公开(公告)号：US11287400B2

公开(公告)日：2022-03-29

申请号：US16767019

申请日：2019-09-29

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yongqing Wang ,  Haibo Liu ,  Te Li ,  Meng Lian ,  Kuo Liu ,  Zhenyuan Jia

IPC: G01N29/28 ,  G01N29/265

Abstract: A large-panel ultrasonic on-machine scanning thickness measurement equipment and method is disclosed. A GNCMT is adopted as the measuring machine main body on which a measured large panel is clamped and conducts scanning measurement motion; a non-contact ultrasonic measurement device is installed on the spindle of the machine tool for realizing transmission and acquisition of ultrasonic signals; a coupling liquid circulation system with the functions of multi-layer filtering, flow monitoring and regulation is set up; a jet flow immersion coupling mode is adopted on the surface of the measured large panel, and micro-emulsion cutting fluid is used as compatible coupling liquid of ultrasonic on-machine thickness measurement; and the coupling liquid is recycled, purified and stably supplied circularly. The thickness measurement equipment has high multi-function integration and reliable performance. It is easy to operate and highly automated, which effectively realizes nondestructive, accurate, efficient on-machine wall thickness measurement of the large panel.

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：US11009857B2

公开(公告)日：2021-05-18

申请号：US16471478

申请日：2018-08-30

Applicant: Dalian University of Technology

Inventor： Kuo Liu ,  Haibo Liu ,  Te Li ,  Haining Liu ,  Yongqing Wang ,  Zhenyuan Jia

IPC: G05B19/418

Abstract: An application method of the thermal error-temperature loop in the spindle of a CNC machine tool. This uses a bar and two displacement sensors to determine radial thermal errors of the spindle. Meanwhile two temperature sensors are used to determine the temperature of the upper and lower surfaces of the spindle box. Then, the thermal error-temperature loop is drawn with the temperature difference between two temperature sensors as the abscissa and the radial thermal error of the spindle as the ordinate. Finally, the loop is employed to analyze the mechanism of the radial thermal deformation of the spindle and the thermal error level is evaluated. Since the method is based on measured data, the results of the analysis are closer to the reality, compared to those from the numerical simulations.

公开(公告)号：US10814448B2

公开(公告)日：2020-10-27

申请号：US16483256

申请日：2018-08-28

Applicant: Dalian University of Technology

Inventor： Kuo Liu ,  Haibo Liu ,  Te Li ,  Heng Chu ,  Yongqing Wang ,  Zhenyuan Jia

IPC: G05B19/414 ,  B23Q17/09 ,  B23Q15/12

Abstract: A comprehensive performance evaluation method for the CNC machine tools based on an improved pull-off method belongs to the technical field of performance evaluation of CNC machine tools. A linear proportional method is used to standardize the performance index data of machine tool. The entropy weight method and mean variance method are used to determine the two objective weights of each level of indicator. Based on the principle of vector A comprehensive evaluation of three-level index is obtained from the linear weighted evaluation function. Finally, a similar method was used to calculate the comprehensive evaluation of a large system layer by layer. The present invention is used for the comprehensive performance evaluation of various CNC machine tools and also for a lateral comparison of specific performance of different machine tools, providing a scientific and possible evaluation method and process for the comprehensive performance evaluation of machine tools.

公开(公告)号：US11370041B2

公开(公告)日：2022-06-28

申请号：US17052668

申请日：2020-02-28

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yongqing Wang ,  Tianran Liu ,  Haibo Liu ,  Kuo Liu ,  Te Li ,  Dongming Guo

IPC: B23Q1/01 ,  B23C3/18 ,  B23Q5/40 ,  B23C1/14 ,  B23Q5/28 ,  B23Q5/10 ,  B23C1/00

Abstract: The present invention relates to a slanting-bed feed processing machine tool of a large propeller. The machine tool comprises a slanting column feed bed, a machine tool spindle, a workpiece rotary worktable, a large propeller and a bed feed mechanism. The present invention coordinates the geometrical relationship between the machine tool and the large propeller to ensure that the slanting column feed bed moves between two blades, thereby reducing the overhang length of the spindle. Different forms of workpiece rotary worktables and bed feed mechanisms are selected according to different slanting column feed beds. Four types of slanting column feed beds are designed, which can be selected, optimized and applied for different processing objects. The present invention enhances the processing stiffness of the spindle and solves the problem of poor processing quality of the large propeller caused by machine tool vibration.

公开(公告)号：US11345054B2

公开(公告)日：2022-05-31

申请号：US17280716

申请日：2020-06-01

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Te Li ,  Yongqing Wang ,  Haibo Liu ,  Qile Bo ,  Boyao Cui ,  Jianhui Deng ,  Kuo Liu

IPC: B25J9/10 ,  B25J19/06 ,  B25J9/14 ,  B25J15/02 ,  B25J19/00

Abstract: A magnetic-induced stiffness changed soft robot drive module includes magnetic-induced stiffness changed layer, two-degree-of-freedom pneumatic driver, magnetic core and sealing fixing device. The magnetic-induced stiffness changed layer and two-degree-of-freedom pneumatic driver are printed and formed. The magnetic core can be deformed together with the driver, and a magnetic field can be generated when it is energized. After the magnetic core is installed into the two-degree-of-freedom pneumatic driver, then assembled with the sealing fixing device, a soft robot drive module with one end fixed is finished. The magnetic-induced stiffness changed layer has the fast, reversible and controllable stiffness adjustment ability under the action of electromagnetic field. As its hardness is greater than that of the two-degree-of-freedom pneumatic driver and its position is outside the air cavity, the two-degree-of-freedom pneumatic driver can be restricted from over-expansion and over-extension in the axial direction, making its pneumatic bending deformation controllable.

公开(公告)号：US10946459B2

公开(公告)日：2021-03-16

申请号：US16766557

申请日：2019-09-29

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Haibo Liu ,  Qi Luo ,  Junpeng Wang ,  Te Li ,  Kuo Liu ,  Yongqing Wang

IPC: B23C3/18 ,  B23P15/02 ,  B23P15/06 ,  F01D5/14 ,  F04B45/08 ,  G05B19/402

Abstract: A magnetorheological support method for blisk processing is disclosed. In the method, a fork structure and a soft film are used to wrap magnetorheological fluid. The magnetorheological fluid is used for flow filling under certain pressure. The bulged soft film can conduct shape matching on the surface of a blisk blade. The magnetorheological fluid can be cured through magnetic field excitation, thereby ensuring the flexible support for a weak rigid component. Electric permanent magnets are symmetrically arranged at both ends of the fork structure to construct a uniform magnetic field that can realize a global excitation of magnetorheological fluid, so that the magnetorheological fluid works in a shear mode to achieve damping force controlling by magnetic field. The solid-liquid conversion of the magnetorheological fluid is controlled by an electric permanent magnet field.