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    Central axis adjustment structure of tailstock of woodworking lathe
    1.
    发明授权
    Central axis adjustment structure of tailstock of woodworking lathe 有权

    公开(公告)号：US11020873B2

    公开(公告)日：2021-06-01

    申请号：US16572605

    申请日：2019-09-17

    申请人： KINGSAND MACHINERY LTD.

    发明人： Chin-Feng Chang

    IPC分类号： B27C7/04 ,  B23B23/00

    摘要： A central axis adjustment structure of a tailstock of a woodworking lathe is disclosed. The tailstock has a circular hole therein, a front opening and a rear opening at front and rear ends of the tailstock. An end surface of the front opening has at least one screw hole. A guide rod is disposed in the circular hole, and has a rear end extending out of the rear opening. A collar is fitted onto an axial connecting shaft that is inserted in the circular hole. The guide rod is insertedly connected to a rear end of the axial connecting shaft. The collar has at least one perforation corresponding to the screw hole. At least one bolt is inserted through the perforation and screwed to the screw hole so that the collar is locked to the front end of the tailstock. A first annular gap is defined between the guide rod and the rear opening of the tailstock. A second annular gap is defined between the axial connecting shaft and the front opening of the tailstock. A third annular gap is defined between the bolt and the perforation of the collar.

    Convertible center drill
    2.
    发明授权
    Convertible center drill 有权

    公开(公告)号：US10549354B1

    公开(公告)日：2020-02-04

    申请号：US16114307

    申请日：2018-08-28

    申请人： Andrew Lankin

    发明人： Andrew Lankin

    IPC分类号： B23B23/00 ,  B23B23/02 ,  B23B23/04 ,  B23B43/02

    摘要： A center for use on a tailstock of a lathe is disclosed. The center comprises an elongated shaft having a proximal end to be secured in a tailstock of a lathe, and a distal end that includes a conical tip for insertion into a center hole in a workpiece. The center also comprises a pivotable arm having a proximal arm end that is rotatably and slidingly secured to the elongated shaft. The pivotable arm has a distal arm end that is rotatable into a position atop the conical tip. The distal arm end has a distal side that includes a center drill, and a proximal side that includes a recess that is seatable onto the conical tip. The conical tip and the center drill have the same rotational centerpoint when the distal arm end is positioned over the conical tip and the conical tip is placed within the recess.

    HOLDER AND MACHINE TOOL
    4.
    发明申请
    HOLDER AND MACHINE TOOL 审中-公开

    公开(公告)号：US20190217396A1

    公开(公告)日：2019-07-18

    申请号：US16249201

    申请日：2019-01-16

    申请人： OKUMA Corporation

    发明人： Hiroyuki SUGIURA

    IPC分类号： B23B23/00 ,  B23Q1/28

    CPC分类号： B23B23/005 ,  B23B2260/07 ,  B23Q1/28

    摘要： A holder for clamping a tool includes a clamping mechanism for clamping the tool, and an exposed portion. The clamping mechanism is switchable between a clamping state and an unclamping state. The clamping state is a state in which removal of the tool from the holder is hindered. The unclamping state is a state in which removal of the tool from the holder is allowed. The exposed portion is exposed outside the holder and directly or indirectly and mechanically linked to the clamping mechanism. The exposed portion is pushed in one direction for movement to thereby switch the clamping mechanism to the unclamping state.

    CENTER-ROTATION TYPE TAILSTOCK
    5.
    发明申请
    CENTER-ROTATION TYPE TAILSTOCK 审中-公开

    公开(公告)号：US20180147633A1

    公开(公告)日：2018-05-31

    申请号：US15571961

    申请日：2017-04-20

    申请人： Futamura Kiki Kabushiki Kaisha

    发明人： Tadahiro FUTAMURA ,  Satoru YAMAMURA ,  Masaya SATOH

    IPC分类号： B23B23/00 ,  B23B23/04

    CPC分类号： B23B23/00 ,  B23B23/04 ,  B23B2233/12

    摘要： In a center-rotation type tailstock, unavailable time due to replacement of parts such as bearings is shortened. A built-in hole is formed in a tailstock spindle. A center rotating mechanism unit is attachable to and detachable from the built-in hole. In the unit, a rotary shaft is supported in a tubular body by bearings. The rotary shaft is made enable a center to be attached. When replacing the parts in the unit attached to the built-in hole, the unit is detached from the built-in hole, and another center rotating mechanism unit incorporating new parts is attached to the built-in hole.

    Tailstock control device
    8.
    发明授权
    Tailstock control device 有权

    公开(公告)号：US09610637B2

    公开(公告)日：2017-04-04

    申请号：US14694321

    申请日：2015-04-23

    申请人： OKUMA Corporation

    发明人： Yoshiichi Ichikawa

    IPC分类号： B23Q15/20 ,  B23B23/00 ,  G05B19/416 ,  B23Q15/12 ,  B23Q17/00

    CPC分类号： B23B23/00 ,  B23Q15/12 ,  B23Q15/20 ,  B23Q17/002 ,  B23Q17/005 ,  G05B19/4166 ,  G05B2219/37589 ,  G05B2219/42176 ,  Y10T82/2502

    摘要： A tailstock control device includes a tailstock parameter setting unit that receives, in advance, setting of tailstock acceleration time ta, tailstock movement velocity V, drive torque measuring period t, and number n of drive torque measurements; a calculating unit that calculates acceleration zone distance La from the acceleration time ta and the movement velocity V; a calculating unit that calculates constant velocity zone distance Lb from the movement velocity V, the measuring period t, and the number n of measurements; a drive torque detecting unit that detects servo motor drive torque; and a control unit that sets La+Lb as drive torque measuring distance Lt and calculates servo motor drive torque limit value τc from drive torque T detected by the drive torque detecting unit when the tailstock is moved over La+Lb and also from a servo motor torque command value τa required for supporting a workpiece.