CN216355290U - Heat dissipation system and portable laser welding equipment - Google Patents

Abstract

The utility model relates to the technical field of laser, and provides a heat dissipation system for cooling a Laser Diode (LD) in a direct semiconductor laser (DDL), which comprises: inflation board, base plate heat sink, temperature-uniforming plate, the inflation board includes: compared with the prior art, the heat dissipation system provided by the utility model cancels a water cooling system with large volume and large weight, adopts three-level heat conduction and temperature equalization to enlarge the heat dissipation area, ensures good heat dissipation, and is also beneficial to the whole volume of a portable laser.

Description

Heat dissipation system and portable laser welding equipment

Technical Field

The embodiment of the utility model relates to the technical field of laser, in particular to a heat dissipation system and portable laser welding equipment.

Background

Along with the improvement of panel processing on welding flexibility and precision processing requirement, traditional argon arc welding, two guarantor welding and other ordinary welding machines have not can not satisfy the demand of production completely, and laser welding can be better this problem of solution, and platform type laser welding equipment is heavy and huge very difficult nimble application again, so on laser welding's basis, hand-held type laser welding takes place when answering. The welding defects of undercut, incomplete penetration, dense air holes, cracks and the like in the traditional welding process are overcome, the welding seam after the handheld laser welding is smooth and beautiful, the welding speed is high, the subsequent polishing process is reduced, and the time and the cost are saved; the welding gun of the handheld laser welding machine replaces the traditional fixed light path, is more flexible and convenient, realizes remote laser welding and overcomes the limitation of the stroke space of the workbench; the handheld laser welding has no fine welding table, low material consumption, low equipment deployment and maintenance cost; the electro-optical conversion efficiency is high, the energy consumption is low, the operation is simple and easy to learn, a professional welder master is not needed, common workers can go on duty after short training, and the processing cost can be greatly saved after long-term use.

Despite the above advantages and features, the handheld laser welding has been widely used, but the following problems still exist in the existing handheld laser welding equipment: 1) the volume and the weight are large, and are more than several times of the weight and the volume of the traditional electric arc welding machine and the argon arc welding machine, so that the transportation is difficult, the movement is troublesome, and the occupied space is large; 2) the investment is large at one time, the cost is high, and particularly the application range of the high-cost high-efficiency energy-saving water-saving agent is limited by the high cost; 3) along with the requirement on high power, the heat dissipation of a laser light source becomes more and more difficult, and the main measure adopted at present is to dissipate heat by water cooling, so that the size and the weight are large, the application range of the laser light source is limited, the maintenance difficulty is increased, and the use flexibility is reduced; 4) the fiber laser is adopted as a light source, so that the cost is difficult to control, the power consumption is high, and the welding of the thin plate is easy to deform.

SUMMERY OF THE UTILITY MODEL

Based on this, the embodiments of the present invention provide a heat dissipation system and a portable laser welding device, so as to solve the problems of a handheld laser welding device, such as large volume, poor heat dissipation effect, high cost, and high power consumption.

In a first aspect, an embodiment of the present invention provides a heat dissipation system for cooling a Laser Diode (LD) in a direct semiconductor laser (DDL), including: the device comprises an expansion plate, a substrate heat sink, a temperature-equalizing plate, a first fan set and a second fan set; the inflation panel includes: the heat dissipation structure comprises a plurality of heat dissipation fins arranged at intervals, a first base plate and a second base plate which are arranged oppositely, wherein the heat dissipation fins are vertically arranged between the first base plate and the second base plate and are adjacent to each other, a heat dissipation channel is formed between the heat dissipation fins, a first fan set and a second fan set are arranged on two opposite sides of the heat dissipation channel, and the first base plate deviates from one side of each heat dissipation fin is sequentially stacked on the base plate heat sink, the temperature equalization plate and the LD.

In a second aspect, an embodiment of the present invention further provides a portable laser welding apparatus, including:

a chassis;

the optical path system comprises a mould stripper, a photoelectric detector, a control panel and a Laser Diode (LD), wherein the mould stripper, the photoelectric detector, the control panel and the Laser Diode (LD) are arranged in the chassis, the output end of the LD is connected with the input end of the mould stripper, the photoelectric detector is fixed on the surface of the mould stripper and is used for detecting scattered laser stripped by the mould stripper, and the control panel is respectively connected with the LD and the photoelectric detector and is used for controlling the LD to emit laser and collecting photoelectric signals detected by the photoelectric detector;

the heat dissipation system of claim 1; and

the transmission sleeve is arranged outside the case, and the handheld laser welding output head is connected with the transmission sleeve.

The utility model has the beneficial effects that:

the present invention provides a heat dissipation system for cooling a Laser Diode (LD) in a direct semiconductor laser (DDL), comprising: the device comprises an expansion plate, a substrate heat sink, a temperature-equalizing plate, a first fan set and a second fan set; the inflation panel includes: the heat dissipation structure comprises a plurality of heat dissipation fins arranged at intervals, a first base plate and a second base plate which are arranged oppositely, wherein the heat dissipation fins are vertically arranged between the first base plate and the second base plate and are adjacent to each other, a heat dissipation channel is formed between the heat dissipation fins, a first fan set and a second fan set are arranged on two opposite sides of the heat dissipation channel, and the first base plate deviates from one side of each heat dissipation fin is sequentially stacked on the base plate heat sink, the temperature equalization plate and the LD. Compared with the prior art, the embodiment of the utility model cancels a water cooling system with large volume and heavy weight, enlarges the heat dissipation area by utilizing three-level heat conduction and temperature equalization, ensures good heat dissipation effect of the LD, and simultaneously increases the first fan group and the second fan group which are oppositely arranged to act on the blowing-up plate, thereby being beneficial to blowing out the heat generated by the LD.

The present invention provides a portable laser welding apparatus, comprising: the optical path system comprises a mould stripper, a photoelectric detector, a control panel and a Laser Diode (LD), wherein the mould stripper, the photoelectric detector, the control panel and the Laser Diode (LD) are arranged in the machine box, the output end of the LD is connected with the input end of the mould stripper, the photoelectric detector is fixed on the surface of the mould stripper and used for detecting scattered laser stripped by the mould stripper, and the control panel is respectively connected with the LD and the photoelectric detector and used for controlling the LD to emit laser and collecting photoelectric signals detected by the photoelectric detector; and the transmission sleeve is arranged outside the case, and the handheld laser welding output head is connected with the transmission sleeve. Compared with the prior art, (1) the embodiment of the utility model adopts DDL as the light source of the laser welding equipment, and the single high-power LD as the laser generator, so that the utility model has the advantages of high integration level, simplified optical path system, high electro-optical efficiency, contribution to reducing the volume and weight, very compact integral structure, reduced energy consumption, low cost and suitability for high-efficiency welding application of thin plates; (2) the photoelectric detector is directly arranged on the surface of the mold stripping device, so that the working state of the LD can be effectively and quickly monitored, and the safety of the portable laser welding equipment is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a heat dissipation system for cooling a Laser Diode (LD) according to an embodiment of the present invention;

FIG. 2 is an exploded view of a blow-up plate provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a portable laser welding apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic illustration of a construction of a handheld laser welding output head according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fiber optic splice assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an optical lens assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the exit nozzle in an embodiment of the utility model;

FIG. 8 is a schematic cross-sectional view of a shield gas nozzle in the exit nozzle of FIG. 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on"/"disposed on" another element, it can be directly on the other element or intervening elements may also be present. In addition, in this specification, the words "first" and "second" do not limit data and execution order, but distinguish substantially the same item or similar items in function and action.

Specifically, the present embodiment is further explained below with reference to the drawings.

In a laser, it is important to heat dissipation of a laser light source, and in this embodiment, a heat dissipation system is provided, referring to fig. 1, for cooling a Laser Diode (LD)210 in a direct semiconductor laser (DDL), including: the heat sink comprises an expansion plate 201, a substrate heat sink 202 and a temperature-equalizing plate 203, wherein the substrate heat sink 202, the temperature-equalizing plate 203 and the LD210 are sequentially stacked on the expansion plate 201. Further, referring to fig. 2, the heat dissipation system further includes: the heat dissipation device comprises a first fan set 204 and a second fan set 205, wherein the first fan set 204 and the second fan set 205 are arranged on two opposite sides of the heat dissipation channel. Specifically, the inflation panel 201 includes: the heat sink comprises a plurality of heat dissipation fins 206 arranged at intervals, a first base plate 207 and a second base plate 208 arranged oppositely, wherein the heat dissipation fins 206 are perpendicular to the space between the first base plate 207 and the second base plate 208, and the base plate heat sink 202, the temperature equalization plate 203 and the LD210 are sequentially stacked on one side of the first base plate 207, which is far away from the heat dissipation fins 206.

It can be understood that the heat generated by the LD210 during operation is first expanded and homogenized by the vapor chamber 203 to reduce its heat dissipation density; then, the substrate heat sink 202 supporting the temperature equalizing plate 203 accelerates heat transfer and transfers the heat to the expansion plate 201, and the first substrate 207 in the expansion plate 201 guides the heat to the heat dissipation fins 206, so that the heat dissipation contact area is increased, and meanwhile, the first fan set 204 and the second fan set 205 arranged on the opposite sides of the heat dissipation channel quickly discharge the generated heat through driving air, so that the heat dissipation effect of the heat dissipation system is improved.

In this embodiment, the expansion plate 201 is a metal with high thermal conductivity, such as copper, aluminum alloy, or copper-aluminum alloy, and the substrate heat sink 202 is a metal with high thermal conductivity, such as copper, aluminum alloy, or copper-aluminum alloy. The temperature equalizing plate 203 is a temperature equalizing plate commonly used in the prior art. The expansion plate 201 and the substrate heat sink 202 are fixed by screws, the substrate heat sink 202 and the temperature-equalizing plate 203 are fixed by screws, and similarly, the temperature-equalizing plate 203 and the LD210 are fixed by screws.

Referring to fig. 3, the present embodiment further provides a portable laser welding apparatus, including a chassis 226, an optical path system, the heat dissipation system of the present embodiment, a transmission sleeve 218 disposed outside the chassis, and a handheld laser welding output head 100 connected to the transmission sleeve, where the optical path system includes: the laser module stripping device comprises a module stripping device 211, a photoelectric detector 214, a control panel 215 and a Laser Diode (LD)210 which are arranged in a case 216, wherein the output power of the LD210 is 1000-1500W, the core diameter of an output optical fiber is 150-300 mu m, the output end of the LD210 is connected with the input end of the module stripping device 211, the photoelectric detector 214 is fixed on the surface of the module stripping device 211 and used for detecting scattered laser stripped by the module stripping device 211, and the distance between the photoelectric detector 214 and the module stripping device 211 is 1-2 mm. The control board 215 is respectively connected to the LD210 and the photodetector 214, and is configured to control the LD210 to emit laser light and collect a photoelectric signal detected by the photodetector 214. When the optical path system is burned or the devices are broken, the photodetector 214 cannot measure the scattered light filtered by the stripper 211, that is, the photoelectric signal detected by the photodetector 214 is 0, and further, the control board 215 sends an instruction to turn off the output semiconductor laser of the LD210, so as to protect the LD 210.

Further, with continuing reference to fig. 3, the portable laser welding apparatus further includes: the indicating light source and the beam combiner 213 are arranged in the case 226, the output end of the indicating light source is connected with the input end of the beam combiner 213, the output end of the LD210 is connected with the input end of the beam combiner 213, and the output end of the beam combiner 213 is connected with the input end of the mode stripping device 211. In this embodiment, the indication light source may be any one of a red light diode, a blue light diode, a violet light diode, and a green light diode, and specifically, the indication light source is the red light diode 212 in this embodiment. The output ends of the red diode 212 and the LD210 are both connected to the beam combiner 213, the red diode 212 can generate red indicating laser with a wavelength of 650nm, and the beam combiner 213 combines the semiconductor laser generated by the LD210 and the red indicating laser generated by the red diode 212 into one beam, which is output by an output optical fiber of the beam combiner 213.

Further, with reference to fig. 3, the portable laser welding apparatus of the present embodiment further includes: the power supply interface 29 is connected with the main power supply 216, the main power supply 216 is respectively connected with the LD210 and the light-on power supply 217, the switch power supply 217 is connected with the control board 215, the control board 215 is connected with the adapter plate 218, and the adapter plate 218 is connected with the photodetector 214. Specifically, an externally input ac 220V commercial power enters the main power supply 216 through the power interface 219, and the main power supply 216 converts the ac commercial power into a dc power to be supplied to the DDL210, the switching power supply 217, the first fan set 204 and the second fan set 205, so as to ensure that the DDL, the switching power supply 217, the first fan set 204 and the second fan set 205 can normally supply power; the switching power supply 217 further steps down the electric energy input by the main power supply 216 to the control board 215, so as to provide a suitable electric energy for the adapter board 218, and the adapter board 218 further steps down the electric energy to provide a suitable electric energy for the red light diode 212, so as to ensure that the red light diode 212 can normally work.

In addition, in order to stabilize the semiconductor laser output by the LD210, a fixed support plate 220 is disposed in the chassis, and the beam combiner 213, the photodetector 214, the stripper 211, the red diode 212, and the interposer 218 are all fixed on the fixed support plate 220.

Further, in this embodiment, the case 226 is provided with a handle 221 for holding and controlling the case 226, and the bottom of the case is provided with 4 identical casters 222, so as to ensure that the entire laser welding apparatus is easy to push and labor-saving when moving.

Further, referring to fig. 4, the handheld laser welding output head 100 is composed of an optical fiber connector assembly 10, an optical lens assembly 80, an exit nozzle 60 and an air channel assembly 70. The optical lens assembly 80 may be one of the collimating lens assembly 20, the mirror assembly 30, the focusing lens assembly 40, and the protective lens assembly 50, or any combination of two or more thereof. The air passage assembly 70 includes a main air pipe joint 71, a main air pipe 72, a three-way air pipe joint 73, at least one first air-dividing pipe 74 and at least one second air-dividing pipe 75.

With continued reference to fig. 4, the optical fiber connector assembly 90 includes an optical fiber connector cooling block 11 and an optical fiber connector 12 secured in the optical fiber connector cooling block 11. In this embodiment, the optical fiber connector assembly 10 is an end cap assembly, the optical fiber connector cooling block 11 is an end cap cooling block, and the optical fiber connector 12 is a laser output end cap. The optical lens assembly 80 includes an optical lens cooling block 81 and an optical lens 82 fixed in the optical lens cooling block 81; in the present embodiment, the collimator lens assembly 20 includes a collimator lens cooling block 21 and a collimator lens 22 fixed in the collimator lens cooling block 21, the focusing lens assembly 40 includes a focusing lens cooling block 41 and a focusing lens 42 fixed in the focusing lens cooling block 41, and the protective lens assembly 50 includes a protective lens cooling block 51 and a protective lens 52 fixed in the protective lens cooling block 51. The mirror assembly 30 includes a galvanometer motor 31 and a swingable mirror 32 fixed to the galvanometer motor 31. The exit nozzle 60 includes a shield gas nozzle 61 and a welding gun tube 62.

As shown in fig. 4, the handheld laser welding output head 100 includes an output head main control board 101, a mirror vibrating motor 31 is connected with the output head main control board 101 through a mirror vibrating motor connecting wire 33, the mirror vibrating motor 31 can swing one-dimensionally within a range of 0-2 °, a swinging reflector 32 connected above the mirror vibrating motor is driven to swing the reflected laser beam one-dimensionally, and finally the focused laser beam acts on the material to be welded and also swings one-dimensionally, and the swing of the laser beam can increase the welding width to enable the welding with larger gap to smoothly complete the improvement of the welding quality.

Further, the handheld laser welding output head 100 further comprises a light emitting button 102 and an operation display panel 103, the light emitting button 102 and the output head main control board 101 are connected through a light emitting button connecting line 1021 to control whether light is emitted or not, the light emitting button 102 can trigger a light emitting instruction manually, and light is emitted when the button is pressed and is released, so that light is not emitted. The operation display panel 103 is connected with the output head main control board 101 through an operation display panel connecting wire 1031, the operation display panel 103 is provided with a rotary operation button 1032, a status indicator light 1033 and a display screen 1034, the rotary operation button 1032 is used for performing rotary operation to control parameters such as laser power, swing amplitude and swing frequency, the status indicator light 1033 is used for indicating whether the current working state is working or failure to remind an operator of paying attention, the display screen 1034 displays current welding parameters, status information, failure codes and the like, so that the operator can conveniently control the working state of the handheld laser welding output head 100, and the operation display panel 103 is fixedly arranged above the galvanometer motor 31 to facilitate observation and operation of the operator.

The handheld laser welding output head 100 further comprises a main control line connector 104, the main control line connector 104 is connected with the output head main control board 101 through a main control line 1041, and is in interconnection communication with an external controller through the main control line connector 104, so that the external controller can control the whole welding output head.

Further, the portable laser welding apparatus includes: the protection air interface 223 is arranged on the case, the air delivery pipe 224, the protection air electric switch 225 and the transmission sleeve fixed joint 227 are arranged in the case, the control panel 215 is connected with the protection air electric switch 225, the protection air interface 223 is sequentially connected with the protection air electric switch 225 and the transmission sleeve fixed joint 227, the transmission sleeve 228 is connected with the transmission sleeve fixed joint 227, and the optical fiber armor cable 107, the main air pipe 72 and the main control wire 1041 are sealed in the transmission sleeve 228, so that the transmission sleeve 228 is formed into a whole to prevent pipelines from being scattered and knotted, and the pipelines can be effectively protected from being damaged; the optical fiber armor 107, the main air pipe 72, the main control wire 1041 and the transmission packing pipe 108 are the same in length and can be selectively configured between 5 meters and 15 meters, and the longer length can ensure that laser is transmitted to a longer distance for welding. The optical fiber armor 107 is fixedly mounted on the cabinet 226 through the transmission sleeve fixing joint 227, and the work of guiding laser into the welding output head is completed.

The protective gas input from the outside firstly enters a protective gas electric switch 225 through a protective gas interface 223, then is guided into a gas path pipe through a gas transmission pipe 224, and finally outputs and acts a laser beam from the laser welding output head 100 to a workpiece to be welded, a protective atmosphere is formed on the workpiece to protect a welding pool from being oxidized and well dissipate heat, and the protective gas which can be input comprises common welding protective gas such as nitrogen, argon, helium and the like; the shielding gas electric switch 225 is directly connected with the control board 215, and can be controlled by the control board 215 to be turned on and off, so that the shielding gas is ensured to be synchronous with the laser output to avoid waste of the shielding gas, and the switch is turned on only when the LD210 outputs laser for welding processing.

Specifically, the mode stripper 211 is connected to the optical fiber cable 107, the laser output from the mode stripper 211 passes through the transmission sleeve fixing joint 227 and the optical fiber cable 107, then continues to be transmitted to the optical fiber joint 12, and is output by the optical fiber joint 12 as a spatially divergent laser beam, and the divergent laser beam is collimated by the collimating mirror 22 and then becomes a parallel laser beam to be transmitted to the swingable mirror 32; after being reflected by the swingable mirror 32, the transmission direction is changed into a reflected laser beam, and the reflected laser beam is transmitted to the focusing mirror 42 to form a converging beam, and finally is output from the welding gun tube 62 through the protective mirror 52 and the protective gas nozzle 61 to act on the material to be welded.

The main gas pipe joint 71 is connected with the main gas pipe 72, external gas enters the main gas pipe 72 through the main gas pipe joint 71, the gas is transmitted to the three-way gas pipe joint 73 along the main gas pipe 72, is divided into two parts, and is simultaneously transmitted to the first gas branch pipe 74 and the second gas branch pipe 75 respectively.

The first gas distributing pipe 74 carries external gas to enter the optical fiber connector cooling block 11, the collimating mirror cooling block 21, the focusing mirror cooling block 41, the protective mirror cooling block 51 and the protective gas nozzle 61 in sequence, and finally the external gas is transmitted to the welding gun pipe 62 to be discharged; the second branch gas pipe 75 is directly connected to the shielding gas nozzle 61, and transmits a high-speed gas flow in the external gas to the shielding gas nozzle 61, and the shielding gas nozzle 61 is connected to the welding gun pipe 62, and finally discharges the gas flow from the welding gun pipe 62.

The gas in the first gas distribution pipe 74 sequentially enters the optical fiber connector cooling block 11, the collimating mirror cooling block 21, the focusing mirror cooling block 41 and the protective mirror cooling block 51, heat generated by interaction of laser and the optical fiber connector 12 (laser output end cap) and optical lenses (collimating mirror 22, focusing mirror 42 and protective mirror 52) is sequentially conducted, taken away and discharged, and the temperature of the lenses can be effectively reduced to ensure that the lenses reliably work for a long time. The gas in the second gas distribution pipe 75 directly enters the protective gas nozzle 61, the gas resistance is relatively small, the gas flow is relatively large, the smoke generated by welding can be well inhibited by more gas flows, the safety of the protective lens 52 is guaranteed, the service life of the protective lens is prolonged, and the welding gun pipe 62 can be fully cooled, the temperature of the welding gun pipe 62 can be reduced, and the reliability is improved; the gas in the first gas distributing pipe 74 and the gas in the second gas distributing pipe 75 are finally converged in the welding gun pipe 62, and are jointly ejected from the welding gun pipe 62 to act on the welding workpiece for blowing away smoke generated by the workpiece to be welded, so that the welding seam can be effectively protected, the welding quality is improved, the heat affected zone is reduced, and the welding deformation is reduced.

The optical fiber connector cooling block 11 is configured as shown in fig. 5, and the optical fiber connector cooling block 11 is provided with a first air inlet 111 and a first air outlet 112 at opposite ends thereof, respectively. The optical fiber connector 12 is fixed inside the optical fiber connector cooling block 11, and the optical fiber connector 12 is connected with the transmission optical fiber 13. The optical fiber connector cooling block 11 includes a first outer cavity 113 and a first inner housing 114, the first inner housing 114 surrounds the optical fiber connector 12, a spiral cooling air passage 115 is formed between the first outer cavity 113 and the first inner housing 114, and the first outer cavity 113 hermetically surrounds the spiral cooling air passage 115. A helical cooling air duct 115 partially or fully surrounds the fiber optic connector 12 and partially surrounds the transmission optical fiber 13. The first air inlet 111 is connected with the first air distributing pipe 74 to introduce the external air into the spiral cooling air channel 115 and output the external air through the first air outlet 112, so that the air flow sealed in the first outer cavity 113 continuously rotates and surrounds to increase the contact cooling area. The collimator lens assembly 20, the focusing lens assembly 30 and the protective lens assembly 50 are all constructed as the optical lens assembly 80 in fig. 6, and the optical lens assembly 80 includes an optical lens cooling block 81 and an optical lens 82 fixed in the optical lens cooling block 81. The optical lens 82 can be a collimating lens 22, a focusing lens 42 and a protective lens 52, the optical lens cooling block 81 can be a collimating lens cooling block 21, a focusing lens cooling block 41 or a protective lens cooling block 51, and the basic structures are as shown in the figure, the optical lens 82 can be a collimating lens 22, a focusing lens 42 or a protective lens 52, and the airflow in the first air dividing pipe 74 is guided into the lens cooling block air inlet 83 so as to enter the U-shaped cooling air passage 84; the U-shaped cooling air channel 84 surrounds the optical lens 82 and rotates and twists to increase the heat conducting contact area, so that the heat generated by the optical lens 82 is taken away and finally conducted to the next lens cooling block through the lens cooling block air outlet 85; the optical lens cooling blocks 81 each include a lens inner housing 86 and a lens outer cavity 87, with a U-shaped cooling channel 84 formed between the lens inner housing 86 and the lens outer cavity 87. A lens inner housing 86 surrounds the optical lens 82 and a lens outer cavity 86 sealingly surrounds the U-shaped cooling airway 84.

In this embodiment, the collimator assembly 20 includes a collimator cooling block 21 and a collimator 22 fixed in the collimator cooling block 21, a first U-shaped cooling air channel is disposed inside the collimator cooling block 21, the first U-shaped cooling channel surrounds the collimator 22 and rotates and twists, a second air inlet and a second air outlet are respectively disposed at two opposite ends of the collimator cooling block 21, and air output from the first air outlet 112 flows into the second air inlet through a first air distribution pipe 74 and is transmitted to the first U-shaped cooling air channel to be output through the second air outlet; the focusing mirror assembly 40 comprises a focusing mirror cooling block 41 and a focusing mirror 42 fixed in the focusing mirror cooling block 41, a second U-shaped cooling air passage is arranged inside the focusing mirror cooling block 41, the second U-shaped cooling air passage surrounds the focusing mirror 42 and is twisted in a rotating manner, a third air inlet and a third air outlet are respectively arranged at two opposite ends of the focusing mirror cooling block 41, and air flow output by the second air outlet flows into the third air inlet through the first air distributing pipe 74 and is transmitted to the second U-shaped cooling air passage to be output through the third air outlet; protective glass subassembly 50 includes protective glass cooling block 51 and is fixed in protective glass 52 in the protective glass cooling block 51, protective glass cooling block 51 is inside to be equipped with third U type cooling air flue, third U type cooling channel encircles protective glass 52 and rotatory distortion, the relative both ends of protective glass cooling block 51 are equipped with fourth air inlet and fourth gas outlet respectively, the air current of third gas outlet output passes through first gas distribution pipe 74 flows in the fourth air inlet and transmits extremely third U type cooling air flue is exported through the fourth gas outlet.

The structure and operation of the exit nozzle 60 is shown in fig. 7 and 8, and the exit nozzle 60 includes: protection gas nozzle 61 and the welding gun pipe 62 that links to each other with protection gas nozzle 61, welding gun pipe 62 are toper welding gun pipe, and welding gun pipe 62 can be as an organic whole structure with protection gas nozzle 61 in other embodiments, and protective glass cooling block 51 is connected with protection gas nozzle 61 and welding gun pipe 62 in proper order, and welding gun pipe 62 assembles on protection gas nozzle 61, and protection gas nozzle 61 includes: a nozzle body 611 having a light passing hole 612 formed through the center thereof for passing a laser beam therethrough; an annular flow channel 613 is surrounded around the periphery of the light passing hole 612, the first gas distribution pipe 74 and the second gas distribution pipe 75 are connected to the annular flow channel 613, gas flows of gas in the first gas distribution pipe 74 and gas in the second gas distribution pipe 75 are both led into the annular flow channel 613, and a plurality of gas flow jet holes 614 are distributed on the annular flow channel 613. External gas enters the welding gun barrel 12 through a plurality of gas flow orifices 614; both the laser beam and the outside air pass through the welding gun barrel 62. The light-passing hole 612 can ensure that the laser light smoothly passes through the shielding gas nozzle 61 without being blocked. 6-12 jet holes 614 are distributed on the annular flow channel 613, the jet holes 614 are uniformly distributed on the annular flow channel 613, and the diameter of the jet holes 614 is 0.5-3 mm. The flow of external gas creates a helical reflected gas flow within the welding gun barrel 62.

The nozzle body 611 side wall includes a tapered side wall 615 and a cylindrical side wall 616 connected to the tapered side wall 615. The included angle between the air flow spray holes 614 and the cylindrical side wall 616 is 30-60 degrees. The smaller jet holes 614 can effectively compress air flow to increase the flow speed of the air flow, and the air flow jetted by the jet holes 614 arranged at a certain included angle can form multiple reflections on the inner wall of the welding gun barrel 62, and finally form a layer of blocking air wall in the area close to the lower part of the protective air nozzle 61. The blocking air wall can well prevent and block splashing, smoke dust, impurities and the like generated by welding from splashing upwards to be stained on the protective glasses 52, so that the protective glasses 52 are well protected from being polluted and damaged, the service life of the protective glasses 52 is greatly prolonged, and the replacement frequency of the protective glasses is reduced. A laser with a hand-held welding function has the hand-held laser welding output head 100 as described above.

The laser and the handheld laser welding output head are integrally connected, so that unnecessary structural parts are reduced, and the weight of a handheld welding head is greatly reduced; the full air cooling design cancels the complex water channel design, which is beneficial to reducing the weight of the handheld welding head. The double-air-passage design has the advantages that cooling and protection are both correct, and waste is reduced by effectively utilizing gas; the spiral air passage design can effectively ensure the safety of the protective glasses and improve the heat dissipation efficiency and reliability; an operation button and a display screen are arranged, so that welding processing parameters can be conveniently operated and controlled on the handheld welding head; unique air flow nozzle design can form the separation air wall, and the pollution of welding smoke and dust is avoided to effectual protection lens, improves the life-span reduction consumptive material change frequency of lens.

In contrast to the prior art, the present embodiment provides a heat dissipation system for cooling a Laser Diode (LD) in a direct semiconductor laser (DDL), comprising: the blowing plate 201, the substrate heat sink 202, the temperature-equalizing plate 203, the first fan group 204 and the second fan group 205; the inflation panel 201 includes: a plurality of heat dissipation fins 206, first base plate 207 and second base plate 208 that set up at interval, relative setting, just heat dissipation fin 206 is located perpendicularly between first base plate 207 and the second base plate 208, and is adjacent form heat dissipation channel between the heat dissipation fin 206, first fan group 204 with second fan group 205 set up in heat dissipation channel's relative both sides, one side that first base plate 207 deviates from heat dissipation fin stacks in proper order base plate heat sink 202, temperature-uniforming plate 203, LD 210. Compared with the prior art, the embodiment of the utility model cancels a water cooling system with large volume and heavy weight, enlarges the heat dissipation area by utilizing three-level heat conduction and temperature equalization, ensures good heat dissipation effect of the LD210, and simultaneously increases the first fan group 204 and the second fan group 205 which are oppositely arranged to act on the blowing expansion plate 201, thereby being beneficial to blowing out the heat generated by the LD 210.

The present embodiment provides a portable laser welding apparatus, including: the optical path system comprises a mold stripper 211, a photodetector 214, a control board 215 and a Laser Diode (LD) which are arranged in the chassis, wherein an output end of the LD210 is connected with an input end of the mold stripper 211, the photodetector 214 is fixed on the surface of the mold stripper 211 and is used for detecting scattered laser stripped by the mold stripper 211, and the control board 215 is respectively connected with the LD210 and the photodetector 214 and is used for controlling the LD210 to emit laser and collecting a photoelectric signal detected by the photodetector 214; and a transmission sleeve arranged outside the case and a handheld laser welding output head 100 connected with the transmission sleeve. Compared with the prior art, (1) the embodiment of the utility model adopts DDL as the light source of the laser welding equipment, and the single high-power LD as the laser generator, so that the utility model has the advantages of high integration level, simplified optical path system, high electro-optical efficiency, contribution to reducing the volume and weight, very compact integral structure, reduced energy consumption, low cost and suitability for high-efficiency welding application of thin plates; (2) the photoelectric detector is directly arranged on the surface of the mold stripping device 211, so that the working state of the LD can be effectively and quickly monitored, and the safety of the portable laser welding equipment is improved.

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 utility model, 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 utility model 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 (10)

1. A heat dissipation system for cooling a Laser Diode (LD) in a direct semiconductor laser (DDL), comprising: the device comprises an expansion plate, a substrate heat sink, a temperature-equalizing plate, a first fan set and a second fan set; the inflation panel includes: the heat dissipation structure comprises a plurality of heat dissipation fins arranged at intervals, a first base plate and a second base plate which are arranged oppositely, wherein the heat dissipation fins are vertically arranged between the first base plate and the second base plate and are adjacent to each other, a heat dissipation channel is formed between the heat dissipation fins, a first fan set and a second fan set are arranged on two opposite sides of the heat dissipation channel, and the first base plate deviates from one side of each heat dissipation fin is sequentially stacked on the base plate heat sink, the temperature equalization plate and the LD.

2. A portable laser welding apparatus, comprising:

a chassis;

the optical path system comprises a mould stripper, a photoelectric detector, a control panel and a Laser Diode (LD), wherein the mould stripper, the photoelectric detector, the control panel and the Laser Diode (LD) are arranged in the chassis, the output end of the LD is connected with the input end of the mould stripper, the photoelectric detector is fixed on the surface of the mould stripper and is used for detecting scattered laser stripped by the mould stripper, and the control panel is respectively connected with the LD and the photoelectric detector and is used for controlling the LD to emit laser and collecting photoelectric signals detected by the photoelectric detector;

the heat dissipation system of claim 1; and

the transmission sleeve is arranged outside the case, and the handheld laser welding output head is connected with the transmission sleeve.

3. The portable laser welding apparatus according to claim 2, wherein the optical path system further includes: the output end of the indicating light source is connected with the input end of the beam combiner, the output end of the LD is connected with the input end of the beam combiner, and the output end of the beam combiner is connected with the input end of the stripping device.

4. The portable laser welding apparatus as defined in claim 3, wherein the indicating light source is one of a red diode, a blue diode, a violet diode, and a green diode.

5. The portable laser welding apparatus as recited in claim 3, further comprising: the power interface is connected with the main power supply, the main power supply is respectively connected with the LD and the switch power supply, the switch power supply is connected with the control panel, the control panel is connected with the adapter plate, and the adapter plate is connected with the photoelectric detector.

6. The portable laser welding apparatus of claim 5, wherein a fixed support plate is disposed in the housing, and the beam combiner, the photodetector, the stripper, the indicator light source, and the adapter plate are fixed to the fixed support plate.

7. The portable laser welding apparatus of claim 2, wherein a handle is provided on the case for holding the case; and the bottom of the case is provided with trundles.

8. The portable laser welding apparatus of claim 2, wherein the handheld laser welding output head further comprises a light emitting button, an operation display panel, and a main control panel, the main control panel is connected to the control panel, the light emitting button and the main control panel are connected to control whether light is emitted, the operation display panel is connected to the main control panel, the operation display panel is provided with a rotary operation button, a status indicator lamp and a display screen, the rotary operation button performs a rotary operation to control the laser power, the swing amplitude and the swing frequency, the status indicator lamp is used to indicate the current working status, and the display screen displays the current welding parameters, status information and fault codes.

9. The portable laser welding apparatus of claim 2 wherein the handheld laser weld output head comprises a fiber optic connector assembly, an optical lens assembly, an exit nozzle, and a gas path assembly; the air path assembly comprises at least one air pipe and an emergent spray pipe, and external air sequentially enters the optical fiber connector assembly and the optical lens assembly through the air pipe and then is gathered and sprayed out of the emergent spray pipe, so that the optical fiber connector assembly, the optical lens assembly and the emergent spray pipe are cooled.

10. The portable laser welding apparatus of claim 9, wherein the fiber splice assembly is integrally designed with the laser weld output head.

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