CN117182352B

CN117182352B - Laser cutting head

Info

Publication number: CN117182352B
Application number: CN202311463409.2A
Authority: CN
Inventors: 杨麒; 王法平; 刘明峰; 施建宏; 夏素旗; 闫大鹏
Original assignee: Wuhan Raycus Fiber Laser Technologies Co Ltd
Current assignee: Wuhan Raycus Fiber Laser Technologies Co Ltd
Priority date: 2023-11-06
Filing date: 2023-11-06
Publication date: 2024-02-20
Anticipated expiration: 2043-11-06
Also published as: CN117182352A

Abstract

The application discloses laser cutting head, including the fiber connector that connects gradually, a first protection subassembly, optical module, second protection subassembly and nozzle subassembly of blowing, wherein, nozzle subassembly of blowing includes first sleeve, first casing and nozzle, first sleeve is equipped with first logical light and blows the passageway, first casing cover is located on the first sleeve, form first heat dissipation passageway between first casing and the first sleeve, be equipped with the cooling air flue on the first casing, first import, first export and first gas outlet, first import and first export communicate with first heat dissipation passageway, first gas outlet communicates with the cooling air flue; the nozzle is connected with the first shell, the first ventilation and air blowing channel is communicated with the nozzle, and the first air outlet is positioned on one side of the first shell, which is close to the nozzle. The problems that the existing cutting head only designs a heat dissipation structure on the shell of the optical module and cannot meet heat dissipation requirements are solved, and the cutting head has the advantages of being good in heat dissipation effect and good in cutting performance and is suitable for high-power lasers.

Description

Laser cutting head

Technical Field

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

Background

The laser cutting machine is a laser cutting machine using a fiber laser generator as a light source. The optical fiber laser is a novel laser capable of outputting high-energy-density laser beams, the output laser beams can be gathered on the surface of a workpiece, so that the area of the workpiece irradiated by an ultrafine focus spot is instantaneously melted and gasified, and the automatic cutting is realized by moving the irradiation position of the spot through a numerical control mechanical system. The optical fiber laser cutting machine can be used for plane cutting and bevel cutting, and has neat and smooth edges, thereby being suitable for high-precision cutting of metal plates and the like.

The cutting head is an important part of the optical fiber laser cutting machine, and requirements on cutting quality of a cutting sheet material, cutting speed of the sheet material and the like are higher and higher when the optical fiber laser cutting machine is applied to the high-end precision field. In the related art, only the first housing of the optical module is generally subjected to heat dissipation treatment, and the heat dissipation effect is generally that the temperature of the cutting head is higher and higher along with the increase of the power of the laser, so that the existing heat dissipation design cannot meet the requirements.

Disclosure of Invention

The embodiment of the application provides a laser cutting head and a laser cutting system to solve the problem that current cutting head only designs heat radiation structure at optical module, can't satisfy the heat dissipation demand.

In a first aspect, an embodiment of the present application provides a laser cutting head, including fiber connector, first protection subassembly, optical module, second protection subassembly and the nozzle subassembly of blowing that connects gradually, 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, a first heat dissipation channel is formed between the first shell and the first sleeve, a cooling air channel, a first inlet, a first outlet and a first air outlet are formed in 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 nozzle is connected with the first shell, the first light-transmitting air blowing channel is communicated with the nozzle, and the first air outlet is positioned on one side of the first shell, which is close to the nozzle.

Optionally, the nozzle blowing assembly further comprises:

the flow equalization block is arranged in the first sleeve, a second light ventilation and blowing channel is arranged in the flow equalization block, the second light ventilation and blowing channel is communicated with the first light ventilation and 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 along the circumferential direction of the flow equalization block at intervals, 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 channels, and the air outlet of the second air channel is communicated with the second light ventilation and blowing channel.

Optionally, the surface of piece that flow equalizes is equipped with a plurality of first recesses and second recess, first recess is followed flow equalizing block's axis direction extends, the second recess is followed flow equalizing block's circumference distributes, the second recess set up in flow equalizing block deviates from one side of second protection subassembly, first recess with second recess intercommunication, first air flue with second recess intercommunication, flow equalizing block with first sleeve sealing connection, first sleeve inner wall shutoff first recess with the opening of second recess forms the second air flue.

Optionally, the nozzle blowing assembly further comprises:

the air blowing cover plate is arranged in the first sleeve and positioned on one side, close to the second protection assembly, of the flow equalizing block, a first communication groove is formed in one side face, away from the flow equalizing block, of the air blowing cover plate, and the first communication groove is communicated with a plurality of air inlets of the first air channels.

Optionally, the outer surface of the first sleeve is provided with fins which are spirally arranged, and the fins are in sealing connection with the first shell to form the first heat dissipation channel.

Optionally, the first housing includes:

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.

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

Optionally, the first protection subassembly includes first mount pad, first guard mirror and diaphragm, first mount pad with the fiber connector is connected, first guard mirror with the diaphragm install in the first mount pad, first guard mirror compares the diaphragm is close to the fiber connector.

Optionally, the diaphragm includes first logical light passageway, the inner wall of first logical light passageway is equipped with the light blocking face, the light blocking face is close to first guard mirror, the light blocking face is equipped with black high temperature resistant coating, black high temperature resistant coating carries out burr treatment.

Optionally, the diaphragm is connected with the first mount pad to form a second heat dissipation channel, a second inlet and a second outlet are arranged on the first mount pad, and the second inlet and the second outlet are respectively communicated with the second heat dissipation channel.

Optionally, the optical module includes:

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.

Optionally, the collimation assembly includes:

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.

Optionally, the collimation assembly further includes a fixing bracket, the fixing bracket and the second housing, and the driving mechanism is mounted on the fixing bracket.

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

Optionally, the actuating mechanism still includes magnetic scale and induction piece, the induction piece with voice coil motor signal connection, the induction piece with the magnetic scale sets up relatively, the induction piece is fixed to be set up, the magnetic scale with the collimation mirror seat is connected.

Optionally, the sliding mechanism further comprises two limiting parts and a limiting matching part, wherein the limiting matching part is arranged on the sliding block, the two limiting parts are arranged at intervals, the limiting matching part is located between the two limiting parts, and the limiting matching part moves between the two limiting parts along with the sliding block.

Optionally, a third heat dissipation channel, a third inlet and a third outlet are arranged in the collimating lens seat, and the third inlet and the third outlet are communicated with the third heat dissipation channel.

Optionally, a fourth heat dissipation channel is arranged in the second shell, a fourth inlet and a second outlet are arranged on the first protection component, and the fourth heat dissipation channel is communicated with the fourth inlet and the second outlet.

Optionally, the second protection component includes: the protective device comprises a lower mounting seat, an upper mounting seat, a second protective lens, a second lens seat and a sealing element, wherein the lower mounting seat is in butt joint with the upper mounting seat, the second protective lens is mounted on the second lens seat, the second lens seat is fixed between the lower mounting seat and the upper mounting seat, the sealing element is positioned between the second protective lens and the lower mounting seat, and the sealing element is in sealing connection with the second protective lens and the lower mounting seat.

Optionally, the sealing member is the pan-plug seal, the pan-plug seal is located in the second mirror seat, one side of the pan-plug seal with the laminating of second protection mirror, another side with the top laminating of mount pad down.

Optionally, the second protection assembly further includes a second adapter block, disposed on a side of the upper mounting seat away from the lower mounting seat, the second adapter block is connected with the optical module, and a fifth heat dissipation channel is disposed in the second adapter block.

Optionally, the lower mount pad is equipped with first air inlet and second air inlet, first air inlet and first logical light blowing passageway intercommunication, the second air inlet with cooling air flue intercommunication.

The embodiment of the application provides a laser cutting head, including the fiber connector who connects gradually, first protection subassembly, optical module, second protection subassembly and nozzle subassembly of blowing, first protection subassembly and second protection subassembly set up respectively in optical module's both sides, play dirt-proof purpose, prevent that the dust from getting into inside optical module from optical module's both sides, influence the performance of optical lens, guarantee the reliability of laser cutting head, the nozzle subassembly of blowing includes first sleeve, first casing and nozzle, form first heat dissipation channel between first sleeve and the first casing, set up the cooling air flue in the first casing, the mode through liquid cooling and air cooling blows the subassembly heat dissipation for the nozzle simultaneously, the radiating effect is good, the laser cutting head is applicable to high-power laser, overcome current cutting head and only design heat radiation structure on optical module's casing, unable problem that satisfies the heat dissipation demand has the radiating effect is good, the advantage that the cutting performance is good, be applicable to high-power laser.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort to a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.

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

Fig. 2 is a side view of a first protective component provided in an embodiment of the present application.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a schematic structural diagram of a diaphragm according to an embodiment of the present application.

Fig. 5 is another side view of the first protective component provided in an embodiment of the present application.

Fig. 6 is an exploded view of a first protective component provided in an embodiment of the present application.

Fig. 7 is a side view of an optical module provided in an embodiment of the present application.

Fig. 8 is a sectional view of B-B in fig. 7.

Fig. 9 is a perspective view of one form of a collimation assembly provided in an embodiment of the present application.

Fig. 10 is a side view of fig. 9.

Fig. 11 is a cross-sectional view of fig. 10C-C.

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

Fig. 13 is an exploded view of fig. 12.

Fig. 14 is another side view of an optical module provided in an embodiment of the present application.

Fig. 15 is a sectional view D-D of fig. 14.

Fig. 16 is a sectional view of E-E of fig. 14.

Fig. 17 is a perspective view of a second protection component provided in an embodiment of the present application.

Fig. 18 is a perspective cross-sectional view of a second protective assembly provided in an embodiment of the present application.

Fig. 19 is a perspective view of a nozzle blowing assembly provided in an embodiment of the present application.

Fig. 20 is a perspective cross-sectional view of a nozzle blow assembly provided in an embodiment of the present application.

Fig. 21 is an exploded view of a nozzle blow assembly provided in an embodiment of the present application.

Fig. 22 is a cross-sectional view of a first sleeve in a nozzle blow assembly provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The embodiment of the application provides a laser cutting head, which is applied to a high-power fiber laser, such as a kilowatt-level high-power fiber laser, so as to solve the problem that the existing cutting head only designs a heat dissipation structure on an optical module and cannot meet heat dissipation requirements. The following description will be given with reference to the accompanying drawings.

Referring to fig. 1, the laser cutting head includes an optical fiber connector 100, a first protection assembly 200, an optical module 300, a second protection assembly 400, and a nozzle blowing assembly 500, which are sequentially connected.

In this embodiment of the present application, the fiber connector 100 may be a QB connector, a QBH connector, a QC connector, and configured to be connected to an output head of a fiber laser, where the fiber connector 100 is configured to be adapted to the output head of the fiber laser, so as to guide a laser beam output by the fiber laser into a laser cutting head.

In this embodiment, referring to fig. 2 and 3, the first protection assembly 200 at least includes a first mounting seat 210 and a first protection mirror 220, and the first protection mirror 220 is detachably mounted on the first mounting seat 210, so that the first protection mirror 220 is convenient to be replaced, dust is prevented from entering the optical module 300 from the optical fiber connector 100 side, the optical module 300 is protected, and the reliability of the optical module 300 is improved.

In this embodiment, referring to fig. 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 330, the collimating mirror of the collimating component 310 and the focusing mirror of the focusing component 320 are coaxially disposed, and compared with the focusing mirror, the collimating mirror is close to the first protection component 200, after being collimated by the collimating component 310, the laser beam output by the fiber laser is focused by the focusing component 320, and then is emitted from the nozzle blowing component 500 for laser cutting.

In an embodiment of the present application, referring to fig. 19 and 20, a 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 two open ends, a first light-passing blowing channel 511 is arranged in the center of the first sleeve 510, the laser beam collimated and focused by the optical module 300 is emitted from the nozzle 540 through the first light-passing blowing channel 511, the first light-passing blowing channel 511 is also connected with an external air source and used for transmitting pressurized air, and slag formed on the laser cutting piece is blown away through the pressurized air, so that a cutting channel is formed, and laser cutting is completed. The first casing 520 is sleeved on the first sleeve 510, a first heat dissipation channel 530 is formed between the first casing 520 and the first sleeve 510, the first heat dissipation channel 530 is connected with an external water cooler, circulating cooling liquid is introduced into the first heat dissipation channel 530, the cooling liquid can be water, oil or a water-oil mixture, a cooling air channel 521, a first inlet 522, a first outlet 523 and a first air outlet 524 are further arranged on the first casing 520, the first inlet 522 and the first outlet 523 are communicated with the first heat dissipation channel 530, the first heat dissipation channel 530 is connected with an external water cooling mechanism through the first inlet 522 and the first outlet 523, the cooling air channel 521 is connected with an external cooling air source, the first air outlet 524 is communicated with the cooling air channel 521, the first air outlet 524 is arranged on one side close to the nozzle 540, and cold air directly acts on the nozzle 540 to dissipate heat through cold air to the nozzle 540. The first heat dissipation channel 530 dissipates heat from the nozzle blowing assembly 500, so that the nozzle blowing assembly 500 is prevented from being excessively high in temperature to affect surrounding optical modules 300. The nozzle 540 is connected to a side of the first housing 520 facing away from the second protection assembly 400, the first ventilation and air blowing channel 511 is communicated with the nozzle 540, and the first air outlet 524 is located on a side of the first housing 520 close to the nozzle 540.

It can be appreciated that, in this embodiment of the present application, by setting the first protection component 200 and the second protection component 400 on the light incident side and the light emergent side of the optical module 300, both sides of the optical module 300 are blocked, so that dust is prevented from entering the optical module 300, the optical reliability of the collimating component 310 and the focusing component 320 of the optical module 300 is ensured, the occurrence of the condition that the collimating component 310 and the focusing component 320 are burnt due to the heat generated by the accumulated dust is avoided, and the service life of the optical lens is prolonged. In addition, a first heat dissipation channel 530 is formed between the first sleeve 510 and the first housing 520 of the nozzle blowing assembly 500 in the embodiment of the application, the nozzle blowing assembly 500 is cooled and dissipated through the first heat dissipation channel 530, the cooling air channel 521 is further arranged in the first housing 520 to cool the nozzle 540, if the first heat dissipation channel 530 is not arranged, the temperature of cooling air in the cooling air channel 521 is higher, the nozzle 540 cannot be cooled and dissipated, the nozzle 540 is easy to burn out, 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 is transferred to the optical module 300, the temperature of the optical module 300 is higher, and the collimating assembly 310 and the focusing assembly 320 are burnt out, so that the service life of the optical module 300 is influenced.

In some embodiments, referring to fig. 20, fig. 21 and fig. 22, the nozzle blowing assembly 500 further includes a flow equalizing block 560, a mounting hole 513 and a first ventilation blowing channel 511 are formed in the first sleeve 510, the mounting hole 513 is adapted to the flow equalizing block 560, the mounting hole 513 is located above the first ventilation blowing channel 511, the flow equalizing block 560 is installed in the first sleeve 510, a second ventilation blowing channel 561 is formed in the flow equalizing block 560, the first ventilation blowing channel 511 is communicated with the second ventilation blowing channel 561, the first ventilation blowing channel 511 and the second ventilation blowing channel 561 are coaxially disposed with the first sleeve 510, the second ventilation blowing channel 561 is located above the first ventilation blowing channel 511, 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 562 are disposed at intervals along the circumferential direction of the flow equalizing block 560, the second air channels 562 extend along the axial direction of the first sleeve 510, at least one first air channel 550 is disposed on the first sleeve 510, the first air channels 550 extend along the axial direction of the first sleeve 510, the first air channels 550 face the second air channel protection assembly 400 and are communicated with the second air channel protection assembly 400, the second air channels 400 face the second air channel protection assembly 400 and are communicated with the second air channel protection assembly 400 and the second air channel protection assembly 562.

It can be appreciated that the first air channel 550 is connected with an external air source, along the radial direction of the first sleeve 510, the first air channel 550 is located at the outer side of the second air channel 562, the second air channel 562 is located at the outer side of the second ventilation and air blowing channel 561, air enters the second ventilation and air blowing channel 561 from the first air channel 550 after entering the second air channel 562, then enters the nozzle 540 from the first ventilation and air blowing channel 511, and the air is subjected to multiple steering design.

On the basis of the above embodiment, as shown in fig. 21, the 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 that of the first air passages 550, so as to improve the equalizing effect. The greater the number of second gas passages 562, the better the pressure equalizing effect.

On the basis of the above embodiment, referring to fig. 21, the outer surface of the flow equalizing block 560 is provided with a plurality of first grooves 563 and second grooves 564, the first grooves 563 extend along the axial direction of the flow equalizing block 560, the second grooves 564 are distributed along the circumferential direction of the flow equalizing block 560, the second grooves 564 are disposed on one side of the flow equalizing block 560 away from the second protection assembly 400, the first grooves 563 are communicated with the second grooves 564, the first grooves 563 and the second grooves 564 are in a semicircular groove structure, the flow equalizing block 560 is in sealing connection with the first sleeve 510, the openings of the first grooves 563 and the second grooves 564 are blocked by the inner wall of the first sleeve 510 to form the second air passages 562, and the first air passages 550 are communicated with the second grooves 564.

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

Referring to fig. 22, a third groove 514 is formed on the inner wall of the first sleeve 510, the third groove 514 is close to the first light-transmitting and air-blowing channel 511, the third groove 514 is communicated with the air outlet of the first air channel 550, 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, and air pressure loss is reduced.

In some embodiments, referring to fig. 20, the nozzle blowing assembly 500 further includes a blowing cover plate 570, the blowing cover plate 570 is in an annular disc structure, the blowing cover plate 570 is disposed in the first housing 520, the blowing cover plate 570 is connected with the first housing 520 through a pin, the blowing cover plate 570 is disposed on one side of the first sleeve 510 close to the optical module 300, the blowing cover plate 570 is connected with the first sleeve 510 in a sealing manner through a sealing ring, a side surface of the blowing cover plate 570 facing away from the flow equalizing block 560 is provided with a first communicating groove 571, the first communicating groove 571 is in an arc shape, the first communicating groove 571 is communicated with air inlets of a plurality of first air channels 550, such as the air inlets of two first air channels 550 share one first communicating groove 571, and the air inlets of four first air channels 550 may share one first communicating groove 571. The air inlet ends of the first air channels 550 are converged through the air blowing cover plate 570, so that the first air channels 550 can be used for simultaneously introducing air, and the pressure equalizing effect is ensured.

In some embodiments, referring to fig. 20 and 22, the outer surface of the first sleeve 510 is provided with fins 512 that are spirally arranged, the fins 512 are in sealing connection with the first housing 520, a first heat dissipation channel 530 is enclosed between the groove between adjacent fins 512 and the interior of the first housing 520, and the spiral first heat dissipation channel 530 increases the length of the heat dissipation channel, thereby improving the heat dissipation effect.

In the above embodiment, the surface of the first sleeve 510 has two fins 512 that are spirally disposed, the spiral directions of the two fins 512 are the same, and two spiral first heat dissipation channels 530 are formed between the first sleeve 510 and the first housing 520. Further increase the length of heat dissipation channel, improve the radiating effect, in addition, even a first heat dissipation channel 530 blocks up, another can circulate, guarantees the reliability of heat dissipation.

In some embodiments, referring to fig. 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, a first heat dissipation channel 530 is formed between the cone 526 and the first sleeve 510 in a sealing manner, a flange connection portion is disposed on a side, close to the connection of the second protection assembly 400, of the cone 526, the cone 526 is detachably connected to the second protection assembly 400 through a pin shaft, a side, close to the nozzle 540, of the cone 526 is cylindrical, the ceramic ring 527 is connected to the nozzle 540, the cooling air channel 521 is disposed in the cone 526 and the ceramic ring 527 in a penetrating manner, and a first air outlet is disposed on a side, close to the nozzle 540, of the ceramic ring.

It can be appreciated 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 cooling effect of the nozzle 540.

In addition to the above-described embodiments, as shown in fig. 19, 20 and 21, the first housing 520 further includes a first adapter 528 disposed between the cone 526 and the ceramic ring 527, the first adapter 528 connects the cone 526 and the ceramic ring 527, the ceramic ring 527 is connected to the first adapter 528 by a connection screw cap 529, and the cooling air duct 521 is disposed through the cone 526, the adapter 528 and the ceramic ring 527. The first housing 520 is assembled in a split structure, and is assembled and disassembled, so that maintenance is facilitated.

The cooling air channel 521 comprises a first sub-section, a second sub-section, a third sub-section and a fourth sub-section, wherein the first sub-section extends along the axis of the cone 526, the second sub-section is arranged on one side surface of the first adapter block 528, which faces the cone 526, the second sub-section is in a strip groove shape, one end of the second sub-section is connected with the first sub-section, the other end of the second sub-section is connected with the third sub-section, the third sub-section is arranged in the first adapter block 528, the third sub-section is in a bent shape, 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, air is blown to the nozzle 540 through the annular first air outlet 524, and the blowing area is large, so that the heat dissipation of the nozzle 540 is facilitated.

In some embodiments, referring to fig. 1, 2 and 3, the first protection assembly 200 includes a first mount 210, a first protection mirror 220 and a diaphragm 230, the first mount 210 is connected with the optical fiber connector 100, the first protection mirror 220 and the diaphragm 230 are mounted in the first mount 210, and the first protection mirror 220 is closer to the optical fiber connector 100 than the diaphragm 230.

In this embodiment of the application, the first protection mirror 220 has dustproof effect, avoids dust to get into in the optical module 300 of rear side, and diaphragm 230 sets up in first mount pad 210, plays the light blocking effect, and is integrated integrative with first protection mirror 220 and diaphragm 230 through first mount pad 210, forms first protection subassembly 200, is favorable to first protection subassembly 200 integral erection and dismantlement, has improved module maintainability.

In some embodiments, referring to fig. 4, the diaphragm 230 is in a cylindrical structure, the diaphragm 230 includes a first light-passing channel 231, a light blocking surface 232 is disposed on an inner wall of the first light-passing channel 231, the light blocking surface 232 is close to the first protection mirror 220, the light blocking surface 232 is in a horn shape, a diameter of the light blocking surface 232 close to one end of the first protection mirror 220 is larger than a diameter of the other end, light blocking is performed through the light blocking surface 232, and a light blocking area is large.

In some embodiments, the light blocking surface 232 is provided with a black high temperature resistant coating layer, which can withstand a temperature of 1400 ℃, improving the high temperature resistance of the diaphragm 230.

In some embodiments, the black high temperature resistant coating performs the burr treatment, which increases the laser absorptivity of the light blocking surface 232, reduces the laser reflection, prevents the scattered light caused by the laser reflection, and makes the diaphragm 230 more stable.

In some embodiments, referring to fig. 2 and 3, the outer surface of the diaphragm 230 is hermetically connected to the inner surface of the first mount 210, a second heat dissipation channel 240 is disposed between the diaphragm 230 and the first mount 210, and a second inlet 241 and a second outlet 242 are disposed on the first mount 210, where the second inlet 241 and the second outlet 242 are in communication with the second heat dissipation channel 240.

The second heat dissipation channel 240 dissipates heat to the diaphragm 230, so that the condition that the diaphragm 230 is physically damaged due to overhigh temperature of the diaphragm 230 is avoided, heat is prevented from being transferred to the lower side optical module 300, the optical module 300 is protected, and the reliability of the laser cutting head is improved.

On the basis of the above embodiment, as shown in fig. 4, the outer surface of the diaphragm 230 is provided with the fourth groove 233, the diaphragm 230 is in sealing connection with the first mounting seat 210, the fourth groove 233 and the inner wall of the first mounting seat 210 enclose the second heat dissipation channel 240, the fourth groove 233 is in a non-closed ring shape, the second inlet 241 is disposed at one end of the fourth groove 233, the second outlet 242 is disposed at the other end of the fourth groove 233, the area of the second heat dissipation channel 240 is increased as much as possible, and the heat dissipation effect is improved.

On the basis of the above embodiment, referring to fig. 3 and 6, the first protection assembly 200 further includes a first lens holder 250, the first protection lens 220 is mounted on the first lens holder 250, and the first lens holder 250 is mounted on the first mounting base 210 in a drawer manner, so as to facilitate replacement and disassembly of the first lens holder 250.

In some embodiments, referring to fig. 17 and 18, the second protection assembly 400 includes a lower mount 410, an upper mount 420, a second protection mirror 430, a second mirror mount 440, and a sealing member 450, the lower mount 410 is in butt joint with the upper mount 420, the lower mount 410 is detachably connected with the upper mount 420, the second protection mirror 430 is mounted on the second mirror mount 440, the second mirror mount 440 is fixed between the lower mount 410 and the upper mount 420, the sealing member 450 is located between the second protection mirror 430 and the lower mount 410, and the sealing member 450 is in sealing connection with the second protection mirror 430 and the lower mount 410. The second protection assembly 400 is modularized, so that the second protection assembly 400 is convenient to install and disassemble and convenient to operate.

It can be understood that the air outlet of the second air duct 562 faces the second protection assembly 400, and the air discharged from the second air duct 562 is sprayed to the second protection assembly 400, so that the second protection assembly 400 is designed into a sealing structure, and the air is turned after striking the second protection mirror 430, flows in the second ventilation and air blowing channel 561 below, and realizes pressure equalization.

On the basis of the above embodiment, as shown in fig. 18, the sealing member 450 is a pan plug seal, the pan plug seal is located in the second lens seat 440, one side surface of the pan plug seal is attached to the second protective lens 430, and the other side surface is attached to the top of the lower mounting seat 410.

It can be appreciated that the air outlet of the second air channel 562 blows air to the second protection component 400, and after the flood seal is inflated, the more tightly the two sides of the flood seal are attached to the second protection mirror 430 and the lower mounting seat 410, the greater the air pressure, the better the sealing effect.

On the basis of the above embodiment, as shown in fig. 18, a monitoring mounting plate 460 is provided in the upper mounting seat 420, and a temperature sensor, an air pressure sensor and a photo sensor are provided on the monitoring mounting plate 460.

On the basis of the above embodiment, as shown in fig. 1 and 17, the lower mounting seat 410 is provided with a first air inlet 411 and a second air inlet 412, one side of the lower mounting seat 410 facing the air blowing cover plate 570 is provided with a second communication groove 413, the second communication groove 413 corresponds to the first communication groove 571, the first air inlet 411 is communicated with the second communication groove 413, the second communication groove 413 is communicated with the first communication groove 571, and thus the first air inlet 411 is communicated with the first ventilation air blowing channel 511, and the second air inlet 412 is communicated with the cooling air channel 521.

As a modification, the first air inlet 411 and the second air inlet 412 may be directly provided on the nozzle blowing assembly 500 to enable air intake.

In some embodiments, referring to fig. 18, the second protection assembly 400 further includes a second adapter block 470 disposed on a side of the upper mount 420 facing away from the lower mount 410, the second adapter block 470 connecting the optical module 300 and the lower mount 410. A plurality of second adapter blocks 470 may be provided according to a focusing distance of the focusing assembly 320. The second adapter block 470 is provided with a fifth heat dissipation channel 480, and the fifth heat dissipation channel 480 cools and dissipates heat to the focusing assembly 320, so as to improve the heat dissipation effect of the optical module 300.

On the basis of the above embodiment, as shown in fig. 9 to 13, the collimator assembly 310 includes a collimator lens 311, a collimator lens holder 312, a sliding mechanism 313, and a driving mechanism 314. The collimating mirror 311 is installed in the collimating mirror seat 312, the sliding mechanism 313 can select standard guide rail module, the installation difficulty is reduced, the structural stability is improved, the precision and the bearing capacity are improved, the structural maintainability, the interchangeability and the stability are improved, the sliding mechanism 313 comprises a guide rail 3131 and a sliding block 3132, the collimating mirror seat 312 is fixedly connected with the sliding block 3132, the driving mechanism 314 is connected with the sliding block 3132, the driving mechanism 314 drives the sliding block 3132 to move, the sliding block 3132 drives the collimating mirror seat 312 to be close to or far away from the first protection component 200, and the automatic adjustment of the collimating mirror 311 is realized. The automatic adjusting precision is high, and the adjusting operation is simple.

The collimating component 310 adopts a modularized design to form an independent functional module in the whole cutting head, the collimating component 310 is convenient to assemble and disassemble, high in reliability and high in maintainability, and the module and the cutting head shell are designed to be of a quick-dismantling structure, so that the collimating lens can be conveniently maintained and replaced.

On the basis of the above embodiment, as shown in fig. 9, the sliding mechanism 313 further includes two stoppers 3133 and a stopper fitting 3134, the stoppers 3133 are stoppers, the stopper fitting 3134 is a baffle, the stopper fitting 3134 is disposed on the slider 3132, the two stoppers 3133 are disposed at intervals, and the stopper fitting 3134 is disposed between the two stoppers 3133. When the driving mechanism 314 drives the slider 3132 to move, the limit fitting member 3134 is driven to move until the limit fitting member 3134 abuts against the limit member 3133, and the collimator lens 311 reaches the limit position.

In some embodiments, referring to fig. 9 and 13, the collimation assembly 310 further includes a fixing bracket 315, the fixing bracket 315 is disposed on the second housing 330, and the driving mechanism 314 is mounted on the fixing bracket 315.

In some embodiments, referring to fig. 9 and 12, the driving mechanism 314 includes a voice coil motor 3141, where the voice coil motor 3141 is connected to the sliding mechanism 313, and the voice coil motor 3141 is used to drive the collimating mirror holder 312 to approach or depart from the first protection component 200. The voice coil motor has the advantages of large moment, strong bearing capacity, high acceleration, quick adjustment action of the collimating lens 311, quick zooming time, small volume and compact structure.

In some embodiments, referring to fig. 12, the driving mechanism 314 further includes a magnetic scale 3142 and a sensing member 3143, the sensing member 3143 is in signal connection with the voice coil motor 3141, the sensing member 3143 is disposed opposite to the magnetic scale 3142, the sensing member 3143 is fixedly disposed, the magnetic scale 3142 is connected to the collimating lens holder 312, and the sensing member 3143 moves relative to the magnetic scale 3142.

It can be appreciated that the moving distance of the collimator 311 can be precisely calculated by matching the magnetic scale 3142 and the sensing member 3143, and precise adjustment of the collimator 311 can be realized.

Referring to fig. 12, the fixing bracket 315 includes a motor fixing plate 3151 and a coil fixing plate 3152, the motor fixing plate 3151 is fixedly connected with the second housing 330, the voice coil motor 3141 is fixed on one side of the motor fixing plate 3151, the coil fixing plate 3152 is fixed on a coil end portion of the voice coil motor 3141, the coil fixing plate 3152 is fixedly connected with the slider 3132, and the stopper 3133 is provided on the motor fixing plate 3151. The collimating assembly 310 and the second shell 330 are of a quick-dismantling modularized structure, so that the collimating mirror 311 is convenient to maintain, when the collimating mirror 311 is damaged, the collimating assembly 310 is only required to be wholly dismantled, so that the product maintainability is improved, meanwhile, the collimating mirror 311 and the collimating mirror seat 312 are of a standardized module structure, and only the standardized module is required to be replaced when the collimating mirror 311 is maintained, so that the installation and maintenance are simple.

In some embodiments, as shown in fig. 10 and 11, a third heat dissipation channel 3121, a third inlet 3122 and a third outlet 3123 are provided in the collimating lens holder 312, and the third inlet 3122 and the third outlet 3123 are in communication with the third heat dissipation channel 3121.

It can be appreciated that in the embodiment of the present application, by separately setting the third heat dissipation channel 3121 in the collimating lens seat 312, heat can be directly dissipated for the collimating lens 311, so as to avoid the burning of the collimating lens 311, ensure the safe and reliable collimating lens 311, and be more suitable for the cutting application of the high-power laser.

In some embodiments, referring to fig. 14, 15 and 16, a fourth heat dissipation channel 331 is provided in the second housing 330, and the fifth heat dissipation channel 480 communicates with the fourth heat dissipation channel 331, and the fourth heat dissipation channel 331 flows through the side surfaces and the top surface of the second housing 330.

Referring to fig. 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 port 3313, the fourth inlet port 3313 is disposed on the first mounting seat 210, the water inlet channel 3311 is disposed on one side of the second housing 330, the water outlet channel 3312 is disposed on the other side of the second housing 330, the two side surfaces are opposite, the water inlet channel 3311 and the water outlet channel 3312 are communicated with the fifth heat dissipation channel 480, the water outlet channel 3312 and the second heat dissipation channel 240 share the second outlet port 242, so as to integrate pipelines and reduce openings.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.

The foregoing has outlined the detailed description of the laser cutting head provided in the embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided only to assist in understanding the method of the present application and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims

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 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:

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:

a collimation assembly mounted within the second housing;

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;

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.