Machining clamp for uniform stress of thin-wall cylindrical part

Abstract

The invention discloses a machining clamp for uniform stress of a thin-wall cylindrical part, and relates to the technical field of machining clamps, the machining clamp comprises an opening shaping ring, and a plurality of chain plate strips which are connected with one another and are used for clamping and supporting are arranged on the surface of the opening shaping ring. The device has the advantages that the opening shaping ring is supported through the rigid supporting rod and the pulling strip, the rigid supporting ring can be controlled to stretch out and draw back according to the size of the thin-wall cylindrical part to drive the pulling strip to adjust the supporting size of the opening shaping ring, and the opening shaping ring drives the chain plate strip to change the length through deformation; the inner wall of the thin-wall cylindrical part is supported through the ring structure formed by supporting the chain plate strips through the opening shaping rings, meanwhile, the chain plate strips are protected and guided through the rolling seats and the smooth rolling shafts arranged in the opening shaping rings, and the sizes of the chain plate strips can be adjusted according to the size of the thin-wall cylindrical part so that the thin-wall cylindrical part can be fully supported and clamped; and the thin-wall cylindrical part is stressed uniformly, and the clamping deformation degree is reduced.

Description

Technical Field

[0001] This invention relates to the field of machining fixture technology, specifically to a machining fixture for thin-walled cylindrical parts that uniformly distributes force. Background Technology

[0002] In the field of machining, thin-walled cylindrical parts are widely used in aerospace, automotive manufacturing, and electronic equipment industries due to their light weight and compact structure. Their cylindricity, circular runout, and other geometric tolerances are subject to stringent requirements, and the clamping accuracy of the machining fixture directly determines the final quality of the workpiece. However, the deformation problem of thin-walled parts has always been difficult to solve, especially for non-ferrous metals such as aluminum and magnesium alloys, which are extremely prone to deformation during machining and heat treatment, severely affecting the quality of the parts.

[0003] Traditional fixtures mostly use rigid clamping structures such as three-jaw chucks to fix the workpiece by applying force at one or three points. This results in problems such as concentrated force and large clamping deformation, which can no longer meet the high-precision machining requirements of thin-walled cylindrical parts.

[0004] To address the aforementioned issues, a machining fixture for thin-walled cylindrical parts with uniform force distribution is proposed. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a machining fixture for thin-walled cylindrical parts that distributes force evenly. This fixture offers advantages such as providing sufficient support and clamping for the thin-walled cylindrical parts, ensuring uniform force distribution, and reducing deformation during clamping. It also solves the problems of concentrated force and large clamping deformation.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a processing fixture for uniformly stressed thin-walled cylindrical parts, comprising a central fixed shaft as the supporting body, wherein a plurality of rigid support rods that can be telescopically adjusted are installed inside the central fixed shaft, a pull bar is fixedly installed at one end of the rigid support rod for connection and fixation, a plurality of open shaping rings made of elastic metal are fixedly installed at one end of the pull bar, a plurality of interconnected and clamping chain plates are provided on the surface of the open shaping rings, chain plate rollers are wound around both ends of the chain plates for winding, a fixed roller frame is fixedly installed at one end of the chain plate rollers for support, a winding power unit for providing driving force is fixedly installed inside the fixed roller frame, a rolling seat for connection and support is provided at the opening of the open shaping rings, a smooth roller for guiding and protecting the chain plates is rotatably connected inside the rolling seat, and the winding power unit is signal-connected to a PLC main controller for automatic control.

[0007] Preferably, the central fixed shaft includes a central shaft body for support, a pneumatic telescopic rod for telescopic adjustment, and a positioning end plate for positioning and pressing. The pneumatic telescopic rod is fixedly installed at one end of the central shaft body, and the positioning end plate with an L-shaped structure is fixedly installed at one end of the pneumatic telescopic rod.

[0008] Specifically, the central shaft (made of 45# steel) of the central fixed shaft is the core support component. The pneumatic telescopic rod (electrically connected to the main controller) is fixed to one end of the central shaft, and the positioning end plate (L-shaped structure, made of stainless steel) is fixed to the output end of the pneumatic telescopic rod. The central shaft provides rigid support for the overall structure, ensuring no deformation during clamping. The pneumatic telescopic rod drives the positioning end plate to move axially, realizing the axial positioning of the thin-walled cylindrical part and avoiding axial movement during processing. The L-shaped positioning end plate increases the contact area with the end face of the workpiece, disperses the axial pressure, and prevents damage to the end face of the workpiece. The three components work together to achieve the center positioning and axial limit of the fixture, laying the foundation for subsequent uniform clamping.

[0009] Preferably, the rigid support rod includes a pneumatic adjustment rod for telescopic adjustment and a fixed block for support connection. The pneumatic adjustment rod is fixedly installed on the central shaft. One end of the pneumatic adjustment rod is fixedly installed with the fixed block located on one side of the central shaft. The pull bar is fixedly installed on the end of the fixed block away from the pneumatic adjustment rod. The length of the pull bar is less than the length of the central shaft.

[0010] Specifically, the pneumatic adjusting rods of the rigid support rod (electrically connected to the main controller) are evenly distributed and fixed to the central shaft. The fixing block (made of aluminum alloy) is fixed to one end of the pneumatic adjusting rod, and the pull bar (made of high-strength alloy steel) is fixed to the end of the fixing block away from the pneumatic adjusting rod. Its length is shorter than that of the central shaft. The pneumatic adjusting rod provides radial extension and retraction driving force, which drives the fixing block and the pull bar to precisely adjust the radial position, adapting to thin-walled cylindrical parts with different inner diameters. The fixing block realizes a stable connection between the pneumatic adjusting rod and the pull bar, avoiding failure of tension transmission. The pull bar converts the radial force of the pneumatic adjusting rod into a tension force on the open shaping ring, causing the open shaping ring to expand or contract. The circumferentially evenly distributed design ensures balanced radial force and avoids local force concentration on the workpiece. The length design of the pull bar avoids interference with the positioning end plate and ensures smooth movement.

[0011] Preferably, one end of the open shaping ring is provided with a movable groove for mounting the rolling seat, and several chain plates are arranged around the circumference of the central shaft. The two ends of the chain plates are respectively provided with connecting grooves and connecting platforms for connection, and the several chain plates are rotatably connected to each other through the connecting grooves and connecting platforms.

[0012] Specifically, the open-end shaping ring (made of elastic spring steel) has a movable groove for mounting the rolling seat. Several chain plates (made of stainless steel) are distributed around the central shaft. Each end has a connecting groove and a connecting platform, which are connected to each other by rotation. The open-end shaping ring uses elastic deformation to adjust its diameter, providing a basic support frame for the chain plates. The chain plates are connected to each other to form a flexible support ring that fits the inner wall of the thin-walled cylindrical part, achieving uniform support around the circumference. The rotating connection design of the connecting groove and the connecting platform allows the chain plates to adaptively adjust their angle according to the deformation of the open-end shaping ring, ensuring continuous support surface. The open-end shaping ring, made of elastic material, has both support rigidity and deformation capacity, avoiding excessive support that could cause workpiece deformation. The movable groove provides installation and movement space for the rolling seat.

[0013] Preferably, the fixed roller frame is fixedly installed on the surface of the central shaft and located on one side of the pneumatic telescopic rod, and one end of the fixed roller frame is provided with a rotating groove for connecting the chain plate roller.

[0014] Specifically, the fixed roller frame (made of cast iron) is fixed to the surface of the central shaft, located on one side of the pneumatic telescopic rod, and coaxial with the central shaft. A rotating groove is opened at one end for connecting the chain roller. The fixed roller frame provides stable support for the chain roller, ensuring smooth rotation of the chain roller. The cast iron material is rigid and can withstand the tension when the chain strip is wound. The coaxial design with the central shaft ensures that the chain roller rotates synchronously with the central shaft, avoiding chain strip winding deviation. The smooth surface of the rotating groove reduces the rotational wear of the chain roller and extends its service life. The installation position avoids the pneumatic telescopic rod to avoid motion interference.

[0015] Preferably, the winding power unit includes a servo motor that provides driving force and a pulley assembly that transmits power. The servo motor is fixedly installed inside the central shaft, and the output end of the servo motor is fixedly installed with the pulley assembly that is fixedly installed with the chain roller.

[0016] Specifically, the servo motor of the winding power unit (electrically connected to the main controller) is fixed inside the central shaft, the pulley assembly (aluminum alloy material) is fixed to the output end of the servo motor, the driven wheel is fixedly connected to the chain roller, the servo motor provides precise rotational power, and through the pulley assembly to reduce speed and increase torque, it drives the chain roller to rotate smoothly. The pulley assembly realizes power transmission and speed reduction, adapting to the winding speed of the chain. The precise positioning function of the servo motor ensures that the winding length of the chain is consistent, ensuring the accurate size of the support ring. The built-in installation design saves space and avoids interference with external components. The power unit and the rigid support rod work together to realize the synchronous adjustment of the chain, ensuring uniform support.

[0017] Preferably, the rolling seat includes a telescopic arc plate made of elastic metal and a connecting seat for fixing. The telescopic arc plate is slidably connected to the inside of the open shaping ring. One end of the telescopic arc plate is fixedly installed with the connecting seat located on one side of the open shaping ring. The other end of the telescopic arc plate is provided with a limiting block for limiting its movement. The smooth roller is rotatably connected to the inside of the connecting seat.

[0018] Specifically, the telescopic arc plate of the rolling seat (made of elastic spring steel, with an arc adapted to the open shaping ring) is slidably connected to the movable groove of the open shaping ring. The connecting seat (made of aluminum alloy) is fixed to one end of the telescopic arc plate, and a limiting block is provided at the other end of the telescopic arc plate. The smooth roller (made of stainless steel) is rotatably connected inside the connecting seat. The telescopic arc plate uses elastic deformation to adapt to the deformation of the open shaping ring, ensuring that the smooth roller is always in contact with the chain plate. The connecting seat provides stable installation support for the smooth roller. The smooth roller converts the sliding friction between the chain plate and the rolling seat into rolling friction, reducing the wear of the chain plate. The limiting block prevents the telescopic arc plate from coming out of the movable groove, ensuring structural safety. The rolling guide design prevents the chain plate from shifting when it is wound up, ensuring that the support ring is flat.

[0019] (III) Beneficial Effects Compared with the prior art, the present invention provides a machining fixture for thin-walled cylindrical parts to be uniformly stressed, which has the following beneficial effects: This processing fixture for thin-walled cylindrical parts with uniform force distribution uses a central fixed axis coaxial with the thin-walled cylindrical part as the support base to fix a rigid support rod. The rigid support rod and the pull bar support the open shaping ring. The rigid support ring can be extended and retracted according to the size of the thin-walled cylindrical part, which drives the pull bar to adjust the support size of the open shaping ring. The open shaping ring causes the chain plate to change length through deformation. The open shaping ring supports the chain plate to form a ring structure that supports the inner wall of the thin-walled cylindrical part. At the same time, the rolling seat and smooth roller set inside the open shaping ring protect and guide the chain plate, ensuring the stability of the chain plate adjustment. The size of the chain plate can be adjusted according to the size of the thin-walled cylindrical part to achieve sufficient support and clamping, so that the thin-walled cylindrical part is subjected to uniform force, reducing the degree of clamping deformation and improving the clamping stability of the thin-walled cylindrical part. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first-view structure proposed in this invention. Figure 2 This is a schematic diagram of the second-view structure proposed in this invention. Figure 3 This invention proposes Figure 2 Enlarged structural diagram at point A in the middle. Figure 4 This is a schematic cross-sectional view of the chain plate structure proposed in this invention.

[0021] In the diagram: 1-Central fixed shaft, 11-Central shaft body, 12-Pneumatic telescopic rod, 13-Positioning end plate, 2-Rigid support rod, 21-Pneumatic adjusting rod, 22-Fixing block, 3-Pull bar, 4-Open shaping ring, 5-Chain plate bar, 6-Chain plate roller, 7-Fixing roller frame, 8-Winding power unit, 81-Servo motor, 82-Pulley group, 9-Rolling seat, 91-Telescopic arc plate, 92-Connecting seat, 10-Smooth roller. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-4 A processing fixture for uniformly stressed thin-walled cylindrical parts includes a central fixed shaft 1 as the supporting body. Several rigid support rods 2, which are telescopically adjustable, are installed inside the central fixed shaft 1. A pull bar 3 is fixedly installed at one end of each rigid support rod 2 for connection and fixation. Several open-ended shaping rings 4 made of elastic metal are fixedly installed at one end of each pull bar 3. Several interconnected and clamping chain plates 5 are provided on the surface of the open-ended shaping rings 4. Chain plate rollers 6 are wound around both ends of the chain plates 5 to wind them. A fixed roller frame 7 is fixedly installed at one end of each chain plate roller 6 to support it. A winding power unit 8, which provides driving force, is fixedly installed inside the fixed roller frame 7. A rolling seat 9, which provides connection and support, is provided at the opening of the open-ended shaping rings 4. A smooth roller 10, which guides and protects the chain plates 5, is rotatably connected inside the rolling seat 9. The winding power unit 8 is signal-connected to a PLC main controller for automated control.

[0024] Preferably, the central fixed shaft 1 includes a central shaft body 11 for support, a pneumatic telescopic rod 12 for telescopic adjustment, and a positioning end plate 13 for positioning and pressing. The pneumatic telescopic rod 12 is fixedly installed at one end of the central shaft body 11, and the positioning end plate 13 with an L-shaped structure is fixedly installed at one end of the pneumatic telescopic rod 12.

[0025] The central shaft 11 (made of 45# steel) of the central fixed shaft 1 is the core support component. The pneumatic telescopic rod 12 (electrically connected to the main controller) is fixed to one end of the central shaft 11. The positioning end plate 13 (L-shaped structure, made of stainless steel) is fixed to the output end of the pneumatic telescopic rod 12. The central shaft 11 provides rigid support for the overall structure to ensure no deformation during clamping. The pneumatic telescopic rod 12 drives the positioning end plate 13 to move axially, realizing the axial positioning of the thin-walled cylindrical part and avoiding axial movement during processing. The L-shaped positioning end plate 13 increases the contact area with the end face of the workpiece, disperses the axial pressure, and prevents damage to the end face of the workpiece. The three components work together to achieve the center positioning and axial limit of the fixture, laying the foundation for subsequent uniform clamping.

[0026] Based on the rigid support principle, the high strength of 45 steel ensures that the central shaft 11 does not deform under clamping force. Based on the pneumatic drive principle, the pneumatic telescopic rod 12 achieves precise extension and retraction through air pressure changes, driving the positioning end plate 13 to adjust axially. Based on the surface contact positioning principle, the large-area contact design of the L-shaped end plate reduces local pressure and avoids workpiece damage. Based on the cooperative positioning principle, the central reference of the central shaft and the axial limiting fit of the positioning end plate ensure that the workpiece and the fixture are coaxial. The central fixed shaft 1 is installed on the spindle of the processing equipment, and the coaxiality of the central shaft 11 is calibrated. The thin-walled cylindrical part is sleeved on the outside of the central shaft 11. The main controller controls the pneumatic telescopic rod 12 to extend, and the positioning end plate 13 fits against the end face of the workpiece to complete the axial positioning. During the processing, the positioning end plate 13 remains in a pressed state to prevent the workpiece from moving axially. After the processing is completed, the pneumatic telescopic rod 12 retracts, the workpiece is removed, the central shaft and the positioning end plate are cleaned regularly, and the positioning accuracy of the pneumatic telescopic rod and the straightness of the central shaft are checked regularly.

[0027] Preferably, the rigid support rod 2 includes a pneumatic adjustment rod 21 for telescopic adjustment and a fixed block 22 for support connection. The pneumatic adjustment rod 21 is fixedly installed on the central shaft 11. One end of the pneumatic adjustment rod 21 is fixedly installed with the fixed block 22 located on one side of the central shaft 11. The pull bar 3 is fixedly installed on the end of the fixed block 22 away from the pneumatic adjustment rod 21. The length of the pull bar 3 is less than the length of the central shaft 11.

[0028] The pneumatic adjustment rods 21 (electrically connected to the main controller) of the rigid support rod 2 are evenly distributed and fixed to the central shaft 11. The fixing block 22 (aluminum alloy material) is fixed to one end of the pneumatic adjustment rod 21. The pull bar 3 (high-strength alloy steel material) is fixed to the end of the fixing block 22 away from the pneumatic adjustment rod 21 and is shorter than the central shaft 11. The pneumatic adjustment rod 21 provides radial extension and retraction driving force, which drives the fixing block 22 and the pull bar 3 to accurately adjust the radial position, adapting to thin-walled cylindrical parts with different inner diameters. The fixing block 22 realizes a stable connection between the pneumatic adjustment rod and the pull bar, avoiding failure of tension transmission. The pull bar 3 converts the radial force of the pneumatic adjustment rod into a tension force on the open shaping ring 4, which drives the open shaping ring to expand or contract. The circumferentially evenly distributed design ensures balanced radial force and avoids local force concentration on the workpiece. The length design of the pull bar avoids interference with the positioning end plate 13 and ensures smooth movement.

[0029] Based on the radial adjustment principle, the extension and retraction of the pneumatic adjusting rod 21 achieves precise radial position control, adapting to different workpiece sizes. Based on the force transmission principle, the pull bar 3 transmits radial force to the open shaping ring 4 through a rigid connection, driving its deformation. Based on the uniform force principle, the circumferentially evenly distributed support rods ensure consistent tension in all directions, achieving uniform support for the workpiece. Based on the anti-interference principle, the length of the pull bar is less than that of the central shaft to avoid conflict with the axial positioning structure. According to the inner diameter of the thin-walled cylindrical part, the main controller controls the synchronous extension and retraction of each pneumatic adjusting rod 21, driving the fixed block 22 and the pull bar 3 to move radially, adjusting the initial diameter of the open shaping ring 4. After the workpiece is fitted, the pneumatic adjusting rod 21 is finely adjusted to make the open shaping ring 4 fit the inner wall of the workpiece. During processing, the pneumatic adjusting rod 21 remains in position to ensure stable support force. After processing, the pneumatic adjusting rod 21 retracts to release the workpiece. The pneumatic adjusting rod and the fixed block are cleaned regularly, and the positioning accuracy of the adjusting rod and the tensile strength of the pull bar are calibrated regularly.

[0030] Preferably, one end of the open shaping ring 4 is provided with a movable groove for mounting the rolling seat 9, and several chain plates 5 are arranged around the circumference of the central shaft 11. The two ends of the chain plates 5 are respectively provided with connecting grooves and connecting platforms for connection, and the several chain plates 5 are connected to each other by rotation through the connecting grooves and connecting platforms.

[0031] The open-end shaping ring 4 (made of elastic spring steel) has a movable groove for mounting the rolling seat 9. Several chain plates 5 (made of stainless steel) are distributed around the central shaft 11. Each end has a connecting groove and a connecting platform, which are connected to each other by rotation. The open-end shaping ring 4 uses elastic deformation to adjust its diameter and provides a basic support frame for the chain plates 5. The chain plates 5 are connected to each other to form a flexible support ring that fits the inner wall of the thin-walled cylindrical part, achieving uniform support around the circumference. The rotating connection design of the connecting groove and the connecting platform allows the chain plates to adaptively adjust their angle according to the deformation of the open-end shaping ring 4, ensuring continuous support surface. The open-end shaping ring made of elastic material has both support rigidity and deformation capacity, avoiding excessive support that could cause workpiece deformation. The movable groove provides installation and movement space for the rolling seat 9.

[0032] Based on the principle of elastic deformation, the spring steel material of the open-ended shaping ring 4 expands under tension to adapt to the inner diameter of the workpiece. Based on the principle of flexible fit, the rotating connection design of the chain plate 5 allows it to fit cylindrical surfaces with different inner diameters, forming continuous support. Based on the principle of uniform support, the chain plates distributed around the circumference disperse the support force to the inner wall of the workpiece, avoiding localized force concentration. Based on the principle of deformation compensation, the elastic deformation of the open-ended shaping ring can buffer processing vibration and improve processing stability. The rigid support rod 2 pulls the open-ended shaping ring 4 to expand, and the chain plate 5 rotates synchronously with the open-ended shaping ring to form a support ring that matches the inner diameter of the workpiece. After the workpiece is fitted, the chain plate 5 fits against the inner wall of the workpiece, providing full-circumference support. During processing, the chain plate 5 and the open-ended shaping ring 4 work together to buffer vibration and maintain stable support. After processing, the open-ended shaping ring 4 contracts, and the chain plate 5 resets, facilitating workpiece removal. The open-ended shaping ring and chain plate should be cleaned regularly, and the elasticity of the open-ended shaping ring and the rotational flexibility of the chain plate should be checked regularly.

[0033] Preferably, the fixed roller frame 7 is fixedly installed on the surface of the central shaft 11 and located on one side of the pneumatic telescopic rod 12, and one end of the fixed roller frame 7 is provided with a rotating groove for connecting the chain plate roller 6.

[0034] The fixed roller frame 7 (made of cast iron) is fixed to the surface of the central shaft 11, located on one side of the pneumatic telescopic rod 12, and coaxial with the central shaft 11. A rotating groove is opened at one end for connecting the chain roller 6. The fixed roller frame 7 provides stable support for the chain roller 6, ensuring smooth rotation of the chain roller. The cast iron material is rigid and can withstand the tension when the chain strip 5 is wound. The coaxial design with the central shaft 11 ensures that the chain roller 6 rotates synchronously with the central shaft, avoiding chain strip winding deviation. The smooth surface of the rotating groove reduces the rotational wear of the chain roller 6 and extends its service life. The installation position avoids the pneumatic telescopic rod 12 to avoid motion interference.

[0035] Based on the principle of rigid support, the cast iron fixed roller frame ensures that the chain roller 6 does not shift under force, guaranteeing winding accuracy. Based on the principle of coaxial rotation, the coaxial design with the central shaft ensures precise rotation trajectory of the chain roller, preventing chain strip deviation. Based on the principle of low-resistance rotation, the smooth surface of the rotating groove reduces the frictional resistance between the chain roller and the roller frame, improving rotation efficiency. Based on the principle of anti-interference, the reasonable installation position design avoids conflict with other moving parts, ensuring smooth operation of the overall mechanism. During installation, the fixed roller frame 7 is fixed to the preset position of the central shaft 11 with bolts, the coaxiality is calibrated, and the chain roller 6 is embedded into the rotating groove to ensure flexible rotation. The two ends of the chain strip 5 are fixed and wound around the surface of the chain roller 6. During operation, the chain roller 6 rotates with the winding power unit 8 to wind or release the chain strip 5. The rotating groove and the surface of the chain roller are cleaned regularly, and the fixing strength of the fixed roller frame and the wear of the rotating groove are checked regularly.

[0036] Preferably, the winding power unit 8 includes a servo motor 81 that provides driving force and a pulley group 82 that transmits power. The servo motor 81 is fixedly installed inside the central shaft 11, and the output end of the servo motor 81 is fixedly installed with the pulley group 82 that is fixedly installed with the chain roller 6.

[0037] The servo motor 81 of the winding power unit 8 (electrically connected to the main controller) is fixed inside the central shaft 11. The pulley group 82 (made of aluminum alloy) is fixed to the output end of the servo motor 81. The driven wheel is fixedly connected to the chain roller 6. The servo motor 81 provides precise rotational power. Through the reduction and torque increase of the pulley group 82, the chain roller 6 is driven to rotate smoothly. The pulley group 82 realizes power transmission and deceleration, adapting to the winding speed of the chain strip 5. The precise positioning function of the servo motor ensures that the winding length of the chain strip 5 is consistent, ensuring the accurate size of the support ring. The built-in installation design saves space and avoids interference with external components. The power unit and the rigid support rod 2 work together to realize the synchronous adjustment of the chain strip 5, ensuring uniform support.

[0038] Based on the servo drive principle, the closed-loop control of the servo motor 81 achieves precise control of speed and angle, ensuring winding accuracy. Based on the principle of speed reduction and torque increase, the transmission ratio design of the pulley group 82 improves the output torque to meet the force requirements of chain plate winding. Based on the principle of synchronous control, the servo motor and the pneumatic adjustment rod 21 work together to achieve precise adjustment of the support ring diameter. Based on the principle of space optimization, the built-in installation design makes the structure compact and reduces the space occupied. When adjusting the diameter of the open shaping ring 4, the main controller controls the servo motor 81 to start, which drives the chain plate roller 6 to rotate through the pulley group 82, winding or releasing the chain plate 5. According to the adjustment amount of the rigid support rod 2, the rotation angle of the servo motor 81 is synchronously controlled to ensure that the length of the chain plate 5 is adapted to the deformation of the open shaping ring 4. During the processing, the servo motor 81 remains locked to prevent the chain plate 5 from loosening. The servo motor and pulley group are cleaned regularly, and the positioning accuracy of the servo motor and the transmission efficiency of the pulley group are calibrated regularly.

[0039] Preferably, the rolling seat 9 includes a telescopic arc plate 91 made of elastic metal and a connecting seat 92 for fixing. The telescopic arc plate 91 is slidably connected to the inside of the open shaping ring 4. One end of the telescopic arc plate 91 is fixedly installed with the connecting seat 92 located on one side of the open shaping ring 4. The other end of the telescopic arc plate 91 is provided with a limiting block for limiting its movement. The smooth roller 10 is rotatably connected to the inside of the connecting seat 92.

[0040] The telescopic arc plate 91 of the rolling seat 9 (made of elastic spring steel, with an arc adapted to the open shaping ring 4) is slidably connected to the movable groove of the open shaping ring 4. The connecting seat 92 (made of aluminum alloy) is fixed to one end of the telescopic arc plate 91, and a limiting block is provided at the other end of the telescopic arc plate 91. The smooth roller 10 (made of stainless steel) is rotatably connected inside the connecting seat 92. The telescopic arc plate 91 adapts to the deformation of the open shaping ring 4 by using elastic deformation, ensuring that the smooth roller 10 is always in contact with the chain plate 5. The connecting seat 92 provides stable installation support for the smooth roller 10. The smooth roller 10 converts the sliding friction between the chain plate 5 and the rolling seat 9 into rolling friction, reducing the wear of the chain plate. The limiting block prevents the telescopic arc plate 91 from coming out of the movable groove, ensuring structural safety. The rolling guide design prevents the chain plate 5 from shifting when it is wound up, ensuring that the support ring is flat.

[0041] Based on the principle of elastic adaptation, the elastic deformation of the telescopic arc plate 91 causes the smooth roller 10 to deform synchronously with the open shaping ring 4, maintaining a close fit. Based on the principle of friction reduction, rolling friction replaces sliding friction, significantly reducing frictional resistance and wear. Based on the principle of guiding and positioning, the rolling direction of the smooth roller 10 guides the movement trajectory of the chain plate 5, preventing deviation. Based on the principle of anti-detachment protection, the mechanical limit of the limiting block prevents the telescopic arc plate from detaching, ensuring the stability of the mechanism. When the open shaping ring 4 expands or contracts, the telescopic arc plate 91 slides with the movable groove and elastically deforms, causing the smooth roller 10 to fit against the chain plate 5. When the chain plate 5 is wound or released, the smooth roller 10 rotates synchronously, guiding the movement of the chain plate. During processing, the smooth roller 10 remains in contact with the chain plate 5, reducing frictional loss. The telescopic arc plate, connecting seat, and smooth roller are cleaned regularly, and the elasticity of the telescopic arc plate and the rotational flexibility of the smooth roller are checked regularly.

[0042] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0043] In use, the central fixed shaft 1 is first installed on the spindle of the processing equipment, and the coaxiality of the central shaft body 11 is calibrated. According to the inner diameter of the thin-walled cylindrical part to be processed, the main controller controls the pneumatic adjusting rod 21 of the rigid support rod 2 to extend and retract synchronously, driving the fixed block 22 and the pulling strip 3 to move radially, pulling the elastic metal open shaping ring 4 to deform. At the same time, the servo motor 81 of the winding power group 8 starts, driving the chain plate roller 6 to rotate through the pulley group 82, winding or releasing the mutually rotating chain plate 5, so that the chain plate 5 forms a flexible support ring adapted to the inner diameter of the workpiece with the open shaping ring 4. The telescopic arc plate 91 of the rolling seat 9 adapts to the sliding of the open shaping ring, and the internal smooth roller 10 rotates in contact with the chain plate 5, guiding it to flatten. The thin-walled cylindrical part is fitted onto the outside of the central shaft 11. The main controller controls the pneumatic telescopic rod 12 of the central fixed shaft 1 to extend. The L-shaped positioning end plate 13 fits against the end face of the workpiece to complete axial positioning. The pneumatic adjustment rod 21 is finely adjusted to make the chain plate 5 fit tightly against the inner wall of the workpiece and apply support force evenly around the circumference. During the processing, the servo motor 81 locks to maintain the tension of the chain plate 5. The open shaping ring 4 and the chain plate 5 work together to buffer vibration. The positioning end plate 13 prevents the workpiece from moving axially. After processing, the pneumatic telescopic rod 12 retracts, the pneumatic adjustment rod 21 drives the open shaping ring 4 to retract, the chain plate roller 6 releases the chain plate 5, and the workpiece is removed. Throughout the process, all structures work together to achieve uniform force clamping of the thin-walled cylindrical part and reduce the risk of deformation.

[0044] In summary, this processing fixture for uniformly stressed thin-walled cylindrical parts uses a central fixed shaft 1, coaxially distributed with the thin-walled cylindrical part, as the support base to fix a rigid support rod 2. The rigid support rod 2 and the pull bar 3 support the open shaping ring 4. The rigid support ring 2 can be extended and retracted according to the size of the thin-walled cylindrical part to adjust the support size of the open shaping ring 4 by driving the pull bar 3. The open shaping ring 4 causes the chain plate 5 to change length through deformation. The open shaping ring 4 supports the chain plate 5 to form a ring structure that supports the inner wall of the thin-walled cylindrical part. At the same time, the rolling seat 9 and smooth roller 10 set inside the open shaping ring 4 protect and guide the chain plate 5, ensuring the stability of the chain plate 5 adjustment. The size of the chain plate 5 can be adjusted according to the size of the thin-walled cylindrical part to achieve sufficient support and clamping, so that the thin-walled cylindrical part is subjected to uniform force, reducing the degree of deformation during clamping and improving the stability of clamping the thin-walled cylindrical part.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for uniformly applying force to thin-walled cylindrical parts, characterized in that: The system includes a central fixed shaft (1) serving as the main support. Inside the central fixed shaft (1) are several rigid support rods (2) that can be telescopically adjusted. One end of each rigid support rod (2) is fixedly fitted with a connecting pull bar (3). One end of each pull bar (3) is fixedly fitted with several open-ended shaping rings (4) made of elastic metal. The surface of each open-ended shaping ring (4) is provided with several interconnected and clamping chain plates (5). Both ends of each chain plate (5) are wound with chain plate rollers (6) for winding. One end of each chain plate roller (6) is fixedly fitted with a fixed roller frame (7) for supporting it. Inside the fixed roller frame (7) is a winding power unit (8) that provides driving force. The opening of each open-ended shaping ring (4) is provided with a connecting support rolling seat (9). Inside the rolling seat (9) is a rotatably connected smooth roller (10) that guides and protects the chain plate (5). The winding power unit (8) is signal-connected to a PLC main controller for automatic control.

2. The equipment for concentrating mango enzyme fermentation liquid according to claim 1, characterized in that: The central fixed shaft (1) includes a central shaft body (11) for support, a pneumatic telescopic rod (12) for telescopic adjustment, and a positioning end plate (13) for positioning and pressing. The pneumatic telescopic rod (12) is fixedly installed at one end of the central shaft body (11), and the positioning end plate (13) with an L-shaped structure is fixedly installed at one end of the pneumatic telescopic rod (12).

3. The equipment for concentrating mango enzyme fermentation liquid according to claim 2, characterized in that: The rigid support rod (2) includes a pneumatic adjustment rod (21) for telescopic adjustment and a fixed block (22) for support connection. The pneumatic adjustment rod (21) is fixedly installed on the central shaft (11). One end of the pneumatic adjustment rod (21) is fixedly installed on the fixed block (22) located on one side of the central shaft (11). The pull bar (3) is fixedly installed on the end of the fixed block (22) away from the pneumatic adjustment rod (21). The length of the pull bar (3) is less than the length of the central shaft (11).

4. The equipment for concentrating mango enzyme fermentation liquid according to claim 1, characterized in that: One end of the opening shaping ring (4) is provided with an movable groove for mounting the rolling seat (9). Several chain plates (5) are arranged around the circumference of the central shaft (11). The two ends of the chain plates (5) are respectively provided with connecting grooves and connecting platforms for connection. Several chain plates (5) are connected to each other by rotation through the connecting grooves and connecting platforms.

5. The equipment for concentrating mango enzyme fermentation liquid according to claim 1, characterized in that: The fixed roller frame (7) is fixedly installed on the surface of the central shaft (11) and located on one side of the pneumatic telescopic rod (12). One end of the fixed roller frame (7) is provided with a rotating groove for connecting the chain plate roller (6).

6. The equipment for concentrating mango enzyme fermentation liquid according to claim 1, characterized in that: The winding power unit (8) includes a servo motor (81) that provides driving force and a pulley group (82) that transmits power. The servo motor (81) is fixedly installed inside the central shaft (11), and the output end of the servo motor (81) is fixedly installed with the pulley group (82) that is fixedly installed with the chain roller (6).

7. The equipment for concentrating mango enzyme fermentation liquid according to claim 1, characterized in that: The rolling seat (9) includes a telescopic arc plate (91) made of elastic metal and a connecting seat (92) for fixing. The telescopic arc plate (91) is slidably connected to the inside of the open shaping ring (4). One end of the telescopic arc plate (91) is fixedly installed with the connecting seat (92) located on one side of the open shaping ring (4). The other end of the telescopic arc plate (91) is provided with a limiting block for limiting its movement. The smooth roller (10) is rotatably connected to the inside of the connecting seat (92).

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