CN218225121U

CN218225121U - Air-cooled laser cutting head

Info

Publication number: CN218225121U
Application number: CN202222468407.XU
Authority: CN
Inventors: 王安敏; 廖素英
Original assignee: Beijing Tongfang Huaguang System Technology Co ltd
Current assignee: Beijing Tongfang Huaguang System Technology Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-01-06
Anticipated expiration: 2032-09-19

Abstract

The utility model provides an air-cooled laser cutting head, the laser cutting head includes: the laser interface is arranged on the lens cone and is used for connecting a laser output head; the lens barrel is provided with a fin feature, an optical lens is arranged in the center of the lens barrel, and the divergent laser is collimated and focused; the gas homogenizing disc is assembled on the lens barrel, the outer barrel is installed on the gas homogenizing disc, cooling gas is uniformly distributed among fins on the lens barrel through the gas homogenizing disc, and under the constraint of the outer barrel, the cooling gas is disturbed among the fins and flows out from the lower ends of the fins to dissipate heat of the lens barrel; the connecting piece and the nozzle ensure that the cutting protective gas and the laser beam can be coaxially output and act on the workpiece. The utility model discloses an air-cooled heat radiation structure need not liquid cooling, is applicable to the environment that does not allow or reduce liquid and uses, is particularly useful for in the nuclear energy heat chamber that has the radioactivity.

Description

Air-cooled laser cutting head

Technical Field

The utility model belongs to the technical field of laser cutting, in particular to air-cooled laser cutting head is applicable to the environment work that does not allow or reduce liquid and use, is particularly useful for having radioactive nuclear energy heat indoor.

Background

The laser cutting head is one of the important components of the laser cutting machine, and the quality of the laser cutting head directly influences the performance of the whole system. The tiny focused light beam output by the laser cutting head has high energy density and high light beam quality, the light spot irradiation reaches the vaporization temperature of the material quickly in a very short time on the material, holes are formed by evaporation, slag is continuously blown away by combining with auxiliary gas along with the movement of the light beam, and the continuous holes form narrow cutting seams, so that the material is cut.

In order to obtain a high-energy focused beam, an optical lens arranged in the laser cutting head outputs a laser beam which is diverged in a conical shape after being collimated and focused. In the process of shaping and transmitting the light beam, the optical lens loses absorption energy to cause the temperature to be higher and higher, and when the temperature reaches a certain temperature, the surface coating of the optical lens is damaged or the damage threshold of the optical lens material is reached to damage the optical lens, so that the optical lens needs to dissipate heat to keep the temperature within a certain temperature range. In the prior art, a liquid cooling mode is adopted for heat dissipation of the laser cutting head, namely, a water channel is designed in the structure of the laser cutting head, and cooling liquid is introduced to carry out heat exchange so that the structure is maintained at a proper temperature. However, in some working environments, liquid cooling is not allowed or is used as little as possible, typically, a hot room in the nuclear energy field, because the hot room has radioactivity, the used liquid becomes radioactive waste liquid, the treatment process of the radioactive waste liquid is very complicated, high-level waste liquid needs to be stored for a long time, medium-level waste liquid needs to be solidified and stored or converted into low-level waste liquid, the low-level waste liquid needs to be concentrated and treated by various means such as evaporation, ion exchange, chemical condensation and diaphragm separation, a small amount of concentrated liquid needs to be solidified and stored, the stored radioactive substance is high in landfill and maintenance cost, and potential safety hazards exist, so that the hot room is not allowed to use or use as little liquid as possible.

Disclosure of Invention

For solving the not enough of prior art, the utility model discloses combine prior art, provide an air-cooled laser cutting head, the laser cutting head is forced air cooling heat radiation structure, need not liquid cooling. The cooling gas exchanges heat with the fins on the lens barrel, so that the laser cutting head maintains a proper temperature.

In order to achieve the above object, the technical solution of the present invention is as follows.

The utility model provides an air-cooled laser cutting head, the laser cutting head includes: the laser interface is arranged on the lens cone and is used for connecting a laser output head; the lens barrel is provided with a fin feature, an optical lens is arranged in the center of the lens barrel, and the divergent laser is collimated and focused; the gas homogenizing disc is assembled on the lens barrel, the outer barrel is installed on the gas homogenizing disc, cooling gas is uniformly distributed among fins on the lens barrel through the gas homogenizing disc, and under the constraint of the outer barrel, the cooling gas is disturbed among the fins and flows out from the lower ends of the fins to dissipate heat of the lens barrel; the connecting piece and the nozzle ensure that the cutting protective gas and the laser beam can be coaxially output and act on the workpiece.

Furthermore, a collimating lens, a focusing lens and a protective lens are sequentially arranged in the central cavity of the lens cone, and the optical lens is fixed in the lens cone by a spacing ring and a pressing ring.

Further, a plurality of airflow cavities in the vertical direction are formed after the outer cylinder and the lens barrel fins are assembled; the upper surface of the air homogenizing disc is provided with a plurality of air inlet nozzles, the lower surface of the air homogenizing disc is provided with a porous structure corresponding to the airflow cavities, an air buffer cavity is arranged between the upper surface and the lower surface of the air homogenizing disc, and cooling air is uniformly distributed to the airflow cavities after passing through the buffer cavity and the porous structure, so that the high-efficiency and uniform heat dissipation of the lens barrel is ensured.

Further, the laser interface is matched with a fiber type laser output head, and the laser output head can be QBH, D80 or SMA905; the laser interface is connected with the lens cone through threads, and the size of the output focusing light spot is micro-adjusted by adjusting the screwing depth of the threads.

Furthermore, the connecting piece is designed with a disc structure which is attached to the lens cone fins, so that gas flowing out of the gas flow cavity is sprayed in the circumferential direction, and the laser cutting of a workpiece is not influenced; the connecting piece is further provided with an air inlet nozzle, air enters through the air nozzle, protective gas with certain pressure is ejected from the nozzle, and the protective gas and the laser beam jointly act to implement cutting operation.

The beneficial effects of the utility model.

The utility model discloses an air-cooled laser cutting head has proposed the laser cutting head structure through gas cooling, does not use prior art's liquid cooling mode, does not produce the waste liquid, uses air cycle promptly for the cutting head heat dissipation, has advantages such as compact structure, forced air cooling heat dissipation, supporting annex are few, is particularly useful for the radioactive environment in nuclear field.

Drawings

Fig. 1 is a schematic structural diagram of a front view of the present invention.

Fig. 2 isbase:Sub>A schematic structural view of the sectionbase:Sub>A-base:Sub>A of the present invention.

Fig. 3 is a schematic diagram of the explosion structure of the present invention.

Fig. 4 is a schematic structural view of the lens barrel of the present invention.

Fig. 5 is a schematic structural view of the gas homogenizing disc of the present invention.

Fig. 6 is a schematic view of the airflow direction of the present invention.

Reference numerals shown in the drawings: 1. a laser interface; 2. an air homogenizing disc; 3. a lens barrel; 4. an outer cylinder; 5. a collimating mirror; 6. a space ring; 7. pressing a ring; 8. a focusing mirror; 9. protective glasses; 10. a connecting member; 11. a nozzle; 12. an air tap.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the present invention.

As shown in fig. 1 to 5, an air-cooled laser cutting head includes: the device comprises a laser interface 1, an air homogenizing disc 2, a lens barrel 3, an outer barrel 4, a connecting piece 10 and a nozzle 11, wherein the laser interface 1 is arranged on the lens barrel 3 and is used for connecting a laser output head; the lens barrel 3 has a fin characteristic, an optical lens is arranged in the center of the lens barrel, and divergent laser is collimated and focused; the gas homogenizing disc 2 is assembled on the lens barrel 3, the outer barrel 4 is installed on the gas homogenizing disc 2, cooling gas is uniformly distributed among fins on the lens barrel 3 through the gas homogenizing disc 2, and under the constraint of the outer barrel 4, the cooling gas is disturbed among the fins and flows out from the lower ends of the fins to dissipate heat of the lens barrel 3; the connecting piece 10 and the nozzle 11 ensure that the cutting protection gas and the laser beam can be output coaxially and act on the workpiece.

The technical scheme of the utility model in, 3 central intracavity of lens cone from top to bottom install collimating mirror 5, focusing mirror 8, protective glass 9 in proper order, fix optical lens with spacer ring 6 and clamping ring 7 respectively in the lens cone 3, when laser process optical lens, the heat transfer of production gives lens cone 3.

In the utility model, a plurality of airflow cavities in the vertical direction are formed after the outer cylinder 4 and the lens cone 3 are assembled; three air inlet nozzles 12 are uniformly distributed and installed on the upper surface of the air homogenizing disc 2, the lower surface of the air homogenizing disc is provided with a porous structure corresponding to the airflow cavity, the porous structure is a round hole, a long round hole or a square hole and the like, and an air buffer cavity is arranged between the upper surface and the lower surface of the air homogenizing disc 2 and used for storing cooling air sprayed from the nozzles 12; a sealing groove is designed on the upper surface of the outer cylinder 4, so that cooling gas is prevented from leaking from a matching surface between the outer cylinder 4 and the lens barrel 3, and a buffer cavity has certain pressure; the cooling gas is uniformly distributed to each airflow cavity after passing through the buffer cavity and the porous structure, and exchanges heat with the fins of the lens barrel 3 to ensure that the lens barrel 3 uniformly radiates heat.

In the utility model, the laser interface 1 is matched with the optical fiber type laser output head which can be QBH, D80 or SMA905 and the like, and the laser interface 1 is matched with the QBH laser output head in the embodiment; the laser interface 1 is connected with the lens cone 3 through threads, and the distance between the laser output head and the collimating lens 5 is increased or reduced by adjusting the screwing depth of the threads, namely the defocusing amount of laser is adjusted, so that the size of a focused light spot output by the laser cutting head is micro-adjusted.

In the utility model, the connecting piece 10 is designed with a disc structure to be attached to the fins of the lens cone 3, so that the gas flowing out of the airflow cavity is sprayed in the circumferential direction, and the laser cutting work piece is not affected; the connecting piece 10 is also provided with two air inlet nozzles 12, air enters through the air nozzles 12, protective gas with certain pressure is sprayed out from the front end of the nozzle 11, and the protective gas is matched with laser beams to cut workpieces.

As shown in fig. 6, the gas flow path of the laser cutting head is shown, and the introduced gas is divided into two types: cooling gas and shielding gas. The path of the cooling gas is: the air nozzle 12 arranged on the air homogenizing disc 2 enters the air nozzle, flows through a buffer cavity and a porous structure in the air homogenizing disc 2, passes through the fins on the lens cone 3, and finally flows out from the unsealed space at the lower end of the outer barrel 4 and the lens cone 3 to the circumferential direction. The path of the shielding gas is: the protective gas enters from an air nozzle 12 arranged on the connecting piece 10, is sprayed out from the front end of the nozzle 11 along a conical contraction cavity formed by the connecting piece 10 and the nozzle 11, and has a cooling function besides auxiliary cutting.

The means used in the examples are, unless otherwise specified, those conventional in the art.

The utility model discloses a technical scheme of air-cooled laser cutting head provides the laser cutting head with air-cooled heat radiation structure, need not liquid cooling, has solved the difficult problem that still can carry out laser cutting processing among the operational environment when not allowing to use or use liquid cooling as far as possible. The air-cooled laser cutting head has the advantages of compact structure, air-cooled heat dissipation, few accessories and the like, and is particularly suitable for radioactive environments in the nuclear field.

Claims

1. An air-cooled laser cutting head, comprising: the laser device comprises a laser interface (1), an air homogenizing disc (2), a lens barrel (3), an outer barrel (4), a connecting piece (10) and a nozzle (11), wherein the laser interface (1) is arranged on the lens barrel (3) and is used for connecting a laser output head; the lens barrel (3) is provided with a fin characteristic, an optical lens is arranged at the center of the lens barrel, and divergent laser is collimated and focused; the gas homogenizing disc (2) is assembled on the lens barrel (3), the outer barrel (4) is installed on the gas homogenizing disc (2), cooling gas is uniformly distributed among fins on the lens barrel (3) through the gas homogenizing disc (2), and under the constraint of the outer barrel (4), the cooling gas is disturbed among the fins and flows out from the lower ends of the fins to dissipate heat of the lens barrel (3); the connecting piece (10) and the nozzle (11) ensure that the cutting protective gas and the laser beam can be coaxially output and act on the workpiece.

2. The air-cooled laser cutting head of claim 1, wherein: the collimating lens (5), the focusing lens (8) and the protective lens (9) are sequentially arranged in the central cavity of the lens barrel (3), and the optical lens is fixed in the lens barrel (3) by using a spacing ring (6) and a pressing ring (7).

3. The air-cooled laser cutting head of claim 1, wherein: a plurality of airflow cavities in the vertical direction are formed after the outer cylinder (4) and the fins of the lens barrel (3) are assembled; a plurality of air inlet nozzles (12) are mounted on the upper surface of the air homogenizing disc (2), the lower surface of the air homogenizing disc is designed to be of a porous structure corresponding to the airflow cavities, an air buffer cavity is arranged between the upper surface and the lower surface of the air homogenizing disc (2), cooling air is uniformly distributed to the airflow cavities through the buffer cavity and the porous structure, and the lens cone (3) is guaranteed to be efficient and uniform in heat dissipation.

4. The air-cooled laser cutting head of claim 1, wherein: the laser interface (1) is matched with an optical fiber type laser output head, and the laser output head can be QBH, D80 or SMA905; the laser interface (1) is connected with the lens cone (3) through threads, and the size of an output focusing light spot is micro-adjusted by adjusting the screwing depth of the threads.

5. The air-cooled laser cutting head of claim 1, wherein: the connecting piece (10) is provided with a disc structure which is attached to the fins of the lens barrel (3), so that gas flowing out of the airflow cavity is sprayed in the circumferential direction, and the laser cutting of a workpiece is not influenced; still install air inlet nozzle (12) on connecting piece (10), gas passes through air nozzle (12) get into, follow nozzle (11) department jets out the protective gas who has certain pressure, implements the cutting operation with laser beam combined action.