|Publication number||US3067551 A|
|Publication date||Dec 11, 1962|
|Filing date||Sep 22, 1958|
|Priority date||Sep 22, 1958|
|Publication number||US 3067551 A, US 3067551A, US-A-3067551, US3067551 A, US3067551A|
|Inventors||Maginnis James W|
|Original Assignee||Bethlehem Steel Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (75), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Dec. 11, 1962 v J. w. MAGINNIS 3,067,551
GRINDING METHOD Filed Sept. 22, 1958 INVENTOR James 14 Magi/M125 ATTORNEY United States Filed Sept. 22, 1958, Ser. No. 762,583 7 Claims. (Cl. 51-281) This invention relates to a method of grinding, particularly a method for grinding cylindrical smooth surfaced rolls.
Although the method of this invention may be used to grind any type of roll, it is particularly directed to the grinding of chilled cast iron or alloy steel rolls used in steel mill operations to roll strip, sheet or foil, said rolls usually being cylindrical and smooth surfaced.
Rolls used in such operations rapidly lose their desired shape and finish due to the great pressures exerted upon them and the hardness of the material being rolled, and must be frequently reground to restore their shape and finish.
This method of restoration is acomplished by grinding with an abrasive wheel or wheels. The grinding wheels are cylindrical, with a flat peripheral grinding surface which grinds the roll as the wheel traverses back and forth across the roll surface from one end to the other.
Good grinding practice calls for the use of large coarse grained abrasive material to reshape the rolls, and small, fine grained abrasive material to supply the desired smoothness of finish. This need for both coarse grain and fine grain abrasive material to regrind rolls makes necessary the use of two or more grinding wheels of varying grain size ranging from coarse to fine, to get the shape and finish desired. However, the use of a multiple number of wheels involves halting of the grinding operation in order to change wheels, thus increasing the grinding costs and lowering production rates. To speed up the grinding operation, a common practice is to use a single wheel of intermediate grain size. This procedure increases production rates, but produces a poorer quality finish.
The object of this invention is a method of grinding rolls whereby the high quality finish obtained by the use of multiple wheels can be accomplished at the high production rates achieved by the use of a single wheel of intermediate grain size.
I have found that this object can be accomplished by using a sandwich or segmental type wheel whose grinding surface consists of adjacent parallel sections or segments of varying grain size so arranged that rough grinding and polishing of the roll is accomplished in each pass of the wheel across the roll surface. Such a wheel is, in effect, several abrasive cylindrical discs bonded together at their radial surfaces.
Thus, the peripheral grinding face of the wheel used in the method of my invention is comprised of side sections of fine grain abrasive, with coarser grained abrasive sandwiched between the two fine grain sections.
The grinding area lying between the two fine grain side sections may consist of coarser material of a uniform grain size, or it may be divided into adjacent, parallel sections of different grain size, provided that all of the abrasive material is coarser than the fine grained side sections.
The sections of varying grain size must be so arranged that in each pass of the wheel across the roll surface the grinding action progresses successively from fine to coarse and back to fine again.
FIGURES 1 and 2 illustrate two examples of wheels than can be used to practice my invention. S is the flat peripheral grinding surface, consisting of fine grained atent -.tion at their radial surfaces.
sections F and coarse grained central portion C in FIG- URE l, and consisting of fine section F, intermediate grain size sections I, and coarse section C in FIGURE'Z. 3 indicates the point at which the sides and grinding face meet, and 4 shows the point at which the sections having different grain sizes are bonded together.
The wheels are cylindrical in shape, with the sections of varying grain size providing a straight, fiat, continuous grinding surface or face. The side section F should be of the same grain size. The grain sizes of the different sections may be varied to suit the particular grinding operation involved.
Any kind of abrasive material can be used, depending on the material to be ground, and the wheels can be made by any of the well known methods of manufacture.
My method not only permits reshaping and polishing to be accomplished in a single operation, but also effects a saving in wheel costs due to reduced wear on the wheels since the strain on the coarse material is reduced by the preceding grinding action of the fine material as the wheel passes back and forth across the roll surface.
An example of my grinding wheel used in my method is a silicon carbide wheel for grinding nickel grain iron mill rolls with an -85 Shore hardness. This wheel had a 3" peripheral grinding face, with a 2. center section of coarse 46 grain size silicon carbide, and two side sections of fine grain size silicon carbide, each section being /2" wide.
The fine section were bonded to the coarse center sec- My method of grinding produced a 6 micro finish on the roll, and produced a wheel life of about 200 rolls per wheel, whereas a standard 3 wide wheel of intermediate 54 grain size silicon carbide used previously had a wheel life of only rolls per wheel, and produced a poorer quality finish.
Although the grain size of the various sections or segments will vary according to the type of material to be ground and the type of finish desired, wheels used to grind iron or steel rolls should have a grain size not coarser than 100 in the finest sections, and a grain size not substantially finer than 50 in the coarsest section.
The width of each abrasive section will also vary according to the particular grinding operation involved.
l. A surface grinding method which comprises the sequential steps of traversing the surface to be ground from one end to the other with a fine grained abrasive disc, traversing said surface in the same direction with a coarse grained abrasive disc and traversing said surface in the same direction with another fine grained abrasive disc.
2. The method of claim 1 in which each of said fine grain discs is bonded to a radial surface of said coarse grained disc.
3. A surface grinding method which comprises the sequential steps of traversing the surface to be ground from one end to the other with a fine grained abrasive disc, traversing said surface in the same direction with a coarse grained abrasive disc, traversing said surface in the same direction with another fine grained abrasive disc, and then repeating said traversing steps in the opposite direction.
4. The method of claim 3 in which each of said fine grained discs is bonded to a radial surface of said coarse grained disc.
5 A surface grinding method which comprises the sequential steps of traversing the surface to be ground from one end to the other with a fine grained abrasive disc, traversing said surface in the same direction with an intermediate grained abrasive disc, traversing said surface in the same direction with a coarse abrasive disc traversing said surface in the same direction with angrained disc is bonded 'to the inner radial surfaces of other intermediate grained abrasive disc, traversing said each f a intermediate grained discssurface in the same direction with another fine grained abrasive dim References Cited 1n the file of th1s patent 6. The method of claim 5 followed -by repeating said 5 TE TE NT sequential steps in the opposite direction. 1 1 531 King Feb. 8, 1927 7. The method of claim 5 in which each of-said fine 193 377 Dunbar et 1 A 23 71940 grained discs is bonded to the outer "radial surfaces of 2,224,423 Bi D 10, 1940 each of said intermediate grained discs and said coarse 2,396,505 Gumper Mar. 12, 1946
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1616531 *||Aug 8, 1922||Feb 8, 1927||Norton Co||Cutting-off abrasive wheel|
|US2198377 *||Apr 27, 1937||Apr 23, 1940||Norton Co||Lapping machine|
|US2224423 *||Jun 8, 1939||Dec 10, 1940||Cincinnati Grinders Inc||Process and apparatus for finishing preground articles|
|US2396505 *||Jun 22, 1943||Mar 12, 1946||Bridgeport Safety Emery Wheel||Grinding|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3125836 *||Oct 13, 1961||Mar 24, 1964||Gem cutters dop|
|US3153884 *||Aug 23, 1962||Oct 27, 1964||Landis Tool Co||Apparatus for grinding flexible workpieces|
|US3181283 *||Dec 26, 1962||May 4, 1965||Hammond Machinery Builders Inc||Means for cutting chip breaker grooves|
|US3220431 *||Jun 18, 1963||Nov 30, 1965||E I M Company Inc||Automatic regrinding valve apparatus|
|US3243922 *||Jul 9, 1963||Apr 5, 1966||Engelhard Hanovia Inc||Surfacing of materials|
|US3284898 *||May 21, 1964||Nov 15, 1966||Evan L Hopkins||Hand scraper|
|US3299579 *||Jan 17, 1964||Jan 24, 1967||Heald Machine Co||Grinding machine|
|US3490464 *||Jan 26, 1966||Jan 20, 1970||Silberman Samuel J||Apparatus for distributing and regulating the flow of particulate material|
|US3802130 *||May 1, 1972||Apr 9, 1974||Edenvale Eng Works||And like grinding wheels|
|US3885925 *||Oct 17, 1973||May 27, 1975||Tatar Alexander||Method for the sharpening of four faces drills and sharpening machine for carrying out this method|
|US3982358 *||Apr 23, 1975||Sep 28, 1976||Heijiro Fukuda||Laminated resinoid wheels, method for continuously producing same and apparatus for use in the method|
|US4338748 *||Jun 16, 1980||Jul 13, 1982||Firma Heinrich Lippert Gmbh||Grinding tool metal machining|
|US4565034 *||Jan 3, 1984||Jan 21, 1986||Disco Abrasive Systems, Ltd.||Grinding and/or cutting endless belt|
|US4744178 *||Sep 25, 1986||May 17, 1988||Institute For Industrial Research And Standards||Grinding device|
|US4910924 *||Jun 23, 1988||Mar 27, 1990||Norton Company||Composite grinding wheel|
|US5063714 *||Apr 4, 1989||Nov 12, 1991||Firma Ernst Winter & Sohn (Gmbh & Co.)||Grinding wheel for deep grinding|
|US5683290 *||Oct 21, 1996||Nov 4, 1997||Nec Corporation||Apparatus for forming a convex tip on a workpiece|
|US6012974 *||Apr 1, 1998||Jan 11, 2000||Lee; Shih Tung||Method for generating a rough surface on a polymer or a polyamide membrane for the top layer of a flexible rule|
|US6159286 *||Nov 4, 1998||Dec 12, 2000||Sung; Chien-Min||Process for controlling diamond nucleation during diamond synthesis|
|US6286498||Sep 20, 1999||Sep 11, 2001||Chien-Min Sung||Metal bond diamond tools that contain uniform or patterned distribution of diamond grits and method of manufacture thereof|
|US6402607 *||Dec 18, 2000||Jun 11, 2002||The Gleason Works||Fine-machining tool for machining gear workpieces|
|US6679243||Aug 22, 2001||Jan 20, 2004||Chien-Min Sung||Brazed diamond tools and methods for making|
|US7089925||Aug 18, 2004||Aug 15, 2006||Kinik Company||Reciprocating wire saw for cutting hard materials|
|US7124753||Sep 27, 2002||Oct 24, 2006||Chien-Min Sung||Brazed diamond tools and methods for making the same|
|US7201645||Sep 29, 2004||Apr 10, 2007||Chien-Min Sung||Contoured CMP pad dresser and associated methods|
|US7527050 *||May 18, 2006||May 5, 2009||Saint-Gobain Abrasives Technology Company||Method for fabricating multi-layer, hub-less blade|
|US7585366||Dec 14, 2006||Sep 8, 2009||Chien-Min Sung||High pressure superabrasive particle synthesis|
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|US8622787||Mar 18, 2010||Jan 7, 2014||Chien-Min Sung||CMP pad dressers with hybridized abrasive surface and related methods|
|US8777699||Sep 21, 2011||Jul 15, 2014||Ritedia Corporation||Superabrasive tools having substantially leveled particle tips and associated methods|
|US8821217 *||Jan 24, 2011||Sep 2, 2014||Giovanni Ficai||Abrasive annular grinding wheel|
|US8974270||May 23, 2012||Mar 10, 2015||Chien-Min Sung||CMP pad dresser having leveled tips and associated methods|
|US8986409||Jun 30, 2012||Mar 24, 2015||Saint-Gobain Ceramics & Plastics, Inc.||Abrasive articles including abrasive particles of silicon nitride|
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|US9238207||Feb 28, 2012||Jan 19, 2016||Chien-Min Sung||Brazed diamond tools and methods for making the same|
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|US9303196||Aug 12, 2014||Apr 5, 2016||Saint-Gobain Ceramics & Plastics, Inc.||Liquid phase sintered silicon carbide abrasive particles|
|US9321149||Nov 6, 2012||Apr 26, 2016||3M Innovative Properties Company||Composite abrasive wheel|
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|US9517546||Sep 26, 2012||Dec 13, 2016||Saint-Gobain Ceramics & Plastics, Inc.||Abrasive articles including abrasive particulate materials, coated abrasives using the abrasive particulate materials and methods of forming|
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|US9598620||Jan 16, 2015||Mar 21, 2017||Saint-Gobain Ceramics & Plastics, Inc.||Abrasive articles including abrasive particles of silicon nitride|
|US9604346||Jun 27, 2014||Mar 28, 2017||Saint-Gobain Cermaics & Plastics, Inc.||Abrasive article including shaped abrasive particles|
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|US20030084894 *||Sep 27, 2002||May 8, 2003||Chien-Min Sung||Brazed diamond tools and methods for making the same|
|US20060201281 *||May 18, 2006||Sep 14, 2006||Corcoran Robert F||High precision multi-grit slicing blade|
|US20070051354 *||Sep 8, 2006||Mar 8, 2007||Chien-Min Sung||Brazed diamond tools and methods for making the same|
|US20070254566 *||Apr 10, 2007||Nov 1, 2007||Chien-Min Sung||Contoured CMP pad dresser and associated methods|
|US20090283089 *||May 11, 2009||Nov 19, 2009||Chien-Min Sung||Brazed Diamond Tools and Methods for Making the Same|
|US20110212674 *||Jan 24, 2011||Sep 1, 2011||Giovanni Ficai||Abrasive annular grinding wheel|
|US20150072601 *||Jul 15, 2014||Mar 12, 2015||Chien-Min Sung||Superabrasive tools having substantially leveled particle tips and associated methods|
|USD785339 *||Oct 23, 2014||May 2, 2017||Griot's Garage, Inc.||Hand applicator buffing pad|
|CN100509292C||Apr 9, 2003||Jul 8, 2009||利德株式会社||Multi-layer cutter blade and manufacturing method thereof|
|CN104023916A *||Nov 6, 2012||Sep 3, 2014||3M创新有限公司||Composite abrasive wheel|
|WO2014210160A1 *||Jun 25, 2014||Dec 31, 2014||Saint-Gobain Abrasives, Inc.||Abrasive article and method of making same|
|U.S. Classification||451/49, 451/544|
|International Classification||B24D5/14, B24D5/00|