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1. 发明申请

US20150168938A1 Controller for Spindle Motor 有权
标题翻译：主轴电机控制器
公开(公告)号：US20150168938A1
公开(公告)日：2015-06-18
申请号：US14475242
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Teruaki Ishibashi , Shinji Ishii , Koji Yamamoto , Yuki Terada
IPC分类号： G05B19/18 , G06N99/00
CPC分类号： G05B19/4163 , G05B2219/49077
摘要： A controller has a varying speed signal generation unit generating a varying speed command signal varying at predetermined amplitude and period, a current control unit generating a current command signal based on the varying speed command signal, a feedback control unit generating a correction signal based on a deviation between the varying speed command signal and a present rotational speed of the spindle motor and adding the correction signal to the current command signal, and a learning control unit calculating a disturbance component caused by cutting resistance based on the deviation every predetermined rotation angle of the spindle motor and, in synchronism with a rotation angle of the spindle motor corresponding to the varying speed command signal input into the current control unit, generating a compensation signal based on the disturbance component corresponding to the rotation angle and adding the compensation signal to the varying speed command signal.
摘要翻译：控制器具有变化速度信号生成单元，其生成以规定的振幅和周期变化的变速指令信号，基于变速指令信号生成电流指令信号的电流控制单元，基于变换速度指令信号生成校正信号的反馈控制单元变化速度指令信号与主轴电动机的当前旋转速度之间的偏差，并将校正信号加到电流指令信号上，学习控制单元根据每个预定旋转角度的偏差计算由切割阻力引起的干扰分量主轴电动机，并且与主轴电动机的旋转角度同步，该旋转角度与输入到电流控制单元的变速指令信号相对应，基于与旋转角度相对应的干扰分量产生补偿信号，并将补偿信号与变化速度指令信号。

2. 发明申请

US20150160643A1 Machining Method 有权
标题翻译：加工方法
公开(公告)号：US20150160643A1
公开(公告)日：2015-06-11
申请号：US14475166
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Teruaki Ishibashi , Shinji Ishii , Koji Yamamoto , Yuki Terada
IPC分类号： G05B19/18
CPC分类号： G05B19/404 , G05B2219/41115 , G05B2219/41256
摘要： Using a machine tool, a workpiece is machined while periodically varying the rotational speed of a spindle thereof. Correlation data on correlation between a speed variation rate RVA of the spindle rotational speed, a speed variation period ratio RVF thereof, and vibration of a tool when machining the workpiece while periodically varying the spindle rotational speed is previously obtained. Based on the correlation data, the speed variation rate RVA and the speed variation period ratio RVF are set so that the vibration of the tool and machining accuracy are within their respective allowable ranges, and based on the set speed variation rate RVA and speed variation period ratio RVF, a variation amplitude and a variation period of the spindle rotational speed are determined. The spindle is rotated at the rotational speed varying at the determined amplitude and period with respect to a target rotational speed, thereby machining the workpiece.
摘要翻译：使用机床，在周期性地改变其主轴的转速的同时加工工件。预先获得主轴转速的速度变化率RVA，其速度变化周期比RVF与加工工件同时周期性地改变主轴转速时的工具的振动之间的相关性的相关数据。基于相关数据，设定速度变化率RVA和速度变化周期比RVF，使得刀具的振动和加工精度在其各自的允许范围内，并且基于设定速度变化率RVA和速度变化周期比率RVF，主轴转速的变化幅度和变化周期被确定。主轴以相对于目标转速确定的振幅和周期变化的转速旋转，从而加工工件。

3. 发明申请

US20150145464A1 Controller and Control Method 有权
标题翻译：控制器和控制方法
公开(公告)号：US20150145464A1
公开(公告)日：2015-05-28
申请号：US14474823
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Hongzhong Zhu , Koji Yamamoto , Shinji Ishii
IPC分类号： G05B6/02 , G05B11/01 , G05B13/02
CPC分类号： G05B19/404 , G05B2219/41154 , G05B2219/41155
摘要： A controller has a control unit generating a control signal to control a drive motor and a friction compensation unit adding a friction compensation signal to the control signal for compensating for a positioning error caused by friction in a guide unit. When reversing the direction of movement of the movable body, the friction compensation unit generates a friction compensation signal in accordance with a function f(α) representing a friction compensation value uf by a relationship with a variable α and asymptotically approaching the maximum value and the minimum value of the friction compensation value uf and having an inflection point therebetween, and adds the generated friction compensation signal to the control signal generated by the control unit during movement of the movable body a predetermined movement distance from before to after the reversing.
摘要翻译：控制器具有产生控制信号以控制驱动电机的控制单元和摩擦补偿单元，该摩擦补偿单元向控制信号添加摩擦补偿信号，以补偿由引导单元中的摩擦引起的定位误差。当反转移动体的移动方向时，摩擦补偿单元根据表示摩擦补偿值uf的函数f（α）产生摩擦补偿信号，该函数f（α）与变量α的关系渐近地接近最大值，并且摩擦补偿值uf的最小值，并且在其之间具有拐点，并且将所产生的摩擦补偿信号相加于由可移动体在从反转之前到之后的预定移动距离期间由控制单元产生的控制信号。

4. 发明授权

US09846428B2 Controller for spindle motor 有权
公开(公告)号：US09846428B2
公开(公告)日：2017-12-19
申请号：US14475242
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Teruaki Ishibashi , Shinji Ishii , Koji Yamamoto , Yuki Terada
IPC分类号： G06F19/00 , G05B19/416
CPC分类号： G05B19/4163 , G05B2219/49077
摘要： A controller has a varying speed signal generation unit generating a varying speed command signal varying at predetermined amplitude and period, a current control unit generating a current command signal based on the varying speed command signal, a feedback control unit generating a correction signal based on a deviation between the varying speed command signal and a present rotational speed of the spindle motor and adding the correction signal to the current command signal, and a learning control unit calculating a disturbance component caused by cutting resistance based on the deviation every predetermined rotation angle of the spindle motor and, in synchronism with a rotation angle of the spindle motor corresponding to the varying speed command signal input into the current control unit, generating a compensation signal based on the disturbance component corresponding to the rotation angle and adding the compensation signal to the varying speed command signal.

5. 发明授权

US09651936B2 Machining method 有权
公开(公告)号：US09651936B2
公开(公告)日：2017-05-16
申请号：US14475166
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Teruaki Ishibashi , Shinji Ishii , Koji Yamamoto , Yuki Terada
IPC分类号： G05B19/404
CPC分类号： G05B19/404 , G05B2219/41115 , G05B2219/41256
摘要： Using a machine tool, a workpiece is machined while periodically varying the rotational speed of a spindle thereof. Correlation data on correlation between a speed variation rate RVA of the spindle rotational speed, a speed variation period ratio RVF thereof, and vibration of a tool when machining the workpiece while periodically varying the spindle rotational speed is previously obtained. Based on the correlation data, the speed variation rate RVA and the speed variation period ratio RVF are set so that the vibration of the tool and machining accuracy are within their respective allowable ranges, and based on the set speed variation rate RVA and speed variation period ratio RVF, a variation amplitude and a variation period of the spindle rotational speed are determined. The spindle is rotated at the rotational speed varying at the determined amplitude and period with respect to a target rotational speed, thereby machining the workpiece.

6. 发明授权

US09417622B2 Controller and control method 有权
标题翻译：控制器和控制方法
公开(公告)号：US09417622B2
公开(公告)日：2016-08-16
申请号：US14474823
申请日：2014-09-02
申请人： The University of Tokyo , DMG MORI SEIKI CO., LTD.
发明人： Hiroshi Fujimoto , Hongzhong Zhu , Koji Yamamoto , Shinji Ishii
IPC分类号： G05B19/18 , G05B19/404
CPC分类号： G05B19/404 , G05B2219/41154 , G05B2219/41155
摘要： A controller has a control unit generating a control signal to control a drive motor and a friction compensation unit adding a friction compensation signal to the control signal for compensating for a positioning error caused by friction in a guide unit. When reversing the direction of movement of the movable body, the friction compensation unit generates a friction compensation signal in accordance with a function f(α) representing a friction compensation value uf by a relationship with a variable α and asymptotically approaching the maximum value and the minimum value of the friction compensation value uf and having an inflection point therebetween, and adds the generated friction compensation signal to the control signal generated by the control unit during movement of the movable body a predetermined movement distance from before to after the reversing.
摘要翻译：控制器具有产生控制信号以控制驱动电机的控制单元和摩擦补偿单元，该摩擦补偿单元向控制信号添加摩擦补偿信号，以补偿由引导单元中的摩擦引起的定位误差。当反转移动体的移动方向时，摩擦补偿单元根据表示摩擦补偿值uf的函数f（α）产生摩擦补偿信号，该函数f（α）与变量α的关系渐近地接近最大值，并且摩擦补偿值uf的最小值，并且在其之间具有拐点，并且将所产生的摩擦补偿信号相加于由可移动体在从反转之前到之后的预定移动距离期间由控制单元产生的控制信号。

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