EP0239918A2 - Schleifscheibe - Google Patents

Schleifscheibe Download PDF

Info

Publication number
EP0239918A2
EP0239918A2 EP87104352A EP87104352A EP0239918A2 EP 0239918 A2 EP0239918 A2 EP 0239918A2 EP 87104352 A EP87104352 A EP 87104352A EP 87104352 A EP87104352 A EP 87104352A EP 0239918 A2 EP0239918 A2 EP 0239918A2
Authority
EP
European Patent Office
Prior art keywords
core
abrasive
rim
aluminum
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.)
Granted
Application number
EP87104352A
Other languages
English (en)
French (fr)
Other versions
EP0239918B1 (de
EP0239918A3 (en
Inventor
Richard H. Sioui
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
Application filed by Norton Co filed Critical Norton Co
Publication of EP0239918A2 publication Critical patent/EP0239918A2/de
Publication of EP0239918A3 publication Critical patent/EP0239918A3/en
Application granted granted Critical
Publication of EP0239918B1 publication Critical patent/EP0239918B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B24D7/02—Wheels in one piece
    • B24D7/04—Wheels in one piece with reinforcing means
    • 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

Definitions

  • the invention relates to grinding wheels having a non-abrasive core supporting an abrasive containing rim, in particular, a super abrasive material in which the rim abrasive section contains active filler material and silver powder.
  • Diamond grit or CBN grit containing grinding wheels are customarily made with an abrasive rim section and a supporting core.
  • the core is desireably an organic polymer filled with a metal powder.
  • Aluminum is a particularly desireable filler metal for the core because of its relatively low density, high conductivity, and low cost.
  • U.S. Patent 3,868,233 teaches that such cores may employ aluminum, copper, or a mixture of aluminum and copper as a filler.
  • gra­phite has been employed to facilitate dressing away of the core material near the abrasive rim in cup-type wheels.
  • Such wheels may employ the graphite additive only in the portion of the core adjacent to the abrasive rim.
  • the use of active fillers in the abrasive rim section became commercially used to improve the grinding of ferrous and other metals.
  • Such fillers which improve the grindability of the metal work piece may also be used in cases where diamond is the abrasive, or where a blend of diamond and CBN is used.
  • Secondary, non premium abrasives may also be used.
  • the diamond and CBN are preferably metal clad. Nickel is a common cladding.
  • the effective solution was found to be a substitution of copper for the aluminum in the core at those portions of the core immediately adjacent the abrasive containing section, while retaining aluminum filler in the major portion of the core.
  • figure 1 shows a straight wheel with a composite core 10 of the aluminum filled resin, with a non-aluminum section 11 adjacent to the abrasive rim 12, and a mounting hole 13.
  • Figure 2 shows a cup-type wheel with an aluminum filled core 20, and non-aluminum filled portion 21, an abrasive rim 22, and a mounting hole 23.
  • the core was formed in a mold oriented such that the portion cup shaped core which will be adjacent to the CBN section in the bottom.
  • Sufficient copper filled resin powder to build the section 21 in Figure 2 is placed in the mold, hand packed, and leveled.
  • the aluminum powder containing resin is then placed on top, packed and leveled.
  • the entire assembly is then pressed and the core removed from the mold.
  • the lower portion of the core is then shaped on a lathe to provide a recess into which the drive rim section fits in a subsequent molding operation.
  • Typical molding conditions are 5 tons per square inch pressure, a temperature of 160°C., and a molding time of 20 minutes.
  • the final cure can be carried out in an air atmosphere oven for 24 hours at 175°C.
  • the time and temperature of cure is varied to control the grade of hardness of the wheel depending upon the specific application.
  • Abrasive rims were fabricated containing CBN (cubic boron nitride) abrasive grits, nickel clad, 25% by volume (based on the CBN volume), and mounted on cores of different composition.
  • a suitable formulation for the bond and fillers for the rim is as follows:
  • the mix for the rim sections was prepared by wetting the CBN abrasive grit material with furfural and blending it with the mixture of bond and fillers. The mix was cold pressed to a shape in the recess in the cup, and the whole assembly cured by heat.
  • the core material may also contain graphite and other fillers.
  • a suitable core composition is taught in U.S. Patent 3,868,233.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP87104352A 1986-04-02 1987-03-24 Schleifscheibe Expired - Lifetime EP0239918B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84733486A 1986-04-02 1986-04-02
US847334 1986-04-02

Publications (3)

Publication Number Publication Date
EP0239918A2 true EP0239918A2 (de) 1987-10-07
EP0239918A3 EP0239918A3 (en) 1990-03-07
EP0239918B1 EP0239918B1 (de) 1993-01-27

Family

ID=25300367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104352A Expired - Lifetime EP0239918B1 (de) 1986-04-02 1987-03-24 Schleifscheibe

Country Status (6)

Country Link
EP (1) EP0239918B1 (de)
JP (1) JPH0671706B2 (de)
BR (1) BR8701479A (de)
CA (1) CA1324492C (de)
DE (1) DE3783791T2 (de)
ZA (1) ZA871902B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110321A (en) * 1990-02-13 1992-05-05 Minnesota Mining And Manufacturing Company Abrasives containing ammonium fluoride-based grinding aid
US5219463A (en) * 1990-02-13 1993-06-15 Minnesota Mining And Manufacturing Company Abrasives containing ammonium fluoride-based grinding aid
DE202017004776U1 (de) 2017-09-13 2017-10-10 Prime Supply Inc. Verbessertes Schleifwerkzeug
US11712775B2 (en) 2017-01-25 2023-08-01 Fives Landis Limited Machine tools and methods of operation thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1544643A1 (de) * 1964-08-14 1970-01-15 Bay State Abrasive Products Co Neuartiges Schleifmittel
US3592618A (en) * 1969-03-10 1971-07-13 Avco Corp Abrasive article having a metal filler and an active filler
US3816997A (en) * 1972-03-20 1974-06-18 Itek Corp Apparatus for simultaneously performing rough and fine grinding operations
US3984214A (en) * 1973-03-05 1976-10-05 Federal-Mogul Corporation Metal-coated diamond abrasive article containing metal fillers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55120980A (en) * 1979-03-13 1980-09-17 Toshiba Mach Co Ltd Grinder for vertical-axis plane grinding
JPS5641390A (en) * 1979-09-12 1981-04-18 Masami Fujii Anticorrosion method for earth electrode material of galvanized steel pipe
JPS5893456U (ja) * 1981-12-18 1983-06-24 株式会社東芝 研削砥石

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1544643A1 (de) * 1964-08-14 1970-01-15 Bay State Abrasive Products Co Neuartiges Schleifmittel
US3592618A (en) * 1969-03-10 1971-07-13 Avco Corp Abrasive article having a metal filler and an active filler
US3816997A (en) * 1972-03-20 1974-06-18 Itek Corp Apparatus for simultaneously performing rough and fine grinding operations
US3984214A (en) * 1973-03-05 1976-10-05 Federal-Mogul Corporation Metal-coated diamond abrasive article containing metal fillers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110321A (en) * 1990-02-13 1992-05-05 Minnesota Mining And Manufacturing Company Abrasives containing ammonium fluoride-based grinding aid
US5219463A (en) * 1990-02-13 1993-06-15 Minnesota Mining And Manufacturing Company Abrasives containing ammonium fluoride-based grinding aid
US11712775B2 (en) 2017-01-25 2023-08-01 Fives Landis Limited Machine tools and methods of operation thereof
DE202017004776U1 (de) 2017-09-13 2017-10-10 Prime Supply Inc. Verbessertes Schleifwerkzeug

Also Published As

Publication number Publication date
EP0239918B1 (de) 1993-01-27
EP0239918A3 (en) 1990-03-07
JPS62251079A (ja) 1987-10-31
DE3783791D1 (de) 1993-03-11
JPH0671706B2 (ja) 1994-09-14
ZA871902B (en) 1987-11-25
BR8701479A (pt) 1988-01-19
DE3783791T2 (de) 1993-05-19
CA1324492C (en) 1993-11-23

Similar Documents

Publication Publication Date Title
US4800685A (en) Alumina bonded abrasive for cast iron
US3984214A (en) Metal-coated diamond abrasive article containing metal fillers
KR100371979B1 (ko) 연마 공구, 드레싱 공구 및 드레싱 공구 제조 방법
JP3080305B2 (ja) コーティングされた超砥粒を有する研磨工具
JPS5882678A (ja) 粗組織有機物結合研削体
EP0482412B1 (de) Schleifmittel und Verfahren zu seiner Verwendung
JPS61100352A (ja) 研削工具
EP0239918B1 (de) Schleifscheibe
JP2002066928A (ja) ハイブリッド砥石及びその製造方法
US5139539A (en) Alumina bonded abrasive for cast iron
US4883501A (en) Alumina bonded abrasive for cast iron
US3087803A (en) Diamond grinding wheel and compositions therefor
JP2643401B2 (ja) 結合型研磨工具
US4988370A (en) Alumina bonded abrasive for cast iron
JPS6359827B2 (de)
JPS6211990B2 (de)
GB2136011A (en) Grinding wheel containing cubic boron nitride
EP0061035A2 (de) Harzgebundene Schleifscheibe
US5139536A (en) Alumina bonded abrasive for cast iron
CN111136580B (zh) 一种高硬度脆性材料加工用l形节块碗磨
US2117513A (en) Abrasive wheel and method of making the same
JPS59161269A (ja) 多孔性ビトリファイド窒化硼素砥石の製造方法
SU1463460A1 (ru) Масса дл изготовлени алмазно-абразивного инструмента
JPS6362346B2 (de)
GB1584411A (en) Abrasive-coated sharpening tool

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: B24D 3/34

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19900824

17Q First examination report despatched

Effective date: 19910704

ITTA It: last paid annual fee
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930127

Ref country code: FR

Effective date: 19930127

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19930127

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930311

Year of fee payment: 7

REF Corresponds to:

Ref document number: 3783791

Country of ref document: DE

Date of ref document: 19930311

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930315

Year of fee payment: 7

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020320

Year of fee payment: 16

Ref country code: GB

Payment date: 20020320

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031001

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030324