EP0144468A1 - Schleifscheiben mit erneuerbarer Zahnung - Google Patents

Schleifscheiben mit erneuerbarer Zahnung Download PDF

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Publication number
EP0144468A1
EP0144468A1 EP83201716A EP83201716A EP0144468A1 EP 0144468 A1 EP0144468 A1 EP 0144468A1 EP 83201716 A EP83201716 A EP 83201716A EP 83201716 A EP83201716 A EP 83201716A EP 0144468 A1 EP0144468 A1 EP 0144468A1
Authority
EP
European Patent Office
Prior art keywords
toothing
renewable
disk
grinding
grinding wheels
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Withdrawn
Application number
EP83201716A
Other languages
English (en)
French (fr)
Inventor
Mario Bruno
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.)
Costa Giulio
Original Assignee
Costa Giulio
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 Costa Giulio filed Critical Costa Giulio
Publication of EP0144468A1 publication Critical patent/EP0144468A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/02—Wheels in one piece
    • 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
    • B24D7/02—Wheels in one piece
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades

Definitions

  • the present invention relates to grinding wheels with renewable toothing.
  • the essential problem in grinding wheels is that of keeping their active surface efficient as long as possible, which, where possible, is regularly effected by dressing by means of a diamond point.
  • Said dressing of the abrasive grain by means of a diamond point wears the grinding wheel and above all causes said grinding wheel to have on the surface of the workpiece abrasive surfaces that are anything but homogeneous, namely with a sharp grain immediately after the passage of the diamond and a blunt grain at the end of the operation.
  • the fundamental feature of the present invention consists in that normal grinding wheels, which may be cylindrical, provided with a simple and double recess, in disk shape, in simple and double, cylindrical and conical cup shape, with a depressed center, annular, segmental etc., have on their abrasive surface a plurality of projections and/or recesses of the rib and/or cavity type, of various shape, distributed on said abrasive surfaces radially or at appropriate angles according to the type of grinding wheel and the purpose thereof; said plurality of projections and/ or recesses, ribs and/or cavities, as the case may be, constituting a "renewable toothing" over the entire length ' of the useful portion of the grinding wheel until it is worn out.
  • the present grinding wheels are disk-shaped with a depressed center, of the cutting and/or deburring type, for tangential or round grinding, characterized in that said grinding wheels have on their active surface a plurality of projections of the rib or toothing type, having an inclination opposed to the direction of rotation of the disk-shaped grinding wheel, arranged along angularly spaced radii so as to constitute a "renewable toothing" in the sense that, starting from the outside, as the diameter diminishes due to wear of the disk, always new toothings suitable for the purpose are formed, which toothings in fact are formed by said ribs, and so on until the useful portion of the tool is completely worn out.
  • the disk-shaped grinding wheels with depressed center, of the cutting and/or deburring type, for tangential and round grinding are characterized in that they have on their active surface a plurality of projections of the rib or toothing type, arranged radially and angularly spaced so as to constitute a "renewable toothing" analogous to the one described in the preceding feature and efficient until the useful portion of the grinding wheel is completely worn out.
  • the disk-shaped grinding wheels of the cutting and/or deburring type for tangential and round grinding, have on their active surface a plurality of recesses of various shapes, of the through type or not, distributed on said active surfaces on different arcs of radii appropriately spaced along said arcs of circle and spaced along the radii of said arcs; said recesses being provided with appropriate angles relative to the center of the grinding wheel, of appropriate pitch along said radii, of appropriate width and frequency along said arcs of circle, according to the type of disk-shaped grinding wheel to be produced; said appropriately arranged recesses or slots constituting a "renewable toothing" in the sense that when a series of slots along a circumference of a given radius has come to an end, another series is automatically formed along another circumference of smaller radius and so on until the grinding wheel is worn out.
  • the present disk-shaped grinding wheels are disk-shaped grinding wheels whose recesses are constituted by substantially rectangular slots arranged to extend through the entire active surface of the grinding wheel along angularly spaced radii and spaced along said radii from the center to the periphery and offset relative to one another in said radii so as to constitute a "renewable toothing" in the sense that, as mentioned before, once the slots appertaining to the first outer circle have come to an end or are about to come to an end because of wear of the disk, the slots adapted for the purpose and appertaining to the second circle present themselves by coming to the outside, and so on, until the disk is worn out; said alternation of slots ready for use on the active surface of the disk constituting the so-called "renewable toothing" as mentioned above.
  • the present grinding wheels are disk-shaped grinding wheels whose recesses are constituted by substantially rectangular slots that are no through slots but arranged in alternate or opposed fashion on both faces of the grinding wheels, again according to different arcs of circle on radii offset at different angles relative to one another on the active surface of the disk; the "renewable toothing" being thus formed both among the slots of one face and the slots of the opposed face.
  • the present disk-shaped grinding'wheels have on their active surface, instead of slots that are through slots or not, a plurality of grooves that are no through grooves and are arranged in opposed or alternate fashion on both faces bf said active surface and have an inclination and, if desired, curvature from the center to the periphery of the disk, opposed to the direction of rotation of the disk; the "renewable toothing" being formed in this embodiment, as in the others in which the active surface is substantially frontal, by the continuous renewal of the profile of the grooves in the sense that the worn portion of said groove is replaced by a new portion thereof until the grinding wheel is worn out.
  • a further feature of the present invention consists in that the present grinding wheels are .disk-shaped grinding wheels of the type for cylindrical external grinding, cylindrical internal grinding, tangential grinding, characterized in that said grinding wheels are substantially disk-shaped grinding wheels carrying on both parallel and opposed plane faces a plurality of projections of the rib or toothing type, arranged in alternate or opposed fashion on both faces of the plane abrasive surface radially or at a negative angular inclination relative to the direction of rotation of the disk, said projections being angularly spaced and of appropriate length substantially corresponding to the useful area of the grinding wheel so as to constitute a "renewable toothing" over the entire length of the useful portion of the tool.
  • a further fundamental feature of the present invention consists in that the present grinding wheels are cup-shaped grinding wheels having a simple and/or double, cylindrical and/or conical cup, characterized in that said grinding wheels carry on the abrasive surface of their jacket a plurality of projections of the rib type, arranged normal or at an angle to the surface to be ground, appropriately spaced from one another, arranged in opposed or alternating fashion on the two walls of the cup, said projections having a length corresponding to the useful length of the grinding wheel so as to constitute a "renewable toothing" effective over the entire useful length of the grinding wheel.
  • the cup-shaped-grinding wheels having a simple or double, cylindrical and/or conical cup are characterized in that they have on one of their (inner or outer) surfaces of the jacket a plurality of rib type projections that are normal or inclined relative to the surface to be ground, as in the preceding feature, so as to constitute a "renewable toothing" only on one, inner or outer, wall of the jacket of the cup, which is effective over the entire length of the useful portion of the grinding wheel.
  • a further fundamental feature of the present invention consists in that the present grinding wheels are segmental grinding wheels, particularly with front segments of the externally and internally radiated, laterally locking type, characterized in that said segmental grinding wheels have on the surface of their jacket a plurality of projections and/or recesses of the rib and/or cavity type, arranged normally or at an angle to the surface to be ground, and appropriately spaced from one another, said projections being of appropriate length relative to the height of the jacket or useful height of the grinding wheel so as to form a "renewable toothing" which is effective over the entire length of the useful portion of the jacket.
  • a further fundamental feature of the present invention consists in that the projections and/or recesses of the rib and/or cavity type, which may be through cavities or not, mentioned in all the preceding types of grinding wheels, whether they are disk-shaped, with a depressed center, cup-shaped, cylindrical, frontal, segmental and the like, have a cross section which is thought most appropriate for each case, said cross sections therefore being semicircular, oval, in the form of an arc of a circle, prismatic, rectangular, triangular, etc., each of said types of cross sections reflecting a regular or irregular plane geometrical figure.
  • Figs. 1 and 2 show disk-shaped grinding wheels having a depressed center 1, in which the projections 3 are made on the front surface of the grinding wheel at angles in a direction opposite to the direction of rotation of the grinding wheel.
  • active surfaces in the present case both the front surface and the edge defined by said front surface and the peripheral surface are to be understood.
  • Figs. 3 and 4 likewise show disk-shaped grinding wheels having a depressed center 5, which, as is known, are used by the corner or edge by generally manual tools; in said type of grinding wheel, the projections are radial and also in this case are located on the front surface and the peripheral surface.
  • Figs. 5 and 6 show disk-shaped grinding wheels having a plurality of incisions or openings both on the front and peripheral surfaces to increase the efficiency of the grinding wheel; said cavities may be of various nature according to the type of grinding wheel to be produced and- the work to be carried out.
  • the openings are formed by through slots 9 made on the peripheral edge 11 and the face 13 of the grinding wheel and arranged along radii of circles at an appropriate pitch, these radii being angularly offset relative to one another at a suitable angle.
  • the pitch of the slots along said radii is the same in all of said radii, but their location is offset from one radiu s to an adjacent one so as to create the so-called “renewable toothing" which consists in that, when a series of slots, for example the outer ones, are worn out, the slots arranged on the circumference immediately therebelow are being prepared for this purpose.
  • the slots 17 are provided at an angle relative to the radius at an appropriate negative angle relative to the direction of rotation of the grinding wheel.
  • the slots 17 are opposed on both faces 13.
  • the cavities provided on the faces 13 of the grinding wheel substantially are straight grooves 19 which are negatively inclined relative to the direction of rotation of the grinding wheel.
  • Fig. 15 shows another embodiment of a disk-shaped grinding wheel according to the invention and more particularly a disk-shaped grinding wheel in which the openings 23 are opposed; said removals are effected on either face of the grinding wheel in alternate relation so as to provide a grinding wheel having a zigzag cutting profile. Said profile is shown in Fig. 16.
  • the thickness of the grinding wheel is smaller than the thickness of the grinding wheel of which it was made, but said zigzag shape increases the active surface of the grinding wheel due to the inclination of the walls and said inclination increases the efficiency thereof by thrust action.
  • Figs. 17 and 18 show a flat disk-shaped grinding wheel 25 on the front surfaces of which the projections 27 are provided.
  • Said projections 27 are provided on both sides of the present grinding wheel 25 and by "active surfaces” obviously both the front surfaces and the edge defined by said front surfaces and the peripheral cylindrical surface 29 are to be understood.
  • wear of the grinding wheel means wear of the peripheral surface 29 and of the front surfaces extending normally thereto; the "renewable toothing" presents itself suitable for the purpose as said active surface or said active surfaces wear out.
  • Figs. 19 and 20 show a disk-shaped cylindrical grinding wheel 31 analogous to the grinding wheel shown in Figs. 17 and 18, but of greater diameter; said grinding wheel is likewise provided with appropriate projections 32 on the plane faces normal to the cylindrical surface; said projections and the cylindrical surface 33 constitute the "active edge” so that when the grinding wheel works in the cylindrical sense, i.e. with the cylindrical surface 33, the projections 32 constitute the "renewable toothing" of said grinding wheel as it wears out.
  • the working surface is not only the plane surface 49, but often also involves the edge, so that said edge also forms part of the active surface of the grinding wheel and the projections provided on said outer wall constitute the "renewable toothing" mentioned previously.
  • Figs. 27 and 28 show a cylindrical double cup-shaped grinding wheel 51 in which the projections 53 are provided on both cups on the outer cylindrical wall of the cup 51.
  • Figs. 29 and 30 show an annular grinding wheel 55 on which the projections 57 are provided on the cylindrical surface thereof, the "active edge" and the renewable toothing being thus constituted by the plane surface 59 and the projection 57 normal thereto.
  • Figs. 31 and 32 show a segment 61 of a segmental grinding wheel in which the projections 63 are provided in the direction indicated in the F.igure, the length of said projections being limited to permit easier gripping of the segment by the mechanical fixing members.
  • Figs. 33 and 34 show another type of segment 65 of a segmental grinding wheel wherein there are provided projections'67 having a plane top, or cavities ' 69 provided on the outer cylindrical surface.
  • the projections provided on the abrasive surfaces of said grinding wheels herein described are in the form of cylindrical, oval, prismatic, rectangular, triangular and the like protuberances, i.e. each type of said protuberances may have the cross section of a regular or irregular plane geometric figure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP83201716A 1983-10-31 1983-12-05 Schleifscheiben mit erneuerbarer Zahnung Withdrawn EP0144468A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT68135/83A IT1162977B (it) 1983-10-31 1983-10-31 Mole abrasive a dentatura rinnovabile
IT6813583 1983-10-31

Publications (1)

Publication Number Publication Date
EP0144468A1 true EP0144468A1 (de) 1985-06-19

Family

ID=11308086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201716A Withdrawn EP0144468A1 (de) 1983-10-31 1983-12-05 Schleifscheiben mit erneuerbarer Zahnung

Country Status (2)

Country Link
EP (1) EP0144468A1 (de)
IT (1) IT1162977B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803334A3 (de) * 1996-04-26 1998-06-10 Indunorm Hydraulik GmbH Kreismesser
US7195549B2 (en) 2004-08-23 2007-03-27 Saint-Gobain Abrasives, Inc. Drum grinding wheel
CN105690282A (zh) * 2016-04-22 2016-06-22 丹阳市剑庐工具有限公司 一种环形分齿磨轮及其制备工艺
WO2020058788A1 (en) * 2018-09-21 2020-03-26 Aspi Sp. Z O.O. Sp. K. Circular saw blade with a grooved body and method of making the same
US11612946B2 (en) * 2020-02-12 2023-03-28 Baron Investments, Llc Blade assembly with ventilation openings
EP4360805A1 (de) * 2022-10-24 2024-05-01 Gühring KG Schleifscheibe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108000344A (zh) * 2017-12-06 2018-05-08 浙江工业大学 用于线性液动压抛光装置的带抛物线形沟槽的抛光辊子

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR963496A (de) * 1950-07-11
US2755601A (en) * 1953-09-30 1956-07-24 Lux Hans Gunther Grinding apparatus
US3657845A (en) * 1969-06-14 1972-04-25 Shinji Sekiya Resinoid pocketed cutoff and grinding wheel and method of making same
GB1511346A (en) * 1974-05-28 1978-05-17 Engelhard Min & Chem Abrasive tool for grindling and polishing purposes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR963496A (de) * 1950-07-11
US2755601A (en) * 1953-09-30 1956-07-24 Lux Hans Gunther Grinding apparatus
US3657845A (en) * 1969-06-14 1972-04-25 Shinji Sekiya Resinoid pocketed cutoff and grinding wheel and method of making same
GB1511346A (en) * 1974-05-28 1978-05-17 Engelhard Min & Chem Abrasive tool for grindling and polishing purposes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803334A3 (de) * 1996-04-26 1998-06-10 Indunorm Hydraulik GmbH Kreismesser
US7195549B2 (en) 2004-08-23 2007-03-27 Saint-Gobain Abrasives, Inc. Drum grinding wheel
CN105690282A (zh) * 2016-04-22 2016-06-22 丹阳市剑庐工具有限公司 一种环形分齿磨轮及其制备工艺
CN105690282B (zh) * 2016-04-22 2018-11-02 丹阳市剑庐工具有限公司 一种环形分齿磨轮及其制备工艺
WO2020058788A1 (en) * 2018-09-21 2020-03-26 Aspi Sp. Z O.O. Sp. K. Circular saw blade with a grooved body and method of making the same
US11612946B2 (en) * 2020-02-12 2023-03-28 Baron Investments, Llc Blade assembly with ventilation openings
US12179277B2 (en) 2020-02-12 2024-12-31 Baron Investments, Llc Blade assembly with ventilation openings
EP4360805A1 (de) * 2022-10-24 2024-05-01 Gühring KG Schleifscheibe

Also Published As

Publication number Publication date
IT8368135A0 (it) 1983-10-31
IT8368135A1 (it) 1985-05-01
IT1162977B (it) 1987-04-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: BRUNO, MARIO