WO2025002841A1 - Schleifscheibe, insbesondere für die bearbeitung von verzahnungen vorzugsweise für die herstellung eines zahnrades - Google Patents
Schleifscheibe, insbesondere für die bearbeitung von verzahnungen vorzugsweise für die herstellung eines zahnrades Download PDFInfo
- Publication number
- WO2025002841A1 WO2025002841A1 PCT/EP2024/066482 EP2024066482W WO2025002841A1 WO 2025002841 A1 WO2025002841 A1 WO 2025002841A1 EP 2024066482 W EP2024066482 W EP 2024066482W WO 2025002841 A1 WO2025002841 A1 WO 2025002841A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grinding wheel
- partial
- partial grinding
- clamping
- wheel according
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/005—Tools specially adapted for use in machines for manufacturing gear teeth with plural tools on a common axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/02—Grinding discs; Grinding worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
- B23F23/1206—Tool mountings
-
- 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
- B24D3/18—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings for porous or cellular structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
- B24D3/32—Resins or natural or synthetic macromolecular compounds for porous or cellular structure
-
- 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
- B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
Definitions
- the invention relates to a grinding wheel, in particular for machining gear teeth, preferably for producing a gear wheel, comprising a clamping unit, at least two partial grinding wheels arranged next to one another on the latter, which run coaxially to one another, of which the first partial grinding wheel is preferably rapid grinding of a predetermined profile of a gear toothing of a gear or the like to be machined and the second partial grinding wheel preferably serves for the subsequent polishing of the same.
- abrasive body of this type is disclosed in the publication US 2021/0299818 A1, in which abrasive round bodies of an abrasive product are assembled with a sleeve body and at least one inner sleeve part, whereby this inner sleeve part can also be made of abrasive material.
- the sleeve bodies have, for example, the same inner diameter and are firmly glued to the inner or otherwise integrated into it. These sleeve bodies can be made of different abrasive materials.
- the invention is based on the object of creating a grinding wheel of the type mentioned at the outset, which enables rapid grinding as roughing and subsequent polishing of a predetermined profile of a gear with high efficiency and precision and is relatively easy to manufacture despite the use of at least two partial grinding wheels.
- the first partial grinding wheel is independent of The second partial grinding wheel can be clamped on both sides between two stop surfaces of the clamping unit.
- the first partial grinding wheel is firmly clamped in place for the solid mounting of the grinding wheel in the machine tool.
- the first partial grinding wheel is made of a harder material for a higher grinding performance than the second partial grinding wheel, thus ensuring a permanently rigid fixation of the grinding wheel in the tool holder of the gear cutting machine.
- the grinding wheel is therefore mounted by clamping the first partial grinding wheel between stop surfaces of the clamping unit and positioning the second partial grinding wheel on the clamping unit, which can preferably be connected to the first partial grinding wheel adjacent to it.
- the second partial grinding wheel with a larger inner diameter than that of the first partial grinding wheel. onized, whereby a shoulder is formed inside the second partial grinding wheel, within which the clamping unit extends and the one lateral stop surface for the first partial grinding wheel is preferably aligned flush with the lateral contact surfaces of the partial grinding wheels. This enables this relatively simple design of the clamping unit and at the same time the stable fastening of the first partial grinding wheel.
- the invention provides that the clamping unit has a metallic support sleeve, the outer casing of which is provided with a shoulder forming a stop surface for holding the second partial grinding wheel.
- the clamping unit is provided with a ring-shaped clamping element on the front side, which can be adjusted in the direction of the rotation axis of the grinding wheel, preferably by means of clamping screws that can be screwed into the clamping unit. It is useful if the ring-shaped clamping element is guided coaxially to the rotation axis with a protruding flange on the support sleeve. Despite this simple design of the clamping unit, the partial grinding wheels can be clamped quickly and extremely precisely.
- annular clamping element completely or partially which holds the first partial grinding wheel. This means that the overall length of the grinding wheel or the clamping unit can be kept short.
- the invention provides that the support sleeve is provided on the inside with fastening and/or centering holes.
- the invention provides that the inner diameters of the partial grinding wheels and the outer diameters of the outer casing of the support sleeve or the clamping element are manufactured with high precision at least in the hundredth of a millimeter range, and that they can be placed on top of each other with almost no play without any aids.
- composition of the partial grinding wheels it is particularly advantageous if they are made of different materials due to their working functions.
- the first partial grinding wheel is advantageously manufactured as a ceramic bonded grinding wheel with abrasive grains of 25-70 vol%, a glass or ceramic bond of 5-40 vol% and pores of 10-80 vol% with an E-modulus range of 5-50 GPa.
- the second part of the grinding wheel is preferably a resin-bonded grinding wheel made of a soft material with a certain percentage of abrasive grains and a polymer bond, with an elastic modulus range of 1-10 GPa.
- Fig. 1 is a half longitudinal section of a grinding wheel according to the invention.
- Fig. 2 shows a half longitudinal section of a variant of a grinding wheel according to the invention.
- the grinding wheel shown in Fig. 1 is a grinding worm as a profiled grinding wheel with a rotation axis 13. It consists of a metallic clamping unit 1 and two partial grinding wheels 2, 3 joined together, which are sleeve-shaped and are made of an abrasive material at least in the outer processing area.
- this grinding wheel is in particular to polish the teeth of a gear or the like, with the wheel being machined in a known manner by means of continuous generating grinding, partial generating grinding, discontinuous or continuous profile grinding of workpieces.
- the first partial grinding wheel 2 is used for rapid grinding, also known as roughing, of a given profile, and the second partial grinding wheel 3 is used for subsequent polishing of the profile.
- Both partial wheels are arranged next to one another in the clamping unit 1 and are firmly connected to one another at their contact surface 4, preferably by gluing them together. However, they could also be simply pressed together without being connected.
- These partial grinding wheels 2, 3 are provided with the same outer diameter and their teeth are designed with a continuous transition from one wheel to the other at the contact surface 4, so that the teeth of a workpiece can be produced in one operation.
- the grinding wheel could also be designed for rough and fine polishing or for rough and fine machining of a workpiece, which can be influenced primarily by the choice of the material composition of the abrasive materials at least in the outer machining area of the partial grinding wheels 2, 3.
- the clamping unit 1 comprises a metal support sleeve 8 and an annular clamping element 12. The latter is adjustably guided in the direction of the rotation axis 13 by a clamping device in the support sleeve 8, whereby this clamping device can be implemented, for example, as illustrated, as one or more clamping screws 14.
- the first partial grinding wheel 2 is fastened by this clamping element 12 and the second partial wheel 3 is positioned or fixed at the same time.
- the clamping unit 1 is designed such that the first partial grinding wheel 2 is clamped on both sides between two stop surfaces 6,
- the second partial grinding wheel 3 has a larger inner diameter D3 than the inner diameter D2 of the first partial grinding wheel 2.
- a shoulder 5 is formed within the second partial grinding wheel 3, into which the clamping unit 1 extends and thereby forms this lateral stop surface 6 for the first partial grinding wheel 2, which is preferably arranged flush with the contact surface 4.
- the clamping unit 1 is provided with shoulders 11, 18, of which one shoulder 11 with the stop surface 10 is formed by an end flange 9 on the support sleeve 8 and opposite the shoulders 5, 18 on the clamping element 12.
- the inner diameters D2, D3 of the partial grinding wheels 2, 3 and the outer diameter(s) of the outer casing 8' of the support sleeve 8 or the clamping element 12 are dimensioned with high-precision dimensions, such that they can be slipped onto the support sleeve or the clamping element with almost no play.
- the partial grinding wheel 2 is first slipped onto the support sleeve 8 and the partial grinding wheel 3 onto the clamping element 12 and then The latter is then screwed laterally to the support sleeve 8 by means of the screws 14, so that the partial grinding wheel 2 is advantageously fastened in the clamping unit 1 with a predetermined clamping force.
- This clamping element 12 receives the second partial grinding wheel 3 on its outer circumference and the shoulder 18 and its front stop surface 6 presses laterally against the partial grinding wheel 2 in the assembled state in order to clamp it firmly.
- the thickness b of the partial grinding wheel 3 and the groove length from the stop surface 6 to the shoulder 18 of the clamping element 12 are preferably dimensioned to be the same length so that no clamping force acts on this partial grinding wheel 3 from the clamping element 12, but advantageously there is also no play between them.
- the thickness b of the partial grinding wheel 3 to the thickness of the partial grinding wheel 2 is shown in a ratio of approximately 1:3. This ratio can be adjusted and optimized in a targeted manner depending on the requirements for machining a workpiece. In any case, this ratio can be adjusted practically as desired due to the design of the grinding wheel according to the invention.
- the support sleeve 8 is provided on the front side with an annular projection 15 on which the annular clamping element 12 is guided coaxially to the rotation axis 13, and it also has fastening and/or centering holes 16 on the inside which can accommodate corresponding means for fastening the grinding wheel to the drive spindle of the machine tool.
- the grinding wheel according to Fig. 2 is shown as a raw grinding wheel, in which no worm gearing or the like is incorporated into the outer circumference of its partial grinding wheels 22, 23. Certain details of the grinding wheel correspond to those according to Fig. 1. Therefore, not all details are explained again below and some of the same reference symbols are used. This also applies to the function and operation of the grinding wheel explained below.
- the first partial grinding wheel 22 is accommodated in its end region in a shoulder 17 of the clamping element 32, which is designed with a stop surface 30, and opposite it is accommodated in a shoulder 25 with a stop surface 26.
- the first partial grinding wheel 22 is thus fastened independently of the second partial grinding wheel 23 on the clamping unit 21 between the two formed stop surfaces 26, 30.
- the second partial grinding wheel 23, on the other hand, is fixed on the support sleeve 28 of the clamping unit 21.
- the second partial grinding wheel 23 is dimensioned with the larger inner diameter D3 than the inner diameter D2 of the first partial grinding wheel 22 and thus a shoulder 25 is present within the second partial grinding wheel 23 into which the clamping unit 21 extends. and thereby forms this lateral stop surface 26 for the first partial grinding wheel 22.
- the partial grinding wheels 22, 23 are again advantageously aligned with the lateral contact surfaces 24 flush with this stop surface 26 of the shoulder 25.
- the partial grinding wheel 23 could, for example, engage in a lateral annular recess of the partial grinding wheel 22 and thus the contact surfaces 24 would be arranged offset from the stop surface 26.
- the first partial grinding wheel 2, 22 of the grinding wheel according to the invention according to Fig. 1 or Fig. 2 is preferably made of a hard material consisting of a ceramic-bonded grinding wheel with abrasive grains of 25-70 volume percent (vol%), a glass and/or ceramic bond of 5-40 vol% and a pore content of 10-80 vol%, wherein it has an elastic modulus in the range of 5-50 GPa.
- the abrasive grains of this first partial grinding wheel 2, 22 are corundum, silicon carbide, boron nitride, diamond and/or similar materials.
- the average abrasive grain diameter of the abrasive grains is preferably between 30 and 300 micrometers.
- the second partial grinding wheel 3, 23 of the grinding wheel according to the invention is preferably composed of a softer material from a synthetic resin-bonded grinding wheel with abrasive grains, a polymer bond and pores, whereby it has an E-modulus in the range of 1-10 GPa.
- the abrasive grains of this second partial grinding wheel 3, 23 are also advantageously corundum, silicon carbide, boron nitride, diamond and/or similar materials, while the polymer bond uses polyurethane, epoxy resin or the like.
- the average abrasive grain diameter of the abrasive grains is preferably between 3 and 40 micrometers.
- the second partial grinding wheel could at least be secured in the clamping unit by an additional clamping device.
- more than two partial grinding wheels could be arranged next to each other to preferably allow a further gradation between roughing and polishing.
- the grinding wheel can be mounted on the drive spindle of the machine tool, which is rotated by a motor, in such a way that either the second partial grinding wheel or the first partial grinding wheel is advantageously placed on the motor side.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480041970.8A CN121419850A (zh) | 2023-06-28 | 2024-06-13 | 尤其是用于加工齿部的砂轮、优选用于制造齿轮的砂轮 |
| EP24733169.7A EP4735198A1 (de) | 2023-06-28 | 2024-06-13 | Schleifscheibe, insbesondere für die bearbeitung von verzahnungen vorzugsweise für die herstellung eines zahnrades |
| MX2026000015A MX2026000015A (es) | 2023-06-28 | 2026-01-07 | Rueda de rectificado, en particular para el mecanizado de dientes, preferentemente para la fabricacion de un engranaje |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH000697/2023 | 2023-06-28 | ||
| CH000697/2023A CH720898B1 (de) | 2023-06-28 | 2023-06-28 | Schleifscheibe, insbesondere für die Bearbeitung von Verzahnungen vorzugsweise für die Herstellung eines Zahnrades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025002841A1 true WO2025002841A1 (de) | 2025-01-02 |
Family
ID=91581136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/066482 Ceased WO2025002841A1 (de) | 2023-06-28 | 2024-06-13 | Schleifscheibe, insbesondere für die bearbeitung von verzahnungen vorzugsweise für die herstellung eines zahnrades |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4735198A1 (de) |
| CN (1) | CN121419850A (de) |
| CH (1) | CH720898B1 (de) |
| MX (1) | MX2026000015A (de) |
| WO (1) | WO2025002841A1 (de) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388781A (en) * | 1981-09-21 | 1983-06-21 | The Gleason Works | Rotary tool for straddle grinding |
| US5074080A (en) * | 1989-09-11 | 1991-12-24 | Hurth Maschinen Und Werkzeuge G.M.B.H. | Tool for the precision working of tooth flanks of hardened gears |
| US6257963B1 (en) * | 2000-05-12 | 2001-07-10 | Reishauer Ag | Grinding worm for the continuous generating grinding of gear wheels |
| US20180264626A1 (en) * | 2015-09-08 | 2018-09-20 | 3M Innovative Properties Company | Abrasive rotary tool with abrasive agglomerates |
| CN211867521U (zh) * | 2020-03-12 | 2020-11-06 | 沈阳中方砂轮有限公司 | 一种用于磨削高速钢的砂轮 |
| US20210299818A1 (en) | 2016-09-09 | 2021-09-30 | Saint-Gobain Abrasives, Inc. | Abrasive articles having a plurality of portions and methods for forming same |
| US20220176517A1 (en) * | 2019-08-23 | 2022-06-09 | Atlantic Gmbh | Three layer grinding wheel |
-
2023
- 2023-06-28 CH CH000697/2023A patent/CH720898B1/de unknown
-
2024
- 2024-06-13 CN CN202480041970.8A patent/CN121419850A/zh active Pending
- 2024-06-13 EP EP24733169.7A patent/EP4735198A1/de active Pending
- 2024-06-13 WO PCT/EP2024/066482 patent/WO2025002841A1/de not_active Ceased
-
2026
- 2026-01-07 MX MX2026000015A patent/MX2026000015A/es unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388781A (en) * | 1981-09-21 | 1983-06-21 | The Gleason Works | Rotary tool for straddle grinding |
| US5074080A (en) * | 1989-09-11 | 1991-12-24 | Hurth Maschinen Und Werkzeuge G.M.B.H. | Tool for the precision working of tooth flanks of hardened gears |
| US6257963B1 (en) * | 2000-05-12 | 2001-07-10 | Reishauer Ag | Grinding worm for the continuous generating grinding of gear wheels |
| US20180264626A1 (en) * | 2015-09-08 | 2018-09-20 | 3M Innovative Properties Company | Abrasive rotary tool with abrasive agglomerates |
| US20210299818A1 (en) | 2016-09-09 | 2021-09-30 | Saint-Gobain Abrasives, Inc. | Abrasive articles having a plurality of portions and methods for forming same |
| US20220176517A1 (en) * | 2019-08-23 | 2022-06-09 | Atlantic Gmbh | Three layer grinding wheel |
| CN211867521U (zh) * | 2020-03-12 | 2020-11-06 | 沈阳中方砂轮有限公司 | 一种用于磨削高速钢的砂轮 |
Also Published As
| Publication number | Publication date |
|---|---|
| CH720898A2 (de) | 2025-01-15 |
| CN121419850A (zh) | 2026-01-27 |
| MX2026000015A (es) | 2026-02-03 |
| EP4735198A1 (de) | 2026-05-06 |
| CH720898B1 (de) | 2026-04-30 |
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