EP0236877A2 - Elément de meulage à liant de résine synthétique - Google Patents

Elément de meulage à liant de résine synthétique Download PDF

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Publication number
EP0236877A2
EP0236877A2 EP87102800A EP87102800A EP0236877A2 EP 0236877 A2 EP0236877 A2 EP 0236877A2 EP 87102800 A EP87102800 A EP 87102800A EP 87102800 A EP87102800 A EP 87102800A EP 0236877 A2 EP0236877 A2 EP 0236877A2
Authority
EP
European Patent Office
Prior art keywords
resin
synthetic resin
abrasive body
radius
recess
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.)
Granted
Application number
EP87102800A
Other languages
German (de)
English (en)
Other versions
EP0236877A3 (en
EP0236877B1 (fr
Inventor
Henning Dr.Dipl.-Ing. Brandin
Hans-Jürgen Dr.Dipl.-Chem. Padberg
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.)
Cerasiv GmbH Innovatives Keramik Engineering
Original Assignee
Feldmuehle AG
Cerasiv GmbH Innovatives Keramik Engineering
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 Feldmuehle AG, Cerasiv GmbH Innovatives Keramik Engineering filed Critical Feldmuehle AG
Priority to AT87102800T priority Critical patent/ATE74049T1/de
Publication of EP0236877A2 publication Critical patent/EP0236877A2/fr
Publication of EP0236877A3 publication Critical patent/EP0236877A3/de
Application granted granted Critical
Publication of EP0236877B1 publication Critical patent/EP0236877B1/fr
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
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings
    • 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
    • B24D5/16—Bushings; Mountings

Definitions

  • the invention relates to a resin-bonded grinding wheel with improved wet strength, which is provided for clamping with at least one bore and, if necessary, recesses for receiving clamping flanges on the end face of the body.
  • Resin-bonded grinding wheels have been used successfully for a long time. Ceramic-bonded grinding wheels are also known which are impregnated throughout to improve their strength. The related impregnation agents clog the pores present in the body and thereby change the grinding properties to the negative, because the closed pores reduce the amount of sanding per unit of time, on the other hand a certain lubricating film is generated by the synthetic resin material introduced and as a third side effect in many cases there is still an odor impairment. In practice, therefore, resin-bonded grinding wheels are used that are not soaked.
  • the present invention is therefore based on the object of providing an abrasive body which, without reducing the abrasive output and without changing the abrasive characteristic, can form cracks or breakouts in critical areas prevented.
  • a synthetic resin-bonded grinding wheel with improved wet strength which is provided for clamping with at least one bore and recesses for receiving clamping flanges on its end faces, in that the recesses are rounded off with a radius that is 0.027 to 0.2 -fold the diameter of the bore, and the area of the end faces where the clamping flanges engage and the recess is sealed or coated with a water-repellent synthetic resin.
  • the endangered areas are impregnated or coated with a synthetic resin, the attack of the water in this area is no longer possible, so that when using cooling lubricants during grinding there is no longer a decrease in the strength in this area, that is to say in the flange area the grinding wheel comes.
  • the notch effect is reduced by the application of radii, so that this also results in an increase in strength.
  • the radius as such is between 0.027 and 0.2 times the bore diameter, the lower limit of this area being far above the usual manufacturing dimensions and the upper area being limited by the available area and the resulting maximum permissible surface pressure is.
  • An advantageous embodiment of the invention provides that the diameter of the recess is equal to or greater than the sum of the flange outer diameter and twice the radius of the rounding.
  • the flange does not have to be chamfered in its outer area, which leads to a simplification in the manufacture of the flange. Nevertheless, there is no damage to the recess when clamping the grinding wheel.
  • a particularly preferred embodiment of the invention provides that the radius is equal to or greater than 1.48 d 0.32 bore .
  • a large number of substances can be used as synthetic resin for the sealing or coating, such as shellac or an ethanolic novolac solution.
  • epoxy resin is particularly preferred because, in addition to the water-repellent effect, this also leads to an additional mechanical hardening of this critical area of the grinding wheel.
  • the synthetic resins are advantageously applied in liquid form as fast-curing clearcoats, which can be done before or after firing, that is to say the hardening of the grinding wheels.
  • a grinding wheel with the following dimensions was manufactured:
  • the recess in the flange areas and a partial area on the end faces were coated with 20.0 g of a two-component corrosion-enamel paint, viscosity 400 to 500 cp, manufacturer Stromit.
  • the varnish was applied by hand with a brush and after three hours of drying, the abrasive body defined above was coated again.
  • the curing time was twelve hours at room temperature, the coating thickness for the partial coating was 1.5 mm.
  • a grinding wheel produced according to Example 1 was sealed with an ethanolic Novolak solution in the areas of the recess in the flange and in a partial area on the end face.
  • 50.0 g of novolak were heated and stirred into 50.0 g of ethanol and brought to solution.
  • the solution was cooled to the above after cooling Areas were applied, the seal was cured at 130 ° C, the curing time was four hours, the penetration depth of the impregnation was 2.5 mm.
  • the grinding wheel (7) is connected via flanges (6) to a shaft (8) which extends through the bore (1) of the grinding wheel (7).
  • the ring shoulder or the flange (6) are arranged in the cutouts (2). Their outer diameter extends close to the radius (4) with which the recesses (2) are rounded.
  • the areas (5) of the end faces (3) which are rounded against the cutouts (2) by the radius (13) and the cutouts (2) which are rounded by the radii (14) relative to the bore (1), are coated with a clear lacquer based on epoxy resin, whereby the pores (9) in this area are closed.
  • the diameter (11) of the recesses (2) in FIGS. 1 and 2 has approximately the value of the outer diameter of the flange (6) plus 2x the size of the radius (4), the center of which here lies within the grinding wheel (7).
  • the grinding body (7) has pores (9) which are open to the outside in the region of the end face (3) and are covered by a coating (12).
  • a seal (10) is introduced instead of a coating (12); H.
  • a material with a lower viscosity was used which penetrated into the pores (9) and filled them up.
  • the depth of penetration in this case was 2.5 mm.
  • FIG. 5 shows that the radius (4 ') is made substantially larger than the radii (13, 14). It can also be seen from this that the center point M ', from which the radius (4') starts, is arranged outside the grinding wheel (7).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP87102800A 1986-03-08 1987-02-27 Elément de meulage à liant de résine synthétique Expired - Lifetime EP0236877B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102800T ATE74049T1 (de) 1986-03-08 1987-02-27 Kunstharzgebundener schleifkoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607661 DE3607661A1 (de) 1986-03-08 1986-03-08 Kunstharzgebundener schleifkoerper
DE3607661 1986-03-08

Publications (3)

Publication Number Publication Date
EP0236877A2 true EP0236877A2 (fr) 1987-09-16
EP0236877A3 EP0236877A3 (en) 1989-06-07
EP0236877B1 EP0236877B1 (fr) 1992-03-25

Family

ID=6295827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102800A Expired - Lifetime EP0236877B1 (fr) 1986-03-08 1987-02-27 Elément de meulage à liant de résine synthétique

Country Status (3)

Country Link
EP (1) EP0236877B1 (fr)
AT (1) ATE74049T1 (fr)
DE (2) DE3607661A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9486896B2 (en) 2012-06-28 2016-11-08 Saint-Gobain Abrasives, Inc. Abrasive article and coating
US9844853B2 (en) 2014-12-30 2017-12-19 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs Abrasive tools and methods for forming same
US10189145B2 (en) 2015-12-30 2019-01-29 Saint-Gobain Abrasives, Inc. Abrasive tools and methods for forming same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR921586A (fr) * 1943-03-09 1947-05-12 Pierre à affûter
US2785515A (en) * 1956-03-14 1957-03-19 Simonds Abrasive Company Grinding wheel and means for mounting and driving the same
FR74270E (fr) * 1958-10-11 1960-11-07 Bague de centrage pour meules et analogues
US3526063A (en) * 1965-03-08 1970-09-01 Norton Co Integral mounting means and reinforcement for grinding wheels
US4240230A (en) * 1979-01-24 1980-12-23 The Carborundum Company Throw-away adaptors for grinding wheels

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110993A (en) * 1962-07-18 1963-11-19 Continental Granite Corp Grinding wheel with provision for coolant application

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR921586A (fr) * 1943-03-09 1947-05-12 Pierre à affûter
US2785515A (en) * 1956-03-14 1957-03-19 Simonds Abrasive Company Grinding wheel and means for mounting and driving the same
FR74270E (fr) * 1958-10-11 1960-11-07 Bague de centrage pour meules et analogues
US3526063A (en) * 1965-03-08 1970-09-01 Norton Co Integral mounting means and reinforcement for grinding wheels
US4240230A (en) * 1979-01-24 1980-12-23 The Carborundum Company Throw-away adaptors for grinding wheels

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9486896B2 (en) 2012-06-28 2016-11-08 Saint-Gobain Abrasives, Inc. Abrasive article and coating
US9844853B2 (en) 2014-12-30 2017-12-19 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs Abrasive tools and methods for forming same
US10189146B2 (en) 2014-12-30 2019-01-29 Saint-Gobain Abrasives, Inc. Abrasive tools and methods for forming same
US10189145B2 (en) 2015-12-30 2019-01-29 Saint-Gobain Abrasives, Inc. Abrasive tools and methods for forming same

Also Published As

Publication number Publication date
EP0236877A3 (en) 1989-06-07
DE3777675D1 (de) 1992-04-30
ATE74049T1 (de) 1992-04-15
EP0236877B1 (fr) 1992-03-25
DE3607661A1 (de) 1987-09-10

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