CN216780649U - Laser plasma multi-gun steel pipe cutting machine - Google Patents

Abstract

The utility model is suitable for the technical field of steel pipe processing, and provides a laser plasma multi-gun steel pipe cutting machine, which comprises: the main engine seat, its upper horizontal support has placed the steel pipe of waiting to cut, wherein, one side tip fixed mounting of main engine seat has rolling mechanism, just one end detachable fixed connection of steel pipe in on the rolling mechanism, it is used for passing through rolling mechanism drives the steel pipe is followed rolling mechanism's axle center is in circumferential direction is carried out at the top of main engine seat, divides into multichannel (three) way to the air supply, divide into multichannel (three) way to the cutting main circuit, and the gas circuit is controlled by the solenoid valve respectively, and the main circuit is controlled by powerful ac contactor respectively. When cutting, the three guns control the cylinder of the cutting gun to move according to time in sequence to cut. The spacing of the cutting gun can be moved manually or automatically. The cutting error rate of the cutting machine is 0.05 MM. The investment is low; the cutting cost is low.

Description

Laser plasma multi-gun steel pipe cutting machine

Technical Field

The utility model belongs to the technical field of steel pipe processing, and particularly relates to a laser plasma multi-gun steel pipe cutting machine.

Background

However, the existing steel pipe cutting equipment has high processing cost and low processing efficiency, and cannot simultaneously meet the requirement of cutting multiple parts of the same steel pipe or continuously cut and process the same steel pipe, so that the subsequent cutting operation of the steel pipe is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a laser plasma multi-gun steel tube cutting machine, which aims to solve the problems in the background technology.

The utility model is realized in this way, a laser plasma multi-gun steel tube cutting machine, including: a main machine seat, on which a steel pipe to be cut is horizontally supported and placed, wherein, a rolling mechanism is fixedly arranged at the end part of one side of the main machine seat, and one end of the steel pipe is detachably and fixedly connected on the rolling mechanism, which is used for driving the steel pipe to rotate circumferentially at the top of the host machine seat along the axis of the rolling mechanism through the rolling mechanism, a plurality of upright columns are vertically arranged on one side wall of the host machine seat at intervals along the extending direction of the side wall, the top ends of the upright columns are fixedly connected with a sliding beam, and a plurality of fixed plates are horizontally arranged on one side wall of the sliding beam close to the main machine seat in a sliding way, each fixed plate is movably connected with a cutting machine head which can extend to the upper part of the steel pipe, and each cutting machine head is provided with a cutting gun for cutting the steel pipe.

Preferably, the main chassis comprises: the multisection base that sets gradually, two sections of every adjacent setting all welded fastening between the base, and the spiro union has locking bolt, and wherein, a plurality of fixedly connected with is used for realizing between the top of base right the steel pipe carries out the slide that supports, just slidable connection is fixed with a plurality of mesa ball group on the slide.

Preferably, the table-board rolling ball group comprises a supporting block arranged on the sliding plate in a sliding mode, an inwards-concave trapezoidal groove is formed in the top of the supporting block, and two rolling balls are oppositely arranged on two symmetrical side walls of the trapezoidal groove respectively.

Preferably, the rolling mechanism includes: fixed mounting is in one of them the mount pad at base top, wherein, the mount pad is close to it is connected with chuck, symmetry to rotate on one side wall of slide the chuck be provided with driving motor on the lateral wall of mount pad, its output runs through the mount pad, and the rigid coupling in on the chuck, fixed mounting has the rotating electrical machines still at the top of mount pad, the output of rotating electrical machines with engaged with between the chuck is provided with drive chain.

Preferably, still fixed mounting has the motor of marcing in the mount pad, just the rigid coupling has to run through on the output of the motor of marcing the gear of marcing of diapire in the mount pad, wherein, be located the mount pad bottom still be provided with on the base to the slide extends, and with the rack of marcing that the gear engaged with of marcing, and, be located the bottom of mount pad is still symmetrical to be provided with two guide blocks, just still parallel set up on the mount pad in the both sides of the rack of marcing, and with two the guide rail of guide block one-to-one.

Preferably, the cutting head comprises: the rigid coupling in correspond slider on the fixed plate, wherein, every all invert in the slider has the lift cylinder, and its output runs through the slider, and the rigid coupling has the roof pressure board, the bottom fixed mounting of roof pressure board have the butt in the roof pressure spin group of steel pipe top, the roof pressure spin group includes: the bottom of the clamping block is provided with a trapezoidal embedding groove, and the rolling balls are rotatably arranged on two side walls symmetrically arranged in the embedding groove.

Preferably, a lifting motor is further arranged on the inner top wall of the slider, wherein an output end of the lifting motor is fixedly connected with a first bevel gear, a rotating shaft is further rotatably arranged between the inner walls of the slider and below the first bevel gear, a second bevel gear meshed with the first bevel gear is fixedly connected to the rotating shaft, at least one lifting gear is further arranged on the outer wall of the rotating shaft, lifting racks with the same number as the lifting gears are fixedly connected to the top of the lifting cylinder, and the lifting cylinders are driven to move vertically through mutual meshing between the lifting racks and the lifting gears.

Preferably, the cutting torch is arranged on the outer wall of one side of the sliding block, and the cutting torch is electrically connected with a plasma power supply in the main machine seat.

Preferably, still including PLC control panel, wherein, march motor, driving motor, rotating electrical machines, lift cylinder and lift motor are equallyd divide and are do not electric connection PLC control panel.

Preferably, the sliding cross member includes: the connecting plate comprises two adjacent transverse plates, a through groove communicated with each other is formed in one side wall of each transverse plate, and a connecting plate is fixedly connected between one end portions, close to the transverse plates, of the two transverse plates through bolts.

Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses a laser plasma multi-gun steel tube cutting machine which comprises:

the air source is divided into a plurality of paths (three), the cutting main circuit is divided into a plurality of paths (three), the air paths are respectively controlled by electromagnetic valves, and the main circuit is respectively controlled by a high-power alternating current contactor. When cutting, the three guns control the cylinder of the cutting gun to move according to time in sequence to cut. The spacing of the cutting gun can be moved manually or automatically. The cutting error rate of the cutting machine is 0.05 MM. The investment is low; the cutting cost is low; the cutting energy of the machine can adopt a plasma power supply to carry out gun separation (multiple guns); laser splitting (multi-fiber) laser cutting heads may also be employed. That is to say, the laser cutting power supply is replaced to be changed into a laser multi-gun (three-gun) steel pipe cutting machine.

Drawings

FIG. 1 is an elevational view of the overall construction of the present invention;

FIG. 2 is a partial front view of the present invention;

FIG. 3 is a partial top view of the present invention;

FIG. 4 is a side view of the present invention;

FIG. 5 is a partial side cross-sectional view of the present invention;

FIG. 6 is a schematic cross-sectional view of two balls on one side wall of a rolling ball set of the table top in the utility model;

FIG. 7 is a front view of the present invention;

FIG. 8 is a front, top and rear view of the sliding cross member of the present invention;

FIG. 9 is a top view of the present invention;

FIG. 10 is a schematic top view of a portion of the present invention (and a cross-sectional top view of the mounting cup);

FIG. 11 is an inside cross-sectional view of the slider of the present invention;

FIG. 12 is a diagram of the optical circuit for plasma dicing in the present invention;

FIG. 13 is a laser cut optical splitting path diagram of the present invention;

FIG. 14 is a sample view of the steel pipe of the present invention cut into different shapes and shapes;

FIG. 15 is a schematic diagram of the plasma power gun of the present invention;

in the figure:

1. a main machine base; 11. a base; 12. a slide plate;

2. a steel pipe;

3. a rolling mechanism; 31. a mounting seat; 32. a chuck; 33. a drive motor; 34. a rotating electric machine; 35. a traveling motor; 351. a traveling gear; 352. a traveling rack; 36. a guide rail;

4. a column;

5. a sliding beam; 51. a fixing plate; 52. a transverse plate; 53. a through groove; 54. a connecting plate;

6. cutting the machine head; 61. a slider; 62. a lifting cylinder; 63. a top pressure plate; 64. pressing the ball rolling group; 641. a clamping block; 642. embedding a groove; 65. a lifting motor; 651. a first bevel gear; 652. a rotating shaft; 653. a second bevel gear; 654. a lifting gear; 655. a lifting rack;

7. cutting the torch;

8. a table-board ball rolling group; 81. a support block; 82. a trapezoidal groove; 83. rolling a ball;

9. and a PLC control panel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

Referring to fig. 1-3, 7 and 9, the present invention provides a solution,

a laser plasma multi-gun steel tube cutting machine comprising: the main machine base 1 is horizontally supported and placed with a steel pipe 2 to be cut;

the main chassis 1 includes: the steel tube support comprises a plurality of sections of bases 11 which are arranged in sequence, wherein every two adjacent sections of bases 11 are welded and fixed and are in threaded connection with a locking bolt, sliding plates 12 for supporting the steel tubes 2 are fixedly connected between the tops of the bases 11, and a plurality of table-board rolling ball groups 8 are connected and fixed on the sliding plates 12 in a sliding manner;

the table top rolling ball group 8 comprises a supporting block 81 arranged on the sliding plate 12 in a sliding mode, an inward-concave trapezoidal groove 82 is formed in the top of the supporting block, and two rolling balls 83 are arranged on two symmetrical side walls of the trapezoidal groove 82 in an opposite mode respectively.

Specifically, in this embodiment, for guaranteeing to stabilize effectual support to the steel pipe 2 of predetermineeing length, therefore, be provided with the host computer seat 1 of placing steel pipe 2, wherein, preferably, host computer seat 1 is formed by the concatenation of multiunit base 11, specifically do, host computer seat 1 is formed by three section (multisection) base 11 mutual equipment welding, so that follow-up can conveniently dismantle and install when shifting equipment, wherein, connect fixedly through the welded mode between two bases 11 of every adjacent setting, and simultaneously, after the welding is accomplished, two bases 11 of adjacent setting are locked fixedly through the locking bolt, thereby the effectual stability of having guaranteed host computer seat 1 overall structure, avoid follow-up steel pipe 2 that causes to put the unstable condition and take place.

It should be noted that each section of the base 11 is hollow, and therefore, it is preferable that components necessary for operation, such as a plasma power supply and an air pump, be placed in the base 11, and that a shield plate be provided outside the base 11 to shield the components necessary for operation.

It will be appreciated that on top of the three-segment base 11, there is also fixedly mounted a slide plate 12, wherein the length of the slide plate 12 preferably, does not exceed the total length of the three-segment base 11, moreover, a plurality of table-board rolling ball groups 8 are arranged above the sliding plate 12 in a sliding way in sequence, wherein each table rolling ball group 8 is provided with a supporting block 81 which can be arranged on the sliding plate 12 in a sliding way, the top of the steel tube is provided with a trapezoidal groove 82 which can accommodate part of the outer wall of the steel tube 2, in practice, the outer wall of the steel tube 2 is embedded in the trapezoidal groove 82, and, a plurality of rolling balls 83 are oppositely arranged on the inner side walls symmetrically arranged at the two sides of the trapezoidal groove 82, the rolling balls 83 are arranged on the outer wall of the steel pipe 2 in an abutting way, the effect is that when the steel pipe 2 rotates, the friction between the steel pipe 2 and the supporting block 81 can be reduced by the rolling balls 83, thereby ensuring the precision of the steel pipe 2 when cutting.

As a preferable solution of the above embodiment, in the present embodiment, referring to fig. 6, the number of the balls 83 on one side inner wall of the trapezoidal groove 82 is preferably two, which can be replaced by actual work requirement of a worker, and is not limited too much in the present embodiment.

Referring to fig. 1-3, 7, 9 and 11, a rolling mechanism 3 is fixedly installed at an end portion of one side of the main machine base 1, and one end of the steel pipe 2 is detachably and fixedly connected to the rolling mechanism 3, and is used for driving the steel pipe 2 to circumferentially rotate at the top of the main machine base 1 along an axis of the rolling mechanism 3 through the rolling mechanism 3;

the rolling mechanism 3 includes: the mounting structure comprises a mounting base 31 fixedly mounted at the top of one of the bases 11, wherein a chuck 32 is rotatably connected to one side wall of the mounting base 31 close to the sliding plate 12, a driving motor 33 is arranged on one side wall of the mounting base 31 of the symmetrical chuck 32, the output end of the driving motor runs through the mounting base 31 and is fixedly connected to the chuck 32, a rotating motor 34 is fixedly mounted at the top of the mounting base 31, and a transmission chain is arranged between the output end of the rotating motor 34 and the chuck 32 in a meshed manner.

Specifically, in the actual work, the staff inserts the chuck 32 outside with the one end of steel pipe 2 on the main engine base 1, and simultaneously, switch on external power supply with driving motor 33, it is rotatory to control its output to drive chuck 32, make chuck 32 tensioning in the inboard of steel pipe 2, and then, make chuck 32 prop up steel pipe 2, and simultaneously, switch on external power supply with rotating electrical machines 34, it is rotatory to control its output, and through drive chain (not shown in the figure, specific can refer to the position between rotating electrical machines 34 and the chuck 32 in figure 1) with rotatory kinetic energy transmission to chuck 32 department, control chuck 32 takes place the rotation, and then, drive and its steel pipe 2 synchronous rotation (preferred, rotate along the counter-clockwise direction) of connecting fixedly through chuck 32, thereby provide the guarantee for the cutting work of follow-up three sets of cutting guns 7.

In addition, in this embodiment, the cutting device has two cutting modes, which are plasma cutting and laser cutting, and in practice, after the plasma power supply is switched to the laser path by the operator, the plasma cutting of the device is changed to laser cutting.

Referring to fig. 12, it is shown that a plurality of cutting guns 7 in the present apparatus can obtain power supply power from a plasma power supply at the same time (thick line part in the figure), in this embodiment, it overcomes the disadvantage that each cutting gun 7 in the existing market is equipped with a plasma power supply, in this embodiment, a plurality of cutting guns 7 can obtain kinetic energy from a plasma power supply, so as to save the cost of plasma power supply output and reduce the loss (thin line part in the figure is the gas circuit conveying line of the present apparatus).

In addition, this device still possesses this cutting mode of laser cutting, and specifically, refer to fig. 13, a plurality of laser cutter beam splitting optical fibers all connect to same cutting laser source through corresponding light path, therefore, cutting laser source can distribute the light source to in a plurality of laser cutters to overcome the problem that every laser cutter equipped with a cutting light source on the existing market, practiced thrift the loss of the energy, simultaneously, reduced manufacturing cost.

As a preferable scheme of the above embodiment, the mounting seat 31 is further fixedly mounted with a traveling motor 35, and an output end of the traveling motor 35 is fixedly connected with a traveling gear 351 penetrating through an inner bottom wall of the mounting seat 31, wherein a traveling rack 352 extending toward the sliding plate 12 and engaged with the traveling gear 351 is further provided on the base 11 located at the bottom of the mounting seat 31, and two guide blocks are further symmetrically provided at the bottom of the mounting seat 31, and the mounting seat 31 is further provided with guide rails 36 which are parallel to both sides of the traveling rack 352 and correspond to the two guide blocks one to one.

Specifically, in this embodiment, still install the motor 35 of marcing between mount pad 31 and its corresponding base 11, after this motor 35 of marcing switches on power supply, it can drive through the rotation of output end and march gear 351 and rotate, the cooperation drives it and march in the meshing on the rack 352 of marcing, thereby drive mount pad 31 and the fixed chuck 32 of installation on it carry out the displacement, thereby be convenient for adjust the position of chuck 32, provide convenience for staff's subsequent work, in the in-process that removes, cooperation guide block and guide rail 36 can carry out spacing fixed and the effect of direction to the direction of movement and the angle of mount pad 31, avoid appearing phenomenons such as dislocation, skew.

It should be understood that, in the present embodiment, the purpose of clamping the inner wall of the steel pipe 2 by the chuck 32 is for the thin-walled steel pipe 2, the jaws of the chuck 32 are provided with pads capable of ensuring that the thin-walled steel pipe 2 is not deformed, and when the steel pipe 2 is for the thick-walled steel pipe 2, the motion mode of the chuck 32 is: the outer side wall of the steel pipe 2 is clamped inwards, so that the overall stability of the steel pipe 2 in subsequent rotation is ensured.

Referring to fig. 1-9, a plurality of upright posts 4 are vertically arranged on one side wall of the main machine base 1 at intervals in sequence along the extending direction of the main machine base, the top ends of the upright posts 4 are fixedly connected with a sliding beam 5, a plurality of fixing plates 51 are horizontally arranged on one side wall of the sliding beam 5 close to the main machine base 1 in a sliding manner, each fixing plate 51 is movably connected with a cutting machine head 6 capable of extending above the steel pipe 2, and each cutting machine head 6 is provided with a cutting gun 7 for cutting the steel pipe 2;

the sliding beam 5 includes: two adjacent transverse plates 52, a through groove 53 communicated with each other is arranged on one side wall of each transverse plate 52, and a connecting plate 54 is fixedly connected between the adjacent end parts of the two transverse plates 52 through bolts;

the cutter head 6 includes: the fixed connection is in the slider 61 on the corresponding fixed plate 51, wherein, all invert in every slider 61 has lift cylinder 62, and its output runs through slider 61, and the fixed connection has roof pressure board 63, and the bottom fixed mounting of roof pressure board 63 has the butt in the roof pressure spin group 64 of steel pipe 2 top, and roof pressure spin group 64 includes: the bottom of the clamping block 641 is provided with a trapezoidal embedding groove 642, and rolling balls 83 are rotatably arranged on two side walls of the symmetrically arranged embedding groove 642;

the inner top wall of the slider 61 is further provided with a lifting motor 65, wherein the output end of the lifting motor 65 is fixedly connected with a first bevel gear 651, a rotating shaft 652 is further rotatably arranged between the inner walls of the slider 61 below the first bevel gear 651, a second bevel gear 653 meshed with the first bevel gear 651 is fixedly connected to the rotating shaft 652, at least one lifting gear 654 is further arranged on the outer wall of the rotating shaft 652, and the top of the lifting cylinder 62 is fixedly connected with lifting racks 655 with the same number as the lifting gears 654, wherein the lifting racks 655 and the lifting gears 654 are mutually meshed to drive the lifting cylinder 62 to perform height displacement in the vertical direction;

the cutting torch 7 is disposed on the outer wall of one side of the sliding block 61, and the cutting torch 7 is electrically connected to the plasma power source located in the main chassis 1.

Specifically, referring to fig. 8, which shows a schematic view of the sliding cross beam 5 at each angular position, wherein it can be seen that the sliding cross beam 5 is assembled by splicing two transverse plates 52 with equal size, preferably, the end portions of the two transverse plates 52 far away are sealed and fixed by a sealing plate, and the end portions close to each other are installed and fixed by welding and high-strength bolt fixing, so as to ensure that an integral structure is formed between the two transverse plates 52, and a through groove 53 with the same length is horizontally formed on one side end surface close to the main machine base 1, which aims to facilitate stable sliding of the subsequent cutting machine head 6 and realize adjustment of the position thereof.

Meanwhile, preferably, three (three groups of cutting guns 7 corresponding to the device) fixing plates 51 are slidably arranged on the inner wall of the through groove 53, and a cutting machine head 6 located above the main machine base 1 is fixedly installed on the end face of each fixing plate 51, wherein in the embodiment, the cutting machine head 6 can be driven by a lifting motor 65 and a lead screw 651 arranged in a slider 61 to be matched with each other, so as to adjust the height position of a lifting cylinder 62, and further, a top pressing plate 63 fixedly installed on the output end of the lifting cylinder 62 drives a top pressing rolling ball group 64 to be displaced above the steel pipe 2, and the steel pipe 2 is fixedly compressed by matching with the table top rolling ball group 8, so as to ensure the stability of the steel pipe 2 during subsequent cutting.

Preferably, the pushing and rolling ball group 64 can be understood as an inverted table rolling ball group 8, which has a clamping block 641 abutting against the top of the steel tube 2, and the bottom wall of the clamping block 641 is provided with an embedding groove 642 embedded with the outer wall of the steel tube 2 (capable of accommodating the outer wall of the steel tube 2), and the two symmetrical inner walls of the embedding groove 642 are provided with a group of rolling balls 83 for the purpose of reducing friction when the steel tube 2 rotates.

It should be understood that, on a side wall of each slide block 61, a cutting torch 7 is fixedly mounted, which synchronously follows the slide block 61 to perform lifting operation and is electrically connected with a plasma power supply located in the base 11, and when the cutting torch 7 moves above the steel pipe 2, the plasma power supply supplies current to the cutting torch 7, and then the cutting torch 7 is controlled to cut the steel pipe 2 in a rotating state.

Preferably, in this embodiment, the three sets of cutting guns 7 may operate synchronously according to a preset program, or the last two guns operate and the first two guns operate, specifically, the cutting gun 7 far away from the rolling mechanism 3 is the first gun, and the cutting gun 7 close to the rolling mechanism 3 is the third gun, and when operating according to the preset program, the time interval between every two adjacent guns is 5-6s (where, the length of the cutting time depends on the diameter size of the steel pipe 2, that is, the circumference length, it can be understood that, when cutting the steel pipe 2 with different diameter lengths, the time required for cutting the steel pipe 2 with different diameter lengths is determined according to actual requirements).

Through the rotation of elevating motor 65 output, drive first bevel gear 651 and drive engaged second bevel gear 653 and rotate, simultaneously, second bevel gear 653 drives pivot 652 and rotates, and pivot 652 drives lifting gear 654 to rotate simultaneously to drive lifting rack 655 elevating movement, realize the lift adjustment to cutting torch 7.

Referring to fig. 1-9, the device further includes a PLC control panel 9, wherein the traveling motor 35, the driving motor 33, the rotating motor 34, the lifting cylinder 62 and the lifting motor 65 are electrically connected to the PLC control panel 9.

Specifically, the machine has three control modes. 1. The push-button time delay relay and the AC contactor are controlled. 2. Controlled by a PLC. 3. Controlled by programmed software.

Preferably, all cutting heads 6 on the pipe cutting machine; each is installed a motor drive mechanism that is driven by elevator motor 65, and aim at can make cutting torch 7 under control system, swing the cutting head and cut to be convenient for adjust the angle of cutting torch 7, (in addition, can refer to fig. 14, through the fore-and-aft displacement of mount pad 31 and the rotation of cooperation chuck 32 to steel pipe 2, can cut out different shape and figure on steel pipe 2), can make the steel pipe slot cut out the vertically 90 degrees cutting planes like this, also can cut out required angle cutting plane.

Specifically, in this embodiment, after the steel pipe 2 is placed on the supporting block 81, it has two ways to adjust the elevation of the steel pipe 2:

1) the height of the steel pipe 2 can be adjusted by adjusting the height of the supporting block 81 (not shown in the figure of the embodiment);

2) in addition, the position of the chuck 32 in the height direction (namely, the lifting height of the chuck 32) can be adjusted, so that the chuck 32 drives one end of the fixed steel pipe 2 to be lifted, and the height of the steel pipe 2 can be adjusted by matching with the chuck.

The working principle and the using process of the utility model are as follows: after the utility model is installed:

the staff will treat steel pipe 2 of cutting process and place on main engine base 1, and support fixedly through multiunit mesa gyro wheel group 8 steel pipe 2, then, with the one end joint of steel pipe 2 in the chuck 32 outside, switch on driving motor 33's power, control its output and drive chuck 32 diastole, the realization is to the chucking of 2 inner walls of steel pipe (realize the chucking from the outside to 2 chucks 32 of steel pipe of thick wall), and simultaneously, after the 34 switch on of rotating electrical machines, it is rotatory to drive chuck 32 through drive chain, and then, drive 2 anticlockwise rotations of steel pipe, and simultaneously, after manually removing three cutting aircraft noses 6 of group to preset position, through the working sequence and the operating time of PLC control panel 9 control cutting rifle 7, realize the orderly cutting to steel pipe 2.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a laser plasma multi-gun steel tube cutting machine which characterized in that includes:

the main machine base (1) is horizontally supported and placed with a steel pipe (2) to be cut;

a rolling mechanism (3) is fixedly installed at the end part of one side of the main machine seat (1), and one end of the steel pipe (2) is detachably and fixedly connected to the rolling mechanism (3);

the rolling mechanism (3) is used for driving the steel pipe (2) to rotate circumferentially at the top of the main engine base (1) along the axis of the rolling mechanism (3);

a plurality of upright columns (4) are sequentially and vertically arranged on one side wall of the main machine base (1) at intervals along the extension direction of the main machine base, and the top ends of the upright columns (4) are fixedly connected with sliding cross beams (5);

a plurality of fixing plates (51) are horizontally arranged on one side wall of the sliding cross beam (5) close to the main machine base (1) in a sliding mode, and each fixing plate (51) is movably connected with a cutting machine head (6) capable of extending above the steel pipe (2); and (c) a second step of,

each cutting machine head (6) is provided with a cutting gun (7) used for cutting the steel pipe (2).

2. A laser plasma multi-gun tube cutting machine according to claim 1, characterized in that said main machine base (1) comprises:

the multi-section base (11) is arranged in sequence, and every two adjacent sections of the base (11) are welded and fixed and are in threaded connection with a locking bolt;

the steel pipe support is characterized in that a sliding plate (12) used for supporting the steel pipe (2) is fixedly connected between the tops of the bases (11), and a plurality of table-board rolling ball groups (8) are slidably connected and fixed on the sliding plate (12).

3. A laser plasma multi-gun steel tube cutting machine as claimed in claim 2, characterized in that said table rolling ball set (8) comprises a supporting block (81) slidably disposed on said sliding plate (12), the top of said supporting block is opened with an inwardly recessed trapezoidal groove (82), and two rolling balls (83) are disposed on two symmetrical side walls of said trapezoidal groove (82) respectively and oppositely.

4. A laser plasma multi-gun steel tube cutting machine according to claim 3, characterized in that said rolling mechanism (3) comprises:

a mounting seat (31) fixedly mounted on the top of one of the bases (11);

a chuck (32) is rotatably connected to one side wall of the mounting seat (31) close to the sliding plate (12), a driving motor (33) is arranged on one side wall of the mounting seat (31) symmetrical to the chuck (32), and the output end of the driving motor penetrates through the mounting seat (31) and is fixedly connected to the chuck (32);

a rotating motor (34) is fixedly mounted at the top of the mounting seat (31);

and a transmission chain is meshed between the output end of the rotating motor (34) and the chuck (32).

5. The laser plasma multi-gun steel tube cutting machine as claimed in claim 4, characterized in that a traveling motor (35) is further fixedly mounted in the mounting seat (31), and a traveling gear (351) penetrating through the inner bottom wall of the mounting seat (31) is fixedly connected to the output end of the traveling motor (35);

wherein, a travelling rack (352) which extends to the sliding plate (12) and is meshed with the travelling gear (351) is also arranged on the base (11) positioned at the bottom of the mounting seat (31);

and the bottom of the mounting seat (31) is symmetrically provided with two guide blocks, and the mounting seat (31) is also provided with guide rails (36) which are arranged on two sides of the travelling rack (352) in parallel and correspond to the two guide blocks one to one.

6. A laser plasma multi-gun steel tube cutting machine according to claim 4, characterized in that said cutting head (6) comprises:

a slide block (61) fixedly connected to the corresponding fixed plate (51);

wherein, a lifting cylinder (62) is arranged in each slide block (61) in an inverted manner, the output end of the lifting cylinder penetrates through the slide block (61), and a top pressure plate (63) is fixedly connected with the output end of the lifting cylinder;

the bottom fixed mounting of roof pressure board (63) have the butt in top rolling ball group (64) of steel pipe (2) top, top rolling ball group (64) include:

a clamping block (641) with a trapezoidal embedding groove (642) at the bottom;

the rolling balls (83) are rotatably arranged on two side walls of the embedding groove (642) which are symmetrically arranged.

7. A laser plasma multi-gun steel tube cutting machine as claimed in claim 6, characterized in that the inner top wall of said slide block (61) is further provided with a lifting motor (65);

wherein, the output end of the lifting motor (65) is fixedly connected with a first bevel gear (651), a rotating shaft (652) is also rotatably arranged between the inner walls of the sliding blocks (61) which are positioned below the first bevel gear (651), and a second bevel gear (653) which is meshed with the first bevel gear (651) is fixedly connected on the rotating shaft (652);

at least one lifting gear (654) is arranged on the outer wall of the rotating shaft (652), and lifting racks (655) with the same number as the lifting gears (654) are fixedly connected to the top of the lifting cylinder (62);

wherein the lifting air cylinder (62) is driven to vertically displace in height by the mutual engagement between the lifting rack (655) and the lifting gear (654).

8. A laser plasma multi-gun steel tube cutting machine as claimed in claim 7, characterized in that said cutting gun (7) is disposed on one side outer wall of said slider (61), and said cutting gun (7) is electrically connected to a plasma power supply located in said main machine base (1).

9. A laser plasma multi-gun steel tube cutting machine according to claim 5, characterized in that it further comprises a PLC control panel (9), wherein said traveling motor (35), driving motor (33), rotating motor (34), lifting cylinder (62) and lifting motor (65) are electrically connected to said PLC control panel (9) respectively.

10. A laser plasma multi-gun steel tube cutting machine according to claim 1, characterized in that said sliding beam (5) comprises:

the connecting plate comprises two adjacent transverse plates (52), a through groove (53) communicated with each other is formed in one side wall of each of the two transverse plates (52), and a connecting plate (54) is fixedly connected between the end parts, close to the two transverse plates (52), of the two transverse plates through bolts.

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