公开(公告)号：US20170326676A1

公开(公告)日：2017-11-16

申请号：US15524029

申请日：2015-11-05

Applicant: DENSO CORPORATION

Inventor： Hideaki SHIRAI ,  Tsuyoshi HAYAKAWA ,  Yuusuke KATAOKA

IPC: B23K10/02 ,  B23K9/10 ,  B23K9/28 ,  B23K9/32

CPC classification number: B23K10/02 ,  B23K9/1006 ,  B23K9/167 ,  B23K9/28 ,  B23K9/296 ,  B23K9/324 ,  B23K9/325 ,  B23K10/006 ,  B23K37/0235

Abstract: Arc welding equipment for joining the objects at high speed and for reducing the strain of the objects after being joined is provided. The nozzle housing an electrode forming arc plasma is formed from a gas supply part and a gas suction part. The gas supply part has gas supply holes supplying gas outward in a radial direction of the arc plasma. The gas suction part suctions the gas supplied form the gas supply part. A pair of the gas supply holes, which are disposed so that the electrode is disposed therebetween, supply the gas of a first pressure to a position away from the electrode by a first distance. A pair of the gas supply holes, which are disposed so that the electrode is disposed therebetween other than the pair of the gas supply holes, supply the gas of a second pressure to a position away from the electrode by a second distance. The second distance is longer than the first distance. The gas of the second pressure is lower than that of the first pressure. Thereby, the arc plasma is compressed in a direction connecting the gas supply holes, and the arc plasma becomes long in a direction connecting the gas supply holes.

公开(公告)号：US20210069828A1

公开(公告)日：2021-03-11

申请号：US17087958

申请日：2020-11-03

Applicant: DENSO CORPORATION

Inventor： Noritsugu KATO ,  Shigeyuki KUSANO ,  Yuki KATO ,  Tsuyoshi HAYAKAWA

IPC: B23K26/28 ,  B23K26/067 ,  B23K26/06 ,  B23K26/082

Abstract: An adjustment of the amount of energy in at least one specific applying unit is executed when energy is applied to a cylindrical member pair in which another cylindrical member is inserted inside a cylindrical member to melt and weld the cylindrical member pair in a circumferential direction. The adjustment is executed in association with a rotation angle to satisfy a relationship of Pd+Pw>θ, wherein Pd is an output decease rotation angle that decreases the energy amount from a steady energy amount HP applied from the specific applying unit in a welding end process, Pw is an overlap rotation angle at which the irradiation parts around the cylindrical member pair overlap with the steady energy amount HP, and θ is a separation angle between the specific applying unit and another applying unit adjacent to each other in a rotation direction around the axis.