JP2000263415A - Transverse electromagnetic polishing machine and polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the dispersion in magnetic field strength within a vessel and to uniformly polish all parts of a material to be polished by horizontally installing a cylindrical polishing vessel within a hollow cylindrical stator for generating a rotating magnetic field with central axis horizontally placed, and gently rotating this device. SOLUTION: A stator 1 having a number of windings 2 is provided, and a polishing vessel 3 is installed into the stator 1 instead of a rotor in a motor. The polishing vessel 3 preferably has a diameter as large as possible within the range never making contact with the windings 2. A material to be polished 4, a number of magnetic small pieces 5 and an abrasive liquid 6 are put in the polishing vessel 3. Two rotating shafts 9 extended from the circular surfaces 8 of the polishing vessel 3 are easily rotatably supported by rollers 10. The rotating shafts 9 have flanges 11 at the ends, and the flanges 11 are fixed to the circular surfaces of the polishing vessel 3 by screws 12 through packings. According to this, the whole polishing vessel 3 is rotatably journalled to the rollers 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a material to be polished and a large number of magnetic pieces are placed in a container mounted in an alternating magnetic field in which an S pole and an N pole are alternately converted, and the material is covered by violent movement of the magnetic pieces. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal magnetic polishing machine capable of efficiently rotating a polishing container by slowly rotating a polishing container, and a polishing method using the same in an electromagnetic polishing apparatus for polishing an abrasive.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic polishing machine, a permanent magnet S
The pole and the north pole are embedded in a disk made of a nonmagnetic material, and this disk is rotated at a high speed to form an alternating magnetic field on the disk. There has been a method in which a container made of a non-magnetic material is placed in an alternating magnetic field, a material to be polished and a large number of magnetic pieces are placed in this container, and the material to be polished is polished by violent movement of the magnetic pieces in the alternating magnetic field. . This method has no problem when the material to be polished is small, but it has been difficult to uniformly polish a large material to be polished because the central portion of the rotating disk has a weak magnetic force.
Further, strong polishing can be performed near the bottom of the container, but the magnetic force is weakened at the upper portion of the container, and sufficient polishing has not been performed.

[0003] A method has been attempted in which an alternating current is applied to a copper wire wound in a coil shape to form an alternating magnetic field inside the coil, and electromagnetic polishing is performed in the alternating magnetic field. In this case, since the alternating magnetic field is formed in a cylindrical shape, the polishing container also has a cylindrical shape. According to this method, a strong magnetic field is formed near the circumferential surface of the container, and the container is sufficiently polished. However, sufficient polishing is not performed at the center of the container.

[0004]

If the electromagnetic polishing method is further improved and the polishing efficiency is improved, and if the whole material to be polished placed in the polishing container can be uniformly polished by using the electromagnetic polishing method, a large-scale polishing method is required. Can be evenly polished, and the application range of the electromagnetic polishing method can be further expanded.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and the configuration of the present invention is as follows. A hollow cylindrical stator that generates a rotating magnetic field whose center axis is mounted horizontally is provided.
A hollow cylindrical polishing container made of a non-magnetic, non-conductive material is inserted, and the rotating shaft extends horizontally outward from the center of the circular surface at both ends of the polishing container, and the rotating shafts extending in both directions are respectively In addition to being easily rotatably supported, the polishing container is provided with at least one opening and a lid capable of opening and closing the opening so that the opening can be opened and closed. A material and a magnetic piece are inserted and sealed, and a three-phase alternating current is supplied to the stator.

That is, a cylindrical polishing vessel is horizontally placed in a hollow cylindrical stator that generates a rotating magnetic field with its central axis mounted horizontally, and this vessel is gently rotated to produce a magnetic field in the vessel. Variations in strength are eliminated, and all portions of the workpiece are polished uniformly.

Further, when the present inventors load a certain amount of magnetic particles for polishing into the polishing container, the magnetic particles have a function as a rotor, and a central portion of the circular surface at both ends of the polishing container. Finding the fact that the container rotates naturally without applying external force to the rotating shaft of the rotating container by supporting the rotating shaft that extends horizontally outward from the roller with rollers or bearings that facilitate rotation of the rotating shaft It is completed.

As a result, if the material to be polished can move freely in the polishing container, even if there is a difference in the magnitude of the magnetic force in the space in the container itself, it is equalized by the rotation of the polishing container itself. The surface of the material to be polished is uniformly polished. In other words, the present invention has both the advantages of the electromagnetic polishing method for quick polishing and the advantages of the barrel polishing method for uniform polishing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of FIG.
FIG. 5 is an enlarged view of a section surrounded by a dashed line in FIG.

In the present invention, the magnetic field is provided by three-phase alternating current. That is, as shown in FIGS. 1 and 2, a stator 1 having a large number of windings 2 is provided, and a polishing container 3 is inserted into the stator 1 instead of a rotor of a motor. It is preferable that the diameter of the polishing container 3 is as large as possible in a range where the polishing container 3 never touches the winding 2, and the lid 7 is provided so that the opening 23 of the polishing container 3 can be easily sealed. The material is non-magnetic and non-conductive, and plastics such as polyvinyl chloride, ABS, acrylic resin, and polypropylene are preferably used.

A material 4 to be polished, a large number of magnetic pieces 5 and a polishing liquid 6 are charged into the polishing container 3. The purpose of the present invention is achieved without using the polishing liquid 6 in some cases. Reference numeral 9 denotes a rotating shaft extending from the circular surface 8 of the polishing container 3, and the two rotating shafts 9 are rotatably supported by rollers 10. In FIG. 1, the rotating shaft 9 has a flange 11 extending at an end thereof, and the flange 11 is connected to a screw 12 through a packing.
And is fixed to the circular surface of the polishing container 3. Therefore,
The entire polishing container 3 is rotatably supported by the rollers 10 so as to be easily rotated. In addition to the rollers, bearings and the like can be used as those which can easily support the rotating shaft 9.

Reference numeral 13 denotes a handle, which is used to move the polishing container out of the stator 1 after the polishing is completed and to rotate the position of the lid 7 upward. The lid 7 needs to be able to reliably seal the opening 23 provided in the polishing container 3 and is usually screwed via packing. In FIG. 1, two pairs of the opening 23 and the cover 7 are provided on the circumference. However, one pair may be provided, and the pair may be provided on the circular surface 8. When provided on the circular surface 8, one of the rotating shafts 9 is also fixed to the lid 7, so that one of the rotating shafts is also removed when the polishing container 3 is opened and closed.

Since the material to be polished 4, the magnetic pieces 5, the polishing liquid 6 and the like cannot be charged or discharged inside the stator 1, the polishing vessel 3 needs to be pulled out from the stator 1. In FIG. 1, the position of the removed polishing container 3 is shown by a broken line. Numeral 14 denotes a bat for taking out the contents, in which the polishing liquid 6 is separated from the polishing object 4 and the magnetic pieces 5 by the net 1.
5 and a drain pipe 16 for collecting the polishing liquid 6 at the bottom. The rotating shaft 9 preferably has a length that does not hinder the operation of moving the polishing container 3 before and after polishing,
The rollers 10 need to be arranged so that the rotation shaft 9 can be moved smoothly. The length of the rotating shaft and the arrangement of the rollers in FIG. 1 satisfy this requirement.

If the polishing container is small or the polishing container can be moved by other means, the handle 13 and the rotating shaft having a sufficient length are not required. Reference numeral 17 denotes a support for the stator 1, and reference numeral 18 denotes a rotating shaft of the roller. Roller 1
When a bearing is used instead of 0, the polishing container 3 can be moved with less force when the polishing container 3 is taken out of the stator 1 when the polishing container 3 is large or when the polishing container 3 is stored in the stator 1.

Further, when sufficient magnetic small pieces are not loaded in the polishing container, a motor for rotating the polishing container can be mounted on one of the rotating shafts 9. The motor for rotating the polishing container has a speed reduction mechanism.

At the center of the polishing container 3, the influence of the magnetic force from the surrounding stator is reduced, and the center tends to become a dead space. When a conductive and preferably non-magnetic cylinder or column such as aluminum or stainless steel is charged, the movement of the polishing liquid or magnetic particles in the polishing vessel can be activated.
Further, as shown in FIGS. 3 and 4, a locking projection 20 extends from the center of both circular surfaces 8 of the polishing container 3, and a cylinder 21 having a larger diameter than the locking projection 20 is suspended from the locking projection. Let it. In FIG. 3, the cylinder 21 is divided into two parts to facilitate the attachment and detachment from the opening 23 of the polishing container.
However, the connecting means is not always necessary.

When a three-phase alternating current is applied to the stator 1, the inner circumference of the end of the cylinder 21 rotates violently while being in contact with the outer circumference of the locking projection 20, and vigorously agitates the polishing liquid 6 in the polishing container, thereby forming The movement is activated and the polishing efficiency is remarkably improved. Although the diameter of both ends of the cylinder 21 is reduced in FIG. 3, the diameter of the cylinder 21 may be the same throughout.
Reference numeral 24 denotes an opening sealing screw for sealing the opening 23 with the lid 7.

The polishing piece is not limited to a rod, a strip, a sphere or the like made of magnetic stainless steel. In the case of a rod, the length is 3 to 7 mm and the diameter is 0.3 to 1 mm. In the case of a strip, the length is 6 to 18 mm and the width is 2 to 4 mm. Good.

When the amount of the magnetic pieces is 50 g, 100 g, 300 g
g, 500 g,... / The polishing container starts to rotate when the amount of the magnetic small pieces exceeds a certain amount, although it depends on the diameter of the polishing container as the volume in the polishing container increases. The amount of magnetic particles required to rotate the polishing container is 0.1 to 1.0 kg / volume (liter) of the polishing container, preferably 0.3 to 0.9 k.
g / volume in the polishing vessel (liter).

[0020]

EXAMPLE An electromagnetic polishing machine having the shape shown in FIGS. 1 and 2 was manufactured. 400 mm diameter in stator 1 with 500 mm horizontal length
A polishing container 3 having a size of 400 mm and a length of 400 mm and having the shape shown in FIGS. As shown in FIG. 5, the lid 7 was sealed with a lid sealing gasket 25 using an opening sealing screw 24.

Magnetic piece 4 having a diameter of 1.8 mm and a length of 15 mm
The polishing container was charged with the internal volume (liter) of 00 g / polishing container, and the aluminum cylinder 21 shown in FIG. Polishing was performed by using a die-cast magnesium alloy having a complicated shape as a material to be polished, and adding a small amount of a detergent, a rust preventive material, a defoaming material, and a polishing liquid containing an organic acid. A three-phase alternating voltage was applied to the stator 1. 3
After polishing for 0 minutes and taking out the contents, the surface of the material to be polished was smoothed and polished to a satisfactory state. In the case of polishing using a conventional barrel polishing machine, the time required to obtain a similar surface condition was about 6 hours.

[0022]

According to the present invention, the advantages of electromagnetic polishing and barrel polishing can be utilized, and a material having a complicated shape can be efficiently polished in a short time. In addition, since the inside of the polishing container is maintained under uniform polishing conditions, a large-sized workpiece is evenly polished, and the range of use of the electromagnetic polishing method is expanded.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view when a conductive pipe is inserted into a polishing container.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is an enlarged view of a portion surrounded by a chain line in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Winding 3 Polishing container 4 Material to be polished 5 Magnetic small piece 6 Polishing liquid 7 Lid 8 Circular surface 9 Rotating shaft 10 Roller 11 Flange 12 Screw 13 Handle 14 Content extraction butt 15 Net 16 Drain pipe 17 Support stand 18 Roller Rotating shaft 20 Locking projection 21 Cylindrical 22 Connecting means 23 Opening 24 Screw for sealing opening 25 Seal for lid sealing

Claims (7)

[Claims] 1. A hollow cylindrical polishing vessel made of a non-magnetic and non-conductive material is inserted into a hollow cylindrical stator that generates a rotating magnetic field and has a central axis mounted horizontally. The axis of rotation extends horizontally outward from the center of the surface,
The rotating shafts extending in both directions are rotatably supported respectively, and the polishing container is provided with at least one opening and a lid capable of opening and closing the opening. Horizontal magnetic polishing machine. 2. At least one circular surface of the polishing container,
2. An opening, and a lid which seals the opening and can be opened and closed together with the rotating shaft is provided.
The described horizontal magnetic polishing machine. 3. The horizontal magnetic polishing machine according to claim 1, wherein at least one opening and a lid capable of opening and closing the opening are provided on a circumferential surface of the polishing container. 4. A polishing vessel rotating motor is connected to at least one of the rotating shafts.
A horizontal magnetic polishing machine according to any one of the above. 5. A hollow cylindrical polishing vessel made of a non-magnetic and non-conductive material is inserted into a hollow cylindrical stator which generates a rotating magnetic field and has a central axis mounted horizontally, and a circular cylinder at both ends of the polishing vessel. The axis of rotation extends horizontally outward from the center of the surface,
In the horizontal magnetic polishing machine, the rotating shafts extending in both directions are each rotatably supported, and the polishing container is provided with at least one opening and a lid capable of opening and closing the opening. A polishing method, wherein a material to be polished and a magnetic piece are inserted and sealed, and an alternating current is applied to a stator. 6. The polishing container has a volume per volume of 0.1 liter.
6. The polishing method according to claim 5, wherein 1 to 1.0 kg of magnetic pieces are charged. 7. The polishing method according to claim 5, wherein a nonmagnetic conductive pipe is inserted into the polishing container.