Round workpiece anti-deformation device

Abstract

The utility model belongs to the technical field of anti-deformation tools, and particularly relates to a round workpiece anti-deformation device which comprises a positioning box, a driving mechanism, transmission mechanisms and an adjusting rod are arranged in the positioning box, the driving mechanism comprises a driving shaft arranged in the positioning box, the driving mechanism is connected with a plurality of transmission mechanisms, and the adjusting rod is connected with the driving shaft. Each transmission mechanism is connected with a plurality of adjusting rods, and each adjusting rod extends out of the side wall of the positioning box and is fixedly connected with a supporting block; the driving mechanism is used for driving the corresponding adjusting rods to stretch out and draw back, the corresponding supporting blocks are close to or away from the positioning box, and the transmission mechanism is used for transmission connection between the set of adjusting rods connected with the transmission mechanism and the driving mechanism. The supporting block is close to or far away from the positioning box through the transmission mechanism, the requirement for supporting inner circles of workpieces with different diameters is met, and the requirement for deformation prevention of the workpieces with different axial lengths is met by adjusting the number of the barrels and the number of the structures in the barrels.

Description

Technical Field

[0001] This utility model belongs to the field of anti-deformation tooling technology, specifically relating to an anti-deformation device for a circular workpiece. Background Technology

[0002] Many workpieces are composed of multiple welded parts. Some of these parts have inner circles that require machining due to their assembly relationship. If the tolerance requirements for the inner circle of a part are high and it is adjacent to a weld, machining must be performed after the welds between the various parts of the workpiece are completed. This is to avoid deformation of the inner circle, which has already been machined in its part state, due to welding, which would affect subsequent assembly and use. However, in many cases, after the various parts of a workpiece are welded, there are problems such as high machining difficulty or sequential processes affecting the manufacturing cycle during the overall machining process. Therefore, it is necessary to machine the parts individually and then assemble them by welding. During the welding process, the impact of welding deformation on the machined dimensions must be controlled. Current anti-deformation devices mostly achieve anti-deformation by setting up corresponding internal support frames to support the inner circle of the workpiece. In practical use, this is not suitable for supporting the inner circles of workpieces with different diameters. Summary of the Invention

[0003] This utility model addresses the problem that existing anti-deformation devices for circular workpieces, which mostly rely on setting up corresponding support frames inside the workpiece for internal support and anti-deformation, cannot meet the support requirements of workpieces of different sizes. It provides a circular workpiece anti-deformation device that uses a transmission mechanism to move the support block closer to or further away from the positioning box, thereby meeting the support requirements of the inner circle of workpieces with different diameters.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A device for preventing deformation of circular workpieces includes a positioning box. The positioning box contains a driving mechanism, a transmission mechanism, and adjusting rods. The driving mechanism includes a driving shaft disposed within the positioning box. The driving mechanism connects to multiple transmission mechanisms, each of which connects to multiple adjusting rods. Each adjusting rod extends out of the side wall of the positioning box and is fixedly connected to a support block. The driving mechanism drives the corresponding adjusting rods to extend or retract, allowing the corresponding support blocks to move closer to or further away from the positioning box. The transmission mechanism provides a transmission connection between its connected set of adjusting rods and the driving mechanism. In use, rotating the driving shaft system drives the corresponding adjusting rods to extend or retract, enabling the support blocks to move and support the inner diameter of workpieces of different sizes to prevent deformation.

[0006] Preferably, each of the transmission mechanisms includes multiple circumferentially arranged and sequentially meshing first bevel gears and a second bevel gear slidably sleeved on the drive shaft, wherein the second bevel gear meshes with one of the first bevel gears; each of the adjusting rods includes a screw and a screw barrel, wherein one end of each screw is fixedly connected to the corresponding first bevel gear, and the other end extends out of the side wall of the positioning box and is threaded into the corresponding screw barrel, wherein the screw barrel extends out of the positioning box and is fixedly connected to a support block, the drive shaft drives multiple second bevel gears to rotate synchronously, drives the first bevel gear meshing with the second bevel gear to rotate, drives the screw to rotate, realizes the extension and retraction of the screw barrel, and drives the support block to move closer to or away from the positioning box.

[0007] Preferably, the drive shaft has a plurality of strip-shaped grooves extending axially in the circumferential direction, and each of the second bevel gears has a through hole extending vertically. A plurality of strip-shaped protrusions matching the strip-shaped grooves are fixedly provided on the inner wall of the through hole. The synchronous rotation and relative sliding connection between the drive shaft and the second bevel gears are realized through the cooperation of the strip-shaped grooves and the strip-shaped protrusions.

[0008] Preferably, the positioning box is further provided with multiple adjustment mechanisms corresponding one-to-one with the transmission mechanism. Each adjustment mechanism includes a first connecting member, a second connecting member, a connecting plate, a connecting rod, and a first handle. The first connecting member is fixedly connected to the corresponding second bevel gear and rotatably connected to the second connecting member, and both are sleeved on the drive shaft. A connecting plate is fixedly connected to one side of the second connecting member. A connecting rod is slidably provided at the end of the connecting plate away from the second connecting member. Multiple adjustment holes are provided on the positioning box. The end of the connecting rod extends out of the adjustment hole and is fixedly connected to the first handle. The adjustment holes include a first strip hole, a second strip hole, and a third strip hole. The first strip hole and the third strip hole are both arranged along the axial direction of the drive shaft, and the lower end of the first strip hole is lower than the third strip hole. The upper ends of the first strip hole and the third strip hole are connected through the second strip hole. By moving the first handle from the lower end corresponding to the first strip hole to the lower end corresponding to the third strip hole, the corresponding second bevel gear is driven to move along the axial direction of the drive shaft, thereby preventing the second bevel gear from meshing with the first bevel gear.

[0009] Preferably, the first connecting member includes a first annular plate fixedly disposed above the corresponding second bevel gear and a first annular protrusion fixedly sleeved on the outer side of the upper end of the first annular plate. The second connecting member includes a second annular plate sleeved on the outer side of the first annular plate and a second annular protrusion fixedly disposed on the inner side of the lower end of the second annular plate. The second annular protrusion is located between the first annular protrusion and the corresponding second bevel gear. Through the cooperation of the first connecting member and the second connecting member, the two can move synchronously in the axial direction and rotate relative to each other.

[0010] Preferably, a limiting plate is provided above each second bevel gear, the limiting plate is fixedly sleeved on the drive shaft, and a spring is provided between the limiting plate and the second connecting member, the spring being sleeved on the drive shaft, and the spring ensuring the meshing of the second bevel gear with the corresponding first bevel gear.

[0011] Preferably, the end of the connecting plate away from the second connecting member has a long groove with a T-shaped cross section. The long groove is arranged parallel to the corresponding second strip hole. The end of the connecting rod is fixedly connected to a T-shaped rod that is slidably arranged in the long groove. The T-shaped rod cooperates with the long groove to ensure that the end of the connecting rod can move between the first strip hole and the third strip hole along the second strip hole.

[0012] Preferably, the positioning box includes two covers and multiple cylinders that are fixedly connected to each other along the axial direction. Each cylinder corresponds to a transmission mechanism, and the appropriate number of cylinders and transmission mechanisms can be selected according to specific needs.

[0013] Preferably, each of the cover bodies has a second handle that is rotatably provided through it, and the two ends of the drive shaft are respectively connected to the corresponding second handles. Rotating the second handles drives the drive shaft to rotate.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] 1. This utility model rotates the drive shaft, which drives the second bevel gear and its corresponding multiple first bevel gears to rotate simultaneously, thereby causing multiple adjusting rods to extend and retract, so that multiple support blocks open and press against the inner circle of the workpiece. This allows it to adapt to the inner support of workpieces with different inner diameters and effectively prevents workpiece deformation.

[0016] 2. By setting up multiple cylinders and corresponding transmission mechanisms, this utility model can select the appropriate number of cylinder lengths according to the axial length of different workpieces or the required internal support length, thus ensuring the internal support requirements for different lengths.

[0017] 3. When facing the need for internal support of workpieces with a relatively long length, this utility model rotates the drive shaft to drive multiple transmission mechanisms to work simultaneously, thereby driving multiple adjusting rods corresponding to the multiple transmission mechanisms to extend and retract, and all support blocks move at the same time, ensuring the consistency of the internal support dimensions of the workpiece and ensuring that the clamping force of multiple support blocks on the inner circle of the workpiece is basically the same.

[0018] 4. As needed, this utility model can adjust the first handle to correspond to the lower end of the corresponding second strip hole, thereby canceling the meshing between the second bevel gear corresponding to the second handle and the corresponding first bevel gear. Thus, when supporting workpieces in different positions or with shorter lengths, it is not necessary to drive many parts to work, reducing the workload. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0020] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0023] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle.

[0024] Figure 6 This utility model Figure 4 Enlarged view of point C in the middle.

[0025] Figure 7 This is a schematic diagram of the structure of the second handle of this utility model.

[0026] Figure 8 This is a schematic diagram of the structure of the second bevel gear of this utility model.

[0027] Figure 9 This is a schematic diagram of the adjustment mechanism of this utility model.

[0028] Figure 10 This is a structural schematic diagram of the multiple screw cylinders and support blocks corresponding to each other at the top and bottom of this utility model.

[0029] The numbers in the attached diagram are as follows: 1 is the drive shaft, 2 is the support block, 3 is the first bevel gear, 4 is the screw, 5 is the screw barrel, 6 is the second bevel gear, 7 is the connecting plate, 8 is the connecting rod, 9 is the first handle, 10 is the first strip hole, 11 is the second strip hole, 12 is the third strip hole, 13 is the first annular plate, 14 is the first strip protrusion, 15 is the second annular plate, 16 is the second annular protrusion, 17 is the strip groove, 18 is the limiting plate, 19 is the spring, 20 is the long groove, 21 is the T-shaped rod, 22 is the cover, 23 is the cylinder, and 24 is the second handle. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0031] like Figures 1-10As shown, this embodiment provides a device for preventing deformation of a circular workpiece, including a positioning box. The positioning box includes two covers 22 and multiple cylindrical bodies 23 that are fixedly connected axially between the two covers 22. The positioning box is equipped with a driving mechanism, a transmission mechanism, and an adjusting rod. Each cylindrical body 23 corresponds to a transmission mechanism, that is, each cylindrical body 23 is provided with a transmission mechanism. The driving mechanism includes a driving shaft 1 disposed in the positioning box. The driving shaft 1 passes through the multiple cylindrical bodies 23. The driving mechanism is connected to multiple transmission mechanisms. Each transmission mechanism is connected to multiple adjusting rods. Each adjusting rod extends out of the side wall of the positioning box and is fixedly connected to a support block 2. The support block 2 is an arc-shaped block. The outer side of the multiple support blocks 2 abuts against the inner circular surface of the workpiece to provide internal support for the workpiece and prevent workpiece deformation.

[0032] The driving mechanism is used to drive the corresponding adjusting rod to extend or retract, so as to move the corresponding support block 2 closer to or further away from the positioning box, so as to support the inner circular surface of workpieces of different sizes and shapes to prevent deformation. The transmission mechanism is used for the transmission connection between the set of adjusting rods connected to it and the driving mechanism.

[0033] Each of the transmission mechanisms includes multiple circumferentially arranged and sequentially meshing first bevel gears 3 and second bevel gears 6 slidably sleeved on the drive shaft 1. Each transmission mechanism includes four first bevel gears 3. The drive shaft 1 has multiple circumferentially opened strip-shaped grooves 17 extending along its axial direction. Each second bevel gear 6 has a through hole extending vertically. Multiple strip-shaped protrusions matching the strip-shaped grooves 17 are fixedly provided on the inner wall of the through holes. The axial sliding connection and circumferential synchronous rotation between the second bevel gear 6 and the drive shaft 1 are realized through the cooperation of the strip-shaped protrusions and the strip-shaped grooves 17. The second bevel gear 6 meshes with one of the first bevel gears 3. When the second bevel gear 6 rotates, it drives all the first bevel gears 3 of the corresponding transmission mechanism to rotate.

[0034] Each of the adjusting rods includes a screw 4 and a screw cylinder 5. One end of each screw 4 is fixedly connected to the corresponding first bevel gear 3, and the other end extends out of the side wall of the positioning box and is threaded into the corresponding screw cylinder 5. The screw cylinder 5 extends out of the positioning box and is fixedly connected to the support block 2. When the first bevel gear 3 rotates, it drives the corresponding screw 4 to rotate, which drives the corresponding screw cylinder 5 to extend and retract, and drives the corresponding support block 2 to move closer to or away from the positioning box.

[0035] The positioning box is also equipped with multiple adjustment mechanisms corresponding to the transmission mechanism. Each adjustment mechanism includes a first connector, a second connector, a connecting plate 7, a connecting rod 8, and a first handle 9. The first connector is fixedly connected to the corresponding second bevel gear 6 and rotatably connected to the second connector, and both are sleeved on the drive shaft 1. The first connector includes a first annular plate 13 fixedly disposed above the corresponding second bevel gear 6 and a first annular protrusion 14 fixedly sleeved on the outer side of the upper end of the first annular plate 13. The second connector includes a second annular plate 15 sleeved on the outer side of the first annular plate 13 and a second annular protrusion 16 fixedly disposed on the inner side of the lower end of the second annular plate 15. The second annular protrusion 16 is located between the first annular protrusion 14 and the corresponding second bevel gear 6. That is, the first connector and the second connector are rotatably connected and both are slidably sleeved along the axial direction of the drive shaft 1.

[0036] A connecting plate 7 is fixedly connected to one side of the second connector. A connecting rod 8 is slidably provided at the end of the connecting plate 7 away from the second connector. Multiple adjustment holes are provided on the positioning box. A first handle 9 is fixedly connected to the end of the connecting rod 8 extending out of the adjustment hole. The first annular plate 13 and the first annular protrusion 14 rotate synchronously with the corresponding second bevel gear 6. The second annular plate 15 and the second annular protrusion 16 are rotated and limited by the corresponding connecting plate 7, the connecting rod 8 and the adjustment hole.

[0037] The adjustment hole includes a first strip hole 10, a second strip hole 11, and a third strip hole 12. The first strip hole 10 and the third strip hole 12 are both arranged along the axial direction of the drive shaft 1, and the lower end of the first strip hole 10 is lower than the third strip hole 12. The upper ends of the first strip hole 10 and the third strip hole 12 are connected through the second strip hole 11. That is, when the connecting rod 8 is driven to move up and down in the first strip hole 10 or the second strip hole 12 by the first handle 9, the connecting plate 7 is driven to move up and down, which in turn drives the corresponding second connecting piece, the first connecting piece, and the second bevel gear 6 to move along the axial direction of the drive shaft 1. As a result, the second bevel gear 6 and the corresponding first bevel gear 3 no longer mesh. Therefore, when the drive shaft 1 rotates, the transmission mechanism corresponding to the first bevel gear 3 does not receive driving power and does not work.

[0038] The connecting plate 7 has a T-shaped long groove 20 at the end away from the second connecting member. The long groove 20 is parallel to the corresponding second strip hole 11. The end of the connecting rod 8 is fixedly connected to a T-shaped rod 21 that is slidably disposed in the long groove. When the end of the connecting rod 8 is moved in the second strip hole 11 by the first handle 9, the T-shaped rod 21 slides in the long groove 20, and the connecting plate 7 does not move. At the same time, the lower end of the first strip hole 10 is lower than the third strip hole 12. That is, when the end of the connecting rod 7 is located at the lower end of the first strip hole 10, the corresponding second bevel gear 6 meshes with the corresponding first bevel gear 3. When the connecting rod 7 is located at the lower end of the third strip hole 12, the corresponding second bevel gear 6 does not contact the corresponding first bevel gear 3.

[0039] Each second bevel gear 6 is provided with a limiting plate 18, which is fixedly sleeved on the drive shaft 1. A spring 19 is provided between the limiting plate 18 and the second connecting member. The spring 19 is sleeved on the drive shaft 1. Through the elastic force of the spring 19, the second connecting member is ensured to move downward under the elastic force of the spring 19. Thus, when the connecting rod 7 is in the first strip hole 10, it is located at its lower end, thereby ensuring the meshing of the second bevel gear 6 and the first bevel gear 3. When the end of the connecting rod 7 is in the third strip hole 12, it is located at its lower end, thereby preventing it from returning to the first strip hole 10 through the second strip hole 11.

[0040] It should be noted that the spring 19 is movably sleeved on the drive shaft 1 and is located between the corresponding limiting plate 18 and the second connecting member.

[0041] like Figure 4 As shown, a second handle 24 is rotatably provided on each of the cover bodies 22. The two ends of the drive shaft 1 are respectively connected to the corresponding second handle 24. The second handle 24 includes a grip part and a connecting part. The connecting part includes a column. One end of the column has a groove. The groove matches the end of the drive shaft 1. When the second handle 24 rotates, it drives the drive shaft 1 to rotate synchronously. The other end of the column is fixedly connected to the grip part, which can be gripped by hand for rotation.

[0042] As one possible implementation, two annular plates are fixedly installed on the column, with the two annular plates located on opposite sides of the two end faces of the cover 22, to limit the axial movement of the second handle 24.

[0043] It should be noted that the two adjacent cylinders 23 are detachably connected, specifically by means of snap-fit, bolt and nut fixing, etc. The cover 22 is detachably connected to the corresponding cylinder 23, specifically by means of snap-fit, bolt and nut fixing, etc.

[0044] The drive shaft 1 includes two first drive columns and a plurality of second drive columns connected sequentially between the two first drive columns. A limiting plate 18 is fixedly sleeved at one end of the first drive column, and a limiting plate 18 is fixedly sleeved at both ends of the second drive column. The limiting plate 18 is a flange structure, that is, adjacent first drive columns and second drive columns, as well as adjacent second drive columns, are fixedly connected by flanges. Specifically, during use, the corresponding number of cylinders 23, transmission mechanisms, adjusting rods, and second drive columns can be added or removed as needed.

[0045] In one possible implementation, the screw cylinder 5 adopts a square circular hole structure, and two adjacent screw cylinders 5 corresponding to each other along the axial direction of the drive shaft 1 are in contact with each other. In this way, the screw cylinders 5 are mutually limited to prevent the screw cylinders 5 from rotating with the support block 2.

[0046] In use, the anti-deformation device of this utility model is inserted into the inner surface of the circular workpiece. Then, the second handle 24 is rotated, which drives the drive shaft 1 and its second bevel gear 6 to rotate synchronously. This drives the first bevel gear 3 meshing with the second bevel gear 6 to rotate, which in turn drives multiple first bevel gears 3 of the corresponding transmission mechanism to rotate simultaneously. This, in turn, drives multiple corresponding screws 4 to rotate. Due to the mutual restraint between two adjacent screw cylinders 5 in contact, the screw cylinder 5 cannot rotate. Then, under the action of the screw 4 rotating, the screw cylinder 5 extends, which drives the corresponding support block 2 to abut against the inner surface of the circular workpiece, supporting it and effectively preventing its welding deformation. At the same time, when welding deformation of the next workpiece or when using it again, the inner surface of the workpiece with different inner diameters can be directly adjusted by rotating the second handle 24 to meet the support requirements.

[0047] For workpieces with long axial lengths, current technologies often employ multiple anti-deformation devices sequentially for internal support. However, during welding, the forces exerted vary, making it difficult to maintain consistent preload on the inner surface of the workpiece from these multiple anti-deformation devices. In contrast, the anti-deformation device of this invention incorporates multiple cylinders 23, transmission mechanisms within the cylinders 23, and corresponding adjusting rods and support blocks 2. By rotating the second handle 24, multiple second bevel gears 6 rotate synchronously, causing the screws 4 corresponding to the multiple transmission structures to rotate simultaneously. The preload on the inner surface of the workpiece from the multiple support blocks 2 corresponding to the multiple transmission structures is essentially consistent, ensuring surface uniformity of the inner surface of the workpiece after welding.

[0048] Furthermore, by moving the first handle 9 to align it with the third strip hole 12, the second bevel gear 6 at that position is disconnected from the first bevel gear 3 of the corresponding transmission structure. When the drive shaft 1 rotates, the transmission mechanism at that position does not work. This operation can be performed for positions where internal support and anti-deformation are not required, thereby extending the service life of the anti-deformation device and reducing workload.

[0049] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A device for preventing deformation of a circular workpiece, characterized in that, The system includes a positioning box, which contains a drive mechanism, a transmission mechanism, and an adjusting rod. The drive mechanism includes a drive shaft (1) located inside the positioning box. The drive mechanism is connected to multiple transmission mechanisms, and each transmission mechanism is connected to multiple adjusting rods. Each adjusting rod extends out of the side wall of the positioning box and is fixedly connected to a support block (2). The drive mechanism is used to drive the corresponding adjusting rod to extend or retract, so as to move the corresponding support block (2) closer to or away from the positioning box. The transmission mechanism is used for the transmission connection between the set of adjusting rods connected to it and the drive mechanism.

2. The anti-deformation device for a circular workpiece according to claim 1, characterized in that, Each of the transmission mechanisms includes a plurality of circumferentially arranged and sequentially meshing first bevel gears (3) and a second bevel gear (6) slidably sleeved on the drive shaft (1), wherein the second bevel gear (6) meshes with one of the first bevel gears (3); Each of the adjusting rods includes a screw (4) and a screw cylinder (5). One end of each screw (4) is fixedly connected to the corresponding first bevel gear (3), and the other end extends out of the side wall of the positioning box and is threaded into the corresponding screw cylinder (5). The screw cylinder (5) extends out of the positioning box and is fixedly connected to the support block (2).

3. The anti-deformation device for a circular workpiece according to claim 2, characterized in that, The drive shaft (1) has a plurality of strip grooves (17) extending axially around it, and each of the second bevel gears (6) has a through hole running through it from top to bottom. A plurality of strip protrusions matching the strip grooves (17) are fixedly provided on the inner wall of the through hole.

4. The anti-deformation device for a circular workpiece according to claim 2, characterized in that, The positioning box is also provided with multiple adjustment mechanisms corresponding to the transmission mechanism. Each adjustment mechanism includes a first connector, a second connector, a connecting plate (7), a connecting rod (8), and a first handle (9). The first connector is fixedly connected to the corresponding second bevel gear (6) and rotatably connected to the second connector, and both are sleeved on the drive shaft (1). The second connector is fixedly connected to a connecting plate (7) on one side. The connecting plate (7) is slidably provided with a connecting rod (8) at the end away from the second connector. The positioning box is provided with multiple adjustment holes. The end of the connecting rod (8) extends out of the adjustment hole and is fixedly connected to the first handle (9). The adjustment hole includes a first strip hole (10), a second strip hole (11) and a third strip hole (12). The first strip hole (10) and the third strip hole (12) are both arranged along the axial direction of the drive shaft (1) and the lower end of the first strip hole (10) is lower than the third strip hole (12). The upper ends of the first strip hole (10) and the third strip hole (12) are connected through the second strip hole (11).

5. The anti-deformation device for a circular workpiece according to claim 4, characterized in that, The first connector includes a first annular plate (13) fixedly disposed above the corresponding second bevel gear (6) and a first annular protrusion (14) fixedly sleeved on the outer side of the upper end of the first annular plate (13). The second connector includes a second annular plate (15) sleeved on the outer side of the first annular plate (13) and a second annular protrusion (16) fixedly disposed on the inner side of the lower end of the second annular plate (15). The second annular protrusion (16) is located between the first annular protrusion (14) and the corresponding second bevel gear (6).

6. The anti-deformation device for a circular workpiece according to claim 4, characterized in that, Each second bevel gear (6) is provided with a limiting plate (18) above it. The limiting plate (18) is fixedly sleeved on the drive shaft (1). A spring (19) is provided between the limiting plate (18) and the second connecting member. The spring (19) is sleeved on the drive shaft (1).

7. A device for preventing deformation of a circular workpiece according to claim 4, characterized in that, The connecting plate (7) has a long groove (20) with a T-shaped cross section at one end away from the second connecting member. The long groove (20) is arranged parallel to the corresponding second strip hole (11). The end of the connecting rod (8) is fixedly connected to a T-shaped rod (21) that is slidably arranged in the long groove.

8. The anti-deformation device for a circular workpiece according to claim 1, characterized in that, The positioning box includes two covers (22) and multiple cylinders (23) that are fixedly connected in sequence along the axial direction between the two covers (22), and each cylinder (23) corresponds to a transmission mechanism.

9. A device for preventing deformation of a circular workpiece according to claim 8, characterized in that, Each cover (22) is provided with a second handle (24) that rotates through it, and the two ends of the drive shaft (1) are respectively connected to the corresponding second handle (24).

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