Laser cutting equipment for metal pipe fitting production

Abstract

The invention relates to the technical field of laser cutting devices, in particular to laser cutting equipment for metal pipe fitting production. Comprising a first fixed shell; the double-shaft motor is fixedly connected to the first fixing shell; the multi-stage telescopic rod is rotationally connected to the first fixing shell, a blind hole is formed in the telescopic end of the multi-stage telescopic rod, and a second fixing shell is slidably connected into the blind hole in the telescopic end of the multi-stage telescopic rod; the supporting piece is fixedly connected to the second fixing shell; the rotating shaft is rotationally connected to the supporting piece, and the first connecting rod is provided with a laser cutter; and the plugging block is connected to the second fixing shell in a sliding manner. In the process of fixing the device and the corrugated pipe, the relative positions of the telescopic end of the multi-stage telescopic rod, the second fixing shell and the plugging block are changed, so that the distance between the laser cutter and the inner wall of the corrugated pipe is changed, a laser beam can be correctly focused on a cutting surface, additional measurement is not needed, and the working efficiency is improved. And the cutting efficiency of the metal pipe fitting is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting devices, and in particular to laser cutting equipment for producing metal pipe fittings. Background Art

[0002] Laser cutting mainly relies on a high-energy-density laser beam to heat the material until it melts, and then blows away the molten material through the ejected airflow to achieve cutting. Due to its high efficiency, flexibility and high precision, laser cutting technology is widely used in the metal manufacturing industry.

[0003] During the process of burying large-diameter metal corrugated pipes, if pipe docking is required, the staff will need to use a laser cutting device to cut the metal corrugated pipes at the construction site according to actual usage. When using the current laser cutting device, in order to ensure the accuracy and efficiency of the cutting, the focal point of the laser beam needs to be adjusted to the surface of the workpiece. However, when cutting the corrugated pipe, due to the unevenness of the diameter of the corrugated pipe, it is necessary to measure the radius of the cut portion of the corrugated pipe in advance when cutting each corrugated pipe, and then adjust the laser cutter to the appropriate position before cutting the corrugated pipe. The overall process is relatively cumbersome, which greatly reduces the cutting efficiency of the corrugated pipe and seriously affects the construction progress. Summary of the invention

[0004] In order to overcome the shortcomings of existing laser cutting devices when cutting large-diameter metal bellows, the present invention provides a laser cutting device for metal pipe production.

[0005] The technical implementation scheme of the present invention is: a laser cutting device for metal pipe production, comprising: a first fixed shell; A dual-axis motor is fixedly connected to the interior of the first fixed shell, and the first fixed shell is provided with a support module that is transmission-matched with an output shaft of the dual-axis motor; A multi-stage telescopic rod, rotatably connected to the first fixed shell, the first fixed shell is provided with a driving module for driving the multi-stage telescopic rod to rotate, the telescopic end of the multi-stage telescopic rod is provided with a blind hole, the blind hole of the telescopic end of the multi-stage telescopic rod is slidably connected with a second fixed shell, and a first spring is fixedly connected therebetween, and the second fixed shell is communicated with the blind hole on the telescopic end of the multi-stage telescopic rod; A support member, fixedly connected to the second fixed shell; A rotating shaft, rotatably connected to the support member, the rotating shaft is fixedly connected to a first connecting rod, one end of the first connecting rod is provided with a laser cutter, and the other end of the first connecting rod is ball-connected with a rolling ball; A blocking block is slidably connected to the second fixed shell, a first tension spring is provided between the blocking block and the second fixed shell, and the blocking block and the second fixed shell are in blocking cooperation; A trigger assembly is arranged on the second fixed shell, and the trigger assembly is used to change the position of the laser cutter on the first connecting rod.

[0006] More preferably, the maximum distance between the rotation axis and the rolling ball on the first connecting rod is greater than the maximum distance between the rotation axis and the laser cutter on the first connecting rod, and the difference between the two distances is not greater than the focal length of the laser cutter on the first connecting rod.

[0007] More preferably, the trigger component comprises: A limit block is fixedly connected to one side of the rotating shaft, and the limit block and the support member are fixedly connected to a torsion spring; A limiting column, slidably connected to the support member, the limiting column and the limiting block are in limiting cooperation; A moving block, fixedly connected to one end of the limiting column close to the second fixed shell, wherein the moving block and the supporting member are jointly fixedly connected to a second tension spring; A moving rod, slidably connected to the second fixed shell, the moving rod being fixedly connected to the blocking block via a connecting piece; A moving column is rotatably connected to the moving rod, a second spring is provided between the moving rod and the moving column, and the moving column is limitedly matched with the moving block; A driving assembly is arranged on the first fixed shell, and the driving assembly is used to change the position of the telescopic end of the multi-stage telescopic rod.

[0008] More preferably, an inclined surface is provided on one side of the moving column close to the moving block, and the angle between the inclined surface and the horizontal plane is not less than 45°, and the inclined surface on the moving column is extrusion-fitted with the moving block.

[0009] More preferably, the height difference between the upper side surface of the moving column and the upper side surface of the moving block is not less than the length of the limiting matching portion of the limiting column and the limiting block.

[0010] More preferably, the driving assembly comprises: A driving ring is slidably connected to the first fixed shell, a threaded rod is fixedly connected to the output shaft of the dual-axis motor close to the multi-stage telescopic rod, and the driving ring is threadedly matched with the threaded rod on the output shaft of the dual-axis motor; A rotating ring, slidably connected to the first fixed shell, and the driving ring is rotatably connected to the rotating ring; The second connecting rod is rotatably connected to the rotating ring, and the second connecting rod is rotatably connected to the telescopic end of the multi-stage telescopic rod.

[0011] More preferably, it further includes an adjusting mechanism, which is arranged on the first fixed shell, and the adjusting mechanism is used to change the rotation speed of the multi-stage telescopic rod, and the adjusting mechanism includes: A fixing member, fixedly connected to a side of the first fixing shell close to the multi-stage telescopic rod, the fixing member passing through a fixing portion of the multi-stage telescopic rod; A mounting shell, fixedly connected to a side of the fixing member away from the first fixing shell; A driving motor is fixedly connected to one side of the mounting shell, an output shaft of the driving motor and a side of the multi-stage telescopic rod away from the first fixed shell are both fixedly connected with a connecting circular plate, and the connecting circular plate fixedly connected to the multi-stage telescopic rod is rotatably connected to the mounting shell; There are several arc blocks, all of which are divided into two groups, the two groups of arc blocks are respectively slidably connected to the adjacent connecting circular plates, and the two groups of arc blocks are jointly provided with a transmission belt; There are two movable rings, which are respectively slidably and rotatably connected to the fixing member and the output shaft of the driving motor; The third connecting rods, the number of which is the same as the number of the arc blocks, are rotatably connected between adjacent arc blocks and the moving ring.

[0012] More preferably, the adjustment mechanism further comprises: There are two liquid storage tubes, which are respectively fixed to the inside of the mounting shell and the driving motor; There are two piston rods, which are respectively slidably connected to the inside of the adjacent liquid storage tubes, and the liquid storage tubes and the piston rods therein are jointly provided with elastic members, and the piston rods are rotatably connected to the adjacent moving rings; The first hydraulic telescopic rod is fixedly connected to one side of the first fixed shell, the telescopic end of the first hydraulic telescopic rod is squeezed and matched with the driving ring, and the fixed part of the first hydraulic telescopic rod is fixedly connected to and connected with a connecting pipe that passes through the fixing part and is connected to both of the two liquid storage tubes.

[0013] More preferably, the center of the circle where the arc blocks in the same group are located is located on the central axis of the adjacent connecting circular plates, and the maximum diameter of the circumscribed circle of the arc blocks in the same group is smaller than the diameter of the adjacent connecting circular plates.

[0014] More preferably, a fixing mechanism is further included, which is arranged on the mounting shell, and is used to maintain the stability of the cut portion of the metal tube and detect the wall thickness of the metal tube. The fixing mechanism includes: A plurality of connecting shells, each of which is rotatably connected to a side of the installation shell away from the first fixed shell; The rotating shells have the same number as the connecting shells, and are respectively connected to the connecting shells at one side away from the mounting shell. The rotating shells are provided with internal threads, and the rotating shells are connected to the extension rods through the internal threads. The number of fixed plates is the same as the number of the rotating shells, and they are respectively rotatably connected to the side of the extension rod away from the mounting shell; The threaded rods have the same number as the number of the fixing plates and are respectively threadedly connected to adjacent fixing plates; The number of mounting plates is consistent with the number of the threaded rods, and they are respectively rotatably connected to the ends of adjacent threaded rods away from the mounting shell. One of the mounting plates consists of a telescopic part and a fixed part. The telescopic part of the mounting plate is inlaid with a second hydraulic telescopic rod. The fixed part of the second hydraulic telescopic rod is fixedly connected to and communicated with a connecting pipe that is connected to the connecting pipe on the first hydraulic telescopic rod.

[0015] Compared with the prior art, the present invention has the following advantages: in the process of fixing the device to the corrugated pipe, the present invention changes the relative positions of the telescopic end of the multi-stage telescopic rod, the second fixed shell and the blocking block to change the distance between the laser cutter and the inner wall of the corrugated pipe, so that the laser beam can be correctly focused on the cutting surface, and no additional measurement is required, thereby improving the cutting efficiency of metal pipe fittings.

[0016] The rotation speed of the laser cutter is adjusted by the size of the inner diameter of the bellows to change the length of the moving path of the laser cutter per unit time, change the "dwelling" time of the cutting head relative to the inner wall of the bellows, ensure the completeness of the cutting, reduce the probability of burrs at the cutting point, and improve the cutting quality.

[0017] The moving speed of the laser cutter is adjusted according to the wall thickness of the corrugated tube, and then the action time of the laser heat in the tube is adjusted to ensure a clean and defect-free cutting surface, improve the accuracy of laser cutting, and ensure the integrity of the cutting, avoiding the problem of incomplete cutting in some parts of the corrugated tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a three-dimensional structural cross-sectional view of the first fixed shell of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the multi-stage telescopic rod and the second fixed shell of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating shaft and the first connecting rod of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting column and the moving block of the present invention; Figure 6It is a schematic diagram of the three-dimensional structure of the mounting housing and the driving motor of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the liquid storage tube and the piston rod of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the moving ring and the third connecting rod of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the fixing plate and the threaded rod of the present invention; Fig.10 For the present invention Fig. 9 Enlarged view of the three-dimensional structure at A in the middle.

[0019] The markings of the components in the accompanying drawings are as follows: 1. a first fixed shell, 2. a dual-axis motor, 3. a multi-stage telescopic rod, 4. a second fixed shell, 41. a support member, 5. a rotating shaft, 6. a first connecting rod, 9. a blocking block, 10. a limiting block, 12. a limiting column, 13. a moving block, 14. a moving rod, 15. a moving column, 16. a driving ring, 17. a rotating ring, 18. a second connecting rod, 19. a fixing member, 20. a mounting shell, 21. a driving motor, 22. a connecting circular plate, 23. an arc block, 24. a moving ring, 25. a third connecting rod, 26. a liquid storage tube, 261. a piston rod, 27. a first hydraulic telescopic rod, 28. a fixed plate, 29. a threaded rod, 30. a mounting plate, 31. a second hydraulic telescopic rod, 32. a connecting shell, 33. an extension rod, 34. a rotating shell. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: A laser cutting device for metal pipe production, such as Figure 1-Figure 5As shown, it includes: a first fixed shell 1; a double-axis motor 2, which is fixedly connected to the inside of the first fixed shell 1, and a support module is arranged on the left side of the first fixed shell 1, and the support module is drivingly matched with the output shaft on the left side of the double-axis motor 2; a multi-stage telescopic rod 3, which is rotatably connected to the right side of the first fixed shell 1, and a driving module for driving the multi-stage telescopic rod 3 to rotate is arranged on the first fixed shell 1, and a blind hole is arranged at the telescopic end of the multi-stage telescopic rod 3, and a second fixed shell 4 is slidably connected in the blind hole at the telescopic end of the multi-stage telescopic rod 3, and a first spring is fixedly connected between the two, which is used to drive the second fixed shell 4 to reset to the initial position after the movement, and the second fixed shell 4 and the multi-stage telescopic rod 3 are extended. The blind hole on the retracted end is connected; a support member 41 is fixedly connected to the second fixed shell 4; a rotating shaft 5 is rotatably connected to the support member 41, and the rotating shaft 5 is fixedly connected to a first connecting rod 6, one end of the first connecting rod 6 is provided with a laser cutter, and the other end is ball-connected with a rolling ball; a blocking block 9 is slidably connected to the second fixed shell 4, a first tension spring is provided between the blocking block 9 and the second fixed shell 4, the blocking block 9 is sealed and matched with the second fixed shell 4, and the blocking block 9 is used to change the connection relationship between the second fixed shell 4 and the blind hole on the telescopic end of the multi-stage telescopic rod 3; a trigger component is arranged on the second fixed shell 4, and the trigger component is used to change the position of the laser cutter on the first connecting rod 6.

[0022] In the above scheme, the support module is an existing device, and the figure takes the telescopic support frame as an example for display, and its specific work flow will not be described in detail. The driving module is also an existing device, and its specific work flow will not be described in detail. The blind hole at the telescopic end of the multi-stage telescopic rod 3 is filled with hydraulic oil, and the hydraulic oil in the blind hole at the telescopic end of the multi-stage telescopic rod 3 can flow into the second fixed shell 4. The support member 41 is located on the upper side of the second fixed shell 4. The upper ball of the first connecting rod 6 is connected to a rolling ball, and a laser cutter is provided on the lower side. The rolling ball on the first connecting rod 6 is squeezed and matched with the bellows to determine the radius of the cut position of the bellows. The blocking block 9 can be selected to be made of rubber material to increase the sealing effect between it and the second fixed shell 4. The first tension spring between the blocking block 9 and the second fixed shell 4 is in a stored force state at the initial stage to ensure the sealing relationship between the blocking block 9 and the second fixed shell 4.

[0023] Furthermore, the maximum distance between the rotating shaft 5 and the rolling ball on the first connecting rod 6 is greater than the maximum distance between the rotating shaft 5 and the laser cutter on the first connecting rod 6 , and the difference between the two distances is not greater than the focal length of the laser cutter on the first connecting rod 6 .

[0024] In the above solution, the position of the laser cutter on the first connecting rod 6 is limited to prevent the focal point of the laser cutter from falling normally on the inner wall of the bellows, resulting in incomplete cutting of the bellows during the cutting process.

[0025] Furthermore, the trigger assembly includes: a limit block 10, fixedly connected to one side of the rotating shaft 5, the limit block 10 and the support member 41 are jointly fixed with a torsion spring; a limit column 12, slidably connected to the support member 41, the limit column 12 and the limit block 10 are limited in cooperation; a moving block 13, fixedly connected to one end of the limit column 12 close to the second fixed shell 4, the moving block 13 and the support member 41 are jointly fixed with a second tension spring; a moving rod 14, slidably connected to the second fixed shell 4, the moving rod 14 is fixed to the blocking block 9 through a connecting member; a moving column 15, rotatably connected to the moving rod 14, a second spring is arranged between the moving rod 14 and the moving column 15, the moving column 15 and the moving block 13 are limited in cooperation; a driving assembly, arranged on the first fixed shell 1, the driving assembly is used to change the position of the telescopic end of the multi-stage telescopic rod 3.

[0026] In the above scheme, the torsion spring between the limit block 10 and the support member 41 is already in a force storage state at the initial position, and the torque accumulated by the torsion spring can drive the rotating shaft 5 to rotate 180°. The limit block 10 is limited by the limit column 12, so that the position of the limit block 10 is fixed, and then the torsion spring between the limit block 10 and the support member 41 is maintained in a force storage state. During the movement of the blocking block 9, the moving rod 14 is driven to move synchronously through the transmission of the connecting member. At the same time, the position of the blocking block 9 can be adjusted synchronously by the staff by changing the position of the moving rod 14, so as to adjust the connection relationship between the second fixed shell 4 and the blind hole on the telescopic end of the multi-stage telescopic rod 3. The second spring between the moving rod 14 and the moving column 15 maintains the moving column 15 in a vertical state, and can also drive the moving column 15 to reset after moving. Initially, the moving column 15 is located below the moving block 13, and the two are not in contact.

[0027] Furthermore, an inclined surface is provided on one side of the moving column 15 close to the moving block 13 , and the angle between the inclined surface and the horizontal plane is not less than 45°. The inclined surface on the moving column 15 is pressed and matched with the moving block 13 .

[0028] In the above scheme, the shape of the moving column 15 is limited so that after the moving column 15 moves upward to a position in contact with the moving block 13, the moving column 15 is guided by the moving block 13 to rotate, compressing the second spring between the moving column 15 and the moving rod 14 to store force.

[0029] Furthermore, the height difference between the upper side surface of the movable column 15 and the upper side surface of the movable block 13 is not less than the length of the limiting matching part between the limiting column 12 and the limiting block 10, ensuring that the movable column 15 can drive the limiting column 12 to move downward to a position where it loses contact with the limiting block 10 through the transmission of the movable block 13, so that the limiting block 10 can be reset under the action of the adjacent torsion spring.

[0030] Furthermore, the driving assembly includes: a driving ring 16, which is slidably connected to the first fixed shell 1, and a threaded rod is fixedly connected to the output shaft of the dual-axis motor 2 near the multi-stage telescopic rod 3, and the driving ring 16 is threadedly matched with the threaded rod on the output shaft of the dual-axis motor 2; a rotating ring 17, which is slidably connected to the first fixed shell 1, and the driving ring 16 is rotatably connected to the rotating ring 17; a second connecting rod 18, which is rotatably connected to the rotating ring 17, and the second connecting rod 18 is rotatably connected to the telescopic end of the multi-stage telescopic rod 3.

[0031] In the above scheme, the output shaft on the right side of the dual-axis motor 2 drives the driving ring 16 to move left and right through the threaded rod thereon, and then the driving ring 16 drives the rotating ring 17 to move left and right synchronously. During the movement, the rotating ring 17 changes the position of the right end of the second connecting rod 18, and at the same time, the second connecting rod 18 moves upward due to the reaction force of the telescopic end of the multi-stage telescopic rod 3, and then the second connecting rod 18 drives the telescopic end of the multi-stage telescopic rod 3 to move upward.

[0032] When it is necessary to cut a large-diameter corrugated metal tube (hereinafter referred to as a corrugated tube as an example), the staff will place the device inside the corrugated tube that needs to be cut, and adjust the laser cutter on the first connecting rod 6 to a suitable position. Then the staff will start the dual-axis motor 2, and the output shaft on the left side of the dual-axis motor 2 will drive the support module to move. The support module will fix the device inside the corrugated tube and adjust the position of the center of the device to make it concentric with the corrugated tube.

[0033] During the rotation of the above-mentioned dual-axis motor 2, the output shaft on the right side of the dual-axis motor 2 drives the drive ring 16 to move rightward through the threaded rod thereon, and the drive ring 16 drives the rotating ring 17 to move rightward synchronously. During the movement, the rotating ring 17 squeezes the second connecting rod 18, so that the second connecting rod 18 rotates around the connection between it and the rotating ring 17, and at the same time, the right end of the rotating ring 17 drives the telescopic end of the multi-stage telescopic rod 3 to move upward, changing the position of the second fixed shell 4 until the rolling ball on the first connecting rod 6 moves upward to contact the inner wall of the bellows, and the first connecting rod 6 is squeezed by the inner wall of the bellows and moves downward relative to the first fixed shell 1, and the first connecting rod 6 is driven by the support member 41 so that the second fixed shell 4 is squeezed and moves downward synchronously relative to the first fixed shell 1.

[0034] In the process of the second fixed shell 4 moving downward relative to the first fixed shell 1, the second fixed shell 4 and the first spring in the telescopic end cavity of the multi-stage telescopic rod 3 are compressed and stored, and at the same time, the second fixed shell 4 squeezes the hydraulic oil in the telescopic end cavity of the multi-stage telescopic rod 3, so that the hydraulic oil in the telescopic end cavity of the multi-stage telescopic rod 3 reversely squeezes the blocking block 9, and then the blocking block 9 is subjected to the extrusion force and moves upward relative to the second fixed shell 4, and the first tension spring between the blocking block 9 and the second fixed shell 4 is stretched and stored, until the blocking block 9 moves upward relative to the second fixed shell 4 to lose the blocking cooperation with the second fixed shell 4, and the hydraulic oil in the telescopic end cavity of the multi-stage telescopic rod 3 flows into the second fixed shell 4 until the support module fixes the device inside the bellows, the staff turns off the dual-axis motor 2, and the drive ring 16 stops moving to the right synchronously, at this time, the second fixed shell 4 no longer moves downward relative to the first fixed shell 1, and the blocking block 9 gradually moves downward relative to the first fixed shell 4 under the action of the first tension spring, and re-blocks the port of the second fixed shell 4, and at this time the second fixed shell 4 cannot be reset upward.

[0035] In this section, the blocking block 9, the moving rod 14 and the moving column 15 all move upward relative to the first fixed shell 4 when they move upward. In the process of the blocking block 9 moving upward, the blocking block 9 drives the moving rod 14 to move upward synchronously through the connecting piece, and the moving rod 14 drives the moving column 15 to move upward synchronously until the moving column 15 moves upward to contact the moving block 13. In the process of continuing to move upward, the moving column 15 is squeezed by the moving block 13 and rotates counterclockwise (with the moving column 15 rotating counterclockwise). Figure 5 The viewing angle is taken as the reference viewing angle), and the second spring between the moving column 15 and the moving rod 14 is compressed and stored until the lower side of the inclined surface of the moving column 15 moves upward to the upper side surface of the moving block 13, and the moving column 15 is reset under the action of the second spring. At this time, the moving column 15 can drive the moving block 13 to move synchronously when it moves downward relative to the first fixed shell 4.

[0036] In this section, the blocking block 9, the limiting column 12 and the moving block 13 all move downward relative to the first fixed shell 4. In the process of the blocking block 9 resetting downward relative to the first fixed shell 4, the moving column 15 drives the moving block 13 and the limiting column 12 to move downward synchronously, and the second tension spring between the moving block 13 and the support member 41 is stretched and stored until the blocking block 9 is reset to the initial position (that is, stops moving downward), and the limiting column 12 and the moving block 13 move downward synchronously to the limit position, at which time the limiting column 12 and the limiting block 10 lose the Contact, so that the limit block 10 drives the rotating shaft 5 to rotate 180° under the action of the torsion spring, and then drives the first connecting rod 6 to rotate 180°, and rotates the laser cutter on the first connecting rod 6 to the upper side. At this time, the distance between the laser cutter and the inner wall of the corrugated pipe is the focal length of the laser cutter, ensuring that the laser beam can be correctly focused on the cutting surface. No additional measurement is required, which improves the cutting efficiency of metal pipes and provides sufficient energy density to complete the cutting task, reducing the size of the heat-affected zone, thereby protecting the mechanical properties of the corrugated pipe.

[0037] While the above-mentioned staff shuts down the dual-axis motor 2, the staff starts the driving module and the laser cutter, and the driving module drives the multi-stage telescopic rod 3 to rotate, thereby driving the laser cutter to rotate circumferentially to cut the corrugated tube.

[0038] After the cutting of the corrugated tube is completed, the staff shuts down the laser cutter and the drive module, and starts the dual-axis motor 2 in reverse to separate the device from the corrugated tube, and the staff takes the device out of the corrugated tube. Then the staff pulls the moving rod 14 upward so that the blocking block 9 no longer blocks the second fixed shell 4, so that the hydraulic oil in the second fixed shell 4 can flow back into the cavity of the telescopic part of the multi-stage telescopic rod 3. At this time, the staff can pull the second fixed shell 4 upward until the staff pulls the second fixed shell 4 upward to the initial position, and then resets the moving rod 14 to the initial position.

[0039] After resetting the second fixed shell 4 to the initial position as mentioned above, the staff rotates the first connecting rod 6 180°, so that the laser cutter on the first connecting rod 6 rotates to the lower side again, and then swings the moving column 15 to make the moving column 15 lose contact with the moving block 13, and then the moving block 13 drives the limit column 12 to reset upward under the action of the second tension spring, and the limit column 12 limits the limit block 10 again, so that the device is completely reset to the initial state, so as to prepare for the subsequent cutting of other corrugated tubes.

[0040] Embodiment 2: Based on embodiment 1, Figure 1-Figure 3 and Figure 6-Figure 8As shown, it also includes an adjustment mechanism, which is arranged on the first fixed shell 1, and the adjustment mechanism is used to change the rotation speed of the multi-stage telescopic rod 3. The adjustment mechanism includes: a fixing member 19, which is fixed to the right side of the first fixed shell 1, and the fixing member 19 passes through the fixing part of the multi-stage telescopic rod 3; a mounting shell 20, which is fixed to the right side of the fixing member 19; a driving motor 21, which is fixed to the upper side of the mounting shell 20, and the output shaft of the driving motor 21 and the right side of the multi-stage telescopic rod 3 are fixedly connected with a connecting circular plate 22, which is fixed to the multi-stage telescopic rod 3 The connecting circular plate 22 on it is rotatably connected to the mounting shell 20; there are a plurality of arc blocks 23, all of which are divided into two groups, the two groups of arc blocks 23 are respectively slidably connected to adjacent connecting circular plates 22, and the two groups of arc blocks 23 are jointly provided with a transmission belt; there are two movable rings 24, which are respectively slidably and rotatably connected to the fixed part 19 and the output shaft of the driving motor 21; the third connecting rods 25, the number of which is consistent with the number of the arc blocks 23, are rotatably connected between adjacent arc blocks 23 and the movable rings 24.

[0041] In the above scheme, the adjustment mechanism replaces the driving module in Example 1. The specific number of each group of arc blocks 23 can be specifically selected by the staff in actual use. During the rotation process, the output shaft of the driving motor 21 drives the upper group of arc blocks 23 to rotate through the transmission of the upper side connecting circular plate 22, and then the upper group of arc blocks 23 drives the lower group of arc blocks 23 to rotate through the transmission belt to drive the fixed part of the multi-stage telescopic rod 3 to rotate. At the same time, in order to avoid the two groups of arc blocks 23 from slipping with the transmission belt during use, both groups of arc blocks 23 can be processed with synchronous belt grooves, and the transmission belt can be selected as a synchronous belt. If the transmission belt is selected as a synchronous belt, the third connecting rod 25 needs to be synchronously replaced with an elastic telescopic rod. If the transmission belt is an ordinary belt, the third connecting rod 25 can be selected as a straight rod. By changing the position of the two groups of arc blocks 23, the diameter of the circle where the two groups of arc blocks 23 are located can be changed, that is, the transmission ratio of the two groups of arc blocks 23 is changed.

[0042] Furthermore, the adjustment mechanism also includes: two liquid storage tubes 26, which are respectively fixed to the inside of the mounting shell 20 and the driving motor 21; two piston rods 261, which are respectively slidably connected to the inside of adjacent liquid storage tubes 26, and the liquid storage tubes 26 and the piston rods 261 therein are jointly provided with elastic parts, and the piston rods 261 are rotatably connected to the adjacent movable ring 24; a first hydraulic telescopic rod 27, which is fixed to one side of the first fixed shell 1, and the telescopic end of the first hydraulic telescopic rod 27 is squeezed and matched with the driving ring 16, and the fixed part of the first hydraulic telescopic rod 27 is fixedly connected and connected to a connecting pipe that penetrates the fixing part 19 and is connected to both liquid storage tubes 26.

[0043] In the above scheme, the two liquid storage tubes 26 and the fixed part of the first hydraulic telescopic rod 27 are filled with hydraulic oil, the upper piston rod 261 is in an extended state at the initial position, and the elastic members between the two piston rods 261 and the adjacent liquid storage tubes 26 are tension springs. The part of the upper liquid storage tube 26 connected to the connecting pipe on the first hydraulic telescopic rod 27 is located on its left side, and the part of the lower liquid storage tube 26 connected to the connecting pipe on the first hydraulic telescopic rod 27 is located on its right side. In the process of the drive ring 16 moving to the right, the drive ring 16 squeezes the telescopic end of the first hydraulic telescopic rod 27, so that the hydraulic oil in the fixed part of the first hydraulic telescopic rod 27 is transported to the two liquid storage tubes 26 through the connecting pipe, thereby causing the upper piston rod 261 to move to the right and the lower piston rod 261 to move to the left. When moving, the two piston rods 261 respectively drive the adjacent moving rings 24 to move synchronously.

[0044] Furthermore, the center of the circle where the arc blocks 23 of the same group are located is located on the central axis of the adjacent connecting circular plates 22 , and the maximum diameter of the circumscribed circle of the arc blocks 23 of the same group is smaller than the diameter of the adjacent connecting circular plates 22 .

[0045] During the process of the drive ring 16 moving to the right, the drive ring 16 drives the telescopic end of the first hydraulic telescopic rod 27 to move to the right synchronously, so that the telescopic end of the first hydraulic telescopic rod 27 moves into its fixed part, and the hydraulic oil in its fixed part is transported to the two liquid storage tubes 26, so that the lower piston rod 261 moves to the left under the extrusion force, and the upper piston rod 261 moves to the right under the extrusion force.

[0046] When the piston rod 261 on the upper side moves to the right, the upper moving ring 24 is driven to move to the right synchronously. At the same time, the upper moving ring 24 drives the right end of the upper group of third connecting rods 25 to move to the right synchronously, thereby reducing the distance between the left ends of the upper group of third connecting rods 25. At the same time, the upper group of third connecting rods 25 drive the arc blocks 23 thereon to move synchronously, so as to reduce the diameter of the circumscribed circle of the upper group of arc blocks 23. The moving process of the lower moving ring 24 is opposite to the moving process of the upper moving ring 24, so as to increase the diameter of the circumscribed circle of the lower group of arc blocks 23. When the position of 23 changes, the relative shapes of the transmission belts arranged on the two groups change synchronously, that is, the curvature of the lower side of the transmission belt increases and the curvature of the upper side decreases, thereby reducing the transmission ratio between the drive motor 21 and the multi-stage telescopic rod 3 to reduce the rotation speed of the multi-stage telescopic rod 3, that is, the rotation speed of the laser cutter on the first connecting rod 6 is adjusted by the size of the inner diameter of the bellows to change the length of the moving path of the laser cutter per unit time, change the "dwelling" time of the cutting head relative to the inner wall of the bellows, ensure the completeness of the cutting, reduce the probability of burrs appearing at the cutting point, and improve the cutting quality.

[0047] After the device is fixed to the bellows, the relative position of the two groups of arc blocks 23 no longer changes. Then the staff turns off the dual-axis motor 2 and starts the drive motor 21. The output shaft of the drive motor 21 drives the multi-stage telescopic rod 3 to rotate through the two groups of arc blocks 23 and the transmission belts on the two groups to cut the bellows. After the cutting is completed, the staff turns off the drive motor 21 and reversely starts the dual-axis motor 2 to reset the above parts for subsequent use.

[0048] Embodiment 3: Based on embodiment 2, Figure 1 , Fig. 9 and Fig.10 As shown, it also includes a fixing mechanism, which is arranged on the mounting shell 20. The fixing mechanism is used to maintain the stability of the cut portion of the metal pipe and detect the wall thickness of the metal pipe. The fixing mechanism includes: a connecting shell 32, which has a plurality of them, and each is rotatably connected to the right side of the mounting shell 20; a rotating shell 34, the number of which is the same as the number of the connecting shell 32, and is respectively rotatably connected to the right side of the connecting shell 32, and the rotating shell 34 is provided with an internal thread, and the rotating shell 34 is threadedly connected to the extension rod 33 through the internal thread thereon; a fixing plate 28, the number of which is the same as the number of the rotating shell 34 , respectively rotatably connected to the right side of the extension rod 33; the threaded rods 29, the number of which is consistent with the number of the fixed plates 28, are respectively threadedly connected to the adjacent fixed plates 28; the mounting plates 30, the number of which is consistent with the number of the threaded rods 29, are respectively rotatably connected to the end of the adjacent threaded rods 29 away from the mounting shell 20, one of the mounting plates 30 consists of a telescopic part and a fixed part, the telescopic part of the mounting plate 30 is inlaid with a second hydraulic telescopic rod 31, and the fixed part of the second hydraulic telescopic rod 31 is fixedly connected to and communicated with a connecting pipe connected to the connecting pipe on the first hydraulic telescopic rod 27.

[0049] In the above scheme, the specific number of the connecting shells 32 can be specifically selected by the staff according to the actual use requirements. The figure and the text are shown with three as an example. By rotating the rotating shell 34, the relative position of the connecting shell 32 and the extension rod 33 can be changed, thereby changing the total length of the connecting shell 32 and the adjacent extension rod 33. By rotating the threaded rod 29, the threaded rod 29 can drive the adjacent mounting plates 30 to move up and down synchronously. In the figure and the text, the upper mounting plate 30 is composed of a telescopic part and a fixed part. The second hydraulic telescopic rod 31 is also located on the upper side, but in the actual use process, the specific position of the mounting plate 30 can be adjusted by the staff at will, and the fixed part of the second hydraulic telescopic rod 31 is synchronously filled with hydraulic oil. The telescopic end of the second hydraulic telescopic rod 31 needs to be adjusted by the staff to the position corresponding to the trough of the bellows during use.

[0050] After the above-mentioned staff shut down the dual-axis motor 2, the staff sequentially installs three fixing plates 28 on one end of the corrugated pipe close to the cutting part. The following is a description of the installation process of the upper fixing plate 28 as an example: The staff rotates the upper connecting shell 32 and the rotating shell 34 to move the fixed plate 28 to a position that fits the inner wall of the bellows, and then rotates the upper threaded rod 29, and the upper threaded rod 29 drives the upper mounting plate 30 to move downward synchronously. In this process, the staff adjusts the position of the telescopic end of the mounting plate 30 so that the telescopic end of the second hydraulic telescopic rod 31 on it is located at a trough of the bellows, and the mounting plate 30 drives the second hydraulic telescopic rod 31 to move downward synchronously until the telescopic end of the second hydraulic telescopic rod 31 moves downward to contact the outer wall of the bellows, and the outer wall of the bellows reacts on the telescopic end of the second hydraulic telescopic rod 31, so that the telescopic end of the second hydraulic telescopic rod 31 moves upward under the extrusion force, and then the hydraulic oil in the fixed part of the second hydraulic telescopic rod 31 is transported to the connecting pipe on the first hydraulic telescopic rod 27 through the adjacent connecting pipe, thereby changing the position of the two piston rods 261 again, that is, the rotation speed of the multi-stage telescopic rod 3 is adjusted again.

[0051] After the mounting plate 30 moves downward to contact the outer wall of the bellows, the staff stops rotating the threaded rod 29. At this time, the distance between the fixed plate 28 and the telescopic end of the second hydraulic telescopic rod 31 is the thickness of the bellows. That is, through the above operation, the moving speed of the laser cutter can be adjusted according to the wall thickness of the bellows, and then the action time of the laser heat in the tube can be adjusted to ensure that the cutting surface is clean and free of defects, and to improve the accuracy of laser cutting. At the same time, the integrity of the cutting is ensured to avoid the problem of incomplete cutting of the bellows in some positions.

[0052] The movement process of the other two fixed plates 28 can refer to the above, but the other two mounting plates 30 do not have the telescopic part and the second hydraulic telescopic rod 31, so no additional adjustment is required. After the three fixed plates 28 are fixed, the staff cuts the corrugated pipe according to the above operation. After the cutting is completed, the staff reverses the above parts to separate the device from the corrugated pipe for subsequent continued use.

[0053] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and its improved conception, which should be covered by the protection scope of the present application.

Claims

1. A laser cutting device for metal pipe production, characterized in that it comprises: A first fixed shell (1); A dual-axis motor (2) is fixedly connected to the interior of the first fixed shell (1), and the first fixed shell (1) is provided with a support module that is in driving cooperation with an output shaft of the dual-axis motor (2); A multi-stage telescopic rod (3) is rotatably connected to the first fixed shell (1); a driving module for driving the multi-stage telescopic rod (3) to rotate is provided on the first fixed shell (1); a blind hole is provided at the telescopic end of the multi-stage telescopic rod (3); a second fixed shell (4) is slidably connected in the blind hole at the telescopic end of the multi-stage telescopic rod (3); a first spring is fixedly connected therebetween; and the second fixed shell (4) is communicated with the blind hole at the telescopic end of the multi-stage telescopic rod (3); A support member (41) fixedly connected to the second fixed shell (4); A rotating shaft (5) is rotatably connected to the support member (41), the rotating shaft (5) being fixedly connected to a first connecting rod (6), one end of the first connecting rod (6) being provided with a laser cutter, and the other end of the first connecting rod being ball-connected to a rolling ball; A blocking block (9) is slidably connected to the second fixed shell (4), a first tension spring is provided between the blocking block (9) and the second fixed shell (4), and the blocking block (9) and the second fixed shell (4) are in blocking cooperation; A trigger component is arranged on the second fixed shell (4), and the trigger component is used to change the position of the laser cutter on the first connecting rod (6).

2. A laser cutting device for metal pipe production according to claim 1, characterized in that: The maximum distance between the rotating shaft (5) and the rolling ball on the first connecting rod (6) is greater than the maximum distance between the rotating shaft (5) and the laser cutter on the first connecting rod (6), and the difference between the two distances is not greater than the focal length of the laser cutter on the first connecting rod (6).

3. A laser cutting device for metal pipe production according to claim 1, characterized in that: The trigger component comprises: A limit block (10) is fixedly connected to one side of the rotating shaft (5), and the limit block (10) and the support member (41) are fixedly connected to a torsion spring; A limiting column (12) is slidably connected to the support member (41), and the limiting column (12) is in limiting cooperation with the limiting block (10); A moving block (13) is fixedly connected to one end of the limiting column (12) close to the second fixed shell (4), and the moving block (13) and the supporting member (41) are fixedly connected to a second tension spring; A moving rod (14) is slidably connected to the second fixed shell (4), and the moving rod (14) is fixedly connected to the blocking block (9) via a connecting piece; A moving column (15) is rotatably connected to the moving rod (14), a second spring is provided between the moving rod (14) and the moving column (15), and the moving column (15) is limitedly matched with the moving block (13); A drive assembly is arranged on the first fixed shell (1), and the drive assembly is used to change the position of the telescopic end of the multi-stage telescopic rod (3).

4. A laser cutting device for producing metal pipes according to claim 3, characterized in that: An inclined surface is provided on one side of the moving column (15) close to the moving block (13), and the angle between the inclined surface and the horizontal plane is not less than 45°. The inclined surface on the moving column (15) is pressed and matched with the moving block (13).

5. A laser cutting device for producing metal pipes according to claim 3, characterized in that: The height difference between the upper side surface of the moving column (15) and the upper side surface of the moving block (13) is not less than the length of the limiting matching portion between the limiting column (12) and the limiting block (10).

6. A laser cutting device for producing metal pipes according to claim 3, characterized in that: The drive assembly comprises: A drive ring (16) is slidably connected to the first fixed shell (1); a threaded rod is fixedly connected to the output shaft of the dual-axis motor (2) close to the multi-stage telescopic rod (3); the drive ring (16) is threadably matched with the threaded rod on the output shaft of the dual-axis motor (2); A rotating ring (17) is slidably connected to the first fixed shell (1), and the driving ring (16) is rotationally connected to the rotating ring (17); The second connecting rod (18) is rotatably connected to the rotating ring (17), and the second connecting rod (18) is rotatably connected to the telescopic end of the multi-stage telescopic rod (3).

7. A laser cutting device for producing metal pipes according to claim 6, characterized in that: It also includes an adjustment mechanism, which is arranged on the first fixed shell (1), and is used to change the rotation speed of the multi-stage telescopic rod (3). The adjustment mechanism includes: A fixing member (19) fixedly connected to a side of the first fixing shell (1) close to the multi-stage telescopic rod (3), the fixing member (19) passing through a fixing portion of the multi-stage telescopic rod (3); A mounting shell (20) fixedly connected to a side of the fixing member (19) away from the first fixing shell (1); A drive motor (21) is fixedly connected to one side of the mounting shell (20); an output shaft of the drive motor (21) and a side of the multi-stage telescopic rod (3) away from the first fixed shell (1) are both fixedly connected with a connecting circular plate (22); the connecting circular plate (22) fixedly connected to the multi-stage telescopic rod (3) is rotatably connected to the mounting shell (20); There are a plurality of arc-shaped blocks (23), all of which are divided into two groups, the two groups of arc-shaped blocks (23) are respectively slidably connected to adjacent connecting circular plates (22), and the two groups of arc-shaped blocks (23) are jointly provided with a transmission belt; A movable ring (24) having two output shafts respectively slidably and rotatably connected to the fixing member (19) and the driving motor (21); The third connecting rods (25) are provided in the same number as the arc-shaped blocks (23) and are rotatably connected between adjacent arc-shaped blocks (23) and the movable ring (24).

8. A laser cutting device for producing metal pipes according to claim 7, characterized in that: The regulating mechanism also includes: There are two liquid storage tubes (26), which are respectively fixed to the inside of the mounting shell (20) and the driving motor (21); There are two piston rods (261), which are respectively slidably connected to the inside of the adjacent liquid storage tubes (26); the liquid storage tubes (26) and the piston rods (261) therein are provided with elastic members; the piston rods (261) are rotatably connected to the adjacent moving rings (24); A first hydraulic telescopic rod (27) is fixedly connected to one side of the first fixed shell (1); a telescopic end of the first hydraulic telescopic rod (27) is extruded and fitted with the drive ring (16); a fixed portion of the first hydraulic telescopic rod (27) is fixedly connected to and communicated with a connecting pipe that passes through the fixing member (19) and is connected to both of the two liquid storage tubes (26).

9. A laser cutting device for producing metal pipes according to claim 7, characterized in that: The center of the circle where the arc blocks (23) of the same group are located is located on the central axis of the adjacent connecting circular plate (22), and the maximum diameter of the circumscribed circle of the arc blocks (23) of the same group is smaller than the diameter of the adjacent connecting circular plate (22).

10. A laser cutting device for producing metal pipes according to claim 8, characterized in that: It also includes a fixing mechanism, which is arranged on the mounting shell (20), and is used to maintain the stability of the cut portion of the metal tube and detect the wall thickness of the metal tube. The fixing mechanism includes: A plurality of connecting shells (32) each of which is rotatably connected to a side of the mounting shell (20) away from the first fixed shell (1); Rotating shells (34), the number of which is the same as the number of the connecting shells (32), and are respectively rotatably connected to a side of the connecting shell (32) away from the mounting shell (20), the rotating shell (34) being provided with an internal thread, and the rotating shell (34) being threadably connected to the extension rod (33) via the internal thread thereon; The number of fixed plates (28) is the same as the number of the rotating shells (34), and they are respectively rotatably connected to a side of the extension rod (33) away from the mounting shell (20); Threaded rods (29), the number of which is the same as the number of the fixing plates (28), and are respectively threadedly connected to adjacent fixing plates (28); The number of mounting plates (30) is the same as the number of the threaded rods (29), and they are respectively rotatably connected to one end of an adjacent threaded rod (29) away from the mounting shell (20), wherein one of the mounting plates (30) is composed of a telescopic portion and a fixed portion, the telescopic portion of the mounting plate (30) being inlaid with a second hydraulic telescopic rod (31), and the fixed portion of the second hydraulic telescopic rod (31) being fixedly connected to and in communication with a connecting pipe that is in communication with a connecting pipe on the first hydraulic telescopic rod (27).

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