Patents by Inventor Shinji Numata
Shinji Numata 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: 9434024Abstract: A laser cutting device includes a control unit which sets a steady oxygen concentration, a moving speed of a laser nozzle and laser beam steady control conditions based on a material and a plate thickness of the workpiece, decreases the moving speed of the laser nozzle to a first setting speed when the laser nozzle arrives a first setting position in front of an end point of a cutting trajectory, and decreases a relative moving speed of the laser nozzle to a second setting speed by varying the oxygen concentration of the cutting gas and the control condition of the laser beam when the laser nozzle arrives at a second setting position.Type: GrantFiled: October 17, 2012Date of Patent: September 6, 2016Assignee: Nissan Tanaka CorporationInventors: Shinji Numata, Hirotaka Kamikihara, Yoshimi Sano
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Patent number: 9126288Abstract: A laser cutting nozzle configured such that a laser beam is irradiated through a nozzle hole formed in a nozzle main body from an opening of the nozzle hole, and an assist gas surrounding the laser beam is emitted. The nozzle hole includes a first control flow path, a second control flow path, and a third control flow path formed in a coaxial cylindrical shape, in sequence from upstream toward downstream in a flow direction of the assist gas. If a diameter of the first control flow path is ?A, a diameter of the second control flow path is ?B, and a diameter of the third control flow path is ?C, an equation ?A<?C<?B is satisfied.Type: GrantFiled: February 21, 2011Date of Patent: September 8, 2015Assignee: NISSAN TANAKA CORPORATIONInventors: Masayuki Nagahori, Shinji Numata, Masafumi Itoyama
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Publication number: 20140246405Abstract: A laser cutting device includes a control unit which sets a steady oxygen concentration, a moving speed of a laser nozzle and laser beam steady control conditions based on a material and a plate thickness of the workpiece, decreases the moving speed of the laser nozzle to a first setting speed when the laser nozzle arrives a first setting position in front of an end point of a cutting trajectory, and decreases a relative moving speed of the laser nozzle to a second setting speed by varying the oxygen concentration of the cutting gas and the control condition of the laser beam when the laser nozzle arrives at a second setting position.Type: ApplicationFiled: October 17, 2012Publication date: September 4, 2014Inventors: Shinji Numata, Hirotaka Kamikihara, Yoshimi Sano
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Publication number: 20130015168Abstract: A laser cutting nozzle configured such that a laser beam is irradiated through a nozzle hole formed in a nozzle main body from an opening of the nozzle hole, and an assist gas surrounding the laser beam is emitted. The nozzle hole includes a first control flow path, a second control flow path, and a third control flow path formed in a coaxial cylindrical shape, in sequence from upstream toward downstream in a flow direction of the assist gas. If a diameter of the first control flow path is ?A, a diameter of the second control flow path is ?B, and a diameter of the third control flow path is ?C, an equation ?A<?C<?B is satisfied.Type: ApplicationFiled: February 21, 2011Publication date: January 17, 2013Applicant: NISSAN TANAKA CORPORATIONInventors: Masayuki Nagahori, Shinji Numata, Masafumi Itoyama
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Patent number: 8183499Abstract: A processing apparatus is provided in which a laser beam L2 is irradiated onto a processing portion of a workpiece W, and at the same time as the laser irradiation, an assist gas G is injected toward the processing portion from a nozzle 3 arranged concentric to the laser beam L2 so that the processing portion is covered with the assist gas G, thereby processing a piercing hole H on the processing portion. The apparatus includes control means 10 for processing a piercing hole H while moving the nozzle 3 within the range of 5 mm from a processing start point after the irradiation of the laser beam L2 is started.Type: GrantFiled: June 6, 2006Date of Patent: May 22, 2012Assignee: Nissan Tanaka CorporationInventors: Shinji Numata, Yoshimi Sano
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Publication number: 20090127239Abstract: A processing apparatus is provided in which a laser beam L2 is irradiated onto a processing portion of a workpiece W, and at the same time as the laser irradiation, an assist gas G is injected toward the processing portion from a nozzle 3 arranged concentric to the laser beam L2 so that the processing portion is covered with the assist gas G, thereby processing a piercing hole H on the processing portion. The apparatus includes control means 10 for processing a piercing hole H while moving the nozzle 3 within the range of 5 mm from a processing start point after the irradiation of the laser beam L2 is started.Type: ApplicationFiled: June 6, 2006Publication date: May 21, 2009Applicant: Nissan Tanaka CorporationInventors: Shinji Numata, Yoshimi Sano
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Patent number: 7238914Abstract: A laser processing apparatus has a first laser beam reversal apparatus which reverses the laser beam from the laser oscillator, and a second laser beam reversal apparatus which reverses the laser beam reversed by the first laser beam reversal apparatus, and guides the laser beam to the inside of the processing head, in which a first laser optical path which runs from the laser oscillator to the first laser beam reversal apparatus, a second laser optical path which runs form the first laser beam reversal apparatus to the second laser beam reversal apparatus, and a third laser optical path which runs from the second laser beam reversal apparatus to the processing head are parallel.Type: GrantFiled: April 29, 2005Date of Patent: July 3, 2007Assignee: Nissan Tanaka CorporationInventors: Masato Kawakita, Kouji Ishii, Shinji Numata, Kazuya Hirohashi
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Publication number: 20050274703Abstract: A laser processing apparatus has a first laser beam reversal apparatus which reverses the laser beam from the laser oscillator, and a second laser beam reversal apparatus which reverses the laser beam reversed by the first laser beam reversal apparatus, and guides the laser beam to the inside of the processing head, in which a first laser optical path which runs from the laser oscillator to the first laser beam reversal apparatus, a second laser optical path which runs form the first laser beam reversal apparatus to the second laser beam reversal apparatus, and a third laser optical path which runs from the second laser beam reversal apparatus to the processing head are parallel.Type: ApplicationFiled: April 29, 2005Publication date: December 15, 2005Inventors: Masato Kawakita, Kouji Ishii, Shinji Numata, Kazuya Hirohashi
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Patent number: 6492617Abstract: The present invention stably supplies a side blow gas to a piercing site and prevents the adherence of spatter to a cutting nozzle. A hood, which is attached to a side blow gas nozzle, guides side blow gas jetted from a side blow gas nozzle to the piercing site and prevents spatter from adhering to the cutting nozzle as laser beam and assist gas are respectively radiated or jetted onto a cutting material through a communicating hole.Type: GrantFiled: April 10, 2001Date of Patent: December 10, 2002Assignee: Tanaka Engineering Works, Ltd.Inventors: Masayuki Nagahori, Shinji Numata, Masato Kawakita
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Patent number: 6316743Abstract: In a piercing operation prior to the laser cutting of steel, etc., the development of a technology in which a piercing hole of the intended shape is obtained in a short time, even for a thick cut work. An oxygen gas coaxial to the laser beam applied towards the cut work and a low concentration gas with a low oxygen concentration and major components comprising nitrogen gas, air, or a mixture thereof discharged from an outer gas nozzle disposed so as to surround the outer side of the flow of this oxygen gas is supplied and disposed towards said cut work, and can realize shortening of the time, etc., of the piercing operation time by applying a laser beam to the cut work. In addition, a laser processing nozzle provided with an inner gas nozzle which discharges oxygen gas and an outer gas nozzle which discharges low concentration gas, and a laser cutting apparatus provided with this nozzle is provided.Type: GrantFiled: February 10, 1999Date of Patent: November 13, 2001Assignee: Tanaka Engineering Works, Ltd.Inventors: Masayuki Nagahori, Shinji Numata, Masato Kawakita
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Publication number: 20010029365Abstract: The present invention stably supplies a side blow gas to a piercing site and prevents the adherence of spatter to a cutting nozzle. A hood, which is attached to a side blow gas nozzle, guides side blow gas jetted from a side blow gas nozzle to the piercing site and prevents spatter from adhering to the cutting nozzle as laser beam and assist gas are respectively radiated or jetted onto a cutting material through a communicating hole.Type: ApplicationFiled: April 10, 2001Publication date: October 11, 2001Applicant: Tanaka Engineering Works, Ltd.Inventors: Masayuki Nagahori, Shinji Numata, Masato Kawakita