JPS60141393A - Laser beam machining device - Google Patents

Abstract

PURPOSE:To eliminate the need for a laborious adjusting operation and to permit quick generation of pulse laser light under exact conditions by supplying a pluse signal to a laser generating part and controlling the irradiating energy of the pulse laser light. CONSTITUTION:The information on the assignment of a desired working locus and the information on control of laser generation are inputted respectively to an NC control device 8 by a program forming and inputting device 9. The information on the assignment of the working locus is outputted from the device 8 to a driving part 4 for a working table 2 and the table 2 is moved according to said information on the assignment of the working locus, by which a work 3 is moved and controlled. On the other hand, the information on the control of laser generation is outputted from the device 8 to a CPU10 in synchronization with the information on the assignment of the working locus and is subjected to pulse width conversion. When the pulse signal for driving the laser is inputted, the pulse laser light 7 assigned in each time of on and off by the pulse signal for driving the laser is outputted from a laser transmitter 6 and is focused by an optical head 5. The focused laser light is irradiated onto the work 3. The work 3 is therefore cut and worked along the desired locus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a radar processing apparatus using an NC control device.

Conventionally, in this type of apparatus, a workpiece is set on a horizontally movable processing table such as an XY table, and the workpiece is controlled to move according to instructions from an NC control device while directing Norslede light onto the workpiece. It is known that irradiation is used to perform processing such as cutting or welding along a desired processing trajectory. With such a device, simply by setting the workpiece on the processing table, high-precision processing can be automatically and repeatedly performed, greatly increasing processing efficiency.

By the way, in general, in this type of apparatus, when the processing conditions such as the material and thickness of the workpiece change, it is necessary to change the pulse rate of the /4' Lusslede light accordingly.
In conventional devices, the pulse rate is adjusted by the operator manually operating the operation panel at the start of machining or during machining. For this reason, the adjustment operation is extremely troublesome, and moreover, it is easy to make adjustment errors, resulting in a decrease in processing accuracy.The present invention has been made with attention to the above-mentioned circumstances. The purpose of this system is to make it easier to handle by eliminating the need for troublesome adjustment operations, and to improve processing accuracy by making it possible to change the pulsed laser beam generation conditions accurately and quickly. Our goal is to provide the following.

In order to achieve the above-mentioned object, the present invention provides an NC control section with:
The generation control information of the pulsed laser beam determined according to the machining conditions of the workpiece is determined in advance together with the information that determines the machining trajectory, and the generation control information outputted from the NC control section is converted into pulse width. A signal specifying the on time and off time of the IP pulse laser is created, and this pulse signal is supplied to the laser generator to control the irradiation energy of the pulse laser beam.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of the groove diagram of the laser processing apparatus in this embodiment, and numeral 1 in the figure indicates the apparatus base. A processing table 2 consisting of an XY table is installed on the apparatus base 1, and a workpiece 3 is placed on this processing table 2. The processing table 2 is driven by a step morph of a table driving section 4.

Further, an optical head 5 is disposed above the processing table 2 to face it. This optical helad 5 focuses the pulsed laser beam 7 emitted from the laser oscillator 6 and irradiates it onto the surface of the workpiece 3. 2) is useless.

By the way, this device is equipped with an NC control device 8 for processing control. This -N''C control device 8 stores in its memory the machining program created by the program creation input device 9. It consists of laser generation control information for specifying the on/off times of the pulsed laser beam according to the machining conditions on the machining trajectory of the workpiece 3, the material and thickness of the pick, etc. , N
The C control device 8 supplies the machining trajectory designation information to the table driving unit 4 to control the movement of the machining table 2 according to the machining trajectory, and outputs the radar generation control information to the microprocessor (CPU) 1o. ing.

At this time, the radar generation control information is outputted with information indicating the on time of the ie laser beam as the T function designation value, and information indicating the off time as the S function designation value. C
The PU 10 creates a laser driving pulse signal based on the radar generation control information, and creates this pulse signal as shown in FIG. That is,
CPU10 first reads the T function specified value (T code) and checks whether this specified value is O. If this specified value is not O, then the CPU 10 reads the T function specified value (T code). )
Read this specification (output; check whether it is 0 or not. Then, if it is not Jb constant (tl'1 crab〇), first set the above T function specification value for the time corresponding to A, 1 " 1
``Level] 4) Responsive Shingetsu +M occurs, and then the above S function specification 11'J corresponds to 1'' lI Yoma only ``°0''
``Sends a level control signal f4=.

Then, the Noculus Shinzuki of +I'Q''' is applied as a laser drive pulse signal to the radar 1 oscillation, 'y6, and this causes the i4 laser beam generated by the laser oscillator 6 to be On and off hours?
1ill (1'1il to do.

Note that the output level of this pulsed laser beam is set by the output point 11 according to instructions from the NC control device 8.

With such a configuration, the program creation input device 9
The desired machining trajectory designation information and laser generation control information are respectively input to the N Cfl + lI clause Il device (train 8).In this state, the workpiece 3 is placed on the force table 2.
and operate the start button (not shown). Then, the N City 111 device 8 outputs a force l machining 11uL mark J7 fixed↑I"1 report to the table drive unit 4, and the caroe table 2 starts moving along this machining trajectory designation 1?1. , thereby the workpiece 3 moves ffi
controlled. -N in synchronization with the above machining trajectory specification information
Laser generation control information is output from the CPU 10 from the "Cjal" control device 8, and laser generation control information is output from the CPU 1.
0, the pulse width is converted according to the flowchart shown in FIG. For example, the T4A function designation value and the Sa function designation value in the laser generation control information are each represented by a 3-digit BCD code, and the T function designation value 1 to 999 is represented by the Norse Count number 0.01 to 9. 99 m5ec and the specified sia function value of 1 to 999 to 0-1 to 99.9.
Make it compatible with m5ec. Then, set the T function specification value to 12
5 and the S function specified calm is 55, then CP
From U J O, the on time is 1.25 m5ec and the off time is 5.5 m5ec! 1IIJ pulse number is output. FIG. 3(a) shows the waveform of the laser drive pulse signal.

When the laser drive pulse signal is outputted, the laser oscillator 6 outputs an output signal υon and off times specified by the laser drive pulse signal. P light 7
The power output h, the laser beam 7 is the optical herad 5
The beam is focused and irradiated onto the workpiece 3. Therefore, the workpiece 3 is cut, for example, along a desired sail trace by movement by the processing table 2 and irradiation with the nosol laser beam 7. The irradiation energy of the above-mentioned Gurus laser beam 7 at the time of the ox octopus is determined by the on/off time width determined according to the laser drive Noculus signal and the output level set by the output setting circuit 1. determined by.

By the way, when the thickness of the workpiece 3 is partially different as shown in FIG. 1, radar generation control information determined according to the thickness is input to the NC:tilJ control device 8.

Then, at the four points where the thick part of the workpiece 30 moves to the laser spot position, the NC control device 8 outputs laser generation control information set according to the thick part, and the workpiece 3 The thick part is on the laser generation side rI1111I
Cutting is performed using a somewhat lasso laser beam whose on time is set to be long, for example, as shown in FIG. 3(b) in accordance with I+FA. Therefore, even if the workpiece 3 has a thick part,
definitely cut.

In this way, in this example, the laser generation control information set according to the change in the thickness of the workpiece 3 is input into the NC control device if8, and the laser generation control information is applied to the machining trajectory. Since the on/off time width of the pulsed laser beam is controlled by outputting it from the NC control device 8 in synchronization,
The irradiation energy of the i4 Lusslede light can be automatically varied according to the thickness of the workpiece 3, and as a result, compared to conventional equipment in which the irradiation energy of the Gurss laser beam had to be adjusted manually one by one. , machining efficiency and machining accuracy can be greatly improved. In this case, in this embodiment,
Since the above laser generation control information is output as information specifying the pulse on time and off time by using one function and the Sta function provided in the NC control device 8,
There is no need to change the configuration of the NC control device, and there is an advantage that it can be realized with a simple configuration.

Note that the present invention is not limited to the above embodiments.

For example, the pulse width conversion circuit may be configured by a logic circuit other than a microprocessor. Laser generation control information is one function of the NC control device and S1lffl
It is also possible to output using a function other than ril:. In addition, the type of processing, circuit configuration, etc. can be modified and decorated in various ways without departing from the gist of the present invention.

As described in detail above, the present invention includes presetting in the NC control section information that determines the machining trajectory as well as pulsed laser beam generation control information that is determined according to the machining conditions of the workpiece.
The above generation control information output from the NC control section is converted into pulse width to determine the on time and off time of the pulsed laser.
In this system, a pulsed radar light irradiation energy is controlled by creating a pulse signal and supplying this signal to a laser generating section.

Therefore, according to the present invention, it is possible to simplify the handling by dispersing the troublesome key 2 remote operation, and to improve the processing accuracy by making it possible to make thousands of changes in the generation of laser beams accurately and quickly. (4) A laser processing device can be provided.

[Brief explanation of drawings]

The figures are for explaining a simple example of this Komei, and Fig. 1 is a schematic diagram of a laser processing device, and Fig. 2 is a flowchart explaining the operation of the pulse width conversion circuit of the same device.
FIGS. 3(a) and 3(b) are waveform diagrams each illustrating the on/off time of the /f laser beam. DESCRIPTION OF SYMBOLS 1... Equipment base, 2... Processing table, 3... Workpiece, 4... Table drive part, 5... Optical head, 6... Laser excavator, 7... Pulsed laser beam, 8
...NC control device, 9.. Program creation input device, 10.. Microprocessor, 11.. Output setting circuit. Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (2)

[Claims] (1) A processing table that supports a workpiece in a horizontally movable manner, a laser generating section that is placed opposite to this processing table and irradiates the workpiece with pulsed laser beam, and the processing table that follows a predetermined processing trajectory set in advance. an NC control unit that drives and controls the oscillation control information of the pulsed laser beam that is predetermined according to the machining conditions on the machining trajectory of the workpiece; and oscillation control information output from the NC control unit. This pulse signal is obtained by converting the pulse width to -
What is claimed is: 1. A laser processing apparatus comprising: a pulse width converting section for supplying pulsed laser light to the laser generating section and controlling each on/off time of the pulsed laser beam; and a pulse width converting section. (2) NC? l1lj Please set the ON time of the laser beam to the T function command value, and set the OFF time to the S machine and output the undefined value J-1. II! is characterized in that each command value is subjected to pulse width conversion in a pulse width conversion section.
j' A laser processing apparatus according to claim 1.