公开(公告)号：US20160144474A1

公开(公告)日：2016-05-26

申请号：US14582640

申请日：2014-12-24

Applicant: Industrial Technology Research Institute

Inventor： Tsung-Ling Hwang ,  Tzuo-Liang Luo ,  Chin-Te Lin ,  Shuo-Peng Liang ,  Ta-Jen Peng

IPC: B23Q15/12 ,  G05B19/404

CPC classification number: B23Q15/12 ,  G05B19/404 ,  G05B2219/37337 ,  G05B2219/41256 ,  G05B2219/49105

Abstract: A feedback control numerical machine tool and a method thereof are provided. The machine tool includes at least two spindles, an acoustic frequency detecting module, at least two spindle position detecting modules, and a control module. The spindles machine a workpiece. The acoustic frequency detecting module detects an acoustic frequency of the spindles when machining the workpiece. The spindle position detecting modules detects position information of the spindles when machining the workpiece. The control module acquires the acoustic frequency and the position information of the spindles, monitors whether any of the spindles chatters according to the acoustic frequency of the spindles, and performs chattering avoidance to the spindle that chatters according to the position information of the spindles. As such, the present disclosure performs chattering monitoring to a plurality of spindles and avoids the chattering immediately.

Abstract translation: 提供了一种反馈控制数字机床及其方法。 机床包括至少两个主轴，声频检测模块，至少两个主轴位置检测模块和控制模块。 主轴加工一个工件。 在加工工件时，声频检测模块检测心轴的声频。 主轴位置检测模块在加工工件时检测主轴的位置信息。 控制模块获取主轴的声频和位置信息，监视根据心轴的声频是否有任何心轴颤动，并根据心轴的位置信息对主轴进行抖动回避。 因此，本公开对多个锭子进行抖动监视，并且避免立即颤动。

公开(公告)号：US20150294034A1

公开(公告)日：2015-10-15

申请号：US14528175

申请日：2014-10-30

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chien-Chih Liao ,  Chin-Te Lin ,  Pei-Yin Chen ,  Tzuo-Liang Luo

IPC: G06F17/50

CPC classification number: G06F17/5018 ,  G06F17/5086

Abstract: A machine tool design method includes: receiving a finite element model of tool-spindle system including a cutting tool, a working spindle speed range, and a target cutting depth; providing a simplified finite element model of main frames of machine tool and initializing its configuration parameters including an equivalent stiffness and an equivalent mass; combining the simplified finite element model of main frames of machine tool with the finite element model of tool-spindle system to construct an equivalent machine tool model; according to a response of the configuration parameters, proceeding a cutting stability prediction of the equivalent machine tool model, and computing an objective function value based on a predicted result; and determining whether the objective function value meets a preset design requirement, if yes, employing the configuration parameters to be references to design a machine tool, if not, updating the configuration parameters and proceeding the cutting stability prediction again.

Abstract translation: 一种机床设计方法，包括：接收刀具主轴系统的有限元模型，包括切削刀具，工作主轴转速范围和目标切削深度; 提供机床主框架的简化有限元模型，初始化其配置参数，包括等效刚度和等效质量; 结合机床主机简化有限元模型与刀具主轴系统有限元模型，构建等效机床模型; 根据配置参数的响应，对等效机床模型进行切割稳定性预测，并根据预测结果计算目标函数值; 并且确定目标函数值是否满足预设设计要求，如果是，则使用配置参数作为设计机床的参考，否则，更新配置参数并再次进行切割稳定性预测。

公开(公告)号：US09956661B2

公开(公告)日：2018-05-01

申请号：US14582640

申请日：2014-12-24

Applicant: Industrial Technology Research Institute

Inventor： Tsung-Ling Hwang ,  Tzuo-Liang Luo ,  Chin-Te Lin ,  Shuo-Peng Liang ,  Ta-Jen Peng

IPC: G06F19/00 ,  B23Q15/12 ,  G05B19/404

CPC classification number: B23Q15/12 ,  G05B19/404 ,  G05B2219/37337 ,  G05B2219/41256 ,  G05B2219/49105

Abstract: A feedback control numerical machine tool and a method thereof are provided. The machine tool includes at least two spindles, an acoustic frequency detecting module, at least two spindle position detecting modules, and a control module. The spindles machine a workpiece. The acoustic frequency detecting module detects an acoustic frequency of the spindles when machining the workpiece. The spindle position detecting modules detects position information of the spindles when machining the workpiece. The control module acquires the acoustic frequency and the position information of the spindles, monitors whether any of the spindles chatters according to the acoustic frequency of the spindles, and performs chattering avoidance to the spindle that chatters according to the position information of the spindles. As such, the present disclosure performs chattering monitoring to a plurality of spindles and avoids the chattering immediately.

公开(公告)号：US09833868B2

公开(公告)日：2017-12-05

申请号：US14971438

申请日：2015-12-16

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Tsung-Ling Hwang ,  Chin-Te Lin ,  Shuo-Peng Liang ,  Ta-Jen Peng ,  Jen-Ji Wang ,  Tzuo-Liang Luo

IPC: B23Q17/09 ,  G05B19/404

CPC classification number: B23Q17/0976 ,  G05B19/404 ,  G05B2219/31407 ,  G05B2219/41115 ,  G05B2219/41256 ,  G05B2219/49075

Abstract: A chatter avoidance method and device is provided, including steps of: providing a stable operating condition plot; partially removing a first layer of a workpiece with a predetermined first removal depth according to a safe removal depth of the stable operating condition plot and sensing a chatter caused by the removal operation; if no chatter is sensed, completing the removal operation, otherwise, continuing to partially remove the first layer with a second removal depth less than the predetermined first removal depth; and determining a minimum removal depth according to the removal operation, and removing a last layer of the workpiece with a last removal depth less than or equal to the minimum removal depth, allowing the workpiece to have a target thickness. The disclosure prevents a chatter from continuously occurring without requiring a shut-down and thereby maintains a desired production rate.