• 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 an apparatus for aligning a workpiece in a balancing centering device, it is provided that in an initial position, an upper flange (1) and a lower flange (2) are arranged concentrically about an axis (3) of a balancing spindle of the balancing centering device, the upper flange (1 j) an interface (4) for clamping means for clamping the workpiece, and the lower flange (2) comprises a fastening means interface (5) for fixing the device to the balancing spindle the upper flange (1) in the basic position is supported axially and radially exclusively on the two spring elements (22, 23). 22, 23) are moved in an eccentric position relative to the lower flange (2) relative to the lower flange (2) spring (9) and a piston (13) is arranged between the upper and the lower flange (1,2), that in a clamping position of the piston (13) by spring force of the compression spring (9) for engagement with a support element ( 20) of a fastening element (21) of the upper flange (1) can be brought, so that the upper flange (1) by the piston (13) against the lower flange (2) is clamped in the eccentric position lockable.
    公开号:CH711374A2
    申请号:CH00931/16
    申请日:2016-07-20
    公开日:2017-01-31
    发明作者:Breitwieser Matthias
    申请人:Schenck Rotec Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for aligning a workpiece in a Wuchtzentriervorrichtung, having an upper and a lower flange, which are arranged concentrically in an initial position about an axis of a balancing spindle of the balancing centering device, wherein the upper flange an interface for clamping means for clamping the Workpiece and the lower flange has an interface for fastening means for fixing the device to the balancing spindle.
    Measuring the position of the inertia axis of a workpiece intended for rotation or machine part is used in the so-called balancing or mass centering. Here, the workpiece is received in a predetermined by its geometric shape initial position in a machine and rotated about the given rotation axis. As the workpiece rotates, the existing imbalance is measured and the position of the mass inertia axis of the workpiece relative to the given axis of rotation is determined. In a further step, the bearing of the workpiece is then changed so that the given axis of rotation and the inertia axis coincide. In this position, centering holes or similar centering means are then attached to the workpiece, which serve to receive the workpiece in the subsequent machining processes.
    From DE 10 2007 018 618 A1 discloses the structure of an exhaust gas turbocharger is known, which is composed essentially of a radial turbine with a turbine wheel and a compressor with a compressor wheel which is rotatably connected by a shaft to the turbine wheel. A problem with the balancing of turbochargers is that the turbine wheel is often provided with a pre-cast center and consequently the centering must take place in this center. The introduction of the centering with a drill often leads to deviations from a target position to be achieved. Alternatively, the centering can also be introduced by means of a grinding spindle.
    The invention has for its object to provide a device for aligning a workpiece, with which the workpiece can be aligned as accurately as possible in a Wuchtzentriermaschine.
    The object is achieved according to the invention in that a device for aligning a workpiece is provided in a Wuchtzentriervorrichtung, with an upper and a lower flange, which are arranged in a basic position concentrically about an axis of a balancing spindle of the balancing centering device, wherein the upper flange an interface for clamping means for clamping the workpiece and the lower flange comprises an interface for fastening means for fixing the device to the balancing spindle, wherein at least two spring elements are arranged between the upper and the lower flange, that the upper flange in the basic position axially and radially exclusively supported on the two spring elements and that the upper flange in the basic position with the spring elements opposing force is movable relative to the lower flange in an eccentric position, wherein a compression spring and a piston umfa Ssende displacement device is disposed between the upper and the lower flange, by means of which the upper flange is controlled by the piston axially movable into a clamping position in which it is clamped to the lower flange fitting. Advantageously, in the clamping position, the piston can be brought by spring force of the compression spring to rest against a support element of a fastening element of the upper flange, so that the upper flange can be clamped by the piston against the lower flange and locked in the eccentric position.
    The inventive design of the device, the upper flange is resiliently mounted in the basic position, since it is supported in the axial and radial direction exclusively on the spring elements. In the home position, movement of the upper flange relative to the lower flange is possible. In this way, the workpiece receiving upper flange can be aligned after a successful imbalance measurement of the workpiece such that a calculated and the imbalance of the workpiece into account mass inertia axis is coaxial to the axis and a centering means of a centering, such as a drill or a grinding spindle, can be introduced into the workpiece. After displacement of the upper flange of this and thus the workpiece is brought into the clamping position in which a movement of the upper flange is no longer possible. In the clamping position, the upper flange frictionally engages the lower flange.
    By the resilient mounting of the upper flange of this can be substantially frictionless, that is without Stickslip effect, moved. In this regard, it is advantageous that the spring elements are designed meander-shaped, since they have a high tensile and compressive strength and thus ensures that the upper flange of a force acting on it follows the displacement of the upper flange in the tensile and compressive direction.
    It is proposed that the spring elements comprise an upper and a lower spring element and the upper spring element between the fastening element of the upper flange and a holding element of the lower flange and the lower spring element between a free end of the fastening element and the lower flange is braced. Due to the arrangement of the spring elements, the upper flange is resiliently mounted on one hand and movable in defined areas to the lower flange. On the other hand, the spring elements are designed so that even at maximum load nor a sufficient minimum distance between the upper and lower flange and the upper flange does not come to frictional engagement with the lower flange in the basic position. Depending on the geometric configuration of the upper flange, it may be advantageous to use more than two spring elements. The spring force and configuration of the spring elements can be adapted in particular to the male workpiece.
    It is also proposed that the distance of the upper flange to the lower flange with the displacement device is variable and the upper flange can be brought with a contact surface for frictional engagement with a bearing surface of the lower flange. The spring elements are advantageously designed such that under maximum load of the upper flange there is a minimum gap between the contact surface of the upper flange and the bearing surface of the lower flange. As a result, the mobility of the upper flange is ensured even at maximum load. The displacement device can be arranged in particular by means of fastening means on the lower flange.
    In a preferred embodiment, the lower flange has at least one air duct and a connected thereto air inlet valve, wherein the air duct is arranged such that by blowing compressed air into the air inlet valve, an effective surface of the piston can be acted upon with pressure and the piston against the spring force of the compression spring from the system is movable on the support element of the fastening element, so that the device from the clamping position can be brought into the basic position. Compressed air is injected into the air duct or the air ducts via the air inlet valve. The air channel opens at the effective surface of the piston, so that the piston is pressurized and the spring is tensioned. If the compressed air is released from the air duct and consequently the pressure on the piston is reduced, the compression spring relaxes and presses the piston against the support element, so that the upper flange is moved against the lower flange. In this regard, it is advantageous if the spring force of the compression spring is greater than the spring force of the spring elements. As a result, the spring elements are tensioned as soon as the compressed air escapes from the air channel and presses the compression spring on the piston.
    In order to discharge the compressed air present in the air duct, the air duct in particular has at least one air outlet opening, which is closed by a closure means. The closure means may be, for example, a plug or a controllable valve. The air duct of the device according to the invention can also be connected to a pneumatic system of the balancing machine, via which controllably compressed air can be introduced into the air duct and removed therefrom.
    In order to move the position of the upper flange with respect to the lower flange, it is provided in a further advantageous embodiment, that the upper flange in the normal position by means of a positioning device which acts radially to the axis centered on the upper flange, against the Spring force of the spring elements is movable in a direction perpendicular to the axis of the vertical plane. Characterized in that the positioning device acts centrally between the upper and the lower spring element, a tilting of the upper flange is prevented.
    It is proposed that the upper flange is designed cup-shaped. The preferred embodiment of the upper flange results in a clearance between the upper and lower flange, which is available for receiving the displacement device. In addition, so the upper flange can be brought in spite of a great deal of flexibility in a structurally simple way to rest on the lower flange.
    The invention will be explained in more detail with reference to an embodiment of the invention, which is shown in the drawing.
    The drawing shows a half-side view of an embodiment of a device for aligning a workpiece, in particular a turbine wheel of a turbocharger, in a balancing centering device. The device consists essentially of an upper flange 1 and a lower flange 2, which are arranged in a basic position concentrically about an axis 3 of a balancing spindle, not shown, of the balancing centering device. The upper flange 1 has an interface 4 for clamping means, with which a bearing part of a workpiece, not shown, can be clamped, and the lower flange 2 has an interface 5 for fastening means for fixing the device to the balancing spindle. The tensioning means can be attached to the upper flange 1 with corresponding fastening means. The interface 4 for clamping means may have corresponding receiving means, such as holes.
    The upper flange 1 is cup-shaped, wherein the side wall 6 of the upper flange 1 extends parallel to the axis 3, so that within the upper flange 1, more precisely between the axis 3 and side wall 6, there is a free space in the axial direction Opening has. The lower flange 2 fits to the opening and penetrates into the space formed by the upper flange 1. An axially movable push rod 7 coming from the balancing spindle is guided on the lower flange 2 and serves as a mechanical actuation of a release mechanism of the tensioning means. The actuation of the push rod 7 can take place with a concentric to the spindle axis 3 arranged expansion cylinder, which can be installed below the spindle. The push rod 7 may also have at its free end 8 a thread that can be used for disassembly of the push rod 7.
    On the lower flange 2, a displacement device is fixed by means of fastening means which is arranged in the space formed by the upper flange 1. The displacement device comprises a concentric with the axis 3 of the balancing spindle oriented compression spring 9, which is arranged around a central, extending around the axis 3 holding member 10. The holding element 10 has a through hole 11 and is fixed, for example with a screw on the lower flange 2. The compression spring 9 is supported on the one hand on a shoulder of the holding element 10 and on the other at one end 12 of a movable piston 13 from. The piston 13 extends concentrically around the holding element 10, wherein the first end 12 of the piston 13 with the holding element 10 forms a bulge into which the compression spring 9 inserts.
    The piston 13 is constructed in steps and forms with a central region an active surface 14, which is arranged at a distance to a guide element 15 of the lower flange 2. The piston 13 is axially displaceable relative to the guide element 15, so that the distance between the active surface 14 and the guide element 15 can be reduced or increased. The displaceability of the piston 13 in the axial direction is limited on the one hand by a stop of the first end 12 of the piston 13 at a shoulder of the holding element 10 and on the other by the abutment of the active surface 14 on the guide element 15. With a region extending parallel to the axis 3, the piston 13 rests against the guide element 15, so that radial movability of the piston 13 is essentially precluded. In this area, there are also two seals 16, for example as sealing rings, which are received in corresponding grooves of the piston 13.
    The guide element 15 also has at least one air channel 17 or more air channels 17, the outlet surfaces perpendicular to the active surface 14 of the piston 13 open. In one of the Wirkflächel4 opposite direction, the guide member 15 is supported on two seals 16 which are received in a recess of the lower flange and prevent leakage of air from the air duct. The air channels 17 in the guide member 15 are pneumatically connected to the lower flange 2 radially extending and opening on the push rod 8 air channels 17. The air channels 17 have at least one air outlet opening 18, which is closed by a closure means. The closure means may be formed, for example, as a plug or valve.
    A second end 19 of the piston 13, which is configured for example as a driver, is spaced from a support element 20 of a ring-shaped and parallel to the side wall 6 extending fastener 21 of the upper flange 1 is arranged. The support element 20 may be formed as a shoulder or depression of the fastening element 21. The fastening element 21 is fixed by a fastening means on the upper flange 1 and protrudes between guide element 15 and side wall 6 into the space bordered by the upper flange 1.
    The fastening element 21 also serves to clamp two spring elements, namely an upper spring element 22 and a lower spring element 23. The upper spring element 22 is connected to a first end 24 at the base of the fastening element 21 above the support element 20 and with a second end of the 25th clamped on the holding element 10 above the compression spring 9. The lower spring element 23 is clamped with a first end 26 at the free end of the fastening element and with a second end 27 on the lower flange 2. The clamping of the spring elements 22, 23 can be done by means of screws. The spring elements 22, 23 are designed as meander-shaped springs, wherein other resilient elements or otherwise configured springs can be used.
    The inventive device is firmly connected by means of attachable to the interface 5 of the lower flange 2 fastener with the balancing spindle.
    The workpiece or a bearing part of the workpiece is stretched over the arranged on the upper flange 1 interface 4 for clamping means on the device. The workpiece may be, for example, a turbine wheel of a turbocharger.
    In a basic position, the upper flange 1 is concentrically aligned with the lower flange 2 and is supported in the axial and radial direction exclusively on the two spring elements 22, 23, so that the upper flange 1 is resiliently mounted in the basic position and by a counter to the spring forces of the spring elements 22, 23 acting force is movable in an eccentric position. Due to the elastic properties of the spring elements 22, 23, the upper flange returns to the concentric position as soon as the applied force has subsided. The force on the upper flange 1 is exerted by a positioning device, not shown, which acts radially to the axis 3 in the middle of the upper flange 1. The positioning device causes the upper flange 1 is movable against the spring force of the spring elements 22, 23 in a direction perpendicular to the axis 3 vertical plane. The positioning device engages a region of the upper flange 1, which is referred to in the context of the invention as spring center 28 and in a direction perpendicular to the axis 3 and centrally located between the upper and lower spring element 22, 23 level. The spring center point 28 has the same distance to the upper spring element 22 and to the lower spring element 23. As a result, the upper flange 1 can be moved without tilting in an eccentric position.
    The workpiece is fastened in the basic position to the upper flange 1. Optionally, vibrations occur as soon as the fixed coupling reached in the clamping position between lower flange 2 and upper flange 1 is released and the upper flange 1 springs back from an eccentric position to the basic position. The required decay time can be determined experimentally. Optionally, the amplitude of the free vibration can be measured with a position transducer. With a sufficiently small amplitude, the clamping of the upper flange 1 is released, or actuated automatically. As soon as the oscillations of the spring elements 22, 23 have subsided, the concentric alignment assumed by the upper flange 1 with respect to the lower flange 2 is arrested by evacuating compressed air present in the air channels 17. This can be done, for example, by removing a closure means from an air outlet opening 18 and thus escaping the compressed air in the air channels. However, the compressed air can also be introduced via at least one present in the push rod 8 and pneumatically connected to a pneumatic system of the balancing machine air duct 17 in the device and also led out of this. The device can be vented via the air channel 17 in the push rod 8, for example by means of a coupled valve. A regulation and control of the pneumatic system and thus also the compressed air can be done via the control of the balancing machine. The positioning device can be controlled via this.
    Characterized in that the compressed air is removed from the device and the spring force of the compression spring 9 is greater than the spring force of the spring elements 22, 23, now the spring force of the compression spring 9 acts on the first end 12 of the piston 13, so that its Active surface 14 approaches the guide member 15 and also the second end 19 of the piston 13 or mounted on the second end 19 driver comes to rest on the support member 20 of the fastener 21 of the upper flange 1. The piston 13 presses the fastening element 21 and consequently the upper flange 1 in the axial direction against the lower flange 2, wherein in turn a contact surface 29 at the free end of the upper flange 1, more precisely the side wall 6, for frictional engagement with a support surface 30 of the lower flange 2 brought and the upper flange 1 is moved from the basic position to a clamping position. About the contact surface between the contact surface 29 of the upper flange 1 and the support surface 30 of the lower flange 2, a sufficiently large frictional torque is transmitted, so that the upper flange 1 in the clamping position is not movable relative to the lower flange 2. In this position, a first unbalance measuring run takes place to determine the imbalance of the workpiece.
    Using the measured imbalance, the eccentricity of the workpiece can be calculated and thus the position of the mass inertia axis of the workpiece with respect to the given axis of rotation can be determined. In order that the inertia axis of the workpiece may be set with respect to the measured eccentricity and the given axis of rotation and the inertia axis coincide, it may be necessary to change the orientation of the workpiece in the balance centering device. For this purpose, 17 compressed air is blown over arranged in the push rod 8 and connected to the pneumatic system of the balancing machine air channels. The one or more air channels 17 in the push rod 8 are pneumatically connected to the air channels 17 in the lower flange 2, wherein in grooves of the lower flange 2 inserted and applied to the push rod 8 seals 16 prevent escape of compressed air. The compressed air flows from the air channels 17 in the lower flange 2 in the air channels 17 of the guide member 15, so that the active surface 14 of the piston 13 is pressurized and the piston 13 is lifted against the spring force of the compression spring 9 of the support member 20 and the Upper flange 1 passes from the clamping position to the basic position. The spring elements 22, 23 are designed such that under maximum load of the upper flange 1, that is also in the attachment of the workpiece to the upper flange 1, a minimum gap 31 between the contact surface 29 of the upper flange 1 and the support surface 30 of the lower flange 2 exists.
    In the basic position, the upper flange 1 is resiliently mounted and movable with the fixed to this workpiece in the plane extending to the axis 3 vertical plane. The upper flange 1 can be moved from its concentric position to an eccentric position by means of the positioning device. As soon as the upper flange 1 has been displaced by the positioning device exerting a force on the spring center 28 in accordance with the measured eccentricity and its position is to be locked, the compressed air is evacuated from the air channels 17. Due to the omission of acting on the active surface 14 of the piston 13 and the spring force of the compression spring 9 counteracting counterforce, the upper flange 1 is brought by the piston 13 in the clamping position and fixed the eccentric position of the upper flange 1. The calculated and possibly deviating from the axis of rotation of the workpiece mass inertia can now be determined by the introduction of a centering. The centering can be introduced by means of a drill or a grinding spindle. If the centering with an eccentrically arranged stationary grinding spindle with rotating workpiece introduced, the center of the center is always exactly concentric to the axis of rotation and the roundness of the center is optimal.
    权利要求:
    Claims (12)
    [1]
    Anspruch [en] A device for aligning a workpiece in a balance centering device, comprising upper and lower flanges (1,2) arranged concentrically about an axis (3) of a balance spindle of the balance centering device in a home position, the upper flange (1) having a Clamping means interface (4) for clamping the workpiece and the lower flange (2) comprises an interface (5) for fastening means for fixing the device to the balancing spindle, at least two spring elements (22, 23) between the upper and the lower flange (1,2) are arranged so that the upper flange (1) in the basic position axially and radially exclusively on the two spring elements (22, 23) is supported and that the upper flange (1) in the basic position with a spring elements (22 , 23) is movable relative to the lower flange (2) in an eccentric position, comprising a compression spring (9) and a piston (13) Displacement device between the upper and the lower flange (1,2) is arranged arranged, by means of which the upper flange (1) by the piston (13) controlled axially into a clamping position is movable, in which it clamped to the lower flange (2) fitting is.
    [2]
    2. Apparatus according to claim 1, characterized in that in the clamping position of the piston (13) by spring force of the compression spring (9) for engagement with a support element (20) of a fastening element (21) of the upper flange (1) can be brought, so that the upper flange (1) can be tensioned by the piston (13) against the lower flange (2) and locked in the eccentric position.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the spring elements (22, 23) comprise an upper spring element (22) and a lower spring element (23) and the upper spring element (22) between the fastening element (21) of the upper flange (1) and a holding element (10) of the lower flange (2) and the lower spring element (23) between a free end of the fastening element (21) and the lower flange (2) is braced.
    [4]
    4. Device according to one or more of the preceding claims, characterized in that the distance of the upper flange (1) to the lower flange (2) with the displacement device is variable and the upper flange (1) with a contact surface (29) for frictional Attachment to a bearing surface (30) of the lower flange (2) can be brought.
    [5]
    5. Device according to one or more of the preceding claims, characterized in that the lower flange (2) has at least one air duct (17) and an air inlet valve connected thereto, wherein the air duct (17) is arranged such that by blowing Compressed air in the air inlet valve, an effective surface (14) of the piston (13) can be pressurized and the piston (13) against the spring force of the compression spring (9) from the system on the support element (20) of the fastening element (21) is movable so that the device from the clamping position can be brought into the basic position.
    [6]
    6. Apparatus according to claim 5, characterized in that the air channel (17) has at least one air outlet opening (18) which is closed by a closure means.
    [7]
    7. Device according to one or more of the preceding claims, characterized in that the upper flange (1) in the basic position by means of a positioning device which acts radially to the axis (3) centrally on the upper flange (1), against the spring force of the spring elements (22, 23) is movable in a plane perpendicular to the axis (3) extending.
    [8]
    8. Device according to one or more of the preceding claims, characterized in that the upper flange (1) is designed cup-shaped.
    [9]
    9. Device according to one or more of the preceding claims, characterized in that the spring force of the compression spring (9) is greater than the spring force of the spring elements (22, 23).
    [10]
    10. Device according to one or more of the preceding claims, characterized in that the spring elements (22, 23) are configured meandering.
    [11]
    11. The device according to one or more of the preceding claims, characterized in that the spring elements (22, 23) are designed such that under maximum load of the upper flange (1) has a minimum gap (31) between the abutment surface (29) of the upper flange (1) and the bearing surface (30) of the lower flange (2).
    [12]
    12. Device according to one or more of the preceding claims, characterized in that the displacement device is arranged by means of fastening means on the lower flange (2).
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    同族专利:
    公开号 | 公开日
    GB201612595D0|2016-08-31|
    CN106441704A|2017-02-22|
    GB2542250B|2020-12-02|
    US20170023432A1|2017-01-26|
    DE102015111789B3|2016-12-22|
    CN106441704B|2019-12-24|
    GB2542250A|2017-03-15|
    US10024748B2|2018-07-17|
    引用文献:
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    法律状态:
    2018-05-15| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: HOLEESTRASSE 87, 4054 BASEL (CH) |
    2019-10-31| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015111789.4A|DE102015111789B3|2015-07-21|2015-07-21|Device for aligning a workpiece in a balancing centering device|
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