公开(公告)号：US11484982B2

公开(公告)日：2022-11-01

申请号：US16636268

申请日：2019-02-21

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Kuo Liu ,  Te Li ,  Yongquan Gan ,  Wei Han ,  Dawei Li ,  Zhisong Liu ,  Yongqing Wang

IPC: G01K15/00 ,  B23Q11/00 ,  G05B19/404

Abstract: An online geometric/thermal error measurement and compensation system for computer numerically controlled (CNC) machine tools belonging to the technical field of error testing and compensation of CNC machine tools. The online CNC machine tool geometric/thermal error measurement and compensation system includes two parts: the hardware platform and the measurement and compensation software. The hardware platform includes a unidirectional acceleration sensor, a precision integrated circuit (IC) temperature sensor, a multi-channel temperature data collector, and a geometric/thermal error measurement and compensation host. The error measurement and compensation software runs in the geometric/thermal error measurement and compensation host and realizes testing and compensation of geometric and thermal errors in machine tools, which are communicated to the FANUC CNC system.

公开(公告)号：US11125552B2

公开(公告)日：2021-09-21

申请号：US16462234

申请日：2018-01-23

Applicant: Dalian University of Technology

Inventor： Yongqing Wang ,  Haibo Liu ,  Jiakun Wu ,  Kuo Liu ,  Kang Kuang ,  Dawei Li

IPC: G01B11/27

Abstract: A rapid detection method for the geometric accuracy of the linear motion axis of an NC machine tool, uses accelerometers to measure the acceleration perpendicular to the direction of motion when the linear motion axis moves at a uniform speed. Firstly, the measuring device is mounted on the linear motion axis, and the upper measurement system automatically performs multi-channel acquisition and storage of the motion point acceleration data. Then, filter the acceleration data at the different speeds. Finally, the displacement data is obtained by quadratic integration of the filtered acceleration data in the time domain. Then calculate the straightness of the linear motion axis using the End Point Fit method, and complete the rapid measurement of the straightness of the linear motion axis of the machine tool. This can realize the rapid measurement of the geometric accuracy of the linear motion axis of the machine tool.