CN117182352B - Laser cutting head - Google Patents

Abstract

The application discloses a laser cutting head, which includes a fiber optic connector, a first protection component, an optical module, a second protection component and a nozzle blowing component connected in sequence, wherein the nozzle blowing component includes a first sleeve, a first shell body and nozzle, the first sleeve is provided with a first light blowing channel, the first shell is sleeved on the first sleeve, a first heat dissipation channel is formed between the first shell and the first sleeve, and the first heat dissipation channel is formed between the first shell and the first sleeve. The shell is provided with a cooling air channel, a first inlet, a first outlet and a first air outlet. The first inlet and the first outlet are connected with the first heat dissipation channel, the first air outlet is connected with the cooling air channel; the nozzle is connected with the first heat dissipation channel. The shells are connected, the first light blowing channel is connected with the nozzle, and the first air outlet is located on the side of the first shell close to the nozzle. It overcomes the problem that the existing cutting head only designs a heat dissipation structure on the housing of the optical module and cannot meet the heat dissipation needs. It has the advantages of good heat dissipation effect and good cutting performance, and is suitable for high-power lasers.

Description

laser cutting head

Technical field

The present application belongs to the field of laser processing technology, and particularly relates to a laser cutting head.

Background technique

A laser cutting machine is a laser cutting machine that uses a fiber laser generator as a light source. Fiber laser is a new type of laser that can output a high-energy-density laser beam. The output laser beam can be focused on the surface of the workpiece, causing the area on the workpiece illuminated by the ultra-fine focus spot to instantly melt and vaporize. The spot is moved through a CNC mechanical system. Automatic cutting can be realized based on the irradiation position. The fiber laser cutting machine can perform both plane cutting and bevel cutting, and its edges are neat and smooth, making it suitable for high-precision cutting of metal plates and other cutting processes.

The cutting head is an important component of the fiber laser cutting machine. When used in high-end precision fields, the requirements for cutting sheet seam quality and sheet cutting speed are getting higher and higher. In the related art, heat dissipation treatment is generally only performed on the first housing of the optical module, and the heat dissipation effect is average. As the laser power increases, the temperature of the cutting head becomes higher and higher, and the existing heat dissipation design cannot meet the requirements.

Contents of the invention

Embodiments of the present application provide a laser cutting head and a laser cutting system to solve the problem that the existing cutting head only designs a heat dissipation structure in the optical module and cannot meet the heat dissipation requirements.

In a first aspect, an embodiment of the present application provides a laser cutting head, including a fiber optic connector, a first protection component, an optical module, a second protection component and a nozzle blowing component connected in sequence, wherein the nozzle blowing component includes :

The first sleeve is provided with a first light blowing channel;

The first shell is sleeved on the first sleeve. A first heat dissipation channel is formed between the first shell and the first sleeve. The first shell is provided with a cooling air channel. a first inlet, a first outlet and a first air outlet, the first inlet and the first outlet are connected to the first heat dissipation channel, and the first air outlet is connected to the cooling air channel;

The nozzle is connected to the first housing, the first light blowing channel is connected to the nozzle, and the first air outlet is located on the side of the first housing close to the nozzle.

Optionally, the nozzle blowing assembly also includes:

A flow equalizing block is provided in the first sleeve. A second light blowing channel is provided in the flow equalizing block. The second light blowing channel is connected with the first light blowing channel. , a plurality of second air passages are formed between the outer wall of the flow equalizing block and the inner wall of the first sleeve, the second air passages extend along the axial direction of the first sleeve, and a plurality of second air passages Channels are arranged at intervals along the circumference of the flow equalizing block, at least one first air channel is provided on the first sleeve, the air inlet of the first air channel faces the second protection component, and the second The air outlet of the air channel faces the second protection component, the air outlet of the first air channel is connected with the second air channel, and the air outlet of the second air channel is connected with the second light blowing channel. Connected.

Optionally, the outer surface of the current equalizing block is provided with a plurality of first grooves and second grooves, the first grooves extend along the axial direction of the current equalizing block, and the second grooves extend along the axial direction of the current equalizing block. The circumferential distribution of the flow equalizing block, the second groove is provided on the side of the flow equalizing block away from the second protection component, the first groove is connected with the second groove, so The first air channel is connected to the second groove, the flow equalizing block is sealingly connected to the first sleeve, and the inner wall of the first sleeve blocks the first groove and the second groove. The opening of the slot forms the second air passage.

Optionally, the nozzle blowing assembly also includes:

The blowing cover is arranged in the first sleeve and is located on the side of the flow equalizing block close to the second protection component. The blowing cover is provided with a third side on the side away from the flow equalizing block. A communication groove, the first communication groove is connected with the air inlets of the plurality of first air passages.

Optionally, the outer surface of the first sleeve has helically arranged fins, and the fins are sealingly connected to the first housing to form the first heat dissipation channel.

Optionally, the first housing includes:

A cone is sleeved on the first sleeve, and the first heat dissipation channel is formed between the cone and the first sleeve;

A ceramic ring is provided on the side of the cone away from the second protection component. The ceramic ring is connected to the nozzle. The cooling air passage is disposed through the cone and the ceramic ring. The first air outlet is provided on the side of the ceramic ring close to the nozzle.

Optionally, the first housing further includes a first adapter block disposed between the cone and the ceramic ring, the first adapter block connecting the cone and the ceramic ring, The cooling air passage is disposed through the cone, the adapter block and the ceramic ring.

Optionally, the first protection component includes a first mounting base, a first protective mirror and an aperture, the first mounting base is connected to the optical fiber connector, the first protective mirror and the aperture are installed on In the first mounting base, the first protective mirror is closer to the optical fiber connector than the aperture.

Optionally, the aperture includes a first light channel, the inner wall of the first light channel is provided with a light blocking surface, the light blocking surface is close to the first protective mirror, and the light blocking surface is provided with Black high temperature resistant coating layer, the black high temperature resistant coating layer is subjected to burr treatment.

Optionally, the aperture is connected to the first mounting base to form a second heat dissipation channel, the first mounting base is provided with a second inlet and a second outlet, the second inlet and the second outlet are are respectively connected with the second heat dissipation channels.

Optionally, the optical module includes:

a second housing, the second housing connecting the first protection component and the second protection component;

A collimation component installed in the second housing;

A focusing component is installed in the second housing, and the collimating component is closer to the first protection component than the focusing component.

Optionally, the alignment components include:

Collimating lens;

A collimating lens holder, the collimating lens is installed in the collimating lens holder;

A sliding mechanism, which includes a slide rail and a slide block, and the collimating lens holder is fixedly connected to the slide block;

A driving mechanism is connected to the slider, and is used to drive the slider to drive the collimating lens holder closer to or away from the first protection component.

Optionally, the alignment assembly further includes a fixed bracket, the fixed bracket is on the second housing, and the driving mechanism is installed on the fixed bracket.

Optionally, the driving mechanism includes a voice coil motor, and the voice coil motor is connected to the slider.

Optionally, the driving mechanism further includes a magnetic scale and an inductive member, the inductive member is signal-connected to the voice coil motor, the inductive member is arranged opposite to the magnetic scale, the inductive member is fixedly arranged, and The magnetic ruler is connected to the collimating lens base.

Optionally, the sliding mechanism further includes two limiting pieces and a limiting fitting piece. The limiting fitting piece is provided on the slider. The two limiting pieces are spaced apart. The fitting piece is located between the two limiting pieces, and the limiting fitting piece moves between the two limiting pieces along with the slider.

Optionally, a third heat dissipation channel, a third inlet and a third outlet are provided in the collimating lens base, and the third inlet and the third outlet are connected to the third heat dissipation channel.

Optionally, a fourth heat dissipation channel is provided in the second housing, a fourth inlet and a second outlet are provided on the first protection component, and the fourth heat dissipation channel is connected with the fourth inlet and the third outlet. The two exits are connected.

Optionally, the second protection component includes: a lower mounting base, an upper mounting base, a second protective mirror, a second mirror base and a seal. The lower mounting base is docked with the upper mounting base. The mirror is installed on the second mirror base, the second mirror base is fixed between the lower mounting base and the upper mounting base, and the sealing member is located between the second protective mirror and the lower mounting base. The sealing member sealingly connects the second protective mirror and the lower mounting base.

Optionally, the seal is a pan-sealed seal, which is located in the second lens holder. One side of the pan-sealed seal is attached to the second protective mirror, and the other side is in contact with the second protective mirror. Fit the top of the mount as described below.

Optionally, the second protection component further includes a second adapter block, which is disposed on a side of the upper mounting base away from the lower mounting base. The second adapter block is connected to the optical module. A fifth heat dissipation channel is provided in the second transfer block.

Optionally, the lower mounting base is provided with a first air inlet and a second air inlet, the first air inlet is connected to the first light blowing channel, and the second air inlet is connected to the Cooling airway connection.

The laser cutting head provided by the embodiment of the present application includes an optical fiber connector, a first protection component, an optical module, a second protection component and a nozzle blowing component connected in sequence. The first protection component and the second protection component are respectively arranged on the optical module. on both sides of the optical module to prevent dust from entering the inside of the optical module from both sides of the optical module and affecting the performance of the optical lens to ensure the reliability of the laser cutting head. The nozzle blowing assembly includes the first sleeve, the first A first heat dissipation channel is formed between the casing and the nozzle, the first sleeve and the first casing. A cooling air channel is provided in the first casing to simultaneously dissipate heat to the nozzle blowing assembly through liquid cooling and air cooling, and the heat dissipation effect is good. , the laser cutting head is suitable for high-power lasers. It overcomes the problem that the existing cutting head only designs a heat dissipation structure on the housing of the optical module, which cannot meet the heat dissipation needs. It has the advantages of good heat dissipation effect and good cutting performance, and is suitable for high-power lasers. Power laser.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present application more clearly, the following will briefly introduce the drawings needed to describe the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

In order to have a more complete understanding of the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings. Here, the same reference numerals in the following description represent the same parts.

Figure 1 is a perspective view of a laser cutting head provided by an embodiment of the present application.

Figure 2 is a side view of the first protection component provided by the embodiment of the present application.

Figure 3 is a cross-sectional view along line A-A in Figure 2 .

FIG. 4 is a schematic structural diagram of an aperture provided by an embodiment of the present application.

Figure 5 is another side view of the first protection component provided by the embodiment of the present application.

Figure 6 is an exploded view of the first protection component provided by the embodiment of the present application.

Figure 7 is a side view of an optical module provided by an embodiment of the present application.

Figure 8 is a cross-sectional view along line B-B in Figure 7 .

Figure 9 is a perspective view of a form of a collimation assembly provided by an embodiment of the present application.

Figure 10 is a side view of Figure 9.

Figure 11 is a cross-sectional view along line C-C in Figure 10 .

Figure 12 is a perspective view of yet another form of a collimation assembly provided by an embodiment of the present application.

Figure 13 is an exploded view of Figure 12.

Figure 14 is another side view of the optical module provided by the embodiment of the present application.

Figure 15 is a D-D cross-sectional view in Figure 14.

Fig. 16 is a cross-sectional view along E-E in Fig. 14.

Figure 17 is a perspective view of the second protection component provided by the embodiment of the present application.

Figure 18 is a perspective cross-sectional view of the second protection component provided by the embodiment of the present application.

Figure 19 is a perspective view of the nozzle blowing assembly provided by the embodiment of the present application.

Figure 20 is a perspective cross-sectional view of the nozzle blowing assembly provided by the embodiment of the present application.

Figure 21 is an exploded view of the nozzle blowing assembly provided by the embodiment of the present application.

Figure 22 is a cross-sectional view of the first sleeve in the nozzle blowing assembly provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of this application.

Embodiments of the present application provide a laser cutting head for use in high-power fiber lasers, such as kilowatt-level high-power fiber lasers, to solve the problem that existing cutting heads only design heat dissipation structures in optical modules and cannot meet heat dissipation requirements. The following will be described with reference to the accompanying drawings.

Referring to FIG. 1 , the laser cutting head includes an optical fiber connector 100 , a first protection component 200 , an optical module 300 , a second protection component 400 and a nozzle blowing component 500 that are connected in sequence.

In the embodiment of the present application, the optical fiber connector 100 can be a QB connector, a QBH connector, or a QC connector, and is used to connect to the output head of the fiber laser. The selection of the fiber connector 100 is adapted to the output head of the fiber laser, so as to connect the optical fiber to the output head of the fiber laser. The laser beam output from the laser is guided into the laser cutting head.

In the embodiment of the present application, as shown in Figures 2 and 3, the first protection component 200 at least includes a first mounting base 210 and a first protective mirror 220. The first protective mirror 220 is detachably mounted on the first mounting base 210. It is convenient to replace the first protective mirror 220, prevent dust from entering the optical module 300 from the optical fiber connector 100 side, protect the optical module 300, and improve the reliability of the optical module 300.

In the embodiment of the present application, as shown in Figures 7 and 8, the optical module 300 at least includes a second housing 330, a collimating component 310, and a focusing component 320. The collimating component 310 and the focusing component 320 are both installed in the second housing. In 330, the collimating lens of the collimating component 310 and the focusing lens of the focusing component 320 are coaxially arranged, and the collimating lens is closer to the first protection component 200 than the focusing lens. The laser beam output by the fiber laser is collimated by the collimating component 310. After that, it is focused by the focusing component 320 and ejected from the nozzle blowing component 500 to perform laser cutting.

In the embodiment of the present application, as shown in FIGS. 19 and 20 , the nozzle blowing assembly 500 includes a first sleeve 510 , a first housing 520 and a nozzle 540 . The first sleeve 510 is a hollow structure with openings at both ends. A first light blowing channel 511 is provided in the center of the first sleeve 510. The laser beam after being collimated and focused by the optical module 300 passes through the first blowing channel 511. Ejected from the nozzle 540, the first light blowing channel 511 is also connected to the external air source for transmitting pressurized gas. The pressurized gas blows away the slag formed on the cutting part under the action of the laser, thereby forming a cutting path and completing the process. laser cutting. The first shell 520 is sleeved on the first sleeve 510. A first heat dissipation channel 530 is formed between the first shell 520 and the first sleeve 510. The first heat dissipation channel 530 is connected to an external water cooler. Circulating cooling liquid is introduced into the channel 530. The cooling liquid can be water, oil or a mixture of water and oil. The first housing 520 is also provided with a cooling air channel 521, a first inlet 522, a first outlet 523 and a first air outlet 524. , the first inlet 522 and the first outlet 523 are connected to the first heat dissipation channel 530, the first heat dissipation channel 530 is connected to the external water cooling mechanism through the first inlet 522 and the first outlet 523, and the cooling air channel 521 is connected to the external cooling air source. The first air outlet 524 is connected to the cooling air channel 521. The first air outlet 524 is arranged on the side close to the nozzle 540. The cold air directly acts on the nozzle 540 and dissipates heat to the nozzle 540 through the cold air. The first heat dissipation channel 530 is used to dissipate heat to the nozzle blowing assembly 500 to prevent the temperature of the nozzle blowing assembly 500 from being too high and affecting the surrounding optical modules 300 . The nozzle 540 is connected to the side of the first housing 520 away from the second protection component 400 . The first light blowing channel 511 is connected to the nozzle 540 . The first air outlet 524 is located on the side of the first housing 520 close to the nozzle 540 .

It can be understood that in the embodiment of the present application, the first protection component 200 and the second protection component 400 are respectively provided on the light input side and the light output side of the optical module 300 to block both sides of the optical module 300 and prevent dust from entering the optical module 300 , ensuring the optical reliability of the collimating component 310 and focusing component 320 of the optical module 300, preventing the collimating component 310 and focusing component 320 from being burned due to dust accumulation and heat, and improving the service life of the optical lens. In addition, a first heat dissipation channel 530 is formed between the first sleeve 510 and the first housing 520 of the nozzle air blowing assembly 500 in the embodiment of the present application, and the nozzle air blowing assembly 500 is cooled and dissipated through the first heat dissipation channel 530. The first housing 520 is also provided with a cooling air passage 521 to cool the nozzle 540. If the first heat dissipation passage 530 is not provided, the temperature of the cooling air in the cooling air passage 521 will also be relatively high due to the heat generated by the nozzle blowing assembly 500. The nozzle 540 cannot be cooled and dissipated, and the nozzle 540 is easily burned. Moreover, the nozzle blowing assembly 500 is adjacent to the optical module 300. If the temperature of the nozzle blowing assembly 500 is higher, the temperature will be transmitted to the optical module 300, and the temperature of the optical module 300 will also be higher. , the collimation component 310 and the focusing component 320 are burned out, which affects the service life of the optical module 300. Therefore, the embodiment of the present application improves the heat dissipation effect of the laser cutting head, is more suitable for high-power lasers, and improves the efficiency of the laser cutting head. Reliability, guaranteed cutting effect, suitable for precision instrument processing.

In some embodiments, as shown in Figures 20, 21 and 22, the nozzle blowing assembly 500 also includes a flow equalizing block 560, and the first sleeve 510 is provided with a mounting hole 513 and a first light blowing channel inside. 511. The mounting hole 513 is adapted to the flow equalizing block 560. The mounting hole 513 is located above the first light blowing channel 511. The flow equalizing block 560 is installed in the first sleeve 510. There is a second passage in the flow equalizing block 560. The light blowing channel 561, the first light blowing channel 511 and the second light blowing channel 561 are connected, the first light blowing channel 511 and the second light blowing channel 561 are coaxial with the first sleeve 510 It is set that the second light blowing channel 561 is located above the first light blowing channel 511, and a plurality of second air channels 562 are formed between the outer wall of the flow equalizing block 560 and the inner wall of the first sleeve 510. The plurality of second air channels are 562 are arranged at intervals along the circumferential direction of the flow equalizing block 560. The second air passages 562 extend along the axial direction of the first sleeve 510. The first sleeve 510 is provided with at least one first air passage 550. The first air passage 550 extends along the circumferential direction of the flow equalizing block 560. The first sleeve 510 extends axially, the air inlet of the first air channel 550 faces the second protection assembly 400, the air outlet of the second air channel 562 faces the second protection assembly 400, and the first air channel 550 faces away from the second protection assembly 400. One end of the assembly 400 is connected to an end of the second air channel 562 facing away from the second protection assembly 400. The second air channel 562 is connected to the second light blowing channel 561, and the second light blowing channel 561 is connected to the first light blowing channel 561. The air channels 511 are connected.

It can be understood that the first air channel 550 is connected to the external air source. Along the radial direction of the first sleeve 510, the first air channel 550 is located outside the second air channel 562, and the second air channel 562 is located at the second light-transmitting Outside the blowing channel 561, the gas enters the second air channel 562 from the first air channel 550 and then enters the second light blowing channel 561, and then enters the nozzle 540 from the first light blowing channel 511. The gas undergoes multiple turns. Design, compared with directly entering the first light blowing channel 511 from the second light blowing channel 561, the gas is evenly dispersed, which reduces the internal pressure loss of the second light blowing channel 561 and the first light blowing channel 511. , ensure the air pressure, improve the air blowing effect, and ensure the shape of the cutting path.

Based on the above embodiments, as shown in FIG. 21 , a plurality of second air passages 562 are arranged at equal intervals along the axial direction of the flow equalizing block 560 , and the number of the second air passages 562 is greater than the number of the first air passages 550 , improve the pressure equalization effect. The greater the number of second air passages 562, the better the pressure equalization effect.

Based on the above embodiments, as shown in FIG. 21 , the outer surface of the flow equalizing block 560 is provided with a plurality of first grooves 563 and second grooves 564 , and the first grooves 563 are along the axial direction of the flow equalizing block 560 Extending, the second groove 564 is distributed along the circumference of the flow equalizing block 560. The second groove 564 is provided on the side of the flow equalizing block 560 away from the second protection component 400. The first groove 563 is connected with the second groove 564. , the first groove 563 and the second groove 564 are both semicircular groove structures, the flow equalizing block 560 is sealingly connected to the first sleeve 510, and the inner wall of the first sleeve 510 blocks the first groove 563 and the second groove 563. The opening of the groove 564 forms a second air passage 562, and the first air passage 550 communicates with the second groove 564.

It can be understood that the gas flowing out of the first air channel 550 is buffered by the second groove 564 and then enters the first groove 563, reducing the air pressure loss, so that the air pressure in each first groove 563 is the same, and the pressure equalization effect is good.

As shown in Figure 22, the inner wall of the first sleeve 510 is provided with a third groove 514. The third groove 514 is close to the first light blowing channel 511. The third groove 514 is connected to the outlet of the first air channel 550. The air ports are connected, and the opening of the third groove 514 is opposite to the opening of the second groove 564. The third groove 514 and the second groove 564 form an annular channel to reduce air pressure loss.

In some embodiments, as shown in Figure 20, the nozzle blowing assembly 500 also includes a blowing cover 570. The blowing cover 570 is an annular disk structure, and the blowing cover 570 is disposed in the first housing 520. The blowing cover 570 is connected to the first housing 520 through a pin. The blowing cover 570 is disposed on the side of the first sleeve 510 close to the optical module 300 and between the blowing cover 570 and the first sleeve 510 Connected through a sealing ring, a first communication groove 571 is provided on a side of the blowing cover plate 570 away from the flow equalizing block 560. The first communication groove 571 is arc-shaped. The first communication groove 571 is connected to the plurality of first air passages 550. The air inlets are connected, for example, the air inlets of two first air passages 550 share a first communication groove 571 , or the air inlets of four first air passages 550 share a first communication groove 571 . The air inlet end of the first air channel 550 is gathered through the blowing cover plate 570 to realize simultaneous air intake into the first air channel 550 to ensure the pressure equalization effect.

In some embodiments, as shown in FIGS. 20 and 22 , the outer surface of the first sleeve 510 has helically arranged fins 512 , and the fins 512 are sealingly connected to the first housing 520 , and adjacent fins 512 A first heat dissipation channel 530 is formed between the groove and the inside of the first housing 520. The spiral first heat dissipation channel 530 increases the length of the heat dissipation channel and improves the heat dissipation effect.

In the above embodiment, the surface of the first sleeve 510 has two spirally arranged fins 512. The spiral directions of the two fins 512 are the same. Two spirals are formed between the first sleeve 510 and the first housing 520. shaped first heat dissipation channel 530. The length of the heat dissipation channel is further increased to improve the heat dissipation effect. In addition, even if one of the first heat dissipation channels 530 is blocked, the other one can still circulate, ensuring the reliability of heat dissipation.

In some embodiments, as shown in FIGS. 20 and 21 , the first housing 520 includes a cone 526 and a ceramic ring 527 . The cone 526 is sleeved on the first sleeve 510 , and the cone 526 is connected to the first sleeve 510 . 510 are sealed to form the first heat dissipation channel 530. The cone 526 is provided with a flange connection on the side connected to the second protection component 400. The cone 526 is detachably connected to the second protection component 400 through a pin. The cone 526 The side close to the nozzle 540 is cylindrical. The ceramic ring 527 is connected to the nozzle 540. The cooling air channel 521 is provided in the cone 526 and the ceramic ring 527. A first air outlet is provided on the side of the ceramic ring close to the nozzle 540.

It can be understood that the cooling air channel 521 blows cold air directly to the nozzle 540 through the ceramic ring 527, thereby reducing heat loss and improving the cooling and heat dissipation effect of the nozzle 540.

Based on the above embodiments, as shown in Figures 19, 20 and 21, the first housing 520 also includes a first adapter block 528, which is disposed between the cone 526 and the ceramic ring 527. The block 528 connects the cone 526 and the ceramic ring 527. The ceramic ring 527 is connected to the first adapter block 528 through the connecting thread sleeve 529. The cooling air channel 521 is disposed through the cone 526, the adapter block 528 and the ceramic ring 527. The first housing 520 is assembled in a split structure and can be installed and disassembled for easy maintenance.

The cooling air passage 521 includes a first sub-section, a second sub-section, a third sub-section, and a fourth sub-section. The first sub-section extends along the axis of the cone 526, and the second sub-section is disposed toward the first adapter block 528. On one side of the cone 526, the second sub-section is in the shape of a long groove. One end of the second sub-section is connected to the first sub-section, and the other end is connected to the third sub-section. The third sub-section is arranged in the first transfer block 528. , the third sub-section is bent, and the fourth sub-section is arranged in the ceramic ring 527. The ceramic ring 527 is provided with a first air outlet 524 of an annular groove structure on one side facing the nozzle 540. Through the annular first air outlet 524 Blow air to the nozzle 540, the blowing area is large, which is beneficial to the heat dissipation of the nozzle 540.

In some embodiments, as shown in FIGS. 1 , 2 and 3 , the first protection component 200 includes a first mounting base 210 , a first protective mirror 220 and an aperture 230 . The first mounting base 210 is connected to the optical fiber connector 100 , the first protective mirror 220 and the aperture 230 are installed in the first mounting base 210, and the first protective mirror 220 is closer to the optical fiber connector 100 than the aperture 230.

In the embodiment of the present application, the first protective mirror 220 has a dust-proof function to prevent dust from entering the optical module 300 on the rear side. The aperture 230 is provided in the first mounting base 210 to block light. Through the first mounting base 210 integrates the first protective mirror 220 and the aperture 230 to form the first protective component 200, which facilitates the overall installation and disassembly of the first protective component 200 and improves the maintainability of the module.

In some embodiments, as shown in FIG. 4 , the aperture 230 has a cylindrical structure, and the aperture 230 includes a first light channel 231 . The inner wall of the first light channel 231 is provided with a light blocking surface 232 . The light blocking surface 232 Close to the first protective mirror 220, the light-blocking surface 232 is in the shape of a trumpet. The diameter of one end of the light-blocking surface 232 close to the first protective mirror 220 is larger than the diameter of the other end. The light-blocking surface 232 blocks light and has a large light-blocking area.

In some embodiments, the light-blocking surface 232 is provided with a black high-temperature resistant coating layer. The black high-temperature resistant coating layer can withstand a temperature of 1400° C., which improves the high-temperature resistant performance of the aperture 230 .

In some embodiments, the black high-temperature resistant coating layer is burred, which increases the laser absorption rate of the light blocking surface 232, reduces laser reflection, prevents scattered light caused by laser reflection, and makes the aperture 230 more stable.

In some embodiments, as shown in FIGS. 2 and 3 , the outer surface of the aperture 230 is sealingly connected to the inner surface of the first mounting base 210 , and a second heat dissipation channel is provided between the aperture 230 and the first mounting base 210 . 240. The first mounting base 210 is provided with a second inlet 241 and a second outlet 242, and the second inlet 241 and the second outlet 242 are connected with the second heat dissipation channel 240.

The second heat dissipation channel 240 is used to dissipate heat to the aperture 230 to avoid physical damage to the aperture 230 caused by excessive temperature of the aperture 230. It can also prevent heat from being transferred to the lower optical module 300, protect the optical module 300, and improve the laser cutting head. reliability.

Based on the above embodiments, as shown in FIG. 4 , the outer surface of the aperture 230 is provided with a fourth groove 233 , the aperture 230 is sealingly connected to the first mounting base 210 , and the fourth groove 233 is connected to the first mounting base 210 . The inner wall of 210 surrounds a second heat dissipation channel 240, the fourth groove 233 is a non-closed annular shape, the second inlet 241 is provided at one end of the fourth groove 233, and the second outlet 242 is provided at the other end of the fourth groove 233. , increasing the area of the second heat dissipation channel 240 as much as possible to improve the heat dissipation effect.

On the basis of the above embodiments, as shown in Figures 3 and 6, the first protection assembly 200 also includes a first mirror holder 250. The first protective mirror 220 is installed on the first mirror holder 250. The first mirror holder 250 is drawer-drawn It is installed on the first mounting base 210, which facilitates the replacement and disassembly of the first mirror base 250.

In some embodiments, as shown in FIGS. 17 and 18 , the second protection assembly 400 includes a lower mounting base 410 , an upper mounting base 420 , a second protective mirror 430 , a second mirror base 440 and a seal 450 . The lower mounting base 410 The second protective mirror 430 is installed on the second mirror base 440 and the second mirror base 440 is fixed on the lower mounting base 410 and the upper mounting base 420 The sealing member 450 is located between the second protective mirror 430 and the lower mounting base 410 , and the sealing member 450 sealingly connects the second protective mirror 430 and the lower mounting base 410 . The modular second protection component 400 facilitates the installation and disassembly of the second protection component 400 and facilitates operation.

It can be understood that the air outlet of the second air channel 562 faces the second protection component 400, and the gas discharged from the second air channel 562 is sprayed towards the second protection component 400. The second protection component 400 is designed to have a sealed structure, and the gas hits the second protection component 400. The second protective mirror 430 turns rearward and flows into the second light blowing channel 561 below to achieve pressure equalization.

Based on the above embodiments, as shown in FIG. 18 , the seal 450 is a pan-sealed seal. The pan-sealed seal is located in the second mirror holder 440 . One side of the pan-sealed seal is attached to the second protective mirror 430 , and the other side of the pan-sealed seal is in contact with the second protective mirror 430 . The sides fit with the top of the lower mounting base 410 .

It can be understood that the air outlet of the second air channel 562 blows air to the second protection component 400. After the pan-plug seal is inflated, the two sides of the pan-plug seal fit more closely with the second protective mirror 430 and the lower mounting base 410. The greater the air pressure, the better the sealing effect.

Based on the above embodiments, as shown in FIG. 18 , the upper mounting base 420 is provided with a monitoring installation plate 460 , and the monitoring installation plate 460 is provided with a temperature sensor, an air pressure sensor and a photosensitive sensor.

Based on the above embodiments, as shown in FIGS. 1 and 17 , the lower mounting base 410 is provided with a first air inlet 411 and a second air inlet 412 , and the lower mounting base 410 faces the side of the blowing cover 570 A second communication groove 413 is provided, the second communication groove 413 corresponds to the first communication groove 571, the first air inlet 411 communicates with the second communication groove 413, the second communication groove 413 communicates with the first communication groove 571, thereby achieving The first air inlet 411 is connected to the first light blowing channel 511 , and the second air inlet 412 is connected to the cooling air channel 521 .

As a variant, the first air inlet 411 and the second air inlet 412 can also be directly provided on the nozzle blowing assembly 500 to achieve air intake.

In some embodiments, as shown in FIG. 18 , the second protection component 400 further includes a second adapter block 470 , which is disposed on the side of the upper mounting base 420 away from the lower mounting base 410 . The second adapter block 470 is connected to the optical module. 300 and lower mount 410. A plurality of second adapter blocks 470 may be provided according to the focusing distance of the focusing assembly 320 . The second adapter block 470 is provided with a fifth heat dissipation channel 480. The fifth heat dissipation channel 480 cools and dissipates heat for the focusing component 320, thereby improving the heat dissipation effect of the optical module 300.

Based on the above embodiments, as shown in FIGS. 9 to 13 , the collimation assembly 310 includes a collimating lens 311 , a collimating lens base 312 , a sliding mechanism 313 and a driving mechanism 314 . The collimating mirror 311 is installed in the collimating mirror base 312. The sliding mechanism 313 can use a standard guide rail module to reduce the installation difficulty, improve structural stability, accuracy, load-bearing capacity, and improve structural maintainability, interchangeability, and stability. The sliding mechanism 313 includes a guide rail 3131 and a sliding block 3132. The collimating mirror base 312 is fixedly connected to the sliding block 3132. The driving mechanism 314 is connected to the sliding block 3132. The driving mechanism 314 drives the sliding block 3132 to move, and the sliding block 3132 drives the collimating mirror base. 312 approaches or moves away from the first protection component 200 to realize automatic adjustment of the collimating lens 311. The automatic adjustment has high precision and the adjustment operation is simple.

The collimation component 310 adopts a modular design and is a separate functional module in the entire cutting head. The collimation component 310 is easy to disassemble, reliable, and maintainable. The module and the cutting head housing are designed with a quick-release structure, which is convenient and accurate. Straight lens maintenance and replacement.

On the basis of the above embodiment, as shown in Figure 9, the sliding mechanism 313 also includes two limiting parts 3133 and a limiting fitting part 3134. The limiting part 3133 is a blocking post, and the limiting fitting part 3134 is a baffle. The limiting fitting part 3134 is provided on the slider 3132, the two limiting parts 3133 are spaced apart, and the limiting fitting part 3134 is located between the two limiting parts 3133. When the driving mechanism 314 drives the slider 3132 to move, it drives the limiting fitting part 3134 to move until the limiting fitting part 3134 contacts the limiting part 3133 and the collimating mirror 311 reaches the extreme position.

In some embodiments, as shown in FIGS. 9 and 13 , the collimation assembly 310 further includes a fixing bracket 315 , the fixing bracket 315 is provided on the second housing 330 , and the driving mechanism 314 is installed on the fixing bracket 315 .

In some embodiments, as shown in Figures 9 and 12, the driving mechanism 314 includes a voice coil motor 3141. The voice coil motor 3141 is connected to the sliding mechanism 313. The voice coil motor 3141 is used to drive the collimating lens base 312 closer to or away from the First protection component 200. The voice coil motor has large torque, strong load-bearing capacity, fast acceleration, the collimating lens 311 can quickly complete the adjustment action, fast zoom time, small size, and compact structure.

In some embodiments, as shown in FIG. 12 , the driving mechanism 314 also includes a magnetic scale 3142 and a sensing component 3143 . The sensing component 3143 is signal-connected to the voice coil motor 3141 . The sensing component 3143 is opposite to the magnetic scale 3142 . The sensing component 3143 is fixed. Set up, the magnetic ruler 3142 is connected to the collimating lens holder 312, and the sensing element 3143 and the magnetic ruler 3142 move relatively.

It can be understood that through the cooperation of the magnetic ruler 3142 and the sensing element 3143, the moving distance of the collimating mirror 311 can be accurately calculated, and the precise adjustment of the collimating mirror 311 can be achieved.

As shown in Figure 12, the fixed bracket 315 includes a motor fixing plate 3151 and a coil fixing plate 3152. The motor fixing plate 3151 is fixedly connected to the second housing 330. The voice coil motor 3141 is fixed on one side of the motor fixing plate 3151, and the coil fixing plate 3152 It is fixed on the coil end of the voice coil motor 3141, the coil fixing plate 3152 is fixedly connected to the slider 3132, and the limiting member 3133 is provided on the motor fixing plate 3151. There is a quick-release modular structure between the collimating component 310 and the second housing 330 to facilitate the maintenance of the collimating lens 311. When the collimating lens 311 is damaged, just dismantle the collimating component 310 as a whole to improve the efficiency of the system. The product is maintainable. At the same time, the collimator mirror 311 and the collimator lens base 312 have a standardized module structure. When repairing the collimator mirror 311, you only need to replace the standardized module, and the installation and maintenance are simple.

In some embodiments, as shown in FIGS. 10 and 11 , the collimating lens base 312 is provided with a third heat dissipation channel 3121 , a third inlet 3122 and a third outlet 3123 , and the third inlet 3122 and the third outlet 3123 are connected with the third The three heat dissipation channels are 3121 connected.

It can be understood that in the embodiment of the present application, by separately setting the third heat dissipation channel 3121 in the collimator lens holder 312, the heat of the collimator lens 311 can be directly dissipated, preventing the collimator lens 311 from being burned, and ensuring that the collimator lens 311 Safe and reliable, it is more suitable for cutting applications of high-power lasers.

In some embodiments, as shown in FIGS. 14 , 15 and 16 , the second housing 330 is provided with a fourth heat dissipation channel 331 , the fifth heat dissipation channel 480 is connected to the fourth heat dissipation channel 331 , and the fourth heat dissipation channel 331 Flows through the side and top surfaces of the second housing 330 .

Referring to Figures 5, 14, 15 and 16, the fourth heat dissipation channel 331 includes a water inlet channel 3311, a water outlet channel 3312 and a fourth inlet 3313. The fourth inlet 3313 is provided on the first mounting base 210, and the water inlet is The channel 3311 is provided on one side of the second housing 330, and the water outlet channel 3312 is provided on the other side of the second housing 330. The two sides are oppositely arranged, and the water inlet channel 3311 and the water outlet channel 3312 are connected with the fifth heat dissipation channel 480. , the water outlet channel 3312 and the second heat dissipation channel 240 share the second outlet 242, realizing the integration of pipelines and reducing openings.

In the above embodiments, each embodiment is described with its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

In the description of this application, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more features.

The laser cutting head provided by the embodiments of the present application has been introduced in detail. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its implementation. Core idea; at the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of this application. In summary, the content of this description should not be understood as a limitation of this application.

Claims (17)

1. The utility model provides a laser cutting head, its characterized in that, including the fiber connector that connects gradually, first protection subassembly, optical module, second protection subassembly and nozzle subassembly of blowing, wherein, the nozzle subassembly of blowing includes:

The first sleeve is provided with a first light-transmitting and air-blowing channel;

the first shell is sleeved on the first sleeve, fins which are spirally arranged are arranged on the outer surface of the first sleeve, the fins are in sealing connection with the first shell to form a first heat dissipation channel, a cooling air channel, a first inlet, a first outlet and a first air outlet are arranged on the first shell, the first inlet and the first outlet are communicated with the first heat dissipation channel, and the first air outlet is communicated with the cooling air channel;

the first light-passing blowing channel is communicated with the nozzle, and the first air outlet is positioned at one side of the first shell close to the nozzle;

the flow equalization block is internally provided with a mounting hole, the mounting hole is matched with the flow equalization block, the flow equalization block is cylindrical, the flow equalization block is arranged in the first sleeve, a second ventilation and air blowing channel is arranged in the flow equalization block and is communicated with the first ventilation and air blowing channel, a plurality of second air channels are formed between the outer wall of the flow equalization block and the inner wall of the first sleeve, the second air channels extend along the axial direction of the first sleeve, a plurality of second air channels are arranged at intervals along the circumferential direction of the flow equalization block, at least one first air channel is arranged on the first sleeve, the air inlet of the first air channel faces the second protection component, the air outlet of the second air channel faces the second protection component, the air outlet of the first air channel is communicated with the second air channel, and the air outlet of the second air channel is communicated with the second ventilation and air blowing channel;

The air blowing cover plate is arranged in the first sleeve and is positioned at one side of the flow equalizing block, which is close to the second protection assembly, and the air blowing cover plate is connected with one end of the first sleeve, which faces the second protection assembly, so as to fix the flow equalizing block in the mounting hole, a first communication groove is formed in one side surface of the air blowing cover plate, which faces away from the flow equalizing block, and the first communication grooves are communicated with air inlets of a plurality of first air channels;

the second protection assembly includes: the air conditioner comprises a lower mounting seat, an upper mounting seat, a second protection mirror, a second mirror seat and a sealing element, wherein the lower mounting seat is in butt joint with the upper mounting seat, the second protection mirror is mounted on the second mirror seat, the second mirror seat is fixed between the lower mounting seat and the upper mounting seat, the sealing element is positioned between the second protection mirror and the lower mounting seat, the sealing element is in sealing connection with the second protection mirror and the lower mounting seat, the lower mounting seat is provided with a first air inlet and a second air inlet, the lower mounting seat faces one side of an air blowing cover plate, the lower mounting seat is in sealing connection with the air blowing cover plate, the second communication groove corresponds to the first communication groove, the first air inlet is communicated with the second communication groove, the second communication groove is communicated with the first communication groove, the first air inlet is communicated with the first communication groove, and the second air inlet is communicated with the cooling air passage.

2. The laser cutting head of claim 1, wherein the outer surface of the flow equalization block is provided with a plurality of first grooves and second grooves, the first grooves extend along the axial direction of the flow equalization block, the second grooves are distributed along the circumferential direction of the flow equalization block, the second grooves are arranged on one side, deviating from the second protection component, of the flow equalization block, the first grooves are communicated with the second grooves, the first air channels are communicated with the second grooves, the flow equalization block is in sealing connection with the first sleeve, and the inner wall of the first sleeve seals the openings of the first grooves and the second grooves to form the second air channels.

3. The laser cutting head of claim 1, wherein the first housing comprises:

the cone is sleeved on the first sleeve, and the first heat dissipation channel is formed between the cone and the first sleeve;

the ceramic ring is arranged on one side, deviating from the second protection component, of the cone, the ceramic ring is connected with the nozzle, the cooling air passage penetrates through the cone and the ceramic ring, and the ceramic ring is close to one side of the nozzle and is provided with the first air outlet.

4. The laser cutting head of claim 3, wherein the first housing further comprises a first adapter block disposed between the cone and the ceramic ring, the first adapter block connecting the cone and the ceramic ring, the cooling air passage being disposed through the cone, the adapter block, and the ceramic ring.

5. The laser cutting head of claim 1, wherein the first protective assembly comprises a first mount, a first protective mirror, and a diaphragm, the first mount being coupled to the fiber optic connector, the first protective mirror and the diaphragm being mounted within the first mount, the first protective mirror being closer to the fiber optic connector than the diaphragm.

6. The laser cutting head of claim 5, wherein the diaphragm comprises a first light-passing channel, wherein a light blocking surface is arranged on the inner wall of the first light-passing channel, the light blocking surface is close to the first protective mirror, a black high-temperature-resistant coating layer is arranged on the light blocking surface, and the black high-temperature-resistant coating layer performs burr treatment.

7. The laser cutting head of claim 6, wherein the diaphragm is connected to the first mount to form a second heat dissipation channel, and the first mount is provided with a second inlet and a second outlet, the second inlet and the second outlet being respectively in communication with the second heat dissipation channel.

8. The laser cutting head of claim 1, wherein the optical module comprises:

the second shell is connected with the first protection component and the second protection component;

a collimation assembly mounted within the second housing;

and the focusing assembly is arranged in the second shell, and the collimating assembly is close to the first protection assembly compared with the focusing assembly.

9. The laser cutting head of claim 8, wherein the collimation assembly comprises:

a collimator lens;

the collimating lens seat is arranged in the collimating lens seat;

the sliding mechanism comprises a sliding rail and a sliding block, and the collimating lens base is fixedly connected with the sliding block;

the driving mechanism is connected with the sliding block and is used for driving the sliding block to drive the collimating mirror base to approach or deviate from the first protection component.

10. The laser cutting head of claim 9, wherein the collimation assembly further comprises a fixed mount on which the drive mechanism is mounted on the fixed mount and the second housing.

11. The laser cutting head of claim 9, wherein the drive mechanism comprises a voice coil motor coupled to the slider.

12. The laser cutting head of claim 11, wherein the driving mechanism further comprises a magnetic scale and a sensing piece, the sensing piece is in signal connection with the voice coil motor, the sensing piece is arranged opposite to the magnetic scale, the sensing piece is fixedly arranged, and the magnetic scale is connected with the collimating lens holder.

13. The laser cutting head of claim 9, wherein the slip mechanism further comprises two stop members and a stop engagement member, the stop engagement member being disposed on the slider, the two stop members being disposed in spaced relation, the stop engagement member being disposed between the two stop members, the stop engagement member moving with the slider between the two stop members.

14. The laser cutting head of claim 9, wherein a third heat dissipation channel, a third inlet and a third outlet are provided in the collimating lens holder, and the third inlet and the third outlet are in communication with the third heat dissipation channel.

15. The laser cutting head of claim 8, wherein a fourth heat dissipation channel is disposed in the second housing, and a fourth inlet and a second outlet are disposed on the first protective assembly, and the fourth heat dissipation channel is in communication with the fourth inlet and the second outlet.

16. The laser cutting head of claim 1, wherein the sealing member is a flood plug seal, the flood plug seal is located in the second lens seat, one side surface of the flood plug seal is attached to the second protective lens, and the other side surface of the flood plug seal is attached to the top of the lower mounting seat.

17. The laser cutting head of claim 1, wherein the second protection assembly further comprises a second adapter block disposed on a side of the upper mounting base facing away from the lower mounting base, the second adapter block being connected to the optical module, and a fifth heat dissipation channel being disposed in the second adapter block.