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
  • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
  • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these 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
  • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
  • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
  • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
  • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material

Definitions

• the present invention relates to a polishing tool according to the preamble of claim 1 and a device according to the preamble of claim 1 1.
• a generic polishing tool is known from DE 10 2016 006 741 A1.
• the generic polishing tool has a curved head, which carries a flexible or elastic polishing element to form a curved or curved polishing surface.
• Such a polishing tool is used in particular for zonal polishing of optical workpieces.
• the polishing surface of the polishing tool is only partially applied to the workpiece to be polished in the area of a contact surface.
• This contact surface is significantly smaller compared to the surface of the workpiece to be polished, in particular compared to the radial extension of the workpiece.
• a different polishing tool is preferably selected as a function of the surface to be polished, in particular the (curvature) radius of the workpiece.
• the (curvature) radius of the workpiece is larger than the (curvature) radius of the polishing surface of the polishing tool, preferably by at least a factor of two.
• Zonal polishing in particular also allows polishing of aspherical and / or freely shaped surfaces of workpieces and is preferably used for precision optics, for example for mirrors or lenses, or for correcting manufacturing errors.
• the curved head of the generic polishing tool is usually produced by turning.
• the curved polishing surface of the polishing tool has a defined, exact dimension / shape or a geometry with very little geometric deviations.
• polishing tool deforms deterministically and repeatably when pressed against the workpiece in order to achieve an optimal polishing result. This requirement makes the manufacture of such a polishing tool, in particular of the curved head, very complex and expensive. Furthermore, the structure of the generic polishing tool requires that it be regularly dressed during use.
• the object of the present invention is therefore to improve a polishing tool of the generic type or to develop it in such a way that its manufacture is simplified, in particular while maintaining the exact dimensions or geometry of the curved head.
• the solution to this problem consists in a polishing tool with the features of claim 1 and in a device with such a polishing tool according to claim 1 1.
• a holder which is suitable for being connected to a tool spindle, in particular in a form-fitting and / or non-positive manner.
• the holder preferably has a particularly concave, particularly preferably spherical, receptacle in which a preferably elastically or elastically deformable ball - in particular with defined dimensions and defined (Shore) hardness - is received.
• the free or the surface of the ball facing away from the holder is preferably provided directly with a polishing film.
• the polishing tool according to the invention is very easy to manufacture.
• the dimensioning or geometry of the ball can be realized extremely precisely and reproducibly, so that the end result is a high-precision polishing tool, in particular for the zonal polishing of optical workpieces.
• the size and the properties of the polishing tool according to the invention can also be easily adapted to the requirements of the workpiece to be polished.
• a ball with the (Shore) hardness required in the individual case can be selected as often as desired and accommodated in the holder, or a suitable polishing film with the desired polishing properties can be selected and attached to the free surface of the ball.
• the holder can for example be made of a plastic, in particular (injection) molded.
• a particularly suitable plastic is hard PVC (PVC-U).
• the ball is preferably elastically or elastically deformable and / or can be made, for example, of a rubber material that has a defined (Shore) hardness, for example in the range from SH 50 to SH 65.
• the polishing film is preferably held or cut in the form of a ball development and attached, in particular glued, to the free surface of the ball without tension and / or wrinkles.
• the ball development can be cut out of a flat polishing film and attached to the free surface of the ball.
• a suitable material for the polishing film is, for example, polyurethane LP-13 with a thickness of 0.5 mm.
• the result is a simple and inexpensive to produce, high-precision polishing tool with a long service life, which - particularly due to the highly precise fastening of the polishing film on the ball - does not have to be dressed during manufacture and / or during use.
• the polishing tool according to the invention enables, in particular due to the deterministic, uniform elastic properties, even removal over a longer period or after several polishing processes, and thus an optimal polishing result.
• 1 a shows a first exemplary embodiment of a polishing tool according to the invention in a perspective, exploded view
• 1 b the polishing tool according to FIG. 1 a in an assembled state
• FIG. 3a shows a schematic section of the polishing tool according to the invention in accordance with a further embodiment
• FIG. 3b shows a schematic section of the polishing tool according to FIG. 3a in
• FIG. 4a shows a schematic section of the polishing tool according to the invention in accordance with a further embodiment
• FIG. 4b shows a schematic section of the polishing tool according to FIG. 4a
• 5a shows a schematic section of the polishing tool according to the invention in accordance with a further embodiment
• 5b shows a schematic section of the polishing tool according to FIG. 5a
• FIG. 6a shows a schematic section of the polishing tool according to the invention in accordance with a further embodiment
• FIG. 6b shows a schematic section of the polishing tool according to FIG. 6a
• the polishing tool 10 is composed of a holder 11, a ball 12 and a polishing film 13, preferably in the form of a ball development.
• polishing tool 10 according to the invention can also have other components.
• the holder 1 1 is preferably designed to hold the ball 12 in a positive, non-positive and / or integral manner, in particular immovably, and / or to connect it to a tool spindle (not shown).
• the polishing tool 10, in particular the holder 11, is preferably at least substantially cylindrical and / or in the form of a (circular) cylinder.
• the polishing tool 10 or the holder 11 is particularly preferably at least essentially rotationally symmetrical.
• the polishing tool 10 preferably has a tool axis A1, in particular wherein the tool axis A1 is a longitudinal, symmetrical, central and / or rotational axis of the preferably elongated and / or rotationally symmetrical polishing tool 10 and / or the preferably elongated and / or rotationally symmetrical holder 11 forms.
• the tool axis A1 is a longitudinal, symmetrical, central and / or rotational axis of the preferably elongated and / or rotationally symmetrical polishing tool 10 and / or the preferably elongated and / or rotationally symmetrical holder 11 forms.
• the holder 1 1 has an adapter area 1 1 a for connection to or receiving in a tool spindle (not shown) and a recess or receiving 1 1 b, in particular for the ball 12.
• the adapter area 11a preferably forms a first or axial end of the holder and the receptacle 11b a second or near the workpiece (axial) end of the holder 11.
• the adapter area 11a and the receptacle 11b are on opposite sides Sides and ends of the bracket 1 1 arranged.
• the adapter region 11a is preferably cylindrical and / or formed by a (circular) cylinder.
• the adapter region 1 1a preferably has a constant diameter, in particular along the tool axis A1, in particular of at least essentially 25 mm.
• the length or axial extent of the adapter region 11 a is preferably at least essentially 42 mm.
• the adapter area 1 1a can preferably be clamped in a tool chuck of a tool spindle.
• the bracket 1 1 is preferably formed in one piece. However, it is also possible for the holder 11 to be constructed in several parts or to be composed of several components. In the exemplary embodiment, the holder 11 is cast in a manner known per se from a suitable plastic, for example hard PVC (PVC-U).
• PVC-U hard PVC
• the receptacle 1 1 b is preferably designed to receive the ball 12.
• the receptacle 1 1 b is designed to hold the ball 12 in a form-fitting, force-fitting and / or material-locking manner.
• the receptacle 11b is concave, in particular spherical, very particularly preferably at least substantially hemispherical.
• the receptacle 1 1 b is designed as a spherical segment or spherical shell.
• the recess or receptacle 11b is dimensioned such that it can receive a ball 12 preferably without play, as will be explained in more detail below.
• the ball 12 is made of solid rubber in the exemplary embodiment and preferably has a Shore hardness of SH 50 to SH 65.
• the ball 12 can be glued in the recess 11b, for example.
• solutions are also possible in which the ball 12 is additionally or alternatively held positively and / or non-positively in the receptacle 11b, as will be explained in more detail below.
• a (first) part of the ball 12 is let into the holder 11 or a (second) part of the ball 12 protrudes from the holder 11.
• the ball 12 can consequently be divided into two parts or segments, as indicated by a dashed line in FIG. 1 a.
• the ball 12 has a first or free ball segment and a second or hidden or held ball segment, the first or free ball segment of the ball 12 protruding from the holder 11, in particular the receptacle 11b, and the second or hidden or held spherical segment in the holder 1 1, in particular the receptacle 1 1 b, embedded or held by the latter.
• the ball 12 is very particularly preferably at least essentially divided into two hemispheres and / or the first or free ball segment and the second or hidden ball segment are each designed as a hemisphere. In this way, on the one hand a good connection between the ball 12 and the holder 11 is made possible and on the other hand a sufficient surface of the ball 12 for polishing or fastening the polishing film 13 is provided.
• the ball 12, in particular the first ball segment, preferably has a first or free surface or working surface 12a, preferably with the free surface or working surface 12a facing away from the holder 11, in particular the receptacle 11b.
• the ball 12, in particular the second ball segment preferably has a second or hidden surface or holding surface 12b, preferably with the holding surface 12b facing the holder 11, in particular the holder 11b.
• the second spherical segment or the holding surface 12b is positively, non-positively and / or materially connected, in particular by gluing, to the holder 11, in particular the receptacle 11b.
• the polishing tool 10 preferably has the polishing film 13 and / or a polishing surface 13a, preferably wherein the polishing film 13 or the polishing surface 13a forms a (first) axial or free end of the polishing tool 10 or the ball 12 at least partially, in particular on a side facing away from the holder 11, covered and / or in direct contact with the workpiece when polishing a workpiece (not shown).
• the free surface 12a of the ball 12 or the first ball segment is preferably provided or coated with the polishing film 13 directly or without an intermediate element.
• the first ball segment or the free surface or working surface 12a of the ball 12 is particularly preferably completely or partially covered with the polishing film 13.
• the polishing film 13 is preferably spaced apart from the edge of the holder 11 or the holder 11b. It is therefore preferred that the polishing film 13 does not completely cover the first ball segment or the free surface 12a of the ball 12 or does not extend (exactly) to the edge of the holder 11 or the holder 11b. In this way, it is prevented that, for example, a deformation of the ball 12 during the polishing causes wrinkles which can impair the polishing result.
• the polishing film 13, in particular the polishing surface 13a is preferably (convex) curved, in particular spherical.
• the curvature of the polishing film 13, in particular the polishing surface 13a particularly preferably corresponds at least substantially to the curvature of the ball 12, in particular the free surface 12a.
• the polishing film 13 is therefore preferably adapted to the ball 12 or the curvature of the ball 12. It is preferred that the polishing film 13 rests tension-free and / or wrinkle-free and / or flat on the ball 12, in particular the free surface or working surface 12a.
• tension-free in the sense of the present invention should preferably be understood to mean that no (local) material deformations or stresses occur in the material of the polishing film 13 and / or the ball 12 due to the adaptation, in particular, of the polishing film 13 to the curvature of the ball 12.
• the polishing film 13 is preferably developed, in particular as a ball segment, and / or as a development, in particular a ball segment.
• development in the sense of the present invention is preferably to be understood as the expansion of a particularly curved or three-dimensional surface into a (two-dimensional) plane, in particular in such a way that the lengths of the surface are retained.
• the outer surface of a cylinder can be developed (exactly) into a (flat) rectangle.
• a ball can be approximated or unwound in segments.
• the polishing film 13 is present as a corresponding ball development, in particular ball segment development, of the free surface 12a of the ball 12.
• the polishing film 13 or the polishing surface 13a is preferably segmented and / or formed by a plurality, preferably at least four or six, in particular segments S of the same size. In the embodiment shown in FIGS. 1 a and 1 b, the polishing film 13 or the polishing surface 13a is formed by four segments S.
• the polishing film 13 or the polishing surface 13a is formed by four segments S.
• other solutions are also possible here, as will be explained in more detail below.
• the segments S can abut one another laterally or in the circumferential direction of the ball 12 and / or can be spaced apart from one another laterally or in the circumferential direction of the ball 12.
• the segments S are spaced apart from one another in such a way that channels S form between the segments.
• the channels of the polishing film 13 or between the segments S preferably intersect on the end face of the polishing tool 10 or in the tool axis A1 and extend from the point of intersection to the edge of the holder 11 or the holder 11b.
• the channels it is possible for the channels to widen from the point of intersection to the edge of the holder 11 or the holder 11b.
• a polishing agent (not shown) can be distributed uniformly over the polishing surface 13a through the channels. Furthermore, abrasion of the workpiece and / or the polishing film 13 can collect in the channels.
• the polishing film 13 preferably has a thickness of at least 0.1 mm, in particular at least 0.3 mm, particularly preferably at least 0.4 mm, and / or at most 3 mm, in particular at most 2 mm, particularly preferably at most 1 mm.
• the polishing film 13 very particularly preferably has a thickness of at least substantially 0.5 mm.
• a polishing film 13 that is too thick does not adapt so well to the curvature of the ball 12, so that the polishing tool 10 may need to be dressed during manufacture.
• a polishing film 13 that is too thin, on the other hand, can tear faster during polishing.
• the polishing film 13 is preferably made of a porous or structured plastic film, for example of polyurethane, preferably with a filler or polishing material being introduced into the polishing film 13.
• the polishing film 13 is cut from a 0.5 mm thick film made of polyurethane LP-13 with cerium oxide as the filling material or polishing material.
• the polishing film 13 can be glued to the free surface 12a of the ball 12 or the first ball segment.
• the exemplary embodiment of the polishing film 13 according to FIG. 2 illustrates that the ball developments can be designed differently depending on the size and the requirements of the individual case. While the polishing film 13 according to FIG. 1 a has the shape of a "flower-shaped" ball development with four "petals” or segments S, the polishing film 13 according to FIG. 2 has the form of a "flower-shaped” ball development with six "petals” or segments S .
• the segments S are of the same size or dimension.
• the segments S are preferably each formed as an isosceles triangle with (slightly) convexly curved legs.
• the polishing film or layer 13 can also be applied to the ball 12 in a different way.
• the ball 12 is preferably formed in one piece.
• the ball 12 is preferably elastic, in particular more elastic or more flexible or softer than the folding 11.
• the ball 12 preferably has a modulus of elasticity of at least 0.5 N / mm 2 or 1 N / mm 2 and / or at most 100 N / mm 2 , 50 N / mm 2 or 10 N / mm 2 .
• the modulus of elasticity is preferably a material characteristic value for the relationship between tension or pressure and elongation or compression during the deformation of a (test) body made of the material.
• a material with a low modulus of elasticity is consequently softer or more elastic or easier to compress than a material with a higher modulus of elasticity.
• the ball 12 is preferably made of a rubber material, in particular a synthetic rubber, for example acrylonitrile-butadiene rubber.
• rubber material in the sense of the present invention is preferably to be understood as meaning all materials which are designed to be rubber-elastic.
• elastomers such as rubber, in particular natural rubber and / or synthetic rubber, such as silicone rubber, as rubber materials in the sense of the present invention .
• elastic or "elasticity” in the sense of the present invention is preferably to be understood as the property of a material to change its shape elastically, ie not plastically, under the action of force and, when the force acting on it ceases to exist - without permanent deformation - into it return to original form.
• the Shore flare, in particular the Shore D flute, the ball 12 is at least SH 30 or SH 40 and / or at most SH 70 or SH 65.
• Hardness is preferably a material property that can be used as a measure of the (mechanical) resistance of a material that the material opposes against mechanical penetration by another body.
• the Shore flare in particular the Shore D flare, is preferably determined in accordance with DIN EN ISO 868: 2003-10 and / or DIN ISO 7619-1: 2012-02.
• the ball 12 preferably has a diameter of at least 5 mm or 10 mm, in particular at least 20 mm or 30 mm, and / or at most 100 mm or 80 mm, in particular at most 50 mm or 40 mm.
• the polishing tool 10 in particular the ball 12, has a very precise geometry, that is to say a geometry with small geometric deviations or tolerances.
• the ball 12 is ground and / or has a roundness accuracy of 0.01 mm or 0.02 mm, preferably the roundness being determined in accordance with DIN EN ISO 1 101: 2014.
• 3a shows the polishing tool 10 according to a further embodiment in a schematic section.
• 3b is an enlarged view of the polishing tool 10 according to FIG. 3a in the region of the receptacle 11b.
• the ball 12 is at least partially, preferably up to half, inserted or inserted into the folding 11, in particular the holder 11b, in particular in such a way that the first ball segment consists of the bracket 11 or the holder 11b protrudes.
• the receptacle 11b is preferably (concave) curved, in particular spherical.
• the curvature of the receptacle 11b particularly preferably corresponds to the curvature of the ball 12 and / or the receptacle 11b or a (imaginary) ball delimited by the receptacle 11b has an (inner) diameter which is at least essentially that
• the (outer) diameter of the ball 12 corresponds or is slightly larger, for example by at most or exactly 0.5 mm or 1 mm, than the (outer) diameter of the ball 12.
• the (inner) diameter of the receptacle 11b or an (imaginary) ball delimited by the receptacle 11b is smaller than the (outer) diameter of the ball 12, preferably by at least or exactly 0.5 mm, 0.4 mm, 0.3 mm or 0.2 mm.
• the (largest) (inner) diameter of the receptacle 11b or a (imaginary) sphere delimited by the receptacle 11b is at least 10 mm, 20 mm or 30 mm and / or at most 100 mm, 50 mm or 40 mm.
• the depth or axial extent of the receptacle 11b preferably corresponds at least substantially to the radius of the ball 12.
• the ball 12 in particular the second ball segment or the second or hidden surface 12b, is glued to the folding 11 or the receptacle 11b, as by an adhesive seam or layer 14 in FIG. 3a and 3b indicated.
• the polishing tool 10 in particular the holder 11, has a channel 15, preferably with the channel 15 opening axially or centrally in the receptacle 11b.
• the channel 15 preferably connects the receptacle 1 1 b with the environment.
• the channel 15 preferably has a first or axial channel section 15a and a second or radial channel section 15b.
• the channel 15, in particular the first channel section 15a extends axially through the holder 11 or from the adapter area 11a for receiving 11b.
• the second channel section 15b preferably extends radially through the holder 11, in particular the adapter area 11a, and / or transversely to the first channel section 15a. In the embodiment shown, the second channel section 15b extends completely through the holder 11 or from one side to the other side. This prevents an imbalance from occurring.
• the channel 15 is preferably formed by one or more bores in the holder 11.
• the channel 15 preferably has a diameter of more than 1 mm and / or less than 5 mm, particularly preferably of at least essentially 3 mm.
• the first channel section 15a consequently enables pressure equalization when the ball 12 is inserted into the holder 11.
• a pressure compensation when clamping the polishing tool 10 is made possible by means of the second channel section 15b.
• the second channel section 15b prevents the air from being pressed against the ball 12 when the polishing tool 10 is clamped in the tool spindle and, if necessary, the ball 12 from detaching from the holder 11.
• the fact that the second channel section 15b is preferably arranged in the adapter area 1 1a prevents polishing agent and / or abrasion from entering the second channel section 15b during the polishing process and possibly clogging it.
• the receptacle 11b preferably has a plurality, in particular two, regions or sections, particularly preferably the regions differing from one another in geometry.
• the receptacle 11b preferably has a first or inner region 11c and a second or outer region 11d, preferably directly adjacent to the first region 11c, preferably with the second region 11d being an axial end of the holder 11 or the recording 1 1 b has or forms.
• the first region 11c is preferably concave, in particular spherical. Particularly preferably, the curvature or the diameter of the first region 11 c or a sphere delimited by the first region 11 c corresponds at least essentially to the curvature or the diameter of the ball 12.
• the first region 11 c is consequently preferably designed as a spherical segment or spherical shell, in particular wherein the radius of the spherical segment or spherical shell corresponds at least substantially to the radius of the sphere 12.
• the second region 1 1 d is preferably cylindrical.
• the second region 11 d is straight or not curved in the axial direction.
• the diameter of the preferably cylindrical second region 11 d is smaller than the diameter of the preferably spherical first region 11 c and / or the ball 12, in particular by at least or exactly 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. It is consequently preferred that, in the assembled state, the second area 11 d or the holder 11 in the second area 11 d - in particular at least essentially radially - presses on the ball 12 or the ball 12 is held in a non-positive manner in the second area 11 d .
• an especially annular (slight) press fit or a centering seat for the ball 12 is preferably produced by means of the second region 11 d.
• a frictional connection between the ball 12 and the holder 11 is generated or a (frictional) force is exerted on the ball 12 exclusively in the second area 11d or through the second area 11d. It is consequently preferred that the ball 12 or the second ball segment is received in the first region 11c without tension or pressure.
• the receptacle 11b in particular the second region 11d, is preferably designed such that the ball 12 is pressed exclusively or at least predominantly radially or transversely to the tool axis A1. In this way, the ball 12 is held securely in the receptacle 11 b or the ball 12 is prevented from being pressed out of the holder 11.
• the depth or axial extent of the first area 11 c is preferably smaller than the radius of the ball 12.
• the second area 11 d preferably has a depth or an axial extent of at least 1 mm or 2 mm and / or at most 5 mm.
• the second region 11 d preferably adjoins the first region 11 c continuously or continuously.
• the first area 1 1 c merges continuously or continuously into the second area 1 1 d.
• solutions are also possible in which the transition between the first region 11 c and the second region 11 d has a step or a bend.
• FIGS. 3 to 6 illustrate that, depending on the size of the ball 12 to be accommodated and depending on the requirements of the individual case, the holder 11 can be shaped differently or have different sizes and / or diameters.
• the polishing tools 10 shown in FIGS. 3 to 6 basically have a comparable construction and differ primarily in the dimensioning of the receptacle 11b.
• the polishing tool 10 has the adapter area 1 1a for connection to a tool spindle (not shown).
• the polishing tool 10 in particular the holder 11, has a shaft 16 and a head 17, preferably with the shaft 16 connecting the adapter region 11a to the head 17.
• the polishing tool 10, in particular the holder 11, preferably has a stop 18 for the defined fastening or holding of the polishing tool 10 on the associated tool spindle or its tool chuck.
• the stop 18 serves in particular to define a defined axial position of the polishing tool 10 relative to the tool spindle.
• the head 17 preferably has or forms the receptacle 11b.
• the receptacle 11b is limited or formed by the wall of the head 17.
• the head 17 has the smallest (outside) diameter of the holder 11 and / or the (largest) (outside) diameter of the head 17 is smaller than the (outside) diameter the adapter area 11 a.
• the shaft 16 is here preferably designed as a cone or truncated cone and / or in particular tapers continuously in the direction of the head 17 or the receptacle 11b.
• the brackets 11 shown in FIGS. 4 to 6 are preferably designed to accommodate a ball 12 which is larger in comparison to the embodiment according to FIGS. 3a and 3b, for example with a diameter of at least essentially 20 mm, 30 mm or 40 mm.
• the head 17 is preferably formed like a mushroom head and / or the (outer) diameter of the holder 11 increases from the shaft 16 to the head 17.
• the (largest) (outer) diameter of the head 17 can be larger than the (largest) (outer) diameter of the shaft 16 and / or the adapter region 11a, as is particularly preferred for the embodiment. 6a and 6b illustrates.
• the shank 16 is at least substantially cylindrical and / or the shank 16 has an (outer) diameter which is constant along the tool axis A1.
• the proposed device for polishing a workpiece preferably has a rotatably driven tool spindle and the proposed polishing tool 10, the polishing tool 10 being exchangeably attached or attachable to the tool spindle.

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

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• 2019
  • 2019-07-29 DE DE102019005294.3A patent/DE102019005294A1/de active Pending
• 2020
  • 2020-01-16 WO PCT/EP2020/051033 patent/WO2020148390A1/de unknown
  • 2020-01-16 US US17/419,407 patent/US20220072675A1/en active Pending
  • 2020-01-16 CN CN202080009686.4A patent/CN113302018A/zh active Pending
  • 2020-01-16 EP EP20701034.9A patent/EP3880403B1/de active Active

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