Laser assisted surface finishing apparatus and method
US-2019184521-A1 · Jun 20, 2019 · US
Surface treatment method
US12434349B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12434349-B2 |
| Application number | US-202117370368-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 8, 2021 |
| Priority date | Jul 13, 2020 |
| Publication date | Oct 7, 2025 |
| Grant date | Oct 7, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
A surface treatment method includes a step of irradiating a workpiece with a pulsed laser beam through a transparent liquid and a step of causing particles to collide with a heat-affected layer developed on a surface layer portion of the workpiece in the step of irradiating. The particles each has a core made of an elastic body and abrasive grains provided on a surface of the core.
First claim
Opening claim text (preview).
What is claimed is: 1. A surface treatment method comprising: a step of irradiating a workpiece with a pulsed laser beam through a transparent liquid; and a step of causing particles each having a core made of an elastic body and abrasive grains provided on a surface of the core to collide with a heat-affected layer developed on a surface layer portion of the workpiece in the step of irradiation, wherein the step of causing collision includes: causing the particles to collide with a surface of the workpiece from an oblique direction to grow a microcrack in a direction along the surface of the workpiece; and causing the particles to collide with the microcrack of the heat-affected layer to remove the heat-affected layer using the microcrack as a starting point. 2. The surface treatment method according to claim 1 , wherein the step of causing collision includes repeatedly causing the particles to collide with the microcrack to gradually remove the heat-affected layer while the microcrack is connected to other cracks. 3. The surface treatment method according to claim 1 , wherein the step of irradiation includes generating a pinhole on a surface of the heat-affected layer due to an inclusion contained in the workpiece, and the step of causing collision includes causing the particles to collide with the pinhole to remove the heat-affected layer using the pinhole as a starting point. 4. The surface treatment method according to claim 3 , wherein the step of causing collision includes causing the particles to collide with a surface of the workpiece from an oblique direction to scrape off a surface layer of the heat-affected layer while the particles are caught inside the pinhole. 5. The surface treatment method according to claim 4 , wherein the step of causing collision includes repeatedly causing the particles to collide with the pinhole to gradually remove the heat-affected layer. 6. The surface treatment method according to claim 1 , wherein the step of causing collision includes removing the heat-affected layer by a thickness of 1 μm or more and 10 μm or less. 7. The surface treatment method according to claim 2 , wherein the step of causing collision includes removing the heat-affected layer by a thickness of 1 μm or more and 10 μm or less. 8. The surface treatment method according to claim 3 , wherein the step of causing collision includes removing the heat-affected layer by a thickness of 1 μm or more and 10 μm or less. 9. The surface treatment method according to claim 4 , wherein the step of causing collision includes removing the heat-affected layer by a thickness of 1 μm or more and 10 μm or less. 10. The surface treatment method according to claim 5 , wherein the step of causing collision includes removing the heat-affected layer by a thickness of 1 μm or more and 10 μm or less. 11. The surface treatment method according to claim 1 , wherein the step of causing collision includes adjusting a surface roughness Ra of the workpiece to a range of 1.5 μm or less. 12. The surface treatment method according to claim 2 , wherein the step of causing collision includes adjusting a surface roughness Ra of the workpiece to a range of 1.5 μm or less. 13. The surface treatment method according to claim 3 , wherein the step of causing collision includes adjusting a surface roughness Ra of the workpiece to a range of 1.5 μm or less. 14. The surface treatment method according to claim 1 , wherein the step of causing collision includes adjusting a surface roughness Ra of the workpiece to a range of 1.0 μm or less.
Assignees
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Classifications
for surface treatment · CPC title
by shock processing · CPC title
Descaling; Removing coating films · CPC title
comprising mirrors · CPC title
comprising lenses · CPC title
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Frequently asked questions
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- What does patent US12434349B2 cover?
- A surface treatment method includes a step of irradiating a workpiece with a pulsed laser beam through a transparent liquid and a step of causing particles to collide with a heat-affected layer developed on a surface layer portion of the workpiece in the step of irradiating. The particles each has a core made of an elastic body and abrasive grains provided on a surface of the core.
- Who is the assignee on this patent?
- Sintokogio Ltd
- What technology area does this patent fall under?
- Primary CPC classification B24C1/003. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 07 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).