Dieless hub spinning machine

Abstract

The application discloses a dieless hub spinning machine and relates to the field of hub spinning processing equipment.The dieless hub spinning machine comprises a machine base, a driving main shaft rotatably arranged on the machine base, a clamp coaxially connected with the driving main shaft, a hub clamped on the clamp, two inner cutter wheels symmetrically arranged on two sides of the hub, two outer cutter wheels symmetrically arranged on two sides of the hub, an inner cutter adjusting structure arranged between the inner cutter wheel and the machine base, an outer cutter adjusting structure arranged between the outer cutter wheel and the machine base, and a locking structure arranged between the machine base and the two inner cutter wheels.The dieless hub spinning machine can form a three-point stable support structure on the inner cutter wheel when the inner cutter wheel is inserted into the deep part of the hub for powerful spinning, can convert the original cantilever structure into a stable structure similar to a simply supported beam, can improve the overall rigidity of the inner cutter wheel mounting structure, can effectively absorb vibration in the processing process, can improve locking stability, can inhibit the phenomenon of wobbling cutter, can guarantee the processing precision of the inner wall of the hub, can avoid the occurrence of corrugation on the inner wall of the hub, and can reduce the waste rate.

Description

Technical Field

[0001] This invention relates to the field of wheel hub spinning equipment, specifically a moldless wheel hub spinning machine. Background Technology

[0002] Conventional wheel spinning machines rely on wheel molds to complete the spinning process. For large wheel hubs, the molds are not only bulky but also quite heavy. Moreover, different models and specifications of wheel hubs require specific molds, and the molds are not interchangeable. When a company needs to produce multiple products, it must invest a significant amount of money to purchase various different molds.

[0003] To address the aforementioned issues, the moldless wheel hub spinning machine was developed. It can complete wheel hub spinning without relying on special molds, reducing mold purchase and storage costs, shortening product changeover cycles, improving production efficiency, and reducing safety hazards during mold handling and installation.

[0004] However, the inner cutting wheel of a moldless wheel spinning machine needs to penetrate deep into the wheel hub to complete the spinning operation. To avoid interference between the cutting wheel and the edge of the wheel hub, the inner cutting wheel usually adopts a cantilever structure and is connected to the moving adjustment component on the machine base. When the inner cutting wheel contacts the inner wall of the wheel hub for spinning, the processing contact point of the inner cutting wheel and the connection point of the cantilever and the moving component form a cantilever beam mechanical structure. During the spinning process, the inner cutting wheel needs to apply a large plastic forming force to the wheel hub. When this force is transmitted to the connection point through the cantilever beam structure, it will generate a bending moment due to the lever arm effect. This not only reduces the overall rigidity of the inner cutting wheel mounting structure, but also easily causes vibration and tool chatter. This vibration will be directly reflected on the machined surface of the wheel hub, causing wavy defects on the inner wall of the wheel hub, affecting the surface accuracy and mechanical properties of the product, and ultimately resulting in a high scrap rate. Summary of the Invention

[0005] The purpose of this invention is to provide a moldless wheel hub spinning machine that can perform wheel hub spinning without the need for molds. Through a locking structure, a three-point stable support structure is formed on the inner cutter wheel when it extends deep into the wheel hub for strong spinning. This transforms the original cantilever structure into a stable structure that is approximately a simply supported beam, thereby improving the overall rigidity of the inner cutter wheel mounting structure. It can also effectively absorb vibrations during the processing, improve locking stability, suppress the trembling phenomenon, ensure the processing accuracy of the inner wall of the wheel hub, avoid ripples on the inner wall of the wheel hub, and reduce the scrap rate.

[0006] The above-mentioned optimized structure of the present invention is achieved through the following technical solution: a moldless wheel hub spinning machine, including a machine base;

[0007] A drive spindle is rotatably mounted on the machine base;

[0008] It also includes a clamp, which is coaxially connected to the drive spindle, and a wheel hub is clamped on the clamp;

[0009] Two inner cutter wheels are symmetrically arranged on both sides of the hub.

[0010] Two outer cutting wheels are symmetrically arranged on both sides of the hub.

[0011] An inner cutter adjustment structure is provided between the inner cutter wheel and the machine base;

[0012] An outer blade adjustment structure is provided between the outer blade wheel and the machine base;

[0013] A locking structure is provided between the machine base and the two inner cutter wheels;

[0014] The locking structure includes a lifting cylinder, which is fixedly connected to the base;

[0015] A locking pin is fixedly connected to the output shaft of the lifting cylinder and is coaxially arranged with the wheel hub.

[0016] Two locking elements are symmetrically arranged at the bottom of the locking post, and the side of the locking element away from the locking post is in contact with the tool bar of the inner cutting wheel;

[0017] A position adjustment component is disposed between the locking component and the locking post.

[0018] Preferably, the locking element is a hydraulic damper, and the locking element has a semi-circular groove on the side away from the locking post, and the tool bar of the inner cutting wheel is provided in the semi-circular groove.

[0019] Preferably, the internal blade adjustment structure includes a tailstock, which is located above the hub and connected to the base;

[0020] An inner sliding assembly is provided on the tailstock;

[0021] An inner lifting assembly is provided on the inner horizontal sliding assembly, and the inner cutting wheel is provided at the bottom of the inner lifting assembly;

[0022] An inner rotating assembly is located between the bottom of the inner lifting assembly and the inner cutter wheel.

[0023] Preferably, the inner rotating assembly includes an inner rotating mounting base, which is disposed at the bottom of the inner lifting assembly, and the inner cutter wheel is rotatably disposed within the inner rotating mounting base;

[0024] A rotating component is disposed between the inner rotating mounting base and the inner cutter wheel;

[0025] A driving component, the two ends of which are respectively hinged to the inner rotating mounting base and the rotating component.

[0026] Preferably, the rotating component includes two fixed plates, which are symmetrically arranged on both sides of the top of the inner cutter wheel;

[0027] A drive shaft is rotatably disposed between the two fixed plates and hinged to one end of the drive component.

[0028] An eccentric wheel is rotatably disposed within the inner rotating mounting base, and the eccentric protrusion of the eccentric wheel is hinged to the bottom of the fixing plate.

[0029] Preferably, the driving component is a hydraulic cylinder and is electrically connected to the lifting cylinder.

[0030] Preferably, the external blade adjustment structure includes a column, which is vertically mounted on the machine base;

[0031] An external lifting assembly is mounted on the column;

[0032] An outer lateral movement assembly is provided on the outer lifting assembly, and the outer cutter wheel is provided on the side of the outer lateral movement assembly near the wheel hub.

[0033] Preferably, the outer tool adjustment structure further includes a tool turret, which is disposed on the side of the outer lateral movement assembly near the hub, and the tool turret is provided with a rotatable outer tool wheel;

[0034] A rotating motor is located at the top of the turret, and the output shaft of the rotating motor is connected to the outer cutter wheel.

[0035] Preferably, both the inner lifting assembly and the outer lifting assembly include a vertical guide rail, which is disposed on the inner horizontal sliding assembly or the column;

[0036] A slide block, which is slidably disposed on the vertical guide rail, and the slide block is provided with the outer transverse moving component or the inner cutter wheel;

[0037] A lifting screw, which passes through the slide block and is screwed into the slide block;

[0038] A lifting motor, wherein the output shaft of the lifting motor is fixedly connected to the lifting lead screw.

[0039] Preferably, both the inner sliding assembly and the outer lateral moving assembly include a transverse guide rail, which is disposed on the slide block of the tailstock or the outer lifting assembly.

[0040] A slide table, which is slidably mounted on the transverse guide rail, and the slide table is provided with the inner lifting assembly or the outer cutter wheel;

[0041] A transverse lead screw passes through the slide table and is screwed into the slide table;

[0042] A transverse motor, the output shaft of which is fixedly connected to the transverse lead screw.

[0043] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0044] (1) The present invention uses a clamp to hold the wheel hub and drives the clamp to rotate by driving the main shaft, so that the wheel hub follows the rotation. With the help of two inner cutting wheels and two outer cutting wheels on both sides of the wheel hub, the wheel hub can be spun without the use of a wheel hub mold, thereby reducing production costs, improving production efficiency, enhancing safety in the production process, and solving the problems of high mold cost, difficult and time-consuming mold changing, safety hazards of baking mold, and long production cycle of existing conventional wheel hub spun machines.

[0045] (2) In this invention, the locking column is driven to descend by a lifting cylinder. The locking component can accurately abut against the non-machined surface on the back of the inner cutter wheel shank. Thus, when the inner cutter wheel extends deep into the hub for strong spinning, the inner cutter wheel forms a three-point stable support structure: the clamping point of the inner cutter adjustment structure is the first support point, the contact machining point between the inner cutter wheel and the hub 4 is the second support point, and the contact point between the locking component and the shank is the third support point. This transforms the original cantilever structure into a stable structure that is approximately a simply supported beam, thereby shortening the torque applied to the shank, reducing the bending moment caused by the lever arm effect, improving the overall rigidity of the inner cutter wheel mounting structure, reducing vibration and trembling, and lowering the scrap rate. At the same time, a hydraulic damper is used as the locking component, which can effectively absorb vibration during the machining process, improve locking stability, suppress trembling, and ensure the machining accuracy of the inner wall of the hub. This solves the problem of insufficient rigidity and vibration caused by the longer the cantilever of the shank as the inner cutter wheel extends into the hub, avoids ripples on the inner wall of the hub, and reduces the scrap rate.

[0046] (3) The present invention can achieve speed-sensitive adaptive flexible contact between the inner blade wheel and the hub through a hydraulic damper, thereby realizing the flexible forming of the hub, so that the internal protrusion of the hub can be gradually and smoothly eliminated, avoiding material flow disorder, surface quality deterioration and local wall thickness change caused by rigid contact, improving the dimensional consistency, surface smoothness and overall forming quality of the inner wall of the hub, and further reducing the scrap rate of the moldless spinning process.

[0047] (4) The present invention achieves double pendulum motion of inner tool wheel angle adjustment and rotation center offset by the cooperation of inner rotating mounting base, rotating part and driving part, thereby solving the problem that the inner tool wheel swing angle is limited in the existing fixed axis swing scheme, and the tool bar and the edge of the wheel hub are prone to interference when machining wheel hubs with large rim width or complex shape, and the specific shape cannot be processed, thereby expanding the processing range. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art 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.

[0049] Figure 1 This is a schematic diagram of the structure of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure of the base of the present invention without the outer shell;

[0051] Figure 3 This is a cross-sectional view of the base of the present invention with the outer casing removed;

[0052] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0053] Figure 5 This is a schematic diagram of the connection between the rotating component, the driving component, and the inner cutter wheel of the present invention;

[0054] Figure 6 This is a schematic diagram of the locking mechanism and the inner cutter wheel in the locked state of the present invention.

[0055] In the diagram: 1. Base; 2. Drive spindle; 3. Fixture; 4. Hub; 5. Inner cutter wheel; 6. Outer cutter wheel; 7. Inner cutter adjustment structure; 71. Tailstock; 72. Inner transverse sliding assembly; 721. Transverse guide rail; 722. Slide table; 723. Transverse lead screw; 724. Transverse motor; 73. Inner lifting assembly; 731. Vertical guide rail; 732. Slide block; 733. Lifting lead screw; 734. Lifting motor; 74. Inner rotating mounting base; 75. Rotating component; 751. Fixed plate; 752. Drive shaft; 753. Eccentric wheel; 76. Drive component; 8. Outer cutter adjustment structure; 81. Column; 82. Outer lifting assembly; 83. Outer transverse assembly; 84. Turret; 85. Rotating motor; 9. Locking structure; 91. Lifting cylinder; 92. Locking pin; 93. Locking component; 94. Position adjustment component. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0057] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] refer to Figure 1-6A moldless wheel hub spinning machine includes a base 1, a drive spindle 2, a clamp 3, two inner cutter wheels 5, two outer cutter wheels 6, an inner cutter adjustment structure 7, an outer cutter adjustment structure 8, and a locking structure 9. The base 1 is the basic support structure of the entire equipment, providing an installation platform for other components. The base 1 has a shell to protect the internal structure. The drive spindle 2 is rotatably mounted on the base 1 and can be driven by an external power source such as a motor to achieve rotational motion, providing core power for wheel hub spinning. The clamp 3 is coaxially connected to the drive spindle 2, ensuring that the clamp 3 rotates synchronously with the drive spindle 2. The clamp 3 holds the wheel hub 4, fixing the wheel hub 4 through its clamping action, ensuring the coaxiality accuracy of the wheel hub 4 during processing, and preventing displacement or shaking of the wheel hub 4 during spinning. The clamp 3 can be a multi-jaw chuck, which can be secured to the bottom of the wheel hub 4. The two inner cutter wheels 5 are symmetrically arranged on both sides of the wheel hub 4, allowing for adjustment from the wheel hub... 4. Spin forming is performed on the inner side of the hub 4. Two outer cutter wheels 6 are symmetrically arranged on both sides of the hub 4, and work with the inner cutter wheel 5 to achieve spin forming from the outside of the hub 4, ensuring the uniformity of the wall thickness of the hub 4. The inner cutter adjustment structure 7 is located between the inner cutter wheel 5 and the machine base 1, and can adjust the position and angle of the inner cutter wheel 5 to adapt to the inner side processing requirements of hubs 4 of different specifications. The outer cutter adjustment structure 8 is located between the outer cutter wheel 6 and the machine base 1. The outer cutter adjustment structure 8 can drive the outer cutter wheel 6 to achieve multi-directional position adjustment, and coordinate with the adjustment action of the inner cutter wheel 5 to ensure the accuracy of spin forming. The locking structure 9 is located between the machine base 1 and the two inner cutter wheels 5. The locking structure 9 can accurately lock the inner cutter wheel 5 after it is adjusted to the correct position, preventing the inner cutter wheel 5 from shifting during processing. At the same time, it can solve the problem of insufficient rigidity and vibration caused by the deeper the inner cutter wheel 5 extends into the hub 4 and the longer the tool arm, thus avoiding ripples on the inner wall of the hub 4 and reducing the scrap rate.

[0061] The locking structure 9 includes a lifting cylinder 91, a locking pin 92, two locking parts 93, and a position adjustment part 94. The lifting cylinder 91 is fixedly connected to the base 1 and provides stable support for the locking structure 9. The lifting cylinder 91 can also be replaced by a hydraulic cylinder. The locking pin 92 is fixedly connected to the output shaft of the lifting cylinder 91, is vertically arranged, and is coaxially arranged with the hub 4. The lifting cylinder 91 drives the locking pin 92 to rise and fall axially to realize the switching of the locking action. The two locking parts 93 are symmetrically arranged at the bottom of the locking pin 92, and a wear-resistant liner can be set on the side of the locking part 93 away from the locking pin 92. The wear-resistant liner can adopt a semi-circular structure, and its arc surface is adapted to fit the non-machined surface of the back of the inner cutter wheel 5. A rolling support bearing can be embedded in the wear-resistant liner to reduce friction with the cutter bar and avoid scratching the surface of the cutter bar. The locking part 93 can realize the limit locking of the inner cutter wheel 5 cutter bar. The position adjustment component 94 is located between the locking component 93 and the locking post 92. The position adjustment component 94 can be a linear drive element, such as a small hydraulic cylinder or an electric push rod. Its cylinder body / body is fixed to the bottom of the locking post 92, and its output shaft is fixedly connected to the locking component 93. The position adjustment component 94 can drive the locking component 93 to make fine adjustments to its position, so as to ensure that the locking component 93 can reliably contact the inner tool wheel 5 tool holder.

[0062] When the inner cutter wheel 5 extends deep into the hub 4 for powerful spinning, the lifting cylinder 91 drives the locking pin 92 to descend. At the same time, through the position adjustment component 94, the locking component 93 can accurately abut against the non-machined surface on the back of the inner cutter wheel 5's tool holder. At this time, the inner cutter wheel 5 forms a three-point stable support structure: the clamping point of the inner tool adjustment structure 7 is the first support point, the contact machining point between the inner cutter wheel 5 and the hub 4 is the second support point, and the contact point between the locking component 93 and the tool holder is the third support point. This transforms the original cantilever structure into a stable structure that is approximately a simply supported beam, thereby shortening the torque applied to the tool holder, reducing the bending moment caused by the lever arm effect, improving the overall rigidity of the inner cutter wheel 5 mounting structure, reducing the occurrence of vibration and tool chatter, and reducing the scrap rate.

[0063] Preferably, the locking element 93 can be a hydraulic damper. The hydraulic damper can effectively absorb vibrations during processing, improve locking stability, suppress tool chatter, and ensure the machining accuracy of the inner wall of the wheel hub. The cylinder body of the locking element 93 is fixed to the output shaft of the position adjustment element 94. The piston rod end is provided with a semi-circular groove or wear-resistant liner that matches the contour of the back of the inner cutter wheel 5. The tool bar of the inner cutter wheel 5 is located in the semi-circular groove. Through the close fit between the semi-circular groove and the tool bar, the locking positioning accuracy is improved, and relative sliding of the tool bar is prevented. The semi-circular groove or wear-resistant liner is hinged to the piston rod end, and a torsion spring can be provided between them. This allows for rotation and self-resetting between the semi-circular groove or wear-resistant liner and the piston rod end, thereby increasing the contact area with the inner cutter wheel 5 and ensuring the stability of the force between the locking element 93 and the inner cutter wheel 5.

[0064] During the spinning process, when the inner cutter wheel 5 contacts the conventional area of ​​the inner wall of the hub 4, the hydraulic damper mainly functions as a rigid support and vibration reduction device. When the inner cutter wheel 5 moves to the protruding part of the inner wall of the hub 4, the contact force increases briefly, pushing the cutter bar back slightly and compressing the hydraulic damper. At this time, the piston rod retracts relatively quickly, and the hydraulic damper generates a moderate damping force proportional to the speed. This force is sufficient to maintain the pressure required for machining, while allowing the inner cutter wheel 5 to produce a small displacement buffer to avoid rigid collisions. As the drive spindle 2 rotates continuously, the protruding part continues to contact the inner cutter wheel 5 in subsequent rotations. Due to the flow regulation characteristics of the hydraulic damper, the supporting force it provides tends to be stable, allowing the metal at the protrusion to bear continuous, stable, and directionally controllable pressure over multiple rotation cycles. The metal gradually flows to the surrounding area, and the height of the protrusion slowly decreases until it is flush with the surrounding wall surface.

[0065] This process of contact, buffering, gradual pressure application, and elimination is automatically regulated by the inherent hydrodynamic characteristics of the hydraulic damper, eliminating the need for complex external sensing and control systems. This achieves passive, adaptive precision forming control. It solves the problems encountered during moldless spinning of wheel hubs, where the rigid contact between the inner cutter wheel 5 and the inner wall of the hub 4 causes a sudden surge in reaction force when the cutter wheel reaches a protruding area. This results in the metal at the protrusion being rapidly crushed and flowing unevenly outwards, leading to material accumulation or wrinkles in adjacent areas; orange peel texture, microcracks, or alternating light and dark ripples are easily formed in the protrusion elimination area; and sudden changes in local pressure may cause excessive thinning of the wall thickness at that point, affecting the overall mechanical properties of the hub 4.

[0066] Preferably, the inner blade adjustment structure 7 includes a tailstock 71, an inner horizontal sliding assembly 72, an inner lifting assembly 73, and an inner rotating assembly. The tailstock 71 is located above the hub 4 and is fixedly connected to the base 1 by bolts or other connection methods. It can provide a mounting carrier for components such as the inner horizontal sliding assembly 72, ensuring the stability of the inner blade wheel 5 during adjustment. The inner horizontal sliding assembly 72 is located on the tailstock 71 and can slide laterally along the tailstock 71, thereby driving the subsequent connected components to move laterally. The inner horizontal sliding assembly 72 may include a horizontal guide rail 721, a slide table 722, a horizontal sliding screw 723, and a horizontal moving motor 724. The horizontal guide rail 721 is horizontally mounted on the tailstock 71. The slide table 722 is slidably mounted on the horizontal guide rail 721. The horizontal moving screw 723 passes through the slide table 722 and is screwed into the slide table 722. The output shaft of the horizontal moving motor 724 is fixedly connected to the horizontal moving screw 723, which can be connected by a key. When the transverse motor 724 is started, its output shaft drives the transverse lead screw 723 to rotate. Since the slide table 722 is screwed to the transverse lead screw 723 and is restricted by the transverse guide rail 721 to move only along the guide rail direction, the slide table 722 can slide and adjust on the transverse guide rail 721. This, in turn, drives the inner lifting assembly 73 and other components installed on the slide table 722 to adjust their transverse position to meet the transverse position requirements of the inner cutter wheel 5 when spinning different hubs.

[0067] The inner lifting assembly 73 is mounted on the inner horizontal sliding assembly 72 and can achieve lifting and lowering movements based on the inner horizontal sliding assembly 72. The bottom of the inner lifting assembly 73 is provided with an inner cutter wheel 5. The inner lifting assembly 73 includes a vertical guide rail 731, a slide 732, a lifting screw 733, and a lifting motor 734. The vertical guide rail 731 is mounted on the slide table 722 of the inner horizontal sliding assembly 72. The slide 732 is slidably mounted on the vertical guide rail 731. The lifting screw 733 passes through the slide 732 and is screwed to the slide 732. The output shaft of the lifting motor 734 is fixedly connected to the lifting screw 733 and can be connected by a key. When the lifting motor 734 starts, the output shaft drives the lifting screw 733 to rotate. Under the action of the lifting screw 733, the slide ram 732, due to its screw connection to the lifting screw 733 and its restriction by the vertical guide rail 731, can only slide up and down along the vertical guide rail 731, thereby realizing the lifting and lowering adjustment of the inner cutter wheel 5. The vertical position of the inner cutter wheel 5 can be precisely adjusted according to the height of the hub and the requirements of the spinning process. Through the lateral adjustment of the inner horizontal sliding component 72 and the lifting adjustment of the inner lifting component 73, the position of the inner cutter wheel 5 can be adjusted in both the horizontal and vertical directions, meeting the requirements of different spinning processes for the cutter wheel position.

[0068] Preferably, the inner rotating component is located between the bottom of the inner lifting component 73 and the inner cutting wheel 5, which can realize the angle rotation adjustment of the inner cutting wheel 5, improve the adjustment flexibility of the inner cutting wheel 5, and adapt to complex spinning trajectories.

[0069] Preferably, the driving component 76 can be a hydraulic cylinder. The hydraulic cylinder has the characteristics of large output force, smooth operation and high control precision. It can provide a stable and reliable driving force for the angle adjustment of the inner cutter wheel 5, avoid the deviation of the angle adjustment of the inner cutter wheel 5 due to insufficient driving force or fluctuation, and ensure the quality of spinning.

[0070] Preferably, in order to solve the problem that the swing angle of the inner tool wheel 5 is limited in the existing fixed-axis swing scheme, and that the tool holder is prone to interference with the edge of the wheel hub when machining wheel hubs with large rim width or complex shapes, and that it is impossible to machine specific shapes, the inner rotation component includes an inner rotation mounting base 74, a rotating component 75, and a driving component 76, which can realize the double swing motion of adjusting the angle of the inner tool wheel 5 and offsetting the rotation center, thereby expanding the machining range.

[0071] Specifically, the inner rotating mounting base 74 is located at the bottom of the inner lifting assembly 73. The inner rotating mounting base 74 can adopt a structure of two parallel and opposite mounting plates. The two mounting plates are reserved with installation space for the inner cutter wheel 5 and the rotating component 75, providing stable installation support for the inner cutter wheel 5 and the rotating component 75. The inner cutter wheel 5 is rotatably set between the two mounting plates of the inner rotating mounting base 74, and the shaft swing is realized through the transmission of the rotating component 75. The rotating component 75 is located between the inner rotating mounting base 74 and the inner cutter wheel 5, and can transmit the power of the drive component 76 and drive the inner cutter wheel 5 to realize the double swing motion of angle adjustment and rotation center offset, ensuring the stability of power transmission and the accuracy of motion. The two ends of the drive component 76 are hinged to the inner rotating mounting base 74 and the rotating component 75 respectively, and can provide stable power for the movement of the rotating component 75. The extension and retraction of the drive component 76 drives the rotating component 75 to rotate, thereby driving the inner cutter wheel 5 to complete the double swing motion.

[0072] Preferably, the rotating component 75 includes two fixed plates 751, a drive shaft 752, and an eccentric wheel 753. The two fixed plates 751 are symmetrically arranged on both sides of the top of the inner cutter wheel 5 and can be fixedly connected to the cutter shaft of the inner cutter wheel 5 by bolts, forming a rigid connection between the inner cutter wheel 5 and the rotating component 75, ensuring no relative displacement during power transmission and guaranteeing motion synchronization. The drive shaft 752 is rotatably arranged between the two fixed plates 751 by bearings. The end of the drive shaft 752 can be provided with a hinge lug, which is hinged to one end of the drive component 76, and can receive the power output by the drive component 76 and transmit it to the fixed plate 751. The eccentric wheel 753 is rotatably arranged between the two mounting plates of the inner rotating mounting base 74 by a rotating shaft. The eccentricity of the eccentric wheel 753 can be preset according to the anti-interference requirements of the hub processing. Its eccentric protrusion is provided with a hinge hole, which is hinged to the hinge lug at the bottom of the fixed plate 751 by a pin. When the drive component 76 extends and retracts to drive the drive shaft 752, it will cause the fixed plate 751 to push the eccentric wheel 753 to rotate eccentrically around its own axis. The eccentric rotation of the eccentric wheel 753 will simultaneously give the fixed plate 751 a swing motion and a linear offset motion, which will drive the inner cutter wheel 5 fixed thereto to rotate around the rotation center of the eccentric wheel 753 at the same time, while its own rotation center will generate an offset of a preset trajectory, realizing a double swing motion, effectively avoiding the edge of the wheel hub, avoiding tool bar interference, and can go deep into the dead corner area of ​​the wheel hub that cannot be reached by traditional machining for machining.

[0073] Preferably, the driving member 76 can be an oil cylinder, which has the advantages of large output force, high adjustment accuracy, and stable operation. It can provide a stable and precise driving force for the rotation of the rotating member 75 and the double pendulum movement of the inner cutter wheel 5, avoiding the deviation of the angle adjustment of the inner cutter wheel 5 or the deviation of the rotation center offset trajectory caused by the driving force fluctuation, and ensuring the machining accuracy of the complex-shaped hub. At the same time, the oil cylinder is electrically connected to the lifting cylinder 91 and the locking member 93, enabling the linkage control of the driving member 76, the lifting cylinder 91, and the locking member 93: when the driving member 76 drives the inner cutter wheel 5 for double pendulum adjustment, the locking member 93 and the lifting cylinder 91 unlock synchronously to ensure the free movement of the inner cutter wheel 5; when the inner cutter wheel 5 is adjusted in place, the lifting cylinder 91 and the locking member 93 are automatically activated to lock the inner cutter wheel 5, enhancing the safety and convenience of the operation.

[0074] Preferably, the outer blade adjustment structure 8 includes a column 81, an outer lifting assembly 82, and an outer lateral movement assembly 83. The column 81 is vertically mounted on the machine base 1 and can be fixed with bolts, serving as the mounting support structure for the outer lifting assembly 82 and ensuring the stability of the outer blade wheel 6 during adjustment and operation. The outer lifting assembly 82 is mounted on the column 81 and can move up and down along the column 81. Its structure is similar to that of the inner lifting assembly 73, including a vertical guide rail 731, a slide 732, a lifting screw 733, and a lifting motor 734. The vertical guide rail 731 is mounted on the column 81, the slide 732 is slidably mounted on the vertical guide rail 731, the lifting screw 733 passes through the slide 732 and is screwed into the slide 732, and the output shaft of the lifting motor 734 is fixedly connected to the lifting screw 733. When the lifting motor 734 operates, it drives the lifting screw 733 to rotate. The slide ram 732 slides up and down along the vertical guide rail 731 under the action of the lifting screw 733, thereby achieving the lifting and lowering adjustment of the outer cutter wheel 6. Based on the hub height and spinning process, the vertical position of the outer cutter wheel 6 is precisely controlled. The outer transverse movement assembly 83 is mounted on the slide ram 732 of the outer lifting assembly 82. It can rise and fall synchronously under the drive of the outer lifting assembly 82, and can also slide laterally. The outer transverse movement assembly 83 may include a transverse guide rail 721, a slide table 722, a transverse screw 723, and a transverse motor 724. The transverse guide rail 721 is mounted on the slide ram 732 of the outer lifting assembly 82. The slide table 722 is slidably mounted on the transverse guide rail 721. The transverse screw 723 passes through the slide table 722 and is screwed into it. The output shaft of the transverse motor 724 is fixedly connected to the transverse screw 723. An outer cutting wheel 6 is located on the side of the slide table 722 near the wheel hub 4. When the transverse motor 724 is started, it drives the transverse lead screw 723 to rotate. Under the action of the transverse lead screw 723, the slide table 722 slides along the transverse guide rail 721, thereby realizing the transverse movement adjustment of the outer cutting wheel 6 to meet the requirements of the transverse position of the outer cutting wheel 6 when spinning different wheel hubs. Through the lifting adjustment of the outer lifting assembly 82 and the transverse adjustment of the outer transverse assembly 83, the position of the outer cutting wheel 6 in the vertical and horizontal directions can be adjusted, and it works with the inner cutting wheel 5 to complete the outer contour spinning of the wheel hub 4.

[0075] Preferably, to achieve active rotation of the outer cutter wheel 6 and improve spinning efficiency and processing effect, the outer cutter adjustment structure 8 also includes a turret 84 and a rotary motor 85. The turret 84 is located on the side of the outer transverse component 83 near the hub 4 and can be fixed by bolts or other connection methods. It provides an installation and protection structure for the outer cutter wheel 6. The turret 84 contains a rotatable outer cutter wheel 6, and the outer cutter wheel 6 and the turret 84 can be rotatably connected by bearings. The rotary motor 85 is located on the top of the turret 84, and the output shaft of the rotary motor 85 is connected to the outer cutter wheel 6 by a key. The rotary motor 85 drives the outer cutter wheel 6 to rotate actively, so that when the outer cutter wheel 6 contacts the hub 4, it can reduce frictional resistance by rotating itself, while enhancing the spinning shaping ability and improving the processing accuracy and smoothness of the outer surface of the hub 4.

[0076] The specific working principle is as follows:

[0077] The operator places the wheel hub 4 blank to be processed onto the fixture 3, and activates the fixture 3 to firmly clamp the wheel hub 4, ensuring that the wheel hub 4 is coaxial with the drive spindle 2. Then, the relevant motors in the inner cutter adjustment structure 7 and the outer cutter adjustment structure 8 are activated to adjust the initial position of each cutter wheel. Through the inner horizontal sliding assembly 72 and the inner lifting assembly 73, the inner cutter wheel 5 is adjusted to a suitable initial horizontal and vertical position, maintaining an appropriate distance and angle with the inner surface of the wheel hub 4.

[0078] For hubs 4 with wide or complex rim shapes, to avoid interference between the inner cutter wheel 5 and the edge of the hub 4, the inner rotating assembly activates a double-swing adjustment. The position adjustment component 94 retracts, and the lifting cylinder 91 remains in a retracted state, ensuring that the inner cutter wheel 5 can move freely. The drive component 76 drives the rotating component 75 through a telescopic movement: one end of the cylinder is hinged to the inner rotating mounting base 74, and the other end is hinged to the drive shaft 752 of the rotating component 75. The drive shaft 752 is mounted between two symmetrically arranged fixed plates via bearings, and the fixed plates are rigidly connected to the cutter shaft of the inner cutter wheel 5. When the cylinder telescopically extends or retracts, it pushes the drive shaft 752 to move the fixed plates. The bottom of the fixed plates is hinged to the eccentric protrusion of the eccentric wheel 753 via a pin, and the eccentric wheel 753 is mounted between the two mounting plates of the inner rotating mounting base 74 via a rotating shaft. Therefore, the fixed plates will push the eccentric wheel 753 to rotate eccentrically around its own axis.

[0079] The eccentric rotation of the eccentric wheel 753 simultaneously imparts a combined motion of oscillation and linear offset to the fixed plate, which in turn drives the inner cutter wheel 5, which is fixed to it, to rotate at an angle around the rotation center of the eccentric wheel. At the same time, the rotation center of the inner cutter wheel 5 itself shifts along a preset trajectory, realizing a double pendulum motion. This motion allows the inner cutter wheel 5 to precisely avoid the edge of the hub 4 and penetrate into dead angle areas that traditional machining cannot reach, achieving a precise fit of the final angle and position.

[0080] Simultaneously, the outer lifting assembly 82 and the outer lateral movement assembly 83 adjust the outer cutter wheel 6 to a suitable initial position, maintaining a suitable distance and angle with the outer surface of the hub 4. During the adjustment process, according to the specifications, dimensions, and spinning process requirements of the hub 4, the corresponding parameters can be input through the equipment's control system. The control system will automatically control the operation of each motor to precisely adjust the position of the cutter wheel.

[0081] After both the inner and outer cutter wheels 5 and 6 are adjusted to their positions, the drive unit 76 stops operating and maintains its current state. At the same time, the lifting cylinder 91 is activated, and its output shaft drives the locking pin 92 to descend axially. The position adjustment pieces 94, which are symmetrically arranged at the bottom of the locking pin 92, extend synchronously, so that the end of the locking piece 93 precisely fits against the non-machined surface on the back of the inner cutter wheel 5.

[0082] At this point, the inner cutter wheel 5 forms a three-point stable support structure: the first support point is the connection between the slide 732 of the inner cutter adjustment structure 7 and the inner rotating assembly, providing top support; the second support point is the contact machining point between the inner cutter wheel 5 and the hub 4; and the third support point is the contact point between the locking member 93 and the tool holder. This transforms the original cantilever structure into a stable structure approximately a simply supported beam, improving the rigidity of the tool holder. Simultaneously, the hydraulic damper used in the locking member 93 effectively absorbs high-frequency and low-frequency vibrations during machining, suppressing tool chatter, preventing ripples on the inner wall of the hub 4, and ensuring machining accuracy.

[0083] After the support is locked, the drive spindle 2 drives the fixture 3 and hub 4, which are coaxially connected to it, to rotate synchronously, providing the core power for spinning. During the rotation of hub 4, the inner cutter wheel 5 spins and shapes the workpiece from the inside of hub 4, while the outer cutter wheel 6 assists in spinning from the outside of hub 4. The synergistic effect of the inner and outer cutters ensures the uniformity of hub wall thickness.

[0084] During the spinning process, the inner cutter adjustment structure 7 and the outer cutter adjustment structure 8 can finely adjust the lateral and vertical positions of the inner cutter wheel 5 and the outer cutter wheel 6 according to the processing trajectory requirements; the outer cutter wheel 6 maintains active rotation, and the speed adjustment of the rotating motor 85 is adapted to the needs of different processing stages; the locking component 93 continuously provides stable support and vibration suppression, and the hydraulic damper absorbs processing vibration in real time.

[0085] After the spinning process is completed, the drive spindle 2 stops rotating, the rotation motor 85 of the outer cutter wheel 6 stops working, the position adjustment component 94 retracts synchronously, releasing the lock and support on the inner cutter wheel 5, the lifting cylinder 91 starts to retract, driving the locking column 92 to rise, and the inner cutter adjustment structure 7 and the outer cutter adjustment structure 8 drive the inner cutter wheel 5 and the outer cutter wheel 6 back to their initial positions respectively; finally, the clamp 3 is released and opened, the operator removes the processed hub 4, the equipment completes one processing cycle, returns to the initial state, and waits for the next workpiece clamping.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A moldless wheel hub spinning machine, comprising a machine base (1); A drive spindle (2) is rotatably mounted on the machine base (1); Its features are: It also includes a clamp (3), which is coaxially connected to the drive spindle (2), and a wheel hub (4) is clamped on the clamp (3). Two inner cutter wheels (5) are symmetrically arranged on both sides of the hub (4); Two outer cutter wheels (6) are symmetrically arranged on both sides of the hub (4); An inner blade adjustment structure (7) is provided between the inner blade wheel (5) and the machine base (1); An outer blade adjustment structure (8) is provided between the outer blade wheel (6) and the machine base (1); A locking structure (9) is provided between the machine base and the two inner cutter wheels (5); The locking structure (9) includes a lifting cylinder (91), which is fixedly connected to the base (1); Locking post (92), the locking post (92) is fixedly connected to the output shaft of the lifting cylinder (91) and is coaxially arranged with the hub (4); Two locking elements (93) are symmetrically arranged at the bottom of the locking post (92), and the side of the locking element (93) away from the locking post (92) is in contact with the tool bar of the inner tool wheel (5); Position adjustment member (94) is disposed between the locking member (93) and the locking post (92).

2. The moldless wheel hub spinning machine according to claim 1, characterized in that: The locking member (93) is a hydraulic damper, and a semi-circular groove is provided on the side of the locking member (93) away from the locking post (92), and the tool bar of the inner tool wheel (5) is provided in the semi-circular groove.

3. The moldless wheel hub spinning machine according to claim 2, characterized in that: The inner blade adjustment structure (7) includes a tailstock (71), which is located above the hub (4) and connected to the base (1); An inner sliding assembly (72) is disposed on the tailstock (71); An inner lifting assembly (73) is provided on the inner sliding assembly (72), and the inner lifting assembly (73) is provided with the inner cutter wheel (5) at its bottom. An inner rotating assembly is located between the bottom of the inner lifting assembly (73) and the inner cutter wheel (5).

4. The moldless wheel hub spinning machine according to claim 3, characterized in that: The inner rotating assembly includes an inner rotating mounting base (74), which is located at the bottom of the inner lifting assembly (73), and the inner cutter wheel (5) is rotatably disposed inside the inner rotating mounting base (74). Rotating component (75), the rotating component (75) is disposed between the inner rotating mounting base (74) and the inner cutter wheel (5); The driving component (76) is hinged at both ends to the inner rotating mounting base (74) and the rotating component (75), respectively.

5. A moldless wheel hub spinning machine according to claim 4, characterized in that: The rotating component (75) includes two fixing plates (751), which are symmetrically arranged on both sides of the top of the inner cutter wheel (5). A drive shaft (752) is rotatably disposed between the two fixed plates (751) and hinged to one end of the drive member (76); An eccentric wheel (753) is rotatably disposed within the inner rotating mounting base (74), and the eccentric protrusion of the eccentric wheel (753) is hinged to the bottom of the fixing plate (751).

6. A moldless wheel hub spinning machine according to claim 4, characterized in that: The drive component (76) is a hydraulic cylinder and is electrically connected to the lifting cylinder (91).

7. A moldless wheel hub spinning machine according to claim 3, characterized in that: The external blade adjustment structure (8) includes a column (81), which is vertically mounted on the base (1); An external lifting assembly (82) is mounted on the column (81); An outer transverse component (83) is provided on the outer lifting component (82), and the outer cutter wheel (6) is provided on the side of the outer transverse component (83) near the wheel hub (4).

8. A moldless wheel hub spinning machine according to claim 7, characterized in that: The outer blade adjustment structure (8) also includes a turret (84), which is located on the side of the outer transverse component (83) near the hub (4), and the turret (84) is provided with a rotatable outer blade wheel (6). A rotating motor (85) is located on the top of the turret (84), and the output shaft of the rotating motor (85) is connected to the outer cutter wheel (6).

9. A moldless wheel hub spinning machine according to claim 7, characterized in that: Both the inner lifting assembly (73) and the outer lifting assembly (82) include a vertical guide rail (731), which is provided on the inner horizontal sliding assembly (72) or the column (81); The slide (732) is slidably disposed on the vertical guide rail (731), and the slide (732) is provided with the outer transverse component (83) or the inner cutter wheel (5). A lifting screw (733) passes through the slide (732) and is screwed into the slide (732); A lifting motor (734) is provided, the output shaft of which is fixedly connected to the lifting lead screw (733).

10. A moldless wheel hub spinning machine according to claim 9, characterized in that: The inner lateral sliding assembly (72) and the outer lateral moving assembly (83) both include a transverse guide rail (721), which is provided on the ram (732) of the tailstock (71) or the outer lifting assembly (82). The slide (722) is slidably mounted on the transverse guide rail (721), and the slide (722) is provided with the inner lifting assembly (73) or the outer cutter wheel (6). A transverse lead screw (723) passes through the slide table (722) and is screwed into the slide table (722); A transverse motor (724) is provided, the output shaft of which is fixedly connected to the transverse lead screw (723).

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