CN103123863A - Preparation device for radial orientation permanent magnet ring - Google Patents

Preparation device for radial orientation permanent magnet ring Download PDF

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Publication number
CN103123863A
CN103123863A CN2013100594946A CN201310059494A CN103123863A CN 103123863 A CN103123863 A CN 103123863A CN 2013100594946 A CN2013100594946 A CN 2013100594946A CN 201310059494 A CN201310059494 A CN 201310059494A CN 103123863 A CN103123863 A CN 103123863A
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China
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magnetic pole
motion
die cavity
magnetic
portable plate
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CN2013100594946A
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CN103123863B (en
Inventor
董生智
张有章
马世光
陈必成
姚彦军
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Changzhou Longci Material Technology Co ltd
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ORIENT MAGNET TECHNOLOGY (OMT) Co Ltd
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Abstract

The invention relates to a preparation device for a radial orientation permanent magnet ring. An outer magnetic pole is fixed on an outer magnetic pole connection support, and the thickness of the outer magnetic pole is far smaller than the height of a mold cavity. When exciting current passes through a coil, a radial magnetic field is generated in a ranged space of the mold cavity between a core rod and the outer magnetic pole, powder materials in the mold cavity are pushed by an oil cylinder to move vertically in a reciprocating mode, and therefore the power materials sequentially and circularly pass through the plane where the outer magnetic pole is located when the powder materials are pressed. When all the power materials sequentially and repeatedly pass through the plane where the outer magnetic pole is located and are pressed, the powder materials in a whole mold can be fully and uniformly oriented, radial orientation uniformity of the radial permanent magnet ring is greatly improved, meanwhile, axial uniformity of orientation degrees can also be improved, and the advantage is obvious especially for high radial rings. Besides, according to the preparation device for the radial orientation permanent magnet ring, the methods of manual mold release and automatic mold release can be adopted, operation is flexile, and the qualification rate of the pressed radial rings is greatly improved.

Description

A kind of preparation facilities of permanent-magnetic ring of radial orientation
Technical field
The present invention relates to the manufacturing field of permanent-magnetic clamp, especially a kind of preparation facilities of permanent-magnetic ring of radial orientation.
Background technology
The first is that application number is that the employing magnetic pole principle of same-sex repulsion of mentioning in 200510086882.9 produces radially oriented magnetic field.Radiation field is to be produced by a pair of homopolarity electromagnet, the direct current of each electromagnet or pulse current produce the N utmost point or the S utmost point, the magnetic line of force that repels each other due to the identical generation of polarity of two electromagnet, in pressing process, two homopolarity magnetic heads are moved to the die cavity direction simultaneously, make it form a radiation field by the magnetic conduction mould.The method makes annular magnetic get to a certain extent guarantee in the uniformity of circumferencial direction, but annulus is very poor in the uniformity of short transverse, and maximum weak point is can greatly reduce when alignment magnetic field that the internal diameter of radial ring hour obtains in addition.Adopt automatic Magnetic field press such as the patent No. 02203908.2 and the patent No. 01219246.5 of this method preparation.
The second is that the segmentation orientation is made permanent-magnetic clamp such as application number is 200710106670.1: along the circumferential direction segmentation of annulus is orientated, each section is imported respectively magnetic field to be orientated, though the method has realized radial orientation, along the circumferential direction the degree of orientation is inhomogeneous but cause annulus.The inhomogeneous whole magnetic performance that not only can have a strong impact on radial ring of the degree of orientation, and can cause the different orientation degree position shrinkage in sintering process different and cause stress to be concentrated more serious makes radial ring opening.
The third is mentioned for application number 200910201694.4 and utilizes the alignment magnetic field that produces rotation by the alternating current of electromagnet, thereby realize that rotating magnetic field is orientated annular magnetic, can realize strength, magnetic field successively rotation sweep cross every part of magnet, reduced kinematic pair, but there is inhomogeneities in magnet orientation along the circumferential direction.
Summary of the invention
The technical problem to be solved in the present invention is: the preparation facilities that a kind of permanent-magnetic clamp that can obtain to be orientated preferably in radial magnetic field is provided.
the technical solution adopted for the present invention to solve the technical problems is: a kind of preparation facilities of permanent-magnetic ring of radial orientation, comprise the upper of press, sill, produce the line bag in magnetic field, the press column, upper cylinder, lower oil cylinder, frame, annular magnetic conductive board as outer magnetic pole, the outer magnetic pole connection bracket of magnetic conduction, the portable plate of auxiliary cylinder and a support structure is or/and fixed head, the die cavity outer wall, as the plug of magnetic conduction in the die cavity of internal magnetic pole and non-magnetic on, lower punch, fixing outer magnetic pole on described outer magnetic pole connection bracket, the thickness of outer magnetic pole is much smaller than the height of die cavity, when being connected with exciting current in the line bag, produce radial magnetic field in the ranged space of the die cavity between plug and outer magnetic pole, powder in die cavity back and forth moves up and down under the promotion of oil cylinder, make powder cycle through successively the plane at outer magnetic pole place in compacting.
The line bag in generation of the present invention magnetic field is separately positioned on the upper and lower of press; The upper and lower of press arranges respectively envelope curve and/or lower envelope curve.Described die cavity outer wall is annular, is fixed on portable plate or fixed head; The die cavity outer wall can be the unitary construction of single annular, also can be spliced by the tile of a plurality of arcs.The motion of annular die cavity outer wall is to realize by the cylinder movement that portable plate or fixed head connect.
The motion of upper and lower punch of the present invention is realized by cylinder movement, the motion of upper male mould is moved to realize by upper cylinder, lower punch is fixed on portable plate or fixed head, and the motion that is fixed on the lower punch on portable plate is that the motion by auxiliary cylinder realizes.Motion as the internal magnetic pole plug is controlled by lower oil cylinder or auxiliary cylinder, and ejects after adding powder, and compacting finishes backward lower motion and sloughs plug.
Belong between entablature of the present invention and press column and outer magnetic pole connecting struts and be slidably connected, and when orientation drives when driving the portable plate of die cavity motion or orientation to belong between the portable plate of lower punch motion and is rigidly connected, and its motion is realized by the motion of auxiliary cylinder or lower oil cylinder.
The invention has the beneficial effects as follows: due to outer magnetic pole thickness powder height in the die cavity, make form relatively between outer magnetic pole and internal magnetic pole concentrate, radial magnetic field that intensity is higher.When the process of the powder in die cavity plane, outer magnetic pole place, can obtain to be orientated preferably in above-mentioned radial magnetic field.Along with all powders order and the plane by the outer magnetic pole place and when obtaining compacting repeatedly, powder in whole mould can obtain fully, be orientated uniformly, improved greatly the radial orientation uniformity of radial permanent magnetic ring, also improved simultaneously degree of orientation uniformity in the axial direction, particularly for highly higher radial ring, its advantage is more obvious; Preparation facilities of the present invention can adopt hand-stripping and automatic demoulding dual mode in addition, operates more flexibly, has improved greatly the qualification rate of suppressing radial ring.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 ~ Fig. 7 is the structural representation of 7 embodiment of the present invention.
Embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
Primary structure as Fig. 1 press: upper cylinder, lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, annular outer magnetic pole, the annular die cavity outer wall, plug, press column, annular outer magnetic pole, auxiliary cylinder and the portable plate that plays support structure are or/and fixed head, and the primary structures such as frame consist of.
The preparation facilities of radially oriented ring as shown in Figure 1: ring-type has the outside that certain thickness outer magnetic pole is close to the annular die cavity outer wall, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is a dismountable cylindrical shape, it is to be spliced by several independent watt types, can be manually with its dismounting when moulding finishes the demoulding, it is fixed on non-magnetic portable plate 18, link together by connection bracket between portable plate 18 and portable plate 20 and entablature, lower oil cylinder 15 motions drive portable plate 20 and connected system moves up and down together, make between whole mould and outer magnetic pole and produce relative motion; Non-magnetic lower punch 7 is fixed on portable plate 18, and plug 11 is fixed on auxiliary cylinder 17, rises and descends by the motion realization of auxiliary cylinder, and during the demoulding, auxiliary cylinder moves downward sloughs plug; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress.
Primary structure as Fig. 2 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, annular outer magnetic pole, annular die cavity outer wall, plug, press column, auxiliary cylinder and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 2: ring-type has the outside that certain thickness outer magnetic pole is close to the annular die cavity outer wall, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, be fixed on portable plate 19, portable plate 19 be rigidly connected by connection bracket and entablature and portable plate 20, Sports band dynamic model chamber by lower oil cylinder moves up and down together, make between whole mould and outer magnetic pole and produce relative motion, during the demoulding, portable plate 19 moves downward together with the die cavity outer wall under the drive of lower oil cylinder, realizes automatic demoulding; Non-magnetic lower punch 7 is fixed on fixed head 18, and the plug 11 of magnetic conduction is fixed on the auxiliary cylinder 17 of magnetic conduction, rises and descends by the motion realization of auxiliary cylinder, and during the demoulding, auxiliary cylinder moves downward and sloughs plug; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress.
Primary structure as Fig. 3 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, the annular outer magnetic pole, annular die cavity outer wall, plug, press column, the auxiliary cylinder auxiliary cylinder of annular and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 3: ring-type has the outside that certain thickness outer magnetic pole is close to the annular die cavity outer wall, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, be fixed on fixed head 21, fixed head 21 be rigidly connected by connection bracket and portable plate 19, the Sports band dynamic model chamber by lower oil cylinder moves up and down together, makes between whole mould and outer magnetic pole and produces relative motion; Non-magnetic lower punch 7 is fixed on portable plate 18, and during compacting, upwards compacting under the drive of annular auxiliary cylinder, realize two-way compacting; The plug 11 of magnetic conduction is fixed on the lower oil cylinder 15 of magnetic conduction, and the motion by combined oil cylinder in lower oil cylinder realizes rising and descending, the demoulding at present in oil cylinder combined oil cylinder move downward and slough plug; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1, lower punch 7 moves upward under the drive of annular auxiliary cylinder 17 and realizes two-way compacting; Demoulding oil cylinder 15 Sports band dynamic model cavity outer walls 5 at present moves downward and sloughs the die cavity outer wall, and the interior combined oil cylinder of lower oil cylinder 15 drives plug and moves downward and sloughs plug, realizes automatic demoulding.
Primary structure as Fig. 4 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, the annular outer magnetic pole, annular die cavity outer wall, plug, press column, the auxiliary cylinder of annular and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 4: ring-type has the outside that certain thickness outer magnetic pole is close to the annular die cavity outer wall, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, be fixed on portable plate 18, portable plate 18 is fixed on annular auxiliary cylinder 17, annular auxiliary cylinder 17 is fixed on portable plate 19, cross down the motion drive portable plate 19 of oil cylinder and the parts that are attached thereto thereof and move up and down together, make between whole mould and outer magnetic pole and produce relative motion; Non-magnetic lower punch 7 is fixed on portable plate 19, and it moves up and down by the drive of lower oil cylinder; Plug 11 is fixed on the lower oil cylinder 15 of magnetic conduction, and the motion by combined oil cylinder in lower oil cylinder realizes rising and descending, and the demoulding interior combined oil cylinder of oil cylinder 15 at present moves downward and sloughs plug; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress; During the demoulding, annular auxiliary cylinder 17 Sports band dynamic model cavity outer walls 5 move downward and slough the die cavity outer wall, and the interior combined oil cylinder drive of lower oil cylinder 15 plug moves downward sloughs plug, realizes automatic demoulding.
Primary structure as Fig. 5 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, the annular outer magnetic pole, annular die cavity outer wall, plug, press column, auxiliary cylinder and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 5: ring-type has the outside that certain thickness outer magnetic pole is close to the die cavity outer wall of annular, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, be fixed on fixed head 18, fixed head 18 is fixed on the press column or with support and is fixed on sill, non-magnetic lower punch 7 is fixed on portable plate 19, portable plate 19 is rigidly connected by support and portable plate 22, the motion drive portable plate 22 of lower oil cylinder 15 and portable plate 19 and the lower punch that is fixed on portable plate 19 move up and down, and make between the interior powder of die cavity and outer magnetic pole and produce relative motion; Plug 11 is fixed on the auxiliary cylinder 17 of magnetic conduction, rises and descends by the motion realization of auxiliary cylinder 17, and during the demoulding, auxiliary cylinder 17 moves downward and sloughs plug; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress; During the demoulding, auxiliary cylinder 17 moves downward and sloughs plug, and lower oil cylinder moves upward and drives the up die cavity outer wall of sloughing of lower punch and realize automatic demoulding.
Primary structure as Fig. 6 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, the annular outer magnetic pole, annular die cavity outer wall, plug, press column, auxiliary cylinder and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 6: ring-type has the outside that certain thickness outer magnetic pole is close to the die cavity outer wall of annular, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, and be fixed on portable plate 18, portable plate 18 is connected with portable plate 20 by connection bracket, and the motion by lower oil cylinder realizes moving up and down of die cavity; Non-magnetic lower punch 7 is fixed on portable plate 19, and portable plate 19 is connected with annular auxiliary cylinder 17, and the motion by annular cylinder 17 drives lower punch and moves up and down, and makes powder and outer magnetic pole generation relative motion before in die cavity; Plug 11 is fixed on the interior combined oil cylinder of lower oil cylinder 15 of magnetic conduction, realizes its rising or decline by the interior combined oil cylinder motion of lower oil cylinder 15; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress; The demoulding is the oil cylinder 15 descending die cavity outer walls of sloughing of Sports band dynamic model cavity outer wall at present, and the interior combined oil cylinder of lower oil cylinder 15 moves downward to be sloughed plug and realize automatic demoulding.
Primary structure as Fig. 7 press comprises upper and lower oil cylinder, upper and lower line bag, upper and lower crossbeam, annular upper and lower punch, the annular outer magnetic pole, annular die cavity outer wall, plug, press column, auxiliary cylinder and the portable plate that plays support structure be or/and fixed head, the formations such as frame.
The preparation facilities of radial orientation ring as shown in Figure 7: ring-type has the outside that certain thickness outer magnetic pole is close to the die cavity outer wall of annular, and outer magnetic pole is fixed on the outer magnetic pole connection bracket; The die cavity outer wall is one and has certain thickness cylindrical shape, is fixed on fixed head 18; Non-magnetic lower punch 7 is fixed on portable plate 19, portable plate 19 be connected with portable plate 20 by the support that is rigidly connected, portable plate 20 is connected with lower oil cylinder, and the motion by lower oil cylinder drives lower punch and moves up and down, and realizes producing relative motion between powder and outer magnetic pole; Plug 11 is fixed on the auxiliary cylinder 17 of magnetic conduction, realizes its rising or decline by auxiliary cylinder 17 motions; During compacting not magnetic conduction upper male mould 4 move downward under the drive of magnetic conduction upper cylinder 1 and suppress; Demoulding oil cylinder 15 motion at present drives lower punches rises and sloughs the die cavity outer wall, and auxiliary cylinder 15 moves downward to be sloughed plug and realize automatic demoulding.
Just the specific embodiment of the present invention of describing in above specification, various not illustrating is construed as limiting flesh and blood of the present invention, the person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.

Claims (7)

1. the preparation facilities of a permanent-magnetic ring of radial orientation, comprise the upper of press, sill, produce the line bag in magnetic field, the press column, upper cylinder, lower oil cylinder, frame, annular magnetic conductive board as outer magnetic pole, the outer magnetic pole connection bracket of magnetic conduction, the portable plate of auxiliary cylinder and a support structure is or/and fixed head, the die cavity outer wall, as the plug of magnetic conduction in the die cavity of internal magnetic pole and non-magnetic on, lower punch, it is characterized in that: fixing outer magnetic pole on described outer magnetic pole connection bracket, the thickness of outer magnetic pole is much smaller than the height of die cavity, when being connected with exciting current in the line bag, produce radial magnetic field in the ranged space of the die cavity between plug and outer magnetic pole, powder in die cavity back and forth moves up and down under the promotion of oil cylinder, make powder cycle through successively the plane at outer magnetic pole place in compacting.
2. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 1 is characterized in that: the line bag in described generation magnetic field is separately positioned on the upper and lower of press; The upper and lower of press arranges respectively envelope curve and/or lower envelope curve.
3. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 1 is characterized in that: described die cavity outer wall is fixed on portable plate or fixed head for annular; The die cavity outer wall can be the unitary construction of single annular, also can be spliced by the tile of a plurality of arcs.
4. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 3, it is characterized in that: the motion of described annular die cavity outer wall is to realize by the cylinder movement that portable plate or fixed head connect.
5. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 1, it is characterized in that: the motion of described upper and lower punch is realized by cylinder movement, the motion of upper male mould is moved to realize by upper cylinder, lower punch is fixed on portable plate or fixed head, and the motion that is fixed on the lower punch on portable plate is that the motion by auxiliary cylinder realizes.
6. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 1 is characterized in that: described motion as the internal magnetic pole plug is controlled by lower oil cylinder or auxiliary cylinder, and ejects after adding powder, and compacting finishes backward lower motion and sloughs plug.
7. the preparation facilities of a kind of permanent-magnetic ring of radial orientation as claimed in claim 1, it is characterized in that: belong between described entablature and press column and outer magnetic pole connecting struts and be slidably connected, and when orientation drives when driving the portable plate of die cavity motion or orientation to belong between the portable plate of lower punch motion and is rigidly connected, and its motion is realized by the motion of auxiliary cylinder or lower oil cylinder.
CN201310059494.6A 2013-02-26 2013-02-26 The preparation facilities of a kind of permanent-magnetic ring of radial orientation Active CN103123863B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286980A (en) * 2013-06-18 2013-09-11 南通国谊锻压机床有限公司 Mould pressing device of radiating orientation forming hydraulic machine
CN103567439A (en) * 2013-08-09 2014-02-12 浙江东阳东磁有限公司 Oriented pressing device and method for large-height-to-diameter-ratio radiation ring
CN104174844A (en) * 2014-08-19 2014-12-03 宁波百琪达自动化设备有限公司 Full-automatic magnetic field forming press
CN104505205A (en) * 2014-11-21 2015-04-08 宁波金鸡强磁股份有限公司 Rare earth permanent magnetic material molding equipment and molding method
CN111957957A (en) * 2020-08-26 2020-11-20 宁波韵升股份有限公司 Preparation method of low-declination wafer magnetic steel
CN115365496A (en) * 2022-08-04 2022-11-22 惠州市安可远磁性器件有限公司 Tooling equipment for manufacturing magnetic ring

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US5913255A (en) * 1996-08-09 1999-06-15 Hitachi Metals Ltd. Radially anisotropic sintered R-Fe-B-based magnet and production method thereof
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CN202317014U (en) * 2012-04-05 2012-07-11 横店集团东磁股份有限公司 Multipole-oriented and radiation-oriented multifunctional magnetic field press
CN202356620U (en) * 2011-12-06 2012-08-01 广东江粉磁材股份有限公司 Difunctional mould base of automatic hydraulic press for forming magnetic dry powder
CN202377532U (en) * 2012-01-09 2012-08-15 湖南航天工业总公司 Pressing die for preparing radial direction-oriented integrated permanent magnet ring
CN202461515U (en) * 2012-02-10 2012-10-03 右任磁电(徐州)有限公司 Radial cylindrical magnet forming die
CN203218101U (en) * 2013-02-26 2013-09-25 江苏东瑞磁材科技有限公司 Manufacturing device of radial orientation permanent magnet ring

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US5913255A (en) * 1996-08-09 1999-06-15 Hitachi Metals Ltd. Radially anisotropic sintered R-Fe-B-based magnet and production method thereof
CN101256898A (en) * 2008-03-27 2008-09-03 深圳市天盈德科技有限公司 Method and apparatus for forming of radiation orientating round ring-shaped magnetic body
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286980A (en) * 2013-06-18 2013-09-11 南通国谊锻压机床有限公司 Mould pressing device of radiating orientation forming hydraulic machine
CN103286980B (en) * 2013-06-18 2016-05-11 南通国谊锻压机床有限公司 A kind of molding device of radially oriented forming hydraulic press
CN103567439A (en) * 2013-08-09 2014-02-12 浙江东阳东磁有限公司 Oriented pressing device and method for large-height-to-diameter-ratio radiation ring
CN104174844A (en) * 2014-08-19 2014-12-03 宁波百琪达自动化设备有限公司 Full-automatic magnetic field forming press
CN104505205A (en) * 2014-11-21 2015-04-08 宁波金鸡强磁股份有限公司 Rare earth permanent magnetic material molding equipment and molding method
CN104505205B (en) * 2014-11-21 2017-02-22 宁波金鸡强磁股份有限公司 Rare earth permanent magnetic material molding equipment and molding method
CN111957957A (en) * 2020-08-26 2020-11-20 宁波韵升股份有限公司 Preparation method of low-declination wafer magnetic steel
CN111957957B (en) * 2020-08-26 2021-11-19 宁波韵升股份有限公司 Preparation method of low-declination wafer magnetic steel
CN115365496A (en) * 2022-08-04 2022-11-22 惠州市安可远磁性器件有限公司 Tooling equipment for manufacturing magnetic ring
CN115365496B (en) * 2022-08-04 2023-10-27 惠州市安可远磁性器件有限公司 Tooling equipment for manufacturing magnetic ring

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Inventor after: Wang Junwen

Inventor after: Dong Shengzhi

Inventor after: Liao Chao

Inventor after: Ma Shiguang

Inventor before: Dong Shengzhi

Inventor before: Zhang Youzhang

Inventor before: Ma Shiguang

Inventor before: Chen Bicheng

Inventor before: Yao Yanjun

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Effective date of registration: 20240401

Address after: Plant 5, West Area, West the Taihu Lake International Smart Park, No. 2, Tenglong Road, West the Taihu Lake Science and Technology Industrial Park, Changzhou City, Jiangsu Province, 213000

Patentee after: Changzhou Longci Material Technology Co.,Ltd.

Country or region after: China

Address before: 213000 Tenglong Road, Wujin Economic Development Zone, Changzhou, Jiangsu 2

Patentee before: ORIENT MAGNET TECHNOLOGY (OMT) Co.,Ltd.

Country or region before: China