EP4558736A1 - Rundtischlageranordnung - Google Patents
RundtischlageranordnungInfo
- Publication number
- EP4558736A1 EP4558736A1 EP23737877.3A EP23737877A EP4558736A1 EP 4558736 A1 EP4558736 A1 EP 4558736A1 EP 23737877 A EP23737877 A EP 23737877A EP 4558736 A1 EP4558736 A1 EP 4558736A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotary table
- membrane
- table bearing
- bearing arrangement
- arrangement 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/381—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with at least one row for radial load in combination with at least one row for axial load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/04—Relieving load on bearings using hydraulic or pneumatic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/001—Integrated brakes or clutches for stopping or coupling the relatively movable parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
Definitions
- the invention relates to a rotary table bearing arrangement, comprising a rotary table bearing with an inner ring, an outer ring and rolling elements arranged in one or more rows, which roll on the inner and outer rings.
- Rotary axes or rotary tables are used in machine tools and are supported by an axial-radial bearing.
- Such a rotary table bearing arrangement is disclosed, for example, in DE 102014205097.
- Rotary tables must withstand different machining forces without allowing any significant relative movements.
- the axial-radial bearing also absorbs tilting moments.
- the drive of the rotary table generates the tangential moment. This is not sufficient for many processes. Therefore, the rotary axis is usually fixed using a clamp after positioning. Such a clamping is shown, for example, in DE102019106088 A1.
- the clamping does not absorb any kinetic energy, it is not a brake, but rather creates a tangential moment of resistance that remains in position. To ensure this, the clamping, bearings and table top must be coordinated very precisely. Task of the invention
- the invention is based on the object of specifying a rotary table bearing arrangement which enables a simple adjustment of a rotary table.
- a rotary table bearing arrangement comprising a rotary table bearing with an inner ring, an outer ring and rolling elements arranged in one or more rows, as well as a wave washer with which a rotary table to be assembled can be connected, a clamping device being provided which is mounted on the wave washer acts in such a way that a tangential moment acting on the rotary table bearing can be compensated for by a tangential moment of resistance.
- Adjusting the clamping of a rotary table has previously required considerable effort, as the coordination between the table top and the housing is difficult due to different manufacturing tolerances of large parts.
- this adjustment process is considerably simplified, in particular because the bearing surfaces are manufactured with high precision.
- the reduction in assemblies also results in shorter assembly times.
- the clamping device preferably has a membrane which generates the tangential moment of resistance through friction on the shaft washer. The jamming is therefore achieved by friction on the membrane.
- membrane here means a flat component that has significant elastic deformability.
- a non-movable ring surrounding the wave washer is further preferred provided, which forms a chamber which is sealed in a pressure-tight manner by the membrane, the chamber having a feed for a pressure medium and the ring being arranged in such a way that when a pressure medium is fed into the chamber, the membrane moves in the direction of the shaft disk and This creates the tangential moment of resistance.
- the membrane can also surround the wave washer in sections.
- the jamming can be accomplished in a simple manner by supplying the print medium.
- the pressure medium can be gaseous or liquid, and the clamping can therefore be pneumatic or hydraulic.
- the membrane springs back automatically when the pressure in the pressure medium is reduced.
- the membrane is therefore designed with an elastic design in such a way that no additional reset actuator is required.
- a return spring is preferably provided, through which the membrane can be moved back to its starting position when the pressure in the pressure medium is reduced.
- Such a return spring is particularly advantageous if the design of the membrane requires a rigidity that does not allow automatic return.
- the membrane preferably has a surface facing the wave disk with a friction-increasing property.
- the membrane material that ensures mechanical strength and elasticity can be selected regardless of the fact that there is also a high frictional force to ensure a sufficient tangential moment of resistance. This friction force is generated via the surface material.
- the membrane acts on a radial surface of the wave washer. This allows the clamping device to be placed so that it does not get in the way of assembling the rotary table.
- Figure 1 shows a schematic diagram of a part of a rotary table machine with a rotary table bearing arrangement
- Figure 2 shows a rotary table bearing arrangement with a clamping device.
- Figure 1 shows a section of a rotary table machine 1, comprising a table frame 2 with a frame component 3. Also provided is a shaft 4 with a clamping section for the inner ring of the rotary table bearing, this clamping section being realized via the hollow cylindrical section 5 of the shaft 4.
- the shaft 4 has a table flange 6 on which - not shown in detail - the actual rotary table to be rotated is accommodated.
- the rotary table bearing arrangement also includes the actual rotary table bearing 10, with an outer ring 11 and an inner ring 12.
- the inner ring 12 is guided on the outer ring 11 via a total of three rows of rolling elements 13, 14, 15, the rows of rolling elements 13 and 14 providing axial support and the rolling elements.
- Body row 15 serves for radial support.
- B double row angular roller bearings.
- FIG. 2 now shows, partially schematically, an addition to the rotary table bearing from Figure 1, which is known as such, to include a clamping device 33.
- the se comprises a ring 35 which surrounds a wave washer 30, on which the table flange according to Figure 1 sits.
- a chamber 37 is formed in the ring 35 and is designed to be pressure-tight.
- One side of the chamber 37, which is aligned towards the wave washer 30, is designed as a membrane 31, that is, the chamber wall is made thin so that it has sufficient elasticity to be brought into contact with the wave washer 30 on a radial surface 30a to be able to become.
- pressure medium can be introduced into the chamber 37 via a feed 39 under a pressure such that the resulting excess pressure bulges the membrane 31 outwards so that it reaches the radial surface 30a.
- the pressure medium is directed to the feed 39 via a channel 43 shown schematically.
- the pressure can be adjusted using measuring and control units (not shown) so that the desired clamping force is created on the shaft washer 30 and thus a sufficient tangential moment of resistance is built up.
- the membrane 31 can be designed in such a way that when the pressure in the pressure medium is reduced, it automatically returns to its starting position due to its own elasticity, in which it releases the wave washer 30 again.
- a return spring 41 is provided which causes or supports this return.
- the membrane 31 also has a surface 31a directed towards the wave washer 30, which has a high coefficient of friction.
- the membrane 31 can be formed from a base material suitable for strength and elasticity, regardless of a coefficient of friction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022117967.2A DE102022117967A1 (de) | 2022-07-19 | 2022-07-19 | Rundtischlageranordnung |
| PCT/DE2023/100474 WO2024017432A1 (de) | 2022-07-19 | 2023-06-23 | Rundtischlageranordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4558736A1 true EP4558736A1 (de) | 2025-05-28 |
Family
ID=87136726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23737877.3A Withdrawn EP4558736A1 (de) | 2022-07-19 | 2023-06-23 | Rundtischlageranordnung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4558736A1 (de) |
| CN (1) | CN119487309A (de) |
| DE (1) | DE102022117967A1 (de) |
| WO (1) | WO2024017432A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1770456U (de) * | 1958-05-02 | 1958-07-17 | Fritz Werner Ag | Rundtisch mit hydraulischer klemmung. |
| DE19946424A1 (de) * | 1999-09-28 | 2001-04-05 | Deckel Maho Gmbh | Dreh- oder Schwenkeinrichtung einer Werkzeugmaschine |
| DE102005062520B4 (de) * | 2005-12-15 | 2008-11-13 | Gebr. Heller Maschinenfabrik Gmbh | Feststelleinrichtung für Werkstück/Werkzeugträger |
| DE102009022206B3 (de) * | 2009-05-20 | 2010-12-02 | Schaeffler Technologies Gmbh & Co. Kg | Lagerung mit einer Brems- und/oder Klemmvorrichtung |
| DE102014205097A1 (de) | 2014-03-19 | 2015-09-24 | Schaeffler Technologies AG & Co. KG | Rundtischlageranordnung |
| DE102015008716A1 (de) * | 2015-07-06 | 2017-01-12 | Franz Kessler Gmbh | Antriebsanordnung für eine Schwenkbrücke |
| DE102017214362A1 (de) * | 2017-05-17 | 2018-11-22 | Deckel Maho Pfronten Gmbh | Vorrichtung zum klemmen eines drehbar gelagerten wellenelements, insbesondere zum einsatz an einer werkzeugmaschine, und achsaufbau einer werkzeugmaschine |
| DE102019106088A1 (de) | 2019-03-11 | 2020-09-17 | Starrag Gmbh | Klemmsystem für eine Werkzeugmaschine |
-
2022
- 2022-07-19 DE DE102022117967.2A patent/DE102022117967A1/de not_active Withdrawn
-
2023
- 2023-06-23 WO PCT/DE2023/100474 patent/WO2024017432A1/de not_active Ceased
- 2023-06-23 EP EP23737877.3A patent/EP4558736A1/de not_active Withdrawn
- 2023-06-23 CN CN202380050604.4A patent/CN119487309A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024017432A1 (de) | 2024-01-25 |
| DE102022117967A1 (de) | 2024-01-25 |
| CN119487309A (zh) | 2025-02-18 |
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Legal Events
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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