circularity correcting machine

Abstract

The roundness correcting machine comprises a base, a workpiece clamping mechanism and a workpiece loosening mechanism, the workpiece clamping mechanism comprises a plurality of clamping rods and a workpiece clamping plate, the workpiece clamping plate is connected with a servo motor for driving the workpiece clamping plate to rotate synchronously for measurement, and the workpiece clamping plate is used for rotating the part to be corrected to the pressing position of the pressing device; the clamping rods are installed on a cam and pass through the workpiece clamping plate for tightening the workpiece, the cam is connected with the workpiece clamping plate through a first tension spring and can make the clamping rods tighten the workpiece under the action of the first tension spring, the cam is installed on a fixed tooth plate, and the fixed tooth plate can rotate synchronously with the workpiece clamping plate; the workpiece loosening mechanism comprises a first cylinder and a fixed tooth plate sleeve, the fixed tooth plate sleeve is installed on the outer side of the fixed tooth plate and can drive the fixed tooth plate to rotate counterclockwise to loosen the workpiece, and the fixed tooth plate sleeve is connected with a cylinder joint on the first cylinder for driving the fixed tooth plate sleeve to act through a second tension spring.

Description

Technical Field

[0001] This invention belongs to the field of press fitting technology, specifically relating to a roundness calibration machine. Background Technology

[0002] Metal ring parts deform after heat treatment, leading to out-of-tolerance roundness, which fails to meet assembly accuracy requirements, affecting final product quality and causing a large number of scraps. Currently available products can only measure inner or outer diameter roundness, and the measurement results are unsatisfactory.

[0003] Currently, there are eight main types of mechanisms used in press-fitting roundness calibration in practical applications: servo presses, hydraulic presses, four-column presses, gantry hydraulic presses, manual presses, electric screw presses, pneumatic presses, and jack presses. For example, CN116020912A discloses an automatic roundness calibration machine that effectively solves the problem of high-precision automatic roundness calibration of metal ring workpieces. Its components include: a control cabinet bolted to a frame; a workpiece positioning and rotating device bolted to the center of the frame; a workpiece support device fixed to a fan-shaped support block on the frame; a pressurizing device bolted to a support plate on the frame; and inner and outer diameter measuring devices fixed to opposite sides of the frame. All mechanisms communicate with the control cabinet via a data bus. This structure uses a planetary clamping and releasing mechanism, which is quite complex, requires high precision in gear transmission, is difficult to manufacture, and has high production costs. Furthermore, the use of synchronous belt drives increases transmission errors. Summary of the Invention

[0004] In view of the problems existing in the above background technology introduction, the purpose of the present invention is to provide a roundness correction machine with simple structure, low cost, small error and high correction accuracy.

[0005] The technical solution adopted in this invention is:

[0006] A rounding machine includes a base on which a measuring device and a pressurizing device are mounted. The base is characterized by the following features: a workpiece clamping mechanism and a workpiece releasing mechanism are also mounted on the base. The workpiece clamping mechanism includes several clamping bars and a workpiece clamping plate. The workpiece clamping plate is connected to a servo motor that drives its rotation and can synchronously rotate the workpiece for measurement, then rotate the part to be rounded to the pressurizing position of the pressurizing device. The clamping bars are mounted on a cam and pass through the workpiece clamping plate to tighten the workpiece. The cam is connected to the workpiece clamping plate via a first tension spring and can cause the clamping bars to tighten the workpiece under the action of the first tension spring. The cam is mounted on a fixed toothed plate, which can rotate synchronously with the workpiece clamping plate. The workpiece releasing mechanism includes a first cylinder and a fixed toothed plate sleeve. The fixed toothed plate sleeve is mounted on the outside of the fixed toothed plate and can drive the fixed toothed plate to rotate counterclockwise, thereby causing the clamping bars to release the workpiece. The fixed toothed plate sleeve is connected to a cylinder connector on the first cylinder that drives the fixed toothed plate through a second tension spring.

[0007] Furthermore, the servo motor is connected to the workpiece clamping plate via a transmission assembly. The transmission assembly includes a coupling connected to the output shaft of the servo motor. A rotating mandrel is connected to the coupling. The rotating mandrel is rotatably mounted on a rotating mandrel seat, which is fixed to a base. The rotating mandrel is fixedly connected to the workpiece clamping plate.

[0008] Furthermore, the fixed toothed plate is fitted outside the rotating mandrel, and a first bearing is provided between the fixed toothed plate and the rotating mandrel so that they can rotate relative to the rotating mandrel.

[0009] Furthermore, the fixed toothed plate sleeve is connected to the positioning pin seat by a toothed plate sleeve positioning pin and can rotate along the toothed plate sleeve positioning pin.

[0010] Furthermore, the fixed toothed plate and the fixed toothed plate sleeve are configured with gear engagement. The internal teeth of the fixed toothed plate sleeve are helical teeth. When the fixed toothed plate sleeve is stationary and the fixed toothed plate rotates, it can push the fixed toothed plate sleeve outward and slide along it. When the fixed toothed plate sleeve rotates, it can mesh with the fixed toothed plate and drive the fixed toothed plate to rotate.

[0011] Furthermore, the workpiece clamping plate has several waist-shaped grooves, and the clamping rod passes through the waist-shaped grooves and can move within the waist-shaped grooves to tighten or loosen the workpiece.

[0012] Furthermore, the workpiece clamping plate is provided with a workpiece pad for adjusting the height position of the workpiece.

[0013] Furthermore, the measuring device includes a movable support and an equidistant measuring rod. The movable support is connected to the ball screw via a lead screw connecting plate, allowing it to move up and down along the ball screw. The ball screw is connected to a stepper motor that drives its rotation. The stepper motor is fixed to the base via a column. The equidistant measuring rod is mounted on the movable support in an adjustable position and can move up and down with the movable support. The equidistant measuring rod is connected to a second cylinder that drives it to move down for measurement. The second cylinder is fixed to the movable support. A pneumatic sensor for data acquisition is installed on the movable support, and the pneumatic sensor is connected to the equidistant measuring rod.

[0014] Furthermore, the column is symmetrically provided with linear slide rails, and the lead screw connecting plate is fixedly connected to the slider that can move up and down along the linear slide rails to ensure the stability of the moving bracket when moving up and down.

[0015] Furthermore, the pressurizing device includes a fixed pressure head for side positioning of the workpiece and a workpiece pressure head for side pressure on the workpiece. The fixed pressure head is fixed on the base and located on one side of the workpiece clamping mechanism, while the workpiece pressure head is located on the other side of the workpiece clamping mechanism and connected to a hydraulic cylinder that drives it to move and apply pressure.

[0016] Compared with the prior art, the significant advantages of this invention include:

[0017] 1. It can automatically detect and press-fit;

[0018] 2. The operation is simple and convenient, reducing labor intensity;

[0019] 3. Quality is more guaranteed and controllable, and it has error-proofing features;

[0020] 4. Compared to the previous method of operators inspecting, calibrating, and inspecting at different workstations, efficiency is increased by more than 60%, and operation is safer. 5. The core component is the workpiece release and clamping device. A fixed toothed plate and a fixed toothed plate sleeve are fitted on the rotating spindle. The fixed toothed plate sleeve is pushed to rotate counterclockwise by a cylinder. The cam on the fixed toothed plate drives the clamping bar to retract along the waist-shaped groove on the workpiece clamping plate, thus releasing the workpiece. After the cylinder retracts, the spring on the workpiece clamping plate pulls the cam on the fixed toothed plate to rotate clockwise. The clamping bar on the cam moves along the waist-shaped groove on the workpiece clamping plate to clamp the workpiece. At the same time, the rotation of the workpiece is directly driven by a servo motor, resulting in small errors, simple structure, and low processing costs. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the workpiece clamping mechanism, workpiece releasing mechanism, and pressurizing device of the present invention. Figure 1 .

[0023] Figure 3 This is a schematic diagram of the workpiece clamping mechanism, workpiece releasing mechanism, and pressurizing device of the present invention. Figure 2 .

[0024] Figure 4 This is a top view of the workpiece clamping mechanism, workpiece releasing mechanism, and pressurizing device of the present invention.

[0025] Figure 5 This is a cross-sectional structural diagram of the workpiece clamping mechanism of the present invention.

[0026] Figure 6 This is a cross-sectional structural diagram of the workpiece clamping mechanism and the pressure device of the present invention.

[0027] Figure 7 This is a schematic diagram of the measuring device of the present invention.

[0028] Figure 8 This is a cross-sectional structural schematic diagram of the measuring device of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] See Figure 1-8 This embodiment provides a rounding machine, including a base 50. A measuring device and a pressurizing device are mounted on the base 50. A workpiece clamping mechanism and a workpiece releasing mechanism are also mounted on the base 50. The workpiece clamping mechanism includes several clamping bars 60 and a workpiece clamping plate 29. The workpiece clamping plate 29 is connected to a servo motor 48 that drives its rotation and can drive the workpiece 24 to rotate synchronously. After measurement, the part to be rounded is rotated to the pressurizing position of the pressurizing device. The clamping bars 60 are mounted on a cam 32 and pass through the workpiece clamping plate 29 to tension the workpiece 24. The cam 32 is connected to the workpiece clamping plate 29 via a first tension spring 61. The clamping bar 60 can tighten the workpiece 24 under the action of the first tension spring 61. The cam 32 is mounted on the fixed tooth plate 36, which can rotate synchronously with the workpiece clamping plate 29. The workpiece release mechanism includes a first cylinder 33 and a fixed tooth plate sleeve 58. The first cylinder 33 is mounted on the base 50 through a cylinder seat 37. The fixed tooth plate sleeve 58 is mounted on the outside of the fixed tooth plate 36 and can drive the fixed tooth plate 36 to rotate counterclockwise, thereby driving the clamping bar 60 to release the workpiece 24. The fixed tooth plate sleeve 58 is connected to the cylinder connector 35 on the first cylinder 33 that drives the fixed tooth plate sleeve 58 through the second tension spring 64.

[0034] In this embodiment, the servo motor 48 is connected to the workpiece clamping plate 29 via a transmission assembly. The servo motor 48 is mounted below the base 50 via a Z-shaped support 47. The transmission assembly includes a coupling 46 connected to the output shaft of the servo motor 48. The coupling 46 is connected to the rotating spindle 40 via a first round nut 45. The rotating spindle 40 is rotatably mounted on a rotating spindle seat 41 and a deep groove bearing 42 is installed axially between the rotating spindle seat 41 and the rotating spindle seat 41. An O-ring 43 is installed radially between the rotating spindle 40 and the rotating spindle seat 41. A thrust ball bearing 44 is provided between the rotating spindle seat 41 and the first round nut 45. The rotating spindle seat 41 is fixed on the base 50. The rotating spindle 40 and the workpiece clamping plate 29 are fixedly connected via a keyway and a flat key 27. After placing a shim 26 on the upper end of the rotating spindle 40, it is locked with screws.

[0035] In this embodiment, the fixed toothed plate 36 is fitted onto the rotating spindle 40. A first bearing 39 is provided between the fixed toothed plate 36 and the rotating spindle 40, allowing it to rotate relative to the rotating spindle 40. The first bearing 39 can be an angular contact bearing. A keyway transition sleeve 28 is provided on the rotating spindle 40 between the workpiece clamping plate 29 and the first bearing 39. The cam 32 is connected to the fixed toothed plate 36 via a cam positioning pin 30. A positioning pin washer 34 is provided between the cam positioning pin 30 and the fixed toothed plate 36. An angular contact bearing 31 is provided between the cam 32 and the cam positioning pin 30.

[0036] In this embodiment, the fixed toothed plate sleeve 58 is connected to the positioning pin seat 57 via a toothed plate sleeve positioning pin 59 and can rotate along the toothed plate sleeve positioning pin 59. The positioning pin seat 57 is fixed to the base 50. Specifically, the fixed toothed plate sleeve 58 has an annular waist hole 65. The toothed plate sleeve positioning pin 59 passes through the annular waist hole 65 and connects to the positioning pin seat 57, thereby restricting the large radial movement of the fixed toothed plate sleeve 58. The fixed toothed plate sleeve 58 can move radially relative to the positioning pin seat 57 to facilitate the sliding of the fixed toothed plate 36 along the fixed toothed plate sleeve 58. At the same time, the fixed toothed plate sleeve 58 can rotate circumferentially along the toothed plate sleeve positioning pin 59 under the drive of the first cylinder 33, thereby driving the fixed toothed plate 36 to rotate. The fixed toothed plate 36 and the fixed toothed plate sleeve 58 are configured with gears. The internal teeth of the fixed toothed plate sleeve 58 are helical teeth, and the fixed toothed plate 36 has external teeth. When the fixed toothed plate sleeve 58 is stationary and the fixed toothed plate 36 rotates, it can slightly push the fixed toothed plate sleeve 58 outward and slide along it. When the fixed toothed plate sleeve 58 rotates, it can mesh with the fixed toothed plate 36 and drive the fixed toothed plate 36 to rotate.

[0037] In this embodiment, the workpiece clamping plate 29 has several oblong grooves 66. The clamping rod 60 passes through the oblong grooves 66 and can move within the oblong grooves 66 to tighten or loosen the workpiece 24. When tightening, it is pulled tight by a first tension spring 61. The workpiece clamping plate 29 is provided with a spring hook 62 connected to the first tension spring 61. The workpiece clamping plate 29 is provided with a workpiece pad 25 for adjusting the height of the workpiece 24. The workpiece pad 25 is connected by a workpiece pad positioning pin 38.

[0038] The measuring device described in this embodiment includes a movable support 18 and an equidistant measuring rod 23. The movable support 18 is connected to the ball screw 10 via a lead screw connecting plate 12, which can move up and down along the ball screw 10. The ball screw 10 is connected to a stepper motor 1 that drives its rotation. The stepper motor 1 is mounted on a column 9 via a stepper motor seat 2. The column 9 is fixed on a base 50. Linear slide rails 15 are symmetrically arranged on the column 9. The lead screw connecting plate 12 is fixedly connected to a slider that can move up and down along the linear slide rails 15, ensuring the stability of the movable support 18 in moving up and down. A diaphragm coupling 3 is provided between the ball screw 10 and the stepper motor 1, and the ball screw 10 and the diaphragm coupling 3 are connected by a second round nut 4. A bearing seat 6 is provided on the column 9, and a bearing seat pad 8 is also provided between the bearing seat 6 and the column 9. A tapered roller bearing 7 is provided between the ball screw 10 and the bearing seat 6, and a bearing washer 5 is provided between the tapered roller bearing 7 and the second round nut 4. The equidistant measuring rod 23 is mounted on the movable bracket 18 in an adjustable position via a third tension spring 19 and can move up and down with the movable bracket 18. A deep groove ball bearing 20 is provided between the equidistant measuring rod 23 and the movable bracket 18, and the deep groove ball bearing 20 is mounted on the movable bracket 18 via a bearing mandrel 21. The equidistant measuring rod 18 is connected to the second cylinder 11, which drives it to move downward for measurement, via a small cylinder connector 22. The second cylinder 11 is fixed to the movable support 18 via a limiting block 14. A pneumatic sensor 17 for data acquisition is installed on the movable support 18. Specifically, a shim block 16 is provided on the movable support 18. The pneumatic sensor 17 is fixed to the shim block 16 via a sensor fixing clip 13. The pneumatic sensor 17 is connected to the equidistant measuring rod 18.

[0039] The pressurizing device described in this embodiment includes a fixed pressure head 67 for side positioning of the workpiece and a workpiece pressure head 56 for applying pressure to the workpiece from the side. The fixed pressure head 67 is fixed to the base 50 by a fixed seat 63 and is located on one side of the workpiece clamping mechanism. The workpiece pressure head 56 is located on the other side of the workpiece clamping mechanism and is connected to a hydraulic cylinder 51 that drives it to move and apply pressure. The hydraulic cylinder 51 is fixed to the base 50 by a hydraulic cylinder seat 49 and is connected to a hydraulic station by an oil pipe. The hydraulic cylinder 51 is a hydraulic cylinder with a magnetic ring and has a hydraulic cylinder connector 52 at its front end. The workpiece pressure head 56 is connected to a movable seat 55. The movable seat 55 has a movable seat connector 54, which is connected to the hydraulic cylinder connector 52. A pressure sensor 53 is provided between the hydraulic cylinder connector 52 and the movable seat connector 54. The function of the pressure sensor 53 is to allow observation of the force change on the display.

[0040] In this embodiment, the servo motor 48, the first cylinder 33, the second cylinder 11, the stepper motor 1, and the hydraulic cylinder 51 are all electrically connected to the control panel. Various inductive switches are also provided; if a signal is not received, an alarm will sound or the system will not operate. The extension and retraction of the pistons in each cylinder and hydraulic cylinder, as well as the starting of the motors, can be manually performed. Each action is controlled by PLC programming, and pneumatic solenoid valves control the movement of each cylinder. The electrical box is fixed to the side of the worktable and contains a PLC, small relays, AC contactors, pneumatic solenoid valves, and various types of switches. The control panel needs to be rotated for ease of operation. The hydraulic station's inlet and outlet oil pipes are connected to the corresponding inlet and outlet of the hydraulic cylinders. The workpiece rotation servo motor can only rotate counterclockwise.

[0041] The specific operating steps for using this invention are as follows:

[0042] 1. After confirming that the machine tool is in the normal reset state, the employee loads workpiece 24 and presses the start button;

[0043] 2. The first cylinder 33 retracts, and the clamping bar 60 tightens the workpiece 24 under the action of the first tension spring 61;

[0044] 3. After the sensor switch of the first cylinder 33 receives the return signal, the stepper motor 1 starts, and the moving bracket 18 moves down into place along with the lead screw connecting plate 12. Then the piston of the second cylinder 11 extends. After the piston extension sensor switch of the second cylinder 11 receives the signal, the servo motor 48 rotates counterclockwise.

[0045] 4. When the servo motor 48 rotates counterclockwise, the signal received by the pneumatic sensor 17 is processed by the program software, and the servo motor 48 stops the workpiece 24 at the highest point of the inner hole runout in the direction of the moving seat 55.

[0046] 5. The piston of the first cylinder 33 extends and drives the fixed toothed plate sleeve 58 to rotate counterclockwise, and at the same time pushes the fixed toothed plate 36 to rotate counterclockwise. The cam 32 on the fixed toothed plate 36 drives the clamping bar 60 on the cam 32 to retract along the waist-shaped groove on the workpiece clamping plate 29, thereby releasing the workpiece 24.

[0047] 6. When the piston of the second cylinder 11 retracts, the corresponding induction switch receives the signal and the stepper motor 1 starts in reverse, and the moving bracket 18 moves upward to the original position along with the lead screw connecting plate 12.

[0048] 7. The piston of the hydraulic cylinder 51 extends and pushes the workpiece pressure head 56 on the moving seat 55 to start pressing the workpiece 24, and then retracts (at this time, the pressure of the hydraulic cylinder 51 is the initial set value).

[0049] 8. Repeat steps 2-7. If the roundness of the workpiece does not meet the requirements, continue pressing and increase the automatic pressing force each time until the roundness of the workpiece is met (there is a limit pressing position).

[0050] 9. Remove workpiece 24 and proceed to process the next piece.

[0051] This invention enables automatic detection and pressing; it is simple and convenient to operate, reducing labor intensity; quality is more guaranteed and controllable, and it has error prevention functions; compared with the previous method of operators inspecting at different workstations, calibrating, and inspecting, efficiency is increased by more than 60%, and operation is safer; the core component is the workpiece release and clamping device. A fixed toothed plate on the rotating spindle cooperates with a fixed toothed plate sleeve. The fixed toothed plate sleeve is pushed to rotate counterclockwise by a cylinder, and the cam on the fixed toothed plate drives the clamping bar to retract along the waist-shaped groove on the workpiece clamping plate to release the workpiece; after the cylinder retracts, the spring on the workpiece clamping plate pulls the cam on the fixed toothed plate to rotate clockwise, and the clamping bar on the cam moves along the waist-shaped groove on the workpiece clamping plate to clamp the workpiece. At the same time, the rotation of the workpiece is directly driven by a servo motor, resulting in small errors, simple structure, and low processing costs.

Claims

1. A roundness tester comprising a base, a measuring device and a pressurizing device mounted on the base, characterized in that: The base is also equipped with a workpiece clamping mechanism and a workpiece releasing mechanism. The workpiece clamping mechanism includes several clamping bars and a workpiece clamping plate. The workpiece clamping plate is connected to a servo motor that drives it to rotate and can drive the workpiece to rotate synchronously for measurement, and then rotate the part that needs to be rounded to the pressure position of the pressure device. The clamping bars are mounted on a cam and pass through the workpiece clamping plate to tighten the workpiece. The cam is connected to the workpiece clamping plate through a first tension spring and can cause the clamping bars to tighten the workpiece under the action of the first tension spring. The cam is mounted on a fixed toothed plate and the fixed toothed plate can rotate synchronously with the workpiece clamping plate. The workpiece releasing mechanism includes a first cylinder and a fixed toothed plate sleeve. The fixed toothed plate sleeve is mounted on the outside of the fixed toothed plate and can drive the fixed toothed plate to rotate counterclockwise, thereby causing the clamping bars to release the workpiece. The fixed toothed plate sleeve is connected to the cylinder connector on the first cylinder that drives the fixed toothed plate to move through a second tension spring.

2. The roundness broacher of claim 1, wherein: The servo motor is connected to the workpiece clamping plate via a transmission assembly. The transmission assembly includes a coupling connected to the output shaft of the servo motor. A rotating mandrel is connected to the coupling. The rotating mandrel is rotatably mounted on a rotating mandrel seat, which is fixed to a base. The rotating mandrel is fixedly connected to the workpiece clamping plate.

3. The roundness broacher of claim 2, wherein: The fixed toothed plate is fitted outside the rotating mandrel, and a first bearing is provided between the fixed toothed plate and the rotating mandrel so that they can rotate relative to the rotating mandrel.

4. The cylindricity measuring machine of claim 1, wherein: The fixed toothed plate sleeve is connected to the positioning pin seat by a toothed plate sleeve positioning pin and can rotate along the toothed plate sleeve positioning pin.

5. The cylindricity measuring machine of claim 1, wherein: The fixed toothed plate and the fixed toothed plate sleeve are configured with gear engagement. The internal teeth of the fixed toothed plate sleeve are helical teeth. When the fixed toothed plate sleeve is stationary and the fixed toothed plate rotates, it can push the fixed toothed plate sleeve outward and slide along it. When the fixed toothed plate sleeve rotates, it can mesh with the fixed toothed plate and drive the fixed toothed plate to rotate.

6. The roundness-adjusting machine according to claim 1, characterized in that: The workpiece clamping plate has several waist-shaped grooves, and the clamping rod passes through the waist-shaped grooves and can move within the waist-shaped grooves to tighten or loosen the workpiece.

7. The roundness-adjusting machine according to claim 1, characterized in that: The workpiece clamping plate is provided with a workpiece pad for adjusting the height and position of the workpiece.

8. The roundness-adjusting machine according to claim 1, characterized in that: The measuring device includes a movable support and an equidistant measuring rod. The movable support is connected to the ball screw via a lead screw connecting plate, allowing it to move up and down along the ball screw. The ball screw is connected to a stepper motor that drives its rotation. The stepper motor is fixed to a base via a column. The equidistant measuring rod is adjustablely mounted on the movable support and can move up and down with the movable support. The equidistant measuring rod is connected to a second cylinder that drives it to move down for measurement. The second cylinder is fixed to the movable support. A pneumatic sensor for data acquisition is installed on the movable support, and the pneumatic sensor is connected to the equidistant measuring rod.

9. The roundness-adjusting machine according to claim 8, characterized in that: The column is symmetrically equipped with linear slide rails, and the lead screw connecting plate is fixedly connected to the slider that can move up and down along the linear slide rails to ensure the stability of the moving bracket when moving up and down.

10. The roundness-adjusting machine according to claim 1, characterized in that: The pressurizing device includes a fixed pressure head for side positioning of the workpiece and a workpiece pressure head for side pressure on the workpiece. The fixed pressure head is fixed on the base and located on one side of the workpiece clamping mechanism, while the workpiece pressure head is located on the other side of the workpiece clamping mechanism and connected to a hydraulic cylinder that drives it to move and apply pressure.

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