CN1996514A - The method of the orientation profiling of the lanthanide permanent magnet and preparation device for the same - Google Patents
The method of the orientation profiling of the lanthanide permanent magnet and preparation device for the same Download PDFInfo
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- CN1996514A CN1996514A CN 200610168009 CN200610168009A CN1996514A CN 1996514 A CN1996514 A CN 1996514A CN 200610168009 CN200610168009 CN 200610168009 CN 200610168009 A CN200610168009 A CN 200610168009A CN 1996514 A CN1996514 A CN 1996514A
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Abstract
This invention relates to one rare each permanent part pressing and shaping method and its magnetic adding device and taking device, wherein, the shaping method comprises the following steps: top head presses the material case into magnetic powder into mode; top and down heads unmoved and negative mode elevates to fill powder into magnetic field; top head and negative mode unmoved, the top head presses into magnetic part; the negative mode drops till whole magnetic part outside negative mode; the top head elevates to push pull bar into finally product area; the materials add devices comprises materials case and barrel with changeable height.
Description
Technical field
The present invention relates to a kind of rare-earth permanent magnet briquetting process and compression molding device, particularly be used for the magnetic field orientating device and the feeding device of compression moulding.
Background technology
Rare-earth permanent magnet is divided into sintered rare-earth permanent magnetic body and binding rare earth permanent magnet, and sintered rare-earth permanent magnetic body greatly part is an anisotropy magnet.With the rare earth permanent magnet alloy powder end of loose condition (of surface) (hereinafter to be referred as " magnetic; average grain diameter: number μ m) place in the press die cavity; make it add magnetize magnetic field and pressure effect compacted under (compacting back volume is 35%～50% of the compacting front volume); the compression moulding of magnetic orientation is after the oversintering program becomes the sintered rare-earth permanent magnetic body, and for example the maximum magnetic energy product of Sintered NdFeB magnet is 280～400KJM
-3(35～50MGOe).Finish from beginning to be pressed into compacting, magnetic need be in the continuous magnetic field (magnetic field of magnetizing) that is not less than 1194KA/m (15000Oe) all the time, the sufficiently high magnetic field of magnetizing can guarantee that magnetic can be according to the direction magnetization and the marshalling in the magnetic field of magnetizing when its density is low, and the continuous magnetic field of magnetizing becomes in the process of product the direction of magnetization of magnetic gradually and remains unchanged in its effect of being stressed.The magnetic field of magnetizing makes the sintered rare-earth permanent magnetic chaeta base of compression moulding can have part remanent magnetism, cause its surface to attract magnetic easily, influence product quality, therefore need apply the remanent magnetism that 1 counter magnetic field (demagnetizing field) opposite with the magnetic direction that magnetizes reduces blank to sintered rare-earth permanent magnetic chaeta base, make it no longer to attract magnetic, the size of demagnetizing field need be according to the magnetic property of different magnetics and can be regulated.
Binding rare earth permanent magnet is that the mixture with magnetic and bonding agent places in the die cavity, makes its moulding under pressure, does not need again through the oversintering program.If magnetic is not subjected to adding the orientation effect in the magnetic field of magnetizing in the compression moulding process, become the isotropism binding rare earth permanent magnet after the compression moulding, magnetic property is lower, and for example the maximum magnetic energy product of isotropism Agglutinate neodymium-iron-boron magnet is 48～64KJM
-3(6～8MGOe).If magnetic is subjected to adding the orientation effect in magnetic field of magnetizing in the compression moulding process, become the anisotropic rare earth permanent magnet body after the compression moulding, its compression moulding process is with the compression moulding process of above-mentioned sintered rare-earth permanent magnetic body.The maximum magnetic energy product of anisotropic rare earth permanent magnet body is the several times of the isotropism binding rare earth permanent magnet made of same material, and for example the maximum magnetic energy product of anisotropic bond neodymium iron boron magnetic body can reach 200KJM
-3(25MGOe).
Pressing direction is vertical with the magnetic direction that magnetizes, in the rare-earth permanent magnet direction of magnetization of magnetic radially, the rare-earth permanent magnet of compression moulding is called radially oriented magnetic ring.Pressing direction is parallel with the magnetic direction that magnetizes, and the direction of magnetization of magnetic is parallel to each other in the rare-earth permanent magnet, and the rare-earth permanent magnet of compression moulding is called parallel-oriented magnet.Pressing direction is vertical with the magnetic direction that magnetizes, and the direction of magnetization of magnetic is parallel to each other in the rare-earth permanent magnet, and the rare-earth permanent magnet of compression moulding is called vertical orientated magnet.
Usually adopt following method that alignment magnetic field and reinforced is provided during prior art orientation compression moulding rare-earth permanent magnet:
1. rare earth permanent magnet oriontation compression moulding need be magnetized magnetic field more than 1194KA/m, the volume and the manufacturing cost that satisfy the prior art permanent magnetic circuits of this index surpass electromagnet, therefore all adopt electromagnet that magnetize magnetic field and demagnetizing field are provided in the prior art orientation compression molding device, the electromagnet volume is bigger, the press volume that holds electromagnet is also bigger, and the manufacturing cost of press is higher.Need consumed power during work of electromagnet, can produce temperature rise behind the electromagnet coil power, need take cooling way (oil cooling or water-cooled).Every compacting needs to consume more electric energy, equipment depreciation, artificial for 1 time.
2. gravitational method is reinforced, makes the self-dependent weight of magnetic enter die cavity.When some product of compression moulding, for example radially oriented magnetic ring, parallel-oriented magnet ring, vertical orientated tile-shaped magnet, the die cavity charge door is a narrow slit, magnetic is difficult to add in the narrow slit, magnetic in the die cavity also is difficult for being evenly distributed (skewness can influence product quality), the reinforced difficult automated production of adopting of gravitational method.
For above-mentioned reasons, the normally first compression moulding of Sintered NdFeB magnet that China's prior art is produced is 1 larger-size square or long cylinder magnet, processing method after overground, machine cuts, Wire EDM etc. again is processed into the product of suitable user's needs such as thin discs, elongate strip, annulus, watt shape.Material wastage rate is higher, back processing power consumption and manually also more.
The anisotropic radiation oriental magnetic ring can not adopt method for preparing, needs directly orientation compression moulding, and the small size anisotropic radiation oriental magnetic ring that the existing market requirement is bigger can't be produced in a large number because pressing cost is too high.For example the spindle motor of disc driver needs to use to be of a size of external diameter 20mm, internal diameter 18mm, and the radially oriented magnetic ring of height 13.5mm weighs 5 grams.Adopt the isotropism Agglutinate neodymium-iron-boron magnet at present, maximum magnetic energy product is 64KJM
-3(8MGOe), if use the anisotropic bond neodymium iron boron magnetic body instead, maximum magnetic energy product is 200KJM
-3(25MGOe), will increase substantially motor properties.But need magnetize magnetic field and demagnetizing field during the moulding of anisotropic bond neodymium iron boron magnetic body, the magnetic flux that forms radially oriented magnetic field must be closed by stem stem ability, for fear of making radially oriented magnetic field become parallel-oriented magnetic field because stem stem is saturated, the reinforced height of 1 compacting can only equal to encircle 1/2 (9mm) of internal diameter, highly be 4.5mm after the compression moulding, need just can finish above-mentioned radially oriented magnetic ring through 3 reinforced compactings.If adopt the above-mentioned radially oriented magnetic ring of press compression moulding of electromagnet, its production cost will be above the receptible price of user.
Summary of the invention
Bigger at electromagnet volume in the prior art, make the press volume also bigger, the electromagnet consuming electric power is more, and when die cavity was narrow slit, the reinforced magnetic that makes of gravitational method was difficult for adding wherein, is difficult for realizing automated production.The invention provides a kind of employing permanent magnetic circuits replacement electromagnet is orientated the compression moulding rare-earth permanent magnet and adopts seaming chuck that magnetic is pressed into the method that die cavity replaces gravitational method to feed in raw material.Compare with electromagnet, permanent magnetic circuits does not need electricity consumption, reduces power consumption; Do not generate heat, do not need to take cooling way; Do not have to rise and fall time on the required magnetic field of electromagnet, shorten the time of 1 product of compacting; Volume is less, dwindles press volume and manufacturing cost.With seaming chuck the method that magnetic is pressed into die cavity can be solved because the reinforced difficulty that the die cavity narrow slit causes helps being orientated the automated production of compression moulding.
5 steps such as that rare earth permanent magnet oriontation compression moulding process of the present invention comprises is reinforced, magnetize, suppress, demagnetization, the demoulding.
A. reinforced: it is characterized by with seaming chuck the magnetic in the magazine is pressed in the former, push-down head, former are motionless, and seaming chuck moves down, and magnetic is pressed in the former.
B. magnetize: it is characterized by by permanent magnetic circuits the enough magnetic field of magnetizing is provided, seaming chuck, push-down head are motionless, and former moves up, and magnetic are arranged in magnetize the permanent magnetic circuits working gas gap, and the direction of magnetization of magnetic is arranged according to the magnetic direction that magnetizes.
C. compacting: it is characterized by the magnetic field of magnetizing keep stablizing constant, and not free restriction, push-down head, former are motionless, seaming chuck is downward, is rare-earth permanent magnet with magnetic compression moulding.
D. demagnetization: it is characterized by by permanent magnetic circuits adjustable demagnetizing field is provided, push-down head, seaming chuck are motionless, and former moves down, and make the working gas gap of the rare-earth permanent magnet of compression moulding by the demagnetization permanent magnetic circuits, are demagnetized.
E. the demoulding: push-down head, seaming chuck are motionless, and former continues to move down, and deviates from from former up to whole rare-earth permanent magnet, moves on the seaming chuck, finishes the demoulding, pushes it against the finished product district with charging ram.
Magnetize permanent magnetic circuits, the demagnetization permanent magnetic circuits is fixed on the mould bases of press, be the part of former jointly, in whole process, push-down head remains invariant position, the compression moulding of rare-earth permanent magnet is finished in the action of dependence former and seaming chuck.
Feeding device in the orientation compression molding device of the present invention comprises magazine, feed bin, and when reinforced, magazine moves to the former top, and behind reinforced the end, magazine is got back to the feed bin below.It is characterized by: magazine is removable, can change the density of magnetic when beginning to suppress by selecting different magazine height for use, can realize auto feed.
Provide the permanent magnetic circuits that magnetizes in the magnetic field of magnetizing to comprise radially oriented magnetic ring compression moulding permanent magnetic circuits, parallel-oriented magnet compression moulding permanent magnetic circuits, the vertical orientated magnet compression moulding permanent magnetic circuits that magnetizes that magnetizes that magnetizes in the orientation compression molding device of the present invention, it is characterized by:
A. the radially oriented magnetic ring compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of opposite axial magnetized Sintered NdFeB magnet, 1 group of diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization.The magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux of every group of magnet, and the working point that helps designing every group of magnet makes full use of the magnetic property of magnet in maximum magnetic energy product, also helps reducing the leakage field of every group of magnet.Being distributed as of the magnetic line of force in the magnetic circuit: the magnetic line of force in the diametrical magnetization Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, wherein a part is through this diametrical magnetization Sintered NdFeB magnet is got back on core bar, external loop top down, another part is through this diametrical magnetization Sintered NdFeB magnet is got back to, the formation closed magnetic circuit in core bar, external loop bottom down; The magnetic line of force in the 1st group of axial magnetized Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, gets back to the 1st group of axial magnetized Sintered NdFeB magnet through core bar, external loop top down again, forms closed magnetic circuit; The magnetic line of force in the 2nd group of axial magnetized Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, gets back to the 2nd group of axial magnetized Sintered NdFeB magnet through core bar, external loop bottom down again, forms closed magnetic circuit.Working gas gap magnetic line of force direction radially, and is and vertical mutually with pressing direction, and working gas gap magnetic field is 1194～1592KA/m.Permanent magnetic circuits of the present invention is used the Sintered NdFeB magnet of 2 groups of axial magnetizeds and 1 group of diametrical magnetization simultaneously, when reaching the needed alignment magnetic field of compression moulding rare-earth permanent magnet, has reduced the magnetic circuit volume and has reduced the magnetic circuit cost.
B. the parallel-oriented magnet compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, 2 groups of opposite diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization of the direction of magnetization.The magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux of every group of magnet, and the working point that helps designing every group of magnet makes full use of the magnetic property of magnet in maximum magnetic energy product, also helps reducing the leakage field of every group of magnet.Being distributed as of the magnetic line of force in the magnetic circuit: the magnetic line of force in the 1st group of diametrical magnetization Sintered NdFeB magnet flows into working gas gap and following core bar by permeability magnetic material, seaming chuck, flow back to the 1st group of diametrical magnetization Sintered NdFeB magnet through push-down head, permeability magnetic material, the 2nd group of diametrical magnetization Sintered NdFeB magnet, external loop again, form closed magnetic circuit; The magnetic line of force in the 1st group of axial magnetized Sintered NdFeB magnet flows into working gas gap and following core bar by permeability magnetic material, seaming chuck, get back to the 1st group of axial magnetized Sintered NdFeB magnet through push-down head, permeability magnetic material, the 2nd group of axial magnet ring Sintered NdFeB magnet, external loop again, form closed magnetic circuit.Working gas gap magnetic line of force direction and pressing direction are parallel to each other, and working gas gap magnetic field is 1194～1592KA/m.Permanent magnetic circuits of the present invention is used the Sintered NdFeB magnet of 2 groups of axial magnetizeds and 2 groups of diametrical magnetizations simultaneously, when reaching the needed alignment magnetic field of compression moulding rare-earth permanent magnet, has reduced the magnetic circuit volume and has reduced the magnetic circuit cost.
C. the vertical orientated magnet compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, 2 groups of opposite diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization of the direction of magnetization.The magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux of every group of magnet, and the working point that helps designing every group of magnet makes full use of the magnetic property of magnet in maximum magnetic energy product, also helps reducing the leakage field of every group of magnet.Being distributed as of the magnetic line of force in the magnetic circuit: the magnetic line of force in the 1st group of axial magnetized Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, wherein a part is got back to the 1st group of axial magnetized Sintered NdFeB magnet through permeability magnetic material, the 2nd group of axial magnetized Sintered NdFeB magnet, external loop top, forms closed magnetic circuit; Another part is got back to the 1st group of axial magnetized Sintered NdFeB magnet through permeability magnetic material, the 2nd group of axial magnetized Sintered NdFeB magnet, external loop bottom, forms closed magnetic circuit; The magnetic line of force in the 1st group of diametrical magnetization Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, get back to the 1st group of diametrical magnetization Sintered NdFeB magnet through permeability magnetic material, the 2nd group of diametrical magnetization Sintered NdFeB magnet, external loop top again, form closed magnetic circuit; The magnetic line of force in the 1st group of diametrical magnetization Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, get back to the 1st group of diametrical magnetization Sintered NdFeB magnet through permeability magnetic material, the 2nd group of diametrical magnetization Sintered NdFeB magnet, external loop bottom again, form closed magnetic circuit.Working gas gap magnetic line of force direction is vertical mutually with pressing direction, and working gas gap magnetic field is 1194～1592KA/m.Permanent magnetic circuits of the present invention is used the Sintered NdFeB magnet of 2 groups of axial magnetizeds and 2 groups of diametrical magnetizations simultaneously, when reaching the needed alignment magnetic field of compression moulding rare-earth permanent magnet, has reduced the magnetic circuit volume and has reduced the magnetic circuit cost.
Provide the demagnetization permanent magnetic circuits of demagnetizing field to comprise radially oriented magnetic ring compression moulding demagnetization permanent magnetic circuits, parallel-oriented magnet compression moulding demagnetization permanent magnetic circuits, vertical orientated magnet compression moulding demagnetization permanent magnetic circuits, its feature in the orientation compression molding device of the present invention:
A. radially oriented magnetic ring compression moulding demagnetization permanent magnetic circuits: form by 1 group of diametrical magnetization Sintered NdFeB magnet, permeability magnetic material.The magnetic line of force in the diametrical magnetization Sintered NdFeB magnet, wherein a part flows into working gas gap by demagnetizing field intensity adjustments device, external loop top, following core bar, gets back to the diametrical magnetization Sintered NdFeB magnet through permeability magnetic material again, forms closed magnetic circuit; Another part flows into working gas gap by demagnetizing field intensity adjustments device, external loop bottom, following core bar, gets back to the diametrical magnetization Sintered NdFeB magnet through permeability magnetic material again, forms closed magnetic circuit.Working gas gap magnetic line of force direction radially, and is and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of radially oriented magnetic ring compression moulding.Working gas gap magnetic field can be regulated by demagnetizing field intensity adjustments device.
B. parallel-oriented magnet compression moulding demagnetization permanent magnetic circuits: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization.The magnetic line of force in the 1st group of axial magnetized Sintered NdFeB magnet flows into working gas gap and following core bar by permeability magnetic material, push-down head, get back to the 1st group of axial magnetized sintered NdFeB through seaming chuck, permeability magnetic material, the 2nd group of axial magnetized Sintered NdFeB magnet, external loop top, demagnetizing field adjusting device, external loop bottom again, form closed magnetic circuit.Working gas gap magnetic line of force direction and pressing direction are parallel to each other, and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of parallel-oriented magnet compression moulding.Working gas gap magnetic field can be regulated by demagnetizing field intensity adjustments device.
C. vertical orientated magnet compression moulding demagnetization permanent magnetic circuits: form by 2 groups of axial magnetized Sintered NdFeB magnets, permeability magnetic materials.The magnetic line of force in the 1st group of axial magnetized Sintered NdFeB magnet flows into working gas gap by permeability magnetic material, wherein a part is got back to the 1st group of axial magnetized Sintered NdFeB magnet through permeability magnetic material, the 2nd group of axial magnetized Sintered NdFeB magnet, demagnetizing field adjusting device one side, external loop top, demagnetizing field adjusting device another side, forms closed magnetic circuit; Another part is got back to the 1st group of axial magnetized Sintered NdFeB magnet through permeability magnetic material, the 2nd group of axial magnetized Sintered NdFeB magnet, demagnetizing field adjusting device one side, external loop bottom, demagnetizing field adjusting device another side, forms closed magnetic circuit.Working gas gap magnetic line of force direction is vertical mutually with pressing direction, and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of vertical orientated magnet compression moulding.Working gas gap magnetic field can be regulated by the demagnetizing field adjusting device.
Compared with prior art, provide magnetize magnetic field and demagnetizing field owing to replace electromagnet with permanent magnetic circuits in the orientation compression molding device, with seaming chuck magnetic is pressed into die cavity and replaces gravitational method reinforced, method provided by the present invention has following advantage:
1. energy-conservation, do not need consumed power during permanent magnetic circuits work, can not produce heat, so do not need cooling way yet.
2. save the press manufacturing cost, less than alternative electromagnet volume, the press volume also can dwindle the permanent magnetic circuits volume significantly significantly, can reduce the manufacturing cost of a complete set of orientation compression molding device.
3. help the automated production of rare earth permanent magnet oriontation compression moulding operation, utilize seaming chuck that magnetic is pressed in the die cavity, can make the orientation compression moulding process of rare-earth permanent magnet realize fully-automatic production, save manpower.
4. shorten the time of every product of compacting, because electromagnet rises on the magnetic field when magnetizing magnetic field and demagnetizing field and descends that each needs 1 second providing, during compacting, wait for that the magnetic field of magnetizing rises to maximum and could begin compacting, wait for after the magnetic field of magnetizing drops to 0 just providing demagnetizing field.Permanent magnetic circuits does not have on the magnetic field to rise and fall time, and product moves to the demagnetizing field required time and rises and the decline required time less than the magnetic field of electromagnet from the magnetic field of magnetizing in mould.
5. because above-mentioned 4 advantages have reduced by 1 rare-earth permanent magnet production cost of products of compression moulding, with the direct rare-earth permanent magnet product of compression moulding user required form and size of method provided by the present invention, reduce electric energy that back processing consumes, tool loss, back process equipment depreciation, artificial etc., also reduced the raw-material consumption of rare-earth permanent magnet.For example prior art production tile-shaped magnet is with 1 square of vertical orientated briquetting process compacting, with the line cutting square is processed into a watt shape then, and the line cutting processing consumes molybdenum filament, electric energy and artificial, forms more leftover bits simultaneously.Adopt the method provided by the present invention can the straight forming tile-shaped magnet, do not need also can not produce leftover bits through the line cutting processing.It is to produce 1 earlier than long cylinder that prior art is produced annulus, be processed into pipe with the method for drawing the hole then, be cut into the needed annulus thickness of user with inside diameter slicer or line again, draw the more rare-earth permanent magnet raw material of hole loss, section or line cutting processing also will consume more back processing charges.Method provided by the present invention can the straight forming ring magnet, does not need through drawing hole, section, line cutting processing, also can not produce to draw the hole and form the rare-earth permanent magnet material loss.
6. the reduction of radially oriented magnetic ring compression moulding cost makes production in enormous quantities anisotropy neodymium iron boron radially oriented magnetic ring become possibility.Radially oriented magnetic ring is mainly used in magneto, is widely used in industries such as automobile, air-conditioning, computer.Main now permanent-magnet ferrite and the isotropism Agglutinate neodymium-iron-boron of adopting produced radially oriented magnetic ring, and the magnetic energy product of permanent-magnet ferrite is 24KJM
-3(3MGOe), the magnetic energy product of isotropism Agglutinate neodymium-iron-boron is 64KJM
-3(8MGOe).If the sintered NdFeB and the anisotropic bond neodymium iron boron radially oriented magnetic ring that adopt method provided by the present invention to make, because the magnetic energy product of sintered NdFeB is 280～400KJM
-3(35MGOe～50MGOe), the magnetic energy product of anisotropic bond neodymium iron boron is 200KJM
-3(25MGOe), the volume of magneto can dwindle, and saves copper material and the steel of making motor, weight reduction.The radially oriented magnetic ring height of most of magneto needs compares near 1 or greater than 1 with diameter, the mould stem stem is magnetically saturated in the compression molding device influences because alignment magnetic field is subjected to, the magnetic field of magnetizing when guaranteeing to suppress is not less than 1194KA/m, the radially oriented magnetic ring height of each compression moulding can only need repeatedly reinforced compacting just can finish smaller or equal to the compression moulding of 1/4,1 radially oriented magnetic ring of diameter.But with method conservation of power of the present invention, shorten the press time, reduce production costs.And can avoid magnetic field to hinder magnetic and enter the reinforced difficulty that cavity impression causes, making feeds in raw material becomes easy.
Description of drawings
Fig. 1 (a) is the preceding standby condition schematic diagram of the compacting of radially oriented magnetic ring compression moulding process in the embodiment of the present invention, and Fig. 1 (b) is reinforced process schematic diagram
Fig. 2 (a)～(d) is the operation schematic diagram of the 1st, 2,3,4 compacting radially oriented magnetic ring.
Fig. 3 (a)～(c) is radially oriented magnetic ring demagnetization, the demoulding, be pushed to operation schematic diagrames such as finished product district.
Fig. 4 (a) is the permanent magnetic circuits structural representation that magnetizes in the radially oriented magnetic ring compression molding device, and Fig. 4 (b) is the radially oriented magnetic ring compression moulding magnetic line of force distribution map in the permanent magnetic circuits that magnetizes
Fig. 5 (a) is the demagnetization permanent magnetic circuits structural representation in the radially oriented magnetic ring compression molding device, and Fig. 5 (b) is magnetic line of force distribution map in the radially oriented magnetic ring compression moulding demagnetization permanent magnetic circuits
Fig. 6 (a)～(d) is operation schematic diagrames such as reinforced, the compression moulding, demagnetization, the demoulding of parallel-oriented magnet compression moulding process in the embodiment of the present invention.
Fig. 7 (a) is the permanent magnetic circuits structural representation that magnetizes in the parallel-oriented magnet compression molding device, and Fig. 7 (b) is the parallel-oriented magnet compression moulding magnetic line of force distribution map in the permanent magnetic circuits that magnetizes
Fig. 8 (a) is the demagnetization permanent magnetic circuits structural representation in the parallel-oriented magnet compression molding device, and Fig. 8 (b) is a magnetic line of force distribution map in the parallel-oriented magnet compression moulding demagnetization permanent magnetic circuits
Fig. 9 (a)～(d) is operation schematic diagrames such as reinforced, the compression moulding, demagnetization, the demoulding of vertical orientated magnet compression moulding process in the embodiment of the present invention.
Figure 10 (a) is the permanent magnetic circuits structural representation that magnetizes in the vertical orientated magnet compression molding device, and Figure 10 (b) is the vertical orientated magnet compression moulding permanent magnetic circuits magnetic line of force distribution map that magnetizes
Figure 11 (a) is the demagnetization permanent magnetic circuits structural representation in the vertical orientated magnet compression molding device, and Figure 11 (b) is vertical orientated magnet compression moulding demagnetization permanent magnetic circuits magnetic line of force distribution map
Embodiment
Example 1: suppress 1 height and diameter than the radially oriented magnetic ring concrete steps that are 1:
A, be depicted as standby condition before the radially oriented magnetic ring compacting as Fig. 1 (a), difference in height between the last plane of seaming chuck R1 lower plane and former R7 equals the height of magazine 3, the density that magnetic 8 will reach when beginning to suppress will determine the height of magazine 3, and the height of the big more then magazine 3 of density that needs is high more; The difference in height that last plane of former R7 this moment and push-down head R6 go up between the plane is the reinforced height of the 1st compacting magnet ring; Following core bar R5 goes up the plane and former R7 goes up the plane at same horizontal plane, and keeps relative position constant in whole pressing process.
B, shown in Fig. 1 (b) the reinforced process of radially oriented magnetic ring, at first, magazine 3 moves on to the top of former R7; Then, seaming chuck R1 is pressed into magnetic 8 in the former R7, realizes reinforced.
C, shown in Fig. 2 (a) the 1st radially oriented magnetic ring R9 of the 1st compacting, at first, seaming chuck R1 rises to the position of standby condition, magazine 3 is got back to feed bin 4 belows, prepares the 1st radially oriented magnetic ring R9 of compacting; Then, seaming chuck R1 is downward, up to the last plane of the lower plane of seaming chuck R1 and former R7 at same horizontal plane; Former R7, following core bar R5 move up simultaneously, make after the magnetic 8 process demagnetization permanent magnetic circuits R7B in the former R7, in the permanent magnetic circuits R7A working gas gap space of magnetizing; At this moment, former R7 and following core bar R5 stop motion, seaming chuck R1 moves downward, and magnetic 8 pressures are solid, and the 1st radially oriented magnetic ring R9 compacting finished.In the downward pressing process of seaming chuck R1, magnetic 8 is in the working gas gap space of the permanent magnetic circuits R7A that magnetizes all the time.
D, shown in Fig. 2 (b) the 2nd radially oriented magnetic ring R10 of the 2nd compacting, the 1st radially oriented magnetic ring R9 compacting is finished Hou and still is retained in the former R7, the b action before continuing to repeat is pressed into the magnetic 8 of equal volume in the former R7; Repeat the c action, make the magnetic 8 that just has been added into be arranged in the working gas gap of the permanent magnetic circuits R7A that magnetizes once more; Pressure is 5～7t/cm during compacting
2, the 2nd reinforced magnetic 8 directly is pressed into 1 the 2nd new radially oriented magnetic ring R10 with repressed the 1st radially oriented magnetic ring R9, the 2nd radially oriented magnetic ring R10 highly is 2 times of the 1st radially oriented magnetic ring R9 height
E, shown in Fig. 2 (c) the 3rd radially oriented magnetic ring R11 of the 3rd compacting, it is reinforced, compacting action and the 2nd radially oriented magnetic ring R10 reinforced, suppress identical.The 3rd radially oriented magnetic ring R11 highly is 3 times of the 1st radially oriented magnetic ring R9 height.
F, shown in Fig. 2 (d) the 4th compacting radially oriented magnetic ring R12, it is reinforced, compacting action and the 3rd radially oriented magnetic ring R11 reinforced, suppress identical.Radially oriented magnetic ring R12 highly is 4 times of the 1st radially oriented magnetic ring R9 height.At this moment, radially oriented magnetic ring R12 compression moulding.
G, radially oriented magnetic ring R12 demagnetization shown in Fig. 3 (a), at first seaming chuck R1, push-down head R6 keep motionless, former R7, following core bar R5 move down simultaneously, make the working gas gap space of the radially oriented magnetic ring R12 of compression moulding, finish demagnetization radially oriented magnetic ring R12 by demagnetization permanent magnetic circuits R7B.
H, the radially oriented magnetic ring R12 demoulding shown in Fig. 3 (b), at first, it is motionless that seaming chuck R1, push-down head R6 keep, and following core bar R5, former R7 move down simultaneously, go up the plane at same horizontal plane up to lower plane and the former R7 of radially oriented magnetic ring R12; Then, seaming chuck R1 moves up, and up to the last plane high 1mm of its lower plane than radially oriented magnetic ring R12, radially oriented magnetic ring R12 knockout course is finished.
I, shown in Fig. 3 (c) radially oriented magnetic ring R12 is pushed into finished product district 14, the radially oriented magnetic ring R12 that charging ram 13 will demagnetize is pushed into finished product district 14.
J, the permanent magnetic circuits R7A that magnetizes shown in Fig. 4 (a) in the radially oriented magnetic ring compression molding device, wherein seaming chuck R1, push-down head R6, R7A7, R7A8 are non-magnet material; Following core bar R5, external loop R7A4, R7A5, R7A6, R7A9 are permeability magnetic material; R7A1, R7A3 are the Sintered NdFeB magnet of axial magnetized, and R7A1 is opposite with the R7A3 direction of magnetization; R7A2 is the Sintered NdFeB magnet of diametrical magnetization.The magnetic line of force of the permanent magnetic circuits that magnetizes R7A distributes shown in Fig. 4 (b).
K, the demagnetization permanent magnetic circuits R7B shown in Fig. 5 (a) in the radially oriented magnetic ring compression molding device, wherein seaming chuck R1, push-down head R6, R7B3, R7B6 are non-magnet material; Following core bar R5, demagnetizing field intensity adjustments device R7B2, external loop R7B4, R7B5 are permeability magnetic material; R7B1 is the Sintered NdFeB magnet of diametrical magnetization, and the direction of magnetization is opposite with R7A2.The magnetic line of force of demagnetization permanent magnetic circuits R7B distributes shown in Fig. 5 (b).
The compression moulding external diameter be 44mm, internal diameter be 40mm, during highly for the radially oriented magnetic ring R12 of 44mm, the working gas gap magnetic field of the permanent magnetic circuits that magnetizes R7A can reach 1194KA/m, its overall dimension is long 150mm, wide 150mm, high 80mm; Demagnetization permanent magnetic circuits R7B working gas gap magnetic field is adjustable.Its overall dimension is long 150mm, wide 150mm, high 50mm.
The radially oriented electromagnet overall dimension of the radially oriented magnetic ring of orientation compression moulding same size is long 588mm, wide 508mm, high 462mm.Feed in raw material, be orientated 1 power consumption of compression moulding, 0.025 degree, reinforced, orientation compression moulding is total to power consumption 0.1 for 4 times and spends.Rise on the magnetic field because magnetize and descend that each needs 1 second, 4 time reinforced, orientation compression moulding increases the rising and the decline in the magnetic field that was used in 8 seconds to magnetize.Because heating, electromagnet needs water-cooled.1 press needs 2 people operation, 1 people's weighing, and 1 people feeds in raw material and takes finished product away.
Example 2: the concrete steps of 1 parallel-oriented magnet of compacting:
L, the press standby condition before the parallel-oriented magnet of compacting is identical when suppressing radially oriented magnetic ring.Reinforced process parallel-oriented magnet shown in Fig. 6 (a) is reinforced, and the density that magnetic 8 will reach when beginning to suppress will determine the height of magazine 3, and the height of the big more then magazine 3 of density that needs is high more.At first, magazine 3 moves on to the top of former P7; Then, seaming chuck P1 is pressed into magnetic 8 in the former P7, realizes reinforced.
M, shown in Fig. 6 (b) pressing process of parallel-oriented magnet P9, at first, seaming chuck P1 rises to the position of standby condition, magazine 3 is got back to feed bin 4 belows; Then, seaming chuck P1 is downward, up to the last plane of the lower plane of seaming chuck P1 and former P7 at same horizontal plane; Former P7, following core bar P5 move up simultaneously, make after the magnetic 8 process demagnetization permanent magnetic circuits P7B in the former P7, in the permanent magnetic circuits P7A working gas gap space of magnetizing; At this moment, former P7 and following core bar P5 stop motion, seaming chuck P1 moves downward, and magnetic 8 pressures are solid, and parallel-oriented magnet P9 compacting is finished.In the downward pressing process of seaming chuck P1, magnetic 8 is in the working gas gap space of the permanent magnetic circuits P7A that magnetizes all the time.
N, parallel-oriented magnet P9 demagnetization shown in Fig. 6 (c), at first, it is motionless that seaming chuck P1, push-down head P6 keep, former P7, following core bar P5 move down simultaneously, make the working gas gap space of the parallel-oriented magnet P9 of compression moulding, finish demagnetization parallel-oriented magnet P9 by demagnetization permanent magnetic circuits P7B.
O, the parallel-oriented magnet P9 demoulding shown in Fig. 6 (d), at first, it is motionless that seaming chuck P1, push-down head P6 keep, and following core bar P5, former P7 move down simultaneously, go up the plane at same horizontal plane up to lower plane and the former P7 of parallel-oriented magnet P9; Then, seaming chuck P1 moves up, and up to the last plane high 1mm of its lower plane than parallel-oriented magnet P9, parallel-oriented magnet P9 knockout course is finished.
P, the permanent magnetic circuits P7A that magnetizes shown in Fig. 7 (a) in the parallel-oriented magnet P9 compression molding device, wherein descending core bar P5D, P7A6, P7A8, P7A10 is non-magnet material; Seaming chuck P1, following core bar P5C, following core bar P5E, push-down head P6, external loop P7A4, P7A7, P7A9 are permeability magnetic material; P7A1, P7A5 are the Sintered NdFeB magnet of axial magnetized, and P7A1 is identical with the P7A5 direction of magnetization; P7A2, P7A3 are the Sintered NdFeB magnet of diametrical magnetization, and P7A2 is opposite with the P7A3 direction of magnetization.The magnetic line of force of the permanent magnetic circuits that magnetizes P7A distributes shown in Fig. 7 (b).
Q, the demagnetization permanent magnetic circuits P7B shown in Fig. 8 (a) in the parallel-oriented magnet P9 compression molding device, wherein descending core bar P5B, P7B2, P7B5, P7B9 is non-magnet material; Seaming chuck P1, following core bar P5A, following core bar P5C, push-down head P6, external loop P7B4, demagnetizing field intensity adjustments device P7B6, P7B7, P7B8 are permeability magnetic material; P7B1, P7B3 are the Sintered NdFeB magnet of axial magnetized, and P7B1 is identical with the P7B3 direction of magnetization, and P7B1 is opposite with the P7A1 direction of magnetization, and P7B3 is opposite with the P7A5 direction of magnetization.The magnetic line of force of demagnetization permanent magnetic circuits P7B distributes shown in Fig. 8 (b).
When the compression moulding external diameter was the parallel-oriented magnet P9 of 100mm, reinforced height was as shown in table 1 with the permanent magnetic circuits P7A working gas gap magnetic field parameter that magnetizes, and its overall dimension is long 350mm, wide 350mm, high 350mm; The working gas gap magnetic field of demagnetization permanent magnetic circuits P7B is adjustable, and its overall dimension is long 350mm, wide 350mm, high 150mm.
The parallel-oriented electromagnet overall dimension of the parallel-oriented magnet of orientation compression moulding same size is long 548mm, wide 548mm, high 500mm.Reinforced, 1 power consumption of orientation compression moulding, 0.1 degree.Rise on the magnetic field because magnetize and descend that each needs 1 second, 1 time reinforced, orientation compression moulding increases the rising and the decline in the magnetic field that was used in 2 seconds to magnetize.Because heating, electromagnet needs oil cooling.1 press needs 2 people operation, 1 people's weighing, and 1 people feeds in raw material and takes finished product away.
The reinforced height of the parallel-oriented compression moulding of table 1 and the permanent magnetic circuits working gas gap magnetic field parameter that magnetizes
| The reinforced height of magnetic (mm) | 15 | 20 | 25 | 30 | 35 | 40 | 50 |
| Former working gas gap magnetic field (KA/m) | 1847 | 1719 | 1600 | 1528 | 1393 | 1329 | 1138 |
Example 3: the concrete steps of 1 vertical orientated magnet of compacting:
R, the press standby condition before the vertical orientated magnet of compacting is identical when suppressing radially oriented magnetic ring.Reinforced process vertical orientated magnet shown in Fig. 9 (a) is reinforced, and the density that magnetic 8 will reach when beginning to suppress will determine the height of magazine 3, and the height of the big more then magazine 3 of density that needs is high more.At first, magazine 3 moves on to the top of former V7; Then, seaming chuck V1 is pressed into magnetic 8 in the former V7, realizes reinforced.
S, shown in Fig. 9 (b) pressing process of vertical orientated magnet V9, at first, seaming chuck V1 rises to the position of standby condition, magazine 3 is got back to feed bin 4 belows; Then, seaming chuck V1 moves down, up to the last plane of the lower plane of seaming chuck V1 and former V7 at same horizontal plane; At this moment, former V7 moves up, and makes after the magnetic 8 process demagnetization permanent magnetic circuits V7B in the former V7, in the permanent magnetic circuits V7A working gas gap space of magnetizing; At this moment, former V7 stop motion, seaming chuck V1 moves downward, and magnetic 8 pressures are solid, and vertical orientated magnet V9 compacting is finished.In the downward pressing process of seaming chuck V1, magnetic 8 is in the working gas gap space of the permanent magnetic circuits V7A that magnetizes all the time.
T, vertical orientated magnet V9 demagnetization shown in Fig. 9 (c), at first, it is motionless that seaming chuck V1, push-down head V6 keep, and former V7 moves down, make the working gas gap space of the vertical orientated magnet V9 of compression moulding, finish demagnetization vertical orientated magnet V9 by demagnetization permanent magnetic circuits V7B.
U, the vertical orientated magnet V9 demoulding shown in Fig. 9 (d), at first, it is motionless that seaming chuck V1, push-down head V6 keep, and former V7 moves down, and goes up the plane at same horizontal plane up to lower plane and the former V7 of vertical orientated magnet V9; Then, seaming chuck V1 moves up, and up to the last plane high 1mm of its lower plane than vertical orientated magnet V9, vertical orientated magnet V9 knockout course is finished.
V, the permanent magnetic circuits V7A that magnetizes shown in Figure 10 (a) in the vertical orientated magnet compression molding device, wherein seaming chuck V1, push-down head V6, V7A1, V7A6, V7A7, V7A11 are non-magnet material; External loop V7A4, V7A5, V7A9 are permeability magnetic material; V7A3, V7A10 are the Sintered NdFeB magnet of axial magnetized, and V7A3 is identical with the V7A10 direction of magnetization; V7A2, V7A8 are the Sintered NdFeB magnet of diametrical magnetization, and V7A2 is opposite with the V7A8 direction of magnetization.The magnetic line of force of the permanent magnetic circuits that magnetizes V7A distributes shown in Figure 10 (b).
W, the demagnetization permanent magnetic circuits V7B shown in Figure 11 (a) in the vertical orientated magnet compression molding device, wherein seaming chuck V1, push-down head V6, V7B1, V7B2, V7B6, V7B7, V7B8, V7B9, V7B13, V7B14 are non-magnet material; Demagnetizing field intensity adjustments device V7B12, external loop V7B4, V7B5, V7B10 are permeability magnetic material; V7B3, V7B11 are the Sintered NdFeB magnet of axial magnetized, and V7B3 is identical with the V7B11 direction of magnetization, and V7B3 is opposite with the V7A3 direction of magnetization, and V7B11 is opposite with the V7A10 direction of magnetization.The magnetic line of force of demagnetization permanent magnetic circuits V7B distributes shown in Figure 11 (b).
When compression moulding added the vertical orientated magnet of the long 150mm of material space, wide 150mm, reinforced spatial orientation length was as shown in table 2 with the permanent magnetic circuits V7A working gas gap magnetic field parameter that magnetizes, and its overall dimension is long 400mm, wide 400mm, high 400mm. Demagnetization permanent magnetic circuits V7B working gas gap magnetic field is adjustable, and its overall dimension is long 400mm, wide 400mm, high 100mm
The vertical orientated electromagnet overall dimension of the vertical orientated magnet of orientation compression moulding same size is long 552mm, wide 630mm, high 510mm.Reinforced, 1 power consumption of orientation compression moulding, 0.1 degree.Rise on the magnetic field because magnetize and descend that each needs 1 second, 1 time reinforced, orientation compression moulding increases the rising and the decline in the magnetic field that was used in 2 seconds to magnetize.Because heating, electromagnet needs oil cooling.1 press needs 2 people operation, 1 people's weighing, and 1 people feeds in raw material and takes finished product away.
The reinforced spatial orientation length of the vertical orientated compression moulding of table 2 and the permanent magnetic circuits working gas gap magnetic field parameter that magnetizes
| Orientation length (mm) | 40 | 50 | 60 |
| Former working gas gap magnetic field (KA/m) | 1449 | 1313 | 1178 |
Claims (4)
1.1 plant the orientation briquetting process of rare-earth permanent magnet: push-down head, former is motionless, seaming chuck is pressed into the magnetic in the magazine in the former, then, push-down head, seaming chuck is motionless, former moves up, make magnetic be positioned at the magnetic field of magnetizing, the direction of magnetization of magnetic is arranged according to the direction in the magnetic field of magnetizing, at this moment, push-down head and former are motionless, seaming chuck is a magnet with magnetic compression moulding downwards, seaming chuck, push-down head is motionless, and former moves down, make the magnet of compression moulding pass through demagnetizing field, magnet is demagnetized, seaming chuck, it is motionless that push-down head still keeps, and former continues to move down, be positioned at outside the former until whole magnet, move on the seaming chuck, with charging ram magnet be pushed into the finished product district subsequently, it is characterized in that:
A. seaming chuck is pressed into the magnetic in the magazine in the former;
B. the magnetic field of magnetizing is provided by the permanent magnetic circuits that magnetizes;
C. demagnetizing field is provided by the demagnetization permanent magnetic circuits;
2. for realizing the feeding device of claim 1, comprise magazine, feed bin, when reinforced, magazine moves to the former top, behind reinforced the end, magazine is got back to the feed bin below, and it is characterized in that: magazine is removable, by selecting for use different magazine height can change the density of magnetic when beginning to suppress, can realize auto feed;
3. for realizing that claim 1 provides the device in the magnetic field of magnetizing, be radially oriented magnetic ring compression moulding permanent magnetic circuits, parallel-oriented magnet compression moulding permanent magnetic circuits, the vertical orientated magnet compression moulding permanent magnetic circuits that magnetizes that magnetizes that magnetizes, it is characterized in that:
A. the radially oriented magnetic ring compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of opposite axial magnetized Sintered NdFeB magnet, 1 group of diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization, the magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux and the leakage field of every group of magnet, and working gas gap magnetic line of force direction radially, and is and vertical mutually with pressing direction, and working gas gap magnetic field is 1194～1592KA/m;
B. the parallel-oriented magnet compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, 2 groups of opposite diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization of the direction of magnetization, the magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux and the leakage field of every group of magnet, and working gas gap magnetic line of force direction and pressing direction are parallel to each other, and working gas gap magnetic field is 1194～1592KA/m;
C. the vertical orientated magnet compression moulding permanent magnetic circuits that magnetizes: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, 2 groups of opposite diametrical magnetization Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization of the direction of magnetization, the magnetic line of force major part that the use in conjunction of axial magnetized and diametrical magnetization Sintered NdFeB magnet produces them flows to working gas gap, has reduced the leakage field of the permeability magnetic material on working gas gap next door; The magnetic flux of working gas gap is provided jointly by many groups Sintered NdFeB magnet, has reduced the magnetic flux and the leakage field of every group of magnet, and working gas gap magnetic line of force direction is vertical mutually with pressing direction, and working gas gap magnetic field is 1194～1592KA/m;
4. for realizing that claim 1 provides the device of demagnetizing field, be radially oriented magnetic ring compression moulding demagnetization permanent magnetic circuits, parallel-oriented magnet ring compression moulding demagnetization permanent magnetic circuits, vertical orientated square compression moulding demagnetization permanent magnetic circuits, it is characterized in that:
A. radially oriented magnetic ring compression moulding demagnetization permanent magnetic circuits: form by 1 group of diametrical magnetization Sintered NdFeB magnet, permeability magnetic material, working gas gap magnetic line of force direction radially, and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of radially oriented magnetic ring compression moulding, working gas gap magnetic field can be regulated by demagnetizing field intensity adjustments device;
B. parallel-oriented magnet compression moulding demagnetization permanent magnetic circuits: form by 2 groups of identical axial magnetized Sintered NdFeB magnet, permeability magnetic materials of the direction of magnetization, working gas gap magnetic line of force direction and pressing direction are parallel to each other, and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of parallel-oriented magnet compression moulding, working gas gap magnetic field can be regulated by demagnetizing field intensity adjustments device;
C. vertical orientated magnet compression moulding demagnetization permanent magnetic circuits: form by 2 groups of axial magnetized Sintered NdFeB magnets, permeability magnetic materials, working gas gap magnetic line of force direction is vertical mutually with pressing direction, and opposite with the magnetize magnetic line of force direction of permanent magnetic circuits working gas gap of vertical orientated magnet compression moulding, working gas gap magnetic field can be regulated by the demagnetizing field adjusting device.
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