JPS5945475B2 - Laser processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser processing device for cutting and perforating a composite material using a laser beam.

When cutting, drilling, or other laser processing is performed using a laser beam, if melts or products from the workpiece adhere to the laser condensing lens and stain the lens, the laser beam will be impaired.

To prevent this, an inert gas is supplied to the laser beam irradiation nozzle so as to surround the laser processing area, thereby shielding the laser processing area from the outside air and preventing oxidation of the processed area. , Toriba Special Public Service No. 56-3207
It is known from Publication No. 7. Further, as a laser welding machine, a system in which an inert gas is supplied to the welding area to prevent oxidation and to cool the welding area is known, for example, from Japanese Utility Model Application Publication No. 57-19090. Furthermore, if a device for cleaning the molten material adhering to the back side of the workpiece is developed, it is possible to develop
It is known from, for example, Japanese Patent No.-44498. However, the above-mentioned traditional prior art does not solve the problem of drilling or cutting composite materials.

In other words, when cutting or perforating a composite material made of two or more materials with different melting and vaporization temperatures using a laser beam, the processing conditions for the workpiece are generally based on the melting and vaporization temperatures. Since the laser output cutting speed is set to match the high-temperature material, the laser power will be too high for materials with low melting and vaporization temperatures, and the heat-affected zone will be expanded.

When flammable products are generated due to heating by this laser light,
This caused a flame phenomenon and encouraged the expansion of the heat-affected zone in the Kaloe area.
The scattered melt and vaporized products of the workpiece adhere to the laser condensing lens and stain the lens. The present invention was proposed based on the above-mentioned circumstances, and includes blowing out an auxiliary gas and an inert gas from above the object to be carved during cutting or drilling. With inert gas from below the workpiece. Suction and discharge the melt and products. The object of the present invention is to provide a laser processing apparatus that avoids contamination of a condenser lens while minimizing thermal effects due to the fact that the workpiece is made of a composite material.

For this purpose. The present invention is. Place the workpiece between the two on the upper side. A nozzle structure is installed that includes a laser beam and auxiliary gas discharge nozzle and an inert gas jetting part that surrounds the laser processing part of the workpiece. Also on the bottom. The present invention is characterized in that a nozzle structure is installed, which includes an inert gas ejection section surrounding the laser processing section and a discharge means for sucking and discharging the laser cutting product together with the inert gas. below. An embodiment of the present invention will be specifically described with reference to the drawings.

The jig 2 for positioning the workpiece material 1 is. It can be moved vertically and horizontally using the Y-axis moving rail 3 and the X-axis moving rail 4.
It is held on the X-axis moving rail 4 with respect to a carrier for the X-axis moving rail 4 along the Y-axis moving rail 3. The framework 6 that supports the Y-axis moving rail 3 is... It is fixed on a pedestal 5. In the middle of the framework 6 above. A portal-shaped support housing 7 is provided. and. In the center of the support housing 7. Beam bender 9 via bracket 8
is provided, and a telescopic tube v for adjustment in the Z-axis direction is provided there. The telescopic tube q above is. A screw 10 is moved up and down by a servo motor built into the bracket 8. Insert into the center hole of the tip arm 11. The upper nozzle 12 is screwed onto the tip screw. This causes the nozzle 12 to move up and down. Lower nozzle 13
teeth. A servo motor 15 is installed on the mounting base 14. An arm 17 is provided at the tip of a screw 16 extending upward from the drive shaft, and is screwed onto the tip of a telescopic tube 18 inserted into the center hole of the arm 17.

The configuration of the upper nozzle 12 is as follows. As seen in Figures 3, 5, and 6. The laser beam and auxiliary gas discharge nozzle portion 12a and . There is a spout 1 on the bottom side surrounding this.
9a, an inert gas jetting head 19; It consists of a positioning sensor 20.

The spout 19a is. The inert gas that is ejected swirls around the surface of the workpiece and is ejected in a radial direction toward the outside. It is opened. The lower nozzle 13 is. A suction port 23 as a discharge means is provided in the center. An inert gas jetting head 24 is provided surrounding this. Its spout 24
a is. It is provided in the bulge 25 so as to blow out inert gas along the outer ring 24b at the top of the head. It is open in the tangential direction.

Note that the reference numeral 21 in Figure 6 is an auxiliary gas supply pipe. 22 and 27
Inert gas supply pipes 628 and 29 supply cooling water to the cooling jacket 13a provided around the nozzle 13,
The discharge pipe 631 is closed by means of applying negative pressure to the suction port 23.

In addition. As seen in Figures 7 and 8. The lower nozzle 13. It may be configured to include two jet ports 24a and 24c.

Here, the spout 24a is. Inert gas is spouted outward along the outer ring 24b at the top of the head. Moreover, the other spout 24c is. Inert gas is spouted inward where the suction port 23 is located. Each opening is spaced apart from each other via a rectifying plate 25a. In such a configuration.
Place the workpiece material 1 on the jig 2. Vertical and horizontal movement adjustments are made to the rails 3 and 4. Then, by the sensor 20 and the servo machine U (not shown). Controls the distance from the top surface of the workpiece. The upper nozzle 12. Movement is controlled along the laser optical axis. Also. Also regarding the lower nozzle 13. sensor 26
Positioning is performed by the function of a servo mechanism (not shown). However. Inert gas is injected from each outlet 19a, 24a, 24b. around the part to be machined of workpiece material 1.
Surrounded by gas and isolated from the outside air. Under this situation, the laser oscillation device works. A laser beam is irradiated onto the part to be processed through the laser beam condensing lens 30. The material to be processed is melted and vaporized using thermal energy.

Auxiliary gas is then forcibly blown onto the workpiece.
Blows the melt and vaporized products downward. These melts, etc. By the suction force acting on the suction port 23. Inhaled together with inert gas. It can prevent contamination of the working environment. In addition. At a speed that is synchronized with the time it takes for the workpiece to be cut. Continuous cutting can be performed by moving the jig 2.

The movement of the workpiece in the direction of the laser optical axis due to the movement of the jig 2 is detected by a positioning sensor. Provides drive for the servo mechanism. The distance between the nozzle and the upper and lower surfaces of the workpiece is kept constant. As explained above. According to the invention. A composite material consisting of two or more materials. Even when cutting and drilling are performed using laser light. The flame phenomenon can be avoided. The product is drawn to the lower nozzle by suction. Prevents contamination of the working environment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention. Figure 2 is an enlarged exploded perspective view of the main parts. Figure 3 is a partially longitudinal side view. Figure 4a
and b are arrow views 6-5 of A-A and B-B in Fig. 3.
The figure is a partially vertical side view showing another form of the upper nozzle structure. Figure 6 is the same plan view. Figure 7 is a partially longitudinal side view showing another form of the lower nozzle structure. FIG. 8 is a plan view of the same. 1... Material to be processed, 2... Jig. 3.
...Y-axis moving rail, 4...X-axis moving rail. 5... Frame 66... Frame. 7.
·····housing. 8...Bracket. 9
...Beam bender 9...Telescope tube. 10... One screw. 1
1...Arm. 12... Upper GI Rezzle. 12a...Laser light and auxiliary gas discharge nozzle 613...Lower nozzle. 13a...
...jacket. 14...Mounting stand. 15...
····Servomotor. 16... One screw. 17...Arm. 18...Telescopic tube. 19...Head. 19
a...Gushing 0.20...Sensor. 2
1... Auxiliary gas supply pipe. 22...Inert gas supply pipe. 23...Suction port. 24...
・・・Head. 24a・・・Gushing 0.24b
...Outer ring. 24c・・・Gushing 0.25・
...bulge. 25a... Rectifying plate. 26
...Sensor, 27...Inert gas supply pipe. 28, 29... Cooling water supply and discharge pipe. 30・
·····Condenser lens. 31... Negative pressure means.

Claims (1)

[Scope of Claims] 1. A nozzle structure is provided above the workpiece with the workpiece in between, and includes a laser beam and auxiliary gas discharge nozzle and an inert gas ejection part surrounding the laser processing part of the workpiece, and A laser processing apparatus characterized in that a nozzle structure is installed on the lower side, which includes an inert gas ejection part surrounding the laser processing part and a discharge means for sucking and discharging the laser cutting product together with the inert gas. 2. The inert gas ejection part of the upper nozzle structure has an opening so as to surround the laser processing part and eject the inert gas radially inward and outward. A laser processing device according to scope 1. 3. The inert gas ejection part of the lower nozzle structure is provided with openings so as to surround the suction port of the discharge means and rotate and eject the inert gas inward and outward. A laser processing device according to scope 1.