Automatic straightening, cutting, flaw detection and screening production device for metal coil pipe

Abstract

The automatic straightening, cutting, flaw detection and screening production device comprises a first machine table, a second machine table, a third machine table and a fourth machine table, a guide frame is arranged on the left side of the upper face of the first machine table, a guide roller is arranged in the guide frame, and a vertical straightening frame is arranged at the left end of the upper face of the second machine table; a plurality of straightening roller groups are arranged on the vertical straightening frame, a horizontal straightening frame is arranged at the right end of the second machine table, and a plurality of straightening roller groups are also arranged on the horizontal straightening frame; a dragging mechanism is arranged at the left end on the third machine table, a flaw detector is arranged in the middle on the third machine table, and a spray head is arranged at the right end on the third machine table; a cutting mechanism is arranged on the left side of the upper face of the fourth machine table, and a waste collecting mechanism is arranged on the right side of the upper face of the fourth machine table. The product provided by the invention has the benefits of straightening and cutting the roll material into the required calibrated length, reducing the material carrying, occupying a small field area and being high in intensification degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal pipe processing, in particular to a metal coil pipe automatic straightening, cutting, flaw detection screening and production device. BACKGROUND

[0002] In industrial production, steel pipes are common materials, especially in the industry of producing pressure pipes, gas or liquid conveying pipes, heat exchanger pipes and the like. The existing steel pipe processing method is to directly purchase straight pipes of a certain length and then cut them by electric saw. This will cause waste in handling, storage and material, and generate a large amount of noise, dust and material loss during cutting. In order to solve the problems of the prior art, there is an urgent need to design a metal coil pipe automatic straightening, cutting, flaw detection screening and production device. After searching, no similar technical documents have been found. SUMMARY

[0003] (I) Technical problems solved In order to solve the problems in the background art, the present application designs a metal coil pipe automatic straightening, cutting, flaw detection screening and production device, which aims to provide a device that can meet the needs of discharging pipe products of various specifications and realize automatic operation of straightening, flaw detection, marking, cutting and classification of steel pipes.

[0004] (II) Technical solutions In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: A metal coil pipe automatic straightening, cutting, flaw detection screening and production device, comprising: A discharging rack, on which a coil of steel pipe is arranged; A first machine table, the upper left side of which is provided with a guide frame, and a guide roller is arranged in the guide frame, which is used to preliminarily position the steel pipe moving through the guide frame; the upper right side of the first machine table is provided with a frequency converter, and a heater is arranged at the upper end of the frequency converter, which is used to straighten and eliminate internal stress of the steel pipe moving through the heater; A second machine table, the upper left end of which is provided with a vertical straightening frame, and a plurality of straightening roller groups are arranged on the vertical straightening frame, which is used to straighten the steel pipe in the vertical direction; the right end of the second machine table is provided with a horizontal straightening frame, and a plurality of straightening roller groups are also arranged on the horizontal straightening frame, which is used to straighten the steel pipe in the horizontal direction; A third machine table, the upper left end of which is provided with a dragging mechanism, which is used to drag and move the steel pipe; the upper middle part of the third machine table is provided with a flaw detector, which is used to detect and monitor the steel pipe; the upper right end of the third machine table is provided with a spray head, which is used to spray colored paint on the abnormal position of the steel pipe detected by the flaw detector. The fourth machine has a cutting mechanism on its upper left side, a waste collection mechanism on its right side, and a dust removal mechanism on its lower side. The dust removal mechanism is used to absorb and filter the smoke and dust pollution generated during cutting in a timely manner.

[0005] As a preferred embodiment of the previous step, the cutting mechanism includes a cutting box, in which a cutting frame and a vision detector are installed. The cutting frame is fixed on a fourth machine platform, and the vision detector is fixed on the inner wall of the cutting box. The cutting box has a through hole for the steel pipe to pass through, and the vision detector is used to identify the pattern marked on the steel pipe by the nozzle.

[0006] As a preferred embodiment of the previous step, the cutting frame is equipped with a second motor, bearings, and a rotating cylinder. The second motor is rotatably connected to the drive gear. The left end of the rotating cylinder rotates on the cutting frame via the bearing. A driven gear is provided in the middle of the rotating cylinder, which meshes with the drive gear for transmission. A cutting chamber is provided on the right side of the rotating cylinder, and a laser cutting head is provided inside the cutting chamber. The laser cutting head cuts the steel pipe inside the rotating cylinder as it rotates.

[0007] As a preferred embodiment of the previous step, the cutting box is equipped with a guide rail, and a sliding block is provided on the guide rail. A position detector is provided at the lower end of the sliding block. The position detector is set to a calibrated length. When the steel pipe reaches the calibrated length of the position detector, the laser cutting head is started to rotate and cut the steel pipe.

[0008] As a preferred embodiment of the previous step, the waste collection mechanism includes a waste platform for collecting marked and cut steel pipes. The waste platform is equipped with a first flipping bracket, a second flipping bracket, and a fourth motor frame. Roller frames are installed on both the first and second flipping brackets. Rollers are provided on both roller frames. A third motor is provided on the roller frames for driving the rollers to rotate. The rollers on the two roller frames form an angle and are used to support and move the steel pipes.

[0009] As a preferred embodiment of the previous step, both the first and second flip brackets are rotatably equipped with flip shafts, wherein one end of the flip shaft on the same side is fixedly connected to the corresponding roller frame, and the two flip shafts pass through the first and second flip brackets respectively and are then fixedly connected to the first and second rockers respectively. The first and second rockers, together with the connecting rod assembly and the drive connecting rod, constitute a double crank rocker mechanism.

[0010] As a preferred embodiment of the previous step, a fourth motor is installed on the fourth motor frame. The fourth motor is fixedly connected to the drive linkage. When the fourth motor drives the drive linkage to rotate counterclockwise, it opens the two roller frames through the linkage assembly, causing the steel pipes on them to fall off and reject defective products. When the fourth motor drives the drive linkage to rotate clockwise, it closes the two roller frames through the linkage assembly, causing the steel pipes to move on them.

[0011] As a preferred embodiment of the previous step, the dragging mechanism includes a chain assembly, several dragging rollers, and a first motor. The several dragging rollers are arranged in two rows. The first motor is rotatably connected to one of the dragging rollers. The multiple dragging rollers on the same side are connected by a chain assembly. When the first motor drives the dragging rollers to rotate, it is used to drag the steel pipe 2 between the two dragging rollers.

[0012] As a preferred embodiment of the previous step, a guide is also provided in front of the cutting box. The guide is installed on the top of the fourth machine platform and is used to ensure the stability of the steel pipe when cutting it.

[0013] As a preferred embodiment of the previous step, the dust removal mechanism includes: a dust removal box, a fan, and a suction pipe. The dust removal box is connected to the fan and the suction pipe. A dust removal bag is installed inside the dust removal box. The suction pipe passes through the upper part of the fourth machine platform and is connected to the cutting box.

[0014] As a preferred option in the previous step, the flaw detector is an ultrasonic flaw detector or an eddy current flaw detector structure.

[0015] As a preferred option in the previous step, in order to improve cutting efficiency, multiple laser cutting heads are provided on the rotating cylinder.

[0016] As a preferred solution in the previous step, in order to meet the production needs of steel pipes with multiple diameters, the radial movement adjustment of the laser cutting head on the rotating cylinder is provided, and the first and second flipping supports are configured as height-adjustable mechanisms.

[0017] (III) Beneficial Effects This invention provides an automated production device for straightening, cutting, flaw detection, and screening of metal coils, which has the following beneficial effects: 1. The advantages of this invention are that it straightens and cuts rolled materials into the required standard length, reduces material handling, occupies less space, and has a high degree of intensification.

[0018] 2. When processing coiled materials, the product of this invention can detect defects in steel pipes in real time, and mark and cut the defective areas, thus realizing the quality control principle of "no production, no acceptance, and no delivery of defective products".

[0019] 3. The product of this invention uses laser cutting of steel pipes, which is highly efficient, has low material loss and low dust. During the cutting process, it works in conjunction with a suction fan to remove dust in real time.

[0020] 4. The product of this invention can control the frequency converter to adjust the heating power of the heater in order to meet the processing requirements of steel pipes with different wall thicknesses and sizes. At the same time, when the steel pipe is being cut, the frequency converter can be changed to reduce the temperature of the heater to prevent the steel pipe from being overheated locally when it is not moving.

[0021] 5. The product of this invention avoids the accumulation of semi-finished materials and space occupation, has no complicated debugging process, can be produced at any time, which is conducive to the arrangement of production plans, realizes "zero inventory" production, and improves production efficiency and lean production effect.

[0022] 6. The production process of the product of this invention requires no manual operation, has a high degree of automation, the equipment has a simple structure, is easy to use, easy to process, manufacture and promote, and has a high cost performance, improving the accuracy, efficiency and quality of operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front view structure of an embodiment of the present invention; Figure 2 This is a top view of an embodiment of the present invention. Figure 3 This is a schematic diagram of the fourth machine station according to an embodiment of the present invention; Figure 4 For the present invention Figure 3 Enlarged section view of part M; Figure 5 For the present invention Figure 4 View from direction B; Figure 6 For the present invention Figure 3 A-direction view; Figure 7 This is a schematic diagram of the linkage mechanism after it is opened according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the linkage mechanism according to an embodiment of the present invention; Figure 9 This is a block diagram of the control system according to an embodiment of the present invention.

[0024] The components include: 1. Feeding rack; 2. Steel pipe; 3. Guide frame; 4. First machine platform; 5. Guide roller; 6. Heater; 7. Vertical straightening frame; 8. Straightening roller assembly; 9. Frequency converter; 10. Second machine platform; 11. Horizontal straightening frame; 12. Third machine platform; 13. Chain assembly; 14. Traction roller; 15. Flaw detector; 16. Nozzle; 17. First motor; 18. Flaw detector frame; 19. Nozzle frame; 20. Dust collection box; 21. Cutting box; 22. Cutting machine frame; 23. Suction pipe; 24. Dust collection bag; 25. Fan; 26. Fourth machine platform; 27. Guide rail; 28. ... 29. Three motors; 30. Roller frame; 31. Sliding block; 32. Linkage assembly; 33. Fourth motor; 34. Fourth motor frame; 35. First tilting bracket; 36. Roller; 37. Waste platform; 38. Through hole; 49. Second motor; 40. Drive gear; 41. Driven gear; 42. Rotating cylinder frame; 43. Laser cutting head; 44. Bearing; 45. Vision detector; 46. Cutting chamber; 47. Position detector; 48. Second rocker arm; 49. Tilting shaft; 50. Drive linkage; 51. Controller; 52. First rocker arm; 53. Guide. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0026] like Figure 1 , 2 As shown, the feeding rack 1 of this application is provided with a coiled steel pipe 2. The side of the feeding rack 1 of this application is roughly triangular in shape. The coiled steel pipe 2 is set on the upper end of the feeding rack 1 and can rotate on the feeding rack 1. A first machine base 4 is provided behind the feeding rack 1. A guide frame 3 is provided on the left side of the upper surface of the first machine base 4. Specifically, the guide frame 3 is fixed on the upper surface of the first machine base 4. A guide roller 5 is provided inside the guide frame 3. The guide roller 5 can perform preliminary positioning of the steel pipe 2 that moves through the guide frame 3.

[0027] A frequency converter 9 is provided on the right side of the upper surface of the first machine base 4 of this application. The upper end of the frequency converter 9 is a heater 6. The heater 6 adopts a high-frequency eddy current heating coil. After the steel pipe 2 moves through the heater 6 and is heated, it is easier to straighten and eliminate internal stress.

[0028] A second machine platform 10 is provided behind the first machine platform 4 of this application. A vertical straightening frame 7 is provided at the left end of the upper surface of the second machine platform 10. Specifically, the vertical straightening frame 7 is fixed to the upper surface of the second machine platform 10. Several straightening roller groups 8 are provided on the vertical straightening frame 7. The straightening roller groups 8 on the vertical straightening frame 7 are used to straighten the steel pipe 2 in the vertical direction. A horizontal straightening frame 11 is provided at the right end of the upper surface of the second machine platform 10. Specifically, the horizontal straightening frame 11 is fixed to the upper surface of the second machine platform 10. Several straightening roller groups 8 are also provided on the horizontal straightening frame 11. The straightening roller groups 8 on the horizontal straightening frame 11 are used to straighten the steel pipe 2 in the horizontal direction.

[0029] A third machine platform 12 is provided behind the second machine platform 10 of this application. A dragging mechanism is provided on the left end of the upper surface of the third machine platform 12. The dragging mechanism includes a chain assembly 13, dragging rollers 14, and a first motor 17. There are multiple dragging rollers 14, such as six, arranged in two rows. The first motor 17 is rotatably connected to one of the dragging rollers 14. The multiple dragging rollers 14 on the same side are connected by the chain assembly 13. When the first motor 17 drives the dragging rollers 14 to rotate, it can... The steel pipe 2 is dragged and moved between the two drag rollers 14; a flaw detector frame 18 is set in the middle of the upper surface of the third machine platform 12, and a flaw detector 15 is set on the flaw detector frame 18. The flaw detector 15 can perform flaw detection and monitoring on the steel pipe 2. The flaw detector 15 can select ultrasonic flaw detection or eddy current flaw detection and other processes; a nozzle frame 19 is set at the right end of the upper surface of the third machine platform 12, and a nozzle 16 is set on the nozzle frame 19. The nozzle 16 can spray colored paint markings at the abnormal positions of the steel pipe 2 detected by the flaw detector 15.

[0030] like Figures 1 to 5As shown, a fourth machine platform 26 is provided behind the third machine platform 12 of this application. A cutting mechanism is provided on the left side of the upper surface of the fourth machine platform 26, a waste collection mechanism is provided on the right side, and a dust removal mechanism is provided on the lower side of the fourth machine platform 26. The cutting mechanism includes a cutting box 21, which contains a cutting frame 22 and a vision detector 44. The cutting box 21 has a through hole 37, specifically, the through hole 37 is provided on the left and right sides of the cutting box 21. The cutting frame 22 is fixed on the fourth machine platform 26, and the vision detector 44 is fixed on the upper surface of the inner wall of the cutting box 21. The through hole 37 facilitates the passage of the steel pipe 2. To ensure the stability of the steel pipe 2 during cutting, a guide 53 is installed on the fourth machine platform 26 before the steel pipe 2 enters the cutting box 21. The vision detector 44 is used to identify the pattern marked on the steel pipe 2 by the nozzle 16. The cutting frame 22 is equipped with a second motor 38, a bearing 43, and a rotating cylinder 41. The second motor 38 is rotatably connected to a drive gear 39. The left end of the rotating cylinder 41 can rotate on the cutting frame 22 via the bearing 43. A driven gear 40 is located in the middle of the rotating cylinder 41, and the driven gear 40 meshes with the drive gear 39 for transmission. A laser cutting head 42 is installed in the cutting chamber 45 on the right side of the rotating cylinder 41. As the rotating cylinder 41 rotates, the laser cutting head 42 can cut the steel pipe 2 inside the rotating cylinder 41.

[0031] like Figure 3 , 6As shown in Figure -8, the cutting box 21 of this application is equipped with a guide rail 27, and the guide rail 27 has a movable sliding block 30. A position detector 46 is provided at the lower end of the sliding block 30. The position detector 46 is set to a calibrated length. When the steel pipe 2 reaches the calibrated length of the position detector 46, the laser cutting head 42 is started to rotate and cut the steel pipe 2. In order to improve the cutting efficiency, multiple laser cutting heads 42 can be set on the rotating cylinder 41 of this application. In order to meet the production needs of steel pipes 2 with multiple specifications of diameter, the laser cutting head 42 can be adjusted radially in the rotating cylinder 41. The waste collection mechanism of this application includes a waste platform 36, a first flipping bracket 34, and a fourth motor frame 33. The waste platform 36 can collect the marked and cut steel pipes 2. The waste platform 36 is equipped with a first flipping bracket 34, a second flipping bracket 48, and a fourth motor frame 33. Both the first flipping bracket 34 and the second flipping bracket 48 are connected to a roller frame 29, which is equipped with multiple rollers 35. The rollers 35 are preferably frustum-shaped. A third motor 28 is mounted on the roller frame 29, which drives the rollers 35 to rotate. The rollers 35 on both sides of the roller frame 29 form a certain angle, allowing them to support and move the steel pipe 2. The first flipping bracket 34 and the second flipping bracket 48 are rotatably equipped with flipping shafts 49. To meet the production needs of steel pipes 2 with multiple diameters, the first flipping bracket 34 and the second flipping bracket 48 are height-adjustable. One end of the flipping shaft 49 on the same side is fixedly connected to the roller frame 29. The two flipping shafts 49 pass through the first flipping bracket 34 and the second flipping bracket 48 respectively, and are then fixedly connected to the first rocker arm 52 and the second rocker arm 47 respectively. The first rocker arm 52, the second rocker arm 47, the connecting rod assembly 31, and the drive connecting rod 50 constitute a double-crank rocker mechanism. A fourth motor 32 is mounted on the fourth motor frame 33, and the fourth motor 32 is fixedly connected to the drive linkage 50. When the fourth motor 32 drives the drive linkage 50 to rotate counterclockwise, it opens the two roller frames 29 through the linkage assembly 31, causing the steel pipe 2 on them to fall off and reject defective products; when the fourth motor 32 drives the drive linkage 50 to rotate clockwise, it closes the two roller frames 29 through the linkage assembly 31, allowing the steel pipe 2 to move on them.

[0032] like Figure 3 As shown, the dust removal mechanism includes a dust removal box 20 and a suction fan 25. The dust removal box 20 is connected to the suction fan 25 and the suction pipe 23. A dust removal bag 24 is installed inside the dust removal box 20. The suction pipe 23 passes through the upper end of the fourth machine platform 26 and is connected to the cutting box 21. The dust removal box 20 can absorb and filter the smoke and dust pollution generated during cutting in a timely manner.

[0033] like Figure 9As shown, this application also includes a controller 51, which controls the operation of the frequency converter 9, flaw detector 15, nozzle 16, first motor 17, suction fan 25, third motor 28, fourth motor 32, second motor 38, laser cutting head 42, vision detector 44, position detector 46, etc.

[0034] Specifically, controller 51 controls the start of the first motor 17, which drives the drag rollers 14 to drag the steel pipe 2 from the feeding rack 1 into the guide frame 3, heater 6, vertical straightening frame 7, and horizontal straightening frame 11 in sequence, and then into the flaw detector frame 18 and nozzle frame 19. Controller 51 controls the start of the frequency converter 9 to adjust the heater 6 to heat the steel pipe 2 passing through it, so as to eliminate the internal stress of the steel pipe 2 and straighten it with the straightening roller group 8.

[0035] After the steel pipe 2 enters the flaw detector frame 18 and the nozzle frame 19, when the flaw detector 15 detects defects such as cracks and sand holes in the steel pipe 2, the controller 51 controls the nozzle 16 to delay and spray colored paint onto the surface of the steel pipe 2 to mark the defects.

[0036] As the steel pipe 2 continues to enter the cutting box 21, the vision detector 44 can detect the defects marked by the nozzle 16 on the steel pipe 2 and send the feedback to the controller 51. The controller 51 then starts the second motor 38 and the laser cutting head 42 to perform laser cutting. At the same time, the controller 51 starts the fourth motor 32 with a delay action to open the two sets of roller frames 29, and the defective pipe will fall onto the waste platform 36.

[0037] The controller 51 can control the frequency converter 9 to further adjust the heating power of the heater 6 to meet the processing requirements of steel pipes 2 with different wall thicknesses and sizes; at the same time, when the steel pipe 2 is being cut, the frequency converter 9 can be changed to reduce the temperature of the heater 6 to prevent the steel pipe 2 from being overheated locally when it is not moving.

[0038] During the processing, the controller 51 controls the suction fan 25 and the third motor 28 to work, which can remove smoke and dust and transfer the cut steel pipe 2 in real time.

[0039] During processing, if a defect is detected in the steel pipe 2, it will be detected by the position detector 46 when the steel pipe 2 reaches the specified length. The detection signal is fed back to the controller 51, and the controller 51 will then start the second motor 38 and the laser cutting head 42 to perform laser cutting. At this time, the fourth motor 32 does not operate, and the two sets of roller frames 29 are in a closed state. After cutting, the qualified steel pipe 2 is transferred away on the roller 35.

[0040] Specific implementation process: Controller 51 controls the start of the first motor 17, which drives the drag rollers 14 to pull the steel pipe 2 from the feeding rack 1 into the guide frame 3, heater 6, vertical straightening frame 7, and horizontal straightening frame 11 in sequence, and then into the flaw detector frame 18 and nozzle frame 19. Controller 51 controls the start of the frequency converter 9 to adjust the heater 6 to heat the steel pipe 2 passing through it, so as to eliminate the internal stress of the steel pipe 2 and straighten it with the straightening roller group 8.

[0041] After the steel pipe 2 enters the flaw detector frame 18 and the nozzle frame 19, when the flaw detector 15 detects defects such as cracks and sand holes in the steel pipe 2, the controller 51 controls the nozzle 16 to delay and spray colored paint onto the surface of the steel pipe 2 to mark the defects.

[0042] As the steel pipe 2 continues to enter the cutting box 21, the vision detector 44 can detect the defects marked by the nozzle 16 on the steel pipe 2 and feed them back to the controller 51. The controller 51 then starts the second motor 38 and the laser cutting head 42 to perform laser cutting. At the same time, the controller 51 starts the fourth motor 32 to delay the action and open the two sets of roller frames 29. The defective pipe will fall onto the waste platform 36.

[0043] The controller 51 can control the frequency converter 9 to further adjust the heating power of the heater 6 to meet the processing requirements of steel pipes 2 with different wall thicknesses and sizes; at the same time, when the steel pipe 2 is being cut, the frequency converter 9 can be changed to reduce the temperature of the heater 6 to prevent the steel pipe 2 from being overheated locally when it is not moving.

[0044] During the processing, the controller 51 controls the suction fan 25 and the third motor 28 to work, which can remove smoke and dust and transfer the cut steel pipe 2 in real time.

[0045] During processing, if a defect is detected in the steel pipe 2, it will be detected by the position detector 46 when the steel pipe 2 reaches the specified length. The detection signal is fed back to the controller 51, and the controller 51 will then start the second motor 38 and the laser cutting head 42 to perform laser cutting. At this time, the fourth motor 32 does not operate, and the two sets of roller frames 29 are in a closed state. After cutting, the qualified steel pipe 2 is transferred away on the roller 35.

[0046] The above achieves the design objective.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0048] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents. In summary, this application achieves its intended purpose.

Claims

1. A metal coil pipe automatic straightening, cutting, flaw detection screening production device, characterized in that, It includes: Put the rack (1), the rack (1) is provided with a coil of steel pipe (2); The first machine (4), the upper left side of the first machine (4) is provided with a guide frame (3), the guide frame (3) is provided with a guide roller (5), the guide roller (5) is used for the initial positioning of the steel pipe (2) moving through the guide frame (3), the upper right side of the first machine (4) is provided with a frequency converter (9), the upper end of the frequency converter (9) is provided with a heater (6), the heater (6) is used for straightening and eliminating internal stress of the steel pipe (2) moving through the heater (6); The second machine (10), the left end of the upper surface of the second machine (10) is provided with a vertical straightening frame (7), a plurality of straightening roller groups (8) are arranged on the vertical straightening frame (7), the vertical straightening frame (7) is used for vertical straightening of the steel pipe (2), the right end of the second machine (10) is provided with a horizontal straightening frame (11), a plurality of straightening roller groups (8) are also arranged on the horizontal straightening frame (11), the horizontal straightening frame (11) is used for horizontal straightening of the steel pipe (2); The third machine (12), the left end of the upper surface of the third machine (12) is provided with a dragging mechanism, the dragging mechanism is used for dragging movement of the steel pipe (2), the middle part of the upper surface of the third machine (12) is provided with a flaw detector (15), the flaw detector (15) is used for flaw detection monitoring of the steel pipe (2), the right end of the upper surface of the third machine (12) is provided with a spray head (16), the spray head (16) is used for spraying colored paint marks at the abnormal position of the steel pipe (2) detected by the flaw detector (15); The fourth machine (26), the left side of the upper surface of the fourth machine (26) is provided with a cutting mechanism, the right side is provided with a waste collecting mechanism, the lower side of the fourth machine (26) is provided with a dust removal mechanism, the dust removal mechanism is used for timely absorption and filtration of smoke dust pollution generated by cutting.

2. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 1, characterized in that, The dragging mechanism includes a chain set (13), a plurality of dragging rollers (14) and a first motor (17), the plurality of dragging rollers (14) are arranged in a two-row structure, the first motor (17) is rotationally linked with one of the dragging rollers (14), a plurality of dragging rollers (14) on the same side are transmissionally linked through the chain set (13), when the first motor (17) drives the dragging rollers (14) to rotate, the steel pipe (2) between the two dragging rollers (14) is dragged to move.

3. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 1, characterized in that, The cutting mechanism includes a cutting box (21), the cutting box (21) is provided with a cutting rack (22) and a visual detector (44), the cutting rack (22) is fixed on the fourth machine (26), the visual detector (44) is fixed on the inner wall of the cutting box (21), the cutting box (21) is provided with a through hole (37) penetrating through, the through hole (37) is used for passing the steel pipe (2), the visual detector (44) is used for identifying the marking pattern on the steel pipe (2) marked by the spray head (16).

4. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 3, characterized in that, The cutting frame (22) is provided with a second motor (38), a bearing (43) and a rotating cylinder frame (41). The second motor (38) is rotationally connected with a driving gear (39). The rotating cylinder frame (41) is rotationally connected with the cutting frame (22) through the bearing (43) at the left end. A driven gear (40) is arranged in the middle of the rotating cylinder frame (41). The driven gear (40) is in meshing transmission with the driving gear (39). A cutting chamber (45) is arranged at the right side of the rotating cylinder frame (41). A laser cutting head (42) is arranged in the cutting chamber (45). The laser cutting head (42) rotates with the rotating cylinder frame (41) to cut the steel pipe (2) in the rotating cylinder frame (41).

5. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 3, characterized in that, The cutting box (21) is provided with a guide rail (27). A sliding block (30) is slidingly connected with the guide rail (27). A position detector (46) is arranged at the lower end of the sliding block (30). The position detector (46) is set to a designated length. When the steel pipe (2) reaches the designated length of the position detector (46), the laser cutting head (42) is started to rotate and cut the steel pipe (2).

6. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 3, characterized in that, The cutting box (21) is further provided with a guider (53). The guider (53) is arranged on the fourth machine table (26). The guider (53) is used to ensure the stability of the steel pipe (2) during cutting.

7. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 1, characterized in that, The waste collecting mechanism includes a waste platform (36) for collecting the marked cut steel pipe (2). The waste platform (36) is provided with a first turnover support (34), a second turnover support (48) and a fourth motor frame (33). The first turnover support (34) and the second turnover support (48) are both provided with a roller frame (29). The roller frames (29) are both provided with rollers (35). The roller frames (29) are provided with a third motor (28) for driving the rollers (35) to rotate. The rollers (35) on the two roller frames (29) form an included angle and are used to carry and move the steel pipe (2).

8. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 7, characterized in that, The first turnover support (34) and the second turnover support (48) are both rotationally provided with a turnover shaft (49). One end of the turnover shaft (49) on the same side is fixedly connected with the corresponding roller frame (29). The two turnover shafts (49) pass through the first turnover support (34) and the second turnover support (48) respectively and are fixedly connected with a first rocker (52) and a second rocker (47) respectively. The first rocker (52) and the second rocker (47) constitute a double-crank rocker mechanism with a connecting rod assembly (31) and a driving connecting rod (50).

9. The metal coil pipe automatic straightening, cutting, and flaw detection screening production device according to claim 7, characterized in that, The fourth motor (32) is arranged on the fourth motor frame (33), and the fourth motor (32) is fixedly connected with the driving connecting rod (50); when the fourth motor (32) drives the driving connecting rod (50) to rotate counterclockwise, the two roller frames (29) are driven to open through the connecting rod assembly (31), the steel pipe (2) on the roller frame (29) falls and the defective product is removed; when the fourth motor (32) drives the driving connecting rod (50) to rotate clockwise, the two roller frames (29) are driven to close through the connecting rod assembly (31), and the steel pipe (2) moves on the roller frame (29).

10. The metal coil pipe automatic straightening, cutting, flaw detection screening and producing device according to claim 1, characterized in that, The dust removal mechanism comprises a dust removal box (20), a suction fan (25) and a dust suction pipe (23), the dust removal box (20) is communicated with the suction fan (25) and the dust suction pipe (23), dust removal bags (24) are arranged in the dust removal box (20), and the dust suction pipe (23) is communicated with the cutting box (21) after penetrating through the upper end of the fourth machine table (26).

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