EP3569360A1 - Disque de meulage - Google Patents

Disque de meulage Download PDF

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Publication number
EP3569360A1
EP3569360A1 EP18172592.0A EP18172592A EP3569360A1 EP 3569360 A1 EP3569360 A1 EP 3569360A1 EP 18172592 A EP18172592 A EP 18172592A EP 3569360 A1 EP3569360 A1 EP 3569360A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
surface segments
recessed area
harder
grinding
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.)
Withdrawn
Application number
EP18172592.0A
Other languages
German (de)
English (en)
Inventor
Marijke VAN DER MEER
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 Innovative Properties Co
Original Assignee
3M Innovative Properties 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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to EP18172592.0A priority Critical patent/EP3569360A1/fr
Priority to EP19734883.2A priority patent/EP3793774A1/fr
Priority to PCT/IB2019/054039 priority patent/WO2019220373A1/fr
Priority to CN201980032630.8A priority patent/CN112135711A/zh
Priority to US17/052,876 priority patent/US20210069867A1/en
Publication of EP3569360A1 publication Critical patent/EP3569360A1/fr
Withdrawn legal-status Critical Current

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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
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D5/063—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with segments embedded in a matrix which is rubbed away during the grinding process
    • 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
    • B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the invention relates to a grinding wheel for material-removing machining at least one workpiece, preferably grinding wheel for simultaneous material-removing machining of at least two flat workpieces, wherein the grinding wheel is provided with a base body and an abrasive coating thereon for the abrasive machining of the at least one workpiece, and wherein the abrasive coating comprises a plurality of surface segments, wherein both in the circumferential direction and in the radial direction in each case a plurality of surface segments are provided.
  • grinding wheels are known in which the hardness of the surface segments is tailored to the particular application.
  • grinding wheels with harder surface segments for machining hard workpieces such.
  • hardened steel and grinding wheels with less hard surface segments for the processing of less hard workpieces such.
  • copper known.
  • hardness is used as a term for the modulus of elasticity of the material, since the modulus of elasticity correlates with the "hardness” (in the vernacular sense) of an abrasive article as a measure of wear resistance.
  • harder means a higher modulus of elasticity and “less hard” or “softer” denotes a lower modulus of elasticity.
  • the modulus of elasticity should be in the range of 40GPa to 120GPa, preferably 70GPa to 105GPa, for the presently relevant application.
  • the modulus of elasticity for determining these values is determined by the resonance method, also called acoustic hardness testing.
  • the determination of the modulus of elasticity is carried out according to DIN EN 843-2 (2006).
  • the natural frequency of a sample body is used in conjunction with sample dimensions and further material characteristic (density) to calculate the elastic modulus.
  • the specimen is brought into direct contact with a piezo transducer and vibrated steadily over a fixed frequency spectrum (maximum between 100 Hz to 100 kHz) [DIN EN 843-2 (2006)]. If the excitation frequency corresponds to the fundamental frequency of the sample, resonance oscillation with maximum amplitude occurs. In this way, the natural frequency can be determined with the aid of a further piezoelectric sensor. This is used for a downstream elastic modulus calculation according to DIN EN 843-2 (2006).
  • the measuring device used for this purpose may be, for example, a ZVUK 130 (supplier: ABRASIV, a.s., Pod Borkem 312, 293 01 Mlada Boleslav, Czech Republic).
  • a disadvantage of the previously known grinding wheels that in practice there are situations in which in a short time sequence alternately for a hard workpieces, but on the other less hard workpieces must be edited. As a result, either different grinding wheels are used in each case and insofar as appropriate conversions of the grinding machine used must take place. In addition to the increased financial costs for the provision of the various grinding wheels, the setup times also lead to a reduced service life of the grinding machine, which also represents a financial impact.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide a grinding wheel with which both harder and softer workpieces can be processed with good machining results and good wear behavior of the grinding wheel.
  • the abrasive coating comprises at least two different types of surface segments, which are formed differently hard.
  • the different surface segments of the grinding wheel in a still unused grinding wheel the same height and remain at the same height by a uniform wear of the surface segments.
  • no two different grinding wheels or sets of grinding wheels are required and corresponding time losses due to the conversion of the grinding machine are eliminated.
  • the performance with regard to removal is virtually unchanged with only slightly increased wear of the grinding wheel.
  • the roughness of the generated workpiece surface which is also adversely affected by scratches of material shards in the abrasive coating of the grinding wheel, is improved over a grinding wheel, which has only surface segments with the high hardness.
  • At least a first group of harder surface segments and a second group of softer surface segments can be provided.
  • the hardness of the respective surface segments is influenced by the bond (usually by means of a glass frit) and the type and proportion of the grain (for example diamond or CBN), furthermore by the proportion of the binder (eg glass frit) and the fraction of a secondary grain, such as B. alumina.
  • the ratios of different hard surface segments to each other may be arbitrary, for example, a distribution harder surface segments / softer surface segments from 20% / 80% to 80% / 20% possible.
  • the distribution may be 30% / 70% to 70% / 30%.
  • the proportion of harder surface segments may always be higher than the proportion of softer surface segments or vice versa.
  • the harder surface segments may have a hardness which is at least 5% harder than the hardness of the softer surface segments, preferably 10% to 20% harder than the hardness of the softer surface segments.
  • At least a portion of the surface segments may be formed either circular or annular or hexagonal.
  • the entirety of the surface segments may form an entire surface without a high proportion of free spaces between the surface segments.
  • At least a part of the surface segments may be formed quadrangular with straight and / or curved side edges.
  • At least two adjacent surface segments may be defined by a recessed area, e.g. B. in the form of a groove, be separated from each other.
  • the recessed areas can also be used, for example, for receiving / removing coolant and / or lubricant.
  • At least one recessed region in the radial direction can extend over the entire radial extent of the grinding wheel and / or at least a recessed area seen in the radial direction only over a portion of the radial extent of the grinding wheel rich.
  • adjacent surface segments may be disposed immediately adjacent one another (i.e., "on edge").
  • At least one recessed area may extend radially or in the form of an involute.
  • At least one recessed area preferably each recessed area, with a filler such.
  • a filler such as epoxy resin, at least partially, preferably completely, be filled.
  • At least one recessed area preferably each recessed area, can have a width of at least 1 mm, preferably 3 mm to 5 mm.
  • At least one harder surface segment and also at least one softer surface segment can be provided at each radial position of the grinding wheel in the circumferential direction. This ensures that the desired machining result can be achieved with each radial position of the grinding wheel.
  • the portion occupied by the at least one harder surface segment and the portion occupied by the at least one softer surface segment can be approximately uniform at any radial position of the grinding wheel.
  • the material thickness of the surface segments can be at least 3 mm, preferably 5 mm to 10 mm.
  • the depth of the recessed areas may correspond to the material thickness of the surface segments or at least be slightly smaller.
  • the invention further relates to a grinding wheel set with two grinding wheels for simultaneous material-removing machining of both sides of at least two flat workpieces.
  • Another object of the invention is to the extent to avoid the disadvantages mentioned above and to provide a grinding wheel set, with both harder and softer workpieces can be edited with good machining results and good wear behavior of the grinding wheels of Schleifusionnsatzes.
  • This object is achieved in a generic grinding wheel set in that at least one grinding wheel is a grinding wheel according to the invention, preferably both grinding wheels are each a grinding wheel according to the invention.
  • the sole FIGURE shows a grinding wheel 1, which has a base body and an abrasive coating arranged thereon for the abrasive machining of at least one workpiece not shown in the drawing.
  • the abrasive coating comprises a plurality of surface segments 2, 3, which are formed hexagonal in the embodiment shown, wherein in each case a plurality of surface segments are provided both in the circumferential direction and in the radial direction.
  • Respective adjacent surface segments 2, 3 are separated from one another by a recessed region 4 in the form of a groove.
  • the recessed region 4 extends in the radial direction over the entire radial extent of the grinding wheel 1.
  • the grinding wheel 1 further comprises a main body 5, on which the surface segments 2, 3 are preferably attached by gluing.
  • the surface elements 2, 3 of the abrasive coating are divided into two different types surface segments 2, 3, which are formed differently hard, and include a first group of harder surface segments 2 and a second group softer surface segments.
EP18172592.0A 2018-05-16 2018-05-16 Disque de meulage Withdrawn EP3569360A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18172592.0A EP3569360A1 (fr) 2018-05-16 2018-05-16 Disque de meulage
EP19734883.2A EP3793774A1 (fr) 2018-05-16 2019-05-15 Meule
PCT/IB2019/054039 WO2019220373A1 (fr) 2018-05-16 2019-05-15 Meule
CN201980032630.8A CN112135711A (zh) 2018-05-16 2019-05-15 研磨轮
US17/052,876 US20210069867A1 (en) 2018-05-16 2019-05-15 Grinding wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18172592.0A EP3569360A1 (fr) 2018-05-16 2018-05-16 Disque de meulage

Publications (1)

Publication Number Publication Date
EP3569360A1 true EP3569360A1 (fr) 2019-11-20

Family

ID=62186329

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18172592.0A Withdrawn EP3569360A1 (fr) 2018-05-16 2018-05-16 Disque de meulage
EP19734883.2A Withdrawn EP3793774A1 (fr) 2018-05-16 2019-05-15 Meule

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19734883.2A Withdrawn EP3793774A1 (fr) 2018-05-16 2019-05-15 Meule

Country Status (4)

Country Link
US (1) US20210069867A1 (fr)
EP (2) EP3569360A1 (fr)
CN (1) CN112135711A (fr)
WO (1) WO2019220373A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331646A1 (de) * 1972-08-08 1974-02-28 Evertz Egon Schleifkoerper
JPH08132349A (ja) * 1994-11-02 1996-05-28 Noritake Dia Kk 研磨工具
CN202357057U (zh) * 2011-10-20 2012-08-01 北京荣锋精密工具有限公司 一种用于磨陶瓷阀芯的微晶玻璃结合剂金刚石双端面砂轮
WO2017217108A1 (fr) * 2016-06-13 2017-12-21 バンドー化学株式会社 Abrasif

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934983A (en) * 1996-04-08 1999-08-10 Kabushiki Kaisha Kobe Seiko Sho Double-side grinding method and double-side grinder
AU732575B2 (en) * 1998-03-27 2001-04-26 Norton Company Abrasive tools
JP2003117833A (ja) * 2001-10-15 2003-04-23 Shin Etsu Chem Co Ltd 研磨加工板
US20060172665A1 (en) * 2003-03-14 2006-08-03 Katsuya Okumura Polishing tool and polishing apparatus
KR101170129B1 (ko) * 2009-03-31 2012-07-31 엠.씨.케이 (주) 복수의 물성을 갖는 연마용 패드의 제조방법
CN202964426U (zh) * 2012-12-05 2013-06-05 修明 砂轮
US10068602B2 (en) * 2013-06-29 2018-09-04 Hoya Corporation Method for manufacturing glass substrate, method for manufacturing magnetic disk, and polishing liquid composition for glass substrate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331646A1 (de) * 1972-08-08 1974-02-28 Evertz Egon Schleifkoerper
JPH08132349A (ja) * 1994-11-02 1996-05-28 Noritake Dia Kk 研磨工具
CN202357057U (zh) * 2011-10-20 2012-08-01 北京荣锋精密工具有限公司 一种用于磨陶瓷阀芯的微晶玻璃结合剂金刚石双端面砂轮
WO2017217108A1 (fr) * 2016-06-13 2017-12-21 バンドー化学株式会社 Abrasif

Also Published As

Publication number Publication date
WO2019220373A1 (fr) 2019-11-21
US20210069867A1 (en) 2021-03-11
EP3793774A1 (fr) 2021-03-24
CN112135711A (zh) 2020-12-25

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