US3791367A - Tool for dressing grinding wheels and the like - Google Patents

Tool for dressing grinding wheels and the like Download PDF

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Publication number
US3791367A
US3791367A US00219015A US3791367DA US3791367A US 3791367 A US3791367 A US 3791367A US 00219015 A US00219015 A US 00219015A US 3791367D A US3791367D A US 3791367DA US 3791367 A US3791367 A US 3791367A
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Prior art keywords
matrix
tool
dressing
macles
front face
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Expired - Lifetime
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US00219015A
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English (en)
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R Cirell
N Scardena
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Individual
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Individual
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    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor

Definitions

  • ABSTRACT A tool for dressing and trueing abrasive grinding wheels.
  • the tool includes a matrix in the shape of a rectangular prism formed of fused powdered metal removably held in a holder, and a plurality of diamond macles imbedded in the matrix.
  • the matrix has a rectangular front face with end edges that engage the grinding wheel, the top face being progressively eroded during the dressing operation.
  • the macles are located with their faces perpendicular to the direction of movement of the grinding wheel surface and with one point thereof at an end edge of the front face of the matrix, so that even though the matrix and macles are eroded during the dressing operation, a diamond point is always maintained at each end edge of the front face.
  • a further object is to improve the quality and consistancy of dressing and trueing operations on abrasive grinding wheels by a matrix-type diamond dressing tool head.
  • the novel dressing tool construction of the present invention wherein the tool includes a novel cutting block or matrix carried by a tool support for traversing movement while in cutting engagement with the grinding face of an abrasive wheel.
  • the matrix is a solid block generally in the shape of a rectangular prism with a wheel-engaging front face, parallel top and bottom faces parallel to the wheel axis and parallel end faces perpendicular to the wheel axis. It is conventionally formed of heat fused comminuted metal according to conventional powdered metallurgy practices.
  • macles are imbedded adjacent both end faces of the matrix so that both end edges of the front face have diamond cutting points to contact the wheel surface regardless of the contour of the dressing wheel and regardless of the direction of traverse of the tool laterally across the surface of the wheel.
  • FIG. 1 is a perspective view on an enlarged scale (about three times actual size) of a portion of a dressing tool embodying the invention
  • FIG. 2 is a fragmentary side elevation on a reduced scale of an abrasive grinding wheel being dressed and trued by the dressing tool of FIG. 1;
  • FIG. 3 is a fragmentary plan view of the grinding wheel and dressing tool of FIG. 2;
  • FIG. 4 is a fragmentary sectional view on an enlarged scale taken on the line 4-4 of FIG. 2;
  • FIG. 5 is a fragmentary sectional view similar to FIG. 4 illustrating the condition of the tool after the head has been eroded by a number of dressing operations;
  • FIG. 6 is a sectional view taken on the line 6-6 of FIG. 4;
  • FIG. 7 is an exploded perspective view on an enlarged scale illustrating the construction of the tool head or matrix embodying the invention.
  • FIG. 8 is an elevational view on an enlarged scale of a modified form of dressing tool embodying the invention, the tool holder being shown in dashed lines.
  • FIGS. 13 there is shown a diamond headed dressing tool 10 adapted for dressing and trueing an abrasive grinding wheel 11 having a contoured grinding surface.
  • the tool 10 is adapted to traverse back and forth laterally in a direction parallel to the axis of the wheel and in view of the contour of the grinding face of the wheel as illustrated in FIG. 3, the too] must be moved endwise toward and away from the wheel in order that the tool head may follow the contour of the wheel.
  • the tool includes a bifurcated holder 12 adapted to receive and retain a tool head or matrix 13 which is conventionally soldered in place between the bifurcations 14.
  • the matrix 13 comprises comminuted metal particles of iron or other suitable metal heat fused under pressure according to practices known in the art to form a solid block.
  • the block is in the form of a rectangular prism with a work engaging front face 15, top and bottom faces 16 and end faces 17.
  • Embedded within the matrix 13 are six diamond macles 18 which are twin diamond crystals that are found in nature and which generally have a triangular form,
  • Macles occur in many different sizes ranging from about 1 4: karat to as small as l5 stones per karat. In accordance with the invention at least two macles are imbedded in the matrix.
  • the unique advantages of the invention are achieved by the manner of positioning the macles 18 within the matrix 13 all of which is accomplished during the forming and fusing of the powdered metal.
  • the positioning of the macles 18 is best illustrated in FIGS. 4-7 and it will be seen that the faces thereof are all in planes parallel to the top and bottom faces 16.
  • Three of the macles are positioned adjacent each end face 17 of the matrix 13' and one side thereof is located in the respective end face 17 with one point thereof at the respective end edge of the front face or cutting face 15.
  • the three macles on each side are preferably uniformly spaced and the macles at one end face are each spaced between adjacent macles on the opposite end face as best illustrated in FIG. 6.
  • the height of the triangular macles is greater than half the side dimension of the matrix so that the interior points overlap one another. With this arrangement six diamond points are always provided at the end edges of the cutting face 15.
  • FIG. 5 illustrates the unique advantages obtained with the dressing tool construction of the invention, particularly in connection with the condition of the matrix after substantial erosion of the front face has occurred due to a considerable period of dressing, all of which serves to progressively and continuously remove material from the matrix.
  • the erosion flattens out the respective points that initially lie in the front face 15 so that the macles take on a quadlilateral form, a diamond point is still located at each end corner or edge of the front face 15. These points will engage and cut the abrasive material of the grinding wheel 11 during the left-to-right and right-toleft traversing of the tool during the dressing operation so that a diamond will be continuously exposed.
  • FIG. 8 illustrates a modified form of the invention wherein a dressing tool 20 having a holder 21. and a fused metal matrix 22 is provided with ten macles including six macles 23 positioned with one point thereof in the cutting surface and four macles 24 in a position with their uppermost points spaced below the initial cutting surface so that their points will not be exposed until substantial erosion of the cutting face has taken place.
  • Many other configurations or relative locations of macles in the matrix may be employed depending upon the particular application.
  • the principal consideration according to the invention is that macles be positioned with one point initially in the cutting surface at opposite ends of the cutting face and located with one side edge in the end face so that a diamond point is continuously exposed to the abrasive material during dressing throughout the life of the matrix.
  • the erosion of up to 50 percent of the overall depth of the matrix can be accoi'nmodat ed before the matrix need be replaced.
  • a dressing tool adapted to traverse across the face of a rotating abrasive grinding wheel, the tool including a holder that supports a solid matrix having a wheel-engaging front face with end edges perpendicular to the direction of traverse, top and bottom faces generally parallel to the direction of traverse, and end faces generally perpendicular to the direction of traverse, the improvement which comprises:
  • said macles comprising natural diamonds in the form of thin, flat triangular crystals with two parallel triangular planar faces and three narrow side edges that meet at the corners to define points, said macles being mounted in said matrix with their planar faces generally parallel to said top and bottom faces of said matrix, with one side edge of each macle in one of said end faces of said matrix and with one point in said front face at one of said end edges of said front face,
  • said macles each continuously have a point in the respective end edge defined at the intersection of said front face and the respective end face.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US00219015A 1972-01-19 1972-01-19 Tool for dressing grinding wheels and the like Expired - Lifetime US3791367A (en)

Applications Claiming Priority (1)

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US21901572A 1972-01-19 1972-01-19

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US3791367A true US3791367A (en) 1974-02-12

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US00219015A Expired - Lifetime US3791367A (en) 1972-01-19 1972-01-19 Tool for dressing grinding wheels and the like

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US (1) US3791367A (enrdf_load_stackoverflow)
JP (1) JPS4912491A (enrdf_load_stackoverflow)
AU (1) AU5118573A (enrdf_load_stackoverflow)
BE (1) BE794337A (enrdf_load_stackoverflow)
BR (1) BR7300411D0 (enrdf_load_stackoverflow)
DE (1) DE2302656A1 (enrdf_load_stackoverflow)
FR (1) FR2174547A5 (enrdf_load_stackoverflow)
IT (1) IT978237B (enrdf_load_stackoverflow)
NL (1) NL7300513A (enrdf_load_stackoverflow)
SE (1) SE7300712L (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4685440A (en) * 1986-02-24 1987-08-11 Wheel Trueing Tool Company Rotary dressing tool
US4726718A (en) * 1984-03-26 1988-02-23 Eastman Christensen Co. Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
US6561879B2 (en) * 2000-10-23 2003-05-13 Wendt Gmbh Conditioning device for grinding wheels
EP2853347A3 (de) * 2013-07-09 2015-11-04 Jakob Lach GmbH & Co. KG Abrichtwerkzeug und Verfahren zum Herstellen eines solchen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564946B2 (enrdf_load_stackoverflow) * 1974-09-24 1981-02-02
JPS52105397A (en) * 1976-02-28 1977-09-03 Toyoda Van Moppes Ltd Bladeeshaped multiistone diamond dresser
DE19848835A1 (de) 1998-10-22 2000-04-27 W W Fischer Sa Apples Mehrpolige Steckverbindung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US90824A (en) * 1869-06-01 John dickinson
US2347280A (en) * 1941-07-12 1944-04-25 Wheel Trueing Tool Co Diamond dressing tool and method of determining diamond sizes therefor
US2545676A (en) * 1948-06-03 1951-03-20 Service Diamond Tool Company Diamond impregnated dressing tool
US3378000A (en) * 1965-01-11 1968-04-16 Flory M. Day Wheel dresser
US3596649A (en) * 1968-04-04 1971-08-03 J K Smit & Sons Inc Abrasive tool and process of manufacture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US90824A (en) * 1869-06-01 John dickinson
US2347280A (en) * 1941-07-12 1944-04-25 Wheel Trueing Tool Co Diamond dressing tool and method of determining diamond sizes therefor
US2545676A (en) * 1948-06-03 1951-03-20 Service Diamond Tool Company Diamond impregnated dressing tool
US3378000A (en) * 1965-01-11 1968-04-16 Flory M. Day Wheel dresser
US3596649A (en) * 1968-04-04 1971-08-03 J K Smit & Sons Inc Abrasive tool and process of manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Long, Albert and Slawson, Bureau of Mines Report of Investigation 4853, Diamond Orientation in Diamond Bits , Feb. 1952 page 6 and FIG. 11. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726718A (en) * 1984-03-26 1988-02-23 Eastman Christensen Co. Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
US4685440A (en) * 1986-02-24 1987-08-11 Wheel Trueing Tool Company Rotary dressing tool
US6561879B2 (en) * 2000-10-23 2003-05-13 Wendt Gmbh Conditioning device for grinding wheels
EP2853347A3 (de) * 2013-07-09 2015-11-04 Jakob Lach GmbH & Co. KG Abrichtwerkzeug und Verfahren zum Herstellen eines solchen

Also Published As

Publication number Publication date
SE7300712L (enrdf_load_stackoverflow) 1973-07-20
NL7300513A (enrdf_load_stackoverflow) 1973-07-23
IT978237B (it) 1974-09-20
BE794337A (fr) 1973-05-16
DE2302656A1 (de) 1973-07-26
FR2174547A5 (enrdf_load_stackoverflow) 1973-10-12
BR7300411D0 (pt) 1973-09-25
AU5118573A (en) 1974-07-18
JPS4912491A (enrdf_load_stackoverflow) 1974-02-02

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