CN106890863A - Hot back extrusion radiation orientation ring press - Google Patents
Hot back extrusion radiation orientation ring press Download PDFInfo
- Publication number
- CN106890863A CN106890863A CN201710190331.XA CN201710190331A CN106890863A CN 106890863 A CN106890863 A CN 106890863A CN 201710190331 A CN201710190331 A CN 201710190331A CN 106890863 A CN106890863 A CN 106890863A
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- Prior art keywords
- pressure
- anchor point
- compression leg
- displacement
- hot
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- 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.)
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Links
- 238000001125 extrusion Methods 0.000 title abstract description 5
- 230000005855 radiation Effects 0.000 title abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 42
- 230000006835 compression Effects 0.000 claims description 32
- 238000007906 compression Methods 0.000 claims description 32
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 229910052786 argon Inorganic materials 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 11
- 238000004826 seaming Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 8
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 230000007306 turnover Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 238000007731 hot pressing Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 abstract description 2
- 150000002910 rare earth metals Chemical class 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000008676 import Effects 0.000 description 3
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/212—Details
- B21C23/215—Devices for positioning or centering press components, e.g. die or container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/212—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a preparation method of a hot back extrusion radiation orientation ring press. The hot-pressed magnet has the advantages of excellent temperature stability, corrosion resistance, time stability, high density, high orientation degree, high coercive force, near-net shaping, short hot-pressing process period, no use or little use of heavy rare earth elements and the like, and is particularly suitable for application in the aspects of high-precision drivers, micro and special motors and the like. The hot pressing process has the characteristics of high efficiency, energy conservation and high material utilization rate in the preparation process. The hot-pressed neodymium iron boron does not use heavy rare earth, but can realize magnetic performance comparable to sintering, and is mainly used for a radiation orientation ring for an automobile power steering motor at present. The invention improves the yield and the processing efficiency of the hot-pressing radiation ring and the magnetic property of the product.
Description
Technical field
The present invention relates to a kind of preparation method of the heat back of the body radially oriented ring press of extrusion.
Background technology
Hot-pressed magnets have that excellent temperature stability, corrosion-resistant and time stability, consistency are high, the degree of orientation is high, strong
Stupid power is high and newly net forming, heat pressing process cycle is short, the advantages of do not use or use heavy rare earth element less, is particularly suitable for high-precision
The application of the aspects such as degree driver, small and special electric machine.Heat pressing process has the spy that preparation process is energy-efficient, stock utilization is high
Point.Hot pressing neodymium iron boron does not use heavy rare earth, but can realize the magnetic property matched in excellence or beauty with sintering, is currently used primarily in motor turning power-assisted
The radially oriented ring of motor.
The content of the invention
It is an object of the invention to provide a kind of press for preparing radially oriented ring, the method that the press is extruded using the heat back of the body
Prepare radially oriented ring.
In order to reach above-mentioned purpose, solution of the invention is：
A kind of method using heat back of the body extrusion prepares the press of radially oriented ring, comprises the following steps：
Step (1), using four columns, 100 tons of upper master cylinder, annular cylinder 10T, 30 tons of lower cylinder, pressure controling precision 1%,
Upper cylinder pressurizes, and lower cylinder ejector, annular cylinder fits crackle and workpiece is pushed down when above purging with out and prevent from taking out of, seaming chuck and ring
Shape displacement of pressing head 370mm, push-down head displacement 80mm, idle stroke control accuracy ± 0.08mm；
Step (2), main cavity uses stainless steel interlayer water-cooled, room temperature in vacuo degree 5X10-3Pa, it is Pressure Rise Rate 4Pa/ hours, empty
Stove reaches capacity the time less than 60min, and energy applying argon gas automatically control argon pressure to normal pressure+0.005-0.01MPa；
Step (3), main cavity size and compression leg stroke according to mould bases determine,>300 millimeters；Both sides transition warehouse passes through plate
Valve is connected with main cavity, can independently vacuumize applying argon gas, room temperature in vacuo degree 5X10-3Pa, Pressure Rise Rate Pressure Rise Rate 4Pa/ hours；
Step (4), stays sufficient space to load and unload material, electric wire needed for vacuum cavity is reserved in both sides transition warehouse and vacuum cavity
Import and export and the another part of vacuum sealing；
Step (5), using vacuum triplex, vacuum triplex automatic switch control；
Step (6), with illumination, gloves, fore-and-aft observing hole, argon pressure (+0.005MPa) control valve and table, argon pressure
Alarm, hydraulic pressure alarm；
Step (7), control screen displays temperature, pressure and displacement change over time curve；
Step (8), upper compression leg has speed two-stage displacement rate controlling；
Step (9), lower compression leg has the fast row rate controlling of one-level；
Step (10), rate controlling 0.1-1.5 mm/seconds are adjustable during upper compression leg slow depression displacement；
Step (11), upper compression leg has upper and lower two anchor point, and upper anchor point is lifted and is defined in order to removable operation, lower anchor point
It is pressing operation；
Step (12), lower compression leg also has upper and lower two anchor point, and dress sample is realized when upper anchor point is parallel with cavity plate top, lower fixed
Site is compacting operating position, using machinery positioning；
Step (13), uniform temperature zone size：φ100×100mm；
Step (14), rated temperature：1000℃
Step (15), exists after insulation compared with deviation control after assigned temperature：±1；
Step (16), heating rate：1000 DEG C are risen to, the time is less than 60min；
Step (17), manipulator gives hot stove and the die-filling transport and the demoulding between of mould in specimen holder；
Step (18), using sliding form frame structure；
Step (19), cavity plate and seaming chuck and give hot three furnace powers respectively 2.2kw, 1.5kw, 0.6kw or so；
Step (20), using bandlet (broadband) calandria, point half body of heater (two halves are detachable).
After using such scheme, compared with prior art, the beneficial effects of the invention are as follows improve hot pressing radiation ring into
The magnetic property of product rate, processing efficiency and product.
Specific embodiment
Embodiment 1
Step (1), using four columns, 100 tons of upper master cylinder, annular cylinder 10T, 30 tons of lower cylinder, pressure controling precision 1%,
Upper cylinder pressurizes, and lower cylinder ejector, annular cylinder fits crackle and workpiece is pushed down when above purging with out and prevent from taking out of, seaming chuck and ring
Shape displacement of pressing head 370mm, push-down head displacement 80mm, idle stroke control accuracy ± 0.08mm；
Step (2), main cavity uses stainless steel interlayer water-cooled, room temperature in vacuo degree 5X10-3Pa, it is Pressure Rise Rate 4Pa/ hours, empty
Stove reaches capacity the time less than 60min, and energy applying argon gas automatically control argon pressure to normal pressure+0.005-0.01MPa；
Step (3), main cavity size and compression leg stroke according to mould bases determine,>300 millimeters；
Both sides transition warehouse is connected by push-pull valve with main cavity, can independently vacuumize applying argon gas, room temperature in vacuo degree 5X10- 3Pa, Pressure Rise Rate Pressure Rise Rate 4Pa/ hours；
Step (4), stays sufficient space to load and unload material, electric wire needed for vacuum cavity is reserved in both sides transition warehouse and vacuum cavity
Import and export and the another part of vacuum sealing；
Step (5), using vacuum triplex, vacuum triplex automatic switch control；
Step (6), with illumination, gloves, fore-and-aft observing hole, argon pressure (+0.005MPa) control valve and table, argon pressure
Alarm, hydraulic pressure alarm；
Step (7), control screen displays temperature, pressure and displacement change over time curve；
Step (8), upper compression leg has speed two-stage displacement rate controlling；
Step (9), lower compression leg has the fast row rate controlling of one-level；
Step (10), rate controlling 0.1-1.5 mm/seconds are adjustable during upper compression leg slow depression displacement；
Step (11), upper compression leg has upper and lower two anchor point, and upper anchor point is lifted and is defined in order to removable operation, lower anchor point
It is pressing operation；
Step (12), lower compression leg also has upper and lower two anchor point, and dress sample is realized when upper anchor point is parallel with cavity plate top, lower fixed
Site is compacting operating position, using machinery positioning；
Step (13), uniform temperature zone size：φ100×100mm；
Step (14), rated temperature：1000℃
Step (15), exists after insulation compared with deviation control after assigned temperature：±1；
Step (16), heating rate：1000 DEG C are risen to, the time is less than 60min；
Step (17), manipulator gives hot stove and the die-filling transport and the demoulding between of mould in specimen holder；
Step (18), using sliding form frame structure；
Step (19), cavity plate and seaming chuck and give hot three furnace powers respectively 2.2kw, 1.5kw, 0.6kw or so；
Step (20), using bandlet (broadband) calandria, point half body of heater (two halves are detachable).
Embodiment 2
Step (1), using four columns, 100 tons of upper master cylinder, annular cylinder 5T, 40 tons of lower cylinder, pressure controling precision 1%, on
Oil cylinder pressurizes, and lower cylinder ejector, annular cylinder fits crackle and workpiece is pushed down when above purging with out and prevent from taking out of, seaming chuck and annular
Displacement of pressing head 370mm, push-down head displacement 80mm, idle stroke control accuracy ± 0.08mm；
Step (2), main cavity uses stainless steel interlayer water-cooled, room temperature in vacuo degree 5X10-3Pa, it is Pressure Rise Rate 4Pa/ hours, empty
Stove reaches capacity the time less than 60min, and energy applying argon gas automatically control argon pressure to normal pressure+0.005-0.01MPa；
Step (3), main cavity size and compression leg stroke according to mould bases determine,>300 millimeters；Both sides transition warehouse passes through plate
Valve is connected with main cavity, can independently vacuumize applying argon gas, room temperature in vacuo degree 5X10-3Pa, Pressure Rise Rate Pressure Rise Rate 4Pa/ hours；
Step (4), stays sufficient space to load and unload material, electric wire needed for vacuum cavity is reserved in both sides transition warehouse and vacuum cavity
Import and export and the another part of vacuum sealing；
Step (5), using vacuum triplex, vacuum triplex automatic switch control；
Step (6), with illumination, gloves, fore-and-aft observing hole, argon pressure (+0.005MPa) control valve and table, argon pressure
Alarm, hydraulic pressure alarm；
Step (7), control screen displays temperature, pressure and displacement change over time curve；
Step (8), upper compression leg has speed two-stage displacement rate controlling；
Step (9), lower compression leg has the fast row rate controlling of one-level；
Step (10), rate controlling 0.1-1.5 mm/seconds are adjustable during upper compression leg slow depression displacement；
Step (11), upper compression leg has upper and lower two anchor point, and upper anchor point is lifted and is defined in order to removable operation, lower anchor point
It is pressing operation；
Step (12), lower compression leg also has upper and lower two anchor point, and dress sample is realized when upper anchor point is parallel with cavity plate top, lower fixed
Site is compacting operating position, using machinery positioning；
Step (13), uniform temperature zone size：φ300×300mm；
Step (14), rated temperature：1000℃
Step (15), exists after insulation compared with deviation control after assigned temperature：±1；
Step (16), heating rate：1000 DEG C are risen to, the time is less than 60min；
Step (17), manipulator gives hot stove and the die-filling transport and the demoulding between of mould in specimen holder；
Step (18), using sliding form frame structure；
Step (19), cavity plate and seaming chuck and give hot three furnace powers respectively 2.2kw, 1.5kw, 0.6kw or so；
Step (20), it is in calandria, induction coil plus corundum set and graphite cannula to use induction coil, and body of heater is monoblock type.
Embodiment 3
Step (1), using four columns, 100 tons of upper master cylinder, annular cylinder 10T, 30 tons of lower cylinder, pressure controling precision 1%,
Upper cylinder pressurizes, and lower cylinder ejector, annular cylinder fits crackle and workpiece is pushed down when above purging with out and prevent from taking out of, seaming chuck and ring
Shape displacement of pressing head 370mm, push-down head displacement 80mm, idle stroke control accuracy ± 0.08mm；
Step (2), compression leg stroke according to mould bases determine,>300 millimeters；
Step (3), with illumination, hydraulic pressure alarm；
Step (4), control screen displays temperature, pressure and displacement change over time curve；
Step (5), upper compression leg has speed two-stage displacement rate controlling；
Step (6), lower compression leg has the fast row rate controlling of one-level；
Step (7), rate controlling 0.1-1.5 mm/seconds are adjustable during upper compression leg slow depression displacement；
Step (8), upper compression leg has upper and lower two anchor point, and upper anchor point is lifted and is defined in order to removable operation, lower anchor point
It is pressing operation；
Step (9), lower compression leg also has upper and lower two anchor point, and dress sample is realized when upper anchor point is parallel with cavity plate top, lower fixed
Site is compacting operating position, using machinery positioning；
Step (10), uniform temperature zone size：φ100×100mm；
Step (11), rated temperature：1000℃
Step (12), exists after insulation compared with deviation control after assigned temperature：±1；
Step (13), heating rate：1000 DEG C are risen to, the time is less than 60min；
Step (14), manipulator gives hot stove and the die-filling transport and the demoulding between of mould in specimen holder；
Step (15), using sliding form frame structure；
Step (16), cavity plate and seaming chuck and give hot three furnace powers respectively 2.2kw, 1.5kw, 0.6kw or so；
Step (17), using taenidium calandria, body of heater is monoblock type；
Step (18), in stove can applying argon gas in case magnet aoxidize.
Claims (8)
1. a kind of heat back of the body extrudes the preparation method of radially oriented ring press, it is characterised in that comprise the following steps：
Step (1), using four columns, 100 tons of upper master cylinder, annular cylinder 10T, 30 tons of lower cylinder, pressure controling precision 1% oils
Cylinder is pressurizeed, and lower cylinder ejector, annular cylinder fits crackle and workpiece is pushed down when above purging with out and prevents from taking out of, and seaming chuck and annular are pressed
Head displacement 370mm, push-down head displacement 80mm, idle stroke control accuracy ± 0.08mm；
Step (2), main cavity uses stainless steel interlayer water-cooled, room temperature in vacuo degree 5X10-3Pa, Pressure Rise Rate 4Pa/ hours, empty stove reached
60min is less than to limit time, and energy applying argon gas automatically control argon pressure to normal pressure+0.005-0.01MPa；
Step (3), main cavity size and compression leg stroke according to mould bases determine,>300 millimeters；Both sides transition warehouse by push-pull valve with
Main cavity is connected, and can independently vacuumize applying argon gas, room temperature in vacuo degree 5X10-3Pa, Pressure Rise Rate Pressure Rise Rate 4Pa/ hours；
Step (4), stays sufficient space to load and unload material, electric wire turnover needed for vacuum cavity is reserved in both sides transition warehouse and vacuum cavity
Mouth and the another part of vacuum sealing；
Step (5), using vacuum triplex, vacuum triplex automatic switch control；
Step (6), with illumination, gloves, fore-and-aft observing hole, argon pressure (+0.005MPa) control valve and table, argon pressure report
Alert, hydraulic pressure alarm；
Step (7), control screen displays temperature, pressure and displacement change over time curve；
Step (8), upper compression leg has speed two-stage displacement rate controlling；
Step (9), lower compression leg has the fast row rate controlling of one-level；
Step (10), rate controlling 0.1-1.5 mm/seconds are adjustable during upper compression leg slow depression displacement；
Step (11), upper compression leg has upper and lower two anchor point, and upper anchor point is lifted and is defined in order to removable operation, and lower anchor point is pressure
System operation；
Step (12), lower compression leg also has upper and lower two anchor point, and dress sample, lower anchor point are realized when upper anchor point is parallel with cavity plate top
It is compacting operating position, using machinery positioning；
Step (13), uniform temperature zone size：φ100×100mm；
Step (14), rated temperature：1000℃
Step (15), exists after insulation compared with deviation control after assigned temperature：±1；
Step (16), heating rate：1000 DEG C are risen to, the time is less than 60min；
Step (17), manipulator gives hot stove and the die-filling transport and the demoulding between of mould in specimen holder；
Step (18), using sliding form frame structure；
Step (19), cavity plate and seaming chuck and give hot three furnace powers respectively 2.2kw, 1.5kw, 0.6kw or so；
Step (20), using bandlet (broadband) calandria, point half body of heater (two halves are detachable).
2. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：
Step (1), framework include four columns or two columns, upper master cylinder 50-100 tons, annular cylinder 1-20T, 10-50 tons of lower cylinder,
Pressure controling precision 1-2%, seaming chuck and annular displacement of pressing head 100-500mm, push-down head displacement 50-500mm, null process control
Precision ± 0.04-0.2mm.
3. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(2), main cavity includes using vacuum sealing, also including cavity blow-by, but fills inert protective gas.
4. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(7), control screen displays temperature, pressure and displacement changes over time curve.
5. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(10), rate controlling 0-10 mm/seconds are adjustable during upper compression leg slow depression displacement.
6. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(12), lower compression leg has upper and lower two anchor point, and dress sample is realized when upper anchor point is parallel with cavity plate top, and lower anchor point is compacting work
Position, using machinery positioning.
7. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(18), using sliding form frame structure.
8. a kind of heat back of the body as claimed in claim 1 extrudes the preparation method of radially oriented ring press, it is characterised in that：Step
(20), mode of heating includes two kinds of mode of heatings of resistance and induction coil, and resistance heating includes bandlet calandria and taenidium two
Kind；Body of heater is divided to monoblock type and is divided to two kinds of half formula body of heater；Add corundum set and graphite cannula in induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710190331.XA CN106890863A (en) | 2017-03-28 | 2017-03-28 | Hot back extrusion radiation orientation ring press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710190331.XA CN106890863A (en) | 2017-03-28 | 2017-03-28 | Hot back extrusion radiation orientation ring press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106890863A true CN106890863A (en) | 2017-06-27 |
Family
ID=59193133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710190331.XA Pending CN106890863A (en) | 2017-03-28 | 2017-03-28 | Hot back extrusion radiation orientation ring press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106890863A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963320A (en) * | 1989-04-14 | 1990-10-16 | Daido Tokushuko Kabushiki Kaisha | Method and apparatus for producing anisotropic rare earth magnet |
| JPH02263415A (en) * | 1989-04-04 | 1990-10-26 | Daido Steel Co Ltd | Manufacture of radial anisotropic permanent magnet |
| CN1770338A (en) * | 2005-09-08 | 2006-05-10 | 浙江升华强磁材料有限公司 | Forming process for radially oriented magnetic ring |
| CN2917849Y (en) * | 2006-07-07 | 2007-07-04 | 唐建军 | Oil drill pipe joint die |
| CN101202143A (en) * | 2007-11-09 | 2008-06-18 | 钢铁研究总院 | High performance radial hot pressing magnet ring and preparation method thereof |
| CN106057462A (en) * | 2016-07-13 | 2016-10-26 | 太原盛开源永磁设备有限公司 | Shifting magnetic field type method and device for pressing radiant orientation circular ring |
-
2017
- 2017-03-28 CN CN201710190331.XA patent/CN106890863A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263415A (en) * | 1989-04-04 | 1990-10-26 | Daido Steel Co Ltd | Manufacture of radial anisotropic permanent magnet |
| US4963320A (en) * | 1989-04-14 | 1990-10-16 | Daido Tokushuko Kabushiki Kaisha | Method and apparatus for producing anisotropic rare earth magnet |
| CN1770338A (en) * | 2005-09-08 | 2006-05-10 | 浙江升华强磁材料有限公司 | Forming process for radially oriented magnetic ring |
| CN2917849Y (en) * | 2006-07-07 | 2007-07-04 | 唐建军 | Oil drill pipe joint die |
| CN101202143A (en) * | 2007-11-09 | 2008-06-18 | 钢铁研究总院 | High performance radial hot pressing magnet ring and preparation method thereof |
| CN106057462A (en) * | 2016-07-13 | 2016-10-26 | 太原盛开源永磁设备有限公司 | Shifting magnetic field type method and device for pressing radiant orientation circular ring |
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