Multi-beam laser deposition printing head device

Abstract

The utility model relates to a multi-beam laser deposition printing head device. The multi-beam laser deposition printing head device comprises a printing head base, a plurality of shaping optical lens sets, a plurality of mounting bases, a plurality of optical fiber connectors, a plurality of laser position adjusting jackscrews, a plurality of printing head guide nozzles, a feeding pipe and a feeding guide nozzle. By screwing one or more laser position adjusting jackscrews on the mounting seats, the laser position adjusting jackscrews move back and forth in respective laser position adjusting screw holes, the positions of the optical fiber connectors mounted on the mounting seats can be adjusted, and the positions of the optical fiber connectors mounted on the mounting seats can be adjusted by adjusting the positions of the optical fiber connectors on one or more mounting seats. Focusing light spots of multiple light beams are aligned with the feeding position of a coaxial material, and a complex adjusting mechanism does not need to be additionally designed in the whole process for secondary adjustment of the light spot position. Therefore, the multi-beam laser deposition printing head device has the advantages of being simple in structure, small in size and low in manufacturing cost while ensuring that the multi-beam focusing light spots can be accurately aligned with the feeding position of the coaxial material.

Description

Technical Field

[0001] The utility model relates to the technical field of laser deposition printing equipment, in particular to a multi-beam laser deposition printing head device. Background Art

[0002] Additive manufacturing technology is a digital forming process that directly forms parts by layer-by-layer accumulation. Compared with traditional subtractive manufacturing methods, additive manufacturing can respond quickly to demands and has the advantages of single-piece, small-batch, customized, and rapid manufacturing. Currently, in the field of metal 3D printing technology, in the directional energy deposition forming method, laser powder feeding and fused filament additive manufacturing technology has been widely applied in various industrial fields due to its strong material adaptability and the fact that the printing size range is basically not limited.

[0003] In order to achieve an accurate and efficient deposition process, multiple beams of light can be focused so that they converge to form a relatively large spot, enabling it to completely enclose the coaxial material therein, providing an idea and method for improving the overall performance of the laser coaxial deposition printing head technology. The positional relationship between the converged spot and the feeding position of the coaxial material not only affects whether the metal material can be fed into the molten pool for full melting, but also directly affects whether the material melting and solidification process is continuous and stable.

[0004] In the prior art, a complex adjustment mechanism is designed to perform secondary pose adjustment on multiple laser beams installed on the printing head base to adjust the relationship between the multi-beam focused spot and the feeding position of the coaxial material. This adjustment method requires operators to have relatively high optical professional knowledge, and the multi-beam coaxial deposition printing head needs to be equipped with a complex precision mechanical adjustment mechanism, increasing the engineering complexity and bringing a relatively high usage cost to engineering applications. Summary of the Utility Model

[0005] Based on this, it is necessary to provide a multi-beam laser deposition printing head device that can align the multi-beam focused spot with the feeding position of the coaxial material without additionally configuring a complex adjustment mechanism to perform secondary adjustment on the position of the multi-beam focused spot, thereby achieving a simplified structure and reduced manufacturing cost.

[0006] A multi-beam laser deposition printing head device includes:

[0007] A printing head base having opposite top and bottom ends; the printing head base has a feeding channel passing through the end faces of the top end and the bottom end; the printing head base has a plurality of laser channels arranged at intervals around the feeding channel; the distance between one end of the laser channel located at the top end and the feeding channel is greater than the distance between one end of the laser channel located at the bottom end and the feeding channel;

[0008] Multiple integer-shaped optical lens groups are respectively and correspondingly installed in multiple laser channels to collimate and focus the laser beams in the laser channels;

[0009] Multiple mounting seats are respectively and correspondingly installed at the openings at the tops of multiple laser channels; the mounting seats are formed with mounting holes communicating with the corresponding laser channels; a plurality of laser position adjustment screw holes are radially and spaced apart along the circumferential direction of the mounting holes on the side walls of the mounting seats and communicate with the mounting holes;

[0010] Multiple fiber optic connectors are respectively and correspondingly installed in multiple mounting holes;

[0011] Laser position adjustment set screws screwed into each laser position adjustment screw hole, one end extends into the corresponding mounting hole and abuts against the side wall of the corresponding fiber optic connector;

[0012] Multiple print head nozzles are respectively and correspondingly installed at one ends of multiple laser channels at the bottom ends;

[0013] A feed pipe is installed in the feed channel;

[0014] A feed nozzle is installed at one end of the feed pipe at the bottom end.

[0015] In one embodiment, a plurality of feed position adjustment screw holes communicating with the outside are formed at intervals along the circumferential direction on the inner wall of the feed channel; a feed position adjustment set screw is screwed into each feed position adjustment screw hole; one end of the feed position adjustment set screw extends into the feed channel and abuts against the side wall of the feed pipe.

[0016] In one embodiment, cooling channels are formed at positions close to the inner walls of each laser channel inside the print head base; the plurality of cooling channels are sequentially communicated; a cooling inlet and a cooling outlet communicating with both ends of the sequentially communicated plurality of cooling channels are formed on the outer wall of the print head base.

[0017] In one embodiment, the cooling channels are arranged in a spiral shape along the central axis direction of the corresponding laser channels.

[0018] In one embodiment, an auxiliary feeding unit is further included; the auxiliary feeding unit includes a housing, a feeding nozzle, a material receiving nozzle, a wire feeding wheel set and a wire feeding driving member; the housing is installed at the top end; the feeding nozzle and the material receiving nozzle are coaxially arranged along the direction from the top end to the bottom end, and are respectively installed at one end of the housing far away from the print head base and one end close to the print head base; the material receiving nozzle is communicated with one end of the feeding pipe at the top end; the wire feeding wheel set includes a driving wheel and a driven wheel which are arranged at intervals along a direction perpendicular to the direction from the top end to the bottom end; both the driving wheel and the driven wheel are located between the feeding nozzle and the material receiving nozzle; the wire feeding driving member is in transmission connection with the driving wheel.

[0019] In one embodiment, both the driving wheel and the driven wheel are gears with arc tooth profiles.

[0020] In one embodiment, there are two wire feeding wheel sets; the two wire feeding wheel sets are arranged at intervals along the direction from the top end to the bottom end; the wire feeding driving member is respectively in transmission connection with the two driving wheels and is used for driving the two driving wheels to rotate synchronously.

[0021] In one embodiment, the auxiliary feeding unit further includes a material passing nozzle detachably installed in the housing; the material passing nozzle is located between the two wire feeding wheel sets and is coaxially arranged with the material receiving nozzle and the feeding nozzle respectively.

[0022] In one embodiment, the auxiliary feeding unit further includes a powder feeding pipe; two ends of the powder feeding pipe are respectively detachably connected with one end of the feeding nozzle close to the print head base and one end of the material receiving nozzle facing the feeding nozzle; there is a gap between the powder feeding pipe and the driving wheel.

[0023] In one embodiment, a protective gas port for conveying inert gas into the print head nozzle is formed on the side wall of each print head nozzle.

[0024] When the above multi-beam laser deposition print head device is in use, the laser generator is connected to the fiber optic connector through an optical fiber, so that the laser beam generated by the laser generator can be transmitted into the laser channel, and after being adjusted, matched and corrected by the shaping optical lens group in the laser channel, it is emitted from the print head nozzle to the print substrate to form a print spot. In practical applications, by using the pre-designed and adjusted shaping optical lens group, the focal length and spot size of the multi-beam laser focusing can be determined. Further, by turning one or several laser position adjusting set screws on the mounting base, it can move back and forth in its respective laser position adjusting screw hole to adjust the position of the optical fiber connector on the mounting base. By adjusting the positions of the optical fiber connectors on one or several mounting bases, the focusing spot of the multi-beam can be aligned with the feeding position of the coaxial material, realizing plug-and-play. Therefore, for the above multi-beam laser deposition print head device, by simply turning the laser position adjusting set screws, it can ensure that the focusing spot of the multi-beam is aligned with the feeding position of the coaxial material. There is no need to additionally design a complex adjustment mechanism for secondary adjustment of the spot position during the whole process. Therefore, while ensuring that the focusing spot of the multi-beam is accurately aligned with the feeding position of the coaxial material, the above multi-beam laser deposition print head device has a relatively simple structure, a smaller volume and a lower manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a schematic structural diagram of a multi-beam laser deposition print head device in a preferred embodiment of the present invention;

[0026] Figure 2 is Figure 1 a cross-sectional view of the multi-beam laser deposition print head device shown;

[0027] Figure 3 is Figure 1 a schematic structural diagram of the auxiliary feeding unit for wire feeding in the multi-beam laser deposition print head device shown;

[0028] Figure 4 is Figure 1 a schematic structural diagram of the auxiliary feeding unit for powder feeding in the multi-beam laser deposition print head device shown.

[0029] Description of the reference numerals in the specific embodiments: 100, multi-beam laser deposition printing head device; 110, printing head base; 111, top end; 112, bottom end; 113, feeding channel; 114, laser channel; 115, cooling channel; 116, cooling inlet; 117, cooling outlet; 120, shaping optical lens group; 130, mounting base; 140, fiber optic connector; 150, laser position adjusting setscrew; 160, printing head nozzle; 170, feeding pipe; 180, feeding nozzle; 190, feeding position adjusting setscrew; 201, auxiliary feeding unit; 2011, housing; 2012, feeding nozzle; 2013, material receiving nozzle; 2014, wire feeding wheel set; 20141, driving wheel; 20142, driven wheel; 2015, wire feeding driving member; 2016, material passing nozzle; 2017, powder feeding pipe; 10, printing substrate. Specific embodiments

[0030] For ease of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure of the present invention is more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can also be intermediate elements. It can also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements or there can also be one or more intermediate elements.

[0033] In the case of using "including", "having", and "comprising" described herein, unless a clear limiting term is used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be understood as having a quantity of one.

[0034] Please refer to Figure 1 and Figure 2, in the preferred embodiment of the present utility model, the multi-beam laser deposition printing head device 100 includes a printing head base 110, a plurality of shaping optical lens groups 120, a plurality of mounting seats 130, a plurality of fiber optic connectors 140, a plurality of laser position adjusting set screws 150, a plurality of printing head nozzles 160, a feed pipe 170 and a feed nozzle 180.

[0035] The printing head base 110 has opposite top end 111 and bottom end 112. The printing head base 110 has a feed channel 113 that penetrates the end faces of the top end 111 and the bottom end 112. The printing head base 110 has a plurality of laser channels 114 spaced around the feed channel 113. The distance between one end of the laser channel 114 located at the top end 111 and the feed channel 113 is greater than the distance between one end of the laser channel 114 located at the bottom end 112 and the feed channel 113. When the multi-beam deposition printing device including the multi-beam laser deposition printing head device 100 is located on a horizontal plane, the top end 111 and the bottom end 112 are respectively the upper end and the lower end of the printing head base 110. At this time, the laser channel 114 is a vertically arranged straight channel that penetrates the printing head base 110, and the laser channel 114 is an inclined channel with one end of the lower edge inclined towards the feed channel 113.

[0036] A plurality of shaping optical lens groups 120 are respectively installed in a one-to-one correspondence in a plurality of laser channels 114 to collimate and focus the laser beams in the laser channels 114.

[0037] A plurality of mounting seats 130 are respectively installed at the openings of a plurality of laser channels 114 located at the top end 111. The mounting seat 130 is formed with a mounting hole (not labeled in the figure) communicating with the corresponding laser channel 114. A plurality of laser position adjusting screw holes (not labeled in the figure) that are radially distributed and communicate with the mounting hole are spaced along the circumferential direction of the side wall of the mounting seat 130.

[0038] A plurality of fiber optic connectors 140 are respectively installed in a one-to-one correspondence in a plurality of mounting holes.

[0039] A plurality of laser position adjusting set screws 150 are respectively screwed into a plurality of laser position adjusting screw holes. One end of the laser position adjusting set screw 150 extends into the corresponding mounting hole and abuts against the side wall of the corresponding fiber optic connector 140.

[0040] A plurality of printing head nozzles 160 are respectively installed at one end of a plurality of laser channels 114 located at the bottom end 112.

[0041] The feed pipe 170 is installed in the feed channel 113. The feed nozzle 180 is installed at one end of the feed pipe 170 located at the bottom end 112.

[0042] During use, the feeding device in the multi-beam deposition printing equipment transports metal materials such as metal powder and metal wire through the feeding pipe 170 and the feeding nozzle 180 to the printing substrate 10. The optical fiber connector 140 is connected to the laser generator through an optical fiber, so that the laser beam generated by the laser generator can be transmitted into the laser channel 114. The shaping optical lens group 120 calibrates and focuses the laser beam in the laser channel 114 to realize the adjustment and matching correction of the multi-beam. Then, the laser beam is emitted from the printing head nozzle 160 onto the metal material on the printing substrate 10 to form a printing spot.

[0043] In practical applications, by using the pre-designed and adjusted shaping optical lens group 120, the focal length and spot size of the multi-beam laser focusing can be determined. Further, by turning one or several laser position adjusting set screws 150 on the mounting base 130, it can move back and forth in its respective laser position adjusting screw hole to adjust the position of the optical fiber connector 140 mounted on the mounting base 130. By adjusting the positions of the optical fiber connectors 140 on one or several mounting bases 130, the focusing spot of the multi-beam can be aligned with the feeding position of the coaxial material to achieve plug-and-play. Therefore, for the above multi-beam laser deposition printing head device 100, by simply turning the laser position adjusting set screw 150, it can ensure that the focusing spot of the multi-beam is aligned with the feeding position of the coaxial material. The whole process does not require an additional complex adjustment mechanism to perform secondary adjustment of the spot position. Therefore, while ensuring that the focusing spot of the multi-beam is accurately aligned with the feeding position of the coaxial material, the above multi-beam laser deposition printing head device 100 has a relatively simple structure, a smaller volume, and a lower manufacturing cost.

[0044] In some embodiments, a plurality of feeding position adjusting screw holes (not labeled in the figure) communicating with the outside are formed at intervals along the circumferential direction of the inner wall of the feeding channel 113. Each feeding position adjusting screw hole is screwed with a feeding position adjusting set screw. One end of the feeding position adjusting set screw extends into the feeding channel 113 and abuts against the side wall of the feeding pipe 170.

[0045] In practical applications, according to the adjustment direction required for the feeding position of the metal material, one or several feeding position adjusting set screws can also be selected to be turned to adjust the position of the feeding pipe 170 in the feeding channel 113, so that the feeding position of the coaxial material and the focusing spot of the multi-beam can be aligned, and the alignment work between the focusing spot of the multi-beam and the feeding position of the coaxial material can be realized without changing the shape and position of the focusing spot of the multi-beam.

[0046] In some embodiments, cooling channels 115 are formed inside the print head base 110 at positions close to the inner walls of each laser channel 114. The plurality of cooling channels 115 are connected in sequence. A cooling inlet 116 and a cooling outlet 117 are formed on the outer wall of the print head base 110, which are connected to the two ends of the plurality of cooling channels 115 connected in sequence respectively.

[0047] In the multi-beam deposition printing device, the cooling inlet 116 is connected to a cold source, so that the cooling medium of the cold source flows through each cooling channel 115 in sequence through the cooling inlet 116 and flows out from the cooling outlet 117. This can not only take away the heat generated by the energy loss of the laser beam at the shaping optical lens group 120, but also timely take away the radiant heat of the molten pool on the print head base 110, prevent thermal damage from occurring, and there is no need to configure an additional cooling system, achieving multi-purpose in one, and realizing the integration of the multi-beam laser deposition print head device 100.

[0048] Further, in some embodiments, the cooling channels 115 are arranged in a spiral shape along the central axis direction of the corresponding laser channels 114 to extend the length of each cooling channel 115 and increase the contact area between the inner wall of each cooling channel 115 and the cooling medium in the cooling channel 115, so as to further improve the cooling effect on the shaping optical lens group 120 and the print head base 110, further reduce the probability of thermal damage to the shaping optical lens group 120, and make the multi-beam laser deposition print head device 100 have a longer service life.

[0049] Please refer to Figure 3 as well. In some embodiments, the multi-beam laser deposition print head device 100 further includes an auxiliary feeding unit 201. The auxiliary feeding unit 201 includes a housing 2011, a feeding nozzle 2012, a receiving nozzle 2013, a wire feeding wheel set 2014 and a wire feeding driving member 2015. The housing 2011 is installed on the top end 111. The feeding nozzle 2012 and the receiving nozzle 2013 are coaxially arranged along the direction from the top end 111 to the bottom end 112, and are respectively installed at one end of the housing 2011 away from the print head base 110 and at one end of the housing 2011 close to the print head base 110. The receiving nozzle 2013 is communicated with one end of the feeding pipe 170 at the top end 111. The wire feeding wheel set 2014 includes a driving wheel 20141 and a driven wheel 20142 which are arranged at intervals along a direction perpendicular to the direction from the top end 111 to the bottom end 112. Both the driving wheel 20141 and the driven wheel 20142 are located between the feeding nozzle 2012 and the receiving nozzle 2013. The wire feeding driving member 2015 is in transmission connection with the driving wheel 20141.

[0050] When the feeding device conveys the metal wire into the feeding tube 170 through the auxiliary feeding unit 201, the metal wire is fed in from the feeding guide nozzle 180, passes through the gap between the driving wheel 20141 and the driven wheel 20142, and then enters the feeding tube 170 through the receiving guide nozzle 2013. At this time, the driving wheel 20141 can be driven to rotate by the wire feeding drive 2015 to cooperate with the driven wheel 20142 to provide the metal wire with a conveying force pointing from the top end 111 to the bottom end 112, so as to ensure that the metal wire can be fed into the molten pool at a preset speed.

[0051] Furthermore, in some embodiments, the driving wheel 20141 and the driven wheel 20142 are gears with circular arc teeth. The circular arc teeth can increase the contact area and friction coefficient between the metal wire and the driving wheel 20141 and the driven wheel 20142, thereby improving the reliability of the metal wire in the feeding tube 170.

[0052] Of course, in other embodiments, the driving wheel 20141 and the driven wheel 20142 may also be smooth pressure wheels, or pressure wheels with anti-slip grooves on the pressure roller surface.

[0053] Further, in some embodiments, there are two wire feeding wheel assemblies 2014. The two wire feeding wheel assemblies 2014 are spaced apart in a direction from the top end 111 to the bottom end 112. The wire feeding drive member 2015 is respectively connected to the two driving wheels 20141 for driving the two driving wheels 20141 to rotate synchronously.

[0054] In this way, the two wire feeding wheel groups 2014 provide two forces for the movement of the metal wire and provide two-point support for the metal wire, and guide the moving direction of the metal wire to ensure that the metal wire coming out of the feed guide nozzle 2012 can accurately enter the receiving guide nozzle 2013, further improving the transportation reliability of the metal wire.

[0055] Furthermore, in some embodiments, the auxiliary feeding unit 201 further includes a feed guide nozzle 2016 detachably mounted in the housing 2011. The feed guide nozzle 2016 is located between the two wire feeding wheel assemblies 2014 and is coaxially arranged with the receiving guide nozzle 2013 and the feeding guide nozzle 2012. The feed guide nozzle 2016 is arranged to support and guide the position of the metal wire between the two wire feeding wheel assemblies 2014, to avoid bending and deformation of the metal wire, and to further improve the reliability of the conveying of the metal wire.

[0056] Please also read Figure 4, Further, in some embodiments, the auxiliary feeding unit 201 further includes a powder feeding pipe 2017. Two ends of the powder feeding pipe 2017 are detachably connected to one end of the feeding nozzle 2012 close to the print head base 110 and one end of the material receiving nozzle 2013 facing the feeding nozzle 180 respectively. There is a gap between the powder feeding pipe 2017 and the driving wheel 20141.

[0057] When it is necessary to switch the feeding form from wire feeding to powder feeding, the powder feeding pipe 2017 can be connected between the feeding nozzle 2012 and the material receiving nozzle 2013 to ensure that the metal powder in the material receiving nozzle 2013 can smoothly enter the feeding pipe 170 through the material receiving nozzle 2013. At the same time, the powder feeding pipe 2017 and the driving wheel 20141 are arranged at intervals to ensure that the driving wheel 20141 will not drive the feeding pipe 170 to move when rotating, ensuring the safety and reliability of the powder feeding work.

[0058] When the auxiliary feeding unit 201 includes a material passing nozzle 2016, the material passing nozzle 2016 can be removed first, and then the powder feeding pipe 2017 can be installed between the feeding nozzle 2012 and the material receiving nozzle 2013, so as to realize the switching of the feeding form from wire feeding to powder feeding.

[0059] Therefore, in practical applications, by disassembling and assembling the powder feeding pipe 2017, the feeding form can be arbitrarily switched between powder feeding and wire feeding without replacing the dedicated powder feeding system pipeline and wire feeding system, and the operation is simple and convenient.

[0060] In some embodiments, a protective gas port (not shown in the figure) for conveying inert gas into each print head nozzle 160 is provided on the side wall of each print head nozzle 160. In the multi-beam deposition printing device, by connecting each protective gas port to the gas source of the inert gas, the inert gas can be conveyed into the corresponding print nozzle through the protective gas port, so as to establish a local atmosphere protection for the printing molten pool area and prevent the smoke and dust generated by the molten pool from polluting the shaping optical lens group 120.

[0061] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0062] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims. The present utility model relates to a multi-beam laser deposition printing head device. The multi-beam laser deposition printing head device includes a printing head base, a plurality of shaping optical lens groups, a plurality of mounting seats, a plurality of fiber optic connectors, a plurality of laser position adjusting set screws, a plurality of printing head nozzles, a feed pipe, and a feed nozzle. By turning one or several laser position adjusting set screws on the mounting seat to move them back and forth in their respective laser position adjusting screw holes, the position of the fiber optic connector mounted on the mounting seat can be adjusted. By adjusting the positions of the fiber optic connectors on one or several mounting seats, the focused light spots of multiple beams are aligned with the feeding position of the coaxial material. There is no need to additionally design a complex adjustment mechanism for secondary adjustment of the light spot position during the whole process. Therefore, while ensuring that the focused light spots of multiple beams can be accurately aligned with the feeding position of the coaxial material, the multi-beam laser deposition printing head device has the advantages of simple structure, small volume, and low manufacturing cost.

Claims

1. A multi-beam laser deposition printing head device, characterized in that, Comprising: A print head base having opposite top and bottom ends; the print head base has a feeding channel penetrating through the end faces of the top end and the bottom end; The print head base has a plurality of laser channels spaced around the feeding channel; The distance between one end of the laser channel located at the top end and the feeding channel is greater than the distance between one end of the laser channel located at the bottom end and the feeding channel; A plurality of shaping optical lens groups are respectively and correspondingly installed in the plurality of laser channels to collimate and focus the laser beams in the laser channels; A plurality of mounting seats are respectively and correspondingly installed at the openings of the plurality of laser channels located at the top end; the mounting seats are formed with mounting holes communicating with the corresponding laser channels; a plurality of laser position adjusting screw holes radially distributed and communicating with the mounting holes are spaced along the circumferential direction of the side wall of the mounting seats; A plurality of optical fiber connectors are respectively and correspondingly installed in the plurality of mounting holes; Laser position adjusting set screws screwed into each of the laser position adjusting screw holes, one end of which extends into the corresponding mounting hole and abuts against the side wall of the corresponding optical fiber connector; A plurality of print head nozzles are respectively and correspondingly installed at one ends of the plurality of laser channels located at the bottom end; A feeding pipe is installed in the feeding channel; A feeding nozzle is installed at one end of the feeding pipe located at the bottom end.

2. The multi-beam laser deposition printing head device according to claim 1, wherein The inner wall of the feeding channel is circumferentially spaced to form a plurality of feeding position adjusting screw holes communicating with the outside; a feeding position adjusting set screw is screwed into each of the feeding position adjusting screw holes; one end of the feeding position adjusting set screw extends into the feeding channel and abuts against the side wall of the feeding pipe.

3. The multi-beam laser deposition printing head device according to claim 1, wherein, Cooling channels are formed inside the print head base at positions close to the inner walls of each of the laser channels; the plurality of cooling channels are sequentially communicated; a cooling inlet and a cooling outlet are formed on the outer wall of the print head base and communicate with both ends of the sequentially communicated plurality of cooling channels respectively.

4. The multi-beam laser deposition printing head device according to claim 3, characterized in that, The cooling channels are arranged in a spiral shape along the central axis direction of the corresponding laser channels.

5. The multi-beam laser deposition printing head device according to claim 1, wherein, It further includes an auxiliary feeding unit; the auxiliary feeding unit includes a housing, a feeding nozzle, a receiving nozzle, a wire feeding wheel set and a wire feeding driving member; the housing is installed at the top end; the feeding nozzle and the receiving nozzle are coaxially arranged along the direction from the top end to the bottom end and are respectively installed at one end of the housing away from the print head base and one end of the housing close to the print head base; the receiving nozzle communicates with one end of the feeding pipe located at the top end; the wire feeding wheel set includes a driving wheel and a driven wheel spaced along a direction perpendicular to the direction from the top end to the bottom end; both the driving wheel and the driven wheel are located between the feeding nozzle and the receiving nozzle; the wire feeding driving member is in transmission connection with the driving wheel.

6. The multi-beam laser deposition printing head device according to claim 5, characterized in that, Both the driving wheel and the driven wheel are gears with arc tooth profiles.

7. The multi-beam laser deposition printing head device according to claim 5, wherein, There are two wire feeding wheel sets; the two wire feeding wheel sets are arranged at intervals along the direction from the top end to the bottom end; the wire feeding driving member is respectively in transmission connection with the two driving wheels and is used for driving the two driving wheels to rotate synchronously.

8. The multi-beam laser deposition printing head device according to claim 7, characterized in that, The auxiliary feeding unit further includes a material guiding nozzle detachably installed in the housing; the material guiding nozzle is located between the two wire feeding wheel sets and is coaxially arranged with the material receiving nozzle and the material feeding nozzle respectively.

9. The multi-beam laser deposition printing head device according to claim 5, characterized in that, The auxiliary feeding unit further includes a powder feeding pipe; two ends of the powder feeding pipe are respectively detachably connected with one end of the material feeding nozzle close to the print head base and one end of the material receiving nozzle facing the material feeding nozzle; there is a gap between the powder feeding pipe and the driving wheel.

10. The multi-beam laser deposition printing head device according to claim 1, characterized in that, A protective gas port for conveying inert gas into the print head nozzle is formed in the side wall of each print head nozzle.

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