A straightening device and a straightening method for a cylindrical workpiece

Abstract

The present invention discloses a straightening device and a straightening method for a cylindrical workpiece, wherein the straightening device comprises a clamping drive unit and a detection and straightening unit, and the straightening method comprises the following steps: S1, real-time detection and recording of the runout value of the workpiece at each position in its axial direction; S2, obtaining the first position with the largest current runout value, and straightening the first position; S3, obtaining the second position with the largest current runout value, and straightening the second position; S4, repeating step S3 until the runout value at any position of the workpiece is less than a preset value. In the present application, detection and straightening are performed simultaneously to avoid the phenomenon of low efficiency and deviation in straightening caused by the asynchrony between straightening and detection, and a heating element is provided, and while straightening the position, the heating element is aligned with the position for heating, so as to reduce deformation resistance, improve plastic forming properties, and avoid rebound after straightening.

Description

Technical Field

[0001] The invention relates to the technical field of straightening a cylindrical workpiece, and in particular to a straightening device and a straightening method for a cylindrical workpiece. Background Art

[0002] Cylindrical workpieces, such as screws, transmission shafts and other parts, are frequently used transmission components, and their main function is to transmit force. During use, due to excessive force, the workpiece may bend, affecting the use of the workpiece. Its straightness must meet certain requirements to work properly. Therefore, it is necessary to use a straightening device to straighten the workpiece.

[0003] However, the existing workpiece straightening has the following defects: First, it is impossible to detect the runout value of the current position in real time during straightening, and it is always detected before straightening, which leads to deviations in the straightening results, and it is carried out in multiple steps, resulting in extremely low efficiency; second, when straightening at a certain position, it is impossible to know whether the runout value of the current position meets the requirements, and it can only be re-tested after the straightening is completed; third, during the straightening process at a certain position, the runout value of the area near the position changes accordingly, and it is impossible to ensure that the runout values ​​of all positions meet the requirements; fourth, the current straightening process is carried out at room temperature, the ability to resist deformation still exists, and it is very easy to rebound after straightening. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a straightening device and a straightening method for a cylindrical workpiece, so as to solve the problems in the prior art of the detection and straightening of the runout value of the cylindrical workpiece being out of sync, resulting in deviation in the straightening result and low efficiency.

[0005] The technical solution adopted by the present invention to solve the technical problem is a straightening device for a cylindrical workpiece, comprising:

[0006] A clamping drive unit, comprising at least one clamping hand for clamping and driving the workpiece to rotate;

[0007] The detection and straightening unit comprises: a slider which can slide along the axial direction of the workpiece and is provided with a straightening surface which can abut against the side wall of the workpiece; a detection block which can be floatably arranged on the slider and abut against the side wall of the workpiece; and a heating element which is rotatably connected to the slider and is rotated to move the heating element closer to or toward the workpiece.

[0008] Furthermore, the straightening surface is a 1 / 4 arc surface.

[0009] Furthermore, the straightening device includes a first detection and straightening unit and a second detection and straightening unit, and is further provided with a first driving rod and a second driving rod, the first driving rod is fixedly connected to the first detection and straightening unit, and the second driving rod is fixedly connected to the second detection and straightening unit.

[0010] Further, the first driving rod is slidably connected to the second detection and straightening unit, and the second driving rod is slidably connected to the first detection and straightening unit.

[0011] Furthermore, the first detection and straightening unit comprises a first sliding block, and the first sliding block is provided with a first fixing through hole and a first sliding through hole;

[0012] The second detection and straightening unit comprises a second slider, and the second slider is provided with a second fixed through hole and a second sliding through hole;

[0013] A first fixing member is fixedly disposed on the first driving rod, the first fixing member is fixedly connected to the first fixing through hole, and the first driving rod is slidably disposed in the second sliding through hole;

[0014] The second driving rod is fixedly provided with a second fixing piece, the second fixing piece is fixedly connected to the second fixing through hole, and the second driving rod is slidably arranged in the first sliding through hole.

[0015] Furthermore, the detection and straightening unit further comprises: a first fixed block arranged on the sliding block, a guide rail being arranged on the first fixed block, and a displacement sensor being arranged on the guide rail; the detection block slides along the guide rail and abuts against or separates from the displacement sensor.

[0016] Furthermore, a floating rod is fixedly connected to the detection block, and a spring is provided on the floating rod;

[0017] A second fixing block is provided on the first fixing block, one end of the floating rod passes through the second fixing block and is slidably connected to the second fixing block, one end of the spring abuts against the floating rod, and the other end abuts against the second fixing block;

[0018] A third fixing block is also provided on the first fixing block, and an adjusting screw is threadedly connected to the third fixing block. The adjusting screw can abut against or separate from a side of the detection block away from the floating rod.

[0019] Furthermore, a straightening method for a cylindrical workpiece is disclosed, which is applied to the straightening method for a cylindrical workpiece, and comprises the steps of:

[0020] S1. Real-time detection and recording of the runout value of the workpiece at each position in its axial direction;

[0021] S2, obtaining the first position with the largest current jitter value, and aligning the first position;

[0022] S3, obtaining the second position with the largest current jitter value, and aligning the second position;

[0023] S4. Repeat step S3 until the runout value at any position of the workpiece is less than a preset value.

[0024] Furthermore, the workpiece is evenly divided into a plurality of areas to be inspected along its axial direction, and further comprises the steps of:

[0025] A1. Real-time acquisition and recording of the runout value of each position of each area to be inspected; wherein a detection and straightening unit is respectively provided in each area to be inspected, and each of the sliders slides in the corresponding area to be inspected;

[0026] A2, obtaining the first position with the largest current jitter value in each area to be inspected, and simultaneously aligning the first positions of multiple areas to be inspected;

[0027] A3, obtaining the second position with the largest current jitter value in each area to be inspected, and aligning the second positions of multiple areas to be inspected at the same time;

[0028] A4. Repeat step A3 until the jitter value at any position of each area to be inspected is less than a preset value.

[0029] Furthermore, in steps S2-S4 and A2-A4, both include: obtaining the jitter value of the current position in real time, and determining whether the jitter value of the current position is less than a preset value, if so, proceeding to the next step or ending, if not, continuing to straighten until the jitter value is less than the preset value and then proceeding to the next step or ending.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] (1) Inspection and straightening are carried out simultaneously to avoid the phenomenon that straightening and inspection are not synchronized, resulting in low efficiency and deviation in straightening.

[0032] (2) The position of the maximum runout value is not determined by the first detection. After the last straightening is completed, the slider will slide along the axial direction of the workpiece and re-detect the runout values ​​of all positions on the workpiece to avoid the runout values ​​of other positions changing during the straightening process at a certain position and affecting the accuracy of the straightening result.

[0033] (3) A heating element is provided. While straightening the position, the heating element is aimed at the position for heating, thereby reducing deformation resistance, improving plastic forming properties, and avoiding springback after straightening.

[0034] (4) The workpiece is divided into a plurality of inspection areas along its axis, and a detection and straightening unit is set in each inspection area to obtain the position with the largest runout value in each inspection area, and straighten each position with the largest runout value at the same time, until the runout values ​​of all positions in each inspection area are less than the preset value, the straightening of all positions on the workpiece can be completed, which greatly shortens the time required for straightening and improves the straightening efficiency.

[0035] (5) Each slider can be controlled to slide independently, so that each slider can slide to any position in the inspection area at the same time for inspection and alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the straightening method in the embodiment;

[0037] Figure 2 It is a structural schematic diagram of the straightening device in the embodiment;

[0038] Figure 3 It is a structural schematic diagram of multiple detection and straightening units in the embodiment;

[0039] Figure 4 A schematic structural diagram of one viewing angle of a detection and straightening unit in an embodiment;

[0040] Figure 5 is a structural schematic diagram of another viewing angle of the detection and straightening unit in the embodiment;

[0041] Figure 6 This is a schematic diagram of the structure of the detection and straightening unit in the embodiment after the slider is removed;

[0042] In the figure:

[0043] 100, detection and straightening unit; 110, slider; 120, straightening surface; 130, heating element; 140, detection block; 141, detection part; 142, connecting part; 143, sensing part; 150, first fixed block; 151, guide rail; 152, displacement sensor; 153, slide groove; 160, second fixed block; 161, spring; 162, floating rod; 170, third fixed block; 171, adjusting screw;

[0044] 200, gripping hand;

[0045] 300, first driving rod; 310, first fixing member;

[0046] 400, a second driving rod; 410, a second fixing member. DETAILED DESCRIPTION

[0047] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0048] Please refer to Figure 1-Figure 6 The present invention discloses a straightening device for a cylindrical workpiece, comprising:

[0049] A clamping drive unit, comprising at least one clamping hand 200 for clamping and driving the workpiece to rotate;

[0050] The detection and straightening unit 100 includes: a slider 110, which can slide along the axial direction of the workpiece, and a straightening surface 120 is provided on the slider 110, and the straightening surface 120 can abut against the side wall of the workpiece; a detection block 140, which can be floated on the slider 110 and abut against the side wall of the workpiece; a heating element 130, which is rotatably connected to the slider 110, and the heating element 130 is rotated to make it move closer to or toward the workpiece.

[0051] In the present application, the workpiece is rotated so that the straightening surface 120 collides or squeezes with the side wall of the workpiece for straightening; at the same time, the detection block 140 is against the side wall of the workpiece to float up and down to detect the runout value. Therefore, as long as the workpiece keeps rotating, the detection and straightening can be carried out synchronously, avoiding the phenomenon of low efficiency and deviation in straightening caused by the asynchrony between straightening and detection.

[0052] In order to avoid springback after straightening, the present application sets a heating element 130. While straightening the position, the heating element 130 is aimed at the position for heating, thereby reducing deformation resistance, improving plastic forming properties, and avoiding springback after straightening.

[0053] Furthermore, the present application provides two clamping hands 200 to clamp the two ends of the workpiece respectively. The clamping hands 200 can move along the axial direction of the workpiece to clamp workpieces of different lengths; the clamping hands 200 can also slide radially to drive the workpiece to move radially.

[0054] Specifically, the clamping hand 200 slides radially during the straightening process, and there are the following two situations:

[0055] First, when straightening a certain position, the workpiece can be driven to move radially by the clamping hand 200. First, the clamping hand 200 drives the workpiece to move a certain distance for straightening. As the straightening progresses, the straightening surface 120 gradually separates from the workpiece. At this time, the clamping hand 200 continues to drive the workpiece to move a certain distance, so that the workpiece is again in contact with the straightening surface 120 for straightening. The clamping hand 200 drives the workpiece to move multiple times until the runout value of the position is within a preset range. The clamping hand 200 moves multiple times to avoid excessive force between the side wall of the workpiece and the straightening surface 120 and damage to the workpiece.

[0056] Second, when straightening a certain position, the clamping hand 200 can also apply force to the workpiece so that the workpiece always keeps in contact with the straightening surface 120. As the workpiece is gradually straightened, the clamping hand 200 continuously drives the workpiece toward the straightening surface 120, so that the same force is always maintained between the workpiece and the straightening surface 120, thereby improving the efficiency and effect of straightening.

[0057] It should be noted that the runout value refers to the curvature of a certain position on the workpiece, and the amplitude of the up and down jump of this position when the workpiece rotates.

[0058] Furthermore, the straightening surface 120 is a 1 / 4 arc surface.

[0059] The straightening surface 120 is a 1 / 4 arc surface, which can increase the contact area between the straightening surface and the workpiece, improve the straightening efficiency, and can also straighten workpieces of different diameters.

[0060] Furthermore, the straightening device includes a first detection and straightening unit 100 and a second detection and straightening unit 100 , and is also provided with a first driving rod 300 and a second driving rod 400 , wherein the first driving rod 300 is fixedly connected to the first detection and straightening unit 100 , and the second driving rod 400 is fixedly connected to the second detection and straightening unit 100 .

[0061] Further, the first driving rod 300 is slidably connected to the second detection and alignment unit 100 , and the second driving rod 400 is slidably connected to the first detection and alignment unit 100 .

[0062] Furthermore, the first detection and straightening unit 100 includes a first slider 110, and the first slider 110 is provided with a first fixed through hole and a first sliding through hole;

[0063] The second detection and straightening unit 100 includes a second slider 110, and the second slider 110 is provided with a second fixing through hole and a second sliding through hole;

[0064] A first fixing member 310 is fixedly disposed on the first driving rod 300. The first fixing member 310 is fixedly connected to the first fixing through hole. The first driving rod 300 can be slidably penetrated into the second sliding through hole.

[0065] The second driving rod 400 is fixedly provided with a second fixing member 410 . The second fixing member 410 is fixedly connected to the second fixing through hole. The second driving rod 400 is slidably disposed in the first sliding through hole.

[0066] Specifically, multiple driving rods are provided, each driving rod is fixedly connected to a slider 110 and is also provided through other sliders 110. When the driving rod moves, it drives the slider 110 fixed thereto to slide along the axial direction of the workpiece, while other sliders 110 are not driven by the driving rod. That is, each slider 110 can be controlled to slide independently, so that each slider 110 can slide to any position of the area to be inspected at the same time for inspection and alignment.

[0067] Furthermore, the detection and straightening unit 100 also includes: a first fixed block 150 arranged on the slider 110, a guide rail 151 is provided on the first fixed block 150, and a displacement sensor 152 is provided on the guide rail 151; the detection block 140 slides along the guide rail 151 and abuts against or separates from the displacement sensor 152.

[0068] The detection block 140 is in contact with the side wall of the workpiece. As the workpiece rotates, the detection block 140 floats up and down. Then the displacement sensor 152 receives the amplitude of the up and down floating of the detection block 140 and obtains the jumping value of the detection position.

[0069] Furthermore, a floating rod 162 is fixedly connected to the detection block 140, and a spring 161 is provided on the floating rod 162;

[0070] A second fixing block 160 is disposed on the first fixing block 150, one end of the floating rod 162 passes through the second fixing block 160 and is slidably connected to the second fixing block 160, one end of the spring 161 abuts against the floating rod 162, and the other end abuts against the second fixing block 160;

[0071] A third fixing block 170 is further disposed on the first fixing block 150 . An adjusting screw 171 is threadedly connected to the third fixing block 170 . The adjusting screw 171 can abut against or separate from a side of the detection block 140 away from the floating rod 162 .

[0072] Specifically, the detection block 140 is arranged in a "]" shape, including a detection part 141, a connecting part 142 and a sensing part 143. The two ends of the connecting part 142 are respectively connected to the detection part 141 and the sensing part 143. The detection part 141 abuts against the side wall of the workpiece. As the workpiece rotates, the detection part 141 drives the sensing part 143 to float up and down. The displacement sensor 152 detects the amplitude of the up and down floating of the sensing part 143 to obtain the jump value of the corresponding position of the workpiece.

[0073] A floating rod 162 is provided on the sensing portion 143, and a spring 161 is provided on the floating rod 162. The elastic force of the spring 161 causes the detection block 140 to tend to move upward, thereby allowing the detection block 140 to float up and down during the rotation of the workpiece, so that the detection portion 141 maintains contact with the side wall of the workpiece to measure the runout value.

[0074] The adjusting screw 171 is arranged to abut against the sensor portion 143 , so as to limit the detection block 140 from excessively moving under the elastic force of the spring 161 and escaping from the guide rail 151 , thereby playing a limiting role.

[0075] Furthermore, the first fixing block 150 is slidably connected to the sliding block 110 .

[0076] Specifically, a slide groove 153 is provided on the first fixed block 150, a bolt is passed through any position of the slide groove 153, and the bolt is connected to the slider 110 to adjust the height of the first fixed block 150, and then adjust the initial height of the detection part 141 to adapt to workpieces of different diameters.

[0077] Furthermore, a straightening method for a cylindrical workpiece is disclosed, which is applied to the straightening method for a cylindrical workpiece, and comprises the steps of:

[0078] S1. Real-time detection and recording of the runout value of the workpiece at each position in its axial direction;

[0079] S2, obtaining the first position with the largest current jitter value, and aligning the first position;

[0080] S3, obtaining the second position with the largest current jitter value, and aligning the second position;

[0081] S4. Repeat step S3 until the runout value at any position of the workpiece is less than a preset value.

[0082] Specifically, in step S1 and step S2, first, the clamping hand 200 clamps the workpiece and drives the workpiece to rotate; then the slider 110 slides along the axial direction of the workpiece to detect the runout values ​​of all positions on the axial direction of the workpiece; then, by comparison, the first position with the maximum runout value is selected, and the slider 110 slides to the first position, and the heating element 130 heats the first position. During the rotation of the workpiece, the first position abuts against the straightening surface 120, and the straightening surface 120 straightens the first position. During the straightening process, since the workpiece is rotating all the time, the detection block 140 can detect the first position in real time. When it is detected that the runout value of the position meets the requirements, the runout value of the position can be completed.

[0083] In step S3, the straightening at the first position is completed, the slider 110 continues to slide along the axial direction of the workpiece, the second position where the current workpiece runout value is the largest is detected, and the slider 110 is moved to the second position for straightening. Real-time detection is still maintained during the straightening process until the runout value at the second position meets the requirements.

[0084] Finally, repeat the detection to obtain the position with the largest runout value on the current workpiece, and repeat the straightening. When the runout values ​​of all positions are detected to meet the requirements, the straightening can be ended.

[0085] In the present application, the position acquisition of multiple maximum runout values ​​is not based on the first detection; after the last straightening is completed, the slider 110 will slide along the axial direction of the workpiece and re-detect the runout values ​​of all positions on the workpiece to avoid changes in the runout values ​​of other positions during the straightening process at a certain position, thereby affecting the accuracy of the straightening result.

[0086] Furthermore, the workpiece is evenly divided into a plurality of areas to be inspected along its axial direction, and further comprises the steps of:

[0087] A1. Real-time acquisition and recording of the runout value of each position of each area to be inspected; wherein a detection and straightening unit 100 is respectively provided in each area to be inspected, and each of the sliders 110 slides in the corresponding area to be inspected;

[0088] A2, obtaining the first position with the largest current jitter value in each area to be inspected, and simultaneously aligning the first positions of multiple areas to be inspected;

[0089] A3, obtaining the second position with the largest current jitter value in each area to be inspected, and aligning the second positions of multiple areas to be inspected at the same time;

[0090] A4. Repeat step A3 until the jitter value at any position of each area to be inspected is less than a preset value.

[0091] Specifically, the present application divides the workpiece into a plurality of inspection areas along its axial direction, and sets a detection and straightening unit 100 for each inspection area to obtain the position with the largest runout value in each inspection area, and straightens each position with the largest runout value at the same time, until the runout values ​​of all positions in each inspection area are less than the preset value, the straightening of all positions on the workpiece can be completed, which greatly shortens the time required for straightening and improves the straightening efficiency.

[0092] Furthermore, in steps S2-S4 and A2-A4, both include: obtaining the jitter value of the current position in real time, and determining whether the jitter value of the current position is less than a preset value, if so, proceeding to the next step or ending, if not, continuing to straighten until the jitter value is less than the preset value and then proceeding to the next step or ending.

[0093] Specifically, during the straightening process, once the runout value of the position is detected to be smaller than the preset value, the straightening of the position can be stopped. On the premise of ensuring that the runout value meets the requirements, the straightening time can be reduced to the shortest possible, thereby improving the straightening efficiency.

[0094] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0095] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0096] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A straightening device for a cylindrical workpiece, characterized in that: include: A clamping drive unit, comprising at least one clamping hand for clamping and driving the workpiece to rotate, wherein the clamping hand can move axially and slide radially along the workpiece; The detection and straightening unit comprises: a slider, which can slide along the axial direction of the workpiece and is provided with a straightening surface, which can abut against the side wall of the workpiece; a detection block, which can be floated on the slider and abut against the side wall of the workpiece; a heating element, which is rotatably connected to the slider, and the heating element is rotated to move closer to or toward the workpiece; The detection block comprises: a detection part, a connecting part and a sensing part. The two ends of the connecting part are respectively connected to the detection part and the sensing part. The detection part is arranged at one end of the straightening surface and can abut against the side wall of the workpiece.

2. A cylindrical workpiece straightening device according to claim 1, characterized in that: The straightening surface is a 1 / 4 arc surface.

3. A cylindrical workpiece straightening device according to claim 1, characterized in that: The straightening device includes a first detection and straightening unit and a second detection and straightening unit, and is further provided with a first driving rod and a second driving rod, wherein the first driving rod is fixedly connected to the first detection and straightening unit, and the second driving rod is fixedly connected to the second detection and straightening unit.

4. A cylindrical workpiece straightening device according to claim 3, characterized in that: The first driving rod is slidably connected to the second detection and alignment unit, and the second driving rod is slidably connected to the first detection and alignment unit.

5. A cylindrical workpiece straightening device according to claim 4, characterized in that: The first detection and straightening unit comprises a first sliding block, and the first sliding block is provided with a first fixing through hole and a first sliding through hole; The second detection and straightening unit comprises a second slider, and the second slider is provided with a second fixed through hole and a second sliding through hole; A first fixing piece is fixedly disposed on the first driving rod, the first fixing piece is fixedly connected to the first fixing through hole, and the first driving rod is slidably disposed in the second sliding through hole; The second driving rod is fixedly provided with a second fixing piece, the second fixing piece is fixedly connected to the second fixing through hole, and the second driving rod is slidably arranged in the first sliding through hole.

6. A cylindrical workpiece straightening device according to claim 1, characterized in that: The detection and straightening unit further comprises: a first fixed block arranged on the sliding block, a guide rail being arranged on the first fixed block, and a displacement sensor being arranged on the guide rail; the detection block slides along the guide rail and abuts against or separates from the displacement sensor.

7. A cylindrical workpiece straightening device according to claim 6, characterized in that: The detection block is fixedly connected with a floating rod, and the floating rod is provided with a spring; A second fixing block is provided on the first fixing block, one end of the floating rod passes through the second fixing block and is slidably connected to the second fixing block, one end of the spring abuts against the floating rod, and the other end abuts against the second fixing block; A third fixing block is also provided on the first fixing block, and an adjusting screw is threadedly connected to the third fixing block. The adjusting screw can abut against or separate from a side of the detection block away from the floating rod.

8. A method for straightening a cylindrical workpiece, applied to a straightening device for a cylindrical workpiece as claimed in any one of claims 1 to 7, characterized in that: Includes steps: S1. Real-time detection and recording of the runout value of the workpiece at each position in its axial direction; S2, obtaining the first position with the largest current jitter value, and aligning the first position; S3, obtaining the second position with the largest current jitter value, and aligning the second position; S4. Repeat step S3 until the runout value at any position of the workpiece is less than a preset value.

9. A method for straightening a cylindrical workpiece according to claim 8, characterized in that: The workpiece is evenly divided into a plurality of inspection areas along its axial direction, and further comprises the steps of: A1. Real-time acquisition and recording of the runout value of each position of each area to be inspected; wherein a detection and straightening unit is respectively provided in each area to be inspected, and each of the sliders slides in the corresponding area to be inspected; A2, obtaining the first position with the largest current jitter value in each area to be inspected, and simultaneously aligning the first positions of multiple areas to be inspected; A3, obtaining the second position with the largest current jitter value in each area to be inspected, and aligning the second positions of multiple areas to be inspected at the same time; A4. Repeat step A3 until the jitter value at any position of each area to be inspected is less than a preset value.

10. A method for straightening a cylindrical workpiece according to claim 9, characterized in that: In steps S2-S4 and A2-A4, both include: obtaining the jitter value of the current position in real time, and determining whether the jitter value of the current position is less than a preset value, if so, proceeding to the next step or ending, if not, continuing to straighten until the jitter value is less than the preset value and then proceeding to the next step or ending.

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