EP2714334A1 - Grinding head - Google Patents
Grinding headInfo
- Publication number
- EP2714334A1 EP2714334A1 EP12792057.7A EP12792057A EP2714334A1 EP 2714334 A1 EP2714334 A1 EP 2714334A1 EP 12792057 A EP12792057 A EP 12792057A EP 2714334 A1 EP2714334 A1 EP 2714334A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding head
- brushes
- abrasive paper
- rotation
- paper members
- 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.)
- Granted
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 241001532173 Agave lecheguilla Species 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B24D13/145—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face having a brush-like working surface
-
- 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
- B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
- B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
-
- 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
- B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
-
- 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 concerns a grinding head of the kind indicated in the preamble of claim 1.
- EP 1633530 Bl describes a grinding head or an abrading disc of the kind indicated in the preamble of claim 1 , intended for being rotated about a central axis.
- the abrading disc has a surface with radial retainer grooves for end parts of abrasive paper members with associated support brushes with a radial extension over the greater part of radius of the surface which has increasing height inwardly from the periphery.
- the abrading disc is designed such that the surface has increasing height inwardly from a periphery of the surface, and so that the abrasive paper members have approximately radial extension across the greater part of radius of the surface.
- a stable and uniform grinding which is suited for grinding concave, convex and plane surfaces and recesses/countersinks.
- the abrasive paper members are distributed diametrically and evenly on the surface of the grinding disc such that the abrasive paper members here cover the greater part of the radius of the surface, entailing that the greater part of the grinding disc surface can be used for counter grinding.
- the surface has increasing height inwards from the periphery of the surface causes the grinding wheel to be felt very stable as it is the centre part of the grinding disc which strikes the surface to be ground first.
- the centre part of the grinding wheel there will be no large lateral forces pulling the grinding disc across the surface, and therefore it will be easy to hold the grinding disc against the surface.
- the purpose of the invention is to indicate a further improved grinding head which makes it easier to achieve a more optimal grinding particularly of side edges and edge areas of plate-shaped items, e.g. blockboard and furniture doors, or corresponding plate-shaped items.
- the grinding head according to the invention is peculiar in that the abrasive paper members are mounted at an angle of 20-40°, preferably about 30°, directed obliquely forward in the direction of rotation of the plane surface and the tangential plane of the cylindrical surface, respectively.
- a more optimal abrading of particularly side edges and edge areas of plate-shaped items can be optimised by the oblique angle directed forward in the direction of rotation, further facilitating the making of a slight chamfer or rounding of outer top side edges of laser-cut items of metal sheeting.
- the grinding head according to the invention is designed such that the retainer grooves for the edge profile parts of the abrasive paper members extend obliquely rearwards in the direction of rotation of the plane surface at an angle of 3-10° relative to a radial extension.
- the grinding head according to the invention is designed such that the retainer grooves for the edge profile parts of the abrasive paper members extend obliquely rearwards in direction of rotation of the cylindrical surface at an angle of 3- 10° relative to an axially parallel generatrix of the cylindrical surface.
- the grinding head according to the invention may advantageously be designed such that the plane surface between the retainer grooves for the edge profile parts of the abrasive paper members is designed with radial suction apertures, and that the grinding head includes an enclosing housing which is provided along its periphery with an annular lip seal.
- the grinding head according to the invention may further suitably be designed such that the lip seal is constituted by brushes made of an electrically conducting material, e.g. carbon fibre brushes.
- the lip seal is constituted by brushes made of an electrically conducting material, e.g. carbon fibre brushes.
- the grinding head according to the invention is designed so that the support brushes consist of relatively soft brushes of pig's bristles.
- the grinding head according to the invention can be designed so that the support brushes consist of soft horsehair brushes.
- the grinding head according to the invention can be designed so that the support , brushes consist of stiff brushes of Tampico fibres. It will furthermore be possible, with the object of optimisation for specific tasks, that the support brushes consist of a suitable mixture of pig's bristles, horsehair and Tampico fibres.
- Fig. 1 shows a plan view of a prior art abrading disc
- Fig. 2 shows a plan view in section of the prior art abrasive disc according to Fig. 1 ;
- Fig. 3 shows a plan view of an embodiment of a grinding head according to the invention, as shown during grinding of a plate item;
- Fig. 4 shows a perspective view of the grinding head according to the invention shown in Fig. 3 for illustrating an oblique angular position of the abrasive paper members;
- Fig. 5 shows a perspective view of the grinding head according to the invention shown in Fig. 3 for illustrating an angular displacement relative to radial of the abrasive ' paper members
- Fig. 6 shows a plan view of a prior art cylindrical grinding head with longitudinal retainer grooves for radial abrasive paper members
- Fig. 7 shows a plan view in detail of the grinding head shown in Fig. 6;
- Fig. 8 shows a perspective view of an embodiment of a cylindrical grinding head according to the invention where the abrasive paper members are angled forward in the direction of rotation relative to a tangent plane of cylindrical surface of the grinding head;
- Fig. 9 shows a perspective view in detail of the grinding head shown in Fig. 8.
- Fig. 10 shows a perspective view of a modified embodiment of a grinding head according to the invention where the plane grinding head includes an enclosing housing which is provided along its periphery with an annular lip seal; and
- Fig. 1 1 shows a perspective view of the grinding head shown in Fig. 10, as seen from its outer side.
- Fig. 1 shows a prior art grinding head 1 e.g. as in EP 1 633 530 Bl , having a surface 2 to which a number of abrasive paper members 3 are fastened, and having a radial extension across the greater part of the surface 2. Behind each abrasive paper member 3, the grinding disc 1 is provided with a row of support brushes 4.
- the number of abrasive paper members 3 and support brushes 4 can be arbitrary.
- a grinding head 1 there are eight radial abrasive paper members with associated single rows of support brushes 4.
- Fig. 2 shows the prior art grinding head 1 with two abrasive paper members 3 which are slit such that the abrasive paper members 3 are divided into a number of abrading strips 5.
- the abrasive paper members 3 are fastened in a surface of the grinding head 1.
- the surface 2 has increasing height inwards from its periphery 6. Behind the abrasive paper members 3, support brushes 4 are provided, with uniform height such that the polishing pressure becomes uniform in height.
- Figs. 3-5 show a preferred embodiment of a grinding head according to the invention where the grinding head 1 ' in Fig. 3 during rotation is moved towards the right side of the drawing, along an outer side edge 9 of a plate-shaped item 10 to be abraded.
- Fig. 4 illustrates that the abrasive paper members 3 with associated support brushes 4 are mounted in retainer grooves 12 in the grinding head 1 ' at an oblique angle 7 of 20- 40°, preferably about 30°, directed forward in the direction of rotation of a plane surface 2'. It is to be mentioned that the oblique angle 7 is measured in relation to a generatrix 1 1 standing perpendicularly to the periphery of the grinding head 1 ' .
- Fig. 5 illustrates that that the retainer grooves 12 for the edge profile parts 14 of the abrasive paper members 3 extend obliquely rearwards in the direction of rotation of the plane surface 2' at an angle 8 of 3-10° relative to a radial extension, i.e.
- Fig. 6 shows a prior art cylindrical grinding head 19 e.g. as in EP 1 509 365 Bl , having longitudinal retainer grooves 20 for receiving edge profile parts 21 of abrasive paper members 3 with associated support brushes 4, whereas Fig. 7 shows a detail view of retainer grooves 20 and edge profile parts 21 , respectively, for reception in retainer grooves 20.
- Fig. 8 shows a modified embodiment of a grinding head 1 ' with a large number of retainer grooves 12 for edge profile parts 14, where the retainer grooves 12 have an inclined orientation of 20-40°, preferably about 30°, forward in the direction of rotation as well as the retainer grooves 12 for the edge profile parts 14 of the abrasive paper members 3 extend obliquely rearwards in the direction of rotation of the cylindrical surface 13 at an angle of 3-10° relative to the tangent plane of the cylindrical surface 13.
- 10 and 1 1 show a grinding head 1 " with a plane surface 2' which between the retainer grooves 12 for the abrasive paper members 3 and the support brushes 4, respectively, is designed with radial suction apertures 15, and which includes an enclosing housing 16 which is provided along its periphery with an annular lip seal 17 and an external suction branch 22. This is intended for connection with a hose for a suction cleaner or a central suction system.
- the lip seal 7 is constituted by brushes that are made of an electrically conducting material, e.g. carbon fibre brushes 18, such that static electricity can be earthed thereby via the carbon fibre brushes 17, of course on the condition that the grinding head 1 ' ' with the carbon fibre brushes 17 as such is provided with a potential equalisation connection (earth connection).
- an electrically conducting material e.g. carbon fibre brushes 18, such that static electricity can be earthed thereby via the carbon fibre brushes 17, of course on the condition that the grinding head 1 ' ' with the carbon fibre brushes 17 as such is provided with a potential equalisation connection (earth connection).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12792057T PL2714334T3 (en) | 2011-05-27 | 2012-05-25 | Grinding head |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA201170265A DK177274B1 (en) | 2011-05-27 | 2011-05-27 | Grinding head |
PCT/DK2012/050181 WO2012163357A1 (en) | 2011-05-27 | 2012-05-25 | Grinding head |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2714334A1 true EP2714334A1 (en) | 2014-04-09 |
EP2714334A4 EP2714334A4 (en) | 2014-11-26 |
EP2714334B1 EP2714334B1 (en) | 2021-03-03 |
Family
ID=46766642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12792057.7A Active EP2714334B1 (en) | 2011-05-27 | 2012-05-25 | Grinding head |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140106651A1 (en) |
EP (1) | EP2714334B1 (en) |
CA (1) | CA2835996A1 (en) |
DK (1) | DK177274B1 (en) |
PL (1) | PL2714334T3 (en) |
WO (1) | WO2012163357A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK177694B1 (en) * | 2012-12-04 | 2014-03-10 | Poul Erik Jespersen Kadicma | Rotary machining tool |
DE202014000852U1 (en) | 2014-01-30 | 2015-01-21 | Kolthoff & Co. | Tool for surface finishing |
CA3028819A1 (en) * | 2016-05-31 | 2017-12-07 | Flex Trim A/S | Tool with tool elements |
CN107855519B (en) * | 2017-11-20 | 2024-03-01 | 贵州大学 | Cylindrical pore wall graphite paper trowelling device |
IT201900018134A1 (en) * | 2019-10-07 | 2021-04-07 | Ditech S R L | TOOL FOR POLISHING CERAMIC AND / OR NATURAL STONES |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1120198A2 (en) * | 2000-01-28 | 2001-08-01 | Werner Blättler | Grinding tool, machine using the same and method using this tool for machining workpieces |
US6422932B1 (en) * | 1999-10-15 | 2002-07-23 | 3M Innovative Properties Company | Integrally molded brush and method for making the same |
DE202004002905U1 (en) * | 2003-09-08 | 2004-04-29 | ProFin Prograssive Finish AG | Tool for processing surfaces, edge areas and contours |
WO2005053902A1 (en) * | 2003-12-08 | 2005-06-16 | Flex Trim A/S | Grinding apparatus |
US20080171495A1 (en) * | 2005-03-07 | 2008-07-17 | Martine Diat | Micro-Sanding Machine With A Sanding Effect By Air Disc-Abrasive |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2819568A (en) * | 1957-04-18 | 1958-01-14 | John N Kasick | Grinding wheel |
CA1193866A (en) * | 1981-10-09 | 1985-09-24 | Warren L. Langstraat | Sanding wheel |
US4783875A (en) * | 1983-07-14 | 1988-11-15 | Cottam Spencer D | Cleaning device |
IT1220123B (en) * | 1987-11-02 | 1990-06-06 | Dyanex Di Bandelli D & Visinti | ROTATING BRUSH FOR SMOOTHING |
CA2128089A1 (en) * | 1992-02-12 | 1993-08-19 | Herbert W. Schnabel | A coated abrasive article containing an electrically conductive backing |
ATE237433T1 (en) * | 1997-12-17 | 2003-05-15 | Botech Ag Ges Fuer Beratung Un | TOOL FOR PROCESSING WORKPIECE SURFACES AND EDGES |
US6179887B1 (en) * | 1999-02-17 | 2001-01-30 | 3M Innovative Properties Company | Method for making an abrasive article and abrasive articles thereof |
GB2349109B (en) * | 1999-04-23 | 2002-09-04 | Elliott Ind Ltd | Improvements in or relating to abrasive flap discs |
US6551181B2 (en) * | 2001-08-31 | 2003-04-22 | Ewha Diamond Ind. Co., Ltd. | Abrasive wheel |
US6869349B2 (en) * | 2002-10-10 | 2005-03-22 | Slipcon Holding International Aps | Abrading machine with abrading discs, which are moved in a reciprocatory movement transverse to an item |
DK176743B1 (en) * | 2003-04-25 | 2009-06-02 | Flex Trim As | Sanding disc with sandpaper blanks |
DK177957B1 (en) * | 2003-05-23 | 2015-02-02 | Poul Erik Jespersen | Grinding element with a grinding paper mounting means |
DE20312499U1 (en) * | 2003-08-11 | 2004-12-16 | Ufi Schleiftechnik Gmbh & Co. Kg | Sanding disc for grinding machine |
US7014543B1 (en) * | 2003-12-09 | 2006-03-21 | Digital Innovations, Llc | Optical disc resurfacing and buffing apparatus |
KR200350452Y1 (en) * | 2004-01-31 | 2004-05-13 | 태양연마 주식회사 | Back pad of abrasive wheel |
DK200500168U4 (en) * | 2005-07-21 | 2006-03-10 | Flex Trim As | profile List |
JP4942409B2 (en) * | 2006-07-07 | 2012-05-30 | 優一郎 新崎 | Brush hair |
US7690970B2 (en) * | 2007-01-19 | 2010-04-06 | Epoxy-Tech, Inc. | Abrasive preparation device with an improved abrasion element assembly |
JP5306619B2 (en) * | 2007-09-06 | 2013-10-02 | スリーエム イノベイティブ プロパティズ カンパニー | Linear polishing brush member, method for manufacturing linear polishing brush member, and polishing brush |
DE102008055797A1 (en) * | 2008-11-04 | 2010-05-06 | Kai Roscher | grinding machine |
DE202014000852U1 (en) * | 2014-01-30 | 2015-01-21 | Kolthoff & Co. | Tool for surface finishing |
-
2011
- 2011-05-27 DK DKPA201170265A patent/DK177274B1/en active
-
2012
- 2012-05-25 US US14/122,251 patent/US20140106651A1/en not_active Abandoned
- 2012-05-25 CA CA2835996A patent/CA2835996A1/en not_active Abandoned
- 2012-05-25 EP EP12792057.7A patent/EP2714334B1/en active Active
- 2012-05-25 PL PL12792057T patent/PL2714334T3/en unknown
- 2012-05-25 WO PCT/DK2012/050181 patent/WO2012163357A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6422932B1 (en) * | 1999-10-15 | 2002-07-23 | 3M Innovative Properties Company | Integrally molded brush and method for making the same |
EP1120198A2 (en) * | 2000-01-28 | 2001-08-01 | Werner Blättler | Grinding tool, machine using the same and method using this tool for machining workpieces |
DE202004002905U1 (en) * | 2003-09-08 | 2004-04-29 | ProFin Prograssive Finish AG | Tool for processing surfaces, edge areas and contours |
WO2005053902A1 (en) * | 2003-12-08 | 2005-06-16 | Flex Trim A/S | Grinding apparatus |
US20080171495A1 (en) * | 2005-03-07 | 2008-07-17 | Martine Diat | Micro-Sanding Machine With A Sanding Effect By Air Disc-Abrasive |
Non-Patent Citations (1)
Title |
---|
See also references of WO2012163357A1 * |
Also Published As
Publication number | Publication date |
---|---|
NZ617988A (en) | 2015-04-24 |
CA2835996A1 (en) | 2012-12-06 |
PL2714334T3 (en) | 2021-10-25 |
US20140106651A1 (en) | 2014-04-17 |
DK177274B1 (en) | 2012-09-10 |
WO2012163357A1 (en) | 2012-12-06 |
EP2714334B1 (en) | 2021-03-03 |
EP2714334A4 (en) | 2014-11-26 |
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