EP3052268A1 - Pad for supporting grinding disk - Google Patents
Pad for supporting grinding diskInfo
- Publication number
- EP3052268A1 EP3052268A1 EP14851357.5A EP14851357A EP3052268A1 EP 3052268 A1 EP3052268 A1 EP 3052268A1 EP 14851357 A EP14851357 A EP 14851357A EP 3052268 A1 EP3052268 A1 EP 3052268A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- pad
- support surface
- grinding disk
- air passages
- 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.)
- Withdrawn
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 230000001186 cumulative effect Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
Definitions
- One aspect of the present invention relates to a pad for supporting a grinding disk.
- Patent Document 1 describes an orbital sander drive device in which a drive shaft having a first end rotatably connected to a rotary shaft with eccentricity relative to the rotary shaft extending from a drive source provided on a drive unit eccentrically moves around a shaft core of the rotary shaft by the rotation of the rotary shaft to obitally move a base plate supported by the drive unit via a support column composed of an elastic member and affixed to a second end of the drive shaft.
- Patent Document 1 Japanese Unexamined Patent Application Publication
- a grinding disk is attached to a grinding machine such as the orbital sander drive device described above.
- the grinding disk generally, is a component obtained by affixing particles or fine powder of an abrasive on a surface of a flexible base material made of cotton cloth, paper, or the like with an adhesive (glue, gelatin, synthetic resin, and the like). Therefore, there is a possibility that the adhering portion of the grinding disk or a portion of the base material portion may expand due to heat generated in the grinding disk during grinding, thereby lowering grinding efficiency and shortening the life of the grinding disk. There is also a possibility that the expansion may cause an undesirable vibration in the grinding disk during operation, rendering use of the grinding machine difficult. Thus, suppressing an increase in heat generated in the grinding disk during grinding is desired.
- the pad according to one aspect of the present invention is a pad supporting a grinding disk by being affixed to a shaft of a grinding machine together with the grinding disk, the pad including a support surface opposing the grinding disk, a back surface opposing the support surface, and a plurality of air passages formed at a predetermined spacing along a circumferential direction of the support surface, wherein at least a portion of each of the air passages penetrates from the support surface to the back surface and each of the air passages is formed to a peripheral portion of the support surface.
- an increase in heat generated in the grinding disk during grinding can be suppressed.
- FIG. 1 is a diagram illustrating an appearance of a portable grinder provided with a pad according to an embodiment.
- FIG. 2 is an exploded perspective view for describing the attachment of the pad according to the embodiment.
- FIG. 3 is a perspective view illustrating a support surface of the pad according to the embodiment.
- FIG. 4 is a perspective view illustrating a back surface of the pad according to the embodiment.
- FIG. 5 is a front view illustrating a support surface of the pad according to the embodiment.
- FIG. 6 is a graph showing cumulative grinding amounts in Working Examples and Comparative Examples.
- FIG. 7 is a graph showing the grinding amount for every 30 seconds in Working Examples and Comparative Examples.
- a structure of a pad 10 according to the embodiment is described using
- the pad 10 is a component for supporting a grinding disk 20 to be attached to a portable grinder (grinding machine) 1 illustrated in FIG. 1.
- a hard resin such as nylon is selected as the material for the pad 10 in consideration of heat resistance but the material of the pad 10 is not limited thereto. Also, the type of the grinding machine is not limited and the pad 10 can be applied to any grinding machine.
- the grinding disk 20 is a grinding tool in a circular plate shape and is used by attaching to the portable grinder 1 and rotating.
- the grinding disk 20 is obtained by evenly affixing particles or fine powder of an abrasive onto the surface of the flexible base material of cotton cloth, paper, or the like with an adhesive such as glue, gelatin, synthetic resin, and the like. Therefore, the grinding disk 20 has a certain degree of flexibility. It is preferred that the base material of the grinding disk 20 be a material that has sufficient strength and heat resistance.
- the pad 10 and the grinding disk 20 are removably attached to the main body of the portable grinder 1. As illustrated in FIG. 2, a through hole 10a is formed in the pad 10 through which a shaft 2 extending from the main body of the portable grinder 1 passes. A user inserts the pad 10 first into the shaft 2 and inserts the grinding disk 20 next. Then, the user affixes the pad 10 and the grinding disk 20 to the shaft 2 by tightening a nut 3 on a male screw formed on an end portion of the shaft 2.
- the surface of the pad 10 opposed to the grinding disk 20 functions as a support surface 1 1 for supporting the grinding disk 20 during grinding.
- the surface of the pad 10 opposed to the support surface 1 1 is referred to as a back surface 12.
- the pad 10 and the grinding disk 20 rotate at a high speed around the shaft 2 when the portable grinder 1 is activated by the user.
- the user can grind a surface by applying the grinding disk 20 to the surface of the grinding object.
- grinding is a concept that also includes grinding down.
- the user removes the nut 3 from the shaft 2, replaces the grinding disk 20 to a new one, and re-tightens the nut 3 on the shaft 2. Meanwhile, the pad 10 is reusable and the user does not need to replace the pad 10 each time together with the grinding disk 20. Note that the pad 10 may be provided in a fixed manner to the shaft 2.
- each of the air passages 14 is formed in an arc shape that is convex in the rotation direction of the pad 10 rather than in a linear shape.
- each air passage 14 is formed so that it becomes convex in the counterclockwise direction, but of course, the air passage 14 may be formed to become convex in the clockwise direction.
- the degree of curvature of the air passage 14 may be set as desired. Also, the number of the air passages 14 formed on the support surface 1 1 and the spacing between the air passages 14 may also be set as desired.
- Each air passage 14 is formed to the peripheral portion of the support surface 1 1 from the recess 10b or from the vicinity of the recess 10b.
- a majority of each air passage 14 is a groove and an end portion Therefore, both ends of the air passage 14 are not blocked even when disposing the grinding disk 20 on the support surface 11 , and the air can flow to the end portion 14b of the peripheral side from the end portion 14a of the back surface 12 side by rotating the pad 10.
- the pad according to one aspect of the present invention is a pad supporting a grinding disk by being affixed to a shaft of a grinding machine together with the grinding disk, the pad including a support surface opposing the abrasive disk, a back surface opposing the support surface, and a plurality of air passages formed at a
- each of the air passages penetrates from the support surface to the back surface, and each of the air passages is formed to the peripheral portion of the support surface.
- each air passage may be formed in a spiral form. Forming the air passage in this manner allows heat to be discharged more effectively because the flow of air in this passage is further improved during the rotation of the pad.
- each of the air passages may be in an arc shape that is convex in the rotation direction. It is possible to discharge heat more effectively because the flow of air in this passage is further improved during the rotation of the pad by forming the air passage in this manner.
- a pad corresponding to the pad 10 described above is prepared.
- the pad was made of a polyamide-based synthetic resin and the outer diameter thereof was 96 mm.
- the length of the air passage was 33 mm, and the width and depth of the groove of the air passage was 3 mm and 2.5 mm, respectively.
- the through-hole was 10 mm and 3 mm, respectively.
- the spacing of the adjacent air passages was 6 mm.
- a pad identical to the working example was prepared having the through-holes of each air passage sealed with a seal on the back surface.
- all configurations and the grinding object were common between the working example and the comparative example.
- thermochromic member A thermo label 5E- 120 produced by NiGK Corporation was used as the thermochromic member, and the thermochromic member was adhered to the back surface of the pad.
- the grinding time was 60 seconds and the grinding load applied to the grinder by the worker was from 1 to 5 kg.
- Table 1 The temperature measurement results for the working examples and the comparative examples are shown in Table 1.
- the black circle in Table 1 means that the pad reached a temperature indicating the highest level during grinding, and the hyphen means that the pad did not reach that temperature. Therefore, Table 1 shows that the temperature of the pads in the working examples did not reach 125°C whereas the temperature of the pads in the comparative examples reached 160°C.
- the grinding amount when grinding the flat plate using the portable grinder was measured for the working examples and the comparative examples. This measurement was performed every 30 seconds until grinding was no longer possible. In each of the working examples and the comparative examples, the measurement of the grinding amount was performed twice by exchanging the grinding disk and the grinding object (sample).
- Table 2 and FIG. 6 show the transition of the cumulative grinding amount (g) for the four total samples of the working example and the comparative example.
- the horizontal axis and the vertical axis of the graph in FIG. 6 are the elapsed time (seconds) and the cumulative grinding amount (g) from the start of grinding, respectively.
- the solid line shows the results of the working example and the broken line shows the results of the comparative example. Table 3 and FIG.
- FIG. 7 show the transition of the grinding amount per 30 seconds (g/30 seconds) calculated from the results of Table 2.
- the horizontal axis and the vertical axis of the graph of FIG. 7 are the elapsed time (seconds) and the grinding amount per about 30 seconds (g/30 seconds) from the start of grinding, respectively.
- the solid line shows the results of the working example and the broken line shows the results of the comparative example.
- the through-hole 14a of the air passage 14 can be formed in the middle of the air passage.
- the through-hole to the back surface may be formed in a plurality of locations of the air passage, for example, it is possible to form a through-hole in two locations such as the end portion of the center side of the pad and a portion in the middle.
- the air passage 14 included a groove portion, but the entire air passage may penetrate from the support surface to the back surface (that is, the groove portion may be absent).
- the air passage 14 had an arc shape in the above embodiment, but the air passage may be formed in a linear shape.
- a plurality of air passages 14 was formed in a spiral shape in the above embodiment, but the aspect of forming an air passage is not limited thereto and, for example, the plurality of air passages may be formed radially. Even when the air passages are provided radially, each air passage may be formed in an arc shape that is convex in the rotation direction, or they may be formed in a linear shape.
- each air passage may be formed substantially radial.
- the width of the air passage 14 is constant in the above embodiment, but it is also possible to form each air passage so that the width becomes wider toward the peripheral portion from the center portion of the support surface.
- the width of each air passage may be wider from the center portion of the support surface toward the peripheral portion. Widening the outlet side of the air in this way allows air to easily flow by the rotation of the pad and discharge the heat more efficiently.
- the portable grinder was illustrated as an example of the grinding machine in the above embodiment, but the type of grinding machine is not limited.
- the pad according to the present invention is applicable to any grinding machine using a grinding disk.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013209271A JP2015071217A (en) | 2013-10-04 | 2013-10-04 | Pad for supporting grinding disk |
PCT/US2014/058525 WO2015050926A1 (en) | 2013-10-04 | 2014-10-01 | Pad for supporting grinding disk |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3052268A1 true EP3052268A1 (en) | 2016-08-10 |
EP3052268A4 EP3052268A4 (en) | 2017-06-28 |
Family
ID=52779088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14851357.5A Withdrawn EP3052268A4 (en) | 2013-10-04 | 2014-10-01 | Pad for supporting grinding disk |
Country Status (6)
Country | Link |
---|---|
US (1) | US20160214234A1 (en) |
EP (1) | EP3052268A4 (en) |
JP (1) | JP2015071217A (en) |
CN (1) | CN105579193A (en) |
TW (1) | TW201532730A (en) |
WO (1) | WO2015050926A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3580011A4 (en) * | 2017-02-13 | 2020-10-07 | Mirka Ltd. | Conduit arrangements in intermediate pad, backing pad, and abrading article for extracting abrading debris |
JP7465640B2 (en) * | 2019-08-06 | 2024-04-11 | 株式会社マキタ | Power Tools |
JP7454830B2 (en) * | 2019-09-25 | 2024-03-25 | 株式会社マルテー大塚 | Disc pad for grinder |
MX2022006216A (en) * | 2019-11-27 | 2022-06-22 | 3M Innovative Properties Company | Robotic paint repair. |
KR102182704B1 (en) * | 2019-12-31 | 2020-11-25 | 주식회사 르본인터내셔널 | A lapping process for precise and rapid lapping |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2527762A (en) * | 1947-10-14 | 1950-10-31 | Harold H Pratt | Abrasive disk support |
US2819568A (en) * | 1957-04-18 | 1958-01-14 | John N Kasick | Grinding wheel |
US3187475A (en) * | 1963-02-18 | 1965-06-08 | Edward J Sopcak | Backing disc for abrasive sheet |
US3299584A (en) * | 1964-07-22 | 1967-01-24 | Mark H Landis | Vacuum heads for disc grinders, sanders and the like |
US3754359A (en) * | 1970-09-16 | 1973-08-28 | Spam D Avray | Abrasion tools |
FR2365411A1 (en) * | 1976-09-27 | 1978-04-21 | Robert Jean | SANDPAPER DISC SANDER MOUNTED ON A ROTATING CIRCULAR PLATE |
JPS55115750U (en) * | 1979-02-09 | 1980-08-15 | ||
JPS6383269U (en) * | 1986-11-17 | 1988-06-01 | ||
JPH078135Y2 (en) * | 1988-06-28 | 1995-03-01 | 株式会社サンク理研工業 | Rotary grinding wheel |
JPH07237131A (en) * | 1994-03-01 | 1995-09-12 | Hiroaki Yasuda | Pad for grinding material furnishing |
US6007415A (en) * | 1995-12-08 | 1999-12-28 | Norton Company | Sanding disks |
US5674116A (en) * | 1996-10-09 | 1997-10-07 | Cmi International Inc. | Disc with coolant passages for an abrasive machining assembly |
EP0836911A1 (en) * | 1996-10-11 | 1998-04-22 | Sandro Giovanni Giuseppe Ferronato | Backup pad for a flexible grinding disc |
US6196911B1 (en) * | 1997-12-04 | 2001-03-06 | 3M Innovative Properties Company | Tools with abrasive segments |
DE102004009443A1 (en) * | 2004-02-27 | 2005-09-15 | August Rüggeberg Gmbh & Co. Kg | Tool for machining |
CN2701589Y (en) * | 2004-04-06 | 2005-05-25 | 陈信宇 | Abrasive disc with improved structure |
JP4549778B2 (en) * | 2004-08-24 | 2010-09-22 | 一郎 小松原 | Sanda's Pat |
EP1935560A1 (en) * | 2006-12-19 | 2008-06-25 | sia Abrasives Holding AG | Cooling plate, grinding system and grinding tool |
ITMI20080222U1 (en) * | 2008-07-15 | 2010-01-16 | Valentini Guido | "CUP FOR WORKING SURFACES WITH CURVED SUCTION CHANNELS" |
US7927193B2 (en) * | 2008-07-21 | 2011-04-19 | Ryszard Mikrut | Backup assembly for a sanding device |
JP2012218151A (en) * | 2011-04-13 | 2012-11-12 | Shinoh Polymer Co Ltd | Polishing disk attachment/detachment device for hand grinder |
-
2013
- 2013-10-04 JP JP2013209271A patent/JP2015071217A/en active Pending
-
2014
- 2014-10-01 CN CN201480052674.4A patent/CN105579193A/en active Pending
- 2014-10-01 EP EP14851357.5A patent/EP3052268A4/en not_active Withdrawn
- 2014-10-01 WO PCT/US2014/058525 patent/WO2015050926A1/en active Application Filing
- 2014-10-01 US US15/024,198 patent/US20160214234A1/en not_active Abandoned
- 2014-10-03 TW TW103134653A patent/TW201532730A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US20160214234A1 (en) | 2016-07-28 |
TW201532730A (en) | 2015-09-01 |
WO2015050926A1 (en) | 2015-04-09 |
EP3052268A4 (en) | 2017-06-28 |
JP2015071217A (en) | 2015-04-16 |
CN105579193A (en) | 2016-05-11 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20160421 |
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AK | Designated contracting states |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20170529 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: B24D 9/08 20060101ALI20170522BHEP Ipc: B24B 23/02 20060101AFI20170522BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180103 |