Steel structure numerical control cutting machine

Abstract

The utility model discloses a steel structure numerical control cutting machine which comprises a machine tool, a processing device is installed on the machine tool and comprises supporting plates, a through groove and a collecting bin, the through groove is formed between the supporting plates, the collecting bin is formed in the machine tool, a driving assembly is arranged at the top end of the machine tool, and a cutting knife is arranged at the bottom end of the driving assembly. A quick-change device is arranged on one side of the cutting knife, a spray pipe is arranged on one side of the driving assembly, a conveying pipe is arranged above the spray pipe, one end of the conveying pipe is connected with a regulation and control device, and the regulation and control device comprises a threaded rod, a threaded sleeve, a push spring, a stop rod, a flow stopping block, a guide mechanism, a conical block, a conical spring, an annular groove, a stop groove, a sleeve, a top sleeve and an adjusting sleeve; the push spring is arranged on the outer side of the stop rod in a sleeved mode, the flow choking block is installed in the sleeve, the conical block is connected with the flow choking block through the conical spring, the stop grooves are formed in the annular groove, and the cutting efficiency, the equipment reliability and the cutting quality of the steel structure numerical control cutting machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure numerical control cutting, and more specifically, to a steel structure numerical control cutting machine. Background Art

[0002] In the existing CNC cutting technology for steel structures, there are several key issues, which involve the treatment of cutting fluid, the replacement of cutting knives, and the regulation of cutting fluid delivery pipelines. These issues may affect cutting efficiency, equipment life, and cutting quality.

[0003] First of all, existing steel structure CNC cutting machines usually need to spray cutting fluid to reduce the temperature of the cutting knife during the cutting process. The cutting fluid not only helps to cool the cutting knife, but also can take away the waste generated during the cutting process. However, the structure of existing devices is often simple, lacking an effective cutting fluid and waste processing system, which may lead to the accumulation of cutting fluid and waste, affecting the cleanliness of the cutting area, and may even block the cutting path, thereby reducing cutting efficiency, increasing equipment maintenance costs, and posing a potential threat to the health and safety of operators.

[0004] Secondly, the installation and disassembly process of the cutting knife is usually complicated in the prior art. Due to the various models and materials of the cutting knives, and the need for equipment to be frequently replaced according to different process requirements or due to wear of the cutting knife, the limitations of the prior art lead to the inconvenience of replacing the cutting knife. This inconvenience not only increases the labor intensity of the operator, but may also prolong the downtime of the equipment and affect production efficiency.

[0005] In addition, the pipeline for conveying cutting fluid is usually designed to be simple in the prior art and lacks an effective regulation mechanism, which results in that the conveying speed of the cutting fluid cannot be precisely controlled according to the cutting requirements, which may affect the cutting quality. Too fast a conveying speed may cause the cutting fluid to fail to fully cool the cutting knife or fail to effectively remove the waste, while too slow a conveying speed may cause the cutting area to overheat, affecting the cutting accuracy and the life of the cutting knife. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the utility model provides a steel structure CNC cutting machine to solve the technical problems mentioned in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel structure CNC cutting machine, comprising a machine tool, a processing device is installed on the machine tool, the processing device comprises a support plate, a through slot and a collection bin, a plurality of the support plates are installed on the machine tool, the through slot is arranged between two adjacent support plates, the collection bin is opened inside the machine tool, a drive assembly is arranged on the top of the machine tool, a cutting knife is arranged on the output end of the drive assembly, a quick change device is arranged on one side of the cutting knife, a nozzle is arranged on one side of the drive assembly, a delivery pipe is arranged above the nozzle, one end of the delivery pipe is connected to a regulating device, the regulating device comprises a screw, a screw sleeve , push spring, stop rod, baffle block, guide mechanism, conical block, conical spring, annular groove, stop groove, sleeve, top sleeve and adjusting sleeve, the screw rod is connected to the inner side of the adjusting sleeve, the screw sleeve is connected to the inner side of the top sleeve, and the screw sleeve is movably sleeved on the outside of the screw rod through a thread, the push spring is movably sleeved on the outside of the stop rod, the stop rod is movably arranged on one side of the adjusting sleeve, the baffle block is movably installed in the sleeve, the conical block is connected to the baffle block through a conical spring, the annular groove is opened on one side of the adjusting sleeve, a plurality of the stop grooves are opened in the annular groove, the top sleeve is movably arranged in the sleeve, and the adjusting sleeve is movably connected to one end of the sleeve.

[0010] The utility model is further configured that a filter screen is provided below the support plate, and the filter screen can be detachably installed in the collection bin.

[0011] The utility model is further configured that a bellows is provided above the nozzle, and the top end of the bellows is connected to the sleeve.

[0012] The utility model is further configured that the guide mechanism includes a matching groove and a matching block, the matching groove is arranged in the sleeve, the matching block is fixedly connected to one side of the baffle block, and the matching block is slidably installed in the matching groove.

[0013] The utility model is further configured that a sliding block is provided at one end of the baffle block, a sliding groove is provided at one side of the top sleeve, and the sliding block is slidably installed in the sliding groove.

[0014] The utility model is further configured as follows: the quick-change device includes a spiral groove, a sliding ball, a rotating sleeve, a fixed sleeve, a fixed rod, a movable groove, a ball and a clamping groove; the spiral groove is arranged on the side wall of the fixed sleeve; the sliding ball is fixedly arranged on the inner side of the rotating sleeve, and the sliding ball is slidably arranged in the spiral groove; the rotating sleeve is movably arranged on the outer side of the fixed sleeve; the movable groove is arranged on the side wall of the fixed sleeve; the ball can be movably installed in the movable groove; the clamping groove is arranged on the side wall of the fixed rod; and the establishment of the quick-change device realizes the rapid replacement of the cutting knife.

[0015] The utility model is further configured that a second spring is provided on one side of the rotating sleeve, and the other end of the second spring is in contact with the fixed sleeve. The provision of the second spring ensures stable use of the quick-change device.

[0016] The utility model is further configured as follows: a handle is provided on one side of the fixed sleeve, positioning rods are provided on both sides of the handle, a first spring is provided on the outer side of the positioning rod, a positioning groove is provided on the top of the rotating sleeve, and one end of the positioning rod is inserted into the positioning groove. The configuration of the above components can prevent the rotating sleeve from rotating easily.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a steel structure CNC cutting machine with the following features:

[0019] Beneficial effects:

[0020] 1. The processing device realizes the reasonable treatment of cutting liquid and waste chips through the combination of support plates, through grooves and collection bins. The through grooves are located between adjacent support plates to ensure that the waste chips generated by cutting can fall smoothly into the collection bin, and then the cutting liquid and waste chips are separated by the filter screen to achieve unified collection and centralized treatment. This not only maintains the cleanliness of the cutting area, but also effectively improves the separation efficiency of cutting liquid and waste chips, avoiding the problems of waste chip accumulation and cutting path blockage.

[0021] 2. The quick-change device uses the design of multiple components such as spiral grooves, sliding balls and card slots to make the installation and removal of the cutting knife faster and more convenient. The handle controls the positioning rod to disengage from the positioning groove, and then rotates the rotating sleeve. The sliding ball moves in the spiral groove and disengages the fixed sleeve from the fixed rod to achieve the function of quickly replacing the cutting knife. This design fully considers the diversity of cutting knife models and materials, provides convenience for frequent replacement, significantly reduces labor intensity, and shortens equipment downtime.

[0022] 3. The control device adopts a combined structure of a screw, a push spring, a baffle and a conical block. By adjusting the sliding distance of the screw and the screw sleeve, the cross-sectional area of ​​the baffle block and the inner wall of the casing is changed, thereby achieving precise control of the chip fluid conveying speed. The limit design of the matching block and the matching groove ensures the stable sliding of the baffle block. The adjustment of the conical spring gap further realizes the flexible adjustment of the flow rate. This design ensures that the conveying flow rate of the chip fluid can be accurately controlled according to the cutting requirements, ensuring that the cutting knife operates in the best state and effectively avoiding overheating of the cutting area or incomplete cleaning of waste chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a steel structure CNC cutting machine in the utility model;

[0024] Figure 2It is a schematic diagram of the cross-sectional structure in the utility model;

[0025] Figure 3 It is a cross-sectional structural diagram of the quick-change device part of the utility model;

[0026] Figure 4 It is a cross-sectional structural diagram of the control device part in the utility model;

[0027] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0028] In the figure: 1, machine tool; 2, support plate; 3, through groove; 4, collecting bin; 5, drive assembly; 6, cutting knife; 7, nozzle; 8, delivery pipe; 9, screw; 10, screw sleeve; 11, push spring; 12, stop rod; 13, flow blocking block; 14, conical block; 15, conical spring; 16, annular groove; 17, stop groove; 18, sleeve; 19, top sleeve; 20, adjustment sleeve; 21, filter screen; 22, bellows; 23, matching groove; 24, matching block; 25, sliding block; 26, sliding groove; 27, spiral groove; 28, sliding ball; 29, rotating sleeve; 30, fixed sleeve; 31, fixed rod; 32, movable groove; 33, ball; 34, slot; 35, second spring; 36, handle; 37, positioning rod; 38, first spring; 39, positioning groove. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0032] See also Figure 1-5A steel structure CNC cutting machine comprises a machine tool 1, a processing device is installed on the machine tool 1, the processing device comprises a support plate 2, a through groove 3 and a collecting bin 4, a plurality of support plates 2 are installed on the machine tool 1, the through groove 3 is arranged between two adjacent support plates 2, the collecting bin 4 is opened inside the machine tool 1, a driving assembly 5 is arranged at the top of the machine tool 1, a cutting knife 6 is arranged at the output end of the driving assembly 5, a quick change device is arranged on one side of the cutting knife 6, a nozzle 7 is arranged on one side of the driving assembly 5, a delivery pipe 8 is arranged above the nozzle 7, and a regulating device is connected to one end of the delivery pipe 8, and the regulating device comprises a screw 9, a screw sleeve 10, a push spring 11, a stop rod 12, a flow block 13, a guide mechanism, a conical block 14, a conical spring 15, annular groove 16, stop groove 17, sleeve 18, top sleeve 19 and adjusting sleeve 20, the screw rod 9 is connected to the inner side of the adjusting sleeve 20, the screw sleeve 10 is connected to the inner side of the top sleeve 19, and the screw sleeve 10 is movably sleeved on the outer side of the screw rod 9 through a thread, the push spring 11 is movably sleeved on the outer side of the stop rod 12, the stop rod 12 is movably set on one side of the adjusting sleeve 20, the baffle block 13 is movably installed in the sleeve 18, the conical block 14 is connected to the baffle block 13 through the conical spring 15, the annular groove 16 is opened on one side of the adjusting sleeve 20, a plurality of stop grooves 17 are opened in the annular groove 16, the top sleeve 19 is movably set in the sleeve 18, and the adjusting sleeve 20 is movably connected to one end of the sleeve 18.

[0033] A filter screen 21 is provided below the support plate 2 , and the filter screen 21 can be detachably installed in the collection bin 4 .

[0034] A bellows 22 is provided above the nozzle 7 , and the top end of the bellows 22 is connected to the sleeve 18 .

[0035] The guide mechanism includes a matching groove 23 and a matching block 24 . The matching groove 23 is provided in the sleeve 18 . The matching block 24 is fixedly connected to one side of the baffle block 13 . The matching block 24 is slidably installed in the matching groove 23 .

[0036] A sliding block 25 is provided at one end of the baffle block 13 , and a sliding groove 26 is provided at one side of the top sleeve 19 , in which the sliding block 25 is slidably installed.

[0037] In this embodiment, when it is necessary to use the device to cut a steel structure product, first fix the product above the support plate 2 through an external positioning device, then turn on the drive assembly 5, so that the drive assembly 5 cuts the product through the cutting knife 6 set at the output end, and at the same time turn on the external conveying device, so that the conveying device conveys the cutting liquid to the nozzle 7 through the conveying pipe 8, and then sprays it to the cutting position of the cutting knife 6 through the nozzle 7. At the same time, the position and angle of the nozzle 7 can be fine-tuned by setting the bellows 22, and then the cutting liquid will cool the cutting knife 6, and at the same time, the cutting liquid at the spraying position will entrain the cutting liquid. The cut waste chips usually flow into the collection bin 4 arranged below, and then the waste chips will be left above the filter screen 21 arranged in the collection bin 4, and the chip liquid will enter the bottom of the collection bin 4 through the filter holes opened on the filter screen 21 to be collected, so as to facilitate the subsequent unified and centralized treatment of the waste chips and chip liquid. When it is necessary to adjust the conveying flow rate of the chip liquid, the adjusting sleeve 20 is rotated, and the side wall of the stop groove 17 opened on one side of the adjusting sleeve 20 will squeeze the side wall of the stop rod 12, so that the stop rod 12 slides out of the stop groove 17 and enters the annular groove 16 to slide, and at the same time, the stop rod 12 will push the push spring 11 set on the outer side to After the screw sleeve 10 is movably sleeved on the outside of the screw rod 9 through a thread, and the sliding block 25 and the sliding groove 26 form a mutual limit to the top sleeve 19, the screw sleeve 10 will drive the top sleeve 19 to slide along the screw rod 9, and then the top sleeve 19 will push the baffle block 13 to slide, and then the baffle block 13 will drive the matching block 24 set on one side to slide in the matching groove 23. Due to the special structural design of the matching block 24 and the matching groove 23, when the matching block 24 slides in the matching groove 23, it will drive the baffle block 13 to move closer to the inside, and at the same time, the baffle block The sliding block 25 connected to one end of 13 will slide in the sliding groove 26, and then the multiple conical blocks 14 will gradually come together, and then the conical spring 15 connected to one side of the conical block 14 will be slowly squeezed, so that the gap between the conical springs 15 will gradually shrink, and at the same time, the movement of the baffle block 13 will gradually reduce the cross-sectional area of ​​the corresponding position in the sleeve 18, thereby changing the flow rate of the cutting fluid. After proper adjustment, stop rotating the adjusting sleeve 20, and the push spring 11 will drive the stop rod 12 to reset, so that the stop rod 12 is engaged in the corresponding stop groove 17, thereby preventing the adjusting sleeve 20 from rotating easily.

[0038] See also Figure 1 and Figure 3As an implementation method of a quick-change device for a steel structure CNC cutting machine: the quick-change device includes a spiral groove 27, a sliding ball 28, a rotating sleeve 29, a fixed sleeve 30, a fixed rod 31, a movable groove 32, a ball 33 and a card slot 34, the spiral groove 27 is opened on the side wall of the fixed sleeve 30, the sliding ball 28 is fixedly arranged on the inner side of the rotating sleeve 29, and the sliding ball 28 is slidably arranged in the spiral groove 27, the rotating sleeve 29 is movably sleeved on the outer side of the fixed sleeve 30, the movable groove 32 is opened on the side wall of the fixed sleeve 30, the ball 33 is movably installed in the movable groove 32, and the card slot 34 is opened on the side wall of the fixed rod 31.

[0039] A second spring 35 is provided on one side of the rotating sleeve 29 , and the other end of the second spring 35 is in contact with and connected to the fixing sleeve 30 .

[0040] A handle 36 is provided on one side of the fixing sleeve 30 , and positioning rods 37 are provided on both sides of the handle 36 . A first spring 38 is sleeved on the outer side of the positioning rod 37 . A positioning groove 39 is provided on the top of the rotating sleeve 29 , and one end of the positioning rod 37 is inserted into the positioning groove 39 .

[0041] More specifically, when the cutting blade 6 needs to be replaced, the handle 36 is first lifted, and then the handle 36 drives the positioning rod 37 to disengage from the positioning groove 39, and at the same time the positioning rod 37 compresses the first spring 38 provided on the outer sleeve, and then the rotating sleeve 29 is rotated, the rotating sleeve 29 drives the sliding ball 28 provided on the inner side to move in the spiral groove 27, and then the rotating sleeve 29 spirally rises along the spiral groove 27, and when the rotating sleeve 29 cannot move further, the wider part inside the rotating sleeve 29 is aligned with the position of the ball 33 The rotating sleeve 29 will then be pulled, the rotating sleeve 29 will drive the fixed sleeve 30 to move, and then the side wall of the slot 34 will squeeze the ball 33, and then the ball 33 will roll in the movable slot 32, and at the same time the ball 33 will be separated from the slot 34, and then the rotating sleeve 29 will be continued to be pulled, the rotating sleeve 29 will drive the fixed sleeve 30 to be separated from one side of the fixed rod 31, and then the cutting knife 6 will be removed. When the cutting knife 6 is replaced, refer to the above process to reinstall the cutting knife 6 to the output end of the drive assembly 5.

[0042] In summary, when the overall equipment is in use or running: when the equipment needs to be used to cut a steel structure product, first fix the product above the support plate 2 through an external positioning device, then turn on the drive assembly 5, so that the drive assembly 5 cuts the product through the cutting knife 6 set at the output end, and at the same time turn on the external conveying device, so that the conveying device conveys the cutting liquid to the nozzle 7 through the conveying pipe 8, and then sprays it to the cutting position of the cutting knife 6 through the nozzle 7, and at the same time, the position and angle of the nozzle 7 can be fine-tuned by the setting of the bellows 22, and then the cutting liquid will cool the cutting knife 6, and at the same time, the spraying position The cutting liquid will carry the cut waste chips and usually flow into the collecting bin 4 arranged below, and then the waste chips will be left above the filter screen 21 arranged in the collecting bin 4, and the cutting liquid will enter the bottom of the collecting bin 4 through the filter holes opened on the filter screen 21 to be collected, so as to facilitate the subsequent unified and centralized treatment of the waste chips and cutting liquid. When it is necessary to adjust the conveying flow rate of the cutting liquid, the adjusting sleeve 20 is rotated, and the side wall of the stop groove 17 opened on one side of the adjusting sleeve 20 will squeeze the side wall of the stop rod 12, so that the stop rod 12 slides out of the stop groove 17 and enters the annular groove 16 to slide, and at the same time, the stop rod 12 will push the push spring set on the outer side. 11 is extruded, and then the adjusting sleeve 20 will drive the screw rod 9 to rotate. Since the screw sleeve 10 is movably sleeved on the outside of the screw rod 9 through a thread, and the sliding block 25 and the sliding groove 26 form a mutual limit to the top sleeve 19, then the screw sleeve 10 will drive the top sleeve 19 to slide along the screw rod 9, and then the top sleeve 19 will push the baffle block 13 to slide, and then the baffle block 13 will drive the matching block 24 set on one side to slide in the matching groove 23. Due to the special structural design of the matching block 24 and the matching groove 23, when the matching block 24 slides in the matching groove 23, it will drive the baffle block 13 to move closer to the inside, and at the same time, the baffle block 13 will move closer to the inside. The sliding block 25 connected to one end of the flow block 13 will slide in the sliding groove 26, and then the multiple conical blocks 14 will gradually come together, and then the conical spring 15 connected to one side of the conical block 14 will be slowly squeezed, so that the gap between the conical springs 15 will gradually shrink, and at the same time, the movement of the flow block 13 will gradually reduce the cross-sectional area of ​​the corresponding position in the sleeve 18, thereby changing the flow rate of the cutting fluid. After proper adjustment, stop rotating the adjusting sleeve 20, and the push spring 11 will drive the stop rod 12 to reset, so that the stop rod 12 is engaged in the corresponding stop groove 17, thereby preventing the adjusting sleeve 20 from rotating easily.

[0043] When the cutting blade 6 needs to be replaced, the handle 36 is first lifted, and then the handle 36 drives the positioning rod 37 to disengage from the positioning groove 39, and at the same time the positioning rod 37 compresses the first spring 38 sleeved on the outside, and then the rotating sleeve 29 is rotated, the rotating sleeve 29 drives the sliding ball 28 arranged on the inside to move in the spiral groove 27, and then the rotating sleeve 29 spirally rises along the spiral groove 27. When the rotating sleeve 29 cannot move further, the wider part inside the rotating sleeve 29 corresponds to the position of the ball 33, and then Then pull the rotating sleeve 29, the rotating sleeve 29 will drive the fixed sleeve 30 to move, and then the side wall of the slot 34 will squeeze the ball 33, and then the ball 33 will roll in the movable slot 32, and at the same time the ball 33 will be separated from the slot 34, and then continue to pull the rotating sleeve 29, the rotating sleeve 29 will drive the fixed sleeve 30 to separate from one side of the fixed rod 31, and then remove the cutting knife 6. When the cutting knife 6 is replaced, refer to the above process to reinstall the cutting knife 6 to the output end of the drive assembly 5.

[0044] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A steel structure CNC cutting machine, comprising a machine tool (1), characterized in that: The machine tool (1) is provided with a processing device, the processing device comprising a support plate (2), a through groove (3) and a collection bin (4), the through groove (3) being arranged between the support plates (2), the collection bin (4) being arranged inside the machine tool (1), the top of the machine tool (1) being provided with a driving assembly (5), the bottom of the driving assembly (5) being provided with a cutting knife (6), one side of the cutting knife (6) being provided with a quick-change device, one side of the driving assembly (5) being provided with a nozzle (7), the top of the nozzle (7) being provided with a delivery pipe (8), one end of the delivery pipe (8) being connected with a regulating device, the regulating device comprising a screw (9), a screw sleeve (10), a push spring (11), a stopper (12), a stopper (13), a stopper (14), and a stopper (15). A movable rod (12), a flow block (13), a guide mechanism, a conical block (14), a conical spring (15), an annular groove (16), a stop groove (17), a sleeve (18), a top sleeve (19) and an adjusting sleeve (20); the screw sleeve (10) is sleeved on the outside of the screw rod (9) through a threaded sleeve, the push spring (11) is sleeved on the outside of the stop rod (12), the flow block (13) is installed in the sleeve (18), the conical block (14) is connected to the flow block (13) through the conical spring (15), a plurality of stop grooves (17) are provided in the annular groove (16), the top sleeve (19) is arranged in the sleeve (18), and the adjusting sleeve (20) is movably connected to one end of the sleeve (18).

2. A steel structure CNC cutting machine according to claim 1, characterized in that: A filter screen (21) is provided below the support plate (2), and the filter screen (21) is detachably installed in the collection bin (4).

3. A steel structure CNC cutting machine according to claim 2, characterized in that: A bellows (22) is provided above the nozzle (7), and the top end of the bellows (22) is connected to the sleeve (18).

4. The steel structure CNC cutting machine according to claim 1, characterized in that: The guide mechanism comprises a matching groove (23) and a matching block (24); the matching groove (23) is provided in the sleeve (18); the matching block (24) is fixedly connected to one side of the baffle block (13); and the matching block (24) is slidably installed in the matching groove (23).

5. A steel structure CNC cutting machine according to claim 4, characterized in that: A sliding block (25) is provided at one end of the baffle block (13), a sliding groove (26) is provided at one side of the top sleeve (19), and the sliding block (25) is slidably installed in the sliding groove (26).

6. A steel structure CNC cutting machine according to any one of claims 1 to 5, characterized in that: The quick-change device comprises a spiral groove (27), a sliding ball (28), a rotating sleeve (29), a fixed sleeve (30), a fixed rod (31), a movable groove (32), a ball (33) and a clamping groove (34); the spiral groove (27) is arranged on the side wall of the fixed sleeve (30); the sliding ball (28) is fixedly arranged on the inner side of the rotating sleeve (29), and the sliding ball (28) is slidably arranged in the spiral groove (27); the rotating sleeve (29) is movably sleeved on the outer side of the fixed sleeve (30); the movable groove (32) is arranged on the side wall of the fixed sleeve (30); the ball (33) is movably installed in the movable groove (32); and the clamping groove (34) is arranged on the side wall of the fixed rod (31).

7. A steel structure CNC cutting machine according to claim 6, characterized in that: A second spring (35) is provided on one side of the rotating sleeve (29), and the other end of the second spring (35) is in contact with and connected to the fixed sleeve (30).

8. The steel structure CNC cutting machine according to claim 7, characterized in that: A handle (36) is provided on one side of the fixed sleeve (30), positioning rods (37) are provided on both sides of the handle (36), a first spring (38) is sleeved on the outer side of the positioning rod (37), a positioning groove (39) is provided at the top end of the rotating sleeve (29), and one end of the positioning rod (37) is inserted into the positioning groove (39).

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