A reinforcing bar straightening device

Abstract

The application belongs to the technical field of steel bars, and discloses a steel bar straightening device, which comprises a straightening assembly and a feeding assembly. The straightening assembly comprises a mounting frame, an upper mounting plate, a lower mounting plate, an upper hydraulic cylinder, a pressing frame, a driving assembly, a lower hydraulic cylinder and a lifting frame. Two horizontally arranged pressing rollers are rotatably arranged in the pressing frame. A plurality of annular pressing grooves are formed on the pressing rollers at intervals. Two lifting rollers are rotatably arranged in the lifting frame corresponding to the two pressing rollers. A plurality of annular lifting grooves are formed on the lifting rollers at intervals. A fixing frame is arranged between the pressing frame and the lifting frame in the mounting frame. A pulling unit is slidably arranged on the fixing frame. The feeding assembly is used for placing steel bars. The pulling unit slides along the fixing frame, can pull the end of the steel bar, assists the steel bar to continuously pass through the straightening area, reduces manual intervention, improves the straightening efficiency and reduces the manual operation strength.

Description

Technical Field

[0001] This utility model relates to the field of steel bar technology, and in particular to a steel bar straightening device. Background Technology

[0002] Steel bars refer to steel used in reinforced concrete and prestressed reinforced concrete, and are the core load-bearing materials in construction projects. Their cross-section is mostly circular, but some special specifications use a square design with rounded corners to adapt to the mechanical requirements of different construction scenarios.

[0003] In the building materials trade and logistics sector, steel bars are mostly stored in warehouses in the form of coils. To meet the actual needs of subsequent construction sites, the steel bar coils need to be straightened before being cut to the specified length. However, current mainstream steel bar straightening devices often require workers to manually pull the steel bars through multiple sets of rollers, which is quite inconvenient. Utility Model Content

[0004] To solve the above problems, this utility model provides a rebar straightening device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a rebar straightening device, comprising a straightening assembly and a feeding assembly arranged at intervals, wherein the straightening assembly includes a mounting frame, an upper mounting plate and a lower mounting plate are vertically spaced on the mounting frame, an upper hydraulic cylinder is provided on the upper mounting plate, the piston rod of the upper hydraulic cylinder passes downward through the upper mounting plate and is provided at the end of a lower pressure frame, two horizontally arranged lower pressure rollers are rotatably arranged inside the lower pressure frame, the lower pressure rollers are provided with a plurality of annular lower pressure grooves at intervals, and a drive assembly is also provided on the lower pressure frame to drive the two lower pressure rollers to rotate synchronously. The component includes a lower hydraulic cylinder at the bottom of the lower mounting plate, the piston rod of which passes upward through the lower mounting plate and is provided at the end of the lower mounting plate. Two lifting rollers are rotatably arranged inside the lifting frame corresponding to the two lower pressure rollers. Several annular lifting grooves are spaced apart on the lifting rollers. A fixing frame is provided inside the mounting frame between the lower pressure frame and the lifting frame. A pulling unit for pulling the end of the steel bar is slidably arranged on the fixing frame along the direction perpendicular to the roller core of the lower pressure roller. The feeding assembly includes a base plate and several rotating truncated cones horizontally rotatably arranged on the base plate. A central frame is provided in the middle of the top surface of the rotating truncated cones.

[0006] By adopting the above technical solution, a straightening component and a feeding component are set up. The rebar coil is placed on a central frame, which can center the coiled rebar, preventing it from scattering during feeding and ensuring the stability and continuity of the feeding process. The rotating platform can rotate freely during the rebar feeding process, avoiding additional stress caused by torsion during feeding. The pulling unit slides along the fixed frame, which can pull the ends of the rebar, assisting the rebar to continuously pass through the straightening area, reducing manual intervention, improving straightening efficiency, and reducing the intensity of manual operation. The upper hydraulic cylinder drives the lower pressure frame, and the lower hydraulic cylinder drives the lifting frame, which drives the lower pressure roller and the lifting roller to move up and down. The distance between the rollers can be adjusted according to the diameter of the rebar. With the cooperation of the annular lower pressure groove on the lower pressure roller and the annular lifting groove on the lifting roller, the rebar can be stably clamped and straightened, preventing the rebar from shifting during the straightening process. The drive component drives the two lower pressure rollers to rotate synchronously, providing feeding power for the rebar.

[0007] Furthermore, two upward straightening rollers are rotatably arranged on the lower pressure frame between the two lower pressure rollers, and the upward straightening rollers are parallel to the lower pressure rollers. Two downward straightening rollers are rotatably arranged on the lifting frame between the two lifting rollers, and the downward straightening rollers are parallel to the lifting rollers. Both the upward straightening rollers and the downward straightening rollers are provided with annular straightening grooves spaced apart, and the annular straightening grooves correspond one-to-one with the annular lower pressure grooves. The upward straightening rollers and the downward straightening rollers are staggered in the direction of steel bar feeding.

[0008] By adopting the above technical solution, an upper straightening roller and a lower straightening roller are set up, and the upper straightening roller and the lower straightening roller are arranged alternately in the feeding direction to form an alternating extrusion. When the steel bar passes through, it needs to pass through multiple extrusions and guidances of the lower pressure roller, the upper straightening roller, the lower straightening roller and the lifting roller in sequence, which can further eliminate the bending stress of the steel bar. Compared with the structure that relies only on the lower pressure roller and the lifting roller, the straightening accuracy is significantly improved and the residual curvature of the steel bar after straightening is reduced.

[0009] Furthermore, the drive assembly includes a first motor base mounted on the lower pressure frame, a drive motor mounted on the first motor base, a first drive sprocket mounted on the output shaft of the drive motor, one end of the lower pressure roller passing through the lower pressure frame and fixedly fitted with a first driven sprocket, the first drive sprocket being connected to two first driven sprockets via a first chain, and two first tension sprockets rotatably mounted on the lower pressure frame, the first tension sprockets engaging with the first chain in a tensioning engagement.

[0010] By adopting the above technical solution, a drive motor is set up, which drives the first active sprocket, and drives the two first driven sprockets to rotate through the first chain, so as to realize the synchronous rotation of the two lower pressure rollers.

[0011] Furthermore, the fixing frame includes two grooves on the mounting frame located on the outer sides of the lower pressure frame and the lifting frame, with the length direction of the grooves perpendicular to the roller core direction of the lower pressure roller. A second threaded rod with the length direction of the groove is rotatably arranged inside the groove, and a nut slider is helically arranged on the second threaded rod. The nut slider is slidably engaged with the groove. The two sides of the pulling unit are respectively connected to the two nut sliders. One end of the second threaded rod passes through the groove and is provided with a second driven sprocket. A second motor base is provided on the mounting frame, and a power motor is provided on the second motor base. The output shaft of the power motor passes through the first motor base and is provided with a second driving sprocket. The second driving sprocket is connected to the two second driven sprockets through a second chain. A second tensioning sprocket is also horizontally rotatably arranged on the mounting frame below the second driving sprocket, and the second tensioning sprocket is engaged with the second chain for tensioning.

[0012] By adopting the above technical solution, a power motor, a second drive sprocket, and a second tension sprocket are set up. The power motor drives the second drive sprocket to rotate, which in turn drives the two second driven sprockets to rotate through the second chain, thereby causing the two second threaded rods to rotate synchronously, driving the nut slider to drive the pulling unit to slide smoothly along the fixed frame.

[0013] Furthermore, the pulling unit includes a lower clamping plate connected to two nut sliders at both ends. Two vertical rods are spaced apart on the lower clamping plate, and an upper clamping plate is slidably mounted on the two vertical rods. The upper and lower clamping plates are each provided with a number of clamping grooves, which correspond one-to-one with the annular pressing grooves. A third threaded rod is rotatably mounted on the lower clamping plate, and a third threaded hole is provided on the upper clamping plate and helically connected to the third threaded rod. A handle is provided at the upper end of the third threaded rod.

[0014] By adopting the above technical solution, a vertical rod and a third threaded rod are set up. Rotating the third threaded rod can drive the upper clamping plate to move up and down, thereby clamping the end of the reinforcing bar. The clamping grooves on the clamping plate correspond one-to-one with the annular downward pressing groove, which can clamp reinforcing bars of different diameters, avoid the reinforcing bars from shifting during clamping, and ensure the stability of the reinforcing bars during pulling.

[0015] Furthermore, an installation frame is provided on the side of the mounting frame near the material feeding assembly. A lifting seat is vertically slidably arranged inside the installation frame. Guide rollers are rotatably arranged on both the lifting seat and the installation frame. The guide rollers are parallel to the pressure rollers. Several annular guide grooves are opened on the guide rollers. The annular guide grooves correspond one-to-one with the annular pressure grooves. A fourth threaded rod is rotatably arranged at the bottom of the lifting seat. The installation frame has a fourth threaded hole that is helically connected to the fourth threaded rod. A rotating cap is provided at the lower end of the fourth threaded rod.

[0016] By adopting the above technical solution, an installation frame and a lifting seat are set up. Rotating the fourth threaded rod adjusts the height of the lifting seat, causing the guide rollers on the lifting seat to move up and down, forming a guiding channel for the reinforcing bars in conjunction with the guide rollers on the installation frame. During the pulling process at the end of the reinforcing bars, the reinforcing bars are initially positioned to prevent bending and displacement, which would affect the clamping effect of the subsequent pressure rollers and bearing rollers. By rotating the cap, the spacing of the guide rollers can be quickly adjusted to accommodate reinforcing bars of different diameters, further improving the equipment's adaptability to reinforcing bars of various specifications.

[0017] Furthermore, a C-shaped frame is provided on the side of the mounting frame near the feeding assembly, and several trumpet-shaped guide tubes are provided on the C-shaped frame, with each guide tube corresponding to an annular guide groove on the guide roller.

[0018] By adopting the above technical solution, a C-shaped frame and a guide tube are set up. The horn-shaped guide tube on the C-shaped frame has a large inlet diameter and an outlet end that is compatible with the guide groove. It can guide the steel bar before it enters the guide roller. Even if there is a certain deviation when the steel bar is fed, it can accurately enter the annular guide groove of the guide roller through the guiding effect of the guide tube, which greatly reduces the probability of feeding deviation and improves feeding stability.

[0019] Furthermore, a support frame is provided between the straightening component and the feeding component, and a support roller for supporting the reinforcing bar is rotatably mounted on the support frame. The length direction of the support roller is perpendicular to the feeding direction of the reinforcing bar.

[0020] By adopting the above technical solution, the support roller on the support frame between the straightening component and the feeding component can support the steel bars after feeding and before entering the straightening component, and prevent the steel bars from sagging due to their own weight and causing greater friction with the guide tube.

[0021] In summary, this utility model has the following beneficial effects: In this application, a straightening component and a feeding component are provided. The rebar coil is mounted on a central frame, which can center the coiled rebar, preventing it from scattering during feeding and ensuring the stability and continuity of the feeding process. The rotating platform can rotate freely during the rebar feeding process, avoiding additional stress caused by torsion during feeding. The pulling unit slides along the fixed frame, pulling the ends of the rebar and assisting it in continuously passing through the straightening area, reducing manual intervention, improving straightening efficiency, and reducing the intensity of manual operation. The upper hydraulic cylinder drives the lower pressure frame, and the lower hydraulic cylinder drives the lifting frame, causing the lower pressure roller and lifting roller to move up and down. The roller spacing can be adjusted according to the rebar diameter. Combined with the annular lower pressure groove on the lower pressure roller and the annular lifting groove on the lifting roller, the rebar can be stably clamped and straightened, preventing rebar deviation during straightening. The drive component drives the two lower pressure rollers to rotate synchronously, providing feeding power for the rebar. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the mounting bracket according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the fixing frame and the traction unit in an embodiment of this utility model; Figure 4 This is a schematic diagram of the mounting plate and drive assembly in an embodiment of this utility model; Figure 5 This is a schematic diagram of the installation frame in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the traction unit in an embodiment of this utility model.

[0023] In the diagram: 10. Mounting frame; 20. Upper mounting plate; 21. Upper hydraulic cylinder; 22. Lower pressure frame; 23. Lower pressure roller; 24. Annular lower pressure groove; 25. Upper straight roller; 30. Lower mounting plate; 31. Lower hydraulic cylinder; 32. Lifting frame; 33. Lifting roller; 34. Annular lifting groove; 35. Lower straight roller; 40. Drive assembly; 41. First motor base; 42. Drive motor; 43. First chain; 44. First tension sprocket; 50. Fixing frame; 51. Slide groove; 52. Second threaded rod; 53. Nut slider; 54. Second pulley 55. Moving sprocket; 56. Second motor base; 57. Power motor; 58. Second chain; 69. Second tension sprocket; 60. Pulling unit; 61. Lower clamping plate; 62. Vertical rod; 63. Upper clamping plate; 64. Clamping groove; 65. Third threaded rod; 66. Handle; 70. Base plate; 71. Rotating truncated cone; 72. Center frame; 80. Mounting frame; 81. Lifting seat; 82. Guide roller; 83. Annular guide groove; 84. Fourth threaded rod; 85. Rotating cap; 86. C-shaped frame; 87. Guide tube; 90. Support frame; 91. Support roller. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figure 1-6 As shown in the figure, this application discloses a rebar straightening device, including a straightening component and a feeding component. The straightening component and the feeding component are arranged at intervals. The feeding component is used to place the rebar coil, and the straightening component is used to pull and straighten the rebar coil.

[0026] The straightening assembly includes a mounting frame 10, on which an upper mounting plate 20 and a lower mounting plate 30 are vertically spaced. An upper hydraulic cylinder 21 is mounted on the upper mounting plate 20. The piston rod of the upper hydraulic cylinder 21 passes downward through the upper mounting plate 20 and is positioned at the end of a lower pressure frame 22. The upper hydraulic cylinder 21 can drive the lower pressure frame 22 to rise and fall. The upper mounting plate 20 has four upper circular holes arranged in a rectangular array. The lower pressure frame 22 includes four upper circular rods slidably disposed in the four upper circular holes and upper U-shaped seats disposed at the lower ends of the four upper circular rods. Two horizontally arranged lower pressure rollers 23 are rotatably disposed in the U-shaped seats. Several annular lower pressure grooves 24 are spaced apart on the lower pressure rollers 23. The lower pressure frame 22 is also equipped with a drive assembly 40 for driving the two lower pressure rollers 23 to rotate synchronously. A lower hydraulic cylinder 31 is provided at the bottom of the lower mounting plate 30. The piston rod of the lower hydraulic cylinder 31 passes upward through the lower mounting plate 30 and is provided at the end of the lifting frame 32. The lower hydraulic cylinder 31 can drive the lifting frame 32 to rise and fall. The lower mounting plate 30 has four lower circular holes arranged in a rectangular array. The lifting frame 32 includes four lower circular rods slidably disposed in the four lower circular holes and a lower U-shaped seat disposed at the lower end of the four lower circular rods. Two lifting rollers 33 are rotatably disposed in the lower U-shaped seat corresponding to two lower pressure rollers 23. Several annular lifting grooves 34 are spaced apart on the lifting rollers 33. The lower pressure frame 22 is driven by the upper hydraulic cylinder 21 and the lifting frame 32 is driven by the lower hydraulic cylinder 31, which drives the lower pressure rollers 23 and the lifting rollers 33 to move up and down. The distance between the rollers can be adjusted according to the diameter of the steel bar. With the cooperation of the annular lower pressure grooves 24 on the lower pressure rollers 23 and the annular lifting grooves 34 on the lifting rollers 33, the steel bar can be stably clamped and straightened, and the steel bar can be prevented from deviating during the straightening process.

[0027] Specifically, two upward straightening rollers 25 are rotatably arranged on the lower pressure frame 22 between two lower pressure rollers 23, and the upward straightening rollers 25 are parallel to the lower pressure rollers 23. Two downward straightening rollers 35 are rotatably arranged on the lifting frame 32 between two lifting rollers 33, and the downward straightening rollers 35 are parallel to the lifting rollers 33. Both the upward straightening rollers 25 and the downward straightening rollers 35 have annular straightening grooves spaced apart, and these annular straightening grooves correspond one-to-one with the annular lower pressure grooves 24. The upward straightening rollers 25 and the downward straightening rollers 35 are staggered in the direction of rebar feeding. The staggered arrangement of the upward straightening rollers 25 and the downward straightening rollers 35 in the feeding direction forms a staggered extrusion. When the rebar passes through, it must sequentially pass through the lower pressure rollers 23, the upper straightening rollers 25, the downward straightening rollers 35, and the lifting rollers 33 for multiple extrusions and guidance, which can further eliminate the bending stress of the rebar. Compared with a structure relying solely on the lower pressure rollers 23 and the lifting rollers 33, this reduces the residual curvature of the rebar after straightening. The height of the upper straightening roller 25 near the feeding assembly is slightly lower than that of the lower pressure roller 23, and the height of the lower straightening roller 35 near the feeding assembly is slightly higher than that of the lifting roller 33. By squeezing the steel bar, the bending stress inside the steel bar is eliminated, resulting in a better straightening effect.

[0028] In configuration, the drive assembly 40 includes a first motor base 41 mounted on the lower pressure frame 22, a drive motor 42 mounted on the first motor base 41, and a first drive sprocket mounted on the output shaft of the drive motor 42. One end of the lower pressure roller 23 passes through a lower U-shaped seat and is fixedly fitted with a first driven sprocket. The first drive sprocket is connected to two first driven sprockets via a first chain 43. The drive motor 42 drives the first drive sprocket, which in turn drives the two first driven sprockets to rotate via the first chain 43, thus achieving synchronous rotation of the two lower pressure rollers 23. Two first tensioning sprockets 44 are also rotatably mounted on the lower pressure frame 22. The first tensioning sprockets 44 engage with the first chain 43 to tension the first chain 43, ensuring stable transmission.

[0029] A fixing frame 50 is provided inside the mounting frame 10 between the lower pressure frame 22 and the lifting frame 32. A pulling unit 60 for pulling the end of the rebar is slidably arranged on the fixing frame 50 along the direction perpendicular to the roller core of the lower pressure roller 23. Before the lower pressure roller 23 and the lifting roller 33 clamp the rebar, the pulling unit 60 slides along the fixing frame 50 to pull the end of the rebar, assisting the rebar to continuously pass through the straightening area between the lower pressure frame 22 and the lifting frame 32, reducing manual intervention, improving straightening efficiency, and reducing the intensity of manual operation. The fixing frame 50 includes two opposing grooves 51 on the mounting frame 10 located on the outside of the lower pressure frame 22 and the lifting frame 32. The length direction of the grooves 51 is perpendicular to the roller core direction of the lower pressure roller 23. The length of the grooves 51 is greater than the length of the lower pressure frame 22 and the supporting frame, and both ends of the grooves 51 extend beyond the ends of the lower pressure frame 22 and the supporting frame. A second threaded rod 52, with its length direction aligned with that of the slide groove 51, is rotatably mounted inside the slide groove 51. A nut slider 53 is helically mounted on the second threaded rod 52, and the nut slider 53 slides in engagement with the slide groove 51. The two sides of the pulling unit 60 are respectively connected to two nut sliders 53. One end of the second threaded rod 52 passes through the slide groove 51 and is equipped with a second driven sprocket 54. A second motor base 55 is mounted on the mounting frame 10, and a power motor 56 is mounted on the second motor base 55. The output shaft of the power motor 56 passes through the first motor base 41 and is equipped with a second driving sprocket. The second driving sprocket is connected to the two second driven sprockets 54 via a second chain 57. The power motor 56 drives the second driving sprocket to rotate, which in turn drives the two second driven sprockets 54 to rotate via the second chain 57, thereby causing the two second threaded rods 52 to rotate synchronously. This drives the nut sliders 53 to move the pulling unit 60 smoothly along the fixed frame 50. A second tensioning sprocket 58 is also horizontally rotatably mounted on the mounting bracket 10 below the second drive sprocket. The second tensioning sprocket 58 engages with the second chain 57 to tension the second chain 57 and ensure stable transmission.

[0030] In its specific configuration, the pulling unit 60 includes a lower clamping plate 61 connected at both ends to two nut sliders 53. Two vertical rods 62 are spaced apart on the lower clamping plate 61, and an upper clamping plate 63 is slidably mounted on both vertical rods 62. Specifically, the upper clamping plate 63 has two sliding holes, through which it is slidably fitted onto the two vertical rods 62. Both the upper clamping plate 63 and the lower clamping plate 61 have several clamping grooves 64, each corresponding to a one-to-one annular downward pressure groove 24. A third threaded rod 65 is rotatably mounted on the lower clamping plate 61, and a third threaded hole is helically connected to the third threaded rod 65 on the upper clamping plate 63. Rotating the third threaded rod 65 drives the upper clamping plate 63 to move up and down, clamping the ends of the reinforcing bars. The clamping grooves 64 on the clamping plates correspond one-to-one with the annular downward pressure grooves 24, enabling the clamping of reinforcing bars of different diameters, preventing bar displacement during clamping, and ensuring the stability of the reinforcing bars during pulling. A handle 66 is provided at the upper end of the third threaded rod 65. The handle 66 allows for quick manual adjustment of the spacing of the upper clamping plate 63 without the need for additional tools, simplifying the operation process of clamping and disassembling the rebar.

[0031] A mounting frame 80 is provided on the side of the mounting frame 10 near the material feeding assembly. A lifting seat 81 is vertically slidable within the mounting frame 80. Guide rollers 82 are rotatably mounted on both the lifting seat 81 and the mounting frame 80. The guide rollers 82 are parallel to the lower pressure roller 23. Several annular guide grooves 83 are formed on the guide rollers 82, corresponding one-to-one with the annular lower pressure grooves 24. A fourth threaded rod 84 is rotatably mounted at the bottom of the lifting seat 81. The mounting frame 80 has a fourth threaded hole that is helically connected to the fourth threaded rod 84. Rotating the fourth threaded rod 84 adjusts the height of the lifting seat 81, causing the guide rollers 82 on the lifting seat 81 to move up and down, forming a guiding channel for the reinforcing bar in conjunction with the guide rollers 82 on the mounting frame 80. During the pulling process of the reinforcing bar end, the reinforcing bar is initially positioned to prevent bending and displacement, which would affect the clamping effect of the subsequent lower pressure roller 23 and the bearing roller. A rotating cap 85 is provided at the lower end of the fourth threaded rod 84. The spacing of the guide rollers 82 can be quickly adjusted by rotating the cap 85 to accommodate steel bars of different diameters, further improving the equipment's adaptability to steel bars of various specifications. A C-shaped frame 86 is provided on the side of the mounting frame 80 near the feeding assembly. Several trumpet-shaped guide tubes 87 are provided on the C-shaped frame 86. The guide tubes 87 correspond one-to-one with the annular guide grooves 83 on the guide rollers 82. The trumpet-shaped guide tubes 87 on the C-shaped frame 86 have a large inlet diameter and an outlet end that matches the guide groove. They can guide the steel bars before they enter the guide rollers 82. Even if there is a certain deviation when the steel bars are fed, they can be accurately fed into the annular guide grooves 83 of the guide rollers 82 by the guiding effect of the guide tubes 87, which greatly reduces the probability of feeding deviation and improves feeding stability.

[0032] The feeding assembly includes a base plate 70 and several horizontally rotatable rotating truncated cones 71 mounted on the base plate 70. A central frame 72 is located at the center of the top surface of each rotating truncated cone 71. The rebar coil is mounted on the central frame 72, which centers the rebar, preventing it from scattering during feeding and ensuring stability and continuity of the feed. The rotating truncated cones 71 can rotate freely during the feeding process, avoiding additional stress caused by torsion. The pulling unit 60 slides along the fixed frame 50, pulling the ends of the rebar to assist it in continuously passing through the straightening area, reducing manual intervention, improving straightening efficiency, and reducing manual labor intensity. The drive assembly 40 drives two lower pressure rollers 23 to rotate synchronously, providing feeding power for the rebar. A support frame 90 is provided between the straightening assembly and the feeding assembly. Support rollers 91, which rotatably support the rebar, are mounted on the support frame 90. The length direction of the support rollers 91 is perpendicular to the feeding direction of the rebar. The support roller 91 on the support frame 90 between the straightening assembly and the feeding assembly can support the steel bars after feeding and before they enter the straightening assembly, preventing the steel bars from sagging due to their own weight and generating excessive friction with the guide tube 87. The support roller 91 can rotate freely, and when the steel bars are fed, it drives the support roller 91 to rotate, converting sliding friction into rolling friction, which greatly reduces the resistance when feeding the steel bars and reduces wear on the steel bar surface.

[0033] The working principle of the rebar straightening device in this embodiment is as follows: First, the rebar is coiled onto the central frame 72 of the rotating platform 71, so that one end of the rebar passes through the guide tube 87, the support roller 91, and the annular guide groove 83 of the guide roller 82 inside the mounting frame 80 in sequence. Then, the height of the lifting seat 81 is adjusted by rotating the rotating cap 85 of the mounting frame 80 and the fourth threaded rod 84, so that the guide roller 82 clamps the rebar. Then, the handle 66 and the third threaded rod 65 are rotated to drive the upper clamping plate 63 to descend, and the end of the rebar is clamped by the clamping groove 64 of the upper clamping plate 63 and the lower clamping plate 61. Then, the power motor 56 is started, which drives the second threaded rod 52 to rotate via the second driving sprocket, the second chain 57, and the second driven sprocket 54. This causes the nut slider 53 to drive the pulling unit 60 to slide along the fixed frame 50, pulling the reinforcing bar. After the end of the reinforcing bar passes between the lower pressure frame 22 and the support frame, the lower hydraulic cylinder 31 is started to drive the lifting frame 32 to rise, and the upper hydraulic cylinder 21 drives the lower pressure frame 22 to fall, so that the annular lifting groove 34 and the annular lower pressure groove 24 clamp the reinforcing bar. Next, the handle 66 is turned, and the third threaded rod 65 drives the upper clamping plate 63 to rise, losing its fixation on the end of the reinforcing bar. Finally, the drive motor 42 is started, which drives the two lower pressure rollers 23 to rotate synchronously via the first driving sprocket, the first chain 43, and the first driven sprocket, pulling the reinforcing bar. During the movement of the reinforcing bar, it undergoes multiple staggered compressions from the lower pressure roller 23, the upper straightening roller 25, the lower straightening roller 35, and the lifting roller 33, eliminating bending stress and completing the straightening process.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A reinforcing bar straightening device characterised in that: The device includes a straightening assembly and a feeding assembly arranged at intervals. The straightening assembly includes a mounting frame (10). The mounting frame (10) is vertically spaced with an upper mounting plate (20) and a lower mounting plate (30). An upper hydraulic cylinder (21) is mounted on the upper mounting plate (20). The piston rod of the upper hydraulic cylinder (21) passes downward through the upper mounting plate (20) and is positioned at the end of a lower pressure frame (22). Two horizontally arranged lower pressure rollers (23) are rotatably mounted inside the lower pressure frame (22). Several annular lower pressure grooves (24) are spaced apart on the lower pressure rollers (23). A driving assembly (40) is also provided on the lower pressure frame (22) to drive the two lower pressure rollers (23) to rotate synchronously. A lower hydraulic cylinder (31) is located at the bottom of the lower mounting plate (30). The piston rod of the pressure cylinder (31) passes upward through the lower mounting plate (30) and is provided with a lifting frame (32) at the end. Two lifting rollers (33) are rotatably arranged in the lifting frame (32) corresponding to the two lower pressure rollers (23). Several annular lifting grooves (34) are spaced apart on the lifting rollers (33). A fixed frame (50) is provided in the mounting frame (10) between the lower pressure frame (22) and the lifting frame (32). A pulling unit (60) for pulling the end of the steel bar is slidably arranged on the fixed frame (50) along the direction perpendicular to the roller core of the lower pressure roller (23). The material feeding assembly includes a base plate (70) and several rotating truncated cones (71) rotatably arranged on the base plate (70). A central frame (72) is provided in the middle of the top surface of the rotating truncated cones (71).

2. The rebar straightening device according to claim 1, characterized in that: The lower pressure frame (22) has two upper straight rollers (25) rotatably arranged between two lower pressure rollers (23), and the upper straight rollers (25) are parallel to the lower pressure rollers (23). The lifting frame (32) has two lower straight rollers (35) rotatably arranged between two lifting rollers (33), and the lower straight rollers (35) are parallel to the lifting rollers (33). The upper straight rollers (25) and the lower straight rollers (35) are all provided with annular straightening grooves spaced apart. The annular straightening grooves correspond one-to-one with the annular lower pressure grooves (24). The upper straight rollers (25) and the lower straight rollers (35) are staggered in the direction of steel bar feeding.

3. The rebar straightening device according to claim 1, characterized in that: The drive assembly (40) includes a first motor mount (41) mounted on the lower press frame (22), a drive motor (42) mounted on the first motor mount (41), a first drive sprocket mounted on the output shaft of the drive motor (42), one end of the lower press roller (23) passes through the lower press frame (22) and is fixedly fitted with a first driven sprocket, the first drive sprocket is connected to two first driven sprockets via a first chain (43), and two first tension sprockets (44) are rotatably mounted on the lower press frame (22), the first tension sprockets (44) are tensioned in conjunction with the first chain (43).

4. A rebar straightening device according to claim 1, characterized in that: The fixing frame (50) includes two grooves (51) on the mounting frame (10) with opposite slots on the outer sides of the lower pressure frame (22) and the lifting frame (32). The length direction of the grooves (51) is perpendicular to the roller core direction of the lower pressure roller (23). A second threaded rod (52) with the same length direction as the groove (51) is rotatably disposed in the groove (51). A nut slider (53) is helically disposed on the second threaded rod (52). The nut slider (53) is slidably engaged with the groove (51). The pulling unit (60) is connected to the two nut sliders (53) on both sides respectively. One end of the sprocket (52) passes through the slide groove (51) and is provided with a second driven sprocket (54). A second motor seat (55) is provided on the mounting frame (10). A power motor (56) is provided on the second motor seat (55). The output shaft of the power motor (56) passes through the first motor seat (41) and is provided with a second driving sprocket. The second driving sprocket and two second driven sprockets (54) are connected by a second chain (57). A second tensioning sprocket (58) is also horizontally rotatably provided on the mounting frame (10) below the second driving sprocket. The second tensioning sprocket (58) and the second chain (57) are tensioned together.

5. A rebar straightening device according to claim 4, characterized in that: The pulling unit (60) includes a lower clamping plate (61) connected to two nut sliders (53) at both ends. Two vertical rods (62) are spaced apart on the lower clamping plate (61). An upper clamping plate (63) is slidably arranged on the two vertical rods (62). Several clamping grooves (64) are opened on the upper clamping plate (63) and the lower clamping plate (61) respectively. The clamping grooves (64) correspond one-to-one with the annular pressing grooves (24). A third threaded rod (65) is rotatably arranged on the lower clamping plate (61). A third threaded hole is opened on the upper clamping plate (63) and is helically connected to the third threaded rod (65). A handle (66) is provided at the upper end of the third threaded rod (65).

6. A rebar straightening device according to claim 5, characterized in that: The mounting frame (10) is provided with a mounting frame (80) on the side near the feeding assembly. A lifting seat (81) is vertically slidably arranged inside the mounting frame (80). Guide rollers (82) are rotatably arranged on both the lifting seat (81) and the mounting frame (80). The guide rollers (82) are parallel to the pressure rollers (23). Several annular guide grooves (83) are opened on the guide rollers (82). The annular guide grooves (83) correspond one-to-one with the annular pressure grooves (24). A fourth threaded rod (84) is rotatably arranged at the bottom of the lifting seat (81). The mounting frame (80) is provided with a fourth threaded hole that is helically connected to the fourth threaded rod (84). A rotating cap (85) is provided at the lower end of the fourth threaded rod (84).

7. A rebar straightening device according to claim 6, characterized in that: The mounting frame (80) is provided with a C-shaped frame (86) on the side near the feeding assembly. The C-shaped frame (86) is provided with a number of trumpet-shaped guide tubes (87). The guide tubes (87) correspond one-to-one with the annular guide grooves (83) on the guide rollers (82).

8. A rebar straightening device according to claim 1, characterized in that: A support frame (90) is provided between the straightening component and the feeding component. A support roller (91) for supporting the reinforcing bar is rotatably provided on the support frame (90). The length direction of the support roller (91) is perpendicular to the feeding direction of the reinforcing bar.

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