Implantable medical device construction
US-9220902-B2 · Dec 29, 2015 · US
Laser welding method
US2016354867A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016354867-A1 |
| Application number | US-201514891215-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 24, 2015 |
| Priority date | Feb 25, 2014 |
| Publication date | Dec 8, 2016 |
| Grant date | — |
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- Title
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Abstract
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A laser welding method of the present disclosure includes the step of irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece. The helical shape is a combination of a circular trajectory in which a laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part. Furthermore, first energy of the laser beam moving so as to have a component of the proceeding direction in the circular trajectory is larger than second energy of the laser beam moving so as to have a component of an opposite direction to the proceeding direction in the circular trajectory.
First claim
Opening claim text (preview).
1 . A laser welding method comprising: irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece, wherein the helical shape is a combination of a circular trajectory in which the laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part, and first energy of the laser beam moving so as to have a component of the proceeding direction in the circular trajectory is larger than second energy of the laser beam moving so as to have a component of an opposite direction to the proceeding direction in the circular trajectory. 2 . The laser welding method of claim 1 , wherein third energy of the laser beam in the proceeding direction in the circular trajectory is larger than fourth energy of the laser beam on an opposite side to the proceeding direction in the circular trajectory. 3 . The laser welding method of claim 1 , wherein third energy of the laser beam in the proceeding direction in the circular trajectory is smaller than fourth energy of the laser beam on an opposite side to the proceeding direction in the circular trajectory. 4 . A laser welding method comprising: irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece, wherein the helical shape is a combination of a circular trajectory in which the laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part, and third energy of the laser beam in the proceeding direction in the circular trajectory is larger than fourth energy of the laser beam in an opposite direction to the proceeding direction in the circular trajectory. 5 . A laser welding method comprising: irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece, wherein the helical shape is a combination of a circular trajectory in which the laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part, and third energy of the laser beam in the proceeding direction in the circular trajectory is smaller than fourth energy of the laser beam in an opposite direction to the proceeding direction in the circular trajectory. 6 . The laser welding method of claim 3 , wherein the workpiece is galvanized steel sheet. 7 . The laser welding method of claim 2 , wherein the third energy and the fourth energy are controlled by changing at least one of an output of the laser beam and a rotation speed of the laser beam in the circular trajectory. 8 . The laser welding method of claim 1 , wherein the first energy and the second energy are controlled by changing at least one of the output of the laser beam and the rotation speed of the laser beam in the circular trajectory. 9 . The laser welding method of claim 7 , wherein a waveform of the output of the laser beam has one of a rectangular shape, a trapezoidal shape, and a mountain shape.
Assignees
Inventors
Classifications
- B23K26/24Primary
Seam welding · CPC title
Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title
in at least two axial directions · CPC title
Non-ferrous metals or alloys · CPC title
Energy control of the laser beam (B23K26/0622 takes precedence) · CPC title
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- What does patent US2016354867A1 cover?
- A laser welding method of the present disclosure includes the step of irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece. The helical shape is a combination of a circular trajectory in which a laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part. Furthermore, first en…
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B23K26/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 08 2016 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).