An automatic production line for wheel hubs

Abstract

The present application belongs to the technical field of hub processing machine tool, and relates to a hub automatic production line, which comprises two double-tool-turret vertical hub processing machine tools used in combination, a turning main shaft and a chuck are arranged in the middle of the first double-tool-turret vertical hub processing machine tool, and a first tool turret and a second tool turret are arranged on the two sides respectively, a plurality of tools for machining the B surface of the hub are assembled on the first tool turret and the second tool turret; a turning main shaft and a chuck are arranged in the middle of the second double-tool-turret vertical hub processing machine tool, a third tool turret and a swing head are arranged on the two sides respectively, a plurality of tools for machining the A surface of the hub are assembled on the third tool turret, a tool magazine for automatically changing tools in cooperation with the swing head is arranged on one side of the swing head, and the tool magazine is provided with tools for machining the A surface of the hub and tools for drilling the hub in reserve. The hub automatic production line provided by the present application has the advantages of small floor area, low purchase cost and maintenance cost, and high processing efficiency and quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hub processing machine tools, and relates to a hub automatic production line. BACKGROUND

[0002] At present, a hub processing production line generally adopts a three-machine line scheme, which is a first-order processing machine tool for processing a hub B surface, a second-order processing machine tool for processing hub ventilation holes, PCD holes and air nozzle holes and a third-order processing machine tool for processing a hub A surface, and the three processing machine tools transfer the workpieces through a robot. The hub processing production line has a large floor area, and has high purchase cost and maintenance cost. SUMMARY

[0003] The present application provides a hub automatic production line, which has the advantages of small floor area, low purchase cost and maintenance cost, high processing efficiency and quality.

[0004] To solve the above technical problems, the purpose of the present application is achieved by the following technical scheme:

[0005] A hub automatic production line comprises two double-tool-turret vertical hub processing machine tools, a first double-tool-turret vertical hub processing machine tool is used for first-order processing of a hub, and a second double-tool-turret vertical hub processing machine tool is used for second-order and third-order processing of the hub, the first-order processing of the hub comprises turning a hub B surface, and the second-order and third-order processing comprises turning a hub A surface and drilling holes in the hub.

[0006] A turning spindle and a chuck are arranged in the middle of the first double-tool-turret vertical hub processing machine tool, and a first tool turret and a second tool turret are arranged on both sides, a plurality of cutters for processing the hub B surface are arranged on the first tool turret and the second tool turret.

[0007] A turning spindle and a chuck are arranged in the middle of the second double-tool-turret vertical hub processing machine tool, and a third tool turret and a head are arranged on both sides, a plurality of cutters for processing the hub A surface are arranged on the third tool turret, a cutter magazine for automatically changing cutters in cooperation with the head is arranged on one side of the head, and the cutter magazine is provided with spare cutters for processing the hub A surface and drilling holes in the hub.

[0008] In the above-mentioned automatic wheel hub production line, the first tool tower, the second tool tower, the third tool tower and the swing head are respectively assembled on the corresponding slide saddle assembly, the slide saddle assembly includes a slide saddle sliding in the transverse direction and a slide plate sliding on the slide saddle in the vertical direction, the first tool tower, the second tool tower and the third tool tower are arranged on the inner side of the corresponding slide plate, and the swing head is arranged on the front side of the corresponding slide plate through a rotating table. Further, the driving device for the slide of the slide saddle is a servo motor, the driving device for the vertical sliding of the slide plate is a servo motor, and the cutter on the swing head is driven to rotate by a drill spindle that can be selectively locked. When the drill spindle is locked, turning operation can also be performed.

[0009] In the above-mentioned automatic wheel hub production line, the double-tool-tower vertical wheel hub machining machine tool cover is provided with a protective cover, the front side of the protective cover is provided with a front automatic door, the two sides are provided with workpiece inlets and outlets, and the workpiece inlets and outlets are provided with automatic side doors. The front automatic door and the automatic side door are in a normally closed state, and are automatically opened or manually controlled to be opened when workpieces are in or out or other requirements exist.

[0010] In the above-mentioned automatic wheel hub production line, the workpiece inlet is provided with a feeding machine, and the workpiece outlet is provided with a discharging machine. The feeding machine includes a feeding machine frame, the feeding machine frame is provided with a feeding conveying frame sliding in the transverse direction, a plurality of conveying rollers for conveying workpieces in the transverse direction are arranged on the feeding conveying frame, and the feeding conveying frame carries the workpieces to slide into the machine tool from the workpiece inlet during feeding. The discharging machine includes a discharging machine frame, the discharging machine frame is provided with a discharging conveying frame sliding in the transverse direction, a plurality of conveying rollers for conveying workpieces in the transverse direction are arranged on the discharging conveying frame, and the discharging conveying frame slides into the machine tool from the workpiece outlet to receive the workpieces during discharging. Further, a sensor for detecting the arrival state of the workpiece is arranged at the workpiece inlet and outlet, and the sensor controls the automatic side door to be automatically opened.

[0011] In the above-mentioned automatic wheel hub production line, the slide plate at the bottom of the first tool tower, the second tool tower and the third tool tower is provided with a workpiece transfer device, the workpiece transfer device slides on the bottom track of the slide plate in the transverse direction, and the workpiece transfer device is an automatic gripper for clamping the workpiece. The tool magazine is provided with an inner support chuck for transferring the workpiece, and the inner support chuck is assembled to the swing head to form the workpiece transfer device.

[0012] In the above-mentioned wheel hub automatic production line, the first double-tool-turret vertical wheel hub machining machine tool and the second double-tool-turret vertical wheel hub machining machine tool are provided with an intermediate conveying line, a plurality of conveying rollers for conveying workpieces in the transverse direction are arranged on the intermediate conveying line, a turnover device is arranged on one side of the intermediate conveying line, a push rod for pushing the workpieces to the turnover device is arranged on the intermediate conveying line, and the push rod is driven by a driving device to move vertically and longitudinally, respectively. Further, the driving device of the push rod is a pneumatic cylinder, and the push rod is driven by a vertical driving pneumatic cylinder to move vertically along the gap of the conveying roller and is driven by a longitudinal driving motor to move longitudinally along the gap of the conveying roller.

[0013] In the above-mentioned wheel hub automatic production line, the turnover device comprises a turnover seat rotatably connected to a turnover frame, the turnover seat is driven by a driving device to turn by 180°, conveying rollers for conveying workpieces in the longitudinal direction are arranged on the upper and lower sides of the turnover seat, a workpiece pressing plate is arranged above the turnover seat, and the workpiece pressing plate is driven by a driving device to move vertically to clamp the workpiece. Further, the driving device of the turnover seat is a motor, the gap of the workpiece pressing plate corresponds to the gap of the conveying roller, the driving device of the workpiece pressing plate is a pneumatic cylinder, and further, the workpiece pressing plate is provided with a plurality of workpiece pressing plates.

[0014] In the above-mentioned wheel hub automatic production line, a guide mechanism is arranged between the turnover device and the intermediate conveying line, the guide mechanism is arranged at the corner of the conveying end, the guide mechanism comprises a guide shaft and a guide wheel rotatably connected to the guide shaft, and the guide mechanism guides the workpieces conveyed by the transverse conveying rollers and the longitudinal conveying rollers to the intermediate conveying line.

[0015] In the above-mentioned wheel hub automatic production line, a first detection device is arranged on the turnover device, a second detection device is arranged at the inlet of the second double-tool-turret vertical wheel hub machining machine tool, conveying rollers for conveying workpieces in the longitudinal direction are arranged on the turnover frame corresponding to the first detection device, the first detection device is provided with a center hole detection mechanism and a workpiece cleaning mechanism, and the second detection device is provided with a photographing recognition mechanism for detecting the angle of the workpiece.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The present application provides a wheel hub automatic production line, which completes one sequence machining, two sequence machining and three sequence machining of the wheel hub through two double-tool-turret vertical wheel hub machining machine tools, reduces the floor area, reduces the purchase cost and maintenance cost, and improves the machining efficiency and quality compared with the traditional three-machine line scheme.

[0018] 2. This invention optimizes the structure and layout of the dual-turret vertical wheel hub machining center. During machining, the workpiece can be processed simultaneously using both turrets or a turret and a tilting head, greatly improving machining efficiency. Through optimized layout, both roughing and finishing of the wheel hub are almost entirely located within the constant torque region of the spindle. Combined with the reinforced turret and milling / turning spindle, this significantly improves both machining efficiency and quality.

[0019] 3. This invention further simplifies the equipment by integrating the loading and unloading mechanism into the machine tool body. It utilizes the space at the bottom of the sliding plate and the tilting head of the machine itself for workpiece transfer, eliminating the need for a separate robot. This further reduces the floor space required, lowers purchase and maintenance costs, and improves processing efficiency and quality. Furthermore, since the workpiece is always handled within the machine tool, it eliminates the safety hazards associated with workpieces falling due to clamping failure.

[0020] 4. The automatic gripper of the present invention can move laterally by sliding on the saddle, and can also move laterally by sliding on the slide plate, thereby providing sufficient lateral displacement space to facilitate the gripping of workpieces.

[0021] 5. This invention further simplifies the equipment by integrating cleaning, flipping, and inspection stations into the logistics path, which can further reduce the floor space, lower purchase and maintenance costs, and improve processing efficiency and quality. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a top view of the present invention;

[0024] Figure 3 This is an internal structural diagram of the first dual-turret vertical wheel hub machining machine tool of the present invention;

[0025] Figure 4 This is an internal structural diagram of the second double-turret vertical wheel hub machining machine tool of the present invention;

[0026] Figure 5 This is a perspective view of the flipping device of the present invention;

[0027] Reference numerals in the attached drawings: 1. Double-turret vertical wheel hub machining center; 2. Turning spindle; 3. First turret; 4. Second turret; 5. Third turret; 6. Sway head; 7. Tool magazine; 8. Saddle; 9. Slide plate; 10. Turntable; 11. Protective cover; 12. Front automatic door; 13. Automatic side door; 14. Loading frame; 15. Loading conveyor frame; 16. Conveying roller; 17. Unloading frame; 18. Unloading conveyor frame; 19. Automatic gripper; 20. Intermediate conveyor line; 21. Tilting frame; 22. Tilting seat; 23. Workpiece pressure plate; 24. Guide mechanism; 25. First detection device; 26. Second detection device. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-5 :

[0029] An automated wheel hub production line includes a first double-turret vertical wheel hub processing machine tool 1, a second double-turret vertical wheel hub processing machine tool 1, an intermediate conveyor line 20 connecting the two double-turret vertical wheel hub processing machine tools 1, a turnover device, a detection device, and a cleaning device. Wherein:

[0030] The first dual-turret vertical wheel hub machining machine tool

[0031] Comparison Appendix Figure 3 The machine tool has a turning spindle 2 and a chuck (not shown in the attached figure) in the middle, and a first turret 3 and a second turret 4 on both sides respectively. The first turret 3 and the second turret 4 are equipped with a number of tools for machining the B side of the wheel hub. The first turret 3 and the second turret 4 are respectively mounted on the corresponding slide saddle 8 assembly. The slide saddle 8 assembly includes a slide saddle 8 that slides laterally driven by a servo motor and a slide plate 9 that slides vertically on the slide saddle 8 driven by a servo motor. The first turret 3 and the second turret 4 are located inside the corresponding slide plate 9 (on the side closer to the turning spindle 2).

[0032] The machine tool enclosure is equipped with a protective cover 11. A front automatic door 12 is located on the front of the protective cover 11, and workpiece inlets and outlets are located on both sides. Automatic side doors 13 are provided at the workpiece inlets and outlets. The front automatic door 12 and automatic side doors 13 are normally closed (the automatic side door 13 in the attached diagram is in the open state). They open automatically or manually when workpieces enter or exit, or when other needs arise.

[0033] A loading machine is provided at the workpiece inlet of the machine tool, and a unloading machine is provided at the workpiece outlet. The loading machine includes a loading frame 14, on which a transversely sliding loading conveyor 15 is provided. The loading conveyor 15 is provided with several transversely conveying rollers 16. During loading, the loading conveyor 15 carries the workpiece and slides into the machine tool from the workpiece inlet. The unloading machine includes an unloading frame 17, on which a transversely sliding unloading conveyor 18 is provided. The unloading conveyor 18 is provided with several transversely conveying rollers 16. During unloading, the unloading conveyor 18 slides into the machine tool from the workpiece outlet to receive the workpiece. Furthermore, sensors are provided at the workpiece inlet and outlet to detect the arrival status of the workpiece. The sensors control the automatic side door 13 to open automatically.

[0034] The bottom of the slide plate 9 corresponding to the first turret 3 and the second turret 4 is provided with a workpiece transfer device. The workpiece transfer device slides laterally on the bottom track of the slide plate 9. The workpiece transfer device is an automatic gripper 19 for clamping the workpiece.

[0035] The second double-turret vertical wheel hub machining machine tool

[0036] Comparison Appendix Figure 4 The machine tool has a turning spindle 2 and a chuck in the middle, and a third turret 5 and a swivel head 6 on both sides. The third turret 5 is equipped with several tools for machining the A surface of the wheel hub. A tool magazine 7 that automatically changes tools in conjunction with the swivel head 6 is provided on one side of the swivel head 6. The tool magazine 7 contains tools for machining the A surface of the wheel hub and tools for drilling the wheel hub. The third turret 5 and the swivel head 6 are respectively mounted on corresponding slide saddle 8 assemblies. The slide saddle 8 assembly includes a slide saddle 8 that slides laterally driven by a servo motor and a slide plate 9 that slides vertically on the slide saddle 8 driven by a servo motor. The third turret 5 is located inside the corresponding slide plate 9. The swivel head 6 is rotatably located in front of the corresponding slide plate 9 via a turntable 10. The tools on the swivel head 6 are driven to rotate by a selectably lockable drilling spindle. When the drilling spindle is locked, turning operations can still be performed.

[0037] The machine tool is equipped with a protective cover 11, the structure of which is the same as that of the first double-turret vertical wheel hub processing machine tool 1.

[0038] A loading machine is provided at the workpiece inlet of the machine tool, and a unloading machine is provided at the workpiece outlet. The structure of the loading machine and the unloading machine is the same as that of the first double-turret vertical wheel hub processing machine tool 1.

[0039] The bottom of the slide plate 9 corresponding to the third turret 5 is provided with a workpiece transfer device. The workpiece transfer device slides laterally on the bottom track of the slide plate 9. The workpiece transfer device is an automatic gripper 19 for clamping the workpiece. The tool magazine 7 is equipped with an inner support chuck for transferring workpieces. The inner support chuck is assembled into the swing head 6 to form a workpiece transfer device.

[0040] intermediate conveyor line

[0041] The intermediate conveyor line 20 is equipped with several conveyor rollers 16 that transport workpieces laterally. A flipping device is provided on one side of the intermediate conveyor line 20. A push rod is provided on the intermediate conveyor line 20 to push the workpieces toward the flipping device. The push rod is driven by a cylinder to move vertically and longitudinally. The movement process is as follows: the push rod is driven by a vertical drive cylinder to move vertically along the gap of the conveyor rollers 16, and the push rod is driven by a longitudinal drive motor to move longitudinally along the gap of the conveyor rollers 16.

[0042] A guiding mechanism 24 is provided between the flipping device and the intermediate conveyor line 20. The guiding mechanism 24 is located at the corner of the conveying end. The guiding mechanism 24 includes a guide shaft and a guide wheel rotatably connected to the guide shaft. The guiding mechanism 24 guides the workpiece, which is simultaneously conveyed by the transverse conveyor roller 16 and the longitudinal conveyor roller 16, onto the intermediate conveyor line 20. The guiding method is as follows: during the process of the workpiece being conveyed from the flipping mechanism to the intermediate conveyor line 20, the workpiece will move towards the corner of the two conveying ends. When the workpiece contacts the guiding mechanism 24, the workpiece will not continue to deviate. As the workpiece continues to be conveyed, it will rotate around the guiding mechanism 24 until it returns to the intermediate conveyor line 20 and is conveyed forward.

[0043] Tilting device

[0044] Comparison Appendix Figure 5 The flipping device includes a flipping seat 22 rotatably connected to the flipping frame 21. The flipping seat 22 is driven by a motor to flip 180°. Both the upper and lower sides of the flipping seat 22 are provided with conveying rollers 16 for conveying workpieces longitudinally. A workpiece pressure plate 23 is provided above the flipping seat 22. The workpiece pressure plate 23 is driven by a cylinder to move vertically to clamp the workpiece. The gap between the workpiece pressure plate 23 and the conveying rollers 16 is correspondingly set. In order to clamp the workpiece more stably, multiple workpiece pressure plates 23 are provided.

[0045] First testing agency

[0046] The first detection mechanism is set on the flipping device. The flipping frame 21 corresponding to the first detection device 25 is provided with a conveying roller 16 for longitudinally conveying the workpiece. The first detection device 25 is provided with a center hole detection mechanism. The first detection device 25 can be set upstream of the flipping seat 22 or downstream of the flipping seat 22. The workpiece cleaning mechanism can also be integrated into the first monitoring device.

[0047] Second testing agency

[0048] The second detection mechanism is located at the inlet of the second double-turret vertical wheel hub processing machine tool 1, and the second detection device 26 is equipped with a photographic recognition mechanism for detecting the angle of the workpiece. Preferably, the second detection mechanism is mounted on the loading machine.

[0049] Comparison Appendix Figure 1 and attached Figure 2 The process flow of this invention is as follows:

[0050] 1. First-order processing

[0051] The workpiece is fed from the feeding device to the first-stage feeding machine, which transports the workpiece to the end of the feeding conveyor 15. The automatic side door 13 opens, and the feeding conveyor 15 carries the workpiece and slides it into the machine tool from the workpiece inlet. The slide saddle 8 corresponding to the first turret 3 moves towards the inlet, and the automatic gripper 19 moves to clamp the workpiece and moves it to the chuck for clamping. Then, it enters the machining process. The first turret 3 and the second turret 4 rotate to select the appropriate tool, and then move to the machining position using the slide saddle 8 and the slide plate 9. The turning spindle 2 drives the workpiece to rotate. The tools on the first turret 3 and the second turret 4 simultaneously process the workpiece. After processing, the tools are changed to process other parts. After all processing is completed, the unloading process begins. The slide saddle 8 corresponding to the second turret 4 moves towards the turning spindle 2. The automatic gripper 19 moves and clamps the workpiece, and moves towards the exit. The unloading conveyor 18 of the first unloading machine slides into the machine tool from the workpiece exit. The automatic gripper 19 places the workpiece on the unloading conveyor 18. The unloading conveyor 18 carries the workpiece out from the exit and enters the intermediate conveyor line 20.

[0052] 2. Flip

[0053] When a workpiece that has completed one processing step moves to the intermediate conveyor line 20, the push rod on the intermediate conveyor line 20 extends and pushes the workpiece into the flipping device. The workpiece moves to the set position of the flipping seat 22 by the conveying roller 16 on the lower side of the flipping seat 22. The workpiece pressure plate 23 moves downward to clamp the workpiece. The flipping seat 22 is driven by the motor to flip 180°, and the workpiece is flipped. Then the workpiece pressure plate 23 retracts, and the workpiece falls into the conveying roller 16 on the upper side of the flipping seat 22 to continue to be conveyed. The conveying roller 16 sends the workpiece into the first detection device 25. After cleaning, the center hole is detected. Workpieces that fail the detection are removed from the production line, and workpieces that pass the detection are reversed and conveyed back to the intermediate conveyor line 20.

[0054] 3. Second-order and third-order processing

[0055] After being flipped, the workpiece is conveyed along the middle conveyor line 20 into the second and third-stage loading machines. The first and third-stage loading machines transport the workpiece to the end of the loading conveyor frame 15 for positioning. Then, the angle is identified by taking pictures. After the detection is completed, the automatic side door 13 opens, and the loading conveyor frame 15 carries the workpiece and slides into the machine tool from the workpiece inlet. The slide saddle 8 corresponding to the third tool turret 5 moves towards the inlet, and the automatic gripper 19 moves to clamp the workpiece and moves it to the chuck for clamping. Then, it enters the machining process. The swivel head 6 changes to the drilling tool in the tool magazine 7 and rotates to the set angle. Then, it moves to the machining position using the slide saddle 8 and the slide plate 9. According to the detected angle, the workpiece is adjusted to the set position, and then the hole is machined. After the machining is completed, the tool is changed, the angle and position are adjusted, and the other holes are machined. After all the machining is completed, it enters the third-stage machining process. The third turret 5 rotates to select a suitable tool, and the swivel head 6 selects a suitable tool from the tool magazine 7 and locks the drilling spindle. Then, it moves to the machining position using the slide saddle 8 and slide plate 9. The turning spindle 2 drives the workpiece to rotate, and the tools on the third turret 5 and swivel head 6 simultaneously machine the workpiece. After machining, the tool is changed to machine other parts. After all machining is completed, the unloading process begins. The swivel head 6 changes to the inner support chuck, and the slide saddle 8 corresponding to the swivel head 6 moves towards the turning spindle 2. After the swivel head 6 moves, it moves the inner support chuck to the center hole to clamp the workpiece and moves towards the exit. The unloading conveyor 18 of the second and third unloading machines slides into the machine tool from the workpiece exit. The inner support chuck places the workpiece on the unloading conveyor 18, and the unloading conveyor 18 carries the workpiece out of the exit and into the unloading device.

[0056] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automated production line for wheel hubs, characterized in that, It includes two dual-turret vertical wheel hub processing machine tools (1) used together. The first dual-turret vertical wheel hub processing machine tool (1) is used for the first-order processing of the wheel hub, and the second dual-turret vertical wheel hub processing machine tool (1) is used for the second-order and third-order processing of the wheel hub. The first-order processing of the wheel hub includes the B-side of the wheel hub, and the second-order and third-order processing includes the A-side of the wheel hub and wheel hub drilling. The first double-turret vertical wheel hub machining machine (1) is provided with a turning spindle (2) and a chuck in the middle, and a first turret (3) and a second turret (4) are provided on both sides respectively. Several cutting tools for machining the B side of the wheel hub are mounted on the first turret (3) and the second turret (4). The second double-turret vertical wheel hub machining machine (1) is provided with a turning spindle (2) and a chuck in the middle, and a third turret (5) and a swivel head (6) are provided on both sides respectively. The third turret (5) is equipped with several tools for machining the A surface of the wheel hub. A tool magazine (7) that automatically changes tools in conjunction with the swivel head (6) is provided on one side of the swivel head (6). The tool magazine (7) is equipped with tools for machining the A surface of the wheel hub and tools for drilling holes in the wheel hub. The first turret (3), the second turret (4), the third turret (5) and the swivel head (6) are respectively mounted on the corresponding slide saddle assembly. The slide saddle assembly includes a slide saddle (8) that slides laterally and a slide plate (9) that slides vertically on the slide saddle (8). The first turret (3), the second turret (4) and the third turret (5) are located inside the corresponding slide plate (9). The swivel head (6) is rotatably located on the front side of the corresponding slide plate (9) via a turntable (10). The bottom of the slide plate (9) corresponding to the first turret (3), the second turret (4), and the third turret (5) is provided with a workpiece transfer device. The workpiece transfer device slides laterally on the bottom track of the slide plate (9). The workpiece transfer device is an automatic gripper (19) for clamping the workpiece. The tool magazine (7) is equipped with an inner support chuck for transferring workpieces. The inner support chuck is assembled into the swing head (6) to form a workpiece transfer device.

2. The automated wheel hub production line according to claim 1, characterized in that, The double-turret vertical wheel hub processing machine tool (1) is equipped with a protective cover (11). The front of the protective cover (11) is provided with a front automatic door (12), and the workpiece inlet and outlet are provided on both sides. The workpiece inlet and outlet are provided with automatic side doors (13).

3. The automated wheel hub production line according to claim 2, characterized in that, A loading machine is provided at the workpiece inlet and a unloading machine is provided at the workpiece outlet. The loading machine includes a loading machine frame (14), on which a transversely sliding loading conveyor frame (15) is provided. The loading conveyor frame (15) is provided with several conveying rollers (16) that convey workpieces transversely. During loading, the loading conveyor frame (15) carries the workpiece and slides from the workpiece inlet into the machine tool. The unloading machine includes a unloading machine frame (17), on which a transversely sliding unloading conveyor frame (18) is provided. The unloading conveyor frame (18) is provided with several conveying rollers (16) that convey workpieces transversely. During unloading, the unloading conveyor frame (18) slides from the workpiece outlet into the machine tool to receive the workpiece.

4. The automated wheel hub production line according to claim 3, characterized in that, An intermediate conveyor line (20) is provided between the first double-turret vertical wheel hub processing machine tool (1) and the second double-turret vertical wheel hub processing machine tool (1). The intermediate conveyor line (20) is provided with several conveying rollers (16) that convey workpieces in the transverse direction. A flipping device is provided on one side of the intermediate conveyor line (20). A push rod that pushes the workpiece towards the flipping device is provided on the intermediate conveyor line (20). The push rod is driven by a driving device to move in the vertical and longitudinal directions respectively.

5. The automated wheel hub production line according to claim 4, characterized in that, The flipping device includes a flipping seat (22) rotatably connected to the flipping frame (21). The flipping seat (22) is driven by a drive device to flip 180°. The upper and lower sides of the flipping seat (22) are provided with conveying rollers (16) for conveying workpieces longitudinally. A workpiece pressure plate (23) is provided above the flipping seat (22). The workpiece pressure plate (23) is driven by a drive device to move vertically to clamp the workpiece.

6. An automated wheel hub production line according to claim 4, characterized in that, A guide mechanism (24) is provided between the flipping device and the intermediate conveyor line (20). The guide mechanism (24) is located at the corner of the end of the conveyor. The guide mechanism (24) includes a guide shaft and a guide wheel rotatably connected to the guide shaft. The guide mechanism (24) guides the workpiece that is simultaneously conveyed by the transverse conveyor roller and the longitudinal conveyor roller to the intermediate conveyor line (20).

7. An automated wheel hub production line according to claim 4, characterized in that, The flipping device is equipped with a first detection device (25), and the second double-turret vertical wheel hub processing machine tool (1) is equipped with a second detection device (26) at its inlet. The flipping frame (21) corresponding to the first detection device (25) is equipped with a longitudinal conveying roller (16) for conveying workpieces. The first detection device (25) is equipped with a center hole detection mechanism and a workpiece cleaning mechanism. The second detection device (26) is equipped with a photo recognition mechanism for detecting the angle of the workpiece.

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