CN112548369B - Laser pipe cutting machine - Google Patents

Abstract

The invention discloses a laser pipe cutting machine which comprises a machine body, a laser head, a first motor, a front chuck, a second motor, a workbench, a rear chuck, a third motor, a moving mechanism, a follow-up supporting mechanism, a butt-clamping mechanism and a sliding table mechanism, wherein the machine body is provided with a laser head; the first motor is used for driving the laser head to move along an X axis and a Z axis above the lathe bed; the second motor is used for driving the front chuck to clamp the pipe fitting; the third motor is used for driving the rear chuck to clamp the rear end of the pipe fitting; the moving mechanism is used for driving the workbench and the rear chuck to slide on the lathe bed; the follow-up supporting mechanism is used for supporting the pipe fitting; the butt-clamping mechanism is used for clamping the pipe fitting; the sliding table mechanism is used for driving the follow-up supporting mechanism to ascend or descend in the lathe bed; through setting up above-mentioned setting, thereby can promote the centre gripping of laser pipe cutting machine to the pipe fitting on the whole, the location effect, make the synchronism between each mechanism better simultaneously.

Description

Laser pipe cutting machine

Technical Field

The invention relates to the technical field of laser cutting equipment, in particular to a laser pipe cutting machine.

Background

The laser pipe cutting machine is mainly used for cutting and processing pipes such as round pipes, square pipes and the like, and has the characteristics of high precision, rapid cutting, no limitation to cutting patterns, smooth cut and the like, so that the laser pipe cutting machine gradually replaces the traditional metal cutting equipment.

To the pipe fitting that the pipe diameter is little, it can the whipping at the rotation in-process to produce the shake, set up pipe fitting fixture on the lathe bed usually and be used for preventing the pipe fitting shake, but current pipe fitting fixture is general to the support and the clamping effect of pipe fitting, still can cause the influence to the machining precision of cutting head.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a laser pipe cutting machine, which aims to solve the problems that the existing pipe cutting machine has common supporting and clamping effects on pipes and influences the processing precision.

In order to achieve the purpose, the invention adopts the following technical scheme:

a laser pipe cutter comprising: the laser welding machine comprises a machine body, a laser head, a first motor, a front chuck, a second motor, a workbench, a rear chuck, a third motor, a moving mechanism, a follow-up supporting mechanism, a butt-clamping mechanism and a sliding table mechanism; the laser head and the front chuck are respectively arranged at the front end of the lathe bed, and the first motor is used for driving the laser head to move along an X axis and a Z axis above the lathe bed; the second motor is used for driving the front chuck to clamp the pipe fitting; the workbench is arranged at the rear end of the lathe bed, the rear chuck is arranged above the workbench, and the third motor is used for driving the rear chuck to clamp the rear end of the pipe fitting; the moving mechanism is used for driving the workbench and the rear chuck to slide on the lathe bed; the follow-up supporting mechanism, the butt-clamping mechanism and the sliding table mechanism are all arranged in the lathe bed, and the follow-up supporting mechanism is used for supporting the pipe fitting; the butt-clamping mechanism is used for clamping the pipe fitting; the sliding table mechanism is in transmission connection with the follow-up supporting mechanism through a synchronizing rod and is used for driving the follow-up supporting mechanism to ascend or descend in the lathe bed.

In the laser pipe cutting machine, the sliding table mechanism comprises a working surface, sliding table guide rails which are arranged on two sides of the working surface and extend along the length direction of the machine body, a sliding table sliding block which is arranged on the sliding table guide rails in a sliding manner, and a sliding table transmission mechanism which is arranged between the two sliding table guide rails and comprises a lead screw, a lead screw nut, a nut seat, a bearing and a fourth motor; the output ends of the lead screw and the fourth motor extend along the length direction of the lathe bed; the screw rod nut and the nut seat are respectively arranged on the screw rod, one end, close to the rear chuck, of the screw rod is in transmission connection with the output end of the fourth motor, the other end of the screw rod is connected with the working face through a bearing, a first synchronizing rod connecting block is arranged on one side wall of the nut seat, a second synchronizing rod connecting block is arranged on the follow-up supporting mechanism, and two ends of the synchronizing rod are respectively connected with the first synchronizing rod connecting block and the second synchronizing rod connecting block.

In the laser pipe cutting machine, the follow-up support mechanism comprises a first lifting cylinder with an upward output end, a first lifting plate arranged in parallel with the first lifting cylinder, an ejector block arranged on the first lifting plate and connected with the output end of the first lifting cylinder, a first connecting plate slidably connected with the other side wall of the first lifting plate, a second connecting plate slidably connected with the other side wall of the first connecting plate, a moving plate arranged on the outer side of the first connecting plate, an inclined guide rail arranged on the moving plate and a horizontal guide rail arranged on the other side wall of the inclined guide rail, one side wall of the second synchronizing rod connecting block is connected with the moving plate, and the bottom surface of the second synchronizing rod connecting block is slidably arranged on the horizontal guide rail; the inclined guide rail is arranged obliquely downwards from the front side to the rear side of the moving plate, and the first connecting plate is arranged on the inclined guide rail in a sliding mode through an inclined connecting block.

In the laser pipe cutting machine, the top of the first lifting plate is rotatably provided with a roller.

In the laser pipe cutting machine, the butt-clamping mechanism comprises an installation plate, a second lifting cylinder, a butt-clamping motor, a rotating gear, a forward rack, a reverse rack, a forward clamping plate, a reverse clamping plate, a forward clamping column and a reverse clamping column; the output end of the second lifting cylinder is arranged upwards, and the output end of the second lifting cylinder penetrates through the mounting plate and is fixedly connected with the bottom surface of a second lifting plate arranged above the mounting plate; the butt-clamping motor is arranged on the bottom surface of the second lifting plate, and the output end of the butt-clamping motor penetrates through the second lifting plate and is in transmission connection with a rotating gear arranged on the upper surface of the second lifting plate; the forward rack and the reverse rack are arranged in parallel, and teeth of the forward rack and the reverse rack are arranged oppositely and are meshed with the rotating gear; the pipe fitting clamping device is characterized in that a forward clamping plate is arranged on the forward rack in a sliding mode, a forward clamping column is arranged on the forward clamping plate, a reverse clamping plate is arranged on the reverse rack in a sliding mode, a reverse clamping column is arranged on the reverse clamping plate, and the forward clamping column and the reverse clamping column are used for clamping pipe fittings.

In the laser pipe cutting machine, the upper surface of the second lifting plate is also provided with a forward guide rail and a reverse guide rail, the forward guide rail is arranged on the outer side of the forward rack, and the reverse guide rail is arranged on the outer side of the reverse rack; the forward guide rail, the reverse guide rail, the forward rack and the reverse rack are parallel to each other; a forward sliding block is arranged on the forward guide rail in a sliding manner, and the top of the forward sliding block is fixedly connected with the forward clamping plate; the reverse guide rail is provided with a reverse sliding block in a sliding manner, and the reverse sliding block is fixedly connected with the reverse clamping plate.

In the laser pipe cutting machine, a forward rotating shaft is arranged in the forward clamping column, and the forward clamping column is rotatably arranged outside the forward rotating shaft; the reverse clamping column is internally provided with a reverse rotating shaft, and the reverse clamping column is rotatably arranged outside the reverse rotating shaft.

In the laser pipe cutting machine, the moving mechanism comprises a moving track, a moving slide block, a moving motor, a moving gear and a moving rack; the movable rails are arranged on two sides of the lathe bed and extend along the length direction of the lathe bed respectively, a movable sliding block matched with the movable rails is arranged on the movable rails in a sliding mode, and the top of each movable sliding block is connected with the bottom surface of the workbench; the output end of the moving motor is arranged downwards, penetrates through the workbench and is in transmission connection with a moving gear arranged below the workbench, the moving rack is arranged on the inner side of the moving track, and the moving rack is meshed with the moving gear.

In the laser pipe cutting machine, the laser pipe cutting machine further comprises a lubricating oil system; the lubricating oil system comprises an electric oil supply pump, a lubricating oil separator, a movable rack lubricating oil cotton wheel, a rear chuck lubricating oil cotton wheel, an oil return groove and an oil leakage hole; the electric oil supply pump is connected with an oil inlet of the lubricating oil separator through a pipeline, and an oil outlet of the lubricating oil separator is respectively connected with the movable rack lubricating oil cotton wheel and the rear chuck lubricating oil cotton wheel through pipelines; the lubricating oil cotton wheel of the movable rack is arranged below the workbench and meshed with the movable rack; the lubricating oil cotton wheel of the rear chuck is meshed with the gear on the rear chuck, and the gear on the rear chuck is meshed with the gear on the output end of the third motor; the oil return groove is arranged below the movable rack and the movable track, an oil leakage hole is formed in the front end of the oil return groove, and the oil return groove is used for recovering lubricating oil on the movable rack and the movable track.

In the laser pipe cutting machine, the lubricating oil separator is also provided with a pressure one-way valve; and a gear cover is arranged outside the rear chuck lubricating oil cotton wheel.

Has the advantages that:

the invention provides a laser pipe cutting machine, which is characterized in that a front chuck for clamping the front part of a pipe fitting, a rear chuck for clamping the rear end of the pipe fitting, a follow-up supporting mechanism for supporting the pipe fitting from the vertical direction, a butt-clamping mechanism for clamping the pipe fitting from the horizontal direction and a sliding table mechanism for driving the follow-up supporting mechanism to ascend or descend are arranged, so that the clamping and positioning effects of the laser pipe cutting machine on the pipe fitting are integrally improved, and the synchronism among all mechanisms is better.

Drawings

Fig. 1 is a first schematic structural diagram of the laser pipe cutting machine provided by the invention.

Fig. 2 is a schematic structural diagram of the laser pipe cutting machine.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a partial structural schematic diagram of the laser pipe cutting machine.

Fig. 5 is a top view of the laser pipe cutter.

Fig. 6 is a schematic structural view of the slide table mechanism.

Fig. 7 is a plan view of the slide table mechanism.

Fig. 8 is a schematic structural view of the follow-up support mechanism and the slide table mechanism.

Fig. 9 is an enlarged view of a portion B in fig. 8.

Fig. 10 is a schematic structural view of the follow-up support mechanism.

Fig. 11 is a first structural schematic diagram of the opposite clamping mechanism.

Fig. 12 is a structural schematic diagram two of the butt-clamping mechanism.

In the drawings: 1-lathe bed, 2-laser head, 3-first motor, 4-front chuck, 5-second motor, 6-workbench, 7-rear chuck, 8-third motor, 9-moving mechanism, 10-follow-up supporting mechanism, 11-butt clamp mechanism, 12-sliding table mechanism, 13-synchronous rod, 14-working face, 15-sliding table guide rail, 16-sliding table sliding block, 17-lead screw, 18-lead screw nut, 19-nut seat, 20-bearing, 21-fourth motor, 22-first synchronous rod connecting block, 23-second synchronous rod connecting block, 24-anti-collision glue, 25-first lifting cylinder, 26-first lifting plate, 27-top block, 28-first connecting plate, 29-second connecting plate, 30-moving plate, 31-inclined guide rail, 32-horizontal guide rail, 33-inclined connecting block, 34-roller, 35-first limiting block, 36-second limiting block, 37-first lifting rail, 38-first lifting slider, 39-third limiting block, 40-second lifting rail, 41-second lifting slider, 42-fourth limiting block, 43-first lifting cylinder mounting seat, 44-mounting plate, 45-second lifting plate, 46-second lifting cylinder, 47-opposite clamping motor, 48-rotating gear, 49-forward rack, 50-reverse rack, 51-forward clamping plate, 52-reverse clamping plate, 53-forward clamping column, 54-reverse clamping column, 55-forward guide rail, 56-reverse guide rail, 57-forward slide block, 58-reverse slide block, 59-forward stop block, 60-reverse stop block, 61-first forward connecting plate, 62-second forward connecting plate, 63-first reverse connecting plate, 64-second reverse connecting plate, 65-forward rotating shaft, 66-reverse rotating shaft, 67-trigger plate, 68-travel switch mounting seat, 69-travel switch, 70-guide shaft, 71-linear bearing, 72-second avoidance hole, 73-moving track, 74-moving slide block, 75-moving motor, 76-moving gear, 77-moving rack, 78-rear chuck mounting seat, 79-kidney-shaped hole, 80-front chuck mounting seat, 81-positioning block, 82-first electric oil supply pump, 83-a first lubricating oil separator, 84-a movable rack lubricating oil cotton wheel, 85-a rear chuck lubricating oil cotton wheel, 86-an oil return groove, 87-an oil leakage hole, 88-a pressure one-way valve, 89-a gear cover, 90-an oil collection groove, 91-a second electric oil supply pump and 92-a second lubricating oil separator.

Detailed Description

The invention provides a laser pipe cutting machine, which is further described in detail below by referring to the attached drawings and embodiments in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

Referring to fig. 1-12, the present invention provides a laser pipe cutting machine, comprising: the device comprises a lathe bed 1, a laser head 2, a first motor 3, a front chuck 4, a second motor 5, a workbench 6, a rear chuck 7, a third motor 8, a moving mechanism 9, a follow-up supporting mechanism 10, a butt-clamping mechanism 11 and a sliding table mechanism 12; the laser head 2 and the front chuck 4 are respectively arranged at the front end of the lathe bed 1, and the first motor 3 is used for driving the laser head 2 to move along an X axis and a Z axis above the lathe bed 1; the second motor 5 is used for driving the front chuck 4 to clamp the pipe fitting; the workbench 6 is arranged at the rear end of the lathe bed 1, the rear chuck 7 is arranged above the workbench 6, and the third motor 8 is used for driving the rear chuck 7 to clamp the rear end of the pipe fitting; the moving mechanism 9 is used for driving the workbench 6 and the rear chuck 7 to slide on the lathe bed 1; the follow-up supporting mechanism 10, the butt-clamping mechanism 11 and the sliding table mechanism 12 are all arranged in the lathe bed 1, and the follow-up supporting mechanism 10 is used for supporting a pipe fitting; the butt-clamping mechanism 11 is used for clamping a pipe fitting; the sliding table mechanism 12 is in transmission connection with the follow-up supporting mechanism 10 through a synchronizing rod 13 and is used for driving the follow-up supporting mechanism 10 to ascend or descend in the lathe bed 1.

In practical application, the rear chuck 7 is used for fixing the rear end of the pipe, the front chuck 4 is used for clamping the front part of the pipe, the front part of the pipe protrudes by a certain length, and the laser head 2 is used for machining and cutting the pipe below the pipe. In the present embodiment, the numbers from the rear chuck 7 to the front chuck 4 are: to pressing from both sides mechanism 11, follow-up supporting mechanism 10, slip table mechanism 12, follow-up supporting mechanism 10, to pressing from both sides mechanism 11 and setting up to two sets of promptly, follow-up supporting mechanism 10 sets up to three sets, and the above-mentioned setting is according to the length of pipe fitting and corresponds the setting, to the setting quantity of the longer pipe fitting multiplicable follow-up supporting mechanism 10 of length, pair clamp mechanism 11. In the initial stage of cutting, the two groups of butt clamp mechanisms 11 and the three groups of follow-up support mechanisms 10 are both in contact with the pipe fitting; when the rear chuck 7 continues to move toward the front chuck 4 while the cutting is continued, the follow-up support mechanism 10 or the facing clamp mechanism 11 located in front of the rear chuck 7 is lowered to the inside of the bed 1, respectively, in order to avoid the rear chuck 7. Slip table mechanism 12 makes the linkage nature of a plurality of follow-up supporting mechanism 10 strengthen through synchronizing bar 13 to promote the synchronism between a plurality of follow-up supporting mechanism 10, follow-up supporting mechanism 10 bears the pipe fitting, stabilizes the pipe fitting in vertical direction, to pressing from both sides mechanism 11 and carry out the centre gripping to the left and right sides of pipe fitting, stabilize the pipe fitting on the horizontal direction, through preceding chuck 4, back chuck 7, follow-up supporting mechanism 10, to the setting of pressing from both sides mechanism 11 and slip table mechanism 12, wholly promote laser pipe cutting machine to the centre gripping of pipe fitting, location effect, make the synchronism between each mechanism better simultaneously.

Referring to fig. 6-7, further, the sliding table mechanism 12 includes a working surface 14, sliding table guide rails 15 disposed on both sides of the working surface 14 and extending along the length direction of the bed 1, a sliding table slider 16 slidably disposed on the sliding table guide rails 15, and a sliding table transmission mechanism disposed between the two sliding table guide rails 15, where the sliding table transmission mechanism includes a lead screw 17, a lead screw nut 18, a nut seat 19, a bearing 20, and a fourth motor 21; the output ends of the lead screw 17 and the fourth motor 21 extend along the length direction of the lathe bed 1; the screw nut 18 and the nut seat 19 are respectively arranged on the screw 17, one end of the screw 17 close to the rear chuck 7 is in transmission connection with an output end of a fourth motor 21, the other end of the screw is connected with the working surface 14 through a bearing 20, a first synchronizing rod connecting block 22 is arranged on one side wall of the nut seat 19, a second synchronizing rod connecting block 23 is arranged on the follow-up supporting mechanism 10, and two ends of the synchronizing rod 13 are respectively connected with the first synchronizing rod connecting block 22 and the second synchronizing rod connecting block 23.

In practical application, when the fourth motor 21 operates, the screw 17 is driven to rotate, the screw nut 18 and the nut seat 19 are driven to move forward or backward on the screw 17 along the extending direction of the screw 17, so as to drive the synchronous rod 13 to move forward or backward correspondingly, and therefore the follow-up support mechanism 10 connected with the other end of the synchronous rod 13 is enabled to ascend or descend in the lathe bed 1 to adapt to the rotation and cutting of the reducer union. Specifically, the fourth motor 21 is a servo motor, and when the fourth motor 21 operates in the reverse direction, the moving directions of the sliding table transmission mechanism, the first synchronizing rod connecting block 22, the synchronizing rod 13 and the fourth motor 21 during the forward operation are opposite, so as to drive the servo support mechanism 10 to ascend or descend (if the fourth motor 21 operates in the forward direction, the servo support mechanism 10 ascends, the fourth motor 21 operates in the reverse direction, and the servo support mechanism 10 descends, otherwise, when the fourth motor 21 operates in the forward direction, the servo support mechanism 10 descends, and the servo support mechanism 10 ascends, the fourth motor 21 operates in the reverse direction). Through set up first synchronizing bar connecting block 22 and synchronizing bar 13 on slip table drive mechanism, make the transmission become simple, shared space diminishes, and the accessible is adjusted the power of fourth motor 21 in order to adapt to the pipe fitting of different length moreover, and the longer pipe fitting power of using of promptly fourth motor 21 that power is bigger more to make the operation of pipe cutting machine smooth and easy. And the transmission mode has high transmission efficiency and high running stability, greatly reduces the occupied space compared with the prior chain transmission, and does not generate the phenomenon of chain breakage. Specifically, in order to increase the load capacity of the slide table transmission assembly, a lead screw 17 with a larger diameter and a fourth motor 21 with a larger power may be provided.

Further, the two ends of the working surface 14 are respectively provided with an anti-collision glue 24 and are respectively arranged on the two sides of the screw 17, and the anti-collision glue is used for protecting the sliding table mechanism 12 through the arrangement.

Further, a first lubricating oil separator 83 is further arranged on the first synchronizing rod connecting block 22, an oil inlet of the first lubricating oil separator 83 is connected with the first electric oil supply pump 82, and an oil outlet of the first lubricating oil separator 83 is connected with the oil path connecting piece through a pipeline and is respectively used for automatically adding lubricating oil to the sliding table guide rails 15 and the lead screw 17 on the two sides.

Referring to fig. 8-10, further, the follow-up supporting mechanism 10 includes a first lifting cylinder 25 with an upward output end, a first lifting plate 26 disposed parallel to the first lifting cylinder 25, a top block 27 disposed on the first lifting plate 26 and connected to the output end of the first lifting cylinder 25, a first connecting plate 28 slidably connected to another side wall of the first lifting plate 26, a second connecting plate 29 slidably connected to another side wall of the first connecting plate 28, a moving plate 30 disposed outside the first connecting plate 28, an inclined guide rail 31 disposed on the moving plate 30, and a horizontal guide rail 32 disposed on another side wall of the inclined guide rail 31, one side wall of the second synchronizing bar connecting block 23 is connected with the moving plate 30, and the bottom surface of the second synchronizing bar connecting block 23 is slidably arranged on the horizontal guide rail 32; the inclined guide rail 31 is inclined downward from the front side of the moving plate 30 toward the rear side, and the first link plate 28 is slidably disposed on the inclined guide rail 31 by an inclined link block 33.

In practical applications, in order to reduce the operation load of the first lifting cylinder 25 and ensure the supporting effect of the first lifting cylinder 25 on the pipe, the first lifting cylinder 25 is set to two states, namely: the output end is fully extended and fully retracted. When fully extended, the top of the first lifting plate 26 supports the pipe under the action of the top block 27; when the pipe cutting machine is completely contracted, under the action of the top block 27, the first lifting plate 26 is contracted into the machine body 1 of the pipe cutting machine to provide an avoiding space for the movement of the rear chuck 7; when the square pipe is cut, according to the above working principle, the fourth motor 21 is rotated forward or backward, and the synchronizing rod 13 is driven by the second synchronizing rod connecting block 23 to move forward or backward, so that the first connecting plate 28 and the first lifting plate 26 move upward or downward along the inclined guide track 31 relative to the moving plate 30, and the top of the first lifting plate 26 is kept in contact with the pipe all the time, thereby ensuring the supporting effect of the pipe (circular pipe and square pipe).

In one embodiment, when the synchronizing rod 13 gradually moves backward, the second synchronizing rod connecting block 23 is also moved backward relatively by the synchronizing rod 13, and the inclined connecting block 33 gradually slides from a lower position (i.e., a lower portion) of the inclined guide rail 31 to a higher position (i.e., an upper portion) along the inclined guide rail 31, so that the inclined connecting block 33 is fixedly connected with the first connecting plate 28, and thus the first connecting plate 28 is driven to ascend from the lower position; conversely, when the synchronizing bar 13 advances, the first link plate 28 descends from the high position. With the above arrangement, not only the transmission efficiency is high, but also the plurality of follow-up support mechanisms 10 are good in synchronism. Specifically, the second connecting block 23 of the synchronizing bar can be connected with the ends of two synchronizing bars 13, so as to drive other follow-up supporting mechanisms 10.

Further, a roller 34 is rotatably disposed on the top of the first lifting plate 26. That is, when the pipe fitting moves forward or backward, the rollers 34 all rotate, and through the arrangement, the friction force between the first lifting plate 26 and the outer wall of the pipe fitting is reduced, and the outer wall of the pipe fitting is prevented from being scratched.

Further, the side walls of the two ends of the horizontal guide rail 32 are respectively provided with a first limiting block 35; the side walls of the two ends of the inclined guide track 31 are respectively provided with a second limiting block 36; the first limiting block 35 and the second limiting block 36 are respectively used for limiting the movable strokes of the first synchronizing rod connecting block 22 and the inclined connecting block 33, and when the position sensor fails, the second synchronizing rod connecting block 23 and the inclined connecting block 33 are protected.

Further, vertically be provided with two first lifting rails 37 on the lateral wall of second connecting plate 29, first lifting rails 37 go up the slip and are provided with the first lifting slide block 38 of a plurality of, each the top of first lifting slide block 38 all with the lateral wall rigid coupling of first connecting plate 28. In practical use, the second connecting plate 29 is fixed to the bed 1, so that the first connecting plate 28 is raised or lowered relative to the second connecting plate 29 by providing the first lifting rail 37 and the first lifting slider 38. Through setting up two first lifting track 37 and the first lifting slide 38 of a plurality of, all be favorable to improving the stationarity that rises or descend, and then guarantee the supporting effect of first lifter plate 26 to the pipe fitting.

Further, the side walls of the two ends of the first lifting track 37 are respectively provided with a third limiting block 39. Similarly, the third limiting block 39 also plays a role of protecting the first lifting slider 38.

Further, the other side wall of the first connecting plate 28 provided with the first lifting slider 38 is vertically provided with two second lifting rails 40, the second lifting rails 40 are slidably provided with a second lifting slider 41, and the top of the second lifting slider 41 is fixedly connected with the side wall of the lifting plate. In practical application, the top block 27 is connected with the output end of the first lifting cylinder 25, and the side wall of the top block 27 is connected with the first lifting plate 26, so that when the output end gradually extends out, the first lifting plate 26 rises along the second lifting track 40 under the guiding action of the second lifting slider 41 until the output end completely extends out; conversely, as the output end is gradually retracted, the first lifter plate 26 is gradually lowered. The smoothness of the ascending or descending of the first elevation plate 26 is improved by providing the second elevation rail 40 and the second elevation slider 41.

Further, the side walls of the two ends of the second lifting track 40 are both provided with a fourth limiting block 42. Similarly, the fourth stopper 42 also protects the second lifting slider 41.

Further, the first lifting plate 26 is of an inverted U-shaped structure, the first connecting plate 28 is provided with a first lifting cylinder mounting seat 43, and the first lifting cylinder 25 is respectively arranged on the upper surface of the first lifting cylinder mounting seat 43 and in a cavity of the inverted U-shaped structure. The above arrangement is advantageous for shortening the distance between the first lifting plate 26 and the first lifting cylinder 25, reducing the volume of the follow-up support mechanism 10, and also for improving the connection stability of the output end and the top block 27.

Referring to fig. 11-12, further, the opposite clamping mechanism 11 includes a mounting plate 44, a second lifting plate 45, a second lifting cylinder 46, an opposite clamping motor 47, a rotating gear 48, a forward rack 49, a reverse rack 50, a forward clamping plate 51, a reverse clamping plate 52, a forward clamping column 53, and a reverse clamping column 54; the output end of the second lifting cylinder 46 is arranged upwards, and the output end of the second lifting cylinder penetrates through the mounting plate 44 and is fixedly connected with the bottom surface of a second lifting plate 45 arranged above the mounting plate 44; the butt-clamping motor 47 is arranged on the bottom surface of the second lifting plate 45, and the output end of the butt-clamping motor passes through the second lifting plate 45 and is in transmission connection with a rotating gear 48 arranged on the upper surface of the second lifting plate 45; the forward rack 49 and the reverse rack 50 are arranged in parallel, and teeth of the forward rack 49 and the reverse rack are arranged oppositely and are meshed with the rotating gear 48; forward rack 49 is gone up the slip and is provided with forward grip block 51, be provided with forward centre gripping post 53 on the forward grip block 51, the slip is provided with reverse grip block 52 on the reverse rack 50, be provided with reverse centre gripping post 54 on the reverse grip block 52, forward centre gripping post 53 and reverse centre gripping post 54 are used for the centre gripping pipe fitting.

In practical application, the clamping motor 47 is a servo motor; the second lifting cylinder 46 and the butt-clamping motor 47 are both electrically connected with the control mechanism, and pipes with different pipe diameters are clamped through programming. The second lifting cylinder 46 controls the lifting or lowering distance of the second lifting plate 45, so that the axis of the square pipe or the rectangular pipe is not changed when the square pipe or the rectangular pipe rotates; when the opposite clamping motor 47 rotates forwards or backwards, the rotating gear 48 is driven to rotate clockwise or anticlockwise, so that the forward clamping column 53 on the forward clamping plate 51 in sliding connection with the forward rack 49 and the reverse clamping column 54 on the reverse clamping plate 52 in sliding connection with the reverse rack 50 are close to or far away from each other, and the pipe fitting clamping device is suitable for pipe fittings with different widths. Through the arrangement, the oppositely clamping mechanism 11 is beneficial to limiting shaking generated when the pipe rotates, the clamping effect on the pipe fitting is good, the cutting of the auxiliary pipe is facilitated, and the machining precision of the pipe cutting machine is improved. Specifically, the butt-clamping mechanism 11 can butt-clamp round pipes with the diameter of 10-220 mm and square pipes with the diameter of 10 multiplied by 10-150 multiplied by 150 mm. The applicability and the practicability are strong.

Further, a forward guide rail 55 and a reverse guide rail 56 are further arranged on the upper surface of the second lifting plate 45, the forward guide rail 55 is arranged on the outer side of the forward rack 49, and the reverse guide rail 56 is arranged on the outer side of the reverse rack 50; the forward guide rail 55, the reverse guide rail 56, the forward rack 49 and the reverse rack 50 are parallel to each other; a forward sliding block 57 is slidably arranged on the forward guide rail 55, and the top of the forward sliding block 57 is fixedly connected with the forward clamping plate 51; the reverse guide rail 56 is slidably provided with a reverse sliding block 58, and the reverse sliding block 58 is fixedly connected with the reverse clamping plate 52. Through setting up forward guide rail 55, forward slider 57 and reverse guide rail 56, reverse slider 58, make forward grip block 51 and reverse grip block 52 smooth movement on forward guide rail 55 and reverse guide rail 56 respectively, avoid producing vibrations to guarantee the centre gripping effect of forward centre gripping post 53 and reverse centre gripping post 54 to the pipe fitting.

Further, the side walls of the two ends of the forward guide rail 55 are respectively provided with a forward limiting block 59. The forward limiting block 59 is used for preventing collision and protecting the forward sliding block 57.

Further, the two side walls of the reverse guide rail 56 are respectively provided with a reverse limiting block 60. Similarly, the reverse stopper 60 is used for collision avoidance and protects the reverse slider 58.

Further, the forward clamping plate 51 comprises a first forward connecting plate 61 parallel to the forward rack 49 and a second forward connecting plate 62 perpendicular to the first forward connecting plate 61; one end of the first forward connecting plate 61, which is far away from the reverse clamping plate 52, is connected with the end of the second forward connecting plate 62, and two ends of the second forward connecting plate 62 are respectively connected with the forward clamping columns 53; the reverse clamp plate 52 includes a first reverse link plate 63 parallel to the reverse rack 50 and a second reverse link plate 64 perpendicular to the first reverse link plate 63; one end of the first reverse connecting plate 63, which is far away from the forward clamping plate 51, is connected with the end of the second reverse connecting plate 64, and two ends of the second reverse connecting plate 64 are respectively connected with the reverse clamping columns 54; the forward 53 and reverse 54 gripping posts are symmetrically disposed about the axis of the tubular. First forward connecting plate 61 and second forward connecting plate 62, first reverse connecting plate 63 and the reverse connecting plate 64 of second all are the L type, through two centre gripping posts that both sides set up respectively to carry out the centre gripping to the pipe fitting, further improve the stability of pipe fitting, avoid the pipe fitting shake.

Further, a forward rotating shaft 65 is arranged in the forward clamping column 53, and the forward clamping column 53 is rotatably arranged outside the forward rotating shaft 65; the reverse clamping column 54 is internally provided with a reverse rotating shaft 66, and the reverse clamping column 54 is rotatably arranged outside the reverse rotating shaft 66. That is, when the pipe moves forward or backward along the transfer direction, the forward clamping column 53 and the backward clamping column 54 both rotate, which is beneficial to protecting the outer wall of the pipe and avoiding the scratch caused by excessive friction.

Further, a trigger plate 67 is arranged on the side wall of the first forward connecting plate 61 or the first reverse connecting plate 63; two travel switch mounting seats 68 are arranged on the side wall of the mounting plate 44 in the length direction, and travel switches 69 are respectively arranged on the inner walls of the two travel switch mounting seats 68; the trigger plate 67 is in contact with or separated from the two travel switches 69; the distance between the two travel switches 69 is the maximum or minimum travel distance of the first forward connecting plate 61 and/or the first reverse connecting plate 63. The two travel switches 69 function to protect the clamp motor 47. Specifically, the travel switch 69 is electrically connected to the control mechanism, and when the trigger plate 67 on the first forward connecting plate 61 or the first reverse connecting plate 63 contacts one of the travel switches 69, the signal is transmitted to the control mechanism, and the control mechanism controls the clamp motor 47 to stop running, that is, the clamp motor 47 is prevented from running continuously, so that the forward slider 57 or the reverse slider 58 slides out of the forward guide rail 55 or the reverse guide rail 56. The travel switch 69 is matched with the forward limiting block 59 and the reverse limiting block 60 and used for protecting the operation of the butt-clamping mechanism 11.

Further, the equal rigid coupling in four corners department of second lifter plate 45 lower surface has guiding axle 70, the four corners department of mounting panel 44 all is equipped with first dodge the hole (not visible in the picture), each guiding axle 70 all with one first dodge the hole and correspond, guiding axle 70 passes first dodge the hole. The guide shaft 70 plays a role in supporting the second lifting plate 45, so that the second lifting plate 45 is uniformly stressed, the running load of the second lifting cylinder 46 is reduced, and a limiting effect is also played. When the output end of the second lifting cylinder 46 contracts, the output end drives the second lifting plate 45 to descend, and the guide shaft 70 penetrates through the first avoidance hole; on the contrary, when the output end of the second lifting cylinder 46 extends out, the output end drives the second lifting plate 45 to ascend.

Further, a linear bearing 71 is further arranged in the first avoidance hole, and the guide shaft 70 is arranged in the linear bearing 71. When the linear bearing 71 and the guide shaft 70 are used in a combined manner, the bearing ball is in point contact with the bearing point, so that the use load is reduced; the steel ball rotates with extremely small friction resistance, which is beneficial to obtaining high-precision stable motion. With the above arrangement, the accuracy of the guide shaft 70 can be improved, and the frictional resistance is small, so that the second lifting plate 45 can be lifted up or lowered down smoothly.

Further, be equipped with on the mounting panel 44 and run through the second of mounting panel 44 dodges the hole 72, to pressing from both sides motor 47 and wear to establish in the second dodges the hole 72. Through setting up the second and dodging hole 72, make to press from both sides motor 47 can pass in the second dodges hole 72 to make the distance of second lifter plate 45 and mounting panel 44 shorten, be favorable to dwindling the whole volume of pressing from both sides mechanism 11.

Referring to fig. 3-4, further, the moving mechanism 9 includes a moving track 73, a moving slider 74, a moving motor 75, a moving gear 76 and a moving rack 77; the moving rails 73 are arranged on two sides of the bed body 1 and extend along the length direction of the bed body 1 respectively, moving sliders 74 matched with the moving rails 73 are arranged on the moving rails 73 in a sliding mode, and the tops of the moving sliders 74 are connected with the bottom surface of the workbench 6; the output end of the moving motor 75 is arranged downwards, penetrates through the workbench 6 and is in transmission connection with a moving gear 76 arranged below the workbench 6, the moving rack 77 is arranged on the inner side of the moving track 73, and the moving rack 77 is meshed with the moving gear 76. In practical application, the moving motor 75 is a servo motor, and when the moving motor 75 operates, the moving gear 76 is driven to rotate, so that the workbench 6 moves along the extending direction of the moving rack 77 under the guiding action of the moving track 73 and the moving slider 74, and the pipe on the rear chuck 7 is driven to move forward or backward along the extending direction of the bed 1; the transmission mode is simple, the transmission efficiency is high, and the occupied space is small.

Referring to fig. 2-3 and 5, further, the rear chuck 7 is disposed on the worktable 6 through a rear chuck mounting seat 78, and waist-shaped holes 79 extending along the width direction of the lathe bed 1 are disposed on both sides of the rear chuck mounting seat 78; waist-shaped holes 79 extending along the width direction of the lathe bed 1 are respectively arranged on two sides of the second lifting plate 45; waist-shaped holes 79 extending along the width direction of the lathe bed 1 are respectively arranged on two sides of the second connecting plate 29; the front chuck 4 is arranged on the lathe bed 1 through a front chuck mounting seat 80, and waist-shaped holes 79 extending along the width direction of the lathe bed 1 are formed in two sides of the front chuck mounting seat 80; positioning blocks 81 are respectively arranged on two sides of the rear chuck mounting seat 78, two sides of the second connecting plate 29 and two sides of the front chuck mounting seat 80, threaded holes horizontally penetrating through the positioning blocks 81 are formed in the positioning blocks 81, and in practical application, left and right adjustment of the rear chuck 7, the butt-clamping mechanism 11, the follow-up supporting mechanism 10 and the front chuck 4 on the lathe bed 1 is realized through matching of the waist-shaped holes 79, mounting holes in the lathe bed 1 and bolts, so that fixing in the vertical direction is realized, and the axes of pipe fittings are enabled to coincide; through the cooperation that sets up locating piece 81 and screw hole and bolt, realize that back chuck 7, follow-up supporting mechanism 10 and preceding chuck 4 are ascending fixedly in the horizontal direction.

Referring to fig. 2-5, further, the laser pipe cutting machine further includes a lubricating oil system; the lubricating oil system comprises a second electric oil supply pump 91, a second lubricating oil separator 92, a movable rack lubricating oil cotton wheel 84, a rear chuck lubricating oil cotton wheel 85, an oil return groove 86 and an oil leakage hole 87; the second electric oil supply pump 91 is connected with an oil inlet of a second lubricating oil separator 92 through a pipeline, and an oil outlet of the second lubricating oil separator 92 is respectively connected with the movable rack lubricating oil cotton wheel 84 and the rear chuck lubricating oil cotton wheel 85 through pipelines; the moving rack lubricating oil cotton wheel 84 is arranged below the workbench 6 and meshed with the moving rack 77; the rear chuck lubricating oil cotton wheel 85 is meshed with a gear on the rear chuck 7, and the gear on the rear chuck 7 is meshed with a gear on the output end of the third motor 8; the oil return groove 86 is disposed below the moving rack 77 and the moving rail 73, an oil leakage hole 87 is disposed at the front end of the oil return groove 86, and the oil return groove 86 is used for recovering lubricating oil on the moving rack 77 and the moving rail 73. The second electric oil supply pump 91 is used for automatically supplying lubricating oil to the movable rack lubricating oil cotton wheel 84 and the rear chuck lubricating oil cotton wheel 85; thus, when the moving motor 75 is operated, that is, the moving gear 76 is rotated along the moving rack 77, the moving rack lube cotton wheel 84 engaged with the moving rack 77 is also rotated accordingly, thereby lubricating the moving rack 77; similarly, when the third motor 8 operates, that is, the gear on the third motor 8 drives the gear on the rear chuck 7 to rotate, so that the rear chuck lubricating oil cotton wheel 85 engaged with the gear on the rear chuck 7 also correspondingly rotates, thereby lubricating the gear on the rear chuck 7; the second lubricating oil distributor 92 is also connected to the movable slider 74 for lubricating the movable slider 74. Waste oil on the movable rack 77 and the movable track 73 is collected through the oil return groove 86 and then is uniformly recovered in the oil leakage hole 87, the oil leakage hole 87 and a part which is connected to the outside of the laser pipe cutting machine through a pipeline and is recovered by a barrel or a rubber box and then is uniformly treated, lubricating oil can be automatically added to the part which needs to be added with lubricating oil regularly on the laser pipe cutting machine by arranging a lubricating oil system, the stop times are reduced, the working efficiency is improved, and the labor intensity is reduced; and through setting up oil return groove 86 and oil leak hole 87, avoid lubricating oil to drip everywhere, pollute laser pipe cutting machine and workshop environment.

Referring to fig. 3-5, a pressure check valve 88 is further disposed on the second lubricating oil separator 92; the function of the pressure check valve 88 is that the second lubricant oil separator 92 discharges oil when a certain pressure is reached, and the oil discharge amount of the oil outlets is equal by the arrangement. The outside of back chuck lubricating oil cotton wheel 85 is provided with gear cover 89, be equipped with on the workstation 6 with the oil trap 90 of gear cover 89 bottom intercommunication, the end of oil trap 90 passes through the pipeline setting and is in oil return groove 86's top. In practical application, gear and the rear chuck lubricating oil cotton wheel 85 on the gear on the preceding chuck 4 and the 5 output of second motor all set up in gear cover 89, through the aforesaid setting, avoid lubricating oil when gear revolve, splash everywhere and pollute laser pipe cutting machine, lubricating oil on the gear cover 89 collects in oil catch bowl 90 because of the effect of gravity, under the direction of oil catch bowl 90 and pipeline, makes lubricating oil collect in oil return tank 86.

In summary, the front chuck 4 for clamping the front part of the pipe, the rear chuck 7 for clamping the rear end of the pipe, the follow-up support mechanism 10 for supporting the pipe in the vertical direction, the opposite clamping mechanism 11 for clamping the pipe in the horizontal direction and the sliding table mechanism 12 for driving the follow-up support mechanism 10 to ascend or descend are arranged, so that the pipe clamping and positioning effects of the laser pipe cutting machine are integrally improved, and the synchronism among the mechanisms is better. Through setting up the slip table drive mechanism that transmission efficiency is high, improve the operation stationarity of synchronizing bar 13 to promote the stationarity of a plurality of follow-up supporting mechanism 10. Through the arrangement of the moving plate 30 and the inclined connecting block 33, the first connecting plate 28 and the first lifting plate 26 ascend or descend along the inclined guide rail 31 relative to the moving plate 30, so that the top of the first lifting plate 26 is always kept in contact with the pipe fittings, and the supporting effect of the pipe fittings (round pipes and square pipes) is further ensured. Through setting up gyro wheel 34, reduce the frictional force of first lifter plate 26 and pipe fitting outer wall, prevent fish tail pipe fitting outer wall. Through setting up a plurality of stoppers and many lifting rails, promote the stability that follow-up supporting mechanism 10 slided and protect it to guarantee the support effect of pipe fitting. Through setting up to pressing from both sides mechanism 11, make to pressing from both sides the shake that produces when mechanism 11 is favorable to restricting tubular product rotation, it is good to the centre gripping effect of pipe fitting, is favorable to the cutting of supplementary tubular product, improves the machining precision of pipe cutting machine. Through setting up forward guide rail 55, forward slider 57 and reverse guide rail 56 and reverse slider 58, make forward grip block 51 and reverse grip block 52 steady movement on the guide rail, avoid producing vibrations to guarantee the centre gripping effect of forward centre gripping post 53 and reverse centre gripping post 54 to the pipe fitting. First forward connecting plate 61 and second forward connecting plate 62, first reverse connecting plate 63 and the reverse connecting plate 64 of second all are the L type, set up two centre gripping posts respectively through both sides to carry out the centre gripping to the pipe fitting, further improve the stability of pipe fitting, avoid the pipe fitting shake. By arranging the forward rotating shaft 65 and the reverse rotating shaft 66 to be matched with the forward clamping column 53 and the reverse clamping column 54, the outer wall of the pipe fitting is protected, and the scratch caused by excessive friction is avoided. The travel switch 69 is matched with the forward limiting block 59 and the reverse limiting block 60, so that the operation of the butt-clamping mechanism 11 is protected. The guide shaft 70 is provided for supporting the second lifting plate 45. The linear bearing 71 is matched with the guide shaft 70, so that the accuracy of the guide shaft 70 is improved, the friction resistance is small, and the second lifting plate 45 can stably ascend or descend. By providing the second avoiding hole 72, the overall size of the opposite clamping mechanism 11 is favorably reduced. The transmission efficiency is improved and the occupied space is small by arranging the moving gear 76 and the moving rack 77 which are meshed with each other. Through setting up waist type hole 79 and locating piece 81, be favorable to making the left and right sides regulation of each mechanism, reduce left and right deviation, promote straight line precision degree. The lubricating oil system can automatically add lubricating oil to the parts needing to be added with lubricating oil regularly on the laser pipe cutting machine, so that the shutdown times are reduced, the working efficiency is improved, and the labor intensity is reduced; and through setting up oil return groove 86 and oil leak hole 87, avoid lubricating oil to drip everywhere, pollute laser pipe cutting machine and workshop environment. The oil outlet amount of the oil outlets is equalized by arranging the pressure check valve 88. Through setting up gear cover 89, avoid lubricating oil when gear revolve, splash everywhere and pollute laser pipe cutting machine.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.

Claims (9)

1. A laser pipe cutter, comprising: the laser welding machine comprises a machine body, a laser head, a first motor, a front chuck, a second motor, a workbench, a rear chuck, a third motor, a moving mechanism, a follow-up supporting mechanism, a butt-clamping mechanism and a sliding table mechanism; the laser head and the front chuck are respectively arranged at the front end of the lathe bed, and the first motor is used for driving the laser head to move along an X axis and a Z axis above the lathe bed; the second motor is used for driving the front chuck to clamp the pipe fitting; the workbench is arranged at the rear end of the lathe bed, the rear chuck is arranged above the workbench, and the third motor is used for driving the rear chuck to clamp the rear end of the pipe fitting; the moving mechanism is used for driving the workbench and the rear chuck to slide on the lathe bed; the follow-up supporting mechanism, the butt-clamping mechanism and the sliding table mechanism are all arranged in the lathe bed, and the follow-up supporting mechanism is used for supporting the pipe fitting; the butt-clamping mechanism is used for clamping the pipe fitting; a first synchronous rod connecting block is arranged on the sliding table mechanism, a second synchronous rod connecting block is arranged on the follow-up supporting mechanism, and the first synchronous rod connecting block and the second synchronous rod connecting block are connected through a synchronous rod; the follow-up supporting mechanism comprises a first lifting cylinder with an upward output end, a first lifting plate arranged in parallel with the first lifting cylinder, a top block arranged on the first lifting plate and connected with the output end of the first lifting cylinder, a first connecting plate in sliding connection with the other side wall of the first lifting plate, a second connecting plate in sliding connection with the other side wall of the first connecting plate, a moving plate arranged on the outer side of the first connecting plate, an inclined guide rail arranged on the moving plate and a horizontal guide rail arranged on the other side wall of the moving plate, wherein one side wall of a second synchronous rod connecting block is connected with the moving plate, and the bottom surface of the second synchronous rod connecting block is arranged on the horizontal guide rail in a sliding manner; the inclined guide rail is arranged obliquely downwards from the front side to the rear side of the moving plate, and the first connecting plate is arranged on the inclined guide rail in a sliding mode through an inclined connecting block.

2. The laser pipe cutting machine according to claim 1, wherein the sliding table mechanism comprises a working surface, sliding table guide rails arranged on two sides of the working surface and extending along the length direction of the machine body, a sliding table sliding block arranged on the sliding table guide rails in a sliding manner, and a sliding table transmission mechanism arranged between the two sliding table guide rails, wherein the sliding table transmission mechanism comprises a lead screw, a lead screw nut, a nut seat, a bearing and a fourth motor; the output ends of the lead screw and the fourth motor extend along the length direction of the lathe bed; the screw nut and the nut seat are respectively arranged on the screw, one end of the screw close to the rear chuck is in transmission connection with the output end of the fourth motor, and the other end of the screw is connected with the working surface through a bearing.

3. The laser pipe cutter of claim 1, wherein the top of the first elevator plate is rotatably provided with rollers.

4. The laser pipe cutting machine of claim 1, wherein the clamp mechanism comprises a mounting plate, a second lifting cylinder, a clamp motor, a rotating gear, a forward rack, a reverse rack, a forward clamping plate, a reverse clamping plate, a forward clamping column, and a reverse clamping column; the output end of the second lifting cylinder is arranged upwards, and the output end of the second lifting cylinder penetrates through the mounting plate and is fixedly connected with the bottom surface of a second lifting plate arranged above the mounting plate; the butt-clamping motor is arranged on the bottom surface of the second lifting plate, and the output end of the butt-clamping motor penetrates through the second lifting plate and is in transmission connection with a rotating gear arranged on the upper surface of the second lifting plate; the forward rack and the reverse rack are arranged in parallel, and teeth of the forward rack and the reverse rack are arranged oppositely and are meshed with the rotating gear; the pipe fitting clamping device is characterized in that a forward clamping plate is arranged on the forward rack in a sliding mode, a forward clamping column is arranged on the forward clamping plate, a reverse clamping plate is arranged on the reverse rack in a sliding mode, a reverse clamping column is arranged on the reverse clamping plate, and the forward clamping column and the reverse clamping column are used for clamping pipe fittings.

5. The laser pipe cutting machine of claim 4, wherein the upper surface of the second lifting plate is further provided with a forward guide rail and a reverse guide rail, the forward guide rail is arranged outside the forward rack, and the reverse guide rail is arranged outside the reverse rack; the forward guide rail, the reverse guide rail, the forward rack and the reverse rack are parallel to each other; a forward sliding block is arranged on the forward guide rail in a sliding manner, and the top of the forward sliding block is fixedly connected with the forward clamping plate; the reverse guide rail is provided with a reverse sliding block in a sliding manner, and the reverse sliding block is fixedly connected with the reverse clamping plate.

6. The laser pipe cutting machine of claim 5, wherein a forward rotating shaft is disposed within the forward clamping column, and the forward clamping column is rotatably disposed outside the forward rotating shaft; the reverse clamping column is internally provided with a reverse rotating shaft, and the reverse clamping column is rotatably arranged outside the reverse rotating shaft.

7. The laser pipe cutter of claim 1, wherein the movement mechanism comprises a movement track, a movement slide, a movement motor, a movement gear, and a movement rack; the movable rails are arranged on two sides of the lathe bed and extend along the length direction of the lathe bed respectively, a movable sliding block matched with the movable rails is arranged on the movable rails in a sliding mode, and the top of each movable sliding block is connected with the bottom surface of the workbench; the output end of the moving motor is arranged downwards, penetrates through the workbench and is in transmission connection with a moving gear arranged below the workbench, the moving rack is arranged on the inner side of the moving track, and the moving rack is meshed with the moving gear.

8. The laser pipe cutter of claim 7, further comprising a lubrication oil system; the lubricating oil system comprises an electric oil supply pump, a lubricating oil separator, a movable rack lubricating oil cotton wheel, a rear chuck lubricating oil cotton wheel, an oil return groove and an oil leakage hole; the electric oil supply pump is connected with an oil inlet of the lubricating oil separator through a pipeline, and an oil outlet of the lubricating oil separator is respectively connected with the movable rack lubricating oil cotton wheel and the rear chuck lubricating oil cotton wheel through pipelines; the lubricating oil cotton wheel of the movable rack is arranged below the workbench and meshed with the movable rack; the lubricating oil cotton wheel of the rear chuck is meshed with the gear on the rear chuck, and the gear on the rear chuck is meshed with the gear on the output end of the third motor; the oil return groove is arranged below the movable rack and the movable track, an oil leakage hole is formed in the front end of the oil return groove, and the oil return groove is used for recovering lubricating oil on the movable rack and the movable track.

9. The laser pipe cutting machine according to claim 8, wherein a pressure check valve is further provided on the lubricant oil separator; and a gear cover is arranged outside the rear chuck lubricating oil cotton wheel.

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