Machining center elastic positioning tool for hub machining

Abstract

The machining center elastic positioning tool for hub machining comprises a machining center mounting bottom plate, a platen is fixed to the top face of the machining center mounting bottom plate, a core seat is fixed to the middle of the top face of the platen, a vertical column extending upwards is formed in the middle of the upper portion of the core seat, and a lower concave hole is formed in the middle of the top face of the vertical column. The lower portion of a compression spring is inserted into the lower concave hole in a sleeved mode, the bottom end of the compression spring abuts against the bottom face of the lower concave hole in a pressed mode, a sliding connection shaft sleeve is inserted into the upper portion of the vertical column in a sleeved mode, the inner side wall of the sliding connection shaft sleeve is tightly attached to the outer side wall of the vertical column, and the top end of the compression spring abuts against the bottom face of a top end plate of the sliding connection shaft sleeve in a pressed mode. The conical side wall of the positioning core is matched with the inner side wall of the bottom end of the central through hole formed in the middle of the hub part of the hub to be machined, so that the automatic centering effect is achieved, the machining centering effect of hubs with similar sizes can be achieved, and the automatic centering device is suitable for machining mixed batch products with similar sizes.

Description

Technical field:

[0001] The present invention relates to the technical field related to wheel hub processing equipment, and more specifically to an elastic positioning tool for a processing center used for wheel hub processing. Background technology:

[0002] The existing wheel hub needs to process PCD holes in the machining center, and it is necessary to install a center hole positioning tool on the center mounting base plate of the machining center. Since the size of each wheel hub is different, the position and size of the center hole are also different. Therefore, each batch of wheel hubs produced needs to be installed and used with a special positioning core. However, the positioning core is a rod with a certain size of the center hole, which is inserted into the corresponding center hole for support, centering and limiting. When the product is replaced, the positioning core must be replaced, which makes it unsuitable for mixed batches of products with similar sizes. That is, when the wheel hubs sent to the machining center are not of the same size, continuous production cannot be achieved and the positioning core needs to be replaced. The replacement is troublesome and the replacement cost is high, which makes it impossible to process continuously. Summary of the invention:

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an elastic positioning tool for a machining center for wheel hub processing. The conical side wall of its positioning core cooperates with the inner wall of the bottom end of the central through hole formed in the middle of the hub of the wheel hub to be processed, thereby realizing automatic centering, so that it can meet the processing centering function of wheel hubs of similar sizes and is suitable for the processing of mixed batch products of similar sizes.

[0004] The solution of the present invention to solve the technical problem is:

[0005] An elastic positioning tool for a machining center for wheel hub machining comprises a machining center mounting base plate, a table plate is fixed on the top surface of the machining center mounting base plate, a core seat is fixed in the middle of the top surface of the table plate, a vertical column extending upward is formed in the middle of the upper part of the core seat, a lower concave hole is formed in the middle of the top surface of the vertical column, a lower part of a compression spring is inserted into the lower concave hole, the bottom end of the compression spring is pressed against the bottom surface of the lower concave hole, a sliding connection sleeve is inserted into the upper part of the vertical column, the inner side wall of the sliding connection sleeve is tightly attached to the outer side wall of the vertical column, and the top end of the compression spring is pressed against the bottom surface of the top plate of the sliding connection sleeve;

[0006] A positioning core having a tapered outer wall is fixed on the top surface of the sliding connection sleeve, and an annular extension is formed on the lower outer wall of the sliding connection sleeve;

[0007] The core fixing sleeve is fixed on the core seat, the sliding connection sleeve is inserted into the core fixing sleeve, a top radial extension portion is formed on the top inner side wall of the core fixing sleeve, the inner side wall of the top radial extension portion is tightly attached to the middle outer side wall of the sliding connection sleeve, and the top surface of the annular extension portion is pressed against the bottom surface of the top radial extension portion;

[0008] The middle part of the hub of the wheel hub to be processed is on the top surface of the positioning core, and the bottom inner side wall of the central through hole formed in the middle part of the hub of the wheel hub is a conical wall surface, which is pressed against and matched with the conical side wall of the positioning core.

[0009] The core seat comprises a lower sleeve body, a radially extending edge is formed on the bottom outer wall of the lower sleeve body, the radially extending edge is pressed against the top surface of the table plate and is fixedly connected to the top surface of the table plate by a plurality of bolts;

[0010] A vertical column extending upward is formed in the middle of the top plate of the lower casing body.

[0011] A lower positioning cylindrical block is fixed in the middle of the bottom surface of the lower concave hole, and the lower positioning cylindrical block is inserted into the lower part of the compression spring.

[0012] An upper groove is formed in the middle of the top end surface of the sliding connection sleeve, and the top end of the compression spring is inserted into the upper groove, and its top end surface is pressed against the top surface of the upper groove.

[0013] An annular support block is fixed to the edge of the top surface of the table plate, and the central axis of the annular support block coincides with the central axis of the positioning core.

[0014] An annular protrusion is formed on the top surface of the middle part of the annular support block, and a top annular protrusion is formed on the outer side of the top surface of the annular protrusion.

[0015] The bottom surface of the bottom wheel flange of the wheel hub is pressed against the top surface of the annular protrusion, and the outer side wall of the bottom wheel flange is closely attached to the inner side wall of the top annular protrusion.

[0016] A plurality of mounting through holes are formed on the top surface of the outer side of the annular support block, and all the mounting through holes are evenly distributed on the top surface of the outer side of the annular support block with the central axis of the annular support block as the center. The rotary pressing cylinder is inserted into the corresponding mounting through holes, and the bottom surface of the outer side of the top of the rotary pressing cylinder is fixed on the top surface of the annular support block. A pressing block is fixed on the top of the pressing rod of the rotary pressing cylinder, and an anti-slip pressing block is fixed on the bottom surface of the inner end of the pressing block, and the bottom surfaces of all the anti-slip pressing blocks are pressed against the top surface of the bottom rim of the wheel hub.

[0017] An outer annular protective sleeve is inserted on the outer side wall of the core fixing sleeve, and an annular plate portion extending horizontally and radially is formed on the outer side wall of the bottom end of the outer annular protective sleeve, the outer side wall of the annular plate portion is tightly attached to the inner side wall of the annular protrusion, and the outer bottom surface of the annular plate portion is pressed against the top surface of the inner side of the annular support block;

[0018] An annular groove is formed in the middle of the top surface of the annular plate portion, and the inner side walls at the outer side and the inner side of the annular groove are both conical wall surfaces, the upper parts of the two inner side walls of the annular groove are far away from each other, and the lower parts are close to each other, and the bottom surface of the annular groove is formed with a lower annular groove extending downward, and the first annular material receiving trough body is inserted into the lower annular groove, and the outer side walls of the outer side and the inner side of the first annular material receiving trough body are closely attached to or close to the outer side walls of the lower annular groove and the bottom surface of the first annular material receiving trough body is pressed against the bottom surface of the lower annular groove;

[0019] A plurality of blanking through holes extending downward are formed on the bottom surface of the lower annular groove, the upper portion of the guide sleeve is located in the corresponding blanking through holes, the upper outer wall of the guide sleeve is welded and fixed to the inner wall of the corresponding blanking through hole, and the lower portion of the guide sleeve is inserted into the corresponding lower vertical through hole formed on the table plate;

[0020] The bottom surface of the bottom plate of the first annular material receiving trough body is formed with a plurality of annular screw-jointed sleeves, and the bottom plate of the first annular material receiving trough body corresponding to the annular screw-jointed sleeves is formed with a plurality of filtering through holes, and the annular screw-jointed sleeves are inserted into the corresponding guide sleeves;

[0021] The lower part of the annular threaded sleeve body is threaded with a filter connection sleeve, the bottom end of which is fixed with a filter sleeve made of a filter screen, the bottom plate and side wall of the filter sleeve are both formed with filter mesh holes, and the filter connection sleeve and the filter sleeve are inserted into the guide sleeve;

[0022] A liquid guide hole is formed on the top surface of the machining center mounting base plate corresponding to the lower vertical through hole, and all the liquid guide holes are communicated with the inner cavity formed in the middle of the inner portion of the machining center mounting base plate, and a plurality of drainage through holes extending outward are formed on the side wall of the inner cavity, and the inner end of the drainage connector is located in the corresponding drainage through hole, and the outer side wall of the inner end of the drainage connector is welded and fixed to the inner side wall of the corresponding drainage through hole;

[0023] An inner radial ring is formed on the lower inner wall of the liquid guide hole, the lower part of the elastic sealing liquid guide sleeve is clamped in the corresponding liquid guide hole, the bottom surface of the elastic sealing liquid guide sleeve is pressed against the top surface of the corresponding inner radial ring, the top of the elastic sealing liquid guide sleeve extends out of the top surface of the machining center mounting base plate and is pressed against the bottom surface of the table plate, and the lower vertical through hole is communicated with the corresponding elastic sealing liquid guide sleeve.

[0024] The outstanding effects of the present invention are:

[0025] The conical side wall of its positioning core cooperates with the inner wall of the bottom end of the central through hole formed in the middle of the hub of the wheel hub to be processed, realizing automatic centering, so that it can meet the processing centering function of the wheel hub of similar size and is suitable for the processing of mixed batch products of similar size.

[0026] At the same time, it can allow the coolant and chips in the wheel hub after the hub is drilled to enter the first annular material receiving trough and achieve secondary filtration through the filter holes and the filter sleeve, thereby ensuring the filtration and centralized collection of the chips and facilitating subsequent dumping processing. Description of the drawings:

[0027] Figure 1 It is a partial structural schematic diagram of the present invention;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the first location;

[0029] Figure 3 yes Figure 1 A partial enlarged view of the second location;

[0030] Figure 4 It is a partial top view of components such as the table top and the annular support block. Specific implementation method:

[0031] For example, see Figures 1 to 4 As shown, an elastic positioning tool for a wheel hub machining processing center includes a machining center mounting base plate 10, which is a component installed in the machining center and will not be described in detail here; a table plate 20 is fixed on the top surface of the machining center mounting base plate 10, a core seat 30 is fixed in the middle of the top surface of the table plate 20, a vertical column 31 extending upward is formed in the middle of the upper part of the core seat 30, a lower concave hole 32 is formed in the middle of the top surface of the vertical column 31, a lower part of a compression spring 33 is inserted into the lower concave hole 32, and the bottom end of the compression spring 33 is pressed against the bottom surface of the lower concave hole 32, a sliding connection sleeve 34 is inserted into the upper part of the vertical column 31, the inner side wall of the sliding connection sleeve 34 is tightly against the outer side wall of the vertical column 31, and the top end of the compression spring 33 is pressed against the bottom surface of the top plate of the sliding connection sleeve 34;

[0032] A positioning core 40 with a tapered outer wall is fixed on the top surface of the sliding connection sleeve 34, and an annular extension portion 35 is formed on the lower outer wall of the sliding connection sleeve 34;

[0033] The core fixing sleeve 50 is fixed on the core seat 30, and the sliding connection sleeve 34 is inserted into the core fixing sleeve 50. A top radial extension portion 51 is formed on the top inner side wall of the core fixing sleeve 50. The inner side wall of the top radial extension portion 51 is in close contact with the middle outer side wall of the sliding connection sleeve 34, and the top surface of the annular extension portion 35 is pressed against the bottom surface of the top radial extension portion 51.

[0034] The middle of the hub of the wheel hub 100 to be processed is located on the top surface of the positioning core 40, and the inner side wall of the bottom end of the central through hole formed in the middle of the hub of the wheel hub 100 is a tapered wall surface, which is pressed against and matched with the tapered side wall of the positioning core 40. With this structure, when replacing wheel hubs 100 of different specifications (also requiring wheel hubs 100 within a certain size range, such as 15 to 17 inches, that is, similar wheel hubs 100) for processing, it is only necessary to press the inner side wall of the bottom end of the central through hole formed in the middle of the hub of the wheel hub 100 against the tapered side wall of the positioning core 40 (only the two can cooperate and press against each other, and they can be automatically aligned), and automatic center alignment can be achieved.

[0035] Furthermore, the core seat 30 includes a lower casing body portion, and a radially extending edge 350 is formed on the bottom outer wall of the lower casing body portion, and the radially extending edge 350 is pressed against the top surface of the table plate 20 and fixedly connected to the top surface of the table plate 20 by a plurality of bolts;

[0036] A vertical column 31 extending upward is formed in the middle of the top plate of the lower casing body, and the bottom surface of the sliding connection sleeve 34 faces the top surface of the edge of the top plate of the lower casing body.

[0037] Furthermore, a lower positioning cylindrical block 321 is fixed in the middle of the bottom surface of the lower concave hole 32 , and the lower positioning cylindrical block 321 is inserted into the lower part of the compression spring 33 .

[0038] Furthermore, an upper groove is formed in the middle of the top end surface of the sliding connection sleeve 34, and the top end of the compression spring 33 is inserted into the upper groove, and its top end surface is pressed against the top surface of the upper groove.

[0039] Furthermore, an annular support block 60 is fixed to the edge of the top surface of the platform 20 , and the central axis of the annular support block 60 coincides with the central axis of the positioning core 40 .

[0040] Furthermore, an annular protrusion 61 is formed on the top surface of the middle portion of the annular support block 60 , and a top annular protrusion 62 is formed on the outer side of the top surface of the annular protrusion 61 .

[0041] Furthermore, the bottom surface of the bottom rim of the wheel hub 100 is pressed against the top surface of the annular protrusion 61 , and the outer side wall of the bottom rim is tightly attached to the inner side wall of the top annular protrusion 62 .

[0042] Furthermore, a plurality of mounting through holes are formed on the top surface of the outer side of the annular support block 60, and all the mounting through holes are evenly distributed on the top surface of the outer side of the annular support block 60 with the central axis of the annular support block 60 as the center. The rotary clamping cylinder 63 is inserted into the corresponding mounting through holes, and the bottom surface of the outer portion of the top of the rotary clamping cylinder 63 is fixed on the top surface of the annular support block 60, and a clamping block 64 is fixed on the top end of the clamping rod of the rotary clamping cylinder 63, and an anti-slip clamping block 65 is fixed on the bottom surface of the inner end of the clamping block 64, and the bottom surfaces of all anti-slip clamping blocks 65 are pressed against the top surface of the bottom rim of the wheel hub 100.

[0043] An outer annular protective sleeve 70 is inserted on the outer side wall of the core fixing sleeve 50, and an annular plate portion 71 extending horizontally and radially is formed on the outer side wall of the bottom end of the outer annular protective sleeve 70. The outer side wall of the annular plate portion 71 is tightly attached to the inner side wall of the annular protrusion 61, and the outer bottom surface of the annular plate portion 71 is pressed against the top surface of the inner side of the annular support block 60.

[0044] An annular groove 72 is formed in the middle of the top surface of the annular plate portion 71. The inner side walls of the outer side and the inner side of the annular groove 72 are both conical wall surfaces. The upper parts of the two inner side walls of the annular groove 72 are far away from each other and the lower parts are close to each other. The bottom surface of the annular groove 72 is formed with a lower annular groove 73 extending downward. The first annular material receiving trough body 80 is inserted into the lower annular groove 73. The outer side walls of the first annular material receiving trough body 80 are closely attached to or close to the outer side walls of the lower annular groove 73. The bottom surface of the first annular material receiving trough body 80 is pressed against the bottom surface of the lower annular groove 73.

[0045] A plurality of downwardly extending blanking through holes 74 are formed on the bottom surface of the lower annular groove 73, the upper portion of the guide sleeve 75 is located in the corresponding blanking through hole 74, the upper outer wall of the guide sleeve 75 is welded and fixed to the inner wall of the corresponding blanking through hole 74, and the lower portion of the guide sleeve 75 is inserted into the corresponding lower vertical through hole 21 formed on the table 20;

[0046] The inner side wall of the outer annular protective sleeve 70 is formed with a plurality of inner annular grooves, the first sealing ring 1 is nested in the corresponding inner annular grooves, and the inner side wall of the first sealing ring 1 is pressed against the outer side wall of the core fixing sleeve 50;

[0047] The second sealing ring 2 is embedded in the annular groove formed in the middle of the outer wall of the annular plate portion 71, and the outer wall of the second sealing ring 2 is pressed against the inner wall of the annular protrusion 61;

[0048] The third sealing ring 3 is nested in the annular groove formed on the inner wall of the lower vertical through hole 21 , and the lower outer wall of the guide sleeve 75 is pressed against the corresponding inner wall of the third sealing ring 3 .

[0049] The bottom surface of the bottom plate of the first annular material receiving trough body 80 is formed with a plurality of annular screw-jointed sleeves 81, and the bottom plate of the first annular material receiving trough body 80 corresponding to the annular screw-jointed sleeves 81 is formed with a plurality of filtering through holes 82, and the annular screw-jointed sleeves 81 are inserted into the corresponding guide sleeves 75;

[0050] A filter connection sleeve 82 is threadedly connected to the lower part of the annular threaded sleeve body 81, and a filter sleeve 83 made of a filter mesh is fixed to the bottom end of the filter connection sleeve 82. The bottom plate and side wall of the filter sleeve 83 are both formed with filter mesh holes. The filter connection sleeve 82 and the filter sleeve 83 are inserted into the guide sleeve 75; the aperture of the filter through hole 82 is larger than the filter mesh holes on the bottom plate and side wall of the filter sleeve 83.

[0051] Furthermore, a liquid guide hole 11 is formed on the top surface of the machining center mounting base plate 10 corresponding to the lower vertical through hole 21, and all the liquid guide holes 11 are communicated with the inner cavity 12 formed in the middle of the inner portion of the machining center mounting base plate 10, and a plurality of drainage through holes extending outward are formed on the side wall of the inner cavity 12, and the inner end of the drainage connector 13 is located in the corresponding drainage through hole, and the outer side wall of the inner end of the drainage connector 13 is welded and fixed to the inner side wall of the corresponding drainage through hole;

[0052] An inner radial ring is formed on the lower inner wall of the liquid guiding hole 11, and the lower part of the elastic sealing liquid guiding sleeve 14 is clamped in the corresponding liquid guiding hole 11, and the bottom surface of the elastic sealing liquid guiding sleeve 14 is pressed against the top surface of the corresponding inner radial ring. The top of the elastic sealing liquid guiding sleeve 14 extends out of the top surface of the machining center mounting base plate 10 and is pressed against the bottom surface of the table plate 20, and the lower vertical through hole 21 is communicated with the corresponding elastic sealing liquid guiding sleeve 14.

[0053] Furthermore, an annular limiting raised ring is formed on the bottom surface of the table plate 20 around the bottom end of the lower vertical through hole 21, the top of the elastic sealing liquid guiding sleeve 14 is in the corresponding annular limiting raised ring, and the top outer wall of the elastic sealing liquid guiding sleeve 14 is pressed against the inner wall of the corresponding annular limiting raised ring.

[0054] When the present embodiment is used, the wheel hub 100 to be processed is first placed on the positioning core 40, the bottom surface of the bottom rim of the wheel hub 100 is pressed against the top surface of the annular protrusion 61, and the outer wall of the bottom rim is tightly against the inner wall of the top annular protrusion 62. At the same time, the inner wall of the bottom end of the central through hole formed in the middle of the hub portion of the wheel hub 100 is a conical wall surface, which is pressed against and matched with the conical side wall of the positioning core 40. At this time, through the elastic action of the compression spring 33, the conical side wall of the positioning core 40 is pressed upward against the inner wall of the bottom end of the central through hole formed in the middle of the hub portion of the wheel hub 100, so as to realize automatic centering.

[0055] When a wheel hub 100 of a small size is installed, the inner side wall of the bottom end of the central through hole formed in the middle of the hub portion of the wheel hub 100 presses against the conical side wall of the positioning core 40 and cooperates with the conical side wall, which can automatically align the center. At this time, the outer side wall of the bottom rim may not rest against the inner side wall of the top annular protrusion 62, but it does not affect its centering. Subsequently, the clamping rods of all rotating clamping cylinders 63 are rotated and clamped, so that the bottom surface of the anti-slip clamping block 65 is pressed against the top surface of the bottom rim of the wheel hub 100 to achieve clamping and fixing. The bottom surface area of ​​the anti-slip clamping block 65 is large, which can ensure the clamping effect.

[0056] This embodiment can be used to install and process wheel hubs 100 of similar sizes. For example, wheel hubs 100 of similar sizes, such as 15-inch to 17-inch, can all use the present embodiment with a positioning core 40 of the same specification to perform positioning and installation of the similar wheel hub 100 for processing. Wheel hubs 100 exceeding this range need to be replaced with the present embodiment with a positioning core 40 of a corresponding size range for structural installation and use.

[0057] After compaction, the PCD hole on the hub of the wheel hub 100 can be processed by a machining center. During the processing, a large amount of cutting fluid and chips will fall into the annular groove 72. The chips and cutting fluid enter the first annular receiving trough 80 along the annular groove 72, and the large particles of chips are filtered through the filtering through hole 82.

[0058] Then, it enters the filter sleeve 83 for secondary filtration. The filtered cutting fluid enters the inner cavity 12 along the elastic sealing liquid guide sleeve 14, and then flows to the connecting pipe connected to the drainage connector 13 along the drainage connector 13, and is discharged from the connecting pipe to the corresponding material receiving box. It is very convenient, and its multi-stage filtration can ensure that the cutting fluid in the wheel hub 100 can be discharged normally without accumulation, which is convenient for handling.

[0059] After a certain period of use, the first annular material receiving trough body 80 and other components can be lifted upward and taken out from the annular plate portion 71, and the waste cuttings therein can be dumped and cleaned, which is very convenient.

Claims

1. An elastic positioning tool for a machining center for wheel hub machining, comprising a machining center mounting base plate (10), characterized in that: A table plate (20) is fixed on the top surface of the machining center mounting base plate (10), a core seat (30) is fixed in the middle of the top surface of the table plate (20), a vertical column (31) extending upward is formed in the middle of the upper part of the core seat (30), a lower concave hole (32) is formed in the middle of the top surface of the vertical column (31), the lower part of the compression spring (33) is inserted into the lower concave hole (32), the bottom end of the compression spring (33) is pressed against the bottom surface of the lower concave hole (32), the upper part of the vertical column (31) is inserted into a sliding connection sleeve (34), the inner side wall of the sliding connection sleeve (34) is tightly attached to the outer side wall of the vertical column (31), and the top end of the compression spring (33) is pressed against the bottom surface of the top plate of the sliding connection sleeve (34); A positioning core (40) having a tapered outer wall is fixed on the top surface of the sliding connection sleeve (34), and an annular extension portion (35) is formed on the lower outer wall of the sliding connection sleeve (34); The core fixing sleeve (50) is fixed on the core seat (30), the sliding connection sleeve (34) is inserted into the core fixing sleeve (50), a top radial extension portion (51) is formed on the top inner side wall of the core fixing sleeve (50), the inner side wall of the top radial extension portion (51) is tightly attached to the middle outer side wall of the sliding connection sleeve (34), and the top surface of the annular extension portion (35) is pressed against the bottom surface of the top radial extension portion (51); The middle part of the hub of the wheel hub (100) to be processed is located on the top surface of the positioning core (40), and the inner side wall of the bottom end of the central through hole formed in the middle part of the hub of the wheel hub (100) is a conical wall surface, which is pressed against the conical side wall of the positioning core (40) and matched with the conical side wall.

2. The elastic positioning tool for a wheel hub machining center according to claim 1, characterized in that: The core seat (30) comprises a lower casing body, a radially extending edge (350) is formed on the bottom outer wall of the lower casing body, the radially extending edge (350) is pressed against the top surface of the table plate (20) and is fixedly connected to the top surface of the table plate (20) by a plurality of bolts; A vertical column (31) extending upward is formed in the middle of the top plate of the lower casing.

3. The elastic positioning tool for a wheel hub machining center according to claim 1, characterized in that: A lower positioning cylindrical block (321) is fixed in the middle of the bottom surface of the lower concave hole (32), and the lower positioning cylindrical block (321) is inserted into the lower part of the compression spring (33).

4. The elastic positioning tool for a wheel hub machining center according to claim 1, characterized in that: An upper groove is formed in the middle of the top end surface of the sliding connection sleeve (34), and the top end of the compression spring (33) is inserted into the upper groove, and its top end surface is pressed against the top surface of the upper groove.

5. The elastic positioning tool for a wheel hub machining center according to claim 1, characterized in that: An annular support block (60) is fixed to the edge of the top surface of the platform (20), and the central axis of the annular support block (60) coincides with the central axis of the positioning core (40).

6. The elastic positioning tool for a wheel hub machining center according to claim 5, characterized in that: An annular protrusion (61) is formed on the top surface at the middle of the annular support block (60), and a top annular protrusion (62) is formed on the outer side of the top surface of the annular protrusion (61).

7. The elastic positioning tool for a wheel hub machining center according to claim 6, characterized in that: The bottom surface of the bottom rim of the wheel hub (100) is pressed against the top surface of the annular protrusion (61), and the outer side wall of the bottom rim is tightly attached to the inner side wall of the top annular protrusion (62).

8. The elastic positioning tool for a wheel hub machining center according to claim 7, characterized in that: The top surface of the outer side of the annular support block (60) is formed with a plurality of mounting through holes, and all mounting through holes are evenly distributed on the top surface of the outer side of the annular support block (60) with the central axis of the annular support block (60) as the center. The rotary clamping cylinder (63) is inserted into the corresponding mounting through hole, and the bottom surface of the outer side of the top of the rotary clamping cylinder (63) is fixed on the top surface of the annular support block (60). A clamping block (64) is fixed on the top end of the clamping rod of the rotary clamping cylinder (63), and an anti-skid clamping block (65) is fixed on the bottom surface of the inner end of the clamping block (64). The bottom surfaces of all anti-skid clamping blocks (65) are pressed against the top surface of the bottom rim of the wheel hub (100). An outer annular protective sleeve (70) is inserted on the outer side wall of the core fixing sleeve (50), and an annular plate portion (71) extending horizontally and radially is formed on the outer side wall of the bottom end of the outer annular protective sleeve (70), the outer side wall of the annular plate portion (71) is tightly attached to the inner side wall of the annular protrusion (61), and the outer bottom surface of the annular plate portion (71) is pressed against the top surface of the inner side of the annular support block (60); An annular groove (72) is formed in the middle of the top surface of the annular plate portion (71), and the inner side walls at the outer side and the inner side of the annular groove (72) are both conical wall surfaces, and the upper parts of the two inner side walls of the annular groove (72) are separated from each other and the lower parts are close to each other. A lower annular groove (73) extending downward is formed on the bottom surface of the annular groove (72), and the first annular material receiving trough body (80) is inserted into the lower annular groove (73), and the outer side walls of the outer side and the inner side of the first annular material receiving trough body (80) are closely attached to or close to the outer side walls and the inner side walls of the lower annular groove (73), and the bottom surface of the first annular material receiving trough body (80) is pressed against the bottom surface of the lower annular groove (73); A plurality of downwardly extending blanking through holes (74) are formed on the bottom surface of the lower annular groove (73), the upper portion of the guide sleeve (75) is located in the corresponding blanking through hole (74), the upper outer wall of the guide sleeve (75) is welded and fixed to the inner wall of the corresponding blanking through hole (74), and the lower portion of the guide sleeve (75) is inserted into the corresponding lower vertical through hole (21) formed on the table (20); A plurality of inner annular grooves are formed on the inner side wall of the outer annular protective sleeve (70), the first sealing ring (1) is nested in the corresponding inner annular grooves, and the inner side wall of the first sealing ring (1) is pressed against the outer side wall of the core fixing sleeve (50); A second sealing ring (2) is embedded in an annular groove formed in the middle of the outer side wall of the annular plate portion (71), and the outer side wall of the second sealing ring (2) is pressed against the inner side wall of the annular protrusion (61); A third sealing ring (3) is nested in an annular groove formed on the inner wall of the lower vertical through hole (21), and the lower outer wall of the guide sleeve (75) is pressed against the corresponding inner wall of the third sealing ring (3). A plurality of annular threaded sleeves (81) are formed on the bottom surface of the bottom plate of the first annular material receiving trough body (80), a plurality of filtering through holes (82) are formed on the bottom plate of the first annular material receiving trough body (80) corresponding to the annular threaded sleeves (81), and the annular threaded sleeves (81) are inserted into the corresponding guide sleeves (75); The lower part of the annular threaded sleeve body (81) is threadedly connected with a filter connection sleeve (82), the bottom end of the filter connection sleeve (82) is fixed with a filter sleeve (83) made of a filter screen, the bottom plate and side wall of the filter sleeve (83) are both formed with filter mesh holes, and the filter connection sleeve (82) and the filter sleeve (83) are inserted into the guide sleeve (75); A liquid guide hole (11) is formed on the top surface of the machining center mounting base plate (10) corresponding to the lower vertical through hole (21), and all the liquid guide holes (11) are communicated with an inner cavity (12) formed in the middle of the inner portion of the machining center mounting base plate (10). A plurality of liquid discharge through holes extending outward are formed on the side wall of the inner cavity (12), and the inner end of the liquid discharge connector (13) is located in the corresponding liquid discharge through hole, and the outer wall of the inner end of the liquid discharge connector (13) is welded and fixed to the inner wall of the corresponding liquid discharge through hole; An inner radial ring is formed on the lower inner wall of the liquid guide hole (11); the lower part of the elastic sealing liquid guide sleeve (14) is clamped in the corresponding liquid guide hole (11); the bottom surface of the elastic sealing liquid guide sleeve (14) is pressed against the top surface of the corresponding inner radial ring; the top of the elastic sealing liquid guide sleeve (14) extends out of the top surface of the machining center mounting base plate (10) and is pressed against the bottom surface of the table plate (20); and the lower vertical through hole (21) is communicated with the corresponding elastic sealing liquid guide sleeve (14). An annular limiting raised ring is formed on the bottom surface of the table plate (20) around the bottom end of the lower vertical through hole (21), the top of the elastic sealing liquid guiding sleeve (14) is located in the corresponding annular limiting raised ring, and the top outer wall of the elastic sealing liquid guiding sleeve (14) is pressed against the inner wall of the corresponding annular limiting raised ring.

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