Rack straightening, detecting and adjusting equipment

Abstract

The invention discloses rack straightening, detecting and adjusting equipment, relates to the technical field of machining, and aims to solve the problems of rotation safety risk, over-straightening and insufficient bearing capacity of a conveying mechanism in an existing rack straightening process. The equipment comprises a rack, a sectional type stepping conveyor, a rotating mechanism, a bending detection mechanism and a straightening device. The sectional type stepping conveyor is installed on the machine frame, and an interference-free working area is formed. The rotating mechanisms are symmetrically arranged on the two sides of the working area, inserting sleeves of the rotating mechanisms are connected with rotating motors through universal joints, elastic pressing pieces are arranged in the rotating mechanisms, and workpieces can be driven to rotate at different rotating speeds. The bending detection mechanism comprises an eddy current displacement sensor used for rapidly screening the jerk value and a multi-point laser displacement sensor used for precisely measuring the contour. And the straightening device carries out closed-loop quantitative pressure calibration on the workpiece according to detection data. Through rotation safety design and dual-mode detection, high efficiency, high precision and safety in the rack straightening process are achieved.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a rack straightening and adjustment device. Background Technology

[0002] In the automotive steering system manufacturing field, the rack, as a key transmission component, directly affects steering performance and safety due to its straightness accuracy. Currently, the straightening of automotive steering racks generally employs a combination of inspection, rotation, and local pressure straightening processes. Specifically, operators typically place the rack on a fixture or rotating tooling, using sensors to detect its radial runout during rotation to determine the location and degree of bending, and then applying pressure to the bent areas using hydraulic or pneumatic devices to straighten them.

[0003] However, this traditional process has several significant drawbacks in practical applications, which restrict processing efficiency and the yield of finished products.

[0004] First, there are safety and accuracy risks during the rotational detection process. When the rack itself has a large initial bend, high-speed rotation will generate severe radial runout and oscillation. This not only leads to large fluctuations and a low signal-to-noise ratio in the signal acquired by the sensor, affecting the accuracy of the bend calculation, but may also cause the rack to mechanically impact the rotational drive mechanism or surrounding detection components due to excessive oscillation amplitude. This risk can easily lead to damage to precision sensors, equipment downtime, or even secondary damage caused by impacts to the rack surface.

[0005] Secondly, there is a risk of over-straightening and reverse bending during the straightening process. Current straightening methods largely rely on operational experience or simple open-loop control, lacking precise feedback and closed-loop adjustment for controlling the downward pressure and holding time. During the straightening of protruding parts, excessive pressure or insufficient estimation of material springback can easily cause the rack to undergo new plastic deformation in the opposite direction of the original bend, i.e., over-straightening. This problem often traps the straightening process in an inefficient cycle of forward bending, straightening, reverse bending, and re-straightening, severely impacting production cycle time and material consistency.

[0006] Third, there is a rigidity deficiency in the conveying and positioning system. Traditional rack and pinion straightening systems often use rocker-type or lifting stepping conveyors to achieve inter-station transfer. These mechanisms are designed with intermittent motion accuracy in mind, and the rigidity and compressive strength of their supporting guide rails, connecting rods, or lifting units are often insufficient. When subjected to concentrated, strong downward pressure from the straightening unit, the entire conveying platform is prone to elastic deformation or even permanent damage, directly causing a slight displacement or deflection of the rack during straightening. This not only greatly affects the positioning accuracy and final effect of the straightening action, but also leads to accelerated wear of the conveying mechanism, inaccurate stepping accuracy, and high equipment maintenance costs in the long run. Summary of the Invention

[0007] To address the aforementioned problems, this application provides a rack straightening and adjustment device.

[0008] A rack and pinion straightening and adjustment device includes a frame, a segmented stepper conveyor, a rotating mechanism, a bending detection mechanism, and a straightening device. The segmented stepper conveyor is mounted on the frame and is used to transport workpieces, with a reserved working area in its center. The rotating mechanism is located on both sides of the working area along the length of the frame, and includes a displacement component, a rotary motor, and a connecting sleeve. The rotary motor is movably mounted via the displacement component, and the connecting sleeve is mounted on the output shaft of the rotary motor via a universal joint, and contains an elastic pressure plate for gripping the workpiece. The bending detection mechanism is located in the working area and is used to detect the bending data of the workpiece. The straightening device is mounted on the frame and is used to straighten the bent portions of the workpiece based on the bending data. The rotating mechanism can drive the workpiece to rotate at different speeds, and the elastic pressure plate is configured to grip the workpiece at low speeds and allow slippage at high speeds to limit its maximum speed.

[0009] Compared with existing technologies, by adopting the above technical solution, the equipment effectively solves the safety risks of severe vibration and equipment damage caused by high-speed rotation of large-bend workpieces by setting up a rotating mechanism with universal joints and elastic pressure plates. The elastic pressure plates limit the rotation speed through controllable slippage, while the universal joint is used to isolate radial impact. The combination of the two constitutes a safety protection mechanism, ensuring the safety of the testing process and the stability of the equipment.

[0010] Furthermore, the segmented stepping conveyor includes a first conveying mechanism and a second conveying mechanism arranged sequentially along the conveying direction, with the working area formed between them; both the first conveying mechanism and the second conveying mechanism include a stepping frame and a supporting frame, and the stepping frame is driven independently to achieve reciprocating stepping motion.

[0011] Compared with existing technologies, by adopting the above technical solution, using a separate, independently driven conveying mechanism with a reserved working area in the middle, the conveying frames at both ends can move back synchronously during detection and straightening, providing a space without mechanical obstruction for the sensor detection and straightening device to press down, avoiding signal interference and interference from moving parts, and improving detection accuracy and operational safety.

[0012] Furthermore, the bending detection mechanism is a multi-point laser displacement sensor, which is arranged below the working area along the width direction of the frame.

[0013] Compared with existing technologies, by adopting the above technical solution and horizontally arranging multi-point laser displacement sensors below the working area, precise height data of multiple points along a line on the bottom surface of the workpiece can be acquired simultaneously and non-contactly, even when the workpiece is stationary or rotating. By comparing and analyzing this data, the bending deflection and direction of the workpiece cross-section can be calculated, providing a data foundation for achieving high-precision online detection.

[0014] Furthermore, the working area is provided with fixed pressure blocks on both sides along the width direction of the frame, and the top of the pressure block is provided with a pressure groove for bearing the workpiece; the equipment also includes a lifting mechanism disposed between the pressure block and the rotating mechanism.

[0015] Compared with existing technologies, by adopting the above technical solution and setting a rigid pressure block as a fixed support point during straightening, the problem of deformation and reduced straightening accuracy caused by insufficient rigidity in traditional conveying mechanisms during downward pressure is solved. The lifting mechanism, as a transition mechanism, realizes the smooth transition of the workpiece between the three states of conveying and positioning, rotation detection, and rigid pressure bearing, ensuring the consistency of positioning between each process.

[0016] Furthermore, the displacement assembly includes a slide rail, a slider, and an adjusting cylinder. The rotary motor is mounted on the slider, and the adjusting cylinder drives the slider to move the rotary motor so that the workpiece can be inserted into or detached from the insertion sleeve.

[0017] Compared with existing technologies, the above-mentioned technical solution, through a displacement assembly consisting of a slide rail, a slider, and an adjusting cylinder, achieves precise linear movement of the rotary motor and the insertion sleeve. This enables the equipment to automatically complete the docking and separation actions with the workpiece, serving as a key mechanical interface to ensure the automated operation of the entire inspection and straightening process.

[0018] Furthermore, the rotation mechanism also includes a runout detection mechanism, which includes a bracket and an eddy current displacement sensor. The bracket is fixed to the slider of the displacement assembly, and the eddy current displacement sensor is used to detect the radial runout of the insert sleeve when the workpiece rotates.

[0019] Compared with existing technologies, by adopting the above technical solution, and by setting up an eddy current displacement sensor that moves with the rotating mechanism to monitor the runout of the insertion sleeve, and utilizing the runout transmission characteristics of the universal joint, an indirect and rapid measurement of the workpiece bending degree is achieved. This solution adds a rapid screening mode to the equipment, which can quickly determine whether the workpiece bending exceeds the limit, thus improving the screening efficiency of defective products.

[0020] Furthermore, the rotating mechanism is configured to drive the workpiece to rotate within the working area at a first rotational speed or a second rotational speed higher than the first rotational speed, and the elastic pressure plate is configured to grip the workpiece at the first rotational speed to prevent slippage, and to allow the workpiece to slip at the second rotational speed to limit its maximum rotational speed.

[0021] Compared with existing technologies, by adopting the above technical solution, combining the mechanical properties of the elastic pressure plate with a dual-speed strategy and matching different sensors, two working modes are constructed: rapid screening and precision detection. This system can efficiently divert and warn, and perform high-precision measurements on workpieces requiring straightening, achieving a balance between detection efficiency and accuracy.

[0022] Furthermore, the straightening device includes a straightening drive mechanism, a straightening cylinder, and a pressing head; the straightening drive mechanism drives the straightening cylinder to move along the width direction of the frame to directly above the bending point of the workpiece, and the straightening cylinder drives the pressing head to press down and straighten the workpiece placed on the pressure block.

[0023] Compared with existing technologies, by adopting the above technical solution, the straightening device achieves precise positioning through the drive mechanism and combines it with the laser sensor below for real-time online monitoring and feedback, forming a closed-loop control high-precision pressure calibration system. This solution can dynamically control the amount of pressure applied, ensuring proper straightening in one pass, and solving the technical problems of over-calibration or under-calibration that are prone to occur in traditional processes.

[0024] Furthermore, the elastic pressure plate is inclined toward its axis inside the insertion sleeve, so that the deeper the workpiece is inserted, the greater the clamping force of the elastic pressure plate on the workpiece.

[0025] Compared with existing technologies, by adopting the above technical solution, the inclined structure design of the elastic pressure plate increases its clamping force with the increase of insertion depth. This not only ensures sufficient static friction to prevent slippage during low-speed precision testing, but also sets an upper limit for the maximum clamping force, i.e. the slippage threshold, during high-speed rotation, which is the structural basis for realizing the speed limiting function.

[0026] Furthermore, the center height of the rotary motor and its output shaft is set to be higher than the conveying height of the workpiece on the segmented stepper conveyor.

[0027] Compared to existing technologies, by adopting the above-mentioned technical solution, the center of rotation is raised, maintaining a distance between the workpiece and the lower mechanism during clamping and rotation, thus providing sway space for its potentially large bending. This design avoids the risk of the rotating workpiece colliding with the lower conveying mechanism and other fixed components.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. By designing a universal joint and a controllable slippage elastic pressure plate in the rotating mechanism, a safety protection system is constructed, which reduces the safety risks to the equipment and the workpiece itself when large bending workpieces are rotated during inspection, and ensures the continuity of production.

[0029] 2. By combining a segmented conveying mechanism with rigid pressure blocks and integrating a dual-mode detection scheme, the entire process from conveying and detection to straightening is automated. This improves detection efficiency and straightening accuracy while effectively avoiding over-straightening.

[0030] 3. The various mechanisms of the equipment work together, the raised rotation center provides space for operation, and the closed-loop straightening control ensures the pressing accuracy, making the equipment safe, accurate and efficient. Attached Figure Description

[0031] Figure 1 It is a three-dimensional view of the equipment, mainly showing its overall structure; Figure 2 This is a partial view of the equipment, mainly showing the straightening device and the rotating mechanism; Figure 3 This is a partial view of the equipment, mainly showing the rotating mechanism; Figure 4 This is a partial view of the equipment, mainly showing the runout detection mechanism; Figure 5 This is a partial view of the equipment, mainly showing the elastic tablet press; Figure 6 This is a partial view of the equipment, mainly showing the multi-point laser displacement sensor.

[0032] Explanation of reference numerals in the attached drawings: 1. Segmented stepping conveyor; 10. Drive trough; 11. First stepping frame; 12. First bearing frame; 13. Drive device; 14. Second stepping frame; 15. Second bearing frame; 2. Straightening device; 21. Straightening drive mechanism; 22. Straightening cylinder; 23. Lower pressure head; 3. Frame; 31. Pressure block; 311. Pressure trough; 32. Rotary motor; 321. Universal joint; 322. Insert sleeve; 323. Elastic pressure plate; 33. Sliding pair; 34. Adjusting cylinder; 35. Support; 36. Eddy current displacement sensor; 41. Lifting cylinder; 42. Lifting block; 421. Slot; 43. Multi-point laser displacement sensor. Detailed Implementation

[0033] This invention provides a rack straightening detection and adjustment device, designed to perform bending detection and automatic straightening of long rod-shaped workpieces such as automotive steering racks. (Refer to...) Figure 1The system includes: a frame 3 serving as the overall support and mounting base; a segmented stepping conveyor 1 mounted on the frame 3 for conveying workpieces; a rotating mechanism located on both sides of the working area in the middle of the conveying path; a bending detection mechanism located below the working area; a straightening device 2 located above the working area; and a lifting mechanism and a pressure block 31 for assisting in workpiece positioning. All components work together to form an automated detection and straightening system.

[0034] Reference Figure 1 and Figure 2 The segmented stepping conveyor 1 is mounted on the frame 3. Its core design lies in its split structure and the reserved working area in the middle. Specifically, the conveyor consists of a first conveying mechanism and a second conveying mechanism arranged sequentially and with identical structures along the workpiece conveying direction, i.e., the length of the frame 3, with a specific distance between them to form an interference-free working area. The first conveying mechanism includes a first stepping frame 11 and a first supporting frame 12, and the second conveying mechanism includes a second stepping frame 14 and a second supporting frame 15. Each stepping frame has a V-shaped or U-shaped drive groove 10 for propelling the workpiece forward during the oscillation process.

[0035] Reference Figure 1 and Figure 2 Each stepping frame is driven by an independent drive unit 13, such as a crank-rocker mechanism driven by a servo motor, enabling precise reciprocating oscillation to achieve step-by-step conveying of the workpiece for forward movement, lowering, and return. The two conveying mechanisms can operate independently. The distance between the first and second conveying mechanisms is set slightly larger than the maximum swing amplitude of the front end of the first stepping frame 11 or the second stepping frame 14 during one swing stroke. This design allows the first stepping frame 11 and the second stepping frame 14 to swing synchronously away from each other when inspection or straightening is required, completely removing the load-bearing portion of their respective front ends from under the working area, thus creating space for subsequent inspection and straightening actions and ensuring interference-free inspection signals.

[0036] Reference Figure 3 and Figure 4 Two pressure blocks 31 are symmetrically fixedly installed on both sides of the frame 3 along the width direction of the working area. The top of the pressure block 31 is machined with a pressure groove 311, which is used to stably support the workpiece and withstand the downward pressure during the straightening process. Its effect is to provide a stable fulcrum and avoid the elastic deformation and accuracy inaccuracy problems caused by direct pressure in traditional conveying mechanisms.

[0037] Reference Figure 3 and Figure 4A lifting mechanism is provided between the pressure block 31 on each side and the rotating mechanism. The lifting mechanism includes a lifting cylinder 41 and a lifting block 42 fixed to the top of the cylinder piston rod. The lifting block 42 has a slot 421 for engaging the workpiece. After the workpiece is conveyed to the working area by the first conveying mechanism and falls into the pressure slots 311 of the two pressure blocks 31, the lifting cylinders 41 on both sides act synchronously, driving the lifting block 42 to rise. The workpiece is smoothly lifted from the pressure slot 311 through the slot 421, and the center line of the workpiece is raised to a height coaxial with the axis of the insertion sleeve 322 of the rotating mechanism. The lifting mechanism realizes the conversion of the workpiece from conveying positioning to rotation positioning.

[0038] Reference Figure 3 and Figure 4 The rotating mechanisms are symmetrically arranged at both ends of the working area along its length and are located outside the lifting mechanism. Each rotating mechanism mainly includes a displacement component, a rotary motor 32, and a plug-in sleeve 322.

[0039] Reference Figure 3 and Figure 4 The displacement assembly consists of a slide rail, a slider, and an adjusting cylinder 34. The slide rail is fixed to the frame 3, pointing towards the center of the frame 3. The rotary motor 32 is mounted on the slider via a base. The adjusting cylinder 34 drives the slider to move the entire rotary motor 32 unit along the slide rail, thereby achieving docking and separation with the workpiece.

[0040] Reference Figure 3 and Figure 4 The output shaft of the rotary motor 32 is connected to the insert sleeve 322 via a universal joint 321. When the clamped bent workpiece rotates, the resulting radial runout is absorbed by the universal joint 321, reducing the impact of radial force on the spindle bearing of the rotary motor 32.

[0041] Reference Figure 5 The insertion sleeve 322 is cylindrical, with one end open to receive the end of the workpiece. Inside, there is an elastic pressure plate 323, made of spring steel, with its free end inclined at a certain angle towards the sleeve's axis. When the end of the workpiece is inserted, it expands the elastic pressure plate 323, and the rebound force generated by the plate forms a clamping force on the workpiece; the deeper the insertion, the greater the clamping force. However, this clamping force has a design upper limit determined by the material's mechanical properties.

[0042] The synergistic effect of the elastic pressure plate 323 and the dual-speed configuration constitutes the control logic of this embodiment: Low-speed precision detection mode: 5-8 seconds / revolution is preferred. At this speed, the required driving torque is small, and the static friction provided by the elastic pressure plate 323 is sufficient to prevent slippage between the workpiece and the sleeve, ensuring that the workpiece and the motor rotate synchronously and smoothly, providing conditions for high-precision data acquisition.

[0043] Rapid screening mode: 1 second / revolution is preferred. At this speed, if the workpiece is significantly bent, the resistance torque generated by rotation may exceed the maximum static friction of the elastic pressure plate 323. In this case, the design allows for controllable slippage. Slippage effectively sets a mechanical speed limit for the workpiece's maximum rotational speed, actively suppressing excessively high speeds and preventing uncontrollable, severe vibrations caused by the high-speed rotation of the eccentric mass block, thus avoiding the risk of equipment damage and workpiece ejection.

[0044] Reference Figure 6 A multi-point laser displacement sensor 43 is horizontally mounted on the frame 3 below the working area along the width direction of the frame 3. It integrates multiple laser probes, enabling simultaneous measurement of the vertical distance between multiple points on a straight line along the bottom surface of the workpiece. By comparing the differences in data from each measuring point, the bending deflection and bending direction (convex) of the workpiece on that cross-section can be calculated in real time and non-contactly. When the workpiece rotates slowly, full circumferential data can be collected, and the straightness of the entire workpiece, the location of the maximum bending point, and the precise straightening and bending amount can be calculated.

[0045] Reference Figure 3 The runout detection mechanism is used for rapid screening. This mechanism includes a bracket 35 and an eddy current displacement sensor 36. The bracket 35 is fixedly mounted on the slider of the displacement assembly, thus moving with the rotary motor 32. The probe of the eddy current displacement sensor 36 is aligned with the outer cylindrical surface of the insert sleeve 322, preferably near the connection point of the universal joint 321. In rapid rotation mode, the bending runout of the workpiece is transmitted to the insert sleeve 322 through the universal joint 321. By monitoring the radial runout amplitude of the sleeve, the eddy current displacement sensor 36 can quickly determine whether the workpiece bending profile exceeds the limit within seconds, achieving efficient early warning.

[0046] Reference Figure 2 The straightening device 2 spans the frame 3 above the working area and mainly includes a straightening drive mechanism 21, a straightening cylinder 22, and a pressing head 23. After precision testing is completed and the maximum bending point is determined, the lifting mechanism lowers the workpiece back into the pressure groove 311 of the pressure block 31 to obtain absolutely stable support. Subsequently, the straightening drive mechanism 21 drives the straightening cylinder 22 to move directly above the maximum bending point. The straightening cylinder 22 drives the pressing head 23 to apply downward pressure. During this process, the multi-point laser displacement sensor 43 below performs real-time online monitoring and feeds back the real-time deformation data of the workpiece being pressed down to the control system. Based on this, the control system dynamically judges that once the data of each measuring point tends to be consistent, it immediately instructs the straightening cylinder 22 to retract, realizing closed-loop quantitative pressure straightening and avoiding over-straightening or under-straightening.

[0047] Reference Figure 3The centerline height of the output shaft of the rotary motor 32 is set to be significantly higher than the support height of the workpiece on the conveyor frame and within the pressure groove 311 of the pressure block 31. When the workpiece is lifted and docked with the rotating mechanism, its rotation axis is raised, and the workpiece is suspended in mid-air, with its rotational envelope space below and to the sides far from fixed components such as the frame 3 and the conveyor mechanism. This provides ample and safe sway margin for workpieces that may have significant initial bending during rotation, eliminating the risk of collisions with surrounding equipment.

[0048] The implementation principle of this application is as follows: When the segmented stepper conveyor 1 is started, its first conveying mechanism moves the rack workpiece to be inspected forward step by step through the reciprocating swing of the first stepper frame 11. When the workpiece is conveyed to the working area formed by the interval between the first conveying mechanism and the second conveying mechanism, it is precisely placed in the pressure groove 311 of the fixed pressure blocks 31 on both sides, completing the initial axial positioning.

[0049] The lifting mechanism begins operation, with the lifting cylinders 41 on both sides synchronously driving the lifting blocks 42 to rise. Through their slots 421, the workpiece is smoothly lifted from the pressure block 31 until its centerline is at the same height as the preset rotation axis of the rotating mechanism. Subsequently, the displacement component of the rotating mechanism activates, and the adjusting cylinder 34 pushes the slider along the slide rail, causing the rotary motor 32 and the insertion sleeve 322 connected via the universal joint 321 to move closer to the end of the workpiece, allowing both ends of the workpiece to insert into the insertion sleeve 322. Due to its inclined design, the elastic pressure plate 323 inside the insertion sleeve 322 generates a radial clamping force during workpiece insertion, achieving a flexible connection between the workpiece and the rotating drive component.

[0050] When a rapid initial assessment of the workpiece is required, the rotary motor 32 drives the workpiece to rotate at a relatively high second speed (e.g., approximately 1 revolution per second). If the workpiece has significant bending, the centrifugal force generated by the rotation will cause controllable relative sliding between the workpiece and the elastic pressure plate 323, thereby automatically limiting the maximum speed of the workpiece and preventing danger caused by violent jumping. Simultaneously, the eddy current displacement sensor 36, fixed to the slider of the displacement assembly, monitors in real time the radial displacement of the insertion sleeve 322, which jumps due to the bending of the workpiece. By determining whether this jump exceeds a preset threshold, the system can complete the assessment and early warning of the workpiece bending condition within seconds.

[0051] When precise straightening is required, the rotary motor 32 drives the workpiece to rotate at a relatively low initial speed (e.g., 5 to 8 seconds per revolution). At this low speed, the static friction provided by the elastic pressure plate 323 is sufficient to ensure that the workpiece and the insert sleeve 322 rotate synchronously and smoothly without slippage. Simultaneously, a multi-point laser displacement sensor 43, installed directly below the working area, continuously scans the bottom surface of the rotating workpiece, acquiring its full circumference and multi-section contour data. The control system analyzes and processes this data to accurately calculate the overall straightness error of the workpiece, the location of the maximum bending point, the bending direction, and the required straightening bending amount.

[0052] After precision testing, the lifting mechanism operates again, lowering the workpiece so that it accurately falls back into the pressure grooves 311 of the pressure blocks 31 on both sides, obtaining rigid support. Subsequently, the straightening device 2 is activated. The straightening drive mechanism 21, based on the bending point position data provided by the detection system, drives the straightening cylinder 22 to move along the width of the frame 3, ensuring that the lower pressure head 23 precisely aligns with the maximum bending point above the workpiece. The straightening cylinder 22 drives the lower pressure head 23 to apply pressure to the workpiece. During this process, the multi-point laser displacement sensor 43 performs real-time online monitoring, feeding back the deformation of the workpiece under pressure to the control system in real time. The control system dynamically adjusts the downward pressure based on the feedback data until the data at each point on the cross-section becomes consistent, indicating that the bending has been eliminated, and then controls the straightening cylinder 22 to retract.

[0053] Once the workpiece has passed the alignment test, it is picked up by the second stepping frame 14 of the second conveyor mechanism and conveyed out of the work area in a stepping manner, completing the entire processing flow. Subsequently, the system resets, and the first conveyor mechanism sends in the next workpiece, starting a new cycle.

[0054] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rack straightening and adjustment device, characterized in that, include: rack (3); A segmented stepping conveyor (1) is installed on the frame (3); A rotating mechanism is provided on both sides of the working area along the length of the frame (3); the rotating mechanism includes a displacement component, a rotary motor (32) and a plug sleeve (322). The rotary motor (32) is movably mounted on the frame (3) through the displacement component. The plug sleeve (322) is mounted on the output shaft of the rotary motor (32) through a universal joint (321) and has an elastic pressure plate (323) for clamping the workpiece inside. A bending detection mechanism is installed in the working area to detect bending data of a workpiece in a static or rotating state; A straightening device (2) is installed on the frame (3) and is used to straighten the bent parts of the workpiece.

2. The rack straightening and adjustment device according to claim 1, characterized in that, The segmented stepper conveyor (1) includes a first conveying mechanism and a second conveying mechanism arranged sequentially along the conveying direction, and the working area is formed between the first conveying mechanism and the second conveying mechanism; both the first conveying mechanism and the second conveying mechanism include a stepping frame and a supporting frame, and the stepping frame is driven independently to realize reciprocating stepping motion.

3. The rack straightening and adjustment device according to claim 2, characterized in that, The bending detection mechanism is a multi-point laser displacement sensor (43), which is located below the working area along the width direction of the frame (3).

4. The rack straightening and adjustment device according to claim 3, characterized in that, The working area is provided with fixed pressure blocks (31) on both sides along the width direction of the frame (3), and the top of the pressure block (31) is provided with a pressure groove (311) for bearing the workpiece; the equipment also includes a lifting mechanism disposed between the pressure block (31) and the rotating mechanism.

5. The rack straightening and adjustment device according to claim 4, characterized in that, The displacement assembly includes a slide rail, a slider, and an adjusting cylinder (34). The rotary motor (32) is mounted on the slider. The adjusting cylinder (34) drives the slider to move the rotary motor (32) so that the workpiece can be inserted into or removed from the insertion sleeve (322).

6. The rack straightening and adjustment device according to claim 5, characterized in that, The rotating mechanism also includes a runout detection mechanism, which includes a bracket (35) and an eddy current displacement sensor (36). The bracket (35) is fixed on the slider of the displacement assembly, and the eddy current displacement sensor (36) is used to detect the radial runout of the insert sleeve (322) when the workpiece rotates.

7. The rack straightening and adjustment device according to claim 6, characterized in that, The rotating mechanism is configured to drive the workpiece to rotate in the working area at a first speed or a second speed higher than the first speed, and the elastic pressure plate (323) is configured to grip the workpiece at the first speed to prevent slippage, and to allow the workpiece to slip at the second speed to limit its maximum speed.

8. The rack straightening and adjustment device according to claim 4, characterized in that, The straightening device (2) includes a straightening drive mechanism (21), a straightening cylinder (22), and a pressing head (23); the straightening drive mechanism (21) drives the straightening cylinder (22) to move along the width direction of the frame (3) to directly above the bending point of the workpiece, and the straightening cylinder (22) drives the pressing head (23) to press down and straighten the workpiece placed on the pressure block (31).

9. The rack straightening and adjustment device according to claim 1, characterized in that, The elastic pressure plate (323) is inclined toward its axis inside the insertion sleeve (322), so that the deeper the workpiece is inserted, the greater the clamping force of the elastic pressure plate (323) on the workpiece.

10. The rack straightening and adjustment device according to claim 1, characterized in that, The center height of the rotary motor (32) and its output shaft is set to be higher than the conveying height of the workpiece on the segmented stepper conveyor (1).

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