US3406488A - Abrasive flap wheel - Google Patents

Abrasive flap wheel Download PDF

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Publication number
US3406488A
US3406488A US489575A US48957565A US3406488A US 3406488 A US3406488 A US 3406488A US 489575 A US489575 A US 489575A US 48957565 A US48957565 A US 48957565A US 3406488 A US3406488 A US 3406488A
Authority
US
United States
Prior art keywords
flap
flaps
wheel
elastomer
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.)
Expired - Lifetime
Application number
US489575A
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English (en)
Inventor
Kenley J Rykken
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to US489575A priority Critical patent/US3406488A/en
Priority to ES331143A priority patent/ES331143A1/es
Priority to DK492666AA priority patent/DK123963B/da
Priority to BR183106/66A priority patent/BR6683106D0/pt
Priority to DE1966M0071010 priority patent/DE1577594B2/de
Priority to SE12799/66A priority patent/SE319105B/xx
Priority to GB42407/66A priority patent/GB1149180A/en
Application granted granted Critical
Publication of US3406488A publication Critical patent/US3406488A/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
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/04—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising a plurality of flaps or strips arranged around the axis

Definitions

  • This invention relates to an improved coated abrasive flap wheel structure.
  • the present invention provides a novel flap wheel in which flap loss is essentially eliminated while the rate of cut is maintained at the same high level as in conventional wheels. Deleterious heat buildup is prevented, even in wide wheels, and the market for flap wheels is thus greatly enlarged, especially for automated grinding and polishing operations. Wheels made in accordance with the invention run smoothly, i.e., with minimum vibration, thereby greatly improving the finish imparted to workpieces.
  • FIGURE 1 is a view in perspective of a coated abrasive flap wheel assembly made in accordance with the present invention with certain parts shown broken away in the interest of clarity, and
  • flap wheel assembly 10 is made up of an annulus of coated abrasive flaps 11 and side plates 12 and 12a.
  • Each coated abrasive flap has a notch on each side, the notches aligning to form grooves 13 and 13a on the lateral edges of the wheel into which grooves annular flange 14 or 14a on side plates 12 and 12a snugly fit.
  • Side plates 12 and 12a are respectively provided with center holes 15 and 15a for mounting on a drive shaft.
  • the annulus of flaps is bound together at its radially innermost portion by a relatively hard tough resinous material 16.
  • elastomeric material 17 and 17a In the area immediately at and radially outwardly adjacent to grooves 13 and 13a is positioned elastomeric material 17 and 17a, penetrating between flaps 11 and forming therewith a continuous ring which lies radially outward from the circumference of side plates 12 and 12a.
  • the wheel was placed on one side and the upper groove then filled approximately half full of a room temperature-vulcanizing fluid silicone resin, commercially available from the General Electric Company under the trade designation Clear Seal, approximately 22 grams being used.
  • Clear Seal a room temperature-vulcanizing fluid silicone resin
  • a stamped sheet metal side plate having an annular flange complementary to the dimensions of the groove was then seated, the force of inserting the flange in the groove displacing part of the silicone resin into the flap area immediately surrounding the groove, some resin additionally spreading over the lateral edges of the flaps in the area immediately adjacent the mouth of the groove.
  • the wheel was then inverted and the process repeated on the opposite side.
  • (Clear Seal" silicone resin is an acetylated vinyl silane which, when exposed to the water normally spent in the atmosphere, splits out acetic acid, the resin polymerizing into a rubbery solid).
  • the wheels of the succeeding examples herein were modified by removing the side plates after the epoxy resin had cured, filling each groove with approximately 5 grams of a fluent elastomer, replacing the side plate, thereby forcing the elastomer material into the area immediately adjacent the flaps, and solidifying the liquid elastomer.
  • Each such wheel was evaluated in a simulated heavy duty grinding operation in which it was rotated at 5500 rpm. while being urged against the flap surface of an oscillating mild steel workpiece.
  • Performance was evaluated in terms of (1) ability to run smoothly (2) total amount of steel c-ut obtained before wheel failure, and (3) time required to run the wheel to its end point. Failure was considered to occur if there was excessive flap loss or if an unbalanced condition developed. The test was halted after 2-5 minutes if no such failure had occurred.
  • Patent 2,918,442. 7a Same as 7, but heated 24 hours at 150 F- 80 1, 150 500 25 153 12.8 0 7b Same as 7, but heated 24 hours at 250 F Too brittle to measure; I 25 140 5. 3 0
  • polypropylene glycol (M.W. approx. 2,000--Niax Dioi PPG2025, sold by Union Carbide) 2.5 parts trrol (reaction product of glycerine and polypropylene oxide, M.W., approx. 3,000, OH No. 56," LG56, sold by Union Carbide) 40 parts toluene 2,4-diisocyanote, 3 parts H20.
  • vulcanizing silicone elastomer was applied to l to 6" flap wheels of the type used as the control in Table I, the .only variable being the amount of elastomer. It was found that when 3.7 grams of silicone was employed, the wheel ran for 25 minutes and cut approximately 170 grams of steel with a wear ratio in excess of 9. Lesser amounts appeared inadequate to prevent failure by flap loss, and greater amounts did not appear to further improve the performance.
  • the amount .of elastomeric material to be applied is dependent to some degree, however, on such factors as the grade of abrasive mineral used, wheel size, dimensions of the annular groove, and the viscosity of the elastomer as applied.
  • the elastomer may also be preformed as a band or strip and inserted in the grooves of an abrasive flap wheel.
  • a l x 6" wheel like the control in Table I, was modified by inserting a preformed ring of elastomer in each annular lateral groove prior to seating the flanged side plates. The force of axial compression applied when the wheel was mounted forced the rings of elastomer snugly against and between the flaps in the area at and immediately adjacent to the grooves. Test procedure was the same as in Table 1.
  • flap wheels are desirably bonded together at the radially inner end of the flaps, it has been found that the present invention permits making narrow (l-inch wide) wheels without such bonding.
  • 1" wheels having no core bonding resin fail by disintegration in less than .one minute when subjected to the test heretofore described.
  • the following table sets forth a series of l x 6" wheels, made in the same manner as the wheels in Table I except for omission of the epoxy core adhesive. The wheels were tested in the same manner as the wheels of Examples 2-11 inclusive, except that they were driven at 4560 rpm. and the force urging the wheel against the workpiece was about 10% less.
  • elastomers which are initially solvent-free fluids, which solidify at room temperature, which are relatively soft when cured, and which neither embrittle nor flow when subjected to temperatures in excess of F. Since it is desirable to preserve the integrity of flap wheels during shipping and storage, it is likewise desirable for the elastomer to have sufiicient adhesion to metal to maintain the side plates snugly adhered to the sides of the wheel. I have found that polyurethane and room temperature vulcanizing silicone elastomers possess such characteristics and hence are particularly attractive. I am, of course, aware that others have heretofore adhered side plates to the lateral surfaces of abrasive flap wheels (see, e.g., U.S. Patent No. 2,749,- 224), and my invention is not directed to that concept per se.
  • a coated abrasive flap wheel assembly having outstanding resistance to failure by flap loss, eccentricity, or heat distortion, comprising in combination: an annulus of radially disposed flaps of coated abrasive sheet material, an annular groove on each side of said annulus adjacent the radially inner ends of said flaps, an annular side plate having on its laterally inner aspect an annular flange complementary to and positioned within said groove, and, between said side plate and said annulus at and adjacent the radially outer area where said side plate contacts said annulus, a resilient elastomer which extends between said flaps to form therewith a ring composed of contiguous alternate sections of flaps and elastomer, said ring being located radially outward of any other flap-contacting means unifying the radially inner ends of said flaps.
  • a coated abrasive flap wheel comprising an annulus of radially disposed flaps of coated abrasive sheet material firmly bonded together at their radially inner end portions by a matrix of rigid polymeric material, said annulus being adapted for mounting between a pair of laterally positioned side plates, the improvement which comprises providing substantially only at and adjacent the radially outer lateral area where said wheel is to be contacted by said side plates a resilient elastomer which penetrates between said flaps to form therewith a continuous ring, said ring being located radially outward of any other flap-contacting means unifying the radially inner ends of said flaps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US489575A 1965-09-23 1965-09-23 Abrasive flap wheel Expired - Lifetime US3406488A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US489575A US3406488A (en) 1965-09-23 1965-09-23 Abrasive flap wheel
ES331143A ES331143A1 (es) 1965-09-23 1966-09-13 Un dispositivo de rueda de aletas abrasivas recubiertas.
DK492666AA DK123963B (da) 1965-09-23 1966-09-22 Lamelslibeskive og fremgangsmåde til dens fremstilling.
BR183106/66A BR6683106D0 (pt) 1965-09-23 1966-09-22 Roda feita de secoes recobertas com abrasivo e processo para aumentar a resistencia das mesmas
DE1966M0071010 DE1577594B2 (de) 1965-09-23 1966-09-22 Schwabbelscheibe
SE12799/66A SE319105B (de) 1965-09-23 1966-09-22
GB42407/66A GB1149180A (en) 1965-09-23 1966-09-22 Abrasive flap wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US489575A US3406488A (en) 1965-09-23 1965-09-23 Abrasive flap wheel

Publications (1)

Publication Number Publication Date
US3406488A true US3406488A (en) 1968-10-22

Family

ID=23944409

Family Applications (1)

Application Number Title Priority Date Filing Date
US489575A Expired - Lifetime US3406488A (en) 1965-09-23 1965-09-23 Abrasive flap wheel

Country Status (7)

Country Link
US (1) US3406488A (de)
BR (1) BR6683106D0 (de)
DE (1) DE1577594B2 (de)
DK (1) DK123963B (de)
ES (1) ES331143A1 (de)
GB (1) GB1149180A (de)
SE (1) SE319105B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258509A (en) * 1978-05-30 1981-03-31 Standard Abrasives, Inc. Flap-type rotary abrasive device
US4448590A (en) * 1978-05-30 1984-05-15 Standard Abrasives, Inc. Flap-type rotary abrasive device
US5554068A (en) * 1994-12-13 1996-09-10 Minnesota Mining And Manufacturing Company Abrasive flap brush and method and apparatus for making same
WO1999048647A1 (de) * 1998-03-21 1999-09-30 M & F Entwicklungs- Und Patentverwertungs-Gmbh Lamellenschleifwerkzeug
US5996167A (en) * 1995-11-16 1999-12-07 3M Innovative Properties Company Surface treating articles and method of making same
WO2002018102A1 (de) * 2000-08-28 2002-03-07 M & F Entwicklungs- Und Patentverwertungs-Gmbh Polierwerkzeug
US6840848B1 (en) 2002-12-04 2005-01-11 Ralph E. Dyar Bushings and abrasive wheel therewith
US9309353B2 (en) 2013-08-09 2016-04-12 The Boeing Company Formulation methodology for distortional thermosets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138334B (en) * 1983-03-11 1986-11-05 John Robert Schetrumpf Abrasion device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749224A (en) * 1954-12-15 1956-06-05 Merit Products Inc Method of making grinding wheels
US2818692A (en) * 1956-09-20 1958-01-07 Russell W Bernstein Abrasive grinding wheel
US2842902A (en) * 1955-11-07 1958-07-15 Minnesota Mining & Mfg Non-rigid rotative abrasive structures
US3206894A (en) * 1959-04-29 1965-09-21 Schaffner Mfg Company Inc Polishing wheel
US3212219A (en) * 1962-01-17 1965-10-19 Merit Products Inc Method of fabricating abrasive leaves
US3220810A (en) * 1962-05-03 1965-11-30 Merit Products Inc Flap-type abrasive wheel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749224A (en) * 1954-12-15 1956-06-05 Merit Products Inc Method of making grinding wheels
US2842902A (en) * 1955-11-07 1958-07-15 Minnesota Mining & Mfg Non-rigid rotative abrasive structures
US2818692A (en) * 1956-09-20 1958-01-07 Russell W Bernstein Abrasive grinding wheel
US3206894A (en) * 1959-04-29 1965-09-21 Schaffner Mfg Company Inc Polishing wheel
US3212219A (en) * 1962-01-17 1965-10-19 Merit Products Inc Method of fabricating abrasive leaves
US3220810A (en) * 1962-05-03 1965-11-30 Merit Products Inc Flap-type abrasive wheel

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448590A (en) * 1978-05-30 1984-05-15 Standard Abrasives, Inc. Flap-type rotary abrasive device
US4258509A (en) * 1978-05-30 1981-03-31 Standard Abrasives, Inc. Flap-type rotary abrasive device
US5554068A (en) * 1994-12-13 1996-09-10 Minnesota Mining And Manufacturing Company Abrasive flap brush and method and apparatus for making same
US5674121A (en) * 1994-12-13 1997-10-07 Minnesota Mining And Manufacturing Company Core having an outer surface for receiving adhesive
US5695559A (en) * 1994-12-13 1997-12-09 Minnesota Mining And Manufacturing Company Apparatus for coating adhesive onto a core
US6514363B2 (en) 1995-11-16 2003-02-04 3M Innovative Properties Company Surface treating articles and method of making same
US5996167A (en) * 1995-11-16 1999-12-07 3M Innovative Properties Company Surface treating articles and method of making same
US6251002B1 (en) 1995-11-16 2001-06-26 3M Innovative Properties Company Surface treating articles and method of making same
US6866572B1 (en) 1998-03-21 2005-03-15 M&F Entwicklungs Plated grinding tool
WO1999048647A1 (de) * 1998-03-21 1999-09-30 M & F Entwicklungs- Und Patentverwertungs-Gmbh Lamellenschleifwerkzeug
WO2002018102A1 (de) * 2000-08-28 2002-03-07 M & F Entwicklungs- Und Patentverwertungs-Gmbh Polierwerkzeug
US20040048560A1 (en) * 2000-08-28 2004-03-11 Marion Wendt-Ginsberg Polishing tool
US7794309B2 (en) 2000-08-28 2010-09-14 Wendt Poliertechnik Gmbh & Co. Kg Polishing tool
US6840848B1 (en) 2002-12-04 2005-01-11 Ralph E. Dyar Bushings and abrasive wheel therewith
US9309353B2 (en) 2013-08-09 2016-04-12 The Boeing Company Formulation methodology for distortional thermosets
US9556306B2 (en) 2013-08-09 2017-01-31 The Boeing Company Formulation methodology for distortional thermosets
US9938372B2 (en) 2013-08-09 2018-04-10 The Boeing Company Formulation methodology for distortional thermosets
US10619002B2 (en) 2013-08-09 2020-04-14 The Boeing Company Formulation methodology for distortional thermosets

Also Published As

Publication number Publication date
GB1149180A (en) 1969-04-16
DK123963B (da) 1972-08-28
DE1577594B2 (de) 1977-01-20
ES331143A1 (es) 1968-03-16
DE1577594A1 (de) 1970-01-02
BR6683106D0 (pt) 1973-06-26
SE319105B (de) 1969-12-22

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