Ball clamping device for ball valve machining
By designing a clamping device with strong adaptability, the problem of the clamping force being unable to be adjusted in the existing technology is solved, and the stable and precise positioning of the ball during the ball valve processing is achieved, thereby improving product quality and processing accuracy.
Patent Information
- Application Number
- CN202510994261.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-18
- Publication Date
- 2025-10-17
AI Technical Summary
Existing ball valve processing devices are unable to automatically adjust the clamping force and method according to changes in the processing stage, resulting in damage to the ball surface due to excessive clamping force during rough processing, and displacement of the ball due to insufficient clamping force during fine processing, affecting product quality and processing accuracy.
A ball clamping device, comprising two clamping mechanisms, was designed. It automatically adjusts the clamping force and method based on changes in processing pressure. Clamping mechanism one initially secures the ball at low pressure, while clamping mechanism two provides additional clamping force at high pressure. Through the coordination of various mechanical structures and airbags, the device ensures the ball's stability at different stages.
During the ball valve processing, the clamping force can be automatically and accurately adjusted according to the pressure changes at different stages to avoid damage and displacement of the ball surface and ensure processing accuracy and efficiency.
Smart Images
Figure CN120791479A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the ball valve processing technical field, especially to a ball clamping device for ball valve processing. BACKGROUND
[0002] In the ball valve processing field, the ball as the core component of the ball valve, its processing precision and quality directly affect the sealing performance, flow regulating ability and service life of the ball valve, and in the whole processing flow, the performance of the ball clamping device is one of the key factors to determine the processing effect.
[0003] At present, the traditional ball clamping device has significant drawbacks, and in actual processing, the clamping requirements of different processing stages and working conditions for the ball are very different, for example, in the rough machining stage, the protection of the ball surface is more critical, and the clamping force is required to be uniform and accurate to avoid damage to the ball surface, and in the finishing stage, a larger clamping force is required to stabilize the ball to cope with higher processing precision, however, the existing clamping device mostly adopts a single clamping mode, which cannot automatically adjust the clamping force and mode according to the change of the processing stage, and in rough machining, the ball surface may be left with indentation, scratches and other defects due to excessive clamping force, which seriously reduces the product quality, and in finishing, the ball may be displaced due to insufficient clamping force, which affects the processing precision and efficiency. SUMMARY
[0004] The purpose of the present application is to solve the problem in the prior art that the existing clamping device mostly adopts a single clamping mode, which cannot automatically adjust the clamping force and mode according to the change of the processing stage, and in rough machining, the ball surface may be left with indentation, scratches and other defects due to excessive clamping force, which seriously reduces the product quality, and in finishing, the ball may be displaced due to insufficient clamping force, which affects the processing precision and efficiency, and a ball clamping device for ball valve processing is proposed.
[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: A ball clamping device for ball valve processing, comprising a support frame, a mounting plate is arranged above the support frame, a fixed shell for placing a ball is welded at the center of the top of the mounting plate, two rectangular shells are symmetrically fixed and installed at the top of the support frame, and a support member is arranged in the rectangular shell, further comprising: A clamping mechanism one is arranged on the fixed shell, which is used to preliminarily fix the ball when the processing pressure is small; A clamping mechanism two is installed in the fixed shell, which is used to fix the ball again when the processing pressure increases.
[0006] Preferably, the support comprises a rectangular strip sliding in the rectangular shell, an inclined support strip is arranged between the rectangular strip and the mounting plate, both ends of the support strip are rotatably connected with the rectangular strip and the mounting plate through rotating shafts, a slidable protruding block is arranged in the rectangular strip, a spring one is fixedly installed between the protruding block and the rectangular strip, transversely distributed limiting grooves are formed in the two side surfaces of the rectangular shell, when the rectangular strip is subjected to strong pressure, the protruding block slides into different limiting grooves under the action of the spring one.
[0007] Preferably, the clamping mechanism one comprises a piston cylinder one fixedly installed in the rectangular shell, an extrusion rod is fixedly installed on the side surface of the rectangular strip close to the piston cylinder one, a piston disc one is fixedly installed on the end of the extrusion rod away from the rectangular strip, the piston disc one and the extrusion rod slide in the piston cylinder one, a spring two is sleeved on the outer surface of the extrusion rod, and both ends of the spring two are fixedly connected with the piston cylinder one and the rectangular strip.
[0008] Preferably, the clamping mechanism one further comprises a piston cylinder two fixedly installed on the mounting plate, a hose one is communicated between the piston cylinder two and the piston cylinder one, a piston disc two slides in the piston cylinder two, a slide rod is fixedly installed on the side surface of the piston disc two close to the fixed shell, the slide rod is slidably connected with the piston cylinder two and the fixed shell, a spring three is sleeved on the outer surface of the slide rod, and both ends of the spring three are fixedly connected with the piston cylinder two and the piston disc two.
[0009] Preferably, the clamping mechanism one further comprises a moving strip fixedly installed on the end of the slide rod away from the piston disc two, a spring four is fixedly installed on the side surface of the moving strip away from the slide rod, a left-right clamping plate is fixedly installed on the end of the spring four away from the moving strip, and the middle part of the left-right clamping plate is arc-shaped.
[0010] Preferably, the clamping mechanism two comprises drive rods fixedly installed on the two side surfaces of the moving strip, a moving rod slides on the inner wall of the fixed shell, an arc-shaped block is fixedly installed on the end of the moving rod close to the left-right clamping plate, a spring five is sleeved on the outer surface of the moving rod, both ends of the spring five are fixedly connected with the arc-shaped block and the fixed shell, and a driving rack is fixedly installed on the end of the moving rod away from the arc-shaped block.
[0011] Preferably, the clamping mechanism two further comprises a gear meshing with the driving rack, the gear is rotatably connected with the mounting plate, the outer surface of the gear is meshed with a driven rack, an L-shaped rod is fixedly installed on the surface of the driven rack, the L-shaped rod is slidably connected with the fixed shell, a rectangular block is fixedly installed on the end of the L-shaped rod away from the driven rack, a spring six is fixedly installed on the side surface of the rectangular block away from the L-shaped rod, a front-rear clamping plate is fixedly installed on the end of the spring six away from the rectangular block, and the middle part of the front-rear clamping plate is arc-shaped.
[0012] Preferably, the rectangular block and the moving bar are provided with a restraint mechanism, which is used to clamp the ball again when the machining pressure is strong, the restraint mechanism comprises through holes opened in the front and rear clamping plates and the left and right clamping plates, the side surface of the rectangular block and the moving bar is fixed with a restraint rod, the restraint rod slides in the through hole, and the end of the restraint rod away from the rectangular block and the moving bar is fixed with a rubber pad.
[0013] Preferably, the front and rear clamping plates and the left and right clamping plates are further provided with an auxiliary mechanism, the auxiliary mechanism comprises air cushions fixed on the front and rear clamping plates and the left and right clamping plates, air bags fixed in the front and rear clamping plates and the left and right clamping plates, a hose two communicated between the air bags and the air cushions, a cross rod fixed on the outer surface of the air bag, mounting blocks fixed in the front and rear clamping plates and the left and right clamping plates, the cross rod slides in the mounting block, a wedge-shaped block fixed on the end of the cross rod away from the air bag, and rectangular grooves opened in the front and rear clamping plates and the left and right clamping plates, the wedge-shaped block slides in the rectangular groove.
[0014] Compared with the prior art, the ball clamping device has the following advantages: 1. By the setting of the clamping mechanism one, the ball can be quickly fixed from the left and right directions when the ball is in the rough machining stage, and this clamping method can avoid leaving pressure marks or scratches on the surface of the ball when facing small machining pressure, such as pressure between 0-2MPa, and effectively protects the surface of the ball.
[0015] 2. By the setting of the clamping mechanism two, when the machining pressure is between 2-5MPa, the front and rear clamping plates are driven to fix the ball again in the front and rear directions by the cooperation of the driving rod, the moving rod, the driving rack and the gear, so as to provide stronger clamping force and effectively prevent the ball from displacement due to excessive force, thereby ensuring the machining precision.
[0016] 3. When the ball is in the fine machining stage, the machining pressure exceeds 5MPa, and stronger clamping force is needed, the ball is further clamped by the restraint mechanism through the restraint rod and the rubber pad, the rubber pad increases the friction with the surface of the ball while avoiding scratching the ball, the ball is further stabilized in the high pressure working condition to prevent displacement, and the auxiliary mechanism is further provided, the wedge-shaped block slides in the rectangular groove as the pressure changes, so that the wedge-shaped block can adapt to the shape and force of the ball and closely fit the surface of the ball, which to some extent enhances the clamping stability and further ensures the position precision of the ball in the machining process.
[0017] In summary, the ball clamping device for ball valve machining can automatically and accurately adjust the clamping force according to the pressure change in different machining stages, can avoid damage to the surface of the ball due to excessive clamping force in the rough machining stage of the ball, and can avoid displacement of the ball due to insufficient clamping force in the fine machining stage of the ball, thereby affecting the machining precision and efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 Fig. 1 is a perspective view of a ball clamping device for ball valve machining according to the present application; Figure 2 Fig. 2 is a schematic view of the internal structure of a rectangular shell of a ball clamping device for ball valve machining according to the present application; Figure 3 Fig. 3 is a schematic view of the internal structure of a fixed shell of a ball clamping device for ball valve machining according to the present application; Figure 2 Fig. 4 is an enlarged view of structure A in Fig. 3; Figure 4 Fig. 5 is an enlarged view of structure B in Fig. 3; Figure 2 Fig. 6 is an enlarged view of structure C in Fig. 3; Figure 5 Fig. 7 is a schematic view of the internal structure of a fixed shell of a ball clamping device for ball valve machining according to the present application; Figure 6 Fig. 8 is an enlarged view of structure D in Fig. 7; Figure 5 Fig. 9 is a top view of the internal structure of a fixed shell of a ball clamping device for ball valve machining according to the present application; Figure 7 Fig. 10 is an enlarged view of structure E in Fig. 7. Figure 8 Fig. 11 is a perspective view of a ball clamping device for ball valve machining according to the present application. Figure 7 Fig. 12 is a schematic view of the internal structure of a fixed shell of a ball clamping device for ball valve machining according to the present application.
[0019] In the drawings: 1, support frame; 11, mounting plate; 12, fixed shell; 13, rectangular shell; 14, rectangular strip; 15, support strip; 16, spring one; 17, protruding block; 18, limiting groove; 21, piston cylinder one; 22, extrusion rod; 23, piston disc one; 24, spring two; 25, hose one; 26, piston cylinder two; 27, piston disc two; 28, sliding rod; 29, spring three; 210, moving strip; 211, spring four; 212, left and right clamping plate; 31, drive rod; 32, moving rod; 33, arc-shaped block; 34, spring five; 35, driving rack; 36, gear; 37, driven rack; 38, L-shaped rod; 39, rectangular block; 310, spring six; 311, front and rear clamping plate; 41, through hole; 42, constraint rod; 43, rubber pad; 51, air cushion; 52, hose two; 53, air bag; 54, cross rod; 55, mounting block; 56, wedge-shaped block; 57, rectangular groove. DETAILED DESCRIPTION
[0020] Clearly, the embodiments described are only a part of the embodiments of the present application, and not all the embodiments, based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of the present application.
[0021] Embodiment one, refer to Figures 1-8 A ball clamping device for ball valve machining, comprising a support frame 1, the upper part of the support frame 1 is provided with a mounting plate 11, the center of the top of the mounting plate 11 is welded with a fixed shell 12 for placing a ball, the top of the support frame 1 is symmetrically fixedly provided with two rectangular shells 13, the rectangular shell 13 is provided with a support piece, further comprising: The clamping mechanism one is arranged on the fixed shell 12, when the machining pressure is small, the clamping mechanism one is used for preliminarily fixing the ball; The clamping mechanism two is installed in the fixed shell 12, when the machining pressure increases, the clamping mechanism two is used for fixing the ball again.
[0022] Further, the support piece comprises a rectangular strip 14 sliding in the rectangular shell 13, an inclined support strip 15 is arranged between the rectangular strip 14 and the mounting plate 11, both ends of the support strip 15 are rotatably connected with the rectangular strip 14 and the mounting plate 11 through rotating shafts, a movable lug 17 is arranged in the rectangular strip 14, a spring one 16 is fixedly installed between the movable lug 17 and the rectangular strip 14, limit grooves 18 are horizontally arranged on both side surfaces of the rectangular shell 13, when the rectangular strip 14 is subjected to strong pressure, the movable lug 17 slides into different limit grooves 18 under the action of the spring one 16.
[0023] Further, the clamping mechanism one comprises a piston cylinder one 21 fixedly installed in the rectangular shell 13, an extrusion rod 22 is fixedly arranged on one side of the rectangular strip 14 close to the piston cylinder one 21, a piston disc one 23 is fixedly arranged on the end of the extrusion rod 22 away from the rectangular strip 14, the piston disc one 23 and the extrusion rod 22 both slide in the piston cylinder one 21, a spring two 24 is sleeved on the outer surface of the extrusion rod 22 and both ends of the spring two 24 are fixedly connected with the piston cylinder one 21 and the rectangular strip 14.
[0024] Further, the clamping mechanism one further comprises a piston cylinder two 26 fixedly installed on the mounting plate 11, a soft tube one 25 is communicated between the piston cylinder two 26 and the piston cylinder one 21, a piston disc two 27 slides in the piston cylinder two 26, a sliding rod 28 is fixedly arranged on the side of the piston disc two 27 close to the fixed shell 12, the sliding rod 28 is slidably connected with the piston cylinder two 26 and the fixed shell 12, a spring three 29 is sleeved on the outer surface of the sliding rod 28, both ends of the spring three 29 are fixedly connected with the piston cylinder two 26 and the piston disc two 27.
[0025] Further, the clamping mechanism I further comprises a moving strip 210 fixed at the end of the slide rod 28 away from the piston disc II 27, a spring IV 211 is fixed at the side of the moving strip 210 away from the slide rod 28, and a left and right clamping plate 212 is fixed at the end of the spring IV 211 away from the moving strip 210, and the middle part of the left and right clamping plate 212 is arc-shaped.
[0026] In view of the prior art, a single clamping mode is mostly adopted, and the clamping force and mode cannot be automatically adjusted according to the change of the processing stage. In rough machining, the clamping force may be too large, leaving marks or scratches on the surface of the sphere, which seriously reduces the product quality. In finish machining, the clamping force may be insufficient, causing displacement of the sphere, affecting the machining precision and efficiency. The present application makes the following improvements: When the sphere is not processed, the convex block 17 is located in the rightmost limiting groove 18, the sphere is placed between the two left and right clamping plates 212, and the pressure is between 0-2MPa in rough machining. The sphere can be subjected to pressure, the convex block 17 slides to the inside of the rectangular strip 14 under the action of the elastic force of the spring I 16 and the applied pressure, so that the convex block 17 is separated from the rightmost limiting groove 18, thereby driving the rectangular strip 14 to slide in the rectangular shell 13 to the direction of the piston cylinder I 21, until the convex block 17 moves to the adjacent limiting groove 18. At this time, the convex block 17 is inserted into the adjacent limiting groove 18 again under the elastic force of the spring I 16, and the rectangular strip 14 is locked.
[0027] When the rectangular strip 14 moves, the extrusion rod 22 is also driven to move, the extrusion rod 22 drives the piston disc I 23 to slide in the piston cylinder I 21, extruding the liquid in the piston cylinder I 21, the liquid is transmitted to the piston cylinder II 26 through the hose I 25, and the piston disc II 27 is driven to move, extruding the spring III 29, the piston disc II 27 drives the slide rod 28 to extend, the slide rod 28 drives the moving strip 210 to move, and the moving strip 210 drives the spring IV 211 and the left and right clamping plate 212 to quickly fix the sphere from the left and right directions.
[0028] The above further advantage is that when the sphere is in the rough machining stage, the sphere can be quickly fixed from the left and right directions. This clamping mode can avoid leaving marks or scratches on the surface of the sphere due to rigid clamping when facing small processing pressure, such as pressure between 0-2MPa, effectively ensuring the surface quality of the sphere and laying a good foundation for subsequent processing.
[0029] Embodiment two, refer to Figures 1-8The utility model provides a ball clamping device for ball valve processing, which comprises a support frame 1, an installation plate 11 arranged on the upper portion of the support frame 1, a fixed shell 12 for placing a ball welded at the center of the top of the installation plate 11, two symmetrical rectangular shells 13 fixedly installed on the top of the support frame 1, and a support arranged in the rectangular shell 13. The clamping mechanism one arranged on the fixed shell 12 is used for preliminarily fixing the ball when the processing pressure is small. The clamping mechanism two installed in the fixed shell 12 is used for fixing the ball again when the processing pressure increases.
[0030] Further, the clamping mechanism two comprises a driving rod 31 fixed on the two side faces of the moving strip 210, a moving rod 32 slidingly arranged on the inner wall of the fixed shell 12, an arc-shaped block 33 fixed on one end of the moving rod 32 close to the left and right clamping plates 212, a spring five 34 sleeved on the outer surface of the moving rod 32, the two ends of the spring five 34 fixedly connected with the arc-shaped block 33 and the fixed shell 12 respectively, and a driving rack 35 fixed on one end of the moving rod 32 away from the arc-shaped block 33.
[0031] Further, the clamping mechanism two further comprises a gear wheel 36 engaged with the driving rack 35, the gear wheel 36 is rotatably connected with the installation plate 11, the outer surface of the gear wheel 36 is engaged with a driven rack 37, an L-shaped rod 38 is fixedly arranged on the surface of the driven rack 37, the L-shaped rod 38 is slidingly connected with the fixed shell 12, a rectangular block 39 is fixed on one end of the L-shaped rod 38 away from the driven rack 37, a spring six 310 is fixed on one side of the rectangular block 39 away from the L-shaped rod 38, a front and rear clamping plate 311 is fixed on one end of the spring six 310 away from the rectangular block 39, and the middle portion of the front and rear clamping plate 311 is arranged in an arc shape.
[0032] If the pressure reaches 2-5 MPa in the rough machining stage, the convex block 17 will be displaced under the pressure, the convex block 17 will be moved into the third limiting groove 18, the extrusion rod 22, the piston disc one 23, the piston disc two 27 and the sliding rod 28 will also relatively displace a certain distance, so that the moving strip 210 continuously moves towards the left and right clamping plates 212, the extrusion degree of the spring four 211 is stronger, and the clamping force on the ball is further strengthened, in addition, when the moving strip 210 continuously moves towards the left and right clamping plates 212, the driving rod 31 also moves, when the driving rod 31 moves to contact the arc-shaped block 33, the arc-shaped block 33 is subjected to backward pressure, the moving rod 32 is pushed to move, the spring five 34 is compressed, the moving rod 32 drives the driving rack 35 at the other end to move, so as to drive the gear wheel 36 to rotate, the gear wheel 36 engages the driven rack 37, the L-shaped rod 38 drives the rectangular block 39 to move, under the action of the spring six 310, the front and rear clamping plate 311 is fixed on the ball again from the front and rear directions.
[0033] The further advantage is that when the machining pressure is 2-5 MPa, the front and rear clamping plates 311 are driven in the front and rear directions to fix the ball again, providing stronger clamping force, effectively preventing displacement of the ball due to excessive force, ensuring machining precision, and protecting the surface of the ball from damage while ensuring clamping force.
[0034] Embodiment three, refer to Figures 1-8 A ball clamping device for ball valve machining, comprising a support frame 1, an installation plate 11 is arranged on the top of the support frame 1, a fixed shell 12 for placing the ball is welded at the center of the top of the installation plate 11, two symmetrical rectangular shells 13 are fixedly installed on the top of the support frame 1, and a support member is arranged in the rectangular shell 13, further comprising: A clamping mechanism one is arranged on the fixed shell 12, which is used to preliminarily fix the ball when the machining pressure is small; A clamping mechanism two is installed in the fixed shell 12, which is used to fix the ball again when the machining pressure increases.
[0035] Further, a constraint mechanism is arranged on the rectangular block 39 and the moving strip 210, which is used to clamp the ball again when the machining pressure is strong, the constraint mechanism comprises through holes 41 arranged in the front and rear clamping plates 311 and the left and right clamping plates 212, constraint rods 42 are fixed on the side surfaces of the rectangular block 39 and the moving strip 210, the constraint rods 42 slide in the through holes 41, and rubber pads 43 are fixed on the ends of the constraint rods 42 away from the rectangular block 39 and the moving strip 210.
[0036] Further, an auxiliary mechanism is arranged in the front and rear clamping plates 311 and the left and right clamping plates 212, the auxiliary mechanism comprises air cushions 51 fixed on the front and rear clamping plates 311 and the left and right clamping plates 212, air bags 53 are fixed in the front and rear clamping plates 311 and the left and right clamping plates 212, a hose two 52 is arranged in communication between the air bags 53 and the air cushions 51, a cross rod 54 is fixed on the outer surface of the air bags 53, mounting blocks 55 are fixed in the front and rear clamping plates 311 and the left and right clamping plates 212, the cross rod 54 slides in the mounting blocks 55, a wedge-shaped block 56 is fixed on the end of the cross rod 54 away from the air bags 53, rectangular grooves 57 are arranged in the front and rear clamping plates 311 and the left and right clamping plates 212, and the wedge-shaped block 56 slides in the rectangular grooves 57.
[0037] In the fine processing stage, the processing pressure exceeds 5 MPa, under the action of the processing pressure, the convex block 17 will slide from the third limiting groove 18 to the fourth limiting groove 18, at this time, through the movement of the convex block 17 and the rectangular strip 14, the moving strip 210 and the rectangular block 39 will continue to move to the direction of the left and right clamps 212 and the front and rear clamps 311, and the driving rod 31 is also displaced to the center of the arc-shaped block 33, when the moving strip 210 and the rectangular block 39 move to the direction of the left and right clamps 212 and the front and rear clamps 311, the constraint rod 42 will also move to the direction of the ball through the through hole 41, until the constraint rod 42 contacts the ball, and the plurality of constraint rods 42 contact the ball from different directions, which is equivalent to increasing the constraint condition of the ball, limiting the movement of the ball in multiple degrees of freedom, and cooperating with the front and rear clamps 311 and the left and right clamps 212 to form a more stable clamping structure, which can effectively resist various forces generated in the processing process, so that the clamping is more stable, and the rubber pad 43 increases the friction with the surface of the ball while avoiding scratching the ball.
[0038] When the moving strip 210 and the rectangular block 39 continue to move, the air cushion 51 will also be extruded, so that the gas in the air cushion 51 enters the air bag 53 through the hose two 52, so that the air bag 53 expands, and because the cross rod 54 is limited by sliding with the mounting block 55, the air bag 53 drives the cross rod 54 to move to the direction of the ball, so that the wedge-shaped block 56 slides out of the rectangular groove 57, and through the shape of the wedge-shaped block 56, it is more closely attached to the surface of the ball, to a certain extent, the clamping stability is enhanced, and the position accuracy of the ball in the processing process is further ensured.
[0039] The further advantages of the above are that the clamping force can be automatically and accurately adjusted according to the pressure change of different processing stages, in the rough machining stage of the ball, the damage to the surface of the ball caused by excessive clamping force can be avoided, and in the fine machining stage of the ball, the displacement of the ball caused by insufficient clamping force can be avoided, which affects the processing precision and efficiency.
[0040] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A ball clamping device for ball valve processing, comprising a support frame (1), characterized in that: A mounting plate (11) is provided above the support frame (1), a fixed shell (12) for placing a sphere is welded at the center of the top of the mounting plate (11), two rectangular shells (13) are symmetrically fixedly installed on the top of the support frame (1), a support member is provided in the rectangular shell (13), and the support member includes a rectangular bar (14) sliding in the rectangular shell (13), an inclined support bar (15) is provided between the rectangular bar (14) and the mounting plate (11), and the two sides of the support bar (15) are The ends are rotatably connected to the rectangular strip (14) and the mounting plate (11) through a rotating shaft, a slidable protrusion (17) is provided in the rectangular strip (14), a spring (16) is fixedly installed between the protrusion (17) and the rectangular strip (14), and two side surfaces of the rectangular shell (13) are provided with transversely distributed limiting grooves (18). When the rectangular strip (14) is subjected to a strong pressure, the protrusion (17) slides into different limiting grooves (18) under the action of the spring (16), and further includes: A clamping mechanism 1 is provided on the fixed shell (12). When the processing pressure is relatively low, the clamping mechanism 1 is used to preliminarily fix the sphere. The clamping mechanism 1 includes a piston cylinder 1 (21) fixedly installed in the rectangular shell (13). An extrusion rod (22) is fixed to a side of the rectangular strip (14) close to the piston cylinder 1 (21). A piston disc 1 (23) is fixed to an end of the extrusion rod (22) away from the rectangular strip (14). Both the piston disc 1 (23) and the extrusion rod (22) slide in the piston cylinder 1 (21). A spring 2 (24) is provided on the outer surface of the extrusion rod (22). The two ends of the spring 2 (24) are fixedly connected to the piston cylinder 1 (21) and the rectangular strip (14) respectively. The clamping mechanism 1 also includes a piston cylinder 2 (26) fixed on the mounting plate (11). The piston cylinder 2 (26) is connected to the piston cylinder 1 (21). Hose one (25), a piston disc two (27) slides inside the piston cylinder two (26), a slide rod (28) is fixed to the side of the piston disc two (27) close to the fixed shell (12), the slide rod (28) is slidably connected to the piston cylinder two (26) and the fixed shell (12), the outer surface of the slide rod (28) is sleeved with a spring three (29), the two ends of the spring three (29) are respectively fixedly connected to the piston cylinder two (26) and the piston disc two (27), the clamping mechanism one also includes a moving bar (210) fixed to the end of the slide rod (28) away from the piston disc two (27), the side of the moving bar (210) away from the slide rod (28) is fixed with a spring four (211), the end of the spring four (211) away from the moving bar (210) is fixed with left and right clamping plates (212), and the middle parts of the left and right clamping plates (212) are arranged in an arc shape; A clamping mechanism 2 is installed in the fixed shell (12). When the processing pressure increases, the clamping mechanism 2 is used to fix the ball again. The clamping mechanism 2 includes a driving rod (31) fixed on both sides of the moving bar (210). A moving rod (32) is slidably provided on the inner wall of the fixed shell (12). An arc block (33) is fixed to one end of the moving rod (32) close to the left and right clamping plates (212). A spring 5 (34) is sleeved on the outer surface of the moving rod (32). The two ends of the spring 5 (34) are fixedly connected to the arc block (33) and the fixed shell (12) respectively. An active rack (35) is fixed to one end of the moving rod (32) away from the arc block (33). The clamping mechanism 2 also includes a driving rack (35) connected to the main a gear (36) meshing with the movable rack (35), the gear (36) being rotatably connected to the mounting plate (11), the outer surface of the gear (36) being meshed with a driven rack (37), the surface of the driven rack (37) being fixed with an L-shaped rod (38), the L-shaped rod (38) being slidably connected to the fixed shell (12), the end of the L-shaped rod (38) away from the driven rack (37) being fixed with a rectangular block (39), the side of the rectangular block (39) away from the L-shaped rod (38) being fixed with a spring six (310), the end of the spring six (310) away from the rectangular block (39) being fixed with front and rear clamping plates (311), the middle portions of the front and rear clamping plates (311) being arranged in an arc shape; A restraining mechanism is provided on the rectangular block (39) and the movable bar (210). When the processing pressure is strong, the restraining mechanism is used to clamp the sphere again. The restraining mechanism includes a through hole (41) provided in the front and rear clamping plates (311) and the left and right clamping plates (212). A restraining rod (42) is fixed to the side of the rectangular block (39) and the movable bar (210). The restraining rod (42) slides in the through hole (41). A rubber pad (43) is fixed to one end of the restraining rod (42) away from the rectangular block (39) and the movable bar (210). An auxiliary mechanism is further provided in the front and rear splints (311) and the left and right splints (212), and the auxiliary mechanism includes an air cushion (51) fixed on the front and rear splints (311) and the left and right splints (212), an air bag (53) is fixed in the front and rear splints (311) and the left and right splints (212), a hose (52) is connected between the air bag (53) and the air cushion (51), a cross bar (54) is fixed on the outer surface of the air bag (53), a mounting block (55) is fixed in the front and rear splints (311) and the left and right splints (212), the cross bar (54) slides in the mounting block (55), a wedge block (56) is fixed at one end of the cross bar (54) away from the air bag (53), a rectangular groove (57) is opened on the front and rear splints (311) and the left and right splints (212), and the wedge block (56) slides in the rectangular groove (57).