EP2353784A2 - Système de rectification composite - Google Patents

Système de rectification composite Download PDF

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Publication number
EP2353784A2
EP2353784A2 EP11450019A EP11450019A EP2353784A2 EP 2353784 A2 EP2353784 A2 EP 2353784A2 EP 11450019 A EP11450019 A EP 11450019A EP 11450019 A EP11450019 A EP 11450019A EP 2353784 A2 EP2353784 A2 EP 2353784A2
Authority
EP
European Patent Office
Prior art keywords
ring
base body
support
mounting
abrasive
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Withdrawn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
EP11450019A
Other languages
German (de)
English (en)
Other versions
EP2353784A3 (fr
Inventor
Josef Kofler
Edgar Dr. Rappold
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 Precision Grinding GmbH
Original Assignee
Rappold Winterthur Technologie GmbH
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 Rappold Winterthur Technologie GmbH filed Critical Rappold Winterthur Technologie GmbH
Publication of EP2353784A2 publication Critical patent/EP2353784A2/fr
Publication of EP2353784A3 publication Critical patent/EP2353784A3/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Withdrawn legal-status Critical Current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
    • B24D5/12—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
    • 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 composite separation grinding system with a grinding-active ring element and a concentrically arranged base body element, wherein the base body element in turn is fixable to a rotatable drive element.
  • the invention relates in particular to inorganic, organic or metallic bonded rotary cut-off wheels with a grinding wheel thickness T between 3 and 25 mm, preferably between 8 and 18 mm, and a grinding wheel outside diameter D between 150 and 3000 mm, preferably between 800 and 2000 mm, in composite construction are constructed and in principle consist of an independent, abrasive ring element and a main body element, wherein the base body member may be performed in a straight or cranked shape.
  • Cut-off wheels of this type are mainly used on stationary systems for metalworking (cutting, cutting to length, casting caps, steel, special alloys, titanium, hard metals, etc.) and are exposed to the highest mechanical and dynamic loads in these work processes. This fact requires cut-off wheels of the highest quality and load capacity to achieve the greatest possible occupational safety during work.
  • the main problems of this blade system are its high production costs and above all its relatively low dynamic stability.
  • As a special problem zone that area of the abrasive ring has been found, in which the driver elements are incorporated. By these elements, the ring body is weakened partially massive, so that tears at the smallest deflections of the ring body or lateral load of the separation system of this system part (cracking) and thereby destroyed (breakage).
  • This problem becomes more delicate the thinner the abrasive ring is made and the higher the working parameters are set when cutting (working speed / infeed). A sustainable use of a cutting disc according to AT 502 285 could not be reached so far.
  • this is achieved by providing a mounting ring for forming a releasable connection between the abrasive ring element and the main body element, wherein this releasable connection is non-positively and preferably positively.
  • the inventively designed mounting ring contributes significantly to the improved connection between abrasive ring element and body element. All previous approaches to a functioning, safe and economically feasible cutting wheel, based on a base body element and a replaceable abrasive sliding ring element have failed because the abrasive ring element could not be easily and above all not securely connected to a support element (clamping plate, support plate).
  • the problem zone is the area of force transmission between the slip ring part and the base body element. In these zones occur both stress-related defects as well as dimensional errors due to the fact that the abrasive ring element has an uneven lining thickness and thus loses massive mechanical strength by the previously usual pressed or subsequently incorporated driver elements.
  • the particular advantage of the composite abrasive wheel system according to the invention lies in the reliability of the mounting ring and in the simplicity of the steps when changing a sand-active ring element. Furthermore, the mounting ring allows the recording of loads occurring during operation of the composite separation grinding system according to the invention.
  • the abrasive ring element may comprise a ring-shaped abrasive grinding material and a carrier ring, which in the annular abrasive part is partially embedded, wherein the protruding from the annular Schreifteil- area of the support ring is fixed by the mounting ring on the base body element.
  • the carrier ring can be pressed in accordance with a further embodiment of the invention in the annular grinding part.
  • the carrier ring fixedly connected to the annular grinding part is provided in order to produce the most reliable and easily releasable connection with the basic body element.
  • the carrier ring preferably has a substantially circular inner circumference and the main body element has a substantially circular outer circumference, which forms a Radialzentrier Chemistry for the carrier ring.
  • the Radialzentrier tone serves the radial centering of the abrasive ring element.
  • the carrier ring may be in the context of the invention in one piece or composed of several segments. Furthermore, in order to improve the bonding effect with the annular grinding part, the carrier ring may have perforations, open-edged cuts or structuring in its outer peripheral region, e.g. have curved contours.
  • the carrier ring and the body member can be brought into mutual engagement by driver elements which are adapted to absorb the occurring during a separation or grinding radial and centrifugal forces.
  • the driver elements may preferably be positively engageable engageable, according to a further embodiment of the invention, the carrier ring along its inner circumference spaced, dovetailed undercut recesses and the body member has on its outer circumference gegentechnische projections which can be brought into engagement with the undercut recesses.
  • the base body member comprises a subsequent in the axial direction of the Radialzentrier Chemistry, preferably annular support portion having a larger diameter than that of the Radialzentrier statements wherein the inside of the support area projecting beyond the outer circumference of the radial centering surface serves as a contact surface for the support ring protruding from the annular sanding part.
  • the mounting ring tightens the carrier ring relative to the support area.
  • the support region can be formed in one piece with the main body element or by a separate, annular main body support element, which is connected to the main body element, e.g. in that the base body element and the annular base body support element are glued, welded, riveted or screwed together.
  • the base body member having an axially subsequent, preferably annular mounting portion having a smaller diameter than that of the centering surface and that of the inner periphery of the mounting ring.
  • the assembly area provided in this way allows, on the one hand, an aligned arrangement of the mounting ring on the composite parting system according to the invention and, at the same time, a support of the mounting ring during loads occurring during operation.
  • the mounting portion may be formed integrally with the base member or by a separate, annular base member which is connected to the base member, e.g. in that the basic body element and the annular basic body mounting element are glued, welded, riveted or screwed together.
  • a suitable dimensioning of the mounting ring may be that the Mounting ring has an outer diameter corresponding to the outer diameter of the support region and the base body support member and an outer diameter of the mounting region or the outer diameter of the GrundWorkmontageelements corresponding inner diameter, so that the mounting ring placed on the formed by the mounting portion and the base body mounting element approach and exempted from the through the mounting area Side region of the base body element and against the protruding from the annular grinding member support ring is tensioned.
  • connection types are contemplated, one of which is e.g. a heavy-duty screw is.
  • the through holes can also extend through the support area in the basic body element or corresponding through holes can run in the base body support element, so that the fixing screws can be screwed into the support area, whereby a secure hold can be achieved.
  • the fixing screws can be designed as countersunk screws for which corresponding counterbores are to be provided in the mounting ring.
  • FIG. 1 Another variant of the mounting ring fixation can be formed in that a bayonet closure is provided, with which the mounting ring is pivotable from an insertion position into a fixing position, whereby the mounting ring is fixed relative to the base body member and thereby protruding from the abrasive ring member ring support ring between the support area and clamped in the mounting ring.
  • a bayonet closure is provided, with which the mounting ring is pivotable from an insertion position into a fixing position, whereby the mounting ring is fixed relative to the base body member and thereby protruding from the abrasive ring member ring support ring between the support area and clamped in the mounting ring.
  • the bayonet lock may comprise a plurality of bayonet pins and corresponding bayonet slots, wherein the bayonet pins are each secured with one end in the mounting ring and at its other end a pin head having a larger diameter than the pin diameter, and the corresponding bayonet slots in the base body element and in the support area or are arranged in the base body support member.
  • the bayonet slots each have at one end a through hole, which has a larger diameter than the pin head, so that the bayonet pins with their pin head inserted into the through holes and thereby the mounting ring with the base body member and the support ring in Appendix and in the insertion position can be brought, whereupon the mounting ring is pivotable in the slot direction of the bayonet slots in the fixing position.
  • the pin heads of the bayonet pins and the main body element have cooperating Zentrierschrägen, whereby a guide during rotation of the mounting ring can be achieved.
  • an anti-rotation device is provided according to a development of the invention, which upon reaching the fixing position of the Bayonet lock arrives in a latching position, in which further pivoting of the mounting ring is prevented.
  • Fig.1 shows a composite separation grinding system with a replaceable, rotationally symmetric abrasive ring element 27th
  • the abrasive-active ring element 27 contains a grinding-active material, for which, for example, resin-bonded multicomponent mixtures are used in which pure or modified phenolic resins are preferably used as the organic binder.
  • a grinding-active material for which, for example, resin-bonded multicomponent mixtures are used in which pure or modified phenolic resins are preferably used as the organic binder.
  • other resins such as epoxy resins, Urea resins (melamine resins), Cumaronharze, lscyansate, polyamides of polylmides, etc. are used as a binder for use.
  • abrasive masses receive a wide variety of abrasive grain types, which differ in size, composition and physical properties.
  • CBN cubic boron nitride
  • PCD polycrystalline diamonds
  • abrasive masses additionally contain reinforcing elements.
  • whiskers are used to improve the mechanical properties of the abrasive masses.
  • abrasive masses contain fillers, with the help of which it is possible to vary the structure and structure of the grinding mass or to achieve a modified cutting or cooling behavior. Even the control of the energy absorption in the separation process can be influenced by fillers.
  • the grinding-active ring element 27 is held by a body element 3 arranged concentrically therewith, which in turn is fixed via a machine flange 4 to a rotatable drive element 91, for example to a machine shaft, which rotates about the rotation axis 90 during operation.
  • the machine flange 4 serves to transmit the drive energy from the rotatable drive element 91 to the abrasive-active ring element 27.
  • a mounting ring 5 arranged concentrically with respect to the rotation axis 90 is provided for forming a detachable connection between the abrasive ring element 27 and the base body element 3.
  • the main body element 3 can be embodied in one or more parts, wherein only a single material or optionally also a plurality of different materials can be used. Suitable materials include metals, non-ferrous metals, composite materials of all kinds, organic high-performance materials or plastics. The preferred material for all embodiments of the base member, whether one or more parts, but is steel. The embodiment of the base body element 3 may be different depending on the application. As preferred embodiments, however, the basic body elements are designed in straight or cranked form ( Figure 8 ).
  • the abrasive active ring member 27 is composed of an annular abrasive member 1, which is formed from the above-described abrasive mass, and a support ring 2 which is partially embedded in the annular abrasive member 1, for example by the carrier ring 2 is pressed in the annular abrasive member 1
  • the carrier ring 2 can also be composed of several segments.
  • the protruding from the annular grinding part 1 region of the support ring 2 can be fixed by the mounting ring 5 on the base body element 3.
  • the carrier ring 2 has a substantially circular inner circumference and the main body element 3 has a substantially circular outer circumference, which forms a Radialzentrier constitutional 15 for the support ring 2 ( Fig.2 ).
  • driver elements 24, 25 For transmitting the driving force from the machine shaft to the annular grinding part 1 and for receiving the centrifugal forces generated during operation, the carrier ring 2 and the base body element 3 are brought into mutual engagement by driving elements 24, 25.
  • the preferred number of driver elements 24, 25 is between two and twenty, preferably between eight and twelve, and may be embodied in any desired form.
  • the driver elements 24, 25 are in Figure 7 shown in detail.
  • the support ring 2 has recesses 25 spaced from each other along its inner circumference and dovetail-shaped undercut recesses 25, and the base body element 3 has protrusions 24 which are diametrically opposed on its outer circumference and which are brought into engagement with the undercut recesses 25.
  • the achieved by the driver elements 24, 25 positive and non-positive connection is achieved by the abrasive ring 27 is removed by lateral displacement of the body member 3.
  • the base body element 3 has an adjoining in the axial direction of the Radialzentrier Chemistry 15 support portion 40 which has a larger diameter than those of the Radialzentrier requirements 15, wherein over the outer circumference of the Radialzentrier requirements 15 protruding inside of the support area as a contact surface for the from the annular Abrasive 1 outstanding support ring 2 is used.
  • the support region is formed by a separate, annular basic body support element 6, which is connected to the main body element 3 by gluing, welding, riveting or screwing it to the base body support element 6.
  • the base body element 3 and the base body support element 6 it is also possible for the base body element 3 and the base body support element 6 to be in one piece.
  • a mounting portion 41 adjoining in the axial direction is further formed, which has a smaller diameter than that of the Radialzentrier matters 15 and that of the inner periphery of the mounting ring 5.
  • the mounting portion 41 is formed by a separate, annular body mounting member 8 which is connected to the body member 3 by the two parts, e.g. glued, welded, riveted or bolted together.
  • an integral embodiment of the base body member 3 and the base body mounting member 8 are present.
  • the mounting ring 5 is designed so that it covers both a portion of the base body member 3 and a portion of the support ring 2 on one side and is releasably secured to the base body member 3, whereby the protruding from the annular grinding member 27 portion of the support ring 2 between the Mounting ring 5 and the base body support member 6 is clamped that occurring lateral forces can be derived.
  • the mounting ring 5 has an outer diameter corresponding to the outer diameter of the support region 40 or the base body support element 6 and an inner diameter corresponding to the outer diameter of the mounting region 41 or the outer diameter of the main body mounting element 8, so that the mounting ring 5 on the approach formed by the mounting area or the base body mounting element 8 can be placed and against the side area of the base body element 3, which is freed by the mounting area 41, and against the part projecting out of the annular grinding part 1 Carrier ring 2 can be stretched.
  • Figure 3 shows a variant of the fixation of the mounting ring 5 on the base body element 3, in which the mounting ring 5 is effected by a screw connection.
  • the base body element 3 in the outer edge region parallel to the central axis extending through holes 7 with an internal thread 11, into which through corresponding through holes 70 in the mounting ring 5 guided fixing screws 10 are screwed to set the mounting ring 5 against the base body member 3, wherein the through holes in the base body element 3 also extend through the support region 40 or in the base body support element 6, so that the fixing screws 10 can be screwed into the support region 40.
  • the fixing screws 10 are formed as countersunk or flat head screws for the corresponding mounting holes 5 are provided in the mounting ring 5, and made of materials with high strength and toughness, preferably made of steel or steel alloys, the number of fixing screws 10 between two and twenty four, preferably between eight and twelve.
  • the fixing screws 10 are released and the mounting ring 5 can be removed.
  • the now freely accessible abrasive ring 27 is removed from the Radialzentrier Design 15 of the main body member 3 and can be replaced by a new abrasive ring 27.
  • the mounting ring 5 is screwed with the fixing screws relative to the base body member 3, whereby the composite separation grinding system according to the invention is ready for operation again.
  • FIG. 4 and 5 show another embodiment of the composite separation grinding system according to the invention, in which the mounting ring 5 is fixed by means of a bayonet fitting 12 with which the mounting ring 5 is pivotable from an insertion position to a fixing position, whereby this is fixed relative to the base body member 3 and thereby from the abrasive Ring element 1 projecting support ring 2 is clamped between the support portion 40 and the mounting ring 5.
  • the fixation is completed.
  • This fixing variant allows extremely fast change of abrasive ring elements 27 and also ensures that the annular grinding part 1 comes to lie centrally above the base body element 3.
  • FIG. 4 shows in detail the system of the bayonet closure 12, which is formed of a plurality of bayonet pins 13 and corresponding bayonet slots 29 in the base body member 3 and the support portion 40.
  • the bayonet pins 13 are each secured with one end in the mounting ring 5 and have at its other end a pin head 45 which has a larger diameter than the pin diameter.
  • the number of bayonet pins 13 is two to twenty, preferably eight to twelve, wherein the fixing of the bayonet pins 13 in the mounting ring 5 by gluing, welding, screws od. Like. Can take place, but vorzgumirtig done by welding.
  • the bayonet slots 30 are formed at one end each with a through hole 60 having a larger diameter than the pin head 45, so that the bayonet pins 13 with their pin heads 45 inserted into the through holes 60 and thereby the mounting ring 5 with the base body member 7 and the support ring fifth in installation and in the insertion position can be brought, whereupon the mounting ring 5 is pivotable in the slot direction of the bayonet slots 30 in the fixing position ( Figure 5 ), whereby it comes into positive connection with the base body element 3.
  • Figure 6 shows in connection with the bayonet 12 an anti-rotation 19 to secure the mounting ring 5 against accidental rotation, which reaches 12 upon reaching the fixing position of the bayonet lock 12 in a locking position in which further pivoting of the mounting ring 5 is prevented.
  • the anti-rotation 19 consists of a relative to the base body member 3 slidably mounted safety slide 20 and a latching notch 23 in the mounting ring 5, wherein the safety slide 20 is pressed upon reaching the fixing position of the bayonet 12 via slide springs 22 in the latching notch 23. If the mounting ring 5 is in the fixing position, the slide springs 22 press the safety slide 20 into the latching notch 23 and thereby prevent any further rotational movement of the mounting ring 5.
  • the safety slide 20 is moved against the spring force of the slide springs 22 out of engagement with the latching notch 23.
  • this unlocked position of the safety slide 20 can be fixed, for example by introducing a pin into a bore 21.
  • By rotating the mounting ring 5 from the fixing position to the insertion position of the bayonet lock 12 is released and the mounting ring 5 can be removed.
  • the change can then be as in connection with the embodiment according to Fig. 2 perform in a simple manner.
EP11450019.2A 2010-02-10 2011-02-03 Système de rectification composite Withdrawn EP2353784A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA188/2010A AT509372B1 (de) 2010-02-10 2010-02-10 Verbundschleifsystem

Publications (2)

Publication Number Publication Date
EP2353784A2 true EP2353784A2 (fr) 2011-08-10
EP2353784A3 EP2353784A3 (fr) 2015-09-23

Family

ID=44121589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11450019.2A Withdrawn EP2353784A3 (fr) 2010-02-10 2011-02-03 Système de rectification composite

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EP (1) EP2353784A3 (fr)
AT (1) AT509372B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3281743A1 (fr) * 2016-08-11 2018-02-14 Eduard Rieger Disque de separation ou bride de transmission, en particulier pour un appareil de travail manuel
CN110328573A (zh) * 2019-08-09 2019-10-15 蚌埠市昆宇机械加工厂 一种玻璃边部磨边装置
CN110385633A (zh) * 2019-08-12 2019-10-29 蚌埠市昆宇机械加工厂 一种玻璃表面抛光装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338130B (de) 1973-08-13 1977-08-10 Braun S Sohne J Trennschleifscheibe
EP0769352A1 (fr) 1995-10-18 1997-04-23 Rappold International Sales AG Disque abrasif feuilleté
EP1332834A1 (fr) 2002-01-24 2003-08-06 Tyrolit Schleifmittelwerke Swarovski KG Meule de tronçonnage avec tôles latérales d'acier
AT502285A1 (de) 2004-10-19 2007-02-15 Gissing Gerhard Trennschleifring

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707732A (en) * 1949-09-29 1954-04-21 Ernest Douglas Teague Improvements relating to grinding wheels
US3793783A (en) * 1972-10-02 1974-02-26 Norton Co Segmental cut-off grinding wheel
AT318424B (de) * 1973-04-02 1974-10-25 Swarovski Tyrolit Schleif Segmentschleifscheibe
US4251955A (en) * 1979-01-29 1981-02-24 The Warner & Swasey Company Hub assembly
ES2157149B1 (es) * 1998-11-20 2002-08-01 Pegueroles Agustin Audi Disco abrasivo perfeccionado.
DE10030586A1 (de) * 2000-06-21 2002-01-10 Bruno Schmitz Schleifmittelwer Werkzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338130B (de) 1973-08-13 1977-08-10 Braun S Sohne J Trennschleifscheibe
EP0769352A1 (fr) 1995-10-18 1997-04-23 Rappold International Sales AG Disque abrasif feuilleté
EP1332834A1 (fr) 2002-01-24 2003-08-06 Tyrolit Schleifmittelwerke Swarovski KG Meule de tronçonnage avec tôles latérales d'acier
AT502285A1 (de) 2004-10-19 2007-02-15 Gissing Gerhard Trennschleifring

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3281743A1 (fr) * 2016-08-11 2018-02-14 Eduard Rieger Disque de separation ou bride de transmission, en particulier pour un appareil de travail manuel
CN110328573A (zh) * 2019-08-09 2019-10-15 蚌埠市昆宇机械加工厂 一种玻璃边部磨边装置
CN110385633A (zh) * 2019-08-12 2019-10-29 蚌埠市昆宇机械加工厂 一种玻璃表面抛光装置

Also Published As

Publication number Publication date
EP2353784A3 (fr) 2015-09-23
AT509372A1 (de) 2011-08-15
AT509372B1 (de) 2013-01-15

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