TWI460750B - Electromagnetic drive compacting device and magnet manufacturing method - Google Patents

Description

Electromagnetic drive compacting device and magnet manufacturing method

The present invention relates to a compacting apparatus and method, and more particularly to a compacting apparatus and method using electromagnetic transmission.

At present, the manufacturing process of a general permanent magnet is to pulverize, align, pressurize, heat treat the magnet raw material, and finally perform sintering to complete the magnet. The pulverization of the magnet raw material is carried out by crushing the magnet raw material into a size of about 200 μm by a masher or a pulverizer, and then the coarsely pulverized magnet powder is finely pulverized by a jet mill to have a specific size or less. (for example, 0.1 μm to 5.0 μm) of a fine powder having an average particle diameter.

The process of aligning and pressurizing is to put the finely pulverized magnet powder into a mold, on the one hand, applying a magnetic field to the magnet powder from the outside, and on the other hand, extruding the magnet powder into a desired shape.

The heat treatment is performed by holding the molded body formed by the powder molding at 200 ° C to 900 ° C for several hours (for example, 5 hours) in a hydrogen atmosphere, thereby performing a pre-burning treatment in hydrogen. In the hydrogen calcination treatment, so-called decarburization which thermally decomposes the organometallic compound to reduce the amount of carbon in the calcined body is performed. Further, the calcination treatment in hydrogen is carried out under the condition that the amount of carbon in the calcined body is less than 0.2 wt%, more preferably less than 0.1 wt%. Thereby, the permanent magnet can be densely sintered by the subsequent sintering treatment without deteriorating the residual magnetic flux density or coercive force.

The final sintering operation is to burn the shaped body which is pre-fired in hydrogen. Knot processing. In addition, as a method of sintering the molded body, in addition to general vacuum sintering, pressure sintering or the like may be performed by sintering the molded body in a state of being pressed.

U.S. Patent Publication No. US20100310408 discloses an alignment and pressurizing device for a permanent magnet that performs magnetic field alignment in a magnetic field after filling the raw material powder in a filling chamber. At this time, for the raw material powder in the filling chamber, for example, the pressing means is pressed and adhered at a specific pressure from the same direction as the filling direction of the filling type raw material powder. Here, the area of the contact surface (pressing surface) between the pressing means and the raw material powder is set to be smaller than the cross-sectional area of the filling chamber, so that the pressing means is used for the raw material powder. When the pressure is adhered, the raw material powder is pushed back in the space between the pressing means and the inside of the filling chamber. Then, in the combination of crystal breaks in the direction of alignment of the magnetic field, the crystal breaks having a more uniform crystal orientation relationship are more likely to be combined, and if the crystal breaks having the same crystal orientation relationship are combined, A strong bond chain is formed, whereby the crystal break faces are joined and aligned without voids in the direction of the magnetic field alignment. Then, by compressing the crystal break surface in the direction of the magnetic field alignment and joining them without voids, the high-density permanent magnet having no misalignment is obtained, and a high-performance magnet can be obtained.

US Patent Publication No. US20100034688 discloses that when the alloy raw material powder is subjected to magnetic field alignment, since the alloy raw material powder is stirred in the filling chamber while applying a magnetic field, the positional relationship between the particles of the alloy raw material powder in the filling chamber is filled. Crystallization of the alloy raw material powder having a more uniform crystal orientation relationship when the state in the filling chamber is changed There are more opportunities for the rupture surface to be combined.

However, the orientation direction and the pressing direction of the permanent magnet disclosed in the patent US20100310408 and the patent US20100034688 are perpendicular to each other, so the shape of the magnet will be limited. The alignment and pressurization devices of the permanent magnets described above are additionally subjected to a magnetic powder pressurization step by a complicated mechanical structure magnetic powder pressurizing device (for example, a complicated mechanical structure of a hydraulic drive device). Furthermore, the alignment and pressurization devices of the permanent magnets described above are respectively required to supply energy to the coil and the magnetic powder pressurizing device, and the steps of magnetic powder alignment and magnetic powder pressurization cannot be performed with a single energy source.

An alignment and pressurizing device for permanent magnets in Taiwan Patent Publication No. TW201201226. A pair of magnetic field generating coils are disposed above and below the cavity, and magnetic lines of force are applied to the magnet powder filled into the cavity. The magnetic field to be applied is set to, for example, 1 MA/m. Then, in the case of powder compaction, the dried magnet powder is first filled into the cavity. Thereafter, the lower punch and the upper punch are driven to apply pressure to the magnet powder filled in the cavity in the direction of the arrow. Further, at the same time as the pressurization, the magnetic field of the magnet powder filled in the cavity is applied by the magnetic field generating coil in the direction of the arrow parallel to the pressing direction. However, the magnetic lines of force generated by this design method are easily parabolic, and the difference in the coils at each position of the magnet causes unevenness of the magnetic force on the same plane.

The alignment and pressurization devices of the permanent magnets described above are additionally subjected to a magnetic powder pressurization step by a complicated mechanical structure magnetic powder pressurizing device (for example, a complicated mechanical structure of a hydraulic drive device). Furthermore, the aforementioned permanent magnet The alignment and pressurization devices of the stone must separately supply energy to the coil and the magnetic powder pressurizing device, and the steps of magnetic powder alignment and magnetic powder pressurization cannot be performed with a single energy source.

Therefore, there is a need to provide a device for manufacturing a magnet and a method for manufacturing a magnet to solve the aforementioned problems.

It is an object of the present invention to provide an apparatus and method for rapidly pressing a magnet.

In order to achieve the above object, the present invention provides an electromagnetic transmission compacting device comprising: a compacting die comprising a cavity for filling a magnetic powder; a magnetic field generating unit comprising a coil, wherein a pulse When the electrical signal flows through the coil, a strong magnetic field is generated in the cavity, and the magnetic powder in the cavity is aligned; a magnetic conductive block is disposed outside the coil, wherein the pulse is electrically When the signal flows through the coil, a mutual repulsive force is generated between the coil and the magnetic conductive block, and a lateral force is generated on the magnetic conductive block; and a transmission mechanism includes a compacting slider, wherein the transmission mechanism The lateral force of the magnetic conductive block is converted into a longitudinal force of the compacting slider, and the longitudinal force of the compacting slider is pressure-molded to the magnetic powder.

In order to achieve the above object, a method for manufacturing a magnet includes the steps of: pouring a magnetic powder into a cavity; using the pulse electrical signal to flow through a coil to generate a strong magnetic field in the cavity, and The magnetic powder in the hole generates an alignment arrangement; and the strong magnetic field is generated, so that a mutual repulsive force is generated between the coil and a magnetic conductive block, and a horizontal cross is generated for the magnetic conductive block. The force is applied and the lateral force of the magnetic block is converted into a force of a compacting slider to pressurize the magnetic powder.

The electromagnetic transmission compacting device and method of the invention only need to provide a single energy source to the pulse electrical signal on the coil, so that the magnetic powder alignment and the magnetic powder pressing step can be simultaneously performed, thereby quickly pressing the magnet, saving energy, and reducing the process cost. . Furthermore, the electromagnetic transmission compacting device of the present invention has a simple mechanical structure, and does not require a separate step of magnetic powder pressurization by a magnetic powder pressing device of a complicated mechanical structure.

The above and other objects, features, and advantages of the present invention will become more apparent from the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the electromagnetic transmission compacting device 100 of the first embodiment of the present invention comprises: a compacting die 110, a magnetic field generating unit 120, a magnetic guiding block 130 and a transmission mechanism 140. In this embodiment:

The compacting die 110 includes a cavity 111 for filling the magnetic powder 150. The receiving space of the cavity 111 is shaped to press the magnetic powder 150.

The magnetic field generating unit 120 includes a coil 121 that surrounds the cavity 111 in a clockwise or counterclockwise direction. When a pulse of electrical signals (such as a pulse current) flows through the coil 121, a strong magnetic field is generated in the cavity 111. And aligning the magnetic powder 150 in the cavity 111.

The magnetic conductive block 130 is disposed on the outer side of the coil 121. When the pulse electrical signal flows through the coil 121, the magnetic conductive block 130 generates an eddy current simultaneously due to the principle of electromagnetic induction, because the current direction of the eddy current and the coil 121 The current directions are opposite, such that a coil is generated between the coil 121 and the magnetic conductive block 130. Mutually repulsive, and a lateral force is generated on the magnetic conductive block 130.

The transmission mechanism 140 includes a first slider 141, a second slider 142 and a compacting slider 143. The first slider 141 is disposed on the right side of the magnetic conductive block 130 for converting the lateral force of the magnetic conductive block 130 into the longitudinal force of the first slider 141, and the movement of the first slider 141 when the magnetic powder is pressed. The direction is upward and the second slider 142 is pushed. The second slider 142 is disposed at a moving direction of the first slider 141, and changes the longitudinal force of the first slider 141 to the lateral force of the second slider 142 when pushed by the first slider 141. For example, when the magnetic powder is pressed, the moving direction of the second slider 142 may be leftward and push the compacting slider 143 (also referred to as a punch). The compacting slider 143 is disposed in the cavity 111, and after being pushed by the second slider 142, converts the lateral force of the second slider 142 into the longitudinal force of the compacting slider 143, and the compacting force The longitudinal force of the slider 143 pressurizes the magnetic powder 150. For example, when the magnetic powder 150 is pressed, the moving direction of the compacting slider 143 can be downward, and the magnetic powder 150 is pressurized, as shown in FIG.

As shown in FIGS. 3 and 4, an electromagnetic transmission compacting device 200 according to a second embodiment of the present invention is shown. The electromagnetic drive compaction device 200 of the second embodiment is generally similar to the electromagnetic drive compaction device 100 of the first embodiment, like elements being numbered similarly. The electromagnetic transmission compacting device 200 of the second embodiment differs from the electromagnetic transmission compacting device 100 of the first embodiment in the transmission mechanism 240 of the electromagnetic transmission compacting device 200.

The transmission mechanism 240 includes a lever 242, a slider 241 and a compacting slider 243, which can convert the lateral force of the magnetic conductive block 230 into the longitudinal force of the compacting slider 243, and the slider 241 is disposed on the magnetic conductive block 230. Outside (the invention The second embodiment is the right side) for converting the lateral force of the magnetic conductive block 230 into the longitudinal force of the slider 241.

For example, when the magnetic powder 250 is pressed, the direction of movement of the slider 241 may be upward and push the right arm 242' of the lever 242. The lever 242 is disposed above the slider 241 and the compacting slider 243, and the right arm 242' of the lever 242 is disposed at the moving direction of the slider 241. When the right arm 242' of the lever 242 is pushed by the longitudinal force of the slider 241, the left arm 242" of the lever 242 is rotated downward by the intermediate fulcrum and pushes the compacting slider 243. The compacting slider 243 After being pushed by the left arm 242" of the lever 242, the compacting slider 243 moves downward and pressurizes the magnetic powder 250 as shown in FIG.

As shown in FIGS. 5 and 6, an electromagnetic transmission compacting device 300 according to a third embodiment of the present invention is shown. The electromagnetic drive compaction device 300 of the third embodiment is generally similar to the electromagnetic drive compaction device 100 of the first embodiment, like elements being numbered similarly. The electromagnetic transmission compacting device 300 of the third embodiment is different from the electromagnetic transmission compacting device 100 of the first embodiment in that the electromagnetic transmission compacting device 300 presses the compacting slider only by the magnetic conductive block to pressurize the magnetic powder. .

The magnetic conductive block 330 is disposed in the coil 321 . When the pulse electrical signal flows through the coil 321 , a mutual repulsive force is generated between the coil 321 and the magnetic conductive block 330 , and a lateral direction is generated between the magnetic conductive block 330 . The force is applied to pressurize the magnetic powder 350 by moving the magnetic block 330. However, the material used to pressurize the magnetic powder 350 is usually a high hardness material, so the magnetic powder 350 is again pressurized using a compacting slider 340. The above-described compacting slider 340 does not limit the embodiment of the present invention.

The compacting slider 340 is disposed inside the magnetic conductive block 330 such that the magnetic conductive block 330 is interposed between the compacting slider 340 and the coil 321 . The lateral force of the magnetically permeable block 330 can be used to push the compacting slider 340 such that the compacting slider 340 pressurizes the magnetic powder 350 in the cavity 311. For example, when the magnetic powder 350 is pressed, the moving direction of the magnetic conductive block 330 may be moved to the left and the compacting slider 340 is pushed. After the compacting slider 340 is pushed by the magnetic conductive block 330, the compacting slider 340 also moves to the left and pressurizes the magnetic powder 350 as shown in FIG.

As shown in Figs. 7 and 8, an electromagnetic transmission compacting device 400 according to a fourth embodiment of the present invention is shown. The electromagnetic drive compaction device 400 of the fourth embodiment is generally similar to the electromagnetic drive compaction device 300 of the third embodiment, like elements being numbered similarly. The electromagnetic transmission compacting device 400 of the fourth embodiment is different from the electromagnetic transmission compacting device 400 of the third embodiment in that the electromagnetic transmission compacting device 400 pressurizes the magnetic powder by using two sets of magnetic conductive blocks and two sets of compacting sliders. .

The first magnetic conductive block 431 is disposed in the coil 421, and the second magnetic conductive block 432 is also disposed in the coil 421 opposite to the first magnetic conductive block 431. When the pulse electrical signal flows through the coil 421, a mutual repulsive force is generated between the coil 421 and the first magnetic conductive block 431, and a lateral force is generated on the first magnetic conductive block 431. The coil 421 also generates a mutual repulsive force with the second magnetic conductive block 432, and generates a lateral force to the second magnetic conductive block 432.

The first compacting slider 441 is disposed on the inner side of the first magnetic conductive block 441, so that the first magnetic conductive block 431 is interposed between the first compacting slider 441 and the line. Between the rings 421. The second compacting slider 442 is disposed inside the second magnetic conductive block 432 such that the second magnetic conductive block 432 is interposed between the second compacting slider 442 and the coil 421 .

The lateral force of the first magnetic block 431 is used to push the first compacting slider 441 to move the first compacting slider 441 in the direction of the second compacting slider 442. Similarly, the lateral force of the second magnetic block 432 is used to push the second compacting slider 442 and also move the second compacting slider 442 in the direction of the first compacting slider 441. The magnetic powder 450 can be press-formed by the movement of the first compacting slider 441 and the second compacting slider 442. For example, when the magnetic powder 450 is pressed, the moving direction of the first magnetic conductive block 431 may be moved to the left, and the first compacting slider 441 is pushed, and the moving direction of the second magnetic conductive block 432 may be moved to the right. And pushing the second compacting slider 442. After the first compacting slider 441 and the second compacting slider 442 are pushed, they simultaneously move toward the center of the cavity 411 and pressurize the magnetic powder 450 as shown in FIG.

As shown in FIG. 9, the method for manufacturing a magnet using the electromagnetic transmission compacting device of the present invention comprises providing a pulse electrical signal, a magnetic powder alignment step and a magnetic powder pressing step, as follows:

As shown in FIG. 1, in the present embodiment, before the electromagnetic transmission compacting device 100 is used, the magnetic material is first pulverized to form the magnetic powder 150, and the magnetic powder 150 is poured into the cavity 111.

Step S100: providing a pulse electrical signal. A pulse of electrical signals (e.g., pulse current) is passed through the coil 121 to create a strong magnetic field in the cavity 111.

Step S200: a magnetic powder alignment step. While the strong magnetic field is generated in the cavity 111, the magnetic powder 150 in the cavity 111 is aligned.

Step S300: a magnetic powder pressurization step. While the strong magnetic field is generated, the coil 121 causes the eddy current to be generated by the magnetic conductive block 130, so that a mutual repulsive force is generated between the coil 121 and the magnetic conductive block 130, and a lateral force is generated to the magnetic conductive block 130. The lateral force of the magnetic block 130 pushes the first slider 141, so that the first slider 141 has an upward force and pushes the second slider 142. The second slider 142 is a laterally moving object, and the second slider After the first slider 141 is pushed by the first slider 141, the second slider 142 pushes the compacting slider 143, and the compacting slider 143 is a longitudinally moving object. After the compacting slider 143 is pushed by the second slider 142, The magnetic powder 150 in the cavity 111 is press-formed by the longitudinal force of the compacting slider 143 as shown in FIG.

Another embodiment is that, as shown in FIG. 3 and FIG. 4, the difference from the above is the magnetic powder pressing step (step S300): the transmission mechanism 240 simultaneously uses the slider 241 and the lever 242 to laterally exert force on the magnetic conductive block 230. It becomes the longitudinal force of the compacting slider 243. The magnetic conductive block 230 generates a lateral force on a transmission mechanism 240. The lateral force of the magnetic conductive block 230 pushes the slider 241, so that the slider 241 has an upward force, and the right arm 242' of the lever 242 is upward. Applying force, with the middle fulcrum, the left arm 242" of the lever 242 is downward, and presses the compacting slider 243, so that the compacting slider 243 pressurizes the magnetic powder in the cavity, as shown in FIG. Show.

In still another embodiment, as shown in FIG. 5 and FIG. 6, the difference from the above is the magnetic powder pressing step (step S300): while the strong magnetic field is generated, the coil 321 and a magnetic conductive block 330 are generated. a mutual repulsive force, and a lateral force (such as a leftward force) is generated on the magnetic conductive block 330, and the lateral force of the magnetic conductive block 330 is converted into the function of the compacting slider 340. The force moves the compact slider 340 to the left and press-forms the magnetic powder 350. Therefore, the direction in which the magnetic powders 350 are aligned is perpendicular to the moving direction of the compacting slider 340, as shown in FIG.

In another embodiment, as shown in FIG. 7 and FIG. 8 , the difference from the above is the magnetic powder pressing step (step S300 ): the moving direction of the first magnetic conductive block 431 can be leftward and push the first pressure. The solid slider 441 can move in the right direction and push the second compact slider 442. After the first compacting slider 441 and the second compacting slider 442 are pushed, they simultaneously move toward the center of the cavity 411 and pressurize the magnetic powder 450 as shown in FIG.

The magnet manufacturing method of the present invention is completed by compacting the magnetic powder alignment and the magnetic powder at the same time, so that the magnet can be quickly pressed.

When a pulse of electrical signal flows through the coil, a strong magnetic field is generated in the cavity, and the magnetic powder in the cavity is aligned, and at the same time, the magnetic conductive block outside the coil, due to the principle of electromagnetic induction, the magnetic conductive block is simultaneously generated. An eddy current, because the current direction of the eddy current is opposite to the current direction on the coil, so that a mutual repulsive force is generated between the coil and the magnetic conductive block, that is, the compacting mold generates a lateral force on the magnetic conductive block, and then reuses The transmission mechanism converts the lateral force of the magnetic conductive block into a force of the compacting slider, and then pressurizes the magnetic powder in the cavity by the force of the compacting slider, so the invention only needs the pulse electrical signal When the energy flows through the coil, the alignment and compaction of the magnetic powder can be completed.

The transmission mechanism uses a slider or a lever to change the direction of force transmission, so the mechanical composition is relatively simple.

In the first embodiment and the second embodiment, the direction of magnetic powder compaction and the magnetic powder The direction of the alignment is parallel. In the third embodiment and the fourth embodiment, the direction in which the magnetic powders are aligned is perpendicular to the moving direction of the compacting slider, so that the shape of the magnet can be changed more.

Compared with the prior art, the electromagnetic transmission compacting device and method of the present invention only need to provide a single energy source to the pulse electrical signal on the coil, so that the magnetic powder alignment and the magnetic powder pressing step can be simultaneously performed, so that the magnet can be quickly pressed, thereby saving Energy and reduce process costs. Furthermore, the electromagnetic transmission compacting device of the present invention has a simple mechanical structure, and does not require a separate step of magnetic powder pressurization by a magnetic powder pressing device of a complicated mechanical structure.

In the above, it is merely described that the present invention is an embodiment or an embodiment of the technical means for solving the problem, and is not intended to limit the scope of implementation of the present invention. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

100‧‧‧Electromagnetic drive compaction device

110‧‧‧Compacting mould

111‧‧‧ cavity

120‧‧‧Magnetic field generating unit

121‧‧‧ coil

130‧‧‧Magnetic block

140‧‧‧Transmission mechanism

141‧‧‧First slider

142‧‧‧second slider

143‧‧‧Compact slider

150‧‧‧Magnetic powder

200‧‧‧Electromagnetic drive compaction device

211‧‧‧ cavity

230‧‧‧magnetic block

240‧‧‧Transmission mechanism

241‧‧‧ Slider

242‧‧‧Leverage

242’‧‧‧right arm

242"‧‧‧ Left arm

243‧‧‧Compact slider

250‧‧‧Magnetic powder

300‧‧‧Electromagnetic drive compaction device

311‧‧‧ cavity

321‧‧‧ coil

330‧‧‧Magnetic block

340‧‧‧Compact slider

350‧‧‧Magnetic powder

400‧‧‧Electromagnetic drive compaction device

411‧‧‧ cavity

421‧‧‧ coil

431‧‧‧First magnetic block

432‧‧‧Second magnetic block

441‧‧‧First compaction slider

442‧‧‧Second compaction slider

450‧‧‧Magnetic powder

S100~S200‧‧‧Steps

1 is a schematic cross-sectional view of an electromagnetic drive compacting device according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view of the electromagnetic drive compacting device according to a first embodiment of the present invention; FIG. FIG. 4 is a schematic cross-sectional view of the electromagnetic drive compacting device according to the second embodiment of the present invention; FIG. 5 is a schematic cross-sectional view of the electromagnetic drive compacting device according to the third embodiment of the present invention; Figure 6 is a cross-sectional view showing the electromagnetic drive compacting device of the third embodiment of the present invention; Figure 7 is a cross-sectional view of the electromagnetic drive compacting device according to the fourth embodiment of the present invention; A schematic cross-sectional view of an electromagnetic drive compacting device after actuation; and FIG. 9 is a flow chart of a method for manufacturing a magnet according to the present invention.

100‧‧‧Electromagnetic drive compaction device

110‧‧‧Compacting mould

111‧‧‧ cavity

120‧‧‧Magnetic field generating unit

121‧‧‧ coil

130‧‧‧Magnetic block

140‧‧‧Transmission mechanism

141‧‧‧First slider

142‧‧‧second slider

143‧‧‧Compact slider

150‧‧‧Magnetic powder

Claims (10)

An electromagnetic transmission compacting device comprising: a compacting die comprising a cavity for filling a magnetic powder; a magnetic field generating unit comprising a coil, the coil surrounding the cavity, wherein When a pulsed electrical signal flows through the coil, a strong magnetic field is generated in the cavity, and the magnetic powder in the cavity is aligned; a magnetic conductive block is disposed outside the coil, wherein When the pulse electrical signal flows through the coil, a mutual repulsive force is generated between the coil and the magnetic conductive block, and a lateral force is generated on the magnetic conductive block; and a transmission mechanism includes a compacting slider, wherein the The transmission mechanism is configured to convert the lateral force of the magnetic conductive block into a longitudinal force of the compacting slider, and the longitudinal force of the compacting slider pressurizes the magnetic powder. The electromagnetic transmission compacting device of claim 1, wherein the transmission mechanism further comprises: a first slider disposed on an outer side of the magnetic conductive block for the lateral force of the magnetic conductive block; Converting into a longitudinal force of the first slider; and a second slider disposed at a moving direction of the first slider to change the longitudinal force of the first slider to the first a lateral force of the two sliders, wherein the lateral force of the second slider pushes the compacting slider. The electromagnetic drive compacting device according to claim 1, wherein The transmission mechanism further includes: a slider disposed on an outer side of the magnetic block for converting the lateral force of the magnetic block into a longitudinal force of the slider; and a lever including a left force An arm and a right arm, wherein the left arm pushes the compacting slider when the right arm is pushed by the longitudinal force of the slider. An electromagnetic transmission compacting device comprising: a compacting die comprising a cavity for filling a magnetic powder; a magnetic field generating unit comprising a coil, the coil surrounding the cavity, wherein When a pulsed electrical signal flows through the coil, a strong magnetic field is generated in the cavity, and the magnetic powder in the cavity is aligned; and a first magnetic block is disposed in the coil, wherein When the pulse electrical signal flows through the coil, a mutual repulsive force is generated between the coil and the first magnetically conductive block, and a lateral force is generated on the first magnetically conductive block to move the first magnetically conductive block to Magnetic powder is formed by pressure. The electromagnetic drive compacting device of claim 4, further comprising: a first compacting slider disposed on an inner side of the first magnetically conductive block, such that the first magnetically conductive block is interposed in the first pressure Between the real slider and the coil; wherein the lateral force of the first magnetic block is used to move the first compacting slider, so that the first compacting slider pressurizes the magnetic powder. The electromagnetic drive compacting device according to claim 4, further comprising: a second magnetically conductive block disposed in the coil and opposite to the first magnetically conductive block, wherein when the pulsed electrical signal flows through the coil, a mutual repulsive force is generated between the coil and the second magnetically conductive block, And a lateral force is generated on the second magnetic conductive block to push the second magnetic conductive block to press-form the magnetic powder. The electromagnetic transmission compacting device according to claim 6, further comprising: a second compacting slider disposed on the inner side of the second magnetic conductive block, wherein the second magnetic conductive block is interposed in the second pressure Between the real slider and the coil; wherein the lateral force of the second magnetic block is used to push the second compacting slider to the direction of the first compacting slider Move and press-form the magnetic powder. A method for manufacturing a magnet comprises the steps of: pouring a magnetic powder into a cavity; using the pulse electrical signal to flow through a coil to generate a strong magnetic field in the cavity, and the magnetic powder in the cavity Generating an alignment arrangement; and generating a strong magnetic field to cause a mutual repulsive force between the coil and a magnetic conductive block, and generating a lateral force on the magnetic conductive block, and causing the lateral force of the magnetic conductive block Turning into a force of a compacting slider to pressurize the magnetic powder. The method for manufacturing a magnet according to claim 8, wherein the magnetic powder is aligned in a direction parallel to a moving direction of the compacting slider. The method for manufacturing a magnet according to claim 8, wherein the direction in which the magnetic powder is aligned is perpendicular to a moving direction of the compacting slider.