EP1661666B1 - Holder plate supporting grinding elements - Google Patents
Holder plate supporting grinding elements Download PDFInfo
- Publication number
- EP1661666B1 EP1661666B1 EP05111313A EP05111313A EP1661666B1 EP 1661666 B1 EP1661666 B1 EP 1661666B1 EP 05111313 A EP05111313 A EP 05111313A EP 05111313 A EP05111313 A EP 05111313A EP 1661666 B1 EP1661666 B1 EP 1661666B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- holder plate
- plate
- grinding elements
- substantially parallel
- 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.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
- B24D7/066—Grinding blocks; their mountings or supports
-
- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
-
- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
Definitions
- the present invention relates to a holder plate supporting grinding elements for grinding and/or polishing of hard floor surfaces such as stone, concrete, terrazzo or similar.
- Holder plates supporting grinding elements are known from EP-1 321 233 or from PCT/SE2004/000905 .
- a multiplicity, normally at least three, such holder plates supporting grinding elements are mounted on a driven grinding plate ( Fig. 2 ) that rotates flat, substantially parallel with the floor surface, which plate is in turn mounted in a grinding machine of for example the type shown in WO02/062524 or EP-0 700 327 .
- the grinding plate with the holder plate with grinding elements mounted is thus brought into contact with the floor surface, where the grinding plate is rotated and the floor surface ground and/or polished.
- At least two circular or rectangular grinding elements are arranged on the holder plate.
- the one grinding element is normally arranged substantially parallel with the tangent of the grinding plate and the other grinding element is normally set at an angle to the first as illustrated in Fig. 1 .
- This known arrangement of grinding elements is motivated by a desire to drive the removed material out towards the periphery of the grinding plate.
- One object of the present invention is to achieve an improved or alternative holder plate supporting grinding elements.
- a holder plate supporting grinding elements is achieved for grinding and/or polishing of hard floor surfaces of stone, concrete, terrazzo or similar.
- the holder plate has an element adapted for mounting this on a driven grinding plate that rotates flat, substantially parallel to the floor surface.
- the grinding plate supports at least two grinding elements, where each of the grinding elements has the form of a geometric body which is defined by two substantially parallel base surfaces spaced apart from each other and at least one side surface extending between the edges of the base surfaces.
- the base surfaces are substantially parallel with the holder plate and substantially oblong.
- the grinding elements are arranged on the holder plate so that the holder plate is mountable on the grinding plate such that a longitudinal direction of the base surface concerned is substantially parallel with a tangent of the grinding plate located at the grinding elements .
- the grinding elements are spaced from all peripheral edges of the holder plate.
- grinding element refers to an element with a grinding and/or polishing effect.
- Such elements can comprise a matrix of metal or plastics resin which contain grinding particles of any size and any material, for example a grinding agent such as PCD and/or diamond.
- the term "for grinding and/or polishing” here refers to a holder plate with only a grinding and/or polishing element and hence not holder plates which have one or more cutting edges for cutting of floor surfaces.
- the "mounting element” is an arrangement which can be used to attach the holder plate to the grinding disc.
- Examples of such elements can be threaded holes for fastening the holder plate to the grinding disc by means of screws as shown in EP-1 321 233 .
- Another example of such an element can be the surrounding flanges as shown in PCT/SE2004/000905 .
- each of the base surfaces has a longitudinal direction and a transverse direction substantially orthogonal in relation thereto, such that the extent of the base surface is longer in the longitudinal direction than in the transverse direction.
- the grinding elements are thus arranged on the holder plate so that the longitudinal direction of their respective base surfaces is substantially parallel to a tangent on the grinding plate.
- substantially parallel to a tangent includes a degree of angular deviation from the tangent for example so that the longitudinal directions of the grinding elements can be parallel with each other. In practice this can mean a relatively small deviation from the tangent as the grinding plate and in particular its radius is relatively large compared with the grinding elements.
- the grinding element By arranging the grinding element in accordance with the invention, a reduced sensitivity is achieved to removed material located on the floor surface since the grinding element has a smaller area affected by such removed material.
- the holder plate By arranging the grinding element with its longitudinal direction parallel to the tangent, the holder plate itself is made stiffer, reducing the risk of this falling away from the grinding plate when such assembly elements as shown in PCT/SE2004/000905 are used. Also a more even flow of coolant is achieved in applications where coolant is utilised.
- the base surface can taper in a first direction parallel to the tangent.
- the base surface can taper in a second direction opposite the first. By tapering the base surface in the opposite direction, the grinding element can be rotated in either direction i.e. clockwise or counter-clockwise.
- the base surface at its one end in the longitudinal direction has a tip pointing in the longitudinal direction. Because the base surface has a tip, an improved scraping effect is achieved which is advantageous when for example paint residue or similar remains on and should be removed from the floor surface.
- the base surface is rounded at its one end in the longitudinal direction. Because the base surface is rounded there is less risk that scratches will occur on the floor surface.
- Fig. 1 shows a known holder plate 1 supporting grinding elements which is fitted with two grinding elements 2a, 2b arranged in the traditional manner.
- Fig. 2 shows a known grinding plate 3 on which are arranged three holder plates 1 supporting grinding elements. It can be seen that the number of holder plates 1 arranged on the grinding plate can vary as required. Normal configurations comprise 3-6 holder plates 1.
- Fig. 3 shows a holder plate 1 supporting grinding elements according to the invention.
- On the holder plate 1 are arranged two grinding elements 2a, 2b in such a way that their respective longitudinal direction L is substantially parallel to a tangent on the grinding plate 3 on which the holder plate 1 is to be arranged.
- the angles V 1 and V 2 between the longitudinal directions L 1 , L 2 of the respective grinding elements 2a, 2b, and the radius r of the grinding plate are essentially equally large but they can also deviate slightly from each other for example so that the longitudinal directions L 1 , L 2 of the grinding elements 2a, 2b are parallel to each other.
- the grinding element has the form of a three-dimensional body which is defined by two substantially parallel base surfaces B ( Fig. 5 ) and side surfaces S extending between the opposing edges of the base surfaces ( Fig. 5 ).
- Figs. 4a-4g show for example embodiments of geometries of the base surface.
- the grinding elements can be considered oblong as they have a respective length L which is greater than their respective with t.
- all base surfaces B of the grinding element are substantially similar.
- the base surfaces are substantially of the same size.
- the base surfaces comprise a first base surface located nearest the holder plate and a second base surface located remote from the holder plate, where the first base surface has a larger area than the second.
- the grinding element thus tapers from the holder plate 1 and downwards towards the floor surface to be ground.
- the base surfaces comprise a first base surface located nearest the holder plate and a second base surface located remote from the holder plate, where the first base surface has a smaller area than the second.
- the base surface can taper in a first direction parallel to the tangent but also in a second direction opposite the first.
- the distal end of the base surface in the longitudinal direction L can have a rounding 4.
- the base surface can have a tip 5 pointing in the longitudinal direction.
- the holder plate 1 according to the present invention can be fitted with an arbitrary number of grinding elements for example 1, 2, 3, 4, 5 or 6, depending on requirements and the space available on the holder plate 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
- The present invention relates to a holder plate supporting grinding elements for grinding and/or polishing of hard floor surfaces such as stone, concrete, terrazzo or similar.
- Holder plates supporting grinding elements are known from
EP-1 321 233 or fromPCT/SE2004/000905 Fig. 2 ) that rotates flat, substantially parallel with the floor surface, which plate is in turn mounted in a grinding machine of for example the type shown inWO02/062524 EP-0 700 327 . The grinding plate with the holder plate with grinding elements mounted is thus brought into contact with the floor surface, where the grinding plate is rotated and the floor surface ground and/or polished. - In applications where only grinding and/or polishing grinding elements are used, normally at least two circular or rectangular grinding elements are arranged on the holder plate. With rectangular grinding elements, the one grinding element is normally arranged substantially parallel with the tangent of the grinding plate and the other grinding element is normally set at an angle to the first as illustrated in
Fig. 1 . This known arrangement of grinding elements is motivated by a desire to drive the removed material out towards the periphery of the grinding plate. - One problem with known holder plates for grinding elements is that unevenness and protrusions on the floor surface and removed material located on the floor surface cause varying and sometimes great stresses on the grinding element which can lead to its cracking, crushing or breaking from the holder plate.
-
DE 203 15 207 U1 discloses a holder plate according to the preamble ofclaim 1, wherein the grinding elements are positioned at a peripheral edge of the holder plate. - One object of the present invention is to achieve an improved or alternative holder plate supporting grinding elements.
- This object is achieved with a holder plate supporting grinding elements according to the enclosed independent claim. Embodiments arise from the enclosed dependent claims and from the following description and drawings.
- Thus a holder plate supporting grinding elements is achieved for grinding and/or polishing of hard floor surfaces of stone, concrete, terrazzo or similar. The holder plate has an element adapted for mounting this on a driven grinding plate that rotates flat, substantially parallel to the floor surface. The grinding plate supports at least two grinding elements, where each of the grinding elements has the form of a geometric body which is defined by two substantially parallel base surfaces spaced apart from each other and at least one side surface extending between the edges of the base surfaces. The base surfaces are substantially parallel with the holder plate and substantially oblong. The grinding elements are arranged on the holder plate so that the holder plate is mountable on the grinding plate such that a longitudinal direction of the base surface concerned is substantially parallel with a tangent of the grinding plate located at the grinding elements .
- The grinding elements are spaced from all peripheral edges of the holder plate.
- The term "grinding element" refers to an element with a grinding and/or polishing effect. Such elements can comprise a matrix of metal or plastics resin which contain grinding particles of any size and any material, for example a grinding agent such as PCD and/or diamond.
- The term "for grinding and/or polishing" here refers to a holder plate with only a grinding and/or polishing element and hence not holder plates which have one or more cutting edges for cutting of floor surfaces.
- The "mounting element" is an arrangement which can be used to attach the holder plate to the grinding disc. Examples of such elements can be threaded holes for fastening the holder plate to the grinding disc by means of screws as shown in
EP-1 321 233 . Another example of such an element can be the surrounding flanges as shown inPCT/SE2004/000905 - The reference to the base surfaces being substantially oblong means that each of the base surfaces has a longitudinal direction and a transverse direction substantially orthogonal in relation thereto, such that the extent of the base surface is longer in the longitudinal direction than in the transverse direction. The grinding elements are thus arranged on the holder plate so that the longitudinal direction of their respective base surfaces is substantially parallel to a tangent on the grinding plate.
- The term "substantially parallel to a tangent" includes a degree of angular deviation from the tangent for example so that the longitudinal directions of the grinding elements can be parallel with each other. In practice this can mean a relatively small deviation from the tangent as the grinding plate and in particular its radius is relatively large compared with the grinding elements.
- By arranging the grinding element in accordance with the invention, a reduced sensitivity is achieved to removed material located on the floor surface since the grinding element has a smaller area affected by such removed material. By arranging the grinding element with its longitudinal direction parallel to the tangent, the holder plate itself is made stiffer, reducing the risk of this falling away from the grinding plate when such assembly elements as shown in
PCT/SE2004/000905 - The base surface can taper in a first direction parallel to the tangent. By tapering the base surface in the direction of the tangent, a plough effect is achieved which means that removed material located on the floor surface is eliminated, hence reducing the force which this exerts on the grinding element.
- The base surface can taper in a second direction opposite the first. By tapering the base surface in the opposite direction, the grinding element can be rotated in either direction i.e. clockwise or counter-clockwise.
- According to one embodiment the base surface at its one end in the longitudinal direction has a tip pointing in the longitudinal direction. Because the base surface has a tip, an improved scraping effect is achieved which is advantageous when for example paint residue or similar remains on and should be removed from the floor surface.
- According to another embodiment the base surface is rounded at its one end in the longitudinal direction. Because the base surface is rounded there is less risk that scratches will occur on the floor surface.
- The embodiments will now be described in more detail with reference to the enclosed drawings.
-
-
Fig. 1 shows a diagrammatic plan view of a holder plate supporting grinding elements according to the prior art. -
Fig. 2 shows a diagrammatic plan view of a grinding disc on which are arranged three holder plates according toFig. 1 . -
Fig. 3 shows a diagrammatic plan view of a holder plate supporting a grinding element according to one embodiment of the present invention. -
Figs. 4a-4g show diagrammatic plan views of the grinding element according to alternative embodiments of the present invention -
Fig. 5 is a diagrammatic perspective view of the grinding element inFig. 4a . -
Fig. 1 shows a knownholder plate 1 supporting grinding elements which is fitted with twogrinding elements -
Fig. 2 shows a knowngrinding plate 3 on which are arranged threeholder plates 1 supporting grinding elements. It can be seen that the number ofholder plates 1 arranged on the grinding plate can vary as required. Normal configurations comprise 3-6holder plates 1. -
Fig. 3 shows aholder plate 1 supporting grinding elements according to the invention. On theholder plate 1 are arranged twogrinding elements grinding plate 3 on which theholder plate 1 is to be arranged. According to one embodiment therefore the angles V1 and V2 between the longitudinal directions L1, L2 of therespective grinding elements grinding elements - The grinding element has the form of a three-dimensional body which is defined by two substantially parallel base surfaces B (
Fig. 5 ) and side surfaces S extending between the opposing edges of the base surfaces (Fig. 5 ). -
Figs. 4a-4g show for example embodiments of geometries of the base surface. As shown inFigs. 4a-4g , the grinding elements can be considered oblong as they have a respective length L which is greater than their respective with t. - According to one embodiment all base surfaces B of the grinding element (
Fig. 5 ) are substantially similar. According to a first variant of this embodiment the base surfaces are substantially of the same size. According to a second variant of these embodiments the base surfaces comprise a first base surface located nearest the holder plate and a second base surface located remote from the holder plate, where the first base surface has a larger area than the second. The grinding element thus tapers from theholder plate 1 and downwards towards the floor surface to be ground. According to a third variant of this embodiment the base surfaces comprise a first base surface located nearest the holder plate and a second base surface located remote from the holder plate, where the first base surface has a smaller area than the second. - As shown from
Figs. 4a - 4d and 4f - 4g , the base surface can taper in a first direction parallel to the tangent but also in a second direction opposite the first. - As shown by
Fig. 4b and Fig. 4f , the distal end of the base surface in the longitudinal direction L can have a rounding 4. Alternatively as shown inFigs. 4a and 4c-4d and 4g , the base surface can have atip 5 pointing in the longitudinal direction. - It can be seen that the
holder plate 1 according to the present invention can be fitted with an arbitrary number of grinding elements for example 1, 2, 3, 4, 5 or 6, depending on requirements and the space available on theholder plate 1.
Claims (6)
- Holder plate (1) supporting grinding elements for grinding and/or polishing hard floor surfaces as stone, concrete, terrazzo or similar
which holder plate (1) has an element (6) adapted for mounting the holder plate (1) on a driven grinding plate (3) that rotates flat, substantially parallel with the floor surface,
which holder plate (1) carries at least two grinding elements (2),
where each of the grinding elements (2) has the form of a geometric body defined by two substantially parallel base surfaces (B) spaced apart from each other and at least one side surface (S) extending between the edges of the base surfaces,
where the base surfaces (B) are substantially parallel to the holder plate (1) and
where the base surfaces (B) are substantially oblong, wherein
the grinding elements (2) are arranged on the holder plate (1) so that the holder plate (1) is mountable on the grinding plate (3) such that a longitudinal direction (L) of the base surface concerned is substantially parallel with a tangent (T) of the grinding plate (3) located at the grinding elements (2), characterised in that the grinding elements are spaced from all peripheral edges of the holder plate. - Holder plate (1) according to claim 1, where the base surface (B) tapers in a first direction parallel to the tangent (T).
- Holder plate (1) according to claim 2, where the base surface (B) tapers in a second direction opposite the first.
- Holder plate (1) according to any of the previous claims, where the base surface (B) at its one end in the longitudinal direction has a tip (5) pointing in the longitudinal direction (L).
- Holding plate (1) according to any of claims 1-3, where the base surface (B) is rounded (4) at its one end in the longitudinal direction.
- Holder plate (1) according to any one of the preceding claims, wherein the grinding elements are positioned at different radial distances from a peripheral edge of the holder plate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0402895A SE528596C2 (en) | 2004-11-29 | 2004-11-29 | Abrasive element bearing retaining plate mounted parallel to the abrasive plate key |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1661666A1 EP1661666A1 (en) | 2006-05-31 |
EP1661666B1 true EP1661666B1 (en) | 2008-02-13 |
Family
ID=33538396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05111313A Not-in-force EP1661666B1 (en) | 2004-11-29 | 2005-11-25 | Holder plate supporting grinding elements |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1661666B1 (en) |
CN (1) | CN1781664A (en) |
AT (1) | ATE385878T1 (en) |
DE (1) | DE602005004723T2 (en) |
ES (1) | ES2302137T3 (en) |
SE (1) | SE528596C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012009283U1 (en) * | 2012-09-27 | 2014-01-22 | Heger Gmbh European Diamond Tools | Base disk for a cup grinding wheel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2051618A (en) * | 1934-10-16 | 1936-08-18 | Bridgeport Safety Emery Wheel | Block for sectional grinding wheels |
SE501448C2 (en) | 1992-10-22 | 1995-02-20 | Haakan Thysell | Device for a mobile grinding machine for grinding stone floors |
SE518356C2 (en) | 2001-02-06 | 2002-10-01 | Haakan Thysell | Device for mobile machine for grinding floor surfaces |
DE20120137U1 (en) | 2001-12-12 | 2002-02-28 | Geraetebau Wiedtal Schuetzeich | grinding tool |
SE525501C2 (en) | 2003-06-11 | 2005-03-01 | Htc Sweden Ab | Grinding plate and a grinding element bearing holder plate for removable mounting on a grinding plate |
DE20315207U1 (en) * | 2003-10-01 | 2004-02-26 | H. Riedel & Sohn Gmbh | Turntable for plate grinding or cutting machine has flat top surface and upstanding flange at edge and has holders for inward- facing cutters |
DE102004005627A1 (en) * | 2004-02-04 | 2005-08-25 | Elargo Engineering Gmbh | Grinding device for grinding natural and artificial stone has grinding segments in form of massive grinding bodies with grinding grains and with part of surface in flat plane |
-
2004
- 2004-11-29 SE SE0402895A patent/SE528596C2/en not_active IP Right Cessation
-
2005
- 2005-11-22 CN CN200510126813.6A patent/CN1781664A/en active Pending
- 2005-11-25 AT AT05111313T patent/ATE385878T1/en not_active IP Right Cessation
- 2005-11-25 DE DE602005004723T patent/DE602005004723T2/en active Active
- 2005-11-25 EP EP05111313A patent/EP1661666B1/en not_active Not-in-force
- 2005-11-25 ES ES05111313T patent/ES2302137T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE602005004723T2 (en) | 2009-02-12 |
EP1661666A1 (en) | 2006-05-31 |
DE602005004723D1 (en) | 2008-03-27 |
CN1781664A (en) | 2006-06-07 |
ATE385878T1 (en) | 2008-03-15 |
SE0402895D0 (en) | 2004-11-29 |
SE528596C2 (en) | 2006-12-27 |
SE0402895L (en) | 2006-05-30 |
ES2302137T3 (en) | 2008-07-01 |
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