Reinforcing steel bar straightening device

Abstract

The utility model relates to the technical field of reinforcing steel bar machining, in particular to a reinforcing steel bar straightening device. According to the technical scheme, the reinforcing steel bar straightening device comprises a machine frame and at least one straightening mechanism installed on the machine frame, each straightening mechanism comprises a plurality of straightening cylinders arranged side by side, and the straightening cylinders are connected with a driving mechanism and driven by the driving mechanism to rotate in the circumferential direction. Each straightening cylinder is provided with a group of radial threaded through holes, a certain axial distance is kept between the threaded through holes, straightening blocks are installed in the threaded through holes, the two ends of each straightening block abut against each other through jackscrews screwed into the threaded through holes, a straightening through hole is formed in the middle of each straightening block, the straightening through holes and the straightening cylinders are coaxial, and the straightening cylinders are sleeved with the straightening through holes. And the aperture of the adjusting through hole is matched with the outer diameter of the reinforcing steel bar.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar processing, in particular to a steel bar straightening device. Background Art

[0002] Rebar straightening is an important step in rebar processing. Its purpose is to reduce the bending parts of the rebar and make the rebar basically straight, so as to obtain a more accurate rebar length during subsequent cutting. It can also avoid the stress performance of the cast reinforced concrete structure affected by the bending of the rebar.

[0003] In the prior art, one of the more common methods for straightening steel bars is mechanical straightening, in which two or more pairs of straightening wheels arranged at a certain angle are used to apply force to the steel bars to achieve straightening. However, there are drawbacks: the number and angle of the straightening wheels are limited, and the straightening effect is poor for steel bars with more complex bending conditions, so there is still room for improvement. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned background technology and to provide a steel bar straightening device which can better achieve steel bar straightening.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A steel bar straightening device comprises a frame and at least one straightening mechanism mounted on the frame, the straightening mechanism comprising a plurality of straightening cylinders arranged side by side, each straightening cylinder being connected to a driving mechanism and driven by the driving mechanism to achieve circumferential rotation, each straightening cylinder being provided with a group of radial threaded through holes, a certain axial spacing being maintained between these threaded through holes, a straightening block being installed in the threaded through hole, both ends of the straightening block being tightened by top screws screwed into the threaded through holes, a straightening through hole being provided in the middle of the straightening block, the straightening through hole being coaxial with the straightening cylinder, and the aperture of the straightening through hole being adapted to the outer diameter of the steel bar.

[0007] In a further solution, the driving mechanism includes a straightening motor, several transmission gears and a driving gear. The transmission gears are connected to the straightening cylinder one-to-one, and the transmission gears are directly meshed with each other or meshed through intermediate gears in sequence. The driving gear is fixed on the output shaft of the straightening motor and meshes with one of the transmission gears.

[0008] In a further solution, a plurality of auxiliary holes are provided on the straightening cylinder, and the auxiliary holes are staggered with the threaded through holes.

[0009] In a further solution, the straightening block is square, the threaded through hole is adapted to the straightening block, and inner walls around the threaded through hole are provided with internal threads adapted to the top screw.

[0010] In a further solution, the axis of the threaded through hole is perpendicular to the axis of the straightening cylinder, and the axes of all the threaded through holes are in the same plane.

[0011] In a further solution, the front end of the straightening mechanism is provided with a plurality of tapered sleeves for guiding the steel bars, and the tapered sleeves correspond one to one with the straightening cylinders and are coaxial.

[0012] In a further solution, the rear end of the straightening mechanism is provided with at least one traction mechanism, the traction mechanism includes several pairs of traction wheels, a traction motor, a rotating shaft swing frame and a cylinder; the rotating shaft is driven by the traction motor, each pair of traction wheels corresponds to a straightening cylinder, and a channel for steel bars is provided between the driving wheel and the pressure wheel of each pair of traction wheels. The driving wheel is fixed on the rotating shaft, and the pressure wheel is rotatably installed on the swing frame. One end of the swing frame is hinged to the frame through a hinge shaft, and the other end is cantilevered and hinged to the top rod of the cylinder. When the top rod of the cylinder moves, the pressure wheel presses the traction wheel or leaves the traction wheel.

[0013] In a further solution, grooves are provided on the circumferential outer walls of the traction wheel and the pressure wheel. When the pressure wheel presses against the driving wheel, the gap formed by the grooves between the two wheels serves as a passage for the steel bars.

[0014] In a further solution, a conduit is provided between the outlet of the straightening cylinder and the driving wheel of the traction mechanism.

[0015] The beneficial effects of the present invention are as follows: the present invention utilizes a circumferentially rotatable straightening cylinder. As the straightening blocks fixed within the cylinder rotate with the cylinder, the straightening holes of the straightening blocks apply force to the curved portions of the steel bars, thereby straightening the curved portions. The rotating straightening blocks can straighten the steel bars 360° around the circumference, resulting in a simple structure and excellent straightening effect. Gear transmission is utilized between the straightening cylinders to achieve substantially the same rotational speed, resulting in a more consistent straightened steel bar. The degree of compression of the pressure rollers can be adjusted by cylinder pressure, adapting to steel bars of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present application.

[0018] Figure 2 It is a side view structural diagram of an embodiment of the present application.

[0019] Figure 3It is a front view structural diagram of an embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of the top structure of an embodiment of the present application.

[0021] Figure 5 This is a schematic diagram of the installation method of the straightening cylinder, the straightening block and the top screw in an embodiment of the present application.

[0022] Figure numerals: frame 1, traction motor 2, straightening mechanism 3, tapered sleeve 31, straightening cylinder 32, guide tube 33, box body 34, bearing seat 35, auxiliary hole 36, transmission gear 37, straightening block 38, straightening through hole 39, threaded through hole 310, top screw 311, internal thread 312, driving gear 313, gas tank 4, straightening motor 5, rotating shaft 6, cylinder 7, bracket 8, swing frame 9, pressure wheel 10, articulated shaft 11, gantry 12, driving wheel 13. DETAILED DESCRIPTION

[0023] In order to enable ordinary technicians in this field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below with reference to the accompanying drawings and embodiments, but the utility model is not limited to the following embodiments.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0026] like Figures 1 to 4 As shown, an embodiment of the present application provides a steel bar straightening device, including a frame 1 and a straightening mechanism 3 installed on the top of the frame 1. The number of straightening mechanisms 3 is determined according to the application scenario. In this embodiment, two groups of straightening mechanisms 3 are arranged side by side on the frame 1.

[0027] like Figure 1 、 Figure 3 、 Figure 4As shown, the straightening mechanism 3 includes several straightening cylinders 32 arranged side by side. The number of straightening cylinders 32 is determined according to the application scenario. In this embodiment, the straightening mechanism 3 is provided with four horizontal straightening cylinders 32, which are arranged in parallel with each other at a certain distance. The two ends of the straightening cylinders 32 are supported by bearing seats 35. Each straightening cylinder 32 is connected to a driving mechanism and realizes circumferential rotation under the drive of the driving mechanism. Specifically, as Figure 4 As shown, the drive mechanism includes a straightening motor 5, a plurality of transmission gears 37, and a driving gear 313. The transmission gears 37 are mounted within a housing 34 and mesh with each other directly or through intermediate gears. When directly meshed, the two straightening cylinders 32 rotate in opposite directions, while when meshed through intermediate gears, they rotate in the same direction. These transmission gears 37 are fixed one-to-one to the outer wall of the straightening cylinder 32. The driving gear 313 is fixed to the output shaft of the straightening motor 5 and meshes with one of the transmission gears 37. When the driving gear 313 rotates, the remaining transmission gears 37 also rotate, thereby driving the corresponding straightening cylinder 32 to rotate.

[0028] In this embodiment, Figure 1 、 Figure 2 、 Figure 4 as well as Figure 5 As shown, each straightening cylinder 32 is formed with a set of radial threaded through-holes 310. These threaded through-holes 310 are arranged at a predetermined spacing along the length of the straightening cylinder 32. The spacing between the threaded through-holes 310 can be the same or different. Obviously, the threaded through-holes 310 intersect with the inner bore of the straightening cylinder 32. The straightening cylinder 32 is also formed with a plurality of auxiliary holes 36. The auxiliary holes 36 are staggered with the threaded through-holes 310. As one staggered arrangement, the auxiliary holes 36 and the threaded through-holes 310 are spaced apart from each other.

[0029] like Figure 5 As shown, a straightening block 38 is mounted within the threaded through hole 310. Both ends of the straightening block 38 are secured by screws 311 screwed into the threaded through hole 310. A straightening through hole 39 is defined in the center of the straightening block 38. This straightening through hole 39 is coaxial with the straightening cylinder 32, and the diameter of the straightening through hole 39 matches the outer diameter of the rebar. When the rebar is inserted into the straightening cylinder 32, a tool such as a screwdriver can be inserted into the auxiliary hole 36 to apply force to the head of the rebar, forcing it into the straightening through hole 39 of the straightening block 38. Furthermore, the auxiliary hole 36 also serves to dissipate heat and remove chips during rebar straightening. The straightening block 38 is square in shape, and the threaded through hole 310 is adapted to fit within the straightening block 38. The inner walls of the threaded through hole 310 are provided with internal threads 312 that match the screws 311. The axes of the threaded through holes 310 are perpendicular to the axis of the straightening cylinder 32 . The threaded through holes 310 may be staggered at a certain angle, or the axes of all the threaded through holes 310 may be on the same plane.

[0030] like Figure 2As shown, the front end of the straightening mechanism 3 is provided with a plurality of cone sleeves 31 for guiding the steel bars. The cone sleeves 31 correspond to the straightening cylinders 32 one by one and are coaxial. The rear end of the straightening mechanism 3 is provided with a traction mechanism corresponding to the straightening mechanism 3. The traction mechanism includes a plurality of pairs of traction wheels, a traction motor 2, a rotating shaft 6, a swing frame 9 and a cylinder 7. Figure 1 、 Figure 3 As shown, the rotating shaft 6 is driven by the traction motor 2. Each pair of traction wheels corresponds to a straightening cylinder 32. The circumferential outer walls of the traction wheels and the pressure wheel 10 of each pair of traction wheels are each provided with a groove. When the pressure wheel 10 presses against the driving wheel 13, the gap formed by the groove between the two wheels serves as a passage for the steel bars. A guide tube 33 is provided between the outlet of the straightening cylinder 32 and the driving wheel 13 of the traction mechanism.

[0031] In the traction wheel, the driving wheel 13 is fixed to the rotating shaft 6, the pressure wheel 10 is rotatably mounted on the swing frame 9, the cylinder 7 is mounted on the gantry 12 via the bracket 8, and the gantry 12 is mounted on the frame 1. One end of the swing frame 9 is hinged to the frame 1 via the hinge shaft 11, and the other end is cantilevered and hinged to the top rod of the cylinder 7. When the top rod of the cylinder 7 is actuated, the pressure wheel 10 presses against or moves away from the traction wheel. The hinge shaft 11 is mounted on the gantry 12. Generally, each swing frame 9 shares the hinge shaft 11, and the other end of each swing frame 9 is connected to a cylinder 7. A compressed air tank 4 is mounted on the gantry 12, which is connected to the cylinder 7 to supply air.

[0032] During operation, the steel bar passes through the cone sleeve 31 and then into the straightening cylinder 32. After passing through the straightening inner holes of each straightening block 38, the steel bar comes out from the outlet of the straightening cylinder 32 and passes through the guide tube 33 to reach the groove of the driving wheel 13. The push rod of the cylinder 7 is pushed out, driving the swing frame 9 to swing down so that the pressure wheel 10 presses the steel bar against the driving wheel 13. As the traction motor 2 rotates, the steel bar is continuously pulled forward. During the movement, the straightening block 38 rotates with the straightening cylinder 32, and the straightening through hole 39 of the straightening cylinder 32 applies force to the bent part of the steel bar to straighten the bent steel bar.

[0033] The working principle of straightening the bent steel bars in this embodiment is as follows:

[0034] The push rod of the cylinder 7 is pushed out, and the pressure wheel 10 of the traction mechanism is swung down, clamping the steel bar together with the driving wheel 13. As the traction motor 2 drives the driving wheel 13 to rotate, the pulled steel bar continuously enters the straightening cylinder 32;

[0035] The straightening motor 5 rotates with the driving gear 313, causing the straightening cylinder 32 to rotate circumferentially, and applying pressure to the bent portion of the traction steel bar through the straightening through holes 39 in the plurality of straightening blocks 38 to achieve straightening of the steel bar.

[0036] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A steel bar straightening device, characterized in that: The invention comprises a frame (1) and at least one set of straightening mechanisms (3) installed on the frame (1), wherein the straightening mechanism (3) comprises a plurality of straightening cylinders (32) arranged side by side, each straightening cylinder (32) being connected to a driving mechanism and realizing circumferential rotation under the drive of the driving mechanism, each straightening cylinder (32) being provided with a set of radial threaded through holes (310), wherein a certain axial spacing is maintained between these threaded through holes (310), a straightening block (38) being installed in the threaded through hole (310), both ends of the straightening block (38) being pressed tightly by top screws (311) screwed into the threaded through hole (310), a straightening through hole (39) being provided in the middle of the straightening block (38), the straightening through hole (39) being coaxial with the straightening cylinder (32), and the aperture of the straightening through hole (39) being adapted to the outer diameter of the steel bar.

2. A steel bar straightening device according to claim 1, characterized in that: The driving mechanism comprises a straightening motor (5), a plurality of transmission gears (37) and a driving gear (313). The transmission gears (37) are connected to the straightening cylinder (32) one by one. The transmission gears (37) are meshed with each other directly or through intermediate gears. The driving gear (313) is fixed on the output shaft of the straightening motor (5) and meshes with one of the transmission gears (37).

3. A steel bar straightening device according to claim 1, characterized in that: The straightening cylinder (32) is provided with a plurality of auxiliary holes (36), and the auxiliary holes (36) and the threaded through holes (310) are arranged in a staggered manner.

4. A steel bar straightening device according to claim 1, characterized in that: The straightening block (38) is square in shape, the threaded through hole (310) is adapted to the straightening block (38), and inner threads (312) adapted to the top screw (311) are provided on the inner walls around the threaded through hole (310).

5. A steel bar straightening device according to claim 1, characterized in that: The axis of the threaded through hole (310) is perpendicular to the axis of the straightening cylinder (32), and the axes of all the threaded through holes (310) are located on the same plane.

6. A steel bar straightening device according to any one of claims 1 to 5, characterized in that: The front end of the straightening mechanism (3) is provided with a plurality of tapered sleeves (31) for guiding the steel bars, and the tapered sleeves (31) correspond to the straightening cylinders (32) in a one-to-one manner and are coaxial.

7. A steel bar straightening device according to any one of claims 1 to 5, characterized in that: The rear end of the straightening mechanism (3) is provided with at least one traction mechanism, which comprises a plurality of pairs of traction wheels, a traction motor (2), a rotating shaft (6), a swing frame (9) and a cylinder (7); the rotating shaft (6) is driven by the traction motor (2); each pair of traction wheels corresponds to a straightening cylinder (32); a channel for steel bars is provided between the driving wheel (13) and the pressure wheel (10) of each pair of traction wheels; the driving wheel (13) is fixed on the rotating shaft (6); the pressure wheel (10) is rotatably mounted on the swing frame (9); one end of the swing frame (9) is hinged to the frame (1) through a hinge shaft (11); the other end is cantilevered and hinged to the push rod of the cylinder (7); when the push rod of the cylinder (7) is actuated, the pressure wheel (10) presses the traction wheel or leaves the traction wheel.

8. A steel bar straightening device according to claim 7, characterized in that: The circumferential outer walls of the traction wheel and the pressure wheel (10) are both provided with grooves. When the pressure wheel (10) is pressed against the driving wheel (13), the gap formed by the grooves between the two wheels serves as a passage for the steel bars.

9. A steel bar straightening device according to claim 7, characterized in that: A guide tube (33) is provided between the outlet of the straightening cylinder (32) and the driving wheel (13) of the traction mechanism.

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