CN210588120U

CN210588120U - Automatic production system for large-diameter steel pipe

Info

Publication number: CN210588120U
Application number: CN201920790166.6U
Authority: CN
Inventors: 胡肖建; 黄运祥
Original assignee: Foshan Longchong Metal Products Co ltd
Current assignee: Foshan Longchong Metal Products Co ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-05-22
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a heavy-calibre steel pipe automatic production system, including material loading unwinding mechanism, flat compression roller module, side compression roller module, fold the module, welding set and grinding device, correct forming mechanism and PLC controlling means, material loading unwinding mechanism, flat compression roller module, side compression roller module, fold the module, welding set and grinding device and correct forming mechanism meet in proper order and synchronous operation, PLC controlling means and material loading unwinding mechanism, welding set, grinding device electric connection and control its work of mutually supporting. The utility model discloses a heavy-calibre steel pipe automatic production system shaping is fast, can make diversified cross-sectional form to adapt to service condition's needs. The product molding precision is high, the degree of automation is high, the yield is high, and the production efficiency is high.

Description

Automatic production system for large-diameter steel pipe

Technical Field

The utility model relates to a pipeline production field, in particular to heavy-calibre steel pipe automatic production system.

Background

The processing technology of the stainless steel profile mainly comprises two processing technologies, namely hot rolling and cold rolling. Different processing techniques have a great influence on the structure and properties of the stainless steel profile.

The disadvantages of the hot rolling process: after hot rolling, the non-metallic inclusions in the stainless steel profiled bar are pressed into sheets, and the layering phenomenon occurs, so that the performance of the stainless steel profiled bar which is pulled in the thickness direction is reduced due to the layering. Residual stresses caused by uneven cooling may also have adverse effects on deformation, stability, fatigue resistance, etc.

The defects of the traditional cold rolling are as follows: the traditional cold rolling process can only produce steel pipes with small calibers, and has the following defects in the production of steel pipes with large calibers; 1. the raw material steel belt adopted by the large-diameter steel pipe is wide and thick, the weight of a steel belt coil is large (one coil of raw material weighs 20 tons), and a common feeding device cannot bear the weight, so that effective discharging cannot be carried out; 2. the width of the steel belt is large, the stress of each part of the steel belt is difficult to control in the process of pressing the steel belt into a tubular shape, and the accumulated error is large, so that the final shape of the pipe is difficult to control, and the product in the final shape is difficult to obtain or the qualification rate is low; 3. when the traditional cold rolling pipe is rolled, the running speeds of all parts of the equipment are difficult to control to be consistent, and the surface of the pipe is scratched due to the speed difference, so that the product quality is influenced; 4. the traditional process has low automation degree, the transverse and longitudinal positions of the roller and each device part are basically manually adjusted, and the production efficiency is low; 5. the heavy-caliber steel pipe is heavy, when a long steel pipe is produced, one end of the steel pipe is settled by gravity, so that the other end of the steel pipe is seriously settled when the steel pipe is cut off and a workpiece is taken out, the whole steel pipe is deformed, the cut is uneven, secondary cutting is needed, raw materials are seriously wasted, and the production efficiency is low; when cutting off the blanking, the steel pipe may fall down to damage the surface, even deform due to the huge gravity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a product shaping precision is high, degree of automation is high, output is high, the high heavy-calibre steel pipe automatic production system of production efficiency.

According to the utility model discloses an aspect provides heavy-calibre steel pipe automatic production system, including material loading unwinding mechanism, flat compression roller module, side compression roller module, fold the module, welding set and grinding device, correct forming mechanism and PLC controlling means, material loading unwinding mechanism, flat compression roller module, side compression roller module, fold the module, welding set and grinding device and correct forming mechanism and meet in proper order and synchronous operation, PLC controlling means and material loading unwinding mechanism, welding set, grinding device electric connection and control its work of mutually supporting.

In some embodiments, the feeding unwinding mechanism comprises a base, a sliding seat, a first hydraulic cylinder, a second hydraulic cylinder and an expansion device, the first hydraulic cylinder is fixedly connected with the base, the sliding seat is connected with the base in a sliding manner, the free end of the first hydraulic cylinder is fixedly connected with the sliding seat and can drive the sliding seat to move horizontally, the second hydraulic cylinder is fixed on the sliding seat, and the free end of the second hydraulic cylinder is fixedly connected with the expansion device.

In some embodiments, the flat press roll module comprises a power motor, a gearbox, a synchronous transmission shaft group, a universal shaft and a flat roll shaft, wherein the output end of the power motor is connected with the input end of the gearbox, the output end of the gearbox is connected with one end of the synchronous transmission shaft group, one end of the universal shaft is connected with the synchronous transmission shaft group, the other end of the universal shaft is connected with the flat roll shaft, and the universal shaft and the flat roll shaft are arranged in a one-to-one correspondence mode to form a plurality of flat roll shafts.

In some embodiments, the device further comprises a synchronous cutting mechanism and a blanking mechanism, wherein the input end of the synchronous cutting mechanism is connected with the output end of the correction and shaping mechanism, and the input end of the blanking mechanism is connected with the output end of the synchronous cutting mechanism.

In some embodiments, the synchronous cutting mechanism includes a frame, a guide rail, a mounting seat, a power transmission device, a chain wheel and a lifting cutting device, wherein the guide rail is fixed on the upper side of the frame, the lower side of the mounting seat is provided with a roller wheel, the roller wheel is matched with the guide rail, the chain is fixed on the lower side of the mounting seat, the lifting cutting device is fixed on the upper side of the mounting seat, the power transmission device is connected with the chain wheel and can drive the chain wheel to rotate, the chain wheel is matched with the chain, the guide rails are two and are arranged in parallel, and the chain is located between the two guide.

In some embodiments, the lifting cutting device includes a first cylinder, a rotating support mounting seat, a sleeve, a cutting power shaft, a cutting saw blade and a cutting power device, one end of the first cylinder is hinged to the mounting seat, the other end of the first cylinder is hinged to the sleeve, the rotating support mounting seat is fixedly connected to the mounting seat, one end of the rotating support is hinged to the rotating support mounting seat, the other end of the rotating support is fixedly connected to the sleeve, the cutting power shaft penetrates through the sleeve, the cutting saw blade is fixed to one end of the cutting power shaft, and the cutting power device is connected to the other end of the cutting power shaft and can drive the cutting power shaft to rotate.

In some embodiments, the unloading mechanism comprises an unloading rack, a material receiving roller group, an unloading cylinder, an unloading stay bar and a storage rack, wherein the material receiving roller group and the unloading cylinder are both fixed on the unloading rack, the storage rack is positioned on one side of the unloading rack, the unloading cylinder is vertically arranged, one end of the unloading stay bar is hinged to one side of the unloading rack, and the other end of the unloading stay bar is hinged to the free end of the unloading cylinder.

The utility model has the advantages that: 1. a large hydraulic expansion feeding device and a steel belt tension control device are adopted, so that steel belt coils with the weight of 20 tons can be supported, and raw materials can be smoothly discharged and fed; 2. a synchronous transmission control device is adopted to ensure that all the compression roller shafts synchronously roll, so that the surface of the steel belt is prevented from being damaged by pulling; 3. an automatic control system is adopted to automatically adjust the devices of all parts in the whole production system in the transverse and longitudinal directions; 4. by adopting the transverse, longitudinal and circumferential correction and adjustment devices, the product steel pipe has high precision and high consistency of the shape and the shape of a target product, and products with various section shapes can be obtained by replacing the correction die; 5. the on-line synchronous cutting device and the blanking lifting device are matched, so that the work of cutting off, discharging and blanking can be finished without pause in the production process of the large-diameter steel pipe, the production efficiency is high, the steel pipe cannot be deformed due to gravity settlement, secondary cutting is avoided, and time and materials are saved. The production system can produce large-caliber (480 MM-caliber steel pipes), is high in forming speed, and can be made into various cross section forms to meet the requirements of use conditions. The product molding precision is high, the degree of automation is high, the yield is high, and the production efficiency is high.

Drawings

Fig. 1 is a schematic structural view of an automatic production system for large-diameter steel pipes according to an embodiment of the present invention;

fig. 2 is a schematic top view structural diagram of a feeding and unwinding mechanism of the automatic large-caliber steel pipe production system shown in fig. 1;

fig. 3 is a schematic front view structure diagram of the feeding and unwinding mechanism shown in fig. 2;

FIG. 4 is a schematic structural diagram of a flat press roll module of the automatic production system for large-caliber steel pipes shown in FIG. 1;

FIG. 5 is a schematic structural diagram of a synchronous cutting mechanism of the automatic large-caliber steel pipe production system shown in FIG. 1;

FIG. 6 is a schematic top view of the synchronous cutting mechanism shown in FIG. 5;

fig. 7 is a schematic structural diagram of a blanking mechanism of the automatic large-caliber steel pipe production system shown in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 to 7 schematically show an automatic production system for a large-diameter steel pipe according to an embodiment of the present invention.

Referring to fig. 1, the automatic production system for large-diameter steel pipes comprises a feeding and unwinding mechanism 1, a flat press roll module 2, a side press roll module 3, a folding module 4, a welding device 5, a polishing device 6, a correcting and shaping mechanism 7, a synchronous cutting mechanism 8, a discharging mechanism 9 and a PLC (programmable logic controller) control device. The feeding unwinding mechanism 1, the flat compression roller module 2, the side compression roller module 3, the folding module 4, the welding device 5, the polishing device 6 and the correction shaping mechanism 7 are sequentially connected and synchronously run, and the PLC control device is electrically connected with the feeding unwinding mechanism 1, the welding device 5 and the polishing device 6 and controls the feeding unwinding mechanism, the welding device 5 and the polishing device 6 to be matched with each other.

Referring to fig. 2 and 3, the feeding and unwinding mechanism 1 includes a base 11, a slide 12, a first hydraulic cylinder 13, a second hydraulic cylinder 14, an expansion device 15, a tension control mechanism 16, an unwinding guide device 17, an unwinding drive device 18, and a trolley rail device 19.

The first hydraulic cylinder 13 is fixed on the base 11, the sliding seat 12 is installed on the upper side of the base 11 and is connected with the base 11 in a sliding mode, a sliding groove is formed in the base 11, and two sides of the sliding seat 12 are installed in the sliding groove and can move along the sliding groove. The free end of the first hydraulic cylinder 13 is fixedly connected with the sliding base 12 and can drive the sliding base 12 to move horizontally. The second hydraulic cylinder 14 is fixed on the sliding base 12, and the free end of the second hydraulic cylinder 14 is fixedly connected with the expansion mechanism 15 and can drive the expansion mechanism 15 to move horizontally.

The expanding mechanism 15 includes a bearing support shaft 151, a bearing mount 152 and a conical clamp seat 153. The bearing support shaft 151 is fixedly connected with the free end of the second hydraulic cylinder 14, and the bearing mounting seat 152 is sleeved outside the bearing support shaft 151 and is rotatably connected with the bearing support shaft 151. One end of the conical clamping seat 153 is fixedly sleeved outside the bearing mounting seat 152, and the other end of the conical clamping seat 153 is gradually contracted to be conical. The tapered bevel connection design, the front end mouth footpath is little, and the rear end is big, respectively sets up a toper tight device that expands in steel band book both sides, is provided power by second pneumatic cylinder 14, and flexible removal around can, during the installation steel band, the front end of the tight device that expands of both sides toper stretches into steel band book centre bore, stretches into when conical bore is the same with the steel band aperture, props tight steel band book.

The base 11, the sliding seat 12, the first hydraulic cylinder 13, the second hydraulic cylinder 14 and the expansion mechanism 15 are arranged in pairs and are respectively positioned at two sides of the trolley track device 19, and the two expansion mechanisms 5 can relatively clamp and can relatively clamp a steel coil. The tension control mechanism 16, the unwinding guide device 17 and the unwinding drive device 18 are sequentially arranged and connected to the output end of the trolley track device 19.

The tension control mechanism 16 includes a frame 161, a tension bracket 162, an upper support cylinder 163, a tension adjustment cylinder 164, a motor 165, a drive wheel 166, a mating guide strut 167, a lower support cylinder 168, a telescopic guide cylinder 169, and a guide plate 160. One end of the tension bracket 162 is hinged to the frame 161, one end of the upper support cylinder 163 is hinged to the frame 161, the other end of the upper support cylinder 163 is hinged to the middle of the tension bracket 162, and the upper support cylinder 163 is located on the upper side of the tension bracket 162. The motor 165 and the driving wheel 166 are both mounted at the other end of the tension bracket 162, and the output end of the motor 165 is connected with the driving wheel 166 and can drive the driving wheel 166 to rotate. In use, the driving wheel 166 presses the upper side of the steel strip coil, and the motor 165 drives the steel strip coil to rotate so as to drive the steel strip coil to unwind. The lower support cylinder 168 can drive the other end of the tension bracket 162 to move up and down by stretching and retracting, and according to the diameter change of the steel coil in the unreeling process, the lower support cylinder 168 supports the tension bracket 162 so that the driving wheel 166 always presses on the surface of the steel coil.

One end of the matching guide supporting rod 167 is hinged with the frame 161, one end of the lower supporting cylinder 168 is hinged with the frame 161, and the other end of the lower supporting cylinder 168 is hinged with the middle part of the matching guide supporting rod 167. The lower support cylinder 168 is located at the lower side of the guide strut 167. The telescopic guide cylinder 169 is fixedly connected with the matching guide support bar 167, and the guide plate 160 is fixedly connected with the free end of the telescopic guide cylinder 169. The lower support cylinder 168 is changed according to the diameter of the steel strip coil in the unreeling process, and the lower support cylinder 168 can stretch and contract to be matched with the other end of the guide support rod 167 to rotate so as to adjust the height of the guide plate 160. The free end of the tension adjusting cylinder 164 is provided with a tension adjusting wheel 1641, and the tension adjusting wheel 1641 is opposite to the guide plate 160 and can be matched with the guide plate to adjust the tension of the unreeling steel strip.

The unwinding driving device 18 includes a transmission motor 181, a linkage 182, an upper driving roller 183, a lower driving roller 184, an upper guide roller 185, and a lower guide roller 186. The transmission motor 181 is connected with the linkage 182 and can drive the linkage 182 to rotate, and the upper driving roller 183, the lower driving roller 184, the upper guide roller 185 and the lower guide roller 186 are respectively connected with the linkage 182 and can synchronously run. The linkage 182 may be a plurality of gears of the same diameter that intermesh. The upper driving roller 183 and the lower driving roller 184 are disposed opposite to each other in the vertical direction, and the upper guide roller 185 and the lower guide roller 186 are alternately disposed in the vertical direction. The transmission motor 181 rotates to drive the upper driving roller 183, the lower driving roller 184, the upper guide roller 185 and the lower guide roller 186 to synchronously operate, and can drive the steel belt passing through the upper driving roller 183, the lower driving roller 184, the upper guide roller 185 and the lower guide roller 186 to unreel.

Referring to fig. 4, the flat press roll module 2 includes a power motor 21, a gear box 22, a synchronous transmission shaft group 23, a cardan shaft 24, a flat roll shaft 25 and a flat press roll 26. The output end of the power motor 21 is connected with the input end of the gearbox 22, and the output end of the gearbox 22 is connected with one end of the synchronous transmission shaft group 23. One end of the cardan shaft 24 is connected to the synchronous drive shaft group 23, and the other end of the cardan shaft 24 is connected to the flat roll shaft 25. The universal shafts 24 and the flat roller shafts 25 are correspondingly arranged into 3-5 groups one by one. The synchronous transmission shaft group 23 includes a plurality of longitudinal power transmission shafts 231 and transverse power transmission cases 232 which are sequentially connected in a staggered manner, and the transverse power transmission cases 232 are connected with the universal shafts 24 in a one-to-one correspondence manner. The transverse power transmission case 232 converts the longitudinal transmission force into the transverse transmission force. The flat pressing roll 26 is sleeved outside the flat roll shaft 25 and fixedly connected with the flat roll shaft 25, the flat pressing roll 26 comprises an upper flat pressing roll and a lower flat pressing roll which are matched with each other, the middle part of the upper flat pressing roll protrudes, the middle part of the lower flat pressing roll is recessed, a steel plate penetrates between the upper flat pressing roll and the lower flat pressing roll, the radians of the upper flat pressing roll and the lower flat pressing roll are sequentially changed, the steel plate is gradually pressed into an arc shape, and the two sides of the steel plate are bent upwards.

The side compression roller module 3 is composed of 3-4 sets of vertically arranged roller dies 31 in one-to-one correspondence, the middle parts of the roller dies 31 are concave, an arc-shaped steel plate penetrates between the two roller dies 31, steel precipitation is pressed from two sides, and the radians of two sides of the steel plate are gradually upwards and inwards folded.

The folding module 4 is similar to the flat press roll module 2 in structure, but the upper flat press roll and the lower flat press roll are both of a structure with a concave middle part, so that two sides of a steel plate passing through the folding module are folded, and the folded part is pressed to be flat to match with a subsequent welding process.

The welding device 5 adopts a full-automatic welding machine capable of continuously conveying welding flux. The welding device 3 welds the openings of the semi-open stainless steel plate to form a closed stainless steel special-shaped pipe.

Grinding device 6 can set up to 2 ~ 3, can carry out all directions to the weld and polish, can make and polish more evenly. The grinding device 6 adopts the motor to drive the liftable grinding head to carry out grinding work, can automatically control the grinding size deviation and avoid the phenomenon of excessive grinding or insufficient grinding.

The correcting and shaping mechanism 7 comprises a longitudinal correcting press roll set 71 and a transverse correcting press roll set 72, the longitudinal correcting press roll set 71 is similar to the folding module 4 in structure, the transverse correcting press roll set 72 is similar to the side press roll module 3 in structure, and longitudinal and transverse size correction can be carried out on the welded and formed steel pipe.

Referring to fig. 5 and 6, the input end of the synchronous cutting mechanism 8 is connected with the output end of the straightening and shaping mechanism 7, and the input end of the blanking mechanism 9 is connected with the output end of the synchronous cutting mechanism 8.

The synchronous cutting mechanism 8 includes a frame 81, a guide rail 82, a mounting seat 83, a power transmission 84, a chain 85, a sprocket 86, and a lifting and lowering cutting device 87. The guide rail 82 is fixed on the upper side of the frame 81, and the lower side of the mounting seat 83 is provided with a roller 831, and the roller 831 is matched with the guide rail 82. The chain 85 is fixed to the lower side of the mounting seat 83, and the elevation cutting device 87 is fixed to the upper side of the mounting seat 83. The power transmission 84 is connected to a sprocket 86 and can drive the sprocket 86 to rotate, and the sprocket 86 is engaged with the chain 85. The guide rails 82 are two and parallel, and the chain 85 is located between the two guide rails 82 and parallel to the guide rails 82.

A guide rod 811 parallel to the guide rail 82 is provided at one side of the frame 81, and a connecting rod 831 is fixedly provided at one side of the mounting seat 83. One end of the connecting rod 831 is fixedly connected with a guide sleeve 832, and the guide sleeve 832 is sleeved outside the guide rod 811 and is connected with the guide rod 811 in a sliding manner. When the mounting seat 83 moves along the guide rail 82, the guide sleeve 832 moves along the guide rod 811, which can limit the mounting seat 83 and ensure the stability of the mounting seat 83 during the movement.

The power transmission 84 includes a first motor 841, a gearbox 842, and a cardan shaft 843. The output end of the first motor 841 is connected with the input end of the gearbox 842, the output end of the gearbox 842 is connected with one end of the cardan shaft 843, and the other end of the cardan shaft 843 is connected with the chain wheel 86. The rotation generated by the first motor 841 is transmitted to the cardan shaft 843 through the gear box 842, and the cardan shaft 843 rotates to rotate the sprocket 86.

The lifting and lowering cutting device 87 comprises a first cylinder 871, a rotating bracket 872, a rotating bracket mounting seat 873, a sleeve 874, a cutting power shaft 875, a cutting saw blade 876 and a cutting power device 877. One end of the first cylinder 871 is hinged with the mounting seat 83, and the other end of the first cylinder 871 is hinged with the sleeve 874. The rotating bracket mounting seat 873 is fixedly connected with the mounting seat 83, one end of the rotating bracket 872 is hinged with the rotating bracket mounting seat 873, and the other end of the rotating bracket 872 is fixedly connected with the sleeve 874. The cutting power shaft 875 penetrates through the sleeve 874, the cutting saw blade 876 is fixed at one end of the cutting power shaft 875, and the cutting power device 877 is connected with the other end of the cutting power shaft 875 and can drive the cutting power shaft 875 to rotate.

Referring to fig. 7, the blanking mechanism 9 includes a blanking frame 91, a material receiving roller set 92, a discharging cylinder 93, a discharging support rod 94 and a storage rack 95, the material receiving roller set 92 and the discharging cylinder 93 are both fixed on the blanking frame 91, the storage rack 95 is located on one side of the blanking frame 91, the discharging cylinder 93 is vertically arranged, one end of the discharging support rod 94 is hinged to one side of the blanking frame 91, and the other end of the discharging support rod 94 is hinged to the free end of the discharging cylinder 93.

The whole production system adopts the linkage control of the PLC control device, so that the matching work of all procedures can be ensured, and the automation of the production process is realized.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. Heavy-calibre steel pipe automatic production system, its characterized in that: including material loading unwinding mechanism (1), flat compression roller module (2), side compression roller module (3), fold module (4), welding set (5) and grinding device (6), correct forming mechanism (7) and PLC controlling means, material loading unwinding mechanism (1), flat compression roller module (2), side compression roller module (3), fold module (4), welding set (5) and grinding device (6) and correct forming mechanism (7) and meet in proper order and synchronous operation, PLC controlling means and material loading unwinding mechanism (1), welding set (5), grinding device (6) electric connection and control its work of mutually supporting.

2. The automatic production system of large-caliber steel pipes according to claim 1, characterized in that: material loading unwinding mechanism (1) includes base (11), slide (12), first pneumatic cylinder (13), second pneumatic cylinder (14) and bloated tight device (15), first pneumatic cylinder (13) and base (11) fixed connection, slide (12) and base (11) sliding connection, the free end and slide (12) fixed connection of first pneumatic cylinder (13) can drive slide (12) horizontal migration, second pneumatic cylinder (14) are fixed in slide (12), the free end and the bloated tight device (15) fixed connection of second pneumatic cylinder (14).

3. The automatic production system of large-caliber steel pipes according to claim 2, characterized in that: the flat compression roller module (2) comprises a power motor (21), a gearbox (22), a synchronous transmission shaft group (23), a universal shaft (24) and a flat roller shaft (25), the output end of the power motor (21) is connected with the input end of the gearbox (22), the output end of the gearbox (22) is connected with one end of the synchronous transmission shaft group (23), one end of the universal shaft (24) is connected with the synchronous transmission shaft group (23), the other end of the universal shaft (24) is connected with the flat roller shaft (25), and the universal shaft (24) and the flat roller shaft (25) are in one-to-one correspondence to be a plurality of.

4. The automatic production system of a large-caliber steel pipe according to claim 1, 2 or 3, characterized in that: the automatic feeding device is characterized by further comprising a synchronous cutting mechanism (8) and a blanking mechanism (9), wherein the input end of the synchronous cutting mechanism (8) is connected with the output end of the correction shaping mechanism (7), and the input end of the blanking mechanism (9) is connected with the output end of the synchronous cutting mechanism (8).

5. The automatic production system of large-caliber steel pipes according to claim 4, characterized in that: synchronous cutting mechanism (8) include frame (81), guide rail (82), mount pad (83), power transmission (84), chain (85), sprocket (86) and lift cutting device (87), guide rail (82) are fixed in the upside of frame (81), the downside of mount pad (83) is equipped with gyro wheel (831), gyro wheel (831) and guide rail (82) cooperation, the downside of mount pad (83) is fixed in chain (85), the upside of mount pad (83) is fixed in lift cutting device (87), power transmission (84) are connected and can drive sprocket (86) to rotate with sprocket (86), sprocket (86) and chain (85) cooperation, guide rail (82) are two and are parallel arrangement, chain (85) are located between two guide rails (82) and are parallel with guide rail (82).

6. The automatic production system of large-caliber steel pipes according to claim 5, characterized in that: the lifting cutting device (87) comprises a first air cylinder (871), a rotating bracket (872), a rotating bracket mounting seat (873), a sleeve (874), a cutting power shaft (875), a cutting saw blade (876) and a cutting power device (877), one end of the first air cylinder (871) is hinged with the mounting seat (83), the other end of the first air cylinder (871) is hinged with the sleeve (874), the rotating bracket mounting seat (873) is fixedly connected with the mounting seat (83), one end of the rotating bracket (872) is hinged with the rotating bracket mounting seat (873), the other end of the rotating bracket (872) is fixedly connected with a sleeve (874), the cutting power shaft (875) penetrates through the sleeve (874), the cutting saw blade (876) is fixed at one end of the cutting power shaft (875), and the cutting power device (877) is connected with the other end of the cutting power shaft (875) and can drive the cutting power shaft (875) to rotate.

7. The automatic production system of large-caliber steel pipes according to claim 4, characterized in that: unloading mechanism (9) are including unloading frame (91), connect material roller group (92), unload cylinder (93), vaulting pole (94) and storage rack (95) of unloading, connect material roller group (92) and unload cylinder (93) and all be fixed in unloading frame (91), storage rack (95) are located one side of unloading frame (91), the vertical setting of cylinder (93) of unloading, the one end of unloading vaulting pole (94) is articulated with one side of unloading frame (91), the free end of the other end cylinder (93) of unloading vaulting pole (94) is articulated.