Automatic quick-change device of optical fiber laser head

Abstract

The invention discloses an automatic quick-changing device of an optical fiber laser head, and belongs to the technical field of laser welding, the automatic quick-changing device of the optical fiber laser head is installed on welding equipment, the welding equipment comprises an executing mechanism, a laser head support and at least two laser heads, and the executing mechanism is provided with a fixed end and a movable end; the laser head bracket is arranged beside the fixed end of the executing mechanism; the at least two laser heads are arranged on the laser head bracket; the automatic quick-change device of the optical fiber laser head comprises a male joint, a female joint and a connecting mechanism, wherein the male joint is fixed at the moving end of an executing mechanism; the female connectors are fixed on the laser head in a one-to-one correspondence manner; and the connecting mechanism is arranged on the male joint. According to the automatic quick-changing device for the optical fiber laser head, switching of the laser head can be automatically completed, the switching efficiency is high, the safety risk in the manual installation process is reduced, meanwhile, the automatic quick-changing device can be suitable for occasions where manual operation cannot be conducted directly, such as inert gas environment welding or vacuum environment welding, and the application range is wider.

Description

Technical Field

[0001] The present application relates to the field of laser welding technology, and in particular to an automatic quick-change device for a fiber laser head. Background Art

[0002] With the continuous development of laser welding technology, the types of parts that can be processed by laser welding are increasing, and the structures are becoming more and more complex. The welding processes used for different welds are often different. In a laser welding system, different laser welding heads are required to meet the requirements of different weld laser welding processes.

[0003] Traditional laser welding head quick switching devices are usually manually switched, and a specific mechanical structure is used to simplify the installation process and achieve quick installation of the laser welding head.

[0004] However, when welding complex titanium alloy parts, it is necessary to carry out the work in a vacuum environment or an inert gas environment. At this time, due to the limitations of the vacuum environment or the inert gas environment, it is impossible to manually replace the laser welding head, which is inconvenient to use. Summary of the Invention

[0005] The main purpose of this application is to provide an automatic quick-change device for a fiber laser head, aiming to solve the problem that a traditional laser welding head quick-change device can only replace the laser welding head manually, which is inconvenient to use.

[0006] To achieve the above-mentioned purpose, the present application provides an automatic quick-changing device for an optical fiber laser head, which is installed on a welding device, wherein the welding device includes an actuator, a laser head bracket and at least two laser heads, the actuator having a fixed end and a movable end; the laser head bracket is arranged next to the fixed end of the actuator; at least two laser heads are arranged on the laser head bracket, and each of the laser heads is connected to the fixed end of the actuator through an optical fiber; the automatic quick-changing device for the optical fiber laser head includes a male connector, a female connector and a connecting mechanism, the male connector is fixed to the movable end of the actuator, and the male connector has a first interface connected to the actuator; the female connector is fixed to the laser head one by one, and the female connector has a second interface connected to the corresponding laser head; the connecting mechanism is arranged on the male connector and responds to a driving force to connect or separate the male connector and the female connector; wherein, when the male connector is connected to the female connector, the first interface and the second interface are correspondingly connected.

[0007] Optionally, the first interface includes a first air / water circuit interface and a first circuit interface; the second interface includes a second air / water circuit interface and a second circuit interface.

[0008] Optionally, the female connector has a positioning hole; the connecting mechanism includes a positioning shaft, a pin shaft and a driving part, the positioning shaft is fixed to the side of the male connector facing away from the actuator, and a groove is provided on the side wall of the positioning shaft, wherein, when the male connector is connected to the female connector, the positioning shaft is inserted into the positioning hole and the side walls of the two are fitted together; the pin shaft is slidably connected in the groove; the driving part is provided in the groove and connected to the pin shaft, and the driving part drives the end of the pin shaft to slide out or slide into the groove; wherein, when the male connector is connected to the female connector, the end of the pin shaft slides out of the groove.

[0009] Optionally, the outer periphery of one end of the positioning shaft away from the male connector has a chamfer.

[0010] Optionally, the outer periphery of the end portion of the pin shaft sliding out of the groove has a chamfer.

[0011] Optionally, the pin shaft and the groove form a cavity; the driving part includes a pneumatic structure and a return spring, and the pneumatic structure is connected to the cavity; the return spring is arranged in the cavity and its axial direction is the same as that of the pin shaft.

[0012] Optionally, an annular groove is provided on the side wall of the positioning hole, and the axial direction of the annular groove is the same as the axial direction of the positioning hole; wherein, when the male connector is connected to the female connector, the end of the pin shaft is inserted into the annular groove.

[0013] Optionally, the axial direction of the pin is perpendicular to the axial direction of the positioning shaft; when the end of the pin is inserted into the annular groove, the pin abuts against both sides of the annular groove in the axial direction of the annular groove.

[0014] Optionally, the automatic quick-change device further includes a pipeline telescopic device, which connects the optical fiber and the actuator, and is used to compensate for the bending of the optical fiber.

[0015] Optionally, the pipeline telescopic device includes a first fixed ring, a second fixed ring, a guide rod, a sliding ring and a telescopic spring, the first fixed ring is fixed to the actuator; the second fixed ring is fixed to the actuator and is coaxially arranged relative to the first fixed ring, wherein in the direction of gravity, the first fixed ring is located above the second fixed ring; the guide rod is fixed between the first fixed ring and the second fixed ring; the sliding ring is slidably matched with the guide rod and has the freedom to slide along the axial direction of the guide rod, and the sliding ring is coaxially arranged with the first fixed ring; the telescopic spring is connected between the first fixed ring and the sliding ring and is coaxially arranged with the first fixed ring; wherein the optical fiber passes through the first fixed ring, the second fixed ring, the sliding ring and the telescopic spring, the optical fiber is only fixed to the sliding ring, and the guide rod is located on the periphery of the telescopic spring.

[0016] An automatic quick-changing device for an optical fiber laser head proposed in an embodiment of the present application is installed on welding equipment. When in use, the actuator moves to drive the male connector to mate with a female connector, and connects the male connector to the corresponding female connector through a connecting mechanism. In this way, the corresponding laser head can be driven and used by the actuator; when the laser head needs to be switched, the actuator drives the laser head to move to the laser head bracket, and separates the male connector from the corresponding female connector through the connecting mechanism. At this time, the actuator can continue to drive the male connector to move and mate with the female connector corresponding to the required laser head, and then connect it through the connecting mechanism; in this way, the switching of the laser head can be completed automatically, the switching efficiency is high, and the safety risks of the manual installation process are reduced. At the same time, it can be used in occasions where manual operation cannot be directly performed, such as welding in an inert gas environment or welding in a vacuum environment, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the embodiments of the present invention. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other drawings based on the provided drawings without inventive effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0019] Figure 1 A schematic diagram of the installation structure of an automatic quick-change device for a fiber laser head proposed in an embodiment of the present application; Figure 2 Schematic diagram of the structure of the male connector in the embodiment of the present application; Figure 3 This is a schematic structural diagram of the female connector in an embodiment of the present application; Figure 4 This is a schematic structural diagram of a pipeline telescopic device for a fiber laser head proposed in an embodiment of the present application.

[0020] In the figure: 101, actuator; 102, laser head; 104, male connector; 105, female connector; 106, laser head bracket; 107, pipeline telescopic device; 201, positioning shaft; 202, pin shaft; 203, first air / water channel interface; 204, first circuit interface; 301, positioning hole; 302, annular groove; 303, second air / water channel interface; 304, second circuit interface; 401, first fixing ring; 402, telescopic spring; 403, sliding ring; 404, second fixing ring; 405, guide rod; 406, mounting plate.

[0021] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 A schematic diagram of the installation structure of an automatic quick-change device for a fiber laser head proposed in an embodiment of the present application; Figure 2 Schematic diagram of the structure of the male connector in the embodiment of the present application; Figure 3 This is a schematic structural diagram of the female connector in an embodiment of the present application; Figure 4 This is a schematic structural diagram of a pipeline telescopic device for a fiber laser head proposed in an embodiment of the present application.

[0028] refer to Figures 1 to 4 , the embodiment of the present application provides an automatic quick-change device for an optical fiber laser head, which is installed on a welding device. The welding device may include an actuator 101, a laser head bracket 106 and at least two laser heads 102. The actuator 101 has a fixed end and a movable end; the laser head bracket 106 is arranged next to the fixed end of the actuator 101; at least two laser heads 102 are arranged on the laser head bracket 106, and each laser head 102 is connected to the fixed end of the actuator 101 through an optical fiber; the automatic quick-change device for the optical fiber laser head may include a male connector 104, a female connector Head 105 and connecting mechanism, the male connector 104 is fixed to the moving end of the actuator 101, and the male connector 104 has a first interface connected to the actuator 101; the female connector 105 is fixed to the laser head 102 in a one-to-one correspondence, and the female connector 105 has a second interface connected to the corresponding laser head 102; the connecting mechanism is set on the male connector 104 and responds to the driving force to connect or separate the male connector 104 and the female connector 105; wherein, when the male connector 104 and the female connector 105 are connected, the first interface and the second interface are correspondingly connected.

[0029] An automatic quick-changing device for an optical fiber laser head proposed in an embodiment of the present application is installed on welding equipment. When in use, the actuator 101 moves, driving the male connector 104 to align with a female connector 105, and connecting the male connector 104 to the corresponding female connector 105 through the connecting mechanism. In this way, the corresponding laser head 102 can be driven and used by the actuator 101; when the laser head 102 needs to be switched, the actuator 101 drives the laser head 102 to move to the laser head bracket 106, and separates the male connector 104 from the corresponding female connector 105 through the connecting mechanism. At this time, the actuator 101 can continue to drive the male connector 104 to move and align it with the female connector 105 corresponding to the required laser head 102, and then connect it through the connecting mechanism; in this way, the switching of the laser head 102 can be automatically completed, the switching efficiency is high, and the safety risks of the manual installation process are reduced. At the same time, it can be applicable to occasions where manual operation cannot be directly performed, such as welding in an inert gas environment or welding in a vacuum environment, and has a wider range of applications.

[0030] The actuator 101 may be a robotic arm, one end of which is fixed and the other end of which is movable in multiple directions and angles. The laser head bracket 106 may be arranged next to the robotic arm for placing the laser head 102 .

[0031] In addition, the number of laser heads 102 can be two, three, four, etc. to facilitate mechanical switching of the laser heads. The laser heads 102 can be placed on the laser head bracket 106 from top to bottom so that the female connector 105 faces upward, making it easier for the actuator 101 to drive the male connector 104 to mate with the female connector 105.

[0032] For example, using the direction of gravity as an example, the laser head 102 can be mounted above the laser head bracket 106, and at this time the female connector 105 is located above the laser head 102. At this time, the actuator 101 drives the male connector 104 to move above the female connector 105 and continues to move downward, so that the male connector 104 and the female connector 105 are aligned and connected through the connecting mechanism.

[0033] When it is necessary to separate the male connector 104 and the female connector 105, the actuator 101 drives the corresponding laser head 102 to move above the laser head bracket 106 and continues to move downward, so that the laser head 102 is mounted above the laser head bracket 106. At this time, the male connector 104 and the female connector 105 are separated by the connecting mechanism, and the actuator 101 drives the male connector 104 to move upward.

[0034] The specific shape of the laser head bracket 106 is not limited, as long as it can support the laser head 102 .

[0035] It should be noted that when the male connector 104 and the female connector 105 are connected to each other, the first interface and the second interface are connected to each other, so as to realize the transmission of energy required by the laser head 102 .

[0036] refer to Figure 2 and Figure 3 In an exemplary embodiment, the first interface may include a first gas / water interface 203 and a first circuit interface 204 ; the second interface may include a second gas / water interface 303 and a second circuit interface 304 .

[0037] It should be noted that the first gas / water channel interface 203 includes a first gas channel interface and a first water channel interface. Similarly, the second gas / water channel interface 303 also includes a second gas channel interface and a second water channel interface.

[0038] It should be understood that the first interface and the second interface are connected, which means that the first air circuit interface and the second air circuit interface are connected, the first water circuit interface and the second water circuit interface are connected, and the first circuit interface 204 and the second circuit interface 304 are connected.

[0039] Among them, when the male connector 104 and the female connector 105 are connected accordingly, the first interface and the second interface are connected, and when the male connector 104 and the female connector 105 are separated, the first interface and the second interface are both closed. There are many existing solutions for structures similar to this type of connection, connection, separation and closure, which will not be described in detail this time.

[0040] Furthermore, a sealing rubber ring may be provided on the end face of the second air / water channel interface 303 on the side of the female connector 105 facing away from the corresponding laser head 102 to ensure reliable sealing of the water channel and the air channel.

[0041] refer to Figures 1 to 3 In an exemplary embodiment, a positioning hole 301 is provided on the female connector 105; the connecting mechanism may include a positioning shaft 201, a pin 202 and a driving unit, the positioning shaft 201 is fixed to the side of the male connector 104 facing away from the actuator 101, and a groove is provided on the side wall of the positioning shaft 201, wherein, when the male connector 104 is connected to the female connector 105, the positioning shaft 201 is inserted into the positioning hole 301 and the side walls of the two are in contact; the pin 202 is slidably connected to the groove; the driving unit is provided in the groove and connected to the pin 202, and the driving unit drives the end of the pin 202 to slide out or slide into the groove; wherein, when the male connector 104 is connected to the female connector 105, the end of the pin 202 slides out of the groove.

[0042] When the positioning shaft 201 is inserted into the positioning hole 301 , the driving unit drives the end of the pin shaft 202 to slide out of the groove and squeeze and contact the side wall of the positioning hole 301 , thereby connecting the male connector 104 and the female connector 105 .

[0043] Furthermore, the outer periphery of the end of the positioning shaft 201 away from the male connector 104 has a chamfer. In this way, when the actuator 101 moves the male connector 104 to above the female connector 105, even if the positioning shaft 201 is not aligned with the positioning hole 301, the male connector 104 moves downward at this time. The chamfer on the positioning shaft 201 can also make the positioning shaft 201 enter the positioning hole 301, which is more convenient to use.

[0044] The positioning shaft 201 and the positioning hole 301 are not aligned, which means that the axial direction of the positioning shaft 201 and the axial direction of the positioning hole 301 do not coincide with each other, and there is a certain position error.

[0045] In an exemplary embodiment, the pin 202 and the groove form a cavity; the driving part may include a pneumatic structure and a return spring, and the pneumatic structure is connected to the cavity; the return spring is arranged in the cavity and has the same axial direction as the pin 202.

[0046] Among them, the pneumatic structure can inhale and deflate. When the pneumatic structure inhales air, negative pressure is formed in the cavity, causing the pin shaft 202 to completely retract into the groove. At this time, the return spring is compressed, and the male connector 104 is separated from the female connector 105; when the pneumatic structure deflates, the return spring returns to its deformation, pushing the pin shaft 202 out of the groove, so that the male connector 104 is connected to the female connector 105.

[0047] If it is necessary to explain, there are many structures that can realize air intake and exhaust, which will not be explained in detail here.

[0048] Further, such as Figure 3 As shown, a plurality of pins 202 can be arranged around the positioning shaft 201. In the embodiment of the present application, there are four pins 202, and there are four cavities. There are also four return springs. There can be only one pneumatic structure, which is connected to the four cavities. The four cavities can be evacuated and deflated through one pneumatic structure.

[0049] In an exemplary embodiment, an annular groove 302 is provided on the side wall of the positioning hole 301 , and the axial direction of the annular groove 302 is the same as the axial direction of the positioning hole 301 ; wherein, when the male connector 104 is connected to the female connector 105 , the end of the pin shaft 202 is inserted into the annular groove 302 .

[0050] Specifically, when the pin shaft 202 extends out of the groove and is inserted into the annular groove 302 , the connection between the male connector 104 and the female connector 105 is more stable.

[0051] Furthermore, the outer periphery of the end of the pin shaft 202 that slides out of the groove has a chamfer. Similarly, when the positioning shaft 201 is inserted into the positioning hole 301, even if the pin shaft 202 is not aligned with the annular groove 302, when the pin shaft 202 extends out of the groove, the chamfer on the pin shaft 202 can make the pin shaft 202 enter the annular groove 302, which is more convenient to use.

[0052] The pin 202 is not aligned with the annular groove 302 , which means that after the pin 202 extends out of the groove in the axial direction, it cannot directly extend into the annular groove 302 , resulting in a certain position error.

[0053] In an exemplary embodiment, the axial direction of the pin 202 is perpendicular to the axial direction of the positioning shaft 201 ; when the end of the pin 202 is inserted into the annular groove 302 , the pin 202 abuts against both sides of the annular groove 302 in the axial direction of the annular groove 302 .

[0054] Specifically, the axial direction of the pin 202 is perpendicular to the axial direction of the positioning shaft 201, so that the process of inserting the pin 202 into the annular groove 302 is more convenient; when the end of the pin 202 is inserted into the annular groove 302, in the axial direction of the annular groove 302, the pin 202 conflicts with both sides of the annular groove 302, so that while locking the male connector 104 and the female connector 105, it can also ensure that the male connector 104 and the female connector 105 are stably aligned to prevent relative shaking between the two.

[0055] refer to Figure 1 and Figure 4 In an exemplary embodiment, the automatic quick-change device may further include a pipeline expansion and contraction device 107, which connects the optical fiber to the actuator 101 and is used to compensate for the bending of the optical fiber. In an exemplary embodiment, the pipeline expansion and contraction device 107 may include a first fixing ring 401, a second fixing ring 404, a guide rod 405, a sliding ring 403, and a expansion and contraction spring 402. The first fixing ring 401 is fixed to the actuator 101; the second fixing ring 404 is fixed to the actuator 101 and is coaxially arranged relative to the first fixing ring, wherein in the direction of gravity, the first fixing ring 401 is located above the second fixing ring 404; the guide rod 405 is fixed between the first fixing ring 401 and the second fixing ring 404. ; The sliding ring 403 is in sliding cooperation with the guide rod 405 and has the freedom to slide along the axial direction of the guide rod 405. The sliding ring 403 is coaxially arranged with the first fixed ring 401; the telescopic spring 402 is connected between the first fixed ring 401 and the sliding ring 403 and is coaxially arranged with the first fixed ring 401; wherein, the optical fiber passes through the first fixed ring 401, the second fixed ring 404, the sliding ring 403 and the telescopic spring 402, the optical fiber is only fixed to the sliding ring 403, and the guide rod 405 is located on the periphery of the telescopic spring 402.

[0056] The first fixing ring 401 and the second fixing ring 404 are fixed to the actuator 101 through the mounting plate 406; in addition, the components between the first fixing ring 401 and the second fixing ring 404 can be wrapped with a jacket to present a Figure 1 The status shown, Figure 4 The state shown is the pipeline expansion and contraction device 107 after the outer cover is removed.

[0057] It should be understood that the optical fiber is only fixed to the sliding ring 403, which means that the optical fiber and the sliding ring 403 move synchronously to drive the spring to extend or shorten. At the same time, the optical fiber and the first fixing ring 401 and the second fixing ring 404 can slide relative to each other.

[0058] Specifically, the telescopic spring 402 is always in a compressed state. Taking the process of switching the laser head 102 by the actuator 101 as an example, when the actuator 101 drives the laser head 102 to work at a fixed end away from the actuator 101, the laser head 102 drives the optical fiber to move, and the optical fiber further drives the sliding ring 403 close to the first fixed ring 401, and the telescopic spring 402 is further compressed, so that the telescopic spring 402 continuously applies a force to the optical fiber away from the laser head 102, so that the optical fiber between the laser head 102 and the pipeline telescopic device 107 is tightened; when the actuator 101 drives the laser head 102 to move to the laser head bracket 106 for replacing the laser head 102, the laser head 102 drives the optical fiber to move, and the telescopic spring 402 in a compressed state continuously applies a force to the optical fiber away from the laser head 102, so that the optical fiber between the laser head 102 and the pipeline telescopic device 107 is tightened.

[0059] It should be understood that the optical fiber between the laser head 102 and the pipeline expansion device 107 is tightened to prevent the optical fiber here from sagging due to its own gravity during operation and producing a smaller curvature radius, that is, to ensure that the optical fiber will not be broken or damaged due to the smaller curvature radius.

[0060] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An automatic quick-change device for a fiber laser head, characterized in that: Installed on welding equipment, the welding equipment includes: An actuator (101) having a fixed end and a movable end; A laser head bracket (106) is arranged next to the fixed end of the actuator (101); At least two laser heads (102) are both arranged on the laser head bracket (106), and each of the laser heads (102) is connected to a fixed end of the actuator (101) via an optical fiber; The automatic quick-change device of the fiber laser head includes: A male connector (104) is fixed to the movable end of the actuator (101), and the male connector (104) has a first interface in communication with the actuator (101); A female connector (105) is fixed on the laser head (102) in a one-to-one correspondence, and the female connector (105) has a second interface that communicates with the corresponding laser head (102); a connecting mechanism, disposed on the male connector (104) and responsive to a driving force to connect or disconnect the male connector (104) and the female connector (105); Wherein, when the male connector (104) is connected to the female connector (105), the first interface and the second interface are correspondingly connected.

2. The automatic quick-change device for a fiber laser head according to claim 1, wherein: The first interface comprises a first gas / water interface (203) and a first circuit interface (204); The second interface comprises a second air / water circuit interface (303) and a second circuit interface (304).

3. The automatic quick-change device for a fiber laser head according to claim 1, wherein: The female connector (105) has a positioning hole (301); the connecting mechanism comprises: A positioning shaft (201) is fixed to a side of the male connector (104) facing away from the actuator (101), and a groove is provided on a side wall of the positioning shaft (201), wherein when the male connector (104) is connected to the female connector (105), the positioning shaft (201) is inserted into the positioning hole (301) and the side walls of the two are in contact with each other; A pin (202) is slidably connected in the groove; a driving portion, disposed in the groove and connected to the pin shaft (202), the driving portion driving the end of the pin shaft (202) to slide out of or into the groove; When the male connector (104) is connected to the female connector (105), the end of the pin (202) slides out of the groove.

4. The automatic quick-change device for a fiber laser head according to claim 3, wherein: An annular groove (302) is provided on the side wall of the positioning hole (301), and the axial direction of the annular groove (302) is the same as the axial direction of the positioning hole (301); When the male connector (104) is connected to the female connector (105), the end of the pin (202) is inserted into the annular groove (302).

5. The automatic quick-change device for a fiber laser head according to claim 3, wherein: The outer periphery of the end of the pin shaft (202) sliding out of the groove has a chamfer.

6. The automatic quick-change device for a fiber laser head according to claim 3, wherein: The pin shaft (202) and the groove enclose a cavity; the driving part comprises: a pneumatic structure communicating with the cavity; A return spring is arranged in the cavity and has an axial direction that is the same as that of the pin shaft (202).

7. The automatic quick-change device for a fiber laser head according to claim 3, wherein: The outer periphery of one end of the positioning shaft (201) away from the male connector (104) has a chamfer.

8. The automatic quick-change device for a fiber laser head according to claim 7, wherein: The axial direction of the pin shaft (202) is perpendicular to the axial direction of the positioning shaft (201); When the end of the pin shaft (202) is inserted into the annular groove (302), the pin shaft (202) abuts against both sides of the annular groove (302) in the axial direction of the annular groove (302).

9. The automatic quick-change device for a fiber laser head according to claim 1, wherein: The automatic quick-change device also includes: A pipeline expansion and contraction device (107) connects the optical fiber and the actuator (101), and the pipeline expansion and contraction device (107) is used to compensate for the bending of the optical fiber.

10. The automatic quick-change device for a fiber laser head according to claim 9, wherein: The pipeline expansion and contraction device (107) comprises: A first fixing ring (401) is fixed to the actuator (101); a second fixing ring (404) fixed to the actuator (101) and coaxially arranged opposite to the first fixing ring, wherein in the direction of gravity, the first fixing ring (401) is located above the second fixing ring (404); A guide rod (405) is fixed between the first fixing ring (401) and the second fixing ring (404); a sliding ring (403) that is in sliding engagement with the guide rod (405) and has the freedom to slide along the axial direction of the guide rod (405); the sliding ring (403) is coaxially arranged with the first fixed ring (401); a telescopic spring (402), connected between the first fixing ring (401) and the sliding ring (403) and coaxially arranged with the first fixing ring (401); The optical fiber passes through the first fixing ring (401), the second fixing ring (404), the sliding ring (403) and the telescopic spring (402); the optical fiber is only fixed to the sliding ring (403); and the guide rod (405) is located outside the telescopic spring (402).

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