Clamp-type measuring device and measuring method

    公开(公告)号:US10393496B2

    公开(公告)日:2019-08-27

    申请号:US15851457

    申请日:2017-12-21

    IPC分类号: G01B7/02 B23Q17/00 B25B5/16

    摘要: The disclosure is related to a clamp-type measuring device includes a clamp and an interval measuring module. The clamp includes a guiding rail and two holding arm. Each of holding arms includes a guide part, a connecting part, and a clamping part. The guide part is movably furnished on the guiding rail. Both ends of the connecting part are respectively connected to the guide part and the clamping part. The interval measuring module includes a first measuring element and a second measuring element. The first measuring element and the second measuring element are furnished on the two connecting parts respectively. The first measuring element and the second measuring element are slidable through the two guide parts respectively in order to measure an interval between the two clamping parts. In addition, the disclosure is also related to a measuring method of the clamp-type measuring device.

    Measuring method and device of machine accuracy in machine tool

    公开(公告)号:US10378872B2

    公开(公告)日:2019-08-13

    申请号:US15451439

    申请日:2017-03-07

    发明人: Tomoki Sakai

    IPC分类号: B23Q17/00 G01B21/04 G01B5/012

    摘要: A method and a device can measure machine error of an axis of rotation in a tool post having a touch probe without restriction of an angular range of an angle of rotation. Directions of a measurement plane and a measurement axis in a five-axis measurement are switched in correspondence to a range of the angle of rotation in a touch probe. The five-axis measurement is carried out by setting a position in a direction of a measurement axis in a measurement plane to a position where a reference sphere does not interfere with a lever rod of the touch probe as occasion demands. The five-axis measurement is carried out, for example, by setting the measurement plane to a position which is perpendicular to a line connecting an estimated center of the reference sphere and a center of a tip sphere or the lever rod of the touch probe.

    Machine tool
    35.
    发明授权

    公开(公告)号:US10335863B2

    公开(公告)日:2019-07-02

    申请号:US15924667

    申请日:2018-03-19

    申请人: FANUC CORPORATION

    发明人: Naoya Ishiyama

    摘要: A machine tool includes: a column; a spindle head supported by the column; a spindle in the spindle head; a draw bar moved upward to clamp a tool to the lower end portion of the spindle and moved downward to release the tool therefrom; a biasing portion biasing the draw bar upward; a cam mechanism including a cam in the column and an arm whose one end slides on a cam surface such that the other end pushes down the draw bar; a measurement portion measuring the position of the draw bar; a storage portion storing a position relationship between the spindle head and the draw bar when the cam mechanism is normal; and an abnormality determination portion determining an abnormality in the cam mechanism based on the position of the draw bar measured with the measurement portion and the relationship stored in the storage portion.

    Machine tool
    36.
    发明授权

    公开(公告)号:US10328543B2

    公开(公告)日:2019-06-25

    申请号:US15678677

    申请日:2017-08-16

    申请人: OKUMA Corporation

    发明人: Shoichi Morimura

    摘要: A machine tool which removal-machines a workpiece by means of a tool includes a retaining device (a workpiece spindle and a tailstock) that retains the workpiece, a support device (an in-machine robot) that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device, and a control device that controls driving of the support device by force control having a force as a control target. Specifically, a supporting force by the support device and a machining force by a tool are measured, and the driving of the support device is controlled so that the supporting force is equal to the machining force.

    Machine tool
    39.
    发明授权

    公开(公告)号:US10265818B2

    公开(公告)日:2019-04-23

    申请号:US15672350

    申请日:2017-08-09

    申请人: Okuma Corporation

    发明人: Takaaki Tanaka

    摘要: In a machine tool, when machining is in a steady zone, a rotation phase of a main spindle at the time of measurement in the N-th sampling is calculated, and the calculated rotation phase and the measurement value are recorded in a recording section so as to be associated with each other. The measurement and calculation of the rotation phase of the main spindle at the time of each measurement are continued for plural times of rotations of the main spindle, and thus the measurement values are obtained at various rotation phases, whereby change in drive force during one rotation of the main spindle is finally calculated.

    Method for evaluating tool installation, and machine tool

    公开(公告)号:US10239176B2

    公开(公告)日:2019-03-26

    申请号:US15551647

    申请日:2015-03-02

    发明人: Yuji Takano

    摘要: Provided is a method for evaluating tool installation when fastening a tool to a main shaft of a machine tool, wherein the method includes a storage step for storing a reference location of a draw bar at the time when the tool is contacting a mounting seat of the main shaft, in a state in which foreign matter has been removed from the surface of the mounting seat and from the contacting surface of the tool. The method for evaluating tool installation includes a measuring step for measuring a measurement location of the draw bar when the tool is installed on the main shaft, and a determination step for determining the installation state of the tool to be abnormal if a measurement-location error with respect to the reference location exceeds a predetermined determination range.