A large-bodied, double-wheel active high-power flexible spinning device

Abstract

This invention discloses a large cylindrical active high-power flexible spinning device, comprising a frame unit, a main shaft unit, an outer spinning unit, and an inner spinning unit. The main shaft unit's main shaft turntable can fix the blank to be formed. A second driver drives the main shaft turntable to rotate, thereby realizing and driving the cylindrical blank to rotate. A first driver drives the main shaft turntable to slide axially, and the main shaft platform can drive the main shaft turntable to reciprocate axially, completing axial feed. The third driver of the outer spinning unit can drive the outer spinning wheel to rotate, performing spinning processing on the outside of the cylindrical blank. A fourth driver drives the outer spinning seat to reciprocate on the outer column, with the sliding direction being the radial direction of the main shaft turntable, completing the radial feed of the outer spinning wheel. The fifth driver of the inner spinning unit can drive the inner spinning wheel to rotate, thereby performing spinning processing on the inside of the cylindrical blank. A sixth driver drives the inner spinning seat to reciprocate radially along the inner spinning disc, performing radial feed of the inner spinning wheel during processing.

Description

Technical Field

[0001] This invention relates to the technical field of high-power spinning forming equipment and its peripheral supporting facilities, and in particular to a large-scale cylindrical active high-power flexible spinning equipment. Background Technology

[0002] Large cylindrical bodies, as important supporting and storage structural components, are widely used in important industrial fields such as aerospace, weaponry, petrochemical transportation, and shipbuilding. These parts have stringent requirements for processing technology and manufacturing equipment. High-pressure spinning is currently the most advantageous process for manufacturing large, high-precision, high-quality seamless cylindrical bodies.

[0003] In the traditional mandrel spinning process, the blank is placed on the mandrel during the forming process. After the blank and the mandrel rotate with the spindle, the spinning wheel feeds the blank radially to a given position and then moves along the mandrel axis to gradually squeeze the blank and achieve cylinder forming.

[0004] The double-roller high-pressure spinning process uses an inner spinning wheel instead of a mandrel, allowing simultaneous processing of the inner and outer surfaces of the billet. The positions of the inner and outer spinning wheels can be adjusted according to the billet size to achieve the processing of cylinders of different specifications. The inventors previously proposed a double-roller active high-pressure flexible spinning process, which combines double-roller high-pressure spinning with skew rolling. This new process involves applying a power source to the inner and outer spinning wheels to make them actively rotate and cooperate with the spindle for cylinder processing.

[0005] Currently, existing high-power spinning processes and equipment have certain drawbacks when processing large thin-walled cylinders: (1) After traditional mandrel high-power spinning, the surface properties of the inner and outer surfaces of the cylinder workpiece are inconsistent, and the large-diameter mandrel has high inertia and high cost, so it is not suitable for the processing and manufacturing of large and super-large cylinders. (2) The double-wheel high-power spinning process uses an inner spinning wheel instead of a mandrel, which causes the cylinder to lose the support of the mandrel during the processing, making it prone to instability during the processing, resulting in a limited wall thickness reduction rate during a single high-power spinning. (3) The German company MT designed and manufactured a four-wheel high-power spinning equipment (US4766752, US4951490). During the processing of this equipment, the cylinder workpiece rotates with the center line of the main shaft, and the inner and outer spinning wheels move along the axial and radial directions of the cylinder, respectively. The inner and outer spinning wheels and the spinning wheel frame need to be designed and arranged with corresponding power components and transmission systems, which are complex in structure and require high processing and assembly precision. The synchronous control of the axially moving inner and outer spinning wheels is difficult. In addition, the inner and outer spinning wheels of this equipment use a wedge self-locking mechanism for feeding, and the inner and outer spinning wheels cannot be fed during processing. (4) The inventors have previously proposed a wheel active power spinning equipment (CN110479837B, US11292045B2), in which both the inner and outer spinning wheel structures use cylindrical guides, resulting in poor equipment rigidity. Furthermore, the radial feed of the inner spinning wheel of this equipment is adjusted by a small stepper motor, which cannot feed during processing, resulting in insufficient overall processing flexibility. In addition, the inner spinning wheel of this equipment cannot rotate actively and cannot be matched with the active rotation of the outer spinning wheel. Summary of the Invention

[0006] The purpose of this invention is to provide a large cylindrical active high-power flexible spinning device to solve the problems existing in the prior art and improve the processing accuracy of large thin-walled cylindrical parts.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a large-scale cylindrical active high-power flexible spinning device, comprising:

[0008] A frame unit, comprising a base, an inner column, an outer column, and an inner rotating disk, wherein the inner column and the outer column are both connected to the base, and the distance between the center of the outer column and the center of the base is greater than the distance between the center of the inner column and the center of the base, and the inner rotating disk is connected to the end of the inner column away from the base.

[0009] The spindle unit includes a spindle platform, a spindle turntable, a first driver, a second driver, and a workpiece fixture. The spindle platform is slidably connected to the inner column. The first driver is fixed to the base, and its output is connected to the spindle platform. The spindle turntable is rotatably connected to the spindle platform. The second driver is fixed to the spindle platform, and its output is connected to the spindle turntable. The workpiece fixture is disposed on the spindle turntable and is capable of fixing the blank to be formed.

[0010] An external rotation unit includes an external rotation wheel, an external rotation seat, a third driver, and a fourth driver. The external rotation wheel is rotatably connected to the external rotation seat. The third driver is fixed to the external rotation seat, and its output end is drivenly connected to the external rotation wheel. The external rotation seat is slidably mounted on the outer column. The reciprocating sliding direction of the external rotation seat is perpendicular to the rotation axis of the main spindle turntable, and the extension line of the sliding path of the external rotation seat intersects the axis of the main spindle turntable. The fourth driver is fixed to the outer column, and its output end is drivenly connected to the external rotation seat.

[0011] The inner rotating unit includes an inner rotating wheel, an inner rotating seat, a fifth driver, and a sixth driver. The inner rotating wheel is rotatably connected to the inner rotating seat. The fifth driver is fixed to the inner rotating seat, and its output end is drivenly connected to the inner rotating wheel. The inner rotating wheel corresponds one-to-one with the outer rotating wheel. The inner rotating seat is slidably disposed on the inner rotating disk. The reciprocating sliding direction of the inner rotating seat is perpendicular to the rotation axis of the main spindle, and the extension line of the sliding path of the inner rotating seat intersects the axis of the main spindle. The sixth driver is fixed to the inner rotating disk, and its output end is drivenly connected to the inner rotating seat.

[0012] Preferably, the spindle platform is slidably fitted onto the outside of the inner column, and a sliding bearing is provided between the spindle platform and the inner column; the first driver is connected to a spindle push screw, the spindle push screw is rotatably disposed between the base and the inner rotating disk, the spindle platform is connected to a spindle push nut, and the spindle push screw is threadedly connected to the spindle push nut.

[0013] Preferably, the outer column is provided with a slide rail on the side near the inner column, and the main spindle platform has a slider adapted to the slide rail, the slider being slidably disposed on the slide rail.

[0014] Preferably, the second driver is connected to a drive gear, the main spindle is connected to a transmission gear, the main spindle and the transmission gear are coaxially arranged, and the drive gear meshes with the transmission gear;

[0015] The number of drive gears is multiple sets, and the second driver corresponds one-to-one with the drive gears. The drive gears are evenly distributed circumferentially around the axis of the transmission gear.

[0016] Preferably, the workpiece fixture is connected to the spindle turntable using fixing screws, and the connection position between the workpiece fixture and the spindle turntable is adjustable;

[0017] The number of workpiece fixtures is multiple, and the workpiece fixtures are evenly distributed circumferentially around the axis of the spindle turntable.

[0018] Preferably, the outer column has a U-shaped through groove, the outer rotating seat is slidably disposed in the U-shaped through groove, the inner rotating disk has a U-shaped groove, the inner rotating seat is slidably disposed in the U-shaped groove, and self-lubricating copper plates are provided between the outer rotating seat and the U-shaped through groove and between the inner rotating seat and the U-shaped groove.

[0019] Preferably, the outer rotating wheel is connected to an outer rotating shaft, and the output end of the third driver is connected to the outer rotating shaft via a spline; the fourth driver is connected to a stop, the stop is fixed on the outer column, the output end of the fourth driver is connected to an outer rotating feed screw, the outer rotating seat is connected to an outer rotating feed nut, and the outer rotating feed screw is threadedly connected to the outer rotating feed nut.

[0020] Preferably, the inner rotating wheel is connected to an inner rotating shaft, and the output end of the fifth driver is connected to the inner rotating shaft via a spline; the output end of the sixth driver is connected to an inner rotating feed worm, the end of the inner rotating feed worm away from the sixth driver is rotatably connected to the inner rotating disk, the inner rotating disk is also connected to an inner rotating feed worm wheel, the inner rotating feed worm wheel is rotatably connected to the inner rotating disk, the inner rotating feed worm wheel is connected to an inner rotating feed nut, the inner rotating seat is connected to an inner rotating feed screw, and the inner rotating feed screw is threadedly connected to the inner rotating feed nut.

[0021] Preferably, the frame unit further includes an upper connecting beam and a lower connecting beam. The outer column is connected to the base via the lower connecting beam, and adjacent outer columns are connected via the upper connecting beam. The inner column passes through the inner rotating disc and is fixed with a fastening nut. The frame unit is a cage structure.

[0022] Preferably, the large cylindrical active high-power flexible spinning equipment further includes a balancing unit, which includes a pulley block, a steel cable and a balance block. The pulley block is mounted on the outer column, one end of the steel cable is connected to the main shaft platform, and the other end of the steel cable passes around the pulley block and is connected to the balance block.

[0023] The present invention achieves the following technical effects compared to the prior art:

[0024] The present invention relates to a large-scale cylindrical active high-power flexible spinning device. The main spindle unit's main spindle turntable can fix the blank to be formed. A second driver drives the main spindle turntable to rotate, thereby realizing and driving the cylindrical blank to rotate. A first driver drives the main spindle turntable to slide axially. The main spindle platform can drive the main spindle turntable to reciprocate axially, completing axial feed. The inner column provides guidance for the axial reciprocating movement of the main spindle platform. The third driver of the outer spinning unit can drive the outer spinning wheel to rotate, performing spinning processing on the outside of the cylindrical blank. A fourth driver drives the outer spinning seat on the outer column. The upper reciprocating sliding mechanism slides radially along the spindle turntable, completing the radial feed of the outer spinning wheel. The fifth driver of the inner spinning unit drives the inner spinning wheel to rotate, thereby performing spinning processing on the inside of the cylindrical blank. The sixth driver drives the inner spinning seat to reciprocate radially along the inner spinning disc, performing radial feed of the inner spinning wheel during processing. The outer column of the frame unit provides stable support for the outer spinning unit, while the inner column and inner spinning disc provide the mounting foundation for the spindle unit and the inner spinning unit. Both the inner and outer columns are connected to the base, ensuring the structural stability of the frame unit. This invention's large cylindrical active high-power flexible spinning equipment utilizes the spindle unit to achieve axial feed during processing, avoiding the complex mechanical drive and transmission structures required for the axial movement of the inner and outer spinning components in the prior art. This reduces the difficulty of device processing and assembly, as well as equipment production costs, solves the problem of difficult multi-axis distributed synchronous control, and improves the processing accuracy of the device. At the same time, both the outer and inner spinning wheels can rotate actively, improving the stress consistency of the inner and outer surfaces of the processed cylindrical part, increasing the single-pass thinning rate, and preventing the cylindrical part from becoming unstable during processing. The main spindle unit, outer rotation unit, and inner rotation unit of this invention are driven by separate drivers to achieve feed, which facilitates online adjustment and enables the processing of various parts such as variable wall thickness cylinders and cylinders with circumferential ribs, thereby improving the flexibility of the device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the structure of the large-cylinder active high-power flexible spinning device of the present invention;

[0027] Figure 2 This is a schematic diagram of the frame unit of the large-cylinder active high-power flexible spinning equipment of the present invention;

[0028] Figure 3 This is a schematic diagram of the main shaft unit of the large-cylinder active high-power flexible spinning device of the present invention;

[0029] Figure 4 This is a partial structural schematic diagram of the main shaft unit of the large-cylinder active high-power flexible spinning device of the present invention.

[0030] Figure 5 This is a schematic diagram of the main shaft unit and frame unit of the large-cylinder active high-power flexible spinning device of the present invention;

[0031] Figure 6 This is a schematic diagram of the external spinning unit of the large cylindrical active high-power flexible spinning device of the present invention;

[0032] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure along the AA direction;

[0033] Figure 8 This is a schematic diagram of the internal spinning unit of the large cylindrical active high-power flexible spinning device of the present invention.

[0034] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure along the BB direction;

[0035] Figure 10 for Figure 8 A schematic diagram of the cross-sectional structure along the CC direction;

[0036] Figure 11 This is a schematic diagram of the balancing unit of the large-cylinder active high-power flexible spinning device of the present invention.

[0037] Among them, 100 is a large-scale cylindrical active high-power flexible spinning equipment;

[0038] 1 is the frame unit, 101 is the base, 102 is the inner column, 103 is the outer column, 104 is the inner rotating disc, 105 is the slide rail, 106 is the U-shaped through groove, 107 is the U-shaped groove, 108 is the upper connecting beam, 109 is the lower connecting beam, and 110 is the fastening nut.

[0039] 2 is the main spindle unit, 201 is the main spindle platform, 202 is the main spindle turntable, 203 is the first driver, 204 is the second driver, 205 is the workpiece fixture, 206 is the main spindle push screw, 207 is the main spindle push nut, 208 is the slider, 209 is the drive gear, 210 is the transmission gear, and 211 is the fixing screw.

[0040] 3 is the external rotation unit, 301 is the external rotation wheel, 302 is the external rotation seat, 303 is the third driver, 304 is the fourth driver, 305 is the external rotation shaft, 306 is the stop, 307 is the external rotation feed screw, and 308 is the external rotation feed nut.

[0041] 4 is the internal rotation unit, 401 is the internal rotation wheel, 402 is the internal rotation seat, 403 is the fifth driver, 404 is the sixth driver, 405 is the internal rotation shaft, 406 is the internal rotation feed worm, 407 is the internal rotation feed worm wheel, 408 is the internal rotation feed screw, 409 is the internal rotation feed nut, 410 is the upper cover plate, and 411 is the lower cover plate.

[0042] 5 is the balancing unit, 501 is the pulley block, 502 is the steel cable, and 503 is the balancing block. Detailed Implementation

[0043] 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.

[0044] The purpose of this invention is to provide a large cylindrical active high-power flexible spinning device to solve the problems existing in the prior art and improve the processing accuracy of large thin-walled cylindrical parts.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] This invention provides a large-scale cylindrical active high-power flexible spinning device 100, comprising a frame unit 1, a main shaft unit 2, an outer spinning unit 3, and an inner spinning unit 4. The frame unit 1 includes a base 101, an inner column 102, an outer column 103, and an inner spinning disk 104. Both the inner column 102 and the outer column 103 are connected to the base 101, and the distance between the center of the outer column 103 and the center of the base 101 is greater than the distance between the center of the inner column 102 and the center of the base 101. The inner spinning disk 104 is connected to the end of the inner column 102 furthest from the base 101. The main shaft unit 2 includes a main shaft platform 201, a main shaft turntable 202, a first driver 203, and a second... The spindle platform 201 is slidably connected to the inner column 102. The first driver 203 is fixed on the base 101, and its output end is connected to the spindle platform 201. The spindle turntable 202 is rotatably connected to the spindle platform 201. The second driver 204 is fixed on the spindle platform 201, and its output end is connected to the spindle turntable 202. The workpiece clamp 205 is disposed on the spindle turntable 202 and can fix the blank to be formed. The outer rotation unit 3 includes an outer rotation wheel 301, an outer rotation seat 302, a third driver 303, and a fourth driver. 304. The outer rotating wheel 301 is rotatably connected to the outer rotating seat 302. The third driver 303 is fixed on the outer rotating seat 302, and the output end of the third driver 303 is connected to the outer rotating wheel 301. The outer rotating seat 302 is slidably mounted on the outer column 103. The reciprocating sliding direction of the outer rotating seat 302 is perpendicular to the rotation axis of the main spindle turntable 202, and the extension line of the sliding path of the outer rotating seat 302 intersects the axis of the main spindle turntable 202. The fourth driver 304 is fixed on the outer column 103, and the output end of the fourth driver 304 is connected to the outer rotating seat 302. The inner rotating unit 4 includes an inner rotating wheel 401, an inner rotating seat 402, and a fifth driver. The fifth driver 403 and the sixth driver 404 are connected to the inner rotating wheel 401 rotatably. The fifth driver 403 is fixed on the inner rotating seat 402, and the output end of the fifth driver 403 is connected to the inner rotating wheel 401. The inner rotating wheel 401 corresponds one-to-one with the outer rotating wheel 301. The inner rotating seat 402 is slidably disposed on the inner rotating disk 104. The reciprocating sliding direction of the inner rotating seat 402 is perpendicular to the rotation axis of the main shaft turntable 202, and the extension line of the sliding path of the inner rotating seat 402 intersects the axis of the main shaft turntable 202. The sixth driver 404 is fixed on the inner rotating disk 104, and the output end of the sixth driver 404 is connected to the inner rotating seat 402.

[0047] The large cylindrical active high-power flexible spinning device 100 of the present invention includes a main spindle unit 2 with a main spindle turntable 202 that can fix the blank to be formed. A second driver 204 drives the main spindle turntable 202 to rotate, thereby realizing and driving the cylindrical blank to rotate. A first driver 203 drives the main spindle turntable 202 to slide axially. The main spindle platform 201 can drive the main spindle turntable 202 to reciprocate axially to complete axial feed. The inner column 102 provides guidance for the axial reciprocating movement of the main spindle platform 201. The third driver 303 of the outer spinning unit 3 can drive the outer spinning wheel 301 to rotate, performing spinning processing on the outside of the cylindrical blank. The fourth driver 304 drives the outer spinning seat 302 to rotate on the outer column 103. The upper and lower rotating units slide back and forth, with the sliding direction being the radial direction of the main spindle turntable 202, completing the radial feed of the outer rotating wheel 301; the fifth driver 403 of the inner rotating unit 4 can drive the inner rotating wheel 401 to rotate, thereby performing spinning processing on the inside of the cylindrical blank; the sixth driver 404 drives the inner rotating seat 402 to slide back and forth along the radial direction of the inner rotating disk 104, performing radial feed of the inner rotating wheel 401 during the processing; the outer column 103 of the frame unit 1 provides stable support for the outer rotating unit 3, and the inner column 102 and the inner rotating disk 104 provide the mounting base for the main spindle unit 2 and the inner rotating unit 4. Both the inner column 102 and the outer column 103 are connected to the base 101, ensuring the structural stability of the frame unit 1. The large-scale cylindrical active high-power flexible spinning equipment 100 of this invention utilizes the spindle unit 2 to achieve axial feed during the processing, avoiding the complex mechanical drive and transmission structures required for the axial movement of the inner and outer spinning components in the prior art. This reduces the difficulty of device processing and assembly, as well as equipment production costs, solves the problem of difficult multi-axis distributed synchronous control, and improves the processing accuracy of the device. Simultaneously, both the outer spinning wheel 301 and the inner spinning wheel 401 can rotate actively, improving the stress consistency of the inner and outer surfaces of the processed cylindrical part, increasing the single-pass thinning rate, and preventing instability of the cylindrical body during processing. The spindle unit 2, outer spinning unit 3, and inner spinning unit 4 of this invention utilize separate drivers to achieve feed, facilitating online adjustment and enabling the processing of various parts such as cylindrical bodies with variable wall thickness and cylinders with circumferential ribs, thus improving the flexibility of the device.

[0048] The main spindle platform 201 is slidably mounted on the outside of the inner column 102. A sliding bearing is provided between the main spindle platform 201 and the inner column 102 to ensure smooth reciprocating motion of the main spindle platform 201. In practical applications, to improve structural stability and facilitate the installation of the inner rotating disk 104, multiple inner columns 102 can be provided. The inner columns 102 are evenly distributed circumferentially around the axis of the main spindle platform 201. The first driver 203 is connected to a main spindle push screw 206, which is rotatably mounted between the base 101 and the inner rotating disk 104. The main spindle platform 201 is connected to... A main spindle push nut 207 is connected, and a main spindle push screw 206 is threadedly connected to the main spindle push nut 207. The main spindle push screw 206 and the main spindle push nut 207 form a screw-nut pair. The first driver 203 drives the main spindle push screw 206 to rotate, and then uses the main spindle push nut 207 to drive the main spindle platform 201 to slide back and forth. The inner rotating disk 104 also plays the role of limiting the extreme sliding position of the main spindle platform 201. In order to improve the reciprocating motion accuracy and force uniformity of the main spindle platform 201, multiple sets of main spindle push screws 206 and main spindle push nuts 207 can be set.

[0049] To further improve the sliding accuracy of the spindle platform 201, a slide rail 105 is provided on the side of the outer column 103 near the inner column 102. The spindle platform 201 has a slider 208 that is adapted to the slide rail 105. The slider 208 is slidably mounted on the slide rail 105, which improves the motion stability and reliability of the spindle platform 201.

[0050] Specifically, the second drive 204 is connected to a drive gear 209, and the main spindle turntable 202 is connected to a transmission gear 210, see details. Figure 4 The main spindle turntable 202 and the transmission gear 210 are coaxially arranged. The drive gear 209 meshes with the transmission gear 210. The second driver 204 uses the drive gear 209 to drive the transmission gear 210 to rotate, thereby driving the main spindle turntable 202 to rotate. The main spindle turntable 202 has a ring structure, and the inner column 102 passes through the hollow part of the main spindle turntable 202 to avoid affecting the rotation of the main spindle turntable 202. Correspondingly, the transmission gear 210 has a gear ring structure and is coaxially arranged with the main spindle turntable 202 to drive the cylindrical blank to rotate along its own axis. In this specific embodiment, there are three sets of drive gears 209, with the second driver 204 corresponding to each drive gear 209. The drive gears 209 are evenly distributed circumferentially around the axis of the transmission gear 210, further improving the uniformity of force distribution and the reliability of movement of the main spindle turntable 202.

[0051] It should also be noted that the workpiece fixture 205 is connected to the spindle turntable 202 using fixing screws 211. Please refer to [reference needed]. Figure 3Furthermore, the connection position between the workpiece clamp 205 and the spindle turntable 202 is adjustable. Multiple sets of screw holes matching the fixing screws 211 are provided radially along the spindle turntable 202, facilitating adjustment of the relative position between the workpiece clamp 205 and the spindle turntable 202 to accommodate the fixing of cylindrical blanks of different specifications, thus improving the flexibility and adaptability of the device. To ensure the clamping stability of the cylindrical blank, multiple workpiece clamps 205 are used, evenly distributed circumferentially around the axis of the spindle turntable 202, improving the uniformity of force on the cylindrical blank and ensuring its clamping stability.

[0052] In this specific embodiment, the outer column 103 has a U-shaped through groove 106, and the outer rotating seat 302 is slidably disposed in the U-shaped through groove 106. The inner rotating disk 104 has a U-shaped groove 107, and the inner rotating seat 402 is slidably disposed in the U-shaped groove 107, which ensures the reliability of the movement of the outer rotating seat 302 and the inner rotating seat 402. In practical applications, self-lubricating copper plates are provided between the outer rotating seat 302 and the U-shaped through groove 106 and between the inner rotating seat 402 and the U-shaped groove 107 to form a sliding pair, ensuring the smooth reciprocating sliding of the outer rotating seat 302 and the inner rotating seat 402 and improving the radial feed reliability of the outer rotating wheel 301 and the inner rotating wheel 401.

[0053] More specifically, the outer rotating wheel 301 is connected to the outer rotating shaft 305, and the output end of the third driver 303 is connected to the outer rotating shaft 305 via a spline, see details. Figure 7 This ensures smooth torque transmission. The fourth driver 304 is connected to a stop 306, which is fixed to the outer column 103. The output end of the fourth driver 304 is connected to an external feed screw 307, and the external feed seat 302 is connected to an external feed nut 308. The external feed screw 307 and the external feed nut 308 are threadedly connected, forming a screw-nut pair to ensure smooth transmission of the output torque of the fourth driver 304. The fourth driver 304 can be a servo motor with a reducer. The external feed nut 308 can be embedded in the external feed seat 302 to save space. In practical applications, the third driver 303 can be fixed above the external feed seat 302 using an external motor mounting plate to drive the external wheel 301 to rotate.

[0054] Correspondingly, the inner rotating wheel 401 is connected to the inner rotating shaft 405. The output end of the fifth driver 403 is connected to the inner rotating shaft 405 via a spline, facilitating easy connection and ensuring smooth torque transmission. The output end of the sixth driver 404 is connected to the inner rotating feed worm 406. The end of the inner rotating feed worm 406 away from the sixth driver 404 is rotatably connected to the inner rotating disk 104. The inner rotating disk 104 is also connected to the inner rotating feed worm wheel 407, which is rotatably connected to the inner rotating disk 104. The sixth driver 404 uses the inner rotating feed worm 406 to drive the inner rotating feed worm wheel 407 to rotate. The inner rotating feed worm wheel 407 is connected to the inner rotating feed nut 409 and drives the inner rotating feed nut 409 to rotate. The inner rotating seat 402 is connected to an inner rotating feed screw 408. The inner rotating feed screw 408 and the inner rotating feed nut 409 are threaded together to form a screw-nut pair. The inner rotating feed nut 409 drives the inner rotating feed screw 408 to move, thereby achieving the purpose of reciprocating sliding radial feed of the inner rotating seat 402. The inner rotating feed nut 409 is embedded in the inner ring of the inner rotating feed worm gear 407. The inner rotating feed worm gear 407 and the inner rotating feed nut 409 are integrated parts, saving space in the mechanism and achieving power transmission within a limited space. It should also be noted that the sixth driver 404 can also be a servo motor with a reducer. The reducer and servo motor are fixedly mounted on the inner rotating disk 104 using the upper cover plate 410 and the lower cover plate 411. The fifth driver 403 can be fixed above the inner rotating seat 402 using a motor mounting plate, driving the inner rotating wheel 401 to rotate actively.

[0055] In addition, the frame unit 1 also includes an upper connecting beam 108 and a lower connecting beam 109. The outer column 103 is connected to the base 101 via the lower connecting beam 109, and adjacent outer columns 103 are connected via the upper connecting beam 108, which improves the structural strength of the frame unit 1 and ensures the overall structural stability of the device. The inner column 102 passes through the inner rotating disc 104 and is fixed by the fastening nut 110, which facilitates disassembly and maintenance. The frame unit 1 is a cage structure, which further improves the structural integrity of the frame unit 1 while ensuring the structural strength of the frame unit 1.

[0056] Furthermore, the large-bore active high-power flexible spinning device 100 of the present invention also includes a balancing unit 5, please refer to [reference needed]. Figure 11The balancing unit 5 includes a pulley block 501, a steel cable 502, and a balance block 503. The pulley block 501 is mounted on the outer column 103. One end of the steel cable 502 is connected to the main spindle platform 201 via a lifting ring, and the other end of the steel cable 502 passes around the pulley block 501 and is connected to the balance block 503. This is used to balance the self-weight of the main spindle unit 2, further improving the structural stability and operational reliability of the device, ensuring the overall rigidity of the device, and thus improving the forming accuracy of the cylindrical parts. In practical applications, the number of balance blocks 503 can be adjusted according to the weight of the blank to accommodate the processing of cylindrical parts of various specifications. Correspondingly, the number of balancing units 5 can be consistent with the number of outer columns 103 or set according to actual needs. Multiple sets of balancing units 5 can be evenly distributed around the axis of the main spindle platform 201 to ensure the uniformity of force on the main spindle platform 201.

[0057] The large-scale cylindrical active high-strength flexible spinning equipment 100 of the present invention uses a main shaft unit 2 to replace the axial feed system of the inner and outer spinning wheels in the current high-strength flexible spinning equipment. This avoids the complex mechanical drive and transmission system required for the axial movement of multiple inner and outer spinning wheels, reduces the design, processing and assembly difficulty and equipment cost, avoids the problem of multi-axis distributed synchronous control, and improves the processing accuracy of the equipment. At the same time, the present invention uses an axially fixed method for the outer spinning unit 3 and the inner spinning unit 4. During the processing of cylindrical parts, the axial force on the equipment is balanced by the pre-tightening column of the machine body, which improves the rigidity of the equipment and improves the forming accuracy of the cylindrical body. In addition, the present invention uses a servo motor to drive the inner spinning wheel 401 and the outer spinning wheel 301 for radial feed. The inner spinning wheel 401 and the outer spinning wheel 301 can be adjusted online during the processing, which can realize the processing of various parts such as cylindrical bodies with variable wall thickness and cylindrical bodies with circumferential ribs, and improve the flexibility of the equipment.

[0058] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A large-bodied, double-wheel active high-power flexible spinning device, characterized in that, include: A frame unit, comprising a base, an inner column, an outer column, and an inner rotating disk, wherein the inner column and the outer column are both connected to the base, and the distance between the center of the outer column and the center of the base is greater than the distance between the center of the inner column and the center of the base, and the inner rotating disk is connected to the end of the inner column away from the base. The spindle unit includes a spindle platform, a spindle turntable, a first driver, a second driver, and a workpiece fixture. The spindle platform is slidably connected to the inner column. The first driver is fixed to the base, and its output is connected to the spindle platform. The spindle turntable is rotatably connected to the spindle platform. The second driver is fixed to the spindle platform, and its output is connected to the spindle turntable. The workpiece fixture is disposed on the spindle turntable and is capable of fixing the blank to be formed. An external rotation unit includes an external rotation wheel, an external rotation seat, a third driver, and a fourth driver. The external rotation wheel is rotatably connected to the external rotation seat. The third driver is fixed to the external rotation seat, and its output end is drivenly connected to the external rotation wheel. The external rotation seat is slidably mounted on the outer column. The reciprocating sliding direction of the external rotation seat is perpendicular to the rotation axis of the main spindle turntable, and the extension line of the sliding path of the external rotation seat intersects the axis of the main spindle turntable. The fourth driver is fixed to the outer column, and its output end is drivenly connected to the external rotation seat. The inner rotating unit includes an inner rotating wheel, an inner rotating seat, a fifth driver, and a sixth driver. The inner rotating wheel is rotatably connected to the inner rotating seat. The fifth driver is fixed to the inner rotating seat and its output end is drivenly connected to the inner rotating wheel. The inner rotating wheel corresponds one-to-one with the outer rotating wheel. The inner rotating seat is slidably disposed on the inner rotating disk. The reciprocating sliding direction of the inner rotating seat is perpendicular to the rotation axis of the main shaft turntable, and the extension line of the sliding path of the inner rotating seat intersects the axis of the main shaft turntable. The sixth driver is fixed to the inner rotating disk, and its output end is drivenly connected to the inner rotating seat. The outer column has a U-shaped through groove, and the outer rotating seat is slidably disposed in the U-shaped through groove. The inner rotating disk has a U-shaped groove, and the inner rotating seat is slidably disposed in the U-shaped groove. Self-lubricating copper plates are provided between the outer rotating seat and the U-shaped through groove, and between the inner rotating seat and the U-shaped groove.

2. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The spindle platform is slidably mounted on the outside of the inner column, and a sliding bearing is provided between the spindle platform and the inner column; the first driver is connected to a spindle push screw, which is rotatably disposed between the base and the inner rotating disk; the spindle platform is connected to a spindle push nut, and the spindle push screw is threadedly connected to the spindle push nut.

3. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The outer column is provided with a slide rail on the side near the inner column, and the main spindle platform has a slider adapted to the slide rail, the slider being slidably disposed on the slide rail.

4. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The second driver is connected to a drive gear, and the main spindle is connected to a transmission gear. The main spindle and the transmission gear are coaxially arranged, and the drive gear meshes with the transmission gear. The number of drive gears is multiple sets, and the second driver corresponds one-to-one with the drive gears. The drive gears are evenly distributed circumferentially around the axis of the transmission gear.

5. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The workpiece fixture is connected to the spindle turntable by fixing screws, and the connection position between the workpiece fixture and the spindle turntable can be adjusted. The number of workpiece fixtures is multiple, and the workpiece fixtures are evenly distributed circumferentially around the axis of the spindle turntable.

6. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The outer rotating wheel is connected to an outer rotating shaft, and the output end of the third driver is connected to the outer rotating shaft via a spline; the fourth driver is connected to a stop, the stop is fixed on the outer column, the output end of the fourth driver is connected to an outer rotating feed screw, the outer rotating seat is connected to an outer rotating feed nut, and the outer rotating feed screw is threadedly connected to the outer rotating feed nut.

7. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The inner rotating wheel is connected to an inner rotating shaft, and the output end of the fifth driver is connected to the inner rotating shaft via a spline; the output end of the sixth driver is connected to an inner rotating feed worm, and the end of the inner rotating feed worm away from the sixth driver is rotatably connected to the inner rotating disk; the inner rotating disk is also connected to an inner rotating feed worm wheel, and the inner rotating feed worm wheel is rotatably connected to the inner rotating disk; the inner rotating feed worm wheel is connected to an inner rotating feed nut; the inner rotating seat is connected to an inner rotating feed screw, and the inner rotating feed screw is threadedly connected to the inner rotating feed nut.

8. The large-scale cylindrical active high-power flexible spinning equipment according to claim 1, characterized in that: The frame unit also includes an upper connecting beam and a lower connecting beam. The outer column is connected to the base via the lower connecting beam. Adjacent outer columns are connected via the upper connecting beam. The inner column passes through the inner rotating disc and is fixed with a fastening nut. The frame unit is a cage structure.

9. The large-scale cylindrical active high-power flexible spinning equipment according to any one of claims 1-8, characterized in that: It also includes a balancing unit, which includes a pulley block, a steel cable and a balance block. The pulley block is mounted on the outer column. One end of the steel cable is connected to the main shaft platform, and the other end of the steel cable passes around the pulley block and is connected to the balance block.

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