Classifications

• • 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
• • 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
  • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
  • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
  • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
  • B24D13/04—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising a plurality of flaps or strips arranged around the axis

Definitions

• the present invention relates to a grinding device according to the preamble of claim 1. Such a device is described in US-A-4,571,893.
• the surfaces of plate or strip-shaped workpieces are ground, which are essentially flat.
• the grinding of profiled surfaces can only be carried out very unsatisfactorily, if at all, with such grinding devices.
• round brushes are used, which can be roller-shaped and on which deformable grinding elements are provided, with which the recesses provided by strong profiles are also provided are grindable.
• the present invention is therefore based on the object of designing a grinding device of the generic type in such a way that its work result is improved and its area of use is enlarged.
• Each grinding element is used for a significantly longer period of time when it passes through a workpiece than can be the case with cylindrical grinding brushes. This results in a much better grinding result than this.
• the service life of the grinding belt is considerably longer than that of a circular grinding brush, in which the grinding elements are much more worn out.
• the deformable grinding elements are held on the carrier belt in a positive and / or non-positive manner.
• receptacles can be provided, for example in the form of undercut grooves, which are made directly in the carrier tape or in carrier strips, which in turn are glued, welded or vulcanized to the carrier tape, the recordings preferably extending over the entire width of the carrier tape.
• the carrier tape can consist, for example, of a suitable rubber or plastic.
• the carrier tape can consist of a plurality of carrier strips which extend transversely to the direction of rotation, are arranged parallel to one another, are connected to one another and can be pivoted independently of one another in the deflection region and in which the grinding elements are mounted in a positive or non-positive manner.
• the carrier strips are fastened, for example, to two chains or toothed belts which run parallel and at a distance from one another and are guided over pinions or toothed wheels which form the deflection rollers.
• the carrier strips can be dimensioned such that they each hold several grinding elements arranged one behind the other.
• carrier strips which are each independently attached to the carrier belt, i.e. the chain or the toothed belt, it is prevented that the receptacles for the grinding elements deform due to the deflection radius, so that in any case a secure hold of the grinding elements in the Recordings is guaranteed.
• the belts or chains which are arranged in parallel and at a distance from one another, are connected to one another by the carrier strips.
• the width of the carrier belt and thus of the grinding belt as a whole can be chosen as desired and is only dependent on the machine design.
• the definition of the grinding element receptacles makes it easy to replace the grinding elements if they have to be replaced. A complete replacement of the sanding belt, including the carrier belt, is not necessary, which results in recognizable cost advantages.
• the grinding elements consist of a brush strip, the bristles of which are fixed in a bristle carrier which is inserted into the receptacle.
• This brush strip forms the carrier for an abrasive cloth, which is preferably attached to the brush strip in the region of the bristle carrier, for example by gluing.
• the abrasive cloth is separated into a plurality of lamellae lying side by side, which are connected on the side facing the bristle holder, but are freely movable opposite one another, so that each lamella is freely movable, insofar as this is due to the bristles lying behind in the direction of rotation of the abrasive belt of the brush strip is possible.
• These bristles form an elastic abutment through which the lamellae of the abrasive cloth are pressed onto the surface of the workpiece to be machined, the contact pressure being dependent not only on the restoring forces of the bristles but also on their inclination to the workpiece.
• the receptacles can be attached to the carrier tape at a corresponding angle.
• change is also conceivable the distance of the grinding device or the grinding belt to the workpiece to influence the pressing forces of the grinding elements on the workpiece.
• the abrasive elements can also consist of other abrasive bodies, for example plastic bristles with a corundum mixture, abrasive sponges or the like.
• the individual lamellae of the respective grinding line are formed by incisions that run obliquely to the vertical.
• the grinding result is optimized in that the grinding device performs a rotating movement overall. This rotation can be rectified. A back and forth rotation is also conceivable.
• FIG. 1 shows a grinding device, the basic structure of which consists of two deflection rollers 2, 3 and an abrasive belt 1 guided above it, one of the deflection rollers 2, 3 being drivable.
• a surface of a plate-shaped workpiece 6 is to be ground, which is passed over a conveyor belt 7 in the direction of the arrow below the grinding belt 1, making contact with it.
• the sanding belt 1 is enclosed by a cover 10, which together with a suction 8, which is connected to the cover 10 and opens into the interior towards the sanding belt 1, prevents sanding dust from escaping into the environment.
• the entire grinding device that is to say the grinding belt 1, as well as the cover 10 and the suction 8, is fastened by means of an axis of rotation 9 to a drive, not shown, with which the grinding device can be moved in an oscillating manner or rotating through 360 °.
• the grinding belt 1 consists of a carrier belt 11 which is equipped with a plurality of deformable grinding elements 4, which extend transversely to the direction of rotation of the carrier belt 11 and are fastened to the carrier belt 11 in a manner running parallel to one another.
• the grinding belt 1 On its side facing the workpiece 6, the grinding belt 1 is guided via deflecting rollers 5 into a plane which, relative to the conveyor belt 7 or the workpiece 6, is lower than the revolving plane predetermined by the deflecting rollers 2, 3. This forms an inlet gap 19, through which gentle processing the surface, in particular the profiling of the workpiece 6 provided thereon, is guaranteed when it enters the machining area.
• FIGS. 2 and 3 each show an embodiment of the carrier tape 11.
• the carrier tape 11 according to FIG. 2 has recesses 13 in the form of dovetail grooves, into each of which a grinding element 4 can be inserted, as shown in FIGS. 4 and 5.
• the carrier tape 11 according to FIG. 2 can consist of a suitable rubber, for example hard rubber, or a plastic.
• carrier strips 12 are applied to the smooth-surface carrier tape 11, for example by gluing, which are also each provided with receptacles 13 in the form of dovetail grooves, into which grinding elements 4 can be inserted.
• the receptacles preferably extend over the entire width of the carrier tape 11, as do the grinding elements 4 which are inserted laterally into the receptacles 13 so that they are held in a form-fitting manner.
• the grinding element 4 has a bristle carrier 15 adapted to the receptacle 13 in its contour, on which a brush strip 14 consisting of bristles 16 is fixed.
• This brush strip 14 forms a carrier for an abrasive cloth 17 which is firmly connected to the brush strip 14 in the region facing the bristle carrier 15, for example by gluing.
• the abrasive cloth 17 is applied to one side of the brush strip 14, specifically on the one in the circumferential direction of the grinding belt 1 seen front.
• the abrasive cloth 17 is often partially slotted in the same direction as the bristles 16, the slits 18 being open at the bottom, that is to say on the side facing away from the bristle carrier 15. This results in individual narrow lamellae which enable the grinding element to be deformed very well, thereby ensuring contact with every area of the profiled surface.
• the front side of the abrasive cloth 17 provided with grinding wheels is the side facing away from the brush strip 14.
• the carrier tape 11 consists of a plurality of mutually parallel, extending transversely to the circumferential direction, with a small distance from each other arranged carrier strips 23, each of which is attached to a plate 21 with which the chain links 22 of a chain 20, preferably a roller chain, are connected to one another.
• the chain 20 is guided over sprockets, not shown, which act as deflection rollers 2, 3.
• each carrier strip 23 a plurality of receptacles 13 running parallel and at a distance from one another are provided, into each of which a bristle carrier 15 of the associated grinding element 4 is inserted, where it is held in a form-fitting manner.
• the receptacles 13 are trapezoidal in cross section and are introduced as grooves which are open to one side and into which the bristle carrier 15 can be inserted.
• a locking bolt (not shown) is provided, which disengages if necessary is to be brought so that the grinding element 4 can be pulled out for replacement without any problems.
• the grinding elements 4 are inclined in the opposite direction to the transport direction of the workpiece 6 indicated by an arrow, the side of the grinding element 4 facing the workpiece 6 being coated with the grinding line 17.
• a hold-down device 24 is provided, which is supported on the side of the chain 20 opposite the carrier strips 23, specifically directly on the rollers if the chain 20 is designed as a roller chain is.
• a grinding element 4 is shown in FIG. 7, namely in a front view of the grinding line 17.
• the slits, through which the lamellae 18 are formed run obliquely, the slant, starting from the region adjacent to the bristle carrier 15, sloping towards the center.
• the abrasive cloth 17 consists of two mirror-symmetrical parts, which lie against each other in the middle of the abrasive element 4. It is also conceivable, however, to design the grinding element 4 in two parts, in which case each part is designed as a mirror image of the other.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Mechanical Treatment Of Semiconductor (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (3)

Family

ID=26056688

Family Applications (1)

Country Status (5)

Families Citing this family (15)

Family Cites Families (5)

• 2001
  • 2001-11-24 AT AT01127999T patent/ATE285872T1/de active
  • 2001-11-24 DE DE50104961T patent/DE50104961D1/de not_active Expired - Lifetime
  • 2001-11-24 EP EP01127999A patent/EP1215010B1/de not_active Expired - Lifetime
  • 2001-11-24 ES ES01127999T patent/ES2231375T3/es not_active Expired - Lifetime
  • 2001-11-24 DK DK01127999T patent/DK1215010T3/da active

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