Patents by Inventor En-Sheng Chang
En-Sheng Chang 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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Patent number: 8899822Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.Type: GrantFiled: February 27, 2014Date of Patent: December 2, 2014Assignee: Industrial Technology Research InstituteInventors: Tzuo-Liang Luo, En-Sheng Chang, Jui-Kuan Lin, Yang-Xin Lin, Chin-Mou Hsu
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Publication number: 20140177381Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.Type: ApplicationFiled: February 27, 2014Publication date: June 26, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tzuo-Liang LUO, En-Sheng CHANG, Jui-Kuan LIN, Yang-Xin LIN, Chin-Mou HSU
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Patent number: 8696191Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.Type: GrantFiled: January 6, 2009Date of Patent: April 15, 2014Assignee: Industrial Technology Research InstituteInventors: Tzuo-Liang Luo, En-Sheng Chang, Jui-Kuan Lin, Yang-Xin Lin, Chin-Mou Hsu
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Patent number: 8523442Abstract: Disclosed is a supporting bearing for providing a large rotary module with an axial supporting force. The supporting bearing includes a body, a sliding track and a plurality of rolling members, wherein the sliding track is embedded in the body, and the rolling members are disposed so as to roll in the sliding track and to protrude from the top of the body, thereby providing higher precision and better rigidity to the large rotary module.Type: GrantFiled: May 4, 2011Date of Patent: September 3, 2013Assignee: Industrial Technology Research InstituteInventors: Shang-Te Chen, Chien-Chin Liao, En-Sheng Chang
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Patent number: 8516924Abstract: A harmonic drive includes a circular rigid internal gear, a circular flexible external gear, a wave generator, a cover, and a fan blade. The circular flexible external gear is disposed in the circular rigid internal gear, and the wave generator has at least one through hole and is disposed in the circular flexible external gear. The cover and the fan blade are respectively disposed at two opposite sides of the wave generator, and the cover is located in the circular flexible external gear. The cover and the wave generator form an air chamber together, and the through hole and an air flow opening are respectively in communication with the air chamber. The wave generator operates to drive the fan blade to operate. The fan blade rotates to generate an air flow, thus performing heat dissipation on the harmonic drive.Type: GrantFiled: March 28, 2011Date of Patent: August 27, 2013Assignee: Industrial Technology Research InstituteInventors: Dar-Jen Pen, Chun-Chien Ting, Jan-Hao Chen, En-Sheng Chang
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Patent number: 8210069Abstract: A wrist structure of a robot arm includes a forearm body, a first rotating assembly, a wrist body, and a second rotating assembly. The first rotating assembly is disposed in the forearm body and drives the wrist body to rotate with respect to the forearm body in a first rotation axis direction. The second rotating assembly is disposed in the wrist body and drives a workpiece to rotate with respect to the wrist body in a second rotation axis direction. The first rotating assembly has a first speed reducer directly connected to the wrist body, so as to directly drive the wrist body at a predetermined speed reduction ratio, thereby obtaining a predetermined torque.Type: GrantFiled: January 8, 2010Date of Patent: July 3, 2012Assignee: Industrial Technology Research InstituteInventors: Jan Hao Chen, En Sheng Chang, Chun Chien Ting
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Publication number: 20120141054Abstract: Disclosed is a supporting bearing for providing a large rotary module with an axial supporting force. The supporting bearing includes a body, a sliding track and a plurality of rolling members, wherein the sliding track is embedded in the body, and the rolling members are disposed so as to roll in the sliding track and to protrude from the top of the body, thereby providing higher precision and better rigidity to the large rotary module.Type: ApplicationFiled: May 4, 2011Publication date: June 7, 2012Inventors: Shang-Te CHEN, Chien-Chin Liao, En-Sheng Chang
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Publication number: 20120134762Abstract: A moving beam type machine tool is disclosed, having a dynamic phase balancing weight set and a spindle saddle. The spindle saddle has at least one X-axis location feedback device. When the spindle saddle along the X-axis traverse, the at least one X-axis location feedback device is able to locate the spindle saddle and inform a controlling unit. The controlling unit changes the output pressure of the dynamic phase balancing weight set depending on the location of the spindle saddle, so that a crossbeam is able to maintain in a balancing state. The moving beam type machine tool is able to increase accurate, sensitivity of pressure response, withstanding weight and balancing state.Type: ApplicationFiled: March 10, 2011Publication date: May 31, 2012Applicant: Industrial Technology Research InstituteInventors: Jen-Ji Wang, En-Sheng Chang, Chih-Ming Chen
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Publication number: 20120118092Abstract: A harmonic drive includes a circular rigid internal gear, a circular flexible external gear, a wave generator, a cover, and a fan blade. The circular flexible external gear is disposed in the circular rigid internal gear, and the wave generator has at least one through hole and is disposed in the circular flexible external gear. The cover and the fan blade are respectively disposed at two opposite sides of the wave generator, and the cover is located in the circular flexible external gear. The cover and the wave generator form an air chamber together, and the through hole and an air flow opening are respectively in communication with the air chamber. The wave generator operates to drive the fan blade to operate. The fan blade rotates to generate an air flow, thus performing heat dissipation on the harmonic drive.Type: ApplicationFiled: March 28, 2011Publication date: May 17, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Dar-Jen Pen, Chun-Chien Ting, Jan-Hao Chen, En-Sheng Chang
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Patent number: 7973260Abstract: A wire electrical discharge machine (WEDM) including a motion platform, a sink, a workbench, a connecting element, a jib, a first head and a second head is provided. The sink is disposed separately above the motion platform, and the workbench is disposed in the sink. The workbench is connected to the motion platform via the connecting element such that the motion platform drives the workbench moving along a first direction and a second direction. Besides, the jib is fixedly connected with the sink, and the first head is disposed inside the sink and connected with the jib. The second head is disposed above the first head. Thus, the jib does not cause relative motion to the sink in order to avoid leaking.Type: GrantFiled: April 9, 2008Date of Patent: July 5, 2011Assignee: Industrial Technology Research InstituteInventors: Tzuo-Liang Luo, Chin-Mou Hsu, En-Sheng Chang, Ching-Yuan Lin
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Publication number: 20110120255Abstract: A wrist structure of a robot arm includes a forearm body, a first rotating assembly, a wrist body, and a second rotating assembly. The first rotating assembly is disposed in the forearm body and drives the wrist body to rotate with respect to the forearm body in a first rotation axis direction. The second rotating assembly is disposed in the wrist body and drives a workpiece to rotate with respect to the wrist body in a second rotation axis direction. The first rotating assembly has a first speed reducer directly connected to the wrist body, so as to directly drive the wrist body at a predetermined speed reduction ratio, thereby obtaining a predetermined torque.Type: ApplicationFiled: January 8, 2010Publication date: May 26, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jan Hao Chen, En Sheng Chang, Chun Chien Ting
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Publication number: 20110076108Abstract: A swivel spindle head with gear device driven by multiple torque motors is disclosed, which comprises: a tool spindle, having a first shaft and a second shaft being radially disposed at two opposite sides of the tool spindle while sharing a common axial line; a plurality of torque motors, radially disposed at a side of the tool spindle; and a reduction gear set, radially disposed at a side of the tool spindle opposite to the plural torque motors, composed of a plurality of driving gears and a driven gear; wherein the amount of the plural driving gears is the same as that of the plural torque motors while enabling each of the plural driving gears to connect with a rotor shaft of its corresponding torque motor, and the same time, connecting the driven gear on the second shaft of the tool spindle.Type: ApplicationFiled: November 11, 2009Publication date: March 31, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chin-Mou Hsu, Ching-Yuan Lin, En-Sheng Chang, Shih-Yen Chung
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Patent number: 7909550Abstract: A swivel spindle head with gear device driven by multiple torque motors is disclosed, which comprises: a tool spindle, having a first shaft and a second shaft being radially disposed at two opposite sides of the tool spindle while sharing a common axial line; a plurality of torque motors, radially disposed at a side of the tool spindle; and a reduction gear set, radially disposed at a side of the tool spindle opposite to the plural torque motors, composed of a plurality of driving gears and a driven gear; wherein the amount of the plural driving gears is the same as that of the plural torque motors while enabling each of the plural driving gears to connect with a rotor shaft of its corresponding torque motor, and the same time, connecting the driven gear on the second shaft of the tool spindle.Type: GrantFiled: November 11, 2009Date of Patent: March 22, 2011Assignee: Industrial Technology Research InstituteInventors: Chin-Mou Hsu, Ching-Yuan Lin, En-Sheng Chang, Shih-Yen Chung
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Publication number: 20100103764Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.Type: ApplicationFiled: January 6, 2009Publication date: April 29, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tzuo-Liang LUO, En-Sheng Chang, Jui-Kuan Lin, Yang-Xin Lin, Chin-Mou Hsu
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Publication number: 20090194511Abstract: A wire electrical discharge machine (WEDM) including a motion platform, a sink, a workbench, a connecting element, a jib, a first head and a second head is provided. The sink is disposed separately above the motion platform, and the workbench is disposed in the sink. The workbench is connected to the motion platform via the connecting element such that the motion platform drives the workbench moving along a first direction and a second direction. Besides, the jib is fixedly connected with the sink, and the first head is disposed inside the sink and connected with the jib. The second head is disposed above the first head. Thus, the jib does not cause relative motion to the sink in order to avoid leaking.Type: ApplicationFiled: April 9, 2008Publication date: August 6, 2009Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: TZUO-LIANG LUO, CHIN-MOU HSU, EN-SHENG CHANG, CHING-YUAN LIN
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Patent number: 6930412Abstract: A closed box structure of a horizontal linear motor machine tool, comprising a frame, serving as a machine platform, carrying an X-movable part, a Y-movable part, and a Z-movable part, with said Y-movable part mounted on said X-movable part, said Z-movable part mounted on said Y-movable part, and said Z-movable part having a main axis head; characterized in that said frame, said X-movable part and said Y-movable part are shaped like open squares, said X-movable part, said Y-movable part and said Z-movable part each carry a set of two symmetrically adapted linear motors for being driven, wherein for each of said sets of linear motors magnetic forces are balanced against each other, so that deformations due to magnetic forces are avoided.Type: GrantFiled: January 16, 2003Date of Patent: August 16, 2005Inventors: En-Sheng Chang, Ching-Yuan Lin, Chin-Mou Hsu, Hsuan-Jen Kung
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Patent number: 6798088Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.Type: GrantFiled: November 7, 2002Date of Patent: September 28, 2004Assignee: Industrial Technology Research InstituteInventors: Chin-Mou Hsu, Hsuan-Jen Kung, En-Sheng Chang
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Publication number: 20040140721Abstract: A closed box structure of a horizontal linear motor machine tool, comprising a frame, serving as a machine platform, carrying an X-movable part, a Y-movable part, and a Z-movable part, with said Y-movable part mounted on said X-movable part, said Z-movable part mounted on said Y-movable part, and said Z-movable part having a main axis head; characterized in that said frame, said X-movable part and said Y-movable part are shaped like open squares, said X-movable part, said Y-movable part and said Z-movable part each carry a set of two symmetrically adapted linear motors for being driven, wherein for each of said sets of linear motors magnetic forces are balanced against each other, so that deformations due to magnetic forces are avoided.Type: ApplicationFiled: January 16, 2003Publication date: July 22, 2004Inventors: En-Sheng Chang, Ching-Yuan Lin, Chin-Mou Hsu, Hsuan-Jen Kung
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Patent number: 6740839Abstract: A transporting and positioning device for tool magazine of a bridge type machine tool comprises a pair of parallel guide-ways on a plate, a seat slidably mounted on the guide-ways for supporting the tool magazine, a drive mechanism including a cylinder, an extendable positioning shaft, a connection block adjacent the plate the connection block including a top hole and being fixed to the table, and a second cylinder having an extendable second positioning shaft; In an operating state of the machine tool, the second positioning shaft is actuated by the second cylinder to project an adjustable distance through the plate to urge against the seat for fastening the seat and the tool magazine. A tool change is performed after fastening the positioning shaft in the hole. The invention is also applicable to EDM.Type: GrantFiled: January 24, 2003Date of Patent: May 25, 2004Assignee: Industrial Technology Research InstituteInventors: Hsuan-Jen Kung, En-Sheng Chang, Chin-Mou Hsu
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Publication number: 20040090126Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.Type: ApplicationFiled: November 7, 2002Publication date: May 13, 2004Inventors: Chin-Mou Hsu, Hsuan-Jen Kung, En-Sheng Chang