公开(公告)号：US20190317468A1

公开(公告)日：2019-10-17

申请号：US16311922

申请日：2018-01-07

Applicant: Dalian University of Technology

Inventor： Jianwei MA ,  Zhenyuan JIA ,  Dening SONG ,  Fuji WANG ,  Wei LIU ,  Ning ZHANG ,  Siyu CHEN ,  Guangzhi HE

IPC: G05B19/19 ,  G05B11/42

Abstract: The invented equivalent-plane cross-coupling control method belongs to high-precision and high-efficiency intelligent multi-axis CNC (Computer Numerical Control) machining filed, featured a three-axis cross-coupling controller based on the equivalent plane which can be used for improvement of the three-dimensional contour-following accuracy. This method first find the foot point from the actual motion position to the desired contour using a tangential back stepping based Newton method. Then, establish an equivalent plane which containing the spatial contouring-error vector by passing through the actual motion position and the tangential line at the foot point. After that, estimate the three-dimensional contouring error in a scalar form, thus controlling the signed error using a PID based two-axis cross-coupling controller. Finally, calculate the three-axis control signals according to the geometry of the equivalent plane, thus realizing the three-axis contouring-error control by using the well-studied two-axis contour controllers.

公开(公告)号：US20240264002A1

公开(公告)日：2024-08-08

申请号：US18021904

申请日：2022-09-26

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xiaohong LU ,  Chong MA ,  Zhenyuan JIA ,  Shixuan SUN ,  Yihan LUAN ,  Le TENG

IPC: G01J5/00 ,  B23K20/12

CPC classification number: G01J5/0018 ,  B23K20/1235 ,  G01J2005/0077

Abstract: The invention belongs to the field of friction stir welding (FSW) quality prediction and relates to an intelligent prediction method for the tensile strength of FSW joints considering welding temperature and axial force. The invention uses a combination of experiment and theory. FSW experiment is carried out, the infrared thermal imager and force sensor are used to obtain the temperature of the feature points on the advancing side and retreating side of the outside of the shoulder of the weldment surface and the axial force during FSW process. The obtained data is used to train and test the one-dimensional convolutional neural network. The tensile strength prediction of friction stir welding is realized, which provided a reference for welding process control.

公开(公告)号：US20240024993A1

公开(公告)日：2024-01-25

申请号：US18350921

申请日：2023-07-12

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fuji WANG ,  Hongwei ZHAO ,  Rao FU ,  Meng ZHAO ,  Dekun YIN ,  Zhenyuan JIA

IPC: B23P15/32 ,  B23P15/46

CPC classification number: B23P15/32 ,  B23P15/46

Abstract: The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

公开(公告)号：US20230384161A1

公开(公告)日：2023-11-30

申请号：US18108966

申请日：2023-02-13

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xiaohong LU ,  Guochuan SUI ,  Zhenyuan JIA ,  Shixuan SUN ,  Le TENG

IPC: G01J5/00 ,  G01J5/48 ,  G06F30/27

CPC classification number: G01J5/0003 ,  G01J5/485 ,  G06F30/27 ,  G01J2005/0077 ,  G06F2111/10

Abstract: The present invention belongs to the field of friction stir welding (FSW) temperature detection, and relates to a temperature characterization method of FSW weld zone based on infrared thermal imager. The invention combines theory with experiment. A temperature field simulation model of FSW is established based on DEFORM. The data sets of temperature of surface feature points, the maximum and minimum temperatures in weld zone are obtained according to the simulation model result. Then, Support Vector Regression (SVR) is used to establish a temperature characterization model, which represents the correlation between the temperature of surface feature points and the maximum and minimum temperatures in weld zone. In the actual welding process, an infrared camera is used to measure the temperature of the surface feature point in real-time. Combined with the built temperature characterization model, the characterization of the maximum and minimum temperatures in weld zone is achieved.

公开(公告)号：US20220164498A1

公开(公告)日：2022-05-26

申请号：US17429538

申请日：2021-04-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xiaohong LU ,  Yihan LUAN ,  Zhenyuan JIA ,  Feixiang RUAN ,  Han GU

IPC: G06F30/23

Abstract: The present invention belongs to the precise and efficient processing field of micro parts, in particular to a deformation prediction method of micro-milling thin-walled parts. Firstly, based on the finite element simulation software, a finite element simulation model of micro-milling thin-walled parts is established. Johnson-Cook material model and failure criterion are used to describe the material properties and damage criteria of the machined materials, so as to realize the prediction of milling force in the micro-milling process. The accuracy of the model is verified by experiments. Then, based on the birth-death element method, a deformation prediction model of micro-milling thin-walled parts model is established, and the milling force output from the finite element simulation model is loaded into the deformation prediction model. Finally, the deformation prediction of d micro-milling thin-walled parts is realized.

公开(公告)号：US20210095959A1

公开(公告)日：2021-04-01

申请号：US16647654

申请日：2019-05-15

Applicant: Dalian University of Technology

Inventor： Wei LIU ,  Bing LIANG ,  Mengde ZHOU ,  Kun LIU ,  Yang ZHANG ,  Di FENG ,  Xintong JIANG ,  Likun SI ,  Zhenyuan JIA

IPC: G01B21/04 ,  B25J9/16 ,  B25J19/02

Abstract: A 3D measurement model and the spatial calibration method based on a 1D displacement sensor are proposed. A 3D measurement system based on a fixed 1D displacement sensor is established; then a spatial measurement model based on the 1D displacement sensor is established; and then based on the high precision pose data of the measurement plane and sensor measurement data, spatial calibration constraint equation are established; a weighted iterative algorithms is employed to calculate the extrinsic parameters of the 1D sensor that meet the precision requirements, then the calibration process is completed. A high precision 3D measurement model is established; a 3D measurement model based on a 1D displacement sensor is established, and the calibration method of the measurement model is proposed, which will improve the precision of the 3D measurement model and solve the problem of inaccurate spatial measurement caused by the errors of the sensor extrinsic parameters.

公开(公告)号：US20200272134A1

公开(公告)日：2020-08-27

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：US20190299304A1

公开(公告)日：2019-10-03

申请号：US16465960

申请日：2018-05-17

Applicant: Dalian University of Technology

Inventor： Zhenyuan JIA ,  Fuji WANG ,  Zegang WANG ,  Meng ZHAO ,  Boyu ZHANG ,  Yu BAI

IPC: B23C5/18 ,  B23C5/10

Abstract: A special end cutting edge attached cutter for carbon fiber reinforced polymer/plastic with designable micro-tooth configuration, having an end cutting edge, a peripheral cutting edge with variation inverse helical groove, a peripheral cutting edge with constant inverse helical groove and a shank. Two parallel V-shaped chip pockets are designed on the end cutting edge of the cutter in two cutting edge directions which are symmetrical around a cutter axis as a center. The structure may enhance chip removal performance during high-speed milling of impenetrable slots and impenetrable windows, reduce wear of the end cutting edge, conduct configuration design for micro-teeth of the peripheral cutting edge, reduce the cutting thickness of the micro-tooth cutting edges, and effectively solve the problem of damage of the micro-tooth edges. A section of peripheral cutting edge with variation left-hand inverse helical flute angle is designed near the end cutting edge.