Patent US4945207A successfully refreshed from Google Patents.
US4945207A
Expired / Lapsed
US
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Assist gas control method
Assignee: Fanuc Corp
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Filing: 1988-08-10
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Granted: 1990-07-31
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Expires: 2008-08-10
Abstract
Abstract An assist gas control method is provided for a CNC laser machining device including a combination of a laser beam machine and a numerical control apparatus (CNC). The kind, mixing ratio, pressure, and flow rate of a assist gas are controlled by instructions from a machining program, and a numerical control apparatus (10) controls the kind, mixing ratio, pressure and flow rate of the assist gas by controlling a flow rate control valve (32), a pressure control valve (33), and other components, to perform laser machining. Since the kind, mixing ratio, pressure, and flow rate of the assist gas are controlled by the instructions from the machining program and are controlled automatically, an operator is not required to select, set or adjust the assist gas, whereby the preparation time for machining is shortened and laser machining can be carried out with a satisfactory precision.
Inventors
- 👤 Takeji Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:51
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/14; B23K26/142; B23K26/1462; B23K26/1464; B23K26/1476; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/408; G05B2219/00; G05B2219/30; G05B2219/36; G05B2219/36495; G05B2219/45; G05B2219/45165
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a kind, mixing ratio, pressure, and flow rate of an assist gas via instructions in a machining program; and automatically controlling the kind, mixing ratio, pressure, and flow rate of the assist gas using said numerical control apparatus during laser machining operations.
Claim 2
Dependent Claim
70 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a kind, mixing ratio, pressure, and flow rate of an assist gas via instructions in a machining program; and automatically controlling the kind, mixing ratio, pressure, and flow rate of the assist gas using said numerical control apparatus during laser machining operations.
Claim 3
Dependent Claim
100 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a pressure and flow time of a pre-flow of an assist gas and a pressure and flow time of a post-flow of the assist gas via instructions in a machining program; and automatically controlling the pressure and flow time of the pre-flow of the assist gas before machining and the pressure and flow time of the post-flow of the assist gas after machining using said numerical control apparatus during laser machining operations.
Claim 4
Dependent Claim
100 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a pressure and flow time of a pre-flow of an assist gas and a pressure and flow time of a post-flow of the assist gas via instructions in a machining program; and automatically controlling the pressure and flow time of the pre-flow of the assist gas before machining and the pressure and flow time of the post-flow of the assist gas after machining using said numerical control apparatus during laser machining operations.
Claim 5
Dependent Claim
129 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a kind, mixing ratio, pressure, and flow rate of an assist gas during machining, a pressure and flow time of a pre-flow of the assist gas prior to machining, and a pressure and flow time of a post-flow of the assist gas after machining via instructions in a machining program; and automatically controlling the kind, mixing ratio, pressure and flow rate of the assist gas during machining, the pressure and flow time of the pre-flow of the assist gas, and the pressure and flow time of the post-flow of the assist gas using said numerical control apparatus during laser machining operations.
Claim 6
Dependent Claim
129 words
An assist gas control method for a laser machining device including a combination of a laser beam machine and a numerical control apparatus, comprising the steps of: indicating a kind, mixing ratio, pressure, and flow rate of an assist gas during machining, a pressure and flow time of a pre-flow of the assist gas prior to machining, and a pressure and flow time of a post-flow of the assist gas after machining via instructions in a machining program; and automatically controlling the kind, mixing ratio, pressure and flow rate of the assist gas during machining, the pressure and flow time of the pre-flow of the assist gas, and the pressure and flow time of the post-flow of the assist gas using said numerical control apparatus during laser machining operations.
Claim 7
Dependent Claim
65 words
A numerical control instruction for controlling an assist gas during laser machining, the instruction comprising: a field indicating an assist gas instruction; a field indicating a type and a mixture of the assist gas; and a field indicating a table entry for obtaining pressure, flow rate and time of flow of the assist gas based on characteristics of a workpiece and a type of machining.
Claim 8
Dependent Claim
65 words
A numerical control instruction for controlling an assist gas during laser machining, the instruction comprising: a field indicating an assist gas instruction; a field indicating a type and a mixture of the assist gas; and a field indicating a table entry for obtaining pressure, flow rate and time of flow of the assist gas based on characteristics of a workpiece and a type of machining.
Claim 9
Dependent Claim
31 words
An assist gas control method, comprising the step of numerically controlling one of a kind, a mixing ratio, a pressure and a flow rate of an assist gas during laser machining.
Claim 10
Dependent Claim
31 words
An assist gas control method, comprising the step of numerically controlling one of a kind, a mixing ratio, a pressure and a flow rate of an assist gas during laser machining.
Claim 11
Dependent Claim
31 words
A method as recited in claim 5, further comprising numerically controlling one of a pressure and a flow time of the assist gas prior to laser machining and after laser machining.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |