Laser cutting machine for steel pipe machining and cutting method of laser cutting machine

Abstract

The laser cutting machine comprises a steel pipe clamp, the front end of the steel pipe clamp is provided with a laser assembly and a pollution discharge structure arranged below the laser assembly in a penetrating mode and arranged on a steel pipe, the pollution discharge structure communicates and extends towards the side away from the steel pipe, and the top end of the pollution discharge structure is provided with an elastic adaptive end corresponding to the inner shape of the steel pipe; a plurality of positioning structures are arranged on the two sides of the pollution discharge structure and abut against the inner side wall of the cutting section of the steel pipe, a linkage structure driving the positioning structures to move is arranged at the front end of the steel pipe, and a material returning structure is elastically connected to the movable end of the linkage structure; the material returning structure abuts against the front end wall of the steel pipe and is elastically compressed along the linkage structure, and the material returning structure is provided with a locking structure which abuts against and is positioned on the linkage structure; and when the positioning structure is separated from the steel pipe, the locking structure is unlocked, and the material returning structure drives the steel pipe to be away from the linkage structure for discharging. The laser cutting machine has the effects that the laser cutting machine goes deep into the steel pipe for dust removal treatment, and the cut steel pipe can be conveniently returned.

Description

Technical Field

[0001] The present application relates to the technical field of steel pipe cutting, and in particular to a laser cutting machine and a cutting method thereof for steel pipe processing. Background Art

[0002] The laser cutting machine focuses the laser emitted from the laser into a high-power density laser beam through the optical path system. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach its melting point or boiling point. At the same time, the high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the relative position of the beam and the workpiece moves, a cut is eventually formed in the material, thereby achieving the purpose of cutting.

[0003] When the steel pipe is cut, the jetted airflow will enter the inside of the steel pipe. The dust removal efficiency from the outside is very low, but the existing dust removal device still tends to perform dust removal on the outside of the steel pipe. The reason is that the dust removal device that goes deep into the inside of the steel pipe will fall onto the dust removal device after the steel pipe is cut, making it difficult to withdraw the steel pipe. In response to the above-mentioned related technologies, the applicant has proposed a laser cutting machine that can go deep into the steel pipe for dust removal and facilitate the withdrawal of the cut steel pipe. Summary of the invention

[0004] In order to provide a laser cutting machine for deep dust removal inside a steel pipe and to facilitate the return of the cut steel pipe, the present application provides a laser cutting machine for steel pipe processing and a cutting method thereof.

[0005] The present application provides a laser cutting machine for steel pipe processing and a cutting method thereof, which adopts the following technical solutions:

[0006] A laser cutting machine for steel pipe processing comprises a steel pipe clamp, a laser component is provided at the front end of the steel pipe clamp, and a sewage structure corresponding to the bottom of the laser component and penetrating the front end of the steel pipe, the sewage structure is arranged in an inverted cone shape and the bottom opening is connected and extends to the side away from the steel pipe, and an adapter end head which elastically corresponds to the internal shape of the steel pipe is provided at the top of the sewage structure, and a cooling structure for injecting coolant is arranged in the adapter end head and connected; multiple groups of positioning structures are provided on both sides of the sewage structure, the positioning structure abuts against the inner wall of the cutting section of the steel pipe, and a linkage structure which drives the positioning structure to move laterally and is connected to the steel pipe at the front end of the steel pipe, and a material withdrawal structure is elastically connected to the movable end of the linkage structure; the material withdrawal abuts against the front end wall of the steel pipe and is elastically compressed along the linkage structure, and a locking structure which abuts against and is positioned on the linkage structure is provided on the material withdrawal structure; when the positioning structure is separated from the steel pipe, the locking structure is unlocked, and the material withdrawal structure drives the steel pipe away from the linkage structure and discharges the material.

[0007] By adopting the above technical scheme, the adapter end cooperates with the sewage discharge structure to effectively discharge the waste and impurities generated in the cutting process, keep the cutting area clean, reduce secondary pollution, and improve the cutting quality. The cooling structure can provide cooling in time during the cutting process to prevent sparks from sticking and causing damage to the sewage discharge structure. The design of the adapter end elastically corresponding to the internal shape of the steel pipe enables the equipment to adapt to steel pipes of different diameters and shapes, thereby improving the versatility and flexibility of the equipment. The linkage structure drives the positioning structure to move laterally and lift and lower it to connect to the steel pipe, realizing automatic positioning and adjustment. The material withdrawal structure abuts against the front end wall of the steel pipe and is elastically compressed along the linkage structure. When the positioning structure is separated from the steel pipe, the locking structure is unlocked, and the material withdrawal structure drives the steel pipe away from the linkage structure and unloads the material. This design ensures that the steel pipe can be unloaded safely and quickly after the cutting is completed.

[0008] Preferably, the sewage discharge structure includes a sewage discharge port, a separation box, an exhaust port and a liquid discharge port. The sewage discharge port is arranged in an inverted cone shape and is opened at the top and bottom. The bottom end of the separation box is connected to the bottom end of the sewage discharge port and extends upward. The exhaust port is connected to the top end of the side wall of the separation box and extends toward one side of the linkage structure. The liquid discharge port is connected to the bottom end of the side wall of the separation box and extends toward one side of the linkage structure.

[0009] Preferably, the cooling structure includes a liquid storage ring and a liquid inlet, the liquid storage ring is sleeved on the outside of the sewage outlet, and the inner bottom wall of the liquid storage ring is lower than the top of the sewage outlet; the liquid inlet passes through and is connected to the bottom wall of the liquid storage ring, and extends toward one side of the linkage structure.

[0010] Preferably, the adapter end includes a support rod, an elastic rubber ring and an abutment slide, the support rods are respectively fixed to the two ends of the liquid storage ring and are respectively arranged corresponding to the center of the steel pipe; the elastic rubber ring is sleeved on the liquid storage ring and extends upward, and the support rod accommodates and is fixed to the elastic rubber ring; the abutment slide is fixed to the top of the elastic rubber ring, the abutment slide abuts against the inner wall of the steel pipe, and deforms with the shape of the top of the elastic rubber ring.

[0011] Preferably, the linkage structure includes a linkage bracket, an extension rod, a control screw and a control sliding rod, the linkage bracket is fixed at the front end of the steel pipe clamp and extends upward; the extension rod is lifted and connected to the linkage bracket and extends toward one side of the steel pipe clamp; the control sliding rod is passed through and laterally slidably connected to the extension rod, and the sewage outlet is fixed to the control sliding rod; one end of the control screw is rotatably connected to the extension rod, and the other end is laterally screwed to the control sliding rod.

[0012] Preferably, the positioning structure includes a clamp-shaped bracket, a sliding ball, an adjusting connecting rod, a lifting plate and a driving screw. The bottom ends of the clamp-shaped bracket rotate relative to each other, and the top ends extend respectively toward the upper left and right sides of the steel pipe; the sliding balls are respectively accommodated and rotatably connected to the ends of the clamp-shaped bracket; one end of the adjusting connecting rod is respectively rotatably connected to the two sides of the clamp-shaped bracket, and the other ends are close to each other and rotatably connected; the lifting plate is lifted and connected to the control sliding rod and fixed to the mutually rotating ends of the adjusting connecting rod; the driving screw is vertically arranged and rotatably connected to the control sliding rod, and the driving screw is screwed to the lifting plate.

[0013] Preferably, the material return structure includes a material return bracket and a material return spring. The material return bracket slides along the control slide rod away from one end of the steel pipe clamp. The material return bracket extends upward at both ends respectively. A group of clamp-shaped brackets are provided on the side of the material return bracket close to the sewage outlet; one end of the material return spring is fixed to the control slide rod, and the other end drives the material return bracket close to the steel pipe clamp.

[0014] Preferably, the locking structure includes a brush head, a solenoid valve and a friction plate, the brush heads are respectively inserted through the two ends of the clamp-shaped bracket of the corresponding material return bracket and abut against the corresponding sliding ball; the solenoid valve is fixed to the material return bracket and electrically connected to the brush head; the friction plate is fixed to the movable end of the solenoid valve; when the steel pipe abuts against the sliding balls at both ends, the solenoid valve is connected and the friction plate abuts against the control sliding rod.

[0015] Preferably, the material withdrawal structure also includes a support frame, which is mounted on the front end of the steel pipe clamp and is located below the extension rod, and the support frame and the steel pipe clamp are laterally staggered.

[0016] A cutting method of a laser cutting machine for steel pipe processing, comprising: S1: a steel pipe clamp clamps the steel pipe, a driving screw rotates to drive a clamp-shaped bracket to open and close, so that the arc formed between the sliding ball at the top of the clamp-shaped bracket and the support rod corresponds to the inner wall of the steel pipe, then the sliding rod is controlled to slide and penetrate the inner side of the steel pipe, so that the sewage outlet is below its laser component, the extension rod rises and drives the clamp-shaped bracket to abut against the inner wall of the steel pipe, and at the same time the support rod abuts against the top of the inner wall of the steel pipe, the elastic rubber ring fits the inner wall of the steel pipe to enhance the sewage discharge effect and prevent leakage, the abutting slide reduces the resistance between the steel pipe during rotation and cutting, the liquid inlet injects chip liquid into the liquid storage ring, the chip liquid covers the inside of the sewage outlet, the sparks generated during laser cutting are cooled by the chip liquid to avoid sticking to the sewage outlet, the sewage outlet also absorbs harmful gases during cutting downward through the action of the exhaust port, the harmful gases and the chip liquid enter the separation box for separation and discharge.

[0017] S2: When the control slide rod is inserted into the steel pipe, the material return bracket abuts against the end wall of the steel pipe, the steel pipe is fixed by the steel pipe clamp, and the material return bracket compresses the material return spring to keep the material return bracket and its corresponding clamp bracket abutting against the front end of the steel pipe cutting section; when the clamp bracket is driven by the extension rod to rise and abut against the inner wall of the steel pipe, the clamp bracket corresponding to the material return bracket abuts against the inner wall of the steel pipe, at this time, the sliding balls connected to the brush heads on both sides realize circuit connection through the inner wall of the steel pipe, and the solenoid valve starts to push the friction plate abutting against the control slide rod to lock the position of the material return bracket.

[0018] S3: After the cutting of the steel pipe cutting section is completed, the steel pipe cutting section is separated from the steel pipe clamp, and the steel pipe cutting section is supported by the clamp-shaped bracket. The material return bracket remains locked, and the control slide bar is retreated, and the extension rod is lowered, so that the cutting section of the steel pipe is lowered and falls on the support frame. The cutting section of the steel pipe is supported by the support frame and separated from the clamp-shaped bracket on the retreat bracket. At the same time, the steel pipe is separated from the clamp-shaped bracket, and the brush heads on both sides lose the conduction of the steel pipe and become closed circuits. The solenoid valve releases the friction plate, and the material return spring loses the positioning of the friction plate, driving the material return bracket to push the cutting section of the steel pipe toward the sewage outlet to complete the material return.

[0019] By adopting the above technical scheme, the screw is driven to rotate to drive the clamp-shaped bracket to open and close, so that the arc formed between the sliding ball at the top of the clamp-shaped bracket and the support rod corresponds to the inner wall of the steel pipe, and the cut steel pipe can be effectively supported; the liquid inlet injects chip liquid into the liquid storage ring, and the chip liquid covers the inside of the drain port. The sparks generated during laser cutting are cooled by the chip liquid to avoid sticking to the drain port; the drain port absorbs harmful gases during cutting downward through the exhaust port, and the harmful gases and chip liquid enter the separation box for separation and discharge, reducing environmental pollution; the abutment slide reduces the resistance between the steel pipes during rotation cutting, making the cutting process smoother, reducing mechanical wear, and extending the life of the equipment; it also has the advantages of high degree of automation, safe and reliable material return, and convenient maintenance.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The adapter end cooperates with the sewage discharge structure to effectively discharge the waste and impurities generated during the cutting process, keep the cutting area clean, reduce secondary pollution, and improve the cutting quality. The cooling structure can provide timely cooling during the cutting process to prevent sparks from sticking and causing damage to the sewage discharge structure. The design of the adapter end elastically corresponding to the internal shape of the steel pipe enables the equipment to adapt to steel pipes of different diameters and shapes, improving the versatility and flexibility of the equipment. The linkage structure drives the positioning structure to move horizontally and lift and connect to the steel pipe, realizing automatic positioning and adjustment. The material withdrawal structure abuts against the front end wall of the steel pipe and is elastically compressed along the linkage structure. When the positioning structure is separated from the steel pipe, the locking structure is unlocked, and the material withdrawal structure drives the steel pipe away from the linkage structure and unloads. This design ensures that the steel pipe can be unloaded safely and quickly after the cutting is completed;

[0022] 2. The screw is driven to rotate to open and close the clamp bracket, so that the arc formed between the sliding ball at the top of the clamp bracket and the support rod corresponds to the inner wall of the steel pipe, and the cut steel pipe can be effectively supported; the liquid inlet injects chip liquid into the liquid storage ring, and the chip liquid covers the inside of the drain port. The sparks generated during laser cutting are cooled by the chip liquid to avoid sticking to the drain port; the drain port absorbs harmful gases during cutting downward through the exhaust port, and the harmful gases and chip liquid enter the separation box for separation and discharge, reducing environmental pollution; the abutment slide reduces the resistance between the steel pipes during rotation cutting, making the cutting process smoother, reducing mechanical wear, and extending the life of the equipment; it also has the advantages of high degree of automation, safe and reliable material withdrawal, and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram showing a sewage discharge structure in an embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of an embodiment of the present application in which a steel pipe is hidden and the relationship between the linkage structure and the material withdrawal structure is shown;

[0026] Figure 4 yes Figure 3 A schematic diagram of part B;

[0027] Figure 5 yes Figure 2 Schematic diagram of part A.

[0028] Explanation of the accompanying drawings: 1. Steel pipe clamp; 2. Laser assembly; 3. Drain structure; 31. Drain port; 32. Separation box; 33. Exhaust port; 34. Drain port; 4. Positioning structure; 41. Clamp bracket; 42. Sliding ball; 43. Adjusting connecting rod; 44. Lifting plate; 45. Driving screw; 5. Linkage structure; 51. Linkage bracket; 52. Extension rod; 53. Control screw; 54. Control slide rod; 6. Material withdrawal structure; 61. Material withdrawal bracket; 62. Material withdrawal spring; 63. Support frame; 7. Locking structure; 71. Brush head; 72. Solenoid valve; 73. Friction plate; 8. Adapter end; 81. Support rod; 82. Elastic rubber ring; 83. Abutting slide; 9. Cooling structure; 91. Liquid storage ring; 92. Liquid inlet;. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The present application discloses a laser cutting machine and a cutting method for steel pipe processing, referring to Figure 1 ,2 , including a steel pipe clamp 1, a laser component 2 is provided at the front end of the steel pipe clamp 1, and a sewage discharge structure 3 corresponding to the bottom of the laser component 2 and penetrating the front end of the steel pipe, and the sewage discharge structure 3 absorbs harmful substances generated during cutting.

[0031] Reference Figure 2 , 4 The sewage discharge structure 3 includes a sewage discharge port 31, a separation box 32, an exhaust port 33 and a liquid discharge port 34. The sewage discharge port 31 is set in an inverted cone shape and has upper and lower openings; the sewage discharge port 31 is provided with a cooling system to prevent splashing sparks from adhering, and the cooling structure 9 includes a liquid storage ring 91 and a liquid inlet 92. The liquid storage ring 91 is sleeved on the outside of the sewage discharge port 31, and the inner bottom wall of the liquid storage ring 91 is lower than the top of the sewage discharge port 31; the liquid inlet 92 is penetrated and connected to the bottom wall of the liquid storage ring 91, and extends toward the side away from the steel pipe clamp 1 for liquid supply. The liquid inlet 92 adds chip liquid into the liquid storage ring 91, and the liquid storage ring 91 accumulates the chip liquid and enters the inner side of the sewage discharge port 31 more evenly. Before the spark contacts the sewage discharge port 31, it will be quickly cooled by the chip liquid, thereby preventing the spark from sticking to the inner side of the sewage discharge port 31.

[0032] Reference Figure 2 , 4 The bottom end of the separation box 32 is connected to the bottom end of the drain port 31 and extends upward. The separation box 32 separates gas and liquid, with the gas located at the top and the liquid located at the bottom; the exhaust port 33 is connected to the top of the side wall of the separation box 32 and extends toward one side of the linkage mechanism, thereby recovering the waste gas from the cutting port; the liquid discharge port 34 is connected to the bottom end of the side wall of the separation box 32 and extends toward one side of the linkage mechanism, thereby recovering the cutting liquid entering the separation box 32.

[0033] Reference Figure 2 , 4 A matching end 8 elastically corresponding to the internal shape of the steel pipe is provided at the top of the sewage outlet 31. The matching end 8 includes a support rod 81, an elastic rubber ring 82 and an abutting slide 83. The support rod 81 is respectively fixed to the two ends of the liquid storage ring 91 and is respectively arranged corresponding to the center of the steel pipe, thereby corresponding to the highest point of the inner wall of the steel pipe; the elastic rubber ring 82 is sleeved on the liquid storage ring 91 and extends upward, and the support rod 81 accommodates and is fixed to the elastic rubber ring 82, providing support for the elastic rubber ring 82 to be close to the inner wall of the steel pipe; the abutting slide 83 is fixed to the top of the elastic rubber ring 82, the abutting slide 83 abuts against the inner wall of the steel pipe, and deforms with the shape of the top of the elastic rubber ring 82, thereby reducing the friction generated when the steel pipe rotates.

[0034] Reference Figure 1 , 3The sewage outlet 31 is driven by the linkage structure 5 to its laser component 2. The linkage structure 5 includes a linkage bracket 51, an extension rod 52, a control screw 53 and a control slide bar 54. The linkage bracket 51 is fixed to the front end of the steel pipe clamp 1 and extends upward; the extension rod 52 is lifted and connected to the linkage bracket 51 and extends toward one side of the steel pipe clamp 1 to adapt to changes in the size of the steel pipe; the control slide bar 54 is penetrated and laterally slidably connected to the extension rod 52, and the sewage outlet 31 is fixed to the control slide bar 54; one end of the control screw 53 is rotatably connected to the extension rod 52, and the other end is laterally screwed to the control slide bar 54. The control screw 53 can accurately drive the position of the control slide bar 54 through the control of the servo motor to control the position of the sewage outlet 31.

[0035] Reference Figure 2 , 4 The control slide bar 54 is provided with a positioning structure 4 for positioning the steel pipe cutting section. The positioning structure 4 includes a clamp bracket 41, a sliding ball 42, an adjusting connecting rod 43, a lifting plate 44 and a driving screw 45. The bottom ends of the clamp bracket 41 rotate with each other, and the top ends extend toward the upper left and right sides of the steel pipe respectively; the sliding balls 42 are respectively accommodated and rotatably connected to the ends of the clamp bracket 41, thereby preventing the steel pipe and the clamp bracket 41 from sliding and rubbing; one end of the adjusting connecting rod 43 is respectively rotatably connected to the two sides of the clamp bracket 41, and the other end is close to each other and rotatably connected; the lifting plate 44 is lifted and connected to the control slide bar 54 and fixed to the mutually rotating ends of the adjusting connecting rod 43; the driving screw 45 is vertically arranged and rotatably connected to the control slide bar 54, and the driving screw 45 is screwed to the lifting plate 44, and the height of the inner wall of the steel pipe corresponding to the clamp bracket 41 is controlled by adjusting the height of the lifting plate 44; when the steel pipe is cut, the steel pipe is placed on the clamp bracket 41 without a tendency to fall.

[0036] Reference Figure 1 , 3 A material withdrawal structure 6 is also provided on the control slide bar 54, and the material withdrawal structure 6 includes a material withdrawal bracket 61, a material withdrawal spring 62 and a support bracket 63. The material withdrawal bracket 61 slides along the control slide bar 54 away from one end of the steel pipe clamp 1, and the material withdrawal bracket 61 extends upward at both ends. A group of clamp-shaped brackets 41 are provided on the side of the material withdrawal bracket 61 close to the sewage outlet 31, so that the material withdrawal bracket 61 corresponding to the steel pipe cutting section is supported by the clamp-shaped bracket 41 to maintain the stability of the steel pipe cutting section.

[0037] Reference Figure 3 , 5The material return bracket 61 is positioned on the control slide rod 54 through the locking structure 7. The locking structure 7 includes a brush head 71, a solenoid valve 72 and a friction plate 73. The brush head 71 is respectively penetrated through the two ends of the clamp bracket 41 corresponding to the material return bracket 61 and abuts against the corresponding sliding ball 42; the solenoid valve 72 is fixed to the material return bracket 61 and electrically connected to the brush head 71; the friction plate 73 is fixed to the movable end of the solenoid valve 72; when the steel pipe abuts against the sliding balls 42 at both ends, the solenoid valve 72 is connected, and the friction plate 73 abuts against the control slide rod 54.

[0038] Reference Figure 1 , 3 One end of the material return spring 62 is fixed to the control slide bar 54, and the other end drives the material return bracket 61 to approach the steel pipe clamp 1; the support frame 63 is erected at the front end of the steel pipe clamp 1, and is located below the extension rod 52, and the support frame 63 and the steel pipe clamp 1 are laterally offset; when the sewage outlet 31 is close to the laser assembly 2, the material return bracket 61 abuts against the end of the steel pipe and compresses; when the clamp bracket 41 abuts against the inner wall of the steel pipe, the solenoid valve 72 locks the friction plate 73; when the steel pipe is placed on the support frame 63, the solenoid valve 72 unlocks the friction plate 73, and the material return bracket 61 is driven by the material return spring 62 to unload the material.

[0039] The working process of the present application is as follows: S1: the steel pipe clamp 1 clamps the steel pipe, drives the screw rod 45 to rotate and drives the clamp bracket 41 to open and close, so that the arc formed between the sliding ball 42 at the top of the clamp bracket 41 and the support rod 81 corresponds to the inner wall of the steel pipe, so that the cut steel pipe can be effectively supported, and then the sliding rod 54 is controlled to slide and penetrate the inner side of the steel pipe, so that the sewage outlet 31 is below the laser component 2, the extension rod 52 rises and drives the clamp bracket 41 to abut against the inner wall of the steel pipe, and the support rod 81 abuts against At the top of the inner wall of the steel pipe, the elastic rubber ring 82 fits the inner wall of the steel pipe to enhance the drainage effect and prevent leakage. The abutment slide 83 reduces the resistance between the steel pipe during rotation and cutting. The liquid inlet 92 injects cutting liquid into the liquid storage ring 91. The cutting liquid covers the inside of the drainage port 31. The sparks generated during laser cutting are cooled by the cutting liquid to avoid sticking to the drainage port 31. The drainage port 31 also absorbs harmful gases during cutting downward through the action of the exhaust port 33. The harmful gases and the cutting liquid enter the separation box 32 for separation and discharge.

[0040] S2: When the control slide bar 54 is inserted into the steel pipe, the material return bracket 61 abuts against the end wall of the steel pipe, and the steel pipe is fixed by the steel pipe clamp 1. The material return bracket 61 compresses the material return spring 62, keeping the material return bracket 61 and its corresponding clamp bracket 41 abutting against the front end of the steel pipe cutting section; when the clamp bracket 41 is driven by the extension rod 52 to rise and abut against the inner wall of the steel pipe, the clamp bracket 41 corresponding to the material return bracket 61 abuts against the inner wall of the steel pipe, at this time, the sliding balls 42 connected to the brush heads 71 ​​on both sides realize circuit connection through the inner wall of the steel pipe, and the solenoid valve 72 starts to push the friction plate 73 to abut against the control slide bar 54, so that the position of the material return bracket 61 is locked.

[0041] S3: After the cutting of the steel pipe cutting section is completed, the steel pipe cutting section is separated from the steel pipe clamp 1, and the steel pipe cutting section is supported by the clamp bracket 41. The material return bracket 61 remains locked, and the control slide bar 54 retreats, and the extension rod 52 descends, so that the cutting section of the steel pipe descends and falls on the support frame 63. The cutting section of the steel pipe is supported by the support frame 63 and separated from the clamp bracket 41 on the retreat bracket. At the same time, the steel pipe is separated from the clamp bracket 41, and the brush heads 71 ​​on both sides lose the conduction of the steel pipe and become closed circuit, the solenoid valve 72 releases the friction plate 73, and the material return spring 62 loses the positioning of the friction plate, driving the material return bracket 61 to push the cutting section of the steel pipe toward the sewage outlet 31 to complete the material return.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser cutting machine for steel pipe processing, comprising a steel pipe clamp (1), characterized in that: The front end of the steel pipe clamp (1) is provided with a laser assembly (2), and a drainage structure (3) corresponding to the bottom of the laser assembly (2) and penetrating the front end of the steel pipe. The drainage structure (3) is arranged in an inverted cone shape and the bottom opening is connected and extends to the side away from the steel pipe. The top of the drainage structure (3) is provided with an adapter end (8) elastically corresponding to the internal shape of the steel pipe. The adapter end (8) is provided with and connected to a cooling structure (9) for injecting coolant. Multiple groups of positioning structures (4) are arranged on both sides of the drainage structure (3). The positioning structures (4) are abutted against the steel pipe cutting The inner wall of the segment is provided with a linkage structure (5) connected to the steel pipe at the front end thereof, which drives the positioning structure (4) to move laterally and lift up and down; a material-removing structure (6) is elastically connected to the movable end of the linkage structure (5); the material-removing structure abuts against the front end wall of the steel pipe and is elastically compressed along the linkage structure (5); a locking structure (7) abuts against and is positioned on the linkage structure (5); when the positioning structure (4) is separated from the steel pipe, the locking structure (7) is unlocked, and the material-removing structure (6) drives the steel pipe away from the linkage structure (5) and unloads the material.

2. A laser cutting machine for steel pipe processing according to claim 1, characterized in that: The sewage discharge structure (3) comprises a sewage discharge port (31), a separation box (32), an exhaust port (33) and a liquid discharge port (34); the sewage discharge port (31) is arranged in an inverted cone shape and is open at the top and bottom; the bottom end of the separation box (32) is connected to the bottom end of the sewage discharge port (31) and extends upward; the exhaust port (33) is connected to the top end of the side wall of the separation box (32) and extends toward one side of the linkage structure (5); the liquid discharge port (34) is connected to the bottom end of the side wall of the separation box (32) and extends toward one side of the linkage structure (5).

3. A laser cutting machine for steel pipe processing according to claim 2, characterized in that: The cooling structure (9) comprises a liquid storage ring (91) and a liquid inlet (92); the liquid storage ring (91) is sleeved on the outside of the sewage outlet (31), and the inner bottom wall of the liquid storage ring (91) is lower than the top of the sewage outlet (31); the liquid inlet (92) penetrates and is connected to the bottom wall of the liquid storage ring (91), and extends toward one side of the linkage structure (5).

4. A laser cutting machine for steel pipe processing according to claim 3, characterized in that: The adapter end (8) comprises a support rod (81), an elastic rubber ring (82) and an abutting slide (83); the support rod (81) is respectively fixed to the two ends of the liquid storage ring (91) and is respectively arranged at the center of the steel pipe; the elastic rubber ring (82) is sleeved on the liquid storage ring (91) and extends upward, and the support rod (81) accommodates and is fixed to the elastic rubber ring (82); the abutting slide (83) is fixed to the top of the elastic rubber ring (82), the abutting slide (83) abuts against the inner wall of the steel pipe, and deforms with the shape of the top of the elastic rubber ring (82).

5. The laser cutting machine for steel pipe processing according to claim 2, characterized in that: The linkage structure (5) comprises a linkage bracket (51), an extension rod (52), a control screw rod (53) and a control slide rod (54); the linkage bracket (51) is fixed to the front end of the steel pipe clamp (1) and extends upward; the extension rod (52) is connected to the linkage bracket (51) in a lifting manner and extends toward one side of the steel pipe clamp (1); the control slide rod (54) is passed through and connected to the extension rod (52) in a transverse sliding manner, and the sewage outlet (31) is fixed to the control slide rod (54); one end of the control screw rod (53) is rotatably connected to the extension rod (52), and the other end is transversely screwed to the control slide rod (54).

6. The laser cutting machine for steel pipe processing according to claim 5, characterized in that: The positioning structure (4) comprises a clamp-shaped bracket (41), a sliding ball (42), an adjusting connecting rod (43), a lifting plate (44) and a driving screw (45); the bottom ends of the clamp-shaped bracket (41) are mutually rotated, and the top ends extend toward the upper left and right sides of the steel pipe respectively; the sliding balls (42) are respectively accommodated and rotatably connected to the ends of the clamp-shaped bracket (41); one end of the adjusting connecting rod (43) is respectively rotatably connected to the two sides of the clamp-shaped bracket (41), and the other end is close to each other and rotatably connected; the lifting plate (44) is lifted and connected to the control sliding rod (54) and fixed to the mutually rotating ends of the adjusting connecting rod (43); the driving screw (45) is vertically arranged and rotatably connected to the control sliding rod (54), and the driving screw (45) is screwed to the lifting plate (44).

7. The laser cutting machine for steel pipe processing according to claim 6, characterized in that: The material-removing structure (6) comprises a material-removing bracket (61) and a material-removing spring (62). The material-removing bracket (61) slides along the control slide bar (54) away from one end of the steel pipe clamp (1). The material-removing bracket (61) extends upwards to both ends. A group of clamp-shaped brackets (41) are provided on one side of the material-removing bracket (61) close to the sewage outlet (31). One end of the material-removing spring (62) is fixed to the control slide bar (54), and the other end drives the material-removing bracket (61) to approach the steel pipe clamp (1).

8. The laser cutting machine for steel pipe processing according to claim 7, characterized in that: The locking structure (7) comprises a brush head (71), a solenoid valve (72) and a friction plate (73); the brush head (71) is respectively arranged at the two ends of the clamp-shaped bracket (41) corresponding to the material return bracket (61) and abuts against the corresponding sliding ball (42); the solenoid valve (72) is fixed to the material return bracket (61) and electrically connected to the brush head (71); the friction plate (73) is fixed to the movable end of the solenoid valve (72); when the steel pipe abuts against the sliding balls (42) at both ends, the solenoid valve (72) is connected and the friction plate (73) abuts against the control slide rod (54).

9. The laser cutting machine for steel pipe processing according to claim 5, characterized in that: The material withdrawal structure (6) further comprises a support frame (63), which is mounted on the front end of the steel pipe clamp (1) and is located below the extension rod (52), and the support frame (63) and the steel pipe clamp (1) are laterally offset.

10. A cutting method for a laser cutting machine for steel pipe processing according to any one of claims 1 to 9, comprising: S1: The steel pipe clamp (1) clamps the steel pipe, and the driving screw (45) rotates to drive the clamp bracket (41) to open and close, so that the arc formed between the sliding ball (42) at the top of the clamp bracket (41) and the support rod (81) corresponds to the inner wall of the steel pipe. Then, the sliding rod (54) is controlled to slide and penetrate the inner side of the steel pipe, so that the sewage outlet (31) is under the laser assembly (2). The extension rod (52) rises and drives the clamp bracket (41) to abut against the inner wall of the steel pipe. At the same time, the support rod (81) abuts against the top of the inner wall of the steel pipe, and the elastic The rubber ring (82) fits the inner wall of the steel pipe to enhance the drainage effect and prevent leakage, and the abutment slide (83) reduces the resistance between the steel pipe during rotation and cutting. The liquid inlet (92) injects cutting liquid into the liquid storage ring (91), and the cutting liquid covers the inside of the drainage port (31). The sparks generated during laser cutting are cooled by the cutting liquid to avoid adhesion to the drainage port (31). The drainage port (31) also absorbs harmful gases during cutting downwards through the action of the exhaust port (33). The harmful gases and the cutting liquid enter the separation box (32), are separated and discharged. S2: When the control slide bar (54) is inserted into the steel pipe, the material return bracket (61) abuts against the end wall of the steel pipe, the steel pipe is fixed by the steel pipe clamp (1), and the material return bracket (61) compresses the material return spring (62), so as to keep the material return bracket (61) and its corresponding clamp bracket (41) abutting against the front end of the steel pipe cutting section; when the clamp bracket (41) is driven by the extension rod (52) to rise and abut against the inner wall of the steel pipe, the clamp bracket (41) corresponding to the material return bracket (61) abuts against the inner wall of the steel pipe, at this time, the sliding balls (42) connected to the brush heads (71) on both sides realize circuit connection through the inner wall of the steel pipe, and the solenoid valve (72) starts to push the friction plate (73) to abut against the control slide bar (54), so that the position of the material return bracket (61) is locked. S3: After the cutting of the steel pipe cutting section is completed, the steel pipe cutting section is separated from the steel pipe clamp (1), the steel pipe cutting section is supported by the clamp bracket (41), the material return bracket (61) remains locked, the control slide bar (54) is retreated, the extension bar (52) is lowered, the steel pipe cutting section is lowered and falls on the support bracket (63), the steel pipe cutting section is supported by the support bracket (63) and is separated from the clamp bracket (41) on the retreat bracket, the steel pipe is separated from the clamp bracket (41) and the brush heads (71) on both sides lose the conduction of the steel pipe and become closed circuit, the electromagnetic valve (72) releases the friction plate (73), the material return spring (62) loses the positioning of the friction plate and drives the material return bracket (61) to push the steel pipe cutting section toward the sewage outlet (31) to complete the material return.

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