EP0865878B1 - Meule type boisseau - Google Patents

Meule type boisseau Download PDF

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Publication number
EP0865878B1
EP0865878B1 EP98810100A EP98810100A EP0865878B1 EP 0865878 B1 EP0865878 B1 EP 0865878B1 EP 98810100 A EP98810100 A EP 98810100A EP 98810100 A EP98810100 A EP 98810100A EP 0865878 B1 EP0865878 B1 EP 0865878B1
Authority
EP
European Patent Office
Prior art keywords
grinding
area
throughbores
disc
axis
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.)
Expired - Lifetime
Application number
EP98810100A
Other languages
German (de)
English (en)
Other versions
EP0865878A3 (fr
EP0865878A2 (fr
Inventor
Rolf Spangenberg
Josef Nussbaumer
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0865878A2 publication Critical patent/EP0865878A2/fr
Publication of EP0865878A3 publication Critical patent/EP0865878A3/fr
Application granted granted Critical
Publication of EP0865878B1 publication Critical patent/EP0865878B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • 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
    • B24D7/18—Wheels of special form

Definitions

  • the invention relates to a cup-shaped grinding wheel according to the preamble of claim 1.
  • a pot-shaped grinding wheel such as that used for example is known from EP 0 535 431, used in a hand-held Angle grinder is used, which usually consists of an extraction system of suction hood and suction device, is connected.
  • a hand-held Angle grinder used in a hand-held Angle grinder is used, which usually consists of an extraction system of suction hood and suction device, is connected.
  • the grinding wheel becomes like this brought up to the surface of the surface that at least part of the abrasive body with their sides facing away from the receiving area material from the Remove the surface.
  • This removed material, but also the accumulating material Grinding dust is removed through the through holes with the help of the extraction system sucked through from the processing area.
  • Each of the through holes is arranged so that it partially covers the grinding area and partially penetrates the transition area. Due to the conical shape of the transition area The through holes therefore do not only open into those of the receiving area side of the grinding area facing away but also in a free space, which extends between the receiving area and the grinding area and from which Transition area is surrounded. Therefore, when switching on the suction system each time the air is sucked out of this free space until there is a corresponding one Negative pressure between the grinding area and the surface to be processed can build up. This is particularly uncomfortable for the operator because any negative pressure that may be generated is always delayed for commissioning of the grinding device and thereby the removed one at the beginning of the grinding process Material or the resulting grinding dust cannot be extracted.
  • WO-A-95/29788 is a cup-shaped grinding wheel with an annular Grinding area and one coaxial to the grinding area, axially from the grinding area spaced recording area known.
  • the grinding area has several on its circumference Recesses, with one of these recesses receiving a Serves cutting body, the outer contour of the grinding area at least in the radial direction surmounted.
  • a conical transition area in which several Through holes are arranged.
  • the central area of the recording area is also provided with a through hole.
  • the object of the invention is a simple and economically producible grinding wheel. to create with the removed material as well as grinding dust quickly and safely is extractable from the processing area. With the grinding wheel, a good grinding performance should a good surface quality of the machined surface and a good one Cooling of the grinding wheels can be achieved. The grinding wheel should not generate vibration and the accumulation of worn material and grinding dust between the Abrasives should be prevented. Furthermore, the grinding wheel should be designed in this way be that there is a negative pressure between the grinding area and the surface of a Can be built up very quickly.
  • a longer service life of the grinding wheels is achieved by cooling them. Since the Has grinding wheel segment-like grinding body, it can not seal on the lie on the surface to be machined. Due to the between the grinding wheels lying, from the outer contour of the grinding area over the entire radial Extending the interstices extending the grinding area can air from outside flow here, the temperature of which is lower than the temperature of the grinding wheels, when this material is removed from the surface. This cool air flows around the Grinding wheel and cools it. The thermal load on the grinding wheels and the Adhesive with which the grinding wheel is fixed in the grinding area on the grinding wheel are reduced.
  • the through holes are preferably in the Grinding area larger than the through holes in the transition area.
  • the vacuum generated by the suction system mostly in the grinding area acts, suitably corresponds to the diameter of the through hole in Grinding area 1.5 to 3.6 times the diameter of the through hole in the transition area.
  • the diameter advantageously corresponds to the strength of the support body the through hole in the grinding area is 0.06 to 0.18 times the outside diameter of the grinding area.
  • At least one grinding wheel is expediently located in the grinding area partly between two adjacent through holes. This results in a larger grinding area on the one hand, and Center of the grinding wheel open to the through holes in the grinding area created at least partially surrounding chambers in which for better Suction collects the removed material.
  • the removed material is mainly through the Through holes drilled in the grinding area. Since the grinding wheel is rotating, the non-extracted, remaining material removed better through the transition area penetrating through holes can be suctioned when the through holes in the transition area compared to the through holes in the grinding area be adjusted in the direction of rotation of the grinding wheel. This is achieved by the through holes in the transition area in the circumferential direction compared to the Through holes in the grinding area are arranged offset.
  • the axis of the through holes in the grinding area each on one of the Disc axis of the grinding wheel outgoing first beam and the axis of the Through holes in the transition area each on one of the disc axis the grinding wheel emanating from the second beam, which is the first beam under a Angle runs from 5 ° to 25 °.
  • the transition area to the disc axis tapers at an angle of 30 ° to 50 °.
  • the cup-shaped grinding wheel shown in FIGS. 1 and 2 has an annular, segment-like grinding wheel 5 having grinding area 2, one for Grinding area 2 coaxially arranged, axially spaced annular Receiving area 4 and one of the inner contour of the grinding area 2 outgoing; extending conically to the outer contour of the receiving area 4 Transitional area 3.
  • the annular receiving area 4 serves to fix the grinding wheel a drive shaft of an angle grinder, not shown, an inner Diameter of the receiving area 4 essentially to the diameter of the Drive shaft is matched.
  • the transition area 3 tapers essentially conically to the disk axis of FIG Grinding wheel at an angle W2 of 40 ° and is, for example, seven Through holes 7 running parallel to the wheel axis of the grinding wheel enforced in the circumferential direction along the transition region 3 essentially are arranged at equal distances from each other.
  • the annular grinding area 2 has in particular seven in the circumferential direction through holes 6 arranged essentially at equal intervals from one another that pass through grinding area 2 parallel to the wheel axis of the grinding wheel.
  • the through holes 6 in the grinding area 2 are larger than the through holes 7 in the transition area 3.
  • the diameter D1 of the through holes 6 in grinding area 2 corresponds to both 2.10 times the diameter D2 Through holes 7 in the transition area 3 and 0.13 times Outside diameter D3 of the grinding area 2.
  • the radial extent R of the grinding area 2 corresponds to 0.222 times the outside diameter D3 of grinding area 2.
  • the through holes 6 in the grinding area 2 are opposite to the through holes 7 offset in the circumferential direction to each other in the transition region 3 arranged.
  • Each axis of the through holes 6 in the grinding area 2 lies on one first beam S1 emanating from the wheel axis of the grinding wheel, and each of the Axes of the through holes 7 in the transition area 3 lies on one of the Disc axis of the grinding wheel outgoing second beam S2, the first Beam S1 runs at an angle W1 of 20 °.
  • the grinding wheels 5 are on the side surface 22 facing away from the receiving area 4 of the grinding area 2, extend at least partially along the Outer contour 21 of the peripheral area of the grinding area 2 and protrude beyond it at least partially in the radial direction. Each grinding wheel 5 also extends each between two adjacent through holes 6 of the grinding area 2 at least partially over the entire radial extent R of the grinding area 2.
  • the grinding bodies 5 are essentially L-shaped. Here is the selected geometry of the grinding wheel 5 arranged so that the parallel to the axis the through hole 6 extending inner contour of the grinding body 5 starting at Beam S1 merges into a radius R1 running towards the center and thereby the Through hole 6 at least partially encloses, with the effect that the removed Material and the grinding dust can be extracted optimally. Due to the Geometry and the arrangement of the grinding wheels 5 are vibrations of the cup-shaped Prevents grinding wheel, as well as an improved self-sharpening process of the grinding wheel reached.
  • the outside of the recording area 4 is 6: 1, for example.
  • the strength of S3 Grinding wheel in grinding area 2 is smaller than thickness S4 in receiving area 4.
  • the receiving area 4 can have a thickness S4 of 3 to 6 mm and the grinding area 2 have a thickness S3 of 1 to 2.8 mm.
  • the grinding wheel 5 are on one of the Side area 22 of the grinding area 2 facing away from the receiving area 4 by means of a Adhesive attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (6)

  1. Meule boisseau comprenant une zone réceptrice circulaire (4) ainsi qu'une zone de meulage en forme de couronne (2) qui est disposée coaxialement à la zone réceptrice (4) et à distance axiale de celle-ci et qui, tout comme la zone réceptrice (4), s'étend dans un plan respectif perpendiculaire à l'axe longitudinal médian de la meule et comporte des corps de meulage segmentés (5), lesquels sont disposés sur une surface latérale (22) située à l'opposé de la zone réceptrice (4), dépassent au moins partiellement le long du contour extérieur (21) de la zone de meulage (2) et dépassent partiellement de la zone de meulage (2) dans la direction radiale, comprenant une zone de transition (3) qui part du contour intérieur de la zone de meulage (2) et se rétrécit sous forme conique vers le contour extérieur de la zone réceptrice (4), et au moins deux trous débouchants (6, 7) s'étendant parallèlement à l'axe longitudinal médian de la meule, au moins un trou débouchant (6) traversant la zone de meulage (2) pour l'aspiration du matériau enlevé ainsi que pour le refroidissement des corps de meulage (5) et au moins un trou débouchant (5) traversant la zone de transition (3) pour l'aspiration de la poussière de meulage, caractérisée en ce que les axes des trous débouchants (6) de la zone de meulage (2) se trouvent chacun sur une demi-droite (S1) partant de l'axe de disque du disque de meule, et la géométrie des corps de meulage (5) étant prévue de façon que le contour intérieur des corps de meulage (5) s'étendant parallèlement à l'axe du trou débouchant (6) rejoigne, à partir de la demi-droite (S1), un rayon (R1) s'étendant vers le centre du trou débouchant (6) et entoure ainsi au moins en partie le trou débouchant (6).
  2. Meule boisseau selon la revendication 1, caractérisée en ce que les trous débouchants (6) de la zone de meulage (2) sont plus grands que les trous débouchants (7) de la zone de transition (3).
  3. Meule boisseau selon la revendication 2, caractérisée en ce que le diamètre (D1) des trous débouchants (6) dans la zone de meulage (2) correspond à 1,5 à 3,6 fois le diamètre (D2) des trous débouchants (7) dans la zone de transition (3).
  4. Meule boisseau selon une des revendications 1 à 3, caractérisée en ce que le diamètre (D1) des trous débouchants (6) dans la zone de meulage (2) correspond à 0,06 à 0,18 fois le diamètre extérieur (D3) de la zone de meulage (2).
  5. Meule boisseau selon une des revendications 1 à 4, caractérisée en ce que, dans la zone de meulage (2), un corps de meulage (5) se trouve au moins en partie entre deux trous débouchants voisins l'un de l'autre (6).
  6. Meule boisseau selon une des revendications 1 à 5, caractérisée en ce que les axes des trous débouchants (6) dans la zone de meulage (2) se trouvent chacun sur une première demi-droite (S1) partant de l'axe de la meule, et les axes des trous débouchants (7) dans la zone de transition (3) se trouvent chacun sur une seconde demi-droite (S2) qui part de l'axe de la meule et qui s'étend selon un angle (W1) de 5° à 25° par rapport à la première demi-droite (S1).
EP98810100A 1997-02-25 1998-02-10 Meule type boisseau Expired - Lifetime EP0865878B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19707445 1997-02-25
DE19707445A DE19707445A1 (de) 1997-02-25 1997-02-25 Topfförmige Schleifscheibe

Publications (3)

Publication Number Publication Date
EP0865878A2 EP0865878A2 (fr) 1998-09-23
EP0865878A3 EP0865878A3 (fr) 2000-07-19
EP0865878B1 true EP0865878B1 (fr) 2003-05-28

Family

ID=7821376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810100A Expired - Lifetime EP0865878B1 (fr) 1997-02-25 1998-02-10 Meule type boisseau

Country Status (7)

Country Link
US (1) US5911620A (fr)
EP (1) EP0865878B1 (fr)
JP (1) JP4299893B2 (fr)
KR (1) KR100508224B1 (fr)
AT (1) ATE241444T1 (fr)
CA (1) CA2230338C (fr)
DE (2) DE19707445A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104162847A (zh) * 2014-07-31 2014-11-26 江苏美杰磨具科技有限公司 一种用于路面磨削的金刚石磨盘

Also Published As

Publication number Publication date
EP0865878A3 (fr) 2000-07-19
EP0865878A2 (fr) 1998-09-23
KR19980070945A (ko) 1998-10-26
JP4299893B2 (ja) 2009-07-22
KR100508224B1 (ko) 2005-10-21
DE19707445A1 (de) 1998-08-27
DE59808503D1 (de) 2003-07-03
US5911620A (en) 1999-06-15
ATE241444T1 (de) 2003-06-15
CA2230338C (fr) 2002-04-16
JPH10264042A (ja) 1998-10-06
CA2230338A1 (fr) 1998-08-25

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