CN114346487A

CN114346487A - Gas conveying gas path system for laser processing equipment

Info

Publication number: CN114346487A
Application number: CN202111627675.5A
Authority: CN
Inventors: 龚辉; 黎永坚; 蒋峰
Original assignee: Suzhou Maxphotonics Co Ltd
Current assignee: Suzhou Maxphotonics Co Ltd
Priority date: 2021-09-10
Filing date: 2021-12-28
Publication date: 2022-04-15
Also published as: CN114346417A; CN114346488A; CN114346417B; CN217253759U; CN114346490B; CN217253757U; CN114346408A; CN114346491A; CN114346490A

Abstract

The invention relates to the technical field of laser processing, and discloses a gas conveying gas path system for laser processing equipment, which comprises a cooling gas path and a protection gas path, wherein the cooling gas path integrally wraps the part of the laser processing equipment except for a spray pipe assembly, and the front end of the protection gas path is communicated with the inside of the spray pipe assembly. Cooling gas in the cooling gas path is guided into the spray pipe assembly after passing through the optical assembly and is sprayed out of the spray pipe to cool the whole optical assembly and the optical lens, and protective gas in the protective gas path is introduced into the spray pipe assembly to cool the spray pipe assembly and blow away smoke dust generated in a workpiece to be processed; the combination of the two gas paths ensures the full air-cooled design, is favorable for reducing the weight of the laser processing head, and cools the devices in the laser processing head.

Description

Gas conveying gas path system for laser processing equipment

[ technical field ] A method for producing a semiconductor device

The embodiment of the invention relates to the technical field of laser air cooling, in particular to a gas conveying gas path system for laser processing equipment.

[ background of the invention ]

Laser welding is a novel welding mode using a focused high-energy laser beam as a heating heat source, and has been widely applied in the manufacturing fields of automobiles, engineering machinery, airplanes, household appliances, high-speed rails, ships, 3C electronics and the like due to the advantages of small heat input, low welding deformation, high weld joint strength, non-contact operation, rich welding types, easiness in automatic intelligent processing, high welding speed, high welding precision, large welding depth-to-width ratio and the like. The complete platform type welding equipment is usually large in size and weight, complex in structure, high in cost and suitable for large enterprises for batch processing operation.

In order to expand the application of laser processing to wider users, the handheld laser welding equipment is produced, the welding processing head is held by hands to finish relative movement for welding processing, and a complex and huge movement control system and a machine tool are omitted, so that the portable laser welding equipment can be made. Through development for years, the handheld laser welding has the advantages of laser welding, small size, light weight, low cost, flexible processing mode, wide application range and the like, has the cost performance advantage equivalent to that of traditional welding equipment such as arc welding, argon arc welding and the like, and gradually obtains wide attention and application.

The important components of the handheld laser welding equipment are a laser and a handheld laser welding head, the difference between the laser and the platform type machining is not large, but the requirement of the welding head used as the handheld machining application is small in size, light in weight, high in reliability and easy to operate compared with the requirement of the platform type machining, and particularly the size and the weight are required to be small enough to be suitable for being held by hands to complete the welding machining. The conventional integrated laser output head and welding head equipment needs to be cooled by introducing cooling water, so that the risk of water leakage exists, the integrated laser output head and welding head equipment is large in size and weight and high in cost, and smoke generated by workpieces to be welded easily pollutes protective lenses inside the integrated laser output head and welding head equipment, so that the integrated laser output head and the welding head equipment are damaged.

It is therefore necessary to design a laser machining air cooling system for cooling the optical components of the laser machining head and blowing off fumes generated at the work piece to be welded.

[ summary of the invention ]

The embodiment of the invention aims to provide a gas conveying gas path system for laser processing equipment, and the full air-cooled design is favorable for preventing a laser processing head from being polluted by processing smoke dust and cooling an optical assembly in the laser processing head.

The embodiment of the invention adopts the following technical scheme for solving the technical problems:

the gas conveying gas path system for the laser processing equipment comprises a cooling gas path and a protection gas path, wherein the cooling gas path integrally covers the periphery of the part, except for a spray pipe assembly, of the laser processing equipment, and the front end of the protection gas path is communicated with the inside of the spray pipe assembly.

As a preferable scheme, the cooling gas path entirely covers the peripheral interlayer space of the portion of the laser processing device except for the nozzle assembly, and the cooling gas of the cooling gas path fills the entire interlayer space.

Preferably, the cooling air path further comprises a cooling channel arranged around the periphery of the optical lens of the laser processing equipment, and the cooling channel is communicated with the interlayer space.

Preferably, the shape of the cooling channel is U-shaped, rectangular or semicircular.

Preferably, the cooling gas path is provided with a gas wall generator, the gas wall generator comprises a plurality of gas outlet channels which are arranged at the periphery of a light passage of the laser processing equipment at intervals, the plurality of gas outlet channels are all arranged to incline from the periphery to the axis of the light passage and are communicated with the light passage, and the inclination angles of the gas outlet channels of the gas wall generator are the same.

As a preferred scheme, the protection gas circuit include at least one with the intake duct of the inner passage intercommunication of spout subassembly, the cover gas in the protection gas circuit passes through the intake duct flows into in the spout subassembly during the effect of intake duct under the tangential direction of inner passage obtains a minute speed, makes the cover gas be in produce the helical flow in the spout subassembly.

Preferably, the air inlet channel is obliquely arranged; or the air inlet channel is spirally arranged around the axis of the internal channel; or the air inlet channel is arranged in an arc shape around the axis of the internal channel.

The invention has the beneficial effects that: the gas conveying gas path system is provided with a cooling gas path and a protection gas path, cooling gas in the cooling gas path is guided into the spray pipe assembly and sprayed out of the spray pipe after passing through the periphery of the laser processing equipment and the optical assembly, the cooling gas is used for cooling the whole optical assembly and the optical lens, and protection gas in the protection gas path is introduced into the spray pipe assembly, cools the spray pipe assembly and blows away smoke dust generated in a workpiece to be processed; the combination of the two gas paths ensures the full air-cooled design, is favorable for reducing the weight of the laser processing head, and cools the devices in the laser processing head. The design of two gas circuits has not only realized cooling and protecting optical assembly, adjusts the relative proportion of gaseous flow size in cooling gas circuit and the protection gas circuit simultaneously according to the processing demand, can make full use of outside gas air current.

[ description of the drawings ]

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

Fig. 1 is a schematic diagram of a laser welding gun and a laser according to an embodiment of the present invention.

Fig. 2 is a schematic overall structure diagram of a laser welding gun according to an embodiment of the present invention.

Fig. 3 is an exploded view of the laser welding torch according to the embodiment shown in fig. 2.

Fig. 4 is a schematic view of a cooling gas path connection structure of the laser welding gun of the embodiment shown in fig. 2.

Fig. 5 is a schematic structural diagram of the laser welding gun cooling channel arranged on the movable mounting part of the embodiment shown in fig. 2.

Fig. 6 is a front-end part schematic structural diagram of a gas conveying gas path system of the laser welding gun of the embodiment shown in fig. 2.

Fig. 7 is a schematic view of a gas wall ring of the laser welding torch of the embodiment shown in fig. 2.

Fig. 8 is another schematic view of the gas wall ring of the laser welding torch of the embodiment shown in fig. 2.

Fig. 9 is a schematic structural view of a nozzle assembly of the laser welding torch of the embodiment shown in fig. 2.

Fig. 10 is a schematic cross-sectional view of the spout assembly shown in fig. 9.

Fig. 11 is a schematic view of the gun barrel base of the spout assembly shown in fig. 9.

FIG. 12 is a schematic view of the laser welding torch of the embodiment of FIG. 2 with a wire feed assembly.

[ detailed description ] embodiments

In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. It should be noted that when an element is referred to as being "fixed to"/"mounted to" another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The technical solution and technical features of the present invention are specifically described by taking a laser welding gun as an example, but the technical solution of the present invention is not limited to be actually applied to a laser welding gun, and other laser processing equipment, such as a laser cutting gun, a laser cleaning gun, etc., having the same, similar or partially same structural features and working components as the laser welding gun, or having the same working principle and application scenario as the laser welding gun, and the technical solution of the present invention can also be applied to these laser processing equipment.

As shown in fig. 1, in order to solve the above problem, an embodiment of the present invention provides a laser welding torch 200, and a laser 100 is connected to a laser output head assembly of the laser welding torch 200 through an optical fiber to input laser light to the laser welding torch 200.

Referring to fig. 2, a laser welding gun is schematically disclosed, which has an overall shape comprising an execution part, a body part and a hand-held part, wherein the execution part and the body part are horizontally arranged, and the hand-held part is obliquely arranged, so that the laser welding gun is roughly pistol-shaped, and is convenient for ergonomic design and hand-held operation.

Referring to fig. 2 and 3, the laser welding gun structurally includes a nozzle assembly 2, a base 1, an optical lens assembly 3, a laser output head assembly 4, and a gas delivery gas path system 5. Wherein, base 1 correspondingly includes body part and handheld part, and spray tube subassembly 2 is the executive part.

Wherein, base 1 is the integral structure of integrated design, and base 1 includes horizontal segment 11 and slope section 12, and base 1 is equipped with the whole inner chamber that runs through horizontal segment 11 and slope section 12. The upper portion of slope section 12 is for holding section 13, and slope section 12 links up with horizontal segment 11 through this section 13 that holds, and spout subassembly 2 installs the front end at the horizontal segment of base 1, and optical lens subassembly 3 and laser output head subassembly 4 are all integrated to be installed at the inner chamber of base 1, make laser output head subassembly 4 and base 1 form an integral component.

Optical lens subassembly 3 includes protective mirror module 31, focus mirror module 32, speculum module 33 and collimating mirror module 34, protective mirror module 31 and focus mirror module 32 are located on base 1's horizontal segment 11, protective mirror module 31 is located focus mirror module 32's the place ahead, speculum module 33 and collimating mirror module 34 are located base 1 hold on the section 13, speculum module 33 is located focus mirror module 32's rear, collimating mirror module 34 is located speculum module 33's below, laser output head subassembly 4 is located on base 1's slope section 12, and be located collimating mirror module 34's rear, gas delivery gas circuit system 5 is introduced from base 1's rear end, set up along base 1, and draw forth from base 1's front end and spout subassembly 2's inside passage intercommunication.

The inside of base 1 is equipped with logical light passageway, leads to the light passageway and sets up along horizontal segment 11 and the slope section 12 of base 1. Laser output from laser output head subassembly 2 passes through collimating mirror module 34, speculum module 33 and focusing mirror module 32 collimation, reflection and focus back respectively in logical light passageway, through the internal passage of spray tube subassembly 2, jets out from the nozzle of spray tube subassembly 2, acts on by welding the object.

Referring to fig. 3 and 9, the nozzle assembly 2 is connected to the front end of the base 1 through the nozzle holder 21, the nozzle assembly 2 is provided with an inner passage 24 penetrating through the front and rear ends thereof, and the inner passage 24 is communicated with the light passage of the base 1. The rear end of the gun barrel seat 21 is provided with a connecting assembly, and the spray pipe assembly 2 is connected with the front end of the base 1 through the connecting assembly. Specifically, the connecting assembly comprises a flange plate, an insulating sheet and a bolt, and the bolt sequentially penetrates through the flange plate and the insulating sheet to be matched with a threaded hole formed in the front end face of the base to form fastening connection.

As shown in fig. 3, the protection mirror module 31 is disposed in front of the focusing mirror module 32, and the protection mirror module 31 is mainly used for blocking particulate matters such as smoke, splashes and the like which enter the light passage of the base 1 from the internal passage 24 of the nozzle assembly 2 probabilistically, and preventing the particulate matters from contacting the focusing mirror module 32 to cause pollution damage of the focusing mirror, so as to protect the focusing mirror.

The protective lens module 31, the focusing lens module 32 and the collimating lens module 34 are detachably mounted in the base 1 through a first mounting structure. This first mounting structure includes direction fixed part and with direction fixed part sliding clamping complex movable mounting spare 35, wherein, the direction fixed part setting is at the inner chamber of base 1 to carry out spacing fixed to movable mounting spare 35, this movable mounting spare 35 is used for the installation protective glass module that corresponds respectively, the optical lens of focusing mirror module and collimating mirror module, and optical lens installs in movable mounting spare 35.

Because movable mounting part 35 can freely take out or assemble from the direction fixed part, consequently when changing or maintaining optical lens, only need independent movable mounting part 35 that the optical module that will change or maintain corresponds to take out from the direction fixed part, take out the optical lens of installing in movable mounting part 35 again, carry out optical lens's change or maintain can, need not all take apart whole base 1 or all optical module and tear down, just can change or maintain optical lens, make the change of each optical module's optical lens maintain convenient and fast more, save maintenance time.

Combine fig. 3 and fig. 5 to show, it is concrete, the direction fixed part can be around the guide way that base 1 leads to the inner wall setting of light passageway, and movable mounting spare 35 can be the box body of middle part fretwork, and the part of box body fretwork forms logical light mouth 350, and optical lens installs in the box body, and the joint that the box body can move about forms drawer structure in the guide way.

In order to improve the leakproofness of movable mounting part 35 and the cooperation installation of direction fixed part, can set up the sealing ring between movable mounting part 35 and direction fixed part, for example, set up the sealing ring on the lateral wall of guide way, perhaps set up the sealing ring on two relative terminal surfaces of box body, the sealing ring can improve both complex compactness and leakproofness, with the gas leakage in preventing the gas transportation gas circuit system, lead to the cooling effect reduction of cooling gas circuit, also can prevent to enter into the smoke and dust of the inner chamber of base 1 simultaneously, granule such as splash contacts optical lens, cause optical lens to receive the pollution damage.

In addition, still be equipped with contact sensor on the direction fixed part of every optical module mounted position department for whether the response monitoring movable mounting spare assembles to target in place, whether this comes the inspection protective glass module, focus mirror module and collimating mirror module to assemble to target in place, has improved the accuracy of the position that the optical lens module was installed in the base, has avoided artificial assembly error. For example, the contact sensor may be installed at the bottom of the guide groove.

As shown in fig. 3, the first mounting structure further includes a first opening portion and a first cover 36 matching with the first opening portion, the first opening portion is disposed on the base 1 and is located above the mounting positions of the focusing lens module 32 and the protection lens module 31. When the first cover 36 is opened, the movable attachment member 35 and the guide fixing portion are exposed in the first opening portion, and the movable attachment member 35 can be taken out of the base 1 through the first opening portion or remounted in the base 1, so that the optical lens can be mounted, replaced, and maintained.

The movable mounting member 35 can be fixedly connected to the first cover 36 so that the first cover 36 can be removed together with the movable mounting member 35 when being opened, the first cover 36 is further provided with a release bolt 361, the release bolt 361 can fasten the first cover 36 to the base 1 to seal the first opening, and when the release bolt 361 is released, the release bolt 361 cannot be released from the first cover 36, at this time, the release bolt 361 can serve as a handle, and the first cover 36 can be removed from the first opening by holding the release bolt 361.

As shown in fig. 5, the movable attachment member 35 is provided with a cooling channel 351, the cooling channel 351 is disposed around the outer circumference of the optical lens, and the two ends of the cooling channel 351 are respectively provided with a butt hole 352, the butt holes 352 are used for communicating with a cooling air path, so that cooling air in the cooling air path flows through the cooling channel 351 to cool the optical lens.

Specifically, the cooling channel 351 may be disposed at a position near the extension of the case, and the shape of the cooling channel 351 may be U-shaped, rectangular, or semicircular, which can surround the outer circumference of the optical lens. The butt joint holes 352 penetrate through the end face of the box body to be communicated with the cooling channel 351, the two butt joint holes 352 at the two ends of the cooling channel 351 penetrate through the two end faces opposite to the box body to be communicated with the cooling channel 351, so that cooling gas can flow in from one end of the cooling channel 351 and flow out from the other end of the cooling channel 351, the effect of flowing around the optical lens is achieved through the cooling gas, the optical lens can be fully cooled, and the cooling efficiency of the cooling gas circuit is improved.

As shown in fig. 3, speculum module 33 is installed in the cavity that holds section 13 position of base 1 through second mounting structure detachable, second mounting structure is including setting up the first installation cavity 37 in holding section 13, this first installation cavity 37 includes speculum holding portion and the mirror motor holding portion that shakes, speculum holding portion and logical light passageway intercommunication, the mirror motor holding portion that shakes shape and the mirror motor appearance profile looks adaptation that shakes of speculum module, the speculum module is through shaking mirror motor and the mirror motor holding portion activity of shaking cup joint the cooperation through 33, the realization is connected with base 1's location installation and can dismantle.

The second mounting structure further includes a second opening 371 and a second cover 38 engaged with the second opening 371. The second opening 371 is disposed on the base 1 and located above the first mounting cavity 37, the second cover 38 is opened, the reflector module 33 is exposed in the second opening 371, and the reflector module 33 can be taken out of the base 1 through the second opening 371 or be mounted in the base 1 again, so as to facilitate the mounting, replacement and maintenance of the optical lens. The rear end of the galvanometer motor can be fixedly connected with the second cover 38, so that the galvanometer motor and the reflector module 33 can be taken out together when the second cover 38 is opened.

The second cover 38 is further provided with a release bolt, which can fasten the second cover 38 to the base 1 to seal the second opening 371, and when the release bolt is loosened, the release bolt will not be loosened from the second cover 38, and at this time, the release bolt can serve as a handle, and the second cover 38 can be taken out from the second opening 371 by holding the release bolt.

As shown in fig. 3, a third mounting structure is provided in the base 1, the laser output head assembly 4 is detachably mounted in the base 1 through the third mounting structure, and the third mounting structure includes a second mounting cavity 39 and a fixed cover plate 391 arranged in the second mounting cavity 39. The second mounting cavity 39 is internally provided with a mounting groove with a shape matched with the contour of the laser output head assembly 4, the side wall of the fixed cover plate 391 is provided with a fixed groove 392 matched with the contour of the laser output head assembly 4, the fixed cover plate 391 is fixedly connected with the base 1, and the laser output head assembly 4 is hermetically fixed in a cavity formed by the mounting groove and the fixed groove.

The third mounting structure further includes a third opening 393 and a third cover 394 matching with the third opening 393, and the third opening 393 is located above the second mounting cavity 39. After the third cover 394 is opened, the fixing cover 391 is exposed in the third opening 393, and the fixing cover 391 and the laser output head assembly 4 can be taken out of the base 1 through the third opening 393 or be remounted in the base 1, so that the laser output head assembly 4 can be conveniently mounted and maintained.

The laser output head assembly 4 includes a quartz end cap and an energy transmission optical fiber, one end of the energy transmission optical fiber is connected to the quartz end cap, and the other end of the energy transmission optical fiber extends out from the rear end of the base 1 and is connected to the laser 100. The quartz end cap and the energy transmission optical fiber are correspondingly arranged in the mounting groove, and the mounting groove can be used for positioning and fixing the quartz end cap and the energy transmission optical fiber due to the fact that the shape of the mounting groove is matched with the outline shapes of the quartz end cap and the energy transmission optical fiber, and then the mounting groove is covered by the fixing cover plate 391, so that the laser output head assembly 4 is hermetically fixed in the inner cavity of the base 1.

Of course, the side wall of the fixing cover plate 391 may also be provided with a fixing groove 392, and the shape of the fixing groove 392 matches with the outline shape of the quartz end cap and the energy transmission optical fiber, and the quartz end cap and the energy transmission optical fiber may also be positioned and fixed. And then the fixed cover plate 391 is fastened and connected with the base 1, and the laser output head assembly 4 is hermetically fixed in a cavity formed by the mounting groove and the fixing groove 392, so that a better sealing and fixing effect can be obtained, and the laser output head assembly 4 and the base 1 are integrally and integrally mounted.

Because the base is a holistic structure, optical lens subassembly and the equal integrated installation of laser output head subassembly are in the base, make laser welder realize with the integration of laser output head subassembly degree of depth, have realized the integrated design of integration, make laser welder and laser output head subassembly no longer be two independent components of carrying out the equipment when using, the benefit of design like this is:

the laser output head assembly is integrated and installed in the base in advance, the laser output head assembly belongs to a component of the laser welding gun, the laser output head assembly and the laser welding gun are integrated, assembly and output accuracy of the laser output head assembly are finished through one-time debugging during factory assembly, when the laser output head assembly is used, the laser is directly connected with the laser through the energy transmission optical fiber, and the laser can be used after being started. Compared with the traditional laser welding gun and the laser output head assembly which are independent components, the laser output head assembly and the laser welding gun do not need to be subjected to plug butt joint or flange connection every time before use, and the debugging time and the connection process consumed by connecting the laser output head assembly and the laser welding gun are saved.

And secondly, the base is an integrally designed part, so that the problems of tightness, dust prevention and leakage prevention in the base can be well solved, optical devices in the base are effectively protected, and the service life of the laser welding gun is prolonged.

Thirdly, the base is an integrated design part, so that the design difficulty of the laser welding gun can be reduced, the processing technology of the base is simplified, the processing precision of the base can be ensured, and the processing cost is reduced.

Fourthly, the whole laser welding gun is more compact and light in structure, is more easy to assemble and debug, saves the purchase and maintenance cost, and is convenient to carry, transport and move.

In the working process of the laser welding gun, on one hand, due to the long-time output of laser, the generated heat is easy to damage the optical lens due to the accumulation, and on the other hand, particulate matters such as smoke dust and splashes generated in the welding process are easy to enter from the internal channel of the spray pipe assembly 2 and contact with the optical lens, and the phenomenon that the optical lens is burnt and damaged can also be caused.

For this purpose, the gas delivery circuit system 5 is provided with a cooling circuit 51 and a protection circuit 52.

In the drawings of the embodiments of the present invention, the direction indicated by the illustrated arrows is the direction in which the gas flows in each gas path.

The cooling air path comprises a first air inlet section, an integral cooling part, an optical lens cooling part and a first output section.

Specifically, the first air inlet section is used for being connected with an external air source pipeline so as to connect air into the cooling air path. The first air inlet section can be an air pipe, the rear end of the air pipe is connected with a valve body of an external air source, the rear end of the first cooling section is provided with a first air inlet, a first through hole is formed in the side wall of the rear end of the base and penetrates through the side wall of the outer shell and the whole cooling part, and the first air inlet section is connected with the first through hole through a sealing adapter so as to achieve the purpose that the first air inlet section is connected with the first air inlet.

In the embodiment of the present invention, as shown in fig. 3 and 4, the base 1 includes an outer shell 101 and an inner shell 102, the outer shell 101 integrally covers the inner shell 102, and an inner space of the inner shell 101 forms an inner cavity of the base 1. A gap is provided between the outer casing 101 and the inner casing 102, so that an interlayer space 103 is formed between the outer casing 101 and the inner casing 102, and the interlayer space 103 entirely covers the outer periphery of the inner casing 102. The sandwiched space 103 forms an integral cooling part of the cooling gas path, and the cooling gas of the cooling gas path fills the entire sandwiched space 103, so that the cooling gas entirely covers the outer surface of the inner casing 102. The base 1 can be integrally formed from a complete blank by a shell extraction process.

Because a gap is formed between the outer shell 101 and the inner shell 102, an interlayer space 103 is formed between the outer shell 101 and the inner shell 102, the interlayer space 103 entirely covers the outer surface of the inner shell 102, and the interlayer space 103 is an integral cooling part. The cooling gas supplied from the first gas inlet section to the sandwiched space 103 fills the entire sandwiched space 103, so that the cooling gas is entirely coated on the outer surface of the inner casing 102.

The heat dissipated by the optical module (including the laser output head assembly, the collimating mirror module, the reflector module, the focusing mirror module and the protection mirror module) arranged in the inner shell 102 is transferred to the inner shell 102 in a heat conduction manner, so that the heat is taken away by the cooling gas coated on the outer surface of the inner shell 102, and the purpose of integral cooling is realized. Since the cooling gas entirely covers the outer surface of the inner housing 102, the cooling gas can be sufficiently contacted with the outer surface of the inner housing 102, and the cooling effect and the cooling efficiency of the entire cooling part are improved.

As shown in fig. 4, since the optical lenses of the protection lens module 31, the focusing lens module 32 and the collimating lens module are all mounted in the base 1 through the movable mounting member 35, the movable mounting member 35 is provided with cooling channels 351 arranged around the periphery of the optical lenses, the cooling channels 351 form optical lens cooling portions, and the two ends of the cooling channels 351 are respectively provided with the butt holes 352.

In the assembled state, the movable mounting part 35 blocks the interlayer space 103 of the entire cooling part, leaving only the docking hole 352 in communication with the interlayer space 103. When the cooling air in the integral cooling part flows through the movable mounting member 35, the cooling air flows into the cooling channel 351 through the butt hole 352 and then flows back into the integral cooling part from the other butt hole 352, so that the cooling air bypasses the periphery of the optical lens along the cooling channel 351 to take away the heat transferred to the movable mounting member 35 by the optical lens, and the optical lens is cooled again, and the purpose of sufficiently cooling the optical lens is achieved.

Referring to fig. 3 and 6, the first output section is disposed in front of the protective lens module 31, the first output section is provided with a gas wall generator 60, the gas wall generator 60 includes a plurality of gas outlet channels 61 arranged at the periphery of the light passage at intervals, the plurality of gas outlet channels 61 of each gas wall generator 60 are all disposed to be inclined from the periphery to the axis of the light passage and communicated with the light passage, the inclined angles of the gas outlet channels 61 of the same gas wall generator 60 are the same, and the inclined angle is defined as the included angle between the extension line of the axis of the gas outlet channel 61 and the axis of the light passage.

When cooling gas passes through first output section, a plurality of gas outlet channels 61 through gas wall generator 60 shunt and flow into the inner channel of nozzle subassembly 2, because every gas outlet channel 61 of same gas wall generator 60 is the slope setting and inclination is the same, the air current that flows out from every gas outlet channel 61 can assemble and intersect in same focus with same inclination, and form annular gas wall 10 in focus the place ahead, this gas wall 10 can block the smoke and dust that the inner channel from nozzle subassembly 2 got into, granule such as splash gets into the inner chamber of base 1, play good guard action to the protective glass of protective glass module 31.

One or more air wall generators can be arranged according to actual conditions, each air wall generator correspondingly generates one air wall, and the one or more air walls are generated by adjusting the inclination angles of the air outlet channels of different air wall generators. When the first output section is provided with a plurality of air wall generators, the plurality of air wall generators are arranged in an order in which the inner air wall generators are surrounded by the outer air wall generators.

The plurality of air wall generators can generate the same air wall and also can correspondingly generate a plurality of air walls, when the plurality of air wall generators generate the same air wall, the cooling air flowing out of the air outlet channels of the plurality of air wall generators is converged and intersected at the same focus, therefore, the inclination angles of the air outlet channels of the plurality of air wall generators are sequentially decreased from outside to inside, and the extension lines of the axes of the air outlet channels of the plurality of air wall generators are intersected at the same point. When a plurality of air wall generators correspondingly generate a plurality of air walls, the cooling air flowing out of the air outlet channels of different air wall generators is converged and intersected at different focuses. Therefore, the inclination angles of the air outlet channels of the air wall generators are equal or gradually increased from outside to inside, and the closer the air wall generator is to the axis of the light passing channel, the closer the focal point of the extension line of the air outlet channel axis is to the first output section.

For example, as shown in fig. 7 or fig. 8, the first output section is provided with two air wall generators, named as a first air wall generator 601 and a second air wall generator 602, respectively, and the first air wall generator 601 is wrapped outside the second air wall generator 602. At this time, if two air wall generators are to generate the same air wall, the inclination angle of the air outlet channel of the second air wall generator 602 is smaller than that of the air outlet channel of the first air wall generator 601, so that after the inclination angles of the air outlet channels of the first air wall generator and the second air wall generator are calculated, it is possible to realize that the extension lines of the air outlet channels of the first air wall generator 601 and the second air wall generator 602 intersect at the same focus, so that the air flows flowing out of the air outlet channels of the first air wall generator 601 and the second air wall generator 602 converge at the same focus, and form an air wall in front of the focus.

Accordingly, if it is desired to realize that two air wall generators generate two different air walls, the inclination angle of the outlet channel of the second air wall generator 602 is equal to or greater than the inclination angle of the outlet channel of the first air wall generator 601. Thus, after the inclination angles of the outlet channels of the first air wall generator 601 and the second air wall generator 602 are calculated, it is possible to achieve that the outlet channel axis extension lines of the first air wall generator 601 and the second air wall generator 602 intersect at different focuses, and the focus of the outlet channel axis extension line of the second air wall generator 602 is closer to the first output section than the focus of the outlet channel axis extension line of the first air wall generator 601, so that the air flows from the outlet channels of the first air wall generator 601 and the second air wall generator 602 converge at two different focuses and intersect, and respectively form an air wall in front of the two focuses.

The principle of generating different numbers of air walls by other numbers of air wall generators is the same as the principle of the above embodiment of generating air walls for two air wall generators, and the description thereof is omitted.

Specifically, as shown in fig. 3 and 6, an air wall ring 6 is disposed in front of the protective lens module 31, the air wall ring 6 is hermetically installed in the base 1, and the air wall ring 6 includes a body 62, a light hole 63, an air storage portion 64, and a plurality of air outlets 61 arranged at intervals around the axis of the light hole 63. The plurality of air outlet channels 61 are all arranged to incline from the periphery to the axis of the light through hole 63 and are communicated with the light through hole 63, and the inclination angles of the plurality of air outlet channels 61 are the same. The extension lines of the axes of the plurality of air outlet channels 61 intersect at the same point, and when the cooling gas in the cooling gas path flows out to the light through hole 63 through the air outlet channels 61, an air wall 10 is formed in the light through channel. The range of the inclination angles of the plurality of air outlet channels 61 is 20-80 degrees, for example, the inclination angles of the plurality of air outlet channels 61 are 30 degrees, 45 degrees or 60 degrees, and the inclination angles set by the inclination angles are complete in the form of the formed air wall, stable in air flow and less in turbulence.

The light through hole 63, the gas storage part 64 and the gas outlet channel 61 are all arranged on the body 62, the light through hole 63 is communicated with the light through channel of the base 1 and the internal channel of the gun barrel component 2, the gas wall ring 6 is hermetically arranged in the base 1, the light through hole 63 can be considered as a part of the light through channel, the gas storage part 64 is an annular groove formed in the side wall of the body 62 of the gas wall ring 6, the annular groove is hermetically connected with the inner wall of the base to form a gas storage chamber, and the gas outlet channel 61 of the gas wall generator 60 is communicated with the gas storage chamber and the light through hole 63.

Or, the air wall ring can be not provided with an annular groove, at the moment, the air wall ring is of a tubular structure, the outer diameter of the air wall ring is smaller than the inner diameter of the inner shell of the base, so that the air wall ring, the inner wall of the inner shell and the front end face of the gun barrel seat rear end face protective mirror module are sealed to form an air storage chamber, and the air storage chamber is communicated with the light through hole through an air outlet channel of the air wall generator.

The first output section comprises a second air inlet 1021, an air storage chamber and an air wall generator 60, wherein the second air inlet 1021 is communicated with the interlayer space 103 of the integral cooling part so as to introduce cooling air in the integral cooling part into the air storage chamber, and the cooling air flows out of the light through hole 63 through an air outlet channel 61 of the air wall generator 60 so as to form an air wall in the internal channel.

One or more air wall generators may be provided on the air wall ring 6 to create one or more air walls within the internal passageway, and the air outlet channels of the air wall generators may be angled holes provided in the bottom wall of the annular recess or angled holes provided in the end wall at the forward end of the annular recess. Alternatively, when the air wall ring is not provided with the annular groove, the air outlet channel of the air wall generator can be an inclined hole arranged on the side wall of the air wall ring. The arrangement of the inclined holes of the two air wall rings is the same as the arrangement of the air outlet channels of the air wall generator described in the above embodiments, and details thereof are omitted here.

In addition, the installation position department of each optical module still is equipped with temperature sensor, and temperature sensor is used for the operating temperature of real-time monitoring optical module, and when monitoring the temperature anomaly, in time feeds back unusual information, as unusual alarm signal to remind the operator to do and stop using.

Referring to fig. 3 and 6, the protection gas circuit 52 includes a second gas inlet section, a conveying section 521, and an input section, wherein the second gas inlet section is located at the front end of the protection gas circuit, the input section is located at the tail end of the protection gas circuit, and the second gas inlet section is used for being connected to an external gas source pipeline so as to introduce gas into the protection gas circuit. The second air inlet section can be an air pipe, the rear end of the air pipe is connected with a valve body of an external air source, the second air inlet section can share the same external air source with the first air inlet section, and the external air source is respectively connected with the first air inlet section and the second air inlet section through a three-way valve. The rear end of carrying the section is equipped with the third air inlet, and the front end of second air inlet section is connected with the third air inlet, and the third air inlet can be the second through-hole of seting up on the lateral wall of the shell body 101 rear end of base 1, and this second through-hole runs through the lateral wall of shell body 101 and carries section 521 intercommunication, and the second air inlet section is connected with the second through-hole through sealed adapter to realize the second air inlet section and carry the purpose that the section is connected.

The conveying section 521 may be an air conveying channel formed on the side wall of the outer casing 101 from the back to the front along the axis, or may be a section of pipeline disposed outside the side wall of the outer casing 101. The gas transmission channel is arranged on the side wall of the outer shell 101, so that the structure of a gas protection channel can be simplified, and the gas transmission channel has better gas tightness, so that the appearance of the laser welding gun is more attractive.

The input section has one end connected to the delivery section 521 and the other end communicating with the internal passage 24 of the nozzle assembly 2, and can introduce the shielding gas of the delivery section into the internal passage 24 of the nozzle assembly 2.

Specifically, the nozzle assembly 2 includes a nozzle 23, a barrel 22 and a barrel seat 21 coaxially connected in sequence, and the nozzle 23, the barrel 22 and the barrel seat 21 are all arranged in a hollow structure along an axis, and the hollow parts of the three are communicated to form an internal passage 24 penetrating through the whole nozzle assembly 2. The internal channel 24 can be used for the gas output by the gas conveying gas path system to pass through, and is sprayed out by the nozzle 23 to act on the welded object, meanwhile, the internal channel 24 can also be used for the laser beam output by the optical lens assembly to pass through, and is sprayed out by the nozzle to act on the welded object.

As shown in fig. 6 and 9, at least one air inlet channel 25 is disposed on the gun barrel seat 21, one end of the air inlet channel 25 is communicated with the conveying section 521, the other end of the air inlet channel 25 is communicated with the internal channel 24, and the input section includes the air inlet channel 25.

In order to effectively prevent particles such as smoke, splashes and the like outside the welding gun from entering the inner cavity of the base 1 along the inner channel to contaminate the optical lens and cause the lens to be burnt out, the air inlet channel 25 is obliquely arranged from the outer end of the gun barrel base 21 to the axis. When the shielding gas introduced from the conveying section 521 enters the internal channel 24 through the inclined inlet channel 25, the flow direction is changed by the inlet channel 25, so that the gas flow enters the internal channel 24 and then flows toward the nozzle 23 in a spiral manner.

Because protective gas is the spiral form and flows in interior passageway 24, the flow resistance that receives the inner wall to bring is less in interior passageway 24, make the air current no matter can both obtain comparatively unanimous flow velocity in interior passageway 24's edge or center department, guarantee that the whole constant speed of air current flows toward nozzle 23 department, thereby increased the smoke and dust, the resistance that granules such as splash removed along interior passageway 24 toward optical lens subassembly direction, effectively prevent the smoke and dust, granule such as splash and the lens contact of optical lens subassembly, in order to reach and prevent that optical lens from being contaminated, lead to the purpose that the lens is burnt out. In addition, the protective gas flowing through the nozzle 23 can prevent the high temperature at the nozzle 23 from continuously transmitting to the rear end of the nozzle assembly 2, and has a cooling effect on the nozzle assembly 2.

The inclined form of the air inlet 25 may be a plane inclination or a three-dimensional space inclination. When the inlet channel 25 is inclined in a plane, the axis of the inlet channel 25 is coplanar with the axis of the internal passage 24, and after the cooling gas flows into the internal passage 24 through the inlet channel 25, the cooling gas stirs the gas flow in the internal passage 24 by multiple impacts of the cooling gas on the inner wall of the internal passage 24, so that the gas flow gradually forms a spiral shape in the internal passage 24.

As shown in fig. 11, when the air intake duct 25 is inclined in a three-dimensional space, an XYZ three-dimensional space coordinate system is established with the center of the hollow portion of the barrel base 21 as a base point, in which the X axis coincides with the axis of the barrel base 21, so that the inclination angle of the air intake duct 25 can be expressed more intuitively. Specifically, the extension line of the axis of the air inlet channel 25, the XY plane, the YZ plane and the XZ plane are all provided with included angles which are acute angles, so that the protective gas flowing into the internal channel 24 from the air inlet channel 25 can be ensured to obtain an initial direction inclined in an XYZ three-dimensional space coordinate system, and when the protective gas enters the internal channel 24 from the air inlet channel 25, the protective gas has a component velocity in the tangential direction of the internal channel. The velocity division facilitates the formation of a helical pattern in the interior channel 24, so that the shielding gas can obtain a helical pattern after entering the interior channel 24, thereby achieving the purpose of forming a helical pattern flow in the interior channel 24.

When the air intake duct 25 is provided in plurality, the air intake ducts 25 are provided at intervals along the outer periphery of the barrel base 21. Each of the air-intake ducts 25 may be set to the same inclined posture, ensuring that the inclination angle of each air-intake duct 25 is the same, so that the air flowing from each air-intake duct 25 into the internal passage 24 obtains the same initial direction. The benefit that sets up like this is, can guarantee that the protective gas that flows into inner channel 24 from every intake duct 24 all forms the air current of a same spiral form, because the spiral form of every air current is the same, the step is unanimous, can not disturb each other, has guaranteed that the spiral air current of the interior flow of inner channel 24 is more stable even, does not have turbulent air current to disturb, thereby can obtain one to granule more effective prevention effect such as smoke and dust, splash.

When the inlet channel is plane-inclined, the angle between the axis of the inlet channel and the axis of the internal channel can be selected in the range of 20 ° to 80 °. For example, the angle between the axis of the inlet and the axis of the internal passage may be set to 30 °, 45 ° or 60 °, and the flow of the shielding gas into the internal passage using these angles as the initial direction may obtain a better spiral shape of the gas flow.

As shown in fig. 11, when the air inlet duct 25 is inclined in space, in the XYZ spatial coordinate system, the included angle between the air inlet duct 25 and the XY plane, the included angle between the air inlet duct 25 and the XZ plane, and the included angle between the air inlet duct 25 and the YZ plane are equal, and the included angle between the air inlet duct 25 and the three planes can be selected from the range of 20 ° to 80 °. For example, the angles between the inlet duct 25 and the XY plane, the XZ plane, and the YZ plane may be set to 30 °, 45 °, or 60 °, and the gas flowing into the internal passage 24 may be set to these angles as the initial direction, thereby obtaining a better spiral gas flow.

Of course, the air inlet channel on the gun barrel base 21 may also be set to be spiral shape around the axis of the internal channel, so that the shielding gas can obtain a pre-spiral shape in the air inlet channel, and after the shielding gas flows into the internal channel from the air inlet channel, the gas retains the initial shape of the pre-spiral shape in the air inlet channel, so that the shielding gas can more easily obtain the spiral airflow in the internal channel, thereby achieving the purpose of forming the spiral shape flow in the internal channel by the shielding gas.

Or, the air inlet channel on the gun barrel base can be also arranged in an arc shape (such as an arc or an elliptic arc), and when the protective gas enters the internal channel from the air inlet channel, the tangential direction of the internal channel has a component velocity which is beneficial to forming a spiral shape in the internal channel, so that the protective gas can obtain the spiral shape after entering the internal channel, and the purpose that the protective gas forms the spiral shape in the internal channel to flow is achieved.

Referring to fig. 9 and 10, the hollow portion of the barrel base 21 is configured as a first passage 210, the hollow portion of the barrel 22 is configured as a second passage 220, the hollow portion of the nozzle 23 is configured as a third passage 230, and the first passage 210, the second passage 220 and the third passage 230 are sequentially communicated to form a complete internal passage 24. The shielding gas in the shielding gas path flows into the first path 210 through the gas inlet 25, a spiral gas flow 20 starts to form in the first path 210, and the spiral gas flow 20 gradually flows through the second path 220 and the third path 230, and finally flows out from the third path 230.

The second passage 20 includes an acceleration chamber 221 and a buffer chamber 222, the acceleration chamber 221 is provided with a large end and a small end, the cross section of the acceleration chamber 221 is gradually reduced from the large end to the small end, the cross section of the buffer chamber 222 is larger than that of the small end of the acceleration chamber 221, and the cross section is defined as a section perpendicular to the axis of the acceleration chamber 221. The cross section of the accelerating cavity 221 may be circular, oval, or polygonal such as rectangular, square, trapezoid, etc. The cross-section of the buffer chamber 222 may be circular, oval, or polygonal such as rectangular, square, trapezoidal, etc.

For example, as shown in fig. 10, the second passage 220 includes an acceleration chamber 221 having a conical shape and a buffer chamber 222 having a cylindrical shape, a large end of the acceleration chamber 221 communicates with the first passage 210, a small end of the acceleration chamber 221 communicates with a rear end of the buffer chamber 222, a diameter of the buffer chamber 222 is larger than a diameter of the small end of the acceleration chamber 221, a front end of the buffer chamber 222 communicates with the third passage 230, and a diameter of the buffer chamber 222 is larger than a diameter of the third passage 230.

When the spiral airflow flows through the second passage 220, the spiral airflow firstly flows from the large end of the acceleration cavity 221 to the small end, and because the acceleration cavity 221 is conical, the spiral airflow is continuously accelerated in the flowing process of the small end, the speed is faster and faster, and the acceleration purpose is to effectively block particles such as smoke dust and splashes from entering the acceleration cavity 221. The accelerated spiral airflow finally flows into the buffer cavity 222 from the small end of the acceleration cavity 221, and since the diameter of the buffer cavity 222 is larger than that of the small end of the acceleration cavity 221, after the spiral airflow enters the buffer cavity 222, the flow speed is suddenly reduced, and the flow form is also changed, so that the form of the spiral airflow is eliminated in the buffer cavity 222, and the airflow gradually forms a straight flow form when flowing forwards in the buffer cavity 222. Then, the airflow flows forward to enter the third passage 230, and because the diameter of the third passage 230 is smaller than that of the buffer cavity 222, the airflow is accelerated again when flowing through the third passage 230, the linear flow of the airflow is further stabilized, and the linear airflow finally flows out of the nozzle 23 from the front end of the third passage 230 to act on the surface of the workpiece to be welded.

The gas flow rate of the internal channel 24 is 15-20L/min, and below this flow rate range, the gas flow rate in the internal channel 24 cannot meet the requirement, particles such as smoke dust and spatter cannot be better blocked, and particles such as smoke dust and spatter generated on the surface of a workpiece during welding cannot be quickly blown off, and above this flow rate range, the cost of the gas source will be increased.

The length of the buffer cavity 222 is 1.2-1.5 times of the diameter of the buffer cavity, so that a better air flow buffering effect can be achieved, the speed of the air flow in the buffer cavity 222 can be reduced within an ideal range required, a better effect of blocking particulate matters such as smoke dust and splashed materials can be obtained, and meanwhile, the spiral air flow form can be completely changed in the buffer cavity 222.

The taper of the accelerating cavity 221 is 3-5 degrees, and the length of the accelerating cavity 221 is 2.5-3 times of the length of the buffer cavity 222, so that a better accelerating effect can be obtained in a limited volume space structure, the airflow reaches a better speed range after being accelerated by the accelerating cavity 221, the airflow obtains a better blocking effect on particles such as smoke dust and splashes, the airflow obtains a better initial speed range after being decelerated by the buffer cavity 222, and the third passage 230 is favorable for accelerating the airflow again, and the particles such as smoke dust and splashes generated on the surface of a workpiece during welding can be blown off quickly after being sprayed out from the nozzle 23.

In summary, the air flow flowing into the internal channel 24 of the nozzle assembly 2 from the shielding gas channel first forms the spiral air flow 20 in the first passage 210 under the action of the inclined air inlet channel 25, the spiral air flow 20 enters the second passage 220, is accelerated by the acceleration cavity 221, and then enters the buffer cavity 222, the speed of the spiral air flow in the buffer cavity 222 is reduced, the flow form is also changed, and gradually goes forward to form a straight line shape, and then the air flow is accelerated again when flowing through the third passage 230 to form a stable straight line flowing air flow, and finally flows out of the nozzle from the front end of the third passage 230 to act on the surface of the workpiece to be welded.

Because the air current is the biggest from the speed of air current when nozzle 23 blowout because the air current is with higher speed through third passageway 230 back for the air current, the velocity of flow of air current is the fastest, makes the air current blow off particulate matters such as smoke and dust, splash that produce when welding fast, therefore most particulate matters such as smoke and dust, splash are blockked outside the nozzle, can't enter into in the third passageway 230, thereby form first protection. The remaining particulate matters such as smoke, splashes and the like enter the second passage 220, the speed of the particulate matters such as smoke, splashes and the like is synchronously reduced along with the airflow under the action of the buffer cavity 222, and the airflow speed at the small end of the acceleration cavity 221 is suddenly increased at the rear end of the buffer cavity 222, so that the remaining particulate matters such as smoke, splashes and the like are blocked in the buffer cavity 222 to form a second protection. Moreover, the spiral airflow in the first passage 210 and the accelerating cavity 221 can also effectively intrude particulate matters such as smoke dust and splashes into the rear end of the first passage 210 to form a third protection, and under the combined action of the three protections, the optical lenses of the optical lens assembly are protected layer by layer, so that the phenomenon that the optical lenses are polluted is effectively avoided, and the service life of the optical lenses is prolonged.

Although the spiral air flow can block the invasion of particles such as smoke dust and splashes in the internal channel, if the air flow is sprayed out of the nozzle in a spiral form and acts on the surface of the workpiece to be welded, due to the shape and the characteristics of the spiral air flow, the air flow acting on the surface of the workpiece to be welded can not completely or uniformly cover the processing area of the laser spot, so that the air can not be blocked from contacting the welding surface of the workpiece to be welded to a great extent, and the welding surface material is oxidized. Therefore, the spiral airflow must be changed to form a uniform linear airflow and then ejected from the nozzle, so as to ensure that the airflow acts on the surface of the workpiece to be welded and completely cover the processing area of the laser spot.

Therefore, it is necessary to provide the buffer chamber 222 at the front section of the second passage 220, because the spiral airflow entering the buffer chamber 222 changes the flow pattern of the airflow from the spiral pattern to a straight flow by the action of the buffer chamber 222. Then, the air flow is accelerated again when flowing through the third passage 230 to form a stable straight-line flowing air flow, so that the air flow is ejected from the nozzle 23 in a straight-line shape and acts on the surface of the workpiece to be welded, the straight-line air flow can completely and uniformly cover the processing area of the laser spot, oxygen in the air is effectively prevented from contacting the welding surface of the workpiece to be welded, and the phenomena of material surface oxidation and blackening caused by welding can be effectively avoided.

Or, the air inlet channel on the gun barrel seat is set to be a straight-through type, namely, the air inlet channel is set to be a straight-line type along the radial direction of the gun barrel seat, at the moment, when the protective gas input from the third conveying section flows into the internal channel through the air inlet channel, the air flow in a spiral form cannot be generated in the internal channel, but flows forwards in a straight-line form, so that the air flow is sprayed out from the nozzle in a straight-line form and acts on the surface of the workpiece to be welded, the air flow in the straight-line form can completely and uniformly cover the processing area of the laser light spot, the oxygen in the air is effectively prevented from contacting the welding surface of the workpiece to be welded, and the phenomena of oxidation and blackening of the material surface caused by welding and the like can be effectively avoided.

As shown in fig. 10, the nozzle 23, the barrel 22 and the barrel holder 21 of the nozzle assembly 2 are preferably separately connected to each other, so that the nozzle 23, the barrel 22 and the barrel holder 21 can be replaced and maintained independently, but they may be integrally provided. The gun tube base 21 includes a base 211 and a connecting tube 212, the first passage 210 axially penetrates through the base 211 and the connecting tube 212, and the air inlet 25 is disposed on the base 21 and is communicated with the first passage 210. The air inlet channel 25 may penetrate from the end surface of the seat body 21 to communicate with the first passage 210, so as to be connected with the protection air channel conveniently, and the layout structure of the protection air channel may be simplified. The air inlet passage may communicate with the first passage 210 through the side wall of the seat body 21. When there are a plurality of air inlets 25, the plurality of air inlets 25 are disposed around the periphery of the first passage 210, and the seat body 21 is further provided with a flange 26 for connecting with the base 1. The barrel 22 and the nozzle 23 are both tubular structures, and the tubular structures of the barrel 22 and the nozzle 23 respectively form a second passage 220 and a third passage 230. The barrel 22 and the connecting pipe 212 are connected by pipe threads, the nozzle 23 and the barrel 22 are also connected by pipe threads, and if necessary, a sealing ring is arranged at the threaded joint to improve the tightness of the connection between the two.

In addition, in some occasions, when the width of the welding seam of the workpiece to be welded is large, welding wires are required to be added as materials for filling the welding seam to complete welding, and at this time, the wire feeding assembly 10 needs to be additionally arranged on the laser welding gun to achieve the purpose of automatically feeding the welding wires, so that the wire feeding accuracy and the welding efficiency are improved.

Specifically, as shown in fig. 12, the wire feeding assembly 10 includes a wire nozzle 101, a butt joint pipe 102 and a wire feeding pipe 103, which are connected in sequence, the butt joint pipe 102 is detachably connected to the nozzle assembly 2 through a fixing and adjusting device 104, and the wire feeding pipe 103 is detachably connected to the rear end of the outer housing through a connecting piece 105, so as to form two fixed connection positions, and reliably connect the wire feeding assembly 10 and the laser welding gun as a whole.

Wherein, the wire outlet of the wire nozzle 101 is aligned with the outlet of the nozzle 23 of the nozzle component 2, so as to realize that the welding wire sent out from the wire nozzle 101 is overlapped with the center of the laser output by the nozzle 23, thereby ensuring that the welding wire is completely positioned in the laser heating area, leading the heating high temperature to fully melt the welding wire, realizing filler welding and improving the welding quality.

Fixed adjusting device 104 includes fixing base 1041 and angle adjusting part 1042, fixing base 1041 cup joints on spout subassembly 2, angle adjusting part 1042 is connected and is sent a butt joint pipe 102 of subassembly 10, it is concrete, angle adjusting part 1042 is including adjusting seat and locking shaft, the one end of adjusting the seat is passed through the locking shaft and is connected with fixing base 1041 rotation, the other end of adjusting the seat is fixed with the pipe box of being connected, adjust the seat and rotate around the locking shaft through stirring, can adjust the every single move angle of silk mouth, when guaranteeing to send a subassembly 10 to match different spout subassemblies 2, the export of the nozzle 23 of spout subassembly 2 can both be aimed at to the silk mouth of silk mouth 101.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The gas conveying gas path system for the laser processing equipment is characterized by comprising a cooling gas path and a protection gas path, wherein the cooling gas path integrally wraps the periphery of the part, except for the spray pipe assembly, of the laser processing equipment, and the front end of the protection gas path is communicated with the inside of the spray pipe assembly.

2. The gas delivery gas circuit system for a laser processing apparatus according to claim 1, wherein the cooling gas circuit includes an interlayer space that entirely covers a periphery of a portion of the laser processing apparatus other than the nozzle assembly, and the cooling gas of the cooling gas circuit fills the entire interlayer space.

3. The gas delivery gas circuit system for laser processing equipment of claim 2, wherein the cooling gas circuit further comprises a cooling channel disposed around the periphery of the optical lens of the laser processing equipment, the cooling channel being in communication with the interlayer space.

4. The gas delivery circuit system for a laser machining apparatus of claim 3, wherein the cooling channel is U-shaped, rectangular, or semi-circular in shape.

5. The gas conveying gas path system for the laser processing equipment as claimed in claim 1, wherein the cooling gas path is further provided with a gas wall generator, the gas wall generator comprises a plurality of gas outlet channels which are arranged at intervals on the periphery of the light passing channel of the laser processing equipment, the plurality of gas outlet channels are all arranged to be inclined from the periphery to the axis of the light passing channel and are communicated with the light passing channel, and the inclination angles of the gas outlet channels of the gas wall generator are the same.

6. The gas transmission path system of claim 1, wherein the shielding gas path comprises at least one gas inlet channel communicated with the internal channel of the nozzle assembly, and when shielding gas in the shielding gas path flows into the nozzle assembly through the gas inlet channel, a component velocity is obtained in a tangential direction of the internal channel under the action of the gas inlet channel, so that the shielding gas generates a spiral gas flow in the nozzle assembly.

7. The gas delivery gas circuit system for laser processing equipment as claimed in claim 6, wherein the gas inlet channel is arranged obliquely; or the air inlet channel is spirally arranged around the axis of the internal channel; or the air inlet channel is arranged in an arc shape around the axis of the internal channel.