EP0530691A1 - Meule de rectification - Google Patents

Meule de rectification Download PDF

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Publication number
EP0530691A1
EP0530691A1 EP92114702A EP92114702A EP0530691A1 EP 0530691 A1 EP0530691 A1 EP 0530691A1 EP 92114702 A EP92114702 A EP 92114702A EP 92114702 A EP92114702 A EP 92114702A EP 0530691 A1 EP0530691 A1 EP 0530691A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
ring
carrier
slip ring
clamping
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
EP92114702A
Other languages
German (de)
English (en)
Other versions
EP0530691B1 (fr
Inventor
Karl Heinz Dr.-Ing. Virnich
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.)
August Rueggeberg GmbH and Co KG
Original Assignee
August Rueggeberg GmbH and Co KG
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 August Rueggeberg GmbH and Co KG filed Critical August Rueggeberg GmbH and Co KG
Publication of EP0530691A1 publication Critical patent/EP0530691A1/fr
Application granted granted Critical
Publication of EP0530691B1 publication Critical patent/EP0530691B1/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
    • 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 grinding wheel according to the preamble of claim 1.
  • grinding wheels of this type which can be designed as rough grinding wheels or as cutting grinding wheels
  • the grinding body is fixedly attached to the inner carrier having a hub.
  • Rough grinding wheels are only worn down to a range of 50 to 70% of the original diameter, i.e. overall, a significant proportion of the grinding wheel is not worn out. This unused portion is in the range of 30 to 50% of the original weight of the grinding wheel.
  • cut-off grinding wheels a considerable part of the grinding wheel is not consumed in the same way. The remainder of the remaining waste must be disposed of in hazardous waste landfills, which poses increasing problems as the number of hazardous waste landfills is declining and the cost of doing so is rising sharply.
  • the invention has for its object to provide a grinding wheel of the generic type in which the amount of waste to be disposed of is greatly reduced.
  • the center of the grinding wheel consists of a reusable carrier, which is usually made of metal. It can essentially have the contour of the center of conventional grinding wheels.
  • the grinding wheel is designed as an independent, replaceable slip ring. After the slip ring has been largely used up, only the remainder of the slip ring is removed from the carrier after the tensioning devices have been loosened, and a new slip ring is fitted and fastened again by means of the tensioning devices. Only this remaining remainder has to be disposed of.
  • Claims 4 to 6 represent a particularly preferred embodiment for a tension ring, claim 4 also indicating how the receptacle centering the slip ring is designed.
  • the claims 7, 8 and 9 represent two further configurations of the clamping ring in a corresponding manner.
  • the embodiment according to FIGS. 1 and 2 is a rough grinding wheel with a central carrier 1 made of metal and a rough grinding ring 2. It has a central axis of symmetry 3.
  • the carrier 1 has a hub 4 with an opening 5 concentric to the axis 3, which are used to fasten the grinding wheel in a conventional manner to a drive shaft of a grinding machine.
  • the rear side 6 of the hub 4 of the carrier 1, which is cranked out in relation to the slip ring 2 in the drawing below, is arranged adjacent to the machine.
  • the carrier 1 has in its outer region a receiving section 7 for the slip ring 2.
  • a cranked transition area 8 between the hub 4 and the receiving area 7 is provided with stiffening ribs 9 running essentially radially to the axis 3.
  • the receptacle 7 of the carrier 1 has a ring flange 10 in the area of the rear side 6 as an attachment for the rear side 11 of the slip ring 2.
  • the receiving area 7 also has a concentric to the axis 3 and then to the ring flange 10 on a serving as a receptacle cylindrical receiving surface 12, on which the slip ring 2 is attached, so that its inner peripheral surface 13 concentrically and practically free surrounds the receiving surface 12.
  • the slip ring 2 is thus centered on the cylindrical receiving surface 12 relative to the carrier 1 or its axis 3.
  • a clamping ring 14 designed as a flat washer is fastened with countersunk screws 15, which are screwed into threaded bores 16 in the receiving area 7 running parallel to the axis 3.
  • the clamping ring 14 lies flush with the front side 17 of the carrier 1, it is arranged in a corresponding annular recess 18 on the front side 17 of the receiving area 7.
  • the clamping ring 14 has a play 20 with respect to the base 19 of the recess 18. So that a clamping flange 28 of the clamping ring 14 is also essentially flush with the front 21 of the slip ring 2, an annular recess 22 for receiving the clamping flange 28 is formed in the front 21 adjacent to the inner circumferential surface 13, the recess 22 forming a clamping ring 14 has small radial play 23.
  • the roughing slip ring 2 is thus centered with its inner peripheral surface 13 on the receiving surface 12 of the receiving area 7 of the carrier 1 and releasably clamped between the clamping flange 28 and the ring flange 10.
  • the roughing slip ring 2 can be ground down to the residual circumferential surface 24 of the slip ring 2 shown in dashed lines, which connects the outer periphery 25 of the ring flange 10 and the outer periphery 26 of the clamping ring 14.
  • the inner radius of the slip ring 2 is denoted by ri, while its outer radius is denoted by ra.
  • the radial extension of the clamping flange 28 over the slip ring 2, that is to say the clamping width of the clamping flange 28 relative to the slip ring 2, is denoted by a, while the radial extension of the ring flange 10 relative to the slip ring 2 is denoted by b.
  • the following relationships apply: 0.01 (ra - ri) ⁇ a ⁇ 010 (ra - ri) 0.05 (ra-ri) ⁇ b ⁇ 0.25 (ra-ri). 0.35 ⁇ ri / ra ⁇ 0.65
  • the radial play 27 between the receiving surface 12 and the inner peripheral surface 13 of the slip ring 2 is up to 0.2 mm.
  • the same reference numerals are used. Insofar as there are functionally identical and structurally slightly differently designed parts, these are identified by the same reference number and a prime, without the need for a new description.
  • the essentially ring-cylindrical clamping ring 34 which is formed in one piece with the clamping flange 28, is thicker in the direction of the axis 3 than the disk-shaped clamping ring 14. It is arranged in a recess 18 'radially without play. It has bores 35 running parallel to axis 3, in each of which a locking bolt 36 is arranged.
  • Each locking bolt 36 has at its end facing the rear side 6 an approximately hook-shaped inclined locking surface 37 which is passed through a keyhole-shaped axis 38 in the base 19 'of the recess 18'.
  • its locking surface 37 engages with a corresponding likewise inclined counter surface 40 on the rear side 6 of the carrier 1 ', as a result of which the clamping ring 34 in the direction of the axis 3 and in the direction of the rear side 6 of the carrier 1' is clamped against the slip ring 2.
  • These locking bolts 36 can thus be locked or unlocked by a rotation of approximately 90 ° about their longitudinal axis 39. In this respect, locking or unlocking can be carried out more quickly than in the embodiment according to FIGS. 1 and 2.
  • the locking bolts 36 are rotated about their longitudinal axis 39 by a corresponding attack on their head 41, which also bears against the clamping ring 34.
  • the roughing slip rings 2 used in the exemplary embodiments according to FIGS. 1 to 3 essentially consist of synthetic resin as a binder, of fillers and of corundum or silicon carbide as an abrasive grain 42. To increase the breaking strength, one or more reinforcement layers 43 made of glass fiber fabric can be provided will. The part of the slip ring 2 located between the remaining peripheral surface 24 and the inner peripheral surface 13 is waste.
  • separating slip rings 44 are used which differ in their outer dimensions only in their thickness in the direction of the axis 3 from the slip rings 2. They have at least one reinforcing layer 43 and abrasive grain 42 and synthetic resin as a binder together with fillers.
  • the clamping ring 14 ′′ is formed by an essentially ring-cylindrical union nut 29, which can be screwed with an internal thread 30 onto an external thread 31 at the receiving area 7 ′′ of the carrier 1 ′′, this external thread 31 in a recess 18 ′′ of the carrier 1 '' is trained.
  • the clamping flange 28 ′′ is formed in one piece with the union nut 29. Blind holes 33 are provided, into which suitable tools for loosening or tightening the union nut 29 can be inserted.
  • annular recess 47 is also formed in the rear 45 of the separating slip ring 44, into which an appropriately thin ring flange 10 ′′ engages.
  • the clamping ring 14 ′′ is made relatively thin, so that on the one hand the separating slip ring 44 is not weakened too much in the area of its clamping between the ring flange 10 ′′ and the clamping ring 14 ′′, but on the other hand the ring flange 10 '' and the clamping ring 14 '' are flush with the separating slip ring 44, i.e. they do not protrude above it.
  • the transition area 8 ′′ of the support 1 ′′ to the near 4 ′′ is not cranked, that is, the entire cutting wheel according to FIG. 4 has the shape of a flat ring cylinder disk that is flat on both sides.
  • the cut-off slip ring 44 can be used approximately up to the area of the clamping flange 28 ′′ and the ring flange 10 ′′, ie there is a residual peripheral surface 24 ′′ in this area. This is due to the fact that during cut-off, the carrier 1 ′′ which does not protrude above the cut-off slip ring 44 can also be immersed in the material to be cut.
  • a part of a grinding machine 50 is shown which has a grinding spindle 51 which can be driven by a motor.
  • a receiving flange 52 is fastened in the usual way, which has an annular collar 53, which receives the ring-cylindrical carrier 1 '' 'centered.
  • the carrier 1 '' ' has on its outer peripheral edge a ring flange 10' '' against which the roughing slip ring 2 '' 'is centered. The centering thus takes place between the inner peripheral surface 13 of the roughing slip ring 2 '' 'and the cylindrical receiving surface 12' '' of the ring flange 10 '' '.
  • the clamping ring 14 ''' is designed as a largely closed washer, which is only provided in the area of the axis 3 with an internal thread 54 which corresponds to an external thread 55 of the grinding spindle 51.
  • the clamping ring 14 ′′ ′′ has bores 56 for the engagement of a clamping tool.
  • the clamping ring 14 ''' is provided with a receiving surface 12''' a of the same diameter as the receptacle 12 ''', which therefore also lies centered on the inner circumferential surface 13 of the slip ring 2'''.
  • the clamping flange 28 ''' is also formed in one piece with the clamping ring 14'''.
  • the radial extent a of the clamping flange 28 ′′ is equal to the radial extent c of the ring flange 10 ′′.
  • the relationship given above for a applies.
  • This version has the advantage that it can be mounted on all commercially available grinding machines without special clamping tools.
  • Fig. 6 it is indicated that the carrier 1 '' 'and the clamping ring 14' '' from the embodiment according to Fig. 5 can also be used without any change, a separating slip ring 44, as shown in Fig. 4 to clamp on the grinding spindle 51.
  • a separating slip ring 44 as shown in Fig. 4 to clamp on the grinding spindle 51.
  • the separating slip ring 44 can thus dive deep into a workpiece without the carrier 1 ′′ ′′ and the clamping ring 14 ′′ ′′ coming into collision with the workpiece.
  • the immersion can go as far as the receiving flange 52. This version is preferred for stationary grinding machines.
  • FIG. 7 shows a reinforcement layer 43 described in German patent application P 41 32 883.0, which is to be used with roughing slip rings 2, 2 '''or separating slip rings 44.
  • a reinforcement layer 43 is formed from one or more reinforcing threads 57, which optimally counteract tangential and radial expansions of the slip ring.
  • the reinforcing threads 57 run exactly tangentially; they then run radially-tangentially to the outer circumference and are deflected there and in turn returned in a straight line to the opening 58, where they are passed tangentially.
  • the greatest principal tension of a rotating slip ring runs in the tangential direction.
  • the tension has its highest value in the area of the opening 58, that is to say radially on the inside, which decreases continuously towards the outside.
  • the reinforcing threads 57 run exactly tangentially only in the area of the opening 58, but that they receive a radial component between the opening 58 and the outer edge in order to counteract the radial tension, which is also strong in this area.
  • the reinforcing threads 57 are connected to one another at the respective crossing points 59, specifically by a synthetic resin.
  • the reinforcing threads are impregnated with a synthetic resin solution before laying to the pattern shown in FIG. 7.
  • the reinforcement layer 43 is therefore sufficiently inherently stable to be used for producing a slip ring 2, 2 '' 'or 44.
  • the slip ring between the ring flange and clamping ring is of course clamped so tight that the necessary torque transmission from the carrier to the slip ring can and does take place.
EP92114702A 1991-09-02 1992-08-28 Meule de rectification Expired - Lifetime EP0530691B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4129090A DE4129090A1 (de) 1991-09-02 1991-09-02 Schleifscheibe
DE4129090 1991-09-02

Publications (2)

Publication Number Publication Date
EP0530691A1 true EP0530691A1 (fr) 1993-03-10
EP0530691B1 EP0530691B1 (fr) 1996-10-23

Family

ID=6439649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114702A Expired - Lifetime EP0530691B1 (fr) 1991-09-02 1992-08-28 Meule de rectification

Country Status (6)

Country Link
US (1) US5516326A (fr)
EP (1) EP0530691B1 (fr)
AT (1) ATE144452T1 (fr)
DE (2) DE4129090A1 (fr)
ES (1) ES2093155T3 (fr)
ZA (1) ZA926624B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5895317A (en) * 1996-12-18 1999-04-20 Norton Company Wheel hub for longer wheel life
ES2142298T3 (es) * 1997-05-13 2001-02-01 August Heinr Schmidt Gmbh & Co Muela abrasiva para mecanizar hojas de sierra metalica circular.
US7056200B2 (en) * 2001-09-04 2006-06-06 3M Innovative Properties Company Quick change connector for grinding wheel
KR20040003642A (ko) * 2002-07-03 2004-01-13 주식회사 별표수세미 절삭휠
DE10308223A1 (de) * 2003-02-25 2004-09-23 Bruno Schmitz Schleifmittelwerk Gmbh Befestigungseinrichtung und zugeordnetes Werkzeug
US20080132158A1 (en) * 2006-12-04 2008-06-05 Joseph Patrello Grinding wheel and wheel hub therefore
US8408974B2 (en) * 2009-07-14 2013-04-02 Black & Decker Inc. Adapter for abrasive cutting wheels
EP2286959B1 (fr) * 2009-08-22 2014-05-07 August Rüggeberg GmbH & Co. KG Outil d'ébauchage et de ponçage
AT511244B1 (de) * 2011-03-30 2013-01-15 Swarovski Tyrolit Schleif Trennschleifscheibe
EP3015222B1 (fr) * 2015-07-09 2017-10-25 Lukas-Erzett Vereinigte Schleif- und Fräswerkzeugfabriken GmbH & Co. KG Disque de meulage
DE102022113308A1 (de) 2022-05-25 2023-11-30 Lightway GmbH Schleifscheibenaufnahme

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB417229A (en) * 1934-03-05 1934-10-01 Carl Krug Improvements in and relating to grinding or abrading tools
US2894583A (en) * 1958-09-15 1959-07-14 Onsrud Cutter Mfg Company Honeycomb cutter
US3753430A (en) * 1972-06-14 1973-08-21 E Oas Saw-grinder combination for thin rock section machines

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US726378A (en) * 1902-01-08 1903-04-28 Universal Machine Company Spindle-head and bearings therefor.
US1753377A (en) * 1928-01-28 1930-04-08 William J Skelly Grinding wheel and means for mounting the same
US1775004A (en) * 1928-04-03 1930-09-02 Landis Tool Co Multiple-grinding-wheel mounting
US2069788A (en) * 1935-08-07 1937-02-09 Norton Co Abrasive wheel
US2616229A (en) * 1950-04-10 1952-11-04 Allison Company Abrasive wheel
US2616230A (en) * 1950-07-11 1952-11-04 Allison Company Abrasive cutoff wheel
BE543437A (fr) * 1954-08-09
US3386211A (en) * 1965-03-25 1968-06-04 Setco Ind Inc Universal wheel mount for grinders
DE2156770C3 (de) * 1971-11-16 1974-06-20 Hermann 7031 Maichingen Hefner Vorrichtung zur lösbaren Befestigung einer Schleifscheibe oder dergleichen auf einer Treibspindel
CH569551A5 (fr) * 1973-09-17 1975-11-28 Reishauer Ag
DE2826374A1 (de) * 1978-06-16 1980-01-03 Johannes Koenning Betaetigungsvorrichtung fuer drehend arbeitende werkzeuge
US4236355A (en) * 1978-07-24 1980-12-02 Control Data Corporation Precision grinding wheel mount
US4251955A (en) * 1979-01-29 1981-02-24 The Warner & Swasey Company Hub assembly
US4393626A (en) * 1981-11-09 1983-07-19 Cincinnati Milacron Inc. Toolholder for supporting thin rotary tools
DE3322258C1 (de) * 1983-06-21 1984-06-28 Erwin 7611 Nordrach Junker Spannvorrichtung für einen Schleifring
DE3635973A1 (de) * 1986-10-22 1988-05-05 Guehring Automation Vorrichtung zum aufspannen von hochgeschwindigkeitsschleifscheiben
DE3823591A1 (de) * 1987-12-23 1989-07-06 Fortuna Werke Maschf Ag Schleifscheibe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB417229A (en) * 1934-03-05 1934-10-01 Carl Krug Improvements in and relating to grinding or abrading tools
US2894583A (en) * 1958-09-15 1959-07-14 Onsrud Cutter Mfg Company Honeycomb cutter
US3753430A (en) * 1972-06-14 1973-08-21 E Oas Saw-grinder combination for thin rock section machines

Also Published As

Publication number Publication date
EP0530691B1 (fr) 1996-10-23
US5516326A (en) 1996-05-14
DE4129090A1 (de) 1993-03-04
ATE144452T1 (de) 1996-11-15
ZA926624B (en) 1993-03-25
DE59207419D1 (de) 1996-11-28
ES2093155T3 (es) 1996-12-16

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