JPH09225809A - Container to be used for magnetic polishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the motion of polishing material complicated to thereby improve the polishing efficiency of a device for performing polishing by the self rotation of polishing material with a material to be polished and magnetic small piece for polishing being set in a polishing container by arranging at least one or more of interference plate protruding from a bottom surface at a bottom of the container made of non-magnetic material. SOLUTION: A magnetic polishing machine has a magnetic disc 1 in which a plurality of permanent magnets 3 are burried with the S pole is positioned upward, and both ends of rotation shaft 2 are made S-pole zone S. A fixed plate 4 is fixed on the disc 1 via a clearance 5 in a range where it is not brought into contact with the disc 1, and in a space formed between the plate 4 and a cover 8 of the polishing machine a container made of non-magnetic material is stored. In the container 10 a material to be polished and a plurality of rod-like polishing members are set and at a boom of the container 10 e.g. two interference plates 12 crossing at the center are arranged. The height of the interference plate 12 is made 1/4 or below of the depth of the container 10. Accordingly the movement of the polishing materials it complicated, resulting in the provision of excellent polishing effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing container used in a magnetic polishing machine for improving polishing efficiency. A magnetic disk having a powerful S-pole zone and N-pole zone formed by alternating permanent magnets with a magnetic grinder is rotated at high speed, and a fixed plate provided with a slight gap on the magnet disk. Place a polishing container made of a non-magnetic material on top, and insert the material to be polished and a number of rod-shaped magnetic particles for polishing into the polishing container and remove the material to be polished by vigorous rotation of the abrasive due to changes in the magnetic field. It is to be polished.

[0002]

2. Description of the Related Art The inventors of the present invention have disclosed in Japanese Patent Application Laid-Open No. 2-180557 that a strong S is generated by alternating permanent magnets.
While rotating a magnet disc having a pole zone and an N pole zone at high speed, a polishing container made of a non-magnetic material is placed on a fixed plate provided on the magnet disc with a slight gap. , A magnetic polishing machine was proposed in which a material to be polished and a large number of rod-shaped magnetic particles for polishing were loaded in a polishing container and the material was polished by vigorous rotation of the abrasive due to a change in magnetic field. Unlike conventional barrel grinders, this grinder does not move much of the material to be polished and only the abrasive rotates violently.
The materials to be polished are not efficiently collided with each other and can be efficiently polished without damaging the complicated shape or delicate shape of the materials to be polished, and have contributed to a remarkable improvement in polishing efficiency according to various materials and various applications.

[0003]

With the spread of the above-mentioned polishing machines, the material to be polished, the purpose of polishing, and the shape of the material to be polished are expanded, and the dental materials initially used for dentures and the like, precious metals for jewelry and non-metals The main purpose was to polish magnetic metals, but the types of raw materials for magnetic metals such as iron, plastics, ceramics, etc. and materials to be polished have also expanded. Magnetic metals such as iron and steel were sensitive to the magnetic field, and it was thought that polishing pieces could not be rotated sufficiently and polishing would be impossible, but it is difficult to actually carry out, but it is possible. Met.

In a strict sense, there is no cut or molded article, regardless of material, that is free of burrs. Burrs must not be present in parts that require precision in actual applications, and deburring is a difficult task. Especially for minute parts, deburring may be done manually by using a microscope. In order to cope with such a variety of applications, it is effective to vigorously rotate the polishing piece, and therefore, even if the rotation speed of the magnetic disk is increased, there is a limit to the polishing efficiency of the polishing piece. Therefore, there has been a demand for means for further improving the polishing efficiency of the polishing pieces.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and the structure is such that the surface of a disk made of a magnetic material is alternately formed into an S-pole zone and an N-pole zone.
A permanent magnet is embedded in the pole zone with the S pole as the upper surface, and a magnet disc with the upper pole as the N pole and which is embedded with the permanent magnet can be rotated at a high speed in the N pole zone. Keeping a fixed plate made of a non-magnetic material, a container made of one or more non-magnetic materials is detachably loaded on the fixed plate, and a large number of abrasives made of a material to be polished and a magnetic material are placed in the container. A magnetic polishing machine for loading rod-shaped small pieces is characterized in that one or more baffle plates protruding from the bottom surface are provided on the bottom of a container made of a non-magnetic material.

Polishing rod-shaped pieces made of many magnetic materials, that is, abrasives, which are loaded on the bottom of the container under the influence of the magnetism of the magnet disc, are magnetized under the influence of the magnetism of the magnet disc.
Those in the south pole zone rise with the north pole facing down. However, since the magnet disk is rotating, the N pole immediately approaches and falls toward the N pole which is being affected by the N pole and is approaching, and when the bottom of the polishing material becomes the N pole, the S pole is lowered. That is, the vertical position is reversed and rises, and then the approaching N pole is affected and falls toward the approaching N pole. That is, at the bottom of the container, the abrasive repeats the above-mentioned movement and vigorously rotates. If the rod of the rod-shaped abrasive is long, the peripheral speed of both ends of the rod increases as the abrasive rotates, and it collides hard with the material to be polished, improving the polishing efficiency, but there is a limit to the practical rod length. is there.

Observing the movements of the abrasive and the material to be polished in the container during polishing, the relative positions of the materials to be polished are kept substantially constant while the entire material to be polished and the material to be polished are I found the fact that it is spinning slowly. Therefore, the present inventor provided a jammer plate that inhibits this slow rotation at the bottom of the container, and the abrasive material hitting the jammer board is rotated in the opposite direction while rotating and the movement of the entire abrasive material becomes more complicated. At the same time, they have completed the present invention by finding the fact that polishing efficiency is also improved. That is, a large number of rod-shaped abrasives move in various directions while rotating, complicating the movements of the abrasives as a whole, thereby succeeding in obtaining better polishing efficiency.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic polishing machine according to the present invention is shown in FIG.
It has a sectional structure as shown in FIG. 1 is a magnet disk,
A rotary shaft 2 driven by a motor (not shown) is provided at the center, and both ends of the rotary shaft 2 are S pole zones S in FIG. That is, a plurality of permanent magnets 3 are embedded in the magnet disc 1 with the S pole facing up. In FIG. 1, the magnet disk 1 is divided into approximately four equal parts, and the S-pole zones S and the N-pole zones are alternately arranged. Therefore, the rear side and the front side of the rotary shaft 2 are the N-pole zones. It is sufficient that the S-pole zones and the N-pole zones are arranged alternately, and there is no limitation on the specific arrangement thereof and the number of each S-pole zone and N-pole zone. Further, one S-pole zone or N-pole zone may be composed of one permanent magnet or a plurality of permanent magnets. Any permanent magnet arrangement may be used as long as it can vigorously rotate the polishing rod-shaped small pieces.

A fixing plate 4 is fixed on the magnet disc 1 through a clearance 5 which is as narrow as possible within a range in which there is no possibility of contact with the magnet disc 1. Reference numeral 6 denotes a wall surface of the polishing machine, and it is preferable to provide a rubber layer 7 for preventing vibration on the inner surface of the fixed plate 4. Although not shown, 8 is a lid of the polishing machine, which is opened and closed by a hinge, and 9 is a handle used for opening and closing. All the members mentioned above use non-magnetic materials except for the permanent magnet 3.

FIG. 2 is a perspective view showing an embodiment of the container of the present invention with a partial cutout. 10 is a container housed in a space formed between the fixed plate 4 and the lid 8 of the polishing machine, and is not particularly limited as long as it is made of a non-magnetic material, but polypropylene, polyvinyl chloride, high density Plastics such as polyethylene are preferable in terms of transparency, ease of handling, durability, manufacturing unit price and the like. The container 10 can be easily loaded and unloaded with the lid 8 of the polishing machine opened. There is no limitation on the size or shape of the container 10 such that one container can be charged or two or three or more containers can be charged. In use, a container having a preferable size is used according to the amount of the non-abrasive material.

An object to be polished and a large number of rod-shaped abrasives are charged in a container, preferably a polishing liquid in which a chemical agent such as a surfactant or a rust preventive is dissolved, and the container lid 11 is sealed. And load it into the polishing machine. Although not shown in FIGS. 1 and 2,
The bottom of the container 10 is charged with a material to be polished, a large number of polishing rod-shaped pieces, and preferably a polishing liquid. The amount of these charges is about ¼ or less of the depth of the container, but the polishing rod-shaped pieces move rapidly, and unless the container lid 11 is provided, the polishing rod-shaped pieces scatter out of the container. The polishing rod-shaped small piece is preferably a material that has weak magnetism and does not react with the material to be polished. For example, magnetic stainless steel is a preferred material. The size is empirically a length of 3 to 6 mm, preferably 4.5 to 5.5 mm,
Diameter 0.3-0.7 mm, preferably 0.4-0.6 mm
It is.

In the present invention, the jammer plate 12 is provided at the bottom of the container 10. The baffle plate 12 has only to project from the container bottom 13 toward the container lid 11 as shown in FIG. 2, and may have a rectangular cross section, a triangular cross section, or an inclination to one side. 1 and 2, two baffle plates 12 that intersect at the center of the bottom of a circular container are provided, but one baffle plate 12 has the effect of the present invention, but three or more baffle plates 12 can be provided. Further, the baffle plate 12 does not have to pass through the center point of the container, and the effect of the present invention can be obtained even if it is provided at the end of the container. Also, in the center of the bottom of the container, near the wall of the container,
Jamming board 1 with one or more missing parts in other parts
Even if 2 is used, a more excellent polishing effect is obtained depending on the type of material to be polished.

Further, even if the baffle plate 12 extending from the wall surface of the container 10 toward the inside of the container is provided, it has a more excellent polishing effect depending on the kind of the material to be polished. Different effects are obtained depending on whether the extended baffle plate and the baffle plate extended from the container bottom are connected or apart. The baffle plate 12 is required to have an effect of disturbing the movement of the rod-shaped abrasive other than the rotation of the rod, and therefore, the vicinity of the container bottom 13 where the abrasive is densely worked effectively, so that the inner surface of the container is generally used. 1/4 of the depth of
The following is sufficient, preferably 1/5 to 1 of the depth of the inner surface
/ 20, more preferably 1/6 to 1/10.

[0014]

Example A polishing machine having a diameter of 500 mm, a height of 800 mm, and a motor having an output of 0.75 kwh at the bottom was used.
The magnet disk 1 was made of a non-magnetic aluminum alloy, and two S-pole zones and N-pole zones were alternately provided, and nine permanent magnets 3 were embedded in each zone as densely as possible. Since samarium cobalt was used as the permanent magnet material to obtain a strong magnetic force, the shortest distance between the embedded permanent magnets and the permanent magnet was about 0.7 when the magnet diameter was 1. The area where the container on the top of the polishing machine can be loaded is 350 mm in diameter.
mm and a depth of 150 mm.

The container is made of polypropylene with a thickness of about 1 mm, has a diameter of 300 mm and a depth of 120 mm, and has a thickness of 1.5.
A container having a shape in which two jamming plates 12 mm in height and 15 mm in height cross each other at the center of the container bottom and stand upright from the container bottom 13 was used. As a material to be polished, about 20,000 precision machine parts having two holes with a diameter of 0.5 mm and a thickness of 0.1 mm and an area of about 8 mm ² were used. This part has a minute burr around the hole, and unless the burr is removed, the performance required for precision machinery cannot be maintained. In the prior art, this deburring is done manually by using a microscope, and 10 hours a day by 8 hours working.
I got only 00.

As a rod-shaped small piece for polishing, 1 kg of a small piece made of magnetic stainless steel having a length of 5 mm and a diameter of 0.5 mm was used. Next, a polishing liquid containing a surfactant was poured, the container lid 11 was covered, and the container was charged into a polishing machine and polished at 1500 rpm for 20 minutes.
After polishing, the product around the hole had burrs removed, and was visually comparable to the product obtained by hand, and the performance required for precision machinery was similar to the product produced by hand.

Further, without closing the lid of the polishing machine, the magnet disk 1 is rotated inside the semi-transparent container of the present invention with the material to be polished, the polishing rod-shaped pieces and the polishing liquid contained in the container. Observing the movement of the small piece, the small piece moves in the circumferential direction as a whole while violently rotating, but the small piece that collides with the baffle plate 12 is inverted by the impact as shown by the arrow in FIG. It was found that small pieces rotating clockwise and small pieces rotating counterclockwise while co-rotating, and these complicated movements improve the polishing performance.

[0018]

According to the present invention in which the shape of the polishing container is slightly improved, the polishing performance of the polishing machine by magnetic force has been successfully improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the base technology of the present invention.

FIG. 2 is a perspective view of a first embodiment of the present invention with a partial cutout.

[Explanation of symbols]

 1 Magnet Disc 2 Rotating Shaft 3 Permanent Magnet 4 Fixing Plate 5 Clearance 6 Polishing Machine Wall 7 Rubber Layer 8 Polishing Machine Lid 9 Handle 10 Container 11 Container Lid 12 Jammer Plate 13 Container Bottom S S Polar Zone

Claims (3)

[Claims] 1. The surface of a disk made of a magnetic material is alternated,
An S pole zone and an N pole zone are provided. A permanent magnet is embedded in the S pole zone with the upper surface being the S pole.
A magnetic disk having poles and embedded permanent magnets that can rotate at high speed is provided, a fixing plate made of a non-magnetic material is provided on the disk with a slight gap, and one or more non-magnetic materials are provided on the fixing plate. In a magnetic polishing machine in which a container made of non-magnetic material is loaded in a removable manner, and a large number of polishing rod-shaped pieces made of a material to be polished and a magnetic material are loaded in the container. A container for use in a magnetic polishing machine, which is provided with one or more protruding baffle plates. 2. The container used in the magnetic polishing machine according to claim 1, wherein the baffle plate is provided radially through the center of the container. 3. The container used in the magnetic polishing machine according to claim 1, wherein the height of the baffle plate is 1/4 or less of the depth of the container.