CN112917173B

CN112917173B - Production line of high-frequency straight welded pipe

Info

Publication number: CN112917173B
Application number: CN202110147146.9A
Authority: CN
Inventors: 戚桂芳; 孙术松
Original assignee: Qingdao Woming Steel Pipe Co ltd
Current assignee: Qingdao Woming Automobile Pipe Manufacturing Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-02-01
Anticipated expiration: 2041-02-03
Also published as: CN112917173A

Abstract

The invention relates to a production line of high-frequency straight welded pipes, which comprises: the steel plate is separated from the blanking assembly after passing through the material storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly in sequence. According to the invention, the steel coil can be wound in advance before processing through the storage coil, so that unnecessary time waste when the steel coil needs to be processed is avoided; the material is conveyed by the driving roller to contact with the first baffle plate and fall onto the bottom plate, and then under the action of self gravity, the material is contacted with the second baffle plate and falls into the material storage frame, so that automatic blanking can be realized; the steel pipe moves relative to the inner cutter arranged on the mounting rod, the steel pipe is not cooled at the moment, the temperature of the welding seam is high, the force for cutting the welding seam is small, the surface roughness is good, and the problem of removing the welding seam inside the welded pipe is solved.

Description

Production line of high-frequency straight welded pipe

Technical Field

The invention relates to a production line of straight welded pipes, in particular to a production line of high-frequency straight welded pipes.

Background

At present add man-hour to cold-rolled steel coil of strip, need carry out the material loading to the cold-rolled steel coil of strip after opening a book, use the material loading machine now to carry out the material loading usually, but used material loading machine structure is very complicated, and use cost and cost of maintenance are higher, all need many people to install and dismantle carrying out the material loading and unloading in-process, and the installation dismantlement time is longer, wastes time and energy, still causes coil of strip damage phenomena such as buckling easily, influences the continuation processing of coil of strip. In the feeding process, when a plurality of steel coil rollers are fed, the tail end of the previous steel coil and the head end of the next steel coil need to be welded and fixed, so that the waiting time is needed, the continuous feeding in the subsequent steel pipe machining process cannot be well guaranteed, the time waste is caused, and the machining efficiency is low.

In traditional production process, the workman must take off finished product material from the transfer chain and put things in good order in the transfer case, later get into next process or directly vanning warehouse entry, when the material size is big, still need a plurality of workman together to carry, not only intensity of labour is big and the cost of labor is high, is unfavorable for reducing the manufacturing cost of enterprise, when the material has the front and back difference, still need to pay attention to when placing the workman and avoid placing the condition appearance that reverses from beginning to end, require highly to workman's harmony.

Because the straight welded pipe can produce unevenness's welding seam when the welding, can influence the product quality of welded tube, lack the effective means of the inside welding seam of cutting welded tube now. Meanwhile, when a weld joint on the outer side of the weld joint is cut, the welded pipe is easily deformed because the external cutting knife presses the welded pipe.

Disclosure of Invention

The invention aims to solve the problems, provides a production line of high-frequency straight welded pipes, solves the problems that the existing equipment cannot keep continuous feeding, has high labor intensity and low blanking efficiency, solves the problem of removing the welding seams in the welded pipes and solves the problem of deformation of the welded pipes during welding seam cutting.

A production line for high-frequency straight welded pipes, comprising: the steel plate is separated from the blanking assembly after passing through the material storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly in sequence.

On the basis of the technical scheme, the storage assembly comprises a storage assembly rack, a rotating table, a driving device, a storage coil, a feeding roller and a central roller, wherein the rotating table is arranged on the storage assembly rack and is rotationally connected with the storage assembly rack through the driving device; the material loading roller is arranged on the inner side of the material loading roll and is uniformly arranged along the circumferential direction of the material loading roll, the central roller is arranged on the inner side of the material loading roller, and the central roller and the rotating table are obliquely arranged.

On the basis of the technical scheme, the bending assembly comprises a bending assembly rack, edge pressing rollers, a plurality of bending rollers and a plurality of rounding rollers, wherein the edge pressing rollers, the bending rollers and the rounding rollers are sequentially far away from the storage assembly; the rounding rollers are provided with concave arc-shaped curved surfaces, the curvature of the concave arc-shaped curved surfaces of different rounding rollers is gradually increased towards the direction far away from the edge pressing roller, and the distance between two end surfaces of different rounding rollers is gradually decreased towards the direction far away from the edge pressing roller; and the edge pressing roller, the bending roller and the circular pressing roller are all rotationally connected with the bending assembly rack.

On the basis of the technical scheme, the bending device further comprises supporting rollers, the supporting rollers are rotatably connected with the bending assembly frame, the two supporting rollers form a supporting roller set, the two supporting rollers in the supporting roller set are respectively located on two sides of the steel plate, and the supporting roller set is used for supporting and/or limiting the steel plate.

On the basis of the technical scheme, the welding line assembly comprises a welding line assembly rack, a high-frequency heating induction coil, an upper extrusion roller, side extrusion rollers, a second portal frame and an outer cutting knife, wherein the high-frequency heating induction coil and the second portal frame are respectively positioned on two sides of the upper extrusion roller; the outer cutting knife is fixedly installed in the second portal frame, a lower supporting roller is arranged below the outer cutting knife, and the lower supporting roller is rotatably connected with the second portal frame.

On the basis of the technical scheme, a first gantry is fixedly installed on a bending assembly rack, the first gantry is located between a bending roller and a rounding roller, a fixed rod is arranged inside the first gantry, the upper end of the fixed rod is fixedly connected with the first gantry, the lower end of the fixed rod is fixedly connected with an installation rod, and the installation rod extends to the welding line assembly; the mounting rod is positioned between the outer cutter and the lower support roller, an inner cutter is arranged below the outer cutter, and the inner cutter is fixedly mounted above the mounting rod.

On the basis of the technical scheme, the lower part of the mounting rod is fixedly connected with a first U-shaped fixing rod, the middle part of the first U-shaped fixing rod is rotatably connected with a first roller wheel, and the first roller wheel is positioned below the inner cutting knife; the upper part of the mounting rod is fixedly connected with a second U-shaped fixing rod, the second U-shaped fixing rod is rotatably connected with a second roller, and the second roller is located below the upper extrusion roller.

On the basis of the technical scheme, the cutting assembly comprises a cutting assembly rack, a moving platform, a sliding sleeve, a cutting knife and a polishing disc, a track is formed above the cutting assembly rack, the moving platform is connected with the track and moves along the track, the left side and the right side of the moving platform are respectively fixedly connected with the sliding sleeve, a steel pipe is in sliding connection with the sliding sleeve, the front side and the rear side of the moving platform are respectively provided with the cutting knife and the polishing disc, and the cutting knife and the polishing disc are movably connected with the moving platform; the cutting assembly is characterized in that a motor is installed above the frame, the motor drives a lead screw to rotate, and the lead screw drives a nut fixedly installed inside the moving platform to move.

On the basis of the technical scheme, the blanking assembly comprises a blanking roller set, and the blanking roller set comprises a plurality of parallel driving rollers;

transport mechanism, including first baffle and the bottom plate of locating unloading roller set unloading direction side, one side that unloading roller set was kept away from to first baffle is forward and incurve and extend and form the second baffle, unloading roller set below is located aslope to the bottom plate, just the below of the lower one side of bottom plate is equipped with the material storage frame, and the material contacts and drops to the bottom plate with first baffle under the transporting of drive roll on, later under self action of gravity material and second baffle contact and landing to storing in the frame.

On the basis of the technical scheme, the device further comprises an uncoiler and a welding assembly, wherein the uncoiler, the welding assembly, the storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly are sequentially arranged.

The invention has the following advantages:

1. by arranging the storage coil and the feeding coil on the rotating table, on one hand, the storage coil can wind the steel coil in advance before processing, and unnecessary time waste when the steel coil needs to be processed is avoided; on the other hand, the feeding coil and the central roller are matched for use to convey the steel coil to the next processing procedure, so that continuous raw materials can be provided for subsequent steel coil processing, the phenomena of material breakage and the like are avoided, the processing efficiency is improved, and the problem that the continuous feeding cannot be maintained by the conventional equipment is solved; the separating piece is arranged between the storage coil and the feeding coil, so that the phenomenon that the steel coil is excessively bent or damaged in the conveying process to influence the subsequent further processing and use can be avoided, and the processing quality is effectively ensured;

2. the material is in contact with the first baffle plate and falls onto the bottom plate under the conveying of the driving roller, and then is in contact with the second baffle plate and falls into the material storage frame under the action of self gravity, so that automatic blanking can be realized, the automatic blanking device is not only suitable for workpieces of various shapes and types, but also can greatly reduce the labor intensity of workers and reduce the labor cost of enterprises, and in addition, as the blanking process does not involve manpower, the front and back directions of the material in the final material storage frame are consistent, higher stacking quality can be ensured, and the problems of high labor intensity and low blanking efficiency are solved;

3. when the gap distance between the two sides of the steel plate is large enough, the mounting rod extends into the steel plate, the mounting rod extends into the steel pipe of the welding line assembly inside the steel plate, and the steel pipe moves relative to an inner cutting knife arranged on the mounting rod, so that the steel pipe is not cooled, the temperature of the welding line is high, the force for cutting the welding line is small, the surface roughness is good, and the problem of removing the welding line inside the welded pipe is solved;

4. the contact points of the outer cutting knife and the inner cutting knife with the steel pipe and the contact positions of the first roller and the lower support roller with the steel pipe are located on the same plane, the thickness of the steel pipe at the welding seam can be controlled by controlling the distance between the outer cutting knife and the inner cutting knife, the inner cutting knife is supported in the first roller, the inner cutting knife gives an upward force to the steel pipe, the outer cutting knife is prevented from bending and deforming the steel pipe, and the problem of deformation of a welded pipe during welding seam cutting is solved; because the first idler wheel and the lower supporting roller are attached to the inner and outer surface cambered surfaces of the steel pipe, the surface of the steel pipe cannot be damaged during use, and the steel pipe cannot deform under stress.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary of the invention, and that other embodiments can be derived from the drawings provided by those skilled in the art without inventive effort.

FIG. 1: schematic illustration of the present invention;

FIG. 2: the overall structure schematic diagram of the storage assembly;

FIG. 3: a perspective view of the storage assembly;

FIG. 4: a top view of the storage assembly;

FIG. 5: a front view of the storage assembly;

FIG. 6: the structure schematic diagram of the storage assembly;

FIG. 7: a schematic top view of a roll-up assembly;

FIG. 8: a schematic cross-sectional structural view at a (the crimp assembly frame is not cross-sectional);

FIG. 9: a cross-sectional structural schematic at B (the crimp assembly frame is not cross-sectional);

FIG. 10: a cross-sectional structural schematic at C (the crimp assembly frame is not cross-sectional);

FIG. 11: a cross-sectional structural schematic at D (the crimp assembly frame is not cross-sectional);

FIG. 12: a cross-sectional structural schematic at E (the crimp assembly frame is not cross-sectional);

FIG. 13: the steel plate in the bending assembly is in a three-dimensional structure schematic diagram;

FIG. 14: the front view cross-sectional structure of the welding seam assembly is schematic;

FIG. 15: a cross-sectional structural schematic at F (weld assembly frame not cross-sectional);

FIG. 16: a schematic cross-sectional structure at G (components such as a weld assembly frame are not shown);

FIG. 17: the top view structure of the cutting assembly is schematic;

FIG. 18: a schematic three-dimensional structure diagram of the blanking assembly;

FIG. 19: a front view of the blanking assembly;

FIG. 20: the top view of unloading assembly.

Detailed Description

The invention is further illustrated by the following figures and examples:

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1, the present embodiment provides a production line of high-frequency straight welded pipes, including: the steel plate is separated from the blanking assembly after passing through the material storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly in sequence.

As shown in fig. 2 to 6, the magazine assembly includes a magazine assembly frame 11, a rotary table 12, a driving device 13, a magazine roll 14, a loading roll 15, a loading roll 16 and a center roll 17, the rotary table 12 is disposed on the magazine assembly frame 11 and is rotatably connected to the magazine assembly frame 11 through the driving device 13, the driving device 13 is fixedly disposed below the magazine assembly frame 11, the magazine roll 14 is disposed on the rotary table 12, the loading roll 15 is disposed on the rotary table 12 and is located inside the magazine roll 14, and the loading roll 15 is rotatably connected to the rotary table 12; the feeding rollers 16 are arranged on the inner side of the feeding roll 15 and are uniformly arranged along the circumferential direction of the feeding roll 15, the central roller 17 is arranged on the inner side of the feeding rollers 16, and the central roller 17 and the rotating table 12 are obliquely arranged. The storage assembly is provided with the storage coil 14 and the feeding coil 15 on the rotating table 12, so that on one hand, the storage coil 14 can wind the steel coil in advance before processing, and unnecessary time waste when the steel coil needs to be processed is avoided; on the other hand, the feeding coil 15 and the central roller 17 are matched for use to convey the steel coil to the next processing procedure, so that continuous raw materials can be provided for subsequent steel coil processing, the phenomena of material breakage and the like are avoided, and the processing efficiency is improved.

As shown in fig. 5, the driving device 13 includes a driving motor 131, a first gear 132, and a second gear 133, the driving motor 131 drives the first gear 132 to rotate, the second gear 133 is engaged with the first gear 132, and the second gear 133 drives the rotating table 12 to rotate.

Preferably, a barrier is also included, said barrier 18 being fixedly arranged on the rotating table 12 and between the storage roll 14 and the upper roll 15. By arranging the barrier member 18 between the storage coil 14 and the feeding coil 15, the phenomenon that the steel coil is excessively bent or damaged in the conveying process to influence the subsequent further processing and use can be avoided. On the basis of the technical scheme, the outer side wall of the blocking piece 18 is of an arc-shaped structure, and the arc-shaped side wall can play a better protection role on the surface of the steel coil in the steel coil winding process, so that the processing quality is ensured.

Preferably, be provided with first turning roll 19 on the inside wall of storage assembly frame 11, first turning roll 19 is evenly arranged along storage assembly frame 11 circumference. Through setting up first rotor roll 19, under drive arrangement 13's actuating action, the revolving stage 12 rotates, and first rotor roll 19 can play better additional action to revolving stage 12 at the rotation in-process, reduces and rotates frictional force, can also avoid the coil of strip surface of storage material book 14 and frame 1 to produce bad phenomena such as fish tail simultaneously, influences processingquality.

Preferably, the bottom end of the upper material roll 15 is uniformly provided with a second rotating roller 110, and the second rotating roller 110 is arranged on the rotating table 12. The second rotating roller 110 is provided to assist the rotation of the blanket roll 15 on the rotating table 12, thereby reducing the rotational friction.

Preferably, a supporting frame 111 is arranged at the top end of the feeding roller 16, an opening is arranged on the supporting frame 111, guide rollers 112 are symmetrically arranged on two sides of the opening, and the guide rollers 112 are rotatably connected with the supporting frame 111. Through setting up guide roll 112, not only can play the guide effect to the coil of strip, can also play the guard action when the coil of strip is exported, avoid influencing processingquality.

During operation, the uncoiled steel coil enters the rotating table 12, is wound sequentially through the storage coil 14, the barrier member 18, the feeding coil 15 and the center roller 17, and is finally output to the next processing procedure through the guide roller 112, as shown in fig. 5; in this in-process, because the coiling diameter of storage material book and material loading book is different, the speed of coil of strip input and output is different promptly, can guarantee on the one hand that continuous raw materials supply in the coil of strip rear end production, on the other hand can reserve abundant time for the front end processing coil of strip, avoids appearing disconnected material and the extravagant phenomenon of time at the course of working, has effectively promoted whole machining efficiency.

As shown in fig. 7 to 13, the bending assembly includes a bending assembly frame 131, a blank holder roll 32, a plurality of bending rolls 33 and a plurality of rounding rolls 36, the blank holder roll 32, the bending rolls 33 and the rounding rolls 36 are sequentially away from the storage assembly, a receiving roll 37 is disposed below each of the blank holder roll 32, the bending rolls 33 and the rounding rolls 36, a convex arc surface is formed on a side surface of the bending roll 33, curvatures of the convex arc surfaces of different bending rolls 33 are gradually increased towards a direction away from the blank holder roll 32, and a distance between two end surfaces of different bending rolls 33 is gradually decreased towards a direction away from the blank holder roll 32; the rounding rollers 36 are formed with concave arc-shaped curved surfaces, the curvature of the concave arc-shaped curved surfaces of different rounding rollers 36 gradually increases towards the direction far away from the edge pressing roller 32, and the distance between two end faces of different rounding rollers 36 gradually decreases towards the direction far away from the edge pressing roller 32; the edge pressing roller 32, the bending roller 33 and the rounding roller 36 are rotatably connected with the bending assembly frame 31. Concave arc-shaped curved surfaces are formed on the side surfaces of each adapting roller 37, and the concave arc-shaped curved surfaces on the side surfaces of each adapting roller 37 are matched with the curved surfaces of the edge pressing roller 32, the bending roller 33 or the rounding roller 36 above. The middle part of the side surface of the edge pressing roller 32 is provided with a concave arc-shaped curved surface, and the two ends of the side surface of the edge pressing roller 32 are provided with convex arc-shaped curved surfaces.

Preferably, the bending and coiling device further comprises supporting rollers 34, the supporting rollers 34 are rotatably connected with the bending and coiling assembly frame 31, two supporting rollers 34 form a supporting roller group, two supporting rollers 34 in the supporting roller group are respectively located on two sides of the steel plate, and the supporting roller group is used for providing support and/or limit for the steel plate.

During operation, a steel plate output by the storage assembly enters the bending assembly from the edge pressing roller 32, is extruded by the bending roller 33 and the rounding roller 36, is made into a steel pipe with an unwelded welding seam, and then leaves the bending assembly from the supporting roller group farthest from the edge pressing roller 32. First, as shown in fig. 8, both sides of the steel plate are bent, which facilitates the subsequent bending operation of the middle portion of the steel plate by the bending rolls 33. For example, the bending arcs bent by both sides of the steel plate may have a limiting function with respect to the bending roll 33. Then, as shown in fig. 9, the steel plate passes through the plurality of bending rollers 33 and the receiving rollers 37 therebelow, and the steel plate is pressed and bent more and more until the distance between the gaps at the two sides of the steel plate is smaller than the maximum distance at the two sides inside the steel plate, at this time, the bending rollers 33 cannot enter the inside of the steel plate for bending. Then, as shown in fig. 11, the steel sheet passes through a plurality of rounding rollers 36, the rounding rollers 36 press the outside of the steel sheet in cooperation with the receiving rollers 37 below, the shape of the steel sheet is pressed closer to a round pipe, and the gaps on both sides of the steel sheet are narrowed. In the process, the edge pressing roller 32, the bending roller 33, the rounding roller 36 and the receiving roller 37 can input power through shafts to enable the shafts to rotate relative to the bending assembly frame 131, so that the steel plate is extruded, and the edge pressing roller 32, the bending roller 33, the rounding roller 36 and the receiving roller 37 can also play a role in driving the steel plate to advance while the steel plate is extruded.

As shown in fig. 12, the two support rollers 34 of one set of support roller sets simultaneously function to support and restrain the steel plate.

As shown in fig. 10 and 14 to 16, the weld assembly includes a weld assembly frame 41, a high-frequency heating induction coil 42, an upper squeeze roll 43, a side squeeze roll 44, a second portal frame 45, and an outer cutter 46, the high-frequency heating induction coil 42 and the second portal frame 45 are respectively located at two sides of the upper squeeze roll 43, the high-frequency heating induction coil 42 and the second portal frame 45 are both fixedly connected with the weld assembly frame 41, the upper squeeze roll 43 is rotatably connected with the weld assembly frame 41, the two side squeeze rolls 44 are respectively located at two sides below the upper squeeze roll 43, the side squeeze rolls 44 are rotatably connected with the weld assembly frame 41, and the upper squeeze roll 43 and the side squeeze rolls 44 are both formed with concave arc-shaped curved surfaces; the outer cutting knife 46 is fixedly installed in the second portal frame 45, a lower supporting roller 47 is arranged below the outer cutting knife 46, and the lower supporting roller 47 is rotatably connected with the second portal frame 45.

Preferably, a first gantry 35 is fixedly installed on the bending assembly frame 31, the first gantry 35 is located between the bending roller 33 and the rounding roller 36, a fixing rod 351 is arranged inside the first gantry 35, the upper end of the fixing rod 351 is fixedly connected with the first gantry 35, the lower end of the fixing rod 351 is fixedly connected with the installation rod 7, and the installation rod 7 extends to the welding seam assembly; the mounting rod 7 is positioned between the outer cutter 46 and the lower support roller 47, an inner cutter 71 is arranged below the outer cutter 46, and the inner cutter 71 is fixedly mounted above the mounting rod 7.

Preferably, the lower part of the mounting rod 7 is fixedly connected with a first U-shaped fixing rod 72, the middle part of the first U-shaped fixing rod 72 is rotatably connected with a first roller 73, and the first roller 73 is positioned below the inner cutting knife 71; the upper part of the mounting rod 7 is fixedly connected with a second U-shaped fixing rod 74, the second U-shaped fixing rod 74 is rotatably connected with a second roller 75, and the second roller 75 is positioned below the upper extrusion roller 43.

As shown in fig. 10, the fixing rod 351 extends into the steel plate when the distance between the two sides of the steel plate is enough to pass through, the mounting rod 7 extends towards the direction of the welding seam assembly, and the first roller 73 contacts with the inside of the steel pipe, so as to support the end of the mounting rod 7 and prevent the end of the mounting rod 7 from inclining.

As shown in fig. 14, the steel pipe enters the weld assembly from the high-frequency heating induction coil 42, the steel pipe passes through the inside of the high-frequency heating induction coil 42, both sides of the weld of the steel pipe are rapidly heated to a designated temperature by the high-frequency heating induction coil 42, and then the steel pipe is driven to move in the direction of the upper squeeze roll 43.

As shown in fig. 15, the rotation shafts of the two side press rolls 44 and the upper press roll 43 are located on the same plane, which is perpendicular to the axis of the steel pipe. Both the side pressing rolls 44 and the upper pressing roll 43 are formed with circular arc surfaces, and the curvatures of the circular arc surfaces of the side pressing rolls 44 and the upper pressing roll 43 are the same. The side squeeze rolls 44 and the upper squeeze roll 43 on both sides squeeze the steel pipe into a circular tube shape, squeeze both sides of the weld of the steel pipe to be attached, and both sides of the weld of the steel pipe are fixed as a whole at high temperature. The two side pressing rollers 44 and the upper pressing roller 43 may be rotated by their rotation shafts while driving the steel pipe to move.

The rotating shaft of the second roller 75 and the rotating shaft of the upper squeeze roller 43 are located on the same plane, the upper squeeze roller 43 contacts with the outer side face of the steel pipe, and the second roller 75 contacts and is attached to the inner side face of the steel pipe, so that the steel pipe is supported and prevented from deforming. The upper extrusion roller 43 and the second roller 75 are matched together to extrude the welding seam of the steel pipe, so that the welding seam of the steel pipe is close to a circular arc shape, and the height of the inward or outward bulge of the welding seam is reduced.

And after the steel pipe is welded, the steel pipe moves towards the second portal frame 45, the steel pipe moves relative to the outer cutting knife 46 and the inner cutting knife 71, the outer cutting knife 46 and the inner cutting knife 71 respectively cut the upper surface and the lower surface of the weld joint, and redundant materials at the weld joint are cut off. Wherein, the contact points of the outer cutter 46 and the inner cutter 71 with the steel pipe and the contact points of the first roller 73 and the lower support roller 47 with the steel pipe are positioned on the same plane. The thickness of the weld of the steel pipe can be controlled by only controlling the distance between the outer cutter 46 and the inner cutter 71.

The convex arc surface of the first roller 73 and the concave arc surface of the lower support roller 47 are respectively attached to the inner side surface and the outer side surface of the steel pipe, so that the steel pipe is not deformed by the extrusion of the first roller 73 and the lower support roller 47 while the inner cutting knife 71 is supported. Meanwhile, the first roller 73 and the lower support roller 47 may also be steel pipe lower end straight.

At the same time as the welding, the water spray head 47 sprays water or a coolant to the high-frequency heating induction coil 42 and the upper squeeze roller 43 to reduce the temperature.

The steel pipe enters a cooling assembly after leaving the welding line assembly, and the cooling assembly adopts the principle of cooling the steel pipe by using water or cooling liquid. The cooling assembly comprises a water pipe and a spray head, the water pipe is used for conveying water, and the spray head can spray water to the steel pipe. The cooling assembly may employ existing cooling devices.

As shown in fig. 17, the cutting assembly includes a cutting assembly frame 51, a moving platform 53, a sliding sleeve 54, a cutting knife 55 and a polishing disc 56, a rail 52 is formed above the cutting assembly frame 51, the moving platform 53 is connected with the rail 52 and moves along the rail 52, the left and right sides of the moving platform 53 are respectively fixedly connected with the sliding sleeve 54, a steel pipe is slidably connected with the sliding sleeve 54, the front and rear sides of the moving platform 53 are respectively provided with the cutting knife 55 and the polishing disc 56, and the cutting knife 55 and the polishing disc 56 are movably connected with the moving platform 53; a motor 58 is installed above the cutting assembly rack 51, the motor 58 drives a lead screw 57 to rotate, and the lead screw 57 drives a nut fixedly installed inside the moving platform 53 to move.

During operation, the steel pipe moves along the cutting assembly frame 51, and the moving platform 53 moves relative to the steel pipe until the speed of the moving platform is the same as that of the steel pipe, so that the moving platform 53 and the steel pipe are relatively static. At this time, the driving mechanism (which may be an electric push rod or an air cylinder) pushes the cutting knife 55 (which refers to the entire cutting machine including the driving motor) to move towards the steel pipe, and the cutting knife 55 resets after cutting the steel pipe. Then, another driving mechanism (which may be an electric push rod or an air cylinder) pushes the polishing disc 56 (which refers to the entire polishing machine including the driving motor) to move toward the steel pipe, and after the end of the steel pipe is polished, the polishing disc 56 is reset. Then, the movable platform 53 is moved relative to the steel pipe, and returns to the initial position to prepare for repeating the above operation to cut the steel pipe again.

As shown in fig. 18 to 20, the blanking assembly includes a blanking roller group including a plurality of juxtaposed drive rollers 61; the material conveying device further comprises a second driving unit (not shown), wherein the second driving unit comprises a driving motor, a chain wheel and a chain, the driving motor drives a plurality of parallel driving rollers 61 to synchronously rotate through the chain wheel and the chain, and materials are continuously conveyed forwards. The driving device further comprises a vertical plate 69, a roller shaft of the driving roller 61 is vertically connected to the vertical plate 69, a bearing is sleeved at the joint of the roller shaft and the vertical plate 69, and an annular flange 611 is welded on the periphery of one side, away from the vertical plate 69, of the driving roller 61.

The transfer mechanism comprises a first baffle plate 62 and a bottom plate 63 which are arranged on the blanking direction side of a blanking roller set, wherein the first baffle plate 62 is arranged on one side of the blanking roller set far away from the second baffle plate 64 and is bent inwards to form a second baffle plate 64, the first baffle plate 62 is arranged on one side of the blanking roller set and is bent inwards to form a third baffle plate 68, the bottom plate 63 is obliquely arranged below the blanking roller set, the bottom plate 63 is provided with an angle downwards inclined from the first baffle plate 62 to the second baffle plate 64, the inclination angle is 15-30 degrees, the bottom plate 63 is provided with a supporting frame 631 used for supporting the bottom plate 63, the bottom surface of the supporting frame 31 is screwed on the bottom surface, the side wall of the supporting frame 631 is welded with the inner side wall of the first baffle plate 62, the side wall of the bottom plate 63 is welded with the positions where the first baffle plate 62, the second baffle plate 64 and the third baffle plate 68 are jointed, a material storage frame 65 is arranged below the lower side of the bottom plate 63, the material contacts with the first baffle plate 62 and falls onto the bottom plate 63 under the transportation of the driving roller 61, and then contacts with the second baffle plate 64 and slides into the material storage frame 65 under the self-gravity effect, in other embodiments, the bottom plate 63 may also be arranged to be inclined downwards from the first baffle plate 62 to the third baffle plate 68, at this time, the material contacts with the first baffle plate 62 and falls onto the bottom plate 63 under the transportation of the driving roller 61, and then slides into the material storage frame 65 under the self-gravity effect, wherein the second baffle plate 64 can block the material to prevent the material from falling from the bottom plate 63.

The material storage frame 65 is in a bucket shape with a large top and a small bottom, and a vertical side plate 651 is arranged on the sealing side of the material storage frame 65 along the length direction. Deposit material frame 651 is equipped with the opening along length direction's opposite side, still includes whole material body mechanism, whole material body mechanism includes first drive unit 66 and push pedal 67, push pedal 67 with deposit material frame 65 open side articulated, specifically be that the lower limb of push pedal 67 and deposit material frame 65's bottom plate pass through the hinge articulated, first drive unit 66 is the cylinder, the tailpiece of the piston rod of cylinder and push pedal 67's lateral wall articulate, the other end of cylinder with locate subaerial base articulated, push pedal 67 can push the sign indicating number flat to the material in depositing material frame 65 under the effect of cylinder, make things convenient for the workman to tie up the packing.

The steel pipe leaves the cutting assembly and then enters the blanking assembly, and leaves the production line after the blanking assembly finishes the working procedure.

As shown in fig. 1, the device further comprises an uncoiler and a welding assembly, wherein the uncoiler, the welding assembly, the storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly are sequentially arranged. The uncoiler is used for uncoiling the steel coil, and the welding assembly is used for welding different steel plates to form a long steel plate and inputting the long steel plate into the storage assembly. Both uncoilers and welding machines for welding assemblies are known in the art and are not described in detail herein. The direction of the arrow in fig. 1 is the moving direction of the material, and the relative positions of the frames of the assemblies of the present application are fixed.

The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.

Claims

1. A production line of high-frequency straight welded pipes is characterized by comprising: the steel plate is separated from the blanking assembly after sequentially passing through the material storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly;

the storage assembly comprises a storage assembly rack (11), a rotating table (12), a driving device (13), a storage roll (14), a feeding roll (15), a feeding roll (16) and a center roll (17), wherein the rotating table (12) is arranged on the storage assembly rack (11) and is rotationally connected with the storage assembly rack (11) through the driving device (13), the driving device (13) is fixedly arranged below the storage assembly rack (11), the storage roll (14) is arranged on the rotating table (12), the feeding roll (15) is arranged on the rotating table (12) and is positioned on the inner side of the storage roll (14), and the feeding roll (15) is rotationally connected with the rotating table (12); the feeding rollers (16) are arranged on the inner side of the feeding roll (15) and are uniformly arranged along the circumferential direction of the feeding roll (15), the central roller (17) is arranged on the inner side of the feeding rollers (16), and the central roller (17) and the rotating table (12) are obliquely arranged.

2. The production line of high-frequency straight welded pipes according to claim 1, characterized in that: the bending assembly comprises a bending assembly rack (31), an edge pressing roller (32), a plurality of bending rollers (33) and a plurality of rounding rollers (36), wherein the edge pressing roller (32), the bending rollers (33) and the rounding rollers (36) are sequentially far away from the storage assembly, a receiving roller (37) is arranged below each edge pressing roller (32), each bending roller (33) and each rounding roller (36), a convex arc surface is formed on the side surface of each bending roller (33), the curvature of the convex arc surface of each different bending roller (33) is gradually increased towards the direction far away from the edge pressing roller (32), and the distance between the two end surfaces of each different bending roller (33) is gradually decreased towards the direction far away from the edge pressing roller (32); the rounding rollers (36) are provided with concave arc-shaped curved surfaces, the curvature of the concave arc-shaped curved surfaces of different rounding rollers (36) is gradually increased towards the direction far away from the edge-pressing roller (32), and the distance between two end surfaces of different rounding rollers (36) is gradually decreased towards the direction far away from the edge-pressing roller (32); and the edge pressing roller (32), the bending roller (33) and the rounding roller (36) are rotationally connected with the bending assembly rack (31).

3. The production line of high-frequency straight welded pipes according to claim 2, characterized in that: the steel plate bending device is characterized by further comprising supporting rollers (34), the supporting rollers (34) are rotatably connected with the bending assembly rack (31), the two supporting rollers (34) form a supporting roller set, the two supporting rollers (34) in the supporting roller set are located on two sides of the steel plate respectively, and the supporting roller set is used for supporting and/or limiting the steel plate.

4. The production line of high-frequency straight welded pipes according to claim 2, characterized in that: the welding line assembly comprises a welding line assembly rack (41), a high-frequency heating induction coil (42), an upper extrusion roller (43), side extrusion rollers (44), a second portal frame (45) and an outer cutting knife (46), wherein the high-frequency heating induction coil (42) and the second portal frame (45) are respectively positioned on two sides of the upper extrusion roller (43), the high-frequency heating induction coil (42) and the second portal frame (45) are fixedly connected with the welding line assembly rack (41), the upper extrusion roller (43) is rotatably connected with the welding line assembly rack (41), the two side extrusion rollers (44) are respectively positioned on two sides below the upper extrusion roller (43), the side extrusion rollers (44) are rotatably connected with the welding line assembly rack (41), and the upper extrusion roller (43) and the side extrusion rollers (44) are both formed with arc-shaped concave curved surfaces; the outer cutting knife (46) is fixedly installed in the second portal frame (45), a lower supporting roller (47) is arranged below the outer cutting knife (46), and the lower supporting roller (47) is rotatably connected with the second portal frame (45).

5. The production line of high-frequency straight welded pipes according to claim 4, characterized in that: a first gantry (35) is fixedly installed on the bending assembly rack (31), the first gantry (35) is located between the bending roller (33) and the circular pressing roller (36), a fixing rod (351) is arranged inside the first gantry (35), the upper end of the fixing rod (351) is fixedly connected with the first gantry (35), the lower end of the fixing rod (351) is fixedly connected with an installation rod (7), and the installation rod (7) extends to a welding seam assembly; the mounting rod (7) is located between the outer cutting knife (46) and the lower supporting roller (47), an inner cutting knife (71) is arranged below the outer cutting knife (46), and the inner cutting knife (71) is fixedly mounted above the mounting rod (7).

6. The production line of high-frequency straight welded pipes according to claim 5, characterized in that: the lower part of the mounting rod (7) is fixedly connected with a first U-shaped fixing rod (72), the middle part of the first U-shaped fixing rod (72) is rotatably connected with a first roller (73), and the first roller (73) is positioned below the inner cutter (71); the upper part of the mounting rod (7) is fixedly connected with a second U-shaped fixing rod (74), the second U-shaped fixing rod (74) is rotatably connected with a second roller (75), and the second roller (75) is positioned below the upper extrusion roller (43).

7. The production line of high-frequency straight welded pipes according to claim 1, characterized in that: the cutting assembly comprises a cutting assembly rack (51), a moving platform (53), a sliding sleeve (54), a cutting knife (55) and a polishing disc (56), a track (52) is formed above the cutting assembly rack (51), the moving platform (53) is connected with the track (52) and moves along the track (52), the left side and the right side of the moving platform (53) are respectively fixedly connected with the sliding sleeve (54), a steel pipe is slidably connected with the sliding sleeve (54), the front side and the rear side of the moving platform (53) are respectively provided with the cutting knife (55) and the polishing disc (56), and the cutting knife (55) and the polishing disc (56) are movably connected with the moving platform (53); the cutting assembly is characterized in that a motor (58) is installed above the cutting assembly rack (51), the motor (58) drives a lead screw (57) to rotate, and the lead screw (57) drives a nut fixedly installed inside the moving platform (53) to move.

8. The production line of high-frequency straight welded pipes according to claim 1, characterized in that: the blanking assembly comprises a blanking roller set, and the blanking roller set comprises a plurality of parallel driving rollers (61);

transport mechanism, including first baffle (62) and bottom plate (63) of locating unloading roller set unloading direction side, one side that unloading roller set was kept away from in first baffle (2) is forward and inside bend extension forms second baffle (64), unloading roller set below is located aslope to bottom plate (63), just the below of the lower one side of bottom plate (63) is equipped with deposits frame (65), and the material contacts and drops to bottom plate (63) with first baffle (62) under the transport of drive roll on, later under self action of gravity material and second baffle (64) contact and landing to depositing in frame (65).

9. The production line of high-frequency straight welded pipes according to claim 1, characterized in that: the device is characterized by further comprising an uncoiler and a welding assembly, wherein the uncoiler, the welding assembly, the material storage assembly, the bending assembly, the welding line assembly, the cutting assembly and the blanking assembly are sequentially arranged.