公开(公告)号：US11219970B2

公开(公告)日：2022-01-11

申请号：US16043070

申请日：2018-07-23

Applicant: NHK SPRING CO., LTD.

Inventor： Naoki Tanaka

IPC: B23K37/04 ,  B23K26/244 ,  B23K101/36 ,  B23K26/22 ,  B23K26/06 ,  B23K26/08

Abstract: As first-time laser irradiation is performed on a workpiece, an initial nugget is formed. By emitting a laser beam for the second time at the initial nugget, a diameter of a back-side nugget portion is increased. A nugget includes a front-side nugget portion formed in a first plate, the back-side nugget portion formed in a second plate, and an annular flat surface portion. The flat surface portion is along a boundary portion between the first plate and the second plate. In a thicknesswise cross section of the second plate, a tilt angle of a peripheral surface of the back-side nugget portion is increased as a thicknesswise position of the peripheral surface approximates to a rear face of the second plate.

公开(公告)号：US09296070B2

公开(公告)日：2016-03-29

申请号：US13654759

申请日：2012-10-18

Applicant: NHK SPRING CO., LTD

Inventor： Akihiro Takei ,  Naoki Tanaka

IPC: B23K26/00 ,  G11B5/48 ,  B23K26/22

CPC classification number: G11B5/4833 ,  B23K26/22 ,  B23K37/0426 ,  B23K2101/36 ,  G01B5/24 ,  G11B5/4826

Abstract: A method manufactures a head suspension by laser-welding the flexure to the load beam at a first welding spot so that a tongue is pressed against a convex portion under predetermined load. The method includes step of forming, before joining the flexure and load beam together, at least one positioning reference hole in each of the flexure and load beam within a circular range that is defined around the first welding spot with a radius equal to a distance between the first welding spot and the projection, laying the flexure and load beam one on another, inserting reference pin into the reference holes, and laser-welding the flexure and load beam to each other at the first welding spot.

Abstract translation: 一种方法通过在第一焊接点处将挠曲件激光焊接到负载梁来制造头部悬架，使得舌片在预定负载下被压靠在凸部上。 该方法包括在将挠曲和负载梁结合在一起之前形成在弯曲和负载梁的每一个中的圆周范围内的至少一个定位参考孔的步骤，其围绕第一焊接点限定，半径等于 第一焊点和投影，将挠曲和负载梁放在另一个上，将参考销插入到参考孔中，并在第一焊接点处将弯曲和负载梁激光焊接到彼此。

公开(公告)号：US11759889B2

公开(公告)日：2023-09-19

申请号：US17505698

申请日：2021-10-20

Applicant: NHK SPRING CO., LTD.

Inventor： Naoki Tanaka

IPC: B23K26/22 ,  B23K26/06 ,  B23K37/04 ,  B23K101/36 ,  B23K26/244 ,  B23K26/08

CPC classification number: B23K26/22 ,  B23K26/0626 ,  B23K26/0876 ,  B23K26/244 ,  B23K37/0408 ,  B23K2101/36

Abstract: A method of welding a first metal plate and a second metal plate that is thicker than the first plate, by a laser beam. The first plate and the second plate are disposed to overlap one another in a thickness direction. In a first laser irradiation step, the laser beam is emitted at the first plate, to form an initial nugget including a front-side nugget portion in the first plate, a back-side nugget portion in the second plate and having a diameter smaller than a diameter of the front-side nugget portion, and an annular flat surface portion existing between the front-side nugget portion and the back-side nugget portion. In a subsequent laser irradiation step, the laser beam is emitted again at the initial nugget after the initial nugget is solidified, thereby increasing the diameter of the back-side nugget portion.

公开(公告)号：US11869549B2

公开(公告)日：2024-01-09

申请号：US18176800

申请日：2023-03-01

Applicant: NHK SPRING CO., LTD.

Inventor： Shinji Sugiyama ,  Naoki Tanaka ,  Kazuhiro Sugiyama ,  Shuntaro Numata

IPC: G11B5/48

CPC classification number: G11B5/4833 ,  G11B5/4873

Abstract: A suspension for a disk drive includes a plate member having a first surface, a second surface opposite to the first surface, a first penetration portion penetrating the first surface and the second surface, and a second penetration portion spaced from the first penetration portion and penetrating the first surface and the second surface, an actuator provided on the second surface and having an electrode located in the first penetration portion, and a flexure having an electrode connection portion connected to the electrode. The electrode connection portion includes a first region and a second region having a thickness smaller than a thickness of the first region, and the second region overlaps the second penetration portion.

公开(公告)号：US10141015B2

公开(公告)日：2018-11-27

申请号：US15001473

申请日：2016-01-20

Applicant: NHK SPRING CO., LTD.

Inventor： Akihiro Takei ,  Naoki Tanaka

IPC: B23K26/00 ,  B23D63/04 ,  G11B5/48 ,  B23K26/22 ,  B23K37/04 ,  G01B5/24 ,  B23K101/36

Abstract: A reference block which is machined from a single body of material and is a single block with reference pins integral therewith is configured for use in a method of manufacturing a head suspension by laser-welding the flexure to the load beam at a first welding spot so that a tongue is pressed against a convex portion under predetermined load. The method includes steps of forming, before joining the flexure and load beam together, at least one positioning reference hole in each of the flexure and load beam within a circular range that is defined around the first welding spot with a radius equal to a distance between the first welding spot and the projection, laying the flexure and load beam one on another, inserting the reference pins of the reference pin block into the reference holes, and laser-welding the flexure and load beam to each other at the first welding spot.

公开(公告)号：US09865285B2

公开(公告)日：2018-01-09

申请号：US15168907

申请日：2016-05-31

Applicant: NHK SPRING CO., LTD.

Inventor： Naoki Tanaka

IPC: G11B5/48 ,  B23K26/22 ,  B23K26/32 ,  B23K101/36

CPC classification number: G11B5/4826 ,  B23K26/22 ,  B23K26/32 ,  B23K2101/36 ,  G11B5/4853 ,  G11B5/486

Abstract: Provided is a wiring thin plate capable of securely hold-down the wiring thin plate around a scheduled portion to be a welded spot even if the wiring thin plate is downsized and involves widened wiring traces. The wiring thin plate includes a metal supporting layer, an insulating layer on the supporting layer, a wiring part having a plurality of wiring traces on the insulating layer, a scheduled portion defined on the supporting layer to be welded, and a protrusion formed on the supporting layer for the scheduled portion and having a height that is the same as a height of the wiring part.