EP2623264A2 - Meule de ponçage, en particulier pour le ponçage longitudinal ou transversal - Google Patents

Meule de ponçage, en particulier pour le ponçage longitudinal ou transversal Download PDF

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Publication number
EP2623264A2
EP2623264A2 EP13151133.9A EP13151133A EP2623264A2 EP 2623264 A2 EP2623264 A2 EP 2623264A2 EP 13151133 A EP13151133 A EP 13151133A EP 2623264 A2 EP2623264 A2 EP 2623264A2
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
section
abrasive
wheel according
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
EP13151133.9A
Other languages
German (de)
English (en)
Other versions
EP2623264A3 (fr
EP2623264B1 (fr
Inventor
Egon Evertz
Ralf Evertz
Stefan Evertz
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.)
Egon Evertz KG GmbH and Co
Original Assignee
Egon Evertz KG GmbH and 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 Egon Evertz KG GmbH and Co filed Critical Egon Evertz KG GmbH and Co
Publication of EP2623264A2 publication Critical patent/EP2623264A2/fr
Publication of EP2623264A3 publication Critical patent/EP2623264A3/fr
Application granted granted Critical
Publication of EP2623264B1 publication Critical patent/EP2623264B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24D5/02—Wheels in one piece
    • B24D5/04—Wheels in one piece with reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
    • 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
    • B24D5/08—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 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
    • B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the invention relates to a grinding wheel, in particular for longitudinal or transverse grinding, with an inner core portion and an outer annular grinding portion, which are connected to each other, wherein the grinding portion consists of a granular abrasive material.
  • a grinding wheel of this type is used for example in the DE 601 13 319 T2 described.
  • the surface is processed by grinding, in order to remove any defects there, such as voids.
  • a grinding wheel is used, the grinding section contains grains as abrasives, with which a machining with geometrically indeterminate cutting is feasible.
  • the choice of the abrasive grains depends on the workpiece to be machined, usually the abrasive grains should have a high hardness, a sufficient toughness and heat resistance and a suitable grain size and grain shape.
  • Frequently used abrasive grains are made of corundum (alumina), silicon carbide, cubic boron nitride, or diamond, and the above-mentioned abrasive materials are mentioned in order of increasing hardness.
  • the shape of the abrasive grains and their particle sizes depend on the type of processing, namely whether it is a so-called rough grinding, rough grinding or finish grinding or Feinstschleifen.
  • the grinding wheel is rotated at a relatively high speed during the grinding process, whereby grinding speeds of 80 m / s or more are usual. Such grinding speeds result in considerable centrifugal forces, which require high safety measures.
  • a particular danger to the operating staff is the relatively high sensitivity to breakage of the grinding wheels, which can lead to detachment of individual large pieces of the grinding wheels or even grinding segment segments.
  • the necessary precautions namely a balance of the grinding wheel, a sound sample before use, a careful clamping of the grinding wheel and a housing in a protective hood, the durability of the grinding wheel comes a large Meaning too. In particular, the breaking off of individual abrasive section segments or larger abrasive section parts must be effectively avoided.
  • a grinding wheel according to claim 1 wherein according to the invention at least the grinding section, preferably the grinding section and the core section, based on the total mass of the grinding section 0.15% to 1%, preferably 0.2% to 0, 4%, plastic or glass fibers.
  • glass fibers having a length of 5 mm to 15 mm and a thickness of 0.8 mm to 1.2 mm are used.
  • the grinding wheels discussed here have a standardized diameter of 615 mm with a width of 79 mm and an inner bore in the middle of the core section of 203 mm.
  • the core section diameter is 340 mm.
  • the weight of such a grinding wheel including embedded iron reinforcement rings is about 63 kg.
  • the substantially cylindrical outer casing of the core section has individual grooves or singular recesses and the cylindrical inner casing of the grinding section has individual ribs or singular elevations.
  • the ribs or singular protrusions each engage in the grooves or singular depressions of the core portion, resulting in an effective "gearing" between the core portion and the abrasive portion.
  • the corresponding grooves, depressions or elevations can be easily formed in the cold pressing.
  • all common abrasives can be used in the context of the present invention, preferably Al 2 O 3 , SiC, CBN, ZrO 2 , diamond or mixtures of the abovementioned substances, wherein the grain size should be at most 1 mm in diameter.
  • the core section and the cutting section should each have the same thermal expansion coefficients. At most, the coefficients of expansion may differ by a maximum of 5%. By this measure it is achieved that during heating of the grinding wheel during operation stresses between the core region and the grinding section are largely avoided.
  • the core section and the abrasive section may, in principle, be made of the same material or of a different material, apart from the abrasive grain.
  • the abrasive section may comprise a metal or metal alloy matrix or a thermosetting resin, wherein the granular abrasives and the plastic or glass fibers are embedded in at least substantially homogeneous distribution.
  • the core section may consist essentially of metal or metal alloys, to which fillers are optionally added. In particular, under certain circumstances, the core section can be used several times, ie that after a wear of the grinding section of the abrasive section body separated from the core portion and then a new grinding section is formed.
  • the core portion (preferably as well as the abrasive portion) may include a thermosetting resin as well as crosslinking agents and fillers.
  • Fillers may be, for example, powdered SiC, Al 2 O 3 , bauxite, graphite or molybdenum sulfide.
  • the core section and then the cutting section are produced by cold pressing.
  • the thus-formed green body of core and abrasive section already has the grooves and ribs, the mesh in the manner of the tongue and groove principle (or alternatively, singular depressions and singular pin).
  • the contiguous green compact is finally heated to 180 ° C to 200 ° C and pressed to the desired final size.
  • the pressing pressures are for example 7 x 10 7 Pa (700 bar).
  • Grinding wheels of the type according to the invention consist of a core section 10 and a grinding section 11.
  • the outer diameter of the grinding section is 615 mm and the Fig. 2 apparent width of the grinding wheel 79 mm.
  • core portion 10 is disposed radially inward with its inner and outer surfaces abutting and interconnected.
  • Fig. 3 As can be seen, a type of gearing between the core portion and the abrasive portion can be provided by having the core portion having individual radially projecting ribs 12 which engage grooves 13 of the abrasive portion. Alternatively, and as shown in the left half of the grinding wheel, individual elevations 14 and depressions 15 can be used.
  • Such protrusions or grooves are already formed by pre-pressing in the manufacture of the green compact, so that the composite body, consisting of pre-pressed core section and pre-pressed grinding section placed in a mold and finally heated to 180 ° C to 200 ° C and pressed to a final size.
  • the abrasive section has, in addition to the matrix material, in which the abrasive grains, for example of aluminum oxide, embedded, a mass fraction of 0.15% to 1.0% plastic or glass fibers.
  • the abrasive grains for example of aluminum oxide
  • the abrasive grains for example of aluminum oxide
  • a mass fraction of 0.15% to 1.0% plastic or glass fibers about 100 g of glass fibers having an average length of 10 mm and a thickness of 1 mm were used as a total weight for the core section and the grinding section.
  • the glass fibers have been homogeneously mixed.
  • the core section had a total weight of 12 kg, whereas the abrasive section had a powder weight of 49.5 kg.
  • two additional iron rings have been embedded, the weight of which is 1.0 kg, resulting in a total weight of 62.5 kg for the grinding wheel.
  • the glass fiber content was approximately 0.17% of the weight of the abrasive section and the core section.
  • the grinding wheel was tested at speeds of 140 m / sec, without any breakouts of larger parts of the grinding section or hairline cracks, which could lead to later breakouts, being detected.
  • the targeted addition of the glass fibers can thus be achieved, in contrast to those grinding wheels whose grinding sections did not contain glass fibers, a significant improvement in the strength of the grinding wheel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP13151133.9A 2012-02-06 2013-01-14 Meule de ponçage, en particulier pour le ponçage longitudinal ou transversal Active EP2623264B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012002105A DE102012002105A1 (de) 2012-02-06 2012-02-06 Schleifscheibe, insbesondere zum Längs- oder Querschleifen

Publications (3)

Publication Number Publication Date
EP2623264A2 true EP2623264A2 (fr) 2013-08-07
EP2623264A3 EP2623264A3 (fr) 2017-08-23
EP2623264B1 EP2623264B1 (fr) 2021-07-28

Family

ID=47603294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13151133.9A Active EP2623264B1 (fr) 2012-02-06 2013-01-14 Meule de ponçage, en particulier pour le ponçage longitudinal ou transversal

Country Status (4)

Country Link
US (1) US20130203326A1 (fr)
EP (1) EP2623264B1 (fr)
CN (1) CN103240684A (fr)
DE (1) DE102012002105A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107398837A (zh) * 2017-09-19 2017-11-28 广东新吉欣实业有限公司 研磨轮及其制造工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103770030A (zh) * 2013-12-31 2014-05-07 郑州磨料磨具磨削研究所有限公司 轧辊高速磨削用树脂结合剂超硬材料砂轮及其制备方法
CN105856081B (zh) * 2016-05-16 2018-06-01 郑州磨料磨具磨削研究所有限公司 一种微钻用精磨超硬砂轮及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60113319T2 (de) 2000-03-02 2006-06-22 Noritake Co., Ltd., Nagoya Harzgebundene Schleifscheibe mit aus metallischem Material hergestelltem Kernteil

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3524286A (en) * 1967-04-12 1970-08-18 Carborundum Co Resin bonded abrasive wheels containing fibrous and non-fibrous fillers
BE759502A (fr) * 1969-11-28 1971-05-27 Bmi Lab Outil abrasif, en particulier meule de rectification, et son procede defabrication
DE2342217A1 (de) * 1973-08-21 1975-03-13 Swarovski Tyrolit Schleif Schleifscheibe
CN2033323U (zh) * 1988-05-01 1989-03-01 李芧华 软研磨头
AT396213B (de) * 1990-04-11 1993-07-26 Swarovski Tyrolit Schleif Schleifscheibe
JP3011431B2 (ja) * 1990-05-11 2000-02-21 三和研磨工業株式会社 精密研磨用砥石
US5449388A (en) * 1990-05-21 1995-09-12 Wiand; Ronald C. Injection molded abrasive article and process
JPH08112767A (ja) * 1994-10-18 1996-05-07 Daido Steel Co Ltd 鋼片手入れ用砥石および鋼片手入れ用研削方法
DE19526397A1 (de) * 1995-07-19 1997-01-23 Eisenblaetter Gerd Gmbh Kunststoffaser mit eingearbeitetem Schleifkorn
SK14402000A3 (sk) * 1998-03-27 2001-10-08 Norton Company Brúsny nástroj
DE10309021B4 (de) * 2003-02-21 2005-02-24 Schmirgelwerk Chemnitz Gmbh Schleifkörper
US7399330B2 (en) * 2005-10-18 2008-07-15 3M Innovative Properties Company Agglomerate abrasive grains and methods of making the same
BRPI0923722A2 (pt) * 2008-12-30 2017-07-11 Saint Gobain Abrasives Inc Ferramentas abrasivas coladas reforçadas

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60113319T2 (de) 2000-03-02 2006-06-22 Noritake Co., Ltd., Nagoya Harzgebundene Schleifscheibe mit aus metallischem Material hergestelltem Kernteil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107398837A (zh) * 2017-09-19 2017-11-28 广东新吉欣实业有限公司 研磨轮及其制造工艺

Also Published As

Publication number Publication date
EP2623264A3 (fr) 2017-08-23
EP2623264B1 (fr) 2021-07-28
US20130203326A1 (en) 2013-08-08
DE102012002105A1 (de) 2013-08-08
CN103240684A (zh) 2013-08-14

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