CN210499510U

CN210499510U - Square tube production line

Info

Publication number: CN210499510U
Application number: CN201921346083.4U
Authority: CN
Inventors: 刘龙剑; 刘峰涛
Original assignee: Hebei Tengtian Welded Pipe Equipment Manufacturing Co ltd
Current assignee: Hebei Tengtian Welded Pipe Equipment Manufacturing Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-05-12
Anticipated expiration: 2029-08-19

Abstract

The utility model provides a square pipe production line belongs to metal cold-bending forming processing equipment technical field, including being used for in proper order the rough profiled section of the pipe that is had open-ended side with raw and other materials steel sheet roll-in the direction of motion of the body, a smart shaping section for carrying out the roll-in with the body after the rough profiled and further reducing square pipe open-ended width, a closed workshop section of opening for with on the body, a welding set for welding the opening of body makes the body become closed rectangle, and be used for extrudeing the fixed more firm extrusion device of messenger body open-ended welding department to the body. The strip steel is directly rolled and processed into the square pipe or the rectangular pipe by the strip steel sequentially through the rough forming section, the fine forming section, the closed working section, the welding device and the extruding device, so that the step of manufacturing the square pipe is saved, the square pipe or the rectangular pipe can be processed and formed only by one-step forming, the unnecessary deformation process is reduced, and meanwhile, the energy consumption and the roller abrasion of deformation during the manufacturing of the pipe body are also reduced.

Description

Square tube production line

Technical Field

The utility model belongs to the technical field of metal forming and processing equipment, more specifically say, relate to a square pipe production line.

Background

The square tube is a square tube type, generally has a hollow structure, and can be made of various materials to form a square tube body. At present, the square tube is produced by two methods. One is to cold bend the steel strip into a closed circular tube through a multi-pass forming frame, and then size-sizing the steel strip after high-frequency welding to form a square tube or a rectangular tube. The cold roll forming has the disadvantages that each specification of pipe needs a roller with a corresponding specification, and the rollers need to be replaced when the unit changes the size of the steel pipe. The cylindrical squaring method firstly rolls the straight strip steel into a pipe body with a circular cross section, and then secondarily forms the circular pipe body into a pipe body with four rectangular rectangles, so that unnecessary deformation processes are increased, and the deformation energy consumption and the roller abrasion during pipe body manufacturing are increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a square pipe production line aims at solving the square pipe among the prior art and has adopted the technology of circle square of turning to increase the energy consumption of deformation and the problem of roll wearing and tearing when body unnecessary deformation process has increaseed the body preparation.

In order to achieve the above object, the utility model adopts the following technical scheme: the square tube production line comprises a rough forming section, a fine forming section, a closed working section, a welding device and an extruding device, wherein the rough forming section is used for rolling a raw material steel plate into a square tube with an opening, the fine forming section is used for rolling the tube after rough forming to further reduce the width of the opening of the square tube, the closed working section is used for closing the opening on the tube, the welding device is used for welding the opening of the tube to enable the tube to be a closed rectangle, and the extruding device is used for extruding the tube to enable the welding position of the opening of the tube to be fixed more firmly; the rough forming section comprises a plurality of squaring flat roll frames which are sequentially arranged along the motion direction of the pipe body and side flat roll frames which are arranged behind the squaring flat roll frames along the motion direction of the pipe body, the fine forming section comprises a plurality of squaring flat roll frames which are sequentially arranged along the motion direction of the pipe body, and the closed working section comprises a plurality of side extrusion roll frames.

Furthermore, the square tube production line further comprises a scraping and welding working section which is arranged on the side surface of the extrusion device far away from the welding device and used for removing redundant welding slag on the outer wall of the tube body, and the scraping and welding working section comprises a plurality of scraping and welding devices which are sequentially arranged.

Furthermore, the square tube production line also comprises a plurality of supporting roller frames which are respectively arranged between the two square flat roller frames or between the square flat roller frames and the side extrusion roller frames and are used for supporting the tube body.

Furthermore, the extrusion device comprises a base, a lifting frame arranged on the base and positioned on the side surface of the base, and two side roller seats arranged on the base, wherein both the side roller seats can be movably arranged on the base;

the device comprises a lifting rack, a first lifting mechanism and a second lifting mechanism, wherein the lifting rack is provided with an upper extrusion roller which is used for extruding a pipe body to be processed and can be rotatably arranged on the lifting rack, the upper extrusion roller can move along the height direction of the lifting rack, and the lifting rack is also provided with the first lifting mechanism used for adjusting the height of the upper extrusion roller;

the two side roller seats are respectively provided with a side pressing roller which is used for extruding the pipe body to be processed and is rotatably arranged on the side roller seats, and the two side pressing rollers are respectively arranged on two sides of the upper extruding roller;

the side roller seats are also provided with a second lifting mechanism for adjusting the side pressing rollers, and the base is also provided with an opening and closing mechanism for adjusting the distance between the two side roller seats;

the base is further provided with a lower carrier roller which is used for supporting the pipe body to be processed and is rotatably arranged on the base, and the lower carrier roller is arranged between the two side pressing rollers and is positioned below the upper extrusion roller.

Furthermore, the circumference of each of the two side press rollers is provided with an accommodating groove for accommodating the lower carrier roller, the accommodating grooves are formed in the end parts, close to the lower carrier roller, of the side press rollers and are arranged along the circumferential direction of the side press rollers, and the two accommodating grooves form a cavity for accommodating the lower carrier roller.

Furthermore, the number of the upper squeeze rollers is two, the two upper squeeze rollers are arranged on the lifting rack at included angles, and the two upper squeeze rollers are symmetrically arranged along the central planes of the side press rollers.

Furthermore, the side extrusion roll frame comprises a side pressing frame, a lower roll mechanism arranged on the side pressing frame, two side roll mechanisms which are arranged on the side pressing frame and are symmetrically positioned above the lower roll mechanism, and an upper roll mechanism which is arranged on the side pressing frame and is positioned above the side roll mechanisms.

Furthermore, the upper roll mechanism comprises a mounting cross beam movably arranged on the side press frame, an upper rotating roll rotatably arranged on the mounting cross beam and a pulling structure arranged on the side press frame and used for driving the mounting cross beam to move up and down along the height direction of the side press frame.

Furthermore, the side roller mechanism comprises a side sliding block movably arranged on the side press frame, a side rotating roller rotatably arranged on the side sliding block, a pulling screw rod rotatably arranged on the side press frame and the end part of the pulling screw rod is connected with the side sliding block, and a power unit arranged on the side press frame and used for driving the pulling screw rod to rotate, wherein the pulling screw rod is connected with the side sliding block, and the two side sliding blocks move oppositely or oppositely under the driving of the pulling screw rod.

Further, the lower roll mechanism comprises a rotating shaft which is rotatably arranged on the side pressing machine frame and a lower rotating roll which is sleeved on the rotating shaft.

The utility model provides a square tube production line's beneficial effect lies in: compared with the prior art, the steel strip is preliminarily processed through the rough forming end consisting of the plurality of squaring flat roll frames and the side extrusion roll frames which are sequentially arranged along the motion direction of the tube body, and the steel strip is rolled into the tube body with a certain opening. And then further processing the pipe body through a fine forming section consisting of a plurality of square flat roller frames of the pipe body so as to reduce the width of an opening on the pipe body. The pipe body enters a closed section after passing through the fine forming section, and the opening on the pipe body is closed through a plurality of air compression roller frames forming the closed section. The opening part on the body is welded through the welding set after the opening is closed on the body, and finally, the welding seam of the body is fixed more firmly through the further extrusion of the body by the extrusion device. The utility model discloses square pipe production line through looping through rough shaping section, smart shaping section, closing workshop section, welding set and extrusion device with belted steel direct roll-in processing into square pipe or rectangular pipe, has saved the step of square pipe preparation to only need one shot forming can with square pipe or rectangular pipe machine-shaping, reduced unnecessary deformation process, energy consumption and the roll wearing and tearing that warp when also reducing the body preparation simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a square tube production line provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an extrusion apparatus used in an embodiment of the present invention;

FIG. 3 is a schematic side view of the extrusion apparatus shown in FIG. 2;

FIG. 4 is a schematic structural view of a side squeeze roll stand according to an embodiment of the present invention;

fig. 5 is a side view schematically showing the pressing device shown in fig. 4.

In the figure: 1. a coarse molding section; 2. a fine molding section; 3. a closed section; 4. a welding device; 5. an extrusion device; 51. a base; 52. a lifting frame; 53. a side roller seat; 54. an upper squeeze roll; 55. a side press roll; 56. a lower carrier roller; 57. a first lifting mechanism; 571. a second chute; 572. a sliding plate; 573. a drive structure; 58. a second lifting mechanism; 581. a side roll cassette; 582. an adjustment structure; 59. an opening and closing mechanism; 591. opening and closing the support; 592. a switching worm gear; 593. a worm is opened and closed; 594. opening and closing the screw rod; 6. a squaring flat roll stand; 7. a side flat roll stand; 8. a side extrusion roll stand; 81. laterally pressing the rack; 82. a lower roll mechanism; 821. a rotating shaft; 822. a lower turning roll; 83. a side roller mechanism; 831. a side slider; 832. a side turning roller; 833. pulling the screw rod; 834. a power unit; 84. an upper roll mechanism; 841. mounting a cross beam; 842. an upper rotating roller; 843. a pulling structure; 9. and (4) a scraping and welding device.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, the square tube production line of the present invention will now be described. The square tube production line sequentially comprises a rough forming section 1 for rolling a raw material steel plate into a square tube with an opening, a fine forming section 2 for rolling the tube after rough forming to further reduce the width of the opening of the square tube, a closed working section 3 for closing the opening on the tube, a welding device 4 for welding the opening of the tube to enable the tube to be a closed rectangle, and an extrusion device 5 for extruding the tube to enable the welding position of the opening of the tube to be fixed more firmly; the rough forming section 1 comprises a plurality of squaring flat roll frames 6 which are sequentially arranged along the motion direction of the pipe body and side flat roll frames 7 which are arranged at the rear parts of the squaring flat roll frames 6 along the motion direction of the pipe body, the fine forming section 2 comprises a plurality of squaring flat roll frames 6 which are sequentially arranged along the motion direction of the pipe body, and the closed working section 3 comprises a plurality of side squeeze roll frames 8.

The square pipe production line that this embodiment provided compares with prior art, carries out the primary processing to the steel band through the rough forming end that becomes square plain-barreled roll frame 6 and the side squeeze roll frame 8 that set gradually on a plurality of edges body direction of motion and constitute, rolls in the steel band for having certain open-ended body. The tube is then further processed by a fine forming section 2 comprising a plurality of square flat roll stands 6 to reduce the width of the opening in the tube. The pipe body enters the closed working section 3 after passing through the fine forming section 2, and the opening on the pipe body is closed through a plurality of air compression roller frames forming the closed working section 3. The opening part on the body is welded through welding set 4 after the opening is closed on the body, and finally the welding seam of the body is fixed more firmly through further extrusion of extrusion set 5 with the body. The utility model discloses square pipe production line is through looping through thick shaping section 1, smart shaping section 2, the workshop section of remaining silent 3, welding set 4 and extrusion device 5 with belted steel direct roll-in processing into square pipe or rectangular pipe, has saved the step of square pipe preparation to only need one shot forming can with square pipe or rectangular pipe machine-shaping, reduced the unnecessary deformation process, energy consumption and the roll wear that warp when also reducing the body preparation simultaneously.

Alternatively, the welding device 4 is generally a submerged arc welding machine, the type of the submerged arc welding machine used in this embodiment is NBC-350, and the welding device 4 may also be other types and kinds of welding equipment.

As a specific embodiment of the square tube production line provided by the utility model, please refer to fig. 1 together, square tube production line still including set up extrusion device 5 keep away from welding set 4 the side be used for with the body outer wall on unnecessary welding slag get rid of scrape weld the workshop section, scrape weld the workshop section including a plurality of scrape that set gradually weld device 9. Scrape and weld device 9 including scraping the welding machine frame and setting up the scraper on scraping the welding machine frame, the scraper supports and leans on the welding seam department on the outer wall of body to the tip of scraper is hugged closely the setting with the outer wall of body. After the pipe body passes through the extrusion device 5, the pipe body sequentially passes through a plurality of scraping welding devices 9 of the scraping welding workshop section, welding slag protruding out of the outer wall of the pipe body is scraped by scraping a scraper on the welding device 9, and the outer wall of the pipe body is more smooth and attractive.

As a specific implementation manner of the square tube production line, please refer to fig. 1, the square tube production line further includes a plurality of supporting roller frames respectively arranged between the two squaring flat roller frames 6 or between the squaring flat roller frame 6 and the side squeeze roller frame 8 for supporting the tube body. The supporting roller frame can be arranged between any two devices far away from each other on a production line, so that the pipe body can be prevented from being bent under the action of self gravity due to the overlarge distance between the two devices when the pipe body moves between the two devices, the rolling precision of the pipe body is influenced, and the rolling processing of the pipe body is more accurate and convenient. Optionally, the support roller frame includes a rolling roller shaft for supporting the pipe body and a support frame body for mounting the rolling roller shaft, and the rolling roller shaft is rotatably disposed on the top of the support frame body. The supporting roller frame has simple structure and convenient installation and use.

As a specific implementation manner of the square tube production line provided by the present invention, please refer to fig. 2 and fig. 3, the extruding device 5 includes a base 51, a lifting frame 52 disposed on the base 51 and located at the side of the base 51, and two side roller seats 53 disposed on the base 51, wherein both side roller seats 53 are movably disposed on the base 51; the lifting frame 52 is provided with an upper extrusion roller 54 which is used for extruding the pipe body to be processed and can be rotatably arranged on the lifting frame 52, the upper extrusion roller 54 can move along the height direction of the lifting frame 52, and the lifting frame 52 is also provided with a first lifting mechanism 57 which is used for adjusting the height of the upper extrusion roller 54; the two side roller seats 53 are respectively provided with a side pressing roller 55 which is used for extruding the pipe body to be processed and is rotatably arranged on the side roller seats 53, and the two side pressing rollers 55 are respectively arranged on two sides of the upper extruding roller 54; the side roller seats 53 are also provided with second lifting mechanisms 58 for adjusting the side pressing rollers 55, and the base 51 is also provided with an opening and closing mechanism 59 for adjusting the distance between the two side roller seats 53; the base 51 is further provided with a lower supporting roller 56 which is rotatably arranged on the base 51 and used for supporting the pipe body to be processed, and the lower supporting roller 56 is arranged between the two side pressing rollers 55 and is positioned below the upper pressing roller 54.

An elevator frame 52 is provided on a side surface of the base 51, and an upper squeeze roller 54 which is vertically adjustable is provided on the elevator frame 52. Two side roller holders 53 are further provided on the base 51, and side pressing rollers 55 are rotatably provided on the two side roller holders 53. And a lower idler 56 is also provided on the bed 51. The two side roller seats 53, the upper extrusion roller 54 and the lower carrier roller 56 form an extrusion cavity for the pipe body to pass through, the height of the upper extrusion roller 54 can be conveniently adjusted through the first lifting mechanism 57, the distance between the two side compression rollers 55 and the heights of the two side compression rollers 55 are respectively adjusted through the opening and closing mechanism 59 and the second lifting mechanism 58, the size of the extrusion cavity can be conveniently adjusted according to the size of the square pipe to be processed, and the square pipes with different specifications can be produced without replacing the rollers.

As a specific implementation manner of the square pipe production line, please refer to fig. 2 and fig. 3, all be provided with the recess that holds that is used for holding snub pulley 56 on the circumference of both sides compression roller 55, hold the recess setting and be close to the tip of snub pulley 56 and set up along the circumferencial direction of snub pulley 55 at snub pulley 55, two cavity that hold the recess constitution and be used for holding snub pulley 56. This moment side compression roller 55 is the T type along its axial cross section, and the setting that holds the recess divides into the side compression roller 55 working part and the part of stepping down, and the setting that holds the recess makes this direct one-tenth side extrusion device 5 of this side can adjust very little distance with snub pulley 56 and both sides compression roller 55 when the less side pipe of machined dimension, has increased the distance of the regulation of both sides compression roller 55, makes the workable size range of this one-tenth side extrusion device 5 wider.

As a specific implementation manner of the square tube production line provided by the present invention, please refer to fig. 2 and fig. 3, the number of the upper squeeze rollers 54 is two, the two upper squeeze rollers 54 are disposed on the lifting frame 52 at an included angle, and the two upper squeeze rollers 54 are symmetrically disposed along the center plane of the two side compression rollers 55. The number of the upper extrusion rollers 54 is two, and the upper extrusion rollers 54 are all obliquely arranged on the lifting support, so that when a square tube with a larger size is produced, the upper plane of the tube body can be hardly completely coated by one upper extrusion roller 54 in the same place, and the upper plane of the tube body can be effectively coated by two upper extrusion rollers 54, so that the tube body is better in extrusion effect. And the mutual inclined arrangement of the upper squeeze rollers 54 can ensure that the circumferences of the upper squeeze rollers 54 abut against each other and the installation part can keep a longer distance, so that the installation of the upper squeeze rollers 54 is more convenient and the design is more reasonable. Optionally, the two upper squeeze rollers 54 are both conical, the two upper squeeze rollers 54 are symmetrically arranged along the central plane of the two side press rollers 55, and when the two upper squeeze rollers 54 are obliquely arranged, the circumference of the pipe body abutted against the upper plane of the pipe body can be kept horizontal or nearly horizontal, so that the pipe body is better in squeezing effect when being squeezed after being welded.

As a specific embodiment of the square tube direct squaring and extruding device 5 provided by the present invention, please refer to fig. 2 and fig. 3, the number of the opening and closing mechanisms 59 is two, the two opening and closing mechanisms 59 are respectively disposed at the outer sides of the side roller bases 53, and the roller bases 53 at the two sides move in opposite directions or relatively to each other through the driving of the opening and closing mechanisms 59. The opening and closing mechanisms 59 are two mechanisms which can respectively adjust the distance between the roller seats 53 at the two sides from the side surfaces of the roller seats 53, and each roller seat 53 is adjusted by using the independent opening and closing mechanism 59, so that the adjustment of the roller seats 53 is quicker and more labor-saving. The use of the squeezing means 5 is made more convenient.

As a specific implementation manner of the square tube direct squaring extrusion device 5 provided by the utility model, please refer to fig. 2 and fig. 3, the opening and closing mechanism 59 includes the opening and closing support 591 arranged on the base 51, the rotatable opening and closing worm wheel 592 arranged on the opening and closing support 591 and the rotatable opening and closing worm 593 arranged on the opening and closing support 591 for driving the opening and closing worm wheel 592 to rotate, the opening and closing worm wheel 592 is further provided with the opening and closing screw 594 running through the opening and closing worm wheel 592 and connected with the opening and closing worm wheel 592 through screw threads, and one end of the opening and closing screw 594 is rotatably connected to the side of the side roller seat 53. The base 51 is further provided with a power unit 834 for driving the opening and closing worm 593 to rotate, the power unit 834 generally adopts an electric motor, the opening and closing worm 593 is driven to rotate through the power unit 834 when the position of the side roller seat 53 is adjusted, then the opening and closing worm is driven to rotate the opening and closing worm wheel 592, at the moment, the opening and closing worm wheel 592 drives the opening and closing screw 594 to move along the axial direction of the opening and closing screw 594 through threads arranged between the opening and closing screw 594 and the opening and closing worm wheel 592, so that the side roller seat 53 is pulled to move together along the axial direction of the opening and closing screw 594, and the movement and adjustment of the side roller seat 53.

As a specific implementation manner of the square tube direct squaring extrusion device 5, please refer to fig. 2 and fig. 3, still be provided with on the base 51 and be used for installing the first spout that side roller seat 53 and set up along the lower roll 56 axial, the bottom slidable of side roller seat 53 sets up in first spout, still is provided with on the base 51 to be used for compressing tightly the side roller seat 53 and install the apron that compresses tightly inside the first spout. The first sliding groove and the pressing cover plate are arranged to enable the side roller seat 53 to move on the base 51 more conveniently, meanwhile, the side roller seat 53 is installed on the base 51 more firmly, the side roller seat 53 is prevented from falling off from the base 51 when sliding in the first sliding groove, and the side roller seat 53 is installed more firmly and reliably.

As a specific embodiment of the square tube direct squaring extrusion device 5 provided by the present invention, please refer to fig. 2 and 3, the first lifting mechanism 57 includes a second chute 571 disposed on the lifting frame 52 and disposed along the height direction of the lifting frame 52, a sliding plate 572 slidably disposed in the second chute 571 and used for mounting the extrusion roller 54, and a driving structure 573 for driving the sliding plate 572 to move up and down. When the upper squeeze rollers 54 need to adjust the height according to the position of the side squeeze roller 55, the driving structure 573 drives the sliding plate 572 to slide along the length direction of the second sliding slot 571, so as to achieve the purpose of adjusting the heights of the two upper squeeze rollers 54 simultaneously, and the adjustment of the upper squeeze rollers 54 is more convenient and faster.

As a specific embodiment of the square tube direct squaring extrusion device 5 provided by the present invention, please refer to fig. 2 and fig. 3, the driving structure 573 includes a lifting screw rod disposed on the lifting frame 52 and vertically disposed, a first gear box disposed on the lifting frame 52 and used for driving the lifting screw rod to move axially, and a first power structure for driving the first gear box, and the end of the lifting screw rod is rotatably connected to the sliding plate 572. When the sliding plate 572 needs to be adjusted, the first gear box is driven through the first power structure, the worm gear structure is arranged in the first gear box, the lifting screw rod is driven to move along the axial direction of the lifting screw rod through the first gear box, and therefore the sliding plate 572 is driven to move up and down. Alternatively, the first power structure typically employs an electric motor, and the first gear box is a worm gear box. The drive structure 573 may also employ a hoist.

As a specific embodiment of the square tube direct squaring extrusion device 5 provided by the utility model, please refer to fig. 2 and fig. 3, the quantity of lifting screw and first gear box is two, and two lifting screw set up respectively in the both sides of sliding plate 572, and first power structure sets up between two first gear boxes. The quantity of lifting screw is two to the tip of two lifting screw is rotatable connection respectively in the both sides of sliding block, and two lifting screw all drive through same first power structure and come the motion, can guarantee the synchronization that two sides of sliding block go up and down when the size of sliding block is great, makes the lift of sliding block more convenient.

As a specific embodiment of the square tube direct squaring and extruding apparatus 5 provided by the present invention, please refer to fig. 2 and fig. 3, the second lifting mechanism 58 includes a side roller box 581 slidably disposed on the side roller seat 53 for installing the side pressing roller 55, and an adjusting structure 582 disposed on the side roller seat 53 for driving the side roller box 581 to move up and down. The adjusting structure 582 can adopt the lifting machine or adopt the same structure as the first lifting mechanism 57, the side roller box 581 can move up and down in the side roller seat 53 under the driving of the adjusting structure 582, and the side roller seat 53 is also provided with a third chute for installing the side roller box 581, so that the installation and adjustment of the side roller seat 53 are more convenient and faster.

As a specific embodiment of the square tube production line of the present invention, please refer to fig. 4 and 5, the side squeeze roll stand 8 includes a side press frame 81, a lower roll mechanism 82 disposed on the side press frame 81, two side roll mechanisms 83 disposed on the side press frame 81 and symmetrically disposed above the lower roll mechanism 82, and an upper roll mechanism 84 disposed on the side press frame 81 and disposed above the side roll mechanisms 83. The lower roll mechanism 82, the side roll mechanism 83 and the upper roll mechanism 84 jointly form a rolling cavity for rolling the pipe body, the side roll mechanism 83 can well extrude the side wall when the angle between the side wall and the bottom surface of the pipe body is close to 90 degrees, the problem that the depth of a die is large due to the adoption of the square flat roll frame 6 is avoided, and the manufacturing difficulty of a roll and the processing difficulty of the pipe body are reduced. Meanwhile, the lower roller mechanism 82 rotates, and the lower roller mechanism 82 extrudes the workpiece to be processed together with the upper roller mechanism 84 and the two side roller mechanisms 83 when conveying the workpiece to be processed, so that a basis is provided for subsequent stamping and welding, and the lower roller mechanism is reasonable in design and high in reliability.

As a specific embodiment of the square tube production line provided in the present invention, please refer to fig. 4 and 5, the upper roller mechanism 84 includes a movable mounting beam 841 disposed on the lateral pressure frame 81, a rotatable upper rotating roller 842 disposed on the mounting beam 841, and a pulling structure 843 disposed on the lateral pressure frame 81 for driving the mounting beam 841 to move up and down along the height direction of the lateral pressure frame 81. The upper rotating roll 842 is driven to move up and down by the mounting cross beam 841, the two end parts of the mounting cross beam 841 are arranged on the side pressure rack 81, the height of the mounting cross beam 841 is adjusted by the pulling structure 843, the shaft center of the upper rotating roll 842 can be always kept horizontal when the mounting cross beam 841 is arranged, and the more accurate processing quality of the tube body in rolling is better.

Optionally, the pulling structure 843 includes a first motor, a transmission worm gear, and a driving screw rod, and the driving screw rod is disposed through the transmission worm gear and is connected to the transmission worm gear through a thread. The transmission turbine is provided with a threaded hole which is axially arranged along the transmission turbine and used for accommodating the driving screw rod. The first motor drives the transmission worm to rotate, and because transmission worm wheel and transmission worm mesh, make the worm drive the worm wheel and rotate, drive the drive lead screw and reciprocate in the threaded hole, realize the lift of drive lead screw, the drive lead screw drives installation crossbeam 841 and reciprocates, and installation crossbeam 841 drives last live-rollers 842 and reciprocates, and the design is simple reasonable, and is stable practical easy to maintain.

As a specific embodiment of the square tube production line provided in the present invention, please refer to fig. 4 and 5, the side roller mechanism 83 includes a movable side slider 831 disposed on the side press frame 81, a rotatable side rotation roller 832 disposed on the side slider 831, a pulling screw 833 rotatably disposed on the side press frame 81 and having an end portion connected to the side slider 831, and a power unit 834 disposed on the side press frame 81 and used for driving the pulling screw 833 to rotate, the pulling screw 833 is connected to the side slider 831, and the two side sliders 831 move relatively or oppositely under the driving of the pulling screw 833. The power unit 834 drives the pulling screw rod 833 to rotate, so that the side sliding block 831 moves on the pulling screw, the purpose of transverse adjustment of the side roller mechanism 83 is achieved, the side rotating roller 832 is rotatably arranged on the side sliding block 831, and the side roller mechanism 83 is in the structure, so that space saving is facilitated, and the design is reasonable. Alternatively, power unit 834 is typically driven using an electric motor.

As a specific embodiment of the square tube production line provided by the present invention, please refer to fig. 4 and 5, the lower roller mechanism 82 includes a rotatable rotating shaft 821 disposed on the side press frame 81 and a lower rotating roller 822 sleeved on the rotating shaft 821. One end of the transmission shaft is provided with a half coupling. The half-couplings are connected with the corresponding half-couplings, so that the transmission shaft is connected with the power device, the rotation of the transmission shaft is realized, and the transmission shaft drives the lower rotating roller 822 to rotate, so that the active transmission of workpieces is realized, the design is reasonable, and the reliability is high. Be provided with the bearing between lower rotor 822 and the side pressure frame 81, be favorable to reducing and be provided with the bearing between rotor 822 and the side pressure frame 81, be favorable to reducing the friction between rotor 822 and the side pressure frame 81 and the frictional force between the side pressure frame 81, increase the life of rotor 822 and side pressure machine down, also increase rotor 822 pivoted fluency down, make rotor 822's use more convenient down.

As the utility model provides a concrete implementation of square pipe production line please refer to fig. 4 and 5, goes up rotation roller 842 from both ends to the middle part and to the direction slope of being close to its central axis gradually, and side rotation roller 832 is the round platform shape with lower rotation roller 822, is favorable to making the space that forms the pentagon between each roller, makes the work piece press into the shape of pentagon, and the later stage of being convenient for welds the opening, and reasonable in design is convenient for the shaping.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a square pipe production line which characterized in that: the device comprises a rough forming section, a fine forming section, a closed working section, a welding device and an extruding device, wherein the rough forming section is used for rolling a raw material steel plate into a square pipe with an opening, the fine forming section is used for rolling the roughly formed pipe body to further reduce the width of the opening of the square pipe, the closed working section is used for closing the opening on the pipe body, the welding device is used for welding the opening of the pipe body to enable the pipe body to be a closed rectangle, and the extruding device is used for extruding the pipe body to enable the welding position of the opening of the pipe body to be fixed more; the rough forming section comprises a plurality of squaring flat roll frames which are sequentially arranged along the motion direction of the pipe body and side flat roll frames which are arranged behind the squaring flat roll frames along the motion direction of the pipe body, the fine forming section comprises a plurality of squaring flat roll frames which are sequentially arranged along the motion direction of the pipe body, and the closed working section comprises a plurality of side extrusion roll frames.

2. The square tube production line of claim 1, wherein: the square tube production line further comprises a scraping and welding working section, wherein the side face, far away from the welding device, of the extruding device is used for removing redundant welding slag on the outer wall of the tube body, and the scraping and welding working section comprises a plurality of scraping and welding devices which are sequentially arranged.

3. The square tube production line of claim 2, wherein: the square tube production line further comprises a plurality of supporting roller frames which are arranged between the two squaring flat roller frames or between the squaring flat roller frames and the side extrusion roller frames and used for supporting the tube body.

4. The square pipe production line as claimed in any one of claims 1 to 3, wherein: the extrusion device comprises a base, a lifting frame arranged on the base and positioned on the side surface of the base, and two side roller seats arranged on the base, wherein both the side roller seats can be movably arranged on the base;

5. The square tube production line of claim 4, wherein: the circumference of the two side pressing rollers is provided with accommodating grooves for accommodating the lower carrier roller, the accommodating grooves are formed in the end parts, close to the lower carrier roller, of the side pressing rollers and are arranged along the circumferential direction of the side pressing rollers, and the two accommodating grooves form a cavity for accommodating the lower carrier roller.

6. The square tube production line of claim 5, wherein: the number of the upper squeeze rollers is two, the two upper squeeze rollers are arranged on the lifting rack in an included angle mode, and the two upper squeeze rollers are arranged symmetrically along the central plane of the side pressing rollers.

7. The square pipe production line as claimed in any one of claims 1 to 3, wherein: the side squeeze roll frame comprises a side press frame, a lower roll mechanism arranged on the side press frame, two side roll mechanisms which are symmetrically arranged on the side press frame and are positioned above the lower roll mechanism, and an upper roll mechanism which is arranged on the side press frame and is positioned above the side roll mechanisms.

8. The square tube production line of claim 7, wherein: the upper roll mechanism comprises a mounting cross beam movably arranged on the side press rack, an upper rotating roll rotatably arranged on the mounting cross beam and a pulling structure arranged on the side press rack and used for driving the mounting cross beam to move up and down along the height direction of the side press rack.

9. The square tube production line of claim 7, wherein: the side roller mechanism comprises a side sliding block movably arranged on the side press frame, a side rotating roller rotatably arranged on the side sliding block, a pulling screw rod rotatably arranged on the side press frame and the end part of the pulling screw rod is connected with the side sliding block, and a power unit arranged on the side press frame and used for driving the pulling screw rod to rotate, wherein the pulling screw rod is connected with the side sliding block, and the two side sliding blocks move relatively or oppositely under the driving of the pulling screw rod.

10. The square tube production line of claim 7, wherein: the lower roll mechanism comprises a rotating shaft which is rotatably arranged on the side pressing machine frame and a lower rotating roll which is sleeved on the rotating shaft.