Full-automatic positioning system for hub CNC machining center

Abstract

The full-automatic positioning system for the hub CNC machining center comprises a table plate, a main center through hole is formed in the middle of the table plate, guiding through grooves extending in the inclined direction are formed in the front portions and the rear portions of the left portion and the right portion of the table plate, and a lower fixing shell is fixed to the middle of the bottom face of the table plate; a fine adjustment mechanism is fixed to the top face of a bottom plate of the lower fixing shell, a vertical sleeve body is fixed to the middle of the top face of a top horizontal moving plate of the fine adjustment mechanism and inserted into the main center through hole in a sleeved mode, and the upper portion of the vertical sleeve body extends out of the top end of the main center through hole. A telescopic air cylinder is inserted into the vertical sleeve body, the bottom of the telescopic air cylinder is fixed to the middle of the top face of the top horizontal moving plate, a lifting push rod is fixed to the top end of a push rod of the telescopic air cylinder, and the middle of the lifting push rod is inserted into the first center through hole; hubs with similar sizes can be clamped for machining, and the requirement of mixed line production can be met.

Description

Technical field:

[0001] The invention relates to the technical field of wheel hub processing, and more specifically to a full-automatic positioning system for a wheel hub CNC processing center. Background technology:

[0002] The existing CNC machining center fixture can only be equipped with one set of tooling for one type of wheel hub, and can only process a certain type of wheel hub. When changing the wheel hub, the tooling fixture must be replaced, which is single and limited.

[0003] However, with the introduction of automation technology and the investment in mixed-line production technology and processes (conveyance of wheels of similar sizes), a single tooling fixture cannot meet the automation needs, that is, when the sizes of the wheels conveyed are different but similar, such as 19 to 22-inch wheels, the sizes of the center through holes of the wheels are different. Therefore, when conveying wheels of different sizes, a set of tooling fixtures needs to be replaced, which makes it impossible to achieve continuous production of mixed lines and continuous automatic processing of mixed lines. Summary of the invention:

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fully automatic positioning system for a wheel hub CNC machining center, which can clamp wheel hubs of similar sizes for machining and meet the needs of mixed-line production.

[0005] The solution of the present invention to solve the technical problem is:

[0006] A fully automatic positioning system for a wheel hub CNC machining center comprises a table, wherein a main center through hole is formed in the middle of the table, and guide through grooves extending obliquely are formed at the front and rear of the left and right parts of the table, a lower fixed shell is fixed in the middle of the bottom surface of the table, a fine-tuning mechanism is fixed on the top surface of the bottom plate of the lower fixed shell, a vertical sleeve body is fixed in the middle of the top surface of the top horizontal moving plate of the fine-tuning mechanism, the vertical sleeve body is inserted in the main center through hole, and its upper part extends out of the top of the main center through hole, a first center through hole is formed in the middle of the top plate of the vertical sleeve body, a telescopic cylinder is inserted in the interior of the vertical sleeve body, the bottom of the telescopic cylinder is fixed to the middle of the top surface of the top horizontal moving plate, a lifting push rod is fixed to the top of the push rod of the telescopic cylinder, the middle part of the lifting push rod is inserted in the first center through hole, and the top of the lifting push rod extends out of the top surface of the vertical sleeve body and is fixed with a conical positioning core;

[0007] The guide grooves are each provided with a pressing oil cylinder and a padding block that are adjusted and moved along the guide grooves, and the wheel rim at the bottom of the wheel hub to be processed is clamped between the top surface of the corresponding padding block and the bottom surface of the pressing block of the pressing oil cylinder;

[0008] The upper part of the conical positioning core is inserted into the central through hole of the hub of the wheel hub, and the outer wall thereof is pressed against the conical wall formed on the inner wall of the bottom end of the central through hole.

[0009] An annular groove is formed on the inner side wall of the first central through hole, and the sealing ring is nested in the annular groove. The inner side wall of the sealing ring is tightly attached to the outer side wall of the lifting push rod.

[0010] A corrugated elastic protective sleeve is fixed on the outer side wall of the vertical sleeve body, and the bottom end of the corrugated elastic protective sleeve is pressed against the top surface of the table plate and covers the main central through hole.

[0011] The upper connecting seat of the clamping cylinder is located on the top surface of the table plate, and the bottom surface of the upper connecting seat is close to the top surface of the table plate. A cylinder body is formed on the bottom surface of the upper connecting seat, and the cylinder body is inserted into the corresponding guide groove. The bottom of the cylinder body extends out of the bottom end of the corresponding guide groove and is screwed into a screw-in through hole formed in the middle of the top surface of the bottom seat. A sealing ring is clamped between the bottom outer wall of the cylinder body and the bottom inner wall of the screw-in through hole of the bottom seat.

[0012] The front and rear side walls of the cylinder body are in close contact with the front and rear inner side walls of the corresponding guide slots.

[0013] A first vertical arm is movably connected to the top surface convex portion on the inner side of the upper connecting seat portion through a hinge shaft, and a flip block is movably connected to the upper part of the first vertical arm through a hinge shaft, and the top of the push rod in the cylinder body extends out of the outer top surface of the upper connecting seat portion, and the lower part of the outer side of the flip block is movably connected to the top of the push rod through a hinge shaft;

[0014] A pressing plate is fixed on the top surface of the flip block, and a pressing block is fixed on the inner end bottom surface of the pressing plate.

[0015] The fine adjustment mechanism is located in the lower fixed housing;

[0016] The fine-tuning mechanism includes a lower horizontal plate, the bottom surface of which is fixed to the top surface of the bottom plate of the lower fixed shell, the front and rear portions of the top surface of the lower horizontal plate are fixed with guide rails extending left and right, a middle horizontal fixed plate is provided above the lower horizontal plate, the front and rear portions of the bottom surface of the middle horizontal fixed plate are fixed with a first guide slider, the lower portion of the first guide slider is inserted into the guide groove of the corresponding guide rail and cooperates with the guide groove.

[0017] The left and right parts of the top surface of the middle horizontal fixed plate are fixed with upper guide rails extending forward and backward, the top horizontal movable plate is located above the middle horizontal fixed plate, and the left and right parts of the bottom surface of the top horizontal movable plate are fixed with second guide sliders, and the lower part of the second guide slider is inserted into the guide groove of the corresponding upper guide rail and cooperates with the guide groove.

[0018] A first sensing protrusion is fixed to the middle of the right side wall of the top horizontal moving plate, and a first displacement sensor is fixed to the middle of the inner side wall of the right side plate of the corresponding lower fixed shell, and the first sensing protrusion is sensed by the first displacement sensor;

[0019] A second sensing protrusion is fixed to the middle of the rear side wall of the top horizontal moving plate, and a second displacement sensor is fixed to the middle of the inner side wall of the rear side plate of the corresponding lower fixed shell, and the second sensing protrusion is sensed by the second displacement sensor.

[0020] The outstanding effects of the present invention are:

[0021] Compared with the existing technology, it can clamp wheels of similar sizes for processing and meet the needs of mixed-line production. Description of the drawings:

[0022] Figure 1 It is a schematic diagram of the local structure of the table of the present invention;

[0023] Figure 2 It is a partial structural schematic diagram of the present invention;

[0024] Figure 3 yes Figure 2 A partial enlarged view of

[0025] Figure 4 It is a partial top view of the fine-tuning mechanism;

[0026] Figure 5 It is a schematic diagram of the local structure at the locking plate;

[0027] Figure 6 It is a schematic diagram of the local structure between the cylinder body and the bottom seat. Specific implementation method:

[0028] For example, see Figures 1 to 6 As shown, a fully automatic positioning system for a wheel hub CNC machining center includes a table 10, the left and right walls of the table 10 are fixed with a vertically extending flip table 60, a main horizontal bottom plate is directly below the table 10, and the left and right top surfaces of the main horizontal bottom plate are fixed with connecting seats, and the middle of the outer side walls of the two flip table 60 are fixed with rotating shafts, and the rotating shafts are movably connected to the corresponding connecting seats through bearings, and a reduction box and a servo motor are fixed to one of the connecting seats, and the output shaft of the servo motor extends into the reduction box and is fixed to the input shaft in the reduction box, and the output shaft of the reduction box is connected to the corresponding rotating shaft, and the table 10 can be flipped by the operation of the servo motor. It is a conventional structure and will not be described in detail here;

[0029] A main center through hole 11 is formed in the middle of the table 10, and obliquely extending guide through grooves 12 are formed at the front and rear of the left and right parts of the table 10. A lower fixed shell 20 is fixed to the middle of the bottom surface of the table 10, and a fine-tuning mechanism 30 is fixed to the top surface of the bottom plate of the lower fixed shell 20. A vertical sleeve body 32 is fixed to the middle of the top surface of the top horizontal moving plate 31 of the fine-tuning mechanism 30. The vertical sleeve body 32 is inserted into the main center through hole 11, and its upper part protrudes from the main center through hole 11. At the top, a first central through hole is formed in the middle of the top plate of the vertical sleeve body 32, a telescopic cylinder 33 is inserted inside the vertical sleeve body 32, the bottom of the telescopic cylinder 33 is fixed to the middle of the top surface of the top horizontal moving plate 31, and a lifting push rod 34 is fixed to the top of the push rod of the telescopic cylinder 33 by bolts, and the middle part of the lifting push rod 34 is inserted in the first central through hole, and the top of the lifting push rod 34 extends out of the top surface of the vertical sleeve body 32 and is fixed to a conical positioning core 35 by bolts.

[0030] The guide grooves 12 are provided with a clamping cylinder 40 and a padding block 50 that are adjusted and moved along the guide grooves 12, and the wheel rim 101 at the bottom of the wheel hub 100 to be processed is clamped between the top surface of the corresponding padding block 50 and the bottom surface of the clamping block 47 of the clamping cylinder 40;

[0031] The upper portion of the conical positioning core 35 is inserted into the central through hole 103 of the hub portion 102 of the wheel hub 100 , and its outer side wall is pressed against the conical wall formed on the inner side wall of the bottom end of the central through hole 103 .

[0032] Furthermore, an annular groove is formed on the inner side wall of the first central through hole, and the sealing ring is nested in the annular groove. The inner side wall of the sealing ring is in close contact with the outer side wall of the lifting push rod 34.

[0033] Furthermore, a corrugated elastic protective sleeve 1 is fixed on the outer side wall of the vertical sleeve body 32 , and the bottom end of the corrugated elastic protective sleeve 1 is pressed against the top surface of the table 10 and covers the main central through hole 11 .

[0034] Further, the upper connecting seat portion 41 of the clamping oil cylinder 40 is located on the top surface of the table 10, the bottom surface of the upper connecting seat portion 41 is close to the top surface of the table 10, and the bottom surface of the upper connecting seat portion 41 is formed with a cylinder body 42, and the cylinder body 42 is inserted into the corresponding guide groove 12, and the bottom of the cylinder body 42 extends out of the bottom end of the corresponding guide groove 12 and is screwed into the screw-connected through hole formed in the middle of the top surface of the bottom seat 43, as shown in FIG. Figure 6 As shown, the bottom end of the cylinder body 42 is formed with an extension portion extending downward, the inner wall of the bottom of the screw-connected through hole is a smooth wall surface, an annular groove is formed on the inner wall, and the sealing ring is nested in the annular groove. The extension portion is inserted into the bottom end of the screw-connected through hole, and the outer wall of the extension portion is tightly attached to the inner wall of the bottom end of the screw-connected through hole, and its outer wall is pressed against the sealing ring.

[0035] Furthermore, the front and rear side walls of the cylinder body 42 are in close contact with the front and rear inner side walls of the corresponding guide slot 12 .

[0036] Furthermore, a first vertical arm 44 is movably connected to the top surface convex portion on the inner side of the upper connecting seat portion 41 through a hinge shaft, and a flip block 45 is movably connected to the upper portion of the first vertical arm 44 through a hinge shaft, and the top of the push rod in the cylinder body 42 extends out of the outer top surface of the upper connecting seat portion 41, and the lower portion of the outer side of the flip block 45 is movably connected to the top of the push rod through a hinge shaft;

[0037] A pressing plate 46 is fixed to the top surface of the flip block 45 , and a pressing block 47 is fixed to the inner bottom surface of the pressing plate 46 .

[0038] Furthermore, the fine-tuning mechanism 30 is located in the lower fixed housing 20;

[0039] The fine adjustment mechanism 30 is located in the lower fixed housing 20;

[0040] The fine-tuning mechanism 30 includes a lower horizontal plate 36, the bottom surface of which is fixed to the top surface of the bottom plate of the lower fixed shell 20, and the front and rear portions of the top surface of the lower horizontal plate 36 are fixed with guide rails 2 extending left and right, and a middle horizontal fixed plate 37 is provided above the lower horizontal plate 36, and the front and rear portions of the bottom surface of the middle horizontal fixed plate 37 are fixed with a first guide slider 3, and the lower portion of the first guide slider 3 is inserted into the guide groove of the corresponding guide rail 2 and cooperates with the guide groove.

[0041] The left and right parts of the top surface of the middle horizontal fixed plate 37 are fixed with upper guide rails 4 extending forward and backward, the top horizontal movable plate 31 is located above the middle horizontal fixed plate 37, and the left and right parts of the bottom surface of the top horizontal movable plate 31 are fixed with second guide sliders 5, and the lower part of the second guide slider 5 is inserted into the guide groove of the corresponding upper guide rail 4 and cooperates with the guide groove.

[0042] A first sensing protrusion 6 is fixed to the middle of the right side wall (X-axis direction) of the top horizontal moving plate 31, and a first displacement sensor 7 is fixed to the middle of the inner side wall of the right side plate of the corresponding lower fixed shell 20, and the first sensing protrusion 6 is sensed by the first displacement sensor 7;

[0043] A second sensing protrusion 8 is fixed to the middle part of the rear side wall (Y-axis direction) of the top horizontal moving plate 31 , and a second displacement sensor 9 is fixed to the middle part of the inner side wall of the rear side plate of the corresponding lower fixed shell 20 , and the second sensing protrusion 8 is sensed by the second displacement sensor 9 .

[0044] The first displacement sensor 7 and the second sensing protrusion 8 used in this embodiment are both Balluff sensors, whose model is BML041H, which are magnetic coding sensors. They are products directly purchased on the market and will not be described in detail. Their minimum accuracy can reach 1μm, which is high in accuracy. They can sense the movement distance and movement position of the corresponding first sensing protrusion 6 or second sensing protrusion 8, thereby sensing the micro-movement distance of the conical positioning core 35 in the XY axis direction.

[0045] Furthermore, a lower moving block 48 is fixed to the bottom surface of the bottom seat 43, an outer fixing plate 13 is fixed to the bottom surface of the table plate 10 at the outer side of the corresponding guide groove 12, an inner fixing plate 14 is fixed to the bottom surface of the table plate 10 near the inner end of the guide groove 12, and the fine-tuning screw 15 is movably connected to the outer fixing plate 13 and the inner fixing plate 14 through a bearing, and a mobile servo motor is fixed to the outer side wall of the corresponding outer fixing plate 13, and the output shaft of the mobile servo motor is a spline shaft, which is inserted into the spline hole at one end of the corresponding fine-tuning screw 15 and drives the fine-tuning screw 15 to rotate, and the lower moving block 48 is screwed on the corresponding fine-tuning screw 15.

[0046] Furthermore, a height block 411 is fixed on the inner side wall of the upper connecting seat 41, and a lower guide block 412 is fixed on the bottom surface of the height block 411. The lower guide block 412 is inserted into the corresponding guide slot 12, and the corresponding two side walls of the lower guide block 412 are closely attached to the corresponding inner side walls of the corresponding guide slot 12. The bottom surface of the height block 411 covers the guide slot 12 directly below it.

[0047] Furthermore, the inner end of the fine-tuning screw 15 extends out of the inner side wall of the corresponding inner fixing plate 14 and is formed with an extended positioning shaft portion 151, and an outer tooth portion is formed on the outer side of the extended positioning shaft portion 151. A transverse guide column 141 is fixed on the upper inner side wall of the inner fixing plate 14, and a radially extending limiting edge is formed on the outer side wall of the outer end of the transverse guide column 141. The locking plate 50 is installed on the transverse guide column 141 and the extended positioning shaft portion 151;

[0048] The middle part of the upper part of the locking plate 50 is formed with an upper adjusting slot 51 extending vertically. The front and rear side walls of the transverse guide column 141 are vertical wall surfaces, which are tightly attached to the corresponding front and rear inner side walls of the upper adjusting slot 51. The bottom surface of the transverse guide column 141 is a horizontal surface, which is pressed against the bottom surface of the upper adjusting slot 51. The bottom end of the first compression spring 142 is fixed to the middle part of the top surface of the transverse guide column 141, and the top end of the first compression spring 142 is fixed to the top surface of the upper adjusting slot 51. The first compression spring 142 is in the upper adjusting slot 51. The inner end of the transverse guide column 141 extends out of the upper adjusting slot 51 and is fixed with a limiting plate 52. The distance between the front and rear sides of the limiting plate 52 is greater than the distance between the front and rear walls of the upper adjusting slot 51. This structure allows the locking plate 50 to be lifted and lowered along the limiting plate 52 and the radially extending limiting edge when moving up and down, thereby ensuring stable movement.

[0049] A waist-shaped through hole 53 extending vertically from the middle to the lower part of the locking plate 50 is formed, and a tooth-shaped positioning groove is formed on the bottom surface of the waist-shaped through hole 53. The outer tooth portion of the lower part of the extended positioning shaft portion 151 is inserted into the tooth-shaped positioning groove, and the two cooperate with each other, and the bottom of the extended positioning shaft portion 151 is pressed against the bottom surface of the waist-shaped through hole 53.

[0050] Furthermore, a lower baffle plate 152 is fixed on the inner end surface of the extended positioning shaft portion 151 , and the distance between the front and rear walls of the lower baffle plate 152 is greater than the distance between the front and rear inner walls of the waist-shaped through hole 53 .

[0051] A horizontal mounting plate is fixed on the side wall of the inner fixed plate 14 below the locking plate 50, and a locking cylinder 70 is fixed on the bottom surface of the horizontal mounting plate. The top end of the push rod of the locking cylinder 70 extends out of the top surface of the corresponding horizontal mounting plate and is fixed on the bottom surface of the locking plate 50.

[0052] In this embodiment, the conical positioning cores 35 of different sizes can be replaced according to the installation and use of different mixed batch wheel hubs 100 to meet the use of mixed batch wheel hubs 100 of different specifications. For example, a 19-inch to 22-inch wheel hub 100 can use one conical positioning core 35, and a 15-inch to 18-inch wheel hub 100 can be replaced with another conical positioning core 35 of corresponding size to meet the clamping needs of the corresponding mixed batch wheel hub 100.

[0053] All cylinders in this embodiment are connected to the corresponding pneumatic system through connecting pipes, and all oil cylinders are connected to the corresponding hydraulic system through connecting pipes. The pneumatic system and the hydraulic system are both existing conventional structures and will not be described in detail here. All electrical components in this embodiment are electrically connected to the control host through electrical connecting lines and are controlled and operated by the control host. It is a conventional structure and will not be described in detail here.

[0054] When this embodiment is used, it is installed in an automated assembly line. A six-axis robot is installed around this embodiment (it uses an existing known six-axis robot, which will not be described in detail here). It can automatically grab the delivered wheel hub 100, and then place it in the middle of the top surface of the table 10, and its bottom rim 101 is placed on the top surface of the inner end of the corresponding equal height block 411. Before placement, the delivered wheel hub 100 has been measured by the grating sensor at the front of the conveyor frame. Therefore, before the six-axis robot grabs and places it, all the locking cylinders 70 are The push rod retracts, causing the locking plate 50 to drop, and the outer tooth portion at the bottom of the extended positioning shaft 151 is separated from the corresponding tooth-shaped positioning groove, and the mobile servo motor is operated to move the equal height block 411 and the clamping cylinder 40 to the corresponding position (when moving, the mobile servo motor drives the fine-tuning screw 15 to rotate a full circle to ensure that the subsequent outer tooth portion and the corresponding tooth-shaped positioning groove can be matched and inserted), then, the push rod of the locking cylinder 70 pushes, causing the locking plate 50 to lift, so that the outer tooth portion at the bottom of the extended positioning shaft 151 is matched with and inserted into the corresponding tooth-shaped positioning groove, completing the locking.

[0055] Then, the six-axis robot presses the bottom surface of the rim 101 at the lower part of the wheel hub 100 against the inner end top surface of the corresponding equal height block 101, and then, the push rod of the clamping oil cylinder 40 pushes to rotate the flip block 45, so that the bottom surface of the clamping block 47 presses against the top surface of the corresponding wheel rim 101, thereby clamping and fixing the wheel hub 100;

[0056] Then, the push rod of the telescopic cylinder 33 is pushed, and the conical positioning core 35 is introduced into the central through hole 102 of the wheel hub 100. Since the outer wall of the conical positioning core 35 is a conical wall surface, and the lower inner wall of the central through hole 102 is a conical wall surface, when the conical positioning core 35 is inserted, there will be deviation when the wheel hub 100 is clamped. At this time, the conical positioning core 35 will automatically adjust left and right and front and back along with the lower inner wall of the central through hole 102, so that it is inserted and positioned with the central through hole 102, and its left and right and front and back The displacement is sensed by the first displacement sensor 7 and the second sensing protrusion 8 and fed back to the control host. The control host then makes corresponding compensation to change the center coordinates, that is, the automatic alignment function of the numerical control system in the control host is used to compensate for the positions in the left and right, front and back (XY axis) directions, reposition the center coordinates, and after the automatic compensation is completed, the machining center is tested (the control host performs a simulation test, which is an existing conventional operation method and will not be described in detail here) to see whether the position error has been successfully eliminated. After completion, normal production begins.

[0057] Each wheel hub 100 has its own center coordinates, and the positioning accuracy is high, so that the radial runout of the conical positioning core 35 is ≤0.02mm, thereby ensuring the accuracy of subsequent processing.

[0058] This embodiment can clamp and fix wheel hubs 100 of similar but different sizes, thereby meeting the needs of mixed batch processing and achieving continuous processing.

[0059] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A fully automatic positioning system for a wheel hub CNC machining center, comprising a table (10), characterized in that: A main center through hole (11) is formed in the middle of the table (10), and obliquely extending guide through grooves (12) are formed at the front and rear of the left and right parts of the table (10). A lower fixed shell (20) is fixed in the middle of the bottom surface of the table (10), and a fine adjustment mechanism (30) is fixed on the top surface of the bottom plate of the lower fixed shell (20). A vertical sleeve body (32) is fixed in the middle of the top surface of the top horizontal moving plate (31) of the fine adjustment mechanism (30), and the vertical sleeve body (32) is inserted into the main center through hole (11), and its upper part protrudes out of the main center through hole. The top of the vertical sleeve body (11), the middle of the top plate of the vertical sleeve body (32) is formed with a first central through hole, the interior of the vertical sleeve body (32) is sleeved with a telescopic cylinder (33), the bottom of the telescopic cylinder (33) is fixed to the middle of the top surface of the top horizontal moving plate (31), the top of the push rod of the telescopic cylinder (33) is fixed with a lifting push rod (34) by bolts, the middle of the lifting push rod (34) is sleeved in the first central through hole, the top of the lifting push rod (34) extends out of the top surface of the vertical sleeve body (32) and is fixed with a conical positioning core (35); The guide groove (12) is provided with a clamping cylinder (40) and a padding block (50) that are adjustable and movable along the guide groove (12), and a wheel rim (101) at the bottom of the wheel hub (100) to be processed is clamped between the top surface of the corresponding padding block (50) and the bottom surface of the clamping block (47) of the clamping cylinder (40); The upper part of the conical positioning core (35) is inserted into the central through hole (103) of the hub portion (102) of the wheel hub (100), and its outer wall is pressed against the conical wall formed on the inner wall of the bottom end of the central through hole (103).

2. The fully automatic positioning system for a wheel hub CNC machining center according to claim 1, characterized in that: An annular groove is formed on the inner side wall of the first central through hole, and the sealing ring is nested in the annular groove. The inner side wall of the sealing ring is in close contact with the outer side wall of the lifting push rod (34).

3. The fully automatic positioning system for a wheel hub CNC machining center according to claim 1, characterized in that: A corrugated elastic protective sleeve (1) is fixed on the outer side wall of the vertical sleeve body (32), and the bottom end of the corrugated elastic protective sleeve (1) is pressed against the top surface of the table plate (10) and covers the main central through hole (11).

4. The fully automatic positioning system for a wheel hub CNC machining center according to claim 1, characterized in that: The upper connecting seat (41) of the clamping oil cylinder (40) is located on the top surface of the table (10), the bottom surface of the upper connecting seat (41) is in close contact with the top surface of the table (10), the bottom surface of the upper connecting seat (41) is formed with a cylinder body (42), the cylinder body (42) is inserted into the corresponding guide groove (12), the bottom of the cylinder body (42) extends out of the bottom end of the corresponding guide groove (12) and is screwed into a screw-connected through hole formed in the middle of the top surface of the bottom seat (43), and a sealing ring is clamped between the bottom end outer wall of the cylinder body (42) and the bottom end inner wall of the screw-connected through hole of the bottom seat (43).

5. The fully automatic positioning system for a wheel hub CNC machining center according to claim 4 is characterized in that: The front and rear side walls of the cylinder body (42) are in close contact with the front and rear inner side walls of the corresponding guide groove (12).

6. The fully automatic positioning system for a wheel hub CNC machining center according to claim 4, characterized in that: A first vertical arm (44) is movably connected to the top surface convex portion on the inner side of the upper connecting seat (41) via a hinge shaft, and an upper portion of the first vertical arm (44) is movably connected to a flip block (45) via a hinge shaft, and a top portion of a push rod in a cylinder body (42) extends out of an outer top surface of the upper connecting seat (41), and a lower portion of an outer side of the flip block (45) is movably connected to the top of the push rod via a hinge shaft; A pressing plate (46) is fixed to the top surface of the turning block (45), and a pressing block (47) is fixed to the bottom surface of the inner end of the pressing plate (46).

7. The fully automatic positioning system for a wheel hub CNC machining center according to claim 1, characterized in that: The fine adjustment mechanism (30) is located in the lower fixed housing (20); The fine adjustment mechanism (30) comprises a lower horizontal plate (36), the bottom surface of the lower horizontal plate (36) is fixed on the top surface of the bottom plate of the lower fixed shell (20), the front and rear parts of the top surface of the lower horizontal plate (36) are fixed with guide rails (2) extending left and right, a middle horizontal fixed plate (37) is provided above the lower horizontal plate (36), the front and rear parts of the bottom surface of the middle horizontal fixed plate (37) are fixed with first guide sliders (3), and the lower part of the first guide slider (3) is inserted into the guide groove of the corresponding guide rail (2) and matches with the guide groove.

8. The fully automatic positioning system for a wheel hub CNC machining center according to claim 7, characterized in that: The left and right parts of the top surface of the middle horizontal fixed plate (37) are both fixed with upper guide rails (4) extending forward and backward, the top horizontal movable plate (31) is located above the middle horizontal fixed plate (37), and the left and right parts of the bottom surface of the top horizontal movable plate (31) are both fixed with second guide sliders (5), and the lower part of the second guide slider (5) is inserted into the corresponding guide groove of the upper guide rail (4) and matches the guide groove.

Images