JPWO2015064158A1 - Barrel tank for centrifugal barrel machine, manufacturing method thereof, and centrifugal barrel polishing machine - Google Patents

Abstract

In one embodiment, a barrel tank for a centrifugal barrel polisher is provided in which a polishing space into which a mass is charged is formed. The barrel tank is composed of a main body and a lid, and at least either the main body or the lid is entirely composed of rubber to which wear resistance is imparted. Since the weight is lighter than the conventional barrel tank, the burden on the operator can be reduced. Further, since all the corners of the polishing space can be curved by using wear-resistant rubber, all the workpieces can be processed uniformly.

Description

  The present invention relates to a barrel tank of a centrifugal barrel polisher, a manufacturing method thereof, and a centrifugal barrel polisher.

  A centrifugal barrel polishing machine is known as a barrel polishing machine that performs barrel polishing such as deburring, surface roughness adjustment, rounding, and gloss finishing of a workpiece. Centrifugal barrel polisher refers to mass (all materials charged in barrel tank. Workpiece and polishing media for dry polishing, workpiece and polishing media and water for wet polishing, as required. This is an apparatus for polishing a workpiece by causing planetary motion (self-revolving) of a plurality of barrel tanks charged with a compound charged) and fluidizing a mass in the barrel tank.

  As shown in Patent Document 1, for example, the barrel tank is generally composed of a metal casing and a polyurethane resin fixed as a lining material inside the casing.

JP 2004-042664 A

  When polishing by the centrifugal barrel polishing machine, the operator manually sets the barrel tank removed from the centrifugal barrel polishing machine in the centrifugal barrel polishing machine. After the polishing is completed, the operator manually removes the barrel tank from the centrifugal barrel polishing machine. Since the barrel tank of the conventional configuration uses a metal casing, it is heavy. Therefore, the burden on the worker is large.

As a further problem, there is a method for fixing the lining material. The method of fixing a lining material in a barrel tank having a conventional configuration is as follows: (1) Adhering a molded one in the shape of a barrel tank, (2) Adhering a plate-shaped lining material, (3) A molten lining material There is a method of solidifying after spraying on the inner wall of the barrel tank, but each fixing method has the following problems.
In the case of (1), a mold is required. Therefore, when making a design change such as changing the thickness of the lining material, a new mold must be manufactured. Since the mold is expensive, the design cannot be changed easily.
In the case of (2), a seam of the lining material occurs. Depending on the shape of the workpiece, since the workpiece enters the seam, it is not possible to uniformly polish all the workpieces (this polishing state is hereinafter referred to as “polishing unevenness”). In addition, since there are corners that are acute or obtuse, they cause not only uneven polishing but also cause damage such as chipping and cracks to the workpiece due to polishing.
In the case of (3), it is difficult to apply the thickness of the lining material uniformly. When the thickness of the lining material is not uniform, uneven polishing occurs. Moreover, since the wear is severe in the thin part, the replacement of the lining material is accelerated.

  Since the conventional barrel tank has the above-mentioned problems, a new barrel tank that overcomes these problems has been demanded.

In view of the above problems, the present invention is a barrel tank for a centrifugal barrel polishing machine that includes a main body and a lid, and in which a polishing space into which a mass is inserted is formed. Any one of the above is characterized by being composed of rubber imparted with wear resistance (hereinafter referred to as “abrasion resistant rubber”). Here, the wear-resistant rubber refers to a rubber having a measured value in a range of 350 mm ³ or less in an Akron abrasion test defined by JIS (Japan Industrial Standards) K6264-2 (2005). Because it does not use a metal casing, it is lighter than a conventional barrel tank. Therefore, the burden on the operator is reduced. Moreover, since the weight of a barrel tank is light, the output of the motor which drives a centrifugal barrel polisher can be made small. Since the main body is a larger member than the lid, it is possible to reduce the weight sufficiently by configuring the entire main body with wear-resistant rubber, but it is lighter if the entire main body and lid are each composed of wear-resistant rubber. Can be In addition, the whole at least one of a main body or a lid | cover means the part for exhibiting the function as a main body or a lid | cover of a barrel tank among main bodies or a lid | cover. That is, the barrel tank according to one aspect of the present invention is sufficient if the main body or the entire lid is made of rubber with wear resistance performance, for example, a component for fixing the main body and the lid, Additional parts such as a part for fixing the barrel tank to the centrifugal barrel machine and a member for informing the wear limit of the barrel tank may be made of a material other than the wear-resistant rubber.

  Further, the polishing space into which the mass is inserted may have a polygonal column shape, and all corner portions may be curved surfaces. Since there is no obtuse angle or right-angled portion, polishing unevenness does not occur.

  Further, the area of the cross section of the polishing space may be constant at an arbitrary position in the height direction. Thereby, the finished degree of the workpiece can be made uniform without being affected by the shape of the workpiece.

  Further, at the joint surface of the main body and the lid, a convex portion for improving the sealing property of the polishing space is provided on either the main body or the lid, and deformation restriction is provided on the outer periphery of the convex portion. The member may be fixed. Since the convex portion is deformed according to the shape of the facing surface, the sealing performance of the space inside the barrel tank is improved. Moreover, when a convex part deform | transforms more than necessary in the outer peripheral direction of a barrel tank, it will cause a sealing performance to deteriorate. By further providing the deformation restricting member, it is possible to prevent deformation of the convex portion in the outer peripheral direction.

  Further, a sign sheet for informing the wear amount of the resin may be embedded in the main body or the lid. The inner wall surface with which the mass contacts is worn by barrel polishing. As the wear progresses, the machining ability decreases, and the degree of machining cannot be managed. Therefore, it is necessary to replace the barrel tank before the processing capacity is affected. Since it is possible to know the timing of replacement with the sign sheet embedded in the barrel tank, it is easy to manage the processing level.

  The sign sheet may be a cloth made of nylon. In addition to the effect of notifying the replacement timing of the barrel tank, an effect of improving the strength can be further obtained. Further, even if the sign sheet is exposed on the surface during barrel polishing, the properties of the workpiece are not affected.

  Moreover, the manufacturing method of the main body or the lid in the barrel tank for the centrifugal barrel polishing machine includes a step of preparing a forming jig including a member having the same shape as the recess forming the polishing space in the main body or the lid, and a raw rubber for the member. A step of curing the coated raw rubber to obtain a molded body, a step of adjusting the outer shape of the molded body, and a step of removing the molding jig from the molded body after grinding. . Since the green rubber can be formed by wrapping around the member, a mold as described above is not required. In addition, since the shape of the member is the inner wall surface of the barrel tank, the corner of the inner wall surface of the barrel tank is curved by processing the square surface of the polygonal columnar member to have a predetermined curvature. Can do.

  Moreover, the manufacturing method of the main body or the lid in the barrel tank for the centrifugal barrel polishing machine includes a step of preparing a forming jig including a member having the same shape as the recess forming the polishing space in the main body or the lid, A step of coating a raw rubber of a thickness of, a step of fixing the sign sheet to at least a side peripheral surface of the coated raw rubber, a step of further covering the raw rubber, a step of obtaining a molded body by curing the coated raw rubber, You may include the process of adjusting the outer shape of the said molded object, and the process of removing the said forming jig from the molded object after grinding. The position where the sign sheet is embedded can be easily set.

  In one aspect of the present invention, a centrifugal barrel polishing machine including a plurality of the barrel tanks is provided. This centrifugal barrel polisher is a disc-shaped turret configured to be rotatable about a revolution axis, and a plurality of barrel tank cases provided to the turret via individual rotation axes, and a barrel tank accommodated in the barrel tank case A plurality of barrel tank cases configured to be individually rotatable around a rotation axis, and the revolution axis of the turret is inclined with respect to a horizontal plane, and each of the rotation axes of the plurality of barrel tank cases is arranged A base part arranged in parallel to the revolution axis, a drive mechanism for rotating the turret around the revolution axis, and a plurality of barrel tanks individually rotated around the rotation axis following the rotation of the turret. A driven mechanism. According to the centrifugal barrel polishing machine on one side, the workpiece is polished in a state where the barrel tank is inclined, so that damage to the workpiece due to polishing such as chipping and cracks can be reduced.

  The base portion includes a first base having a first inclined surface inclined at an angle of 30 degrees or more and 70 degrees or less with respect to a horizontal plane, and a second inclined surface perpendicular to the first inclined surface. And a second base that supports the revolution axis on the second inclined surface so that the revolution axis is arranged perpendicular to the second inclined surface.

According to the present invention, a barrel tank for a centrifugal barrel polishing machine, which is lighter than a conventional barrel tank and suppresses uneven polishing of a workpiece and damage to the workpiece during polishing, and a centrifugal barrel equipped with the barrel tank A polishing machine can be provided.
The barrel tank of the present invention can be used in both dry and wet barrel polishing.

It is a schematic diagram for demonstrating the barrel tank of one Embodiment. FIG. 1A is a partial cross-sectional view of the main body and the lid as seen from the front direction, and FIG. 1B is a plan view of the main body (as viewed from arrows AA in FIG. 1A). It is a flowchart which shows the manufacturing method of the barrel tank of one Embodiment. It is a schematic diagram for demonstrating the structure of the centrifugal barrel polisher which set the barrel tank of one Embodiment. FIG. 3A is a schematic diagram showing a configuration of a centrifugal barrel polishing machine, and FIG. 3B is a schematic diagram showing a B-C-D-E arrow in FIG. It is a schematic diagram for demonstrating the method to fix the barrel tank of one Embodiment to a barrel tank case. FIG. 4A is a partial cross-sectional view of the barrel tank case viewed from the front direction, and FIG. 4B is a schematic diagram illustrating a FF perspective view in FIG. It is a schematic diagram for demonstrating another method of fixing a barrel tank to a barrel tank case. It is a mimetic diagram for explaining another form of a centrifugal barrel polisher.

  The barrel tank of one embodiment will be described with reference to FIGS. The present invention is not limited to the following embodiment, and a part thereof can be changed as necessary. In the following description, the up / down / left / right directions refer to directions in the drawings unless otherwise specified. 3 to 6, the snap lock C and the handle mounting jig H of the barrel tank 01 are omitted for convenience.

(Structure of barrel tank)
FIG. 1A is a partial cross-sectional view schematically showing a barrel tank according to one embodiment, and FIG. 1B is a plan view of a main body of the barrel tank according to one embodiment. The barrel tank of one embodiment is a barrel tank for a centrifugal barrel polishing machine that includes a main body portion including a cylindrical side surface and a bottom surface and a lid portion, and defines a polishing space by the main body portion and the lid portion. The whole main body part (main body 10) or the whole lid part (lid 20) is made of a rubber provided with wear resistance, which is a form of resin. Hereinafter, the barrel tank 01 shown in FIGS. 1A and 1B will be described in detail.

  As shown in FIG. 1A, the barrel tank 01 is configured to include a cylindrical main body 10 having an open upper end and a cylindrical lid 20 having an open lower end. The main body 10 has a side part SW and a bottom part BW. The side portion SW includes a side outer surface 13 that faces the outer space of the main body 10 and a side inner surface 15 that is a surface located inside the side outer surface 13. The bottom BW is connected to the lower end of the side SW, and includes a bottom outer surface 14 facing the outer space of the main body 10 and a bottom inner side surface 16 which is a surface located on the inner side of the bottom outer surface 14. . The main body 10 is formed with a recess 11 that is a space surrounded by the side inner surface 15 and the bottom inner surface 16.

  Similarly, the lid 20 includes a side portion SP including a side portion outer surface 23 facing the outer space of the lid 20 and a side portion inner side surface 25 which is a surface located inside the side portion outer surface 23, and an upper end of the side portion SP. And a top portion TP including a top portion outer surface 24 facing the outer space of the lid 20 and a top portion inner side surface 26 positioned on the inner side of the top portion outer surface 24. The lid 20 has a recess 21 that is a space surrounded by the side inner surface 25 and the top inner surface 26.

  When barrel polishing is performed, the upper end surface 12 of the main body 10 and the lower end surface 22 of the lid 20 are brought into close contact with each other to form a cylindrical container. Inside the barrel tank 01, a polishing space S which is a continuous space and a sealed space is formed by the concave portion 11 of the main body 10 and the concave portion 21 of the lid 20. That is, the side surface in the polishing space S is a surface formed by the side inner surface 15 and the side inner surface 25, the bottom surface is the bottom inner surface 16, and the top surface is the top inner surface 26.

  The polishing space S is a space in which a mass is inserted when performing barrel polishing. Since the planar shape of the polishing space S (cross section in FIG. 1A) is a polygon, the mass is easily fluidized, so that the polishing ability is improved. The shape of the polishing space S is not particularly limited as long as the mass can be fluidized, but in this embodiment, it is an octagonal prism shape as shown in FIG.

  All corners of the polishing space S (an octagonal corner that is a cross section, a corner formed by a side surface that is a surface orthogonal to the octagon, a bottom surface that is a surface orthogonal to the side surface, and a top surface) Are all curved. That is, the inner wall facing the polishing space S has a polygonal cross section, the corners forming the vertices of the polygon on the inner wall, the corners formed by the side SW and the bottom BW, and the side A corner formed by the part SW and the lid 20 has a predetermined curvature. In addition, the curvature of these corner | angular parts may mutually differ. If the corner is not curved, the workpiece enters and stays in the corner when barrel polishing, causing uneven polishing, or damage such as chipping or cracks on the workpiece during barrel polishing. May occur. On the other hand, it is possible to suppress uneven polishing by making the corners curved. The curvature radius of this curved surface can be selected from R10 mm to 50 mm. If R is too small, polishing unevenness due to retention of the workpiece occurs, and if R is too large, the flow state of the mass varies from point to point in the polishing space, resulting in polishing unevenness. Further, if the lid 20 has a configuration in which a part of the side surface of the polishing space S is formed, all corners of the polishing space S can be curved.

  Both the main body 10 and the lid 20 are made of resin. Here, the resin is a concept including a polymer material such as rubber. The resin must not be deformed more than necessary when it is fixed to a barrel grinder, the inner wall surface must not be deformed more than necessary during barrel polishing, the inner wall surface must not be too hard, and the inner wall surface should not be worn. The material is not particularly limited as long as it satisfies the requirement of strong nature. In the present embodiment, rubber (abrasion resistant rubber) having a hardness of A30 to A90 measured with a deciometer (type A) defined in JIS 6253-3 (2012) and provided with wear resistance is used. . If the hardness is too low, the impact force is absorbed more than necessary when the mass collides with the inner wall surface of the barrel tank 01, resulting in poor polishing efficiency or uneven polishing. If the hardness is too high, the barrel tank 01 will wear faster due to the impact force described above. Wear-resistant rubber includes NR (natural rubber), BR (butadiene rubber), SBR (styrene-butadiene rubber), NBR (nitrile rubber), etc., but the hardness, wear resistance, It can be appropriately selected in consideration of chemical properties.

  However, even if wear-resistant rubber is used, it is inevitable that the inner wall surface is worn by barrel polishing. As wear progresses, the shape of the polishing space S changes, so the degree of finish changes. Therefore, it is necessary to replace the barrel tank 01 with a new one before the finish level is affected. Therefore, a sign sheet 17 for notifying the wear limit that is the replacement time of the barrel tank is provided between the side outer surface 13 and the side inner surface 15 and between the bottom outer surface 14 and the bottom inner surface 16. Is provided. The sign sheet 17 is embedded at a position away from the inner wall surface of the main body 10 by a predetermined distance t. The predetermined distance t is set according to the material of the main body, the shape of the polishing space, and the like. The predetermined distance t in this embodiment is selected from 3 to 10 mm. In the example shown in FIG. 1A, the sign sheet 17 is embedded in both the side part SW and the bottom part BW, but may be embedded only in either the side part SW or the bottom part BW. Further, the sign sheet 17 may be embedded in the side part SP or the top part TP of the lid 20.

  The sign sheet 17 only needs to be embedded at a position separated from the inner wall surface by a predetermined distance t. For example, the sign sheet 17 can be selected from a wire mesh, a cloth such as nylon or cotton, and a film. Appearance of the sign sheet 17 can be confirmed when the mass is changed. That is, since it cannot be confirmed during polishing, when the sign sheet 17 appears during polishing, barrel polishing is performed with the sign sheet 17 exposed on the inner wall surface. When the strength of the sign sheet 17 is low and the adhesion with the material of the main body is low, a part of the sign sheet 17 is mixed into the mass due to barrel polishing, which becomes a contaminant. If the hardness is too high, the workpiece is damaged by the sign sheet 17 during barrel polishing. For the sign sheet 17 of this embodiment, a cloth made of nylon was selected.

  In one embodiment, in order to improve the sealing property (sealing property) of the polishing space S, the upper end surface (joint surface of the space) 12 of the main body 10 is formed with a convex portion 18 protruding upward. The convex part 18 is comprised from the same material as the main body 10, and has moderate elasticity. According to the convex portion 18, when the lid 20 is brought into pressure contact with the main body 10, the convex portion 18 is deformed according to the shape of the lower end surface 22 of the lid 20, so that the adhesion between the main body 10 and the lid 20 is improved. . The convex portion 18 may be formed on the lower end surface 22 of the lid 20. In this case, the convex portion 18 is formed so as to protrude downward from the lower end surface 22 of the lid 20.

  The convex part 18 is provided along the side part inner side surface 15, and the outer edge forms circular. A deformation regulating member 19 is bonded to the outer periphery of the convex portion 18. When the protrusion 18 is deformed more than necessary in the outer circumferential direction, a step is generated at the boundary between the main body 10 and the lid 20. This level difference causes uneven polishing. By providing the deformation restricting member 19, it is possible to prevent unnecessarily deformation in the outer peripheral direction. The deformation restricting member only needs to have sufficient strength to suppress deformation of the convex portion in the outer peripheral direction, and the material thereof can be selected from metals, plastics, ceramics, and the like. In the present embodiment, a metal annular plate is used.

  In addition, a cylindrical jig mounting member 19 a that can enclose the upper part of the side peripheral surface of the main body 10 is suspended downward from the deformation regulating member 19. The length of the jig attachment member 19a may be a length to which a snap lock C, a handle attachment jig H, etc., which will be described later, can be attached.

  The outer diameter of the side SW in the main body 10 is continuously reduced toward the bottom. As will be described later, the barrel tank 01 is not displaced with respect to the barrel tank case at the time of barrel polishing, and the barrel tank 01 can be easily attached and detached. In this embodiment, the inclination angle of the side part SW with respect to the direction perpendicular to the bottom part BW is selected from the range of 1 to 5 °.

A pressure receiving member 29 is bonded to the upper surface of the lid 20. The press receiving member 29 prevents the upper portion of the lid 20 (that is, the top outer surface 24) from being deformed when the lid 20 is pressed against the main body 10 as described later, and the pressing force is applied to the lower end surface of the lid 20. 22 (that is, the joint surface with the main body 10) can be added uniformly.
Further, the press receiving member 29 can be attached with a snap lock C described later.

  The main body 10 or the lid 20 is provided with a positioning tool for determining the position of the lid 20 with respect to the main body 10. That is, the positioning tool is a means for fixing the relative position between the main body 10 and the lid 20. By the positioning tool, the shape of the polishing space S can be made into an octagonal prism shape. The structure of the positioning tool is not particularly limited as long as the position of the lid 20 with respect to the main body 10 can be determined. For example, a structure in which a pin or a convex portion is erected on the upper end surface 12 of the main body 10 or the lower end surface 22 of the lid 20 and a hole or a concave portion into which the pin or the convex portion can be fitted is provided on the other side, or other publicly known It is good also as a structure of. In this embodiment, as a positioning tool, a plurality of pins P are fixed along the upper end surface 12 of the main body 10, and a hole h into which the pin P is fitted is provided in the lower end surface 22 of the lid 20.

  The main body 10 and the lid 20 are fixed with a fixture for keeping the main body 10 and the lid 20 in close contact when the barrel tank 01 is set in the centrifugal barrel polishing machine. When the barrel tank 01 is set in the centrifugal barrel polishing machine, the structure is not particularly limited as long as the polishing space can be sealed to such an extent that the mass does not leak from the barrel tank 01. For example, a member such as a snap lock may be used, the main body 10 and the lid 20 may be connected by a rubber belt or the like, or other known configurations may be employed. In this embodiment, four snap locks C are fixed at regular intervals as a fixture.

(Manufacturing method of barrel tank)
Next, with reference to FIG. 2, the manufacturing method of the barrel tank of one Embodiment is demonstrated. FIG. 2 is a flowchart illustrating a barrel tank manufacturing method according to an embodiment. First, a method for manufacturing the main body 10 will be described.

Step S1: Step of preparing a forming jig In Step S1, a forming jig is prepared. The outer shape of the forming jig prepared in step S1 has a polygonal column shape, and has substantially the same shape as the concave portion 11, that is, substantially the same shape as the boundary of the polishing space S. In step S1, a rough shape of a forming jig is first formed by bending and welding a plate material or cutting from a columnar member. Next, the corner of the forming jig is cut into the same shape as the curvature required for the corner of the polishing space S. And the outer peripheral surface (a side peripheral surface and end surface) of a shaping | molding jig is ground so that it may become predetermined | prescribed surface roughness, and the member of the same shape as the recessed part 11 is obtained. Since the concave portion 11 is formed by this member, if the surface of this member has irregularities, irregularities are formed in the polishing space, which causes uneven polishing. In the present embodiment, a polygonal columnar member that is a cylindrical body having an octagonal column-shaped contour whose transverse cross section is an octagonal shape was prepared.
Although the forming jig may be composed of only the above-described members, in the present embodiment, the rotating shaft is fixed to the center of the end face (for example, an octagonal lower surface or upper surface in the case of an octagonal prism shape) to form a forming jig. The rotating shaft may be fixed to both end faces, or may be fixed only to one end face as long as the forming jig covered with the formed body can be stably rotated in a subsequent process.

Step S2: Step of coating raw rubber In step S2, the outer peripheral surface of the forming jig is covered with raw rubber. In step S2, raw rubber and a compounding agent (reinforcing agent, filler, softener, vulcanized material, etc.) are kneaded and rolled to obtain a raw rubber. This is coated on the polygonal columnar member so as to have a predetermined thickness. This thickness may be the same as the distance from the side inner surface 15 of the side SW to the sign sheet (that is, the predetermined distance t described above).
Next, the sign sheet 17 is attached to the outer surface (side surface side, bottom surface side) of the raw rubber. The sign sheet 17 may be attached only with the adhesive strength of raw rubber, or may be adhered with an adhesive in order to improve the adhesion to the resin.
Thereafter, the raw rubber is further coated so as to be slightly larger than the diameter and height of the main body.

Step S3: Step of obtaining a molded body In Step S3, a molded body is obtained by curing the coated raw rubber. The molded body is obtained by curing raw rubber so as to have the hardness of the main body 10. In this embodiment, the raw rubber is hardened by chemical reaction (vulcanization) by charging a molding jig coated with raw rubber into a vulcanizing furnace and heating it at a predetermined temperature.

Step S4: Step of adjusting the outer shape In step S4, the outer shape of the molded body obtained in step S3 is adjusted. In step S <b> 4, the shape of the side peripheral surface of the molded body is adjusted to be the shape of the side outer surface 13 of the main body 10. This adjustment may use a peripheral grinding device. The outer peripheral grinding apparatus includes a rotation motor, a gripping means connected to the rotation motor, and a grinding means. When the rotary motor is operated after gripping the rotating shaft of the forming jig with the gripping means, the forming jig and the molded body rotate about the rotating shaft. In this state, the grinding means is brought into contact with the side circumferential surface of the molded body, and the grinding means is moved in parallel with respect to the side circumferential surface of the molded body, whereby the side circumferential surface is ground. At this time, the side peripheral surface of the molded body is adjusted to the shape of the side outer surface 13 of the main body 10 by pressing the grinding means against the molded body so that the outer diameter of the molded body becomes the outer diameter of the main body 10. As will be described later, when it is desired to incline the outer peripheral surface of the side outer surface 13 at a predetermined angle with respect to the direction perpendicular to the bottom portion BW, the inclination can be formed in this step.
Next, it adjusts so that the shape of the upper end surface and lower end surface of a molded object may become the upper end surface 12 and bottom part BW of the main body 10, respectively. This adjustment can be performed by pressing the grinding means against both end faces of the molded body that rotates about the rotation axis as in the adjustment of the side peripheral surface.
The grinding means is only required to grind the compact, and can be appropriately selected from a rotating grindstone, a rotating brush, a cutting blade, and the like. In this embodiment, a rotating grindstone was used.

Step S5: Step of removing the forming jig Next, in Step S5, the molded body is removed from the forming jig. After removing the molding jig from the molded body, a projection 18 separately produced with the same material as the molded body is bonded to the upper end surface 12 of the molded body to obtain the main body 10.

Step S6; Finishing Step Next, in step S6, finishing is performed. In step S <b> 6, the deformation regulating member 19 is bonded to the upper end surface 12. In this embodiment, since the jig attachment member 19a is fixed to the deformation restriction member 19, the deformation restriction member 19 is applied by applying an adhesive to each of the deformation restriction member 19 and the jig attachment member 19a and bonding them to the main body 10. Can be bonded to the main body 10 more firmly.
Then, one of the pin P, the handle fixing jig H, and the snap lock C is attached.

  Next, a method for manufacturing the lid 20 will be described. The lid 20 may be manufactured in the same process as the main body 10 or may be manufactured using a mold.

The former manufacturing method will be described. First, the lid 20 is obtained by a process similar to the above-described processes S1 to S5. Since the manufacturing method of the lid 20 is substantially the same as the steps S1 to S5 described above, detailed description thereof is omitted. However, in the manufacturing method of the lid 20, a forming jig having a shape corresponding to the recess 21 is prepared in the step S1. Is done.
Next, in the “finishing step” of step 6, first, a hole h into which the pin P is fitted is opened in the lid 20, and then a pressure receiving member 29 is bonded to the top outer surface 24. Attach the other side of the snap lock C.

Next, the latter manufacturing method will be described. An upper mold in which a convex shape having the same shape as the concave portion 21 is formed on the surface of the flat plate and a lower mold in which a concave shape forming the outer shape is formed are manufactured.
Next, after covering the surface of the lower mold with raw rubber, the upper mold is placed and pressed against the lower mold. Thereby, the space formed by the lower mold and the upper mold is filled with raw rubber. In addition, when the upper die is pressed against the lower die, the raw rubber is cured by a chemical reaction (vulcanization).
After the raw rubber is hardened, the upper mold is released and the hard raw rubber is taken out to obtain the lid 20. Then, the press receiving member 29 is bonded to the top outer surface 24, and the other of the snap locks C is attached to the press receiving member 29.
The hole h into which the pin P is fitted may be opened after the cover 20 is obtained, or may be formed using a lower mold provided with a convex shape for forming the hole h.

  In the present embodiment, the lid 20 is manufactured using a mold. Since the lid 20 is smaller than the main body 10, even if a molding die is used, an increase in manufacturing cost is small.

  In the manufacturing method of the barrel tank of this embodiment, it is not necessary to provide a draft in the forming jig and the forming die in order to remove the raw rubber from the forming jig or the forming die in both the manufacture of the main body 10 and the lid 20. That is, the area of the cross section of the space (polishing space S) inside the barrel tank 01 can be made constant at an arbitrary position in the height direction (the extending direction of the side inner side surface 15). When the area of the cross section of the polishing space S decreases or expands toward the bottom inner surface 16, the workpiece tends to stay near the bottom inner surface 16. As a result, a phenomenon may occur in which the degree of finish differs for each workpiece. This phenomenon is particularly noticeable when polishing a small workpiece (for example, one side or a diameter of 2 mm or less).

(Barrel polishing method)
Next, the usage method of the barrel tank of this embodiment is demonstrated. In the following description, an example will be described in which a ceramic (dimension; 0.5 × 0.5 × 1.0 mm) made of a mixture of SiC and Al ₂ O ₃ is subjected to barrel polishing in a dry manner.

  First, a predetermined amount of workpieces and polishing media (manufactured by Shinto Kogyo Co., Ltd .; M1-F6T) that are masses are charged into the recesses 11 of the main body 10. And the lid | cover 20 is mounted in the main body 10 so that the pin P may fit in the hole h. Then, the polishing space is sealed with the snap lock C.

  Next, the barrel tank 01 is set in the centrifugal barrel polishing machine 30. Since the barrel tank 01 of the present embodiment has a cylindrical shape, it is difficult to handle when it is set in the centrifugal barrel polishing machine 30. Therefore, in this embodiment, the handle fixing jig H for detachably attaching a handle (not shown) for lifting the barrel tank 01 is fixed to the jig attaching member 19a at two locations at equal intervals.

  The centrifugal barrel polishing machine 30 used a so-called vertical type. Specifically, as shown in FIGS. 3A and 3B, a plurality of barrel tank cases 31 (four in this embodiment), a turret 32 (revolution disk) arranged in parallel to the ground, A drive mechanism 33 and a driven mechanism 34 are included. The plurality of barrel tank cases 31 are provided with a rotation shaft 31h at the center of the bottom surface, and fix the barrel tank 01 in a detachable manner. The turret 32 has a disk shape, and holes into which the rotation shaft 31h can be inserted are provided at equal intervals. A barrel tank case 31 is rotatably fixed to the turret 32. Further, a hole into which the revolution shaft 32a can be inserted is provided at the center of the plane of the turret 32, and the hole is fixed to the revolution shaft 32a fixed in a direction perpendicular to the ground. The drive mechanism 33 includes a motor 33a, a drive pulley 33b provided on the outer periphery of the turret, a motor pulley 33c fixed to the rotation shaft of the motor 33a, and a drive belt 33d spanning the drive pulley 33b and the motor pulley 33c. The drive mechanism 33 rotates the turret 32 around the revolution shaft 32a by the operation of the motor 33a. The driven mechanism 34 includes rotation pulleys 34a to 34d fixed to the four rotation shafts 31h, two driven pulleys 34e and 34f fixed to the revolution shaft 32a, two adjacent rotation pulleys, and one driven pulley, respectively. , And driven belts 34g and 34h, respectively. In FIG. 3B, a driven belt 34g is spanned between the rotating pulleys 34a and 34d and the driven pulley 34e, and a driven belt 34h is spanned between the rotating pulleys 34b and 34c and the driven pulley 34f. In order to reduce the play of the driven belts 34g and 34h, the slack prevention pulleys 34i and 34j are provided so as to contact the outer peripheral surfaces of the driven belts 34g and 34h. When the motor 33a is operated, the turret 32 rotates around the revolution shaft 32a. Since the rotation pulleys 34a to 34d rotate in the direction opposite to the turret 32 due to the rotation of the turret 32, the barrel tank case 31 rotates about its rotation shaft 31h. That is, the driven mechanism 34 is driven by the rotation of the turret 32 to individually rotate the plurality of barrel tanks 01 around the rotation shaft 31h.

  As shown in FIG. 4, the barrel tank case 31 includes a tray that holds the barrel tank 01, a barrel tank fixing portion, and a pair of guide members 31c that fix the barrel tank fixing portion. The tray includes a bottom plate 31a having a rotation shaft 31h fixed at the center of the lower surface, and a holding member 31b suspended from the upper surface of the bottom plate 31a. In the present embodiment, four shafts are used as the holding member 31b. The barrel tank 01 is accommodated in a virtual region formed by connecting adjacent shafts. Since each shaft is in contact with the side outer surface 13 of the main body 10 of the barrel tank, the position of the barrel tank 01 does not shift in the left-right direction in FIG. 4A during barrel polishing. That is, the holding member 31 b is disposed so as to surround the barrel tank 01 accommodated in the barrel tank case 31 from the outside, and restricts the movement of the barrel tank 01 with respect to the barrel tank case 31.

  In addition, when the side part outer surface 13 of the barrel tank 01 is inclined, the shape of the inner side of the holding member 31b (the side in contact with the side outer surface 13 of the barrel tank 01) is substantially the same as the inclination angle. When the above-described shaft is used as the holding member 31b, the shaft is fixed to the bottom plate 31a so as to be inclined at substantially the same angle as the inclination angle of the side outer surface 13 of the barrel tank 01. May be. The barrel tank 01 can be easily attached and detached by this inclination. Further, even if the barrel tank 01 rotates around the rotation axis 31h or turns around the revolution axis 32a by the operation of the centrifugal barrel polishing machine 30, the position with respect to the barrel tank case 31 may be shifted due to this inclination. Absent.

  The barrel tank fixing portion includes a plate-like support member 31d provided with a screw hole penetrating in the center, a screw member 31e screwed into the screw hole, and an upper end of the screw member 31e. A pressing handle 31f for rotating the screw member 31e and a pressing member 31g provided at the lower end of the screw member 31e for pressing the lid 20 toward the main body 10 are included.

  In the guide member 31c, a hole in which the support member 31d is loosely fitted is opened at an upper portion. This hole can guide the barrel tank fixing portion so as to be movable in the horizontal direction when the barrel tank 01 is attached and detached.

  After attaching the handle to the handle fixing jig H, the barrel tank 01 is inserted into the barrel tank case 31, and then the support member 31d is horizontally moved so that the pressing member 31g is positioned above the center of the pressing receiving member 29. . Then, the pressing member 31g is lowered by rotating the pressing handle 31f. The pressing member 31g has a flat bottom surface. After the bottom surface comes into contact with the top outer surface 24 of the lid 20 (in this embodiment, the pressure receiving member 29), the pressing handle 31f is further rotated to thereby rotate the lid 20 Is pressed by the main body 10 to completely seal the polishing space, and at the same time, the barrel tank 01 is fixed to the barrel tank case 31.

  After fixing the four barrel tanks 01 to the barrel tank case 31, the handle fixed to the barrel tank 01 is removed. Thereafter, when the centrifugal barrel polishing machine is operated, the turret 32 is rotated by the driving mechanism, so that the barrel tank 01 rotates (revolves) by the rotation of the turret 32. Further, as the barrel tank case 31 rotates with the rotation shaft 31h as the axis following the rotation of the turret 32, the barrel tank 01 also rotates (rotates) with the rotation axis 31h as the axis. The mass in the barrel tank 01 is fluidized by this rotation and the workpiece is polished.

  After operating the centrifugal barrel polishing machine 30 for a predetermined time, the operation is stopped. When the self-revolution of the barrel tank 01 is completely stopped, the barrel tank 01 is removed from the centrifugal barrel polisher 30 by a procedure reverse to the procedure for setting the barrel tank 01 in the centrifugal barrel polisher 30 described above. Then, after releasing the snap lock and removing the lid 20, the mass is taken out from the main body 10. Thereafter, the barrel polishing is completed by separating the workpiece, the polishing media, and the fine powder generated by the barrel polishing.

  When continuously barrel-polishing a new workpiece, after confirming that the sign sheet 17 is not exposed on the surface of the inner wall surface, a mass is inserted and barrel polishing is performed in the same procedure.

(Example of change)
When barrel-polishing a small amount of workpiece, the barrel tank may be polished by lowering the height of the barrel tank, stacking several stages and fixing it to the barrel tank case 31. In this case, when the lowermost barrel tank is deformed more than necessary, a metal outer frame may be provided on the side periphery of the barrel tank to prevent the deformation.

  The method of fixing the barrel tank 01 to the barrel tank case 31 is not limited to the above-described method. For example, as shown in FIG. 5, a cylindrical cam 31i in which a knitting mandrel 31j is fixed outside the center of both end faces may be used. The knitting mandrel 31j is rotatably fitted to the guide member 31c, and the cam 31i is pivoted about the knitting mandrel 31j by operating the lever 31k fixed to the cam 31i in the direction of the arrow in the figure. Let A shoulder is formed on the upper surface (or the pressure receiving member 29) of the lid 20, and the cam 31i is pressed against the shoulder with the knitting center amount of the cam 31i. Thereby, the barrel tank 01 is fixed to the barrel tank case 31.

  In the above embodiment, the centrifugal barrel polishing machine 30 is arranged so that the rotation shaft 31h and the revolution shaft 32a are perpendicular to the ground. However, in one embodiment, the centrifugal barrel polishing machine 30 uses the rotation shaft on the ground. May be disposed at a predetermined angle (for example, 30 ° to 70 °, or 40 ° to 50 °). Such a form can be realized by, for example, arranging the revolution shaft 32a at a predetermined angle and fixing the turret 32 rotatably thereto.

  An example of this type of centrifugal barrel polishing machine will be described with reference to FIG. In the following description, differences from the centrifugal barrel polishing machine 30 will be mainly described. The centrifugal barrel polishing machine 40 shown in FIG. 6 includes a disk-shaped turret 32 configured to be rotatable around a revolution shaft 32a. The plurality of barrel tank cases 31 are provided on the turret 32 via the rotation shaft 31h. The plurality of barrel tank cases 31 are configured such that the barrel tanks 01 accommodated therein can be individually rotated around the rotation shaft 31h.

  The centrifugal barrel polishing machine 40 has a first base 42 and a second base 41. The first base 42 has an inclined surface 42a (first inclined surface) inclined with respect to the horizontal plane. In one embodiment, the inclined surface 42a is disposed so as to be inclined at an angle of 30 degrees or more and 70 degrees or less with respect to the horizontal plane.

  The second base 41 has an inclined surface 41a that is inclined with respect to a horizontal plane (second inclined surface). The second base 41 is supported by the first base 42 such that the inclined surface 41 a is perpendicular to the inclined surface 42 a of the first base 42. A revolving shaft 32a arranged perpendicular to the inclined surface 41a is supported on the inclined surface 41a of the second base 41. That is, the revolution shaft 32a is disposed in parallel to the inclined surface 42a and is fixed in a state where it is inclined at an angle of 30 degrees to 70 degrees with respect to the horizontal plane, for example. Thereby, the turret 32 is pivotally supported by the revolution shaft 32a in a state inclined with respect to the horizontal plane. In addition, each of the rotation shafts 31h of the plurality of barrel tank cases 31 is arranged in a state parallel to the revolution shaft 32a. The first base 42 and the second base 41 are disposed such that the revolution shaft 32a is inclined with respect to the horizontal plane, and each of the plurality of rotation shafts 31h is disposed in parallel to the revolution shaft 32a. It functions as a part.

  With such a configuration, in the centrifugal barrel polishing machine 40, the turret 32 and the barrel tank case 31 are rotated by operating the motor 33a as in the above embodiment. As a result, the barrel tank 01 performs planetary motion in an inclined state. As a result, damage due to polishing such as chipping and cracking of the workpiece can be reduced. This effect is particularly remarkable when a hard and brittle material is polished as a workpiece.

  The barrel tank of this embodiment can be used regardless of the type and shape of the workpiece. For example, when the workpiece is a component such as a multilayer ceramic capacitor or inductor, not only those with a side of about 800 to 1,600 μm but also a very small size with a side of about 100 to 200 μm can be polished well. Can do. Naturally, even a workpiece having a size larger than that (for example, about 10 to 30 mm) can be satisfactorily polished.

  DESCRIPTION OF SYMBOLS 01 ... Barrel tank, 10 ... Main body, 11 ... Recessed part, 12 ... Upper end surface (joining surface), 13 ... Side outer side surface (main body), 14 ... Bottom outer side surface (main body), 15 ... Side inner side surface (main body), 16 ... bottom inner side surface (main body), 17 ... sign sheet, 18 ... convex portion, 19 ... deformation regulating member, 19a ... jig mounting member, 20 ... lid, 21 ... concave portion, 22 ... lower end surface (joining surface), 23 ... Side outer side surface (lid), 24 ... top outer side surface (lid), 25 ... side inner side surface (lid), 26 ... top inner side surface (lid), 29 ... press receiving member, 30, 40 ... centrifugal barrel polisher , 31 ... barrel tank case, 31a ... bottom plate, 31b ... holding member, 31c ... guide member, 31d ... support member, 31e ... screw member, 31f ... pressing handle, 31g ... pressing member, 31h ... rotating shaft, 31i ... cam, 31j ... Knitting mandrel, 31k ... Lever, 32 ... Turret (rotating circle) ), 32a ... revolving shaft, 33 ... drive mechanism, 33a ... motor, 33b ... drive pulley, 33c ... motor pulley, 33d ... drive belt, 34 ... driven mechanism, 34a, 34b, 34c, 34d ... rotating pulley, 34e, 34f ... Drive pulley, 34g, 34h ... driven belt, 34i, 34j ... slack prevention pulley, 41 ... second base, 42 ... first base, C ... snap lock, H ... handle mounting jig, h ... hole, P …pin.

Claims (10)

  A barrel tank for a centrifugal barrel polishing machine that includes a main body and a lid, and in which a polishing space into which a mass is charged is formed. At least one of the main body and the lid has a wear resistance performance as a whole. A barrel tank made up of a given rubber.   The barrel tank according to claim 1, wherein the polishing space has a polygonal column shape, and all corners are curved surfaces.   The barrel tank according to claim 1 or 2, wherein an area of a cross section of the polishing space is constant at an arbitrary position in a height direction.   On the joint surface of the main body and the lid, a convex portion for improving the sealing property of the polishing space is provided on either the main body or the lid, and the outer periphery of the convex portion is provided on the outer periphery of the convex portion. The barrel tank according to any one of claims 1 to 3, wherein a deformation regulating member that prevents deformation in a direction is fixed.   The barrel tank according to any one of claims 1 to 4, wherein a sign sheet for informing the wear amount of the rubber is embedded in the main body or the lid.   The barrel tank according to claim 5, wherein the sign sheet is a cloth made of nylon. A method for manufacturing a main body or a lid in a barrel tank according to any one of claims 1 to 6,
Preparing a forming jig including a member having the same shape as a recess forming the polishing space in the main body or the lid;
Coating raw rubber on the member;
Curing the coated raw rubber to obtain a molded body;
Adjusting the outer shape of the molded body;
Removing the molding jig from the adjusted molded body;
Manufacturing method. It is a manufacturing method of the main part or lid in the barrel tank according to claim 5 or 6,
Preparing a forming jig including a member having the same shape as a recess forming the polishing space in the main body or the lid;
Coating the member with raw rubber having a predetermined thickness;
After fixing the sign sheet on at least the side peripheral surface of the coated raw rubber, and further coating the raw rubber;
Curing the coated raw rubber to obtain a molded body;
Adjusting the outer shape of the molded body;
Removing the molding jig from the adjusted molded body;
Manufacturing method. A centrifugal barrel polishing machine equipped with a plurality of barrel tanks according to any one of claims 1 to 6,
A disc-shaped turret configured to be rotatable around a revolution axis;
A plurality of barrel tank cases provided on the turret via individual rotation shafts, wherein the barrel tanks housed therein are individually rotatable around the rotation shafts. When,
A base portion that arranges the revolution axis of the turret so as to be inclined with respect to a horizontal plane, and arranges each of the rotation axes of the plurality of barrel tank cases in parallel to the revolution axis;
A drive mechanism for rotating the turret around the revolution axis;
Following a rotation of the turret, and a driven mechanism for individually rotating the barrel tanks around the rotation axis;
Centrifugal barrel polishing machine equipped with. The base is
A first base having a first inclined surface inclined at an angle of 30 degrees or more and 70 degrees or less with respect to a horizontal plane;
A second inclined surface perpendicular to the first inclined surface, and the revolution axis in the second inclined surface so that the revolution axis is arranged perpendicular to the second inclined surface; A second base that supports
The centrifugal barrel polishing machine according to claim 9, comprising:

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