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公开(公告)号：US08633418B2
公开(公告)日：2014-01-21
申请号：US12593038
申请日：2008-03-27
申请人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
发明人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
IPC分类号： B23K26/00
CPC分类号： H01T21/02 , B23K26/0622 , B23K26/28 , Y10T29/49002
摘要： There is provided manufacturing method of a spark plug that includes a center electrode and a ground electrode with a discharge gap left therebetween. At least one of the center electrode and the ground electrode has an electrode body containing a base metal and a noble metal tip welded to the electrode body. The spark plug manufacturing method includes a laser welding step for welding the noble metal tip and the electrode body by placing the noble metal tip at a given position on the electrode body, irradiating a pulsed laser onto the noble metal tip and the electrode body and thereby sequentially forming welding spots corresponding to pulses of the laser in a circumferential direction of the noble metal tip, wherein at least one of the laser pulses is an initially increasing type laser pulse having a laser intensity waveform in which a laser intensity increases with time during a predetermined initial period from a pulse start time.
摘要翻译： 提供了一种火花塞的制造方法，该火花塞包括中心电极和接地电极，其间具有放电间隙。 中心电极和接地电极中的至少一个具有包含焊接到电极体的基体金属和贵金属电极头的电极体。 火花塞的制造方法包括：激光焊接步骤，用于通过将贵金属电极头放置在电极体上的给定位置上来焊接贵金属电极头和电极体，将脉冲激光照射到贵金属电极头和电极体上 在贵金属电极头的圆周方向依次形成与激光脉冲相对应的焊点，其中至少一个激光脉冲是具有激光强度波形的初始增加型激光脉冲，激光强度波形在激光强度波形 从脉冲开始时间起的预定的初始周期。
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公开(公告)号：US20100101073A1
公开(公告)日：2010-04-29
申请号：US12593038
申请日：2008-03-27
申请人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
发明人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
IPC分类号： H01S4/00
CPC分类号： H01T21/02 , B23K26/0622 , B23K26/28 , Y10T29/49002
摘要： There is provided manufacturing method of a spark plug that includes a center electrode and a ground electrode with a discharge gap left therebetween. At least one of the center electrode and the ground electrode has an electrode body containing a base metal and a noble metal tip welded to the electrode body. The spark plug manufacturing method includes a laser welding step for welding the noble metal tip and the electrode body by placing the noble metal tip at a given position on the electrode body, irradiating a pulsed laser onto the noble metal tip and the electrode body and thereby sequentially forming welding spots corresponding to pulses of the laser in a circumferential direction of the noble metal tip, wherein at least one of the laser pulses is an initially increasing type laser pulse having a laser intensity waveform in which a laser intensity increases with time during a predetermined initial period from a pulse start time.
摘要翻译： 提供了一种火花塞的制造方法，该火花塞包括中心电极和接地电极，其间具有放电间隙。 中心电极和接地电极中的至少一个具有包含焊接到电极体的基体金属和贵金属电极头的电极体。 火花塞的制造方法包括：激光焊接步骤，用于通过将贵金属电极头放置在电极体上的给定位置上来焊接贵金属电极头和电极体，将脉冲激光照射到贵金属电极头和电极体上 在贵金属电极头的圆周方向依次形成与激光脉冲相对应的焊点，其中至少一个激光脉冲是具有激光强度波形的初始增加型激光脉冲，激光强度波形在激光强度波形 从脉冲开始时间起的预定的初始周期。
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公开(公告)号：US20060276097A1
公开(公告)日：2006-12-07
申请号：US10565902
申请日：2004-11-18
申请人： Akira Suzuki , Tomoaki Kato , Kazuyoshi Torii , Akikazu Taido
发明人： Akira Suzuki , Tomoaki Kato , Kazuyoshi Torii , Akikazu Taido
IPC分类号： H01T13/20
摘要： There is provided a method for producing a spark plug in which welding strength between a noble metal tip and an electrode joined by laser welding can be restrained from becoming weak. A noble metal tip (90) to be joined to a center electrode (2) or ground electrode of a spark plug to form a spark discharge gap is resistance-welded to each electrode containing no noble metal and then laser-welded. In the noble metal tip (90) exposed under a severe environment involving spark discharge, a molten portion (80) formed in such a manner that a portion of the noble metal tip (90) and a portion of the electrode are melted by laser welding and a non-molten portion (95) on the noble metal tip (90) side are apt to be peeled from each other in a boundary surface (83) between the molten portion (80) and the non-molten portion (95). The noble metal content in the molten portion (80) however becomes higher because a flange portion is formed in a bottom portion by pressing force applied on the noble metal tip (90) at the time of resistance welding and then irradiated with a laser beam. Accordingly, peeling can be prevented from occurring in the boundary surface (83).
摘要翻译： 提供一种用于制造火花塞的方法，其中可以抑制贵金属电极头和通过激光焊接接合的电极之间的焊接强度变弱。 要连接到火花塞的中心电极（2）或接地电极以形成火花放电间隙的贵金属端头（90）被电阻焊接到不含贵金属的每个电极上，然后被激光焊接。 在涉及火花放电的恶劣环境下露出的贵金属电极头（90）中，以使得贵金属电极头（90）的一部分和电极的一部分通过激光焊接而熔化的方式形成的熔融部（80） 并且在熔融部分（80）和非熔融部分（95）之间的边界表面（83）中，在贵金属端头（90）侧上的非熔融部分（95）易于彼此剥离。 然而，熔融部分（80）中的贵金属含量变高，因为通过在电阻焊接时施加在贵金属电极头（90）上的压力而在底部形成凸缘部分，然后用激光束照射。 因此，能够防止在边界面（83）发生剥离。
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公开(公告)号：US20080264371A1
公开(公告)日：2008-10-30
申请号：US12109753
申请日：2008-04-25
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
IPC分类号： F02P23/04
摘要： A laser ignition device for irradiating and condensing laser beams in a combustion chamber of an internal combustion engine so as to ignite fuel particles within the combustion chamber, includes: a laser beam generating unit for emitting the laser beams; and a condensing optical member for guiding the laser beams into the combustion chamber such that the laser beams are condensed in the combustion chamber, wherein the laser beam generating unit comprises a Beam Parameter Product (BPP) laser beam generating unit which emits the laser beams with a BPP value of no more than 20 mm·mrad (radius·half angle).
摘要翻译： 一种激光点火装置，其用于在内燃机的燃烧室内照射和冷凝激光束以点燃所述燃烧室内的燃料颗粒，所述激光点火装置包括：用于发射所述激光束的激光束产生单元; 以及聚光光学构件，用于将激光束引导到燃烧室中，使得激光束在燃烧室中冷凝，其中激光束产生单元包括发射激光束的光束参数产物（BPP）激光束产生单元， BPP值不大于20mm.mrad（半径角）。
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公开(公告)号：US08427038B2
公开(公告)日：2013-04-23
申请号：US13058472
申请日：2009-12-11
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
摘要： There are provided a spark plug in which a plating film applied to a ground electrode can be relatively easily removed, without cost increase, to prevent deterioration in ignition performance, and a process for producing the spark plug. A spark plug 1 has a metal shell 3, a ground electrode 27 made of a Ni alloy and a Ni plating layer 28 containing Ni as a main component and applied to surfaces of at least a rear end portion of the ground electrode 27 and of the metal shell 3. A Ni plating film 41 applied to a center-electrode-side part of a portion of the ground electrode 27 to be bent has been irradiated with a laser beam or the like, thereby forming a molten layer 29 in which metal materials of the Ni plating film 41 and the ground electrode 27 are molten together on the center-electrode-side part of the portion of the ground electrode 27 to be bent. The Ni plating layer 28 is formed on a part of the ground electrode 27 other than the part irradiated with the laser beam.
摘要翻译： 提供了一种火花塞，其中施加到接地电极的镀膜可以相对容易地去除而不增加成本，以防止点火性能的劣化，以及用于制造火花塞的工艺。 火花塞1具有金属壳3，由Ni合金制成的接地电极27和以Ni为主要成分的Ni镀层28，并被施加到接地电极27的至少后端部分的表面和 金属壳体3.用激光束等照射施加到待弯曲的接地电极27的一部分的中心电极侧部分的Ni镀膜41，从而形成熔融层29，其中金属材料 的Ni电镀膜41和接地电极27在接地电极27的部分的中心电极侧部分熔融在一起，以弯曲。 在除了被激光束照射的部分之外的接地电极27的一部分上形成有Ni镀层28。
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公开(公告)号：US20110148275A1
公开(公告)日：2011-06-23
申请号：US13058472
申请日：2009-12-11
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
摘要： There are provided a spark plug in which a plating film applied to a ground electrode can be relatively easily removed, without cost increase, to prevent deterioration in ignition performance, and a process for producing the spark plug. A spark plug 1 has a metal shell 3, a ground electrode 27 made of a Ni alloy and a Ni plating layer 28 containing Ni as a main component and applied to surfaces of at least a rear end portion of the ground electrode 27 and of the metal shell 3. A Ni plating film 41 applied to a center-electrode-side part of a portion of the ground electrode 27 to be bent has been irradiated with a laser beam or the like, thereby forming a molten layer 29 in which metal materials of the Ni plating film 41 and the ground electrode 27 are molten together on the center-electrode-side part of the portion of the ground electrode 27 to be bent. The Ni plating layer 28 is formed on a part of the ground electrode 27 other than the part irradiated with the laser beam.
摘要翻译： 提供了一种火花塞，其中施加到接地电极的镀膜可以相对容易地去除而不增加成本，以防止点火性能的劣化，以及用于制造火花塞的工艺。 火花塞1具有金属壳3，由Ni合金制成的接地电极27和以Ni为主要成分的Ni镀层28，并被施加到接地电极27的至少后端部分的表面和 金属壳体3.用激光束等照射施加到待弯曲的接地电极27的一部分的中心电极侧部分的Ni镀膜41，从而形成熔融层29，其中金属材料 的Ni电镀膜41和接地电极27在接地电极27的部分的中心电极侧部分熔融在一起，以弯曲。 在除了被激光束照射的部分之外的接地电极27的一部分上形成有Ni镀层28。
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公开(公告)号：US08399799B2
公开(公告)日：2013-03-19
申请号：US12594380
申请日：2008-03-31
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
IPC分类号： B23K26/00
摘要： A method for manufacturing a spark plug is a method for manufacturing the spark plug having an electrode base member and a noble metal tip welded thereto by means of a laser or an electrode base member, a tip base member joined thereto, and a noble metal tip welded to the tip bases material by means of a laser, and the method includes a laser welding process of welding the electrode base member or the tip base member to the noble metal tip by means of a laser and through use of a laser beam whose BBP value assumes 25 mm·mrad (a radius·a half angle) or less at a time point when a laser beam enters a transfer optical system for guiding the laser beam to areas to be welded where laser welding is to be performed.
摘要翻译： 一种用于制造火花塞的方法是一种用于制造火花塞的方法，所述火花塞具有通过激光或电极基底部件焊接在其上的电极基底部件和贵金属电极头，连接到其上的尖端基体部件和贵金属电极头 通过激光焊接到尖端基材上，该方法包括激光焊接工艺，该激光焊接工艺通过激光将电极基底部件或尖端基底部件焊接到贵金属焊嘴上，并通过使用BBP 在激光束进入用于将激光束引导到要进行激光焊接的区域的传递光学系统的时间点，假定为25mm·mrad（半径·半角）或更小。
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公开(公告)号：US20100116794A1
公开(公告)日：2010-05-13
申请号：US12594380
申请日：2008-03-31
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
IPC分类号： B23K26/00
摘要： A method for manufacturing a spark plug is a method for manufacturing the spark plug having an electrode base member and a noble metal tip welded thereto by means of a laser or an electrode base member, a tip base member joined thereto, and a noble metal tip welded to the tip bases material by means of a laser, and the method includes a laser welding process of welding the electrode base member or the tip base member to the noble metal tip by means of a laser and through use of a laser beam whose BBP value assumes 25 mm·mrad (a radius·a half angle) or less at a time point when a laser beam enters a transfer optical system for guiding the laser beam to areas to be welded where laser welding is to be performed.
摘要翻译： 一种用于制造火花塞的方法是一种用于制造火花塞的方法，所述火花塞具有通过激光或电极基底部件焊接在其上的电极基底部件和贵金属电极头，连接到其上的尖端基体部件和贵金属电极头 通过激光焊接到尖端基材上，该方法包括激光焊接工艺，该激光焊接工艺通过激光将电极基底部件或尖端基底部件焊接到贵金属焊嘴上，并通过使用BBP 在激光束进入用于将激光束引导到要进行激光焊接的区域的传递光学系统的时间点，假定为25mm·mrad（半径·半角）或更小。
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9.发明授权Method for securing a metal noble tip to an electrode of a spark plug using a resistance and laser welding process 有权一种使用电阻和激光焊接方法将金属高贵尖端固定到火花塞的电极的方法公开(公告)号：US07666047B2
公开(公告)日：2010-02-23
申请号：US10565902
申请日：2004-11-18
申请人： Akira Suzuki , Tomoaki Kato , Kazuyoshi Torii , Akikazu Taido
发明人： Akira Suzuki , Tomoaki Kato , Kazuyoshi Torii , Akikazu Taido
摘要： There is provided a method for producing a spark plug in which welding strength between a noble metal tip and an electrode joined by laser welding can be restrained from becoming weak.A noble metal tip (90) to be joined to a center electrode (2) or ground electrode of a spark plug to form a spark discharge gap is resistance-welded to each electrode containing no noble metal and then laser-welded. In the noble metal tip (90) exposed under a severe environment involving spark discharge, a molten portion (80) formed in such a manner that a portion of the noble metal tip (90) and a portion of the electrode are melted by laser welding and a non-molten portion (95) on the noble metal tip (90) side are apt to be peeled from each other in a boundary surface (83) between the molten portion (80) and the non-molten portion (95). The noble metal content in the molten portion (80) however becomes higher because a flange portion is formed in a bottom portion by pressing force applied on the noble metal tip (90) at the time of resistance welding and then irradiated with a laser beam. Accordingly, peeling can be prevented from occurring in the boundary surface (83).
摘要翻译： 提供一种用于制造火花塞的方法，其中可以抑制贵金属电极头和通过激光焊接接合的电极之间的焊接强度变弱。 要连接到火花塞的中心电极（2）或接地电极以形成火花放电间隙的贵金属端头（90）被电阻焊接到不含贵金属的每个电极上，然后被激光焊接。 在涉及火花放电的恶劣环境下露出的贵金属电极头（90）中，以使得贵金属电极头（90）的一部分和电极的一部分通过激光焊接而熔化的方式形成的熔融部（80） 并且在熔融部分（80）和非熔融部分（95）之间的边界表面（83）中，在贵金属端头（90）侧上的非熔融部分（95）易于彼此剥离。 然而，熔融部分（80）中的贵金属含量变高，因为通过在电阻焊接时施加在贵金属电极头（90）上的压力而在底部形成凸缘部分，然后用激光束照射。 因此，能够防止在边界面（83）发生剥离。
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