Device case and method of manufacturing the same
US-9521771-B2 · Dec 13, 2016 · US
Laser joining method for galvanized steel sheets
US2018126492A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018126492-A1 |
| Application number | US-201715805614-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 7, 2017 |
| Priority date | Nov 8, 2016 |
| Publication date | May 10, 2018 |
| Grant date | — |
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Abstract
Official abstract text for this publication.
The laser irradiation step includes: removing zinc plating layers respectively disposed on the surfaces of the galvanized steel sheets by the laser irradiation; and melting the surfaces of the galvanized steel sheets of which the zinc plating layers have been removed, and the roller pressurizing step includes pressurizing the galvanized steel sheets by the rollers while the surfaces of the galvanized steel sheets that have been melted are in contact with each other such that the galvanized steel sheets are joined together.
First claim
Opening claim text (preview).
What is claimed is: 1 . A laser joining method for galvanized steel sheets comprising: a laser irradiation step in which mating surfaces of galvanized steel sheets are subjected to a laser irradiation such that the mating surfaces of the galvanized steel sheets are melted, the galvanized steel sheets respectively having surfaces coated with zinc; and a roller pressurizing step in which the galvanized steel sheets are pressurized by a roller to join the sheets together, wherein the laser irradiation step includes: removing zinc plating layers respectively disposed on the surfaces of the galvanized steel sheets by the laser irradiation; and melting the surfaces of the galvanized steel sheets of which the zinc plating layers have been removed, and the roller pressurizing step includes pressurizing the galvanized steel sheets by the roller while the surfaces of the galvanized steel sheets that have been melted are in contact with each other such that the galvanized steel sheets are joined together. 2 . The laser joining method for galvanized steel sheets according to claim 1 , wherein, in the laser irradiation step, a focal point of a laser beam in the laser irradiation is set at a position directly in front of a position where the galvanized steel sheets are subjected to pressurizing. 3 . The laser joining method for galvanized steel sheets according to claim 1 , wherein, in the laser irradiation step, the zinc plating layers are removed from a first region on the galvanized steel sheets by the laser irradiation, and then steel members of the galvanized steel sheets in a second region are melted by the laser irradiation, the second region being disposed in the first region and being smaller than the first region. 4 . The laser joining method for galvanized steel sheets according to claim 3 , wherein the roller pressurizing step further includes covering the first region with the steel members of the galvanized steel sheets having been melted by the laser irradiation. 5 . The laser joining method for galvanized steel sheets according to claim 1 , wherein in the laser irradiation step, an output of the laser irradiation is increased at a center part of a laser beam and lowered at a peripheral part of the laser beam. 6 . The laser joining method for galvanized steel sheets according to claim 1 , wherein the galvanized steel sheets having a difference in thickness are joined together. 7 . The laser joining method for galvanized steel sheets according to claim 1 , wherein an edge part of one of the galvanized steel sheets is joined to a surface of the other one of the galvanized steel sheets.
Assignees
Inventors
Classifications
combined with mechanical machining or metal-working covered by other subclasses than B23K · CPC title
- B23K26/26Primary
of rectilinear seams · CPC title
involving coated metal parts (using absorbing layers on the workpiece B23K26/18) · CPC title
- B23K20/04Primary
by means of a rolling mill · CPC title
Preliminary treatment · CPC title
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- What does patent US2018126492A1 cover?
- The laser irradiation step includes: removing zinc plating layers respectively disposed on the surfaces of the galvanized steel sheets by the laser irradiation; and melting the surfaces of the galvanized steel sheets of which the zinc plating layers have been removed, and the roller pressurizing step includes pressurizing the galvanized steel sheets by the rollers while the surfaces of the galv…
- Who is the assignee on this patent?
- Honda Motor Co Ltd, National Institute Of Tech
- What technology area does this patent fall under?
- Primary CPC classification B23K26/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu May 10 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).