• 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:
    The invention relates to an adjusting mechanism (14) for an adjustable tool holder adapter (10) comprising a differential screw (30) having two threaded portions (34, 38) of different pitch but identical gear direction and a thrust piece (32) having a pressure piece thread (42), wherein one of the threaded portions of the differential screw (30) is screwed into the thread of the pressure piece (32). The invention also relates to an adjustable tool holder adapter (10) having at least one adjustment bore in which such an adjustment mechanism (14) is arranged.
    公开号:AT511620A2
    申请号:T573/2012
    申请日:2012-05-14
    公开日:2013-01-15
    发明作者:
    申请人:Kennametal Inc；
    IPC主号:
    专利说明:

    P44021
    The invention relates to an adjustment mechanism for an adjustable Werkzeughai teradapter and a tool holder adapter with such
    One part mechanism.
    The adjustable tool holder adapter is in particular a tool for precision borehole machining, in particular by means of a reaming tool. For high accuracy machining, the tool holder adapter can be set very precisely so that its center axis coincides within very close tolerances with the central axis of a receptacle associated with the tool holder adapter. For this purpose, among other things, an adjustment mechanism is provided, with which the tool holder adapter can be tilted relative to a receptacle. In this way, the center axis of the tool holder adapter can be aligned parallel to the central axis of the recording. In addition, a not in the context of the present application, further relevant radial adjustment mechanism is provided, with which the position of the tool holder adapter can be adjusted relative to the recording in the radial direction. Roughly simplified, the adjustment mechanism and the adjustment mechanism can be considered together as a type of joint with which the toolholder adapter is coupled to the receptacle. The adjustment mechanism ensures that the hinge is in place, that is, with its central axis on the central axis of the receptacle, and the adjustment mechanism ensures that the central axis of the toolholder adapter extends in the extension of the central axis of the receptacle.
    In the prior art, the adjustment mechanism consists of a respective adjusting screw, four of which are provided on a collar of the tool holder adapter. In the collar, a thread is provided, into which the adjusting screws are screwed, so that their end remote from the screw head extends through the collar. There is each adjusting screw on a mating surface of the recording. By suitably adjusting the four adjusting screws, the angular position of the tool holder adapter can be adjusted relative to the receptacle. The adjusting screws act in the manner of adjustable Abstandhaltem.
    The object of the invention is to provide an adjustment mechanism for such a tool holder adapter, with a more precise adjustment is possible.
    To achieve this object, it is provided according to the invention that the adjustment mechanism be made possible. i «has a differential screw having two threaded portions with different pitch, but identical gear direction, and a pressure piece having a pressure piece thread, wherein one of the threaded portions of the differential screw is screwed into the thread of the pressure piece. The invention is based on the idea of using the differential screw to "reduce" the feed, which results in a predetermined rotation of the adjusting screw. Unlike in the prior art, in which a rotation of the adjusting screw leads to a feed rate which corresponds to the thread pitch of the adjusting screw, the differential screw only has a feed which is equal to the difference between the two thread pitches. This allows the toolholder adapter to be set much more precisely.
    According to one embodiment of the invention, the pressure piece is cylindrical and provided on its outside with an anti-rotation agent. The anti-rotation means prevents the pressure piece of the differential screw rotates, with no further action being required on the part of the tool holder adapter.
    The anti-rotation agent can be formed according to a technically simple embodiment by an O-ring or by two O-rings. In this way, a very cost-effective structure.
    In particular, it can be provided that the pressure piece has in its peripheral surface at least one groove for receiving an O-ring. This ensures that the O-rings do not slip in the axial direction when the pressure piece is displaced by the di fferentialschraube.
    According to one embodiment of the invention it is provided that the differential screw has a hexagon socket. This is particularly advantageous because then no external screw head must be provided, resulting in a very compact design of the tool holder adapter.
    According to a preferred embodiment of the invention it is provided that one of the threaded portions is a thread Ml0x1 and the other of the threaded portions is a thread M8x0.75. Due to the resulting difference of the two gradients, a complete rotation of the adjusting screw leads to an axial feed of the pressure piece of only 0.25 mm, so that the tool holder adapter can be set particularly sensitive.
    To achieve the above object, an adjustable tool holder adapter is provided with at least one Einstellbohrung in which an adjustment mechanism is arranged, as described above,
    Preferably, it is provided that the Einstellbohrung is a stepped bore, wherein in a portion of a Einstellgewinde is provided, in which one of the threaded portions of the differential bolt engages, and the other portion receives the pressure piece. In this way, a very compact construction of the toolholder adapter s, especially in the axial direction, results.
    It is preferably provided that the pressure piece section of the stepped bore has a cylindrical, smooth wall. At this, the O-ring of the pressure piece attack, so that the pressure piece is secured against unintentional co-rotation without much mechanical effort. Furthermore, the adjustment mechanism can be mounted with little effort on the tool holder adapter.
    A particularly advantageous aspect of the adjustment mechanism according to the invention is that tool holder already in use can be retrofitted with little effort, since the threaded portion of the differential screw, which is associated with the adjusting thread, is the same as in the prior art. Therefore, no new thread must be cut here.
    The invention will be described below with reference to an embodiment which is illustrated in the accompanying drawings. In these show:
    Figure 1 shows schematically a tool holder adapter attached to a receptacle;
    FIG. 2 is a schematic longitudinal section through a tool holder adapter according to the invention; - Figure 3 shows the tool holder adapter of Figure 2 in a perspective view; FIG. 4 is an enlarged side view of the differential screw used in the tool holder adapter of FIGS. 2 and 3; and Figure 5 is a sectional view of the pressure piece used in the tool holder adapter of Figures 2 and 3.
    In Figure 1, a receptacle 5 is shown, which can be mounted for example in a machine tool. In the receptacle 5, a tool holder adapter 10 is arranged, which is to receive a reaming tool, with which a precision machining, for example, made of boreholes.
    The tool holder adapter 10 can be adjusted by means of an adjusting mechanism 12 in the radial direction and slightly pivoted by means of an adjusting mechanism 14 relative to the central axis M of the receptacle 5 (see the arrow P in Figure 1). The adjustment mechanism 12 serves to adjust the tool holder adapter 10 relative to the receptacle 5 so that the center axis M of the receptacle 5 and the center axis M of the tool holder adapter 10 coincide in the plane of the adjustment mechanism 12. The adjustment mechanism 14 serves to align the center axis M of the tool holder adapter 10 so that it extends exactly in the extension of the central axis M of the receptacle 5. For this purpose, the tool holder adapter 10 can of course be tilted not only in the direction of the arrow P, but also perpendicular to this arrow, ie in a direction perpendicular to the plane.
    The tool holder adapter 10 here has a connection 20 which is arranged in the receptacle 5 and on which the adjusting mechanism 12 engages, and a collar 22 which is located between the connection 20 and a tool side 24 of the tool holder adapter 10. The collar 22 has the basic shape of a cylindrical disc and is provided with four mounting holes 26, which are provided for receiving fastening screws (not shown), with which the tool holder adapter 10 can be attached to the receptacle 5. The mounting holes 26 are evenly distributed around the central axis M at an angular distance of 90 °. Uniformly between the mounting holes 26 and thus also at an angular distance of 90 ° to each other a total of four adjustment mechanisms 14 in the collar 22 of the tool holder adapter 10 are arranged.
    Each adjustment mechanism 14 consists of a differential screw 30 (see FIG. 4) and a pressure piece 32 (see FIG. 5). The differential screw 30 has a first threaded portion 34 which is provided with an external thread Ml0x1. The first threaded section 34 is adjoined by a waisted transition section 36, which in turn is followed by a second threaded section 38. This has an external thread M8x0.75. On the side of the first threaded portion 34, the differential screw 30 is provided with a hexagon socket 40 (5 mm). The threads on the two threaded sections have the same direction, preferably right-handed.
    The pressure piece 32 is disc or annular executed with an inner bore 42 into which an internal thread M8x0.75 is cut, so matching the threaded portion 38 of the differential screw. The peripheral surface 44 is made smooth and cylindrical, wherein two circumferential grooves 46 are formed in the peripheral surface 44. In each of the grooves 46, an O-ring 48 is arranged. These stand slightly above the peripheral surface 44.
    To accommodate the adjustment mechanism 14, a stepped bore 49 is provided in the collar 22, which has an adjusting screw section 50 and a pressure piece section 52. The adjusting screw portion 50 is provided with an internal thread Ml0x1, that is, corresponding to the threaded portion 34. The thrust piece portion 52, which is disposed on the side of the terminal 20 and thus on the side facing the receptacle 5, is shaped as a cylindrical one Bore executed with a smooth wall. The dimensions of the pressure piece section 52 are such that the two O-rings 48 abut with prestress against the cylindrical wall of the pressure piece section 52.
    When the differential screw 30 (to the right in a right hand thread) is rotated, it screws deeper into the thread in the collar 22 of the tool holder adapter 10. Since the two threaded portions 34, 38 have a thread with the same direction of movement, the differential screw screws simultaneously deeper into the pressure piece 32 into it. Due to the difference in the slopes of the two threads of the differential screw this screwed in, for example, a complete revolution by 1 mm deeper into the collar 22 into it, while she hineinschraubt only 0.75 mm in the pressure piece 32. This results in an axial forward movement of the pressure piece 32 by 0.25 mm, so a feed of the pressure piece from the pressure piece recording 52 out. The O-rings 48 prevent that the pressure piece 32 rotates in the circumferential direction.
    In the initial state, the four pressure pieces 32 are within the pressure piece section 52 of the stepped bore. Subsequently, the tool holder adapter 10 is attached to the receptacle 5 so that the plungers lie directly opposite the end face of the receptacle 5. If it is determined that the center axis M of the tool holder adapter 10 deviates to one side from the desired position, the differential screw (or possibly the two differential screws) is actuated, to which the central axis is inclined. As a result, the corresponding pressure piece 32 relative to FIG. 2 is moved to the right, that is, pushed out of the collar 22, so that the
    Tool holder adapter 10 is pushed away on this side of the receptacle 5 and the center axis M comes closer to the desired position. In this way, the desired alignment of the center axis M can be obtained (possibly iteratively).
    权利要求:
    Claims (9)
    [1]
    1. An adjustment mechanism (14) for an adjustable tool holder adapter (10), comprising a differential screw (30) having two threaded portions (34, 38) of different pitch but more identical Has gear direction, and a pressure piece (32) having a pressure piece thread (42), wherein one of the threaded portions of the differential screw (30) is screwed into the thread of the pressure piece (32).
    [2]
    2. adjusting mechanism according to claim 1, characterized in that the pressure piece (32) is cylindrical and is provided on its outer side with an anti-rotation means (48).
    [3]
    3. adjusting mechanism according to claim 2, characterized in that the anti-rotation means comprises at least one O-ring (48), preferably two O-rings (48).
    [4]
    4. Adjustment mechanism according to claim 3, characterized in that the pressure piece (32) has in its peripheral surface at least one groove (46) for receiving an O-ring (48).
    [5]
    5. Adjusting mechanism according to one of the preceding claims, characterized in that the differential screw (30) has a hexagon socket (40).
    [6]
    6. Adjusting mechanism according to one of the preceding claims, characterized in that one of the threaded portions (34, 38) has a thread Ml0x1 and the other of the threaded sections from (34, 38) is a thread M8x0.75.
    [7]
    An adjustable tool holder adapter (10) having at least one adjustment bore in which an adjustment mechanism (14) according to any one of the preceding claims is arranged. 3. Tool holder adapter according to claim 7, characterized in that the Einsteilbohrung is a stepped bore (49), wherein in a section (50) is provided a Einstellgewinde in which one of the threaded portions (34) of the differential screw (30) engages, and the other Section (52) the pressure piece (32) aufhimmt. ♦ · • φ ψ 9 99 9 · · · · «« 9 9 9 Φ 9


    [8]
    9. Tool holder adapter according to claim 8, characterized in that the pressure piece section (52) of the stepped bore (49) has a cylindrical, smooth wall.
    [9]
    10. Tool holder adapter according to claim 9, characterized in that the pressure piece (32) is provided with at least one O-ring (48) which frictionally rests against the wall of the pressure piece portion (52) of the stepped bore (49).
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3635572A|1970-05-18|1972-01-18|Valeron Corp|Boring bar adjustment|
    US4218068A|1978-12-26|1980-08-19|Caterpillar Tractor Co.|Deflectable holding assembly|
    US4428704A|1980-07-28|1984-01-31|Ex-Cell-O Corporation|Micro-adjusting cartridge for cutting tool|
    US5208570A|1992-04-06|1993-05-04|Caterpillar Inc.|Solenoid construction and method for making same|
    US5286042A|1993-03-24|1994-02-15|Hydra-Lock Corporation|Tool holder with centering adjustment|
    DE4404725A1|1994-02-16|1995-08-17|Beck August Gmbh Co|Alignment adapter|
    US5997012A|1996-06-27|1999-12-07|Brian; Frank J.|Differential thread control of chuck gripping of work|
    JP2000052176A|1998-06-04|2000-02-22|Manyoo Tool Kk|Tool holder|
    US5915896A|1998-09-14|1999-06-29|Sikorsky Aircraft Corp.|Adjustable machine tool assembly|
    KR100610548B1|1999-08-30|2006-08-09|에누티쯔루 가부시키가이샤|Tool holder and vibration complementing apparatus of the tool holder|DE102013203297B3|2013-02-27|2014-05-28|Kennametal Inc.|Tool holder i.e. pendulum holder, for passive compensating radial offset between borehole axis and tool axis, has holder parts moved with each other in radial direction and connected in radial direction through connector|
    JP6242153B2|2013-10-28|2017-12-06|三菱重工工作機械株式会社|Spindle mechanism|
    US20160067788A1|2014-09-06|2016-03-10|James C. Brown|Adjustable Tool Holder|
    DE102014225914B3|2014-12-15|2016-03-17|NUBIUS GROUP Präzisionswerkzeuge GmbH|Coupling arrangement with adjustment surface|
    DE102014225913B3|2014-12-15|2016-03-17|NUBIUS GROUP Präzisionswerkzeuge GmbH|Tool holder with adjusting body|
    DE102014226654B4|2014-12-19|2016-12-08|MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG|chuck|
    DE102018222549A1|2018-12-20|2020-06-25|Kennametal Inc.|Adjusting device and method for operating an adjusting device|
    法律状态:
    2019-07-15| AZ| Withdrawn|Effective date: 20190715 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011104982A|DE102011104982B4|2011-06-20|2011-06-20|Adjustment mechanism for adjustable tool holder adapter and tool holder adapter|
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