EP3334563A1 - Schleifteller und damit ausgestattete schleifmaschine - Google Patents
Schleifteller und damit ausgestattete schleifmaschineInfo
- Publication number
- EP3334563A1 EP3334563A1 EP16745437.0A EP16745437A EP3334563A1 EP 3334563 A1 EP3334563 A1 EP 3334563A1 EP 16745437 A EP16745437 A EP 16745437A EP 3334563 A1 EP3334563 A1 EP 3334563A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- processing surface
- abrasive
- sanding
- central region
- region
- 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
Links
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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
- B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
-
- 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
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/02—Backings, e.g. foils, webs, mesh fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/04—Zonally-graded surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
- B24D9/085—Devices for mounting sheets on a backing plate
Definitions
- the invention relates to a sanding pad for a grinding machine, wherein the sanding pad has a machine side associated with the grinding machine and a processing surface associated with a machining of a workpiece, wherein on the machine side a tool holder for mounting on a tool holder of the grinding machine and on the processing surface an abrasive for machining a workpiece or holding means are arranged for releasably holding such an abrasive.
- a sanding pad is designed for machining a flat or planar surface of a workpiece.
- the sanding pad has a plate-like or plate-like shape, i. it is particularly suitable for even surfaces.
- Grinding plates are known for special applications, which have a special profile, such as a grinding plate from DE 101 44 274 A1 for working surfaces formed.
- a grinding plate from DE 101 44 274 A1 for working surfaces formed.
- An enhanced abrasive effect in the central region of a grinding plate is explained in DE 32 40 917.
- the known sanding plates are readily applicable.
- grinding machines with a handle bar in particular ceiling grinding machines and wall grinding machines, such grinding plates are difficult to perform. Due to the relatively large distance between the grip area on the handle bar and the working surface of the sanding pad difficult-to-handle force conditions arise for the operator.
- the machining surface of the sanding pad has an annular edge region for forming a flat bearing surface of the abrasive on the workpiece and a central region surrounded by the annular edge region, wherein the annular edge region in front of the central region projecting towards the workpiece and / or wherein the sanding disk has a smaller compression modulus in the central region than in the edge region, so that essentially only the edge region for abrasive machining of the workpiece in the direction of the workpiece is loaded in the direction of the machining surface when the contact pressure acting on the tool mounting holder or in contact with the workpiece.
- the sanding pad rotates at a higher peripheral speed, which among other things also contributes to a higher removal rate or abrasion performance.
- the abrasive in the central area is not in contact or only in light rubbing contact with the workpiece. It is preferably provided that the contact pressure in the edge region of the processing surface in the direction of the workpiece is approximately 1.5 times to 2 times greater, preferably approximately three times greater or four times greater than in the central region. It is preferred that about 70-80%, preferably about 80-90%, even more preferably about 90-95%, of the abrasive performance of the abrasive be provided in the edge region of the processing surface, the remaining abrasive performance of the abrasive in the central region.
- the annular edge region represents, so to speak, the actual processing region of the abrasive, with which the workpiece can be abraded.
- the central area is ineffective in terms of workpiece machining by the abrasive or at least to a lesser extent effective, advantageously substantially ineffective, so that no forces or low forces from the central area on the tool holder and thus, for example, on the handle bar or other Handle back area of the grinding machine.
- the grinding machine can be optimally held and guided.
- the sanding pad can be smoothly and evenly guided over the workpiece surface to be machined.
- the abrasive may be disposed directly on the processing surface or form the processing surface.
- an abrasive coating can be provided directly on the sanding pad.
- the processing surface may comprise the abrasive coating, which for example comprises or is formed by abrasive grain and / or a grinding knit.
- the abrasive is releasably attachable to the sanding pad, so that it can be removed, for example, wear and replaced with another abrasive.
- the abrasive is expediently designed as an abrasive sheet or sandpaper.
- the abrasive may also be a grinding knit or have such.
- the holding means comprise, for example, in the manner known per se
- Velcro holding means such as corresponding Velcro hooks.
- the holding means comprise an adhesive or the like other releasable connection means between the abrasive and the sanding pad.
- a grinding agent which can be detached from the sanding pad can also form a particularly integral part of the sanding pad.
- the effect of the sanding pad occurs in conjunction with the abrasive.
- the sanding pad may be designed so that the abrasive in the annular edge region of the sanding pad is always in contact with the workpiece, but not in the central region.
- a distance of the working surface to the workpiece surface is expediently present.
- a bulge and / or a recess may be provided in the central area, which provides or contributes to the abrasive in the central area has a distance from the workpiece or at least unfolds a lower abrasive effect than at the edge region.
- a more compliant compared to the edge region central region is provided, for example, a central region with a softer material than at the edge region, so that the contact pressure or force of the abrasive is less in the central region than in the edge region.
- the more compliant material may be provided in a plane immediately adjacent the processing surface or on the processing surface.
- the processing surface for example for carrying the abrasive, may be provided directly on the softer material of the central region or the harder material of the edge region. But it is also possible that the softer material for the central region does not directly have the processing surface, but that, for example, still a sandwich layer between the processing surface and the harder in the edge region and softer in the central area material is provided.
- the sandwich layer can be provided, for example, by a so-called ubend or an elastic or soft cushion.
- both measures in combination contribute to the fact that the sanding disc or the abrasive disposed on the sanding pad is not in abrasive contact with the workpiece to be machined in the central region or to a lesser extent than in the edge region of the machining surface.
- the abrasive for machining the workpiece and / or the holding means for holding the abrasive expediently extend substantially over the entire processing surface including the center thereof.
- the central area can thus be used for machining the workpiece based on the abrasive.
- the processing surface and / or the abrasive and / or the holding means expediently have air outlets for the supply of fresh air and / or removal of exhaust air, for example with exhaust-laden exhaust air. It is preferably provided that the air passages of the abrasive material and the processing surface communicate with each other so that air laden with dust can flow from the workpiece surface through the abrasive medium to a side of the grinding plate, for example the upper side thereof, facing away from the processing surface.
- the air outlets thus expediently extend from the processing surface to an upper side or rear side of the grinding plate facing away from the processing surface.
- a preferred concept provides that the air outlets are arranged in a ring around a central axis of the sanding pad.
- One or more rings may be provided.
- the rings are preferably arranged concentrically around the central axis.
- Sanding plate is closer to an inlet opening of a dust removal device of the grinder, so that supply air flows through further removed from the intake air outlets in the sanding plate, in particular to the processing surface and / or to the holding means, transverse to the processing surface, for example, the holding means and / or the processing surface, in particular, the surface facing the workpiece or provided with abrasive material surface, flows through and then flows through air outlets, which are each closer to the intake.
- the role of the air vents changes as the sanding pad rotates.
- a transverse flow is generated, in particular in the region of the working surface or of the holding means, so that it does not or does not add dust.
- this transverse flow is in Provided central region of the sanding pad, where so where possible, as little pressure or contact pressure acts in the direction of the working surface.
- air outlets or air inlets are provided for the removal of dust-laden air only in the central region of the sanding pad.
- the air outlets have a radial component, i.e. that they comprise, for example, air ducts which extend radially outward from the central area to the top or rear of the sanding pad where the suction device acts.
- suction openings or suction openings may also be provided in the edge area or exclusively in the edge area. Thus, both are possible, namely suction openings only at the edge area of the processing area or only in the central area or both at the edge area and in the central area. If suction or air outlets are provided or only in the central area, for example, creates a kind of suction bell on the processing surface.
- processing surface and / or the abrasive and / or the holding means apart from the air passages or air inlets have no interruptions.
- the processing surface and / or the abrasive and / or the holding means are expediently designed and / or provided for surface contact with the workpiece.
- a preferred concept provides that slits or interruptions or deformation contours or combinations thereof are provided on the working surface and / or the grinding means and / or the holding means, the flatness of the processing surface, in particular of the edge region thereof, on the workpiece upon deformation of the processing surface facilitate or allow from a state unloaded by the contact pressure in a loaded by the contact pressure state.
- a flat around a central axis of the sanding plate flatness is preferred.
- the slots or interruptions expand, for example, in a deformation by the contact pressure on or give way.
- the deformation contours may include, for example, wave-shaped indentations, joints or the like.
- the working surface or the abrasive or the holding means in the sense of deformability is yielding, in particular uniformly yielding when the deformation contours, slots or interruptions or combinations thereof are provided.
- the slots and / or interruptions and / or deformation contours advantageously have a longitudinal shape.
- the slots and / or breaks and / or deformation contours are particularly advantageous radially or radially with respect to a center axis of the sanding pad.
- the sanding pad can deform in the manner of a bell, for example in the unloaded by the contact pressure state, while it can be pressed flat under load by the contact pressure and thereby ensure the deformation contours, slots or interruptions the corresponding compliance.
- interruptions, deformation contours or slots in the holding means for example when this comprises fibers or a fabric structure.
- a textile or fiber-based or fabric-based velcro or Velcro layer may be provided as an adhesive, but with respect to warp and weft or at least the direction of their fibers is tensile than transverse to it.
- a fabric of a burdock for example, has different stiffnesses in the weaving direction or transverse to the weaving direction, which leads to different forces in the Velcro layer when heated. Due to the deformation contours, it is possible that these fibers are variable in length with respect to their longitudinal direction.
- the interruptions and / or slots it is possible that these fibers are interrupted and, accordingly, the adhesive or the Velcro layer is easier to deform or yield.
- the slots, interruptions and deformation contours or combinations thereof are preferably particularly advantageous in the annular edge region, in any case the region which is in abrasive contact with the workpiece during typical workpiece machining. If the slots, interruptions or deformation contours are provided in the adhesive layer, for example, the abrasive may in turn be continuous, ie have no interruptions or slots, so that it rests flat on the workpiece.
- a measure which is in combination with the previous measures or is independent of itself advantageously provides that the holding means comprises a film or extrusion tape. Furthermore, it is expedient if the holding means contains no fibers. All of these measures contribute to a uniform deformability of the holding means, so that this evenly yields under load by the contact pressure over the circumference (ie in the circumferential direction about the central axis of the grinding disc) and / or forms a continuous plane surface when resting on the workpiece. This counteracts or avoids a so-called rash or flattening of the sanding plate.
- the extrusion calk for example, significantly more stable in temperature and deforms at low heat, for example, in a range up to 60 ° not or only slightly.
- the extrusion calk for example, significantly more stable in temperature and deforms at low heat, for example, in a range up to 60 ° not or only slightly.
- the film may be an extrusion film or adhesive film.
- the extrusion foil or adhesive sheet may also be an intermediate layer provided between the holding means and a resilient pad.
- the film or extrusion Klette is connected by means of a bonding agent film with an elastic pad of the sanding pad.
- the pad may firstly be provided with the bonding agent film, to which in turn the film or extrusion burr is attached or glued.
- the elastic pad for example, a corresponding foam, is attached to the film or Extrusionklette by foaming or is foamed.
- a convenient measure provides that no component or at most a backing pad, softer soft components of the sanding pad (for example, elastic pad or adhesive or both) carries fibers.
- no component or only the support plate contains transversely to the processing surface extending fibers.
- fibers it is thus possible for fibers to be present in such components or in the sanding pad, which however do not run transversely to the machining surface or parallel to the machining surface. Such fibers do not hinder deformation of the sanding plate under load by the contact pressure in the direction of a flat position on the workpiece.
- the processing surface has a step and / or an inclined surface, for example a conical inclined surface, between the edge region and the central region, so that a depression, for example a depression, is formed in the central region.
- the central area may have a flat surface or flat surface.
- the central region may have an oblique surface or step or both to the edge region in radially outward, the oblique surface or step then being provided between the edge region and the inner region of the central region and this inner region being flat.
- the tool holder can, for example, have a breakthrough for a bolt, so that the sanding pad, for example, on a screw projection or bolt having tool holder of the grinding machine can be mounted. It is also possible that the tool holder holder, for example form-fitting contours, in particular lingkonturen or bayonet contours for screwing the tool holder comprises.
- the tool holder can also include a screw or other fastening projection.
- the mechanical structure of the sanding plate can be designed differently, which will become apparent below.
- the sanding pad has a backing pad on which an elastic pad or pad is arranged.
- the backing pad has the machine side.
- the side facing away from the pillow or Päd side of the support plate forms expediently the machine side.
- the processing surface is provided at the side facing away from the support plate side of the pad.
- the working surface may be integrally provided on the cushion. But it is also possible that the processing surface is provided on a further, arranged on the pad layer.
- the cushion is preferably fixedly connected to the support plate, for example glued to it and / or welded. Also, a mechanical connection, for example, a deadlock, between support plate and cushion is possible.
- the tool holder is arranged on the support plate.
- the tool holder can form an integral part of the support plate or be attached to this.
- the pillow forms, for example, a so-called ped or has a ped.
- the cushion or Päd consists of an elastic
- Foam or plastic or has such a material Foam or plastic or has such a material.
- the pad or ped can also be made of rubber or have rubber.
- a support surface of the support pad for holding the pad facing the work surface has a support edge portion associated with the edge portion of the work surface or the abrasive, and a support center portion associated with the central portion of the work surface.
- the support edge region protrudes further in the direction of the processing surface than the support central region.
- the Backing pad is slightly less rigid in the central area than at the support edge area. The support edge region is therefore correspondingly stiff and not very flexible, so that it better supports the abrasive on its edge region than in the central region.
- the central support region can, for example, have a recess or an inward curvature in a direction away from the processing surface, so that the central region of the processing surface is loaded less strongly or not at all in the direction of the workpiece.
- a cushion may be arranged on such a support plate whose material thickness in the edge region and central region is the same or at least substantially the same.
- the sanding pad according to the invention preferably has such a pad.
- the measures for forming the planar edge region are provided, so to speak, by the support plate.
- a material thickness of the pad or of the support plate or both in the edge region and in the central region is substantially equal or even exactly the same.
- the support plate or the cushion are so to speak the same thickness both in the edge area as well as in the central area.
- a material thickness of the pad and / or the support plate over the projection surface of the processing surface is the same or substantially equal.
- the properties of the invention are achieved.
- the geometrical variations namely that the edge region projects farther to the workpiece than the central region, at least when the sanding disk is loaded, can be achieved, for example, with a cushion having the same material thickness over the entire cross section or in the edge region and central region. Area of the support plate which has a geometric shape such that the edge region further protrudes to the workpiece to be machined as the central region.
- a material thickness of the pad or support plate varies and yet the following variant is feasible: a distance of the machining surface facing bottom of the pad or the support plate or both to the processing surface in the edge region and the central region substantially equal or even exactly the same.
- the central support area and the support edge area can merge continuously.
- an oblique surface in particular a conical inclined surface, is provided between the support central region and the support edge region.
- the support central region has a depression, in particular a depression, in relation to the support edge region.
- the cushion is expediently on its lower side facing the working surface or the lower side forming the working surface farther to the working surface or at least further in the direction of the workpiece than in the central region.
- a depression in particular a depression, is formed on this side of the cushion.
- a step, inclined surface or both is expediently present.
- the sanding pad as a whole can have a concave shape in the area of the machining surface, so that the central area is arched away from the working surface or workpiece surface.
- the support plate is configured concave a concave holding portion for the cushion and / or the cushion at its intended for workpiece machining surface.
- At least one air passage for a fresh air stream or a dust-laden dust air stream is expediently present at the central region of the sanding disk, the at least one air passage extending between the machining surface and the machine side.
- exhaust air can be sucked off at the machine side facing away from the processing surface and / or fresh air can be supplied to the processing side.
- the at least one air passage expediently forms part of an arrangement of a plurality of air passages, for example annular, linear, star-shaped or the like air passages arranged next to one another. It is also conceivable that air outlets are provided with different function, of which at least one air passage for supplying fresh air and another air passage are provided for the removal of dust.
- the sanding pad is substantially circular.
- the processing surface is an annular surface.
- the approach according to the invention can also be used with non-circular grinding plates.
- an area ratio between the peripheral area and the central area is about three to one or two to one.
- An area of the edge area is, for example, twice to three times larger than an area of the central area.
- the edge area can only be 1.5 times larger than the central area in relation to its area.
- the central area is still significantly smaller, so that, for example, an area of the peripheral region is between 3.5 times and four times larger than an area of the central region.
- the holding means for the abrasive are provided only at the edge region.
- the abrasive in the central area does not find a grip on the processing surface.
- no retaining means are provided on the radially outer edge or outer peripheral region of the edge region.
- this measure can contribute to making the abrasive more easily readable from the working surface.
- the abrasive material it is possible for the abrasive material to be able to move freely away from the workpiece to be machined at the radially outermost portion of the edge region, which is favorable, for example, for certain workpiece machining operations.
- the outer circumference region can also be curved in a sense away from the surface to be machined of the workpiece or have a step or both. This measure also works in the aforementioned sense. This measure can, for example, contribute to so-called scoring or other irregularities on the ground surface of the workpiece not occurring or being present to a lesser extent.
- the abrasive may, for example, be plate-like or disk-like, for example comprising an abrasive sheet.
- a contour of the abrasive is adapted to a contour of the processing surface, so that, for example, the abrasive has a recess in the central region of the processing surface.
- the abrasive spans a part of the central area at a distance from the processing surface.
- the abrasive may bridge a depression or depression in the central area.
- the abrasive sheet or abrasive may be dodged or displaced away from the workpiece in a sense. This reduces the abrasive effect of the abrasive.
- the abrasive has, for example, a projection surface that corresponds to that of the processing surface.
- the abrasive can thus cover the entire processing area, including the central area.
- the abrasive is, for example, circular.
- the abrasive is provided substantially only at the edge region, that is, for example, annular.
- the abrasive may for example comprise or be an annular, in particular annular, sheet.
- the abrasive is in the processing of the workpiece only in the edge region in contact with the workpiece, while in the central region, a distance between the abrasive and the workpiece is present. This situation is especially true when the workpiece is substantially flat or even. Thus, no abrasive machining of the workpiece takes place in the central area. If the workpiece has a bulge or a hill, this can at least partially engage in the central region, so that at least a brief abrasive contact of the central region with the workpiece surface is possible. However, the normal situation will be that, in the case of a flat or planar workpiece surface, the central region of the processing surface or the abrasive arranged there has no contact with the workpiece surface.
- the workpiece may, for example, be the wall of a building or a room, but also a mobile workpiece, for example a wooden element, a building board, a piece of furniture or the like.
- Figure 1 is a perspective oblique view of a first grinding plate obliquely from below, the in FIG. 2 is shown in cross-section along a section line AA in FIG. 1,
- FIGS. 1, 2 obliquely from above
- Figure 4 is a perspective oblique view of a second grinding plate obliquely from below, the in
- FIG. 5 is shown in cross-section along a section line B-B in FIG. 4,
- FIGS. 3, 4 shows the sanding pad according to FIGS. 3, 4 obliquely from above
- FIG. 7 is a perspective view of a third sanding pad obliquely from below, which is in FIG.
- FIG. 8 is shown in cross-section along a section line C-C in FIG. 7,
- FIG. 10 shows a schematically represented grinding machine when using one of the sanding plates according to FIGS. 1 to 9 for processing a wall surface or a ceiling surface
- Figure 1 1 a further sanding plate with slots on its holding means
- Figure 12 is a schematically indicated method for producing a
- a grinding machine 90 has a grinding head 91 on which a tool holder 92 for grinding plates 10, 110, 210 is arranged.
- the tool holder 92 can be driven by a drive motor 93, which is arranged, for example, on the grinding head 91, in particular the housing 94, or on a handle 96 of the grinding machine 90.
- the drive motor 93 drives the tool holder 92 at least rotationally and / or eccentrically directly or via a gear 95.
- the drive motor 93 forms part of a drive unit 93A.
- the transmission 95 is included in the drive unit 93A.
- At least one rotational component is present, so that the sanding pad 10, 1 10, 210 is driven or drivable exclusively rotationally or rotationally with, for example, a so-called hypercycloid or other superimposed movement.
- the grinding machine 90 is a hand-held grinding machine.
- the grinding machine 94 is gripped and guided directly on its housing 94, for example a handle region 99.
- a grinding of a wall surface W at least in a standing height of a user for example in a lower, near-ground region of the wall surface W, quite possible.
- the grinding of a ceiling surface D would be cumbersome.
- the grinding machine 90 therefore has an elongated handle 96, so that, for example, an overhead grinding or at a remote from the user of the grinding machine 90 areas easily falls.
- the ceiling surface D or the wall surface W form, for example, workpiece surfaces of a workpiece generally designated as a workpiece V.
- the handle 96 includes, for example, a handle bar 98, which is hinged at least pivotably on the grinding head 91 via a hinge 97.
- the grinding head 91 can pivot relative to the handle bar 98, which facilitates its positioning relative to the surface to be ground.
- certain feedback effects on the housing 94 and thus ultimately also the handle 96 occur on the sanding plates 10, 110, 210.
- such repercussions are minimized or even avoided by the sanding plates 10, 110, 210.
- the sanding plates 10, 110, 210 each have a machine side 11 facing the grinding machine 90 and a processing surface 12, 12, 212 facing away from the machine side 11, the workpiece surface to be machined, for example the wall surface W or the ceiling surface D. ,
- the machine side 1 1 is provided on a support plate 13, 1 13, 213.
- the support plates 13, 1 13, 213 comprise plate-shaped support body 14, 1 14, 214, on whose machine side 1 1 a tool holder 15 is provided.
- the tool holder 15 includes, for example form-fitting contours 1 6, for example, bayonet contours or a screw thread, for attachment to the tool holder 92nd
- the tool holder 15 includes, for example, a receiving recess 22, which is not to be construed as limiting, e.g. a retaining projection would also be possible, e.g. a screw pin.
- a stiffening region 17 extends around the tool receiving holder 15, so that the central region of the grinding disc 10, 110, 210 is relatively stiff centrally on the machine side 11.
- a stiffening projection 18 extends on an outer periphery of the plate-like stiffening region 17, for example.
- the stiffening portion 17 is formed of a different material than the support body 14, 1 14, 214.
- the stiffening portion 17 is formed by a wall plate 19 which extends between a support projection 20 of the tool holder 15 and the holder in a Radial distance around the support projection 20 extending further stiffening projection 18 extends.
- a flexibility or compliance sanding pad 10, 1 10, 210 may be desired in certain places.
- a groove 21 or another recess on the machine side 1 1 is provided.
- the support plate 13, 1 13, 213, a pad 30, 130, 230 is arranged on a side facing away from the machine side 1 1 underside 23, which could also be referred to as a mounting side.
- An upper side 31, which could also be referred to as a plate side, of the cushion 30, 130, 230 is fixedly connected to a holding region 28 of the underside 23, for example adhered to and / or welded thereto or the like.
- the processing surface 12, 1 12, 212 On a side facing away from the top 31 bottom 32, the processing surface 12, 1 12, 212 is provided. At the processing surface 12, 1 12, 212 is added a holding means 33, for example adhesive, in particular a Velcro layer 34, for holding an abrasive 50, for example, an abrasive sheet 51 is provided.
- a holding means 33 for example adhesive, in particular a Velcro layer 34, for holding an abrasive 50, for example, an abrasive sheet 51 is provided.
- the abrasive means 50 has on its the processing surface 12, 1 12, 212 facing attachment side or top, for example, for the holding means 33 suitable counter contours 52, for example a Schiingen für with the holding means 33, for example, the Velcro layer 34, in the sense of holding the abrasive 50th on the cushion 30 or the processing surface 12, 1 12, 212 cooperate.
- the abrasives 50 On the side remote from the working surface 12, 12, 212, the abrasives 50 have, for example, a grain and / or an abrasive cloth and / or abrasive knit or other abrasive material 53 for abrading a workpiece surface, for example the ceiling surface D or the wall surface W.
- a surface extent of the abrasive means 50 corresponds approximately to the surface area of the processing surface 12, 12, 212. But it is also possible that the abrasive 50 have a larger area, for example, radially outwardly beyond the processing surfaces 12, 1 12, 212 protrude.
- Outer peripheral surfaces 35, 135, 235 of the cushions 30, 130, 230 may, for example, like the sanding pad 10, have an inclined section 36 and optionally also a cylindrical section 37, so that, for example, the machining surface 12 has a larger surface area than the underside 23 of the backing plate 13, or Also include only a cylindrical portion 137, 237, so that as in the sanding plates 1 10 and 210, a surface extent of the bottom 23 of the support plate 1 13, 213 and a surface extent of the working surfaces 1 12, 212 is approximately identical.
- the processing surfaces 12, 112, 212 each have an annular edge region 44, 144, 244, in which the processing surface 12, 12, 212 substantially flat on the surface to be processed, for example, the ceiling surface D or the wall surface W, rests.
- the abrasive 50 is pressed flat in the edge region 44 on the workpiece surface to be machined, so there takes place an abrasive processing.
- edge regions 44, 144, 244 surround central regions 45, 145, 245, where no or only a slight abrasive machining of the workpiece surface is provided.
- a contact pressure P which is exerted on the tool holder holder 15 in the direction of the processing surface 12, 112, 212, substantially in the edge regions 44, 144, 244, so that there the abrasive material 53, the workpiece V, for example, the ceiling surface D or wall surface W, processed abrasively, for example, grinding, while in the central region 45, 145, 245 in the case of the sanding plates 10, 210, a distance between the abrasive material 53 and the workpiece surface to be machined is present and thus no abrasive machining of the workpiece surface, For example, the ceiling surface D or wall surface W, takes place or a slight abrasive machining, such as in the case of the sanding pad 1 10th
- depressions 46, 246 are provided into which the abrasive 50 can deform.
- the abrasive 50 is not supported in the region of the recesses 46, 246, so that the abrasive material 53 in the central region 45, 245 is largely ineffective with respect to the abrasive machining of the workpiece V.
- the abrasive 50 is held over its entire surface on the processing area 12, 212, so that the recess 46, 246 is also present on the front side or processing side of the abrasive 50.
- the abrasive 50 thus assumes the contour of the processing surface 12, 21 2.
- a distance 47 which is shown schematically in FIG. 2 and FIG. 9, is present between the grinding material 53 and a workpiece surface of the workpiece V, for example the ceiling surface D or the wall surface W.
- the recess 46 is formed by a material thickness 38 of the pad 30 in the edge region 44 is greater than a thickness of the pad 30 in the central region 45.
- a distance of the bottom 23 of the support plate 13 to the processing surface 12 in the edge region 44 greater than a distance of the underside 23 of the support plate 13 in the central region 45.
- the central region 45 and the edge region 44 advantageously merge into one another continuously.
- the central area 45 has a substantially planar or planar inner area 48, which merges with conical inclined areas 49 into the edge area 44.
- a step 49A is provided between the inner region 48 and the edge region 44 (shown schematically).
- the pad 230 has a continuous material thickness 238.
- the recess 246 is formed in that the backing pad 213 has a support edge region 24 which projects in front of a support central region 25. Between the support edge region 24 and the central support region 25, an inclined surface 26 is provided. In any case, the central support region 25 forms a recess 27. In this recess 27 into the cushion 230 is permanently deformed, so that its underside 32 and thus the machining side 212 has approximately the same contour as the bottom 23 of the support plate 213.
- the cushions 30, 130, 230 consist for example of an elastic material, in particular of a foam material, rubber or the like.
- the pad 130 which is attached to the support plate 1 13, are deformed in the processing of the workpiece V in the direction of the support plate 1 13 (indicated in dashed lines).
- the support plate 1 13 structurally corresponds to the support plate 213, that is, it has the recess 27.
- the processing surface 1 12 is substantially flat or even.
- the pad 130 and thus the processing surface 1 12 can deform under load or the contact pressure P, which acts in the direction of the workpiece V, in the recess 27, which is a cavity in the not yet deformed pad 130, thereby forming the central region 145 with no or little abrasive machining of the workpiece V, while the edge portion 144 is supported by the support edge portion 24 so that the abrasive material 53 can machine the workpiece V in the edge portion 145 abruptly.
- a material thickness 138 of the pad 130 is approximately equal over the entire processing surface 12 1.
- the pad 130 and the pad 230 may be identical. As a result, the pad 130, 230 is particularly easy to produce.
- the cushion 30 with the depression 46 with the different material thicknesses 38, 39 for example by injection of suitable plastic material into a corresponding shape.
- a foam material or other elastic material 40 with a larger compression modulus than a foam material or other elastic material 41 which is used in the central region 45.
- the different materials 40, 41 in FIG. 2 are indicated by dashed vertical lines.
- an arrangement 70 of air passages 71 extends annularly around the tool holder 15.
- the air passages 71 extend from the machine side 1 1 to the processing surface 12, 1 12, 212. In the drawing, not shown, but appropriate, it is when the
- Abrasive 50 in particular coaxially or at least in addition to the air passages 71, also openings or air passages 54 have.
- an air flow in the form of, for example, a fresh air flow and / or a dust air flow between the workpiece surface to be machined and the machine side 1 1 can flow.
- the grinding machine 90 has a cover 94A under or within which the sanding plates 10, 1 10, 210 are arranged.
- the cover 94B is fluidly connected to a suction device 94A, which sucks dust from the cover 94B or its interior and thus also sucks dust, which for example flows out of the air passages 71.
- the dust removal device 94A is connected, for example, to a suction hose of a vacuum cleaner, so as to extract dust accumulating during machining of the workpiece V.
- FIG. 2 A particularly favorable flow concept is clear from FIG. 2, in which it is provided that the dust removal device 94A is arranged eccentrically to a center axis M of the sanding pad 10, 110, 210, so that exhaust air AL is exhausted via air passages 71 closer to the dust removal device 94A the air passages 71 is sucked.
- An intake port 94C of the dust discharge device 94A is disposed eccentric to the center axis M.
- the drain AL flows as supply air ZL through air passages 71 in the sanding pad 10, 1 10, 210, which is further away from the dust removal device 94A.
- the supply air ZL flows as a cross flow QS advantageously between the abrasive 50 and the holding means 33 or by the holding means 33 from the inflow-side air passages 71 to the outflow-side air passages 71, so that the
- the transverse flow QS is provided in particular in the support central region 25.
- the inner regions 48 have, for example, a diameter D1, the conical inclined surfaces regions including the inner region a diameter D2.
- the central regions 44, 144, 244 have the diameter D2.
- the substantially planiform edge regions 45, 145, 245 have a diameter D3.
- the edge regions 45, 145, 245 annular with an inner diameter D2 and an outer diameter D3.
- the diameter D3 is about 18-42 cm, while the diameter D2 is smaller, for example between 14 and 18 cm.
- the smaller inner diameter D1 is approximately in the range of 8-12 cm.
- the abrasive sheet 51 or abrasive 50 may project beyond the outer periphery of the edge portions 45, 145, 245 or the abrasive pads 10, 110, 210.
- the abrasive sheet 51 or abrasive 50 may, for example, have a diameter D4.
- the diameter D4 may be, for example, about 0.5-1 cm larger than the diameter D3. It is possible that the abrasive sheet 51 or abrasive 50 projecting a few millimeters, for example 2-5 mm, radially outward in front of the sanding pad.
- a sanding pad 310 shown in FIG. 11 essentially corresponds to the sanding pad 10 according to FIGS. 1-3 and has, for example, the backing pad 13 on its side not visible in the drawing. Opposite to this Backing pad 13 is a processing surface 312 of the grinding plate 310 is provided, which is designed for attachment of the abrasive 50.
- the central region 345 is a slight or less abrasive machining of the workpiece surface of the workpiece V as in the edge region 344 when contact pressure P on the support plate 13 not visible in the drawing in the direction of the working surface 312 acts.
- the holding layer provided on the working surface 312 in the form of the holding means 344 comprises, for example, a hook and loop layer 334, which has a fabric 360 with threads or schematically indicated fibers 361, 362.
- the fibers 361, 362 represent, for example, warp and weft of the fabric 360, that is, they are mutually orthogonal, for example.
- a deformation or thermal stress of the holding means 333 or the Velcro layer 334 could be due to the orientation of the fibers 361, 362 uneven deformation occur, the effect of which is prevented or avoided by, for example, slots 363 are provided, extending radially to the Processing surface 312 extend.
- the slots 363 run, for example, from the outer circumference of the working surface 312 to the center axis M of the grinding plate 310.
- circular segments or angular segments of the processing surface are formed, which can move relative to each other when the sanding pad is loaded by the contact pressure P.
- FIG. 12 is intended to schematically illustrate a further measure improving a flatness of a respective sanding disk on the workpiece surface when the sanding pad is loaded by contact pressure P in the direction of the machining surface or workpiece surface.
- a retaining means 433 which comprises an extrusion crotch 434.
- the extrusion cuff 434 is made, for example, from a film 433A, which is processed by means of a processing roller 490 to form an intermediate product 433B comprising hook-and-loop projections 435.
- the Velcro projections 435 are formed for example by corresponding extrusion projections 491 of the roller 490. It can be seen anyway that the starting material 433A, the film, is generally homogeneous over its entire surface area, that is, that the respective Velcro projections 434 are evenly distributed over the entire surface.
- the extrusion block 434 is attached, for example, to a cushion 430 on the basis of an adhesive film 429 or adhered directly. It is furthermore possible for the pad 430 to be foamed directly onto the extrusion film 434 or the adhesion promoter film 429, for example as part of a foaming process FOA.
- a deformation contour 431 can ensure that the pad 430 rests flat against the workpiece surface of the workpiece V when loaded by the contact pressure P (corresponding to the arrow direction of the arrow FOA in FIG. 12)
- the deformation contour 431 includes a notch 431. This notch 431 expediently runs radially in the direction of the central axis M.
- the deformation contour 431, that is to say, for example, a groove could also be at one Holding means may be provided, for example, on the holding means 333 of the grinding plate 310th
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 Of Cylindrical And Plane Surfaces (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015113190.0A DE102015113190A1 (de) | 2015-08-11 | 2015-08-11 | Schleifteller und damit ausgestattete Schleifmaschine |
| PCT/EP2016/067633 WO2017025303A1 (de) | 2015-08-11 | 2016-07-25 | Schleifteller und damit ausgestattete schleifmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3334563A1 true EP3334563A1 (de) | 2018-06-20 |
| EP3334563B1 EP3334563B1 (de) | 2021-09-22 |
Family
ID=56557679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16745437.0A Active EP3334563B1 (de) | 2015-08-11 | 2016-07-25 | Schleifteller und damit ausgestattete schleifmaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3334563B1 (de) |
| CN (1) | CN108136559B (de) |
| DE (2) | DE102015113190A1 (de) |
| WO (1) | WO2017025303A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3812089A1 (de) | 2019-10-23 | 2021-04-28 | Black & Decker Inc. | Stabschleifmaschine |
| DE102020105572A1 (de) * | 2020-03-02 | 2021-09-02 | Festool Gmbh | Schleifteller mit einem Dichtungselement und einer Rippenstruktur sowie Schleifmaschine |
| CN112338820B (zh) * | 2020-10-27 | 2021-10-29 | 湖北鼎汇微电子材料有限公司 | 一种抛光垫及其制备方法、应用 |
| US11867224B2 (en) | 2021-01-27 | 2024-01-09 | Black & Decker Inc. | Locking mechanism for two telescoping poles of a power tool |
| DE102021121566A1 (de) | 2021-08-19 | 2023-02-23 | Festool Gmbh | Tellerwerkzeug |
| CN113649882B (zh) * | 2021-10-20 | 2021-12-14 | 南通铭品机械有限公司 | 一种用于金属板材的平面磨削装置 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE849970C (de) * | 1944-05-03 | 1952-09-18 | Hagen Ag Gottfried | Putzscheibe |
| GB753938A (en) * | 1954-06-18 | 1956-08-01 | Berne Tocci Guilbert | Improvements in or relating to polishing and abrading apparatus |
| US2950584A (en) * | 1958-05-08 | 1960-08-30 | Carpart Corp | Accessory for rotary power driven tools |
| US3315420A (en) * | 1964-11-17 | 1967-04-25 | Atlas Copco Ab | Holder for abrasive disks |
| GB2016324A (en) * | 1977-09-29 | 1979-09-26 | Victor Floor Maintenance Ltd | Floor treating machines |
| FR2448419A1 (fr) * | 1979-02-09 | 1980-09-05 | Peugeot Aciers Et Outillage | Dispositif de support pour disques abrasifs utilises dans une ponceuse circulaire a aspiration de poussieres |
| DE3244917A1 (de) | 1982-12-04 | 1984-06-14 | W. Schlafhorst & Co, 4050 Mönchengladbach | Spulentransportvorrichtung |
| DE3545308A1 (de) * | 1985-12-20 | 1987-06-25 | Feldmuehle Ag | Schleifscheibe mit daempfung |
| US4910826A (en) * | 1988-09-29 | 1990-03-27 | Americo | Surface working pad assembly |
| US6142858A (en) * | 1997-11-10 | 2000-11-07 | 3M Innovative Properties Company | Backup pad for abrasive articles |
| DE29913046U1 (de) * | 1999-07-30 | 2000-03-02 | EFCO Maschinenbau GmbH & Co. KG, 52353 Düren | Schleifscheibe |
| KR100857642B1 (ko) * | 2001-04-09 | 2008-09-08 | 니혼 미크로 코팅 가부시끼 가이샤 | 접촉자 선단 및 측면 클리닝 용구 |
| DE10131326A1 (de) * | 2001-06-28 | 2003-01-16 | Bosch Gmbh Robert | Einsatzwerkzeug für Schleifmaschinen |
| DE10144274A1 (de) | 2001-09-08 | 2003-03-27 | Bosch Gmbh Robert | Schleifplatte |
| DE10354653A1 (de) * | 2003-11-22 | 2005-06-16 | Robert Bosch Gmbh | Schleifteller für eine Handschleifmaschine |
| US20060053576A1 (en) * | 2004-09-10 | 2006-03-16 | Mclain Scott S | Buffing pad with graded flexibility and replaceable working face |
| JP2008528300A (ja) * | 2005-01-21 | 2008-07-31 | 株式会社荏原製作所 | 基板研磨方法及び装置 |
| JP2007090517A (ja) * | 2005-09-05 | 2007-04-12 | Sanwa Kenma Kogyo Kk | 回転工具および塗膜除去方法 |
| DE102007010195B3 (de) * | 2007-03-02 | 2008-04-10 | Festool Gmbh | Motorgetriebenes Schleifgerät |
| DE102007059616A1 (de) * | 2007-12-11 | 2009-06-18 | Festool Gmbh | Schleifteller und Schleifmittel |
| JP2010264567A (ja) * | 2009-05-15 | 2010-11-25 | Mitsubishi Materials Corp | パッドコンディショナ |
| JP5422262B2 (ja) * | 2009-06-01 | 2014-02-19 | ニッタ・ハース株式会社 | 研磨パッドのコンディショナー |
| EP2758210B1 (de) * | 2011-09-20 | 2016-05-18 | Robert Bosch GmbH | Haltekörper für flexibles schleifmittel, schleifsystem und schleifgerät |
| DE102012010828A1 (de) * | 2012-06-01 | 2013-12-05 | Festool Group Gmbh & Co. Kg | System mit einer Hand-Werkzeugmaschine und einem Teller-Werkzeug |
| DE102013213272A1 (de) * | 2013-07-05 | 2015-01-08 | Flex-Elektrowerkzeuge Gmbh | Werkzeugaufnahme und handgehaltene Schleifmaschine |
-
2015
- 2015-08-11 DE DE102015113190.0A patent/DE102015113190A1/de not_active Withdrawn
-
2016
- 2016-07-25 WO PCT/EP2016/067633 patent/WO2017025303A1/de not_active Ceased
- 2016-07-25 DE DE112016002810.5T patent/DE112016002810A5/de active Pending
- 2016-07-25 CN CN201680045245.3A patent/CN108136559B/zh active Active
- 2016-07-25 EP EP16745437.0A patent/EP3334563B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108136559B (zh) | 2021-05-18 |
| EP3334563B1 (de) | 2021-09-22 |
| WO2017025303A1 (de) | 2017-02-16 |
| CN108136559A (zh) | 2018-06-08 |
| DE112016002810A5 (de) | 2018-03-08 |
| DE102015113190A1 (de) | 2017-02-16 |
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