Electric heating – Metal heating – By arc
Patent
1988-11-03
1990-02-13
Albritton, C. L.
Electric heating
Metal heating
By arc
21912161, 21912184, B23K 2602
Patent
active
049008935
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a laser oscillation control system, and more particularly to a laser oscilation control system wherein an output of the laser oscillator is controlled by a G-code.
Today, laser machining equipment having a numerical control system is widely used. In such laser machining equipment, an X-Y table is controlled by the numerical control system, a work is set in position on the X-Y table so that the work is subject to machining such as cutting by a laser beam emitted from a stationary laser oscillator. In this type of laser machining equipment, it is a widely practiced system that an output of laser is increased or decreased by a dial on an operation panel or the like mounted on the laser machining equipment at the time of machining.
In such a system, however, the setting of the laser output has to be changed by the dial every time a different kind of workpiece is loaded. It is also troublesome for the operator to be frequently involved in performing a setting.
SUMMARY OF THE INVENTION
It is an object of the present invention for solving the aforesaid problem to provide a laser oscillation control system wherein an output of a laser oscillator is controlled by a G-code.
In order to solve the aforesaid problem, the present invention provides a laser oscillation control system for performing laser machining by controlling an X-Y table with a numerical control system, wherein an output of a laser oscillator is controlled by a G-code of a program of the numerical control system and other addresses.
With the control system, the output of the laser oscillator is controlled with the program. Therefore, the operator is not required to set the output each time a different kind of workpiece is loaded.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a block diagram of a laser oscillation control system according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will hereinafter be specifically described with reference to the drawing.
FIG. 1 is a block diagram of a laser oscillation control system according to an embodiment of the present invention. Denoted by numeral 1 is a command means which can include a program or the like such as a paper tape reader or a cassette tape reader, etc., as an input device.
Denoted by numeral 2 is a numerical control system which reads and interprets the program from the command means 1 and applies the command to other units. The program is commanded in the following form:
______________________________________ G01 X2000 Y3000 F4000
S600 P1000 Q5 CR
______________________________________
G-codes such as "G02" and "G03" for circular cutting can be used. "X2000"
and "Y3000" are respectively incremental command values to represent a
movement of the table, but the command values can also be used for an
absolute command. F represents a moving speed of the table or a machining
speed. "S600" represents an output of a laser beam in which "600" denotes
that the output of the laser beam is 600 W. "P1000" represents frequency
pulse output which is 1000 Hz. "Q5" represents a duty ratio of the pulse,
that is, a percentage of a pulse-on time to one cycle of a pulse, which is
5% in this case.
Denoted by numerals 3 and 4 are servoamplifiers, which respectively receive the commands concerning an X-axis and a Y-axis from the numerical control system 2 to drive servomotors 5 and 6. The servomotors 5 and 6 are driven in response to commands from servoamplifiers 3 and 4 to move an X-Y table (not shown).
Denoted by numeral 7 is a high-frequency power supply, which outputs a high-frequency pulse power of several MHz. In this case, a power S, a pulse frequency P and a duty ratio Q are determined according to commands from the numerical control system 2. Denoted by numeral 8 is a laser tube wherein laser medium gas circulates. Denoted by numerals 9a and 9b are electrodes through which the high-frequency pulse from the high-frequency power supply 7 is supplied to the laser tube 8 whe
REFERENCES:
patent: 3700850 (1972-10-01), Lumley et al.
patent: 4323755 (1982-04-01), Nierenberg
patent: 4689467 (1987-08-01), Inoue
patent: 4734729 (1988-03-01), Hertzet et al.
patent: 4769529 (1988-09-01), Tanimoto et al.
Isohata Shigeru
Nagamine Tsuyoshi
Yamazaki Etsuo
Albritton C. L.
Fanuc Ltd
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