CN102873325A - Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode - Google Patents
Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode Download PDFInfo
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- CN102873325A CN102873325A CN2012103378179A CN201210337817A CN102873325A CN 102873325 A CN102873325 A CN 102873325A CN 2012103378179 A CN2012103378179 A CN 2012103378179A CN 201210337817 A CN201210337817 A CN 201210337817A CN 102873325 A CN102873325 A CN 102873325A
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Abstract
The invention relates to a method for feeding neodymium iron boron magnetic powder into a die for pressing in a layered mode. The method comprises the following steps that: the number of feeding layers and the feeding depth of each layer are calculated; the weighed magnetic powder is put into a feeding hopper arranged on a horizontal guide rail; a magnetic scale moves upwards and measures a preset value of a first layer, the feeding hopper moves forwards to the upper part of a die cavity along a horizontal guide plate, feeds and fills the die cavity and moves backwards to scrape the magnetic powder on the surface of the die cavity; and the magnetic scale moves downwards to a second layer and stops descending, the feeding hopper performs feeding and scraping for the second time, and the process is repeated until the final layer is fed and the magnetic powder is scraped. By a layered feeding and scraping method, the powder in the die cavity is uniformly filled, a magnetic steel product formed by pressing has a regular shape and is high in dimensional accuracy, reserved machining allowance can be reduced, and production cost is reduced; and the magnetic steel product formed by pressing has uniform density, and is high in magnetic property consistency after being magnetized.
Description
Technical field
The present invention relates to the compression-moulding methods of NdFeB magnetic powder, especially magnetic enters the layering feeding method of die cavity.
Background technology
The most magnetics that adopt of neodymium iron boron magnetic body are compressing in die cavity, because the neodymium-iron-boron powder is little, viscosity is large, poor fluidity, when being poured in the die cavity, natural packing becomes " arch heap " phenomenon, be difficult to shakeout the corner, cause magnetic voidage in die cavity to increase skewness in die cavity, product density after the compacting is inconsistent, stampings are reserved larger allowance, and cause product magnetic orientation degree inconsistent, affect magnet performance.
CN102489701A is in full-automatic magnetic powder molding press, metering device is proposed, adopt the delivery sheet under the feeding oil cylinder contiguous block pulling feed box inner bag to move to realize that quantitative pan feeding is in die cavity, but it is still disposable pan feeding, do not solve the magnetic poor fluidity and in die cavity, form " arch heap ", can't automatically shakeout the corner, cause magnetic skewness problem in die cavity.Even thereby full-automatic magnetic powder molding press, still exist the magnet density after the compacting inhomogeneous, magnet degree of orientation inconsistence problems still exists.
Summary of the invention
The present invention be directed in the compression molding of NdFeB magnetic powder and exist product density inconsistent, stampings are reserved and are added the large problem of surplus, propose a kind of neodymium iron boron equally distributed method in die cavity that makes, solution magnet density consistency problem.
The present invention adopts to the method for die cavity layering feeding and realizes above-mentioned purpose.
NdFeB magnetic powder enters the layering feeding method of mold pressing system, and its feature may further comprise the steps:
A), according to rectangle die cavity cross-sectional area and the number of plies of cavity depth ratio calculation layering feeding and the degree of depth of every layer of feeding;
B), feeding hopper is placed on the horizontal guide rail on the die cavity, the magnetic of having weighed is put into feeding hopper entirely;
When c), rising to the feeding degree of depth of default ground floor with magnetic railings ruler promotion push-down head, magnetic railings ruler stops vertical motion, feeding hopper is taken action forward along horizontal guide plate, fills up to the die cavity feeding when being positioned at the die cavity top to feeding hopper, and feeding hopper backward regression strikes off the cavity surface magnetic;
D), magnetic railings ruler moves down, and stops down maneuver when magnetic railings ruler measures the feeding degree of depth of the second layer, feeding hopper carry out the second time feeding with strike off, it is complete and strike off till the magnetic so to be circulated to last one deck feeding.
Described rectangle die cavity cross-sectional area and cavity depth ratio can be divided into 6～8 layers of feeding less than 25 o'clock, and described rectangle die cavity cross-sectional area and cavity depth ratio can be divided into 3～5 layers of feeding more than or equal to 25 o'clock.
When dividing 8 layers of feeding, every layer depth is controlled at respectively 30～35%, 25～30%, 20～25%, 16～20%, 12～16%, 8～12%, 4～8%, 2～4% of rectangle cavity depth.
When dividing 5 layers of feeding, every layer depth is controlled at respectively 30～35%, 25～30%, 15～25%, 8～15%, 4～8% of rectangle cavity depth.
The invention has the beneficial effects as follows: the method that adopts the layering feeding to strike off, make the powder packed in the die cavity even, repressed magnet steel product design is regular, and dimensional accuracy is high, can reduce reserving machine allowance, reduces production costs; Compressing magnet steel product density is even, after magnetizing, and the magnetic property high conformity.
Description of drawings
Fig. 1 is front view of the present invention.
Fig. 2 is that the A of Fig. 1 is to view.
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1 and Figure 2, suppress the neodymium-iron-boron product made from steel of a certain specification, it is long that its cavity dimension is designed to 20.5mm() * 65.5mm(is wide) * 83.85mm(is dark).Calculate the number of plies of layering feeding and the degree of depth of every layer of feeding by the cross-sectional area of rectangle die cavity 6 and the radiometer of cavity depth, feeding hopper 4 is placed on the horizontal guide rail 1 on the die cavity 6, the reinforced process of PLC controller 12 controls is: lower oil cylinder 9 drives magnetic railings ruler 10 and moves upward, promoting push-down head 8 rises, when the measured value of magnetic railings ruler 10 reaches preset value, be that die cavity 6 upper cavity height are when reaching 22mm, lower oil cylinder 9 stop motions, reciprocating air cylinder 5 is subjected to the order action, driving feeding hopper 4 travels forward along guide plate 1, when feeding chamber 3 is positioned at die cavity 6 top, feeding chamber 3 interior magnetics move downward and enter die cavity 6, and reciprocating air cylinder 5 stroke that travels forward finishes, and motion resets backward, feeding hopper 4 moves backward along guide plate 1, strikes off the magnetic on die cavity 6 surfaces.This at present oil cylinder 9 made, driving magnetic railings ruler 10 moves downward, when magnetic railings ruler 10 measured values reach preset value, lower oil cylinder stop motion, push-down head 8 moves down 18mm under lower oil cylinder 9 drives, and cavity appears in die cavity 6 tops, reciprocating air cylinder 5 is subjected to the order action to drive feeding chamber 3 to moving forward to die cavity 6 tops again, in die cavity 6 top cavitys, fill magnetic 7 by feeding hopper 4, feeding hopper 4 along guide plate 1 backward translation strike off die cavity 6 surperficial magnetics, the secondary working cycles finishes.Again repeat above-mentioned working cycles, push-down head 8 descend successively 15mm, 12mm, 9mm, 5mm, 2.85mm.Through after the above-mentioned working cycles, fill in the die cavity and fill and lead up magnetic.Electromagnet 11 work, after generation magnetic field was orientated magnetic 7, seaming chuck 2 was suppressed into magnetic patch with magnetic under the effect of upper cylinder.
Embodiment 2
Suppress the neodymium-iron-boron product made from steel of a certain specification, it is long that its cavity dimension is designed to 58.6mm() * 52.3mm(is wide) * 84.48mm(is dark).Calculate the number of plies of layering feeding and the degree of depth of every layer of feeding by the cross-sectional area of rectangle die cavity 6 and the radiometer of cavity depth, feeding hopper 4 is placed on the horizontal guide rail 1 on the die cavity 6, the reinforced process of PLC controller 12 controls is: lower oil cylinder 9 drives magnetic railings ruler 10 and moves upward, promoting push-down head 8 rises, when the measured value of magnetic railings ruler 10 reaches preset value, be that die cavity 6 upper cavity height are when reaching 30mm, lower oil cylinder 9 stop motions, reciprocating air cylinder 5 is subjected to the order action, driving feeding hopper 4 travels forward along guide plate 1, when feeding chamber 3 is positioned at die cavity 6 top, feeding chamber 3 interior magnetics move downward and enter die cavity 6, and reciprocating air cylinder 5 stroke that travels forward finishes, and motion resets backward, feeding hopper 4 moves backward along guide plate 1, strikes off the magnetic on die cavity 6 surfaces.This at present oil cylinder 9 made, driving magnetic railings ruler 10 moves downward, when magnetic railings ruler 10 measured values reach preset value, lower oil cylinder 9 stop motions, push-down head 8 moves down 23mm under lower oil cylinder drives, and cavity appears in die cavity 6 tops, reciprocating air cylinder 5 is subjected to the order action again, drive feeding chamber 3 to moving forward to die cavity 6 tops, fill magnetic by feeding hopper 4 in die cavity 6 top cavitys, working cycles finishes.Again repeat above-mentioned working cycles, push-down head descend successively 18mm, 8mm, 5.48mm.Through after the above-mentioned working cycles, fill in the die cavity 6 and fill and lead up magnetic.Electromagnet 11 work, after generation magnetic field was orientated magnetic, seaming chuck 2 was suppressed into magnetic patch with magnetic under the effect of upper cylinder.
Claims (4)
1. NdFeB magnetic powder enters the layering feeding method of mold pressing system, and its feature may further comprise the steps:
A), according to rectangle die cavity cross-sectional area and the number of plies of cavity depth ratio calculation layering feeding and the degree of depth of every layer of feeding;
B), feeding hopper is placed on the horizontal guide rail on the die cavity, the magnetic of having weighed is put into feeding hopper entirely;
When c), rising to the feeding degree of depth of default ground floor with magnetic railings ruler promotion push-down head, magnetic railings ruler stops vertical motion, feeding hopper is taken action forward along horizontal guide plate, fills up to the die cavity feeding when being positioned at the die cavity top to feeding hopper, and feeding hopper backward regression strikes off the cavity surface magnetic;
D), magnetic railings ruler moves down, and stops down maneuver when magnetic railings ruler measures the feeding degree of depth of the second layer, feeding hopper carry out the second time feeding with strike off, it is complete and strike off till the magnetic so to be circulated to last one deck feeding.
2. NdFeB magnetic powder according to claim 1 enters the layering feeding method of mold pressing system, it is characterized in that described rectangle die cavity cross-sectional area and cavity depth ratio were less than 25 o'clock, can be divided into 6～8 layers of feeding, described rectangle die cavity cross-sectional area and cavity depth ratio can be divided into 3～5 layers of feeding more than or equal to 25 o'clock.
3. NdFeB magnetic powder according to claim 1 enters the layering feeding method of mold pressing system, and when it is characterized in that minute 8 layers of feeding, every layer depth is controlled at respectively 30～35%, 25～30% of rectangle cavity depth, 20～25%, 16～20%, 12～16%, 8～12%, 4～8%, 2～4%.
4. NdFeB magnetic powder according to claim 1 enters the layering feeding method of mold pressing system, and when it is characterized in that minute 5 layers of feeding, every layer depth is controlled at respectively 30～35%, 25～30%, 15～25%, 8～15%, 4～8% of rectangle cavity depth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210337817.9A CN102873325B (en) | 2012-09-13 | 2012-09-13 | Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode |
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| CN201210337817.9A CN102873325B (en) | 2012-09-13 | 2012-09-13 | Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode |
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| CN102873325A true CN102873325A (en) | 2013-01-16 |
| CN102873325B CN102873325B (en) | 2014-11-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506622A (en) * | 2013-09-29 | 2014-01-15 | 成都易态科技有限公司 | Isostatic compaction mould, compaction method utilizing mould and accessories of mould for powder sintering materials |
| CN104495411A (en) * | 2014-11-13 | 2015-04-08 | 孔庆虹 | Pneumatic feeding set |
| CN108723360A (en) * | 2018-06-22 | 2018-11-02 | 江门杰富意磁性材有限公司 | A kind of the molding press device and method of mesh shaped magnetic core |
| CN110239141A (en) * | 2019-06-26 | 2019-09-17 | 浙江湾区机器人技术有限公司 | A kind of feeding device and charging process for various powders layering |
| CN111871489A (en) * | 2020-07-02 | 2020-11-03 | 潍坊潍液机械有限公司 | Neodymium iron boron magnetic powder crushing equipment |
| CN113927030A (en) * | 2021-09-09 | 2022-01-14 | 浙江英洛华磁业有限公司 | Neodymium iron boron rare earth permanent magnet orientation forming press |
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| JPS5967006A (en) * | 1982-10-08 | 1984-04-16 | Hitachi Ltd | Tablet forming machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506622A (en) * | 2013-09-29 | 2014-01-15 | 成都易态科技有限公司 | Isostatic compaction mould, compaction method utilizing mould and accessories of mould for powder sintering materials |
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| CN108723360A (en) * | 2018-06-22 | 2018-11-02 | 江门杰富意磁性材有限公司 | A kind of the molding press device and method of mesh shaped magnetic core |
| CN108723360B (en) * | 2018-06-22 | 2024-03-26 | 江门杰富意磁性材有限公司 | Forming and pressing equipment and method for mesh-shaped magnetic cores |
| CN110239141A (en) * | 2019-06-26 | 2019-09-17 | 浙江湾区机器人技术有限公司 | A kind of feeding device and charging process for various powders layering |
| CN111871489A (en) * | 2020-07-02 | 2020-11-03 | 潍坊潍液机械有限公司 | Neodymium iron boron magnetic powder crushing equipment |
| CN113927030A (en) * | 2021-09-09 | 2022-01-14 | 浙江英洛华磁业有限公司 | Neodymium iron boron rare earth permanent magnet orientation forming press |
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| CN102873325B (en) | 2014-11-05 |
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Address after: 315031 Cicheng Town West Gate, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Ketian Magnetic Industry Co.,Ltd. Patentee after: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. Address before: 315034, No. 1 West Chengxi Road, Ningbo, Zhejiang Patentee before: NINGBO KETIAN MAGNET Co.,Ltd. Patentee before: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. |