Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
  • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
  • B24D7/066—Grinding blocks; their mountings or supports

Definitions

• the invention relates to a grinding wheel comprising a carrier disk and grinding segments, the carrier disk having slots and grinding segments inserted therein.
• the object of the present invention is to provide a generic grinding wheel, which has a longer durability compared to conventional grinding wheels.
• the abrasive segments protrude axially parallel to the axis of rotation of the grinding wheel in the grinding direction of the grinding wheel on the carrier disc and on the side facing away from the grinding direction of the carrier disc with the carrier disc inextricably connected, preferably soldered, particularly preferably welded, are.
• the attachment between the carrier disc and the abrasive segments can be done very easily, the abrasive segments protrude axially parallel to the axis of rotation on the grinding wheel.
• an insoluble (or non-detachable) attachment mechanisms come the known attachment mechanisms in question, in particular solder or Welded joints, wherein the choice of attachment depends on the carrier material and the abrasive segment material.
• the shear force on the individual abrasive segments can be further reduced in the context of an additional improvement by the grinding wheel is designed such that the slots are arranged obliquely to the radius of the grinding wheel. Part of the forces acting on the abrasive segments forces is better delivered to the carrier disc.
• the slots are open towards the periphery of the grinding wheel. This makes it easier to produce the grinding wheel, and it is also beneficial for the grinding process itself, when the abrasive segments are arranged in the outer part of the grinding wheel.
• the grinding segments can be arranged at virtually any angle ⁇ from 0 ° to 90 ° to the radius of the grinding wheels, it is provided in an embodiment that the slots with the radius enclose an angle ⁇ different from 90 °, preferably an angle of about 25 ° ,
• the carrier disc has recesses. Very efficiently, the dust could be removed if the recesses are elongated or drop-shaped.
• the recesses include an angle different from 90 ° with the radius of the grinding wheel, preferably an angle of about 25 °.
• the inclination compared to the circumference or radius is in a very similar range favorable as the inclination of the abrasive segments, ie at an angle between 0 ° and 90 °, preferably about 25 °, ie, the segments and recesses could be arranged in parallel.
• the invention in addition to the grinding wheel according to the invention, the invention of course also has the task of providing a method for producing a grinding wheel.
• slots are introduced into the carrier disk, then abrasive segments are inserted into the slots so that they protrude axially parallel to the axis of rotation of the grinding wheel in the grinding direction of the grinding wheel on the carrier disk, and that finally the grinding segments on the side facing away from the grinding direction with the carrier disk connected, preferably welded. It is advantageous if the abrasive segments are introduced into the slots in such a way that they protrude only to the front of the grinding wheel on the grinding wheel.
• Abrasive wheels according to the invention are generally used with hand-operated machines (for example angle grinders).
• the grinding wheel may have a hub. All recesses and slots can be introduced, for example, with a laser.
• Fig. 1 is a view on the back (Fig. 1b) of a grinding wheel according to the invention and a cross section (Fig. 1a) by the same grinding wheel according to the invention, and
• FIG. 2 shows a variant for grinding segments which are used for the method according to the invention (or for grinding wheels according to the invention).
• Fig. 1 b is now a view of the back of a grinding wheel 1 according to the invention can be seen.
• the grinding wheel 1 comprises a carrier disk 2 and numerous grinding segments 3, which are inserted into slot-shaped recesses 4 of the carrier disk 2.
• the abrasive segments 3 are permanently attached to the support plate 2, in the case shown by a weld 11 on one side of the slot 4.
• the slots 4 are arranged obliquely to the radius R of the grinding wheel 1.
• the slots are 4 for The circumference U of the grinding wheel 1 is open.
• the abrasive segments 3 can thus be easily inserted laterally into the slots 4 of the carrier disc 2.
• two abrasive segments 3 are arranged side by side in certain slots 4.
• the slots 4 include the radius R a different angle of 90 ° ⁇ . In the illustrated embodiment, this angle ⁇ is about 25 °.
• the angle ⁇ is to be measured so that on the one hand the radius R of the grinding wheel 1 is used, which just touches the end of the slot 4 located at the circumference U (first axis). Should the slot 4 not extend to the circumference (and / or be curved), the tangent at the outermost edge of the slot 4 is used and optionally extended to the circumference U, so that the radius R is used, where the tangent intersects the circumference U.
• the second axis forms the slot itself. For a curved (and / or non-open) slot 4, the tangent at the outermost point of the slot 4 is to be used as an axis.
• the abrasive segments 3 protrude out of the plane of the carrier disk 2. However, in this embodiment they only do so in the direction of the front side, ie in the direction of the grinding. On the back of the grinding segments 3 are approximately positively in the slots, so that abrasive segments 3 and carrier plates 2 can be easily connected to each other. In the exemplary embodiment shown, it is envisaged to produce a connection by means of a weld seam 11 on the rear side. For this it is necessary that the abrasive segments 3 and the carrier disc 2 are made of materials which are welded together.
• a solution could be used, as described in EP 1 332 822 A1.
• abrasive segments 3 are used with so-called spacers 17. These intermediate pieces 17 on the one hand carry the abrasive and on the other hand are well welded to the support plate 2, as will be explained in more detail in Fig. 2.
• FIG. 2 such a grinding segment 3 with intermediate piece 17 in side view (left) and in cross section (right) is shown.
• the region indicated by the reference numeral 15 in FIG. 2 represents the region of the abrasive segment 3 which comprises the abrasive.
• the region 16 is a so-called neutral region, which consists essentially of the same material as the grinding region, but has (almost) no abrasive grain.
• Such abrasive segments 3 with intermediate pieces 17 can be produced, for example, by sintering binder containing cutting agent being sintered onto the material forming the intermediate pieces 17, after which individual intermediate pieces 17 with sintered abrasive segments 3 are cut off or cut off. In order to save expensive cutting means, just in the area 16, the cutting means can be left out.
• the abrasive segment 3 thus produced with intermediate piece 17 can now be inserted with the intermediate piece region 17 into the slots 4 and welded to the carrier disk 2 in the simplest case.
• the intermediate piece 17 is only required if the abrasive segment 3 does not connect directly to the carrier plate 2, preferably can be welded. If the abrasive segments 3 can be connected to the carrier disk 2 anyway, the intermediate pieces 17 can be dispensed with.
• the abrasive segment 3 could be made of 25CrMo4 or St 52 (and have abrasive area 15), while the carrier disk could be 48CrMoV67 steel.
• the intermediate pieces 17 consist of a steel with a carbon content of less than 0.35% or a carbon equivalent of less than 0.75%, in particular St 52 or 25CrMo 4, good weldability of spacers 17 and carrier disk 2 is ensured.
• a coating could be applied to the abrasive segment 3.
• Such a coating could consist, for example, of SnZnCo, CoSnZn and / or matt nickel.
• the abrasive segments 3 have a length of 10 mm, are approximately square and flat.
• the grinding wheel 1 described here is approximately circular and has round recesses 19 on the edge of the carrier disk 2, so that the grinding segments 3 are free. This allows processing of corners of a material to be sanded.
• Other shapes for the grinding wheel are equally conceivable (for example, grinding discs and cup grinding wheels are mentioned here by way of example).

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

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (5)

Cited By (1)

Citations (4)

Family Cites Families (4)

• 2006
  • 2006-07-25 AT AT0126106A patent/AT503981B1/de not_active IP Right Cessation
• 2007
  • 2007-07-20 EP EP07784585A patent/EP2043817B1/de not_active Not-in-force
  • 2007-07-20 AT AT07784585T patent/ATE489200T1/de active
  • 2007-07-20 DE DE502007005773T patent/DE502007005773D1/de active Active
  • 2007-07-20 WO PCT/AT2007/000354 patent/WO2008011646A1/de active Application Filing
  • 2007-07-20 ES ES07784585T patent/ES2356853T3/es active Active

Patent Citations (4)

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