Cold-bent circular steel laser cutting device

Abstract

The utility model discloses a laser cutting device for cold-bent circular steel. The laser cutting device comprises a base, a feeding device, a clamping and rotating device, a laser cutting device and an adjustable abutting device. The feeding device is accurate in feeding; the clamping and rotating device utilizes a pneumatic chuck and a rotating motor to ensure that the steel is clamped and stably rotated; the laser cutting device emits a laser beam for high-precision cutting; the adjustable abutting device assists in supporting the steel, and the cutting precision is guaranteed. In addition, the base is provided with a blanking cavity and a blanking plate, so that waste and finished products are convenient to collect. Compared with cutting of a traditional mechanical saw, the device is high in cutting precision, smooth in cutting face, high in material utilization rate, high in machining efficiency, capable of greatly reducing chippings and noise pollution and widely suitable for the field of cold-bent round steel machining.

Description

Technical Field

[0001] This utility model relates to the field of cold-bending steel processing technology, specifically to a laser cutting device for cold-bending circular steel. Background Technology

[0002] In the processing of cold-formed round steel, traditional mechanical sawing methods have long dominated. However, with the increasing demands of modern industry for processing quality, efficiency, and environmental protection, its drawbacks have become increasingly apparent.

[0003] When traditional mechanical saws cut cold-bent round steel, the high-speed rotation of the saw blade and the intense friction with the steel inevitably generate a large amount of debris. This debris flies everywhere, not only accumulating around the processing equipment, affecting the cleanliness of the site and increasing cleaning costs, but also potentially mixing into the steel being processed, causing surface scratches and reducing product quality. Moreover, the subsequent collection and treatment of debris is cumbersome, further consuming manpower and material resources.

[0004] Meanwhile, the mechanical sawing process generates significant noise pollution. The sharp, piercing sound of the saw blade cutting steel can cause irreversible hearing damage to operators with prolonged exposure. Furthermore, the high-decibel noise interferes with communication in surrounding work areas, reduces work efficiency, and may even violate increasingly stringent industrial noise emission standards, posing potential environmental violations to businesses. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The technical problem this invention aims to solve is the problem of the large amount of debris and noise generated by traditional mechanical saw cutting.

[0007] (II) Technical Solution

[0008] To solve the above problems, this utility model provides the following technical solution:

[0009] A laser cutting device for cold-bent circular steel includes a base, a feeding device, a clamping and rotating device, a laser cutting device, and an adjustable support device.

[0010] The feeding device and the adjustable abutment device are respectively disposed on both sides of the upper end face of the base, and the clamping and rotating device is disposed between the laser cutting devices;

[0011] The base is also provided with a material discharge chamber, and a material discharge plate is provided in the material discharge chamber. The material discharge chamber is located at the lower part of the laser cutting device and the adjustable abutment device.

[0012] Furthermore, the feeding device includes a feeding component one, a feeding component two, and a set of linear guide rail pairs, wherein the feeding component one and the feeding component two are symmetrically arranged;

[0013] The feeding assembly includes a load-bearing base plate, a pushing cylinder, a drive motor, a motor mounting base, a main pulley, and two pressure rollers symmetrically arranged on the load-bearing base plate. The load-bearing base plate is connected to the sliders on the two linear guide pairs. The cylinder body of the pushing cylinder is fixedly mounted on the upper end face of the base through a cylinder connecting seat, and its lifting rod is fixedly connected to the load-bearing base plate. The drive motor is fixedly mounted on the load-bearing base plate through a motor mounting base, and the main pulley is mounted on the shaft of the drive motor. Both pressure rollers are connected to the upper end face of the load-bearing base plate through a belt bearing seat, and each of the two pressure rollers has a secondary pulley at its lower part. The two secondary pulleys are connected to the main pulley through a belt.

[0014] The second feeding assembly includes a second load-bearing base plate, a second pushing cylinder, a cylinder mounting base plate, and two second pressure rollers. The second load-bearing base plate is connected to the sliders on the two linear guide rail pairs, and the two second pressure rollers are mounted on the second load-bearing base plate via shaft bearing seats. The cylinder mounting base plate is fixedly mounted on the end of the linear guide rail pair away from the first feeding assembly. The second pushing cylinder is fixedly mounted on the cylinder mounting base plate, and the telescopic rod of the second pushing cylinder is fixedly connected to the side of the second load-bearing base plate.

[0015] Furthermore, the clamping and rotating device includes a column plate with a circular hole, a collar, a synchronous pulley, a pneumatic chuck, and a rotary motor. The column plate is fixedly mounted on the upper surface of the base. The collar is connected to the column plate via a bearing. One end face of the synchronous pulley is fixedly connected to one side of the collar, and the other end face is fixedly connected to the pneumatic chuck. The rotary motor is fixedly mounted on the upper surface of the base, and its rotating shaft is connected to the synchronous pulley via a synchronous belt. A guide ring is provided on the side of the column plate away from the collar. The guide ring, the circular hole on the column plate, the collar, the synchronous pulley, and the pneumatic chuck are all coaxially arranged.

[0016] Furthermore, the laser cutting device includes a support member and a laser cutting head, the support member being fixedly disposed on the upper surface of the base and the laser cutting head being fixedly disposed on the support member.

[0017] Furthermore, the adjustable abutting device includes a set of symmetrically arranged slide rods, an abutting member disposed on the slide rods, and an adjustable pulling member disposed on the slide rods;

[0018] The two ends of the two slide rods are fixedly mounted on the upper surface of the base through open clamping blocks. A gap is left between the two slide rods to facilitate the falling of cold-bent round steel into the blanking chamber. The abutting component includes an abutting plate and an abutting block. The abutting plate is connected to the two slide rods respectively through two sliding sleeves. The abutting block has a circular cross-section and is fixedly mounted on the side of the abutting plate near the laser cutting device. The abutting block is coaxially arranged with the collar. The adjustable pulling component includes a pulling cylinder and a pulling cylinder connecting seat. The cylinder body of the pulling cylinder is fixedly connected to the pulling cylinder connecting seat. The pulling cylinder connecting seat is connected to the two slide rods through a slider with a locking mechanism, and the telescopic rod of the pulling cylinder is fixedly connected to the abutting plate.

[0019] Furthermore, the guide ring is also provided with a tapered inclined surface.

[0020] Furthermore, a support roller component is provided between the clamping rotation device and the feeding device. The support roller component includes a support wheel, a U-shaped mounting bracket and a connecting plate. The U-shaped mounting bracket is fixedly mounted on the connecting plate, and the support wheel is connected to the U-shaped mounting bracket through a shaft bearing.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of this utility model are:

[0023] Compared with traditional mechanical sawing, this invention uses laser cutting to cut steel, which effectively reduces the amount of debris and noise generated during the cutting process and reduces pollution to the production site. At the same time, the adjustable feeding device can automatically feed and unload materials, reducing the cost of manual handling and improving the efficiency of cutting and collection. Attached image description:

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a schematic diagram of the feeding device of this utility model;

[0026] Figure 3 This is a structural schematic diagram of the clamping and rotating device and the supporting roller component of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the laser cutting device and the adjustable support device of this utility model;

[0028] Figure 5 This is a structural schematic diagram of the supporting component and the adjustable pulling component of this utility model.

[0029] Marked in the image:

[0030] 1-Base;

[0031] 2-Feeding device, 201-Feeding assembly one, 201a-Bearing base plate one, 201b-Push cylinder one, 201c-Drive motor, 201d-Motor mounting base, 201e-Main pulley, 201f-Pressure roller one, 201g-Auxiliary pulley, 202-Feeding assembly two, 202a-Bearing base plate two, 202b-Push cylinder two, 202c-Cylinder mounting base plate, 202d-Pressure roller two, 203-Linear guide rail pair;

[0032] 3-Clamping and rotating device, 301-Column plate, 302-Collar, 303-Synchronous pulley, 304-Pneumatic chuck, 305-Rotary motor, 306-Guide ring, 307-Conical inclined surface;

[0033] 4-Laser cutting device, 401-Support component, 402-Laser cutting head;

[0034] 5-Adjustable abutment device, 501-Slide rod, 502-Abutment component, 502a-Abutment upright plate, 502b-Abutment block, 503-Adjustable pulling component, 503a-Pulling cylinder, 503b-Pulling cylinder connecting seat;

[0035] 6-Feeding chamber;

[0036] 7- Blanking plate;

[0037] 8-Support roller assembly, 801-Support wheel, 802-U-shaped mounting bracket, 803-Connecting plate. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Please see Figures 1-5 The image shows a laser cutting device for cold-bent circular steel, with an overall structure.

[0041] This utility model discloses a laser cutting device for cold-bent circular steel, comprising a base 1, a feeding device 2, a clamping and rotating device 3, a laser cutting device 4, and an adjustable abutment device 5. The feeding device 2 and the adjustable abutment device 5 are respectively located on both sides of the upper surface of the base 1 for feeding the cold-bent circular steel. The clamping and rotating device 3 is positioned between the laser cutting devices 4, responsible for fixing and rotating the steel to ensure it can be laser-cut from all angles, guaranteeing the integrity and precision of the cut. The base 1 also has a discharge chamber 6, and a discharge plate 7 is provided within the discharge chamber 6. The discharge chamber 6 is located below the laser cutting device 4 and the adjustable abutment device 5, facilitating the collection of waste and finished products after cutting, improving the cleanliness and safety of the processing area.

[0042] The feeding device 2 includes a first feeding component 201, a second feeding component 202, and a set of linear guide rail pairs 203. The first feeding component 201 and the second feeding component 202 are arranged symmetrically.

[0043] The feeding assembly 201 includes a load-bearing base plate 20a, a pushing cylinder 20b, a drive motor 20c, a motor mounting base 20d, a main pulley 20e, and two pressure rollers 20f symmetrically arranged on the load-bearing base plate 20a. The load-bearing base plate 20a is connected to sliders on two linear guide rail pairs 203. The sliding of the sliders on the guide rails ensures the accuracy of the feeding direction. The cylinder body of the pushing cylinder 20b is fixedly mounted on the upper end face of the base 1 via a cylinder connecting seat. Its telescopic rod is fixedly connected to the load-bearing base plate 201a. The pushing cylinder 201b controls the forward and backward movement of the feeding assembly 201, enabling it to cooperate with the feeding assembly 202 to clamp materials and provide propulsion force. The drive motor 201c is fixedly mounted on the load-bearing base plate 201a via the motor mounting base 201d. Furthermore, the main pulley 201e is mounted on the shaft of the drive motor 201c. Both pressure rollers 201f are connected to the upper end face of the load-bearing base plate 201a via a belt bearing seat. Each of the two pressure rollers 201f has a secondary pulley 201g at its lower part. The two secondary pulleys 201g are connected to the main pulley 201e via a belt. When the drive motor 201c starts, it drives the main pulley 201e to rotate. The secondary pulleys 201g and pressure rollers 201f rotate by means of belt transmission. The material is fed by the friction between the pressure rollers 201f and 202d and the steel.

[0044] The second feeding assembly 202 includes a load-bearing base plate 202a, a push cylinder 202b, a cylinder mounting base plate 202c, and two pressure rollers 202d. The load-bearing base plate 202a is connected to the sliders on the two linear guide pairs 203 to ensure stable feeding. The two pressure rollers 202d are mounted on the load-bearing base plate 202a via shaft bearing seats. The cylinder mounting base plate 202c is fixedly mounted at the end of the linear guide pair 203 away from the first feeding assembly 201. The push cylinder 202b is fixedly mounted on the cylinder mounting base plate 202c, and the telescopic rod of the push cylinder 202b is fixedly connected to the side of the load-bearing base plate 202a. The push cylinder 202b can adjust the position of the second feeding assembly 202 to adapt to the feeding requirements of different specifications of steel in conjunction with the first feeding assembly 201. The two pressure rollers 202d also play a role in assisting feeding and stabilizing the steel.

[0045] The clamping and rotating device 3 includes a column plate 301 with a circular hole, a collar 302, a synchronous pulley 303, a pneumatic chuck 304, and a rotary motor 305. The column plate 301 is fixedly mounted on the upper surface of the base 1, supporting the entire device. The collar 302 is connected to the column plate 301 via bearings, ensuring its flexible rotation. One end of the synchronous pulley 303 is fixedly connected to one side of the collar 302, and the other end is fixedly connected to the pneumatic chuck 304. The rotary motor 305 is fixedly mounted on the upper surface of the base 1, and its shaft is connected to the synchronous pulley 303 via a synchronous belt. When the rotary motor 305 starts... The synchronous belt drive drives the synchronous pulley 303, collar 302, and pneumatic chuck 304 to rotate, thereby realizing the rotation of the steel and facilitating the laser cutting device 4 to cut the steel from all directions. A guide ring 306 is provided on the side of the column plate 301 away from the collar 302. The guide ring 306, the round hole on the column plate 30, the collar 302, the synchronous pulley 303, and the pneumatic chuck 304 are all set on the same axis. The guide ring 306 is used to guide the steel to accurately enter the pneumatic chuck 304 to ensure accurate clamping position.

[0046] The laser cutting device 4 includes a support member 40 and a laser cutting head 402. The support member 40 is fixedly installed on the upper surface of the base 1 to provide stable support for the laser cutting head 402 and ensure that the position of the laser cutting head 402 is fixed during the cutting process. The laser cutting head 402 is fixedly installed on the support member 40 and emits a laser beam to cut the cold-bent round steel that is fixed and rotated by the clamping and rotating device 3. Its high-precision cutting capability can meet the cutting needs of complex shapes.

[0047] The adjustable abutment device 5 includes a set of symmetrically arranged slide rods 501, an abutment member 502 disposed on the slide rods 501, and an adjustable tension member 503 disposed on the slide rods 501.

[0048] The two ends of the two slide rods 501 are fixedly set on the upper surface of the base 1 through the open clamping clamp block to ensure the stability of the device. A gap is left between the two slide rods 501 to facilitate the cold-bent round steel to fall into the material discharge chamber 6, so that the cut steel can be discharged smoothly.

[0049] The abutment component 502 includes an abutment plate 502a and an abutment block 502b. The abutment plate 502a is connected to two slide rods 501 via two sliding sleeves, allowing it to slide and adjust its position on the slide rods 501. The abutment block 502b has a circular cross-section and is fixedly installed on the side of the abutment plate 502a near the laser cutting device 4. The abutment block 502b is coaxially arranged with the collar 302. During feeding and cutting, the abutment block 502b can provide auxiliary support and positioning for the steel, preventing the steel from shifting.

[0050] The adjustable pulling component 503 includes a pulling cylinder 503a and a pulling cylinder connecting seat 503b. The cylinder body of the pulling cylinder 503a is fixedly connected to the pulling cylinder connecting seat 503b. The pulling cylinder connecting seat 503b is connected to two slide rods 50 through a slider with a locking mechanism, so that it can slide and adjust on the slide rods 50. The telescopic rod of the pulling cylinder 503a is fixedly connected to the support plate 502a. The pulling cylinder 503a can drive the support plate 502a and the support block 502b to move to adapt to the cutting requirements of different lengths.

[0051] The guide ring 306 is also provided with a tapered inclined surface 307. The tapered inclined surface 307 can better guide the steel into the guide ring 306 and the subsequent clamping and rotating device 3, reduce the jamming of the steel in the feeding process, and improve the feeding efficiency and accuracy.

[0052] A support roller assembly 8 is also provided between the clamping rotation device 3 and the feeding device 2. The support roller assembly 8 includes a support wheel 801, a U-shaped mounting bracket 802, and a connecting plate 803. The U-shaped mounting bracket 802 is fixedly mounted on the connecting plate 803, and the support wheel 801 is connected to the U-shaped mounting bracket 802 via a shaft bearing. When the steel transitions from the feeding device 2 to the clamping rotation device 3, the support wheel 801 provides auxiliary support, preventing the steel from sagging due to its own weight and affecting the feeding accuracy and stability, thus ensuring that the steel can smoothly enter the clamping rotation device 3.

[0053] Working principle:

[0054] In their initial state, the feeding components 201 and 202 of the feeding device are positioned according to the length of the cold-bent round steel to be cut, using the push cylinders 20b and 202b respectively. The extension rod of the push cylinder 20b extends and retracts, causing the fixedly connected load-bearing base plate 201a to slide on the slider of the linear guide pair 203, thereby precisely adjusting the front-to-back position of the feeding component 201. Similarly, the push cylinder 202b drives the load-bearing base plate 202a to move, allowing the feeding component 202 to adapt to the length of the steel in coordination with the feeding component 201, ensuring that both ends of the steel are effectively clamped.

[0055] Once ready, the drive motor 201c starts, and its shaft drives the main pulley 201e to rotate. Since the main pulley 201e is connected to the auxiliary pulleys 201g below the two pressure rollers 201f via a belt, the auxiliary pulleys 201g and the pressure rollers 201f rotate synchronously under the belt drive. At this time, the cold-formed round steel is placed between the two pressure rollers 201f of the feeding assembly 201 and the two pressure rollers 202d of the feeding assembly 202. The pressure rollers 201f and 202d, relying on friction with the steel surface, push the steel forward, achieving stable feeding.

[0056] As the steel is pushed, its front end approaches the clamping rotating device 3. At this time, the guide ring 306 on the column plate 301 plays a key role, especially the tapered inclined surface 307 on the guide ring 306. With its gradually narrowing structure, it guides the steel to move accurately toward the center of the circular hole in the column plate 30, reducing the deviation when the steel enters and ensuring the accuracy of the subsequent clamping position.

[0057] The steel continues to move forward and enters the pneumatic chuck 304. Driven by the air source, the jaws of the pneumatic chuck 304 retract inward, tightly clamping the steel and preventing it from shifting during subsequent cutting. At the same time, the collar 302 is connected to the column plate 301 via bearings, ensuring flexibility during rotation and laying the foundation for omnidirectional rotary cutting of the steel.

[0058] Once the steel is clamped by the pneumatic chuck 304, the rotary motor 305 starts. The shaft of the rotary motor 305 is connected to the synchronous pulley 303 via a synchronous belt. One end of the synchronous pulley 303 is fixedly connected to the collar 302, and the other end is connected to the pneumatic chuck 304. Therefore, when the rotary motor 305 drives the synchronous pulley 303 to rotate, the collar 302 and the clamped steel rotate synchronously.

[0059] At the same time, the laser cutting head 402 of the laser cutting device 4 is activated, emitting a high-energy-density laser beam. As the steel continues to rotate, the laser cutting head 402 cuts the steel.

[0060] Throughout the feeding, clamping, and cutting process, the adjustable abutment device 5 continuously provides auxiliary support and positioning. The extension and retraction of the traction cylinder 503a causes the abutment plate 502a to slide on the slide rod 501 via the sliding sleeve, thereby adjusting the position of the abutment block 502b to ensure that it is always in close contact with the steel surface. This prevents the steel from shifting due to uneven force or vibration during processing, thus ensuring cutting accuracy.

[0061] After cutting, the steel falls into the discharge chamber 6 under its own weight. The discharge plate 7 in the discharge chamber 6 acts as a buffer to prevent the steel from directly impacting the base 1 and causing damage. It also facilitates the subsequent collection and cleaning of waste and finished products.

[0062] For clarity only, those skilled in the art should consider the specification as a whole, and the technical solutions in the various embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cold-bending round steel laser cutting device, characterized in that: It includes a base (1), a feeding device (2), a clamping and rotating device (3), a laser cutting device (4), and an adjustable abutment device (5); The feeding device (2) and the adjustable abutment device (5) are respectively disposed on both sides of the upper end face of the base (1), and the clamping rotation device (3) is disposed between the laser cutting device (4); The base (1) is also provided with a material discharge cavity (6), and a material discharge plate (7) is provided in the material discharge cavity (6). The material discharge cavity (6) is located at the lower part of the laser cutting device (4) and the adjustable abutment device (5).

2. A laser cutting device for cold rolled circular steel as claimed in claim 1, wherein: The feeding device (2) includes a feeding component one (201), a feeding component two (202) and a set of linear guide rail pairs (203), wherein the feeding component one (201) and the feeding component two (202) are symmetrically arranged; The feeding assembly (201) includes a load-bearing base plate (201a), a push cylinder (201b), a drive motor (201c), a motor mounting base (201d), a main pulley (201e), and two pressure rollers (201f) symmetrically arranged on the load-bearing base plate (201a). The load-bearing base plate (201a) is connected to the sliders on the two linear guide pairs (203), and the cylinder body of the push cylinder (201b) is fixedly mounted on the upper end face of the base (1) through a cylinder connecting seat. Its lifting rod is connected to the load-bearing base plate (201a). The drive motor (201c) is fixedly mounted on the load-bearing base plate (201a) via a motor mounting base (201d), and the main pulley (201e) is mounted on the shaft of the drive motor (201c). The two pressure rollers (201f) are connected to the upper end face of the load-bearing base plate (201a) via a belt bearing seat. Each of the two pressure rollers (201f) is provided with a secondary pulley (201g) at its lower part. The two secondary pulleys (201g) are connected to the main pulley (201e) via a belt. The second feeding assembly (202) includes a second load-bearing base plate (202a), a second pushing cylinder (202b), a cylinder mounting base plate (202c), and two second pressure rollers (202d). The second load-bearing base plate (202a) is connected to the sliders on the two linear guide pairs (203), and the two second pressure rollers (202d) are mounted on the second load-bearing base plate (202a) via shaft bearing seats. The cylinder mounting base plate (202c) is fixedly mounted at one end of the linear guide pair (203) away from the first feeding assembly (201). The second pushing cylinder (202b) is fixedly mounted on the cylinder mounting base plate (202c), and the telescopic rod of the second pushing cylinder (202b) is fixedly connected to the side of the second load-bearing base plate (202a).

3. A laser cutting device for cold rolled circular steel as claimed in claim 2, wherein: The clamping and rotating device (3) includes a column plate (301) with a circular hole, a collar (302), a synchronous pulley (303), a pneumatic chuck (304), and a rotary motor (305). The column plate (301) is fixedly mounted on the upper surface of the base (1). The collar (302) is connected to the column plate (301) through a bearing. One end face of the synchronous pulley (303) is fixedly connected to one side face of the collar (302), and the other end face is fixedly connected to the pneumatic chuck (304). The rotary motor (305) is fixedly mounted on the upper surface of the base (1), and its shaft is connected to the synchronous pulley (303) via a synchronous belt and a synchronous pulley. A guide ring (306) is provided on the side of the column plate (301) away from the collar (302). The guide ring (306), the round hole on the column plate (301), the collar (302), the synchronous pulley (303), and the pneumatic chuck (304) are all arranged on the same axis.

4. A laser cutting device for cold rolled circular steel as claimed in claim 3, wherein: The laser cutting device (4) includes a support (401) and a laser cutting head (402). The support (401) is fixedly disposed on the upper surface of the base (1), and the laser cutting head (402) is fixedly disposed on the support (401).

5. A laser cutting device for cold rolled circular steel as claimed in claim 4, wherein: The adjustable abutting device (5) includes a set of symmetrically arranged slide rods (501), an abutting member (502) arranged on the slide rods (501), and an adjustable pulling member (503) arranged on the slide rods (501); The two ends of the two slide rods (501) are fixedly mounted on the upper surface of the base (1) through open clamping blocks, and a gap is left between the two slide rods (501) to facilitate the cold-bent round steel falling into the blanking cavity (6). The abutting member (502) includes an abutting plate (502a) and an abutting block (502b). The abutting plate (502a) is connected to the two slide rods (501) respectively through two sliding sleeves. The abutting block (502b) has a circular cross-section and is fixedly mounted on the abutting plate (502a) near the laser cutting edge. On one side of the device (4), the abutment block (502b) is coaxially arranged with the collar (302). The adjustable pulling member (503) includes a pulling cylinder (503a) and a pulling cylinder connecting seat (503b). The cylinder body of the pulling cylinder (503a) is fixedly connected to the pulling cylinder connecting seat (503b). The pulling cylinder connecting seat (503b) is connected to the two sliding rods (501) through a slider with a locking mechanism. The telescopic rod of the pulling cylinder (503a) is fixedly connected to the abutment plate (502a).

6. A laser cutting device for cold rolled circular steel as claimed in claim 4 wherein: The guide ring (306) is also provided with a tapered inclined surface (307).

7. The laser cutting device for cold rolled circular steel as claimed in claim 1 wherein: A support roller component (8) is also provided between the clamping and rotating device (3) and the feeding device (2). The support roller component (8) includes a support wheel (801), a U-shaped mounting bracket (802) and a connecting plate (803). The U-shaped mounting bracket (802) is fixedly mounted on the connecting plate (803), and the support wheel (801) is connected to the U-shaped mounting bracket (802) through a shaft bearing.

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