Annular laser cutting machine and use method

Abstract

A circular laser cutting machine comprises a fixed frame, a clamping assembly, a fixed seat, a cutting barrel and an optical fiber winding reel; the optical fiber winding reel is fixed on the top of the fixed frame; the cutting barrel is arranged on the top of the optical fiber winding reel; a fixed seat is arranged in the cutting barrel, and the fixed seat is used to clamp and fix the workpiece; the clamping assembly is arranged on the side of the fixed frame, and the clamping assembly is used to clamp the workpiece and place it or keep it away from the fixed seat; a rotating assembly is arranged below the fixed frame, and a through hole for connecting the rotating assembly with the cutting barrel is arranged in the middle of the optical fiber winding reel; the rotating assembly is transmission-connected to the cutting barrel, and the rotating assembly rotates to drive the cutting barrel to rotate, and when the cutting barrel rotates, the fixed seat remains stationary, and the fixed seat is kept from rotating during cutting. The cutting barrel rotates to cut the workpiece, and the fixed seat will not weaken the clamping force on the workpiece during cutting, which can ensure that the workpiece is cut smoothly and the cutting mouth is flat.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, in particular to a ring laser cutting machine and a use method thereof. Background Art

[0002] The current cutting machine clamps the workpiece, and a device for driving rotation is set under the workpiece. A laser device is set beside the workpiece to cut the workpiece. The workpiece is driven to rotate by the rotating device so that the workpiece is cut in a circular shape by the laser device. However, this cutting method is started by the self-rotation of the workpiece. A large number of sparks will be generated when cutting the workpiece, affecting the safety of bypass wires or workers. In addition, during self-rotation, the clamping force of the clamped workpiece is weakened, causing the cutting position of the workpiece to float up and down. Sometimes, a complete plane cannot be cut, which affects the assembly of the workpiece in the later stage. Summary of the invention

[0003] In view of the above-mentioned defects, the object of the present invention is to provide a ring laser cutting machine and a method of use.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A ring laser cutting machine includes a fixing frame, a clamping assembly, a fixing seat, a cutting barrel and an optical fiber winding reel;

[0006] The optical fiber winding reel is fixed above the fixing frame;

[0007] The cutting barrel is arranged above the optical fiber winding reel;

[0008] The fixing seat is arranged in the cutting barrel, and the fixing seat is used to clamp and fix the workpiece;

[0009] The clamping assembly is arranged beside the fixing frame, and the clamping assembly is used to clamp the workpiece and place it on or away from the fixing seat;

[0010] A rotating assembly is disposed below the fixed frame, and a through hole for connecting the rotating assembly with the cutting barrel is disposed in the middle of the optical fiber winding drum; the rotating assembly is transmission-connected with the cutting barrel, and the rotation of the rotating assembly drives the cutting barrel to rotate, and when the cutting barrel rotates, the fixed seat remains stationary.

[0011] Preferably, it further comprises a laser machine, wherein the laser machine is arranged on the barrel wall of the cutting barrel and faces the fixing seat;

[0012] The cutting barrel comprises a barrel body and a connecting portion below the barrel body, and the laser machine is arranged on the inner barrel wall of the barrel body;

[0013] A connecting column is provided below the bottom of the connecting part, the connecting column passes through the rotating assembly and is fixed to the fixing frame, a flange is connected to the outer side of the bottom of the connecting part, and the connecting part is transmission-connected to the rotating assembly via the flange.

[0014] Preferably, the rotating assembly comprises: a rotating motor, a rotating wheel and a connecting assembly, the rotating motor is drivingly connected to the rotating wheel, the rotating wheel is arranged on the top of the fixing frame, and the top of the rotating wheel is connected to the connecting assembly;

[0015] The connecting assembly includes a hollow cylinder, a support ring and a support column, the cylinder is fixedly connected to the top of the rotating wheel, the support ring is fixed to the edge of the cylinder, the support column is fixed to the top of the support ring, and the support column is fixedly connected to the flange; the connecting column passes through the connecting assembly and is located in the fixing frame with the rotating wheel.

[0016] Preferably, a plurality of groups of support rods are provided at the bottom of the optical fiber winding drum, the other ends of the support rods are fixed to the fixed frame, a guardrail is provided at the edge of the optical fiber winding drum, a guide plate is connected to the bottom of the support ring, and the extended edge of one side of the guide plate is against the guardrail.

[0017] Preferably, the fixing seat includes a connecting block, a connecting rod, a cylinder and a clamping rod, the connecting block is fixed to the connecting column, the connecting rod is fixedly connected to the connecting block, and multiple groups of connecting rods are connected end to end through connecting pieces, wherein the connecting rod located at the top is provided with the cylinder, a clamping block is provided on one side of the cylinder, a semicircular notch is opened in the clamping block, and the movable rod of the cylinder is vertically connected to the clamping rod, and the clamping rod faces the notch.

[0018] Preferably, the clamping assembly comprises: a base, a steering wheel, a swing arm and a clamp;

[0019] The base is arranged on the side of the fixing frame, a steering wheel is fixed on the top of the base, the swing arm is connected to the top of the steering wheel, and multiple groups of swing arms are hinged end to end, wherein the swing arm at the top is connected to the clamp, and the clamp includes a connecting arm, a steering head and a chuck, the steering head is hinged to the end of the swing arm, the steering head is transmission-connected to the connecting arm, and the chucks are arranged at both ends of the connecting arm, and the chucks are used to clamp the workpiece.

[0020] Preferably, a material taking port is provided on one side of the barrel body.

[0021] Preferably, a smoke and dust outlet pipe is provided in the fixing frame.

[0022] A method for annular cutting of a workpiece, comprising cutting using the annular laser cutting machine, and the specific steps are as follows:

[0023] Step 1: The clamping assembly clamps one end of the workpiece, fixes the other end of the workpiece to the fixing seat, adjusts the fixing seat, aligns the laser machine with the cutting position, rotates the rotating assembly to drive the laser machine to rotate, and cuts the workpiece into an upper part and a lower part;

[0024] Step 2: The clamping assembly clamps and removes the upper part of the workpiece, and the fixing seat fixes the lower part of the workpiece;

[0025] Step 3: The clamping assembly clamps the lower part of the workpiece from below the fixing seat and fixes it to the fixing seat to perform secondary cutting on the lower part of the workpiece;

[0026] Step 4: The clamping assembly clamps and removes the lower part of the workpiece, and the clamping assembly places the upper part of the workpiece into the fixing seat for fixing, and performs secondary cutting on the upper part of the workpiece.

[0027] The beneficial effects of the present invention are as follows: the fixing seat is kept from rotating during cutting, the cutting barrel rotates to cut the workpiece, and the fixing seat does not weaken the clamping force on the workpiece during cutting, thereby ensuring that the workpiece is cut smoothly and the cutting opening is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0029] Figure 2 It is a partial structural schematic diagram of an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention;

[0032] Figure 5 It is a schematic structural diagram of a fixing base in one embodiment of the present invention.

[0033] Among them: fixed frame 1, clamping assembly 2, base 2a, steering wheel 2b, swing arm 2c, clamp 2d, connecting arm 2da, steering head 2db, clamp 2dc, fixed seat 3, connecting block 3a, connecting rod 3b, cylinder 3c, clamping rod 3d, connecting piece 3e, clamping block 3f, notch 3fa, cutting barrel 4, barrel body 4a, connecting part 4b, flange 4c, connecting column 4d, laser machine 5, optical fiber winding reel 6, rotating assembly 7, rotating motor 7a, rotating wheel 7b, connecting assembly 7c, cylinder 7ca, support ring 7cb, support column 7cc, support rod 8, guide plate 9, extension 9a, material taking port 10, smoke outlet 11. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 5 As shown,

[0039] A ring laser cutting machine comprises a fixing frame 1, a clamping assembly 2, a fixing seat 3, a cutting barrel 4 and an optical fiber winding reel 6;

[0040] The optical fiber winding drum 6 is fixed above the fixing frame 1;

[0041] The cutting barrel 4 is arranged above the optical fiber winding reel 6;

[0042] The fixing seat 3 is arranged in the cutting barrel 4, and the fixing seat 3 is used to clamp and fix the workpiece;

[0043] The clamping assembly 2 is disposed beside the fixing frame 1, and the clamping assembly 2 is used to clamp the workpiece to be placed or away from the fixing seat 3;

[0044] A rotating assembly 7 is provided below the fixed frame 1, and a through hole for connecting the rotating assembly 7 with the cutting barrel 4 is provided in the middle of the optical fiber winding drum 6; the rotating assembly 7 is transmission-connected with the cutting barrel 4, and the rotation of the rotating assembly 7 drives the cutting barrel 4 to rotate, and when the cutting barrel 4 rotates, the fixed seat 3 remains stationary.

[0045] The current cutting machine clamps the workpiece, and a device for driving rotation is set under the workpiece. A laser device is set beside the workpiece to cut the workpiece. The workpiece is driven to rotate by the rotating device so that the workpiece is cut in a circular shape by the laser device. However, this cutting method is started by the self-rotation of the workpiece. A large number of sparks will be generated when cutting the workpiece, affecting the safety of bypass wires or workers. In addition, during self-rotation, the clamping force of the clamped workpiece is weakened, causing the cutting position of the workpiece to float up and down. Sometimes, a complete plane cannot be cut, which affects the assembly of the workpiece in the later stage.

[0046] The present invention fixes the laser machine 5 to the inner wall of the cutting barrel, and the cutting direction of the laser machine 5 is toward the fixed seat 3. The rotating assembly 7 under the fixed frame 1 is connected to the cutting barrel in a transmission manner. When the rotating assembly 7 is started, the cutting barrel 4 will rotate accordingly, and the laser machine 5 will rotate with the rotation of the cutting barrel 4 to cut the workpiece fixed on the fixed seat 3. Since the workpiece fixed by the fixed seat 3 does not move, and the laser machine 5 is subjected to a centripetal force when the cutting barrel 4 rotates, the laser machine 5 moves up and down, and the laser machine 5 can be welded in the cutting barrel 4 to strengthen the connection between the two, ensuring that the cutting surface can be complete and smooth during cutting. Moreover, the cutting barrel 4 wraps the fixed seat 3, which can effectively block the high-temperature debris during cutting. The safety of the side circuit is protected.

[0047] The present invention adopts a clamping assembly 2 to replace manual clamping of the workpiece. Since the temperature of the cut surface of the workpiece after cutting is high, the clamping assembly 2 does not need to wait for the workpiece to cool down, and the cut workpiece can be immediately set up. In addition, the clamping assembly 2, the laser machine 5 and the rotating assembly 7 can be controlled by the system to control the cutting time and the time of changing the clamped workpiece, thereby improving the work efficiency. The optical fiber winding drum 6 is provided with an optical fiber connecting line for connecting the rotating assembly 7 with the working system.

[0048] Preferably, it further comprises a laser machine 5, wherein the laser machine 5 is arranged on the barrel wall of the cutting barrel 4, and the laser machine 5 faces the fixing seat 3;

[0049] The cutting barrel 4 includes a barrel body 4a and a connecting portion 4b below the barrel body 4a, and the inner barrel wall of the barrel body 4a is provided with the laser machine 5;

[0050] A connecting column 4d is provided below the bottom of the connecting portion 4b, and the connecting column 4d passes through the rotating assembly 7 and is fixed to the fixing frame 1. A flange 4c is connected to the outer side of the bottom of the connecting portion 4b, and the connecting portion 4b is transmission-connected to the rotating assembly 7 via the flange 4c.

[0051] The cutting barrel 4 is transmission-connected to the rotating assembly 7 via the flange 4c, which can increase the flexibility of the device assembly. During maintenance or inspection, the cutting barrel 4 can be disassembled through the flange 4c to release the connection between the cutting barrel 4 and the rotating assembly 7.

[0052] Preferably, the rotating assembly 7 comprises: a rotating motor 7a, a rotating wheel 7b and a connecting assembly 7c, wherein the rotating motor 7a is transmission-connected to the rotating wheel 7b, the rotating wheel 7b is arranged on the top of the fixing frame 1, and the top of the rotating wheel 7b is connected to the connecting assembly 7c;

[0053] The connecting assembly 7c includes a hollow cylinder 7ca, a support ring 7cb and a support column 7cc, the cylinder 7ca is fixedly connected to the top of the rotating wheel 7b, the support ring 7cb is fixed to the edge of the cylinder 7ca, the support column 7cc is fixed to the top of the support ring 7cb, and the support column 7cc is fixedly connected to the flange 4c; the connecting column 4d passes through the connecting assembly 7c and the rotating wheel 7b and is located in the fixing frame 1.

[0054] When the driving device is started, the rotating motor 7a drives the rotating wheel 7b to rotate. The rotating wheel 7b is a combination of multiple gears, which can reduce the speed of the rotating motor 7a and increase the torque. Due to the large size and weight of the cutting barrel 4, a higher speed cannot effectively drive the cutting barrel to rotate.

[0055] The cylinder 7ca in the connecting assembly 7c is a hollow structure, and the connecting column 4d can pass through the cylinder 7ca to reach the fixing frame 1. The fixing seat 3 can be fixed by the connecting column 4d during cutting.

[0056] Preferably, a plurality of support rods 8 are provided at the bottom of the optical fiber winding drum 6, the other ends of the support rods 8 are fixed to the fixed frame 1, a guardrail is provided at the edge of the optical fiber winding drum 6, a guide plate 9 is connected to the bottom of the support ring 7cb, and an extended edge 9a on one side of the guide plate 9 is against the guardrail.

[0057] The support rod 8 supports the optical fiber winding drum 6 to prevent the optical fiber winding drum 6 from connecting and contacting with the rotating wheel 7b. When the device is started, the rotating wheel 7b drives the optical fiber winding drum 6 to rotate, so that the wire wound in the optical fiber winding drum 6 flies out due to the centrifugal force of rotation.

[0058] The extended edge 9a of the guide plate 9 abuts against the guardrail, and the supporting force of the guardrail can help the guide plate 9 to offset a part of the centrifugal force during rotation, so that the cutting barrel 4 can rotate more smoothly.

[0059] Preferably, the fixing seat 3 includes a connecting block 3a, a connecting rod 3b, a cylinder 3c and a clamping rod 3d, the connecting block 3a is fixed to the connecting column 4d, the connecting rod 3b is fixedly connected to the connecting block 3a, and a plurality of groups of connecting rods 3b are connected end to end through a connecting piece 3e, wherein the connecting rod 3b located at the top is provided with the cylinder 3c, a clamping block 3f is provided on one side of the cylinder 3c, a semicircular notch 3fa is opened on the clamping block 3f, and the movable rod of the cylinder 3c is vertically connected to the clamping rod 3d, and the clamping rod 3d faces the notch 3fa.

[0060] like Figure 5 As shown, the connecting block 3a is provided with a screw hole, and the connecting block 3a can be fixed to the surface of the connecting column 4d through the screw hole, and then the cylinder 3c can be located near the laser machine 5 through the connection of multiple groups of connecting rods 3b, so that the workpiece can be cut by the laser machine 5 when it is clamped. By using the end-to-end connection of multiple groups of connecting rods 3b, the height of workpieces of different sizes during cutting can be controlled. Since the connecting column 4d is fixed, the fixing seat 3 will not rotate when the cutting barrel 4 rotates.

[0061] Before clamping the workpiece, the cylinder 3c is in a started state, and the movable rod of the cylinder 3c is extended. When the workpiece is placed in the notch 3fa, the cylinder 3c is started, and the cylinder 3c will retract the movable rod, and the clamping rod 3d on the movable rod will translate toward the notch 3fa to clamp the workpiece.

[0062] Preferably, the clamping assembly 2 comprises: a base 2a, a steering wheel 2b, a swing arm 2c and a clamp 2d;

[0063] The base 2a is arranged on the side of the fixed frame 1, and a steering wheel 2b is fixed on the top of the base 2a. The swing arm 2c is connected to the top of the steering wheel 2b. The multiple groups of swing arms 2c are hinged at the head and tail, and the top swing arm 2c is connected to the clamp 2d. The clamp 2d includes a connecting arm 2da, a steering head 2db and a chuck 2dc. The steering head 2db is hinged to the end of the swing arm 2c, and the steering head 2db is transmission-connected to the connecting arm 2da. The chuck 2dc is provided at both ends of the connecting arm 2da, and the chuck 2dc is used to clamp the workpiece.

[0064] The steering wheel 2b can turn horizontally, driving the swing arm 2c to rotate left and right. The swing arms 2c are hinged to each other to improve the flexibility of the swing arm 2c in the vertical direction and the length of the clamping contact. The steering head 2db can rotate the connecting arm 2da, so that the connecting arm 2da can rotate 360 ​​degrees. Both ends of the connecting arm 2da are provided with a chuck 2dc. The chuck 2dc cooperates with the connecting arm 2da to increase the service range of the clamping assembly 2, such as one chuck 2dc serves one cutting barrel 4, reducing the cost of use.

[0065] Preferably, a material taking port 10 is provided on one side of the barrel body 4a.

[0066] The material taking port 10 can increase the material taking channel of the clamping assembly 2. In addition to cutting the top of the barrel 4 to take materials, materials can also be taken at the material taking port 10. The material taking port 10 is located at a lower position. When the clamping assembly 2 fails, the workpiece can be placed manually from the material taking port 10.

[0067] Preferably, a smoke and dust outlet pipe 11 is provided in the fixing frame 1 .

[0068] The high-temperature debris dropped during cutting may fall into the smoke and dust outlet pipe 11, and an exhaust fan may be provided in the smoke and dust outlet pipe 11 to increase the discharge efficiency of the debris.

[0069] A method for annular cutting of a workpiece, comprising cutting using the annular laser cutting machine, and the specific steps are as follows:

[0070] Step 1: The clamping assembly 2 clamps one end of the workpiece, fixes the other end of the workpiece to the fixing seat 3, adjusts the fixing seat 3, aligns the laser machine 5 with the cutting position, and rotates the rotating assembly 7 to drive the laser machine 5 to rotate, so as to cut the workpiece into an upper part and a lower part;

[0071] Step 2: The clamping assembly 2 clamps and removes the upper part of the workpiece, and the fixing seat 3 fixes the lower part of the workpiece;

[0072] Step 3: The clamping assembly 2 clamps the lower part of the workpiece from below the fixing seat 3 and fixes it to the fixing seat 3 to perform secondary cutting on the lower part of the workpiece;

[0073] Step 4: The clamping assembly 2 clamps and removes the lower part of the workpiece, and the clamping assembly 2 places the upper part of the workpiece into the fixing seat 3 to fix it, and performs secondary cutting on the upper part of the workpiece.

[0074] Since the fixed seat 3 in the prior art is rotating, the clamping assembly 2 cannot clamp the workpiece being cut, resulting in the workpiece falling on the ground after cutting. The workpiece can only be picked up manually and placed in the area recognized by the clamping assembly 2, and then the clamping assembly 2 picks up the workpiece again and puts it on the fixed seat 3 for cutting. In the present invention, the fixed seat 3 is fixed to the connecting column, and the cutting barrel is connected to the rotating assembly. During cutting, the cutting barrel rotates, while the fixed seat 3 remains stationary, so the clamping assembly 2 can clamp the workpiece during cutting to prevent the workpiece from falling. In addition, the present invention is provided with two sets of chucks 2dc on the clamping assembly 2, and one chuck 2dc can clamp the workpiece during the first cutting to prevent it from falling. After the first cutting is completed, the steering head 2db rotates, and another chuck 2dc is used to clamp the lower part of the workpiece and adjust its cutting position. After the cutting of the lower part of the workpiece is completed, the chuck 2dc is used to remove the lower part of the workpiece, and the chuck 2dc that clamps the upper part of the workpiece is used to place the upper part of the workpiece into the fixed seat 3 for fixation, and the upper part of the workpiece is cut for the second time.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A ring laser cutting machine, characterized in that: It comprises a fixing frame (1), a clamping assembly (2), a fixing seat (3), a cutting barrel (4) and an optical fiber winding reel (6); The optical fiber winding reel (6) is fixed above the fixing frame (1); The cutting barrel (4) is arranged above the optical fiber winding reel (6); The fixing seat (3) is arranged in the cutting barrel (4), and the fixing seat (3) is used to clamp and fix the workpiece; The clamping assembly (2) is arranged beside the fixing frame (1), and the clamping assembly (2) is used to clamp the workpiece and place it on or away from the fixing seat (3); A rotating assembly (7) is arranged below the fixed frame (1), and a through hole for connecting the rotating assembly (7) with the cutting barrel (4) is arranged in the middle of the optical fiber winding drum (6); the rotating assembly (7) is connected to the cutting barrel (4) in a transmission manner, and the rotating assembly (7) drives the cutting barrel (4) to rotate, and when the cutting barrel (4) rotates, the fixed seat (3) remains stationary; It also includes a laser machine (5), wherein the laser machine (5) is arranged on the barrel wall of the cutting barrel (4), and the laser machine (5) faces the fixing seat (3); The cutting barrel (4) comprises a barrel main body (4a) and a connecting portion (4b) below the barrel main body (4a), and the laser machine (5) is provided on the inner barrel wall of the barrel main body (4a); A connecting column (4d) is provided below the bottom of the connecting portion (4b), the connecting column (4d) passes through the rotating assembly (7) and is fixed to the fixing frame (1), a flange (4c) is connected to the outer side of the bottom of the connecting portion (4b), and the connecting portion (4b) is drivingly connected to the rotating assembly (7) via the flange (4c); The fixing seat (3) comprises a connecting block (3a), a connecting rod (3b), a cylinder (3c) and a clamping rod (3d), wherein the connecting block (3a) is fixed to the connecting column (4d), the connecting rod (3b) is fixedly connected to the connecting block (3a), a plurality of groups of connecting rods (3b) are connected end to end via a connecting piece (3e), wherein the connecting rod (3b) located at the top is provided with the cylinder (3c), a clamping block (3f) is provided on one side of the cylinder (3c), a semicircular notch (3fa) is provided on the clamping block (3f), and a movable rod of the cylinder (3c) is vertically connected to the clamping rod (3d), and the clamping rod (3d) faces the notch (3fa); The clamping assembly (2) comprises: a base (2a), a steering wheel (2b), a swing arm (2c) and a clamp (2d); The base (2a) is arranged on the side of the fixed frame (1), a steering wheel (2b) is fixed on the top of the base (2a), the swing arm (2c) is connected to the top of the steering wheel (2b), and multiple groups of swing arms (2c) are hinged at the head and tail, wherein the swing arm (2c) at the top is connected to the clamp (2d), and the clamp (2d) includes a connecting arm (2da), a steering head (2db) and a chuck (2dc), the steering head (2db) is hinged to the end of the swing arm (2c), the steering head (2db) is transmission-connected to the connecting arm (2da), and the chuck (2dc) is arranged at both ends of the connecting arm (2da), and the chuck (2dc) is used to clamp a workpiece.

2. A ring laser cutting machine according to claim 1, characterized in that: The rotating assembly (7) comprises: a rotating motor (7a), a rotating wheel (7b) and a connecting assembly (7c); the rotating motor (7a) is drivingly connected to the rotating wheel (7b); the rotating wheel (7b) is arranged on the top of the fixing frame (1); and the top of the rotating wheel (7b) is connected to the connecting assembly (7c); The connecting assembly (7c) comprises a hollow cylinder (7ca), a support ring (7cb) and a support column (7cc); the cylinder (7ca) is fixedly connected to the top of the rotating wheel (7b); the support ring (7cb) is fixed to the edge of the cylinder (7ca); the support column (7cc) is fixed to the top of the support ring (7cb); the support column (7cc) is fixedly connected to the flange (4c); the connecting column (4d) passes through the connecting assembly (7c) and the rotating wheel (7b) and is located in the fixing frame (1).

3. A ring laser cutting machine according to claim 2, characterized in that: A plurality of groups of support rods (8) are arranged at the bottom of the optical fiber winding drum (6), the other ends of the support rods (8) are fixed to the fixed frame (1), a guardrail is arranged at the edge of the optical fiber winding drum (6), a guide disk (9) is connected to the bottom of the support ring (7cb), and an extended edge (9a) on one side of the guide disk (9) abuts against the guardrail.

4. The ring laser cutting machine according to claim 2, characterized in that: A material taking port (10) is provided on one side of the barrel body (4a).

5. The ring laser cutting machine according to claim 2, characterized in that: A smoke and dust outlet pipe (11) is arranged inside the fixing frame (1).

6. A method for annular cutting of a workpiece, characterized in that: The method comprises cutting using a circular laser cutting machine as claimed in any one of claims 1 to 5, wherein the specific steps are as follows: Step 1: The clamping assembly clamps one end of the workpiece, fixes the other end of the workpiece to the fixing seat, adjusts the fixing seat, aligns the laser machine with the cutting position, rotates the rotating assembly to drive the laser machine to rotate, and cuts the workpiece into an upper part and a lower part; Step 2: The clamping assembly clamps and removes the upper part of the workpiece, and the fixing seat fixes the lower part of the workpiece; Step 3: The clamping assembly clamps the lower part of the workpiece from below the fixing seat and fixes it to the fixing seat to perform secondary cutting on the lower part of the workpiece; Step 4: The clamping assembly clamps and removes the lower part of the workpiece, and the clamping assembly places the upper part of the workpiece into the fixing seat for fixing, and performs secondary cutting on the upper part of the workpiece.

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