EP3325216A1 - Meule munie d'un disque de support non-tissé - Google Patents

Meule munie d'un disque de support non-tissé

Info

Publication number
EP3325216A1
EP3325216A1 EP16747464.2A EP16747464A EP3325216A1 EP 3325216 A1 EP3325216 A1 EP 3325216A1 EP 16747464 A EP16747464 A EP 16747464A EP 3325216 A1 EP3325216 A1 EP 3325216A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
abrasive
support plate
section
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.)
Withdrawn
Application number
EP16747464.2A
Other languages
German (de)
English (en)
Inventor
Gerd Fischer
Jan Schuster
Zoltan Attila Daday
Bernhard Runden
Jürgen Martel
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.)
Lukas Erzett & Co KG GmbH
Original Assignee
Lukas Erzett Ver Schleif und Fraeswerkzeugfabriken & Co KG GmbH
Lukas-Erzett Vereinigte Schleif- und Fraswerkzeugfabriken & Co KG 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 Lukas Erzett Ver Schleif und Fraeswerkzeugfabriken & Co KG GmbH, Lukas-Erzett Vereinigte Schleif- und Fraswerkzeugfabriken & Co KG GmbH filed Critical Lukas Erzett Ver Schleif und Fraeswerkzeugfabriken & Co KG GmbH
Publication of EP3325216A1 publication Critical patent/EP3325216A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B24D7/02—Wheels in one piece
    • B24D7/04—Wheels in one piece with reinforcing means
    • 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
    • B24D7/06—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 with inserted abrasive blocks, e.g. segmental
    • B24D7/08—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 with inserted abrasive blocks, e.g. segmental with reinforcing means
    • 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
    • B24D7/16—Bushings; Mountings

Definitions

  • the present invention relates to a grinding wheel with a support plate made of a binder-bonded nonwoven material having a mounting portion with an annular clamping surface for receiving a clamping nut and a starting radially from the mounting portion further outward support portion.
  • the support section is single-layer or multi-layered and self-supporting made of bonded nonwoven material.
  • the grinding wheel on an abrasive means which is connected to the support portion of the support plate, wherein an end face of the abrasive defines an axially spaced from the clamping surface radial plane.
  • Such a grinding wheel is shown in DE 90 17 196 U.
  • the grinding wheel disclosed therein has a multilayer carrier made of layers of wood, paper, cotton and other vegetable fibers in the form of woven or spun pile, layered in the direction of the slice thickness. On the carrier several abrasive slats are applied fan-like.
  • DE 1 948 272 U discloses a pad with abrasive attached thereto.
  • the pad is provided with a fiber reinforcement in the form of glass fiber mats whose individual thread elements are stretched straight as fiber sections and oriented in their direction on all sides.
  • the abrasive used is an abrasive grain layer which is pressed directly onto the substrate with the aid of synthetic resin.
  • WO 2012/000647 A1 shows a dimensionally stable and rotationally symmetrical natural fiber-reinforced tool carrier for receiving at least one grinding or polishing element.
  • the tool carrier has at least one tool support surface for Receiving the at least one grinding or polishing element.
  • the tool carrier is produced by means of an injection molding technique using granules.
  • the planar tool support surface is annular. It encloses a region offset from the plane of the tool support surface by one step, the height of the step being 3.5 mm in one exemplary embodiment.
  • EP 1 541 288 A1 shows a coated grinding wheel comprising a carrier and a coated abrasive article connected thereto.
  • the abrasive body comprises an underlayer and a layer of abrasive material applied thereon.
  • the carrier may be made of non-woven fibers.
  • a grinding wheel of similar construction is shown in US 5 560 753 A.
  • DIN ISO 603-14: 1999 discloses as form a cranked grinding wheel made of a bonded abrasive.
  • loose abrasive grain is mixed with a binder material, such as e.g. a resin, mixed into a mass which is then pressed to a grinding tool.
  • Cranked grinding wheels can therefore be made more easily in various shapes, since, unlike grinding wheels with a carrier, no carrier has to be deep-drawn, which would lead to limitations.
  • Grinding wheels with abrasives mounted on a supporting base also in the form of a disc, have been known and used for a long time.
  • the backing of such abrasive wheels may be made of, for example, paper or a pulp-based composite material such as vulcanized fiber. Also known are cotton, polyester, blended fabric or other high tensile strength, low elongation fabric backings. Combinations of various materials, such as a fabric and paper, are also used to make abrasive pads.
  • the relatively robust grinding wheels with a base made of vulcanized fiber, in short fiber discs have the disadvantage that the vulcanized fiber can break on contact with sharp edges, under harsh conditions of use or elevated temperatures.
  • the fiber discs may warp in case of incorrect storage, especially if the humidity is too high.
  • wears when using such Grinding wheels increasingly the grain layer of the abrasive.
  • the fiber disc embrittles during grinding by the heating and can tear in the worst case, or burst.
  • the use of fiber discs usually also requires the purchase of a special support plate with a clamping nut adapted to the fiber disc. This closes due to its flat design with the fiber disc and is thus not or only slightly above the fiber disc axially protruding.
  • Such a clamped grinding wheel can then be used with a low angle of attack, as required for example in surface grinding.
  • This grinding wheel has a multilayer structure and has an abrasive grain and resin coated abrasive cloth, which is glued to several layers of fabric. So that a protruding clamping nut and a protruding tool spindle do not touch the tool to be machined, the fabric support plate has strongly angled, radially outer grinding surfaces.
  • grinding wheels for example fabric grinding wheels or nonwoven grinding wheels, are known, which are pasted behind with a velcro velor.
  • a correspondingly adapted support plate has a Velcro strip on which the grinding wheels are releasably secured.
  • these grinding wheels are only designed for low loads and speeds. In this respect, such grinding wheels are not suitable for electrostatically scattered fiber discs with abrasive layer and ceramic grain.
  • a grinding wheel of the type mentioned above in that the abrasive has an annular Schleifronde with an abrasive carrier and abrasive grains applied thereto and that an axial distance t between the clamping surface and the radial plane is at least 6 mm.
  • a nonwoven material also called nonwoven or nonwoven, understood a structure of fibers of limited length, continuous filaments or cut yarns of any kind and any origin, said fibers in any way to a nonwoven fabric, a fibrous layer or a batt assembled and in any way interconnected and wherein the fibers need not be straight.
  • a nonwoven material is not a fabric in which threads are crossed at right angles to one another to form a textile surface fabric. The nonwoven material can be easily brought into a shape, so that an extreme shaping can be achieved with the nonwoven material.
  • a backing pad can be produced, compared to the conventional backing pads of cotton or fiberglass fabrics a comparatively large axial distance between the clamping surface, which is in use of the grinding wheel with the clamping nut in plant, and ensures the radial plane.
  • the radial plane represents that plane of the grinding wheel which has the greatest axial distance to the clamping surface.
  • the grinding wheel is in flat contact with a flat surface with the radial plane defining face flat with the ground in abutment. All other sections of the grinding wheel thus remain behind the end face.
  • a deep-set attachment portion is provided by the design of the grinding wheel with the backing pad of nonwoven material.
  • the clamping nut which holds the grinding wheel in use on a tool spindle and, in particular, clamps it against a clamping flange of a drive machine, can be arranged completely between the clamping surface and the radial plane within the grinding wheel due to the cup-shaped or dish-shaped basic shape thus formed.
  • the clamping nut can remain behind the effective range of the abrasive or the radial plane and is not above the grinding surface of the grinding wheel during grinding.
  • the clamping surface in particular the entire fastening portion, is arranged at right angles to the axis of rotation and thus parallel to the radial plane.
  • this cup shape of the support plate with a depth of at least 6 mm contributes to increased stability of the support plate. Greater depths of, for example, 7, 8, 9, 10 mm or more are naturally also conceivable.
  • the support section adjoining the fastening section radially outward is bent at least in sections.
  • This curved section is a transition region of the support section, to which an edge region of the support section connects radially outward. Due to the deeply curved design of the backing pad can provide increased security or contribute to material savings or weight reduction by designing a thinner support plate.
  • the nonwoven material contributes to the damping of the grinding wheel.
  • the known support plates made of a fabric for damping an additional layer, for example of an elastomer must be provided in the otherwise very hard fabric carrier.
  • the abrasive comprises an abrasive carrier on which the abrasive grain is applied.
  • the abrasive carrier is at least connected to the support portion of the support plate, in particular glued to this.
  • the abrasive backing may be a paper abrasive cloth, a synthetic fiber fabric such as polyester, natural fibers such as cotton, flax, hemp, kenaf, or blended fabrics.
  • the abrasives are adhered to the support portion of the support plate with the same binder used to bond the nonwoven material of the support plate.
  • the abrasive cloth may have a fabric as a carrier material.
  • the fabric carrier of the abrasive cloth adapts well to the strongly profiled cup-shaped support plate.
  • the abrasive cloth can be pulled into the recessed attachment portion, stretched, pressed or applied in any other way.
  • the abrasive cloth can be connected to the support portion and in addition to the attachment portion.
  • the abrasive cloth has a central recess through which the tool spindle of a drive machine for rotating the grinding wheel can pass.
  • the abrasive comprises an annular abrasive blank.
  • reinforced abrasive blanks can be provided, wherein the abrasive carrier of the grinding blank from the outside Shen on the support portion of the support plate attached, in particular can be glued.
  • the abrasive blank may also be divided into several segments which abut one another butt-shaped in the circumferential direction and together form an abrasive blank.
  • the support plate consists at least along the support section only of the nonwoven material bound with binder.
  • the backing pad is made in one or more layers from the nonwoven material along the support section and has no fabric layers. That is, at least the support portion may be made of either a single ply of bonded nonwoven material or multiple ply bonded nonwoven material. In principle, the individual layers may also have different nonwoven materials.
  • the layers can preferably be arranged one above the other flatly, ie in the direction of the axis of rotation, and in particular adhesively bonded to one another by the binder.
  • the single-layer or multi-layer support section, on which the abrasive is applied, is designed to be self-supporting. This means that the support plate in the support section has no further the structure, or the sustainability of the nonwoven material reinforcing means. Instead, the stability of the support section is determined only by the nonwoven material bonded with the binder. In this case, the bonded nonwoven material can be soaked, for example, with the binder and / or offset.
  • the abrasive article may be, for example, a fabric backed abrasive wheel, for example, XK885, XK870, ZK765 from VSM, Cubitron 2 from 3M, or any other abrasive cloth available on the market.
  • a fabric backed abrasive wheel for example, XK885, XK870, ZK765 from VSM, Cubitron 2 from 3M, or any other abrasive cloth available on the market.
  • the support plate during grinding starts from a radially outer edge region, wears off radially inwardly continuously.
  • abrasive during Sanding be removed, with the wear, or the gradual exhaustion of the support plate, especially up to the complete exhaustion of the support portion of the support plate, is always radially further inboard, previously unused abrasive for the grinding process available.
  • abrasive grains are always available with high sharpness throughout the grinding process, and the worn blunt abrasive grains are removed or thrown away by the support plate which is continuously smaller in radius. This improves the sanding pattern.
  • the abrasive grains of conventional vulcanized fiber discs dull with use, but adhere to the abrasive disc and can result in an uneven sanding pattern.
  • the grinding wheel according to the invention can be trimmed. Due to the configuration of the support plate made of nonwoven material, the support section can thus in particular be reduced in radius in a simple manner, in particular by trimming, or otherwise adapted to the shape and size required for the upcoming grinding process.
  • the entire support plate can be made in one or more layers of bonded nonwoven material self-supporting.
  • the individual layers may also have different nonwoven materials.
  • the nonwoven material is a Rei ßmaschinevlies.
  • the nonwoven material is made of synthetic fibers, recycled fibers, natural fibers or a mixture thereof.
  • the nonwoven material is a natural fiber fleece of hemp and / or kenaf fibers. In order to improve the mechanical strength of the support plate, the nonwoven material may be firmly needled.
  • the support plate has a reinforcement in the attachment section. Due to the reinforcement, the support plate is stabilized in the attachment section for the areal absorption of the clamping nut.
  • a reinforcement may in particular be a metal ring inserted in the backing pad from outside onto the backing pad or an insert ring which is arranged around a central receiving opening formed in the fastening section, through which the tool spindle of a drive machine engages.
  • the nonwoven material can be made thicker in the region of the fastening section compared to the support section and / or be provided with a larger amount of binder.
  • the fastening portion can have a reinforcement.
  • the self-supporting supporting section has no structures influencing the carrying capacity of the bonded nonwoven material.
  • the entire backing pad is made in one or more layers from the bonded nonwoven material self-supporting.
  • the support plate may be reinforced by a thicker nonwoven material in the attachment section in relation to the support section.
  • the backing pad may have a thickness of at least 1 mm and / or a maximum of 15 mm. Due to the design of the support plate of the nonwoven material, the required axial distance between the clamping surface and the radial plane of at least 6 mm can be produced well even at thicknesses of up to 15 mm. In principle, the support plate can also have a thickness of more than 15 mm, for example 16, 17, 18, 19 or 20 mm. Because the nonwoven material can be, in contrast to the relatively brittle fabric materials, easier or more deform during compression molding. Preferably, the thickness of the support portion connected to the abrasive is between 1 mm and 3 mm.
  • a proportion of the binder in the backing pad can amount to at least 15% and not more than 70% of the weight of the backing plate.
  • the proportion of the binder in the backing pad can be between 40% and 60%, based on the weight of the backing plate.
  • the binder is preferably phenolic resin-free duroplastic.
  • the unbonded nonwoven material of the support plate may have a basis weight of at least 300 g / m 2 and a maximum of 3500 g / m 2 . This produced sufficiently stable and even very stable support plates.
  • a maximum axial extent that is, in the longitudinal direction of the axis of rotation of the support plate is at least 10 mm.
  • a grinding wheel is provided, in which the clamping nut and preferably also the After attaching the grinding wheel to the drive machine, do not project the tool spindle beyond the radial plane. This prevents inadvertent contact of the tool spindle or the clamping nut with the workpiece to be machined during grinding.
  • the height, or the maximum axial extent of the support plate at least 12 mm, in particular more than 14 mm.
  • the height of the support plate 10, 1 is 1, 12, 13 or 14 mm.
  • the support section may have a planar partial section, which lies in particular radially outside the curved transitional area of the support section.
  • the planar section includes an angle of 0 ° to 10 ° with the radial plane. Due to the deep cup-shaped basic shape of the support plate, the clamping nut is countersunk between the clamping surface and the radial plane, so that the flat section of the support section can advantageously be designed very flat, ie with a relatively small angle to the radial plane, without the danger the contact of the workpiece to be machined by the clamping nut consists.
  • the aforementioned angle may even be less than 5 °, in particular less than 4 °, 3 ° or 2 °.
  • the angle can be equal to 0 °.
  • the support plate has a bent shape, in which the flat portion is aligned parallel to the clamping surface.
  • the support section may have a curved partial section, which lies in particular radially outside the bent transitional area of the support section. Due to the curved configuration of the support section, particularly good grinding properties are obtained in the flat up to the steep starting of the grinding wheel relative to the workpiece to be machined.
  • the curved section can connect radially outside to the transition region of the support section o- include this.
  • the curved section can continue the radius of the transition region or be curved differently.
  • the curvature may in particular follow a circular path.
  • the curved section extends to a radially outer outer edge of the support plate.
  • a secant viewed in the longitudinal section of the grinding wheel viewed through the maximum of the curvature, that is, through the point with the maximum axial distance to the clamping surface, and through the radially outer outer edge, can with the radial plane maximum angle of 1 ° to 10 °.
  • the curvature can be formed very flat, whereby a very easy-to-handle grinding wheel is provided, which can be well used even in a workpiece to be machined with complex geometric shapes.
  • a radially outer edge region of the support section can be angled relative to the radial plane and in particular form an outer peripheral surface.
  • this edge region can form a cylindrical or conical or curved outer peripheral surface.
  • the attachment portion is preferably free of abrasives.
  • the abrasive preferably contains sol-gel corundum and / or zirconia corundum as the abrasive grain. In particular, grain sizes of at least 40 ⁇ are provided.
  • the abrasive may have abrasive fillers.
  • the grinding wheel has the clamping nut.
  • the clamping nut is firmly connected to the grinding wheel.
  • the clamping nut can already be factory-connected to the grinding wheel and is disposed of after use of the grinding wheel with this.
  • the user does not need its own clamping nut for the use of the grinding wheel.
  • the clamping nut may, for example, be made entirely of plastic or of plastic with a metal threaded insert or of metal entirely. So that the clamping nut does not become loose during use of the grinding wheel, it can have a thread of opposite design to a grinding direction predetermined for the grinding wheel.
  • the support plate can have radial recesses in the form of visible recesses.
  • the support plate preferably the entire grinding wheel, is rotationally symmetrical with respect to the axis of rotation, or respectively the center longitudinal axis of the grinding wheel.
  • Figure 1 is a plan view of a grinding wheel according to a first embodiment of the present invention
  • Figure 2 is a sectional view of the grinding wheel of Figure 1 along the line II-II;
  • FIG. 3 is a plan view of a grinding wheel according to a second embodiment of the present invention.
  • Figure 4 is a sectional view of the grinding wheel of Figure 3 along the line IV-IV with abrasive in the form of a Schleifronde;
  • FIG. 5 shows a sectional view of the grinding wheel from FIG. 3 with an alternative abrasive in the form of an abrasive cloth;
  • Fig. 6 is a plan view of a grinding wheel according to a third embodiment of the present invention
  • Figure 7 is a sectional view of the grinding wheel of Figure 6 along the line IX-IX with a Schleifronde
  • Figure 8 is a sectional view of the grinding wheel of Figure 6 with an alternative abrasive in the form of an abrasive cloth.
  • Figures 1 and 2 show a grinding wheel according to a first embodiment of the present invention.
  • the grinding wheel 1 has a backing pad 2 made entirely of a single layer bonded nonwoven material is made, or exists.
  • the nonwoven material is bonded with a binder such as phenolic resin-free thermoset.
  • the proportion of binder in the backing pad 2 is at least 15% and at most 70% of the weight of the backing pad 2, depending on the rigidity requirement.
  • the unbonded nonwoven material has a basis weight of at least 300 g / m 2 and a maximum of 3500 g / m 2 .
  • constant thickness D is here 4 mm, but may in principle be between at least 1 mm and preferably at most 15 mm. Alternatively, the thickness may also follow a thickness profile in which the thickness varies in the radial direction.
  • the backing pad 2 made of the bonded nonwoven material is rotatably drivable about a rotation axis X.
  • the axis of rotation X is a central longitudinal axis of the grinding wheel 1, to which the grinding wheel 1 is rotationally symmetrical.
  • the support plate 2 has a central receiving opening 1 1, through which a tool spindle, not shown, of a drive machine for rotating the grinding wheel 1 can engage, or engages during operation of the grinding wheel 1.
  • Concentric with the axis of rotation X is a mounting portion 3 with an annular clamping surface 4, which is aligned at right angles to the axis of rotation X, is provided.
  • the flat clamping surface 4 is designed for surface receiving a clamping nut 5.
  • the clamping nut 5 is made of plastic and firmly glued to a front side 17 of the support plate 2 in the attachment portion 3. About the clamping nut 5, the grinding wheel 1 can be attached to the drive machine.
  • the support section 6 has an S-shaped transition region 7 and a radially outer edge region 8.
  • the edge region 8 is angled slightly downwards in the direction of the clamping surface 4. Specifically, the edge region 8 is flat, that is not arched, formed and includes viewed in the longitudinal section of the grinding wheel 1 with the radial plane E an angle of 2 °.
  • the radially outer edge region 8 thus forms a conical outer circumferential surface 18 of the grinding wheel 1.
  • an abrasive in the form of an annular abrasive disk 9 is glued on the front side 17 of the flat edge region 8 of the support plate 2 and slightly, in particular 1 to 10 mm, on the inwardly bent transition region 7, an abrasive in the form of an annular abrasive disk 9 is glued.
  • the abrasive means 9 also at least partially covers the transition region 7, a good grinding result can be achieved with the grinding wheel 1 even with a flat angle of attack to the workpiece to be machined, as is necessary, for example, in surface grinding.
  • the abrasive blank 9 has, as an abrasive carrier 19, which may also be referred to as a base, an abrasive cloth of a fabric, such as a synthetic fiber fabric made of polyester, a blended fabric or a natural fiber fabric, for example, cotton, flax, hemp or kenaf.
  • the pad 19 of the abrasive 9 can also be made of paper.
  • Solder gel corundum and / or zirconium corundum having grain sizes of at least 40 ⁇ (for example FEPA grain size P36) is preferably applied to the base 19 of the abrasive blank 9 as abrasive grain.
  • the abrasive 9 on abrasive fillers are preferably applied to the base 19 of the abrasive blank 9 as abrasive grain.
  • the abrasive 9 thus covers the edge region 8 of the support section 6 and protrudes slightly beyond the boundary 10 located between the edge region 8 and the transition region 7 maximum 10 of the support plate 2 into the curved transition region 7.
  • the bonded-on abrasive 9 forms an annular end face 12.
  • the end face 12 defines a radial plane E, ie a plane aligned at right angles to the axis of rotation X, which is maximally axially spaced from the clamping surface 4.
  • the axial distance t between the clamping surface 4 and the radial plane E determines the total depth of the cup-shaped support plate viewed in longitudinal section 2.
  • the axial distance t is 8 mm here, so that the commercial clamping nut 5 shown here is completely sunk within the support plate 2 and not on the Radial plane E projects axially. Due to the depth t of here 8 mm results from the here 4 mm thick backing pad 2 in turn an overall height h of 12 mm.
  • FIGS. 3 to 5 show a grinding wheel 1 'according to a second embodiment of the present invention, components which correspond to those described above Grinding wheel 1 match, are provided with the same reference numerals.
  • the grinding wheel 1 ' Unlike the grinding wheel 1 according to the first embodiment of the present invention shown in FIGS. 1 and 2, the grinding wheel 1 'according to the second embodiment of the present invention has no tightening nut 5 fixedly connected to the backing pad 2. Instead, a conventional clamping nut associated with the prime mover is used to secure the grinding wheel 1 'to the tool spindle of the prime mover.
  • the grinding wheel 1 ' has a concentrically arranged around the receiving opening 1 1 and used in the support plate 2 reinforcing ring 13 made of metal.
  • the metal ring 13 of the mounting portion 3 is mechanically reinforced, against which the clamping nut is tightened when attaching the grinding wheel 1 'to the prime mover.
  • the metal ring 13 is fixedly connected to the nonwoven material of the support plate 1, in particular glued.
  • Figures 4 to 5 differ only by the different configuration of the abrasive 9, 9 ', 9 ", 9'".
  • FIG. 4 the abrasive material is glued onto the transition region 7 of the support section 6 as an annular abrasive blade 9 concentric with the axis of rotation X on the outer edge region 8 and slightly, in particular with approximately 5 to 15 mm.
  • FIG. 5 shows the abrasive article with a glued-on abrasive cloth 9 ', which is adhesively bonded to the front side 17 of the support plate 2 and also covers the transition region 7 of the support section 6 and the attachment section 3 beyond the edge region 8.
  • the abrasive cloth 9 ' has a central recess.
  • the abrasive cloth 9 ' is also glued to radially outwardly facing side surfaces 14 of the support plate 2.
  • a grinding wheel 1 "according to a third embodiment of the present invention is shown, wherein components which correspond to the above-described grinding wheel 1, 1 'are given the same reference numerals Grinding wheel 1 "here has no concentric to the receiving opening 1 1 in the support plate 2" introduced reinforcement in the form of the metal ring 13. To fasten the grinding wheel 1 "to the tool spindle, the grinding wheel 1" has the clamping screw 5 fixedly connected to the fastening section 3, which rests on the clamping surface 4.
  • the support plate 2 has a curved radial edge region 8".
  • the curved edge region 8 extendends starting from the transition region 7 of the support section 6" as far as a radially outer outer edge 16 of the support plate 2.
  • the support section 6 itself has a maximum 10 at that point on the front side 17 of the support plate 2 " has the maximum axial distance to the clamping surface 4.
  • the total depth of the support plate 2 is determined by the maximum axial distance t between the clamping surface 4 and the radial plane E.
  • the maximum axial distance t here is at least 6 mm, preferably at least 8 mm, for example 9 mm.
  • the clamping nut 5 glued here by way of example firmly to the clamping surface 4 is completely countersunk within the support plate 2, that is to say the clamping nut 5 "does not project axially beyond the radial plane E.
  • the depth t of, for example, 6 mm results from the example, 4 mm thick backing pad 2 "a total height h of 10 mm.
  • the curvature of the edge region 8 corresponds, with a view to the longitudinal section of the grinding wheel 1" shown in FIG. 7, to an angle a which is considered by a secant 15, which in longitudinal section of the grinding wheel 1 "is considered by the maximum 10 of the curvature and by a radially outer outer edge 16, is enclosed with the radial plane E.
  • the angle ⁇ is preferably 2 °, 3 °, 4 ° or 5 °, wherein the angle ⁇ can in principle also be greater than 5.degree ..
  • the radially outer edge region 8 "thus forms a curved one Outer peripheral surface 18 of the grinding wheel 1 ".
  • the grinding wheel 1 "shown in FIG. 8 differs from the grinding wheel 1" according to FIG. 7 only by the different configuration of the grinding means 9 '.
  • the abrasive 9 'shown in FIG. 8 is on the front side 17 of FIG Grinding wheel 1 "glued on reinforced abrasive cloth, ie the abrasive cloth 9 'has a base 19.
  • the abrasive cloth 9' covers both the support portion 6" and the mounting portion 3.
  • the clamping nut 5 fixedly connected to the grinding wheel 1 "is glued directly onto the grinding cloth 9 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne une meule munie d'un disque d'appui (2) qui est produit à partir d'un matériau non-tissé lié par un liant et qui présente une partie de fixation (3) munie d'une surface de serrage (4) annulaire servant à recevoir un écrou de serrage (5), et une partie de support (6) radialement plus à l'extérieur en partant de la partie de fixation (3), la partie de support (6) étant produite en une couche ou en plusieurs couches et auto-porteuse à partir d'un matériau non-tissé lié, et munie d'un élément de meulage (9) relié à la partie de support (6) du disque d'appui (2). Une face frontale (12) de l'élément de meulage (9) définit un plan radial (E) espacé de manière axiale de la surface de serrage (4). Le moyen de meulage présente un flan de meulage (9) annulaire muni d'un support d'élément de meulage sur lequel sont appliqués des grains abrasifs, et une distance axiale (t) entre la surface de serrage (4) et le plan radial (E) est d'au moins 6 mm.
EP16747464.2A 2015-07-22 2016-07-22 Meule munie d'un disque de support non-tissé Withdrawn EP3325216A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015111899.8A DE102015111899A1 (de) 2015-07-22 2015-07-22 Schleifscheibe mit einem Vlies-Stützteller
PCT/EP2016/067581 WO2017013259A1 (fr) 2015-07-22 2016-07-22 Meule munie d'un disque de support non-tissé

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CN108115597A (zh) * 2017-12-26 2018-06-05 王文斌 组合减震降噪磨具
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DE102009038583A1 (de) 2009-08-22 2011-03-03 August Rüggeberg Gmbh & Co. Kg Schleif-Werkzeug
JP2011079113A (ja) * 2009-10-09 2011-04-21 Tenryu Saw Mfg Co Ltd 円板状回転工具の取付け装置
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