An automatic nozzle replacement device for a laser cutting head

Abstract

The present invention discloses an automatic nozzle replacement device for a laser cutting head, which includes a fixed seat, a rotating seat, a lifting and rotating device, a ceramic ring stabilizing device, a movable seat, a driving device and a clamping jaw. The rotating seat is arranged on the lifting and rotating device, the fixed seat is arranged on the rotating seat, the ceramic ring stabilizing device is arranged on one side of the fixed seat, the movable seat is slidably arranged in the fixed seat and is provided with a nozzle accommodating part, two clamping jaws are symmetrically arranged on both sides of the fixed seat respectively, and the driving device is arranged on one side of the fixed seat. In the present invention, by arranging a nozzle accommodating part in the movable seat and clamping jaws on the fixed seat for clamping the locking ring, the movable seat and the clamping jaws are simultaneously controlled by the driving device, the ceramic ring is fixed by the ceramic ring stabilizing device, and the rotating seat is driven by the lifting and rotating device to rotate and lift, so as to complete the disassembly and installation process of the nozzle, realize the automatic replacement of the nozzle of the laser cutting head, avoid the problem of damaging the ceramic ring by manual operation, and improve the safety factor and production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting equipment, and particularly to an automatic nozzle replacement device for a laser cutting head. Background Art

[0002] Laser cutting is a thermal cutting technology, which has the advantages of fast cutting speed, high production efficiency, good cutting end face quality, small heat affected zone, and environmental protection. During the process of laser cutting metal materials with different thicknesses, in order to achieve better cutting effects, it is usually necessary to replace the corresponding type of nozzle according to the requirements of the actual cutting working conditions; and since the laser cutting process belongs to a high-temperature process, some flying chips generated during the cutting process will cause a certain degree of damage to the nozzle, affecting the cutting quality. Therefore, it is also necessary to regularly disassemble and detect the nozzle and replace it.

[0003] Generally, the nozzle is installed on the ceramic ring through a locking ring, and the ceramic ring is installed on the cutting head body. When replacing, it is necessary to fix the ceramic ring and rotate the locking ring to separate the ceramic ring and the nozzle. The traditional replacement of the nozzle relies on manual operation, which not only makes the replacement process cumbersome, but also easily damages the ceramic ring, and has a low safety factor. After the replacement is completed, it is also necessary to calibrate the corresponding working conditions, and then perform the cutting process, resulting in a long replacement time and affecting the production efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automatic nozzle replacement device for a laser cutting head to solve the problems raised in the above background art. To achieve the above purpose, the following technical solutions are adopted in the present invention:

[0005] The automatic nozzle replacement device for a laser cutting head includes a fixed seat, a rotating seat, a lifting and rotating device, a ceramic ring stabilizing device, a movable seat, a driving device, and two clamping jaws. The rotating seat is arranged at the working end of the lifting and rotating device, the fixed seat is arranged on the rotating seat, the ceramic ring stabilizing device is arranged on one side of the fixed seat, the movable seat is slidably arranged in the fixed seat, one end of which is provided with a nozzle accommodating part, the two clamping jaws are symmetrically and elastically arranged on both sides of the fixed seat respectively, the clamping ends of the two clamping jaws correspond to the nozzle accommodating part, and their control ends are respectively slidably connected with the movable seat. The driving device is arranged on one side of the fixed seat and is used to drive the movable seat away from the rotating seat, and when the movable seat moves away from the rotating seat, the clamping ends of the two clamping jaws are simultaneously driven to approach each other.

[0006] Optionally, a first accommodating cavity is arranged at the upper part of the fixed seat, and a second accommodating cavity is arranged at the lower part of the fixed seat. The first accommodating cavity and the second accommodating cavity are communicated through a through hole.

[0007] Optionally, a driving part is provided at one end of the movable seat away from the nozzle accommodating part, a connecting part is provided between the driving part and the nozzle accommodating part, the connecting part is slidably connected to the through hole, the driving part is slidably connected to the second accommodating cavity, and the nozzle accommodating part is slidably connected to the first accommodating cavity.

[0008] Optionally, the control ends of the two jaws are respectively slidably connected to the driving part.

[0009] Optionally, one end of the driving part close to the nozzle accommodating part is conical.

[0010] Optionally, the driving device includes a driving cylinder and a connecting rod. The driving cylinder is arranged on one side of the fixed seat. The connecting rod is rotatably arranged on the rotating seat. Its first end is connected to the driving cylinder, and its second end extends into the second accommodating cavity and abuts against the driving part.

[0011] Optionally, an elastic member is sleeved on the connecting part, and the elastic member is used to keep the movable seat close to the rotating seat side.

[0012] Optionally, the ceramic ring stabilizing device includes a locking seat, a locking arm, a second elastic member and a locking cylinder. The locking seat is arranged on one side of the fixed seat. The locking arm is rotatably arranged in the locking seat. A locking claw is arranged at the first end of the locking arm. The second elastic member connects the locking seat and the locking arm. The second elastic member is used to keep the first end of the locking arm close to the fixed seat side. The locking cylinder is arranged outside the lifting and rotating device, and its working end is provided with a driving plate, and the driving plate abuts against the second end of the locking arm.

[0013] Optionally, the lifting and rotating device includes a lifting component and a rotating component, and the rotating component is arranged at the working end of the lifting component.

[0014] Optionally, a translation device is further included. The translation device includes a linear slide table and a mounting seat. The mounting seat is arranged at the working end of the linear slide table, and the lifting and rotating device is arranged on the mounting seat.

[0015] The beneficial effect compared with the prior art is that with the above scheme, the structure of the present invention is compact and ingeniously designed. It can realize the production of fuses of different specifications, has a wide adaptability, realizes fully automated production, saves labor, improves production efficiency, and has good market application value.

[0016] The beneficial effects compared with the prior art are as follows. By adopting the above solution, in the present invention, a nozzle accommodating part is arranged in the movable seat for placing the nozzle, and clamping jaws are arranged on the fixed seat for clamping the locking ring. The driving device controls the movable seat and the clamping jaws simultaneously. The ceramic ring is fixed by the ceramic ring stabilizing device, and the rotating seat is driven to rotate and lift by the lifting and rotating device to complete the disassembly and installation process of the nozzle, realizing the automatic replacement of the nozzle of the laser cutting head, avoiding the problem of damaging the ceramic ring by manual operation, and improving the safety factor and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 For the present invention Figure 1 schematic diagram of the partial structure of the embodiment;

[0019] Figure 3 For the present invention Figure 1 schematic diagram of the structure of the fixed seat, movable seat and two clamping jaws of the embodiment;

[0020] Figure 4 For the present invention Figure 1 schematic diagram of the sectional structure of the fixed seat of the embodiment;

[0021] Figure 5 For the present invention Figure 1 schematic diagram of the structure of the movable seat of the embodiment;

[0022] Figure 6 For the present invention Figure 1 schematic diagram of the structure of the ceramic ring stabilizing device of the embodiment;

[0023] Figure 7 For the present invention Figure 1 schematic diagram of the structure of the ceramic ring stabilizing device of the embodiment;

[0024] Figure 8 For the present invention Figure 1 schematic diagram of the structure of the lifting and rotating device of the embodiment;

[0025] As shown in the above drawings: 1. Fixed seat; 2. Rotating seat; 3. Lifting and rotating device; 4. Ceramic ring stabilizing device; 5. Movable seat; 6. Driving device; 7. Claw; 8. Translating device; 51. Nozzle accommodating part; 11. First accommodating cavity; 12. Second accommodating cavity; 13. Through hole; 52. Driving part; 53. Connecting part; 14. Claw mounting groove; 61. Driving cylinder; 62. Link; 531. Elastic member; 41. Locking seat; 42. Locking arm; 43. Second elastic member; 44. Locking cylinder; 45. Locking claw; 46. Driving plate; 31. Lifting assembly; 32. Rotating assembly; 311. Base; 312. Guide rail; 313. Servo motor; 314. Lifting seat; 315. Lead screw; 321. Driving rotating shaft; 322. Second servo motor; 81. Linear slide; 82. Mounting seat. Detailed implementation mode

[0026] For the convenience of understanding the present invention, the present application will be described in more detail below in conjunction with the drawings and specific embodiments; the preferred embodiments of the present application are shown in the drawings; however, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification; on the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive.

[0027] It should be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components; for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations; the terms "vertical", "horizontal", "left", "right", "front", "rear" and similar expressions used in this specification are only for the purpose of illustration.

[0028] At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects and do not have to be used to describe a specific order or sequence; it should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit this application.

[0030] Such as Figure 1-3As shown in the figure, an embodiment of the present invention is: the automatic nozzle replacement device of the laser cutting head, which includes a fixed seat 1, a rotating seat 2, a lifting and rotating device 3, a ceramic ring stabilizing device 4, a movable seat 5, a driving device 6 and two clamping jaws 7. The rotating seat 2 is arranged at the working end of the lifting and rotating device 3, the fixed seat 1 is arranged on the rotating seat 2, the ceramic ring stabilizing device 4 is arranged on one side of the fixed seat 1, the movable seat 5 is slidably arranged in the fixed seat 1, one end of which is provided with a nozzle accommodating part 51. The two clamping jaws 7 are symmetrically and elastically arranged on both sides of the fixed seat 1 respectively. The clamping ends of the two clamping jaws 7 correspond to the nozzle accommodating part 51, and their control ends are respectively slidably connected with the movable seat 5. The driving device 6 is arranged on one side of the fixed seat 1 for driving the movable seat 5 away from the rotating seat 2, and when the movable seat 5 moves away from the rotating seat 2, the clamping ends of the two clamping jaws 7 are driven to approach each other simultaneously.

[0031] In this embodiment, the lifting and rotating device 3 is vertically arranged, the rotating seat 2 is horizontally arranged at the working end of the lifting and rotating device 3. The lifting and rotating device 3 is used to drive the rotating seat 2 to lift and rotate. The fixed seat 1 is arranged in the middle of the top surface of the rotating seat 2, and the two are concentrically arranged. When the rotating seat 2 rotates, it drives the fixed seat 1 to rotate simultaneously. The ceramic ring stabilizing device 4 is arranged at the rear side of the fixed seat 1. The movable seat 5 is slidably arranged in the fixed seat 1, and its top end is provided with a nozzle accommodating part 51 for placing the nozzle. The two clamping jaws 7 are symmetrically and elastically arranged on the left and right sides of the fixed seat 1 respectively. The clamping ends of the two clamping jaws 7 correspond to the nozzle accommodating part 51 for clamping the locking ring. The driving device 6 is arranged at the front side of the fixed seat 1 for driving the movable seat 5 to move upward in the fixed seat 1. The control ends of the two clamping jaws 7 are respectively slidably connected with the movable seat 5. When the movable seat 5 moves upward, the movable seat 5 drives the clamping ends of the two clamping jaws 7 to approach each other.

[0032] It can be understood that when disassembling the nozzle, the lifting and rotating device 3 drives the rotating seat 2 to rise, aligning the nozzle with the nozzle receiving portion 51 of the movable seat 5. The driving device 6 drives the movable seat 5 to rise, enabling the nozzle to enter the nozzle receiving portion 51. At the same time, the two clamping jaws 7 clamp the locking ring, and the ceramic ring stabilizing device 4 fixes the ceramic ring. The lifting and rotating device 3 drives the rotating seat 2 to rotate and gradually descend to remove the locking ring. The ceramic ring stabilizing device 4 releases the ceramic ring, the driving device 6 resets, and the clamping jaws 7 release the locking ring. At this time, the nozzle is located within the nozzle receiving portion 51, and the locking ring is located at the top of the nozzle receiving portion 51. When installing the nozzle, the nozzle is placed into the nozzle receiving portion 51. The driving device 6 drives the movable seat 5 to rise, making the clamping position of the locking ring correspond to the clamping ends of the two clamping jaws 7. The two clamping jaws 7 clamp the nozzle, the ceramic ring stabilizing device 4 clamps the ceramic ring, and the lifting and rotating device 3 drives the fixed seat 1 to rotate to lock the locking ring and the ceramic ring. After the installation is completed, the driving device 6 resets, the two clamping jaws 7 release the locking ring, and the ceramic ring stabilizing device 4 releases the ceramic ring, completing the nozzle replacement operation.

[0033] In this application, a nozzle receiving portion 51 is provided within the movable seat 5 for placing the nozzle, and clamping jaws 7 are provided on the fixed seat 1 for clamping the locking ring. The driving device 6 controls the movable seat 5 and the clamping jaws 7 simultaneously. The ceramic ring is fixed by the ceramic ring stabilizing device 4, and the lifting and rotating device 3 drives the rotating seat 2 to rotate and lift to complete the disassembly and installation process of the nozzle, realizing the automatic replacement of the nozzle of the laser cutting head, avoiding the problem of manual operation damaging the ceramic ring, and improving the safety factor and production efficiency.

[0034] In one embodiment, as Figure 4 shown, a first receiving cavity 11 is provided in the upper part of the fixed seat 1, and a second receiving cavity 12 is provided in the lower part. The first receiving cavity 11 and the second receiving cavity 12 are communicated through a through hole 13.

[0035] Specifically, a first receiving cavity 11 is opened downward in the middle of the top end of the fixed seat 1, and a second receiving cavity 12 is opened upward in the middle of its bottom end. A through hole 13 is opened at the bottom of the first receiving cavity 11, and the through hole 13 is communicated with the second receiving cavity 12. The first receiving cavity 11 is used to accommodate the nozzle receiving portion 51. In the initial state, the top end of the movable seat 5 is lower than the top surface of the first receiving cavity 11, facilitating the placement of the nozzle and the locking ring.

[0036] In one embodiment, as Figure 5 shown, a driving portion 52 is provided at one end of the movable seat 5 away from the nozzle receiving portion 51. A connecting portion 53 is provided between the driving portion 52 and the nozzle receiving portion 51. The connecting portion 53 is slidably connected to the through hole 13, the driving portion 52 is slidably connected to the second receiving cavity 12, and the nozzle receiving portion 51 is slidably connected to the first receiving cavity 11.

[0037] Specifically, the top end of the movable seat 5 is a nozzle receiving portion 51. A tapered hole is formed at the top end of the nozzle receiving portion 51 for receiving the nozzle. The bottom end of the movable seat 5 is a driving portion 52. A connecting portion 53 is provided between the nozzle receiving portion 51 and the driving portion 52. The connecting portion 53 is slidably connected to the through hole 13. The nozzle receiving portion 51 is slidably connected to the first receiving cavity 11. The driving portion 52 is slidably connected to the second receiving cavity 12. This can ensure the stable movement state of the movable seat 5. The through hole 13 is used to limit the movable seat 5.

[0038] In one embodiment, the control ends of the two jaws 7 are respectively slidably connected to the driving portion 52.

[0039] Specifically, clamping jaw mounting grooves 14 are respectively provided on both sides of the fixed seat 1. The middle parts of the two jaws 7 are respectively rotatably arranged in the two clamping jaw mounting grooves 14 through clamping jaw 7 rotating shafts. Torsion springs are respectively sleeved on the two rotating shafts. The two torsion springs respectively keep the clamping ends of the two jaws 7 away from each other. By simultaneously controlling the control ends of the two jaws 7 through the driving portion 52, clamping of the locking ring is achieved. The torsion springs are used for the reset of the jaws 7.

[0040] In one embodiment, as Figure 5 shown, one end of the driving portion 52 close to the nozzle receiving portion 51 is conical.

[0041] Specifically, the top of the driving portion 52 is a frustum of a cone with a smaller top and a larger bottom. The bottoms of the two jaws 7 are provided with inclined surfaces matching the frustum of the cone. In this way, during the rising process of the driving portion 52, it is easier to control the actions of the two jaws 7.

[0042] In other embodiments, rollers are respectively rotatably arranged at the bottoms of the two jaws 7. The two rollers are respectively in rolling connection with the inclined surfaces of the frustum of the cone.

[0043] Furthermore, driving inclined surfaces corresponding to the two jaws 7 are respectively provided on both sides of the top of the driving portion 52. The two driving inclined surfaces are respectively in rolling connection with the two rollers.

[0044] In one embodiment, as Figure 6 shown, the driving device 6 includes a driving cylinder 61 and a connecting rod 62. The driving cylinder 61 is arranged on one side of the fixed seat 1. The connecting rod 62 is rotatably arranged on the rotating seat 2. Its first end is connected to the driving cylinder 61, and its second end extends into the second receiving cavity 12 and abuts against the driving portion 52.

[0045] Specifically, the driving cylinder 61 is vertically arranged downward at the front side of the fixed seat 1. A through groove is formed through the side wall of the second accommodating cavity 12. The middle part of the connecting rod 62 is rotatably arranged on the rotating seat 2 through a shaft seat. The inner end of the connecting rod 62 passes through the through groove and extends to the bottom end of the movable seat 5. The outer end of the connecting rod 62 is connected to the working end of the driving cylinder 61. A roller is rotatably arranged at the inner end of the connecting rod 62, and the roller abuts against the driving part 52. During operation, the driving cylinder 61 moves downward, causing the outer end of the connecting rod 62 to move downward and its inner end to move upward, jacking up the movable seat 5, causing the locking ring and the nozzle to move upward simultaneously, and then controlling the two clamping jaws 7 through the driving seat to clamp the locking ring.

[0046] In one embodiment, as Figure 5 shown, an elastic member 531 is sleeved on the connecting portion 53, and the elastic member 531 is used to keep the movable seat 5 close to the rotating seat 2.

[0047] Specifically, the elastic member 531 is sleeved on the lower end of the connecting portion 53, and the elastic member 531 is located in the second accommodating cavity 12. When the driving cylinder 61 contracts, it is used to reset the movable seat 5 and at the same time make the nozzle and the ceramic ring in the nozzle accommodating portion 51 have a certain elasticity to avoid damage to the ceramic ring.

[0048] In one embodiment, as Figure 7 shown, the ceramic ring stabilizing device 4 includes a locking seat 41, a locking arm 42, a second elastic member 43 and a locking cylinder 44. The locking seat 41 is arranged on one side of the fixed seat 1. The locking arm 42 is rotatably arranged in the locking seat 41. A locking claw 45 is arranged at the first end of the locking arm 42. The second elastic member 43 connects the locking seat 41 and the locking arm 42, and the second elastic member 43 is used to keep the first end of the locking arm 42 close to the fixed seat 1. The locking cylinder 44 is arranged outside the lifting and rotating device 3, and its working end is provided with a driving plate 46, and the driving plate 46 abuts against the second end of the locking arm 42.

[0049] Specifically, the locking seat 41 is arranged at the rear side of the fixed seat 1. The middle part of the locking arm 42 is rotatably arranged in the locking seat 41. A locking claw 45 is arranged at the top end of the locking arm 42, and the locking claw 45 is used to fix the ceramic ring. The second elastic member 43 is arranged in the locking seat 41 and is connected to the locking arm 42 to keep the top end of the locking arm 42 close forward. The locking cylinder 44 is arranged outside the lifting and rotating device 3, and a locking plate is vertically installed at the working end corresponding to the bottom end of the locking arm 42. The vertical locking plate can still control the locking arm 42 when the rotating seat 2 rises to the top end. It can be understood that there is no connection between the locking cylinder 44 and the locking arm 42. When installing and disassembling the nozzle, the position of the rotating seat 2 is fixed. The locking cylinder 44 extends to push the bottom end of the locking arm 42 forward, and the top end of the locking arm 42 moves backward, and the locking claw 45 does not contact the ceramic ring. When it is necessary to lock the ceramic ring, the locking cylinder 44 contracts, and the second elastic member 43 makes the locking claw 45 clamp the ceramic ring without affecting the rotation of the rotating seat 2. The second elastic member 43 can be a spring.

[0050] In one embodiment, as Figure 8 shown, the lifting and rotating device 3 includes a lifting component 31 and a rotating component 32, and the rotating component 32 is arranged at the working end of the lifting component 31.

[0051] Specifically, the lifting component 31 includes a base 311, a guide rail 312, a servo motor 313, a lifting seat 314 and a lead screw 315. The guide rail 312 is vertically arranged on the base 311. The lead screw 315 is rotatably arranged in the base 311. The lifting seat 314 is slidably arranged on the guide rail 312 and is in threaded connection with the lead screw 315. The servo motor 313 is arranged on one side of the base 311 and is used to drive the lead screw 315 to rotate. During operation, the servo motor 313 drives the lead screw 315 to rotate, and the lead screw 315 drives the lifting seat 314 to slide along the guide rail 312.

[0052] The rotating component 32 includes a driving rotating shaft 321 and a second servo motor 322. The driving rotating shaft 321 is rotatably arranged in the lifting seat 314. The servo motor 313 is arranged on one side of the movable seat 5 and is used to drive the driving rotating shaft 321 to rotate. The rotating seat 2 is connected to the driving rotating shaft 321. During operation, the second servo motor 322 drives the driving rotating shaft 321 to rotate, and the driving rotating shaft 321 drives the rotating seat 2 to rotate.

[0053] In one embodiment, as Figure 1 shown, a translation device 8 is further included. The translation device 8 includes a linear slide 81 and a mounting seat 82. The mounting seat 82 is arranged at the working end of the linear slide 81, and the lifting and rotating device 3 is arranged on the mounting seat 82.

[0054] Specifically, in order to facilitate the removal and placement of the nozzle and the locking ring in the movable seat 5, a translation device 8 is further provided. The mounting seat 82 is arranged at the working end of the linear slide 81, the lifting and rotating device 3 is arranged at the bottom end of the mounting seat 82, the top of the driving rotating shaft 321 penetrates through the mounting seat 82, and the rotating seat 2 is mounted at the top end of the driving rotating shaft 321. The locking cylinder 44 is arranged on the top surface of the mounting seat 82. In order to ensure the stable and balanced operation of the mounting seat 82, in this embodiment, a slide rail 83 is arranged in parallel with the linear slide 81, and the mounting seat 82 is slidably connected to the slide rail 83.

[0055] It should be noted that the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope recorded in the description of the present invention; and for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all these improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A laser cutting head automatic nozzle replacement device, characterized in that: It includes a fixed seat, a rotating seat, a lifting and rotating device, a ceramic ring stabilizing device, a movable seat, a driving device and two clamping jaws, wherein the rotating seat is arranged at the working end of the lifting and rotating device, the fixed seat is arranged on the rotating seat, the ceramic ring stabilizing device is arranged at one side of the fixed seat, the movable seat is slidably arranged in the fixed seat, one end of which is provided with a nozzle accommodating portion, the two clamping jaws are symmetrically and elastically arranged on both sides of the fixed seat, the clamping ends of the two clamping jaws correspond to the nozzle accommodating portion, and the control ends thereof are respectively slidably connected with the movable seat, the driving device is arranged at one side of the fixed seat, and is used to drive the movable seat away from the rotating seat, and when the movable seat is away from the rotating seat, the clamping ends of the two clamping jaws are simultaneously driven to approach each other; The fixing seat is provided with a first accommodating cavity at the upper part and a second accommodating cavity at the lower part, and the first accommodating cavity and the second accommodating cavity are connected through a through hole; The movable seat is provided with a driving part at one end away from the nozzle accommodating part, a connecting part is provided between the driving part and the nozzle accommodating part, the connecting part is slidably connected to the through hole, the driving part is slidably connected to the second accommodating cavity, the nozzle accommodating part is slidably connected to the first accommodating cavity, and the control ends of the two clamping jaws are slidably connected to the driving part respectively; The driving device comprises a driving cylinder and a connecting rod, wherein the driving cylinder is arranged on one side of the fixed seat, and the connecting rod is rotatably arranged on the rotating seat, wherein the first end of the connecting rod is connected to the driving cylinder, and the second end of the connecting rod extends into the second accommodating cavity and abuts against the driving part; One end of the driving portion close to the nozzle accommodating portion is conical; The ceramic ring stabilization device includes a locking seat, a locking arm, a second elastic member and a locking cylinder. The locking seat is arranged on one side of the fixed seat, and the locking arm is rotatably arranged in the locking seat. A locking claw is arranged at the first end of the locking arm. The second elastic member connects the locking seat and the locking arm. The second elastic member is used to keep the first end of the locking arm close to the fixed seat. The locking cylinder is arranged on the outside of the lifting and rotating device, and a driving plate is arranged at the working end thereof, and the driving plate abuts against the second end of the locking arm.

2. The automatic nozzle replacement device for a laser cutting head according to claim 1, characterized in that: An elastic member is sleeved on the connecting portion, and the elastic member is used to keep the movable seat close to one side of the rotating seat.

3. The automatic nozzle replacement device for a laser cutting head according to claim 1, characterized in that: The lifting and rotating device comprises a lifting component and a rotating component, and the rotating component is arranged at the working end of the lifting component.

4. The automatic nozzle replacement device for a laser cutting head according to claim 1, characterized in that: It also includes a translation device, which includes a linear slide and a mounting seat. The mounting seat is arranged at the working end of the linear slide, and the lifting and rotating device is arranged on the mounting seat.

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