CN218983328U

CN218983328U - Round steel cutting device

Info

Publication number: CN218983328U
Application number: CN202222875549.8U
Authority: CN
Inventors: 萧锋
Original assignee: Hangzhou Mingqiu Machinery Co ltd
Current assignee: Hangzhou Mingqiu Machinery Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-05-09
Anticipated expiration: 2032-10-28

Abstract

The utility model belongs to the technical field of steel processing, a round steel cuts device is disclosed, the on-line screen storage device comprises a base, the upper surface symmetry of base is provided with two first cylinders, and the piston rod tip of two first cylinders is provided with the installation pole jointly, the spout has been run through to the upper surface of installation pole, the slip is provided with the second cylinder in the spout, the fixed mounting box that is provided with of piston rod tip of second cylinder, fixedly on the mounting box diapire be provided with the motor, the lateral wall of mounting box is run through to the output shaft of motor, the fixed cutting blade that is provided with of output shaft tip of motor, the movable groove has been seted up to the upper surface of base, the upper surface fixation of base is provided with first clamp lever, the sliding is provided with the second clamp lever in the movable groove, fixedly on the lateral wall that the second clamp lever is close to first clamp lever is provided with the third cylinder. The utility model has the effect of improving the stability of the device.

Description

Round steel cutting device

Technical Field

The application relates to the technical field of steel processing, and more specifically relates to a round steel cutting device.

Background

Round steel is a steel commonly used in the market, is suitable for the fields of industrial production, aerospace, building materials and the like, and is often required to be cut off due to overlong when being made into finished products so as to meet the demands of customers.

The utility model discloses a round steel cutting device in Chinese patent with publication number of CN212704628U, which belongs to the technical field of round steel cutting, wherein two hydraulic cylinders and two clamping mechanisms are fixed at the top end of a workbench and are provided with sliding grooves, a straight rod is fixed on a piston rod of each hydraulic cylinder, a straight notch is arranged at the top end of each straight rod, a plurality of through holes penetrating through the straight notch are arranged on the side surface of each straight rod, a movable rod is connected in the straight notch in a sliding manner, and a cutting mechanism is fixed at the bottom end of each movable rod; the clamping mechanism comprises a first supporting rod, a second supporting rod and a telescopic cylinder, wherein the bottom end of the first supporting rod is movably connected with the sliding chute, and the first supporting rod is connected with the second supporting rod through the telescopic cylinder; the side surfaces of the first support rod and the second support rod are respectively provided with an arc groove with opposite positions, and arc clamping blocks are connected in the arc grooves through a plurality of springs.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: the movable rod in the device is fixed with the through hole through the locating pin, when a worker needs to fix the movable rod, the worker needs to slide the movable rod to a proper position, and then the worker fixes the movable block through the fixing pin. In the process, a worker needs to hold the movable rod by one hand and fix the movable block by one hand through the fixing pin, so that the working difficulty of the worker is improved.

Disclosure of Invention

In order to solve the problems, the application provides a round steel cutting device.

The application provides a round steel cuts device adopts following technical scheme:

the utility model provides a round steel cuts device, includes the base, the upper surface symmetry of base is provided with two first cylinders, and the piston rod tip of two first cylinders is provided with the installation pole jointly, the spout has been seted up in the upper surface of installation pole, the slip is provided with the second cylinder in the spout, the piston rod tip fixed of second cylinder is provided with the mounting box, fixed being provided with the motor on the mounting box diapire, the output shaft of motor runs through the lateral wall of mounting box, the output shaft tip fixed of motor is provided with the cutting blade, the movable groove has been seted up to the upper surface of base, the upper surface fixed of base is provided with first clamp pole, the sliding motion is provided with the second clamp pole in the movable groove, the second clamp pole is close to fixed being provided with the third cylinder on the lateral wall of first clamp pole, the piston rod tip of third cylinder is close to the lateral wall of second clamp pole and is fixed each other, the arc wall that all is close to each other has been seted up on the lateral wall of first clamp pole, the inner wall of spout has run through and has been seted up the settling groove, the fixed side wall that is used for sliding bar is fixed with the second cylinder to slide bar each other.

Through the technical scheme, when the working personnel need cut the pipe, the working personnel need start the third cylinder, and then make first clamping lever and second clamping lever adjust the distance of first clamping lever and second clamping lever according to the diameter of pipe to make first clamping lever and second clamping lever press from both sides tightly the pipe, and then the working personnel slides the slide bar and adjusts the cutting length of pipe. At this time, the staff needs to start the second cylinder, and then makes the piston rod of second cylinder move downwards to make the mounting box move downwards under the effect of second cylinder piston rod, and then make cutting blade move downwards under the effect of mounting box, thereby make cutting blade be close gradually and finally support tightly the pipe, and then make cutting blade cut the pipe. In this in-process, when the staff need fixed slide bar, the staff need start fixed subassembly, and then has reduced the probability that takes place to rock when the slide bar receives external force to the probability that takes place to rock when having reduced cutting blade and receiving external force, and then improved the stability of device.

Further, the side wall of slide bar has been seted up and has been supported tight groove, support and seted up the fixed slot on the inner wall in tight groove, fixed subassembly is including sliding the fixed block that sets up in the fixed slot, slide and set up in support tight piece and the screw thread of support tight inslot and run through the threaded rod that sets up on the slide bar kept away from the second cylinder lateral wall, the threaded rod rotates with the fixed block to be connected, support and set up the inclined plane on the lateral wall that the tight piece is close to the fixed block and its lateral wall that keeps away from the setting tank crossing edge.

Through the technical scheme, when the staff needs to fix the slide bar, the staff needs to rotate the threaded rod, and then the threaded rod moves towards the direction close to the tight block, so that the fixed block moves towards the direction close to the tight block under the action of the threaded rod, and then the side wall of the fixed block gradually approaches and finally supports the tight inclined plane, and thus the tight block slides towards the inner wall close to the mounting groove under the action of the fixed block, and then the tight block supports the inner wall of the mounting groove, thereby reducing the probability of shaking when the slide bar receives external force, and further reducing the probability of shaking when the cutting blade receives external force, and improving the stability of the device.

Further, a reset groove is formed in the inner bottom wall of the abutting groove, a reset block is arranged in the reset groove in a sliding mode, a first spring is fixedly arranged on the side wall, away from the accommodating groove, of the reset block, the other end of the first spring is fixedly arranged on the inner wall, away from the accommodating groove, of the reset groove, and the upper surface of the reset block is mutually fixed with the bottom surface of the abutting block.

Through the technical scheme, when the fixed block is mutually separated from the abutting block, the reset block slides in the direction away from the settling groove under the action of the first spring, and then the fixed block slides in the direction away from the settling groove under the action of the reset block, so that the fixed block is mutually separated from the inner wall of the settling groove, the difficulty of sliding the sliding rod by a worker is reduced, and the working difficulty of the worker is reduced.

Further, limiting grooves are formed in two opposite inner walls of the movable groove, limiting blocks are slidably arranged in the limiting grooves, and the side walls of the limiting blocks, which are close to each other, are mutually fixed with the side wall of the third cylinder.

Through the technical scheme, when the first clamping rod slides under the action of the third cylinder, the limiting block slides along with the first clamping rod under the action of the first clamping rod. In this in-process, the upper surface of stopper and the interior roof butt of spacing groove, the bottom surface of stopper and the interior roof butt of spacing groove, and then reduced the stopper and taken place the probability that rocks at the slip in-process to reduced the probability that first clamping lever took place to rock at the slip in-process, and then improved the stability of device.

Further, a second spring is fixedly arranged on the inner wall of the arc-shaped groove, and an arc-shaped block is fixedly arranged at the other end of the second spring.

Through the technical scheme, when the first clamping rod and the second clamping rod clamp the round tube, the arc-shaped block moves towards the direction close to the arc-shaped groove under the action of the round tube, and then the arc-shaped block extrudes the second spring, so that the side wall of the arc-shaped block abuts against the inner wall of the arc-shaped groove. In the process, the probability of shaking in the circular tube cutting process is reduced, so that the stability of the device is improved.

Further, a blocking groove is formed in the inner top wall of the placement groove, a blocking block is slidably arranged in the blocking groove, and the upper surfaces of the bottom sliding bars of the blocking block are mutually fixed.

Through the technical scheme, when the staff slides the slide bar, the blocking block slides along with the slide bar under the action of the slide bar. In the process, when the side wall of the blocking block abuts against the inner wall of the blocking groove, the sliding rod stops sliding, so that the probability of mutual separation of the sliding rod and the placement groove is reduced, and the stability of the device is improved.

Further, a handle for reducing the working difficulty of staff is fixedly arranged on the side wall of the threaded rod.

Through above-mentioned technical scheme, the handle has reduced the degree of difficulty that the staff rotated the threaded rod to the work degree of difficulty of staff has been reduced.

Further, a rubber sheet for improving the stability of the device is fixedly arranged on the side wall of the abutting block.

Through the technical scheme, the rubber has good elasticity, and the rubber sheet made of the rubber improves the maximum static friction force upper limit of the abutting block and the inner wall of the mounting groove, so that the stability of the device is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) In this application, when the staff need cut the pipe, the staff need start the third cylinder, and then makes first clamping lever and second clamping lever adjust first clamping lever and second clamping lever's distance according to the diameter of pipe to make first clamping lever and second clamping lever press from both sides tightly the pipe, and then the staff slides the slide bar and adjusts the cutting length of pipe. At this time, the staff needs to start the second cylinder, and then makes the piston rod of second cylinder move downwards to make the mounting box move downwards under the effect of second cylinder piston rod, and then make cutting blade move downwards under the effect of mounting box, thereby make cutting blade be close gradually and finally support tightly the pipe, and then make cutting blade cut the pipe. In the process, when a worker needs to fix the sliding rod, the worker needs to start the fixing assembly, so that the probability of shaking when the sliding rod is subjected to external force is reduced, the probability of shaking when the cutting blade is subjected to external force is reduced, and the stability of the device is improved;

(2) In the application, when a worker needs to fix the sliding rod, the worker needs to rotate the threaded rod, and then the threaded rod moves towards the direction close to the abutting block, so that the fixed block moves towards the direction close to the abutting block under the action of the threaded rod, and then the side wall of the fixed block gradually approaches and finally abuts against the inclined surface, and then the abutting block slides towards the inner wall close to the mounting groove under the action of the fixed block, and then the abutting block abuts against the inner wall of the mounting groove, so that the shaking probability of the sliding rod when the sliding rod is subjected to external force is reduced, and then the shaking probability of the cutting blade when the cutting blade is subjected to external force is reduced, and the stability of the device is improved;

(3) In this application, when fixed block and support tight piece mutually separating, reset the piece and slide to the direction of keeping away from the mounting groove under the effect of first spring, and then make the fixed block slide to the direction of keeping away from the mounting groove under the effect of reset the piece to make the fixed block mutually separate with the inner wall of mounting groove, and then reduced the degree of difficulty of staff's slip slide bar, thereby reduced the work degree of difficulty of staff.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic view of a structure for highlighting a blocking member according to the present application;

FIG. 3 is a schematic cross-sectional view of the present application for highlighting a securing assembly;

FIG. 4 is a schematic cross-sectional view of a reset block for highlighting of the present application;

FIG. 5 is a schematic view of the structure of the present application for highlighting the stopper;

fig. 6 is a schematic view of a structure for highlighting the motor according to the present application.

The reference numerals in the figures illustrate:

1. a base; 11. a first cylinder; 12. a mounting rod; 13. a second cylinder; 14. a mounting box; 15. a cutting blade; 16. a first clamping bar; 17. a second clamping bar; 18. a third cylinder; 19. a slide bar; 111. a motor; 2. a chute; 21. a movable groove; 22. an arc-shaped groove; 23. a tightening groove; 24. a fixing groove; 25. a reset groove; 26. a limit groove; 27. a blocking groove; 28. a placement groove; 3. a fixing assembly; 31. a fixed block; 32. a tightening block; 33. a threaded rod; 34. an inclined surface; 4. a reset block; 41. a first spring; 5. a limiting block; 6. a second spring; 61. an arc-shaped block; 7. a blocking piece; 8. a handle; 9. a rubber sheet.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; it is apparent that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by a person having ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the scope of protection of the present application.

Example 1:

the present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses round steel cuts device, please refer to fig. 1-6, including base 1, first cylinder 11, installation pole 12, second cylinder 13, install bin 14, motor 111, cutting blade 15, first clamp lever 16, second clamp lever 17, third cylinder 18, slide bar 19, fixed subassembly 3, reset block 4, first spring 41, stopper 5, second spring 6, arc piece 61 and stop piece 7. The base 1 is of a rectangular plate-shaped structure, and a movable groove 21 is formed in the upper surface of the base 1. The first cylinders 11 are symmetrically arranged on the upper surface of the base 1, and the axes of the piston rods of the first cylinders are vertical. The installation pole 12 is rectangle shaft-like structure, and the both ends of installation pole 12 set up respectively at the piston rod tip of two first cylinders 11, and spout 2 has been seted up in the upper surface penetration of installation pole 12, and has run through on the inner wall of spout 2 and has been seted up setting groove 28. The second cylinder 13 is slidably arranged in the chute 2, and the output shaft of the piston rod is vertical. The mounting box 14 is a rectangular box structure, and the mounting box 14 is fixedly arranged at the end part of a piston rod of the second cylinder 13. The motor 111 is fixedly provided on the inner bottom wall of the mounting case 14 with its output shaft axis horizontal, and the output shaft of the motor 111 penetrates the side wall of the mounting case 14. The cutting blade 15 is fixedly provided at an end of an output shaft of the motor 111 for cutting the round tube. The first clamping rod 16 is of a rectangular rod-shaped structure, and the first clamping rod 16 is fixedly arranged on the upper surface of the base 1. The second clamping rod 17 is of a rectangular rod-shaped structure, the second clamping rod 17 is slidably arranged in the movable groove 21, and arc-shaped grooves 22 are formed in the side walls, close to each other, of the first clamping rod 16 and the second clamping rod 17. The third cylinder 18 is fixedly arranged on the side wall of the first clamping rod 16 close to the second clamping rod 17, the axis of a piston rod of the third cylinder is horizontal, and the end part of the piston rod of the third cylinder 18 and the side wall of the first clamping rod 16 close to the second clamping rod 17 are mutually fixed. The slide bar 19 is of a rectangular rod-shaped structure, the slide bar 19 is slidably arranged in the accommodating groove 28, and the side wall, close to the second air cylinder 13, of the slide bar 19 is mutually fixed with the second air cylinder 13.

The side wall of the slide bar 19 is provided with a propping groove 23, and the inner wall of the propping groove 23 is provided with a fixing groove 24. The fixed component 3 is arranged on the slide bar 19 and is used for fixing the slide bar 19, and the fixed component 3 comprises a fixed block 31, a propping block 32 and a threaded rod 33. The fixed block 31 has a rectangular block structure, and the fixed block 31 is slidably disposed in the fixed slot 24. The abutting block 32 is of a rectangular block structure, the abutting block 32 is slidably arranged in the abutting groove 23, and an inclined surface 34 is formed on an edge, intersecting with the side wall, far away from the mounting groove 28, of the side wall, close to the fixed block 31, of the abutting block 32. The threaded rod 33 is threaded through a side wall of the slide rod 19 away from the second cylinder 13, the axis of the threaded rod is horizontal, and the threaded rod 33 is rotatably connected with the fixed block 31.

When the staff needs to fix the slide bar 19, the staff needs to rotate the threaded rod 33, and then the threaded rod 33 moves towards the direction close to the abutting block 32, so that the fixed block 31 moves towards the direction close to the abutting block 32 under the action of the threaded rod 33, and then the side wall of the fixed block 31 gradually approaches and finally abuts against the inclined surface 34, and then the abutting block 32 slides towards the inner wall close to the mounting groove 28 under the action of the fixed block 31, and then the abutting block 32 abuts against the inner wall of the mounting groove 28, so that the shaking probability of the slide bar 19 when the external force is reduced, and then the shaking probability of the cutting blade 15 when the external force is reduced, and the stability of the device is improved.

The reset groove 25 is formed in the inner bottom wall of the abutting groove 23, the reset block 4 is of a rectangular block structure, the reset block 4 is slidably arranged in the reset groove 25, and the upper surface of the reset block 4 and the bottom surface of the abutting block 32 are mutually fixed. One end of the first spring 41 is fixedly arranged on the side wall of the reset block 4 far away from the setting groove 28, and the other end of the first spring 41 is fixedly arranged on the inner wall of the reset groove 25 far away from the setting groove 28

When fixed block 31 and support tight piece 32 mutually separate, reset block 4 slides to the direction of keeping away from mounting groove 28 under the effect of first spring 41, and then makes fixed block 31 slide to the direction of keeping away from mounting groove 28 under reset block 4 to make fixed block 31 and mounting groove 28's inner wall mutually separate, and then reduced the degree of difficulty that the staff slided slide bar 19, thereby reduced the work degree of difficulty of staff.

Limiting grooves 26 are formed in two opposite inner walls of the movable groove 21, limiting blocks 5 are of rectangular rapid structures, two limiting blocks 5 are arranged in the two limiting grooves 26 in a sliding mode respectively, and the side walls of the two limiting blocks 5, which are close to each other, are mutually fixed with the side wall of the third cylinder 18.

When the first clamping rod 16 slides under the action of the third cylinder 18, the limiting block 5 slides along with the first clamping rod 16 under the action of the first clamping rod 16. In this process, the upper surface of stopper 5 and the interior roof butt of spacing groove 26, the bottom surface of stopper 5 and the interior roof butt of spacing groove 26, and then reduced stopper 5 and taken place the probability that rocks at the slip in-process to reduced the probability that first clamp lever 16 takes place to rock at the slip in-process, and then improved the stability of device.

One end of the second spring 6 is fixedly arranged on the inner wall of the arc-shaped groove 22, and the other end of the second spring 6 is fixedly provided with an arc-shaped block 61. The arc-shaped block 61 is of an arc-shaped block 61 structure, and the arc-shaped block 61 is fixedly arranged at the other end of the second spring 6.

When the first clamping rod 16 and the second clamping rod 17 clamp the round tube, the arc-shaped block 61 moves towards the direction close to the arc-shaped groove 22 under the action of the round tube, so that the arc-shaped block 61 extrudes the second spring 6, and the side wall of the arc-shaped block 61 abuts against the inner wall of the arc-shaped groove 22. In the process, the probability of shaking in the circular tube cutting process is reduced, so that the stability of the device is improved.

The inner top wall of the placement groove 28 is provided with a blocking groove 27, the blocking block 7 is of a rectangular rapid structure, the blocking block 7 is arranged in the blocking groove 27 in a sliding mode, and the upper surfaces of the bottom sliding rods 19 of the blocking block 7 are mutually fixed.

When a worker slides the slide bar 19, the blocking piece 7 slides along the slide bar 19 under the action of the slide bar 19. In this process, when the side wall of the blocking block 7 abuts against the inner wall of the blocking groove 27, the slide bar 19 stops sliding, so that the probability of the slide bar 19 and the placement groove 28 being separated from each other is reduced, and the stability of the device is improved.

In order to reduce the working difficulty of the staff, a handle 8 is fixedly arranged on the side wall of the threaded rod 33. The handle 8 reduces the difficulty of the worker in rotating the threaded rod 33, thereby reducing the work difficulty of the worker.

In order to improve the stability of the device, a rubber sheet 9 is fixedly arranged on the side wall of the abutting block 32. The rubber has good elasticity, and the rubber sheet 9 made of the rubber improves the maximum upper limit of static friction force between the abutting block 32 and the inner wall of the placement groove 28, so that the stability of the device is improved.

The implementation principle of the round steel cutting device in the embodiment of the application is as follows: when the worker needs to cut the round tube, the worker needs to start the third cylinder 18, so that the first clamping rod 16 and the second clamping rod 17 adjust the distance between the first clamping rod 16 and the second clamping rod 17 according to the diameter of the round tube, so that the first clamping rod 16 and the second clamping rod 17 clamp the round tube, and the worker slides the slide rod 19 to adjust the cutting length of the round tube. At this time, the worker starts the second cylinder 13, and then moves the piston rod of the second cylinder 13 downward, so that the mounting box 14 moves downward under the action of the piston rod of the second cylinder 13, and then the cutting blade 15 moves downward under the action of the mounting box 14, so that the cutting blade 15 gradually approaches and finally abuts against the round tube, and then the cutting blade 15 cuts the round tube. In this process, when the staff needs to fix the slide bar 19, the staff needs to start the fixing component 3, so that the staff needs to rotate the threaded rod 33, and then make the threaded rod 33 move towards the direction close to the abutting block 32, so that the fixing block 31 moves towards the direction close to the abutting block 32 under the action of the threaded rod 33, and then the side wall of the fixing block 31 gradually approaches and finally abuts against the inclined surface 34, so that the abutting block 32 slides towards the inner wall close to the mounting groove 28 under the action of the fixing block 31, and then the abutting block 32 abuts against the inner wall of the mounting groove 28, thereby reducing the probability of shaking when the slide bar 19 receives external force, and then reducing the probability of shaking when the cutting blade 15 receives external force, and further improving the stability of the device.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. Round steel cuts device, its characterized in that: the device comprises a base (1), wherein two first air cylinders (11) are symmetrically arranged on the upper surface of the base (1), mounting rods (12) are jointly arranged at the end parts of piston rods of the two first air cylinders (11), a sliding chute (2) is formed in a penetrating mode in the upper surface of the mounting rods (12), a second air cylinder (13) is arranged in the sliding chute (2) in a sliding mode, a mounting box (14) is fixedly arranged at the end part of a piston rod of the second air cylinder (13), a motor (111) is fixedly arranged on the inner bottom wall of the mounting box (14), an output shaft of the motor (111) penetrates through the side wall of the mounting box (14), and a cutting blade (15) is fixedly arranged at the end part of an output shaft of the motor (111); the movable groove (21) has been seted up to the upper surface of base (1), the fixed first clamp lever (16) that is provided with of upper surface of base (1), the interior second clamp lever (17) that is provided with of movable groove (21), fixed third cylinder (18) that are provided with on the lateral wall that second clamp lever (17) are close to first clamp lever (16), the piston rod tip of third cylinder (18) is fixed each other with the lateral wall that first clamp lever (16) are close to second clamp lever (17), arc wall (22) have all been seted up on the lateral wall that first clamp lever (16) and second clamp lever (17) are close to each other, install setting groove (28) have been run through on the inner wall of spout (2), install sliding bar (19) are provided with in the sliding bar (28), the lateral wall that sliding bar (19) are close to second cylinder (13) is fixed each other with second cylinder (13), be provided with on sliding bar (19) and be used for fixed subassembly (3) of sliding bar (19).

2. A round steel cutoff device according to claim 1 wherein: the side wall of slide bar (19) is provided with a tight groove (23), the inner wall of tight groove (23) is provided with a fixed groove (24), fixed subassembly (3) is including sliding fixed block (31) that set up in fixed groove (24), sliding tight piece (32) and screw thread that set up in tight groove (23) are run through threaded rod (33) that set up on slide bar (19) keep away from second cylinder (13) lateral wall, threaded rod (33) are connected with fixed block (31) rotation, tight piece (32) are close to lateral wall of fixed block (31) and have seted up inclined plane (34) on its crossing edge of lateral wall that keeps away from settling groove (28).

3. A round steel cutoff device according to claim 2 wherein: the utility model discloses a reset device for the wall-mounted type electric car, including support tight groove (23) and fixed block (32), reset groove (25) has been seted up on the interior diapire of support tight groove (23), it is provided with reset block (4) to slide in reset groove (25), reset block (4) keep away from fixed being provided with first spring (41) on the lateral wall of standing groove (28), the other end of first spring (41) is fixed to be set up on reset groove (25) keep away from the inner wall of standing groove (28), the upper surface of reset block (4) is fixed each other with the bottom surface of support tight block (32).

4. A round steel cutoff device according to claim 1 wherein: limiting grooves (26) are formed in two opposite inner walls of the movable groove (21), limiting blocks (5) are slidably arranged in the limiting grooves (26), and the side walls of the limiting blocks (5) close to each other are mutually fixed with the side walls of the third air cylinder (18).

5. A round steel cutoff device according to claim 1 wherein: the inner wall of the arc-shaped groove (22) is fixedly provided with a second spring (6), and the other end of the second spring (6) is fixedly provided with an arc-shaped block (61).

6. A round steel cutoff device according to claim 1 wherein: the inner top wall of the placement groove (28) is provided with a blocking groove (27), a blocking block (7) is arranged in the blocking groove (27) in a sliding mode, and the upper surfaces of the bottom sliding rods (19) of the blocking block (7) are mutually fixed.

7. A round steel cutoff device according to claim 2 wherein: the side wall of the threaded rod (33) is fixedly provided with a handle (8) for reducing the working difficulty of staff.

8. A round steel cutoff device according to claim 2 wherein: and a rubber sheet (9) for improving the stability of the device is fixedly arranged on the side wall of the abutting block (32).