US2097803A - Grinding wheel - Google Patents
Grinding wheel Download PDFInfo
- 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
Links
Images
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)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL42790D NL42790C (fr) | 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 |
FR803212D FR803212A (fr) | 1935-02-14 | 1936-02-14 | Meule composite 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 |
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 (fr) |
DE (1) | DE722684C (fr) |
FR (2) | FR803213A (fr) |
GB (1) | GB456950A (fr) |
NL (1) | NL42790C (fr) |
Cited By (11)
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)
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 |
WO2017032396A1 (fr) * | 2015-08-21 | 2017-03-02 | August Rüggeberg Gmbh & Co. Kg | Outil de meulage et procédé de fabrication d'un tel outil de meulage |
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 |
-
0
- NL NL42790D patent/NL42790C/xx active
-
1935
- 1935-02-14 US US6441A patent/US2097803A/en not_active Expired - Lifetime
-
1936
- 1936-02-14 GB GB4484/36A patent/GB456950A/en not_active Expired
- 1936-02-14 DE DED72127D patent/DE722684C/de not_active Expired
- 1936-02-14 FR FR803213D patent/FR803213A/fr not_active Expired
- 1936-02-14 FR FR803212D patent/FR803212A/fr not_active Expired
Cited By (12)
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 |
---|---|
GB456950A (en) | 1936-11-18 |
DE722684C (de) | 1942-07-16 |
NL42790C (fr) | |
FR803213A (fr) | 1936-09-25 |
FR803212A (fr) | 1936-09-25 |
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