PH12013502028B1 - Abrasive medium for barrel polishing - Google Patents
Abrasive medium for barrel polishing Download PDFInfo
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- PH12013502028B1 PH12013502028B1 PH12013502028A PH12013502028A PH12013502028B1 PH 12013502028 B1 PH12013502028 B1 PH 12013502028B1 PH 12013502028 A PH12013502028 A PH 12013502028A PH 12013502028 A PH12013502028 A PH 12013502028A PH 12013502028 B1 PH12013502028 B1 PH 12013502028B1
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- Philippines
- Prior art keywords
- polishing
- body part
- medium
- media
- works
- Prior art date
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 135
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 12
- 238000005299 abrasion Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 6
- 239000006061 abrasive grain Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 2
- 238000007517 polishing process Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 19
- 230000003746 surface roughness Effects 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 238000011179 visual inspection Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1409—Abrasive particles per se
-
- 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
- B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
Abstract
To provide an abrasive medium for barrel polishing which does not cause blow marks on a target object (workpiece) after making contact with the workpiece and does not vary largely in a contact state with the workpiece according to the time of a polishing process. The abrasive medium is formed of a mixture prepared by dispersing particles in a resin base. The abrasive medium has a granular shape formed by: a cylindrical linear body part having an end surface as a bottom surface; and a diameter reduction part extending from the other end surface of the linear body part with a continuously reducing diameter, wherein an intersection between the bottom surface and a lateral surface of the linear body part, a boundary between the linear body part and the diameter reduction part, a vertical section of the diameter reduction part including the apex of the diameter reduction part are convex.
Description
ABRASIVE MEDIUM FOR BARREL POLISHING
/s
Field of the invention Ap “
This invention is directed to polishing mediums for Bane polising thats supplied ) together with workpieces to barrel polishing equipment to remou bufrs a 4 to render a smooth finishing, etc., to the workpieces.
Conventionally barrel polishing has been used to treat the workpiece(s) (hereafter, “works” or “work™) in removing scales, deburring, removing films, removing burrs, removing tool marks, removing machined flaws, round chamfering, bright finishing, smooth finishing, etc.
The barrel polishing is carried out where the works and polishing mediums (hereafter, the : “medium” or “media™) are supplied into a polishing tank for barrel (hereafter, “polishing tank”) of the barrel polishing equipment, and then the works and the media are fluidized by having the polishing tank turn or vibrate, whereby the works are polished by colliding and contacting with the media The media can suitably be selected depending on the shape, materials, and the purpose of polishing, of the works. The material of the media can be selected from ceramics, metals, resins, etc. (see Patent documents 1-3).
Patent document:
Patent document 1: Laid:open application, Publication No. 2000-016868 Co
Patent document 2: Laid-open application, Publication No. 2007-268686
Patent document 3: Laid-open application, Publication No. H07-068463
Problem to be solved by the invention ]
The barrel polishing equipment using media made from ceramic or metal as base material can effectively polish. But depending on the material of the works, it sometimes causes impingement on or damages the works because of the collision of the works with the media.
The media having resin as a base material, on the other hand, has hardness that is less than that of ceramic or metal and has an advantage in that the works are less likely to be damaged by impingement. But they have less weight compared with the media made from ceramic or metal. So, they produce less energy when they collide with the works and have less polishing ability. Also, they have another disadvantage: as the media having resin as the base material has less abrasion resistance, they wear away more easily as the polishing progresses, and the polishing ability is likely to decrease. Particularly if the media are deformed in shape because of abrasion (uneven wear) and then if the conditions for contact of the works with the media change, not only the polishing ability decreases but also the corner parts of the works, depending on the shape of the works, cannot contact the media and the works cannot be polished evenly.
Means to solve problem
In view of the above problem the media for barrel polishing of the first invention comprise resin that constitutes the base material and abrasive grains that are dispersed within the resin, where a medium comprises a bottom body part having a shape of a cylinder (hereafter, the “bottom-body part”), one end surface of which bottom-body part forms a bottom of the medium, and an upper-body part having narrowing cross sections in horizontal planes (hereafter, the “upper-body part”), which upper-body part is continuous from the other end surface of the bottom-body part and the tip of which upper-body part forms an apex of the medium, where an intersection formed by the bottom surface and a side surface of the bottom-body part, a boundary between the bottom-body part and the upper-body part, and a cross section in a vertical plane that includes the apex of the :
oo upper-body part, all form convex curves. By having the medium have the bottom-body part and the upper-body part, the size of the medium will be smaller while the same shape is maintained, even though the medium wears away as the polishing progresses. In this way a change in conditions of contact between the works and media can be minimized such that the same conditions for polishing can be maintained. Also, by having the intersection formed by the bottom surface and the side surface of the bottom-body part, the boundary between the bottom-body part and the upper-body part, and the cross section in a vertical plane that includes the apex of the upper-body part, be formed so that they form convex curves (that is, all corner parts have smooth curves), the works do not suffer any damage when the media collide with the works.
The second invention is directed to the medium for barrel polishing of the first invention where the upper-body part has narrowing cross sections, the diameters of the cross sections being reduced at least in two stages as it goes toward the apex of the medium. By having the upper-body part that has the diameters of the cross sections be reduced in multiple steps as it goes toward the apex of the medium, the fluidity of a mass (the works and the media that are supplied to the tank for barrel polishing [if the wet-type barrel polishing is used, it includes also water and a polishing aid (compound)]) is improved and the polishing is carried out efficiently.
The third invention is directed to the medium for barrel polishing of the first or second invention where the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is 1:0.5 to 1:1.5. BN ;
The fourth invention is directed to the medium for barrel polishing of the first or second invention where the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex can be 1:0.8 to 1:1.0. By having the length from the bottom surface to the apex be equal to from 0.5 to 1.5 times the diameter of the bottom surface, preferably from 0.8 to 1.0 time, the works can be polished without being damaged by the impingement,
The fifth invention is directed to the medium for barrel polishing of any of the first to fourth inventions where the diameter of the bottom surface is from 1 to 40 mm. By having the diameter of the circular bottom surface be within this range, concave and convex parts and also the corner parts of the works can be suitably polished. :
The sixth invention is directed to the medium for barrel polishing of any of the first to fifth inventions where the resin has Vickers hardness of 10-30HV. By having the Vickers hardness of this range the works can be polished without being damaged by the impingement.
The seventh invention is directed to the medium for barrel polishing of the sixth invention where the medium comprises 30-70 mass % of abrasion grains in relation to the total mass of the medium. By having the mass % of abrasion grains within this range, the medium can have sufficient polishing ability. i
The eighth invention is directed to the medium for barrel polishing of the sixth-or seventh invention where the mass of the medium is from 0.01 to 50 g and the specific gravity is from 1.5 to 2.5. By having the mass of the medium and the specific gravity be within these ranges, sufficient collision energy can be obtained from the collision of the works with the media. So, the medium can produce sufficient polishing ability. ;
The present invention can provide the media that can polish the works without giving any impingement. Also, the media of the present invention can maintain a high capability for polishing for a long time. :
The media of the present invention can suitably be used in both (1) dry-type barrel polishing where the works and the media that are supplied to the polishing tank are fluidized, and the polishing is then carried out, and (2) wet-type barrel polishing where the works, the media, and water, and if necessary, the compound, that are supplied to the polishing tank, are all fluidized, and the polishing is then carried out.
Fig. 1 shows the shape of a medium in one embodiment of the present invention. Fig. 1 (A) is a front view, and Fig. 1 (B) is a view (bottom view) as seen from the direction A-A of Fig. 1(A).
Fig. 2 shows the shape of a medium in embodiment of the present invention.
Fig. 3 shows shapes of the media of the present invention.
Embodiment for carrying out the invention
One embodiment for carrying out the present invention is explained by reference to the drawings. Unless otherwise specified, in the explanation below, the directions of up and down, and those of left and right, are based on the drawings.
The medium 01 consists of the “bottom-body part” 11 that has continuous and circular : cross sections and the “upper-body part” 12 that is above the bottom-body part and that is ; continuous from the bottom-body part, where the diameters of the outer circumferences of the cross sections (or the side surface) of the upper-body part 12 continuously narrow as it :
oo goes upward. The size of the medium becomes smaller as the polishing progresses. If the size of the medium becomes smaller while it maintains its original shape because all parts of the medium wear away to the same degree on average as the polishing progresses, then the polishing ability will change just a little. But if uneven wear occurs with the medium : because the parts of the medium do not wear away to the same degree on average, the polishing ability will vary greatly because the conditions of contact will change between the work and the medium as the polishing progresses. For example, if the medium of a shape of square pole is used for barrel polishing, the shape of a square pole is gradually transformed into a cylindrical shape or a spherical shape, because the collision energy is concentrated on the corner parts of the medium. For this reason the polishing ability the medium at an initial stage differs greatly from that of the medium that is worn away. So, if the medium that is worn away is used, it causes the works to be insufficiently or unevenly polished. By the shape of the medium being formed as in the embodiments of the present invention, uneven wear of the medium can be prevented.
The intersection Ola that is formed by the bottom surface 11a (the lowest part in Fig. 1 (A)) of the bottom-body part and a side surface 11b that is perpendicular to the bottom surface
I1a, the boundary 01b between the bottom-body part 11 and the upper-body part 12, and the cross section in a vertical plane that includes the apex Olc of the upper-body part 12, all have shapes of convex curves (R-shape surfaces). As seen above, in the barrel polishing the works are polished in the polishing tank where the works and the media collide and contact each other. If the intersection Ola, the boundary 01b, and the apex Olc have angular corner parts (acute angles, right angle, obtuse angle), the impingement will be impressed, or will likely be impressed, on the surfaces of the works as the works and the media contact each other. However, it is feared that when the works and the media contact each other the media will be damaged because of the angles.
EE Co
As shown in Fig. 3, the upper-body part 12 has narrowing cross sections, the diameters of the cross sections being reduced in stages as it goes toward the apex of the medium. For example, the upper-body part 12 of Fig. 3 (A) has a cross section of a semi-elliptical shape, the cross section being in a vertical plane that includes the apex. The upper-body part 12 of
Fig. 3 (B) has a cross section in a vertical plane that includes the apex, where the cross section showing the side surface forms a line having the same angle of inclination as it goes upward and then the line inclines sharply as it nears the apex. The upper-body part 12 of
Fig. 3 (C) has a cross section in a vertical plane that includes the apex, where the cross section showing the side surface forms a line having the angle of inclination that changes in stages as it goes upward. As shown in Figs. 1 and 2, in the present embodiment the diameters of the cross sections are reduced in four stages (a-d in Fig. 2) as it goes toward the apex of the medium. The dashed lines in Fig. 2 give the borders between the sections of the upper-body part, which sections have different ratios as the cross sections narrow. By having the ratios in the narrowing of the cross sections of the upper-body part 12 (i.e., the angle of inclination of the side surface) being changed in two or more stages, uneven wear can be further reduced. Also, the fluidity of the mass in the barrel polishing can be improved. : If the ratio (Y/X) of the height of the medium Y (the distance from the apex Olc to the bottom surface 11a) to the diameter X of the bottom surface 11a is 0.5-1.5, more preferably 0.8-10, the uneven. wear that would occur with the medium as the polishing progresses is less likely to occur and the medium can maintain the same conditions for polishing for a ; . long time. The diameter X of the bottom surface can be suitably selected, depending on the ; sizes of the works. But the medium having a diameter of the bottom surface of 1-40 mm can polish even works that have corner parts that have concavities and convexities. Another problem that occurs in barrel polishing is that sometimes the medium is likely to be entangled in dented parts or in corner parts of the works. But by selecting the diameter X of the bottom surface within the above range, this problem can be avoided.
The media 01 comprise resin that forms basic material and abrasive grains that are dispersed within the resin. If the resin is too hard, the works are likely to be impressed with impingement when the works collide with the media. If the resin is too soft, the resin is likely to be deformed when the media collide with the works and the media cannot produce sufficient polishing ability. So as to obtain an appropriate polishing ability while preventing impingement from being impressed on the works, the hardness (Vickers hardness) of the resin should preferably be selected from 10-30 HV. Thermoplastic resin (for example, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.) and thermoset resin (for example, phenolic resins, unsaturated polyester resins, polyurethane resins, epoxy resins, urea resins, etc.) can be suitably used as the resin.
If the content of abrasion grains is too great, the hardness of the media become a high and the impingement will likely occur on the works when the media collide with the works. If the content of abrasion grains is too little, sufficient polishing ability to polish the works cannot be obtained. So as to obtain an appropriate polishing ability while preventing impingement from being impressed on the works, the contents of the abrasion grains should be selected from 30-70 mass % of the mass of the media. As the abrasion grains, publicly-known materials (for example, alumina, silica, silicon carbide, -iron oxide, boron oxide, zircon, chromium oxide, diamond, emery, and powders thereof or molded products that are made from these materials, etc.) can be suitably selected. Also, a mixture of the powders having two or more of the above materials can be used. Particle sizes the abrasion grains can be selected depending on the kinds of the abrasion grains, the sizes of the media, the shapes or the properties of the works, and the purpose of polishing. ;
Co : oo :
If the weight of the medium is too great, the collision energy that it gives to the works is too high and the impingement will be impressed on the surfaces of the works. If the weight of the medium is too little, the collision energy that it gives to the works is too little and sufficient polishing ability cannot be obtained. So, the weight of the medium should be selected from 0.01-50 g, more preferably it should be selected from 0.02-40 g. Further, the specific gravity (absolute specific gravity) should be selected from 1.5-2.5, more preferably from 1.8-2.2. In barrel polishing normally a plurality of the same media are supplied in the polishing tank. By having the media that have the specific gravity being selected from that range, and if the plurality of the works are supplied, the media will be dispersed uniformly ; in relation to all the works and can uniformly polish all the works.
Changes of the shapes of the media in barrel polishing using a centrifugal barrel polishing apparatus (type: EC-2, a product of Sintokogio, Ltd.) are being studied. Two kinds of media having the shapes that are specified in the embodiments are manufactured from the mass that is produced so that it has 60 mass % of abrasive grains in the thermoplastic resin having the Vickers hardness of 25 HV (the medium that has a diameter X of the bottom surface 11a: 6mm and the ratio (Y/X) of the height of the medium Y to the diameter of the bottom surface X: 1.0 (Example 1) and the medium that has a diameter of the bottom surfacella: 6 mm and the ratio (Y/X) of the height of the medium Y to the diameter of the bottom surface X: 1.3 (Example 2)). Also, as comparative examples, the media having the following shapes are manufactured from the mixture. The methods of manufacture were suitably selected from publicly-known methods, such as casting, extrusion, etc., depending on the shapes of the media,
Comparative example 1: a medium of a spherical shape having a 6 mm diameter oo
Comparative example 2: a medium of a square shape having a side length of 6 mm
Comparative example 3: a medium of a rectangular solid having a square bottom, one side of which square bottom is 6 mm long, and having a cross section in a longitudinal plane that is perpendicular to the square bottom, with the longitudinal length of the cross section having a length of 9 mm
Comparative example 4: a medium consisting of a bottom-body part and an upper-body part, the medium having a diameter X of the bottom surface 11a: 6mm and the ratio (Y/X) of the height of the medium Y to the diameter X of the bottom surface: 0.3
Comparative example 5: a medium consisting of a bottom-body part and an upper-body part, the medium having a diameter X of the bottom surfacella: 6 mm and the ratio (Y/X) of the height of the medium Y to the diameter X of the bottom surface: 1.7
Barrel polishing was carried out to remove films (coating) of the works that are painted black (angle steels, each having a bottom surface: 10x10 mm, thickness: 2 mm, R at "15 intersection: 1 mm, and the length: 10 mm). The media and the works were supplied to each of the four polishing tanks, which each have a cross-sectional shape of a hexagon, at a ratio of 5.0 in volume (the entire volume of the media/the entire volume of the works), until the media fills one-half of each of the polishing tanks. Then the polishing tank was placed on the centrifugal barrel polishing apparatus, which was then operated at a rotating speed of 200 rpm and a revolving speed of 200 rpm for half an hour. After the polishing was completed, the polishing tank was removed from the centrifugal barrel polishing apparatus and the works were taken out from the polishing tank. Then the same quantity of works was supplied to the polishing tank and the polishing was continued in the same way. The same operations of polishing were repeated for 70 cycles. A comparison was made between the work used in the first polishing and the work used in the seventieth polishing where the “shape of the media,” “impingement on the works” “finishing conditions of the works,”
and “polishing ability” were evaluated. The following is the criteria for the evaluation:
Shape of the media: media that maintained nearly the same shape (sizes may be different)=0, media that have some changes in the shape=A, and media that have shapes that greatly differ from the initial shapes=X. The evaluation was made by a visual inspection.
Impingement on the works: no impingement was observed by a visual inspection=0, and impingement was observed by a visual inspection=X. The evaluation was made by a visual inspection.
Finishing conditions of the works: films at the corner parts of the L-shaped section of the works were removed=o. Films at the corner parts of the L-shaped section of the work were not removed= X. The evaluation was made by a visual inspection.
Polishing ability: changes in weight before the polishing and after the polishing were measured.
The results of the evaluation of the barrel polishing are given below. As seen from the results, the media of the present invention can suitably carry out polishing even of the corner parts of the works, without being affected by the uneven wear or the lowering in polishing capacity, which would be caused as the polishing progresses.
Shapes of the media: although the sizes of the media have become smaller after the use of 70 cycles, compared with the initial sizes, none of the media in examples 1 and 2, and comparative example 1, has a substantial change in shapes. But in comparative examples 2 and 3, the shapes of the media have come closer to those of balls or ellipsoids, respectively.
About the media in comparative examples 4 and 5, the ratio (Y/X) between the diameter X ] and the height Y was changed to about 0.5 and about 1.4, respectively.
Co .
Impingement on the works: no impingement was recognized on any of the works that were used for barrel polishing.
Finishing conditions of the works: in Examples 1 and 2, the polishing of the corner parts was completed in both the first cycle and seventieth cycle. In comparative example 1 the polishing of the corner parts was not completed in either barrel polishing. In comparative examples 2-5, although the polishing of the corner parts was completed in each of the first cycles, the polishing of the corner parts was completed in none of the seventieth cycles.
From these facts it is seen that the media could not sufficiently contact the corner parts of the works because of the uneven wear of the media.
Polishing ability: in the barrel polishing with the media that have changes in shapes (examples 2-5) as the polishing cycles proceed, the surface roughness of the works that are polished in the seventeenth cycle is far greater than that of the works that were polished in a first cycle of polishing. So, from this fact it is seen that the polishing ability of the media has decreased, because of the changes in the shapes of the media that were caused by the uneven wear. Also, the surface roughness of the works that were polished with the media of comparative example 1 in the first cycle and those of the works that were polished in the seventieth cycle did not make much of a difference. But the surface roughness of the works of comparative example 1 was greater than the surface roughness of the media that were polished with the media of Examples 1 and 2. So, it is seen that the media of comparative example | do not have sufficient polishing ability. The surface roughness of the works that were polished with the media of Examples 1 and 2 is greatly reduced compared with that of the works before they were polished. Also, the difference between the surface roughness of ] the media in the first cycle and that of the media in the seventeenth cycle was small. So, it is seen that the media have maintained a suitable polishing ability for a long time.
’
Particularly, the media of Example 1 shows less difference in the polishing between the results obtained in the first cycle and those obtained in the seventieth cycle compared with the difference in the polishing between the results obtained in the first cycle and those obtained in the seventieth cycle in Example 2. So, the media of Example 1 are preferred.
Tabled shapes of media Impingement finishing conditions of polishing ability on works works (mg) 70M 70M 1 st 70! 70th 1* cycle 1¥ cycle 1¥ cycle cycle cycle cycle cycle cycle ome || oo ae] comparative x x 30 27 example 1 : comparative : x x 75 35 example 2 : comparative x x 70 32 example 3 comparative x 35 25 example 4 comparative ) ox 55 35 example 5 :
The media for barrel polishing of the present invention can be suitably used for both dry-type barrel polishing and wet-type barrel polishing. The media for barrel polishing of 3 the present invention can be suitably used not only in the centrifugal barrel polishing : 13 1 apparatus as were used in the Examples, but also in a vibratory barrel polishing apparatus, a fluidized barrel polishing apparatus, a rotary barrel polishing apparatus, and other publicly-known barrel polishing apparatuses.
The present application is based on Japanese Patent Application, No. 201 1.08423 1, filed
April 6, 2011, which is hereby incorporated in its entirety by reference in the present application.
The present invention will become more fully understood from the detailed description of this specification. However, the detailed description and the specific embodiment illustrate desired embodiments of the present invention and are described only for the purpose of explanation. Various possible changes and modifications will be apparent to those of ordinary skill in the art on the basis of the detailed description.
The applicant has no intention to dedicate to the public any disclosed embodiments.
Among the disclosed possible changes and modifications, those that may not literally fall within the scope of the present claims constitute, therefore, a part of the present invention in the sense of the doctrine of equivalents.
The use of the articles "a," "an," and "the," and similar referents in the specification and claims, are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by the context. The use of any and all examples, or exemplary language (e.g., "such as," etc.) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. .
Symbols 01 polishing medium (media)
Ola intersection 01b boundary
Olc apex 11 bottom body part having a shape of a cylinder (“bottom-body part”) 11a bottom surface 11b side surface 12 upper-body part having narrowing cross sections (“upper -body part”)
Claims (8)
1. A polishing medium for barrel polishing comprising resin ‘that Ccopstitytes the base - material and abrasive grains that are dispersed within the resin, wherein the polishing medium comprises a bottom body part having a shape of a cylinder (hereafter, the “bottom-body part”), one end surface of which bottom-body part forms a bottom of the polishing medium and an upper-body part having continuously narrowing cross sections in horizontal planes (hereafter, the “upper-body part”), which upper-body part is continuous from the other end surface of the bottom-body part and a tip of which upper-body part forms an apex of the polishing medium, and where an intersection formed by the bottom surface and a side surface of the bottom-body part, a boundary between the bottom-body part and the upper-body part. and a Cross section in a vertical plane that includes an apex of the upper-body part, all form I5 convex curves, and wherein the upper-body part has narrowing cross sections, the diameters of the cross sections being reduced at least in two stages as it goes toward the apex of the medium.
2. The polishing medium for barrel polishing according to claim 1, wherein the upper-body part has narrowing cross sections, the diameters of the Cross sections being reduced in four Stages as it goes toward the apex of the medium.
3. The polishing medium for barrel polishing according to claim 1 or 2, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is
1:0.5t0 1:1.5.
4. The polishing medium for barrel polishing according to claim 1 or 2, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is
1:.0.8t0 1:1.0. ] : .
5. The polishing medium for barrel polishing according to claim 1, wherein the diameter of the bottom surface is from 1 to 40 mm.
6. The polishing medium for barrel polishing according to claim 1, wherein the resin has Vickers hardness of 10-30 HV.
7. The polishing medium for barre] polishing according to claim 6, wherein the polishing medium comprises 30-70 mass % of abrasion grains in relation to the total mass of the polishing medium. :
:
8. The polishing medium for barrel polishing according to claim 6 or 7, wherein the mass of the polishing medium is from 0.01 to 50 g and the specific gravity of the polishing medium is form 1.5 to 2.5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011084231 | 2011-04-06 | ||
| PCT/JP2012/058872 WO2012137713A1 (en) | 2011-04-06 | 2012-04-02 | Abrasive medium for barrel polishing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PH12013502028B1 true PH12013502028B1 (en) | 2013-12-16 |
Family
ID=46969113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PH12013502028A PH12013502028B1 (en) | 2011-04-06 | 2013-09-30 | Abrasive medium for barrel polishing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6496103B2 (en) |
| CN (1) | CN203751923U (en) |
| PH (1) | PH12013502028B1 (en) |
| TW (1) | TWI648128B (en) |
| WO (1) | WO2012137713A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5953328B2 (en) * | 2014-02-27 | 2016-07-20 | 株式会社アライドマテリアル | MOUNTING MATERIAL, WORK PROCESSING METHOD USING THE SAME AND MOUNTING BODY FOR FLAT |
| JP2016036852A (en) * | 2014-08-05 | 2016-03-22 | 株式会社不二Ｗｐｃ | Fine dimple formation method and member provided with fine dimple formed by the same |
| CN108148506B (en) * | 2017-11-27 | 2020-08-18 | 东莞富兰地工具股份有限公司 | Polishing medium, preparation method and application thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191229418A (en) * | 1910-08-06 | 1913-02-13 | Wenger & Cie | Process and Apparatus for Polishing Silver Articles. |
| GB1480096A (en) * | 1974-08-29 | 1977-07-20 | Ceratex Eng Ltd | Plastics abrasive media |
| JPS57194871A (en) * | 1981-05-26 | 1982-11-30 | Nippon Kokan Kk <Nkk> | Beveling and smoothing device of media for barrel polishing |
| EP0130536A3 (en) * | 1983-07-01 | 1986-09-10 | Carl Kurt Walther GmbH & Co. KG | Polishing of wooden pieces in vibrating polishing containers and abrading bodies for this purpose especially |
| US4712333A (en) * | 1986-01-23 | 1987-12-15 | Huck Manufacturing Company | Tumbling media |
| US4765100A (en) * | 1987-05-13 | 1988-08-23 | Cookeville Uniform Rental, Inc. | Method of abrading new garments |
| DE3812491A1 (en) * | 1988-04-15 | 1989-10-26 | Walther Carl Kurt Gmbh | Abrading bodies for the tumbling process |
| IT1252328B (en) * | 1991-07-18 | 1995-06-08 | Rollwasch Italiana Spa | AGGLOMERATED ABRADENT DEVICE PARTICULARLY FOR TUMBLING AND SIMILAR AS WELL AS REALIZATION PROCEDURE. |
| DE102006047442B3 (en) * | 2006-09-20 | 2008-04-10 | Walther Trowal Gmbh & Co. Kg | Slip-grinding tool i.e. rotational solid, for workpiece, has base surface provided opposite to round point, and cone section connected to round point with cone angle, where cone section arises from large-diameter socket |
-
2012
- 2012-04-02 JP JP2013508855A patent/JP6496103B2/en active Active
- 2012-04-02 CN CN201290000396.4U patent/CN203751923U/en not_active Expired - Lifetime
- 2012-04-02 WO PCT/JP2012/058872 patent/WO2012137713A1/en active Application Filing
- 2012-04-03 TW TW101111811A patent/TWI648128B/en active
-
2013
- 2013-09-30 PH PH12013502028A patent/PH12013502028B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2012137713A1 (en) | 2014-07-28 |
| WO2012137713A1 (en) | 2012-10-11 |
| TWI648128B (en) | 2019-01-21 |
| JP6496103B2 (en) | 2019-04-03 |
| CN203751923U (en) | 2014-08-06 |
| TW201242720A (en) | 2012-11-01 |
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