Patents by Inventor Jen-Ji Wang
Jen-Ji Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240157496Abstract: A method for facilitating analysis of causes of machining defects is provided. The method is carried out by a computer system. The method includes the step of obtaining motion data and vibration acceleration data about the tip of a cutter mounted on a machine tool. The method further includes the step of obtaining time-frequency information about the vibration acceleration data by performing a time-frequency analysis on the vibration acceleration data. The method further includes the step of obtaining vibration-displacement data by normalizing the time-frequency information. The method further includes the step of obtaining amplitude-distribution data about the tip by synchronizing the motion data and the vibration-displacement data.Type: ApplicationFiled: December 19, 2022Publication date: May 16, 2024Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chun-Ting CHEN, Jheng-Jie LIN, Chien-Chih LIAO, Jen-Ji WANG
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Patent number: 11754472Abstract: A process diagnosis system includes a digital twin calculation unit, a process diagnosis calculation unit, and a remote calculation analysis unit. The digital twin calculation unit obtains a vibration-related parameter and a cutting-related parameter of a processing device, and performs a simulation calculation for the vibration-related parameter, the cutting-related parameter and a three-dimensional model corresponding to the processing device to generate a three-dimensional calculation result. The process diagnosis calculation unit receives a three-dimensional calculation result and displays the three-dimensional calculation result. The remote calculation analysis unit receives the three-dimensional calculation result, and performs a simulation analysis for the three-dimensional calculation result to generate an analysis result.Type: GrantFiled: December 27, 2021Date of Patent: September 12, 2023Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Yi-Jin Lin, Shuo-Peng Liang, Chien-Chih Liao, Tzuo-Liang Luo, Wan-Kun Chang, Jen-Ji Wang
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Patent number: 11685008Abstract: A dodge method of machining path and a machining system is provided. By inserting a flag into an original machining path, an interference between the flag and a suction cup of a support unit is determined. A coding instruction is inserted at the interference to edit the original machining path, thereby generating an edited machining path. Therefore, when a machining equipment executes the edited machining path, the support unit may smoothly dodge a knife of the machining equipment.Type: GrantFiled: March 25, 2022Date of Patent: June 27, 2023Assignee: Industrial Technology Research InstituteInventors: Chun-Ting Chen, Cheng-Wei Wang, Po-Hsun Wu, Chien-Chih Liao, Jen-Ji Wang
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Patent number: 11675337Abstract: A system for acceleration adjustment of machine tool at rapid traverse includes a signal measurement module, a signal judgment module and an acceleration optimization module. The machine tool has a servo motor and a working platform. The signal measurement module measures signals while the servo motor drives the working platform from a first specific position to a second specific position, or from the second specific position back to the first specific position. The signal judgment module judges whether the actual maximum current value of the motor is equal to the manufacturer's specification according to the signals; and if negative, the acceleration optimization module calculates and optimizes an axial acceleration till an optimal value is achieved. Then, a curve smoothing time of the optimal acceleration is calculated and optimized by the acceleration optimization module. In addition, a method for acceleration adjustment of machine tool at rapid traverse is provided.Type: GrantFiled: April 12, 2021Date of Patent: June 13, 2023Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jheng-Jie Lin, Kuo-Hua Chou, Chien-Chih Liao, Jen-Ji Wang
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Publication number: 20230168155Abstract: A process diagnosis system includes a digital twin calculation unit, a process diagnosis calculation unit, and a remote calculation analysis unit. The digital twin calculation unit obtains a vibration-related parameter and a cutting-related parameter of a processing device, and performs a simulation calculation for the vibration-related parameter, the cutting-related parameter and a three-dimensional model corresponding to the processing device to generate a three-dimensional calculation result. The process diagnosis calculation unit receives a three-dimensional calculation result and displays the three-dimensional calculation result. The remote calculation analysis unit receives the three-dimensional calculation result, and performs a simulation analysis for the three-dimensional calculation result to generate an analysis result.Type: ApplicationFiled: December 27, 2021Publication date: June 1, 2023Inventors: Yi-Jin LIN, Shuo-Peng LIANG, Chien-Chih LIAO, Tzuo-Liang LUO, Wan-Kun CHANG, Jen-Ji WANG
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Patent number: 11654522Abstract: A method for analyzing an overcutting defect of a machining process comprises steps as following. A machining code is executed to generate a cutting face, wherein the cutting face comprises a plurality of machining paths. A specified machining path is defined from the plurality of machining paths and a specified node is set on the specified machining path. A sectional plane passing through the specified node is calculated. A plurality of intersection points between the sectional plane and the other machining paths which are different from the specified machining path are obtained. A first adjacent intersection point a second adjacent intersection point are specified from the intersection points. A connection line located between the first adjacent intersection point and the second adjacent intersection point is obtained. A distance between the specified node and connection line is calculate and the distance is defined as an overcutting amount of the specified node.Type: GrantFiled: February 18, 2021Date of Patent: May 23, 2023Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Chih Liao, Kuo-Hua Chou, Cheng-Wei Wang, Jen-Ji Wang
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Patent number: 11577389Abstract: A method for reducing vibration of a robot arm includes: a step of mounting at least one inertia actuator and at least one vibration signal capturing unit to a processing end of a robot arm; a step of applying the at least one vibration signal capturing unit to detect a vibration generated at the processing end of the robot arm so as to generate a vibration signal; a step of applying a central processing unit to evaluate the vibration signal and coordinates of the processing end of the robot arm so as to capture at least one set of corresponding control parameters for calculating at least one output force; and, a step of having the inertia actuator to apply the output force to the processing end of the robot arm for counteracting the vibration at the processing end of the robot arm.Type: GrantFiled: July 15, 2020Date of Patent: February 14, 2023Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hung-I Lu, Jen-Ji Wang, Chien-Chih Liao
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Publication number: 20220214664Abstract: A system for acceleration adjustment of machine tool at rapid traverse includes a signal measurement module, a signal judgment module and an acceleration optimization module. The machine tool has a servo motor and a working platform. The signal measurement module measures signals while the servo motor drives the working platform from a first specific position to a second specific position, or from the second specific position back to the first specific position. The signal judgment module judges whether the actual maximum current value of the motor is equal to the manufacturer's specification according to the signals; and if negative, the acceleration optimization module calculates and optimizes an axial acceleration till an optimal value is achieved. Then, a curve smoothing time of the optimal acceleration is calculated and optimized by the acceleration optimization module. In addition, a method for acceleration adjustment of machine tool at rapid traverse is provided.Type: ApplicationFiled: April 12, 2021Publication date: July 7, 2022Inventors: JHENG-JIE LIN, KUO-HUA CHOU, CHIEN-CHIH LIAO, JEN-JI WANG
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Publication number: 20220212304Abstract: A method for analyzing an overcutting defect of a machining process comprises steps as following. A machining code is executed to generate a cutting face, wherein the cutting face comprises a plurality of machining paths. A specified machining path is defined from the plurality of machining paths and a specified node is set on the specified machining path. A sectional plane passing through the specified node is calculated. A plurality of intersection points between the sectional plane and the other machining paths which are different from the specified machining path are obtained. A first adjacent intersection point a second adjacent intersection point are specified from the intersection points. A connection line located between the first adjacent intersection point and the second adjacent intersection point is obtained. A distance between the specified node and connection line is calculate and the distance is defined as an overcutting amount of the specified node.Type: ApplicationFiled: February 18, 2021Publication date: July 7, 2022Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Chih LIAO, Kuo-Hua CHOU, Cheng-Wei WANG, Jen-Ji WANG
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Publication number: 20220176504Abstract: A method for adjusting a workpiece-supporting module includes: setting initial support position information of a workpiece, the initial support position information including positions of support devices and a spacing value for separating the support devices; according to the initial support position information, applying a finite element method to analyze a CAD file of the workpiece to obtain workpiece deformation information; according to the workpiece deformation information and target workpiece deformation information, realizing support position information corresponding to each support device, the support position information including X-axis coordinates and Y-axis coordinates; according to the support position information and a conversion program, obtaining a Z-axis coordinate and a normal vector of each support devices; and, according to the support position information, the Z-axis coordinate and the normal vector, adjusting the position and the angle of each support device.Type: ApplicationFiled: April 8, 2021Publication date: June 9, 2022Inventors: CHUN-TING CHEN, CHIEN-CHIH LIAO, PEI-YIN CHEN, JEN-JI WANG, YU-SHENG LAI
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Patent number: 11298787Abstract: An adjustable workpiece support system includes an adjustable support apparatus, an analysis support point module, a coordinate post-processing module and a control module. The adjustable support apparatus has a group of support devices for supporting a supported workpiece, the each support device being adjustable in height and angle. The analysis support point module is used to import a computer-aided design file of the supported workpiece, and analyze the computer-aided design file to obtain a group of support points of the supported workpiece. The coordinate post-processing module is configured to calculate the support coordinates of the each support device corresponding to the group of support points. The control module is configured to receive the support coordinates of the each support device, and adjust the height and angle of the each support device to support the supported workpiece, so that the amount of deformation of the supported workpiece is the minimum.Type: GrantFiled: February 28, 2020Date of Patent: April 12, 2022Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chun-Ting Chen, Chien-Chih Liao, Pei-Yin Chen, Bo-Jyun Jhang, Jen-Ji Wang
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Publication number: 20210299864Abstract: A method for reducing vibration of a robot arm includes: a step of mounting at least one inertia actuator and at least one vibration signal capturing unit to a processing end of a robot arm; a step of applying the at least one vibration signal capturing unit to detect a vibration generated at the processing end of the robot arm so as to generate a vibration signal; a step of applying a central processing unit to evaluate the vibration signal and coordinates of the processing end of the robot arm so as to capture at least one set of corresponding control parameters for calculating at least one output force; and, a step of having the inertia actuator to apply the output force to the processing end of the robot arm for counteracting the vibration at the processing end of the robot arm.Type: ApplicationFiled: July 15, 2020Publication date: September 30, 2021Inventors: HUNG-I LU, JEN-JI WANG, CHIEN-CHIH LIAO
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Patent number: 11119465Abstract: A method for inspecting defects of a machining path is provided. The method includes the following steps. Firstly, a contour mold with a plurality of surface nodes is generated according to a machining program code. Next, a normal vector of each surface node of the contour mold is calculated. Then, a tangent vector of a block of the machining program code corresponding to the normal vector is calculated. Afterwards, an error information is obtained according to a relation between the normal vector and the tangent vector. When the error information is greater than a predetermined value, a defect information is shown on the contour mold.Type: GrantFiled: May 13, 2020Date of Patent: September 14, 2021Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cheng-Wei Wang, Kuo-Hua Chou, Chien-Chih Liao, Jen-Ji Wang
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Publication number: 20210208565Abstract: A method for inspecting defects of a machining path is provided. The method includes the following steps. Firstly, a contour mold with a plurality of surface nodes is generated according to a machining program code. Next, a normal vector of each surface node of the contour mold is calculated. Then, a tangent vector of a block of the machining program code corresponding to the normal vector is calculated. Afterwards, an error information is obtained according to a relation between the normal vector and the tangent vector. When the error information is greater than a predetermined value, a defect information is shown on the contour mold.Type: ApplicationFiled: May 13, 2020Publication date: July 8, 2021Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cheng-Wei WANG, Kuo-Hua CHOU, Chien-Chih LIAO, Jen-Ji WANG
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Publication number: 20210154781Abstract: An adjustable workpiece support system includes an adjustable support apparatus, an analysis support point module, a coordinate post-processing module and a control module. The adjustable support apparatus has a group of support devices for supporting a supported workpiece, the each support device being adjustable in height and angle. The analysis support point module is used to import a computer-aided design file of the supported workpiece, and analyze the computer-aided design file to obtain a group of support points of the supported workpiece. The coordinate post-processing module is configured to calculate the support coordinates of the each support device corresponding to the group of support points. The control module is configured to receive the support coordinates of the each support device, and adjust the height and angle of the each support device to support the supported workpiece, so that the amount of deformation of the supported workpiece is the minimum.Type: ApplicationFiled: February 28, 2020Publication date: May 27, 2021Inventors: CHUN-TING CHEN, CHIEN-CHIH LIAO, PEI-YIN CHEN, BO-JYUN JHANG, JEN-JI WANG
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Patent number: 10838403Abstract: A simulation method for milling by use of a dynamic position error includes the steps of: (a) generating a milling surface from a numerical control code, the milling surface having a plurality of grid points, the numerical control code having a position command; (b) calculating a normal vector for each of the plurality of grid points on the milling surface; (c) feeding back a position feedback of each of the plurality of grid points by the controller of the machine tool, and deriving a corresponding three-axis dynamic position error of the milling surface according to the position command and the position feedback; (d) calculating a component of the normal vector for the three-axis dynamic position error so as to obtain a normal-vector error value of the corresponding grid point; and, (e) displaying undercutting information of the normal-vector error value of the corresponding grid point on the milling surface.Type: GrantFiled: December 21, 2018Date of Patent: November 17, 2020Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cheng-Wei Wang, Kuo-Hua Chou, Chien-Chih Liao, Jen-Ji Wang
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Publication number: 20200218225Abstract: A method of load characteristic identification and acceleration adjustment for a machine tool is provided. A first acceleration of a transmission system is set according to the weight of a workpiece, and the working platform and the workpiece are driven at the first acceleration. A first elastic deformation of the transmission system and an amount of first position error of the transmission system are calculated when transmission system is moved at the first acceleration. A dynamic error is calculated according to the first elastic deformation and the first position error. When the dynamic error is less than or greater than a target error, a second acceleration is set to the transmission system, and a second elastic deformation and a second position error are calculated when the transmission system moves at the second acceleration unit the dynamic error is converged to the target error.Type: ApplicationFiled: March 13, 2019Publication date: July 9, 2020Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jheng-Jie LIN, Kuo-Hua CHOU, Chien-Chih LIAO, Jen-Ji WANG
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Patent number: 10698383Abstract: A method of load characteristic identification and acceleration adjustment for a machine tool is provided. A first acceleration of a transmission system is set according to the weight of a workpiece, and the working platform and the workpiece are driven at the first acceleration. A first elastic deformation of the transmission system and an amount of first position error of the transmission system are calculated when transmission system is moved at the first acceleration. A dynamic error is calculated according to the first elastic deformation and the first position error. When the dynamic error is less than or greater than a target error, a second acceleration is set to the transmission system, and a second elastic deformation and a second position error are calculated when the transmission system moves at the second acceleration unit the dynamic error is converged to the target error.Type: GrantFiled: March 13, 2019Date of Patent: June 30, 2020Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jheng-Jie Lin, Kuo-Hua Chou, Chien-Chih Liao, Jen-Ji Wang
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Publication number: 20200166906Abstract: A simulation method for milling by use of a dynamic position error includes the steps of: (a) generating a milling surface from a numerical control code, the milling surface having a plurality of grid points, the numerical control code having a position command; (b) calculating a normal vector for each of the plurality of grid points on the milling surface; (c) feeding back a position feedback of each of the plurality of grid points by the controller of the machine tool, and deriving a corresponding three-axis dynamic position error of the milling surface according to the position command and the position feedback; (d) calculating a component of the normal vector for the three-axis dynamic position error so as to obtain a normal-vector error value of the corresponding grid point; and, (e) displaying undercutting information of the normal-vector error value of the corresponding grid point on the milling surface.Type: ApplicationFiled: December 21, 2018Publication date: May 28, 2020Inventors: CHENG-WEI WANG, KUO-HUA CHOU, CHIEN-CHIH LIAO, JEN-JI WANG
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Patent number: 10613511Abstract: A tool machine servo control simulation device and an establishing method of structure model are provided. The tool machine servo control simulation device includes a structure model and a processor. The structure model includes a position function, a velocity function and a drive property parameter. The processor includes a control signal receiver and a simulation component. The control signal receiver is used for receiving a servo command. The simulation component, response to the servo command, generates a simulation path according to the position function, the velocity function and the drive property parameter.Type: GrantFiled: December 22, 2017Date of Patent: April 7, 2020Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jheng-Jie Lin, Jen-Ji Wang, Kuo-Hua Chou, Chien-Chih Liao, Hsiao-Chen Ho