JP2768230B2 - Laser processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting structure of a laser processing apparatus having an air cooling type cooling means.

[0002]

2. Description of the Related Art A conventional laser processing apparatus and its dust collecting structure are shown in FIG. 4 as a system diagram and FIG. 5 as a structural diagram of a processing section. In the drawing, a laser processing apparatus 1 to which a laser beam is supplied from a laser oscillator 2 is used.
The workpiece 4 is irradiated with the laser beam supplied from the processing head 3 as a focused laser beam by a lens or the like.
Although not shown, the processing head 3 and the work 4 are relatively moved and driven by laser beam irradiation, and laser processing such as cutting and welding is performed. As is well known, laser processing is high-energy-density thermal processing, and dust such as fumes and spatters is generated on the laser-irradiated side of the work 4 during welding and on the irradiated and non-irradiated (penetrating) sides during cutting. . Therefore, a dust suction port 5 is provided in the vicinity of the processing section, and a duct 6 is connected to the dust suction port 5 to suck, exhaust, and collect dust generated in the processing section by the dust collecting device 7. As the dust collecting device 7, there is used a case where only a blower is used, or a device having a filter or the like and having a dust removing and deodorizing ability. That is, since the laser processing object covers a wide range from nonmetal to metal, an appropriate dust collecting means is used according to the case.

On the other hand, as a laser 2 for processing, a YAG laser or a CO ₂ laser is well known as a processing laser.
Taking the case of an O ₂ laser as an example, the oscillation tube and the laser medium gas are cooled with cold water at room temperature or lower in order to efficiently perform laser oscillation. Reference numeral 8 denotes an air-cooling type cooling device, which is not shown in detail but which is usually equipped with a compression refrigeration cycle using a refrigerant such as chlorofluorocarbons. And a step of cooling and liquefying the compressed refrigerant with air in a condenser under high pressure and high temperature. In general, the condenser is a fin tube or a plate fin type heat exchanger, and a structure is such that a refrigerant flows through the tube side and air flows through the fin side, and an air blower is used to pump air.

[0004]

Since the conventional laser beam machine is constructed as described above, the air-cooling type cooling device and the dust collecting device are separately provided, which is not only expensive but also requires a large space. There were problems such as large exhaust air volume and high operating costs.

The present invention has been made to solve the above problems, and has as its object to provide a laser processing apparatus that is inexpensive, saves space, and has low operating costs.

[0006]

A laser processing apparatus according to the present invention focuses a laser beam supplied from a laser oscillator and irradiates the laser beam to the workpiece as a focused laser beam to process the workpiece. In the processing apparatus, air cooling cooling means for cooling the laser oscillator is provided, and a dust suction port for collecting dust generated during processing of the workpiece is provided near the workpiece, and the dust suction port is connected to the dust suction port. The exhaust duct is connected to the air inlet of the air-cooled cooling means, and the air-cooled cooling means has a dust collecting function.

In a laser processing apparatus for processing a workpiece by focusing a laser beam supplied from a laser oscillator and irradiating the workpiece as a focused laser beam,
An evaporator constituting a compression refrigeration cycle, a compressor, and a condenser, provided with air-cooled cooling means for cooling the laser oscillator and dust collection means for collecting dust generated during processing of the workpiece, The dust collecting means comprises at least a dust collecting part for collecting the collected dust and a blower for sucking and exhausting the dust, and the air-cooled cooling means is condensed between the dust collecting part of the dust collecting means and the blower. A vessel is provided.

Further, the laser processing apparatus is a carbon dioxide laser processing apparatus, wherein the dust collecting section of the dust collecting means is an electric dust collector.

[0009]

According to the laser processing apparatus of the present invention, the dust suction port for sucking dust is connected to the air suction port of the air-cooled cooling means via the exhaust duct, so that the air-cooled cooling means can also be used as dust collecting means. Can be.

Further, by incorporating a condenser which is a part of the air-cooling type cooling means between the dust collecting portion of the dust collecting means and the blower, the dust collecting means and the air-cooling type cooling means can be partially integrated. it can.

When a carbon dioxide gas laser is used as a laser processing device, a large amount of dust is generated during processing for high output, so that an electric dust collector is used in the dust collecting section to efficiently treat the dust. Can be.

[0012]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 denotes a laser processing apparatus, 2 denotes a laser oscillator, and 3 denotes a processing head. The processing head 3 focuses a laser beam supplied from the laser oscillator 2 by a lens or the like and irradiates the work as a condensed laser beam to the work. Perform processing. Although not shown, the processing head 3 and the workpiece are relatively moved and driven by the irradiation of the laser beam, and laser processing such as cutting welding is performed. 8 is a laser oscillator 2
1 shows an air-cooled cooling device that cools the water with cold water at normal temperature or lower. The air-cooled cooling device 8 incorporates a blower 9, a compressor, an evaporator, a condenser, a cooling water circulation pump and the like (not shown). Reference numeral 10 denotes an air inlet of the air-cooled cooling device 8. Reference numeral 5 denotes a dust suction port provided in the vicinity of a processing portion of the processing head 3 of the laser processing apparatus 1, and 6 denotes a suction port 5
It is an exhaust duct connected to. The end of the exhaust duct 6 is connected to the air inlet 10 of the air-cooled cooling device 8,
The dust generated by the laser processing is sucked and exhausted by the blower 9 from the air inlet 10 of the air-cooled cooling device 8 via the exhaust duct 6 through the suction port 5. Therefore, there is no need to install a dust collecting device as a separate device by using the air blowing function of the air-cooled cooling device as dust collecting means.

Embodiment 2 FIG. Next, another embodiment of the present invention will be described with reference to FIG. Since the operations of 1 to 6 are the same as those of the first embodiment, the description is omitted. Reference numeral 7 denotes a dust collecting device as dust collecting means, and an exhaust duct 6 is connected to a suction port 11 of the dust collecting device 7. The dust collecting device 7 includes a dust collecting unit 12, which may be a simple wire net or a filter, or a high-grade electric dust collecting means, depending on an object to be collected. 9 is a blower. Reference numeral 8 delineated by a dashed line denotes an air-cooled cooling device for the laser oscillator 2, and a cooling water circulation pump for the oscillator 2 is not shown, but the compression refrigeration cycle is composed of an evaporator 15, a compressor 14, a condenser Vessel 13. The condenser 13 is an air-cooled type, and the dust collecting section 1 of the dust collecting device 7 is provided.
It is configured to be installed between the blower 2 and the blower 9.

Next, the operation will be described. Dust generated in the laser processing apparatus 1 is suctioned and collected in a dust collection unit 12 of the dust collector 7, while an air-cooled condenser 13 cooled by a blower 9 in the dust collector 7 performs a compression refrigeration cycle. The laser oscillator 2 is cooled as an air-cooled cooling device 8 via the cooling device. Therefore, by taking in the condenser 13 inside the dust collector 7, the space can be saved, and the operating cost can be saved.

Embodiment 3 FIG. Generally YA as a processing laser
G lasers and carbon dioxide lasers are the mainstream, but carbon dioxide lasers generate a large amount of dust during processing due to their large output. For example, in the case of a 1 KW-class carbon dioxide laser processing apparatus, the capacity of the air-cooled cooling apparatus is about 10,000 kcal / Hr, and the air-cooled air blowing capacity of the condenser is about 50 m ³ / min. Therefore,
It is necessary to treat a large amount of generated dust in the dust collector 12 of the dust collector 7, and by using an electric dust collector as the dust collector 12, it is possible to efficiently process dust collection. That is, dust is charged and coarsened by electric coagulation due to electric discharge, thereby reducing clogging in the filter and effectively collecting dust. Further, in the case of a general laser beam machine, the amount of dust suction and exhaust air in the processing section is about 10 to 50 m depending on the case.
It is about ³ / min, and the capacity of the air flow for air cooling and the capacity of the exhaust air for dust collection are almost the same. FIG. 3 schematically shows an example of a mechanism of dust collection by electrocoagulation of the electrostatic precipitator. In the drawing, a discharge is generated between the discharge disk 16 and the dust collecting disk 17, the charged dust 18 is charged, the particles are coarsened, the particles are efficiently separated by the rotation of the dust collecting disk 17, and the coarse particles are formed. 1
Sent to the filter as 9.

In the description of the embodiment of the present invention, the dust collecting capacity of the air-cooling type cooling apparatus is described only in the case of the blower 9 in FIG. 1, but it is before the condenser (for example, a fin tube type heat exchanger). Although there may be a dust collecting means such as a filter, the dust collector and the laser processing machine, the laser oscillator, the air-cooled cooling device, the duct and the like are shown in one-to-one correspondence in FIGS. The same effect can be obtained even with a complicated system without being limited to this.

[0017]

As described above, according to the present invention, in a laser processing apparatus having an air-cooled cooling device, the dust suction port in the processing section and the exhaust duct connected to the dust suction port are connected to the air suction port of the air-cooled cooling means. As a result, there is no need to separately install a dust collector, and there is an effect that a low-cost, space-saving, and low-cost laser processing apparatus can be obtained.

In a laser processing apparatus having an air-cooling type cooling means, a dust collecting means for collecting dust in a processing part is provided, and a condenser of the air-cooling type cooling means is provided between the dust collecting part of the dust collecting means and the blower. Because it was configured to incorporate
There is an effect that a laser processing apparatus which is space-saving and has a low operating cost can be obtained.

Further, when the laser oscillator is a carbon dioxide laser oscillator, by using an electric dust collector in the dust collecting portion,
There is an effect that a large amount of dust generated by the high-power laser of the carbon dioxide laser processing apparatus can be efficiently treated.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a laser processing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a system diagram showing a laser processing apparatus according to a second embodiment of the present invention.

FIG. 3 is a schematic view of an electric precipitator according to Embodiment 3 of the present invention.

FIG. 4 is a system diagram of a conventional laser processing apparatus.

FIG. 5 is a structural diagram of a processing section of a conventional laser processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laser processing apparatus 2 Laser oscillator 3 Processing head 4 Work 5 Suction port 6 Exhaust duct 7 Dust collecting device 8 Air cooling type cooling device 9 Blower 10 Air suction port 11 Suction port 12 Dust collecting part 13 Condenser 14 Compressor 15 Evaporator 16 Discharge disk 17 Dust collecting disk 18 Dust supplied to electric precipitator 19 Coarse particles

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsuhiko Kawamura 5-1-1, Yadaminami, Higashi-ku, Nagoya-shi Nagoya Works, Mitsubishi Electric Corporation (72) Inventor Shuichi Sawai 5-1-1, Yadaminami, Higashi-ku, Nagoya No. Mitsubishi Electric Corporation Nagoya Works (56) References JP-A-59-156588 (JP, A) JP-A-62-161492 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB Name) B23K 26/14 H01S 3/041

Claims (3)

(57) [Claims] 1. A laser processing apparatus for condensing a laser beam supplied from a laser oscillator and irradiating the object as a condensed laser beam to process the object, air-cooled cooling for cooling the laser oscillator. Means, a dust suction port for collecting dust generated during processing of the work piece is provided near the work piece, and an exhaust duct connected to the dust suction port is provided as an air suction port of the air-cooled cooling means. Connect to
A laser processing apparatus characterized in that a dust collection function is added to the air-cooled cooling means. 2. A laser processing apparatus for processing a workpiece by focusing a laser beam supplied by a laser oscillator and irradiating the workpiece as a focused laser beam, wherein an evaporator constituting a compression refrigeration cycle is provided. A compressor, and a condenser, provided with air-cooled cooling means for cooling the laser oscillator and dust collection means for collecting dust generated during processing of the workpiece, wherein the dust collection means is at least collected. A dust collecting part for collecting dust and a blower for sucking and discharging the dust, wherein a condenser of the air-cooling type cooling means is disposed between the dust collecting part of the dust collecting means and the blower. Characteristic laser processing equipment. 3. The laser processing apparatus according to claim 2, wherein the laser processing apparatus is a carbon dioxide laser processing apparatus, and the dust collecting unit of the dust collecting means is an electric dust collector.