A wheel hub machining center

Abstract

This invention provides a wheel hub machining center, belonging to the field of wheel hub machining technology. The wheel hub machining center includes a machine tool and a worktable disposed inside the machine tool. It also includes a support assembly disposed on the worktable. The support assembly includes a support frame slidably disposed at the bottom of the worktable. The support frame has a support sleeve that penetrates the worktable and extends into a wheel hub through-hole. A multi-directionally swinging universal ring is provided on the outer side of the support sleeve, and a detection component is disposed on the universal ring. This invention uses the wheel hub through-hole as a positioning reference. The universal ring adaptively conforms to the blank end face at the bottom of the through-hole, and a radially sliding support block synchronously clamps the inner wall of the through-hole. This achieves dual adaptive positioning of the inner side and inner wall of the through-hole in a non-finished state, effectively solving the problems of unstable positioning and low accuracy caused by uneven reference surfaces in existing technologies, and significantly improving positioning reliability and machining consistency.

Description

Technical Field

[0001] This invention belongs to the field of wheel hub processing technology, and specifically relates to a wheel hub processing center. Background Technology

[0002] As a key load-bearing and connecting component of a vehicle, the wheel hub plays a vital role in the overall vehicle's operational safety and stability. Furthermore, for wheel hub machining centers, high-precision positioning and clamping of the wheel hub are fundamental to achieving high-quality machining. Current wheel hub machining processes often use the outer diameter or simple support surfaces for positioning, which is easily affected by factors such as unevenness of the blank end face, interference from the placement surface, and unstable clamping, leading to insufficient positioning accuracy and machining vibration.

[0003] Chinese patent CN120269384B discloses a CNC machining center for wheel hubs, including a drive assembly. The drive assembly includes an arc-shaped extrusion component, and its interior is equipped with a positioning component for adjusting the wheel hub position. After the wheel hub is positioned, the drive component in the arc-shaped extrusion component is activated to extrude two arc-shaped blocks until their inner walls are in tight contact with the outer surface of the wheel hub. Then, six electromagnets corresponding to the wheel hub are electrically connected to an external power source, causing multiple iron plates to move towards the outer surface of their respective electromagnets. This, in turn, moves three chucks towards the outer surface of the wheel hub, further strengthening the fixing effect. After the wheel hub is fixed, it can be driven forward a certain distance to move the next positioning ring to the outer surface of the positioning plate for fixing the next wheel hub.

[0004] However, the above technical solution still has the following problems. When clamping and fixing the wheel hub, it is difficult to establish a stable and reliable positioning reference when the end faces on both sides of the wheel hub through hole are not in a fine-machined state. Especially when the end faces on both sides of the through hole are in a blank state, and there are unevenness, tilt or local shape errors, it is impossible to achieve the synergistic effect of adaptive fitting and rigid fixing, resulting in insufficient positioning accuracy and processing stability. Summary of the Invention

[0005] The purpose of this invention is to provide a wheel hub machining center, which aims to solve the problem in the prior art that it is difficult to establish a stable and reliable positioning reference when the two sides of the through hole are not in a fine-machining state, resulting in low positioning accuracy and poor machining stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wheel hub machining center, comprising: a machine tool and a worktable disposed inside the machine tool, and further comprising: A support assembly is set on the workbench. The support assembly includes a support frame that is slidably set at the bottom of the workbench. The support frame is provided with a support sleeve that penetrates the workbench and can extend into the hub through hole. The outside of the support sleeve is provided with a universal ring that can swing in multiple directions. A detection assembly is provided on the universal ring. A positioning component is provided on the support component. The positioning component includes a positioning sleeve provided inside the support sleeve, a plurality of support blocks that slide radially on the support sleeve, and a guide plate that slides with the support blocks on the positioning sleeve. A pressure limiting component is installed on the support component. The pressure limiting component includes a bonding unit and a pressing unit. The bonding unit includes a bonding sleeve installed inside the positioning sleeve. Multiple bonding blocks are rotatably installed at one end of the bonding sleeve. The pressing unit includes a central shaft that is slidably disposed inside the bonding sleeve. A lower pressing block is rotatably connected to the side of the central shaft near the bonding block. The lower pressing block is disposed above the bonding block and cooperates with the bonding block.

[0007] Its effect is that by setting up a universal ring and a detection component in the support component, it can adaptively fit the blank end face at the bottom of the through hole and detect the contact status in real time, effectively compensating for the positioning error caused by uneven end face and improving the stability of the support.

[0008] A further technical solution of the present invention is that the bottom of the workbench is provided with a first driving device capable of controlling the up and down movement of the support frame. The diameter of the support sleeve is smaller than the diameter of the hub through hole. An arc-shaped protrusion is provided around the outer side of the support sleeve. A universal ring is rotatably connected to the outside of the arc-shaped protrusion. The arc-shaped protrusion protrudes outward and forms a curved support structure. The arc-shaped protrusion and the universal ring rotate and cooperate. A first elastic element is connected to the bottom of the universal ring. The other end of the first elastic element is connected to the support sleeve. The first elastic element is set as a spring.

[0009] A further technical solution of the present invention is that the detection component includes a detection ring disposed at the bottom of the universal joint, and multiple sets of detection probes are uniformly disposed on the detection ring, the detection probes being able to slide up and down along the universal joint.

[0010] A further technical solution of the present invention is that the positioning component includes a positioning plate slidably disposed on a support frame, a second driving device capable of controlling the up and down sliding of the positioning plate is provided at the bottom of the support frame, a positioning sleeve is vertically disposed on the positioning plate, the positioning sleeve passes through the support frame and one end of the positioning sleeve extends above the support sleeve, support blocks are evenly disposed on the top of the support sleeve, and a guide plate is disposed along the axial direction of the positioning sleeve and has a tapered structure in the radial direction, with its side away from the positioning sleeve gradually approaching the positioning sleeve from top to bottom.

[0011] Its effect is that the positioning component drives the support block to slide radially through the tapered structure of the guide plate, thereby achieving synchronous clamping of the inner wall of the through hole, ensuring that the hub through hole remains vertical, and eliminating the interference of the external support surface on positioning.

[0012] A further technical solution of the present invention is that the bonding unit includes a bonding plate slidably disposed on a support frame, a third driving device capable of controlling the up and down sliding of the bonding plate is provided at the bottom of the support frame, a bonding sleeve is vertically disposed on the bonding plate, the bonding sleeve passes through a positioning plate and one end of the bonding sleeve extends above the positioning sleeve, a bonding block is rotatably disposed at the end of the bonding sleeve away from the bonding plate, a rotating shaft is provided at one end of the bonding block, the bonding block can rotate along the fixed axis of the rotating shaft, a second elastic element is connected on the rotating shaft, the other end of the second elastic element is connected to the bonding sleeve, and the second elastic element is configured as a torsion spring.

[0013] A further technical solution of the present invention is that the central shaft passes through the bonding plate and one end extends above the bonding sleeve. A fourth driving device capable of controlling the up and down movement of the central shaft is provided at the bottom of the support frame. One end of the lower pressing block is connected to a third elastic element, and the other end of the third elastic element is connected to the central shaft. The end of the lower pressing block away from the third elastic element can contact the upper surface of the bonding block. The third elastic element is set as a torsion spring, and the elastic force of the third elastic element is greater than that of the second elastic element. Multiple sets of pressing blocks are provided on the central shaft. The pressing blocks are located directly above the rotating shaft, and the bottom of the pressing blocks is provided with a pressing groove that cooperates with the rotating shaft.

[0014] Its effect is that the clamping unit drives the lower pressure block to press the bonding block through the third elastic element, and uses the clamping block and the pressure groove locking shaft to achieve multi-point stable clamping and rigid locking, thereby improving the clamping reliability.

[0015] A further technical solution of the present invention is that the machine tool is provided with a track, the worktable is installed on the upper surface of the track, and a tool holder is slidably arranged inside the machine tool, with the tool holder located above the worktable.

[0016] A further technical solution of the present invention is that multiple sets of auxiliary clamping blocks are slidably arranged on the worktable, and a control unit capable of controlling the reciprocating motion of the auxiliary clamping blocks is provided on the worktable.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses the hub through hole as the positioning reference, and uses a universal ring to adaptively fit the blank end face at the bottom of the through hole, and combines a radially sliding support block to synchronously clamp the inner wall of the through hole, so as to achieve dual adaptive positioning of the inner side and inner wall of the through hole in the non-finished state. This effectively solves the problem of unstable positioning and low accuracy caused by uneven reference surface in the prior art, and improves positioning reliability and processing consistency.

[0018] 2. This invention provides multi-point adaptive support for the blank end face at the top of the through hole by setting multiple sets of rotatable bonding blocks, and uses a clamping unit to lock the rotating shaft of each bonding block, so that it can be stably stressed at different heights and angles. Combined with the support method of the wheel hub being suspended, it avoids interference from the external support surface with the positioning accuracy, thereby improving the workpiece clamping stability and vibration resistance during the processing. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a specific embodiment of the present invention; Figure 3 This is a partial structural diagram of the workbench in a specific embodiment of the present invention; Figure 4 This is a partial front view of the workbench in a specific embodiment of the present invention; Figure 5 for Figure 3 Enlarged structural diagram at point A; Figure 6 This is a cross-sectional view of the universal joint structure in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the installation structure of the support sleeve, positioning sleeve, and universal ring in a specific embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the pressure limiting component in a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the installation structure of the bonding block and the pressing block in a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the initial state of the support component, positioning component, and pressure limiting component in a specific embodiment of the present invention.

[0020] In the diagram: 1. Machine tool; 11. Track; 2. Worktable; 21. First drive device; 3. Support assembly; 31. Support frame; 32. Support sleeve; 321. Arc-shaped protrusion; 33. Universal ring; 331. First elastic element; 332. Detection ring; 333. Detection probe; 4. Positioning assembly; 41. Positioning plate; 42. Second drive device; 43. Positioning sleeve; 431. Guide plate; 44. Support block; 5. Downward pressure limiting assembly; 51. Adhesive plate; 511. Third drive device; 52. Adhesive sleeve; 53. Adhesive block; 531. Rotating shaft; 532. Second elastic element; 54. Central shaft; 541. Fourth drive device; 55. Downward pressure block; 551. Third elastic element; 56. Clamping block; 561. Pressure groove; 6. Tool holder; 7. Auxiliary clamping block. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-10 The present invention provides the following technical solution: a wheel hub machining center, including a machine tool 1, a worktable 2, a support assembly 3, a positioning assembly 4, and a pressing and limiting assembly 5.

[0023] Machine tool 1 is placed horizontally on the ground. Worktable 2 is slidably disposed inside machine tool 1. The hub to be machined is placed on worktable 2, with the hub's through-hole located on the side away from worktable 2. The machining position of the hub is adjusted by moving worktable 2. Support assembly 3 is slidably disposed on worktable 2, with the hub located above support assembly 3. Support assembly 3 can move upward and contact the bottom end face of the hub's central through-hole near worktable 2. Positioning assembly 4 is slidably disposed on support assembly 3. Positioning assembly 4 can move upward and insert into the hub's through-hole, then contact the inner side wall of the through-hole for clamping and positioning. Downward limiting assembly 5 is slidably disposed on support assembly 3. Downward limiting assembly 5 can pass through the through-hole and then press down on the side of the top of the through-hole to limit the hub's position.

[0024] In actual production, the through holes in the wheel hub are usually formed through precision machining, or have a high degree of dimensional consistency and coaxiality accuracy through pre-processing, so that they can be used as positioning references in the wheel hub processing.

[0025] like Figures 1-2As shown, the machine tool 1 has a track 11 inside, and the worktable 2 is mounted on the upper surface of the track 11. The track 11 can drive the worktable 2 to move horizontally. A tool holder 6 is slidably installed inside the machine tool 1. The tool holder 6 is located above the worktable 2. The tool holder 6 is equipped with replaceable machining tools. The tool holder 6 can control the horizontal and vertical movement of the tools, and can perform machining when it is close to the hub.

[0026] It should be noted that the tool holder 6 and the track 11 are common accessories for machining centers, and their specific structures will not be described in detail.

[0027] like Figures 2-7 As shown, the support assembly 3 includes a support frame 31 slidably disposed at the bottom of the workbench 2. A first drive device 21 is disposed at the bottom of the workbench 2, and the output end of the first drive device 21 is connected to the support frame 31. The first drive device 21 can control the support frame 31 to move up and down along the bottom of the workbench 2. A support sleeve 32 is vertically disposed on the upper surface of the support frame 31. The support sleeve 32 passes through the workbench 2 and extends above the workbench 2. The diameter of the support sleeve 32 is smaller than the diameter of the hub through hole. An arc-shaped protrusion 321 is disposed around the outer side of the support sleeve 32. A universal ring 33 is rotatably connected to the outer side of the arc-shaped protrusion 321. The upper surface of the universal ring 33 can contact and support the bottom end face of the hub through hole. The arc-shaped protrusion 321 protrudes outward and forms a curved support structure for rotating with the universal ring 33, so that the universal ring 33 can swing in multiple directions relative to the support sleeve 32, ensuring that the universal ring 33 has the ability to rotate freely relative to the support sleeve 32. A first elastic element 331 is connected to the bottom of the universal joint 33. The other end of the first elastic element 331 is connected to the support sleeve 32. Under the action of the first elastic element 331, the universal joint 33 can remain perpendicular to the axis of the support sleeve 32 in the initial state. In this embodiment, the first elastic element 331 is set as a spring. A detection assembly is provided on the universal joint 33. The detection assembly includes a detection ring 332 set at the bottom of the universal joint 33. Multiple sets of detection probes 333 are evenly arranged on the detection ring 332. The detection probes 333 can slide up and down along the universal joint 33. Initially, the detection probes 333 penetrate the universal joint 33 and extend to the top of the universal joint 33. When the universal joint 33 approaches the hub, the detection probes 333 first contact the hub and are squeezed, and then are gradually pressed into the universal joint 33 until the top of the detection probes 333 is flush with the upper surface of the universal joint 33. Then, the movement of the multiple detection probes 333 is obtained through the detection ring 332.

[0028] During operation, the wheel hub is first placed directly above the support sleeve 32 on the worktable 2. Then, the first drive device 21 controls the support frame 31 to move the support sleeve 32 upwards synchronously. Subsequently, the support sleeve 32 is inserted into the through hole of the wheel hub, and the detection probe 333 contacts the wheel hub and is pressed into the universal ring 33. Because the surface of the blank part before the wheel hub is precision machined is uneven, when the upper surface of the universal ring 33 contacts the bottom plane of the wheel hub through hole, the universal ring 33 begins to rotate along the arc-shaped protrusion 321 to adapt to and fit the bottom surface of the through hole, so as to adapt to the shape change of the bottom surface of the wheel hub through hole. Until the wheel hub is lifted up and disengaged from the upper surface of the worktable 2, at this time, under the action of the wheel hub's gravity, the upper surface of the universal ring 33 is tightly attached to the bottom plane of the through hole. By first lifting the wheel hub to disengage it from the support surface of the worktable 2, the interference of the external support surface on the positioning of the through hole is eliminated.

[0029] like Figures 2-7 As shown, the positioning assembly 4 includes a positioning plate 41 slidably mounted on a support frame 31. A second driving device 42 is provided at the bottom of the support frame 31, and the output end of the second driving device 42 is connected to the positioning plate 41. The second driving device 42 can control the positioning plate 41 to slide up and down along the support frame 31. A positioning sleeve 43 is vertically mounted on the upper surface of the positioning plate 41. The positioning sleeve 43 is located inside the support sleeve 32, penetrates the support frame 31, and one end of the positioning sleeve 43 extends above the support sleeve 32. A support block 44 is slidably disposed on the top of the support sleeve 32. Multiple support blocks 44 are evenly disposed and can slide radially along the support sleeve 32. A guide plate 431 is disposed on the positioning sleeve 43 and slides with the support block 44. The guide plate 431 is disposed axially along the positioning sleeve 43 and has a tapered structure in the radial direction. The side away from the positioning sleeve 43 gradually approaches the positioning sleeve 43 from top to bottom, so that when it cooperates with the support block 44, it can guide the support block 44 to move radially. In the initial state, one side of the support block 44 is in contact with the positioning sleeve 43.

[0030] During operation, when the universal ring 33 contacts the bottom plane of the through hole and lifts it upward, the support block 44 is located inside the through hole. At this time, the second drive device 42 controls the positioning plate 41 to drive the positioning sleeve 43 to move downward synchronously. The guide plate 431 moves downward relative to the support block 44. Due to the sliding fit between the support block 44 and the guide plate 431, the support block 44 begins to slide horizontally and move away from each other under the drive of the guide plate 431 until the side of the support block 44 away from the positioning sleeve 43 contacts the inner wall of the wheel hub through hole. At this time, the support block 44 achieves clamping and fixing of the wheel hub. Initially, the contact point between the hub and worktable 2 may be uneven at the bottom of the hub, causing the through hole to tilt during placement. In this case, the hub's through hole can serve as a positioning reference. The support block 44 is used to position the through hole, ensuring it remains vertical. Simultaneously, the bottom of the hub is suspended, and with the rotation of the universal joint 33, the hub can adjust its angle and position to match the verticality of the through hole during positioning by the support block 44, eliminating the influence of the external support surface on positioning. During the clamping and positioning process of the support block 44, the movement of multiple detection probes 333 can be monitored by the detection ring 332 to determine whether the bottom face of the through hole remains firmly in contact with the universal joint 33, preventing instability in the universal joint 33's support of the hub and subsequent machining deviations.

[0031] like Figures 3-5 and Figures 8-9 As shown, the downward limiting assembly 5 includes a bonding unit and a pressing unit. The bonding unit and pressing unit can press down on one side of the top of the through hole and limit the wheel hub. The bonding unit includes a bonding plate 51 slidably mounted on a support frame 31. A third driving device 511 is provided at the bottom of the support frame 31. The output end of the third driving device 511 is connected to the bonding plate 51, and the third driving device 511 can control the bonding plate 51 to slide up and down along the support frame 31. A bonding sleeve 52 is vertically mounted on the upper surface of the bonding plate 51. The bonding sleeve 52 is located inside the positioning sleeve 43, penetrates the positioning plate 41, and one end extends above the positioning sleeve 43. A bonding block 53 is rotatably disposed at the end of the bonding sleeve 52 away from the bonding plate 51. Multiple sets of bonding blocks 53 are evenly disposed. A rotating shaft 531 is disposed at one end of the bonding block 53. The bonding block 53 can rotate along the rotating shaft 531. A second elastic element 532 is connected to the rotating shaft 531. The other end of the second elastic element 532 is connected to the bonding sleeve 52. In the initial state, the bonding block 53 is tilted and the rotating shaft 531 is located at the upper end of the bonding block 53. The bonding block 53 can swing around the rotating shaft 531. Under the action of the second elastic element 532, the end of the bonding block 53 away from the rotating shaft 531 can rotate away from the bonding sleeve 52. In this embodiment, the second elastic element 532 is set as a torsion spring.

[0032] The clamping unit includes a central shaft 54 ​​slidably disposed inside the fitting sleeve 52. The central shaft 54 ​​passes through the fitting plate 51 and one end extends above the fitting sleeve 52. A fourth driving device 541 is disposed at the bottom of the support frame 31. The output end of the fourth driving device 541 is connected to the central shaft 54, and the fourth driving device 541 can control the central shaft 54 ​​to move up and down along the inside of the fitting sleeve 52. A lower pressing block 55 is rotatably connected to the side of the central shaft 54 ​​near the fitting block 53. The lower pressing block 55 is disposed above the fitting block 53, and multiple sets of lower pressing blocks 55 are provided and cooperate with the fitting block 53. A third elastic element 551 is connected to one end of the lower pressing block 55 that rotates on a fixed axis. The other end of the third elastic element 551 is connected to the central shaft 54, and the end of the lower pressing block 55 away from the third elastic element 551 can contact the upper surface of the fitting block 53.

[0033] In the initial state, under the action of the third elastic element 551, the end of the lower pressing block 55 away from the third elastic element 551 is always in contact with the bonding block 53. At the same time, the end of the lower pressing block 55 away from the third elastic element 551 can rotate towards the central shaft 54. In this embodiment, the third elastic element 551 is set as a torsion spring, and the elastic force of the third elastic element 551 is greater than the elastic force of the second elastic element 532. This allows the bonding block 53 to overcome the elastic force of the second elastic element 532 and rotate the end of the bonding block 53 away from the rotating shaft 531 towards the bonding sleeve 52, so that the lower pressing block 55 and the bonding block 53 can pass through the through hole. Multiple sets of pressing blocks 56 are provided on the central shaft 54. The pressing blocks 56 are located directly above the rotating shaft 531. The bottom of the pressing block 56 is provided with a pressing groove 561 that cooperates with the rotating shaft 531. The rotating shaft 531 can be inserted into the pressing groove 561. When the central shaft 54 ​​moves downward, the clamping block 56 can approach the rotating shaft 531 and make the pressure groove 561 contact it. By increasing the clamping force of the pressure groove 561 on the rotating shaft 531, the bonding block 53 can be restricted from rotating along the bonding sleeve 52. After the clamping block 56 locks the rotating shaft 531, each bonding block 53 forms a rigid support surface.

[0034] During operation, after the wheel hub is clamped and positioned by the positioning component 4, the fitting sleeve 52 and the central shaft 54 ​​are moved upward synchronously, causing the fitting block 53 and the lower pressure block 55 to extend from the upper side of the through hole. Then, the central shaft 54 ​​continues to move upward, causing the lower pressure block 55 to move upward relative to the fitting block 53 until the bottom end of the lower pressure block 55 disengages from the side of the fitting block 53. At this point, the fitting block 53 begins to rotate under the action of the second elastic element 532, and its bottom end gradually moves away from the fitting sleeve 52. Next, the fitting sleeve 52 moves downward, causing the fitting block 53 to gradually approach the upper side of the through hole. Then, the central shaft 54 ​​drives the lower pressure block 55 to move downward and approach the fitting block 53, so that the bottom end of the lower pressure block 55 contacts the side of the fitting block 53 again. Under the action of the third elastic element 551, the end of the fitting block 53 away from the rotating shaft 531 rotates and approaches the fitting sleeve 52 again. Since the fitting sleeve 52 has moved downwards a certain distance, the bottom end of the fitting block 53 contacts the upper side of the through hole during rotation. As the lower pressure block 55 continues to move downwards, the bottom ends of all the fitting blocks 53 are pressed against the upper side of the through hole, adapting them to the uneven upper side of the blank before wheel hub finishing and forming a stable contact. Until the rotating shaft 531 contacts and presses the pressure groove 561, the rotation of the fitting block 53 is restricted by the cooperation of the rotating shaft 531 and the pressure groove 561, pressing the upper side of the through hole and forming a stable clamping limit, ensuring the stability of the wheel hub during processing.

[0035] After the support block 44 contacts the inner wall of the through hole, it forms an axial clamping force transmission path with the downward pressure limiting component 5, thus providing stable constraint to the hub in both the axial and radial directions. At the same time, by controlling the downward movement distance of the fitting sleeve 52, the distance between the upper side of the fitting block 53 and the through hole when in contact can be adjusted, making it adaptable to different through hole diameters or processing requirements of the upper side of the through hole, avoiding interference or unstable clamping.

[0036] like Figures 2-3 As shown, multiple sets of auxiliary clamping blocks 7 are slidably arranged on the worktable 2. The auxiliary clamping blocks 7 can slide horizontally along the upper surface of the worktable 2 and can move individually towards or away from the wheel hub. When the wheel hub is suspended, the auxiliary clamping blocks 7 moving closer to the wheel hub can provide auxiliary support to the bottom surface of the wheel hub, reducing the pressure of the wheel hub on other mechanisms. A control unit (not shown in the figure) is provided on the worktable 2, which can control the reciprocating motion of the auxiliary clamping blocks 7.

[0037] After processing, the fitting sleeve 52 and the central shaft 54 ​​are first controlled to move upward synchronously. Under the action of the third elastic element 551, the pressing block 55 presses down again on the end of the fitting block 53 away from the rotating shaft 531, causing it to rotate towards the fitting sleeve 52, ensuring that the pressing block 55 and the fitting block 53 can pass through the through hole. Then, the positioning sleeve 43 moves upward, and the guide plate 431 moves upward relative to the support block 44. The support blocks 44 move closer to each other and return to their initial state under the drive of the guide plate 431. Then, the auxiliary clamping block 7 is controlled to move away from the hub, and then the support frame 31 is controlled to move downward to place the hub on the worktable 2, and the positioning component 4 and the pressing limit component 5 are completely disengaged from the bottom of the hub through hole. Finally, the hub is removed and prepared for the processing of the next workpiece.

Claims

1. A wheel hub machining center, comprising: The machine tool (1) and the worktable (2) disposed inside the machine tool (1) are characterized in that they further include: Support assembly (3) is set on workbench (2). Support assembly (3) includes support frame (31) slidably set at the bottom of workbench (2). Support frame (31) is provided with support sleeve (32) that penetrates workbench (2) and can extend into hub through hole. Support sleeve (32) is provided with universal ring (33) that can swing in multiple directions on the outside of support sleeve (32). Detection assembly is provided on universal ring (33). The positioning component (4) is provided on the support component (3). The positioning component (4) includes a positioning sleeve (43) provided inside the support sleeve (32). The support sleeve (32) is provided with a plurality of support blocks (44) that slide radially. The positioning sleeve (43) is provided with a guide plate (431) that slides with the support blocks (44). The pressure limiting component (5) is set on the support component (3). The pressure limiting component (5) includes a bonding unit and a pressing unit. The bonding unit includes a bonding sleeve (52) set inside the positioning sleeve (43). Multiple bonding blocks (53) are rotatably set at one end of the bonding sleeve (52). The pressing unit includes a central shaft (54) that is slidably disposed inside the fitting sleeve (52). A lower pressing block (55) is rotatably connected to the side of the central shaft (54) near the fitting block (53). The lower pressing block (55) is disposed above the fitting block (53) and cooperates with the fitting block (53).

2. The wheel hub machining center according to claim 1, characterized in that: The bottom of the workbench (2) is provided with a first driving device (21) that can control the support frame (31) to move up and down. The diameter of the support sleeve (32) is smaller than the diameter of the hub through hole. The outer side of the support sleeve (32) is surrounded by an arc-shaped protrusion (321). The universal ring (33) is rotatably connected to the outside of the arc-shaped protrusion (321). The arc-shaped protrusion (321) protrudes outward and forms a curved support structure. The arc-shaped protrusion (321) and the universal ring (33) rotate and cooperate. The bottom of the universal ring (33) is connected to a first elastic element (331). The other end of the first elastic element (331) is connected to the support sleeve (32). The first elastic element (331) is set as a spring.

3. A wheel hub machining center according to claim 2, characterized in that: The detection component includes a detection ring (332) set at the bottom of the universal ring (33), and multiple sets of detection probes (333) are evenly arranged on the detection ring (332). The detection probes (333) can slide up and down along the universal ring (33).

4. A wheel hub machining center according to claim 1, characterized in that: The positioning component (4) includes a positioning plate (41) slidably mounted on a support frame (31). A second driving device (42) capable of controlling the up-and-down sliding of the positioning plate (41) is provided at the bottom of the support frame (31). A positioning sleeve (43) is vertically mounted on the positioning plate (41). The positioning sleeve (43) passes through the support frame (31) and one end extends to the top of the support sleeve (32). Support blocks (44) are evenly mounted on the top of the support sleeve (32). A guide plate (431) is axially mounted along the positioning sleeve (43) and has a tapered structure in the radial direction. The side away from the positioning sleeve (43) gradually approaches the positioning sleeve (43) from top to bottom.

5. A wheel hub machining center according to claim 1, characterized in that: The bonding unit includes a bonding plate (51) slidably mounted on a support frame (31). A third driving device (511) capable of controlling the up-and-down sliding of the bonding plate (51) is provided at the bottom of the support frame (31). A bonding sleeve (52) is vertically mounted on the bonding plate (51). The bonding sleeve (52) passes through the positioning plate (41) and one end extends above the positioning sleeve (43). A bonding block (53) is rotatably mounted at the end of the bonding sleeve (52) away from the bonding plate (51). A rotating shaft (531) is provided at one end of the bonding block (53). The bonding block (53) can rotate along the fixed axis of the rotating shaft (531). A second elastic element (532) is connected to the rotating shaft (531). The other end of the second elastic element (532) is connected to the bonding sleeve (52). The second elastic element (532) is a torsion spring.

6. A wheel hub machining center according to claim 5, characterized in that: The central shaft (54) passes through the bonding plate (51) and one end extends above the bonding sleeve (52). The bottom of the support frame (31) is provided with a fourth drive device (541) that can control the central shaft (54) to move up and down. One end of the lower pressure block (55) is connected to a third elastic element (551) for fixed-axis rotation. The other end of the third elastic element (551) is connected to the central shaft (54). The end of the lower pressure block (55) away from the third elastic element (551) can contact the upper surface of the bonding block (53). The third elastic element (551) is set as a torsion spring, and the elastic force of the third elastic element (551) is greater than the elastic force of the second elastic element (532). Multiple sets of pressing blocks (56) are provided on the central shaft (54). The pressing blocks (56) are located directly above the rotating shaft (531). The bottom of the pressing blocks (56) is provided with a pressing groove (561) that cooperates with the rotating shaft (531).

7. A wheel hub machining center according to claim 1, characterized in that: The machine tool (1) is equipped with a track (11) inside, and the worktable (2) is installed on the upper surface of the track (11). A tool holder (6) is slidably installed inside the machine tool (1), and the tool holder (6) is located above the worktable (2).

8. A wheel hub machining center according to claim 7, characterized in that: Multiple sets of auxiliary clamping blocks (7) are slidably arranged on the worktable (2), and a control unit that can control the reciprocating motion of the auxiliary clamping blocks (7) is provided on the worktable (2).

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