Clamping and positioning system and clamping method for arc thin-wall part

Abstract

The clamping and positioning system comprises a clamping device, the clamping device comprises a lifting ring, a visual detection device is arranged at the bottom of the lifting ring, a sliding assembly is arranged at the bottom of the lifting ring, a first clamping piece is hinged to the sliding assembly, and a second clamping piece is rotationally hinged to one side of the first clamping piece; a first driving part is arranged on one side of the second clamping piece; a hanging column is arranged at the center of the hanging ring, a sliding sleeve is slidably sleeved on the hanging column, a hanging cable is arranged on the outer side surface of the sliding sleeve, and one end of the hanging cable is connected with one end of the first clamping piece; a second driving part is arranged between the davit and the sliding sleeve; pressure sensors are arranged at the clamping ends of the first clamping piece and the second clamping piece; according to the clamping device, the inner side wall and the outer side wall of the arc thin-wall part can be clamped at the same time, the clamping pressure is adjusted in real time, the stability of the part in the lifting process is guaranteed while the clamping force is reduced, and meanwhile compatible clamping can be conducted on the arc thin-wall parts of different sizes and specifications.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of a clamping hoist for a circular-arc thin-wall part, and particularly relates to a clamping and positioning system and a clamping method for a circular-arc thin-wall part. BACKGROUND

[0002] The prior art for hoisting and clamping a circular-arc thin-wall part generally includes the following two ways: The first way is to clamp and fix the inner side wall of the circular-arc thin-wall part by internal bracing. In order to ensure the stability of the circular-arc thin-wall part during hoisting, a large internal bracing force needs to be applied to the inner side wall of the circular-arc thin-wall part to ensure that the clamping surface of the clamp has sufficient friction with the inner side wall of the circular-arc thin-wall part.

[0003] The second way is to clamp and fix the outer side wall of the circular-arc thin-wall part by external pressing, that is, to clamp the outer side wall of the circular-arc thin-wall part directly by a clamp. A large clamping force also needs to be applied to the outer side wall of the circular-arc thin-wall part to ensure the stability of the part during hoisting.

[0004] Since the circular-arc thin-wall part is braced or pressed in one direction in the prior art, if the force of the clamp is too large, the contact surface of the circular-arc thin-wall part will be damaged and deformed. In use occasions with high precision requirements, if the inner side wall or the outer side wall of the circular-arc thin-wall part is damaged and deformed, the current part will be scrapped.

[0005] Moreover, the existing internal bracing clamp or external pressing clamp can only clamp a single specification of circular-arc thin-wall part and is difficult to compatibly clamp circular-arc thin-wall parts of different sizes.

[0006] Therefore, in view of the above problems of the clamp for clamping a circular-arc thin-wall part in the prior art, the application discloses a clamping and positioning system and a clamping method for a circular-arc thin-wall part. SUMMARY

[0007] The application discloses a clamping and positioning system and a clamping method for a circular-arc thin-wall part, which can clamp the inner side wall and the outer side wall of the circular-arc thin-wall part at the same time, adjust the clamping pressure in real time, thereby reducing the clamping force while ensuring the stability of the part during hoisting, and compatibly clamping circular-arc thin-wall parts of different sizes.

[0008] The application is achieved by the following technical scheme: A clamping and positioning system for a thin-walled arc-shaped component includes a clamping device. The clamping device includes a lifting ring, a visual inspection device at its bottom, and at least three radial supports evenly distributed circumferentially along the bottom of the lifting ring. A sliding assembly is slidably mounted on each radial support, and a first clamping member is hinged to each sliding assembly. A second clamping member is rotatably hinged to one side of the first clamping member, and a first driving part is provided on one side of the second clamping member. The first driving part is used to drive the second clamping member to rotate relative to the first clamping member and control the rotation angle of the second clamping member. A lifting column is located at the center of the lifting ring, and a sliding sleeve is slidably mounted on the lifting column. A lifting cable is provided on the outer surface of the sliding sleeve, and one end of the lifting cable is connected to one end of the first clamping member. A second driving part is provided between the lifting column and the sliding sleeve, and the second driving part is used to drive the sliding sleeve to slide along the lifting column and control the sliding stroke of the sliding sleeve. Pressure sensors are provided at the clamping ends of both the first and second clamping members, and the pressure sensors are respectively connected to the first and second driving parts.

[0009] To better realize the present invention, the visual inspection device further includes at least one centering detection unit and at least one outer contour detection unit. The centering detection unit is used to detect the concentricity between the lifting ring and the arc-shaped thin-walled part, and the outer contour detection unit is used to detect the outer side wall dimension and inner side wall dimension of the arc-shaped thin-walled part. The visual inspection device is connected to the sliding assembly.

[0010] To better realize the present invention, the first driving part further includes a first motor and a first reduction gear set, the second clamping member is hinged to the first clamping member through a rotating shaft, and one end of the rotating shaft is connected to the output shaft of the first motor through the first reduction gear set.

[0011] To better realize the present invention, the second driving part further includes a second motor, a second driving gear, and a second rack. The second rack is disposed on the outside of the hanging column, the second motor is fixedly installed on the outside of the sliding sleeve, and the second driving gear is sleeved on the output shaft of the second motor. The second driving gear is meshed with the second rack.

[0012] To better realize the present invention, the sliding component further includes a sliding plate with aligned intervals, the sliding plate having radial grooves; a slider is slidably disposed between the radial grooves on the two sliding plates, a linear self-locking device is disposed on one side of the slider, the linear self-locking device being able to drive the slider to slide and lock the position of the slider; the slider is provided with a hinge ear, a rotating shaft is disposed between the two ends of the first clamping member, the rotating shaft being hinged to a hole on the hinge ear.

[0013] To better realize the present invention, the linear self-locking device further includes a linear screw and a nut sleeve. The linear screw is rotatably disposed between the two ends of the slide plate. The slide block is provided with a mounting hole, and the nut sleeve is disposed in the mounting hole. The nut sleeve is threadedly fitted onto the outside of the linear screw.

[0014] To better realize the present invention, the first clamping member further includes an L-shaped clamp, the first end of the L-shaped clamp is connected to the lifting cable, the second end of the L-shaped clamp is provided with a hook, and the two ends of the L-shaped clamp are hinged together by a threaded locking pin to provide a second clamping member.

[0015] To better realize the present invention, the second clamping member further includes a connecting arm, the first end of which is hinged to an L-shaped clamp, and the second end of which is provided with a contact block.

[0016] A clamping method for a thin-walled arc-shaped component, based on the above-mentioned clamping and positioning system, includes the following steps: Step 1: Use a visual inspection device to check the concentricity of the lifting ring and the arc-shaped thin-walled part, and pre-lift the lifting ring to a position where the concentricity with the arc-shaped thin-walled part meets the standard; use a visual inspection device to check the outline dimensions of the arc-shaped thin-walled part. Step 2: Calculate the appropriate clamping area based on the outline dimensions of the arc-shaped thin-walled part, and drive the first clamping member to slide radially into the appropriate clamping area through the sliding assembly; Step 3: Drive the sliding sleeve to rise through the second drive unit, so as to pull the first clamping member to rotate through the suspension cable, so that the clamping end of the first clamping member is in pre-contact with the outer wall of the arc-shaped thin-walled part, and monitor the first pressure on the outer wall. Step 4: Slowly move the sliding sleeve using the second drive unit until the first pressure changes to a suitable pressure range, then fix the position of the sliding sleeve. Step 5: Drive the second clamping part to rotate relative to the first clamping part through the first driving part, so that the clamping end of the second clamping part is in pre-contact with the inner wall of the arc-shaped thin-walled part, and monitor the second pressure on the inner wall. Step 6: Drive the second clamping part to rotate slowly through the second driving part until the second pressure changes to a suitable pressure range, then fix the angle of the second clamping part. Step 7: Connect the hook at the top of the lifting column to the external lifting equipment to lift the arc-shaped thin-walled part.

[0017] To better realize the present invention, further, when the first clamping member is in pre-contact with the outer side wall, the first pressure on the outer side wall is greater than or equal to one-quarter of the allowable pressure of the outer side wall; when the second clamping member is in pre-contact with the inner side wall, the second pressure on the inner side wall is greater than or equal to one-quarter of the allowable pressure of the inner side wall.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) During the lifting process of the sliding sleeve, the first clamping member is rotated relative to the sliding assembly by the lifting cable, thereby causing the clamping end of the first clamping member to press the outer wall of the arc thin-walled part; at the same time, by rotating the second clamping member, the second clamping member presses the inner wall of the arc thin-walled part, thereby realizing the synchronous clamping of the inner and outer walls of the arc thin-walled part. Under the premise of reducing the clamping force, the stability of the part during the lifting process can still be guaranteed. Since the clamping force is reduced, the damage and deformation of the arc thin-walled part caused by excessive clamping force can be effectively avoided. (2) The present invention drives the sliding component to slide radially through the linear self-locking device, which is equivalent to adjusting the installation radius of the first clamping component and the second clamping component, so that the first clamping component and the second clamping component can be compatible with the clamping of arc thin-walled parts of different sizes and specifications, thereby improving the practicality of the entire clamping and positioning device. (3) The present invention detects the pressure on the inner and outer walls of the arc thin-walled component in real time, so as to adjust the rotation angle of the second clamping component driven by the first driving part and adjust the stroke of the sliding sleeve driven by the second driving part, thereby controlling the pressure on the inner and outer walls, ensuring that the inner and outer walls of the arc thin-walled component are subjected to appropriate pressure, that is, ensuring that the arc thin-walled component can be hoisted stably, while also avoiding the situation where the arc thin-walled component is damaged or deformed due to excessive pressure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the clamping device. Figure 2 This is a schematic diagram of the sliding component. Figure 3 This is a schematic diagram of the linear self-locking device; Figure 4 This is a schematic diagram of the structure of the first clamping member and the second clamping member; Figure 5 This is a top view of the clamping device; Figure 6 This is a schematic diagram of the installation of the first clamping member and the second clamping member.

[0020] Wherein: 1-lifting ring; 2-radial support; 3-sliding assembly; 4-first clamping member; 5-second clamping member; 6-lifting column; 7-sliding sleeve; 8-lifting cable; 9-lifting hook; 31-sliding plate; 32-radial groove; 33-slider; 34-linear self-locking device; 311-waist-shaped hole; 341-linear screw; 342-nut sleeve; 41-L-shaped clamp; 42-hook; 51-connecting arm; 52-contact block; 71-limiting flange; 72-lifting cable connecting disc; 100-first drive unit; 200-second drive unit; 101-first motor; 102-first reduction gear set; 201-second motor; 202-second drive gear; 203-second rack. Detailed Implementation

[0021] Example 1: This embodiment provides a clamping and positioning system for a thin-walled arc-shaped component, such as... Figure 1 and Figure 2 As shown, the device includes a clamping device, which includes a lifting ring 1. A visual inspection device is provided at the bottom of the lifting ring 1. At least three sets of radial supports 2 are evenly distributed circumferentially at the bottom of the lifting ring 1. A sliding assembly 3 is slidably mounted on the radial supports 2. A first clamping member 4 is hinged to the sliding assembly 3. A second clamping member 5 is rotatably hinged to one side of the first clamping member 4. A first driving part 100 is provided on one side of the second clamping member 5. The first driving part 100 is used to drive the second clamping member 5 to rotate relative to the first clamping member 4 and control the rotation of the second clamping member 5. The rotation angle; a hanging column 6 is provided at the center of the lifting ring 1, a sliding sleeve 7 is slidably fitted on the hanging column 6, a hanging cable 8 is provided on the outer side of the sliding sleeve 7, one end of the hanging cable 8 is connected to one end of the first clamping member 4; a second driving part 200 is provided between the hanging column 6 and the sliding sleeve 7, the second driving part 200 is used to drive the sliding sleeve 7 to slide along the hanging column 6 and control the sliding stroke of the sliding sleeve 7; pressure sensors are provided at the clamping ends of the first clamping member 4 and the second clamping member 5, and the pressure sensors are respectively connected to the first driving part 100 and the second driving part 200.

[0022] A sliding sleeve 7 is slidably fitted on the outside of the lifting column 6 along the axial direction. A limit block is provided on the outer bottom of the lifting column 6, and a limit hook is provided on the bottom of the sliding sleeve 7. The limit hook is correspondingly set with the bottom of the limit block, so that after the sliding sleeve 7 slides upward to the limit position, the limit hook engages with the bottom of the limit block, limiting the stroke of the sliding sleeve 7 and preventing the sliding sleeve 7 from falling off the lifting column 6.

[0023] The top of the lifting column 6 is connected to external lifting equipment via a hook 9. When the second drive unit 200 drives the sliding sleeve 7 to slide upward outside the lifting column 6, it in turn drives the first clamping member 4 to rotate relative to the sliding assembly 3 via the lifting cable 8, which is similar to a lever structure. By moving the sliding assembly 3 along the radial support 2, the installation radius of the first clamping member 4 can be adjusted, thus accommodating the clamping of thin-walled arc parts of different specifications.

[0024] The first clamping member 4, with its clamping end near the outer surface of the arc-shaped thin-walled component, abuts against the component. Then, the second clamping member 5 is rotated so that its clamping end abuts against the inner surface of the component. The engagement of the first and second clamping members 4 and 5 then positions and clamps the arc-shaped thin-walled component. After locking the positions of the first and second clamping members 4 and 5, the component can be securely lifted using external hoisting equipment.

[0025] A clamping method for a thin-walled arc-shaped component includes the following steps: Step 1: Use a visual inspection device to check the concentricity of the lifting ring 1 and the arc-shaped thin-walled part, and pre-lift the lifting ring 1 to the position where the concentricity with the arc-shaped thin-walled part meets the standard; use a visual inspection device to check the outline dimensions of the arc-shaped thin-walled part. Step 2: Calculate the appropriate clamping area based on the outline dimensions of the arc-shaped thin-walled part, and drive the first clamping member 4 to slide radially into the appropriate clamping area through the sliding component 3; Step 3: The second drive unit 200 drives the sliding sleeve 7 to rise, so as to pull the first clamping member 4 to rotate through the suspension cable 8, so that the clamping end of the first clamping member 4 makes pre-contact with the outer wall of the arc-shaped thin-walled part, and monitors the first pressure on the outer wall. Step 4: Slowly move the sliding sleeve 7 using the second drive unit 200 until the first pressure changes to a suitable pressure range, then fix the position of the sliding sleeve 7. Step 5: Drive the second clamping part 5 to rotate relative to the first clamping part 4 through the first driving part 100, so that the clamping end of the second clamping part 5 is in pre-contact with the inner wall of the arc-shaped thin-walled part, and monitor the second pressure on the inner wall. Step 6: Drive the second clamping part 5 to rotate slowly through the second driving part 100 until the second pressure changes to a suitable pressure range, then fix the angle of the second clamping part 5. Step 7: Connect the hook at the top of the lifting column 6 to the external lifting equipment to lift the arc-shaped thin-walled part.

[0026] Furthermore, when the first clamping member 4 is in pre-contact with the outer wall, the first pressure on the outer wall is greater than or equal to one-quarter of the allowable pressure of the outer wall; when the second clamping member 5 is in pre-contact with the inner wall, the second pressure on the inner wall is greater than or equal to one-quarter of the allowable pressure of the inner wall.

[0027] Example 2: This embodiment discloses a clamping and positioning system for a thin-walled arc component, which is an improvement on embodiment 1. The visual inspection device includes at least one centering detection unit and at least one outer contour detection unit. The centering detection unit is used to detect the concentricity between the lifting ring 1 and the thin-walled arc component, and the outer contour detection unit is used to detect the outer side wall dimension and inner side wall dimension of the thin-walled arc component. The visual inspection device is connected to the sliding assembly 3.

[0028] The centering detection unit includes an infrared coaxiality sensor, and the outer contour detection unit includes a CCD camera. The infrared coaxiality sensor can accurately detect the concentricity between the lifting ring 1 and the arc-shaped thin-walled part in real time. A concentricity within 5mm is considered to indicate that the lifting ring 1 and the arc-shaped thin-walled part are concentric. After the concentricity is achieved, the contour image of the arc-shaped thin-walled part is acquired by a CCD camera. The contour image includes the inner wall image and the outer wall image. The acquired contour image is sent to an external computer. The image processing algorithm in the external computer can fit the inner wall contour gear and the outer wall contour dimensions of the arc-shaped thin-walled part. Then, the sliding component 3 is controlled by the inner wall contour gear and the outer wall contour dimensions to drive the first clamping member 4 and the second clamping member 5 to move radially to the area suitable for clamping the arc-shaped thin-walled part. This ensures that the distance between the clamping end of the first clamping member 4 and the outer wall is appropriate, and that the distance between the clamping end of the second clamping member 5 and the inner wall is appropriate. This avoids the situation where the distance is too large, which would prevent the clamping end from making smooth contact with the arc-shaped thin-walled part, or the situation where the distance is too small, which would result in excessive initial clamping force.

[0029] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0030] Example 3: This embodiment discloses a clamping and positioning system for a thin-walled arc-shaped component, which is an improvement on embodiment 1 or 2, such as... Figure 3 , Figure 6 As shown, the first drive unit 100 includes a first motor 101 and a first reduction gear set 102. The second clamping member 5 is hinged to the first clamping member 4 through a rotating shaft. One end of the rotating shaft is connected to the output shaft of the first motor 101 through the first reduction gear set 102.

[0031] The first motor 101 drives the shaft of the second clamping member 5 to rotate through the first reduction gear set 102, thereby causing the second clamping member 5 to rotate relative to the first clamping member 4, so as to realize that the clamping end of the second clamping member 5 contacts or separates from the inner surface of the arc-shaped thin-walled part.

[0032] like Figure 4As shown, the second drive unit 200 includes a second motor 201, a second drive gear 202, and a second rack 203. The second rack 203 is disposed on the outer side of the hanging column 6, and the second motor 201 is fixedly mounted on the outer side of the sliding sleeve 7. The second drive gear 202 is sleeved on the output shaft of the second motor 201, and the second drive gear 202 is meshed with the second rack 203. The second motor 201 drives the second drive gear 202 to rotate, and then, through the meshing structure between the second drive gear 202 and the second rack 203, drives the sliding sleeve 7 to move up and down along the hanging column 6.

[0033] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0034] Example 4: This embodiment discloses a clamping and positioning system for a thin-walled arc-shaped component, which is an improvement on any one of embodiments 1-3, such as... Figure 2 and Figure 5 As shown, the sliding component 3 includes a sliding plate 31 with aligned intervals, and a radial groove 32 is provided on the sliding plate 31; a slider 33 is slidably disposed between the radial grooves 32 on the two sliding plates 31; a linear self-locking device 34 is provided on one side of the slider 33, and the linear self-locking device 34 can drive the slider 33 to slide and lock the position of the slider 33; a hinge ear is provided on the slider 33, and a rotating shaft is provided between the two ends of the first clamping member 4, and the rotating shaft is hinged to the hole on the hinge ear.

[0035] The slider 33 has square prisms on both sides and slides into the radial groove 32, allowing it to slide along the groove while preventing rotation. A linear self-locking device 34 drives the slider 33 to slide along the radial groove 32, which in turn drives the first clamping member 4 to slide along the groove, adjusting its installation radius to accommodate different sizes of thin-walled arc-shaped parts. Simultaneously, after the slider 33 reaches its position, the linear self-locking device 34 locks its position, preventing further sliding.

[0036] Furthermore, such as Figure 2 and Figure 5 As shown, the linear self-locking device 34 includes a linear screw 341 and a nut sleeve 342. The linear screw 341 is rotatably disposed between the two ends of the slide plate 31. The slider 33 is provided with a mounting hole, and the nut sleeve 342 is disposed in the mounting hole. The nut sleeve 342 is threadedly fitted onto the outside of the linear screw 341.

[0037] The slide plate 31 has bearing seats at both ends, and a linear screw 341 is rotatably mounted between the bearing seats. A handwheel is located at one end of the linear screw 341, allowing it to rotate. A mounting hole is provided through the slide block 33, into which a nut sleeve 342 is inserted. A connecting flange with several connecting holes is located on the end face of the nut sleeve 342. Several threaded holes are located on the end face of the mounting hole. Screws are inserted into the connecting holes and threaded holes to secure the nut sleeve 342 in the mounting hole. The nut sleeve 342 has threaded holes that engage with the linear screw 341. Rotation of the linear screw 341 causes the slide block 33 to slide along the radial groove 32. When the linear screw 341 stops rotating, a self-locking structure between the threads locks the position of the slide block 33.

[0038] Furthermore, the top of the slide plate 31 is provided with a waist-shaped hole 311, and the top of the slider 33 is provided with a safety lock hole. A safety pin is inserted between the waist-shaped hole 311 and the safety lock hole, and a safety nut is threaded onto one end of the mounting pin. After the slider 33 slides into place, the safety pin can be inserted into the waist-shaped hole 311 and the safety lock hole, and the safety nut can be screwed onto the threaded section of the safety pin. By tightening the safety nut, the slider 33 is safely locked.

[0039] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0040] Example 5: This embodiment discloses a clamping and positioning system for a thin-walled arc-shaped component, which is an improvement on any one of embodiments 1-4, such as... Figure 3 As shown, the first clamping member 4 includes an L-shaped clamp 41, the first end of which is connected to the lifting cable 8, and the second end of which is provided with a hook 42. A second clamping member 5 is hinged between the two ends of the L-shaped clamp 41 via a threaded locking pin. The second clamping member 5 includes a connecting arm 51, the first end of which is hinged to the L-shaped clamp 41, and the second end of which is provided with a contact block 52.

[0041] The first end of the L-shaped clamp 41 is connected to the lifting cable 8, and the second end of the L-shaped clamp 41 is the contact part. A rotating shaft is provided between the first and second ends of the L-shaped clamp 41, and the rotating shaft is rotatably hinged to the hinge hole on the slider 33. When the first end of the L-shaped clamp 41 is pulled by the lifting cable 8, the L-shaped clamp 41 rotates around the rotating shaft, thereby driving its second end to approach the outer surface of the arc-shaped thin-walled component until the contact part presses against the outer surface of the arc-shaped thin-walled component, while the hook 42 presses against the bottom surface of the arc-shaped thin-walled component. Two aligned lugs are also provided between the first and second ends of the L-shaped clamp 41, and hinge holes are coaxially provided on the two lugs. The first end of the connecting arm 51 is provided with a rotating shaft, and the two ends of the rotating shaft are rotatably hinged to the hinge holes on both sides respectively. The second end of the connecting arm 51 is provided with a contact block 52. Once the L-shaped clamp 41 presses against the outer side of the arc-shaped thin-walled component, the connecting arm 51 can be rotated to move closer to the inner side of the arc-shaped thin-walled component until the contact block 52 at the bottom of the connecting arm 51 presses against the inner side of the arc-shaped thin-walled component, thereby achieving the clamping and fixing of the arc-shaped thin-walled component.

[0042] The rest of this embodiment is the same as any one of embodiments 1-4, so it will not be described again.

[0043] Example 6: This embodiment discloses a clamping and positioning system for a thin-walled arc-shaped component, which is an improvement on any one of embodiments 1-5, such as... Figure 2 As shown, the sliding sleeve 7 is provided with a limiting flange 71 on the outside, and a cable connecting plate 72 is sleeved on the top of the limiting flange 71. A connecting ear is provided on the outer side of the cable connecting plate 72, and the connecting ear is connected to one end of the cable 8.

[0044] The limiting flange 71 has several connecting holes arranged circumferentially, and the cable connecting plate 72 has several through holes arranged circumferentially. By inserting bolts into the through holes and connecting holes and locking them with nuts, the cable connecting plate 72 is positioned and installed outside the sliding sleeve 7, allowing the cable connecting plate 72 to move with the sliding sleeve 7. When the cable connecting plate 72 slides upward, the first clamping member 4 can be rotated by the cable 8 to abut against the outer side of the arc-shaped thin-walled part.

[0045] The rest of this embodiment is the same as any one of embodiments 1-5, so it will not be described again.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A clamping and positioning system for a thin-walled arc-shaped component, comprising a clamping device, characterized in that, The clamping device includes a lifting ring (1), a visual inspection device is provided at the bottom of the lifting ring (1), and at least three sets of radial supports (2) are evenly distributed around the bottom of the lifting ring (1). A sliding component (3) is slidably provided on the radial support (2), and a first clamping member (4) is hinged on the sliding component (3). A second clamping member (5) is rotatably hinged to one side of the first clamping member (4). A first driving part (100) is provided on one side of the second clamping member (5). The first driving part (100) is used to drive the second clamping member (5) to rotate relative to the first clamping member (4) and control the rotation angle of the second clamping member (5). A hanging column (6) is provided at the center of the ring (1). A sliding sleeve (7) is slidably fitted on the hanging column (6). A hanging cable (8) is provided on the outer side of the sliding sleeve (7). One end of the hanging cable (8) is connected to one end of the first clamping member (4). A second driving part (200) is provided between the hanging column (6) and the sliding sleeve (7). The second driving part (200) is used to drive the sliding sleeve (7) to slide along the hanging column (6) and control the sliding stroke of the sliding sleeve (7). Pressure sensors are provided at the clamping ends of the first clamping member (4) and the second clamping member (5). The pressure sensors are connected to the first driving part (100) and the second driving part (200) respectively.

2. The clamping and positioning system for a thin-walled arc-shaped part according to claim 1, characterized in that, The visual inspection device includes at least one centering detection unit and at least one outer contour detection unit. The centering detection unit is used to detect the concentricity between the lifting ring (1) and the arc-shaped thin-walled part. The outer contour detection unit is used to detect the outer side wall dimension and inner side wall dimension of the arc-shaped thin-walled part. The visual inspection device is connected to the sliding assembly (3).

3. The clamping and positioning system for a thin-walled arc-shaped part according to claim 2, characterized in that, The first drive unit (100) includes a first motor (101) and a first reduction gear set (102). The second clamping member (5) is hinged to the first clamping member (4) through a rotating shaft. One end of the rotating shaft is connected to the output shaft of the first motor (101) through the first reduction gear set (102).

4. The clamping and positioning system for a thin-walled arc-shaped part according to claim 3, characterized in that, The second drive unit (200) includes a second motor (201), a second drive gear (202), and a second rack (203). The second rack (203) is disposed on the outside of the hanging column (6). The second motor (201) is fixedly installed on the outside of the sliding sleeve (7). The second drive gear (202) is sleeved on the output shaft of the second motor (201). The second drive gear (202) meshes with the second rack (203).

5. The clamping and positioning system for a thin-walled arc-shaped part according to claim 4, characterized in that, The sliding component (3) includes a sliding plate (31) with aligned intervals, and a radial groove (32) is provided on the sliding plate (31); a slider (33) is slidably arranged between the radial grooves (32) on the two sliding plates (31), and a linear self-locking device (34) is provided on one side of the slider (33). The linear self-locking device (34) can drive the slider (33) to slide and lock the position of the slider (33); a hinge ear is provided on the slider (33), and a rotating shaft is provided between the two ends of the first clamping member (4). The rotating shaft is hinged to the hole on the hinge ear.

6. The clamping and positioning system for a thin-walled arc-shaped part according to claim 5, characterized in that, The linear self-locking device (34) includes a linear screw (341) and a nut sleeve (342). The linear screw (341) is rotatably disposed between the two ends of the slide plate (31). The slider (33) is provided with a mounting hole, and the nut sleeve (342) is disposed in the mounting hole. The nut sleeve (342) is threadedly fitted onto the outside of the linear screw (341).

7. The clamping and positioning system for a thin-walled arc-shaped part according to claim 6, characterized in that, The first clamping member (4) includes an L-shaped clamp (41), the first end of which is connected to the lifting cable (8), the second end of which is provided with a hook (42), and the two ends of the L-shaped clamp (41) are hinged together by a threaded locking pin to provide a second clamping member (5).

8. The clamping and positioning system for a thin-walled arc-shaped part according to claim 7, characterized in that, The second clamping member (5) includes a connecting arm (51), the first end of which is hinged to an L-shaped clamp (41), and the second end of which is provided with a contact block (52).

9. A clamping method for a thin-walled arc-shaped component, implemented based on the clamping and positioning system described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Use a visual inspection device to check the concentricity of the lifting ring (1) and the arc-shaped thin-walled part, and pre-lift the lifting ring (1) to the position where the concentricity with the arc-shaped thin-walled part meets the standard; use a visual inspection device to check the outline dimensions of the arc-shaped thin-walled part. Step 2: Calculate the appropriate clamping area based on the outline dimensions of the arc-shaped thin-walled part, and drive the first clamping part (4) to slide radially into the appropriate clamping area through the sliding component (3); Step 3: Drive the sliding sleeve (7) to rise through the second drive unit (200) so as to pull the first clamping member (4) to rotate through the suspension cable (8) so that the clamping end of the first clamping member (4) is in pre-contact with the outer wall of the arc-shaped thin-walled part and monitor the first pressure on the outer wall. Step 4: Slowly move the sliding sleeve (7) through the second drive unit (200) until the first pressure changes to a suitable pressure range, then fix the position of the sliding sleeve (7); Step 5: Drive the second clamping part (5) to rotate relative to the first clamping part (4) through the first driving part (100), so that the clamping end of the second clamping part (5) is in pre-contact with the inner wall of the arc-shaped thin-walled part, and monitor the second pressure on the inner wall. Step 6: Drive the second clamping part (5) to rotate slowly through the second driving part (100) until the second pressure changes to a suitable pressure range, and then fix the angle of the second clamping part (5); Step 7: Connect the hook at the top of the lifting column (6) to the external lifting equipment to lift the arc-shaped thin-walled part.

10. The clamping method for a thin-walled arc-shaped component according to claim 9, characterized in that, When the first clamping member (4) is in pre-contact with the outer wall, the first pressure on the outer wall is greater than or equal to one-quarter of the allowable pressure of the outer wall; when the second clamping member (5) is in pre-contact with the inner wall, the second pressure on the inner wall is greater than or equal to one-quarter of the allowable pressure of the inner wall.

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