JPH0243579Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvement of a laser processing machine.

<Conventional technology> Conventionally, in order to engrave the surface of a workpiece using a laser, a mask with narrow grooves along the pattern to be engraved is provided, and the mask is placed on a table that moves in a plane. The method used was to cover the material and irradiate the laser from above.

However, this method has a major drawback in that the cost increases due to the cost of manufacturing the mask when producing in small quantities.

<Problems to be solved by the invention and their means> This invention is a laser processing machine proposed to eliminate the above-mentioned drawbacks.Instead of the conventional mask, the movement of the workpiece is controlled by a mark sensor and a photo copying device. This is an attempt to control and carve.

<Examples> Examples of the present invention will be described below based on the drawings. As shown in Figure 1, the X-axis motor 2 on the base 1
A movable table 3 that moves in the left-right direction by a Y-axis motor 4 is provided on the movable table 3. An arm 6 protruding outward from one side of the table 5 is provided, and this arm 6
Attach the photo copying device 7 and mark sensor 8 to.

The photocopying device 7 irradiates a copying drawing 10 from a copying head 9 as shown in the principle diagram shown in FIG. On the copying drawing 10, a scanning line 11 is drawn in one stroke, repeatedly moving in the left and right directions, gradually moving in the orthogonal direction, scanning the entire drawing, and returning from the end point to the starting point. Then, the reflected light from this scanning line 11 is received by two photocells 12, 12, and if the amounts of both received light are not equal, the steering servo, 12, etc. The motor 13 corrects the trajectory,
Head 9 is moved along scanning line 11. Further, from the photocells 12, 12, a signal corresponding to the direction of the head 9 is sent to the synchro resolver 14, and the synchro resolver 14 decomposes the direction vector 15 of the signal into an X-axis vector 16 and a Y-axis vector 17. (see FIG. 4), and generates an X-axis signal and a Y-axis signal corresponding to both vectors. The X-axis signal controls the X-axis motor 2 of the base 1, and the Y-axis signal controls the Y-axis motor 4 of the moving table 3 to move the table 5 along the scanning line 11.

The mark sensor 8 illuminates the processing drawing 18 with a detection light beam, and detects the dark area on the processing drawing 18, that is, the line drawing 19.
Outputs a signal that turns on at the part and turns off at the other parts.

A laser oscillator 20 and a beam bender 21 that emits the laser are arranged above the table 5.

Next, the operation will be explained. The copying drawing 10 is placed under the photocopying device 7, and the processing drawing 18 is placed under the mark sensor 8.
Place the workpiece A on the table 5 below. In the processing drawing 18, a pattern to be engraved is drawn as a line diagram 19. When started in this state, the photocopying device 7 moves left and right along the scanning line 11, and the mark sensor 8 on the same arm also makes the same movement. The mark sensor 8 is shown in line diagram 1 of the processing drawing 18.
It emits a control signal that turns on at 9 parts and turns off at other parts. The laser oscillator 20 is turned on and off by this signal, and the bender 21 emits a laser beam. The workpiece A is perforated by this laser and engraved according to the processing drawing 18. When the copying head 9 scans the copying drawing 10 once, the engraving is completed and the copying head 9 returns to the starting point.

<Effects of the invention> Since the present invention is constructed as described above, it has the following effects.

(1) A table on which the workpiece is placed, a photocopying device that moves along the copying drawing, and a mark sensor that outputs on/off signals according to the brightness of the processing drawing are integrated, and are controlled by the on/off signal. Since the workpiece is engraved using a laser, the work of creating a mask to control the laser, which is required in conventional equipment, is eliminated.

(2) Since the mark sensor is moved by a photocopying device that moves along the scanning line drawn on the processing drawing, a scanning program is no longer necessary.

(3) Since the mark sensor is scanned and moved by a photo copying device, the processing drawing is not limited to a single stroke and can be drawn freely.

[Brief explanation of the drawing]

Figure 1 is a front view showing the laser processing machine of the present invention;
FIG. 2 is a plan view showing the main parts, FIG. 3 is an explanatory diagram showing the principle of the photocopying device, and FIG. 4 is an explanatory diagram of vector decomposition. 5...Table, 7...Photo copying device, 6...
Arm, 8... Mark sensor, 10... Copy drawing, 18... Machining drawing, 20... Laser oscillator.

Claims (1)

[Scope of utility model registration request] An arm is provided protruding from one side of a table that moves in a plane, and a photocopying device that moves along the drawing and a mark sensor that emits an on/off signal depending on the brightness of the processing drawing are attached to the arm. A laser processing machine that uses this control signal to control a laser oscillator placed above.