Steel bar straightening device and operation method thereof

Abstract

The invention provides a reinforcing steel bar straightening device and an operation method thereof. The reinforcing steel bar straightening device comprises a driving device, a reinforcing steel bar straightening assembly and a gear set connected with the output end of the driving device and the input end of the reinforcing steel bar straightening assembly. The reinforcing steel bar straightening assembly comprises a first adjuster used for conducting preliminary straightening on the penetrating reinforcing steel bar, a second adjuster used for conducting accurate straightening on the penetrating reinforcing steel bar and a third adjuster. Through the first adjustor and the second adjustor which can adjust the distance according to the diameter and the bending degree of the reinforcing steel bar, the defects that simple mechanical straightening equipment is single in function and cannot be flexibly adjusted according to different bending degrees and diameters of the reinforcing steel bar are overcome; and finally, the technical effects of accurate positioning and stable straightening of the reinforcing steel bars are achieved.

Description

Technical Field

[0001] This invention relates to the technical field of building construction, and more specifically, to a rebar straightening device and its operating method. Background Technology

[0002] In construction engineering, steel reinforcement is a critical structural material, and its quality directly affects the strength and stability of reinforced concrete structures. During transportation, storage, and initial processing, steel reinforcement often bends and deforms due to collisions, compression, or improper stacking. Therefore, straightening the steel reinforcement before formal construction is an essential and crucial step.

[0003] Currently, rebar straightening mainly relies on manual labor or simple mechanical equipment. Manual straightening typically involves workers using hammers and other tools to tap the bent rebar segment by segment, which is not only labor-intensive and inefficient but also makes it difficult to guarantee straightening accuracy and consistency. Simple mechanical straightening equipment often has limited functionality and cannot be flexibly adjusted according to different degrees of curvature and diameters of the rebar, resulting in poor straightening effects for rebars with large curvatures or unusual diameters. In addition, some existing straightening equipment lacks precision and stability in power transmission and adjustment mechanisms, easily leading to problems such as high power loss and uneven stress on the rebar during straightening, which in turn affects the straightening quality and the service life of the equipment.

[0004] Therefore, there is an urgent need for a steel bar straightening device that can achieve efficient straightening, precise adjustment, and stable transmission. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a rebar straightening device and its operation method to solve at least one problem existing in the prior art.

[0006] In a first aspect, the present invention provides a rebar straightening device, comprising a driving device and a rebar straightening assembly, and a gear set connected to the output end of the driving device and the input end of the rebar straightening assembly; the rebar straightening assembly includes a first adjuster for preliminary straightening of a passing rebar, a second adjuster for precise straightening of a passing rebar, and a third adjuster; the first adjuster includes a first adjusting rod and a double pressure roller and a triple pressure roller mounted on the first adjusting rod, the distance between the double pressure roller and the triple pressure roller being adjustable; the second adjuster includes a second adjusting head, an upper single pressure roller, a lower single pressure roller, and a second adjusting transmission. The gear, with the upper and lower single pressure rollers mounted on the second adjusting head, rotates to drive the second adjusting head to deflect synchronously, and changes the distance between the upper and lower single pressure rollers through the eccentric shaft structure of the second adjusting head; the third adjuster includes a second adjusting rod, a hydraulic rod for driving the second adjusting rod to rotate, and a protractor for measuring the rotation angle of the second adjusting rod in real time; the hydraulic rod extends and retracts to drive the second adjusting rod to rotate around its fixed axis, and through the spline engagement between the second adjusting rod and the second adjusting gear, drives the second adjusting gear to rotate synchronously.

[0007] Furthermore, a preferred technical solution includes a housing; the drive device, the rebar straightening assembly, and the gear set are disposed within the housing; and a button for starting or stopping the drive device is provided on the housing.

[0008] Furthermore, a preferred technical solution is that the middle part of the second adjusting rod is a splined shaft segment that matches the splined hole of the third adjusting gear, one end of the second adjusting rod is hinged to the hydraulic rod, and the other end is a splined shaft segment that mates with the splined hole of the second adjusting transmission gear.

[0009] Furthermore, a preferred technical solution is that the gear set includes a third adjusting gear, a motor gear, and an intermediate transmission gear; the motor gear is connected to the output end of the drive device; the left gear ring of the intermediate transmission gear meshes externally with the motor gear, and the right gear ring meshes externally with the third adjusting gear.

[0010] Furthermore, a preferred technical solution is that the edge of the second adjusting head is configured as a fan-shaped structure of an eccentric shaft, and the upper single pressure roller and the lower single pressure roller are mounted on the eccentric shaft through bearings.

[0011] Furthermore, a preferred technical solution is that the first adjusting rod of the first regulator is a telescopic structure, and the distance between the double pressure roller and the triple pressure roller is adjusted by the telescopic movement of the first adjusting rod.

[0012] Secondly, the present invention provides a method for operating a rebar straightening device, comprising the following steps: starting a drive device, the output shaft of the drive device rotates a pulley assembly, and the gear assembly drives a rebar straightening assembly including a first adjuster for preliminary straightening of the passing rebar, a second adjuster for precise straightening of the passing rebar, and a third adjuster; feeding the rebar to be straightened into the first adjuster, the rotation of the second adjusting rod drives the second adjusting transmission gear to rotate synchronously, the rotation of the second adjusting transmission gear causes the second adjusting head to deflect, changing the distance between the upper and lower single pressure rollers, thereby changing the squeezing force of the rebar between the double and triple pressure rollers, achieving preliminary straightening of the rebar; after preliminary straightening, the rebar to be straightened enters the second adjuster, the angle of the second adjusting rod is measured in real time by a protractor, and the position and angle of the second adjusting rod are controlled by a hydraulic rod according to the measured angle, thereby adjusting the distance between the upper and lower single pressure rollers in real time by the second adjusting head, achieving precise straightening of the rebar; after straightening is completed, the drive device is stopped and reset to await the next operation.

[0013] Furthermore, a preferred technical solution further includes acquiring the angle signal of the protractor; comparing the acquired angle signal with a preset angle value; and controlling the hydraulic rod according to the comparison result.

[0014] Furthermore, a preferred technical solution is that before the steel bar to be straightened is fed into the first adjuster, the gear set drives the second adjusting rod to move through a spline engagement, so that the second adjusting rod rotates around its fixed axis, adjusting the distance between the upper single pressure roller and the lower single pressure roller to the initial position.

[0015] Furthermore, a preferred technical solution is that, before the steel bar to be straightened is fed into the first adjuster, the distance between the double pressure roller and the triple pressure roller is adjusted to match the diameter of the steel bar by rotating the movable section of the first adjusting rod, and the distance is fixed by tightening the locking nut.

[0016] This invention discloses a rebar straightening device and its operating method. The device uses a motor-driven gear set to drive the rebar straightening components, thereby improving the efficiency of rebar straightening and solving the problems of high labor intensity and low efficiency in traditional manual straightening. By using a first and a second adjuster that can adjust the distance according to the diameter and curvature of the rebar, the device overcomes the shortcomings of simple mechanical straightening equipment, which has limited functionality and cannot flexibly adjust according to different degrees of curvature and diameter of the rebar. Ultimately, it achieves the technical effect of precise positioning and stable straightening of the rebar.

[0017] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0018] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings: Figure 1 This is a schematic diagram of the rebar straightening device according to an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the rebar straightening device according to an embodiment of the present invention; Figure 3 Another structural schematic diagram of the rebar straightening device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first adjuster of a rebar straightening device according to the present invention; Figure 5 This is a schematic diagram of the structure of the second adjuster of the rebar straightening device of the present invention; Figure 6 This is a schematic diagram of the structure of the third adjuster of the rebar straightening device of the present invention; Figure 7 This is a schematic diagram of the gear assembly of a rebar straightening device according to the present invention.

[0019] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions.

[0020] The attached figures are labeled as follows: 1. Housing; 2. Gear set; 3. Third adjuster; 4. Second adjuster; 5. First adjuster; 6. Reinforcing bar; 7. Button; 8. Motor; 201. Third adjusting gear; 202. Motor gear; 203. Intermediate transmission gear; 301. Hydraulic rod; 302. Protractor; 303. Second adjusting rod; 401. Second adjusting head; 402. Upper single pressure roller; 403. Lower single pressure roller; 404. Second adjusting transmission gear; 501. First adjusting rod; 502. Double pressure roller; 503. Triple pressure roller. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. It should be noted that the following embodiments are only used to illustrate the implementation methods and typical parameters of the present invention, and are not intended to limit the parameter ranges described in the present invention. Reasonable variations derived therefrom are still within the protection scope of the claims of the present invention. It should be noted that the endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values; these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of various ranges, the endpoint values ​​of various ranges and individual point values, and individual point values ​​can be combined to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein. Unless otherwise defined, all terms, symbols, and other scientific terms used herein are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In some cases, terms with a conventional understanding are defined herein for clarification or ease of reference, and such definitions should not be construed as indicating a significant difference from the conventional understanding in the art. The technical methods described or referenced herein are generally well understood by those skilled in the art and employed by conventional methods.

[0022] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0023] Example 1 Figures 1-3 A general description of the rebar straightening device is provided. For example... Figure 1-3As shown, the rebar straightening device mainly includes a driving device and a rebar straightening assembly, as well as a gear set connected to the output end of the driving device and the input end of the rebar straightening assembly; the rebar straightening assembly includes a first adjuster 5 for preliminary straightening of the passing rebar 6, a second adjuster 4 for precise straightening of the passing rebar 6, and a third adjuster 3; the first adjuster 5 includes a first adjusting rod and double pressure rollers and triple pressure rollers mounted on the first adjusting rod, the distance between the double pressure rollers and triple pressure rollers being adjustable; the second adjuster 4 includes a second adjusting head, an upper single pressure roller, a lower single pressure roller, and a second adjusting transmission gear, the... The upper and lower single pressure rollers are mounted on the second adjusting head. The rotation of the second adjusting transmission gear drives the second adjusting head to deflect synchronously, and the distance between the upper and lower single pressure rollers is changed through the eccentric shaft structure of the second adjusting head. The third adjusting device 3 includes a second adjusting rod, a hydraulic rod 301 for driving the second adjusting rod to rotate, and a protractor 302 for measuring the rotation angle of the second adjusting rod in real time. The extension and retraction of the hydraulic rod 301 drives the second adjusting rod to rotate around its fixed axis. Through the spline engagement between the second adjusting rod and the second adjusting transmission gear, the second adjusting transmission gear is driven to rotate synchronously.

[0024] It should be noted that the reinforcing bars are of suitable diameters of 10-32mm, entering from the left side of the device and passing through the first and second adjusters in sequence. The straightening process is completed through the coordinated action of all components. The drive device is a motor; specifically, a three-phase electric motor of model Y132S-4 with a rated power of 1.5kW and a rated speed of 1450r / min is selected. It is mounted on a special mounting plate on the left side inside the sheet metal casing using four M10×30 bolts. A 12×8×30mm keyway is machined on the protruding end of the motor output shaft, which is rigidly connected to the motor gear via a flat key, used to output power and drive the motor gear to rotate.

[0025] The third adjuster consists of a hydraulic rod, a protractor, and a second adjusting rod. The hydraulic rod can be a single-acting hydraulic rod of model HOB40×50, with a rated pressure of 10MPa and an effective stroke of 50mm. One end is fixed to the threaded seat on the inner wall of the iron shell by an M16×40 bolt. The end of the piston rod is movably connected to the middle hinge point of the second adjusting rod 303 through a fisheye bearing, ensuring that the hydraulic rod can smoothly push the second adjusting rod 303 to rotate around the fixed axis when it extends or retracts. The protractor can be a digital angle sensor of model WDD35D4, with a measurement range of 0-360° and an accuracy of ±0.1°. It is fixed to the inner wall of the iron shell by an L-shaped steel plate bracket. The detection end is coaxially connected to the fixed axis of the second adjusting rod, which can collect the rotation angle of the second adjusting rod 303 in real time and transmit the angle signal to the control unit.

[0026] The second adjusting rod can be made of 45 steel with heat treatment. It has a 25mm diameter spline shaft section machined in the middle to match the spline hole of the third adjusting gear. The two ends of the spline shaft section are provided with 25mm diameter shoulders to limit the axial movement of the third adjusting gear 201. One end of the adjusting rod is connected to the hydraulic rod 301 through a hinge, and the other end is also machined with a spline shaft section to cooperate with the spline hole of the second adjusting transmission gear 404 to realize power transmission.

[0027] The second adjuster 4 may include a second adjusting head 401, an upper single pressure roller 402, a lower single pressure roller 403, and a second adjusting transmission gear 404. The edge of the second adjusting head is a fan-shaped structure with an eccentric shaft, and the upper and lower single pressure rollers are mounted on the eccentric shaft via bearings. Specifically, the second adjusting transmission gear 404 is a spur gear with a module of 2.5 and 30 teeth. Its hub is machined with a spline hole (matching the spline shaft at the end of the second adjusting rod 303). The gear is circumferentially fixed to the second adjusting head 401 by a flat key (specification 10×8×25) and tightened by an M8×12 set screw to prevent relative rotation between the gear and the adjusting head. The second adjusting head 401 is forged from 45 steel and has a fan-shaped structure. Its edge is machined with an eccentric shaft. The upper single pressure roller 402 and the lower single pressure roller 403 are respectively mounted on the eccentric shaft through needle roller bearings. When the second adjusting head 401 rotates with the gear, the change in the position of the eccentric shaft can drive the synchronous adjustment of the distance between the upper and lower pressure rollers. Both the upper single pressure roller 402 and the lower single pressure roller 403 have wheel cores made of 45 steel, with a wheel diameter of 80mm and a width of 30mm. Their surfaces are covered with 5mm thick wear-resistant rubber. This rubber layer prevents damage to the rebar surface during straightening and increases friction to propel the rebar forward. The needle roller bearing between the pressure roller and the eccentric shaft ensures flexible rotation of the pressure roller, reducing resistance as the rebar passes through. In a specific embodiment, a 1° deflection corresponds to a 0.087mm change in spacing, meeting the straightening pressure requirements for rebars with different degrees of curvature.

[0028] The first adjuster 5 consists of a first adjusting rod 501, a double pressure roller 502, and a triple pressure roller 503. Its design focuses on achieving flexible adjustment of the pressure roller spacing. In other words, the first adjusting rod of the first adjuster 5 is a telescopic structure, and the spacing between the double and triple pressure rollers is adjusted by the telescopic movement of the first adjusting rod. Specifically, the first adjusting rod 501 is a two-stage threaded telescopic structure. The fixed section has a diameter of 30mm, and one end is fixed to the inner wall of the iron shell 1 by an M16×40 bolt, with a left-hand internal thread machined inside. The movable section has a diameter of 25mm, and one end is machined with a left-hand external thread matching the fixed section, while the other end is welded with a bushing for installing the axles of the double and triple pressure rollers. An M20×1.5 locking nut is fitted at the joint between the fixed and movable sections. After adjustment, tightening the nut locks the gap and prevents loosening during operation. The double pressure roller 502 and the triple pressure roller 503 are both cylindrical wheels with a diameter of 60mm and a width of 30mm. The wheel core is fitted to a 15mm diameter axle through a deep groove ball bearing. The axle is fixed on the bushing of the movable section of the first adjusting rod 501, and the pressure rollers can rotate flexibly around the axle. By rotating the hexagonal adjusting head of the movable section, the movable section can be extended or retracted, thereby adjusting the gap between the double and triple pressure rollers to accommodate steel bars with a diameter of 10-32mm.

[0029] The reinforcing bar 6 enters the device from the left side of the sheet metal casing 1, passing sequentially between the double pressure roller 502 and the triple pressure roller 503 of the first regulator 5, and between the upper single pressure roller 402 and the lower single pressure roller 403 of the second regulator 4, completing straightening under the squeezing action of each pressure roller. The button 7 is a self-resetting button of model LA42P-11, installed in the operating area on the right side of the front of the sheet metal casing 1. It is connected to the control circuit (including contactor and thermal relay) of the motor 8 via an RVV2×1.5 specification wire. Pressing the button controls the start and stop of the motor 8, realizing the start and stop operation of the device. In a specific embodiment, it also includes a housing 1; the drive device, the reinforcing bar straightening assembly, and the gear set are disposed in the housing 1; a button 7 for starting or stopping the drive device is provided on the housing 1. The housing is a sheet metal casing, welded from 3mm thick cold-rolled steel plate, with an overall rectangular structure. An M12 specification threaded seat is welded to the inner wall, serving as the outer shell structure of the entire device, providing fixed support and dustproof and collision-proof protection for internal components such as the motor and adjusting rod. Button 7 is a self-reset button of model LA42P-11, which is installed on the operating area of ​​the outer surface of the iron shell. It is connected to the motor control circuit through RVV2×1.5 wire and is used to control the start and stop of the motor.

[0030] In one specific embodiment, the middle part of the second adjusting rod is a splined shaft segment that matches the splined hole of the third adjusting gear. One end of the second adjusting rod is hinged to the hydraulic rod, and the other end is a splined shaft segment that mates with the splined hole of the second adjusting transmission gear. That is, it is configured as a splined shaft segment that matches the splined hole of the third adjusting gear 201. One end of the second adjusting rod is hinged to the hydraulic rod 301, and the other end is a splined shaft segment that is fixedly engaged with the splined hole of the second adjusting transmission gear. The extension and retraction of the hydraulic rod can drive the second adjusting rod to rotate around its fixed axis. Through the splined engagement between the second adjusting rod and the second adjusting transmission gear, the second adjusting transmission gear is driven to rotate synchronously, with a rotation angle range of 0-30°. The angle signal is monitored and fed back in real time by a protractor.

[0031] In one specific embodiment, the gear set includes a third adjusting gear 201, a motor gear 202, and an intermediate transmission gear 203; the motor gear 202 is connected to the output end of the drive device; the left gear ring of the intermediate transmission gear 203 meshes externally with the motor gear 202, and the right gear ring meshes externally with the third adjusting gear 201.

[0032] It should be noted that, in the specific implementation process, the gear set is located in the central transmission system area inside the sheet metal casing, including the third adjusting gear, the motor gear, and the intermediate transmission gear. All of these gears are installed on the fixed shaft via deep groove ball bearings and are interconnected through precise meshing to achieve power transmission and speed regulation. The motor gear 202 is a spur gear with a module of 2.5 and 20 teeth. The tooth surface is hardened to improve wear resistance. Its hub is tightly fitted to the output shaft of the motor 8 via a flat key and rotates synchronously with the motor output shaft. The intermediate transmission gear 203 is made of 40Cr material through integral forging and is a double-ring spur gear structure. Both sides of the ring gear have a module of 2.5 and 40 teeth, and it is mounted on a fixed shaft with a diameter of 25mm via deep groove ball bearings. The left gear ring meshes with the motor gear 202, with the center distance between the two gears strictly controlled at 75mm. The right gear ring meshes with the third adjusting gear 201, with the center distance set at 87.5mm. The double gear ring structure achieves power reduction and steering transmission. The third adjusting gear 201 is a spur gear with a module of 2.5 and 35 teeth. It is mounted on a fixed shaft with a diameter of 20mm via a deep groove ball bearing. Its hub is machined with a spline hole conforming to the GB / T1144-2001 standard, which is used to cooperate with the spline shaft section of the second adjusting rod 303 to realize the transmission of power from the gear to the adjusting rod.

[0033] Secondly, the present invention provides a method for operating a rebar straightening device, comprising the following steps: S110. Start the drive unit. The output shaft of the drive unit rotates the pulley assembly. The gear set drive includes a first adjuster 5 for preliminary straightening of the passing rebar 6, a second adjuster 4 for precise straightening of the passing rebar 6, and a third adjuster 3, forming a rebar straightening assembly. It should be noted that, for the gear set, the motor gear meshes tightly with the left gear ring of the intermediate transmission gear, and the right gear ring of the intermediate transmission gear meshes with the third adjusting gear. Power transmission and speed regulation are achieved through this three-stage transmission chain. After the motor's speed of 1450 r / min is transmitted, the speed of the third adjusting gear can be stabilized at 828.57 r / min, with a total transmission efficiency ≥0.91.

[0034] S120. The steel bar to be straightened is fed into the first adjuster 5. The second adjusting rod 303 rotates, driving the second adjusting transmission gear to rotate synchronously. The second adjusting transmission gear 404 rotates, causing the second adjusting head 401 to deflect, changing the distance between the upper single pressure roller 402 and the lower single pressure roller 403, thereby changing the squeezing pressure of the steel bar 6 between the double pressure roller 502 and the triple pressure roller 503, and achieving the initial straightening of the steel bar 6.

[0035] After initial straightening, S130 and steel bar 6 enter the second adjuster 4. The angle of the second adjusting rod 303 is measured in real time by the protractor 302. Based on the measured angle, the position and angle of the second adjusting rod 303 are controlled by the hydraulic rod 301. Thus, the distance between the upper single pressure roller 402 and the lower single pressure roller 403 is adjusted in real time by the second adjusting head 401 to achieve precise straightening of steel bar 6. S140. After straightening is completed, stop the drive device and reset to wait for the next operation.

[0036] In summary, after pressing the button to start the motor, the motor output shaft rotates, driving the motor gear to rotate synchronously. The rotation of the motor gear is transmitted sequentially to the intermediate transmission gear and the third adjusting gear. The third adjusting gear drives the second adjusting rod to move through a spline engagement. The second adjusting rod drives the second adjusting transmission gear to rotate, which causes the second adjusting head to deflect to adjust the distance between the upper and lower single pressure rollers. The steel bar first enters the first adjuster, where it is initially straightened between the double and triple pressure rollers through a preset spacing. Then it enters the second adjuster, where, based on the real-time bending condition of the steel bar, the distance between the upper and lower single pressure rollers is dynamically adjusted through the protractor monitoring and hydraulic rod control of the third adjuster. This allows for precise straightening of locally bent areas. After straightening is completed, pressing the button stops the motor, and the hydraulic rod resets to await the next operation.

[0037] In one specific embodiment, the method further includes acquiring the angle signal of the protractor 302; comparing the acquired angle signal with a preset angle value; and controlling the hydraulic rod 301 based on the comparison result. That is, the protractor monitors the angle of the second adjusting rod in real time. Based on the actual bending condition of the reinforcing bar (with a straightness error ≤0.5mm / m as the standard), the position and angle of the second adjusting rod are changed by controlling the extension and retraction of the hydraulic rod, indirectly adjusting the distance between the upper and lower single pressure rollers. The distance and angle satisfy a quantitative relationship: d = d0 - 0.05 × θ (d is the distance between the pressure rollers, d0 is the initial distance, and θ is the angle of the adjusting rod), to achieve the best straightening effect.

[0038] In one specific embodiment, before the steel bar to be straightened is fed into the first adjuster 5, the gear set drives the second adjusting rod 303 to move through spline engagement, so that the second adjusting rod 303 rotates around its fixed axis, adjusting the distance between the upper single pressure roller and the lower single pressure roller to the initial position.

[0039] In one specific embodiment, before the reinforcing bar to be straightened is fed into the first adjuster 5, the distance between the double pressure roller 502 and the triple pressure roller 503 is adjusted to match the diameter of the reinforcing bar by rotating the movable section of the first adjusting rod 501, and the distance is fixed by tightening the locking nut. Specifically, the distance between the double pressure roller and the triple pressure roller can be pre-adjusted according to the diameter of the reinforcing bar. During adjustment, the hexagonal adjusting head of the movable section of the first adjusting rod is rotated to achieve extension and retraction. After adjustment, the locking nut is tightened to lock the distance. When the reinforcing bar passes through it, it is squeezed to achieve initial straightening and eliminate overall bending deformation.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0041] Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within the invention. No appended diagram markings in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or systems stated in a system claim may also be implemented by a single unit or system through software or hardware.

[0043] However, those skilled in the art should understand that various modifications can be made to the rebar straightening device and rebar straightening apparatus proposed in this invention without departing from the scope of this invention. Therefore, the scope of protection of this invention should be determined by the content of the appended claims.

Claims

1. A rebar straightening device, characterized in that, include, A drive unit and a rebar straightening assembly, and a gear set connected to the output end of the drive unit and the input end of the rebar straightening assembly; The rebar straightening assembly includes a first adjuster for preliminary straightening of the passing rebar, a second adjuster for precise straightening of the passing rebar, and a third adjuster. The first adjuster includes a first adjusting rod and a double pressure roller and a triple pressure roller mounted on the first adjusting rod, wherein the distance between the double pressure roller and the triple pressure roller is adjustable; The second regulator includes a second adjusting head, an upper single pressure roller, a lower single pressure roller, and a second adjusting transmission gear. The upper and lower single pressure rollers are mounted on the second adjusting head. The rotation of the second adjusting transmission gear drives the second adjusting head to deflect synchronously, and the distance between the upper and lower single pressure rollers is changed through the eccentric shaft structure of the second adjusting head. The third adjuster includes a second adjusting rod, a hydraulic rod for driving the second adjusting rod to rotate, and a protractor for measuring the rotation angle of the second adjusting rod in real time. The extension and retraction of the hydraulic rod drives the second adjusting rod to rotate around its fixed axis. Through the spline engagement between the second adjusting rod and the second adjusting transmission gear, the second adjusting transmission gear is driven to rotate synchronously.

2. The rebar straightening device according to claim 1, characterized in that, It also includes a housing; the drive device, the rebar straightening assembly, and the gear set are disposed in the housing; A button for starting or stopping the drive device is provided on the housing.

3. The rebar straightening device according to claim 1, characterized in that, The middle part of the second adjusting rod is a splined shaft section that matches the splined hole of the third adjusting gear. One end of the second adjusting rod is hinged to the hydraulic rod, and the other end is a splined shaft section that mates with the splined hole of the second adjusting transmission gear.

4. The rebar straightening device according to claim 1, characterized in that, The gear set includes a third adjusting gear, a motor gear, and an intermediate transmission gear; the motor gear is connected to the output end of the drive device. The left gear ring of the intermediate transmission gear meshes externally with the motor gear, and the right gear ring meshes externally with the third adjusting gear.

5. The rebar straightening device according to claim 1, characterized in that, The edge of the second adjusting head is a fan-shaped structure of an eccentric shaft, and the upper single pressure roller and the lower single pressure roller are mounted on the eccentric shaft through bearings.

6. The rebar straightening device according to claim 1, characterized in that, The first adjusting rod of the first regulator is a telescopic structure, and the distance between the double pressure roller and the triple pressure roller is adjusted by the telescopic movement of the first adjusting rod.

7. A method for operating a steel bar straightening device according to any one of claims 1 to 6, characterized in that, Includes the following steps: Start the drive device, the output shaft of the drive device rotates to drive the gear set, the gear set drives the rebar straightening assembly including a first adjuster for preliminary straightening of the passing rebar, a second adjuster for precise straightening of the passing rebar, and a third adjuster; The steel bar to be straightened is fed into the first adjuster. The rotation of the second adjusting rod drives the second adjusting transmission gear to rotate synchronously. The rotation of the second adjusting transmission gear causes the second adjusting head to deflect, changing the distance between the upper single pressure roller and the lower single pressure roller, thereby changing the squeezing pressure of the steel bar between the double pressure roller and the triple pressure roller, and realizing the initial straightening of the steel bar. After initial straightening, the steel bars to be straightened enter the second adjuster. The angle of the second adjusting rod is measured in real time by a protractor. Based on the measured angle, the position and angle of the second adjusting rod are controlled by a hydraulic rod. In turn, the distance between the upper and lower single pressure rollers is adjusted in real time by the second adjusting head to achieve precise straightening of the steel bars. After straightening is completed, stop the drive device and reset it to await the next operation.

8. The operating method according to claim 7, characterized in that, It also includes, Obtain the angle signal from the protractor; Compare the acquired angle signal with the preset angle value; The hydraulic rod is controlled based on the comparison results.

9. The operating method according to claim 7, characterized in that, Before the steel bar to be straightened is fed into the first adjuster, the gear set drives the second adjusting rod to move through spline engagement, so that the second adjusting rod rotates around its fixed axis, adjusting the distance between the upper single pressure roller and the lower single pressure roller to the initial position.

10. The operating method according to claim 7, characterized in that, Before the steel bar to be straightened is fed into the first adjuster, the distance between the double pressure roller and the triple pressure roller is adjusted to match the diameter of the steel bar by rotating the movable section of the first adjusting rod, and the distance is fixed by tightening the locking nut.

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