US5012069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control method in a CNC laser machining system
Assignee: Fanuc Corp
•
Filing: 1989-01-18
•
Granted: 1991-04-30
•
Expires: 2009-01-18
Abstract
Abstract A power control method in a CNC (computerized numerical control) laser machining system including a CNC apparatus and a laser machining apparatus. The CNC apparatus (10) lowers a laser output by reducing both a pulse duty ratio and a pulse frequency in accordance with the lowering of a machining velocity when machining a corner portion. According to this method, a machining accuracy in the corner portion is improved, thermally influenced regions on the workpiece are reduced, and a surface roughness of the machined engraved surface is improved.
Inventors
- 👤 Takeji Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:14
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/4163; B; B23; B23K; B23K26/00; B23K26/08; B23K26/083; B23K26/0853; G05B2219/00; G05B2219/30; G05B2219/43; G05B2219/43129; G05B2219/43147; G05B2219/45; G05B2219/45165; G05B2219/49; G05B2219/49164
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A power control method in a (computerized numerical control CNC) laser machining system including a CNC apparatus and a laser machining apparatus for machining a workpiece, said method comprising the step of: lowering a machining velocity, and at the same time, lowering an output power of a laser beam by reducing both a pulse duty ratio and a pulse frequency.
Claim 2
Dependent Claim
60 words
A power control method in a (computerized numerical control CNC) laser machining system including a CNC apparatus and a laser machining apparatus for machining a workpiece, said method comprising the step of: lowering a machining velocity, and at the same time, lowering an output power of a laser beam by reducing both a pulse duty ratio and a pulse frequency.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein said step of lowering an output power comprises the substep of: linearly varying said pulse duty ratio.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein said step of lowering an output power comprises the substep of: non linearly varying said pulse duty ratio.
Claim 5
Dependent Claim
35 words
A method according to claim 1, wherein said step of lowering an output power comprises the substep of: varying said pulse frequency in a stepwise manner in accordance with the lowering of said machining velocity.
Claim 6
Dependent Claim
32 words
A method according to claim 1, wherein said step of lowering an output power comprises the substep of: continuously varying said pulse frequency in accordance with the lowering of said machining velocity.
Claim 7
Dependent Claim
29 words
A method according to claim 1, wherein said step of lowering an output power comprises the substep of: varying said output power within a range of 0 to 100%.
Claim 8
Dependent Claim
40 words
A method of according to claim 1, wherein said CNC apparatus includes servo motors and said method further comprising the step of: computing said machining velocity from a velocity of the servo motors after the motors are accelerated or decelerated.
Claim 9
Dependent Claim
39 words
A method according to claim 1, wherein said CNC apparatus includes a velocity feed back means and said method further comprises the step of: computing said machining velocity from a velocity feedback amount provided by the velocity feedback means.
Claim 10
Dependent Claim
70 words
A power control method in a computerized numerical control (CNC) laser machining system including a CNC apparatus and a laser machining apparatus for performing a minute machining of a workpiece with a laser beam having a power, said method comprising the step of: lowering a machining velocity, and at the same time, lowering the power of said laser beam by reducing both a pulse duty ratio and a pulse frequency.
Claim 11
Dependent Claim
70 words
A power control method in a computerized numerical control (CNC) laser machining system including a CNC apparatus and a laser machining apparatus for performing a minute machining of a workpiece with a laser beam having a power, said method comprising the step of: lowering a machining velocity, and at the same time, lowering the power of said laser beam by reducing both a pulse duty ratio and a pulse frequency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |