• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    It is a bezel for supporting a workpiece (6) of a machine tool (5) with a support (2) for mounting preferably on the machine bed (4) of the machine tool (5), with at least one shell (7), the at least one hydrostatic bearing ( 9) for the workpiece (6), and with a between the support (2) and the shell (7) provided for positioning (8), the at least one adjustment axis (14) for adjusting the shell (7) to the workpiece ( 6). In order to enable a special support of the workpiece (6), it is proposed that on the one hand the shell (7) at least two spaced-apart hydrostatic bearing points (9, 10, 11, 12, 13) and on the other hand the positioning (8) at least two inclined to each other extending adjustment axes (14 and 15), wherein on the positioning device (8) the shell (7) on the workpiece (6) for forming a radial workpiece support by means of hydrostatic bearing points (9, 10, 11, 12, 13) is adjustable ,
    公开号:AT510515A1
    申请号:T15792010
    申请日:2010-09-22
    公开日:2012-04-15
    发明作者:Karl Wimmer；Friedrich Dr Pernkopf
    申请人:Wfl Millturn Tech Gmbh & Co Kg；
    IPC主号:
    专利说明:

    22/09 2010 19:19 FAX 0761263884 PA JELL @ 004
    - 1 - (00006 PAT) jel
    The invention relates to a steady rest for supporting a workpiece of a machine tool with a carrier for preferential mounting on the machine bed of the machine tool, with at least one shell having at least one hydrostatic bearing point for the workpiece, and with a provided between the support and the shell positioning, the Has at least one adjustment axis for hiring the shell to the workpiece.
    To reduce the sag of clamped workpieces, it is known from the prior art (DE3909411A1) to use a bezel with a plurality of mutually offset hydrostatic shells in order to be able to support the workpiece at different positions. The disadvantage is. that on the one hand by the considerable number of shells, a comparatively high design effort, on the other hand, a precise match of the bearing axes of the shells requires considerable manufacturing effort. The latter holds in particular the risk of insufficiently accurate support of the workpiece, which prevents disadvantageous to this workpiece high machining accuracy. Known hydrostatic steady rests are therefore usually not suitable for required tight manufacturing tolerances.
    The invention is therefore based on the task to improve a bezel of the type described in such a way that a precise and positionally accurate support of a workpiece of a machine tool can be ensured in a structurally simple manner. In addition, the bezel should be easy to use and stable. 22/09 2010 MI 19:17 [SE / EM NR 5478] @ 004 22/09 2010 19:19 FAX 0761263884 FA JELL © 005
    -2-
    The invention achieves this object by virtue of the fact that, on the one hand, the shell has at least two hydrostatic bearing points spaced apart from one another and, on the other hand, the positioning device has at least two adjustment axes inclined to one another, wherein the shell can be adjusted to the workpiece for forming a radial workpiece support with the aid of the hydrostatic bearing points via the positioning device is.
    If, on the one hand, the shell has at least two hydrostatic bearing points spaced apart from one another, then a common bearing axis for a hydrostatic bearing can be ensured in a simple manner, without the need for complex matching of cooperating shells, as is known from the prior art. Furthermore, if the positioning device has at least two adjustment axes running mutually inclined, the positioning device being able to set the shell against the workpiece for forming a radial workpiece support with the aid of the hydrostatic bearing points, then the particularly accurate support can be utilized on the basis of the common bearing axis, for a robust and easy to handle bezel. In fact, the hydrostatic bearing points on the workpiece can be precisely adjusted by means of these two adjustment axes in such a way that a stable and robust radial support of the workpiece can result, even if only one shell is used in contrast to the prior art. In addition, with the multiaxial adjustment of the shell position possible shell inaccuracies on the curved bearing surface are compensated, so that not only a low-cost but also an easy-to-handle bezel can be created. Various suspensions for a multi-axis adjustability of the shell are conceivable, for example, a combination of several linear bearings or in combination with a heavy bearing or mutually displaceable wedges. In general, however, any mechanical and / or electrical, etc. mechanism is conceivable that can allow at least two degrees of freedom for positioning of the shell. 22/09 2010 MI 19:17 [SE / EM NR 5478] © 005 22/09 2010 19:19 FAX 0761263884 PA JELL © 006 - 3 -
    Simple construction conditions can result if only one shell essentially encloses the lower workpiece haim of the workpiece because, compared to the prior art, only one shell has to be provided for radial support. In addition, a loss of storage fluid can be counteracted with comparatively little effort. Thus, measures to be taken on only one shell, whereby a contamination of the storage fluid against contamination can be kept low. A stable bezel is so structurally easy to create.
    Such measures can be taken in a simple manner, when along the edge of the shell, a seal is provided extending. Because of the size, the shell according to the invention can in fact lead to a particular freedom in the arrangement of the seal, whereby the constructional outlay is advantageously also significantly reduced by a reduced number of shells. It can therefore not only protected in a structurally simple way, the storage fluid against contamination and thus created a particularly stable bezel, but also despite the sealing of the hydrostatic radial bearing a particularly cost-effective bezel allows.
    The support of the workpiece can be further improved if the hydrostatic bearing points of the shell form a continuous radial bearing surface and thus can provide a wide bearing surface. In particular, a balance between the hydrostatic characteristics can also result from these contiguous Lagerftächen, which can also set a relatively high dynamic radial bearing.
    If the shell has two edge bearing bases and at least one hydrostatic bearing point in the middle, then a comparatively stable bearing of the workpiece on the steady rest can be ensured. In addition, it can thus arise between the pockets of open spaces that can be used with changed load requirements for subsequently introduced bearings. 22/09 2010 MI 19:17 [SE / EM NR 5478] © 006 22/09 2010 19:19 FAX 0761263884 PA JELL 0007
    -4 -
    If the slats on the carrier according to the workpiece axis partially tilted mounted, then a bending-induced sagging of the workpiece can be absorbed by the radial bearing, without having to expect a reduced bearing gap. The risk of dry running can thus be reduced, which in addition to an increase in the stability of the steady rest can also preclude damage to the workpiece.
    A comparatively simple adjustment possibility can result if the positioning device has two actuators which can be adjusted linearly along an adjustment axis and which act on different shell positions.
    Such an adjustment can also be made possible if the positioning device has an actuator which can be displaced linearly along an adjustment axis and furthermore has an actuator mounted pivotably about a pivot axis
    If the machine tool has, on the one hand, a workpiece clamping device for fastening a workpiece and, on the other hand, the steady rest according to the invention for supporting the clamped workpiece, then a special accuracy of the machine tool can be made possible. With this shell, namely, in contrast to the prior art, a radial support can be created, so that several shells with axial supports unnecessary, as is realized in the prior art.
    Furthermore, it can prove to be particularly advantageous if a shell with at least two spaced-apart hydrostatic bearing points, which have a common bearing axis, is used for providing a radial support of a workpiece clamped in a machine tool.
    In the figures, for example, the subject invention is illustrated with reference to several embodiments. Show it
    1 is a side view of the bezel according to a first embodiment, 22/09 2010 MI 19:17 [SE / EM NR 5478] @ 007 22/09 2010 19:20 FAX 0761263884 PA JELL @ 008 -5-
    2 is an enlarged side view of the shell of the partially illustrated bezel of FIG. 1,
    3 is a plan view of the shell,
    4 is a sectional view according to IH-Ili of Fig. 3,
    5 shows an alternative embodiment of the bezel,
    6 is a side view of the shell of FIG. 5 partially broken away; and FIG. 7 is a plan view of the shell of FIG. 6.
    The illustrated as shown in FIG. 1 bezel 1 as a first embodiment has a support 2, which is mounted on a carriage 3 mounted on a machine bed 4 of a not dargesteliten machine tool 5 slidably mounted. The bezel 1 is used to support a workpiece 6, so as to reduce, for example, a deflection of the workpiece 6, which is clamped in a workpiece clamping device, not shown, for example, a chuck. For this purpose, the steady rest 1 on a shell 7, which can be employed on the workpiece 6 via a positioning device 8, for the purpose of setting up the hydrostatic bearing 9 against the workpiece 6. According to the invention, a particularly advantageous storage of Workpiece 6 combines to provide a constructive simplicity of the bezel 1, the shell 7 is provided with a plurality of bearings 9, 10, 11, 12 and 13. These bearings 9, 10, 11, 12 and 13 are arranged spaced apart such that the shell 7 can form a radial bearing surface 18 for the workpiece 6, when the shell is adjusted by means of the positioning device 8 to the workpiece 6. For this purpose, the positioning device 8 at least two mutually inclined adjustment axes 14 and 15, which each belong to a linear actuator 14 'and 15'. About related crank drives 16 and 17, the actuators 14 'and 15' can be actuated, the mechanism has not been shown in detail. The shell 7 can therefore stabilize the workpiece 6 as a hydrostatic radial bearing in its position, so that expensive additional shells - as known in the art - need not be provided. 22/09 2010 MI 19:17 [SE / EM NR 5478] @ 008 22/09 2010 19:20 FAX 0761263884 PA JELL 0 009 -6-
    As can be seen in particular in FIG. 2, only one shell 7 surrounds the lower half of the workpiece 6, so that a comparatively wide radial bearing surface 18 can be formed. The shell 7 is almost formed for this purpose as a half shell. In general, however, any design is conceivable - only the function of a radial bearing must meet the shell 7 through its hydrostatic Lagerstelien 9,10, 11, 12 and 13.
    The shell 7 further has two edge-side hydrostatic bearing points 11 and 13 and a plurality of hydrostatic bearing points 9, 10 and 12 disposed therebetween, whereby a particularly balanced and stable support can be ensured. In addition, with a comparatively large number of bearing pockets 9 ', 10', 11 ', 12' and 13 'in a simple manner a continuous radial bearing surface 18 can be ensured.
    Since the actuators 14 'and 15' engage the outer tray positions 19 and 20, an improved positionability of the tray 7 can be made possible. To compensate for a wide variety of angular positions, the actuators 14 'and 15' via pivot bearings 21 and 22 attached to the shell 7.
    As can be seen in FIGS. 3 and 4, the shell 7 also has return channels 23 with which bearing liquid 24 can be removed from the hydrostatic radial bearing 18 of the shell 7. The Rückführkanäie 23 are preferably arranged on the edge, in order to reduce leakage of storage fluid 24 from the Radiailager 18 can. The storage liquid 24 is introduced via respective feed channels 25 into the bearing pockets 9 ', 10', 11 ', 12' and 13 '.
    In addition, an edge-side groove 26 for driving in blocking air 27 is provided to reduce leakage to bearing liquid 24. The sealing air 27 is supplied through a compressed air line 28 of the groove 26. Based on this sealing air 27, a peripheral seal 29 can be created. 22/09 2010 MI 10:17 [SE / EM NR 5478] IS 009 22/09 2010 19:20 FAX 0761263884 PA JELL 0010 • · «· · - 7 -
    Aiternativ can also be another seal 29 are provided, as has been indicated by dash-dotted lines in Fig, 4 on the opposite side of the shell 7. For example, it is conceivable to introduce an O-ring 30 or a felt, not shown, into the edge-side groove 26 instead of the locking air 27.
    Such measures are comparatively easy to perform on the shell 7 according to the invention, because only one and compared to the prior art comparatively large shell 7 is available. The invention can therefore be characterized in particular by the fact that the steady rest 1 can ensure stable storage even in comparatively heavily loaded environments, as may exist in machine tools 5. The risk of contamination of the storage liquid 24 can namely be significantly reduced by the particularly simple provision of a seal 29.
    According to Fig. 5, for example, another embodiment is shown. In contrast to the embodiment illustrated in FIG. 1, a shell 31 with a different positioning device 8 is shown here. Here, the shell 31 is arranged linearly displaceable on a pivotally mounted actuator 32. For this pivotal mounting a pivot bearing 33 is provided between the actuator 32 and the support 2 of the bezel 1, wherein the pivotal position 34 of the actuator 32 via an actuator 35, which is actuated via the crank drive 16, can be changed. The shell 31 is further mounted linearly adjustable via an adjustable along an adjustment axis 36 actuator 37, so as to provide the second Versteliachse 35. The actuator 37 is provided embedded here in the actuator 32, which has not been shown in detail. For example, this can be made possible by means of a worm, which creates a linear adjustment of the shell 7 relative to the actuator 32 via a crank drive 17. In addition, one in the pockets opposite the shell 7 of FIG. 1 differently listed shell 31 is shown. Thus, the shell 31 only two hydrostatic bearing points 11 and 12. Again, the hydrostatic bearing points 11 and 12 are provided on the shell 31 such that thus forms a bearing surface 18 for the workpiece 6 in order to support the workpiece 6 radially. The shell 31 or 7 is therefore on the workpiece 6 for forming a radial workpiece support 22/09 2010 MI 19:17 [SE / EM NR 5478] @ 010 22/09 20ΙΌ 19:21 FAX 0761263884 PA JELL © 011 - 8 with the help of hydrostatic bearings 11, 13 and 9, 10, 11, 12 and 13 anstelibar. The run as a channel return channel 23, the bearings 11 and 13 arranged circumferentially. The return channel 23 encircling the groove 26 is further provided for driving sealing air 27 to reduce the leakage of storage fluid 24. Based on this sealing air 27, a peripheral seal 29 can be created here again. Alternatively, or in addition, any other seal 29 is conceivable, for example, an unillustrated O-ring 30, etc., which seals 29 may be used, for example, in the groove 26. It need not be further mentioned that in the embodiment of FIG. 1 instead of the shell 7, the shell 31 and in the embodiment of FIG. 5 instead of the shell 31, the shell 7 can be used.
    In addition, the embodiments of Figures 1 and 5 may have a further support on the upper workpiece half. This support can be provided again with a shell 38, which can be positioned via a linear actuator 39 relative to the workpiece 7. For adjustment purposes, a crank drive 40 can also be provided here, for example. 22/09 2010 MI 19:17 [SE / EM NR 5478] 0011
    权利要求:
    Claims (3)
    [1]
    22/09 2010 19:21 FAX 0701263884 PA JELL @ 012 I I t I

    Patent Attorney Dipl-Ing. Friedrich Jell Hittmairstrasse 11, A-4020 Linz (00006 PAT) Claims: 1. Lunette for supporting a workpiece (6) of a machine tool (5) with a carrier (2) for preferential mounting on the machine bed (4) of the machine tool (5) , with at least one shell (7), which has at least one hydrostatic bearing parts (9) for the workpiece (6), and with a positioning device (8) provided between the support (2) and the shell (7), the at least one adjustment axis (14) for setting the shell (7) to the workpiece (6), characterized in that on the one hand the shell (7) at least two spaced-apart hydrostatic bearing points (9, 10, 11, 12, 13) and on the other hand the positioning device ( 8) have at least two mutually inclined VersteHachsen (14 and 15), wherein on the positioning device (8) the shell (7) to the workpiece (6) for forming a radial Werkstückab-support with the aid of hydr ostatische bearings (9, 10, 11, 12, 13) is adjustable. Second bezel according to claim 1, characterized in that only one shell (7) substantially encloses the lower workpiece half of the workpiece (6). 3. bezel according to claim 1 or 2, characterized in that along the edge of the shell (7), a seal (29) is provided extending. 4. bezel according to claim 1, 2 or 3, characterized in that the hydrostatic bearing points (9, 10, 11, 12, 13) of the shell (7) form a continuous radial bearing surface (18). 22/09 2010 MI 19:17 [SE / EMNR 5478] @ 012 22/09 2010 19:21 FAX 0761263884 PA JELL®013 -2- 5. steady rest according to one of claims 1 to 4, characterized in that the shell ( 7) has two edge-side bearing points (11, 13) and at least one central hydrostatic bearing point (9). 6. bezel according to one of claims 1 to 5, characterized in that the shell (7) on the carrier (2) is mounted partially tiltable according to the workpiece axis. 7. steady rest according to one of claims 1 to 6, characterized in that the positioning device (8) has two linear along an adjustment axis (14, 15) adjustable actuators (14 ', 15') which at different shell positions (19, 20) attack. 8. bezel according to one of claims 1 to 6, characterized in that the positioning device (8) has a linear along an adjustment axis (35) adjustable actuator (36) and further about a pivot axis (33) pivotally mounted actuator (32).
    [2]
    9. Machine tool with a workpiece clamping device for fastening a workpiece (6) and with a steady rest (1) according to one of claims 1 to 8 for supporting the clamped workpiece (6).
    [3]
    10. Use of a shell (7) with at least two spaced apart hydrostatic bearing points (9, 10, 11, 12, 13), which have a common bearing axis, to provide a radial support (18) of a in a machine tool (5). clamped workpiece (6). Linz, September 22, 2010 WFL Millturn Technologies GmbH & Co. KG by:

    22/09 2010 MI 19:17 [SE / EM NR 5478] ®013
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    引用文献:
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    GB1296084A|1969-02-08|1972-11-15|
    SU666034A1|1978-01-05|1979-06-08|Краматорский Ордена Трудового Красного Знамени Завод Тяжелого Станкостроения Им. В.Я.Чубаря|Hydrostatic rest|
    SU755493A1|1978-12-18|1980-08-25|Kramatorsk Z Tyazhelogo|Hydrostatic rest|
    US4276723A|1979-10-09|1981-07-07|The Warner & Swasey Company|Compensating steadyrest|
    DE3909411A1|1989-03-22|1990-09-27|Heyligenstaedt Gmbh & Co Kg|Tandem steadyrest|
    IT1390910B1|2008-07-17|2011-10-19|Ansaldo Energia Spa|MOUNTING WITH HYDROSTATIC SUPPORT FOR A LATHE, AND A METHOD OF CHECKING THE TEMPERATURE OF A WORKING PIECE ON THE LATHE|EP2781301A1|2013-03-20|2014-09-24|Rollomatic S.A.|Device for centring workpieces|
    CN103203477B|2013-05-05|2015-07-08|齐重数控装备股份有限公司|Installation method of high-accuracy positioning device for large-component interconversion|
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    法律状态:
    2017-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20160922 |
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    EP20110182319| EP2433742B1|2010-09-22|2011-09-22|Rest for hydrostatically supporting a workpiece of a machine tool|
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