US4625093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stock removal by laser cutting
Assignee: Massachusetts Institute of Technology
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Filing: 1986-01-24
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Granted: 1986-11-25
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Expires: 2006-01-24
Abstract
Abstract Method of removing stock from difficult to machine workpieces comprising directing a first laser beam (LB 1 ) at a workpiece along a first axis to produce a first kerf. A second laser beam (LB 2 ) is directed at the workpiece along a second axis which intersects the first axis to produce a second kerf. Relative motion is effected between the workpiece and the laser beams whereby the intersecting kerfs produce a separate solid removable portion (14) from the workpiece.
Inventors
- 👤 George M. Chryssolouris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/22; B28D1/221; B23; B23K; B23K26/00; B23K26/36; B23K26/361
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
97 words
A method of removing stock from difficult to machine workpieces comprising: directing a first laser beam at a first location on a workpiece and along a first axis to produce a first kerf, directing a second laser beam at a second location on the workpiece which is spaced from the first location on the workpiece and along a second axis intersecting the first axis to produce a second kerf intersecting the first kerf, and effecting relative motion between the workpiece and the laser beams whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece.
Claim 2
Independent Claim
97 words
A method of removing stock from difficult to machine workpieces comprising: directing a first laser beam at a first location on a workpiece and along a first axis to produce a first kerf, directing a second laser beam at a second location on the workpiece which is spaced from the first location on the workpiece and along a second axis intersecting the first axis to produce a second kerf intersecting the first kerf, and effecting relative motion between the workpiece and the laser beams whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece.
Claim 3
Independent Claim
69 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to produce a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
Claim 4
Independent Claim
69 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to produce a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
Claim 5
Independent Claim
128 words
A method of removing stock from difficult to machine workpieces comprising: directing a first laser beam at a first location on a workpiece and along a first axis to produce a first kerf, directing a second laser beam at a second location on the workpiece which is spaced from the first location on the workpiece and along a second axis intersecting the first axis to produce a second kerf intersecting the first kerf, effecting relative linear motion between the workpiece and the laser beams along a third axis, for a distance equal to the length of the workpiece, measured along the third axis to extend the intersecting kerfs along the third axis to produce a separate solid removable portion form the workpiece having at least one planar surface.
Claim 6
Independent Claim
128 words
A method of removing stock from difficult to machine workpieces comprising: directing a first laser beam at a first location on a workpiece and along a first axis to produce a first kerf, directing a second laser beam at a second location on the workpiece which is spaced from the first location on the workpiece and along a second axis intersecting the first axis to produce a second kerf intersecting the first kerf, effecting relative linear motion between the workpiece and the laser beams along a third axis, for a distance equal to the length of the workpiece, measured along the third axis to extend the intersecting kerfs along the third axis to produce a separate solid removable portion form the workpiece having at least one planar surface.
Claim 7
Dependent Claim
14 words
The method of claim 2 wherein the directing of the laser beams occur simultaneously.
Claim 8
Dependent Claim
22 words
The method of claim 2 wherein the beam directing steps are repeated to produce a plurality of removable portions from the workpiece.
Claim 9
Dependent Claim
31 words
The method of claim 2 wherein the first and the second laser beams are produced from a single laser beam source by splitting the single source beam into two component parts.
Claim 10
Dependent Claim
32 words
The method of claim 2 where the second laser beam is directed at the workpiece at an acute angle whereby the removable portion of the workpiece has at least one conical surface.
Claim 11
Dependent Claim
61 words
The method of claim 2 where the second laser beam is directed at the workpiece at an acute angle and, wherein relative continuous motion is effected between the second laser beam and the workpiece in a direction parallel to the axis of rotation of the workpiece, whereby the shape of the separate, solid removable portion of the workpiece is a helix.
Claim 12
Dependent Claim
95 words
Method of claim 3 wherein the movement along the third axis is begun and ended at points spaced from opposite ends of the workpiece measured along the third axis and, wherein relative motion is effected between one laser beam and the workpiece along one of the first or the second axes to produce a third kerf intersecting the first and the second kerfs to produce a separate solid removable portion of the workpiece having a linear dimention along the third axis equal to the distance between the points spaced from the ends of the workpiece.
Claim 13
Dependent Claim
14 words
The method of claim 1 wherein the directing of the laser beams occur simultaneously.
Claim 14
Dependent Claim
14 words
The method of claim 3 wherein the directing of the laser beams occur simultaneously.
Claim 15
Dependent Claim
22 words
The method of claim 1 wherein the beam directing steps are repeated to produce a plurality of removable portions from the workpiece.
Claim 16
Dependent Claim
22 words
The method of claim 3 wherein the beam directing steps are repeated to produce a plurality of removable portions from the workpiece.
Claim 17
Dependent Claim
31 words
The method of claim 1 wherein the first and the second laser beams are produced from a single laser beam source by splitting the single source beam into two component parts.
Claim 18
Dependent Claim
31 words
The method of claim 3 wherein the first and the second laser beams are produced from a single laser beam source by splitting the single source beam into two component parts.
Claim 19
Independent Claim
70 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to produce a trepanning kerf, simultaneously directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
Claim 20
Independent Claim
70 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to produce a trepanning kerf, simultaneously directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
Claim 21
Independent Claim
85 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to product a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface, and repeating the beam directing steps to produce a plurality of removable portions from the workpiece.
Claim 22
Independent Claim
85 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to product a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface, and repeating the beam directing steps to produce a plurality of removable portions from the workpiece.
Claim 23
Independent Claim
92 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to product a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, producing the first and second laser beams from a single laser beam source by splitting the single source beam into two component parts, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
Claim 24
Independent Claim
92 words
A method of removing stock from difficult to machine workpieces comprising: rotating a workpiece, directing a first laser beam at the workpiece parallel to its axis of rotation to product a trepanning kerf, directing a second laser beam at the workpiece to produce a transverse kerf intersecting the trepanning kerf, producing the first and second laser beams from a single laser beam source by splitting the single source beam into two component parts, whereby the intersecting kerfs produce a separate, solid removable portion from the workpiece having at least one cylindrical surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |