Intelligent production line equipment with special-shaped square tubes and production method of intelligent production line equipment

Abstract

The invention belongs to the technical field of metal pipe machining, and provides intelligent production line equipment with special-shaped square pipes and a production method thereof.The intelligent production line equipment comprises a bottom plate, mounting plates are symmetrically arranged at the top of the bottom plate, conveying rollers distributed at intervals are arranged between the two mounting plates, a power mechanism is arranged on the conveying rollers, and the power mechanism drives the pipes to move on the conveying rollers; conveying and clamping assemblies are arranged on the outer side walls of the two mounting plates, bearing plates are further included, the bearing plates are symmetrically installed on the sides of outlets of the conveying rollers, first mounting shafts distributed up and down are symmetrically arranged between the two bearing plates, positioning rollers are symmetrically arranged on each first mounting shaft, and mounting frames are arranged on the sides, away from the mounting plates, of the bearing plates; mounting shafts II which are distributed left and right are symmetrically arranged in the mounting frame, forming rollers are arranged on the mounting shafts II, and the pipe fitting penetrates through the positioning rollers and the forming rollers to be machined; by designing the adjustable modular roller press unit, machining forming of different special-shaped square pipes can be achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal pipe processing, and specifically relates to an intelligent production line equipment for special-shaped square pipes and a production method thereof. Background Art

[0002] Special-shaped square pipes are pipes with non-standard square cross-sections, and their shapes and sizes can be customized according to specific requirements. They are widely used in many fields such as construction, machinery manufacturing, automotive industry, aerospace, and furniture decoration.

[0003] The special-shaped square pipe production line generally adopts a split-type equipment combination (such as uncoiling → roll forming → high-frequency welding → fixed-length cutting), but there are the following technical bottlenecks: when producing different special-shaped square pipes (such as trapezoidal, corrugated wall, variable cross-section pipes), the molds need to be frequently replaced, and the mold replacement may waste processing time, resulting in a reduction in processing efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an intelligent production line equipment for special-shaped square pipes and a production method thereof, so as to solve the problems in the prior art such as long mold replacement time and influence on processing efficiency during the production of different special-shaped square pipes.

[0005] An intelligent production line equipment for special-shaped square pipes includes a bottom plate. On the top of the bottom plate, mounting plates are symmetrically arranged. Between the two mounting plates, conveying rollers are arranged at intervals. A power mechanism is provided on the conveying rollers, and the power mechanism drives the pipe fittings to move on the conveying rollers. Conveying and clamping assemblies are arranged on the outer side walls of the two mounting plates;

[0006] It further includes a bearing plate, which is symmetrically installed on one side of the outlet of the conveying rollers. Between the two bearing plates, mounting shafts I are symmetrically arranged up and down. Positioning rollers are symmetrically arranged on each mounting shaft I. An installation frame is arranged on the side of the bearing plate away from the mounting plate. In the installation frame, mounting shafts II are symmetrically arranged left and right. Forming rollers are arranged on the mounting shafts II. A quick-release assembly is arranged between the mounting shafts II and the installation frame. The pipe fittings pass through the positioning rollers and the forming rollers to complete processing.

[0007] Preferably, the power mechanism includes a conveyor belt and a first motor. The conveyor belt is connected between two adjacent conveying rollers and is arranged close to the side wall of the mounting plate. Two conveyor belts are connected to both ends of each conveying roller. The conveyor belt on one side is connected forward to another conveying roller, and the conveyor belt on the other side is connected backward to another conveying roller. The number of the first motors is two, and they are externally powered and installed on the outer wall of the mounting plate. The output shafts of the first motors are respectively connected to the conveying rollers at both ends.

[0008] Preferably, the conveying and clamping assembly includes a clamping disc, a positioning rod frame, rolling balls and a clamping cylinder. The clamping disc is movably connected to the conveyor roller, and the number of clamping discs on each conveyor roller is two. The positioning rod frame is movably installed on the mounting plate.

[0009] Preferably, the positioning rod frame has two layers of spaced-apart support rod portions. The rolling balls are movably embedded in the support rod portions, and the rolling balls are in rolling contact with the side wall of the clamping disc. The number of rolling balls on one side of each clamping disc is two. The clamping cylinders are symmetrically arranged on the outer side of the mounting plate, and the piston rod of the clamping cylinder is fixedly connected to the positioning rod frame.

[0010] Preferably, the bearing plate is provided with through lifting holes, and the two lifting holes are opposite in position. The first mounting shaft extends out of the lifting holes. A vertical bidirectional lead screw is provided on the side of the bearing plate away from the positioning roller. Lifting blocks are symmetrically arranged on the bidirectional lead screw, and the end of the first mounting shaft is rotatably connected to the lifting block.

[0011] Preferably, a ball nut is provided in the lifting block, and the ball nut cooperates with the bidirectional lead screw. A second motor connected to an external power supply is provided at a position near the bottom of the bearing plate, and the second motor cooperates with the bidirectional lead screw. A strain sensor is provided on the side wall of each positioning roller close to the bearing plate, and the strain sensor is connected to the second motor through a controller.

[0012] Preferably, the vertical cross-sectional profile of the installation frame is "concave". The quick-release assembly includes an installation channel, a stepped hole, a limiting disc, a baffle and a cover plate. The installation channel is opened on the opposite side walls of the left and right top plates of the installation frame. The stepped hole is vertically arranged at the other end of the installation channel. The diameter of the second mounting shaft matches the internal width of the installation channel. The limiting disc is fixedly connected to the top of the second mounting shaft, and the limiting disc cooperates with the stepped hole, and the diameter of the limiting disc is larger than the diameter of the second mounting shaft.

[0013] Preferably, the baffle is installed at the top plate of the installation frame near the left and right side walls. The cover plate is movably connected between the two baffles. After the second mounting shaft and the limiting disc are placed into the stepped hole, the cover plate covers the top of the stepped hole. Locking screws are provided between the cover plate and the installation frame. A guiding block is fixedly connected to the bottom of the second mounting shaft, and a sliding block is threadedly connected to the bottom of the guiding block. A guiding track is provided at the inner bottom end of the installation frame, and the sliding block is slidably installed on the guiding track.

[0014] Preferably, the positioning roller and the clamping roller are spaced above the bottom plate. A placement frame is provided on the top of the bottom plate. Three-dimensional laser detection lamps are provided on the opposite inner surfaces of the placement frame. A laser rangefinder is provided on the top of the placement frame. The detection probe of the laser rangefinder is vertically downward and hits the square pipe after processing.

[0015] An intelligent production method for special-shaped square pipes includes the following specific steps:

[0016] S1: First, place the pipe fittings to be processed on the conveyor rollers. The initial shape of the pipe fittings to be processed is processed into a circular shape. When the first motor is started, the first motor drives the connected conveyor rollers to rotate. The other conveyor rollers are connected to each other through the conveyor belt to achieve rotation in the same direction together, driving the pipe fittings to move in the processing direction;

[0017] The clamping cylinder is started. The piston rod of the clamping cylinder is connected to the positioning rod frame. The end of the positioning rod frame is movably embedded with the rolling ball. By moving the piston rod forward, the rolling ball rolls and fits with the clamping disc. The clamping disc is movably connected to the conveyor roller, thereby driving the clamping disc to move towards the pipe fittings on the conveyor roller and finally fitting with the pipe fittings, ensuring that the position of the pipe fittings does not shift during transportation;

[0018] S2: When the pipe fittings are conveyed out from the conveyor rollers, they enter between the two bearing plates. There is a first mounting shaft between the two bearing plates. The positioning roller is fixedly connected to the first positioning shaft. The pipe fittings pass through between the upper and lower positioning rollers, so as to prevent the pipe fittings from moving during further processing. There is a strain sensor on the positioning roller. The pressure applied to the pipe fittings can be detected through the strain sensor. When the detected pressure value is lower or higher than the preset pressure value, the controller drives the second motor to start. The output shaft of the second motor cooperates with the bidirectional lead screw, so as to drive the two lifting blocks to approach or move away from each other through the ball nut, adjusting the distance between the upper and lower positioning rollers, improving the intelligent level of pipe fitting production, not only ensuring the clamping degree of the pipe fittings, but also effectively avoiding the situation of deformation caused by excessive applied pressure;

[0019] S3: After being positioned by the positioning roller, the pipe will immediately enter between the forming rollers arranged on the left and right. The working surface of the forming roller is provided with a forming groove matching the cross-sectional shape of the target special-shaped square pipe. The grooves of the two forming rollers form a closed cavity. Therefore, when the pipe passes between the two forming rollers, the forming rollers apply pressure to the pipe to process it into a special-shaped square pipe. When processing special-shaped square pipes of different shapes, there are multiple types of forming rollers. Remove the cover plate from the top of the installation frame to expose the stepped hole. Remove the screw between the guide block and the sliding block, and the second installation shaft and the limit disk can be lifted upward through the installation channel, and the second installation shaft and the limit disk can be taken out as a whole. Install the corresponding forming roller in the installation frame again. When different special-shaped square pipes need to be processed, it can be quickly disassembled and replaced, improving the processing efficiency;

[0020] S4: After the special-shaped square pipe is processed, it will enter the placement frame. The three-dimensional laser detection lights on both sides inside the placement frame emit laser to detect the outer contour of the special-shaped pipe fitting, and send the detected data to external equipment to compare with the standard model tolerance and generate a quality report in real time. Thus, the error between the processed special-shaped square pipe and the standard model can be known, further improving the intelligent production level of the special-shaped square pipe. The set laser rangefinder can also monitor the distance of the processed special-shaped square pipe, facilitating the next equidistant cutting of the special-shaped square pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can convey the pipe fitting by arranging the transfer rollers distributed at intervals between the two mounting plates, and convey it to the positioning rollers between the upper and lower layers. The positioning rollers position the pipe fitting to be processed, ensuring the stability during the pipe fitting processing and avoiding deviation. Then it enters between the two forming rollers to complete the processing and production of the special-shaped square pipe. At the same time, the forming roller is rotatably connected to the second installation shaft, and the second installation shaft can be quickly disassembled through the set quick-disassembly component. When processing different special-shaped square pipes, the forming roller can be quickly replaced, improving the processing efficiency.

[0023] 2. The present invention installs three-dimensional laser detection lights on both sides inside the placement frame. The three-dimensional laser detection lights emit laser to detect the outer contour of the special-shaped pipe fitting, and send the detected data to external equipment to compare with the standard model tolerance and generate a quality report in real time. Thus, the error between the processed special-shaped square pipe and the standard model can be known, further improving the intelligent production level of the special-shaped square pipe. Description of the Drawings

[0024] Figure 1Schematic diagram of the component structure of the integral special-shaped square pipe production line equipment of the present invention;

[0025] Figure 2 Schematic diagram of the component structure of the conveyor belt, conveyor roller, etc. of the present invention;

[0026] Figure 3 Schematic diagram of the component structure of the positioning rod frame, rolling ball, etc. of the present invention;

[0027] Figure 4 Schematic diagram of the component structure of the positioning roller, forming roller, etc. of the present invention;

[0028] Figure 5 Schematic diagram of the component structure of the bearing plate, bidirectional lead screw, etc. of the present invention;

[0029] Figure 6 Schematic diagram of the component structure of the installation frame, forming roller, etc. of the present invention;

[0030] Figure 7 Schematic diagram of the component structure of the cover plate, stepped hole, etc. of the present invention;

[0031] Figure 8 Schematic diagram of the component structure of the second installation shaft, sliding block, etc. of the present invention;

[0032] Figure 9 Schematic diagram of the component structure of the placement frame, three-dimensional laser detection lamp, etc. of the present invention.

[0033] In the figure:

[0034] 1. Bottom plate; 2. Installation plate; 3. Conveyor roller; 4. Bearing plate; 5. First installation shaft; 6. Positioning roller; 7. Installation frame; 8. Second installation shaft; 9. Forming roller; 10. Conveyor belt; 11. First motor; 12. Clamping disc; 13. Positioning rod frame; 13-1. Support rod part; 14. Rolling ball; 15. Clamping cylinder; 16. Lifting hole; 17. Bidirectional lead screw; 18. Lifting block; 19. Ball nut; 20. Second motor; 21. Strain sensor; 22. Installation channel; 23. Stepped hole; 24. Limiting disc; 25. Baffle; 26. Cover plate; 27. Locking screw; 28. Guide block; 29. Sliding block; 30. Guide track; 31. Placement frame; 32. Three-dimensional laser detection lamp; 33. Laser rangefinder. Detailed implementation manners

[0035] The following further describes in detail the implementation manners of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0036] As shown in the attached Figure 1 to the attached Figure 9 figure:

[0037] Embodiment 1: The present invention provides an intelligent production line equipment for special-shaped square pipes, including a bottom plate 1. Installation plates 2 are symmetrically arranged on the top of the bottom plate 1. Transmission rollers 3 are arranged at intervals between the two installation plates 2. A power mechanism is provided on the transmission rollers 3, and the power mechanism drives the pipe fittings to move on the transmission rollers 3. A conveying and clamping assembly is arranged on the outer side walls of the two installation plates 2;

[0038] It further includes a bearing plate 4. The bearing plate 4 is symmetrically installed on one side of the outlet of the transmission rollers 3. Installation shafts 1 are symmetrically arranged up and down between the two bearing plates 4. Positioning rollers 6 are symmetrically arranged on each installation shaft 1. An installation frame 7 is arranged on the side of the bearing plate 4 away from the installation plate 2. Installation shafts 2 are symmetrically arranged left and right in the installation frame 7. Forming rollers 9 are arranged on the installation shafts 2. A quick-release component is arranged between the installation shafts 2 and the installation frame 7. The pipe fittings pass through the positioning rollers 6 and the forming rollers 9 to complete the processing.

[0039] It should be noted that by arranging the transmission rollers 3 at intervals between the two installation plates 2, the pipe fittings can be transmitted, and transmitted to the positioning rollers 6 between the upper and lower layers. The positioning rollers 6 are used to position the pipe fittings to be processed, ensuring the stability during the processing of the pipe fittings and avoiding deviation. Then it enters between the two forming rollers 9 to complete the processing and production of the special-shaped square pipes. At the same time, the forming rollers 9 are rotatably connected to the installation shafts 2. Through the arranged quick-release component, the installation shafts 2 can be quickly disassembled. When processing different special-shaped square pipes, the forming rollers 9 can be quickly replaced to improve the processing efficiency.

[0040] In this embodiment, the power mechanism includes a conveyor belt 10 and a motor 1. The conveyor belt 10 is connected between two adjacent transmission rollers 3 and is arranged close to the side wall of the installation plate 2. And two conveyor belts 10 are connected to both ends of each transmission roller 3. The conveyor belt 10 on one side is connected forward to another transmission roller 3, and the conveyor belt 10 on the other side is connected backward to another transmission roller 3. The number of motors 1 is two and they are externally powered and installed on the outer wall of the installation plate 2. The output shafts of the motors 1 are respectively connected to the transmission rollers 3 at both ends.

[0041] It should be noted that by connecting the transmission rollers 3 arranged at intervals with multiple conveyor belts 10, after the motor 1 is started, it will drive the overall transmission rollers 3 to rotate, thereby realizing the transmission of the pipe fittings to be processed and improving the degree of automation in processing.

[0042] In this embodiment, the conveying and clamping assembly includes a clamping disc 12, a positioning rod frame 13, a rolling ball 14 and a clamping cylinder 15. The clamping disc 12 is movably connected to the transmission roller 3, and the number of clamping discs 12 on each transmission roller 3 is two. The positioning rod frame 13 is movably installed on the installation plate 2.

[0043] In this embodiment, the positioning rod holder 13 has two layers of rod portions 13-1 distributed at intervals. The rolling balls 14 are movably embedded in the rod portions 13-1, and the rolling balls 14 are in rolling contact with the side wall of the clamping disc 12. The number of rolling balls 14 on one side of each clamping disc 12 is two. The clamping cylinders 15 are symmetrically arranged on the outer side of the mounting plate 2, and the piston rods of the clamping cylinders 15 are fixedly connected to the positioning rod holder 13.

[0044] It should be noted that through the arranged conveying and clamping assembly, when the clamping cylinder 15 is started, the positioning rod holder 13 will cause the rolling balls 14 on the rod portions 13-1 to push the clamping disc 12 towards the pipe fitting. When the two sides of the pipe fitting are in contact, even if the clamping disc 12 rotates together with the conveying roller 3, it will not affect the movement of the pipe fitting, ensuring that the position of the pipe fitting does not shift during the conveying process and enabling it to enter between the two positioning rollers 6 to complete positioning.

[0045] In this embodiment, through holes 16 are provided in the bearing plate 4, and the two through holes 16 are opposite in position. The first mounting shaft 5 extends out of the through holes 16. On the side of the bearing plate 4 away from the positioning roller 6, a vertical bidirectional lead screw 17 is provided. Lifting blocks 18 are symmetrically arranged on the bidirectional lead screw 17, and the end of the first mounting shaft 5 is rotatably connected in the lifting blocks 18.

[0046] In this embodiment, a ball nut 19 is provided in the lifting block 18, and the ball nut 19 cooperates with the bidirectional lead screw 17. A motor two 20 with an external power supply is provided on the bearing plate 4 near the bottom position, and the motor two 20 cooperates with the bidirectional lead screw 17. A strain sensor 21 is provided on the side wall of each positioning roller 6 close to the bearing plate 4, and the strain sensor 21 is connected to the motor two 20 through a controller.

[0047] It should be noted that when the pipe fitting is conveyed out from the conveying roller 3 and enters between the two bearing plates 4, there is a first mounting shaft 5 between the two bearing plates 4, and the positioning roller 6 is fixedly connected to the first positioning shaft. The pipe fitting will pass through between the upper and lower positioning rollers 6, so as to prevent the pipe fitting from moving during the further processing. There is a strain sensor 21 on the positioning roller 6. The pressure applied to the pipe fitting can be detected through the strain sensor 21. When the detected pressure value is lower or higher than the preset pressure value, the controller is configured with a PID adjustment module, and the rotation speed of the motor two 20 is dynamically adjusted according to the feedback value of the strain sensor 21. The output shaft of the motor two 20 cooperates with the bidirectional lead screw 17, so as to drive the two lifting blocks 18 to approach or move away from each other through the ball nut 19, and adjust the distance between the upper and lower positioning rollers 6, improving the intelligent degree of the production of the pipe fitting. It can not only ensure the clamping degree of the pipe fitting, but also effectively avoid the situation of deformation caused by excessive applied pressure.

[0048] In this embodiment, the vertical cross-sectional profile of the installation frame 7 is "concave". The quick-release assembly includes an installation channel 22, a stepped hole 23, a limit disk 24, a baffle 25, and a cover plate 26. The installation channel 22 is opened on the opposite side walls of the left and right top plates of the installation frame 7. The stepped hole 23 is vertically arranged at the other end of the installation channel 22. The diameter of the second installation shaft 8 matches the internal width of the installation channel 22. The limit disk 24 is fixedly connected to the top of the second installation shaft 8. The limit disk 24 cooperates with the stepped hole 23, and the diameter of the limit disk 24 is larger than that of the second installation shaft 8.

[0049] It should be noted that by setting the diameter of the limit disk 24 to be larger than that of the second installation shaft 8, after the forming roller 9 is installed, the limit disk 24 will be placed in the stepped hole 23, so that the second installation shaft 8 will not detach from the installation frame 7. When the forming roller 9 needs to be replaced, it is also necessary to first lift the limit disk 24 upward to make the second installation shaft 8 come out of the installation channel 22 before the second installation shaft 8 can be taken out of the installation frame 7.

[0050] In this embodiment, the baffle 25 is installed at the top plate of the installation frame 7 near the left and right side walls. The cover plate 26 is movably connected between the two baffles 25. After the second installation shaft 8 and the limit disk 24 are placed in the stepped hole 23, the cover plate 26 covers the top of the stepped hole 23. There is a locking screw 27 between the cover plate 26 and the installation frame 7. A guiding block 28 is fixedly connected to the bottom of the second installation shaft 8. A sliding block 29 is threadedly connected to the bottom of the guiding block 28. A guiding track 30 is provided at the inner bottom end of the installation frame 7. The sliding block 29 is slidably installed on the guiding track 30.

[0051] It should be noted that when the positioning roller 6 finishes positioning and comes out, it will immediately enter between the left and right forming rollers 9. The forming rollers 9 are arranged according to the shape of the special-shaped square pipe to be processed. Thus, when passing through between the two forming rollers 9, the pipe fitting will be processed into a special-shaped square pipe. When processing special-shaped square pipes of different shapes, there are multiple types of forming rollers 9. Remove the cover plate 26 from the top of the installation frame 7 to expose the stepped hole 23. Remove the screw between the guiding block 28 and the sliding block 29, and the second installation shaft 8 and the limit disk 24 can be lifted upward and passed through the installation channel 22, and the second installation shaft 8 and the limit disk 24 can be taken out as a whole. Install the corresponding forming roller 9 in the installation frame 7 again. When different special-shaped square pipes need to be processed, it can be quickly disassembled and replaced, improving the processing efficiency.

[0052] In this embodiment, the positioning roller 6 and the clamping roller are spaced apart above the bottom plate 1. A placing frame 31 is provided at the top of the bottom plate 1. Three-dimensional laser detection lights 32 are provided on the opposite inner surfaces of the placing frame 31. A laser rangefinder 33 is provided at the top of the placing frame 31. The detection probe of the laser rangefinder 33 is vertically downward and hits the processed square pipe.

[0053] It should be noted that after the special-shaped square pipe is processed, it will enter the placement frame 31. The three-dimensional laser detection lights 32 on both sides inside the placement frame 31 emit lasers to detect the outer contour of the special-shaped pipe fitting. The three-dimensional laser detection lights 32 adopt a cross-scanning method, which can establish a three-dimensional point cloud model of the pipe fitting, send the detected data to external equipment, compare the tolerance of the standard model, and generate a quality report in real time, so as to know the error between the processed special-shaped square pipe and the standard model, further improving the intelligent production level of the special-shaped square pipe. The set laser rangefinder 33 can also monitor the distance of the produced special-shaped square pipe, thus facilitating the next equidistant cutting of the special-shaped square pipe.

[0054] The embodiments of the present invention are given for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An intelligent production line equipment for special-shaped square pipes, characterized in that: Including: A bottom plate (1), mounting plates (2) are symmetrically arranged at the top of the bottom plate (1), conveying rollers (3) are arranged at intervals between the two mounting plates (2), a power mechanism is arranged on the conveying rollers (3), and the power mechanism drives the pipe fittings to move on the conveying rollers (3), and conveying and clamping assemblies are arranged on the outer side walls of the two mounting plates (2); It further includes a bearing plate (4), the bearing plate (4) is symmetrically installed on one side of the outlet of the conveying rollers (3), mounting shafts one (5) are symmetrically arranged up and down between the two bearing plates (4), positioning rollers (6) are symmetrically arranged on each mounting shaft one (5), an installation frame (7) is arranged on the side of the bearing plate (4) away from the mounting plate (2), mounting shafts two (8) are symmetrically arranged left and right in the installation frame (7), forming rollers (9) are arranged on the mounting shafts two (8), a quick-release assembly is arranged between the mounting shafts two (8) and the installation frame (7), and the pipe fittings pass through the positioning rollers (6) and the forming rollers (9) to complete processing.

2. The intelligent production line equipment for special-shaped square pipes as described in claim 1, characterized in that: The power mechanism includes a conveyor belt (10) and a motor one (11), the conveyor belt (10) is connected between two adjacent conveying rollers (3) and is arranged close to the side wall of the mounting plate (2), and two conveyor belts (10) are connected to both ends of each conveying roller (3), the conveyor belt (10) on one side is connected forward to another conveying roller (3), the conveyor belt (10) on the other side is connected backward to another conveying roller (3), the number of motors one (11) is two and they are externally powered and installed on the outer wall of the mounting plate (2), and the output shafts of the motors one (11) are respectively connected to the conveying rollers (3) at both ends.

3. The intelligent production line equipment for special-shaped square pipes according to claim 2, wherein: The conveying and clamping assembly includes clamping discs (12), positioning rod frames (13), rolling balls (14) and clamping cylinders (15), the clamping discs (12) are movably connected to the conveying rollers (3), and the number of clamping discs (12) on each conveying roller (3) is two, and the positioning rod frames (13) are movably installed on the mounting plates (2).

4. The intelligent production line equipment with a special-shaped square pipe as claimed in claim 3, wherein: The positioning rod frame (13) has two layers of spaced-apart support rod parts (13-1), the rolling balls (14) are movably embedded in the support rod parts (13-1), and the rolling balls (14) are in rolling contact with the side walls of the clamping discs (12), the number of rolling balls (14) on one side of each clamping disc (12) is two, the clamping cylinders (15) are symmetrically arranged on the outer sides of the mounting plates (2), and the piston rods of the clamping cylinders (15) are fixedly connected to the positioning rod frames (13).

5. The intelligent production line equipment with a special-shaped square pipe as claimed in claim 1, characterized in that: Lifting holes (16) are arranged through the bearing plate (4), and the two lifting holes (16) are opposite in position, the mounting shafts one (5) extend out of the lifting holes (16), a vertical bidirectional lead screw (17) is arranged on the side of the bearing plate (4) away from the positioning rollers (6), lifting blocks (18) are symmetrically arranged on the bidirectional lead screw (17), and the ends of the mounting shafts one (5) are rotatably connected in the lifting blocks (18).

6. The intelligent production line equipment with a special-shaped square pipe as claimed in claim 5, wherein: A ball nut (19) is provided inside the lifting block (18). The ball nut (19) cooperates with the bidirectional lead screw (17). A second motor (20) connected to an external power supply is provided on the bearing plate (4) near the bottom. The second motor (20) cooperates with the bidirectional lead screw (17). A strain sensor (21) is provided on the side wall of each positioning roller (6) close to the bearing plate (4). The strain sensor (21) is connected to the second motor (20) through a controller.

7. The intelligent production line equipment for special-shaped square pipes as described in claim 1, characterized in that: The vertical cross-sectional profile of the mounting frame (7) is "concave". The quick-release assembly includes a mounting channel (22), a stepped hole (23), a limiting disc (24), a baffle (25) and a cover plate (26). The mounting channel (22) is opened on the opposite side walls of the left and right top plates of the mounting frame (7). The stepped hole (23) is vertically arranged at the other end of the mounting channel (22). The diameter of the second mounting shaft (8) matches the internal width of the mounting channel (22). The limiting disc (24) is fixedly connected to the top of the second mounting shaft (8). The limiting disc (24) cooperates with the stepped hole (23), and the diameter of the limiting disc (24) is larger than that of the second mounting shaft (8).

8. The intelligent production line equipment for special-shaped square pipes as claimed in claim 7, wherein: The baffle (25) is installed at the top plate of the mounting frame (7) near the left and right side walls. The cover plate (26) is movably connected between the two baffles (25). After the second mounting shaft (8) and the limiting disc (24) are placed into the stepped hole (23), the cover plate (26) covers the top of the stepped hole (23). A locking screw (27) is provided between the cover plate (26) and the mounting frame (7). A guiding block (28) is fixedly connected to the bottom of the second mounting shaft (8). A sliding block (29) is threadedly connected to the bottom of the guiding block (28). A guiding track (30) is provided at the inner bottom end of the mounting frame (7). The sliding block (29) is slidably installed on the guiding track (30).

9. The intelligent production line equipment for special-shaped square pipes according to claim 1, characterized in that: The positioning rollers (6) and the clamping rollers are spaced above the bottom plate (1). A placing frame (31) is provided on the top of the bottom plate (1). Three-dimensional laser detection lights (32) are provided on the opposite inner surfaces of the placing frame (31). A laser rangefinder (33) is provided on the top of the placing frame (31). The detection probe of the laser rangefinder (33) vertically faces downwards onto the square pipe after processing.

10. A method for intelligent production of special-shaped square pipes using any one of claims 1-9, comprising the following specific steps: S1: First, place the pipe to be processed on the conveying roller (3). The initial shape of the pipe to be processed is processed into a circular shape. The first motor (11) is started. The first motor (11) drives the connected conveying roller (3) to rotate. The other conveying rollers (3) are interconnected through the conveyor belt (10) to achieve rotation in the same direction together, driving the pipe to move in the processing direction. The clamping cylinder (15) is activated. The piston rod of the clamping cylinder (15) is connected to the positioning rod frame (13). The end of the positioning rod frame (13) is movably embedded in the rolling ball (14). By moving the piston rod forward, the rolling ball (14) rolls and fits with the clamping disc (12). The clamping disc (12) is movably connected to the conveyor roller (3), thereby driving the clamping disc (12) to move towards the pipe fitting on the conveyor roller (3), and finally fitting with the pipe fitting, ensuring that the position of the pipe fitting does not shift during transportation; S2: When the pipe fitting is conveyed out from the conveyor roller (3), it enters between the two bearing plates (4). There is a first mounting shaft (5) between the two bearing plates (4). The positioning roller (6) is fixedly connected to the first positioning shaft. The pipe fitting passes through between the upper and lower positioning rollers (6), so as to prevent the pipe fitting from moving during further processing. There is a strain sensor (21) on the positioning roller (6). The pressure applied to the pipe fitting can be detected through the strain sensor (21). When the detected pressure value is lower or higher than the preset pressure value, the controller drives the second motor (20) to start. The output shaft of the second motor (20) cooperates with the bidirectional lead screw (17), so as to drive the two lifting blocks (18) to approach or move away from each other through the ball nut (19), and adjust the distance between the upper and lower positioning rollers (6), improving the intelligent level of pipe fitting production. It can not only ensure the clamping degree of the pipe fitting, but also effectively avoid the situation of deformation caused by excessive applied pressure; S3: When it finishes positioning and comes out from the positioning roller (6), it immediately enters between the left and right forming rollers (9). The working surface of the forming roller (9) is provided with a forming groove matching the cross-sectional shape of the target special-shaped square pipe. The grooves of the two forming rollers (9) form a closed cavity. Thus, when the pipe fitting passes through between the two forming rollers (9), the forming roller (9) applies pressure to the pipe fitting to process it into a special-shaped square pipe. When processing special-shaped square pipes of different shapes, there are multiple types of forming rollers (9). Remove the cover plate (26) from the top of the mounting frame (7) to expose the stepped hole (23). Remove the screw between the guide block (28) and the sliding block (29), and the second mounting shaft (8) and the limit disc (24) can be lifted upward through the mounting channel (22), and the second mounting shaft (8) and the limit disc (24) can be taken out as a whole. Then install the corresponding forming roller (9) in the mounting frame (7) again. When wanting to process different special-shaped square pipes, it can be quickly disassembled and replaced, improving the processing efficiency; S4: After the special-shaped square pipe is processed, it will enter the placement frame (31). The three-dimensional laser detection lights (32) on both sides inside the placement frame (31) emit laser to detect the outer contour of the special-shaped pipe fitting, and send the detected data to an external device. By comparing with the tolerance of the standard model, a quality report is generated in real time, so that the error between the processed special-shaped square pipe and the standard model can be known, further improving the intelligent production level of the special-shaped square pipe. The set laser rangefinder (33) can also monitor the distance of the produced special-shaped square pipe, facilitating the next equidistant cutting of the special-shaped square pipe.

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