side of magnetic core blank 3 is " V " shape feed guiding groove 14 of the length direction extension of magnetic core blank along fore-and-aft direction.
Second step, magnetic core blank 3 is carried out sintering and makes the magnetic core semi-finished product.
Referring to Fig. 5, the 3rd step, cut out two air gaps 13 and make the EI type magnetic core of integrative-structure at the magnetic core semi-finished product.
Referring to Fig. 6, the width H1 of feed guiding groove is greater than the width H2 of air gap.
To carry out operation by above-mentioned air gap cutting equipment when cutting air gap in the 3rd step.The concrete grammar that cuts out air gap by air gap cutting equipment of the present invention is:
Referring to Figure 13, with 12 magnetic core semi-finished product 9 along the fore-and-aft direction word order on magnetic conduction supporting seat 54, the right flank of magnetic core semi-finished product 9 is with position block 55 snaps, give the magnetic conduction sucker 53 power supplies, under the effect of magnetic conduction sucker 53 magnetic force, magnetic core semi-finished product 9 and magnetic conduction supporting seat 54 be absorbed and fixed at together, under the effect of magnetic core semi-finished product 9 self magnetic force, magnetic core semi-finished product 9 are fixed together with position block 55.
Referring to Fig. 7, unclamp bolt 725, the cutting blade 714 in upper-lower position to two cutting tool 71 of adjustment cutting tool 71 is in the same plane.
Referring to Figure 11, rotate vertical cantilever elevation rocking handle 68,69 rotations of vertical cantilever elevation rocking handle 68 drive drive links, 60 rotations of drive link 69 drive initiative taper generating gears, driven angular wheel 67 rotations of initiative taper generating gear 60 drives, 64 rotations of driven angular wheel 67 drive vertical hair bars, vertical cantilever drive nut 66 liftings of vertical hair bar 64 drives, vertical cantilever 6 liftings of vertical cantilever drive nut 66 drivings.
Referring to Figure 12, when vertical cantilever elevation enters together the lifting that then stops vertical cantilever when guiding groove 14 aligns to cutting blade 714.
Referring to Fig. 7 and in conjunction with Fig. 9 and Figure 12, unclamp the set lever 724 on that cutter unit that is positioned at the left side in two cutter units 7, the rotation cutter unit moves rocking handle 63, cutter unit moves rocking handle 63 and cooperates 726 drivings of sliding seat drive nuts to be positioned at that cutter unit move left and right on vertical cantilever 6 in left side by vertical screw mandrel 62.When moving to two spacing distance H3 between the cutting blade in the cutting tool less than the spacing distance H4 between two air gaps on the EI type magnetic core, the cutter unit that stops operating moves rocking handle 63, locking set lever 724.
Referring to Fig. 7 and in conjunction with Figure 12, drive vertical planker 41 move left and right by vertical planker rocking handle 42, when moving to magnetic core semi-finished product 9 when being positioned at the middle of two cutting blades 714, stop to shake vertical planker rocking handle 42.The mode that vertical planker rocking handle 42 drives vertical planker 41 is identical with the mode that above-mentioned cutter unit moves rocking handle 63 driving cutter units.
Referring to Fig. 7 and Figure 13, start horizontal trailing arm CD-ROM drive motor (not drawing among the figure) by horizontal supporting plate control switch 51, so that feed mechanism 5 according to the C among Figure 13 to movement, when all magnetic core semi-finished product 9 on being positioned at feed mechanism 5 all passed through cutting tool 71, the cutting blade 714 on the cutting tool 71 cut out two air gaps 13 at magnetic core semi-finished product 9.When cutting out two air gaps by this equipment, be not change the magnetic core semi-finished product relative to cutting out with the position of feed mechanism and the mode that do not move the position of cutter unit, not only efficient is high, and quality better.In cutting process, also to carry cooling fluid to the surface of cutting blade 714 by cooling fluid conveying device (not drawing among the figure).
Another does not draw among the embodiment of figure, and horizontal supporting plate 52 is by manually dragging.
Claims (10)
1. the production method of an EI type magnetic core is characterized in that, the first step, produces the magnetic core blank of the integrative-structure with two wire mounting grooves; Second step, the magnetic core blank is carried out sintering and makes the magnetic core semi-finished product; The 3rd goes on foot, cuts out two air gaps and make EI type magnetic core at the magnetic core semi-finished product.
2. the production method of EI type magnetic core according to claim 1 is characterized in that, cuts out two air gaps in the maintenance magnetic core semi-finished product constant mode in position constant with respect to the position of feed mechanism and the maintenance cutter unit in the 3rd step.
3. the production method of EI type magnetic core according to claim 1 and 2 is characterized in that, in the first step, width also is set greater than " V " shape feed guiding groove of width of air gap in two relative sides of magnetic core blank.
4. the air gap cutting equipment in the production method that is applicable to EI type magnetic core as claimed in claim 1, it is characterized in that, comprise fuselage and transverse feed mechanism, fuselage is provided with column, column is provided with vertical cantilever, vertically cantilever is provided with the cutter unit of two longitudinally cantilever bearing of trend distributions, and cutter unit comprises cutting tool and drive the driving mechanism of cutting tool that cutting tool comprises cutting blade; During cutting, the cutting blade in two cutting tools is in the same plane, the spacing distance between the cutting blade in two cutting tools is less than the spacing distance between two air gaps on the EI type magnetic core.
5. air gap cutting equipment according to claim 4 is characterized in that, described transverse feed mechanism comprises transversely movable cross slide, and cross slide is provided with magnechuck and position block.
6. air gap cutting equipment according to claim 5 is characterized in that, described magnechuck is provided with the magnetic conduction supporting seat, and the cross section of described magnetic conduction supporting seat is " protruding " font, and position block is arranged on the shoulder of magnetic conduction supporting seat.
7. air gap cutting equipment according to claim 6 is characterized in that, described position block is that permeability magnetic material is made.
8. according to claim 4 or 5 or 6 or 7 described air gap cutting equipments, it is characterized in that, described driving mechanism comprises drive motors and the motor mount that is connected on vertical cantilever, motor mount is provided with motor containing hole, opening, spreading groove and is used for closing up the screwed hole that the spreading groove is used, opening and spreading groove are positioned at the both sides of motor containing hole and combine as a whole with the motor containing hole, and drive motors is located in the motor containing hole and by bolt and cooperates described screwed hole to be fixed together with motor mount.
9. according to claim 4 or 5 or 6 or 7 described air gap cutting equipments, it is characterized in that the side face of described cutting blade is provided with some cooling fluid lead-in grooves that circumferentially distribute along cutting blade.
10. according to claim 4 or 5 or 6 or 7 described air gap cutting equipments, it is characterized in that described vertical cantilever liftably is connected on the described column, also be provided with balancing weight on described vertical cantilever, balancing weight and cutter unit are positioned at the both sides of column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210218858.6A CN102969140B (en) | 2012-06-29 | 2012-06-29 | EI-type magnetic core production method and air gap cutting equipment |
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| CN201210218858.6A CN102969140B (en) | 2012-06-29 | 2012-06-29 | EI-type magnetic core production method and air gap cutting equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186265A (en) * | 2017-06-17 | 2017-09-22 | 彭波 | A kind of cutter device of double workpiece |
| CN108273638A (en) * | 2018-03-21 | 2018-07-13 | 江西尚朋电子科技有限公司 | A kind of soft magnetic core diced system |
| CN108788308A (en) * | 2017-05-04 | 2018-11-13 | 浙江宁巍机械科技有限公司 | A kind of full-automatic formwork cutting machine of double-station |
| CN110160693A (en) * | 2019-07-08 | 2019-08-23 | 无锡集磁科技有限公司 | The measuring method of orientation silicon steel magnetic core resin solidification stress |
| CN110281404A (en) * | 2019-05-16 | 2019-09-27 | 湖南艾迪奥电子科技有限公司 | A kind of Multi-wire cutting device of magnetic core |
| CN110465693A (en) * | 2019-06-25 | 2019-11-19 | 浙江尚品店配信息科技有限公司 | A kind of cutting means for clothes showing shelf crossbeam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108788308A (en) * | 2017-05-04 | 2018-11-13 | 浙江宁巍机械科技有限公司 | A kind of full-automatic formwork cutting machine of double-station |
| CN107186265A (en) * | 2017-06-17 | 2017-09-22 | 彭波 | A kind of cutter device of double workpiece |
| CN108273638A (en) * | 2018-03-21 | 2018-07-13 | 江西尚朋电子科技有限公司 | A kind of soft magnetic core diced system |
| CN110281404A (en) * | 2019-05-16 | 2019-09-27 | 湖南艾迪奥电子科技有限公司 | A kind of Multi-wire cutting device of magnetic core |
| CN110465693A (en) * | 2019-06-25 | 2019-11-19 | 浙江尚品店配信息科技有限公司 | A kind of cutting means for clothes showing shelf crossbeam |
| CN110160693A (en) * | 2019-07-08 | 2019-08-23 | 无锡集磁科技有限公司 | The measuring method of orientation silicon steel magnetic core resin solidification stress |
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| Publication number | Publication date |
|---|---|
| CN102969140B (en) | 2014-12-31 |
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