EP0476272B1 - Rotary polishing tool - Google Patents

Rotary polishing tool Download PDF

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Publication number
EP0476272B1
EP0476272B1 EP91112586A EP91112586A EP0476272B1 EP 0476272 B1 EP0476272 B1 EP 0476272B1 EP 91112586 A EP91112586 A EP 91112586A EP 91112586 A EP91112586 A EP 91112586A EP 0476272 B1 EP0476272 B1 EP 0476272B1
Authority
EP
European Patent Office
Prior art keywords
substrate
polishing portion
rotary
polishing
tool according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91112586A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0476272A1 (en
Inventor
Noboru C/O Shoken Industrial Co. Ltd. Watanabe
Kunihiro C/O Shoken Industrial Co. Ltd. Miyao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIYAI SUMFLEX INDUSTRIES Co Ltd
SHOKEN INDUSTRIAL Co Ltd
Miyai Sumflex Ind Co Ltd
Shoken Ind Co Ltd
Original Assignee
MIYAI SUMFLEX INDUSTRIES Co Ltd
SHOKEN INDUSTRIAL Co Ltd
Miyai Sumflex Ind Co Ltd
Shoken Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MIYAI SUMFLEX INDUSTRIES Co Ltd, SHOKEN INDUSTRIAL Co Ltd, Miyai Sumflex Ind Co Ltd, Shoken Ind Co Ltd filed Critical MIYAI SUMFLEX INDUSTRIES Co Ltd
Publication of EP0476272A1 publication Critical patent/EP0476272A1/en
Application granted granted Critical
Publication of EP0476272B1 publication Critical patent/EP0476272B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the present invention relates to a rotary polishing tool according to the preamble of claim 1 (see DE-A-34 16 186), which is driven by an electric motor for polishing a workpiece.
  • Rotary polishing tools conventionally used include one comprising a disk-shaped polishing portion corresponding to a workpiece and a disk-shaped substrate made of resin for supporting the polishing portion with the polishing portion being bonded thereto.
  • the polishing work using such a rotary polishing tool is performed by mounting this tool on a driving shaft of an electric motor and rotating the same to press the above polishing portion against the workpiece.
  • the tool is rotated at high peripheral speed of, for example, a maximum of approximately 80 m/s. Consequently, a substantially large centrifugal force is developed in this tool. In addition, a large reaction force is applied to this tool from the workpiece. Accordingly, it is particularly desired that the above substrate has sufficient strength.
  • the above substrate is made of metal to improve the strength thereof. If this substrate is merely a metal plate, however, such problems arise that the tool becomes heavy and the centrifugal force becomes the larger.
  • a first object of the present invention is for a tool to have sufficient strength to oppose a centrifugal force and a reaction force which is applied from a workpiece.
  • a second object of the present invention is to prevent a tool from being heavy even if the tool has the above described strength.
  • a third object of the present invention is for a polishing portion constituting a tool to be supported by a substrate while holding sufficient strength.
  • Figs. 1 shows a first embodiment
  • reference numeral 1 denotes a rotary polishing tool.
  • This rotary polishing tool 1 has a disk-shaped polishing portion 3 corresponding to a workpiece 2 and a substrate 4 for supporting the polishing portion 3.
  • This substrate 4 is positioned on a rotary center 3a of the above polishing portion 3, and has a disk shape and an approximately circular truncated conical shape.
  • the above polishing portion 3 is made of a rubber material having abrasive grains included therein.
  • tile above substrate 4 is a metal plate made of iron and is provided with a lot of circular holes 5. Although the holes 5 are formed almost uniformly throughout the substrate 4, they are illustrated only in a part of the substrate 4 in Fig. 1.
  • a rubber layer 6 is interposed between the polishing portion 3 and the substrate 4. This rubber layer 6 is vulcanized and bonded to the polishing portion 3 and the substrate 4, to fix the polishing portion 3 and the substrate 4 to each other.
  • reference numeral 6a denotes a boundary surface of the above rubber layer 6 and the above polishing portion 3. Since the above polishing portion 3 is also made of a rubber material as described above, however, the polishing portion 3 and the rubber layer 6 are simultaneously vulcanized and bonded to the substrate 4, to be integrated with each other. Therefore, the above boundary surface 6a does not, in fact, clearly exist.
  • a glass fiber 7 is embedded in the above rubber layer 6 so that they are integrated with each other, thereby to strengthen the rubber layer 6.
  • the above substrate 4 is provided (with a circular mounting hole 8 on the above rotary center 3a.
  • the polishing portion 3 is also provided with another mounting hole 8a connected to the above mounting hole 8.
  • the above described holes 5 are formed in a portion other than the outer periphery of the substrate 4 and the periphery of the mounting hole 6. More specifically, both the outer and inner peripheries of the substrate 4 have a continuously circular shape, so that the decrease in strength of the substrate 4 due to the formation of the holes 5 is effectively restrained.
  • a driving shaft 10 of a handy electric motor 9 is first passed through the above mounting hole 8 and the other mounting hole 8a and a flanged nut 11 is screwed into the driving shaft 10, thereby to mount the rotary polishing tool 1 on the above driving shaft 10.
  • the rotary polishing tool 1 is then rotated by driving off the electric motor 9. If the polishing portion 3 is pressed against the above workpiece 2, this workpiece 2 is polished.
  • the above rubber layer 6 may be made of exactly the same material as that of the polishing portion 3, that is, the polishing portion 3 and the rubber layer 6 may be integrally formed using a rubber material having abrasive grains included therein. In this case, the above boundary surface 6a does not exist.
  • the substrate 4 for supporting the polishing portion 3 is made of metal and is further formed in an approximately circular truncated conical shape. Accordingly, the strength of the rotary polishing tool 1 can be considerably improved, as compared with the conventional case where the substrate 4 is made of resin. Consequently, this rotary polishing tool 1 has sufficient strength to oppose a centrifugal force and a reaction force which is applied from the workpiece 2.
  • the rotary polishing tool 1 can be lightweight while sufficiently holding the strength.
  • the rubber layer 6 which is interposed between the polishing portion 3 and the substrate 4 and vulcanized and bonded to the polishing portion 3 and the substrate 4 to fix the polishing portion 3 and the substrate 4 to each other. Accordingly, when the polishing portion 3 is brought into contact with the workpiece 2 so that an impact force is applied to the polishing portion 3 from the workpiece 2, this impact force is absorbed by the above rubber layer 6. Consequently, a part of the polishing portion 3 can be prevented from being stripped off from the substrate 4 by the above impact force. That is, the polishing portion 3 is supported by the substrate 4 while holding sufficient strength.
  • the above polishing portion 3 is firmly bonded to the lower surface of the substrate 4 through the rubber layer 6 strengthened by the glass fiber 7.
  • the rubber layer 6 enters the above holes 5 at the time of vulcanization, thereby to sufficiently strength the above bonding. Consequently, also in this point, the polishing portion 3 is supported by the substrate 4 while holding sufficient strength.
  • the substrate 4 can be embedded in the rubber layer 6 (not shown) so that they are integrated with each other. By doing so, the adhesive strength of a polishing portion 3 to the substrate 4 is further improved.
  • Fig. 2 shows a second embodiment.
  • a reinforcing pipe 13 made of metal is fitted in the inner peripheral surface of another mounting hole 8a.
  • This pipe 13 is formed by squeezing a substrate 4 using a press.
  • This pipe 13 may be welded to the substrate 4.
  • a nut 14 is welded to the lower end of the above pipe 13.
  • the nut 14 is screwed into a driving shaft 10 of an electric motor 9 to screw the pipe 13 on the driving shaft 10, thereby to mount a rotary polishing tool 1 on the electric motor 9.
  • the above pipe 13 prevents a polishing portion 3 and a rubber layer 6 from being deformed.
  • the tool 1 is firmly mounted on the electric motor 9 by screwing the above pipe 13 on the driving shaft 10, to reliably prevent the vibration caused when a centrifugal force is developed.
  • polishing portion 3 and the rubber layer 6 are sandwiched between the substrate 4 and the nut 14 in the periphery of the other mounting hole 8a. Consequently, the polishing portion 3 is supported by the substrate 4 more reliably. Meanwhile, the nut 14 and the pipe 13 may be separately formed.
  • annulus ring portions 15 are respectively formed in opening edges of holes 5 and the mounting hole 8 by press working of the opening edges.
  • the annulus ring portions 15 are respectively projected into the rubber layer 6 from the substrate 4. Consequently, the strength of the substrate 4 is improved, and bonding of the rubber layer 6 to the substrate 4 is further strengthened. Meanwhile, the amount of projection of each of the above annulus ring portions 15 is approximately 0.5 to 1 mm.
  • Fig. 3 shows another embodiment.
  • a nut 17 is fitted in the inner peripheral surface of each of the mounting hole 8 and another mounting hole 8a and is welded to a substrate 4, to reinforce a rotary polishing tool 1.
  • the polishing portion 3 is constituted by a lot of pieces of abrasive paper or abrasive felt which are radially disposed around the rotary center 3a. A part of the polishing portion 3 is embedded in the rubber layer 6 so that the polishing portion 3 is bonded to the rubber layer 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP91112586A 1990-09-03 1991-07-26 Rotary polishing tool Expired - Lifetime EP0476272B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP92854/90U 1990-09-03
JP1990092854U JPH0711887Y2 (ja) 1990-09-03 1990-09-03 回転研磨工具

Publications (2)

Publication Number Publication Date
EP0476272A1 EP0476272A1 (en) 1992-03-25
EP0476272B1 true EP0476272B1 (en) 1994-11-30

Family

ID=14066016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112586A Expired - Lifetime EP0476272B1 (en) 1990-09-03 1991-07-26 Rotary polishing tool

Country Status (6)

Country Link
EP (1) EP0476272B1 (ja)
JP (1) JPH0711887Y2 (ja)
AT (1) ATE114529T1 (ja)
CA (1) CA2047255C (ja)
DE (1) DE69105422T2 (ja)
ES (1) ES2064826T3 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD408601S (en) 1998-02-23 1999-04-20 Minnesota Mining And Manufacturing Company Surface treating article
USD409340S (en) 1998-02-23 1999-05-04 Minnesota Mining And Manufacturing Company Hub

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2605973Y2 (ja) * 1992-09-01 2000-09-04 株式会社昭研 研磨・研削用具
IT232262Y1 (it) * 1993-09-24 1999-12-17 Quintilio Lupi Mola a base elastica per la levigatura e lucidatura di profili toroidali in materiali duri.
US6136143A (en) * 1998-02-23 2000-10-24 3M Innovative Properties Company Surface treating article including a hub
DE10348930A1 (de) * 2003-10-18 2005-05-12 Bosch Gmbh Robert Tellereinleger für einen Schleifteller eines handgeführten Elektroschleifwerkzeugs
CN102107397B (zh) * 2009-12-25 2015-02-04 3M新设资产公司 研磨砂轮的制造方法及研磨砂轮

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581567A (en) * 1948-12-29 1952-01-08 Darrell R Wiley Buffer backing pad
US2997820A (en) * 1959-12-14 1961-08-29 American Emery Wheel Works Organic bond abrasive wheel
US3143770A (en) * 1960-07-21 1964-08-11 Formax Mfg Corp Molding apparatus for sanding pad assembly
US3256646A (en) * 1963-08-06 1966-06-21 Mockli Rene Grinding disc
JPS4725748U (ja) * 1971-04-14 1972-11-22
US4150955A (en) * 1974-05-01 1979-04-24 The Manufacturers Brush Company Deformable non-cellular polyurethane polishing wheel
DE3416186A1 (de) * 1983-05-17 1985-01-24 Hans J. 4400 Münster Fabritius Schleifscheibe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD408601S (en) 1998-02-23 1999-04-20 Minnesota Mining And Manufacturing Company Surface treating article
USD409340S (en) 1998-02-23 1999-05-04 Minnesota Mining And Manufacturing Company Hub

Also Published As

Publication number Publication date
DE69105422D1 (de) 1995-01-12
JPH0451364U (ja) 1992-04-30
ATE114529T1 (de) 1994-12-15
EP0476272A1 (en) 1992-03-25
CA2047255C (en) 1994-08-30
CA2047255A1 (en) 1992-03-04
ES2064826T3 (es) 1995-02-01
DE69105422T2 (de) 1995-04-06
JPH0711887Y2 (ja) 1995-03-22

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