JP4130922B2 - Vortex barrel polishing machine - Google Patents

Description

The present invention relates to an improvement in a vortex barrel polishing machine.

The vortex barrel polishing machine constitutes a barrel tank with a cylindrical fixed tank and a rotating disk disposed in the lower part thereof. When the turntable is rotated, the workpiece and polishing stone (hereinafter referred to as mass as necessary) flowed in a spiral shape to perform desired barrel polishing on the workpiece (for example, Patent Document 1). Here, a gap of a certain width was formed between the two so that the rotating disk can rotate with respect to the stationary fixed tank. For this reason, in the vortex barrel polishing machine, the use of fine workpieces and fine grinding stones that enter this gap has been restricted. Therefore, although the vortex barrel polishing machine is very good in terms of processing efficiency, it has limitations in use and cannot cope with all workpieces and polishing stones.

In view of the above problems, the applicant, as shown in FIG. 1, causes the urethane lining 3 formed on the inner wall of the fixed tank 2 to protrude from the lower end, and on the upper surface of the turntable 5 facing the urethane protrusion 4. An apparatus was developed that attaches a ceramic ring 6 and polishes the both while contacting and sliding them (for example, Non-Patent Document 1). In this apparatus, bolts 8 are inserted into a plurality of holes 7 of the outer peripheral flange 2a of the fixing tank 2 and screwed into an under plate 9, and a presser spring 10 is attached around the bolt 8 to a bolt head 8a. The fixed tank 2 is urged downward by hanging. That is, the fixed tank 2 is pressed against the ceramic ring 6 through the protruding portion 4 protruding therefrom by the weight of the fixed tank 2 and the urging force of the plurality of holding springs 10.

Then, water or a compound solution having a constant pressure is supplied into the under plate 9 from the water supply hole 11, and liquid is supplied into the barrel tank 1 through the sliding portion S between the projecting portion 4 and the ceramic ring 6. It was. In other words, the sliding portion S forms a seal on which the ceramic ring 6 rotates and slides with respect to the projecting portion 4, but in order to suppress the heat generated by the seal, liquid is supplied to cool and lubricate the seal. .

With the above configuration, the sliding portion S between the fixed tank 2 and the rotating disk 5 is substantially “zero gap”, and it is possible to use a minute work or a fine grinding stone. In addition, when the mass is discharged after the barrel polishing, the barrel tank 1 is inverted between 90 degrees and 180 degrees. At this time, since the fixed tank 2 is turned upside down, the sliding portion S tries to open by its own weight. If the sliding part S opens, a fine grinding stone or a fine workpiece may enter the under plate 9 from here and damage the sliding part S or damage the rotary shaft 12 that drives the rotating disk 5. However, since the fixed tub 2 is always pressed against the rotating disk 5 by the force of the presser spring 10, the sliding portion S does not open.

However, this vortex barrel polishing machine has no problem with this apparatus configuration when the barrel tank 1 is small. However, when the barrel tank 1 is large, the pressing load on the ceramic ring 6 of the protrusion 4 becomes too large. As a result, the rotation of the rotating disk 5 is excessively loaded, which may result in damage to the rotary shaft 12 and its bearings.
Japanese Patent No. 3062800 Title: [Details of EFF-15], Media Type: [online], Publication Date: [October 2002], Publisher: [Chipton Corporation], Search Date: [November 24, 2005], Internet Address: [http://www.tipton.co.jp/eff15shousai.pdf]

As described above, the problem to be solved by the present invention is that even if the barrel tank 1 is large, the sliding portion S between the fixed tank 2 and the rotating disk 5 can smoothly slide, and the rotating shaft 12 and its bearings are not damaged. The purpose is to provide a machine.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to an eddy current barrel polishing machine comprising a barrel tank composed of a cylindrical fixed tank and a rotating disk rotatably disposed below the cylindrical fixed tank. While the resin lining is formed, a ceramic member is attached to the rotating disk. During barrel polishing, the positioning means of the fixed tank is retracted from the fixed tank and the resin lining is in contact with the ceramic member. When the turntable rotates, the mass in the barrel tank is flown and barrel-polished, and after barrel polishing, when the barrel tank is reversed and the mass is discharged, the fixed tank is positioned by the fixing tank positioning means. And the contact state between the resin lining and the ceramic member is maintained.

Next, the invention of claim 2 is characterized in that, in the invention of claim 1, the resin lining contacts the ceramic member during barrel polishing only by its own weight of the fixed tank.

According to the first aspect of the present invention, during barrel polishing, the positioning of the fixed tank is retracted from the fixed tank, and the rotating disk is rotated while the resin lining is in contact with the ceramic member. The sliding part can slide smoothly without entering the moving part. Also, after barrel polishing, when the barrel tank is inverted and the mass is discharged, the fixed tank is positioned by the fixing tank positioning means so that the sliding part does not open. Since the contact state of the part can be maintained, the fine grinding stone and the fine work do not enter the sliding part.

According to the second aspect of the present invention, only the own weight of the fixed tank is applied to the ceramic member at the time of barrel polishing, so that the sliding portion can slide smoothly and no extra load is applied to the rotating shaft and its bearing. So it will not be damaged. Also, the apparatus configuration is simplified.

The structure of the vortex barrel polishing machine used in the present invention will be described with reference to FIGS. FIG. 2 mainly shows the barrel tank 20 of the eddy current barrel polishing machine of the present invention, and the barrel tank 20 is composed of a cylindrical fixed tank 21 and a rotating disk 22. The cylindrical fixed tank 21 is made of metal, and an inner surface thereof is formed with a urethane lining 23 (resin lining of the present invention). A lower portion thereof is inclined inward together with the fixed tank 21, and a projecting portion 24 at the lower end ( A part of the resin lining of the present invention is protruded from the fixed tank 21 and comes into contact with a ceramic ring 27 described later.

The turntable 22 is also made of metal and has a bowl shape, and a urethane lining 25 is formed on the upper surface. On the curved surface of the urethane lining 25, urethane fins 26 are formed at intervals of 90 degrees for the purpose of enhancing mass flow during barrel polishing. Further, a ceramic ring 27 (a ceramic member of the present invention) is bonded to the outer periphery of the urethane lining 25 at the upper part of the rotating plate 22 so as to slide in contact with the protruding portion 24 of the fixed tank 21. . On the other hand, a rotating shaft 28 is connected to the lower part of the rotating disk 22, and a drain hole 22a drilled in the center of the rotating disk 22 and a drain hole 28a drilled in the center of the rotating shaft 28 are arranged coaxially. The liquid in the barrel tank 20 can be drained.

The rotary shaft 28 is rotatably supported by a support 30 via a bearing 29. A bottomed cylindrical under plate 31 is fixed to the upper portion of the support 30 with bolts or the like. An oil seal 32 is attached between the under plate 31 and the rotary shaft 28 so that water and the compound solution in the under plate 31 do not enter the bearing 29 side. Further, a water supply hole 33 for feeding water or a compound solution into the underplate 31 is provided at one place on the side surface of the underplate 31, and a water supply pipe (not shown) is connected thereto. A stepped portion 31 a is formed on the upper inner side of the under plate 31, and the cylindrical fixed tank 21 is fitted therein. An annular packing 34 is attached to the contact surface between the under plate 31 and the fixed tank 21 on the fixed tank side so that water and compound solution in the under plate do not leak. Further, a flange 31b is formed on the upper outer periphery of the under plate 31, and bolts 35 are attached to three positions on the periphery thereof. The bolts 35 are semicircular cutout portions 21b formed on the flange 21a of the cylindrical fixed tank 21. It has come to penetrate.

A locking nut 36 is attached to the bolt 35, and a support ring 37 capable of supporting the cylindrical fixed tank 21 is screwed onto the bolt 35. That is, if the support ring 37 is screwed upward, the fixed tank flange 21a is lifted, so that the fixed tank 21 can be detached during maintenance. On the contrary, in order to mount the fixed tank 21 that has been detached, first, the support ring 37 is screwed down until it comes into contact with the locking nut 36. Next, the fixed tub 21 is pressed and fitted from above to a position where the protruding portion 24 of the fixed tub 21 contacts the ceramic ring 27 of the turntable 22. At this time, the fixed tank flange 21a and the support ring 37 do not contact each other.

A stopper ring 38 (fixing tank positioning means of the present invention) is attached to the upper portion of the bolt 35 so that the fixing tank 21 does not fall off when the barrel tank 20 is inverted between 90 degrees and 180 degrees. Yes. In other words, after barrel polishing, in order to reverse the barrel tank 20 and discharge the mass, the stopper ring 38 is lowered to contact the fixed tank flange 21a in order to maintain the vertical position of the fixed tank 20 during barrel polishing. Touch. In this way, even if the barrel tank 20 is inverted, there is no gap between the projecting portion 24 of the fixed tank 21 and the sliding portion S of the ceramic ring 27 of the rotating plate 22, and a fine grinding stone or a minute work slips through. Can be prevented.

Near the center of the turntable 22, there is a step portion 22b in which the urethane lining 25 is not formed. A metal cylindrical body 39 having a long hole 39a is attached to the step portion 22b. A net 40 is wound. The metal net 40 has a mesh shape, and allows polishing sludge and drainage smaller than the mesh to pass through. Then, a resin cap 41 is placed so as to surround the metal net 40 and the cylindrical body 39 from above, and a long shaft bolt 42 inserted through the cap 41 is screwed into the turntable 22 to thereby form a cylindrical shape with the metal net 40. The body 39 is fixed to the turntable 22.

A circular hole 41a is formed in the center portion of the cap 41, and a protruding portion 43a of the center pole 43 is fitted into the circular hole 41a. Further, a hole 43b is formed in the center of the center pole 43, and a valve shaft 44 provided with a resin grip 44a at the top and a resin valve 44b at the bottom can be inserted. That is, when the grip 44a of the valve shaft 44 is held by hand and inserted from above the center pole 43, the valve portion 44b at the tip closes the drain hole 22a of the rotating plate 22 and holds the liquid in the barrel tank 20. Yes. A solid line in FIG. 3 indicates a base 45 that supports the support 30 and a motor 46 that drives the rotary shaft 28 provided on the base 45.

Next, the operation of the vortex barrel polishing machine of the present invention will be described. At the time of barrel polishing, the support ring 37 is screwed downward and is in contact with the rotation stop nut 36. The stopper ring 38 is retracted upward so as not to hold down the fixed tank flange 21a. Thus, the cylindrical fixed tank 21 is in a state in which the protruding portion 24 is in contact with the ceramic ring 27 of the turntable 22 by its own weight. That is, the ceramic ring 27 of the turntable 22 is in a state of receiving the full load of the fixed tank 21 via the protruding portion 24 of the fixed tank 21. Subsequently, the valve shaft 44 is inserted from the center pole 43, and the drain hole 22a of the turntable 22 is closed.

Next, a predetermined amount of mass is put into the barrel tank 20. A predetermined amount of the solution containing the compound may be charged directly from above the barrel tank 20 or may be supplied into the barrel tank 20 through the water supply hole 33 via the under plate 31 and the sliding portion S. In any case, the compound solution is filled in the barrel tank 20 so as to reach a predetermined water level, and the underplate 31 is filled so that a constant pressure is applied from the water supply hole 33. When a predetermined amount of the compound solution is contained, the motor 46 is started to rotate the rotating plate 22, and barrel polishing is started. During the barrel polishing, the rotation of the rotating plate 22 causes the ceramic ring 27 to slide and rotate while always in contact with the protruding portion 24 of the fixed tank 21. For this reason, although the sliding part S tends to generate heat, a constant pressure compound solution is always supplied into the under plate 31 from the water supply hole 33 and is supplied into the barrel tank 20 through the sliding part S. Heat generation of the sliding part S is suppressed, and the sliding is performed smoothly. During barrel polishing, the drain hole 22a of the turntable 22 is closed by the valve shaft 44, so that the compound solution in the barrel tank 20 gradually increases, but the supply amount of the compound solution into the barrel tank 20 is as follows. Since it is a very small amount, it does not affect normal polishing for about 1 to 2 hours. In some cases, the drain hole 22a may be left open to drain the excess compound solution.

When the barrel polishing is completed, the rotation of the turntable 22 is stopped and the supply of the compound solution is also shut off. Next, the grasping portion 44a of the valve shaft 44 is lifted by hand, and the drain hole 22a of the turntable 22 is opened to discharge sewage generated by barrel polishing. At this time, the polishing waste such as the abrasion powder of the polishing stone and the scrap of the workpiece passing through the metal net 40 together with the dirty water is discharged together. In addition, the mass is washed by showering from above the barrel tank 20 as necessary.

Next, the mass is discharged. First, the stopper ring 38 is screwed downward to contact the fixed tank flange 21a. Thus, the protruding portion 24 of the fixed tank 21 and the sliding portion S of the ceramic ring 27 of the rotating disk 22 are locked. Next, the barrel tank reversing mechanism (not shown) reverses the barrel tank 20 by about 110 degrees (in the state of the two-dot chain line in FIG. 3), and the mass is discharged into a bucket (not shown) placed under the barrel tank 20. Even in this inverted state, since the fixed tank flange 21a is pressed by the stopper ring 38, there is no gap in the sliding portion S, and a fine grinding stone or a minute work passes through the sliding portion S and enters the under plate 31. Never enter.

<Other embodiments>
In the above embodiment, the ring is formed by integrally molding the ceramic members of the rotating disk. However, the rings divided into small pieces may be arranged in an annular shape. The fixing tank positioning means is such that the stopper ring 38 is attached to the bolt 35 erected from the under plate 31, but the fixing tank 21 may be pressed from outside the barrel polishing machine. In short, anything can be used as long as the upper and lower positions can be locked so that the fixed tank 21 does not fall off when the barrel tank is reversed. Although the protruding portion 24 is integrally formed with the urethane lining 23, the protruding portion 24 may be separated and bonded to the urethane lining 23. In this way, even if the protruding portion 24 is worn by the sliding portion S, only the protruding portion 24 needs to be replaced. The resin lining is not limited to the urethane linings 23 and 25, and may be any material that suppresses the wear of the inner wall of the barrel tank.

Front sectional view of a conventional vortex barrel polishing machine Front sectional view of the vortex barrel polishing machine of the present invention The figure which showed typically the side of the eddy current barrel polisher of this invention

Explanation of symbols

20 barrel tank 21 cylindrical fixed tank 22 turntable 23 resin lining (urethane lining)
24 Resin lining (projection)
27 Ceramic parts (ceramic rings)
38 Fixing tank positioning means (stopper ring)

Claims (2)

In the vortex barrel polishing machine provided with a barrel tank composed of a cylindrical fixed tank and a rotating disk rotatably disposed in the lower part thereof, a resin lining is formed on the inner wall surface of the fixed tank, A ceramic member is attached. During barrel polishing, the positioning means of the fixed tank is retracted from the fixed tank, and the rotating plate rotates while the resin lining is in contact with the ceramic member. When the barrel tank is inverted and the mass is discharged after the barrel polishing is completed, the fixed tank is positioned by the fixing tank positioning means, and the resin lining and the ceramic member are in contact with each other. A vortex barrel polishing machine characterized by maintaining the condition. 2. The vortex barrel polishing machine according to claim 1, wherein the resin lining is brought into contact with the ceramic member during barrel polishing only by its own weight of the fixed tank.

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