US2097803A - Grinding wheel - Google Patents

Grinding wheel Download PDF

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Publication number
US2097803A
US2097803A US6441A US644135A US2097803A US 2097803 A US2097803 A US 2097803A US 6441 A US6441 A US 6441A US 644135 A US644135 A US 644135A US 2097803 A US2097803 A US 2097803A
Authority
US
United States
Prior art keywords
resinoid
wheel
bond
zones
grinding wheel
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.)
Expired - Lifetime
Application number
US6441A
Other languages
English (en)
Inventor
Sanford Baalis
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.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
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
Priority to NL42790D priority Critical patent/NL42790C/xx
Application filed by Norton Co filed Critical Norton Co
Priority to US6441A priority patent/US2097803A/en
Priority to FR803213D priority patent/FR803213A/fr
Priority to DED72127D priority patent/DE722684C/de
Priority to GB4484/36A priority patent/GB456950A/en
Priority to FR803212D priority patent/FR803212A/fr
Application granted granted Critical
Publication of US2097803A publication Critical patent/US2097803A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B24D5/04—Wheels in one piece with reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0045—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by stacking sheets of abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • B24D3/285—Reaction products obtained from aldehydes or ketones
    • 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
    • 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
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels

Definitions

  • WIT-Mesem BAAL is @A NFORD Patented Nov. 2, 1937'4 vPATENT OFFICE Norton Company, Worcester, Mass., a corporation of Massachusetts Application February 14, 1935. serial No. 6,441
  • This invention relates to grinding wheels and more particularly to a composite grinding wheel for use as a cutting-off wheel whichhas an uter annular grinding portion of diamond grains bonded by an organic bond and an inner central supporting body of a moldable, heat-settable ⁇ marily comprises the bulk of the article.
  • These materials of the respective zones or portions of the wheel may be 'combined and shaped into a grinding wheel by suitable means and methods.
  • the wheel may ,be made in accordance with a method which involves hot pressing a mixture of ⁇ diamond grains and resinoid bond in a mold in situ with a preformed resinoid core to form a hard, dense mass and heat setting the resinoid.
  • Fig.l l is a plan view of a grinding wheel embodying my invention.
  • Fig. 2 is a cross-sectional view, on an enlarged scale, taken on the line 2 2 of Fig. 1. l0
  • a composite grinding wheel of this type having a peripheral annular abrasive body of resinoid bonded diamond grains and an inner zone or central supporting ⁇ body ⁇ of a resinoid 15 composition integrally united therewith, in which there is incorporated suitable granular inert material in such an amount that the relative shrinkages between the inner vand outer zones are-substantially equalized. That is, the ingredients of 20 the inner and outer zones are so selected and proportioned, and preferably in equal volume percentages in the two zones, that they may be formed into a unitary body of substantially the same structure and shinkage throughout.
  • V 25 Referring Vto the drawing, which shows one 4specific embodiment of my invention, I have there illustrated a' grinding wheel having an outer grinding portion or rim lll nof resinoid bonded diamond granules and a center portion l2 30 of a resinoid composition interspersed with granular inert material. A central holei3 is provided, in the portion l2 for the subsequent mounting of the complete'wheel on a spindle.
  • I may utilize any mineral or non-mmeral substances which do not change in size materially under the temperature conditions employed during hot pressing'; and, for example, I may em- 60 ploy such granular materials as silicon carbide, crystalline alumina or quartz sand. It is an essential feature -of the invention that the volumel percentages of bond and grains in the two zones ofd the wheel shall be sulclently and 50% by volume of bond, then one should use 50% by volume of bond and 50% by volume of granular ller in the inner zone. identical shrinkages. Reasonable variations in these proportions are, of course, permissible.
  • composition which will be suitablefor forming a satisfactory grinding wheel having substantially equal shrinkage throughout, I may utilize the ingredients in the following proportions:
  • the materials of the two portions or zones arev mixed separately and in a dry condition until the respective grains of diamond and 1111er have each been thoroughly incorporated with the particular resinoid bond employed therewith which is in a powdered or finely divided condition.
  • the cntral support or inner zone of the wheel is rst formed by 'pressurein a cylindrical mold of the size ydesired for the wheel center which has resulted in a body having compact and reasonably dense structure.
  • the dry resinoid mixture as above preparedland incorporating the granular illler is molded by a prelimicentral support.
  • this invention Y applies to a composite wheel structure in which the central non-abrasive portion shrinks either more or less than does the outer diamond rim portion during cooling of the bond in each of the respective portions after it has been matured by heat. If the composition of the central zone contained materials which served to prevent its contracting as much as does the cured diamond and resinoid mixture in the rim, then the greater rim-,shrinkage would place the center portion under compression and cause warpage or buckling of this center portion. Similarly, if the center portion should shrink more than the outer rim, then either the rim would be placed under radial tension to produce warping ofthe center, orthe two zones might even separate due to the.
  • each bond should occupy the same percentage per unit of volume in each of the zones.
  • the grain size of the diamonds and that of the granular filler in the respective zones are substantially the same size. It is ⁇ important, however, if strength is to be considered. that the grains of granular inert material in the inner zone be made of a fine grit size, whether or not the diamond grains employed in the rim portion are small in size. Nevertheless, there must be the ysame total volume of solids per unit of volume in each of the zones. Also, if the resinoids differ in their shrinkage coefiicients, then due allowance will be made for this in determiningf the volume percentages thereof.
  • a thin cutting ofi grinding wheel compris- 5 ing an outer annular abrasive zone of diamond p grains and a reacted resinoid bond compacted Xand proportioned to provide a dense body and a central supporting zone of silicon carbide grains

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US6441A 1935-02-14 1935-02-14 Grinding wheel Expired - Lifetime US2097803A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL42790D NL42790C (is") 1935-02-14
US6441A US2097803A (en) 1935-02-14 1935-02-14 Grinding wheel
FR803213D FR803213A (fr) 1935-02-14 1936-02-14 Meule et son procédé de fabrication
DED72127D DE722684C (de) 1935-02-14 1936-02-14 Verfahren zur Herstellung von harzgebundenen Diamantkorn-Schleifscheiben, insbesondere Schneidscheiben
GB4484/36A GB456950A (en) 1935-02-14 1936-02-14 Composite grinding wheels and methods of making the same
FR803212D FR803212A (fr) 1935-02-14 1936-02-14 Meule composite et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6441A US2097803A (en) 1935-02-14 1935-02-14 Grinding wheel

Publications (1)

Publication Number Publication Date
US2097803A true US2097803A (en) 1937-11-02

Family

ID=21720904

Family Applications (1)

Application Number Title Priority Date Filing Date
US6441A Expired - Lifetime US2097803A (en) 1935-02-14 1935-02-14 Grinding wheel

Country Status (5)

Country Link
US (1) US2097803A (is")
DE (1) DE722684C (is")
FR (2) FR803213A (is")
GB (1) GB456950A (is")
NL (1) NL42790C (is")

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496234A (en) * 1944-05-15 1950-01-31 Carborundum Co Abrasive articles and methods of manufacturing the same
US2913858A (en) * 1957-09-04 1959-11-24 Nat Broach & Mach Gear honing tool
US3898773A (en) * 1973-08-28 1975-08-12 Swarovski Tyrolit Schleif Grinding disk
US4369046A (en) * 1979-06-15 1983-01-18 Abrasives International N.V. Process for making an abrasive grinding wheel
US4988370A (en) * 1984-05-31 1991-01-29 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US5139539A (en) * 1981-12-15 1992-08-18 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US5139536A (en) * 1981-12-15 1992-08-18 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US5834569A (en) * 1995-03-21 1998-11-10 Norton Company Grinding wheel for flat glass beveling
US20030162488A1 (en) * 2000-01-17 2003-08-28 Georges Bancon Abrasive grindstone and method for making same
US6890250B1 (en) * 1998-09-03 2005-05-10 Ehwa Diamond Ind., Co., Ltd. Diamond blade having rim type cutting tip for use in grinding or cutting apparatus
CN108994747A (zh) * 2018-08-01 2018-12-14 江苏三锐研磨科技有限公司 一种磨削量自动补偿的树脂精磨砂轮成型方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120312B (de) * 1956-02-28 1961-12-21 Carborundum Co Verfahren zur Herstellung von Trennschleifscheiben
DE3741279A1 (de) * 1987-12-05 1989-06-15 Jochen C Dzierzon Schleifscheibe
DE3836587A1 (de) * 1988-10-27 1990-05-03 Winter & Sohn Ernst Innenlochsaege
US6386948B1 (en) * 1999-06-01 2002-05-14 Sumitomo Special Metals Co., Ltd. Magnet member cutting method and magnet member cutting
CA2995886C (en) * 2015-08-21 2022-03-01 August Ruggeberg Gmbh & Co. Kg Abrasive tool and method for producing an abrasive tool of this kind
CN110774170B (zh) * 2017-12-30 2021-04-09 苏州赛尔科技有限公司 蓝宝石衬底减薄用砂轮齿

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496234A (en) * 1944-05-15 1950-01-31 Carborundum Co Abrasive articles and methods of manufacturing the same
US2913858A (en) * 1957-09-04 1959-11-24 Nat Broach & Mach Gear honing tool
US3898773A (en) * 1973-08-28 1975-08-12 Swarovski Tyrolit Schleif Grinding disk
US4369046A (en) * 1979-06-15 1983-01-18 Abrasives International N.V. Process for making an abrasive grinding wheel
US5139539A (en) * 1981-12-15 1992-08-18 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US5139536A (en) * 1981-12-15 1992-08-18 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US4988370A (en) * 1984-05-31 1991-01-29 Minnesota Mining And Manufacturing Company Alumina bonded abrasive for cast iron
US5834569A (en) * 1995-03-21 1998-11-10 Norton Company Grinding wheel for flat glass beveling
US6890250B1 (en) * 1998-09-03 2005-05-10 Ehwa Diamond Ind., Co., Ltd. Diamond blade having rim type cutting tip for use in grinding or cutting apparatus
US20030162488A1 (en) * 2000-01-17 2003-08-28 Georges Bancon Abrasive grindstone and method for making same
US6840850B2 (en) * 2000-01-17 2005-01-11 Saint-Gobain Abrasifs Technologie Et Services Abrasive grindstone and method for making same
CN108994747A (zh) * 2018-08-01 2018-12-14 江苏三锐研磨科技有限公司 一种磨削量自动补偿的树脂精磨砂轮成型方法

Also Published As

Publication number Publication date
FR803212A (fr) 1936-09-25
FR803213A (fr) 1936-09-25
NL42790C (is")
GB456950A (en) 1936-11-18
DE722684C (de) 1942-07-16

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