• 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:
    In a device for machining workpieces, in particular for grinding spindles, wherein the workpiece is associated with a tailstock (1) with a centering tip, which is arranged in a stationary housing (2), the workpiece in front of the centering a feed ring (6) be assigned, which aligns the workpiece relative to the centering.
    公开号:CH710297A2
    申请号:CH00506/15
    申请日:2015-04-13
    公开日:2016-04-29
    发明作者:Mayer Klaus
    申请人:Somatec Inh : Klaus Mayer；
    IPC主号:
    专利说明:

    The invention relates to a device for machining workpieces, in particular for grinding spindles, wherein the workpiece is assigned a tailstock with a centering tip, which is arranged in a stationary housing.
    State of the art
    Such devices are known in a variety of forms and designs and on the market. They are used for machining any workpieces and in particular for internal or external grinding of spindles. The present invention mainly relates to the manufacture or machining of spindles, but should not be so limited.
    Such a grinding method and a corresponding processing machine for wave-shaped workpieces is shown for example in DE 10 2009 013 050 A1. This device consists essentially of a workpiece spindle and a tailstock, wherein the workpiece spindle is movable along first guides. It has a grinding spindle with an internal grinding body, a grinding headstock with a grinding wheel for external grinding, in which case the grinding headstock and the grinding spindle are each movable via vertical slide and horizontal slide in the vertical and horizontal directions. For external grinding, the workpiece is clamped between the workpiece spindle and the tailstock, moved away from the inner guide along the first guide to the tailstock.
    A major difficulty with such processing machines is the centering of the workpiece. In particular, when spindles are to be ground, they must be machined with the utmost accuracy, since they run at high speeds and any imbalance means a considerable stress on the machine and a shortening of the service life. Even a slight inaccuracy leads to this imbalance on the tool and thus to a one-sided wear on the tool associated with low tool life, poor surface and high reject rates.
    task
    The object of the present invention is to facilitate the clamping and centering of the workpieces, in particular of spindles in general and in particular of spindles for machine tools, and to improve.
    Solution of the task
    To achieve the object, that the workpiece in front of the centering a feed ring is assigned, which aligns the workpiece relative to the centering.
    For a highest accuracy of the alignment of the workpiece is achieved at the same time facilitated Aufspannvorgang. The housing in which the centering tip is, is used as a solid reference, since the feed ring is preferably moved axially guided in the housing. Thus, it is sufficient if the feeder ring is once aligned with respect to the housing in its position. This alignment can then be transferred to each subsequent workpiece to be machined.
    In one embodiment, a connection between the feed ring the housing is ensured by a stamp. Of course, several stamps are of course provided, three stamps probably suffice. Each of these stamps is at least partially disposed in a guide bore or corresponding housing recess in the housing. In this case, a stamp in the preferred embodiment consists of two parts which are detachably connected together to facilitate assembly. A protruding from the guide hole centering part also penetrates the feeder ring with a fitting head and acts there for centering with the feeder ring with a fitting receptacle. For the sake of simplicity, the fitting head and the fitting receptacle are conically shaped. That's the easiest way to find your fit.
    However, the invention provides that the mating receptacle is not only easy in the feed ring, but that here the entry ring bayonet hooks are formed in which the mating receptacle is and with which the feed ring can engage under the mating head. This makes it possible that the feed ring first pushed the workpiece, performed together with this workpiece against the housing and then the punch can be caught by rotating the feed ring. This also facilitates insertion of the workpiece.
    The other part of the stamp is located for the most part in the housing recess and is supported there against a force storage, so that the centering part is pulled towards the housing. The energy storage can then be a simple coil spring, to the support of the rod forms a piston head. Again, other natural possibilities are conceivable, even a hydraulic or pneumatic support.
    In addition to this centering a further centering ring is provided in a preferred embodiment of the invention, which is also guided axially in the housing. For this purpose, from the centering piston rods, preferably three piston rods distributed by 120 °, from, which are also guided in housing recesses. This guidance can be done with or without pressurization, as desired. Preferably, a pressurization is provided, which makes it possible to extend the piston rod from the housing and thereby shift the centering towards the housing.
    However, it is also provided that the centering ring is penetrated by the centering part of the punch, which or which connect the feeder ring with the housing. In the region of this throughput, the centering ring again has a fitting receptacle, preferably a cone receptacle, which can interact with a corresponding fit on the centering part, in particular a cone. This ensures that the centering of the punch again aligned with respect to the housing in which the centering is, and this orientation is also still supported. This orientation is then transferred via the centering on the feed ring.
    figure description
    Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows in<Tb> FIG. 1 <SEP> a side view of a device according to the invention for machining workpieces;<Tb> FIG. 2 <SEP> is a top view of the device according to FIG. 1;<Tb> FIG. 3 to 5 <SEP> sectional views of a detail of Figure 2 taken along line A-A in different operating positions.<Tb> FIG. 6 to 8 <SEP> sectional views of a detail of Figure 2 along line B-B in different operating positions.
    According to FIGS. 1 and 2, a part of a tailstock 1 is shown by an apparatus according to the invention for machining workpieces 24. This has a stationary housing 2, which surrounds an opening 3, in which a Zentnerspitze 4 is arranged, which is located in the center of the opening 3.
    The housing 2 is a centering ring 5 and this a feed ring 6 vorsetzt. In this case, three piston rods 7.1 to 7.3 are arranged on the centering ring 5, wherein each piston rod, as shown for the piston rod 7.1 in FIGS. 6 to 8, is guided in the housing recess 8.
    The pull-in ring 6 itself has an inner ring 9, whose width is variable and the offset by 120 ° three bayonet 10.1 to 10.3 are assigned. Each of these bayonet hooks forms, as shown in FIGS. 3 to 5 for the bayonet hook 10.1, a cone seat 11, which serves to receive a cone 12.1, 12.2, 12.3. This cone 12.1, 12.2, 12.3 is part of a centering part 13, which forms a punch 15 together with a guide part 14. In this case, centering part 13 and guide part 14 are releasably connected to each other, for example screwed together. In the region of the connection, the punch 15 passes through the centering ring 5, wherein this in turn forms a cone seat 16 which cooperates with a further cone 17, wherein the cone 17 is arranged on the centering part 13 of the cone 12.1, 12.2, 12.3.
    The guide member 14 has a stepped rod 18 to which a piston head 19 in a housing recess or housing bore 20 connects. Between a bottom 21 of the housing bore 20 and the piston head 19 is a coil spring 22 (shown only in Fig. 5) provided as a force storage.
    The operation of the present invention is as follows:
    By pressurizing a connection x, the piston rods 7.1-7.3 extend in the axial direction. In this case, the rod 18 is taken against the pressure of the coil spring 22 and aligned by means of the cone 17 in the centering ring 5 axially and radially. This alignment facilitates the clamping and clamping of the workpiece 24 during grinding by means of the pull-in ring 6 and the bayonet hook 10.1-10.3.
    A workpiece to be machined 24 is inserted into the tailstock 1 and thereby surrounded by the feed ring 6. After clamping the new workpiece 24, the connection x is vented again, so that the coil springs 22 come into effect. About the respective rod 18, the second cone 12.1-12.3 is tightened and aligned in the bayonet 10.1-10.3 axially and radially. The pull-in ring 6 guides the workpiece 24 centered against the centering tip 4 in the opening 3. In this case, the workpiece 24 is adjusted exactly opposite the centering tip 4 and aligned axially and radially. This is done by the feed ring 6 itself or by the interaction of the cone 12.1, 12.2, 12.3 of the centering part 13 with the cone holder 11 and the centering 4 itself. In order to transmit any concentricity inaccuracies on the workpiece 24, it is necessary that the cone 17 can release again from the centering ring 5 and thus the rod 18, which also serves for the rotational force transmission to the workpiece 24, is aligned only after the bayonet hook 10.1-10.3.
    The design of the pull-in ring with the bayonet hooks 10 has the advantage that the pull-in ring 6 is not already firmly connected to the other parts of the tailstock 1 or in particular the centering parts 13 at the beginning of assembly, but the workpiece 24, e.g. a spindle, can be postponed, this then leads against the centering and by turning the retraction ring 6 the respective cone 12.1, 12.2, 12.3 with the bayonet hooks 10.1 to 10.3 under attack and so can catch. This gives a considerable freedom in the assembly.
    3 and 6, a largely distance between the housing 2, centering ring 5 and retraction ring 6 is shown, wherein the coil spring 22 is completely compressed. It can be seen that the cone 12.1 sits in the cone seat 11, while the cone 17 is lifted off its seat 16.
    The other stages of retraction of the workpiece 24 in the housing 2 against the center 4 are shown in Figs. 4 and 5 and 7 and 8 respectively. Although it is shown that the cone 17 is still removed from the cone seat 16, it is preferred that it is drawn in the course of this movement in the cone seat 16 and so the entire elements centered when clamping or against each other.
    LIST OF REFERENCE NUMBERS
    [0024]<Tb> 1 <September> tailstock<Tb> 2 <September> Housing<Tb> 3 <September> opening<Tb> 4 <September> centering<Tb> 5 <September> centering<Tb> 6 <September> feeder ring<Tb> 7 <September> piston rod<Tb> 8 <September> housing recess<Tb> 9 <September> inner ring<Tb> 10 <September> bayonet hooks<Tb> 11 <September> cone holder<Tb> 12.1,12.2,3.12 <September> cone<Tb> 13 <September> centering<Tb> 14 <September> guide part<Tb> 15 <September> stamp<Tb> 16 <September> cone holder<Tb> 17 <September> cone<Tb> 18 <September> Bar<Tb> 19 <September> piston head<Tb> 20 <September> guide bore<Tb> 21 <September> Floor<Tb> 22 <September> coil spring<Tb> 23 <September><Tb> 24 <September> workpiece<Tb> <September><Tb> x <September> Connection
    权利要求:
    Claims (15)
    [1]
    1. Apparatus for machining workpieces (24), in particular for grinding spindles, wherein the workpiece (24) is associated with a tailstock (1) with a centering tip (4), which is arranged in a stationary housing (2), characterized .in that a pull-in ring (6) is associated with the workpiece (24) in front of the centering tip (4), which aligns the workpiece (24) with respect to the centering tip (4).
    [2]
    2. Apparatus according to claim 1, characterized in that the feed ring (6) is guided axially movable in the housing (2).
    [3]
    3. A device according to claim 2, characterized in that for guiding the pull-in ring (6) at least one, preferably three or more punches (15) is provided / at least partially into a guide bore (20) in the housing (2 ) intervenes.
    [4]
    4. Apparatus according to claim 3, characterized in that at least one punch (15) consists of one or more parts (13, 14).
    [5]
    5. Apparatus according to claim 4, characterized in that in these cases, the parts (13, 14) are detachably connected to each other.
    [6]
    6. Apparatus according to claim 4 or 5, characterized in that a centering part (13) has a fitting head which sits in a fitting receptacle in the feed ring (6).
    [7]
    7. The device according to claim 6, characterized in that the fitting head is a cone (12.1, 12.2, 12.3), which sits in a cone receptacle (11) or any other form for centering in the feed ring (6).
    [8]
    8. Apparatus according to claim 6 or 7, characterized in that the fitting receptacle is formed by a bayonet hook (10.1-10.2), which protrudes from an inner ring (9) of the feed ring (6).
    [9]
    9. Device according to at least one of claims 4 to 8, characterized in that the other part as a guide part (14) is a rod (18) with a piston head (19) which slides in a guide bore (20).
    [10]
    10. The device according to at least one of the preceding claims, characterized in that the feed ring (6) is supported against a force accumulator.
    [11]
    11. The device according to claim 10, characterized in that the energy storage, for example, a coil spring (22).
    [12]
    12. The apparatus according to claim 11, characterized in that the coil spring (22) in the guide bore (20) against the piston head (19) is supported.
    [13]
    13. The device according to at least one of the preceding claims, characterized in that between the housing (2) and the feed ring (6) a centering ring (5) is provided.
    [14]
    14. The apparatus according to claim 13, characterized in that the centering ring (5) via at least one piston rod (7) in a housing recess (8) is guided.
    [15]
    15. The apparatus of claim 13 or 14, characterized in that the centering ring (5) with a further fitting receptacle (11) engages under a further fit (12.1, 12.2, 12.3) on the centering part (13).
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE102014115175A1|2015-03-12|
    CH710297B1|2020-06-15|
    DE102015102978A1|2016-04-21|
    DE102015102978B4|2017-08-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4327807C2|1993-08-18|1995-06-14|Erwin Junker|Method and grinding machine for grinding a crankshaft|
    DE102009013050A1|2009-03-16|2010-11-25|Emag Holding Gmbh|Method for processing workpieces, involves extending workpiece spindle in vertical direction along guidance, where grinding spindle is provided with inner grinding body|CN106001633B|2016-07-29|2018-09-04|三星智能科技盐城有限公司|A kind of numerically controlled lathe tailstock autocontrol method|
    CN106041136B|2016-07-29|2018-06-01|东阳市金陵机械有限公司|It is a kind of with cylinder driving can rigid tapping numerically controlled lathe tailstock autocontrol method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014115175.5A|DE102014115175A1|2014-10-17|2014-10-17|Device for processing workpieces|
    DE102015102978.2A|DE102015102978B4|2014-10-17|2015-03-02|Device for processing workpieces|
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