JP3421383B2 - Magnetic polishing machine for mass production - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a small size such as rings, ring frames, pendants, jewels such as broaches, precision machine parts such as screws, shafts, clock hands, integrated circuit parts, etc. The present invention relates to a mass-production magnetic polishing machine capable of efficiently mass-polishing an article that cannot allow a slight change in shape during polishing while maintaining the original shape accurately in every detail.

[0002]

2. Description of the Related Art In the Japanese Patent Publication No. 4-26981, the present applicant rotates a magnetic disk having strong S-pole zones and N-pole zones alternately at high speed, and a non-magnetic container can be detachably mounted on the magnet disk. Disclosed is a magnetic polishing machine in which a material to be polished, a large number of polishing pieces, and a plurality of permanent magnet pieces optionally covered with a non-magnetic material are charged into a container. In this method, a polishing piece made of a magnetic material violently rotates under the influence of a magnetic field that is violently converted and collides with the material to be polished. At this time, since the materials to be polished are not affected by magnetism, they do not collide with each other, only the polishing pieces collide with each other, and the delicate shape of the material to be polished is not changed. It can be polished at high speed. According to the above magnetic polishing machine, parts of various industrial products such as jewelry can be polished without being hardened or deformed by hitting metal, as in barrel polishing.

[0003]

However, in the above technique, a polishing container is detachably loaded on the magnetic disk while keeping a space required for safety, and an object to be polished is loaded in the container. Since it is inserted and polished, the portion to be polished is limited to the range of the magnetic influence of the magnet disk.
Therefore, even if a large polishing container is used, or the polishing container is deepened and a large amount of an object to be polished is loaded, the polishing cannot be performed efficiently. That is, the range of the polishing force is limited by the size of the magnet disk, the strength of the magnetic force of the embedded magnet, and the number. Therefore, if large-scale polishing is intended, the diameter of the magnet disk may be increased, but the extreme increase in diameter leads to an extreme increase in peripheral velocity at the peripheral edge of the disk, which is important for safety and stable operation. There was a limit.

Further, in order to improve the polishing efficiency, it is tentatively achieved by increasing the rotation speed of the magnet disk, but in actual practice, the upper limit is reached at about 3000 rpm, and even if the rotation speed is further increased, the polishing small pieces are increased. I couldn't expect a more vigorous move. Therefore, make the movement of the polishing piece more vigorous by a method other than increasing the rotation speed,
Moreover, there has been a demand for a method of efficiently polishing a large number of objects to be polished all at once without making the circumference of the magnet disk extremely large.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and its constitution is a belt conveyor or turntable driven by a pair of pulleys.
While suspending or placing multiple polishing containers so that they can be freely attached and detached and do not shift in position, the surface of the disk made of non-magnetic material is divided into a nodular S-pole zone and an N-pole zone alternately along the circumference. , The S pole zone has a permanent magnet with the S pole at the top,
A permanent magnet was embedded in the N-pole zone with the upper surface being the N-pole.
The above-mentioned belt conveyor is equipped with a plurality of magnet disks that can rotate at high speed.
Alternatively , they are placed close to each other on the bottom of the turntable ,
The polishing vessel suspended or placed on the belt conveyor or turntable, polishing container bottom is arranged to Rutotomoni at a distance that does not contact the magnet disc on the disc rows, and the object to be polished in the polishing vessel, many It is characterized in that the magnetic small pieces for polishing are loaded.

In the magnetic polishing machine for mass production according to the present invention, a plurality of magnet disks may be rotated by separate motors. However, a plurality of magnet disks may be arranged and the torque generated by the motors may be used as it is or by decelerating one magnet. It is transmitted to a gear coaxial with the disk,
It is preferable to transmit this rotational force to a gear that is coaxial with the adjacent magnet disk to rotate the magnet disks alternately in opposite directions. A belt conveyor or a turntable is arranged on this magnet disk array, and the motor for rotating the magnet disk or another motor is extremely decelerated to slowly rotate the belt conveyor or turntable. On this belt conveyor, a container accommodating an object to be polished is removably suspended or placed. Alternatively, the polishing container is placed on the turntable. The magnet disk is made of a non-magnetic material such as aluminum or plastics, and it is preferable that a strong rod-shaped permanent magnet is embedded in this material.

[0007] It is preferable that the magnetic disk is divided into one or more straight lines passing through the center point on the surface, and the even-numbered fractions thus obtained are alternately set as the S pole zone and the N pole zone. The S-pole zones and the N-pole zones are alternately arranged along the circumference. By arranging a plurality of permanent magnets, preferably rod-shaped permanent magnets with the S pole on top, and arranging a plurality of permanent magnets with the N pole on top in the S pole zone, And north pole zones are obtained. It is preferable that the S-pole zone and the N-pole zone have magnetic force not only in the circumference but also in the vicinity of the center portion, so that fan-shaped magnetic pole zones of 2 pairs, 3 pairs, etc. are obtained.
If there are two pairs of the S-pole zone and the N-pole zone, that is, two pairs each, one rotation of the magnet disk causes the magnetic field to be converted S → N → S → N four times, whereby polishing is efficiently performed.

The number of times the magnetic field is converted is 200 to 10,000 times / minute, preferably 500 to 5000 times / minute. Generally, the more the number of conversions increases, the faster the finish.However, even if only the number of conversions is increased, the size and shape of the polishing piece or the shape and size of the stirring permanent magnet, the relationship between the material to be polished and the container, etc. Relatedly, it cannot always be preferably polished.

A vertical belt conveyor driven by a pair of pulleys slowly rotating at a speed different from that of the magnet disk is provided on the magnet disk. Engagement means for suspending or mounting the lidded container is provided on the outer surface of the belt conveyor. The engaging means is not particularly limited, but a dovetail groove may be provided on the outer periphery of the belt conveyor, and a ridge that engages with the dovetail groove may be provided on the lidded container. Alternatively, the bottom plate may be intermittently extended from the lowermost end of the belt conveyor, and the container may be placed on the bottom plate. Alternatively, a plurality of shallow containers without a lid may be intermittently fixed to the lowermost end of the belt conveyor, and a polishing container with a lid may be housed in this container for polishing.
In any case, the lidded container for polishing is slowly moved by a belt conveyor while keeping a slight gap on a magnet disk rotating at high speed.

An endless belt is stretched horizontally and rotated extremely slowly by a pair of pulleys, a container with a lid for polishing is placed on the upper belt, and a slight gap is kept on the lower surface of the belt. It is also possible to rotate the rows of magnet disks at high speed.

Further, as shown in FIG. 4, the turntable is slowly rotated, a container with a lid for polishing is placed on the turntable, and a row of magnetic discs is arranged on the lower surface of the turntable with a slight gap. It can also be rotated at high speed.

The polishing container with a lid used in the present invention is made of a non-magnetic material such as plastics or aluminum, can store an object to be polished, and has a size such that a polishing piece can be freely rotated, and the contents during the polishing operation. Requires a lid that does not spill. A cylindrical container whose contents can be exchanged and washed as necessary is preferable. The polishing container has an engaging means that does not fall or fall with the rotation thereof in relation to the belt conveyor or the turntable.

For example, in the case of a vertical type belt conveyor, engaging means is provided on the outer periphery of the belt conveyor itself and has a projection or a ridge capable of engaging with this engaging means. Further, even in the case of a horizontally moving belt conveyor or a turntable, or a vertically moving belt conveyor, when the horizontal bottom plate extends from the lowermost end of the belt conveyor, a means for mounting the polishing container is provided. On the turntable or the horizontal belt conveyor, a fixing means such that the container with a lid is not displaced may be provided, for example, a shallow ridge substantially matching the outer circumference of the container. In the case of a vertical belt conveyor, it is possible to intermittently provide a shallow container capable of accommodating the polishing container.

The polishing container of the present invention is a container made of a non-magnetic material such as plastic or aluminum, and can be attached to and detached from a belt conveyor or a turntable. It is necessary not to shift. An object to be polished, a small piece for polishing and, if necessary, a small amount of polishing liquid for more efficient polishing are poured into the lidded container. The polishing liquid contains a surfactant, a rust preventive, a polish, and the like.

A large number of small pieces for polishing are loaded together with the object to be polished into a polishing container, and these small pieces are magnetized by being exposed to a magnetic field and alternately become S poles and N poles and are connected in a chain. Since the magnetic field instantly reverses, the magnetic field reverses and a part of the magnetic field penetrates into fine irregularities of the object to be polished, and is violently disturbed and vibrated, so that the object to be polished is uniformly polished. As the material of the small pieces for polishing, hard stainless steel, other nickel steel,
Non-corrosive metals such as chrome steel are mentioned. That is,
Any magnetized material that is hard enough to polish metal pieces and that is hard to rust will do. The shape thereof may be rod-like or spherical, but in the case of a magnetized material, the rod-like shape is preferable.

In the final polishing, since it is preferable to give a minute impact extremely frequently, a spherical polishing piece is preferable from the viewpoint of softness of the impact.

According to the present invention, the magnet disks having different rotation directions are provided close to each other, so that in addition to the change in the magnetic field formed by one magnet disk, the change in the magnetic field due to the adjacent magnet disks affects the polishing. The movement of the polishing piece becomes more complicated, and the movement of the polishing piece can be made more complicated and violent even at a relatively low rotation speed. Furthermore, since the container containing the object to be polished moves slowly on the magnet discs arranged by the belt conveyor, it is polished on all parts of various rotary discs, and uneven polishing does not occur. Further, since no use larger magnet disc also extremely diameter, the peripheral speed is safely without exceeding the predetermined value is secured, it is possible to have Tsu name for polishing a large amount of object to be polished at a stroke.

[0017]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a side view with a partial cutout of FIG. 1, and FIG. 3 shows an example of arrangement of permanent magnets on a magnet disc. FIG. 4 is a plan view with a partial cutout of another embodiment, and FIG. 5 is a sectional view of FIG.

Reference numeral 1 is a conveyor belt driven by a vertically installed pulley 2, and the pulley 2 is driven by a motor 3 via a worm gear 4 and a worm wheel 5 while being extremely decelerated. Profile 7 having a dovetail groove 6 at a constant interval on the outer periphery of the conveyor belt 1.
Are fixed as engaging means. 8 is a polishing container having a lid 9. The lid 9 may be any one that does not come off due to the vibration of the polishing container 8. A profile 7 is provided on the outer circumference of the polishing container 8.
The ridge 10 which can slide in the dovetail groove 6 was fixed. When the protrusion 10 of the polishing container 8 is engaged with the dovetail groove 6 of the belt conveyor 1 and pushed down while sliding, the lowering of the container is terminated by the bottom plate 11 of the dovetail groove 6 and the container can be further lowered. Absent.

Reference numeral 12 is a disk storage portion, and inside thereof is a magnet disk 14 driven by a motor 13. Magnet disk 1
4 is a plurality of magnet disks which are directly driven by a motor 13 through a gear 15 and which mesh with a magnet disk coaxial gear 15 which is coaxial with another adjacent magnet disk 14 and which are adjacent to each other. Can be rotated at the same number of rotations in high speed in different directions alternately. The polishing container 8 is located above the magnet disk 14, and the relative position between the belt conveyor and the magnet disk is adjusted.

As shown in FIG. 3, a rod-shaped embedded permanent magnet 16 is embedded in the magnet disk 14. In FIG. 3, two pairs of nodule-shaped S-pole zones S and N-pole zones S are provided, but one pair or three, four, or more pairs may be divided. Each zone has a nodule shape and is arranged along the circumference, but the buried permanent magnets 1 are also provided near the center of the magnet disk as much as possible.
Considered that 6 is placed. A rod-shaped embedded permanent magnet 16 is embedded in the S pole zone S with the S pole facing up, and is indicated as "S" in FIG. 3, and the rod-shaped embedded permanent magnet 16 is placed in the N pole zone N with the N pole facing up. Buried in place and "N" in Fig. 3
Was displayed. Further, if the embedded permanent magnet 16 is sufficiently strong, one permanent magnet may be embedded in each zone.

In this embodiment, a large number of polishing pieces made of magnetic stainless steel having a diameter of 0.5 mm and a length of 5 mm were used in the polishing container 8 to polish a large number of ring frames. Polishing was performed for about 2 hours at a rotation speed of the magnetic disk of about 1000 rpm.
Then, as finishing polishing, a large number of polishing balls made of non-magnetic hard stainless steel having a diameter of 0.6 mm were used as polishing pieces. Multiple agitating magnets were used to vigorously agitate the abrasive balls. The stirring magnet was provided with a polyvinyl chloride cover to prevent the metal to be polished from being contaminated by the magnet material or the permanent magnet being damaged. Further, polishing was carried out in a polishing liquid containing a small amount of a surfactant, a rust preventive and a polish. Reference numeral 17 is a bubble generated at that time. Rotation speed 1500r
As a result of finish polishing for about 1 hour at pm, it was possible to obtain a polished frame in which beautiful and delicate curves that are the same as those of conventional manual work are utilized.

FIG. 4 and FIG. 5 show another embodiment. In this embodiment, a turntable 20 is used instead of the belt conveyor 1. Reference numeral 21 denotes a frame body, which slidably supports the frame body 22 on the outer periphery of the turntable via a bearing 22. Illustration of the support on the inner peripheral surface of the turntable 20 is omitted. 23 is a motor, 24 is a reduction mechanism, 25
Is a magnet disk gear and transmits rotation to the magnet disk coaxial gear 15. Therefore, the rotation speed of the magnet disk 14 is determined by the operation of the reduction mechanism 24. The magnetic disk coaxial gears 15 are arranged on the lower surface of the turntable 20 while meshing with each other. Therefore, the adjacent magnetic discs come close to each other and rotate alternately in the opposite directions without contacting each other.

Numeral 26 is a turntable gear coaxial with the magnet disc gear 25, and meshes greatly with the gear 26 and an internal gear of a turntable lower gear 27 mounted on the lower surface near the inner circumference of the turntable. Is slowing down.
However, if the deceleration is still insufficient, another deceleration mechanism is provided to further decelerate the rotation of the turntable. Reference numeral 28 is a ring-shaped ridge with which the bottom of the polishing container 8 provided on the turntable is fitted. The ridges allow the polishing container 8 to move gently on the turntable without being displaced due to vibration. Also in this example, a large amount of the object to be polished was smoothly polished.

[0024]

EFFECTS OF THE INVENTION A large number of magnetic discs are arranged close to each other and alternately rotated in opposite directions without contacting each other, and a large number of polishing containers are turned by a turntable or a belt conveyor.
According to the present invention, which slowly moves within the magnetic range of the arrayed magnet disks, the movement of the polishing pieces becomes more active, and moreover, a large amount of objects to be polished are polished at once without the diameter of the magnet disks being extremely enlarged. succeeded in.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 having a partial cutout.

FIG. 3 is a plan view showing an example of arrangement of permanent magnets on a magnet disc.

FIG. 4 is a plan view with a partial cutout according to another embodiment.

5 is a cross-sectional view of FIG.

[Explanation of symbols]

1 belt conveyor 2 pulley 6 ant groove 7 Profile 8 polishing container 9 lid 10 ridges 11 bottom plate 12 disk storage 14 magnet disc 15 Magnet disk coaxial gear 16 Embedded permanent magnet 20 turntable 21 frame 22 Bearing 24 Reduction mechanism 25 Magnet Disc Gear 26 Turntable gear 27 Turntable lower gear 28 annular protrusion

Claims (2)

(57) [Claims] 1. A plurality of engaging means are integrally fixed to the outer surface of a belt conveyor driven by a pair of vertical pulleys,
A polishing container made of a non-magnetic material is detachably suspended or placed on the engaging means, and the surface of the disk made of the non-magnetic material is attached to the nodular S-pole zone and N-pole zone along the circumference. , The permanent magnets are embedded in the S pole zone with the upper surface as the S pole, and the permanent magnets are embedded in the N pole zone with the upper surface as the N pole. High-speed rotation is possible.
Multiple magnetic discs,
The vessel lower surface, in close proximity to each other are disposed, polished container suspended or placed on the belt conveyor, arranged on the magnet disc column while maintaining a gap polishing container bottom does not contact the magnet disc
In addition to the above , a mass-production magnetic polishing machine is characterized in that an object to be polished and a large number of magnetic particles for polishing are loaded in a polishing container. 2. A plurality of polishing containers are placed on the surface of a turntable or a belt conveyor which moves with the front and back surfaces horizontal, while the surface of a disk made of a non-magnetic material is attached to a nodular S pole zone and an N pole. Separated alternately along the circumference in the pole zone, a permanent magnet was embedded in the S pole zone with the upper surface as the S pole, and a permanent magnet was embedded in the N pole zone with the upper surface in the N pole, enabling high-speed rotation.
A plurality of magnetic disks are placed close to each other on the lower surface of the belt conveyor or turntable, and are arranged at intervals so as not to contact the belt conveyor or turntable .
That together with the object to be polished in the polishing vessel, mass magnetic polisher, wherein a plurality of abrasive magnetic pieces are charged.