Variable double-side clamping and roundness correcting integrated device for annular parts

Abstract

A variable double-side clamping and roundness correcting integrated device for annular parts comprises a base, a displacement table capable of vertically rotating is installed on the base, a center column capable of horizontally rotating is installed on the displacement table, and a cross-shaped main frame capable of synchronously rotating is connected to the center column. The clamping and roundness correcting device has the advantages that the problems that in the prior art, in the manufacturing and remanufacturing process of annular parts, large-size annular parts are low in clamping and roundness correcting precision, small in application range, complex in operation and the like can be solved. The clamp is simple in structure, low in limitation of the clamping range and high in clamping centrality, can adapt to parts with different diameters, ring widths and ring thicknesses when annular parts are machined, can guarantee accurate coincidence of the circle centers of the parts and the center of the clamp in the clamping process, can achieve multi-angle displacement, and can effectively meet the machining requirements of manufacturing and remanufacturing. And meanwhile, the device has the advantages of convenience in roundness correction operation of the large-size annular part, high roundness correction efficiency, high precision, low operation difficulty and high efficiency.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing and remanufacturing of key components of large-diameter shield machines, and particularly relates to a ring-shaped component variable bilateral clamping and roundness correction integrated device. Background Technique

[0002] As a special large-scale tunnel boring construction machinery, a shield machine plays an important role in the construction of infrastructure such as modern urban rail transit, underground utility tunnels, and water diversion tunnels. The main bearing is one of the key components of the shield machine, and the machining accuracy of ring-shaped parts such as its outer ring directly affects the performance and service life of the shield machine. However, in the manufacturing and remanufacturing processes of ring-shaped parts such as the outer ring of the main bearing of shield machines with a diameter of 14m and above, there is a lack of ideal special fixtures and roundness correction devices. In addition to the difficulty in ensuring part dimensions, the processing production efficiency is also relatively low.

[0003] The manufacturing and remanufacturing difficulties of ring-shaped components represented by the outer ring of the main bearing of large-diameter shield machines include the following aspects: high processing difficulty: the outer ring of the main bearing of a shield machine usually has a complex structure. Especially for large shield machines, the diameter of the bearing outer ring can reach several meters, and the structure and positions to be processed are becoming increasingly complex, requiring stable clamping from multiple angles and variable positions to meet the processing requirements. It is difficult to ensure machining accuracy: traditional fixtures use multiple split clamping devices, and it is difficult to ensure the coaxiality between the part and the ring-shaped component after clamping, making it difficult to achieve high-precision positioning and fixation, easily resulting in machining errors and affecting the final quality of the ring-shaped parts. The need for a larger adaptation range increases: the engineering application of shield machines implements the strategy of "one tunnel, one machine", and with the increase in the service life of shield machines, the manufacturing and remanufacturing requirements for key components such as the outer ring of large-diameter main bearings are growing day by day.

[0004] However, the existing fixed-size integrated fixtures have a limited clamping range restricted by the main frame of the fixture, making it difficult to meet the clamping needs of the increasing size of ring-shaped components. Currently, the roundness correction of large-size ring-shaped components is complex. The single-side roundness correction method has low efficiency and poor accuracy. It is urgent to reduce the operation difficulty, improve the efficiency, and improve the roundness correction accuracy to meet the manufacturing and remanufacturing requirements of ring-shaped components. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ring-shaped component variable bilateral clamping and roundness correction integrated device. The stable clamping of the ring-shaped component can be realized through the clamping columns on the inner and outer clamping arms, which can reduce the processing difficulty, improve the processing accuracy, and can adapt to ring-shaped components of a larger range of diameter types, solving the problems in the prior art.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: An annular part variable bilateral clamping and roundness correction integrated device, which includes a base. A position-changing table capable of vertical rotation is installed on the base, and a central column capable of horizontal rotation is installed on the position-changing table. A cross main frame capable of synchronous rotation is connected to the central column. Two groups of outer clamping arms capable of synchronous rotation are installed at both ends in the length direction of one rod of the cross main frame, and two groups of inner clamping arms capable of synchronous rotation are installed at both ends in the length direction of the other rod of the cross main frame. One end of the outer clamping arm and the inner clamping arm is hinged to the cross main frame, and clamping columns are installed at the other ends of the outer clamping arm and the inner clamping arm. The clamping columns on the outer clamping arm and the clamping columns on the inner clamping arm are arranged corresponding to each other. The clamping columns on the four groups of outer clamping arms can move synchronously outwards or inwards to realize the positioning and clamping of the outer circumference of the annular part. The clamping columns on the four groups of inner clamping arms can move synchronously outwards or inwards to realize the positioning and clamping of the inner circumference of the annular part. When the clamping columns on the outer clamping arm and the clamping columns on the inner clamping arm at the corresponding positions move relatively, the annular part can be roundness corrected. Clamping column driving motors are installed on two of the outer clamping arms, and clamping column driving motors are installed on two of the inner clamping arms. The output shaft of the clamping column driving motor is connected to the rotating shaft of the clamping column. For the clamping columns on the outer clamping arm and the clamping columns on the inner clamping arm arranged corresponding to each other, only one clamping column is installed with a clamping column driving motor. When the clamping column driving motor starts, it can drive the annular part to rotate on the cross main frame. A plurality of annular grooves are opened on the outer circumference of the clamping column, and limiting teeth capable of protruding outwards are installed in each annular groove through springs. When the clamping columns on the outer clamping arm and the clamping columns on the inner clamping arm clamp the annular part, the limiting teeth can be made to completely enter the annular grooves by overcoming the elastic force of the springs. A pressure sensor is also installed on the outer circumference of the clamping column below the lowest annular groove. A first double-axis motor and a second double-axis motor are installed at the central position of the cross main frame. The output shafts at both ends of the first double-axis motor are respectively installed with a first lead screw and a third lead screw, and the output shafts at both ends of the second double-axis motor are respectively installed with a second lead screw and a fourth lead screw. A first slider is fitted on the first lead screw, a second slider is fitted on the second lead screw, a third slider is fitted on the third lead screw, and a fourth slider is fitted on the fourth lead screw. Sliding grooves matching with the first slider, the second slider, the third slider, and the fourth slider are opened on two rods arranged perpendicularly in the cross main frame. The first slider and the third slider are hinged to the inner clamping arm through rib plates, and the second slider and the fourth slider are hinged to the outer clamping arm through rib plates. A quadrilateral mechanism is formed between the rib plates and the clamping arms. When the first double-axis motor starts, it can drive the clamping columns on the inner clamping arm to move synchronously outwards or inwards, and when the second double-axis motor starts, it can drive the clamping columns on the outer clamping arm to move synchronously outwards or inwards. A position-changing slider is installed on the position-changing table, a position-changing sliding groove matching with the position-changing slider is opened on the base, a large semi-circular gear is installed on the position-changing slider, a motor chamber is provided on the base, a position-changing driving motor is installed in the motor chamber, and a small gear meshing with the large semi-circular gear is installed on the output shaft of the position-changing driving motor. When the position-changing driving motor starts, it can drive the position-changing slider to move in the position-changing sliding groove.A key shaft is installed between the large semi-circular gear and the modified slider. Key grooves matching the key shaft are provided on the large semi-circular gear and the modified slider. A limiting convex block is provided at one end of the key shaft, and a detachable limiting pin is installed at the other end of the key shaft. The diameter of the limiting convex block is larger than that of the key groove. The limiting convex block is located on one side of the large semi-circular gear, and the limiting pin is located on one side of the modified slider. A rotatable pawl is also hingedly installed on the base near the modified sliding groove. A tension spring is provided between the pawl and the base. The tension spring always has a tendency to make the pawl rotate into the large semi-circular gear to lock. An axial thrust bearing is installed between the central column and the modified table. A main drive motor is provided inside the modified table. A dial is provided on the output shaft of the main drive motor. A card slot matching the dial is provided on the central column. When the main drive motor starts, it can drive the central column to rotate horizontally relative to the modified table. The central column is connected to the cross main frame through a bolt group.

[0007] The positive effects of the present utility model are as follows: For an annular component variable bilateral clamping and roundness correction integrated device described in the present utility model, a cross main frame capable of position adjustment is installed on the base. An outer clamping arm and an inner clamping arm are installed on the cross main frame. The clamping columns on the outer clamping arm and the inner clamping arm can move synchronously outward or inward to achieve stable clamping and roundness correction of annular components with different diameters. It can solve the problems in the prior art such as low clamping and roundness correction accuracy, small adaptation range, and complex operation for large-sized ring-shaped components during the manufacturing and remanufacturing processes. The limitation of the clamping range is low and the clamping centrality is high. When processing annular components, it can adapt to parts with different diameters, ring widths, and ring thicknesses. During the clamping process, it can ensure the precise coincidence of the center of the part and the center of the fixture, and can achieve multi-angle variation, effectively meeting the manufacturing and remanufacturing processing requirements. At the same time, it has the advantages of convenient roundness correction operation, high roundness correction efficiency, high precision, low operation difficulty, and high efficiency for large-sized annular components. Description of the Drawings

[0008] Figure 1 is a structural schematic diagram of the present utility model;

[0009] Figure 2 is a bottom view of the structure of the cross main frame in the present utility model;

[0010] Figure 3 is a cross-sectional view of the clamping column on the outer clamping arm and the clamping column on the inner clamping arm at the corresponding position in the present utility model;

[0011] Figure 4 is a structural schematic diagram of the present utility model after removing the cross main frame;

[0012] Figure 5 is an exploded view of the structure of the present utility model after removing the cross main frame;

[0013] Figure 6It is a schematic structural diagram of the connection between a large semi-circular gear and a modified slider through a key shaft;

[0014] Figure 7 It is a cross-sectional view between the central column and the modified table;

[0015] Figure 8 It is a working flow chart of the clamping-rounding process of the present utility model;

[0016] Figure 9 It is an example diagram of the maximum working range of the clamping-rounding of the present utility model.

[0017] Reference numerals: 1. Cross main frame, 2. Ring-shaped part, 3. Clamping column, 4. Ring groove, 41. Limiting tooth, 42. Spring, 43. Pressure sensor, 5. Outer clamping arm, 6. Clamping column driving motor, 7. Inner clamping arm, 8. Rib plate, 9. Base, 10. Modified table, 11. Modified slider, 12. First lead screw, 13. First slider, 14. Second double-shaft motor, 15. First double-shaft motor, 16. Second slider, 17. Second lead screw, 18. Third slider, 19. Third lead screw, 20. Fourth slider, 21. Fourth lead screw, 22. Central column, 23. Bolt group, 24. Key shaft, 25. Large semi-circular gear, 26. Modified driving motor, 27. Motor housing, 28. Small gear, 29. Tension spring, 30. Pawl, 31. Main driving motor, 32. Axial thrust bearing, 33. Limit pin, 34. Modified sliding groove, 35. Limiting convex block, 36. Dial plate, 37. Card slot. Detailed implementation manner

[0018] A variable-type double-sided clamping and rounding integrated device for ring-shaped parts according to the present utility model, as shown in Figure 1 and Figure 2 shown, includes a base 9, on which a modified table 10 capable of rotating vertically is installed, on the modified table 10 a central column 22 capable of rotating horizontally is installed, and on the central column 22 a cross main frame 1 capable of rotating synchronously is connected, wherein the cross main frame 1 is used for placing ring-shaped parts, and the position of the ring-shaped parts can be adjusted by adjusting the positions of the modified table 10 and the central column 22, so as to adapt to subsequent part processing. The rotation actions of the modified table 10 and the central column 22 can be driven and realized by existing mechanisms such as slewing bearings and rotating motors.

[0019] To achieve the positioning and placement of annular components of different diameter types on the cross main frame 1, two groups of outer clamping arms 5 capable of synchronous rotation are installed at both ends of one rod of the cross main frame 1 in the length direction, and two groups of inner clamping arms 7 capable of synchronous rotation are installed at both ends of the other rod of the cross main frame 1 in the length direction. One end of the outer clamping arm 5 and the inner clamping arm 7 is hinged to the cross main frame 1, and clamping columns 3 are installed at the other ends of the outer clamping arm 5 and the inner clamping arm 7. The clamping columns 3 on the outer clamping arm 5 and the clamping columns 3 on the inner clamping arm 7 are arranged corresponding to each other for clamping the peripheral wall of the annular component.

[0020] The clamping columns 3 on the four groups of outer clamping arms 5 can move synchronously outward or inward to achieve the positioning and clamping of the outer periphery of the annular part 2, and the clamping columns 3 on the four groups of inner clamping arms 7 can move synchronously outward or inward to achieve the positioning and clamping of the inner periphery of the annular part 2.

[0021] When the clamping columns 3 on the outer clamping arm 5 and the clamping columns 3 on the inner clamping arm 7 at the corresponding positions move relatively, the annular part 2 can be roundness corrected.

[0022] To achieve the rotational drive of the clamping column 3 for the annular component, clamping column drive motors 6 can be installed on two of the outer clamping arms 5, and clamping column drive motors 6 are installed on two of the inner clamping arms 7. The output shaft of the clamping column drive motor 6 is connected to the rotating shaft of the clamping column 3. For the clamping columns 3 on the outer clamping arm 5 and the clamping columns 3 on the inner clamping arm 7 arranged corresponding to each other, only one clamping column 3 is installed with a clamping column drive motor 6. When the clamping column drive motor 6 starts, it can drive the annular part 2 to rotate on the cross main frame 1.

[0023] The clamping column 3 installed with the clamping column drive motor 6 is the active clamping column, and the clamping column 3 without the clamping column drive motor 6 installed is the driven clamping column. For the clamping columns 3 on the outer clamping arm 5 and the inner clamping arm 7 arranged corresponding to each other, as long as one of them is the active clamping column. [[ID=I3]]

[0024] Furthermore, to achieve the positioning and clamping of workpieces of different ring width types, as Figure 3 shown, a plurality of ring grooves 4 can be opened on the outer periphery of the clamping column 3, and limiting teeth 41 capable of protruding outward are installed in each ring groove 4 through springs 42. When the clamping columns 3 on the outer clamping arm 5 and the clamping columns on the inner clamping arm 7 clamp the annular part 2, the limiting teeth 41 can be made to completely enter the ring grooves 4 against the elastic force of the springs 42. The limiting teeth 41 located at the upper side position of the annular part 2 form effective limits, which can prevent the annular part 2 from moving vertically during the clamping process. And the plurality of ring grooves 4 arranged along the height direction of the clamping column 3 have limiting teeth 41 at multiple different height positions, which can adapt to workpieces of different ring width types. After the workpiece is clamped, the limiting teeth 41 protruding outside the ring grooves 4 can provide vertical limits for the annular part 2.

[0025] A pressure sensor 43 is also installed on the outer periphery of the clamping column 3 below the lowermost annular groove 4. The pressure sensor 43 can feedback the clamping force between the clamping column 3 and the workpiece. When the values displayed by the pressure sensors 43 on all the clamping columns 3 are the same, it indicates that the clamping positioning and roundness correction are successful.

[0026] Further, in order to realize the synchronous movement of the four outer clamping arms 5 or the four inner clamping arms 7 on the cross main frame 1, and let the clamping columns 3 expand or contract synchronously to realize the clamping and fixing of the outer peripheral wall or the inner peripheral wall of the annular part, a first double-shaft motor 15 and a second double-shaft motor 14 can be installed at the central position of the cross main frame 1. The output shafts at both ends of the first double-shaft motor 15 are respectively installed with a first lead screw 12 and a third lead screw 19, and the output shafts at both ends of the second double-shaft motor 14 are respectively installed with a second lead screw 17 and a fourth lead screw 21.

[0027] A first slider 13 is fitted on the first lead screw 12, a second slider 16 is fitted on the second lead screw 17, a third slider 18 is fitted on the third lead screw 19, and a fourth slider 20 is fitted on the fourth lead screw 21. Two rods arranged perpendicular to each other in the cross main frame 1 are provided with chutes that cooperate with the first slider 13, the second slider 16, the third slider 18, and the fourth slider 20. The first slider 13 and the third slider 18 are hinged to the inner clamping arm 7 through a rib plate 8, and the second slider 16 and the fourth slider 20 are hinged to the outer clamping arm 5 through a rib plate 8.

[0028] A quadrilateral mechanism is formed between the rib plate 8 and the clamping arm. When the first double-shaft motor 15 is started, it can drive the clamping columns 3 on the inner clamping arm 7 to expand or contract synchronously. When the second double-shaft motor 14 is started, it can drive the clamping columns 3 on the outer clamping arm 5 to expand or contract synchronously.

[0029] There are a total of four sets of the above-mentioned lead screw-slider mechanisms as the driving mechanism. Each mechanism includes a set of lead screw and a slider. Four sets of chutes are provided in the cross main frame 1. One end of each set of lead screw is fixed to the end of the fixture through a bearing. The lead screw passes through the center of the slider, and the slider can slide in the chute. The double-shaft motor power source drives two sets of lead screw-slider mechanisms. By precisely controlling the motor to drive the lead screw to rotate, the slider is driven to move radially. The slider is connected to a pair of clamping arms through a rib plate. By the radial movement of the slider, the clamping column moves inward or outward. The outward movement of the inner clamping arm realizes the coaxial positioning of the ring-shaped part and the fixture, and the inward movement of the outer clamping arm realizes the stable clamping of the inner and outer clamping columns together.

[0030] Further, in order to realize the vertical rotation adjustment of the turntable 10 relative to the base 9, as Figures 4 - 6 shown, a turntable slider 11 can be installed on the turntable 10, and a turntable chute 34 that cooperates with the turntable slider 11 is provided on the base 9. When the turntable slider 11 moves in the turntable chute 34, the position of the turntable 10 relative to the base 9 can be adjusted.

[0031] To realize the movement drive of the displacement slider 11, a large semi-circular gear 25 is installed on the displacement slider 11, and the large semi-circular gear 25 can rotate together with the displacement slider 11. A motor chamber 27 is provided on the base 9, and a displacement drive motor 26 is installed in the motor chamber 27. A small gear 28 meshing with the large semi-circular gear 25 is installed on the output shaft of the displacement drive motor 26. When the displacement drive motor 26 starts, it can drive the displacement slider 11 to move in the displacement chute 34.

[0032] To realize the fixed connection between the displacement slider 11 and the large semi-circular gear 25, a key shaft 24 can be installed between the large semi-circular gear 25 and the displacement slider 11, and key grooves matching with the key shaft 24 are provided on the large semi-circular gear 25 and the displacement slider 11. A limit lug 35 is provided at one end of the key shaft 24, and a detachable limit pin 33 is installed at the other end of the key shaft 24. The diameter of the limit lug 35 is larger than the diameter of the key groove. The limit lug 35 is located on one side of the large semi-circular gear 25, and the limit pin 33 is located on one side of the displacement slider 11. The key shaft 24 is positioned and installed between the displacement slider 11 and the large semi-circular gear 25 through the limit lug 35 and the limit pin 33, and the displacement slider 11 and the large semi-circular gear 25 are connected into an integral body that can rotate synchronously through the key shaft 24.

[0033] To limit the displacement slider 11 after the position is adjusted, a rotatable pawl 30 is also hinged and installed on the base 9 near the displacement chute 34. A tension spring 29 is provided between the pawl 30 and the base 9, and the tension spring 29 always has a tendency to make the pawl 30 rotate into the large semi-circular gear 25 for locking. When it is necessary to adjust the position of the displacement slider 11, the staff can overcome the elastic force of the tension spring 29 to rotate the pawl 30 out of the tooth position of the large semi-circular gear 25. After losing the limit, the large semi-circular gear 25 can be rotated and adjusted driven by the displacement drive motor 26. After the adjustment is in place, the pawl 30 rotates back into the teeth to realize the rotational locking of the displacement slider 11.

[0034] Furthermore, to realize the installation of the central column 22 on the displacement table 10 and the position adjustment of the central column 22 relative to the displacement table 10, as Figure 7 shown, an axial thrust bearing 32 can be installed between the central column 22 and the displacement table 10. A main drive motor 31 is provided in the displacement table 10. A dial 36 is provided on the output shaft of the main drive motor 31. A card slot 37 matching with the dial 36 is provided on the central column 22. When the main drive motor 31 starts, it can drive the central column 22 to rotate horizontally relative to the displacement table 10. The central column 22 is connected to the cross main frame 1 through a bolt group 23, which is convenient for fixing and disassembling, and at the same time can ensure that the annular parts on the cross main frame 1 can adjust their own positions through the central column 22 and the displacement table 10.

[0035] An integrated device for variable bilateral clamping and circularity correction of annular parts according to the present utility model can realize the circumferential rotation of the annular parts themselves, meet the requirements of different processing angles on the bearing plane of the main frame, and realize the horizontal, vertical and variable-angle applications of the working module.

[0036] When using the integrated device for variable bilateral clamping and circularity correction of annular parts according to the present utility model to clamp and correct the circularity of annular parts, the operation steps are as follows:

[0037] The first step: Initial positioning

[0038] The crane places the annular part 2 on the bearing surface of the cross main frame 1. At this time, the center of the circular ring and the center of the cross main frame 1 are likely not to coincide, which will directly affect the subsequent processing accuracy.

[0039] The second step: Inner wall clamping and coincidence of the center of the circle

[0040] Start the first double-shaft motor 15 to drive the first lead screw 12 and the third lead screw 19 to rotate, so that the first slider 13 and the third slider 18 move away from the center of the cross main frame 1 synchronously;

[0041] The first slider 13 and the third slider 18 move away from the center of the fixture synchronously, and drive the four inner clamping arms 7 to clamp outward synchronously through the rib plate 8;

[0042] The clamping columns 3 on the four inner clamping arms 7 move synchronously, and their movement center always coincides with the center of the cross main frame 1;

[0043] The clamping columns 3 on the four inner clamping arms 7 simultaneously press against the inner wall of the annular part 2, and the limiting teeth 41 contract into the ring groove 4 when the spring 42 contracts, and the non-contracted limiting teeth 41 limit the axial movement of the annular part 2;

[0044] When the clamping force of the clamping column 3 measured by the pressure sensor 43 reaches the preset value, close the first double-shaft motor 15 and start the second double-shaft motor 14, so that the center of the annular part 2 coincides with the center of the cross main frame 1.

[0045] The third step: Outer wall clamping and internal and external clamping

[0046] Start the second double-shaft motor 14 to drive the second lead screw 17 and the fourth lead screw 21 to rotate, so that the second slider 16 and the fourth slider 20 move towards the center of the cross main frame 1 synchronously;

[0047] The second slider 16 and the fourth slider 20 move towards the center of the cross main frame 1 synchronously, and drive the four outer clamping arms 5 to clamp inward synchronously through the rib plate 8;

[0048] The clamping columns 3 on the four outer clamping arms 5 move synchronously, and their center coincides with the center of the cross main frame 1;

[0049] The clamping posts 3 on the four outer clamping arms 5 simultaneously press against the outer peripheral wall of the annular part 2. When the clamping force reaches the preset value, the second double-shaft motor 14 is controlled to turn off, achieving the common and stable clamping of the inner clamping arm 7 and the outer clamping arm 5.

[0050] Fourth step: Circumferential rotation

[0051] Start the main drive motor 31, drive the central column 22 to rotate according to the processing requirements. The central column 22 drives the cross main frame 1 to rotate, achieving the circumferential rotation of the ring-shaped parts;

[0052] After the cross main frame 1 rotates to the target angle or number of turns, turn off the main drive motor 31.

[0053] Fifth step: Horizontal displacement

[0054] Lift the pawls 30 and the tension springs 29 on both sides of the large semi-circular gear 25 to release the locking of the displacement table 10;

[0055] Start the displacement drive motor 26 fixed to the motor housing 27, and drive the displacement gear set composed of the small gear 28 and the large semi-circular gear 25 to rotate;

[0056] The large semi-circular gear 25 drives the displacement table 10 and the displacement slider 11 to rotate in the displacement chute 34 through the key shaft 24. By changing the rotation direction and rotation angle, horizontal, vertical and variable-angle clamping can be achieved to meet the needs of the additive remanufacturing stage;

[0057] When the annular part 2 rotates to the ideal angle, lower the pawls 30 on both sides of the large semi-circular gear 25, and turn off the displacement drive motor 26 to achieve the stable positioning of the displacement table 10.

[0058] Sixth step: Double-sided roundness correction

[0059] Start the clamping post drive motor 6 on the inner and outer clamping arms, drive the four main drive clamping posts to rotate. The frictional force generated between the clamping posts 3 and the side wall of the annular part forms the driving force F_drive, and the two main drive clamping posts of the inner clamping arm and the two main drive clamping posts of the outer clamping arm rotate in opposite directions;

[0060] A total of four main drive clamping posts on the inner and outer sides play a driving role, and the four driven clamping posts play an auxiliary supporting role. The driving force F_drive drives the annular part to rotate around the cross main frame 1;

[0061] When the annular part rotates to the position where the clamping post 3 reaches the severely deformed part of the annular part and stops, start the first double-shaft motor 15 and the second double-shaft motor 14, so that the clamping post 3 applies a pressure perpendicular to the ring wall on both sides of the annular part to perform multi-point roundness correction;

[0062] When the pressure sensors 43 on the four inner clamping columns 3 show the same force value, it indicates that the inner roundness correction is successful. When the pressure sensors 43 on the four outer clamping columns 3 show the same force value, it indicates that the outer roundness correction is successful.

[0063] As Figure 9 shown, it is assumed that the distance from the top of the arm of the cross main frame 1 to the center of the cross main frame 1 can be 10 m, the length of the clamping arm is 10 m, and the radius of the largest applicable ring-shaped parts of the device is about 14.1 m, which is about 1.41 times the size from the top of the arm of the cross main frame 1 to the center of the cross main frame 1.

[0064] The present utility model provides a ring-shaped part variant double-sided clamping and roundness correction integrated device, the structure of which includes main components such as a cross main frame 1, a rib plate 8, an inner clamping arm group, an outer clamping arm group, clamping columns 3, a lead screw-slider mechanism, a motor, a slewing table 10, a slewing gear group, a pawl 30, a base 9, etc. The lead screw-slider mechanism is driven by a double-shaft motor to realize the outward expansion or inward movement of the clamping columns. The outer peripheral surface of the clamping columns adopts a layered structure of a limit tooth 41, a spring 42 and an annular groove 4, which can adapt to clamping with variable ring widths within a certain range. During initial positioning, the ring-shaped part 2 is placed on the bearing surface of the main frame. At this time, the center of the ring is probably not coincident with the center of the main frame. Then, the inner wall clamping and centering are carried out. The first double-shaft motor is started to drive the rotation of the first and third lead screws, so that the first and third sliders move away from the center of the main frame, and drive the four inner clamping arms to clamp outward synchronously through the rib plate. The four clamping columns move synchronously and their centers always coincide with the center of the fixture, and finally the center of the ring coincides with the center of the fixture. Subsequently, the outer wall clamping is carried out. The second double-shaft motor is started to drive the rotation of the second and fourth lead screws, so that the second and fourth sliders move towards the center of the fixture, and drive the four outer clamping arms to clamp inward synchronously through the rib plate. The four clamping columns move synchronously and their centers coincide with the center of the fixture, and finally the stable clamping on both the inner and outer sides is realized. During the stable clamping stage, the clamping module can be driven by the main drive motor to rotate along the circumferential direction of the ring, and the slewing slider and the slewing table are driven by the slewing gear to realize the horizontal, vertical and variable-angle conversion of the ring, so as to better cooperate with remanufacturing processes such as laser additive manufacturing. Finally, after the additive manufacturing on both the inner and outer sides, the roundness correction is carried out simultaneously. The clamping column drive motor on the clamping arm is started, and the inner and outer main drive clamping columns rotate in the opposite direction to drive the ring-shaped parts to rotate around the central axis of the main frame. When the clamping columns reach the obvious deformation part of the ring, they stop, and the inner and outer clamping arms drive the clamping columns to apply pressure to carry out roundness correction on the ring-shaped parts.

[0065] The utility model has the capabilities of changing the ring diameter, ring thickness, and ring width within a certain range for horizontal, vertical, and variable-angle bilateral clamping and circularity correction. During the working process, it can well maintain the coincidence of the center of the circle and the center of the fixture. By adjusting the horizontal, vertical, and variable-angle operations, it can better adapt to the remanufacturing process. The maximum clamping range is 1.41 times that of the main frame of the fixture. Multi-point simultaneous clamping and circularity correction on both the inner and outer sides can effectively improve the clamping and circularity correction accuracy and efficiency, and large molds are not required. The utility model is of great significance for improving the processing accuracy and production efficiency of annular parts 2 such as the outer ring of the main bearing of large-diameter shield machines, and can better meet the needs of modern infrastructure construction.

[0066] The technical solution of the utility model is not limited to the scope of the embodiments described in the present utility model. The technical content not described in detail in the present utility model is well-known technology.

Claims

1. A ring-shaped component variant double-sided clamping and roundness correction integrated device, characterized in that: It includes a base (9), on which a turntable (10) capable of vertical rotation is installed. On the turntable (10), a central column (22) capable of horizontal rotation is installed. A cross main frame (1) capable of synchronous rotation is connected to the central column (22). At both ends of one rod of the cross main frame (1) in the length direction, two groups of outer clamping arms (5) capable of synchronous rotation are installed. At both ends of the other rod of the cross main frame (1) in the length direction, two groups of inner clamping arms (7) capable of synchronous rotation are installed. One end of the outer clamping arm (5) and the inner clamping arm (7) is hinged to the cross main frame (1). At the other end of the outer clamping arm (5) and the inner clamping arm (7), a clamping column (3) is installed. The clamping columns (3) on the outer clamping arm (5) are arranged corresponding to the clamping columns (3) on the inner clamping arm (7). The clamping columns (3) on the four groups of outer clamping arms (5) can move synchronously outwards or inwards to realize the positioning and clamping of the outer circumference of the annular part (2). The clamping columns (3) on the four groups of inner clamping arms (7) can move synchronously outwards or inwards to realize the positioning and clamping of the inner circumference of the annular part (2). When the clamping columns (3) on the outer clamping arm (5) and the inner clamping arm (7) at the corresponding positions move relatively, the annular part (2) can be roundness corrected.

2. The one-piece device for variably clamping both sides and circularity correction of an annular component according to claim 1, wherein: Clamping column driving motors (6) are installed on two of the outer clamping arms (5), and clamping column driving motors (6) are installed on two of the inner clamping arms (7). The output shaft of the clamping column driving motor (6) is connected to the rotating shaft of the clamping column (3). For the clamping columns (3) on the outer clamping arm (5) and the inner clamping arm (7) arranged corresponding to each other, only one clamping column (3) is installed with a clamping column driving motor (6). When the clamping column driving motor (6) starts, it can drive the annular part (2) to rotate on the cross main frame (1).

3. The integrated device for variant bilateral clamping and circularity calibration of an annular component according to claim 1, characterized in that: A number of annular grooves (4) are formed on the outer circumference of the clamping column (3). In each annular groove (4), a limiting tooth (41) capable of protruding outwards is installed through a spring (42). When the clamping columns (3) on the outer clamping arm (5) and the inner clamping arm (7) clamp the annular part (2), the limiting tooth (41) can be made to completely enter the annular groove (4) against the elastic force of the spring (42). A pressure sensor (43) is also installed on the outer circumference of the clamping column (3) below the lowermost annular groove (4).

4. An integrated device for variant bilateral clamping and roundness correction of an annular part according to claim 1, characterized in that: At the central position of the cross main frame (1), a first double-shaft motor (15) and a second double-shaft motor (14) are installed. Output shafts at both ends of the first double-shaft motor (15) are respectively installed with a first lead screw (12) and a third lead screw (19). Output shafts at both ends of the second double-shaft motor (14) are respectively installed with a second lead screw (17) and a fourth lead screw (21). A first slider (13) is fitted on the first lead screw (12), a second slider (16) is fitted on the second lead screw (17), a third slider (18) is fitted on the third lead screw (19), and a fourth slider (20) is fitted on the fourth lead screw (21). On two perpendicular rods in the cross main frame (1), there are sliding grooves that cooperate with the first slider (13), the second slider (16), the third slider (18), and the fourth slider (20). The first slider (13) and the third slider (18) are hingedly connected to the inner clamping arm (7) through a rib plate (8). The second slider (16) and the fourth slider (20) are hingedly connected to the outer clamping arm (5) through a rib plate (8). A quadrilateral mechanism is formed between the rib plate (8) and the clamping arm. When the first double-shaft motor (15) is started, it can drive the clamping column (3) on the inner clamping arm (7) to move outward or inward synchronously. When the second double-shaft motor (14) is started, it can drive the clamping column (3) on the outer clamping arm (5) to move outward or inward synchronously.

5. An integrated device for variant bilateral clamping and circularity correction of an annular component according to claim 1, characterized in that: A displacement slider (11) is installed on the displacement table (10). A displacement sliding groove (34) that cooperates with the displacement slider (11) is provided on the base (9). A large semi-circular gear (25) is installed on the displacement slider (11). A motor chamber (27) is provided on the base (9). A displacement driving motor (26) is installed in the motor chamber (27). A small gear (28) that meshes with the large semi-circular gear (25) is installed on the output shaft of the displacement driving motor (26). When the displacement driving motor (26) is started, it can drive the displacement slider (11) to move in the displacement sliding groove (34).

6. An integrated device for variant bilateral clamping and roundness correction of an annular component according to claim 5, characterized in that: A key shaft (24) is installed between the large semi-circular gear (25) and the displacement slider (11). Key grooves that cooperate with the key shaft (24) are provided on the large semi-circular gear (25) and the displacement slider (11). A limiting convex block (35) is provided at one end of the key shaft (24). A detachable limiting pin (33) is installed at the other end of the key shaft (24). The diameter of the limiting convex block (35) is larger than the diameter of the key groove. The limiting convex block (35) is located on one side of the large semi-circular gear (25), and the limiting pin (33) is located on one side of the displacement slider (11). A rotatable pawl (30) is also hingedly installed on the base (9) near the position of the displacement sliding groove (34). A tension spring (29) is provided between the pawl (30) and the base (9). The tension spring (29) always has a tendency to make the pawl (30) rotate into the large semi-circular gear (25) for locking.

7. An integrated device for variant bilateral clamping and roundness correction of an annular component according to claim 1, characterized in that: An axial thrust bearing (32) is installed between the central column (22) and the slewing table (10). A main drive motor (31) is provided inside the slewing table (10). A dial plate (36) is provided on the output shaft of the main drive motor (31). A clamping groove (37) matching the dial plate (36) is formed on the central column (22). When the main drive motor (31) starts, it can drive the central column (22) to rotate horizontally relative to the slewing table (10). The central column (22) is connected to the cross main frame (1) through a bolt group (23).

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