EP2758210B1 - Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse - Google Patents

Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse Download PDF

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Publication number
EP2758210B1
EP2758210B1 EP12740373.1A EP12740373A EP2758210B1 EP 2758210 B1 EP2758210 B1 EP 2758210B1 EP 12740373 A EP12740373 A EP 12740373A EP 2758210 B1 EP2758210 B1 EP 2758210B1
Authority
EP
European Patent Office
Prior art keywords
fastening
support
air
dust
retaining body
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.)
Active
Application number
EP12740373.1A
Other languages
German (de)
English (en)
Other versions
EP2758210A1 (fr
Inventor
Stefan Christen
Juerg Schnyder
Thomas Mathys
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2758210A1 publication Critical patent/EP2758210A1/fr
Application granted granted Critical
Publication of EP2758210B1 publication Critical patent/EP2758210B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • 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
    • 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
    • B24D9/10—Circular back-plates for carrying flexible material with suction means for securing the material

Definitions

  • the invention relates to a holder body for flexible abrasive, a grinding system and a grinding device, in particular a hand grinder according to the preamble of the independent claims.
  • Generic holding body in the form of grinding plates are, for example, in DE 20 2009 000 880 and EP 0 781 629 A1 described.
  • These sanding pads have a soft support body, which may comprise, for example, foam, as well as a Velcro or adhesive layer for bonding with a flexible abrasive.
  • the flexible abrasive may be, for example, a grinding wheel.
  • These known sanding plates have a plurality of bores running in the axial direction, through which air and grinding dust produced during sanding can be sucked off. These holes penetrate both the soft layer and the Velcro or adhesive layer.
  • the holding body according to the invention with the features of claim 1 has the advantage that a sanding dust resulting from the working process can initially pass through the attachment layer substantially unhindered and by the shortest path, since the attachment surface of the attachment layer extends in a direction substantially perpendicular to the attachment surface is substantially air and dust permeable.
  • a "air- and dust-permeable attachment layer" in particular a fastening layer understood which consists at least partially of an air and dust permeable, especially open-pore material and / or at least partially made of a material which by at least one processing step, such as punching, milling and / or drilling, in particular by laser drilling or other method with the material piercing holes and / or channels was made air and dust permeable.
  • an air flow in particular a dust-containing air flow
  • a back pressure is advantageously reduced by the attachment layer.
  • dust particles reach the side of the fastening layer facing away from the grinding process by the shortest route from the side of the fastening layer facing a grinding process.
  • holding body according to the invention may preferably be formed in a truncated cone, in particular, the larger of the base surfaces is designed as a mounting surface.
  • the fastening means of the holding body according to the invention are designed as mechanical fastening means for fastening a flexible abrasive, in particular as loops and / or hooks protruding from the fastening surface.
  • the attachment layer contains an open-pored material.
  • the attachment layer can also consist of the open-pored material.
  • open-pored is understood as meaning in particular a material which has pores, channels, openings and / or recesses along at least one spatial direction, in particular perpendicular to the fastening surface, so that a dust-laden air stream can pass through the material.
  • the grinding dust generated during a grinding process has a typical size distribution of the abrasive particles, so that preferably the minimum passage cross-sections of the channels, openings and / or recesses or porosity of the pores are defined by the largest typically occurring abrasive particles.
  • the attachment layer of a particularly preferred embodiment of the holding body according to the invention contains a textile material or consists thereof.
  • the textile material has loops and / or hooks and / or mushroom heads as fastening means, which are particularly suitable for the formation of a known Velcro system.
  • a dense from its material structure, in particular dust and air impermeable material according to the invention as a fastening layer by suitable perforation, perforations and / or perforations in regular or irregular patterns are advantageously used.
  • suitable perforations, perforations and / or perforations in regular or irregular patterns can be advantageously combined with textile materials or material blends.
  • a preferred development of the holding body according to the invention is achieved when the attachment layer covers the attachment surface almost completely, preferably completely.
  • the inventive design of the holding body is achieved in that the support body has a dust chamber, which is provided in a region adjacent to the support surface area, wherein the dust chamber from the viewpoint of the support surface has a honeycomb structure, with channels, grooves and / or grooves for guiding is traversed by an air flow.
  • a dust chamber which is provided in a region adjacent to the support surface area, wherein the dust chamber from the viewpoint of the support surface has a honeycomb structure, with channels, grooves and / or grooves for guiding is traversed by an air flow.
  • an optionally constructive pressure barrier obstructing the dusty air flow is advantageously reduced after passing through the fastening layer according to the invention.
  • the dust chamber makes it possible here to realize the deflection of the air flow with the lowest possible losses.
  • at least one dust chamber can also be provided in the inner support body, which has similar effects. Preferably, therefore, the deflection of the air flow substantially in the dust chamber.
  • the support body of the holding body according to the invention has at least one exhaust air hole which connects the dust space with a surface lying opposite the support surface and is permeable to dust and can be sucked out of the dust space by the air, then the holding body according to the invention can be attached to a grinding machine with a suction device an internal or even an external intended suction, apply.
  • the support body has at least one supply air bore, via which an air flow can be conducted into an area in front of the attachment layer of the support body.
  • the Zu Kunststoffbohrung introduces fresh air into a central region of the holding body, from which the fresh air is supplied to a processing area.
  • the honeycomb-like structure of the dust chamber is substantially protruding from the rest of the support body Support projections formed which at least partially protrude into the support surface, so that the protruding into the support surfaces parts of the support projections form parts of the support surface, wherein the attachment layer is preferably connected to these parts of the support surfaces, in particular glued and / or welded.
  • the attachment layer is preferably connected to these parts of the support surfaces, in particular glued and / or welded.
  • connection surface substantially opposite the support surface, wherein the connection surface has a smaller surface area, in particular a smaller outer diameter than the support surface and wherein at least one suction opening is provided in the connection surface.
  • the support body has at least one support body and a cover plate, wherein the support body extends between the support surface and the cover plate and is permeable to air and dust, in particular consists of an air- and dust-permeable material, and wherein the cover plate substantially forms the connection surface can the support body are advantageously protected against mechanical damage.
  • the cover plate allows the integration of a robust interface for connecting the holding body according to the invention with a grinding machine.
  • the interface can be designed in particular as a screw, latching, clips and / or plug connection.
  • tool interfaces such as, for example, for rotary oscillation tools, which may advantageously be provided in or on the cover plate, are known to the person skilled in the art.
  • the support body has a protective body, preferably radially enclosed by this, wherein a support surface facing the radial outer contour is substantially equal to an outer contour of the support surface, preferably with this almost identical.
  • the protective body advantageously secures the support body in its circumferential surface against mechanical damage.
  • the protective body may be provided to form a supporting body in its circumferential surface air and dustproof, in particular a support body, preferably a support body air-tight and dust-tight seal an open-pored material in its peripheral surface, so that only over radial faces an air flow can pass through the holder body.
  • the protective body can have an advantageous contact surface lying in a plane of the support surface, wherein the fastening layer is connected, in particular adhesively bonded and / or welded, at least on the contact surface, so that in particular the fastening layer is preferably peripherally connected to the protective body.
  • the izof kaue is preferably formed as a flat annular surface or flat, ring-like surface.
  • An abrasive suitable for the invention comprises a working layer substantially covering a working layer, an air- and dust-permeable carrier layer, and a connecting layer having connecting means for securing the abrasive to the holding body and providing a connecting surface substantially remote from the working surface is formed so that the connecting surface in a direction substantially perpendicular to the connecting surface extending direction is substantially permeable to air and dust.
  • a "flexible abrasive” is understood in particular to mean a grinding wheel which, in a loose state not connected to the holding body, can be bent, buckled or otherwise deformed at least in a direction perpendicular to the work surface.
  • a "working layer” is understood as meaning, in particular, a layer having at least one abrasive medium, such as, for example, abrasive grains of known grinding media with a given abrasive grain distribution.
  • the carrier layer may have an open-pore, in particular air and dust-permeable paper, textile foam and / or elastomer component, in particular consist thereof.
  • the connecting layer may preferably comprise a textile and / or otherwise open-pored material, in particular consist thereof, which has suitable connection means for the connection to the fastening means of the holding body according to the invention.
  • the invention in another aspect, relates to a grinding system comprising a holding body according to the invention and at least one abrasive, which is fastened to the mounting surface of the holding body.
  • the abrasive is included preferably designed at least partially air and dust permeable.
  • perforations in particular openings or perforations in the abrasive material may be provided which are distributed over a working surface of the abrasive.
  • the invention relates to a grinding machine, in particular a hand grinder comprising at least one holding body according to the invention and a drive unit for driving the at least one holding body.
  • a preferred grinding machine further comprises a suction device, which provides a suction air flow, which flows from the attachment surface over the holding body according to the invention in the direction of the suction device.
  • the suction device can be designed as a pipe system for connecting an external suction unit and / or as actively driven by the drive unit of the grinding machine suction device.
  • FIG. 1 is an example of a grinding machine 10 with a holding body according to the prior art fragmentary and partially cut a hand-held eccentric grinder, hereinafter referred to as eccentric grinder, shown for performing grinding in side view.
  • the eccentric grinder has a housing 11, which merges in the viewing direction to the left in a handle 12, on the underside of a switch button 13 for switching on and off of a recorded inside the housing 11 electric motor 14 of a drive unit 11a is arranged.
  • On the output shaft 15 of the electric motor 14 is rotatably seated an impeller 16 of a suction fan, which is sucked with the resulting grinding work on the surface of a workpiece grinding dust and transported via a discharge port 17 in a dust collecting container.
  • an eccentric recess 18 is provided, in which a protruding on the underside of the housing 11 driver 19 is immersed, which is supported on two roller bearings 20, 21 on the inner wall of the eccentric recess 18.
  • the rolling bearings 20, 21 takes place, depending on the bearing friction, the rotational drive of the driver 19.
  • Rolling 20, 21 and driver 19 are held axially immovable in the eccentric recess 18.
  • a flat support surface 191 is formed, to which a designed as a sanding pad 22 holding body 30 according to the prior art with a formed on its upper surface contact surface 23 can be attached.
  • a disk brake 25 is secured against rotation against rotation, which hangs on the top of the sanding pad 22.
  • the sanding pad 22 consists of two components, a support plate 26 made of a hard plastic and attached to the underside of the support plate 2 6 sanding pad 27.
  • the contact surface 23 of the sanding pad 22 is formed centrally on the support plate 26.
  • a support surface 271 is formed for a not shown abrasive sheet, which carries a Velcro covering 28 for attaching a velor back bearing sanding sheet.
  • Fig. 2 shows a designed as a sanding pad 220 holding body 300.
  • the holding body 300 is formed circular disk-shaped. Fig. 2 does not fall under the scope of the claims.
  • the holding body 300 comprises a preferably substantially circular disk-shaped supporting body 301 and a fixing layer 302, which is arranged on a substantially flat, preferably flat supporting surface 303 of the supporting body 301.
  • the attachment layer 302 is connected to the support body 301 with a holding surface 304, which is preferably arranged substantially opposite the support surface 303.
  • the attachment layer 302 with its holding surface 304 preferably at least partially and / or in sections adhered to the support surface 303 of the support body 301, welded, clamped, wedged, clipped and / or otherwise material and / or positively connected.
  • the holding surface 304 preferably lies opposite a fastening surface 305 of the fastening layer 302, which has fastening means 306 for fastening a flexible abrasive 400.
  • the fasteners 306 are configured to cooperate with a connecting means of the flexible abrasive article 400, not shown here, for providing a releasable connection of the flexible abrasive article 400 to the retainer body 300.
  • the attachment layer 302 is at least partially, but preferably almost completely made of an air- and dust-permeable material 307, so that the attachment layer 302 is substantially permeable to air and dust, in particular in a direction 308 extending substantially perpendicular to the attachment surface 305.
  • the attachment layer 302 consists in a particularly preferred embodiment of an air- and dust-permeable - preferably textile - Velcro material 309th
  • the support body 301 is in the embodiment according to Fig. 2 At least the support body 311 is formed permeable to air and dust, preferably the support body 311 is at least partially, preferably almost completely made of an air- and dust-permeable material 312.
  • the air- and dust-permeable material 312 can in particular a foam or another, open-pored material.
  • the protective body 310 preferably surrounds the support body 311 substantially annularly, wherein "annularly enclosing" means in particular that the support body 311 along its peripheral line or its enveloping surface 311a is almost completely, preferably completely enclosed or enclosed by the protective body 310, in particular radially is.
  • a radial outer contour of the protective body 310 facing the support surface 303 preferably is substantially equal to an outer contour of the support surface 303, preferably it is almost identical to this.
  • the protective body 310 is made of a material 313 that is more air and dustproof compared to the air and dust permeable material 312, and more preferably of an air and dustproof material 313 '.
  • the material 313, 313 ' is preferably also stronger, in particular stiffer than the material 312, whereby the air and dust permeable material 312 of the support body 311 better against mechanical damage when using the holding body 300 after Fig. 2 can be protected.
  • the protective body 310 furthermore has a contact surface 314 lying substantially in one plane of the support surface 303.
  • the attachment layer 302 is connected to the protective body 310 at least on or on the abutment surface 314, in particular adhesively bonded and / or welded.
  • the retaining surface 304 of the attachment layer 302 is in the preferred Design according to Fig. 2 at least almost completely, preferably completely connected to the contact surface 314, in particular adhesively bonded and / or welded.
  • a preferred connection surface 315 of the support body 301 opposite the support surface 303 of the support body 301 has a smaller surface area compared to the support surface 303, in particular a smaller outer diameter.
  • the connection surface 315 is almost completely, preferably completely covered by a cover plate 316.
  • the cover plate 315 extends radially up to a second contact surface 317 of the protective body 310 which is substantially opposite the contact surface 314, wherein the cover plate 316 covers the contact surface 317 radially at least partially, preferably almost completely.
  • the cover plate 316 is connected in the region of this overlap with the protective body 310, in particular glued and / or welded.
  • the cover plate 316 By the connection of the cover plate 316 with the protective body 310, in particular an advantageous guidance of a suction air flow 31 through the holding body 300 can be achieved.
  • the cover plate 316 according to Fig. 2 at least two, preferably radially equidistant exhaust air holes 318, which - in an operation of the holding body 300 on a suitable grinding machine - a passage of Saugluftstroms 31 through the cover plate 316 substantially in the axial direction, ie substantially parallel to the direction 308 allow.
  • radially equidistant is meant in particular that the exhaust holes 318 in almost the same, preferably the same radial distance about a movement center 319 - for example, a rotation axis 319 a - of the holding body 300 are arranged. However, it may also be advantageous that only one or three, four or more exhaust holes 318 are provided. In particular, it may also be advantageous if the exhaust air hole 318 are not radially equidistant distributed over the cover plate 316.
  • a preferred cover plate 316 consists of a harder, more robust material than the support body 301 and in particular the support body 311, wherein the cover plate 316 preferably made of a plastic, such as at least one thermoset, thermoplastics and / or fiber reinforced plastic, and / or a Metal, in particular light metal or a light metal alloy.
  • a plastic such as at least one thermoset, thermoplastics and / or fiber reinforced plastic, and / or a Metal, in particular light metal or a light metal alloy.
  • a fastening device 320 is arranged, via which the holding body 300 can be connected to a grinding machine, not shown here.
  • the fastening device 320 comprises in this example a threaded pin 320a and a retaining plate 320b, with which the threaded pin 320a is fixedly connected and which is itself connected to the cover plate 316 in a material, force and / or form-fitting manner.
  • the holding plate 320b is connected to the cover plate 316 via rivet joints 320c.
  • alternative or complementary fastening methods are known, which can also be used here as advantageous.
  • the impeller 16 If a holding body 300 after the example of Fig. 2 with a grinder 10, as they are made, among others Fig. 1 is known, used and taken after preparation of a suitable abrasive 400 in operation, the impeller 16 generates a suction air 31, the dust laden with abrasive dust through the at least partially air and dust permeable abrasive 400 and the air and dust permeable attachment layer 302 of the holding body 300th sucked into the support body 301.
  • the suction air flow 31 initially runs essentially parallel to the direction 308, ie almost perpendicularly through the attachment surface 305, the attachment layer 302 and the support surface 301.
  • the suction air flow 31 After penetration of the suction air flow 31 into the support body 301, in particular into the support body 311, the suction air flow undergoes a deflection in a transverse direction, ie a deflection with at least one directional component perpendicular to the direction 308 Fig. 2 the suction air stream 31 is bundled in its way through the support body 311 in the direction of the exhaust holes 318 in the cover plate 316 back so that the suction air stream 31 again almost parallel to the direction 308 passes through the exhaust ports 318. Now, the suction air flow 31 continues its already known path through the grinding machine 10.
  • the suction air flow 31 experiences a much gentler deflection during its passage through the holding body 300, ie a deflection with larger radii of curvature than in holding bodies 30 according to the prior art, so that the holding body 300 advantageously contributes to less vortex formation and increased suction power.
  • the holding body 300 allows the suction of a suction as evenly as possible over the Distribute mounting surface 305, so that the extraction of sanding dust can be done as fully as possible.
  • Fig. 3 shows a further development of a holding body 300 according to the invention, as it Fig. 2 already known. In the following, only the closer to the deviations will be discussed. Features that are designed to be equivalent to the example described above are denoted by identical reference numerals.
  • the holding body 300 after Fig. 3 includes a support body 301 with a mounting layer 302 similar to the embodiment of FIG Fig. 2 ,
  • the support body 301 consists of a substantially air and dust-proof material and has at least one, preferably two or more radially distributed over the disc-shaped cross-sectional surface of the support body 301 Saugluftbohronne 330 to provide an air and dust permeability.
  • the Saugluftbohrened 330 connect the terminal surface 315 with the area of the support surface 303.
  • a cover plate 316 is provided, which has exhaust air bores 318.
  • the support body 301 in a region 331 adjoining the support surface 303, there is a dust space 332, into which the suction air bores 330 in particular open.
  • the dust space 332 preferably extends substantially parallel to the support surface 303.
  • the dust space 332 is structured in a knobbed and / or honeycomb-like manner.
  • Fig. 4 shows a plan view of the support surface 303 and the dust chamber 332 of a support body 301 according to the invention according to the example of Fig. 3 , wherein the dust chamber 332 is knob-like structured by projecting from the rest of the support body support projections 333, which at least partially protrude into the support surface.
  • the protruding into the support surface 303 parts of the support projections 333 preferably form parts of the support surface 303.
  • the dust chamber 332 forms in this example still a coherent space itself.
  • Analogous to the knob-like support projections 332 of the dust chamber 332 is also honeycombed segmented by channels, grooves and / or wall pieces, wherein Interruptions in the channels, grooves and / or wall pieces ensure that the dust space 332 extends substantially as an open space over a contiguous region of the support surface 303.
  • the dust chamber 332 in the support body 301 of the holding body 300 after Fig. 3 is covered in the direction of the support surface 303 by the attachment layer 302 according to the first embodiment or closed air and dust permeable.
  • the attachment layer 302 is connected to the projecting into the support surface 303 parts support projections 333, channels, grooves and / or wall pieces, in particular glued and / or welded.
  • the fastening device 320 is designed as a fastening screw 321, which is guided through a central bore 322 in the holding body 300 and a feedthrough bore 323 in the cover plate 316 and with which the holding body 300 according to the invention can be connected to a grinding machine 10.
  • the impeller 16 generates a suction air stream 31, the laden with grinding dust air through the at least partially air and dust-permeable abrasive 400 and the air and dust-permeable attachment layer 302 of the holder body according to the invention 300 in the dust chamber 332 of the support body 301 sucks.
  • a deflection of the suction air flow 31 takes place analogously to the example Fig. 2 , wherein in the embodiment according to Fig.
  • the open design of the dust chamber 332 also ensures an effective deflection of dust particles with larger dimensions towards the Saugluftbohrungen, which effectively prevents clogging of the holding body 300 according to the invention.
  • Fig. 3 moreover shows a further development of the holding body 300 according to the invention as dashed drawing portions.
  • one or more fresh air lines 334 are provided in the support body 301, which an air flow 335 via not shown Zu Kunststoffö réelleen from a holding body 300 enclosing Surround by the support body 301 in the vicinity of a processing zone 336 conduct.
  • fresh air bores 337 open into the central bore 322, so that the air flow 335 can at least partially overflow a central region of the processing zone 336.
  • Fig. 5 shows an alternative or additional development of a holding body 300 according to the invention, as it Fig. 2 and or Fig. 3 already known. In the following, only the closer to the deviations will be discussed. Features that are designed to be equivalent to the example described above are denoted by identical reference numerals.
  • Analogous to the example from Fig. 3 is the support body 301 of a substantially air and dust-proof material and has to provide an air and dust permeability at least one, preferably two or more radially distributed over the disc-shaped cross-sectional surface of the support body 301 Saugluftbohrept 330.
  • the support body 301 consists of at least a first support body part 301A and a second support body part 301B, wherein the at least two support body parts 301A, 301B are preferably fixedly connected to each other and thus form the support body 301.
  • a connection of the at least two support body parts 301A, 301B can be effected in particular by gluing, welding or another cohesive connection and / or by a positive and / or non-positive connection, such as, for example, screws, clamps or latches.
  • the first support body part 301A in this case has the connection surface 315 and, on the other hand, provides an inner dust chamber 332 via a recess 338 facing the second support body part 301B.
  • the dust space 332 is thereby completed after the connection of the second support body part 301B with the first support body part 301A through an interface 339 of the second support body part 301B - in the sense of "largely separated from the rest of the environment".
  • the recess 338 may also be provided in the second support body part 301B and the interface 339 in the first support body part 301A. It is also conceivable that a recess 338 is provided in each of the support body parts 301A, 301B, which form the dust space 332 after the joining of the two support body parts 301A, 301B.
  • the second support body part 301B furthermore has a plurality of dust air holes 340, which connect the air- and dust-permeable attachment layer 302, which is arranged on the support surface 303 opposite the boundary surface 339, to the interface 339 so as to be permeable to air and dust.
  • a holding body 300 after Fig. 5 the advantageous deflection and / or bundling of the suction air flow 31 substantially dust chamber 332 takes place. Otherwise, the holding body 300 corresponds to Fig. 5 in its effect the examples described above, to the description of which reference is made.
  • the second support body part 301B wholly or partly from the air and dust-permeable material 312 according to the example according to Fig. 2 exists, so that preferably can be dispensed with the dusty air holes 340, which may advantageously favor a more uniform surface distribution of the Saugluftstroms 31 on the mounting surface 305.
  • a particularly advantageous variant can result, for example, from the fact that a support body 311 as in the example according to Fig. 2 known from a first support member 311A and a second support member 311B similar to the structure of the support body 301 after Fig. 5 in particular, at least one, preferably both support body parts 311A, 311B consist of the air- and dust-permeable material 312.
  • the support body parts 311A, 311B become similar to the embodiment by a protective body 310 Fig. 2 enclosed.
  • at least one recess 338 for forming a dust chamber 332 similar to the embodiment according to Fig. 5 be provided in at least one of the support body parts 311A, 311B.
  • the Figures 6a and 6b show in addition an abrasive 400, in particular flexible abrasive 400, which further favors the effect of the holding body 300 according to the invention.
  • the abrasive 400 comprises a, a working surface 401 substantially covering working layer 402, an air and dust-permeable carrier layer 403 and a connecting layer 405 having connecting means 404 cooperating with the fastening means 306 of the holder body 300 for fastening the abrasive 400 on the holding body 300.
  • the connecting layer 405 thereby provides a connecting surface 406 which is substantially remote from the working surface 401.
  • the connection layer 405 is formed so that the connection surface 406 is substantially permeable to air and dust in a direction substantially perpendicular to the connection surface 406.
  • the impeller 16 generates a suction air stream 31, the air laden with grinding dust along the direction 308 of the working surface 401, through the air and dust-permeable carrier layer 403 sucks into the air and dust-permeable connection view 405 and from there into the air and dust-permeable attachment layer 302 of the holding body 300 according to the invention in the support body 301 sucks.
  • the suction air flow 31 initially runs essentially parallel to the direction 308, ie almost perpendicularly through the carrier layer 403, the common layer of connecting layer 405 and fastening layer 302 and the support surface 301.
  • the suction air flow 31 follows the above-described paths, to the description of which reference is made.
  • the abrasive 400 according to Fig. 6a, 6b further comprises an optional, central bore 407, which in particular with a holding body 300, which has at least one opening into the central bore 322 fresh air line 334, may be advantageous.
  • the abrasive 400 according to the invention can also be advantageously used on a holding body 30 according to the prior art, since here, too, relative to the dust extraction openings 29 in the holding body 30 can advantageously remain unnoticed when applying an abrasive 400.
  • the abrasive 400 merely has to have a connecting layer 405 with connecting means 404, which can cooperate with fastening means of the holding body 30 in such a way that the abrasive 400 adheres to the fastening surface of the holding body 30, advantageously removably adheres.
  • an already known flexible abrasive 400 ' which has a plurality of over the work surface 401' distributed, the abrasive 400 ' piercing suction holes 408 ', are advantageously used on a holding body 300 according to the invention.
  • An alignment of the suction holes 408 'relative to the mounting surface 305 is advantageously without effect on a suction when attaching such an abrasive 400'.
  • the abrasive 400 ' only has to have a connecting layer 405' with connecting means 404 ', which can cooperate with the fastening means 306 of the holding body 300 according to the invention such that the abrasive 400' adheres to the mounting surface 305, advantageously releasably adheres.
  • a number of further grinding machines with suction devices are known to the person skilled in the art, both with substantially circular holding body 300 - for example orbital sander and polishing machines - and those with polygonal, in particular Have substantially triangular, rectangular or trapezoidal holding body 300a.
  • the person skilled in the art will be able to transfer the disclosed emptiness with ease to a grinding machine with polygonal, in particular substantially triangular, rectangular or trapezoidal holding body 300a.
  • An advantageous, inventive deflection of the air flow through the holding body 300a can also be achieved by simple modification of the holding body geometry for these holding bodies 300a, without having to change parts of the described embodiments that are essential to the invention. Such holding body 300a should therefore be explicitly included in the application.

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

Claims (16)

  1. Corps de retenue (300, 300a) pour un produit abrasif (400), notamment un disque abrasif (220), comprenant une couche de fixation (302) avec une surface de fixation (305) comportant des moyens de fixation (306) pour la fixation d'un produit abrasif flexible (400) ainsi que corps d'appui (301) avec une surface d'appui (303) soutenant une surface de retenue (304), notamment opposée à la surface de fixation (305), de la couche de fixation (302), ledit corps étant notamment relié à ladite surface, le corps d'appui (301) étant perméable à l'air et à la poussière, notamment réalisé à partir d'une matière perméable à l'air et à la poussière (312), la couche de fixation (302) étant réalisée de telle sorte que la surface de fixation (305) est pour l'essentiel perméable à l'air et à la poussière dans une direction (308) s'étendant pour l'essentiel perpendiculairement à la surface de fixation (305), de sorte qu'un écoulement d'air (31) peut notamment entrer depuis la surface de fixation (305), pour l'essentiel perpendiculairement à la surface de fixation (305), à travers la couche de fixation (302), caractérisé en ce que le corps d'appui (301) comporte une chambre à poussière (332, 338) prévue de façon préférée dans une zone (331) connexe à la surface d'appui (303), la chambre à poussière (332) comportant, vue depuis la surface d'appui (303), une structuration de type à boucles et/ou à alvéoles sillonnée de canaux, encoches et/ou rainures permettant de guider un écoulement d'air.
  2. Corps de retenue (300, 300a) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un écoulement d'air (31) s'étendant pour l'essentiel perpendiculairement à la surface de fixation (305), notamment un écoulement d'air poussiéreux, connaît, après traversée de la couche de fixation (302), au moins une déviation partielle dans un écoulement transversal traversant le corps d'appui (301) s'étendant, vu depuis le produit abrasif (400), pour l'essentiel derrière la couche de fixation (302).
  3. Corps de retenue (300, 300a) selon la revendication 1 ou 2, caractérisé en ce que les moyens de fixation (306) sont réalisés sous la forme de moyens de fixation mécaniques pour la fixation d'un produit abrasif flexible (400), prenant notamment la forme de boucles et/ou de crochets saillant hors de la surface de fixation (305).
  4. Corps de retenue (300, 300a) selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche de fixation (302) contient une matière (312) à pores ouverts ou se compose de celle-ci.
  5. Corps de retenue (300, 300a) selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche de fixation (302) contient une matière textile (312) ou se compose de celle-ci, notamment une matière textile (312) comportant des boucles et/ou des crochets et/ou des têtes de champignon.
  6. Corps de retenue (300, 300a) selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche de fixation (302) recouvre presque entièrement la surface de fixation (305).
  7. Corps de retenue (300, 300a) selon l'une quelconque des revendications 2 à 6, caractérisé en ce que la déviation de l'écoulement d'air se produit pour l'essentiel dans la chambre à poussière (332, 338).
  8. Corps de retenue (300, 300a) selon la revendication 6 ou 7, caractérisé en ce que le corps d'appui (301) comporte au moins un alésage d'air aspiré (330) reliant, de façon perméable à l'air et à la poussière, la chambre à poussière (332) à une surface opposée à la surface d'appui (303) et pouvant être aspiré par l'air de la chambre à poussière.
  9. Corps de retenue (300, 300a) selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le corps d'appui (301) comporte au moins une conduite d'air frais (334) via lequel un écoulement d'air peut être conduit dans une zone située devant la couche de fixation (302) du corps de retenue (300, 300a).
  10. Corps de retenue (300, 300a) selon l'une quelconque des revendications 6 à 9, caractérisé en ce que la structure de type à boucles et/ou alvéoles de la chambre à poussière (332) est pour l'essentiel formée à travers les saillies d'appui (333) saillant à travers le corps d'appui (301) restant, lesdites saillies saillant au moins en partie jusque dans la surface d'appui (303), de sorte que les parties, saillant dans les surfaces d'appui (303), des saillies d'appui (333) forment les parties de la surface d'appui (303), la couche de fixation (302) étant de préférence reliée à ces parties des surfaces d'appui (303), notamment collée et/ou soudée.
  11. Corps de retenue (300, 300a) selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps d'appui (301) comporte une surface de jonction (315) pour l'essentiel opposée à la surface d'appui (303), la surface de jonction (315) comportant un contenu de surface plus réduit, notamment un diamètre extérieur plus limité, que la surface d'appui (303) et au moins une ouverture d'aspiration (318) étant de préférence prévue dans la surface de jonction (315).
  12. Corps de retenue (300, 300a) selon la revendication 11, caractérisé en ce que le corps d'appui (301) comporte au moins un corps porteur (311) et une plaque de recouvrement (316), le corps porteur (311) s'étendant entre la surface d'appui (303) et la plaque de recouvrement (316) et est perméable à l'air et à la poussière et se composant notamment d'une matière perméable à l'air et à la poussière (312) et la plaque de recouvrement (316) revêtant et/ou formant pour l'essentiel la surface de jonction (316).
  13. Corps de retenue (300, 300a) selon la revendication 11 ou 12, caractérisé en ce que le corps d'appui (301) comporte un corps de protection (310), est de préférence entouré par celui-ci dans le plan radial, sachant qu'un contour extérieur radial, orienté vers la surface d'appui (303), du corps de protection (310) est pour l'essentiel égal à un contour extérieur de la surface d'appui (303), de préférence quasi identique à lui.
  14. Corps de retenue (300, 300a) selon la revendication 13, caractérisé en ce que le corps de protection (310) comporte une surface d'installation (317) reposant dans un plan de la surface d'appui (303), la couche de fixation (302) étant reliée au corps de protection (310) au moins au niveau de la surface d'installation (317), notamment collée et/ou soudée.
  15. Système abrasif comprenant au moins un corps de retenue (300, 300a) pour un produit abrasif flexible, notamment un disque abrasif (220), selon l'une quelconque des revendications 1 à 14 et au moins un produit abrasif (400, 400'), de préférence un produit abrasif au moins partiellement perméable à l'air et à la poussière pouvant être fixé au niveau de la surface de fixation (305) du corps de retenue (300).
  16. Machine abrasive (10), notamment meuleuse manuelle, comprenant au moins un corps de retenue (300, 300a) selon l'une quelconque des revendications 1 à 14 et une unité d'entraînement en entrée (11a) servant à l'entraînement de l'au moins un corps de retenue (300, 300a).
EP12740373.1A 2011-09-20 2012-07-30 Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse Active EP2758210B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083032 2011-09-20
PCT/EP2012/064874 WO2013041277A1 (fr) 2011-09-20 2012-07-30 Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse

Publications (2)

Publication Number Publication Date
EP2758210A1 EP2758210A1 (fr) 2014-07-30
EP2758210B1 true EP2758210B1 (fr) 2016-05-18

Family

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Application Number Title Priority Date Filing Date
EP12740373.1A Active EP2758210B1 (fr) 2011-09-20 2012-07-30 Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse

Country Status (5)

Country Link
US (1) US10029349B2 (fr)
EP (1) EP2758210B1 (fr)
CN (1) CN103813884B (fr)
DE (1) DE102012216556A1 (fr)
WO (1) WO2013041277A1 (fr)

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DE102013213272A1 (de) * 2013-07-05 2015-01-08 Flex-Elektrowerkzeuge Gmbh Werkzeugaufnahme und handgehaltene Schleifmaschine
US10076819B2 (en) * 2014-05-15 2018-09-18 Barry ULRICH Sandpaper sheet for use with tools configured for dust extraction
USD785339S1 (en) * 2014-10-23 2017-05-02 Griot's Garage, Inc. Hand applicator buffing pad
US10124463B2 (en) * 2015-02-03 2018-11-13 Johnny Blox, Llc Sanding pad
DE102015113190A1 (de) * 2015-08-11 2017-02-16 Festool Gmbh Schleifteller und damit ausgestattete Schleifmaschine
TWI647070B (zh) * 2017-02-20 2019-01-11 詠巨科技有限公司 組合式修整器及其製造方法
DE102020207733A1 (de) * 2019-09-04 2021-03-04 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifwerkzeugvorrichtung, Schleifmittel und Schleifwerkzeugsystem
CN118143837B (zh) * 2024-05-11 2024-07-05 四川航空股份有限公司 一种用于飞机零件腐蚀纹的维修装置

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US3395417A (en) * 1966-04-05 1968-08-06 Formax Mfg Corp Backup pad assembly
DE29520566U1 (de) 1995-12-29 1996-02-22 Jöst, Peter, 69518 Abtsteinach Direkt oder indirekt mit einer Maschine oder einem manuell betreibbaren Schleifmittelhalter adaptierbarer Schleifkörper sowie ein hierfür geeigneter Adapter
US6059644A (en) * 1998-11-18 2000-05-09 3M Innovative Properties Company Back-up pad for abrasive articles and method of making
AUPP926799A0 (en) * 1999-03-17 1999-04-15 Mcnair, Susan Gail Surface finishing machine
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GB0500469D0 (en) * 2005-01-11 2005-02-16 Positec Group Ltd Tool
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DE102010003616A1 (de) * 2010-04-01 2011-10-06 Robert Bosch Gmbh Haltekörper für flexibles Schleifmittel und Schleifsystem

Also Published As

Publication number Publication date
WO2013041277A1 (fr) 2013-03-28
CN103813884B (zh) 2017-03-15
DE102012216556A1 (de) 2013-03-21
US10029349B2 (en) 2018-07-24
CN103813884A (zh) 2014-05-21
EP2758210A1 (fr) 2014-07-30
US20150056898A1 (en) 2015-02-26

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