公开(公告)号：US20150266131A1

公开(公告)日：2015-09-24

申请号：US14659994

申请日：2015-03-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei OGURA ,  Yuta IWAMOTO ,  Atsushi KAWAKITA ,  Hiroaki KISHI

IPC: B23K26/03 ,  B23K31/12

CPC classification number: B23K26/032 ,  B23K26/22 ,  B23K31/125

Abstract: Provided is a laser welding inspection apparatus capable of improving the accuracy for determining the welding defect. The laser welding inspection apparatus includes a head which irradiates a welded portion of a workpiece with a laser beam for inspection, an optical receiver which receives a return light of the laser beam for inspection from the welded portion, an optical system which adjusts at least a focal diameter of the laser beam for inspection applied to the welded portion and a region where the return light from the welded portion is recognized, and a controller which controls the optical system and determines, based on intensity of the return light, whether a welding defect exists in the welded portion. The controller controls the optical system so that a diameter of the region is not more than 1.5 times as large as the focal diameter.

Abstract translation: 提供能够提高确定焊接缺陷的精度的激光焊接检查装置。 激光焊接检查装置包括：用激光束照射工件的焊接部分进行检查的头部;接收来自焊接部分的用于检查的激光束的返回光的光接收器;至少调整 用于检查的激光束的焦距被施加到焊接部分和识别来自焊接部分的返回光的区域;以及控制器，其控制光学系统，并且基于返回光的强度确定焊接缺陷 存在于焊接部。 控制器控制光学系统，使得该区域的直径不超过焦点直径的1.5倍。

公开(公告)号：US20160052091A1

公开(公告)日：2016-02-25

申请号：US14781129

申请日：2014-03-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Keisuke UCHIDA ,  Masashi FURUKAWA ,  Hiroomi KOBAYASHI ,  Atsushi KAWAKITA ,  Shuhei OGURA ,  Hiroaki KISHI ,  Eiji AKAMATSU ,  Yuta IWAMOTO

IPC: B23K31/12 ,  B23K26/03 ,  G01B11/30 ,  B23K26/21

CPC classification number: B23K31/125 ,  B23K26/03 ,  B23K26/21 ,  B23K26/24 ,  G01B11/30

Abstract: A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces that are molten by radiation of the welding laser beam, a returned light beam (L2) including reflection light from the molten pool, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity of a returned light beam received in a first region inside the molten pool which is relatively close to a given point and an intensity of a returned light beam received in a second region inside the molten pool which is relatively spaced from the given point.

Abstract translation: 焊接激光束（L1）沿着设置在工件（W1，W2）中的焊接轨迹（C11，C12）辐射，或者沿着设置在熔池中的扫描位置（C51，C52）辐射检查激光束（L5） Y1）通过焊接激光束的辐射而熔融的工件，包括来自熔池的反射光的返回光束（L2），由于熔融和蒸发而产生的蒸汽光，以及从 接收熔融池，并且基于接收在熔池内的第一区域中接收的返回光束的强度来检查工件的焊接部分的焊接状态，所述第一区域相对接近给定点，并且返回的强度 光束被容纳在与给定点相对间隔的熔池内部的第二区域中。

公开(公告)号：US20150266132A1

公开(公告)日：2015-09-24

申请号：US14660178

申请日：2015-03-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi KAWAKITA ,  Shuhei OGURA ,  Yuta IWAMOTO ,  Hiroaki KISHI ,  Nobuhiro IIJIMA

IPC: B23K26/03 ,  B23K26/24

CPC classification number: B23K26/032 ,  B23K26/22 ,  B23K26/24

Abstract: Provided is a laser beam welding apparatus capable of correctly detecting the beginning and the end of one welding point even in remote laser beam welding. The laser beam welding apparatus includes a head which irradiates a workpiece with a laser beam, an optical receiver which receives a reflected light of the laser beam from the workpiece, and a controller. The optical receiver receives only a laser beam and a plasma of the reflected light. The controller determines that one welding point begins when a time during which intensity of the reflected light is larger than or equal to a second set-intensity is longer than or equal to a first set-time, and determines that the one welding point ends when a time during which the intensity of the reflected light is smaller than or equal to a first set-intensity is longer than or equal to a second set-time.

Abstract translation: 提供了即使在远程激光束焊接中也能够正确地检测一个焊接点的开始和结束的激光束焊接装置。 激光束焊接装置包括用激光束照射工件的头部，接收来自工件的激光束的反射光的光接收器和控制器。 光接收器仅接收激光束和反射光的等离子体。 当反射光的强度大于或等于第二设定强度的时间大于或等于第一设定时间时，控制器确定一个焊接点开始，并且确定一个焊接点在 反射光的强度小于或等于第一设定强度的时间长于或等于第二设定时间。

公开(公告)号：US20210180671A1

公开(公告)日：2021-06-17

申请号：US17102678

申请日：2020-11-24

Applicant: AICHI STEEL CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takayoshi SUGIURA ,  Yuta IWAMOTO ,  Naoki FUKUDA ,  Yasuhiro FUKUDA ,  Masaaki KONDO

IPC: F16H48/08 ,  C22C38/02 ,  C22C38/04 ,  C22C38/28 ,  C22C38/06 ,  C22C38/32

Abstract: A differential hypoid gear, a pinion gear, and paired hypoid gears formed by a combination thereof are provided. The differential hypoid gear includes a ring-shaped main body and a tooth-forming surface, and has a chemical component composition including C: 0.15-0.30 mass %, Si: 0.55-1.00 mass %, Mn: 0.50-1.20 mass %, Cr: 0.50-1.50 mass %, Al: 0.020-0.080 mass %, B: 0.0005-0.0050 mass %, Ti: 0.01-0.08 mass %, N: 0.0020-0.0100 mass %, Mo: 0.25 mass % or less, and Nb: less than 0.10 mass %, the remainder being Fe and unavoidable impurities. The chemical component composition satisfies Formulae 1 and 2. The differential hypoid gear has a metallographic structure including mainly tempered martensite. A martensite ratio at an inside of a dedendum differs between an end portion of a tooth and a central portion of the tooth within a range of 15% or less. A core hardness of the dedendum at the central portion falls within 350-500 HV.

公开(公告)号：US20160061727A1

公开(公告)日：2016-03-03

申请号：US14780584

申请日：2014-03-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroomi KOBAYASHI ,  Masashi FURUKAWA ,  Keisuke UCHIDA ,  Yoshinori SHIBATA ,  Atsushi KAWAKITA ,  Hiroaki KISHI ,  Eiji AKAMATSU ,  Yuta IWAMOTO

IPC: G01N21/55 ,  G01N33/20

CPC classification number: G01N21/55 ,  B23K26/032 ,  B23K26/082 ,  B23K26/22 ,  G01N33/206

Abstract: A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces (W1, W2) that are molten by radiation of the welding laser beam (L1), a returned light beam (L2) including reflection light from the molten pool (Y1) of the workpieces, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool (Y1) of the workpieces is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity change of the returned light beam (L2) thus received.

Abstract translation: 焊接激光束（L1）沿着设置在工件（W1，W2）中的焊接轨迹（C11，C12）辐射，或者沿着设置在熔池中的扫描位置（C51，C52）辐射检查激光束（L5） Y1）通过焊接激光束（L1）的辐射熔融的工件（W1，W2），包括来自工件的熔池（Y1）的反射光的返回光束（L2），由于 工件的熔化和蒸发以及从工件的熔池（Y1）发射的热辐射光，并且基于返回的光束（L2）的强度变化来检查工件的焊接部分的焊接状态 ）。

公开(公告)号：US20150246413A1

公开(公告)日：2015-09-03

申请号：US14616869

申请日：2015-02-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi KAWAKITA ,  Shuhei OGURA ,  Hiroaki KISHI ,  Yuta IWAMOTO

IPC: B23K26/03 ,  B23K26/24 ,  B23K31/12 ,  G01J1/42

CPC classification number: B23K26/032 ,  B23K26/082 ,  B23K26/22 ,  B23K31/125 ,  G01J1/42

Abstract: A welded portion inspection method accurately identifies emitted light from a molten portion during inspection laser light irradiation, enabling reliable inspection. When transitioning from welding laser light irradiation to inspection laser light irradiation, the welding laser light irradiation is interrupted and then the welding laser light is switched to the inspection laser light. In inspecting a welded portion, two points in time at which the emitted light intensity is equal to or less than a certain threshold value are extracted from an intensity waveform of the emitted light as an inspection start point in time and an inspection end point in time. The interval between the inspection start and end points is estimated as being a irradiation period of the inspection laser light. The welded state is inspected based on the intensity waveform of the emitted light in the irradiation period.

Abstract translation: 焊接部分检查方法在检查激光照射期间精确地识别来自熔融部分的发射光，从而能够可靠地检查。 当从焊接激光照射到检查激光照射的过渡时，中断焊接激光照射，然后将焊接激光切换到检查激光。 在检查焊接部分时，从发射光的强度波形中提取发射光强度等于或小于某一阈值的两个时间点作为检查开始时间点和检查终点时间 。 检查开始和结束点之间的间隔被估计为检查激光的照射周期。 基于照射期间的发射光的强度波形来检查焊接状态。