A special turning device for fully automatic finishing of passenger car wheel hub

Abstract

The present invention discloses a special turning device for full-automatic fine turning of a passenger car wheel hub, and specifically relates to the technical field of wheel hub processing. The present invention sets a wheel hub clamping assembly, and two adjusting plates support the bottom of the wheel hub. Then two adjusting plates in a lower clamping unit move toward the center, so that the adjusting plates contact the lower end of the wheel hub, and then the wheel hub is effectively fixed to ensure the stability of fine turning. After fine turning of one side of the wheel hub with the spoke is completed, two adjusting plates in an upper clamping unit move toward the center and contact the upper end of the wheel hub. The upper end of the wheel hub is fixed by a pair of adjusting plates, and the turning rotation degree of the wheel hub is driven by the wheel hub clamping assembly to maintain its turning stability, thereby eliminating the steps of taking the wheel hub out of the fixture and turning it, and directly turning it after fixing it is adopted to improve the turning efficiency. After the turning is completed, the adjusting plates in the lower clamping unit are in an open state, which is convenient for the subsequent fine turning of the other side of the wheel hub.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub processing, in particular to a special turning device for full-automatic finishing of a passenger car wheel hub. Background Art

[0002] Wheel hub finishing is an important part of the wheel hub manufacturing process. It is usually located after rough machining. Through further fine machining of the wheel hub, higher dimensional accuracy and surface quality can be achieved. The implementation of the finishing process requires the use of special machine tools and tools. In the finishing of passenger car wheel hubs, they need to be turned over to facilitate multi-faceted finishing, improve the surface quality of the wheel hub, and thus enhance the aesthetics and corrosion resistance of the wheel hub.

[0003] After searching, the invention patent with publication number CN108581665A discloses a polishing device for an aluminum alloy wheel hub, which can realize double-sided grinding of the aluminum alloy wheel hub, and can change the angle of the grinding component according to the concave-convex shape of the aluminum alloy wheel hub surface, so as to realize precise grinding of the aluminum alloy wheel hub.

[0004] In the above scheme, the wheel hub needs to be taken out from the rotating mechanism and loaded into the flipping mechanism. The principle of this flipping method is to take out, load, flip and put back the raw materials, which increases the processing steps of fine turning and increases the time of fine turning. In addition, after the wheel hub is flipped, it is still a fixed processing surface, and the inner and outer ring surfaces cannot be fine turned. Summary of the invention

[0005] The object of the present invention is to provide a dedicated turning device for fully automatic finishing of a passenger car wheel hub, so as to solve the problem mentioned in the above background technology that the finishing process steps are increased, resulting in an increase in finishing process time.

[0006] The present invention can be implemented through the following technical scheme: a passenger car wheel hub full-automatic fine turning special turning device, comprising a rotating disk embedded in the upper surface of the fine turning table, the upper surface of the rotating disk is fixedly mounted with two supporting vertical plates, a hub clamping assembly driven by a turning motor is rotatably mounted between the inner wall surfaces of the two supporting vertical plates, the hub clamping assembly comprises an upper clamping unit and a lower clamping unit, the upper clamping unit comprises two hollow structure movable plates, one of the movable plates is installed with a bidirectional lead screw, two opposite threads on the outside of the bidirectional lead screw are sleeved with a sliding seat, a side surface of the movable plate is provided with a transverse sliding groove communicating with its inner cavity, an end face of the sliding seat is slidably fitted with the inner cavity of the movable plate and the transverse sliding groove, and the other end face of the sliding seat is fixedly connected with an adjustment plate 1, the adjustment plate 1 is fitted and fixed with one end of the wheel hub;

[0007] The lower clamping unit includes two fixed plates, the fixed plates have the same structure as the movable plates, and two adjustment plates are slidably provided on both side ends of the two fixed plates, and the two adjustment plates are fitted and fixed to the other end of the wheel hub.

[0008] A further technical improvement of the present invention is that a slider is provided at the other end of the adjusting plate, and the slider slides in the other movable plate.

[0009] A further technical improvement of the present invention lies in that an arc groove is provided on the upper surface of the adjustment plate one and a lower surface of the adjustment plate two, the arc groove has the same arc length as the wheel hub, an inner fitting portion is provided on the bottom side of the adjustment plate one, an outer fitting portion is provided above the inner fitting portion, the outer fitting portion is connected with the inner fitting portion and the arc groove, and the inner wall surfaces of the outer fitting portion and the inner fitting portion are provided with convex heads that contact the end surface of the wheel hub.

[0010] A further technical improvement of the present invention is that a flip plate is rotatably installed on the inner wall surface of the supporting vertical plate, the fixed plate is fixedly arranged on the flip plate, the top surface of the flip plate is provided with a vertical slide groove for the vertical sliding of the movable plate, and the upper surface of the fixed plate is installed with an electric push rod for pushing the movable plate to move.

[0011] A further technical improvement of the present invention is that a stand is installed above the wheel hub clamping assembly, a linear guide is installed on the top surface of the stand, a limit seat is slidably installed on the linear guide, and a segmented grinding assembly driven by a hydraulic cylinder is arranged below the limit seat.

[0012] A further technical improvement of the present invention is that the segmented grinding assembly includes a connecting plate, a reciprocating cylinder is installed on the bottom surface of the connecting plate, a mounting plate is installed on the driving end of the reciprocating cylinder, and a grinding wheel driven by a grinding motor is installed on the lower surface of the reciprocating cylinder for lifting and lowering, and the grinding wheel is used for grinding the wheel hub spokes.

[0013] A further technical improvement of the present invention is that a bidirectional slide is installed on the other side of the lower surface of the mounting plate, and a grinding inner roller and a grinding outer roller driven by two grinding motors are respectively installed on the two slides of the bidirectional slide, and the grinding inner roller and the grinding outer roller are respectively used for rotational grinding of the inner wall and outer wall of the wheel hub.

[0014] A further technical improvement of the present invention is that a dust collecting groove is provided in the middle of the upper surface of the rotating disk, a driving gear is installed on the outer wall surface of one of the supporting vertical plates, and racks are meshed and transmitted above and below the driving gear, and the racks slide in the limit position on the corresponding supporting vertical plates, and a connecting rod is fixedly connected to the end of the rack, and a limiting pin is provided at the end of each connecting rod, and a rotating plate is rotatably connected to the bottom side of the supporting vertical plate, and guide grooves for limiting the sliding of the corresponding limiting pins are provided on the end surfaces of the two rotating plates.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting a hub clamping assembly, the bottom of the hub is supported by two adjusting plates 2, and then the two adjusting plates 2 in the lower clamping unit move toward the center, so that the adjusting plate 2 contacts the lower end of the hub, thereby effectively fixing the hub to ensure the stability of the fine turning process. When the fine turning of the spoke side of the hub is completed, the two adjusting plates 1 in the upper clamping unit move toward the center and contact the upper end of the hub, and the upper end of the hub is fixed by a pair of adjusting plates. The hub is driven to flip and rotate by the hub clamping assembly to maintain its flipping stability, eliminating the steps of taking the hub out of the fixture and flipping it. The operation of flipping directly after fixing is adopted to improve the flipping efficiency. After the flipping is completed, the adjusting plate 2 in the lower clamping unit is in an open state, which is convenient for the subsequent fine turning process on the other side of the hub.

[0017] 2. By setting up a segmented grinding assembly, the reciprocating cylinder pushes the mounting plate to slide on the bottom surface of the connecting plate, so that the inner grinding roller and the outer grinding roller are away from the inner and outer wall surfaces of the wheel hub, and the spoke surface of the wheel hub is ground; the flip plate drives the wheel hub to flip and rotate, at this time the side of the wheel hub with the spoke faces downward, and the reciprocating cylinder pushes the mounting plate to slide on the upper limit of the connecting plate, at this time the inner grinding roller and the outer grinding roller are located just above the inner and outer walls of the wheel hub, and then the segmented grinding assembly is pushed downward by the hydraulic cylinder, and the inner grinding roller and the outer grinding roller are close to each other and respectively roll in contact with the inner and outer walls of the wheel hub, and the rotation direction of the inner grinding roller and the outer grinding roller is opposite to that of the rotating disk, so as to evenly remove the unevenness on the surface of the wheel hub, and the grinding wheel therein continues to contact downward with the reverse side of the spoke, so as to adapt to the grinding of different surfaces of the wheel hub and improve the processing efficiency;

[0018] 3. The two rotating plates rotate and fit with the supporting vertical plates and are in a vertical state to intercept the flying dust. The dust is concentrated in the dust collecting trough. When cleaning is needed, the driving gear rotates to drive the upper and lower racks to slide to the corresponding side. The racks push the connecting rod, and the limit pin at the end of the connecting rod slides in the guide groove. At this time, the rotating plate is in an open state, which is easy to clean the dust collecting trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the segmented grinding assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the flip assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the top cross-sectional structure of the movable plate and the adjusting plate 1 of the present invention;

[0024] Figure 5 It is a schematic diagram of the structural connection between the movable plate and the fixed plate of the present invention;

[0025] Figure 6 It is a schematic diagram of the structural connection between the flip plate and the supporting vertical plate of the present invention.

[0026] In the figure: 1. precision turning table; 2. rotating disk; 3. supporting vertical plate; 4. flip plate; 5. dust collecting trough; 6. vertical frame; 7. linear guide; 8. limit seat; 9. segmented grinding assembly; 10. connecting plate; 11. reciprocating cylinder; 12. mounting plate; 13. grinding wheel; 14. two-way slide; 16. grinding inner roller; 17. grinding outer roller; 18. flip plate; 19. movable plate; 20. adjusting plate one; 21. arc groove; 22. outer fitting part; 23. inner fitting part; 24. fixed plate; 25. adjusting plate two; 26. electric push rod; 27. vertical slide groove; 28. horizontal slide groove; 29. ​​two-way screw; 30. slide seat; 31. slider; 32. driving gear; 33. rack; 34. connecting rod; 35. limit pin; 36. guide groove. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0028] See also Figure 1-Figure 6As shown, the present invention provides a special turning device for full-automatic fine turning of a passenger car wheel hub, comprising a fine turning table 1, a rotating disk 2 is embedded in the upper surface of the fine turning table 1, two supporting upright plates 3 are fixedly installed on the upper surface of the rotating disk 2, a wheel hub clamping assembly driven by a turning motor is rotatably installed between the inner wall surfaces of the two supporting upright plates 3, the wheel hub clamping assembly comprises an upper clamping unit and a lower clamping unit, the upper clamping unit comprises two hollow structured movable plates 19, a bidirectional lead screw 29 is installed in one of the movable plates 19, and the outer surface of the bidirectional lead screw 29 Slide seats 30 are sleeved on two opposite threads, and a transverse slide groove 28 communicating with the inner cavity of the movable plate 19 is provided on the side surface of the movable plate 19. When the bidirectional lead screw 29 rotates, the two slide seats 30 are driven to move in opposite directions at the same time. The end surface of the slide seat 30 slides and fits with the inner cavity of the movable plate 19 and the transverse slide groove 28 to ensure the stability of the slide seat 30 when sliding in the inner cavity of the movable plate 19, and prevent the slide seat 30 from rotating with the bidirectional lead screw 29. The other end surface of the slide seat 30 is fixedly connected to an adjustment plate 20, and the adjustment plate 20 is fixedly fitted with one end of the wheel hub.

[0029] The lower clamping unit includes two fixed plates 24 , which have the same structure as the movable plate 19 , and two adjustment plates 25 are slidably provided on both side ends of the two fixed plates 24 , and the adjustment plate 25 is fitted and fixed to the other end of the wheel hub.

[0030] First, the upper clamping unit and the lower clamping unit are both in an open state, wherein the adjustment plate 1 20 in the upper clamping unit is located at the end of the transverse slot 28, which is convenient for the wheel hub to enter, and the adjustment plate 25 in the lower clamping unit is located in the middle of the transverse slot 28. The wheel hub is installed into the wheel hub clamping assembly with the spoke side facing upward, and the bottom of the wheel hub is supported by the two adjustment plates 25. Then, the two adjustment plates 25 in the lower clamping unit move toward the middle, so that the adjustment plates 25 contact the lower end of the wheel hub, thereby effectively fixing the wheel hub to ensure the precision machining. Stable, when the finish turning of one side of the hub with the spoke is completed, the two adjusting plates 20 in the upper clamping unit move toward the center and contact with the upper end of the hub, the upper end of the hub is fixed by the adjusting plate 20, and the hub is driven to flip and rotate 180 degrees through the hub clamping assembly to maintain its flipping stability, eliminating the steps of taking the hub out of the fixture and flipping it, and the operation of directly flipping after fixing is adopted to improve the flipping efficiency. After the flipping is completed, the adjusting plate 25 in the lower clamping unit is in an open state, which is convenient for the subsequent finish turning of the other side of the hub.

[0031] See also Figure 4 As shown, a slider 31 is provided at the other end of the adjustment plate 1 20 , and the slider 31 slides in another movable plate 19 .

[0032] See also Figure 3 and Figure 5As shown, the upper surface of the adjustment plate 1 20 and the lower surface of the adjustment plate 2 25 are both provided with an arc groove 21, and the arc groove 21 has the same arc length as the wheel hub. The bottom side of the adjustment plate 1 20 is provided with an inner fitting portion 23, and an outer fitting portion 22 is provided above the inner fitting portion 23. The outer fitting portion 22 is connected to the inner fitting portion 23 and the arc groove 21, and the inner wall surfaces of the outer fitting portion 22 and the inner fitting portion 23 are provided with convex heads that contact the end surface of the wheel hub. When the sliding seat 30 moves, it drives the adjustment plate 1 20 together. At this time, the convex heads on the outer fitting portion 22 and the inner fitting portion 23 are tightly fitted with one end of the wheel hub, and the convex heads are used to increase the friction between the adjustment plate 1 20 and the wheel hub, thereby effectively fixing one end of the wheel hub; similarly, the adjustment plate 2 25 is fixed to the other end of the wheel hub in the same way.

[0033] See also Figure 3 As shown, a flip plate 18 is rotatably installed on the inner wall surface of the supporting vertical plate 3, and a fixed plate 24 is fixedly arranged on the flip plate 18. A vertical slide groove 27 for vertical sliding of a movable plate 19 is provided on the top surface of the flip plate 18. An electric push rod 26 for pushing the movable plate 19 to move is installed on the upper surface of the fixed plate 24. The flip motor is installed on a supporting vertical plate 3, and drives the flip plate 18 to flip and rotate. According to the wheel width length of the wheel hub, the working state of the electric push rod 26 is changed, and the movable plate 19 is pushed upward by the electric push rod 26 to slide vertically in the vertical slide groove 27. At this time, a wheel hub with a longer width can be installed; when the electric push rod 26 retracts downward and drives the movable plate 19 to approach the fixed plate 24, a wheel hub with a shorter width can be installed at this time, which is suitable for the positioning of wheel hubs with different wheel widths.

[0034] See also Figure 1 As shown, a stand 6 is installed above the wheel hub clamping assembly, a linear guide 7 is installed on the top surface of the stand 6, a limit seat 8 is slidably installed on the linear guide 7, and a segmented grinding assembly 9 driven by a hydraulic cylinder is arranged below the limit seat 8. The limit seat 8 slides in the linear guide 7 to reach the specified grinding position. The segmented grinding assembly 9 can adapt to the grinding of different surfaces of the wheel hub and improve the processing efficiency.

[0035] See also Figure 2 As shown, the segmented grinding assembly 9 includes a connecting plate 10, a reciprocating cylinder 11 is installed on the bottom surface of the connecting plate 10, a mounting plate 12 is installed on the driving end of the reciprocating cylinder 11, and a grinding wheel 13 driven by a grinding motor is installed on the lower surface of the reciprocating cylinder 11 for lifting and lowering. The grinding wheel 13 is used for grinding the spokes of the wheel hub. When grinding the spokes of the wheel hub, the reciprocating cylinder 11 pushes the mounting plate 12 to slide on the bottom surface of the connecting plate 10, so that the grinding inner roller 16 and the grinding outer roller 17 are away from the inner and outer wall surfaces of the wheel hub, and the bottom end of the wheel hub is clamped by the lower clamping unit, and the wheel hub rotates synchronously with the rotating disk 2 to rotate and grind the spokes of the wheel hub, while the upper clamping unit is in an open state to avoid interference during grinding.

[0036] See also Figure 2 As shown, a bidirectional slide 14 is installed on the other side of the lower surface of the mounting plate 12, and a grinding inner roller 16 and a grinding outer roller 17 driven by two grinding motors are installed on the two slides of the bidirectional slide 14 respectively. The grinding inner roller 16 and the grinding outer roller 17 are respectively used for rotational grinding of the inner wall and outer wall of the hub.

[0037] When the grinding of one side of the wheel hub spoke is completed, the two adjustment plates 20 in the upper clamping unit move toward the center and contact with the upper end of the wheel hub. The upper end of the wheel hub is fixed by the adjustment plate 20, and then the flip plate 18 drives the wheel hub to flip and rotate 180 degrees. At this time, the side of the wheel hub with the spoke faces downward, and the two adjustment plates 25 slide open; initially, the two grinding inner rollers 16 and the grinding outer rollers 17 are in a separated state. When grinding the other side of the wheel hub, the segmented grinding assembly 9 rises, and the reciprocating cylinder 11 pushes the mounting plate 12 to slide on the upper limit position of the connecting plate 10. The inner grinding roller 16 and the outer grinding roller 17 are located above the inner and outer walls of the hub, and the hydraulic cylinder pushes the segmented grinding assembly 9 downward, and the corresponding inner grinding roller 16 and the outer grinding roller 17 are driven to approach each other through the bidirectional slide 14, and respectively roll in contact with the inner and outer walls of the hub. When the hub rotates, the rotation direction of the inner grinding roller 16 and the outer grinding roller 17 is opposite to that of the rotating disk 2, and the unevenness on the surface of the hub is evenly removed, and the grinding wheel 13 continues to move downward and contacts with the other side of the spoke, thereby grinding the reverse side of the spoke.

[0038] See also Figure 6 As shown, a dust collecting groove 5 is provided in the middle of the upper surface of the rotating disk 2, a driving gear 32 is installed on the outer wall surface of a supporting vertical plate 3, and a rack 33 is meshed and driven above and below the driving gear 32, and the rack 33 slides on the corresponding supporting vertical plate 3, and a connecting rod 34 is fixed to the end of the rack 33, and a limiting pin 35 is provided at the end of each connecting rod 34. The bottom side of the supporting vertical plate 3 is rotatably connected to the rotating plate 4, and the end surfaces of the two rotating plates 4 are provided with corresponding limiting pins 35. The sliding guide groove 36, during the fine machining of the wheel hub, that is, at the beginning, the two rotating plates 4 rotate and fit with the supporting vertical plates 3 and are in a vertical state to intercept the splashing of dust. The dust is concentrated in the dust collecting groove 5. When cleaning is needed, the driving gear 32 rotates to drive the upper and lower racks 33 to slide to the corresponding side, and the racks 33 push the connecting rod 34. The limit pin 35 at the end of the connecting rod 34 slides in the guide groove 36. At this time, the rotating plate 4 is in an open state, which is easy to clean the dust collecting groove 5.

[0039] When the present invention is in use, by setting a hub clamping assembly, the bottom of the hub is supported by two adjusting plates 25, and then the two adjusting plates 25 in the lower clamping unit move toward the center, so that the adjusting plates 25 contact the lower end of the hub, thereby effectively fixing the hub to ensure the stability of the fine turning process. When the fine turning of one side of the hub with the spoke is completed, the two adjusting plates 1 20 in the upper clamping unit move toward the center and contact the upper end of the hub, and the upper end of the hub is fixed by the adjusting plates 1 20. The hub is driven to flip and rotate 180 degrees by the hub clamping assembly to maintain its flipping stability, eliminating the steps of taking the hub out of the fixture and flipping it, and taking the operation of directly flipping after fixing, thereby improving the flipping efficiency. After the flipping is completed, the adjusting plates 25 in the lower clamping unit are in an open state, which is convenient for the subsequent fine turning process on the other side of the hub.

[0040] By setting the segmented grinding assembly 9, the reciprocating cylinder 11 pushes the mounting plate 12 to slide on the bottom surface of the connecting plate 10, so that the grinding inner roller 16 and the grinding outer roller 17 are away from the inner and outer wall surfaces of the wheel hub, and the spoke surface of the wheel hub is polished; the turning plate 18 drives the wheel hub to turn and rotate 180 degrees, at this time, the side of the wheel hub with the spoke faces downward, and the reciprocating cylinder 11 pushes the mounting plate 12 to slide on the upper limit position of the connecting plate 10, at this time, the grinding inner roller 16 and the grinding outer roller 17 are located just above the inner and outer walls of the wheel hub, and then the segmented grinding assembly 9 is pushed downward by the hydraulic cylinder, and the grinding inner roller 16 and the grinding outer roller 17 are respectively in rolling contact with the inner wall and outer wall of the wheel hub after approaching each other, and the rotation direction of the grinding inner roller 16 and the grinding outer roller 17 is opposite to the rotation direction of the rotating disk 2, so as to evenly remove the unevenness on the surface of the wheel hub, and the grinding wheel 13 therein continues to contact downward with the reverse side of the spoke, so as to adapt to the grinding of different surfaces of the wheel hub and improve the processing efficiency;

[0041] The two rotating plates 4 are rotated and fitted with the supporting upright plates 3 and are in a vertical state to intercept the flying dust. The dust is collected in the dust collecting trough 5. When cleaning is needed, the driving gear 32 therein rotates to drive the upper and lower racks 33 to slide to the corresponding side. The racks 33 push the connecting rod 34, and the limit pin 35 at the end of the connecting rod 34 slides in the guide groove 36. At this time, the rotating plate 4 is in an open state, which is easy to clean the dust collecting trough 5.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A turning device for fully automatic finishing of a passenger car wheel hub, comprising a rotating disk (2) embedded and mounted on the upper surface of a finishing table (1), characterized in that: Two supporting upright plates (3) are fixedly mounted on the upper surface of the rotating disk (2), and a wheel hub clamping assembly driven by a flip motor is rotatably mounted between the inner wall surfaces of the two supporting upright plates (3), and the wheel hub clamping assembly comprises an upper clamping unit and a lower clamping unit, and the upper clamping unit comprises two hollow movable plates (19), wherein a bidirectional lead screw (29) is mounted in one of the movable plates (19), and two opposite threads on the outside of the bidirectional lead screw (29) are sleeved with a slide seat (30), and a transverse slide groove (28) communicating with the inner cavity of the movable plate (19) is provided on the side surface of the movable plate (19), and the end surface of the slide seat (30) is slidably fitted with the inner cavity of the movable plate (19) and the transverse slide groove (28), and the other end surface of the slide seat (30) is fixedly connected with an adjustment plate 1 (20), and the adjustment plate 1 (20) is fitted and fixed with one end of the wheel hub; The lower clamping unit comprises two fixed plates (24), the fixed plates (24) having the same structure as the movable plate (19), and two side ends of the two fixed plates (24) are slidably provided with a second adjustment plate (25), and the second adjustment plate (25) is fitted and fixed to the other end of the wheel hub; The upper surface of the adjustment plate 1 (20) and the lower surface of the adjustment plate 2 (25) are both provided with an arc groove (21), the arc groove (21) having the same arc length as the wheel hub, the bottom side surface of the adjustment plate 1 (20) is provided with an inner fitting portion (23), the upper portion of the inner fitting portion (23) is provided with an outer fitting portion (22), the outer fitting portion (22) is connected with the inner fitting portion (23) and the arc groove (21), and the inner wall surfaces of the outer fitting portion (22) and the inner fitting portion (23) are provided with convex heads that contact the end surface of the wheel hub; The first adjustment plate (20) in the upper clamping unit is located at the end of the transverse slide groove (28) to facilitate the entry of the wheel hub, while the second adjustment plate (25) in the lower clamping unit is located in the middle of the transverse slide groove (28), and the wheel hub is installed into the wheel hub clamping assembly with the spoke side facing upward; The bottom of the wheel hub is supported by two adjusting plates 2 (25), and then the two adjusting plates 2 (25) in the lower clamping unit are moved toward the middle so that the adjusting plates 2 (25) contact the lower end of the wheel hub to fix the wheel hub; After the finish machining of the spoke side of the wheel hub is completed, the two adjustment plates (20) in the upper clamping unit move inward and contact the upper end of the wheel hub. The upper end of the wheel hub is fixed by the adjustment plate (20), and the wheel hub is driven to flip and rotate 180 degrees through the wheel hub clamping assembly to maintain its flipping stability. After the fixation, the flipping operation is directly performed. After the flipping is completed, the adjustment plate (25) in the lower clamping unit is in an open state, which is convenient for the finish machining of the other side of the wheel hub.

2. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 1 is characterized in that: A slider (31) is provided at the other end of the first adjustment plate (20), and the slider (31) slides inside the other movable plate (19).

3. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 1 is characterized in that: A flip plate (18) is rotatably mounted on the inner wall surface of the supporting vertical plate (3); the fixed plate (24) is fixedly arranged on the flip plate (18); a vertical slide groove (27) for vertical sliding of the movable plate (19) is provided on the top surface of the flip plate (18); and an electric push rod (26) for pushing the movable plate (19) to move is installed on the upper surface of the fixed plate (24).

4. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 1 is characterized in that: A stand (6) is installed above the wheel hub clamping assembly, a linear guide rail (7) is installed on the top surface of the stand (6), a limit seat (8) is slidably installed on the linear guide rail (7), and a segmented grinding assembly (9) driven by a hydraulic cylinder is arranged below the limit seat (8).

5. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 4 is characterized in that: The segmented grinding assembly (9) comprises a connecting plate (10), a reciprocating cylinder (11) is mounted on the bottom surface of the connecting plate (10), a mounting plate (12) is mounted on the driving end of the reciprocating cylinder (11), and a grinding wheel (13) driven by a grinding motor is mounted on the lower surface of the reciprocating cylinder (11) in a lifting manner, wherein the grinding wheel (13) is used for grinding the wheel hub spokes.

6. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 5 is characterized in that: A bidirectional slide (14) is installed on the other side of the lower surface of the mounting plate (12), and a grinding inner roller (16) and a grinding outer roller (17) driven by two grinding motors are installed on the two slides of the bidirectional slide (14), respectively. The grinding inner roller (16) and the grinding outer roller (17) are used for rotational grinding of the inner wall and the outer wall of the wheel hub, respectively.

7. The dedicated turning device for fully automatic finishing of a passenger car wheel hub according to claim 1 is characterized in that: A dust collecting groove (5) is provided in the middle of the upper surface of the rotating disk (2); a driving gear (32) is installed on the outer wall surface of one of the supporting upright plates (3); racks (33) are meshed and driven above and below the driving gear (32); the racks (33) slide in a limited position on the corresponding supporting upright plates (3); and a connecting rod (34) is fixedly connected to the end of the rack (33); a limiting pin (35) is provided at the end of each connecting rod (34); a rotating plate (4) is rotatably connected to the bottom side surface of the supporting upright plates (3); and guide grooves (36) for limiting the sliding of the corresponding limiting pins (35) are provided on the end surfaces of the two rotating plates (4).

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