WO2012042681A1 - 研磨ユニットおよび研磨ユニットによる研磨方法 - Google Patents
研磨ユニットおよび研磨ユニットによる研磨方法 Download PDFInfo
- Publication number
- WO2012042681A1 WO2012042681A1 PCT/JP2010/073010 JP2010073010W WO2012042681A1 WO 2012042681 A1 WO2012042681 A1 WO 2012042681A1 JP 2010073010 W JP2010073010 W JP 2010073010W WO 2012042681 A1 WO2012042681 A1 WO 2012042681A1
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- WIPO (PCT)
- Prior art keywords
- barrel tank
- lid
- fixing member
- barrel
- polishing
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/104—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work involving a rotating bowl, in which a ring zone of abrasive powder is formed by centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
Definitions
- the present invention relates to a polishing unit used in a centrifugal barrel polishing apparatus and a polishing method using a centrifugal barrel polishing apparatus equipped with the polishing unit.
- FIG. 4 shows an example of a conventional polishing unit.
- the conventional polishing unit 100 includes a barrel tank 110 composed of a box-shaped main body 111 and a lid 112, and a barrel tank case 120 rotatably attached to a turret (revolution disk) not shown.
- the operator manually operates the lever 122 of the fixing member 121 provided in the barrel tank case 120 to rotate the eccentric rod 123, thereby
- the lid 112 is brought into contact with a shoulder 113 formed on the upper surface of the lid 112, and the lid 112 is strongly pressed against the main body 111 and fixed.
- the barrel tank 110 does not include a means for fixing the lid 112 to the main body 111. Therefore, in order to generate a sufficient pressing force with the eccentric amount of the cam 124, the cam 124 is provided. And the shoulder 113 are required to have high accuracy. Accordingly, if the main body 111 and the lid 112 are not aligned with each other, the clearance may be out of a predetermined range. Therefore, the main body 111 and the lid 112 are not compatible with other lids and the main body, and the barrel tank 110 is attached and detached. There is a problem that cannot be performed efficiently.
- the pressing force is controlled in a constant direction with a constant value.
- the rubber forming the lining may be removed by heating, but if the main body 111 or the lid 112 or both of them are thermally strained at this time Since the clearance between the cam 124 and the shoulder 113 changes, the clearance needs to be corrected, and in some cases, at least one of the main body 111 and the lid 112 must be replaced.
- the barrel tank 110 needs to be attached and detached for maintenance (for example, replacement of the barrel tank due to wear of the rubber lining), and for loading and unloading the workpiece and the polishing media with respect to the barrel tank 110. There is a need for weight reduction.
- an object of the present invention is to provide compatibility between the main body and the lid of the barrel tank with respect to other lids and the main body, and to reliably fix the lid to the barrel tank main body and the barrel tank to the barrel tank case. It is possible to provide a polishing unit that is excellent in maintainability and to provide a polishing method using the polishing unit.
- a polishing unit for use in a centrifugal barrel polishing apparatus which includes a main body portion for inserting a member to be polished and a medium, and sealing the main body portion.
- a barrel tank having a lid to A barrel tank case having a tray for holding the barrel tank and a barrel tank fixing member for fixing the barrel tank to the tray; and a barrel tank case attached to a revolution disk of a centrifugal barrel polishing apparatus.
- the lid can be pressed vertically downward by the pressing member, and the lid can be fixed to the main body portion by an appropriate pressing force. Therefore, the barrel tank can be mounted regardless of the clearance between the barrel tank fixing member and the lid. It can be securely fixed to the barrel tank case.
- the pressing member corresponds to the outer shape of the lid, it is possible to prevent the pressing member and the lid from rattling and securely fix the lid to the main body. Since the lid can be fixed to the main body portion in the same pressing state, it is not necessary to fix the combination of the main body portion and the lid, and a polishing unit compatible with the barrel tank main body and the lid can be obtained.
- the barrel tank fixing member is inserted into a pair of guide portions that guide the barrel tank fixing member, and is configured to be movable in a horizontal direction when the barrel tank is attached and detached.
- a positioning member that restricts the movement of the barrel tank fixing member with respect to the guide portion when the member is mounted at the fixed position of the barrel tank may be included.
- the barrel tank fixing member is inserted into the pair of guide portions that guide the barrel tank fixing member and is configured to be movable in the horizontal direction when the barrel tank is attached or detached.
- the fixing member can be prevented from interfering with the attachment / detachment of the barrel tank, and the barrel tank can be attached / detached easily.
- the movement of the barrel tank fixing member can be limited by the positioning member with reference to the guide portion, so the barrel tank is easily arranged at the fixed position. To prevent it from moving.
- the positioning member includes a convex member that restricts movement of the barrel tank fixing member in the mounting direction when the barrel tank fixing member is mounted at a fixed position of the barrel tank, and an outer side from the inside of the barrel tank fixing member.
- a projecting member biased in a projecting direction and is configured to be retractable inside the barrel tank fixing member, and protrudes when the barrel tank fixing member is mounted at a fixed position of the barrel tank.
- a protruding member that restricts movement of the barrel tank fixing member in the releasing direction.
- the movement of the barrel tank fixing member in the mounting direction can be limited by the convex member, and the movement in the release direction can be limited by the protruding member.
- a barrel tank can be easily arrange
- the polishing unit of the present invention includes an index plunger capable of positioning to a predetermined position, a lid pressing member that presses the lid against the main body portion via the index plunger by operating the index plunger, It is preferable to further include a lid fixing member for fixing the lid to the main body.
- the barrel tank is provided with a lid fixing member that fixes the lid to the main body by operating the index plunger, it can be easily and surely fixed. There is no need to consider this, and the main body and the lid can be made compatible with other lids and the main body.
- the welded portion of the barrel tank main body is formed by a spot welding method.
- the barrel tank body has been formed by welding a metal plate that forms a side surface to a metal plate bent into a columnar shape by an arc welding method or the like.
- a thick plate having a thickness of 3 mm or more is used.
- the welded portion of the barrel tank main body is formed by the spot welding method as described above, there is less risk of the metal plate being melted. Therefore, it is possible to produce the barrel tank main body using a thin metal plate of about 1 mm. it can.
- the barrel tank can be reduced in weight, the burden on the operator can be reduced, the number of work steps for producing the barrel tank can be reduced, and the cost of the members can be reduced. Further, the weight of the barrel tank is reduced, so that the load on the driving source for rotating and revolving the barrel tank is reduced, thereby reducing the energy consumption of the barrel polishing apparatus and degrading the barrel polishing apparatus. Can be suppressed.
- the media to be polished by the centrifugal barrel polishing apparatus including any of the above-described polishing units is formed by dispersing abrasive grains in a resin serving as a base, and the abrasive grains are applied to the media. More preferably, the content is 30 to 70% by mass.
- the weight of the medium is preferably 0.01 to 50 g or the specific gravity is 1.7 to 2.3.
- the medium is preferably formed by a straight body portion having a circular cross section and having the same continuous cross sectional area, and a reduced diameter portion continuously reducing the diameter from the cross sectional area. Further, it is more preferable that the acute corner portion of the medium is rounded.
- the ratio of the diameter of the circular cross section to the length of the cross section perpendicular to the circular cross section is preferably 1: 0.5 to 1: 1.5.
- polishing using a resin-based medium helps one of the objects of the present invention, “weight reduction”. However, if the resin content is low, sufficient polishing power cannot be obtained.
- the content of abrasive grains contained in the media is preferably set to 30 to 70%. Further, the media preferably has a weight of 0.01 to 50 g or a specific gravity of 1.7 to 2.3.
- the centrifugal barrel polishing apparatus including any of the above-described polishing units has a high grinding power because the barrel tank rotates and revolves during polishing.
- the amount of media worn compared to other types of barrel polishing apparatuses is high. Is big.
- the collision energy is dispersed when colliding with the work and barrel tank that cause media wear. It is possible to prevent so-called partial wear, cracks and chipping, etc., in which only portions are worn intensively. Further, by rounding the acute angle portion, it is possible to prevent cracks and chips from starting.
- the shape that has a sufficient polishing force and prevents the above-described piece edge, crack, and chipping is the circular cross section and the above-described shape.
- the ratio of the lengths of the cross sections orthogonal to the cross section is preferably set in the range of 1: 0.5 to 1: 1.5.
- FIG. 1A is a perspective view of a barrel tank
- FIG. 1B is a side perspective view.
- 2A is a perspective view of the polishing unit
- FIG. 2B is an enlarged cross-sectional view taken along the line AA in FIG. 2A.
- 3 (A) to 3 (D) are explanatory views showing the structure of the lid fixing member in the barrel tank of the polishing unit according to the present invention and the method for fixing the lid to the main body by the lid fixing member. It is a perspective view which shows the conventional grinding
- 5A is a front view
- FIG. 5B is a view (bottom view) taken along line AA in FIG. 5A.
- the barrel tank 10 is formed in a cylindrical shape having a polygonal or circular longitudinal cross section, and has a main body portion 11 having an opening portion 11a for loading a workpiece and a medium at the upper portion, and an opening. And a lid 12 for sealing the portion 11a.
- the barrel tank 10 has an octagonal longitudinal cross-sectional shape as an example.
- a lining 13 made of a wear-resistant rubber member for preventing wear on each surface is formed on the inner surface of the main body 11 and the lower surface of the lid 12 as in the conventional polishing unit.
- the lid fixing members 14 for fixing the lid 12 to the main body 11 are provided at four locations on the lid 12 corresponding to the fixing positions (holes 11 b) outside the opening 11 a of the main body 11.
- a pin, a ball, or an equivalent thereof protrudes.
- 12 includes an index plunger 14a that positions 12 and a lid pressing member 14b that can press the lid 12 against the main body 11 via the index plunger 14a by operating the index plunger 14a.
- FIG. 1 shows a state in which the lid 12 is fixed to the main body 11 by the lid fixing member 14.
- FIG. 3 shows the structure of the lid fixing member 14, the structure for fixing the lid 12 to the main body 11 by the lid fixing member 14, and the fixing method.
- the upper half of FIG. 3A and FIGS. 3B to 3D are perspective views of the fixing structure as viewed from the side, and the lower half of FIG. It is the top view seen from.
- the lid pressing member 14b is configured to be able to rotate a cylindrical portion that penetrates the lid 12 and can be inserted into the hole 11b of the main body 11 by operating the index plunger 14a.
- An inclined groove 14c is formed in the cylindrical portion inserted into the hole 11b, and a fixing pin 11c for guiding the inclined groove 14c in the vertical direction is provided inside the hole 11b.
- the lid pressing member 14b When the lid pressing member 14b is inserted into the hole 11b of the main body 11 as shown in FIG. 3 (B), and the index plunger 14a is moved in the direction of arrow L in FIG. 1 as shown in FIG. 3 (C).
- the lid pressing member 14b rotates, the inclined groove 14c is guided by the fixing pin 11c, and the index plunger 14a moves downward.
- the index plunger 14a reaches a predetermined position, the pin protrudes downward to position the lid pressing member 14b at the predetermined rotation position, and presses the upper surface of the lid 12 as shown in FIG.
- the lid 12 can be fixed to the main body 11.
- the index plunger 14a is positioned at a predetermined position (the position of one end L of the arrow in FIG.
- the displacement of the lid 12 pressing the main body portion 11 via the index plunger 14a by the lid pressing member 14b is constant. (That is, the pressing force is constant).
- the index plunger 14 a is rotated in the O direction in FIG. 2, the pressure on the lid 12 is released, so that the lid 12 can be removed from the main body 11.
- the barrel tank 10 includes the lid fixing member 14 that fixes the lid 12 to the main body portion 11 and can be easily and surely fixed, the consistency between the main body portion 11 and the lid 12 is considered.
- the main body 11 and the lid 12 may be compatible with other lids and the main body.
- the position and the number of the lid fixing members 14 can be appropriately set depending on the size of the barrel tank 10 and the like.
- the barrel tank case 20 includes a tray 21 on which the barrel tank 10 is placed and held, a barrel tank fixing member 22 that fixes the barrel tank 10 to the tray 21, and a barrel tank 10 being attached and detached.
- the barrel tank fixing member 22 is provided with a pair of guide portions 23 that guide the barrel tank fixing member 22 so as to be movable in the horizontal direction (in this embodiment, the rotation axis direction).
- the barrel tank case 20 is attached to a turret (revolution disk) of a centrifugal barrel device (not shown) through a rotating shaft 24 so as to be rotatable.
- the guide part 23 is provided on both side surfaces in the rotation axis direction, and when the barrel tank fixing member 22 is inserted, the guide part 23 is disposed between the inner peripheral surface of the guide part 23 and the outer peripheral surface of the barrel tank fixing member 22. It is formed in an annular shape so that a gap that does not hinder the movement of the tank fixing member 22 is formed.
- the barrel tank fixing member 22 is disposed so as to be opposed to the tray 21 so that the barrel tank 10 can be pressed vertically downward, and the pressing member 22a for pressing the barrel tank 10 and the barrel tank fixing member 22 are mounted.
- the pressing member 22a is configured to be able to press the lid 12 vertically downward by adjusting the vertical position with, for example, a tightening bolt 22b.
- the contact portion 22 e that presses the lid 12 corresponds to the outer shape of the upper surface of the lid 12.
- the convex member 22c is formed in a convex shape on the upper surface of the barrel tank fixing member 22 so as not to pass through the guide portion 23.
- the mounting direction (FIG. 2 ( A) is arranged at a position that restricts movement in the direction of arrow M).
- the projecting member 22d is formed in a plate shape in the present embodiment, is configured to be retractable inside the barrel tank fixing member 22, and protrudes outward from the interior of the barrel tank fixing member 22 (FIG. 2A). ) Is biased by a spring or the like.
- the protruding member 22d protrudes when the barrel tank fixing member 22 is mounted, and is formed so as to limit the movement of the barrel tank fixing member 22 in the release direction (the direction of arrow N in FIG. 2A).
- the movement restriction can be easily released and moved by storing the protruding member 22 d in the barrel tank fixing member 22 against the bias.
- the guide portion 23 on the mounting direction side may be formed in a cup shape that opens in the release direction instead of the annular shape described above. Also in this case, the movement of the barrel tank fixing member 22 in the mounting direction can be restricted, and the same effect as the convex member 22c is achieved.
- a work and a medium are put into the main body 11 of the barrel tank 10, the lid 12 is placed in the opening 11 a of the main body 11, the index plunger 14 a is operated, and the lid 12 is attached to the main body by the lid fixing member 14. 11 is fixed.
- the barrel tank fixing member 22 is moved along the guide portion 23 in the release direction (the direction of arrow N in FIG. 2A). .
- the barrel tank 10 is placed on the tray 21, and the barrel tank fixing member 22 is mounted along the guide portion 23 in the mounting direction (in the direction of arrow M in FIG. 2A) in which the barrel tank fixing member 22 is mounted at the fixed position of the barrel tank 10.
- the protruding member 22d is formed with an inclined portion 22f whose width becomes narrower in the mounting direction M
- the guide member 23 causes the protruding member 22d to be 2 (A) is pushed in the arrow Y direction.
- the protruding member 22d passes through the guide portion 23, it protrudes again, and the barrel tank fixing member 22 is positioned at a predetermined position.
- the pressing member 22 a is lowered by the fastening bolt 22 b, the lid 12 is pressed vertically downward and pressed against the main body 11, and the barrel tank 10 is fixed to the barrel tank case 20.
- the lid 12 can be pressed vertically downward by the pressing member 22a and the lid 12 can be fixed to the main body 11 by an appropriate pressing force, the clearance between the barrel tank fixing member 22 and the lid 12 is not affected.
- the barrel tank 10 can be securely fixed to the barrel tank case 20.
- the contact portion 22e of the pressing member 22a corresponds to the outer shape of the lid 12, the lid 12 is securely fixed to the main body portion 11 by preventing the pressing member 22a and the lid 12 from rattling. be able to.
- the lid 12 can be fixed to the main body portion 11 in the same pressing state, there is no need to fix the combination of the main body portion 11 and the lid 12, and the main body portion 11 and the lid 12 are in contact with other lids and the main body portion.
- the polishing unit 1 having compatibility can be obtained.
- the main body 11 of the barrel tank 10 used in the present embodiment is manufactured by welding a metal plate forming a side surface to a metal plate bent into a columnar shape by a spot welding method.
- the barrel tank body has been formed by welding all around by arc welding method, etc.
- the metal plate should be thicker than 3mm. Has been.
- the main body portion 11 is produced using a thin metal plate of about 1 mm. can do.
- the barrel tank 10 can be reduced in weight, and the burden on the operator can be reduced, and the number of work steps involved in the production and the cost of the members can be reduced. Furthermore, by reducing the weight, the load on the drive source (for example, drive motor) for rotating and revolving the barrel tank 10 is reduced, so that energy saving of the barrel polishing apparatus 1 can be achieved. Deterioration of the barrel polishing apparatus 1 can be suppressed.
- the conventional barrel tank when the lining is replaced, a new lining may be formed after the rubber forming the lining is removed by heating. However, in such a replacement method, the cost of newly forming the lining 13 and the manufacturing cost of the polishing barrel tank 10 are not significantly different. Therefore, the new barrel tank 10 may be used without replacing the lining 13.
- the weight is light.
- a medium is used in which a resin is used as a base and abrasive grains are dispersed in the resin.
- the abrasive content is preferably 30 to 70% by mass with respect to the media. Is preferably contained in an amount of 40 to 60%.
- the weight of the medium is preferably 0.01 to 50 g, desirably 0.02 to 40 g, or the specific gravity of the medium is 1.6 to 2.4, desirably 1.8 to 2.2. . If the weight or specific gravity is smaller than the above range, the barrel flow in the barrel tank 10 is insufficient and sufficient polishing force cannot be obtained. If the weight or specific gravity is larger than the above range, the workpiece and the media are not polished during polishing. The impact causes a dent on the surface of the workpiece.
- the resin is a thermoplastic resin (eg, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.) or thermosetting resin (eg, phenol resin, unsaturated polyester resin, polyurethane resin, epoxy resin, urea). Resins, etc.) can be suitably used.
- abrasive grains known materials (for example, alumina, silica, silicon carbide, iron oxide, boron oxide, zircon, chromium oxide, diamond, gold sand, and powders thereof, or moldings made from these materials) are used. It can be used suitably.
- the grain size of the abrasive grains can be appropriately selected according to the type of abrasive grains, the size of the media, the properties of the workpiece, and the purpose of polishing.
- the shape of the media may be spherical, columnar (cylinder, polygonal column), conical, etc.
- a straight cylinder having a circular cross section and the same continuous cross sectional area.
- a shape formed by a reduced diameter portion that continuously decreases in diameter from the cross-sectional area. It has a stronger polishing force than spherical media, and as the polishing progresses like a cone shape or a column shape, the media does not shrink, and wears out while maintaining the same shape. Can be maintained for hours.
- the acute angle portion serves as a base point. Since chipping occurs to cause breakage or chipping of the media, or scratches or irregularities (indentations) are formed on the workpiece, media with rounded edges are used. The rounding may be performed after forming a medium having an acute angle portion, or may be formed so as not to have an acute angle portion when the medium is formed.
- the size of the medium is appropriately selected depending on the properties of the workpiece, the purpose of polishing, the size of the barrel tank, etc., and the diameter of the circular cross section is generally selected from 1 to 50 mm, preferably 2 to 40 mm. preferable.
- the ratio D: L of the diameter D of the circular cross section and the length L of the cross section perpendicular to the circular cross section is 1: 0.5 to 1: 1.5. Is preferred. If L is smaller than D, sufficient polishing force cannot be obtained, and if L is large, the media is reduced during polishing.
- centrifugal barrel polishing apparatus using the polishing unit of the present invention may be either a dry centrifugal barrel polishing apparatus or a wet centrifugal barrel polishing apparatus.
- the lid 12 can be pressed vertically downward by the pressing member 22a, and the lid 12 can be fixed to the main body 11 by an appropriate pressing force.
- the barrel tank 10 can be reliably fixed to the barrel tank case 20 irrespective of the clearance between the lid 12 and the lid 12. Further, since the contact portion 22e of the pressing member 22a corresponds to the outer shape of the lid 12, the lid 12 is securely fixed to the main body portion 11 by preventing the pressing member 22a and the lid 12 from rattling. be able to.
- the lid 12 can be fixed to the main body portion 11 in the same pressing state, it is not necessary to limit the combination of the main body portion 11 and the lid 12 to one-to-one, and the main body portion 11 and the lid 12 are the other lid and main body portion. It is possible to make the polishing unit 1 compatible with the above.
- the barrel tank fixing member 22 Since the barrel tank fixing member 22 is configured to be movable in the horizontal direction when the barrel tank 10 is attached / detached, the barrel tank fixing member 22 can be prevented from hindering the attachment / detachment of the barrel tank 10.
- the barrel tank 10 can be easily attached and detached. And, when the barrel tank fixing member 22 is mounted at the fixing position of the barrel tank 10, the movement of the barrel tank fixing member 22 can be limited based on the guide portion 23 by the convex member 22c and the protruding member 22d.
- the barrel tank 10 can be easily arranged at a fixed position so as not to move.
- the barrel tank 10 includes the lid fixing member 14 that fixes the lid 12 to the main body 11 by operating the index plunger 14a, the main body 11 and the lid can be easily fixed. Therefore, the main body 11 and the lid 12 can be compatible with other lids and the main body.
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Abstract
Description
本発明は、遠心バレル研磨装置に用いる研磨ユニットおよび該研磨ユニットを搭載した遠心バレル研磨装置による研磨方法に関する。
このような遠心バレル研磨装置に用いられる従来の研磨ユニットは、例えば、特許文献1に開示されている。
図4に従来の研磨ユニット一例を示す。この従来の研磨ユニット100は、箱型の本体111と蓋112とからなるバレル槽110と、図示されていないタレット(公転円盤)に回転可能に取り付けられたバレル槽ケース120とを備えている。バレル槽110をバレル槽ケース120に固定するには、バレル槽ケース120に設けられた固定部材121のレバ-122を作業員が手動操作して、偏心棒123を回転させることにより、カム124を蓋112の上面に形成されたショルダ113に当接させて、蓋112を本体111に強く押し付けて固定する。
また、バレル槽110内面のゴム製ライニングを交換する際には、ライニングを形成するゴムを加熱して除去する場合があるが、このとき本体111または蓋112、またはその両方に熱歪みが生じると、カム124とショルダ113との間のクリアランスが変化してしまうため、クリアランスの修正を要し、場合によっては本体111および蓋112の少なくとも一方を交換しなければならない。
また、前述の通りバレル槽110は、メンテナンス(例えば、前記ゴム製ライニングの摩耗によるバレル槽の交換)や、ワークおよび研磨メディアを該バレル槽110に対して出し入れするために着脱する必要があるので、軽量化が求められている。
前記バレル槽を保持するトレイと、前記バレル槽を前記トレイに固定するバレル槽固定部材とを有し、遠心バレル研磨装置の公転円盤に取り付けられたバレル槽ケースとを備え、前記バレル槽固定部材は、前記蓋の外形形状に対応し、前記蓋を鉛直下方に押圧可能に構成されている押圧部材を有する。
また、押圧部材は蓋の外形形状に対応しているため、押圧部材と蓋とのがたつきが生じることを防いで蓋を本体部に確実に固定することができる。
蓋を本体部に同じ押圧状態で固定することができるので、本体部と蓋との組み合わせを固定する必要がなく、バレル槽本体と蓋とに互換性がある研磨ユニットとすることができる。
そして、バレル槽固定部材をバレル槽の固定位置に装着するときに、位置決め部材によりガイド部を基準にしてバレル槽固定部材の移動を制限することができるので、バレル槽を容易に固定位置に配置して移動しないようにすることができる。
突出部材は位置決め部材の内部から外方に突出する向きに付勢されているので、バレル槽固定部材をバレル槽の固定位置に装着するだけで自動的に突出して解除方向への移動を制限することができる。
蓋固定部材14は、本体部11に取り付けるべき蓋12が、本体部11に対して所定の位置に整合した際に、ピンや球またはそれらの均等物(図示せず)が突出することで蓋12の位置決めを行うインデックスプランジャ14aと、インデックスプランジャ14aを操作することによりインデックスプランジャ14aを介して蓋12を本体部11に対して押圧することができる蓋押圧部材14bと、を有している。図1は、蓋固定部材14により蓋12が本体部11に固定された状態を示している。
そして、インデックスプランジャ14aが所定の位置に到達すると、ピンが下方に突出して蓋押圧部材14bが所定の回動位置に位置決めされ、図3(D)に示すように、蓋12の上面を押圧して蓋12を本体部11に固定することができる。ここで、インデックスプランジャ14aが所定の位置(図1の矢印の一端L位置)で位置決めされるため、蓋押圧部材14bによりインデックスプランジャ14aを介して蓋12が本体部11を押圧する変位を一定量とする(即ち、押圧力を一定とする)ことができる。
インデックスプランジャ14aを図2のO方向に回動させると、蓋12に対する押圧が解除されるため、蓋12を本体部11から取り外すことができる。
突出部材22dはバレル槽固定部材22を装着するときに突出して、バレル槽固定部材22の解除方向(図2(A)の矢印N方向)への移動を制限するように形成されている。
バレル槽固定部材22を解除するときには、突出部材22dを付勢に対抗してバレル槽固定部材22の内部に格納することで、簡単に移動の制限を解除し、移動させることができる。
このように、押圧部材22aにより蓋12を鉛直下方に押圧し、適切な押圧力により蓋12を本体部11に固定することができるので、バレル槽固定部材22と蓋12とのクリアランスによらずバレル槽10をバレル槽ケース20に確実に固定することができる。
また、押圧部材22aの接触部22eは蓋12の外形形状に対応しているため、押圧部材22aと蓋12とのがたつきが生じることを防いで蓋12を本体部11に確実に固定することができる。
蓋12を本体部11に同じ押圧状態で固定することができるので、本体部11と蓋12との組み合わせを固定する必要がなく、本体部11及び蓋12が他の蓋及び本体部に対して互換性を有する研磨ユニット1とすることができる。
一方、本実施形態のように、本体部11の溶接部をスポット溶接法により形成することにより、金属板が溶損するおそれが少なくなるため、1mm程度の薄い金属板を用いて本体部11を作製することができる。これにより、バレル槽10を軽量化することができ、作業者の負担が軽減されるとともに、作製に係る作業工数削減及び部材のコストダウンが可能となる。さらに、前記軽量化したことにより、該バレル槽10の自転および公転運動を行うための駆動源(例えば駆動モータ)への負荷が軽減されることにより、バレル研磨装置1の省エネルギ化が図れるとともにバレル研磨装置1の劣化を抑えることができる。
従来のバレル槽では、そのライニングを交換する際には、ライニングを形成するゴムを加熱して除去した後、新たなライニングを形成する場合がある。しかしながら、このような交換方法では、ライニング13を新たに形成するコストと研磨バレル槽10の製造コストとが大差なくなるため、ライニング13を交換することなく、新しいバレル槽10を使用してもよい。
(1)本発明の研磨ユニット1によれば、押圧部材22aにより蓋12を鉛直下方に押圧し、適切な押圧力により蓋12を本体部11に固定することができるので、バレル槽固定部材22と蓋12とのクリアランスによらずバレル槽10をバレル槽ケース20に確実に固定することができる。
また、押圧部材22aの接触部22eは蓋12の外形形状に対応しているため、押圧部材22aと蓋12とのがたつきが生じることを防いで蓋12を本体部11に確実に固定することができる。
蓋12を本体部11に同じ押圧状態で固定することができるので、本体部11と蓋12との組み合わせを一対一に限定する必要がなく、本体部11及び蓋12が他の蓋及び本体部との互換性を有する研磨ユニット1とすることができる。
そして、バレル槽固定部材22をバレル槽10の固定位置に装着するときに、凸部材22c及び突出部材22dによりガイド部23を基準にしてバレル槽固定部材22の移動を制限することができるので、バレル槽10を容易に固定位置に配置して移動しないようにすることができる。
本発明の幾つかの実施例について説明した。それでもなお、本発明の要旨及び目的から逸脱することなく、様々な変更例をなし得ることを理解されたい。
10…バレル槽
11…本体部
11a…開口部
11b…孔部
11c…固定ピン
12…蓋
14…蓋固定部材
14a…インデックスプランジャ
14b…蓋押圧部材
14c…傾斜溝
20…バレル槽ケース
21…トレイ
22…バレル槽固定部材
22a…押圧部材
22b…締め付けボルト
22c…凸部材
22d…突出部材
22e…接触部
23…ガイド部
24…回転軸
Claims (12)
- 遠心バレル研磨装置に用いる研磨ユニットであって、
被研磨部材及びメディアを投入する本体部と、この本体部を封止する蓋とを有するバレル槽と、
前記バレル槽を保持するトレイと、前記バレル槽を前記トレイに固定するバレル槽固定部材とを有し、遠心バレル研磨装置の公転円盤に取り付けられたバレル槽ケースとを備え、
前記バレル槽固定部材は、前記蓋の外形形状に対応し、前記蓋を鉛直下方に押圧可能に構成された押圧部材を有することを特徴とする研磨ユニット。 - 前記バレル槽固定部材は、
前記バレル槽固定部材を案内する一対のガイド部に挿通され、前記バレル槽を着脱するときに水平方向に移動可能に構成されていると共に、
前記バレル槽固定部材を前記バレル槽の固定位置に装着するときに前記ガイド部を基準にして前記バレル槽固定部材の移動を制限する位置決め部材を含むことを特徴とする請求項1に記載の研磨ユニット。 - 前記位置決め部材は、
前記バレル槽固定部材を前記バレル槽の前記固定位置に装着するときに前記バレル槽固定部材の装着方向への移動を制限する凸部材と、
前記バレル槽固定部材の内部から外方に突出する向きに付勢された突出部材であって、前記バレル槽固定部材の内部に格納可能に構成されており、前記バレル槽固定部材を前記バレル槽の固定位置に装着するときに突出して、前記バレル槽固定部材の解除方向への移動を制限する突出部材とを含むことを特徴とする請求項2に記載の研磨ユニット。 - 所定の位置への位置決めが可能なインデックスプランジャと、前記インデックスプランジャを操作することにより前記インデックスプランジャを介して前記蓋を前記本体部に対して押圧する蓋押圧部材と、前記蓋を前記本体部に固定するための蓋固定部材とを備えたことを特徴とする請求項1ないし請求項3のいずれか1つに記載の研磨ユニット。
- 前記バレル槽本体部の溶接部がスポット溶接法により形成されたことを特徴とする請求項1ないし請求項4のいずれか1つに記載の研磨ユニット。
- 請求項1ないし請求項5のいずれか1つに記載の研磨ユニットを備える遠心バレル研磨装置による研磨方法において、
前記メディアは、基体となる樹脂に砥粒が分散されて形成していることを特徴とする研磨方法。 - 前記砥粒は、前記メディアの30~70質量%含有されていることを特徴とする請求項6に記載の研磨方法。
- 前記メディアの重量が0.01~50gであることを特徴とする請求項6または請求項7に記載の研磨方法
- 前記メディアの比重が1.6~2.4であることを特徴とする請求項6または請求項7に記載の研磨方法
- 前記メディアは、円形断面をもち、かつ連続した同一の断面積を持つ直胴部と、
前記断面積より連続的に縮径する縮径部と、
により形成されていることを特徴とする請求項6ないし請求項9のいずれか1つに記載の研磨方法。 - 前記メディアは、鋭角部が丸め加工されていることを特徴とする請求項10に記載の研磨方法。
- 前記円形断面の直径と、該円形断面に直交する断面の長さとの比が1:0.5~1:1.5であることを特徴とする請求項10または請求項11に記載の研磨方法。
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