JPH02263414A - Magnetic field molding rotary press device - Google Patents

Abstract

PURPOSE:To make the equalization of cycle time and the molding of polarity anisotropic electromagnets feasible by a method wherein a power supply side contact is reciprocated between a position in contact with a magnet side contact and another position not in contact with the same synchronized with the shifting and stoppage of the electromagnets having a pair or more poles arranged as if holding a dice. CONSTITUTION:A multitude of electromagnets 7 are arranged at equi-angle intervals as if encircling a through hole 13 of a dice 2 so that the magnetic poles formed on the ends of these yokes may be excited alternately in S, N directions along the circumferential direction of the through hole 13. Then, the electromagnets 7 are connected to a contact 14 provided on the peripheral surfaces of the dice 2 while the magnet side contact 9 is connected to a contact 15 provided on the peripheral surface of the through hole 13. On the other hand, an insulating plate 16 fitted with a power supply side contact 8 is fixed to a driving mechanism 18 through the intermediary of a shock absorber mechanism 17. Accordingly, when the dice 2 is stopped on work station, if the power supply side contact 8 advances to come into contact with the magnet side contact 9, the electromagnets 7 are connected to a power supply 10 so as to be excited for generating a magnetic field in the dice 2. Through these procedures, the cycle time can be equalized, thereby enabling the polarity anisotropic electromagnets 7 to be molded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a rotary press device for press-molding a molded body in a die installed on a turntable, and more specifically, it relates to a rotary press device for press-molding a molded body in a die installed on a turntable. This invention relates to a magnetic field molding rotary press device for manufacturing magnets.

[Prior Art] As a means of improving the magnetic properties of a permanent electromagnet, a mold is filled with ferromagnetic material powder, and a magnetic field is created in the mold to change the axis of easy magnetization of the ferromagnetic material powder. A method has been implemented in which the ferromagnetic material powder is oriented in the direction of the magnetic field, and in this state, the ferromagnetic material powder is pressed and molded.

A magnetic field molding rotary press as shown in FIG. 5 has conventionally been used as a device for carrying out such magnetic field molding work continuously and efficiently. The outline of this magnetic field molding rotary press will be explained below. It has advancement holes that open at the top and bottom at fixed angles on a concentric circle close to the circumference of a disc-shaped turntable 1 installed horizontally so as to rotate intermittently. Mouth-shaped dice 2.2... are provided. Rotary frames 11.11 that rotate in synchronization with the turntable 1 are arranged above and below the turntable 1, and press mechanisms 3.5 mainly composed of hydraulic cylinders are fixed to these, respectively. The press mechanisms 3.5 are arranged to face each other so as to sandwich the die 2 above and below, and an upper die and a lower die are formed at the tip of the plunger 4.6, and these are inserted through the die 2. It is inserted into the hole through the upper and lower openings. A pair of electromagnets 7.7 for forming a magnetic field are fixedly arranged at a specific work station where the die 2 is stopped so as to sandwich the stopped die 2 from above and below, and these electromagnets 7.7 are connected to the press. There is a through hole through which the plunger 4.6 of the mechanism 3.5 is pushed. Furthermore, a feeder 12 is arranged beside the turntable 1 to appropriately supply ferromagnetic material powder into the die 2.

The procedure for magnetic field molding of a ferromagnetic material using this conventional magnetic field molding rotary press device is as follows.

As shown in FIG. 5, when the turntable 1 and the rotating frame 11.11 stop, the plunger 6 of the lower press mechanism 5 rises, and its tip penetrates the electromagnet 7 and touches the bottom of the die 2. It is inserted shallowly enough to block it. Then,
A predetermined poisonous ferromagnetic material powder is supplied from the feeder 12 into the die 2, and the feeder I2 is moved back.

Next, the plunger of the upper press mechanism 3 is lowered, and its tip is inserted into the plunger 2 through the electromagnet 7. Here, a direct current is passed through the electromagnet 7.7, and a magnetic field is formed in the through hole of the die 2. Then, the axes of easy magnetization of the ferromagnetic material powder in the die 2 are oriented simultaneously in the direction of the magnetic field, that is, vertically in FIG. 5.

In this state, the plunger 4 of the press mechanism 3 further above descends, compressing and molding the ferromagnetic material powder in the die 2. Thereafter, a direct current in the opposite direction to the above is passed through the electromagnet 7.7, and the molded body is demagnetized.

Thereafter, the plunger 6 of the lower press mechanism 5 rises, and the molded body is ejected to the top surface of the turntable 1, and is taken out from the turntable 1 by a discharge mechanism (not shown).

[Problems to be Solved by the Invention] The above molding process is distributed to a plurality of work stages and performed sequentially, but it is ideal that the cycle time at each work stage is equal. However, in the conventional magnetic field forming press described above, the electromagnet 7.7 that forms a magnetic field in the die 2 does not rotate together with the turntable 1, but is fixed at the - position. This is electromagnet 7.
The reason for this is that the turntable 7 cannot be moved together with the turntable 1 due to the connection with the power supply device, which supplies large current power to the turntable 7.

As a result, the steps of applying a magnetic field to the ferromagnetic material powder supplied into the die 2, shaping it, and demagnetizing it must be performed at one workstation where the electromagnet 7.7 is arranged. That is, the main steps of all the magnetic field forming steps are concentrated at the workstation where the electromagnet 7.7 is installed. Therefore, the cycle time there is necessarily extreme compared to the cycle time of other worksites. It's getting long. For this reason, 1
The time required to mold one molded object is regulated by the cycle time of the work station 2-cylinder, which prevents production efficiency from increasing.Also, the merits of the rotary press's inherent advantages of the number of process steps and simultaneous parallel execution is not obtained.

Furthermore, the conventional magnetic field rotary press device shown in FIG. 5, as shown in FIG. It is oriented. However, as shown in Figure 6, when molding a so-called polar anisotropic electromagnet in which the axis of easy magnetization is oriented radially with respect to these central axes, the multiple magnetic poles of the electromagnet are alternately arranged around the die. must be placed at fixed angles. For this reason, in the above-mentioned rotary press device in which the die is set on a turntable and rotates together with the turntable,
Unable to connect electromagnet to power supply. For this reason, when molding the polar anisotropic electromagnet, it is necessary to use a press device with a fixed die, making it difficult to obtain high productivity.

This invention solves the above-mentioned problems with the conventional magnetic field forming press, makes it possible to level out the cycle time by distributing the processes of each workpiece, and also makes it possible to form polar anisotropic electromagnets. The purpose of the present invention is to provide a magnetic field rotary press device.

Means for Solving the Problem] In other words, the gist of the means adopted in the present invention to achieve the above object is to use a plurality of dice 2 with vertical openings.
A turntable 1 that can rotate intermittently and has plungers 4.6 arranged above and below the stop positions of the dies 2.2, and inserted into the dies 2.2 from above and below, respectively.
upper and lower press mechanisms 3.5 having
In a magnetic field forming rotary press device comprising an electromagnet 7 having one or more pairs of magnetic poles arranged to sandwich...
The electromagnet 7 consists of a movable electromagnet that moves together with the turntable 1, a magnet-side contact 9 that is connected to the electromagnet 7 and moves together with the electromagnet 7.8, and a power supply 10 that is installed at the stop position of the electromagnet 7. In addition to being connected to
The power source fi+ reciprocates in synchronization with the movement and stop of the electromagnet 7 between a position away from and a position in contact with the contact 9! This is a magnetic field forming rotary press device characterized by having an I contact point 8.

[Function] The above magnetic field rotary press device of the present invention? 1, the electromagnet 7.7 moves together with the turntable 1, so that the process of forming the magnetic field in the die 2.2 can be performed not only at one workstation (but can also be distributed arbitrarily to multiple workstations). Then, the above electromagnet 7.8
When the electromagnet 7.7 stops at the 7th station, the power supply side contact 8 comes into contact with the magnet side contact 9 that moves together with the electromagnet 7.7.
is connected to the power supply 10. As a result, a current flows through the electromagnet 7.7 to excite it, and a magnetic field is applied to the dice 2.2 stopped on the workpiece.

Furthermore, since the electromagnet 7.7 moves together with the workstation 1, it is also possible to arrange its magnetic poles so as to surround the dice installed at the workstation 1.

[Embodiments] Next, embodiments of the present invention will be specifically described with reference to the drawings.

1 to 3 show examples in which the present invention is applied to the molding of a polar anisotropic electromagnet as shown in FIG. Here, according to Figure 5, is it already? The same parts as those of the conventional magnetic field rotary press apparatus described above are designated by the same reference numerals.

Here, the electromagnets 7.7... are not arranged in pairs above and below the dies 2.2... as in the conventional magnetic field rotary press equipment described above, but as shown in FIGS. 2 and 3,
A plurality of electromagnets 7 .
N magnets are alternately excited.

These electromagnets 7.7... are connected to magnet-side contacts 9.9 provided on the circumferential surface of the turntable 1 at positions corresponding to the respective dice 2.

In the illustrated embodiment, as shown in FIG. 2 and FIG. The contact point 14 provided on the circumferential surface of the die 2
．． 14 is connected to the electromagnet 7, and the magnet a1 contact 9 is connected to the contact 15.15 provided on the circumferential surface of the ordinary hole 13, and when the die 2 is fitted into the ordinary hole 13, the contact 14 and 15 makes contact, the electromagnet 7 is connected to the magnet side contact 9.

On the other hand, place the dice 2.2 toward the circumference of the turntable l.
The work stage, where... stops! A power supply side contact 8.8 corresponding to the magnet side contact 9.9 is provided on the main body.

This power supply side contact 8.8 is attached to an insulating plate 16, and this insulating plate 16 is attached to a drive mechanism 18 such as an air cylinder via a shock absorbing mechanism 17 to drive the drive mechanism 18. As a result, it is caused to reciprocate back and forth toward the circumferential surface of the turntable 1. This power supply side contact 8.8 is connected to the power supply 10. As a result, when the die 2 stops at the workstation, the power supply side contact 8.8 moves forward and contacts the magnet side contact 9.9, thereby connecting the electromagnets 7.7 to the power supply 10 and energizing them. , a magnetic field is generated in the dice 2.2....

In the embodiment shown in FIG. 1, rotary frames 11.11 are arranged above and below the turntable l, and two press mechanisms 3.5 are attached to each of these. The press mechanisms 3.5 facing each other vertically are arranged to face each other so as to sandwich the die 2 therebetween, and their plungers 4.6 are inserted into the die 2 from above and below, respectively.

In this magnetic field rotary press, the standard process when there are four work stations is as follows. In addition, since there are four work stations, the turntable rotates intermittently at 90'' intervals in the direction of the arrow, and the dies 2, 2... move each work station sequentially,
shall be stopped.

With the turntable 1 stopped at the position shown in Fig. 1, first, on the workpiece cylinder at the back right in Fig. 1,
The plunger 6 of the lower press mechanism 5 (not shown) rises, and its tip is shallowly inserted into the bottom of the die 2 so as to close it. Thereafter, the feeder 12 is driven to feed the ferromagnetic material powder into the die 2, and then the feeder 12 is retreated.

At the next work station, the work station on the right front in FIG. 1, the drive mechanism 18 operates to
The insulating plate 16 is advanced and its power source contact 8.8 comes into contact with the magnet side contact 9.9 attached to the circumferential surface of the turntable l. This connects the electromagnets 7, 7, . . . to the power source 10. As a result, the electromagnets 7.7 arranged around the through hole of the die 2 are excited, and the magnetic poles formed at the tips of these yokes are alternately magnetized by 81 N, and the inside of the die 2.2... A magnetic field is formed. Subsequently, the plunger 4 of the upper press mechanism 3 descends, compressing and molding the ferromagnetic material powder in the die 2 in the magnetic field. Thereafter, the operation of the drive mechanism 18 causes the power supply side contacts 8.
8 separates from the magnet side contact 9.9.

Incidentally, when the power supply side contact 8.8 and the magnet side contact 9.9 come into contact, the shock is buffered by the buffer mechanism 16.

At the workstation on the left front in FIG. 1, which is the next workstation, the power supply side contact 8 is operated by the drive mechanism I8, similarly to the workstation described above.
．． 8 is in contact with the magnet side contact 9.9, and the electromagnets 7, 7... are energized, but here, a current is passed in the opposite direction to that in the work station on the right side in FIG. 1 above.

As a result, a magnetic field in the direction opposite to that in the previous step is formed in the die 2, and the molded body in the die 2 is demagnetized. Thereafter, the operation of the drive mechanism 18 causes the power supply side contacts 8.
8 separates from the magnet side contact 9.9.

At the next workstation, the workstation on the far left in Figure 1, the plunger of the upper press mechanism (not shown) rises, and the plunger of the lower press mechanism (also not shown) rises to release the molded object. Push it up to the top of die 2. Then, the molded body is taken out from the magnetic field molding rotary press by a discharge mechanism (not shown).

In each workstation, these operations proceed simultaneously, and when each of them is completed, the turntable I and the rotating frame 11.11 simultaneously rotate 90'', and the same operation is repeated at each workstation. Thus, one cycle One piece of ferromagnetic powder material is molded at each workstation.However, the distribution of processes to each workstation is just an example, and in reality, the cycle time of the process at each workstation It will be distributed as appropriate so that it is evenly distributed.

Therefore, it goes without saying that when the number of workpieces is changed, the distribution of processes also changes.

The embodiment shown in Fig. 4 is a magnet in which the axis of easy magnetization of the magnetic particles is oriented in the central axis direction of the cylindrical magnet as shown in Fig. 7, similar to the magnetic field forming rotary press shown in Fig. 5. The present invention is applied to a magnetic field molding rotary press for molding.

In this embodiment, electromagnets 7. placed above and below the die.
7 to the rotating frame ILII, press mechanism 3.
I try to rotate it together with 5. Then, the magnet side contacts 9.9 are attached to the shield case of each electromagnet 7.7 in an insulated state, and the drive mechanism 1 is attached to each workstation.
8 connects and separates from the magnet side contacts 9 and 9, and the power source 1
A power supply side contact 8.8 connected to 0 is arranged.

The pressing operation with this device is generally similar to the embodiment shown in FIGS. 1 to 3 above.

[Effects of the Invention] As explained above, according to the magnetic field forming rotary press of the present invention, the process of placing dies in a magnetic field can be distributed over multiple workpieces instead of being concentrated in one workpiece. , processes can be arbitrarily distributed so that the cycle time of each workstation is equalized. In addition, since it becomes possible to arrange magnets so as to surround a die placed on a rotating turntable, it is now possible to mold so-called polar anisotropic magnets, which was previously impossible, using the rotary press method. become.

Therefore, an excellent effect can be obtained in that the productivity of magnetic field molding can be improved.

[Brief explanation of drawings]

Fig. 1 is a half-sectional perspective view showing only the main parts of a magnetic field forming rotary press showing an embodiment of the present invention, and Fig. 2 is a diagram of the same magnetic field forming rotary press showing another embodiment of the magnetic field forming rotary press. FIG. 5 is a half-section perspective view showing only the main parts of the press; FIG. 5 is a half-section perspective view showing only the main parts of a conventional magnetic field forming rotary press; FIGS. 6 and 7 are examples of molded magnets. FIG. l... Turntable 2... Dice 3.5... Press mechanism 4.6... Plunger of press mechanism 7... Electromagnet 8... Power supply side contact 9... Magnet side contact lO... Power supply lO... Power supply

Claims (1)

[Claims] A turntable 1 that can be rotated intermittently and has a plurality of dice 2, 2, etc. that open upward and downward, and is arranged above and below the stopping position of the dice 2, 2, and is inserted into the dice 2, 2, and so on from above and below, respectively. In a magnetic field forming rotary press device comprising upper and lower press mechanisms 3, 5 having plungers 4, 6, and an electromagnet 7 having one or more pairs of magnetic poles arranged to sandwich the dies 2, 2..., the electromagnet 7 turns It consists of a movable electromagnet that moves together with the table 1, and a magnet side contact 9 that is connected to this electromagnet 7 and moves together with the electromagnets 7 and 8, and is installed at the stop position of the electromagnet 7,
A magnetic field forming rotary having a power supply side contact 8 connected to a power supply 10 and reciprocating between a position away from the contact 9 and a position in contact with the contact 9 in synchronization with the movement and stop of the electromagnet 7. Press equipment.