CN1674171A - Method for producing magnet, method for forming magnetic powder and dry type forming devie - Google Patents
Method for producing magnet, method for forming magnetic powder and dry type forming devie Download PDFInfo
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- CN1674171A CN1674171A CN 200510059509 CN200510059509A CN1674171A CN 1674171 A CN1674171 A CN 1674171A CN 200510059509 CN200510059509 CN 200510059509 CN 200510059509 A CN200510059509 A CN 200510059509A CN 1674171 A CN1674171 A CN 1674171A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 36
- 238000000465 moulding Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000005429 filling process Methods 0.000 claims abstract 4
- 230000007246 mechanism Effects 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 20
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
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- 229910052758 niobium Inorganic materials 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
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- 229910052772 Samarium Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 229910000765 intermetallic Inorganic materials 0.000 description 2
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- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
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- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明提供一种在干式成形中能够得到磁性粉末的高填充密度和高速的制造循环的磁体的制造方法、磁性粉末的成形方法以及干式成形装置。该制造方法具有填充工序和成形工序，其中所述填充工序是在将产生磁场的下模(2)配置于比预定的填充深度位置更上方的状态下，开始往凹模(3)内填充磁性粉末(G)，并一边填充磁性粉末(G)，一边使下模(2)相对于凹模(3)作相对移动直至达到填充深度位置；所述成形工序是在磁性粉末(G)的填充结束后的状态下，使上模(1)相对移动到凹模(3)内，从而在磁场中将磁性粉末(G)加压成形。
The present invention provides a magnet manufacturing method, a magnetic powder molding method, and a dry molding apparatus capable of obtaining a high packing density of magnetic powder and a high-speed manufacturing cycle in dry molding. This manufacturing method has a filling process and a forming process, wherein the filling process is to start filling the magnetic field (3) into the concave mold (3) in a state where the lower mold (2) generating a magnetic field is arranged above a predetermined filling depth position. powder (G), and while filling the magnetic powder (G), make the lower mold (2) move relative to the die (3) until reaching the filling depth position; the forming process is the filling of the magnetic powder (G) In the finished state, the upper mold (1) is relatively moved into the concave mold (3), so that the magnetic powder (G) is pressure-formed in the magnetic field.
Description
Technical field
The present invention relates to use the manufacture method of the magnets such as ferrimagnet of dry pressing method, the manufacturing process of Magnaglo and the dry pressing device that their use.
Background technology
Employed motor requires to have high-performance and want cube little, in light weight in the electric installation purposes of household appliances and automobile etc.Such motor is a direct current machine, and magnet uses the anisotropic ferrimagnet of dry pressing.This motor is handled to make through anisotropisation with magnet radially becomes easy magnetizing axis.
The manufacture method of the anisotropic ferrite magnet of this dry pressing, be under the situation of material with average grain diameter 1 μ m or following iron oxide micropowder, by metal pattern (counterdie) is applied magnetic field, filling to material helps out on the one hand, when press molding, keep state of orientation on the other hand along magnetic line of force direction, exert pressure simultaneously again, just make magnet keep the magnetic pole anisotropy by this, and product performance is improved.For example the spy opens flat 7-201558 communique (the 3rd～4 page), as shown in Figure 10, manufacture method based on the ferrimagnet of dry pressing is disclosed, in order to satisfy the desired characteristic of product, proposed the formation of metal pattern (patrix 1 and counterdie 2) and die (die: claim former, mortar mould again) 3 and shape etc. are carried out the scheme of optimal combination.
The metering of dusty material is to be undertaken by the volume weighing that utilizes the space in the cavity basically, for handling the micropowder of mobile extreme difference, as top narrate, the auxiliary filling in magnetic field is indispensable.For this reason, packed density being brought up to saturation condition just make the cavity internal pore reach minimum, is indispensable for stable (the reducing fluctuation) of filling weight, as the direct approach of being implemented, is to strengthen magnetic field intensity.
As the means that produce above-mentioned magnetic field, the general mode that applies direct current by the rectifier 4 that uses thyristor to coil 5 that adopts around metal pattern (die 3).In addition, after press molding finishes, apply the opposing magnetic field through adjusting, implement to take off magnetic to eliminate the residual flux of product, apply reverse current by above-mentioned rectifier 4 this moment.
In the past, behind the product of taking-up shaping end, counterdie 2 actions before were in holding state up to material service tank 6 by the cavity in the die 3 up to filling depth location (the extreme lower position degree of depth of cavity (shaping is distinguished)).Under this state, apply direct current by rectifier 4 to coil 5 when filling beginning then, make the counterdie 2 of kicker magnet produce magnetic field, thereby attract Magnaglo G.
Because metal pattern (patrix 1 and counterdie 2) is close up and down, the magnetic field intensity on the magnetic circuit increases, and is applied on the counterdie 2 with the auxiliary magnetic field that is filled to purpose and uses, so that only make one pole (the N utmost point or the S utmost point) near Magnaglo G.
Above-mentioned prior art is left over following problem.
In the past in order to improve packed density, apply higher direct current and be used for auxiliary magnetic field intensity of filling with raising, but aspect practical, compare with the source current that obtains the desired magnetic field intensity of product performance, this method need apply powerful significantly direct current (2～3 times).Yet when making output moment cutout of high electric current because of the above-mentioned reverse current that takes off magnetic, the load of rectifier (mainly being heating) strengthens, so running ability is limited, is difficult to realize the high speed that circulates.
Summary of the invention
The present invention finishes in view of above-mentioned problem, and its purpose is: the manufacture method of the magnet of a kind of high packed density that can access Magnaglo in dry pressing and the circulation of manufacturing at a high speed, the manufacturing process and the dry pressing device of Magnaglo are provided.
The present invention adopts following formation for solving above-mentioned problem.The manufacture method that is magnet of the present invention is characterised in that: this manufacture method has filling work procedure and forming process, wherein filling work procedure is under the counterdie that will produce magnetic field is disposed at than the state of predetermined filling depth location above more, beginning is filled Magnaglo in die, and fill Magnaglo on one side, Yi Bian counterdie is relatively moved until reaching the filling depth location with respect to die; Forming process is under the state behind the end-of-fill of Magnaglo, and patrix is relatively moved in the die, thus in magnetic field with the Magnaglo press molding.
The manufacturing process of Magnaglo of the present invention is characterised in that: this manufacturing process has filling work procedure and forming process, wherein filling work procedure is under the counterdie that will produce magnetic field is disposed at than the state of predetermined filling depth location above more, beginning is filled Magnaglo in die, and fill Magnaglo on one side, Yi Bian counterdie is relatively moved until reaching the filling depth location with respect to die; Forming process is under the state behind the end-of-fill of Magnaglo, and patrix is relatively moved in the die, thereby with the Magnaglo press molding.
The dry pressing device that dry type device of the present invention is the dry pressing Magnaglo is characterized in that, this dry pressing device has: can make the upper die and lower die relatively move with respect to die; Fill the powder filling mechanism of Magnaglo in from the top toward die; Make and produce mechanism from the magnetic field in counterdie generation magnetic field; And counterdie is equipped on when filling beginning than the predetermined filling depth location position of top more, on one side and fill counterdie is relatively moved until the mould travel mechanism that reaches the filling depth location with respect to die.
The manufacture method of these magnets, the manufacturing process of Magnaglo and dry pressing device, when filling beginning counterdie is equipped on the top of predetermined filling depth location (the extreme lower position degree of depth in the district that is shaped), even the magnetic field that is applied to like this in the counterdie is lower, also because counterdie near Magnaglo, thereby can attract Magnaglo effectively.Moreover while by filling counterdie is relatively moved until reaching the filling depth location with respect to die, the state that can keep attracting strongly Magnaglo is constant and with high packed density magnetic powder is filled in the die.
The manufacture method of magnet of the present invention preferably when filling beginning, makes the upper end of counterdie give prominence to and enter in the Magnaglo that fill from the upper surface of die.
Dry pressing device of the present invention is preferably: its powder filling mechanism has the material supply unit of accommodating Magnaglo and can fill Magnaglo from lower openings in die, and mould travel mechanism makes counterdie when filling beginning upper end is outstanding and it is entered in the Magnaglo in the material supply unit from the upper surface of die.
The manufacture method of these magnets and dry pressing device are when filling beginning, the upper end that makes counterdie is outstanding and it is entered in the magnetic powder from the upper surface of die, make counterdie directly contact Magnaglo like this, thereby can attract and fill Magnaglo more effectively.
The manufacture method of magnet of the present invention is characterised in that: Magnaglo is average grain diameter 1 μ m or following ferrimagnetism powder.
The manufacture method of this magnet is for being specially suitable with average grain diameter 1 μ m or following ferrimagnetism powder as the occasion of Magnaglo.
The manufacturing process of Magnaglo of the present invention is characterised in that: this manufacturing process has the filling work procedure that Magnaglo is filled into the fill area in the die from the top, and patrix is relatively moved in the die and with the forming process of Magnaglo press molding, wherein filling work procedure makes the fill area generation magnetic field in the die and sets its magnetic field intensity and make it to reach near the upper surface at die maximum when filling beginning, while fill Magnaglo magnetic field intensity is reached the below that maximum position moves down into fill area.
The manufacturing process of this Magnaglo makes the fill area in the die produce magnetic field and sets its magnetic field intensity and make it to reach near the upper surface at die maximum when filling beginning, therefore, at first Magnaglo is subjected to strong attraction near the upper surface of die, and then magnetic field intensity is reached the below that maximum position moves down into fill area while filling Magnaglo, so Magnaglo is on one side by the strong bottom that attracts to be filled into high density fill area on one side.
Dry pressing device of the present invention is characterised in that its magnetic field produces mechanism to have: around the coil of die; The kicker magnet portion that on counterdie, is provided with; And the upper end position of the counterdie when filling beginning, rectifier that the direct current that puts on coil is changed.
This dry pressing device is set direct current in order to obtain necessary and sufficient magnetic field intensity according to the upper end position of counterdie, can reduce the power consumption of rectifier by this, can seek to make simultaneously the high speed of circulation.
Can obtain following effect according to the present invention.
Promptly according to the manufacture method of magnet of the present invention, the manufacturing process and the dry pressing device of Magnaglo, the counterdie that will produce magnetic field when filling beginning is equipped on than the position of predetermined filling depth location above more, make counterdie move to the filling depth location while filling, therefore can Magnaglo be filled in the die with high packed density, can the generation electric current that magnetic field applied be reduced simultaneously.In addition, manufacturing process according to Magnaglo of the present invention, this method makes the fill area in the die produce magnetic field and sets its magnetic field intensity and reach maximum near the upper surface at die when filling beginning, and then magnetic field intensity is reached the below that maximum position moves down into fill area while filling Magnaglo, therefore from the filling initial stage to end-of-fill, Magnaglo is able to be attracted to strongly expeditiously fill area, thereby can fill Magnaglo with high density.
Thus, can carry out the shaping of high-quality Magnaglo, can keep good product performances such as magnet, can make simultaneously and make the circulation high speed.
Description of drawings
Fig. 1 is in the manufacturing process of the manufacture method of the magnet of an embodiment of the present invention, Magnaglo and dry pressing device, and the profile that the major part of action of the dry pressing device of this process constitutes is taken out in expression from press molding to the magnet formed body.
Fig. 2 is in an embodiment of the present invention, and the vertical view of major part formation of the state dry pressing device down of patrix is taken off in expression.
Fig. 3 is in an embodiment of the present invention, the profile that the major part of the action of the dry pressing device of this process constituted when expression magnet formed body took out the back to the filling beginning.
Fig. 4 is in an embodiment of the present invention, the profile that the major part of the action of the dry pressing device of this process constituted when expression began the back to end-of-fill from filling.
Fig. 5 is in an embodiment of the present invention, and expression is from the major part of the action of the dry pressing device of this process constitutes during to press molding behind the end-of-fill profile.
Fig. 6 is in an embodiment of the present invention, when the output of rectifier changes, and the curve chart of magnetic field intensity and product performance when the magnetic field intensity before expression is about to be shaped, filling.
Fig. 7 is in the example of prior art of the present invention, when filling with 100% rectifier power output, and the curve chart of expression magnetic field intensity analog result.
Fig. 8 is in the example of prior art of the present invention, when filling with 50% rectifier power output, and the curve chart of expression magnetic field intensity analog result.
Fig. 9 is in an embodiment of the present invention, when filling with 50% rectifier power output, and the curve chart of expression magnetic field intensity analog result.
Figure 10 is in the example of prior art of the present invention, the profile that the major part of the state of the dry pressing device when expression is filled constitutes.
Symbol description:
1: patrix; 2: counterdie; 2a: low punch (kicker magnet portion); 3: die (die); 4: rectifier; 5: coil; 6: material service tank (material supply unit); 8: the powder filling mechanism; 9: magnetic field produces mechanism; 10: mould travel mechanism; G: Magnaglo; K: the district is shaped
Embodiment
Below, with reference to figure 1～Fig. 6, describe with regard to the manufacture method of magnet of the present invention, the manufacturing process of Magnaglo and an embodiment of dry pressing device.
With the magnet that the manufacture method of the present embodiment is made, its section is a circular arc, is that it radially has the anisotropic arc dry pressing ferrimagnet (the arc magnet of so-called anisotropy) that is, and is to use the dry pressing device of following explanation to make.
As Fig. 1～shown in Figure 3, this dry pressing device is the building mortion that carries out dry pressing toward die (die) the 3 interior interior filling of shaping district K Magnaglo G in magnetic field, has die 3, can make the counterdie 2 and the patrix 1 that relatively move with respect to die 3, fill the powder filling mechanisms 8 of Magnaglo G in the past die 3 from the top, the magnetic field that makes counterdie 2 produce magnetic field produces mechanism 9, the mould travel mechanisms 10 such as hydraulic cylinder device that counterdie 2 and patrix 1 are moved with respect to die 3, and the orientation kicker magnet 11 of distinguishing a pair of rectangular shape that radially applies magnetic field of K in shaping.
Above-mentioned patrix 1 is constituted by the top drift 1a that adopts kicker magnet to constitute and towards the 1b of top nonmagnetic body portion that the district K that is shaped is arranged on top drift 1a downside.In addition, counterdie 2 is distinguished the 2b of the bottom nonmagnetic body portion formation that K is arranged on bottom drift 2a upside by bottom drift (kicker magnet portion) 2a that adopts kicker magnet to constitute and towards being shaped.In the present embodiment, counterdie 2 is fixed on the not shown framework, so mould travel mechanism 10 relatively moves the position of counterdie 2 by mobile die 3 and patrix 1.
Above-mentioned shaping district K is surrounded and is formed by the top nonmagnetic body 1b of portion, the bottom nonmagnetic body 2b of portion and die 3 in its protruding top mode towards downside.
In addition, bottom nonmagnetic body 2b of portion and the top nonmagnetic body 1b of portion, its centre is set thicklyer than both ends.This be because: the crosssection shape design of bottom nonmagnetic body 2b of portion and the top nonmagnetic body 1b of portion is become such shape, make near the end of magnet formed body orientation more towards the center by this, radially have excellent orientation thereby make, and magnetic characteristic is improved.In addition, between the bottom drift 2a that is made of kicker magnet and top drift 1a and Magnaglo G, because there is the low nonmagnetic body of permeability, thereby can avoid rapid flux change, the crackle when preventing to burn till produces, and improves qualification rate.
Moreover the nonmagnetic body 2b of portion in bottom is provided with planar portions near the centre, be designed to the structure that prevents that the center is blocked up.And the section configuration of the bottom nonmagnetic body 2b of portion can be following formation also: bottom and upper segment is respectively circular arc, and they are eccentric, perhaps the radius of curvature difference of bottom and upper segment.In addition, like this too for the top nonmagnetic body 1b of portion.
Although not necessarily, this top 1b of nonmagnetic body portion and the bottom nonmagnetic body 2b of portion obtain more good orientation, and the 2b of bottom nonmagnetic body portion preferably is set at least, if the 1b of top nonmagnetic body portion further is set, then orientation further improves.In addition, by these nonmagnetic bodies are set, the life-span of top drift 1a and bottom drift 2a is also prolonged.
The constituent material of bottom 2b of nonmagnetic body portion and the top nonmagnetic body 1b of portion has no particular limits, usually from such as selection in addition suitable magnetism-free stainless steel and no magnetic Si Taili (stellite) alloy.In addition, top drift 1a, bottom drift 2a and orientation can be made of magnetic materials such as S45C with kicker magnet 11.Die 3 can be made of non-magnetic superhard material etc.
Above-mentioned powder filling mechanism 8 has: accommodate Magnaglo G and can be from lower openings toward die 3 in fill the material service tank (material supply unit) 6 of Magnaglo G and on the die face (upper surface) of die 3, can make the mobile case travel mechanisms 12 such as hydraulic cylinder device of material service tank 6 advance and retreat.
As above-mentioned Magnaglo G, can use average grain diameter 1 μ m or following ferrimagnetism powder.
Above-mentioned magnetic field produces mechanism 9 and has the coil 5 of the configuration around die 3 and the rectifier 4 that applies direct current to this coil 5.This rectifier 4 is to use the rectifier of thyristor, may change the current value and the sense of current of direct current.The position of the counterdie 2 when particularly rectifier 4 is according to the filling beginning may change the electric current that applies, so that obtain necessary magnetic field intensity.
Above-mentioned a pair of orientation is separately positioned on the circumferential both sides of the district K that is shaped by die 3 with kicker magnet 11.
Secondly, just describe with reference to figure 1～Fig. 5 based on the manufacture method of the dry pressing ferrimagnet of above-mentioned dry pressing device.
At first, shown in Fig. 1 (a), after press molding finishes, on the opposite direction of the direct current that with press molding the time, applies by rectifier 4, coil 5 applied adjust the reverse current of offsetting residual flux and make it produce the opposing magnetic field, take off magnetic treatment.Then, shown in Fig. 1 (b), die 3 is moved downwards with respect to counterdie 2 and patrix 1, the magnet formed body S behind the press molding is projected upwards from the die face (upper surface) of die 3 by means of mould travel mechanism 10.Moreover, shown in Fig. 1 (c), patrix 1 is moved upward, as shown in Fig. 3 (a), take out magnet formed body S (demoulding).
Secondly, shown in Fig. 3 (b), make patrix 1 be in holding state up, move directly over counterdie 2 material service tank 6 by case travel mechanism 12 this moment on the die face of die 3.At this moment, counterdie 2 is in holding state below the die face of die 3, so that do not hinder moving of case travel mechanism 12.The lower openings of material service tank 6 be in fully counterdie 2 directly over state under make material service tank 6 stop to move, simultaneously shown in Fig. 3 (c), by means of mould travel mechanism 10 die 3 is moved downwards, counterdie 2 relatively moves upward with respect to die 3 like this, its upper end is just outstanding from the die face of die 3, enters the Magnaglo G in the material service tank 6.Under such state, make predetermined direct current flow through coil 5 by means of rectifier 4, thereby apply magnetic field, because in counterdie 2, produced high-intensity magnetic field, so Magnaglo G is attracted to counterdie 2.
Moreover, shown in Fig. 4 (a), applying to counterdie 2 under the state in magnetic field, die 3 is moved upward, counterdie 2 relatively moves downwards with respect to die 3 like this, shown in Fig. 4 (b), arrives predetermined filling depth location while counterdie 2 attracts Magnaglo G to descend.Promptly when filling beginning, counterdie 2 is moved upward, make near near the magnetic field intensity of the die face (the die face of fill area) of die 3 reach maximum by this, secondly, counterdie 2 is descended, the position that magnetic field intensity becomes maximum is moved to the below of fill area while fill Magnaglo G like this.Thus, shaping district (fill area) K in die 3 can fill Magnaglo G (filling work procedure) with high density.
Secondly, shown in Fig. 4 (c), the material service tank is retreated from the top of the district K that is shaped and enter holding state, shown in Fig. 5 (a), 5 (b) and 5 (c), by means of mould travel mechanism 10 patrix 1 is descended, the shaping district K between counterdie 2 and die 3 carries out press molding and makes magnet formed body S (forming process) Magnaglo G with predetermined pressurized conditions.At this moment, apply predetermined direct current to coil 5, the alignment magnetic field that produces with kicker magnet 11 by a pair of orientation can access anisotropic orientation and distinguish the radially consistent magnet formed body of K with being shaped.
Then, with reference to Fig. 1 (a), 1 (b) and 1 (c), with the above-mentioned the same magnet formed body that takes out.By this magnet formed body of sintering, can obtain the anisotropic ferrimagnet of circular arc.
In the present embodiment, when filling beginning counterdie 2 is equipped on than the predetermined filling depth location position of top more, even the magnetic field that is applied to like this in the counterdie 2 is lower, also owing to counterdie 2 near Magnaglo G, thereby can attract Magnaglo G effectively.Particularly make the upper end of counterdie 2 give prominence to and enter in the Magnaglo G from the die face of die 3, counterdie 2 directly contacts with Magnaglo G like this, thereby can attract and fill Magnaglo G more effectively.Moreover, while fill counterdie 2 is relatively moved until reaching the filling depth location with respect to die 3, the state that can keep attracting strongly Magnaglo G like this is constant and with high packed density Magnaglo G is filled in the die 3.
In addition,, set direct current, can reduce the power consumption of rectifier 4 by this, can seek to make simultaneously the high speed of circulation according to the upper end position of counterdie 2 in order to obtain necessary and sufficient magnetic field intensity.
[embodiment]
Secondly, carry out specific description by embodiment with regard to the manufacture method of magnet of the present invention and the manufacturing process of Magnaglo.
Manufacture method according to above-mentioned the present embodiment, change the direct current output (to call rectifier output in the following text) of the rectifier 4 when filling, make several magnet formed bodies S, when filling beginning, near the magnetic field intensity of the die 3 die face of fill area (magnetic field intensity during filling of the present invention: among the figure with * expression) and product performance (magnetic characteristic) (representing with among the figure) is as shown in Figure 6.In addition, the magnetic field intensity that influences before be about to being shaped of product performance also is shown in Fig. 6 (representing with ■ among the figure) in the lump.Magnetic field intensity before described be about to be shaped is that to be about to magnetropism powder G be that patrix 1 drops to magnetic field intensity under this state of die face position of die 3 behind the end-of-fill before exerting pressure to patrix 1.In addition, as a comparative example, with the same in the past, the position of the counterdie 2 in the time will filling beginning drops under the state of filling depth location fills, and the magnetic field intensity (magnetic field intensity when filling with prior art: represent with ◇ among the figure) of this moment also is shown in Fig. 6 in the lump.
As can be seen from Figure 6: reach capacity magnetic field intensity (representing with ■ among the figure) before needed be about to be shaped of product performance (representing with among the figure) is that rectifier is output as 50% or the magnetic field intensity when above.In addition, be output as at 100% o'clock at rectifier, the magnetic field intensity when filling with prior art (representing with ◇ among the figure) and rectifier are output as at 50% o'clock, the magnetic field intensity when filling with technology of the present invention (among the figure with * expression) is identical.Therefore, adopt manufacture method of the present invention, be output as at 50% o'clock at rectifier, magnetic density during available the filling is identical with the magnetic density of prior art when rectifier is output as 100% o'clock resulting filling, even in this case, also can access reach capacity magnetic field intensity before necessary be about to be shaped of product performance.Promptly according to the present invention, even rectifier is output as 50% occasion when filling, still can obtain the necessary magnetic field intensity of product performance and packed density, by reducing by half of rectifier output, can reduce the load that rectifier 4 is born significantly, make the high speed of product circulation become possibility.
Secondly, when filling beginning, under the situation that the prior art mode that is output as 100% with rectifier is filled, the analog result of its magnetic field intensity as shown in Figure 7.In addition, under the situation that the prior art mode that is output as 50% with rectifier is filled, the analog result of its magnetic field intensity as shown in Figure 8.Moreover, to fill in the mode of the present invention that is output as 50% with rectifier under the situation of (the new filling), the analog result of its magnetic field intensity is as shown in Figure 9.By these figure as can be known: be output as at rectifier under the situation of 50% mode of the present invention, can obtain the magnetic field intensity of 250mT (actual measurement 270mT) near the die face of fill area, it is identical that this numerical value and the rectifier of prior art mode are output as 100% situation.
So, by adopting the present invention, the forcing press running speed of dry pressing device compared with prior art can improve, and is 3 times of prior art, also can make production efficiency bring up to 3 times of prior art.In addition, the power consumption of rectifier 4 can reduce by 1/2, and 1 electric power that product consumed of every production can be controlled at 1/6 ((1/2) * (1/3)=1/6)).
In addition, technical scope of the present invention is not limited to above-mentioned each embodiment, as long as in the scope that does not break away from purport of the present invention, can make various changes.
For example,, the invention is not restricted to above-mentioned ferrite powder, go for rare earth magnetic powder as Magnaglo G.As rare earth magnetic powder, can be suitable for the R-TM-B based magnetic powder (R be a kind, 2 kinds of rare earth element or more than; TM:Fe or Fe and Co) and the R-Co based magnetic powder.At this, R has the notion that contains Y, can select a kind, 2 kinds or above selection among La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu and Y.Moreover, in order to improve coercive force, also can contain a kind, 2 kinds of elements such as Al, Cr, Mn, Mg, Si, Cu, C, Nb, Sn, W, V, Zr, Ti, Mo, Bi, Ag and Ga or more than.In addition, R-Co based magnetic powder a kind or above element and Co containing R and from Fe, Ni, Mn and Cr, select.At this moment, preferred a kind or the above element that further contains Cu or from Nb, Zr, Ta, Hf, Ti and V, select, a kind or above element especially preferably containing Cu and from Nb, Zr, Ta, Hf, Ti and V, select.In the middle of them, especially there is the intermetallic compound of Sm and Co, preferably with Sm
2Co
17Intermetallic compound is principal phase, exists with SmCo at crystal boundary
5It is the parafacies of main body.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP089597/2004 | 2004-03-25 | ||
| JP2004089597A JP2005277180A (en) | 2004-03-25 | 2004-03-25 | Magnet-manufacturing method, magnetic powder forming method and dry forming equipment |
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| Publication Number | Publication Date |
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| CN1674171A true CN1674171A (en) | 2005-09-28 |
| CN100392778C CN100392778C (en) | 2008-06-04 |
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| CNB2005100595094A Expired - Lifetime CN100392778C (en) | 2004-03-25 | 2005-03-25 | Magnet manufacturing method, magnetic powder molding method, and dry molding apparatus |
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| CN (1) | CN100392778C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102360908A (en) * | 2011-10-20 | 2012-02-22 | 和瑞电子(中山)有限公司 | A device for producing integrally formed inductors and its production method |
| CN107331500A (en) * | 2017-08-28 | 2017-11-07 | 佛山市顺德区江粉霸菱磁材有限公司 | One kind is used for special radial magnetic-field orientation forming module |
| CN112600318A (en) * | 2020-12-22 | 2021-04-02 | 湖南航天磁电有限责任公司 | Ferrite product capable of reducing motor tooth space torque and forming die thereof |
| CN117282963A (en) * | 2023-09-27 | 2023-12-26 | 华侨大学 | A magnetic field-assisted powder distribution device and method for filling mold cavities with magnetic powder |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007203577A (en) * | 2006-02-01 | 2007-08-16 | Tdk Corp | Machine for molding in magnetic field, molding die, method for molding in magnetic field |
| CN101867267B (en) * | 2010-05-24 | 2012-05-30 | 浙江西子富沃德电机有限公司 | Technology for manufacturing neodymium iron boron (NdFeB) magnetic tile used for radial oriented motor and moulding mould thereof |
| CN103418787A (en) * | 2012-04-23 | 2013-12-04 | 会田工程技术有限公司 | Method for high-density molding of mixed powder, and device for high-density molding |
| JP6689571B2 (en) | 2015-03-05 | 2020-04-28 | 信越化学工業株式会社 | Rare earth sintered magnet manufacturing method |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2777693B2 (en) * | 1993-12-29 | 1998-07-23 | ティーディーケイ株式会社 | Dry-formed ferrite magnet, method for producing the same, and dry-forming apparatus |
| JP2003203818A (en) * | 2001-10-31 | 2003-07-18 | Sumitomo Special Metals Co Ltd | Method of manufacturing permanent magnet and pressing apparatus |
-
2004
- 2004-03-25 JP JP2004089597A patent/JP2005277180A/en active Pending
-
2005
- 2005-03-25 CN CNB2005100595094A patent/CN100392778C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360908A (en) * | 2011-10-20 | 2012-02-22 | 和瑞电子(中山)有限公司 | A device for producing integrally formed inductors and its production method |
| CN107331500A (en) * | 2017-08-28 | 2017-11-07 | 佛山市顺德区江粉霸菱磁材有限公司 | One kind is used for special radial magnetic-field orientation forming module |
| CN107331500B (en) * | 2017-08-28 | 2024-02-23 | 佛山市顺德区江粉霸菱磁材有限公司 | Special radial magnetic field orientation forming die |
| CN112600318A (en) * | 2020-12-22 | 2021-04-02 | 湖南航天磁电有限责任公司 | Ferrite product capable of reducing motor tooth space torque and forming die thereof |
| CN117282963A (en) * | 2023-09-27 | 2023-12-26 | 华侨大学 | A magnetic field-assisted powder distribution device and method for filling mold cavities with magnetic powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005277180A (en) | 2005-10-06 |
| CN100392778C (en) | 2008-06-04 |
| HK1083932A1 (en) | 2006-07-14 |
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