Double roll strip edge straightening device for a pipe welding forming machine

Abstract

The application discloses a double-roller strip steel edge straightening device of a welded pipe forming machine, relates to the technical field of metal plate straightening equipment, and aims to solve the technical problems of single-edge or double-edge upwarping and difficulty in straightening of thick edges and thin middle parts, and comprises a main frame, an edge straightening mechanism, a clamping assembly and a straightening assembly. The edge straightening mechanism, the clamping assembly and the straightening assembly are used to realize accurate straightening of different defective strip steels. The connecting sleeve moving up and down, the conical roller capable of being adjusted in an inclined manner and the combined plate capable of being gathered or unfolded can be used to realize the following functions. The conical roller is used to be matched with the pressure roller to be combined by being inclined upward, and is used to straighten the single-edge or double-edge upwarping defects of the strip steel in a targeted manner. The conical roller is used to be inclined downward, and is used to first flatten the thick edge part, then to uniformly extrude the edge and the middle part after combination, and to be suitable for the strip steel with thick edges and thin middle parts. The sealing cavity is used to be exhausted to drive the blocking piece to move the roller shaft to be combined. The spherical coupling is used to guarantee stable transmission under complex working conditions. The clamping assembly is used to be flexibly adjusted by the combined plate, and is used to avoid damage to the surface of the strip steel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal plate straightening equipment, in particular to a double-roller strip steel edge straightening device of a welded pipe forming machine. BACKGROUND

[0002] In the field of welded pipe forming processing, the strip steel as the core raw material, its edge flatness and thickness uniformity directly determine the welded pipe forming quality. However, in the current strip steel production and pretreatment process, affected by factors such as rolling process deviation, transportation and storage deformation, the strip steel often appears in various forms of defects, mainly including single or double edge upwarping, edge thick and middle thin two typical problems;

[0003] The existing strip steel straightening equipment mostly adopts fixed structure roller shaft assembly. In the face of single or double edge upwarping defects of the strip steel, the fixed roller shaft cannot realize targeted pressure on the upwarping part through the coordinated adjustment of the inclination angle and the pressure, which easily leads to local bending of the straightened strip steel. And for the strip steel with edge thick and middle thin, the existing equipment lacks the step-by-step straightening mechanism of "first flattening the edge thick area, then balanced extrusion of the whole", and direct rolling easily causes excessive deformation of the edge or wrinkles in the middle, which is difficult to meet the requirement of the welded pipe forming on the consistency of the edge thickness of the strip steel;

[0004] In order to ensure that the strip steel does not deviate during straightening, the existing equipment mostly adopts rigid clamping structure (such as fixed clamping plate, limiting block), which fixes the position of the strip steel through forced limiting. Such structure cannot adjust the clamping force and range according to the changes of the width and thickness of the strip steel, and when the strip steel has a small size deviation, the rigid clamping easily produces hard friction with the surface of the strip steel, which leads to surface scratches, indentation and other damages. At the same time, the rigid limiting cannot adapt to the slight deformation of the strip steel during straightening, which easily causes plastic deformation of the edge of the strip steel due to "excessive constraint", reduces the surface quality of the strip steel, increases the workload and cost of the subsequent polishing process. In view of this, we propose a double-roller strip steel edge straightening device of a welded pipe forming machine. SUMMARY

[0005] The purpose of the present application is to provide a double-roller strip steel edge straightening device of a welded pipe forming machine, to solve the technical problems of single or double edge upwarping and edge thick and middle thin straightening difficulty.

[0006] To solve the above technical problems, the present application provides the following technical solutions: a double-roller strip edge straightening device of a welded pipe forming machine, which comprises two main racks with a conveying system, a secondary rack arranged between the two main racks, a plurality of rollers rotatably arranged on the inner walls of the two sides of the secondary rack, an adjusting frame with pneumatic sliding blocks slidably arranged on the top of the secondary rack, an edge straightening mechanism arranged in the adjusting frame, a clamping assembly and a correction assembly, the edge straightening mechanism comprises a plurality of connecting sleeves capable of moving upward or downward, the inner wall of each connecting sleeve is provided with an annular filling groove, each connecting sleeve is rotatably connected with a pressure roller having a hollow structure in the inside, the pressure roller is in communication with the annular filling groove, each pressure roller is sealed and slidably fitted with a baffle in the inside in a symmetrical structure, a sealed cavity is formed between the annular filling groove and the baffle, a spherical coupling is fixedly connected to one side of each baffle, a tapered roller is fixedly connected to one end of each spherical coupling, and a plurality of combination plates are slidably fitted on the surface of each tapered roller in an annular array.

[0007] When straightening the upwardly curved strip, the tapered rollers are inclined upward, the pressure rollers and the tapered rollers rotate, the strip and the combination plates are extruded, the baffles are moved by air suction, and the pressure rollers and the tapered rollers are combined and straightened; when straightening the strip with thick edges and thin middle parts, the tapered rollers are inclined downward, the tapered rollers press the edges of the strip, the baffles are moved by air suction, the spherical couplings apply force, the tapered rollers and the pressure rollers are combined and evenly extruded to straighten the strip, the edge straightening mechanism, the clamping assembly and the correction assembly are cooperated to accurately straighten the strip with different defects; the connecting sleeves that can move up and down, the tapered rollers that can be inclined and adjusted, and the combination plates that can be gathered or expanded are used to combine the pressure rollers by inclining the tapered rollers, to straighten the single edge or double edges of the strip with upwardly curved defects, and to extrude the edges and the middle parts by combining the pressure rollers after pressing the thick edge parts of the strip, to straighten the strip with thick edges and thin middle parts; the sealed cavity is driven by air suction to move the baffles to combine the rollers, the spherical couplings ensure stable transmission under complex working conditions, the clamping assembly avoids damage to the surface of the strip by flexible adjustment of the combination plates, and the straightening adaptability, accuracy and running stability are improved as a whole to meet the requirements of the welded pipe forming on the edge quality of the strip.

[0008] Preferably, heating elements and cooling systems are arranged between the two main racks and the secondary rack.

[0009] Preferably, the edge straightening mechanism further comprises a plurality of main hydraulic rods, the connecting sleeves are fixedly arranged on the output ends of the main hydraulic rods, the main hydraulic rods are linearly arrayed and fixedly connected to the top of the adjusting frame, and the output ends of the main hydraulic rods pass through the adjusting frame, the inside of each baffle is symmetrically sleeved with a transmission ring, and the supporting rods on the spherical couplings are slidably fitted in the inside of the transmission ring.

[0010] Preferably, each conical roller surface is provided with a plurality of movable grooves in annular array, and the combination plate is hinged inside the movable groove, the top of the adjusting frame is fixedly connected with a secondary hydraulic rod in a symmetrical structure, the output end inner wall of each secondary hydraulic rod is rotatably connected with a movable ring, and the movable ring is hinged with the supporting rod on the conical roller.

[0011] Preferably, the adjusting frame is fixedly connected with a support plate on one side, a plurality of belt pulleys are rotatably connected in the hole on the support plate, a motor seat is arranged below the support plate and is in transmission connection with the belt pulley, a plurality of belt pulleys are in transmission connection through a belt, and the belt pulley and the end portion of the supporting rod on the conical roller are fixedly connected with the telescopic hinge rod.

[0012] Preferably, the clamping assembly comprises a plurality of rebound cylinders, each rebound cylinder is fixedly connected to the inner wall on one side of the conical roller, each rebound cylinder side surface is provided with a plurality of rebound grooves in annular array, and the combination plate passes through the inside of the rebound groove.

[0013] Preferably, the rebound cylinder is sleeved with a volute spring, and the volute spring is elastically matched with the combination plate.

[0014] Preferably, the surface of the supporting rod on the spherical coupling is slidably matched with a fixing cylinder, and the end surface of the fixing cylinder is arranged with a spout.

[0015] Preferably, the correction assembly comprises a plurality of fixed rings, each fixed ring is sleeved on the inner wall of the conical roller, and the fixed ring is located at the edge of the conical roller along the mouth, and the supporting rod on the spherical coupling passes through the fixed ring, each fixed ring is provided with a plurality of hole grooves in annular array on one side, each hole groove is hinged with an arc-shaped rod on the inner wall on both sides, and the arc-shaped rod is matched with the spout.

[0016] Preferably, each hole groove is fixedly connected with a first spring on one side inner wall, and the first spring is fixedly connected with the arc-shaped rod, and the inner wall of each pressure roller is fixedly connected with a plurality of stop blocks in a symmetrical structure, and the stop blocks are in movable contact with the arc-shaped rods.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The edge straightening mechanism, the clamping assembly and the correcting assembly cooperate to realize accurate straightening of different defective strip steels; the connecting sleeve can move up and down, the conical roller can be adjusted in inclination, and the combination plate can be gathered or spread out; the conical roller can be combined with the pressure roller by tilting up to straighten the single or double edge of the strip steel, the conical roller can be tilted down to flatten the thick edge first, then the edge and the middle part are balanced and extruded after combination to adapt to the strip steel with thick edge and thin middle part; the sealing cavity is driven by air extraction to move the blocking piece to realize the combination of the roller shaft, the spherical coupling ensures stable transmission under complex working conditions, and the clamping assembly avoids damage to the surface of the strip steel through flexible adjustment of the combination plate, thereby improving the straightening adaptability, accuracy and operation stability as a whole, and meeting the requirements of the edge quality of the strip steel for pipe forming.

[0019] 2. The edge straightening mechanism as a core working component has strong adaptability and high straightening accuracy; on the one hand, the height of the pressure roller is adjusted by the main hydraulic rod, and the inclination direction of the conical roller is controlled by the auxiliary hydraulic rod, so that two types of strip steel defects can be processed: for the single or double edge of the strip steel, the conical roller is tilted upward to extrude the edge, and then the sealing cavity is extracted and the spherical coupling is driven to realize the conversion of the conical roller into the cylindrical roller shaft, and the whole process is accurately flattened; for the strip steel with thick edge and thin middle part, the conical roller is tilted downward to flatten the thick edge first, and then the cylindrical roller shaft is combined to balance and extrude, thereby ensuring the overall flatness of the strip steel. On the other hand, the combination plate can be partially gathered or spread out; when spread out, the diameter of the pressure roller is consistent, and when gathered, the combination plate is attached to the surface of the strip steel, which, combined with the curved surface design of the conical roller, can avoid leaving marks during straightening; the spherical coupling can also compensate for a large range of shaft displacement, and the telescopic hinge can stably transmit power, thereby adapting to complex working conditions and further improving the straightening accuracy and stability.

[0020] 3. The present application provides key protection for straightening quality through elastic adaptation and structural limiting. The volute spring in the rebound cylinder elastically cooperates with the combination plate, so that the combination plate can be gathered inward in sequence under pressure, and after the gathering of the previous combination plate, the next combination plate has a no-load adjustment interval, which can be adjusted and completely attached to the surface of the strip steel in this interval to avoid scratches on the strip steel caused by the force of the volute spring. At the same time, the fixed cylinder can realize the "fixing" and "release" of the combination plate by moving: when moving to the rebound cylinder, the movable slot is blocked to fix the posture of the combination plate to stabilize the straightening; when moving in the opposite direction, the combination plate is released to adapt to the strip steel, which not only ensures the stability of the combination plate, but also avoids defects on the surface of the strip steel, thereby improving the quality of raw materials.

[0021] 4、The application significantly improves the operation reliability of the device through axial correction and connection reinforcement. When the fixed cylinder moves to one side of the fixed ring, the shovel opening drives the arc-shaped rod to rotate to form a circular arc structure, which can correct the axial of the pressure roller and the conical roller on one hand, ensure the coaxiality of the two, and avoid uneven stress caused by misalignment during straightening; on the other hand, it can isolate the two when the roller shaft is separated, reduce friction loss, and prolong the service life of the components. When the fixed cylinder moves to the rebound cylinder, the first spring pulls the arc-shaped rod and the stopper on the inner wall of the pressure roller to be connected, which can enhance the connection strength of the pressure roller and the conical roller, avoid straightening deviation caused by loose roller shaft during straightening, ensure the stability of the device during continuous operation, and reduce maintenance cost and failure risk. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an edge straightening mechanism structure section view of the application.

[0023] Figure 2 It is an overall structure section view of the application.

[0024] Figure 3 It is a three-dimensional structure schematic view of the application.

[0025] Figure 4 It is an adjustment frame three-dimensional exploded structure schematic view of the application.

[0026] Figure 5 It is a three-dimensional local structure section view of the application, showing the use position of the pressure roller.

[0027] Figure 6 It is an edge straightening mechanism three-dimensional structure section view of the application.

[0028] Figure 7 It is an edge straightening mechanism three-dimensional local structure schematic view of the application.

[0029] Figure 8 It is a three-dimensional structure section view of the clamping assembly of the application.

[0030] Figure 9 It is a three-dimensional exploded structure schematic view of the clamping assembly of the application.

[0031] Figure 10 It is a three-dimensional structure schematic view of the clamping assembly of the application, showing the three-dimensional structure of the spiral spring.

[0032] Figure 11 It is a combination plate structure section view of the application.

[0033] Figure 12 It is a combination plate axial rotation use state structure section view of the application.

[0034] Figure 13The schematic view of the cross section of the scroll spring structure of the present application is shown to illustrate the use state of the scroll spring.

[0035] Label explanation in the figure: 1, main frame; 11, sub-frame; 111, roller; 112, heating element; 113, cooling system; 2, adjusting frame; 3, edge straightening mechanism; 31, main hydraulic rod; 32, connecting sleeve; 321, filling groove; 33, pressure roller; 34, blocking piece; 35, spherical coupling; 36, transmission ring; 37, conical roller; 371, movable groove; 38, combined plate; 39, sub-hydraulic rod; 391, movable ring; 310, support plate; 311, pulley; 312, motor base; 313, hinge rod; 4, clamping assembly; 41, rebound cylinder; 411, rebound groove; 42, scroll spring; 43, fixed cylinder; 431, scoop; 5, correction assembly; 51, fixed ring; 511, hole groove; 52, arc-shaped rod; 53, first spring; 54, stop block. DETAILED DESCRIPTION

[0036] As shown in Figures 1-9 and Figures 11-12 , the double-roller strip edge straightening device of the pipe welding forming machine of the present embodiment comprises two main frames 1 with a conveying system, a sub-frame 11 arranged between the two main frames 1, a plurality of rollers 111 rotatably arranged in the inner walls of the two sides of the sub-frame 11, an adjusting frame 2 with a pneumatic sliding block slidingly arranged on the top of the sub-frame 11, an edge straightening mechanism 3 arranged inside the adjusting frame 2, a clamping assembly 4, and a correction assembly 5.

[0037] It is worth noting that the inner walls of the two sides of the two main frames 1 are symmetrically arranged with a plurality of roller shafts, and are equipped with independent drive motors, belts and other transmission components.

[0038] Heating elements 112 and cooling systems 113 are arranged between the two main frames 1 and the sub-frame 11.

[0039] It is worth noting that the heating elements 112 and the cooling systems 113 are both conventional technologies, and will not be described in detail here. The heating elements 112 can heat the strip steel to control the heating temperature below the crystallization temperature of the strip steel and significantly reduce the yield strength in the interval, so as to reduce the edge hardness and yield strength of the strip steel; the cooling system 113 can quickly cool the edge temperature of the strip steel to room temperature or a stable temperature interval after the edge metal is in a plastic deformation state after heating and straightening.

[0040] The edge straightening mechanism 3 comprises a plurality of main hydraulic rods 31 fixedly connected in a linear array on the top of the adjusting frame 2, and the output ends of the main hydraulic rods 31 penetrate through the adjusting frame 2, and each output end of the main hydraulic rod 31 is fixedly connected with a connecting sleeve 32, and an annular filling groove 321 is formed in the inner wall of the connecting sleeve 32, and each connecting sleeve 32 is rotatably connected with a pressure roller 33 with a hollow structure in the inside, the pressure roller 33 is composed of two main split components, in a butt-joint or partially nested structure, and the pressure roller 33 is in communication with the annular filling groove 321, and each pressure roller 33 is sealed and slidably fitted with a baffle 34 in a symmetrical structure in the inside, and a sealed cavity is formed between the annular filling groove 321 and the baffle 34, each baffle 34 is fixedly connected with a spherical coupling 35 on one side, and each baffle 34 is fitted with a transmission ring 36 in a symmetrical structure in the inside, and the support rod on the spherical coupling 35 is slidably fitted in the transmission ring 36, and each spherical coupling 35 is fixedly connected with a conical roller 37 at the transmission end, and a plurality of movable grooves 371 are formed in the annular array on the surface of each conical roller 37, and each movable groove 371 is hinged with a combined plate 38 with an arc surface on the inner walls on both sides, and a secondary hydraulic rod 39 is fixedly connected in a symmetrical structure on the top of the adjusting frame 2, and a movable ring 391 is rotatably arranged on the inner wall of the output end of each secondary hydraulic rod 39, and the movable ring 391 is hinged with the support rod on the conical roller 37, and a supporting plate 310 is fixedly connected on one side of the adjusting frame 2, a plurality of belt pulleys 311 are rotatably connected in the holes in the supporting plate 310, an electric motor base 312 is arranged below the supporting plate 310, and the electric motor base 312 is in transmission connection with the belt pulleys 311, the belt pulleys 311 are in transmission connection through a belt, and the hinged rods 313 with the telescopic function are fixedly connected between the belt pulleys 311 and the end portions of the support rods on the conical roller 37.

[0041] It is worth noting that the spherical coupling 35 is a conventional technology, which will not be described in detail here, and it can be universally transmitted, and in this embodiment, it can compensate for axial, radial and angular displacement in a larger range relative to the cross coupling, and can adapt to more complex working conditions, and the transmission parts of the spherical coupling 35 are spherical, which avoids contacting other components in a stationary state when transmitting in different axial directions, affecting the stable working environment. At the same time, a plurality of protrusions are arranged on the surface of the support rod of the spherical coupling 35 and are matched with the shape of the inner wall of the transmission ring 36, so that the support rod of the spherical coupling 35 slides in the transmission ring 36.

[0042] As in this embodiment, Figures 11-12As shown, the end of the combined plate 38 abuts against the inner wall of one side of the movable groove 371, and the combined plate 38 is limited to only rotate axially into the conical roller 37; the plurality of combined plates 38 can be partially gathered or unfolded, and when unfolded, the plurality of combined plates 38 form a circular cylindrical shape, and the diameter of the circular cylindrical shape is the same as the diameter of the pressure roller 33, so that it can be straightened without traces; when partially gathered, the combined plate 38 located at the bottom of the conical roller 37 is in contact with the surface of the strip steel to straighten the surface, and through the curved surface of the conical roller 37, the traceless flattening can be realized.

[0043] Specifically, when straightening the single or double upwarp of the strip steel, the height position of the pressure roller 33 is adjusted through the main hydraulic rod 31 first, and then the conical roller 37 is tilted upward by the auxiliary hydraulic rod 39 to make the combined plate 38 close to the strip steel in close contact and extrusion, the pressure roller 33 and the conical roller 37 rotate, and the gas in the sealed cavity is extracted, the baffle 34 moves to the middle part in the pressure roller 33, and the spherical coupling 35 transmission part applies force to the conical roller 37 to make the conical roller 37 transform from the tilted upward state to a cylindrical roller shaft to straighten the strip steel with upwarp; when straightening the edge of the strip steel with thicker edge and thinner middle part, the height position of the pressure roller 33 is adjusted through the main hydraulic rod 31 first, and then the conical roller 37 is tilted downward by the auxiliary hydraulic rod 39 to make the conical roller 37 contact with the edge of the strip steel, and the combined plate 38 close to the strip steel extrudes and contacts, the conical roller 37 rotates and applies pressure to flatten the strip steel with thicker edge, and then the gas in the sealed cavity is extracted, the baffle 34 moves to the middle part in the pressure roller 33, and the spherical coupling 35 transmission part applies force to the conical roller 37 to make the conical roller 37 transform from the tilted downward state to a cylindrical roller shaft to evenly extrude and straighten the middle part and the edge;

[0044] The edge straightening mechanism 3 has strong adaptability and high straightening precision; on the one hand, the height of the pressure roller 33 is adjusted by the main hydraulic rod 31, and the tilt direction of the conical roller 37 is controlled by the auxiliary hydraulic rod 39, so that the two types of strip steel defects can be processed: for the single or double upwarp strip steel, the conical roller 37 is tilted upward to extrude the upwarp edge in cooperation with the combined plate 38, and then the sealed cavity is exhausted and the spherical coupling 35 is driven to realize the transformation of the conical roller 37 to a cylindrical roller shaft, and the whole process is accurately flattened; for the strip steel with thicker edge and thinner middle part, the conical roller 37 is tilted downward to flatten the thick edge first, and then the cylindrical roller shaft is combined to evenly extrude, so as to ensure the overall flatness of the strip steel. On the other hand, the combined plate 38 can be partially gathered or unfolded; when unfolded, it is consistent with the diameter of the pressure roller 33, and when gathered, it is attached to the surface of the strip steel, combined with the curved surface design of the conical roller 37, which can avoid leaving traces during straightening; the spherical coupling 35 can also compensate for a wide range of shaft displacement, and cooperate with the telescopic hinge rod 313 to stably transmit power, adapt to complex working conditions, and further improve the straightening precision and stability.

[0045] As Figures 8-10 and Figure 13 shown, the clamping assembly 4 includes a plurality of rebound cylinders 41, each of which is fixedly connected to the inner wall on one side of the conical roller 37, the side surface of each rebound cylinder 41 is annularly arrayed with a plurality of rebound grooves 411, the combination plate 38 passes through the inside of the rebound grooves 411, a volute spring 42 is sleeved in the rebound cylinder 41, and the volute spring 42 is elastically matched with the combination plate 38, the surface of the supporting rod on the spherical coupler 35 is slidingly matched with a fixed cylinder 43, and the end surface of the fixed cylinder 43 is arranged with a spout 431.

[0046] It is worth noting that the volute spring 42 is a conventional technology, and will not be described in detail here, the volute spring 42 is elastically matched with the combination plate 38, and a plurality of combination plates 38 sequentially bear pressure and converge inwardly, wherein, after any one combination plate 38 converges inwardly, the combination plate 38 has a larger area that is not subject to the force, and then converges inwardly in contact with the volute spring 42, wherein, when the combination plate 38 is in the area that is not subject to the force, the combination plate 38 is in contact with the surface of the strip and is adjusted, so that the combination plate 38 is completely attached to the surface of the strip when bearing the pressure of the conical roller 37, avoiding that the combination plate 38 leaves scratches on the surface of the strip when contacting the strip due to the force applied by the volute spring 42 to the combination plate 38.

[0047] Specifically, when the fixed cylinder 43 moves to the surface of the rebound cylinder 41 in the conical roller 37, the fixed cylinder 43 can block the movable groove 371, so that the plurality of combination plates 38 are fixed; when the fixed cylinder 43 moves in the opposite direction, the combination plate 38 can protrude from the movable groove 371.

[0048] The present application provides key protection for straightening quality through elastic matching and structural limiting. The volute spring 42 in the rebound cylinder 41 is elastically matched with the combination plate 38, so that the combination plate 38 can sequentially bear pressure and converge inwardly, and after the previous combination plate 38 converges, the next combination plate 38 has a no-force adjustment interval, can independently adjust and completely attach to the surface of the strip in the interval, and avoid that the force of the volute spring 42 causes the corner of the combination plate 38 to scratch the strip. At the same time, the fixed cylinder 43 can realize "fixing" and "releasing" of the combination plate 38 by moving: moving to the rebound cylinder 41 to block the movable groove 371, fixing the posture of the combination plate 38 to stabilize the straightening; moving in the opposite direction to release the combination plate 38, so that it can flexibly converge to adapt to the strip, which not only ensures the working stability of the combination plate 38, but also avoids defects on the surface of the strip, and improves the quality of raw materials.

[0049] As Figure 1 , Figure 6 and Figure 10As shown, the correction assembly 5 comprises a plurality of fixed rings 51, each of which is sleeved on the inner wall of the conical roller 37 and located at the edge of the mouth of the conical roller 37, and the support rod on the spherical coupling 35 passes through the fixed ring 51, each fixed ring 51 is provided with a plurality of hole grooves 511 in an annular array on one side, and an arc-shaped rod 52 is hinged on the inner wall of each hole groove 511 on both sides, and the arc-shaped rod 52 is matched with the shovel 431, and a first spring 53 is fixedly connected to the inner wall of each hole groove 511 on one side, and the first spring 53 is fixedly connected with the arc-shaped rod 52, and a plurality of stop blocks 54 are fixedly connected to the inner wall of each pressure roller 33 in a symmetrical structure, and the stop blocks 54 are in movable contact with the arc-shaped rods 52.

[0050] Specifically, when the fixed cylinder 43 moves to one side of the fixed ring 51, the shovel 431 exerts a force on the end of the arc-shaped rod 52, causing the arc-shaped rod 52 to rotate axially, and then the plurality of arc-shaped rods 52 form a circular arc, which is used for axial correction of the pressure roller 33 and the conical roller 37, and separation of the pressure roller 33 and the conical roller 37 to avoid friction between them; when the fixed cylinder 43 moves to the surface of the rebound cylinder 41, the first spring 53 exerts a force on the arc-shaped rod 52, causing the arc-shaped rod 52 to be clamped with the stop block 54, which can enhance the connection between the pressure roller 33 and the conical roller 37.

[0051] The present application significantly improves the reliability of the device by axial correction and connection strengthening. When the fixed cylinder 43 moves to one side of the fixed ring 51, the shovel 431 drives the arc-shaped rod 52 to rotate to form a circular arc structure, which can correct the pressure roller 33 and the conical roller 37 axially, ensure the coaxiality of the two, and avoid uneven stress caused by misalignment during straightening; on the other hand, the two can be isolated when the roller shaft is separated, reducing friction loss and prolonging the service life of the components. When the fixed cylinder 43 moves to the rebound cylinder 41, the first spring 53 pulls the arc-shaped rod 52 to clamp the stop block 54 on the inner wall of the pressure roller 33, which can enhance the connection strength of the pressure roller 33 and the conical roller 37, avoid straightening deviation caused by loose roller shaft during straightening, ensure the stability of the device during continuous operation, and reduce maintenance cost and failure risk.

[0052] Working principle: the embodiment provides a double roll strip edge straightening device of a welded pipe forming machine, which can straighten the single edge or double edges of the strip upwardly; first, the external control system moves the adjusting frame 2 to one side, and the main hydraulic rod 31 and the auxiliary hydraulic rod 39 move the pressure roller 33 and the conical roller 37 as a whole upwardly, so that the pressure roller 33 is parallel to the roller 111 axially, then the auxiliary hydraulic rod 39 applies force to the conical roller 37, so that the conical roller 37 is inclined upwardly, wherein the conical roller 37 pulls the spherical coupling 35 to move to one side inside the pressure roller 33, the baffle 34 moves inside the pressure roller 33 to form a negative pressure state, the sealing cavity is filled with gas through the gas supply system, and the filling of the gas is stopped after the gas pressure is normal, meanwhile, in the inclined state of the conical roller 37, the fixed cylinder 43 is moved to separate from and break contact with the plurality of combined plates 38 through the pneumatic slider, so that the plurality of combined plates 38 can be locally gathered, the combined plate 38 close to the strip is in contact with the surface of the strip and applies pressure, then the motor base 312 drives the belt pulley 311 to rotate through the external circuit mechanism, and the conical roller 37 is rotated through the belt and the hinge rod 313, wherein the conical roller 37 drives the pressure roller 33 and the other conical roller 37 to rotate through the spherical coupling 35, so as to perform flattening work on the edge of the strip, and the sealing cavity is separated from the gas through the external gas supply system, so that the baffle 34 moves to the middle part inside the pressure roller 33, and the conical roller 37 is moved through the spherical coupling 35, so that the conical roller 37 can be converted from the inclined state to the horizontal state, and the edge of the strip is flattened in the whole process, however, in use, the inclination angles of the conical rollers 37 are different, and each conical roller 37 adapts to the angle of the current station to realize accurate and stable flattening treatment;

[0053] In the edge straightening of the strip with thicker edges and thinner middle part: the conical roller 37 is inclined downwardly through the auxiliary hydraulic rod 39, the conical roller 37 pulls the spherical coupling 35 to move to one side inside the pressure roller 33, the baffle 34 moves inside the pressure roller 33 to form a negative pressure state, the sealing cavity is filled with gas through the gas supply system, and the filling of the gas is stopped after the gas pressure is normal, meanwhile, in the inclined state of the conical roller 37, the plurality of combined plates 38 can be locally gathered and in contact with the edge of the strip, the combined plate 38 close to the strip is in contact with the edge of the strip, the conical roller 37 is rotated and applies pressure, so as to flatten the strip with thicker edges, so that the edge of the strip is extruded to the middle part, then the gas in the sealing cavity is extracted, the baffle 34 moves to the middle part inside the pressure roller 33, the spherical coupling 35 applies force to the conical roller 37 through the transmission part, the conical roller 37 is combined with the pressure roller 33, and the middle part and the edge are balanced and extruded and straightened, wherein in the combining process, the fixed cylinder 43 moves to one side of the fixed ring 51, the shovel 431 applies force to the end of the arc-shaped rod 52, so that the arc-shaped rod 52 is axially rotated, and then the plurality of arc-shaped rods 52 form a circular arc, and the arc-shaped rod 52 can guide the moving direction of the conical roller 37 in the combining process.

[0054] The embodiments disclosed herein are to be considered as illustrative and not restrictive, and the scope of the application is indicated by the appended claims, along with their full scope of equivalents, and is intended to cover any and all appropriate modifications and variations made to the embodiments using the principles of the application.

Claims

1. A double roll strip edge straightening device of a pipe welding forming machine, comprising two main frames (1) with a conveying system, a sub-frame (11) arranged between the two main frames (1), a plurality of rollers (111) arranged on the inner walls of both sides of the sub-frame (11), an adjusting frame (2) slidingly arranged on the top of the sub-frame (11), an edge straightening mechanism (3) arranged in the adjusting frame (2), a clamping assembly (4) and a correction assembly (5), characterized in that, The edge straightening mechanism (3) comprises a plurality of connecting sleeves (32) capable of moving upward or downward, an annular filling groove (321) is formed in the inner wall of the connecting sleeve (32), a pressure roller (33) with a hollow structure is rotationally connected in the connecting sleeve (32), the pressure roller (33) is in communication with the annular filling groove (321), a sealing sliding adapter with a baffle (34) is symmetrically arranged in the pressure roller (33), a sealed cavity is formed between the annular filling groove (321) and the baffle (34), a spherical coupling (35) is fixedly connected to one side of each baffle (34), a tapered roller (37) is fixedly connected to one end of each spherical coupling (35), and a plurality of combination plates (38) are slidingly adapted to the surface of each tapered roller (37) in an annular array. When the upturned strip steel is straightened, the tapered roller (37) is tilted upward, the pressure roller (33) and the tapered roller (37) rotate, the strip steel and the combination plate (38) are extruded, the baffle (34) is moved by air suction, and the pressure roller (33) and the tapered roller (37) are combined and straightened; when the strip steel with thick edges and thin middle part is straightened, the tapered roller (37) is tilted downward, the strip steel edge is pressed and flattened, the baffle (34) is moved by air suction, the spherical coupling (35) is forced, and the tapered roller (37) and the pressure roller (33) are combined and balanced extrusion.

2. A double roll strip edge straightening device for a pipe welding forming machine as claimed in claim 1, wherein, Heating elements (112) and cooling systems (113) are arranged between the two main frames (1) and the auxiliary frame (11).

3. A double roll strip edge straightening device for a pipe mill as defined in claim 2 wherein, The edge straightening mechanism (3) further comprises a plurality of main hydraulic rods (31), and the connecting sleeve (32) is fixedly arranged at the output end of the main hydraulic rod (31). The main hydraulic rods (31) are linearly arrayed and fixedly connected to the top of the adjusting frame (2), and the output end of the main hydraulic rod (31) penetrates the adjusting frame (2). A transmission ring (36) is symmetrically sleeved in the baffle (34), and the support rod on the spherical coupling (35) is slidingly adapted in the transmission ring (36).

4. A double roll strip edge straightening device for a pipe welding and forming machine as defined in claim 3 wherein, A plurality of movable grooves (371) are formed in the surface of each tapered roller (37) in an annular array, and the combination plate (38) is hinged in the movable groove (371). The top of the adjusting frame (2) is fixedly connected with a plurality of auxiliary hydraulic rods (39) in a symmetrical structure. A movable ring (391) is rotationally arranged in the inner wall of the output end of each auxiliary hydraulic rod (39), and the movable ring (391) is hinged with the support rod on the tapered roller (37).

5. A double roll strip edge straightening device for a pipe and tube forming machine as defined in claim 4 wherein, A support plate (310) is fixedly connected to one side of the adjusting frame (2). A plurality of belt pulleys (311) are rotationally connected in the holes of the support plate (310). A motor base (312) is arranged below the support plate (310), and the motor base (312) is in transmission connection with the belt pulleys (311). The belt pulleys (311) are in transmission connection through a belt. The hinged rods (313) with telescopic function are fixedly connected between the belt pulleys (311) and the end portions of the support rods on the tapered rollers (37).

6. A double roll strip edge straightening device for a pipe welding and forming machine as defined in claim 5 wherein, The engaging assembly (4) comprises a plurality of rebound cylinders (41), the rebound cylinders (41) are fixedly connected to the inner wall of one side of the conical roller (37), the side surface of each rebound cylinder (41) is provided with a plurality of rebound grooves (411) in annular array, and the combination plate (38) passes through the inside of the rebound grooves (411).

7. A double roll strip edge straightening device for a pipe and tube forming machine as defined in claim 6 wherein, The rebound cylinder (41) is sleeved with a volute spring (42), and the volute spring (42) is elastically matched with the combination plate (38).

8. A double roll strip edge straightening device for a pipe welding and forming machine as defined in claim 7 wherein, The surface of the supporting rod on the spherical shaft coupling (35) is slidably matched with a fixing cylinder (43), and the end surface of the fixing cylinder (43) is provided with a spout (431).

9. A double roll strip edge straightening device for a pipe welding and forming machine as defined in claim 8 wherein, The correcting assembly (5) comprises a plurality of fixing rings (51), the fixing rings (51) are sleeved on the inner wall of the conical roller (37), the fixing ring (51) is located at the edge of the conical roller (37), the supporting rod on the spherical shaft coupling (35) passes through the fixing ring (51), the side of each fixing ring (51) is provided with a plurality of hole grooves (511) in annular array, the inner wall of each hole groove (511) is hingedly connected with an arc-shaped rod (52), and the arc-shaped rod (52) is matched with the spout (431).

10. A double roll strip edge straightening device for a pipe and tube forming machine as defined in claim 9 wherein, The inner wall of each hole groove (511) is fixedly connected with a first spring (53), and the first spring (53) is fixedly connected with the arc-shaped rod (52), the inner wall of each pressure roller (33) is fixedly connected with a plurality of stop blocks (54) in a symmetrical structure, and the stop blocks (54) are in movable contact with the arc-shaped rod (52).

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