EP1866127B1 - Trennschleifscheibe - Google Patents

Trennschleifscheibe Download PDF

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Publication number
EP1866127B1
EP1866127B1 EP06710577A EP06710577A EP1866127B1 EP 1866127 B1 EP1866127 B1 EP 1866127B1 EP 06710577 A EP06710577 A EP 06710577A EP 06710577 A EP06710577 A EP 06710577A EP 1866127 B1 EP1866127 B1 EP 1866127B1
Authority
EP
European Patent Office
Prior art keywords
wheel
abrasive
rotation
disk
line
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.)
Not-in-force
Application number
EP06710577A
Other languages
English (en)
French (fr)
Other versions
EP1866127A1 (de
Inventor
Klaus Erles
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.)
Heger GmbH European Diamond Tools
Original Assignee
Heger GmbH European Diamond Tools
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 Heger GmbH European Diamond Tools filed Critical Heger GmbH European Diamond Tools
Publication of EP1866127A1 publication Critical patent/EP1866127A1/de
Application granted granted Critical
Publication of EP1866127B1 publication Critical patent/EP1866127B1/de
Not-in-force 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
    • B24D5/12—Cut-off wheels
    • 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
    • B24D5/12—Cut-off wheels
    • B24D5/123—Cut-off wheels having different cutting segments

Definitions

  • the present invention relates to an abrasive cutoff wheel defined in the preamble of claim 1 to cut off building materials, in particular concrete, bricks, roof tiles, and to cut apart natural stone.
  • a cut-off wheel is disclosed in US-A-3 064 399 .
  • a abrasive cutoff wheel of this kind is known form the German patent document DE 44 24 093 C2 . It comprises both a central disk and segments.
  • the segments are undetachably affixed by laser welding to the central disk circumference which is continuous or which is sub-divided by circumferential clearances into projecting tabs.
  • the line connecting the segments and the outer contour of the central disk runs tangentially to the central disk origin or is constituted by two corresponding tangential straight lines for each segment, said two lines subtending, in roof-like manner, between them an angle of less than 180°.
  • the objective of the present invention is abrasive cutoff-wheel improvement.
  • the disk junction face and the segment junction face affixed to it subtend a straight bonding line which, along a predetermined direction of wheel rotation, slopes inward toward the wheel center of rotation while deviating from a tangent line.
  • the invention offers improved distribution of forces at the bonding line between the abrasive segments and the central disk, allowing higher loading on the abrasive cutoff wheel.
  • the present invention converts a substantial portion of the shearing forces arising in the dry severing method into compressive forces that are applied in the bonding line between the abrasive segments and the central disk.
  • each abrasive segment is straight when seen in wheel side view and this outer surface of each segment defines a surface line sloping inward in the direction of disk rotation toward the center of the wheel, deviating from a tangent line.
  • the abrasive segments are composed of at least in their top zones of an imbedding material containing imbedded diamond elements illustratively sintered into said imbedding material.
  • an abrasive cutoff wheel Before an abrasive cutoff wheel is used for the first time, the diamond elements do not protrude from the imbedding material, so that the abrasive cutoff wheel must be honed before or by means of first use to assure the diamond elements shall project above the imbedding material.
  • the surface line and the bonding line of the particular abrasive segment are always mutually parallel.
  • the central disk is fitted with one circumferential notch between all adjoining disk junction faces. In this manner material abraded from a workpiece more easily escapes from the notch formed in the workpiece.
  • Fig. 1 is a sector-like cutaway of a sideview of an abrasive cutoff wheel of the invention.
  • the abrasive cutoff wheel of the invention shown in Fig. 1 substantially comprises a circular central disk 2 and a plurality of abrasive segments 4.
  • the abrasive segments 4 are distributed preferably symmetrically along the full outer circumference of the central disk 2 on the same plurality of straight (as seen in wheel sideview) disk junction faces 6 and each segment is fitted with its own segment junction face 8 that is undetachably joined, for instance by brazing, welding or laser processing, to one of the disk junction faces 6.
  • the central disk 2 preferably is made of steel.
  • the abrasive cutoff wheel of the invention does its cutoff work in a predetermined direction of rotation 12.
  • Each disk junction face 6 and the segment junction face 8 joined to it determine between them a straight bonding line 10 (as seen in wheel sideview), this bonding line sloping inward along the predetermined direction of wheel rotation 12, relative to wheel center of rotation 14, that is, deviating from a line tangent to the wheel center of rotation.
  • a conceptual radial line from the wheel center of rotation 14 to the center (in sideview) of a disk junction face 6 subtends an angle with said surface 6 that deviates from 90°.
  • each abrasive segment 4 is straight when seen in wheel sideview and defines a straight surface line 20 which as seen in wheel sideview slants in the direction of rotation of the wheel toward the wheel center of rotation 14, deviating from a tangent line.
  • the surface line 20 and the bonding line 10 of the particular abrasive segment 4 preferably are mutually parallel.
  • the central disk 2 is fitted with a circumferential notch 22 respectively 24.
  • the circumferential notches 22 and 24 differ in depth, a deeper circumferential notch 24 and a shallower circumferential notch 22 alternating along the circumference.
  • the configuration of circumferential notches of different depths lowers the danger of cracks in the central disk.
  • a spacer gap 26 is subtended in all embodiment modes of the invention between the circumferentially sequential abrasive segments 4 to facilitate eliminating ground material when grinding the workpiece.
  • the bonding line 10 and a radial line 30 subtend an angle deviating from 90° at least at the longitudinal center point of the disk junction face 6, preferably however also at any other point along the length of the segment junction face 8.
  • the angle ⁇ situated in the predetermined wheel direction of rotation 12 in front of the radial line 30 is less than 90° and the angle ⁇ situated behind is larger than 90°.
  • the circumferential notches 22 and 24 preferably are slots open at the outer central disk circumference. Said notches subtend a defined angle ⁇ preferably larger than 90° with the connecting line 10, respectively the disk junction surface 6, preceding them in the wheel's direction of rotation 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (3)

  1. Trennschleifscheibe, umfassend: eine Kernscheibe (2) und mehrere Schleifsegmente (4), die um den Umfang der Kernscheibe (2) auf die gleiche Anzahl von, in Scheiben-Seitenansicht gesehen, geradlinigen Scheibenanschlussflächen (6) verteilt sind und jeweils eine Segmentanschlussfläche (8) aufweisen, welche an nur einer der Scheibenanschlussflächen (6) unlösbar befestigt ist,
    wobei die Trennschleifscheibe in eine vorbestimmte Drehrichtung (12) angetrieben wird, jede Scheibenanschlussfläche (6) und die an ihr befestigte Segmentanschlussfläche (8), in Scheiben-Seitenansicht gesehen, eine gerade Verbundlinie (10) bilden, die in der vorbestimmten Drehrichtung (12) in Richtung des Scheibendrehmittelpunkts (14) nach innen geneigt ist, wobei sie von einer Tangentiallinie abweicht, dadurch gekennzeichnet, dass die radial äußere Oberfläche (18) von jedem Schleifsegment (4), in Scheiben-Seitenansicht gesehen, geradlinig ist und eine gerade Oberflächenlinie (20) definiert, die in Richtung des Scheibendrehmittelpunkts (14) nach innen geneigt ist, wobei sie von einer Tangentiallinie abweicht, und dass
    die Oberflächenlinie (20) und die Verbundlinie (10) des betreffenden Schleifsegments (4) parallel zueinander sind.
  2. Trennschleifscheibe nach Anspruch 1, dadurch gekennzeichnet, dass die Kernscheibe (2) zwischen jeweils zwei einander benachbarten Scheibenanschlussflächen (6) einen Umfangseinschnitt (22, 24) aufweist.
  3. Trennschleifscheibe nach Anspruch 2, dadurch gekennzeichnet, dass die Umfangseinschnitte (22, 24) unterschiedlich tief sind, wobei in Scheibenumfangsrichtung abwechselnd ein tieferer Umfangseinschnitt (24) und ein weniger tiefer Umfangseinschnitt (22) vorgesehen sind.
EP06710577A 2005-04-05 2006-03-22 Trennschleifscheibe Not-in-force EP1866127B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005015503A DE102005015503A1 (de) 2005-04-05 2005-04-05 Trennschleifscheibe
PCT/IB2006/000638 WO2006106391A1 (en) 2005-04-05 2006-03-22 Cut-off wheel

Publications (2)

Publication Number Publication Date
EP1866127A1 EP1866127A1 (de) 2007-12-19
EP1866127B1 true EP1866127B1 (de) 2011-05-18

Family

ID=36613448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06710577A Not-in-force EP1866127B1 (de) 2005-04-05 2006-03-22 Trennschleifscheibe

Country Status (9)

Country Link
EP (1) EP1866127B1 (de)
KR (1) KR101279144B1 (de)
CN (1) CN100593458C (de)
AT (1) ATE509733T1 (de)
AU (1) AU2006232003B2 (de)
CA (1) CA2603270C (de)
DE (2) DE202005021802U1 (de)
ES (1) ES2366376T3 (de)
WO (1) WO2006106391A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006997A1 (de) * 2007-02-14 2008-08-21 Robert Bosch Gmbh Trennscheibe für Werkzeugmaschinen
CN115122164B (zh) * 2022-05-10 2024-08-20 青岛琛达精密机械有限公司 一种工业使用的配件加工组件及设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064399A (en) * 1958-08-04 1962-11-20 Norton Co Diamond cut-off wheel
JPS57208262A (en) * 1981-06-18 1982-12-21 Ibm Drop-on demand type ink jet printing method
JPS59110563A (ja) * 1982-12-17 1984-06-26 Asahi Daiyamondo Kogyo Kk ダイヤモンド切断「と」石
DE4424093C2 (de) 1993-07-13 2000-03-30 Karlheinz Dietel Segmenttrennschleifscheibe
EP0679486A1 (de) * 1994-04-30 1995-11-02 Friedrich Busse Diamantwerkzeuge GmbH + Co. KG Werkzeug zur Bearbeitung von Stahlbeton, Naturstein o.dgl., z.B. Bohrkrone oder Schneidscheibe
DE19908037B4 (de) * 1998-08-07 2006-04-13 Tawakoli, Taghi, Prof. Dr.-Ing. Werkzeug zur Materialbearbeitung

Also Published As

Publication number Publication date
CN100593458C (zh) 2010-03-10
CN101151125A (zh) 2008-03-26
KR101279144B1 (ko) 2013-06-26
WO2006106391A1 (en) 2006-10-12
DE102005015503A1 (de) 2006-10-12
CA2603270A1 (en) 2006-10-12
ATE509733T1 (de) 2011-06-15
AU2006232003B2 (en) 2011-03-17
ES2366376T3 (es) 2011-10-19
WO2006106391A8 (en) 2007-11-08
AU2006232003A1 (en) 2006-10-12
EP1866127A1 (de) 2007-12-19
DE202005021802U1 (de) 2010-03-04
KR20070120516A (ko) 2007-12-24
CA2603270C (en) 2011-07-05

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