High-precision drilling machine for machining automobile hub large disc

Abstract

The utility model discloses a high-precision drilling machine for machining an automobile hub large disc, which comprises a machining table and a drilling mechanism, the center of the machining table is provided with a central positioning column, the machining table is provided with a plurality of restoration assemblies around the central positioning column, the restoration assemblies are slidably mounted on the machining table, and the distances between the restoration assemblies and the central positioning column are the same; the drilling mechanism comprises a lifting table mounted on the lifting frame and a rotary table mounted on the lifting table, the center of the rotary table vertically corresponds to the center of the central positioning column, a plurality of drilling assemblies distributed around the center of the rotary table are arranged on the rotary table, and the distances between the drilling assemblies and the center of the rotary table are the same; the drilling assembly is driven by the movable adjusting mechanism to adjust the distance between the drilling assembly and the center of the rotary table, and the drilling assembly is detachably connected with the movable adjusting mechanism. The automatic drilling machine can achieve automatic high-precision drilling operation, is high in efficiency, saves time and labor, guarantees product quality, and eliminates potential safety hazards existing in manual operation at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to a high-precision drilling machine for processing automobile wheel hub discs. Background Art

[0002] The original drilling equipment requires manual cooperation from the operator when used. The operator manually starts the fixture to clamp the workpiece, and then manually starts the drilling tool to drill prefabricated holes on the workpiece. This operation method mainly relies on manual control of product quality. It is not only inefficient, time-consuming and labor-intensive, but also prone to errors. The drilling accuracy cannot be guaranteed, affecting the yield rate, and there are certain safety hazards. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-precision drilling machine for processing automobile wheel hub discs, aiming to solve the technical problems existing in the prior art that the traditional drilling method relies on manual control of product quality, is inefficient, time-consuming and labor-intensive, the drilling accuracy cannot be guaranteed, the yield rate is affected, and there are certain safety hazards.

[0004] The technical solution of the utility model is: a high-precision drilling machine for processing large automobile wheel hub discs, comprising a processing table and a drilling mechanism, a center positioning column for positioning and installing a workpiece is provided at the center of the processing table, a plurality of alignment components are provided around the center positioning column, each of the alignment components is slidably installed on the processing table, and the distance between each alignment component and the center positioning column is the same, and after the workpiece is positioned and installed on the center positioning column, it is aligned and fixed by the plurality of alignment components; the drilling mechanism comprises a lifting table installed on a lifting frame, and a turntable installed on the lifting table, the center of the turntable corresponds to the center of the center positioning column up and down, the turntable is provided with a plurality of drilling components distributed around the center thereof, the distance between each drilling component and the center of the turntable is the same, the drilling component is driven by a movable adjustment mechanism to adjust the spacing between the drilling component and the center of the turntable, and the drilling component is detachably connected to the movable adjustment mechanism.

[0005] Furthermore, the utility model comprises four return components which are distributed in a cross shape, and two opposite return components form a group, and the two groups of return components are driven by a first drive mechanism and a second drive mechanism respectively; the first drive mechanism comprises a first screw having forward and reverse thread segments driven by a first motor, a first forward connecting block and a first reverse connecting block respectively connected to the forward and reverse thread segments of the first screw, and the first forward connecting block and the first reverse connecting block are respectively connected to two return components of the same group; the second drive mechanism comprises a second screw having forward and reverse thread segments driven by a second motor, a second forward connecting block and a second reverse connecting block respectively connected to the forward and reverse thread segments of the second screw, and the second forward connecting block and the second reverse connecting block are respectively connected to two return components of another group.

[0006] Furthermore, in the utility model, the first screw and the second screw are distributed up and down, a cavity is provided in the processing table, both screws pass through the cavity and are rotatably installed in the processing table through a rotating seat, the first motor and the second motor are connected to the outside of the processing table, and the motor output shafts of the two motors are respectively inserted into the processing table and connected to the corresponding screws.

[0007] Furthermore, the correction component described in the utility model includes a correction seat, a groove is opened inside the correction seat, and an opening connected to the groove is provided on the inner side of the correction seat; the bottom of the groove has a boss, a pressure sensor is installed in the boss, a spring is provided around the boss in the groove, a detection plate connected to the spring is installed at the opening, the front end of the detection plate extends out of the opening, and the rear end is provided with a contact for triggering the pressure sensor; a pressure block is installed on the top of the correction seat through a limiting guide seat, and the pressure block is driven by a clamping cylinder to lift and lower the workpiece, and the clamping cylinder is installed on the outside of the correction seat through a protective shell.

[0008] Furthermore, the upper surface of the processing table in the utility model is provided with a slide groove corresponding to each of the return components, the return seat is slidably installed in the slide groove, the slide groove is connected with the cavity, and the corresponding connecting blocks on each screw rod are respectively passed into the corresponding slide groove and connected with the corresponding return seat.

[0009] Furthermore, the utility model provides two lifting frames at intervals, each of which is provided with a screw rod driven to rotate by a lifting motor, the two ends of the lifting platform are respectively inserted into the two lifting frames and threadedly connected to the screw rod, and the lifting platform is provided with a rotating motor connected to drive the turntable to rotate.

[0010] Furthermore, the drilling assembly in the utility model has two symmetrically arranged about the center of the turntable, each drilling assembly includes a drill rod driven by a drilling motor, a connecting seat connected to the top of the drilling motor, the connecting seat includes a connecting seat body, a T-shaped joint connected to the top of the connecting seat body, and a bumper plate connected to one side of the connecting seat body, and a locking threaded hole is opened on the bumper plate.

[0011] Furthermore, the movable adjustment mechanism in the utility model includes an adjustment screw with positive and negative threaded sections driven by a displacement motor, and two adjustment seats respectively connected to the positive and negative threaded sections of the adjustment screw, each of the adjustment seats includes an adjustment seat body, a connecting head connected to the top of the adjustment seat body, and a T-slot opened at the bottom of the adjustment seat body, the connecting head is provided with a connecting threaded hole for connecting to the adjustment screw, the T-slot is plugged into the T-joint, and the bump plate is locked with the adjustment seat body by screws.

[0012] Furthermore, the turntable in the utility model is provided with an installation cavity, the adjustment screw is rotatably installed in the installation cavity, the displacement motor is connected to the outside of the turntable, and the motor output shaft of the displacement motor is inserted into the installation cavity and connected to the adjustment screw; two installation ports connected to the installation cavity are opened on the bottom surface of the turntable, and the connecting heads of the two adjustment seats are respectively inserted into the installation cavity through the two installation ports and connected to the adjustment screws, and the adjustment seat bodies of the two adjustment seats are located on the outside of the two installation ports.

[0013] Compared with the prior art, the utility model has the following advantages: when processing automobile wheel hub discs, the worker only needs to align the workpiece with the center positioning column and insert it, and place it on the processing table. Before drilling, the workpiece will be pre-aligned and positioned through the cooperation of multiple alignment components so that it is located in the center of the processing table to ensure drilling accuracy. The alignment components can also press down and fix the workpiece to avoid movement during drilling; the drilling components are detachable in design, and one or two can be installed according to the number of holes to be drilled to improve drilling efficiency. The installation of the drilling components adopts a plug-in method and is locked and fixed with screws. It is easy to disassemble and maintain, and its position relative to the center of the turntable can be adjusted through a mobile adjustment mechanism to adapt to different drilling positions; the drilling machine of the utility model can realize automated high-precision drilling operations, with high efficiency, saving time and effort, ensuring product quality while eliminating the safety hazards of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a top view of the processing table described in the utility model;

[0016] Figure 3 for Figure 2 AA section view;

[0017] Figure 4 It is a schematic diagram of the specific structure of the drilling assembly described in the utility model;

[0018] Figure 5 It is a schematic diagram of the specific installation structure of the mobile adjustment mechanism described in the utility model;

[0019] Figure 6 It is a schematic diagram of the specific structure of the adjustment seat described in the utility model;

[0020] Figure 7 This is a schematic diagram of the installation of the drilling assembly described in the utility model;

[0021] Figure 8 for Figure 3 A partial enlarged schematic diagram of part D in the middle.

[0022] in:

[0023] 1. Center positioning column;

[0024] 2. Return assembly; 2a. Return seat; 2b. Pressure sensor; 2c. Spring; 2d. Detection plate; 2e. Limit guide seat; 2f. Press block; 2g. Press cylinder; 2h. Protective shell; 2i. Groove; 2j. Boss;

[0025] 3. First driving mechanism; 3a. First motor; 3b. First screw rod; 3c. First forward connecting block; 3d. First reverse connecting block;

[0026] 4. Second driving mechanism; 4a. Second screw rod; 4b. Second reverse connecting block;

[0027] 5. Rotating seat;

[0028] 6. Lifting frame; 6a. Lifting motor; 6b. Screw rod;

[0029] 7. Lifting platform;

[0030] 8. Rotate the motor;

[0031] 9. Turntable; 9a. Mounting cavity; 9b. Mounting opening;

[0032] 10. Drilling assembly; 101. Drilling motor; 102. Drill rod; 103. Connecting seat; 103a. Connecting seat body; 103b. T-shaped joint; 103c. Bumper plate; 103d. Locking threaded hole;

[0033] 11. Mobile adjustment mechanism; 111. Displacement motor; 112. Adjustment screw; 113. Adjustment seat; 113a. Adjustment seat body; 113b. Connector; 113c. T-slot; 113d. Connecting threaded hole;

[0034] 12. Screws;

[0035] A. Processing table; A 0 , cavity; A 1 , chute;

[0036] B. Drilling mechanism;

[0037] C. Workpiece. DETAILED DESCRIPTION

[0038] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0039] Example:

[0040] The accompanying drawings show a specific implementation of the utility model of a high-precision drilling machine for processing a large disc of an automobile wheel hub, as shown in FIG. Figure 1 It mainly includes a processing table A and a drilling mechanism B. The processing table A is used to place a workpiece C and to align, position and fix it. The drilling mechanism B is used to drill holes in the workpiece C.

[0041] Combination Figures 1 to 3 A center positioning column 1 is provided at the center of the processing table A. The center positioning column 1 is used to cooperate with the center hole of the workpiece C. The center hole is aligned with the center positioning column 1 and inserted, so that the initial positioning of the workpiece C on the processing table A can be achieved.

[0042] A plurality of alignment components 2 are arranged around the central positioning column 1 on the processing table A. The plurality of alignment components 2 are used to cooperate in further positioning the workpiece C so that the workpiece C is located at the center of the processing table A.

[0043] In this embodiment, there are four return components 2, which are distributed in a cross shape, and two opposite return components 2 form a group. The two groups of return components 2 are driven by the first driving mechanism 3 and the second driving mechanism 4 respectively. Figure 3The first driving mechanism 3 specifically includes a first screw rod 3b with forward and reverse thread segments driven by a first motor 3a, a first forward connection block 3c and a first reverse connection block 3d respectively connected to the forward and reverse thread segments of the first screw rod 3b, and the first forward connection block 3c and the first reverse connection block 3d are respectively connected to two return assemblies 2 of the same group. The second driving mechanism 4 is actually the same in structure as the first driving mechanism 3. The second driving mechanism 4 includes a second screw rod 4a with forward and reverse thread segments driven by a second motor, a second forward connection block and a second reverse connection block 4b respectively connected to the forward and reverse thread segments of the second screw rod 4a, and the second forward connection block and the second reverse connection block 4b are respectively connected to two return assemblies 2 of another group. The distances between the four return assemblies 2 and the center positioning column 1 are the same. Under the synchronous drive of the first driving mechanism 3 and the second driving mechanism 4, the four return assemblies 2 can synchronously approach or move away from the center positioning column 1 and always keep the same distance with the center positioning column 1, so that the workpiece C can be accurately positioned at the center position of the processing table A.

[0044] The first drive mechanism 3 and the second drive mechanism 4 are specifically installed as follows: a cavity A is provided in the processing table A. 0 The first screw 3b and the second screw 4a are both arranged in the cavity A. 0 The two ends of the two screws are rotatably mounted in the processing table A through the rotating seat 5, and the first screw 3b and the second screw 4a are distributed up and down, and do not affect each other when rotating. The first motor 3a driving the first screw 3b and the second motor driving the second screw 4a are connected to the outside of the processing table A, and the two motors are partially installed in the processing table A, and the motor output shafts of the two motors are inserted into the rotating seat 5 and connected to one end of the corresponding screw.

[0045] The specific installation of the return assembly 2 is that the return assembly 2 includes a return seat 2a as a main body, and the upper surface of the processing table A is provided with a slide groove A corresponding to each return assembly 2. 1 , the return seat 2a is slidably installed in the slide groove A 1 Inner, chute A 1 With cavity A 0 Connected, the corresponding connecting blocks on each screw rod are respectively passed through the corresponding slide groove A 1 In this embodiment, since the first screw rod 3b and the second screw rod 4a are arranged up and down, and the second screw rod 4a is at a lower position, the longitudinal lengths of the second positive connection block and the second reverse connection block 4b on the second screw rod 4a are longer than the longitudinal lengths of the first positive connection block 3c and the first reverse connection block 3d on the first screw rod 3b, and the four connection blocks can respectively drive the four return seats 2a along the slide groove A. 1 slide.

[0046] The specific structure of the correction component 2 is as follows: Figure 8, a groove 2i is formed inside the correction seat 2a, an opening connected to the groove 2i is formed on the inner side of the correction seat 2a, a boss 2j is formed at the bottom of the groove 2i, a pressure sensor 2b is installed inside the boss 2j, a spring 2c is formed around the boss 2j in the groove 2i, a detection plate 2d connected to the spring 2c is installed at the opening, the front end of the detection plate 2d extends out of the opening, and a contact for triggering the pressure sensor 2b is formed at the rear end. When the correction component 2 corrects and positions the workpiece C, the detection plate 2d first contacts the edge of the workpiece C and retracts into the groove 2i after being squeezed, until the contact at the rear end of the detection plate 2d contacts the pressure sensor 2b on the boss 2j at the bottom of the groove 2i, and the detection plate 2d stops moving. The pressure sensor 2b detects the pressure, indicating that the correction process has begun. When the pressure difference of the four pressure sensors 2b is less than a predetermined value, it indicates that the correction of the workpiece C is completed.

[0047] A pressing block 2f is installed on the top of the return seat 2a of each return assembly 2 through a limit guide seat 2e, and the front end of the pressing block 2f extends to the inner side of the return seat 2a. A clamping cylinder 2g is installed on the outer side of the return seat 2a through a protective shell 2h. The output shaft of the clamping cylinder 2g passes through the protective shell 2h and is connected to the rear end of the pressing block 2f. After the workpiece C is corrected, the four return assemblies 2 will fix the workpiece C synchronously, and the clamping cylinder 2g will drive the pressing block 2f to descend along the limit guide seat 2e until the pressing block 2f presses the upper surface of the edge of the workpiece C and stops, and the workpiece C is fixed synchronously at multiple points.

[0048] Further, combined with Figure 1 , Figures 4 to 7 The drilling mechanism B includes two lifting frames 6 arranged at intervals, and a lifting motor 6a is installed on the top of the two lifting frames 6. A screw rod 6b is provided inside the two lifting frames 6. The lifting motor 6a is connected to drive the screw rod 6b to rotate. A lifting platform 7 is provided between the two lifting frames 6. The two ends of the lifting platform 7 are respectively inserted into the two lifting frames 6 and are threadedly connected with the two screw rods 6b. The two screw rods 6b are driven by the corresponding lifting motors 6a to rotate synchronously and then drive the lifting platform 7 to rise and fall. A rotating motor 8 is installed on the top of the lifting platform 7, and a turntable 9 is provided at the bottom. The output shaft of the rotating motor 8 passes through the lifting platform 7 and is connected to drive the turntable 9 to rotate.

[0049] The center of the turntable 9 corresponds to the center of the center positioning column 1 on the processing table A. Two drilling assemblies 10 are arranged on the turntable 9. The two drilling assemblies 10 are symmetrically arranged about the center of the turntable 9. Therefore, the distances between the two drilling assemblies 10 and the center of the turntable 9 are the same, which can ensure that the positions of the two prefabricated holes drilled on the workpiece C are symmetrical about the center hole of the workpiece C. Figure 4The specific structure of the drilling assembly 10 is that the drilling assembly 10 includes a drill rod 102 driven by a drilling motor 101, a connection seat 103 connected to the top of the drilling motor 101, and the connection seat 103 includes a connection seat body 103a, a T-shaped joint 103b arranged at the top of the connection seat body 103a, and a bumper plate 103c arranged on one side of the connection seat body 103a, and a locking threaded hole 103d is opened on the bumper plate 103c. The connection seat body 103a, the T-shaped joint 103b, and the bumper plate 103c are integrally formed, and the connection seat 103 is used for the detachable installation of the drilling assembly 10.

[0050] The two drilling assemblies 10 are driven by a mobile adjustment mechanism 11 to adjust the distance between the two drilling assemblies 10 and the center of the turntable 9. Figure 5 The specific structure of the mobile adjustment mechanism 11 is that the mobile adjustment mechanism 11 includes an adjustment screw 112 with positive and negative thread segments driven by a displacement motor 111, and two adjustment seats 113 respectively connected to the positive and negative thread segments of the adjustment screw 112. Figure 6 As shown, the adjustment seat 113 includes an adjustment seat body 113a, a connector 113b connected to the top of the adjustment seat body 113a, and a T-shaped slot 113c opened at the bottom of the adjustment seat body 113a. The connector 113b has a connecting threaded hole 113d ( Figure 6 The threaded structure in the connecting threaded hole 113d is not shown), the connecting threaded hole 113d is used to connect with the threaded section of the adjusting screw 112, and the T-slot 113c is used to be plugged and matched with the T-joint 103b of the connecting seat 103 of the drilling assembly 10.

[0051] The specific installation of the mobile adjustment mechanism 11 is as follows: the interior of the turntable 9 is provided with an installation cavity 9a, the adjustment screw 112 is rotatably installed in the installation cavity 9a, the displacement motor 111 is connected to the outside of the turntable 9, and the motor output shaft of the displacement motor 111 penetrates into the installation cavity 9a and is connected to one end of the adjustment screw 112. The bottom surface of the turntable 9 is provided with two installation openings 9b connected to the installation cavity 9a, the connectors 113b of the two adjustment seats 113 penetrate into the installation cavity 9a through the two installation openings 9b respectively and are threadedly connected to the positive and negative thread sections of the adjustment screw 112, and the adjustment seat bodies 113a of the two adjustment seats 113 are both located outside the two installation openings 9b, which is convenient for the installation of the drilling assembly 10.

[0052] The drilling assembly 10 can be detachably mounted on the movable adjustment mechanism 11, and then mounted on the turntable 9. When installing, it is only necessary to align the T-shaped joint 103b of the top connecting seat 103 of the drilling assembly 10 with the T-shaped slot 113c at the bottom of the adjustment seat body 113a exposed to the outside of the movable adjustment mechanism 11, and insert the T-shaped joint 103b along the T-shaped slot 113c until the contact plate 103c and the adjustment seat body 113a contact and stop, and then use the screw 12 to pass through the locking threaded hole 103d on the contact plate 103c and the adjustment seat body 113a in sequence to realize the installation and fixation of the drilling assembly 10. The state of the drilling assembly 10 after installation is as shown in FIG. Figure 7 Not shown, one side of the adjusting seat body 113a is also provided with a locking threaded hole, and the screw 12 passes through the two locking threaded holes to lock the bump plate 103c and the adjusting seat body 113a together. The position of the screw 12 is as shown in FIG. Figure 1 as shown in .

[0053] When the drilling machine of the utility model is used, the worker first aligns the center hole of the workpiece C with the center positioning column 1, and preliminarily positions the workpiece C on the processing table A. Then, the first driving mechanism 3 and the second driving mechanism 4 are started at the same time, and the first motor 3a and the second motor drive the first screw 3b and the second screw 4a to rotate at the same time, thereby driving the four correction components 2 to synchronously approach the workpiece C. The detection plate 2d of the correction component 2 first contacts the edge of the workpiece C and retracts after being squeezed, until the contact point at the rear end of the detection plate 2d contacts the pressure sensor 2b and the detection plate 2d stops moving. At this time, the pressure sensor 2b detects the pressure to indicate that the correction process has begun. When the pressures of the four pressure sensors 2b are consistent and stable, it indicates that the correction positioning of the workpiece C is completed. At this time, the workpiece C is accurately positioned at the center of the processing table A. After the correction of the workpiece C is completed, the pressing cylinders 2g of the four correction components 2 act synchronously, driving the pressing block 2f to descend along the limit guide seat 2e, until the pressing block 2f presses the upper surface of the edge of the workpiece C and stops, and the workpiece C is synchronously fixed at multiple points to avoid movement during drilling. After the workpiece C is fixed, the drilling mechanism B drills the workpiece C. The lifting frame 6 can drive the lifting platform 7, the turntable 9, and the two drilling assemblies 10 to rise and fall. The two drilling assemblies 10 are used to drill two symmetrical prefabricated holes on the workpiece C at the same time. The turntable 9 can drive the two drilling assemblies 10 to rotate and change the drilling position until all the prefabricated holes are drilled.

[0054] In addition, it should be noted that since the drilling component 10 adopts a detachable design, one or two can be installed according to the number of holes to be drilled. For example, when the number of holes to be drilled is an odd number such as 5 or 7, one drilling component 10 can be installed to drill holes one by one. When the number of holes to be drilled is an even number such as 6 or 8, two drilling components 10 can be installed to drill two holes at the same time, thereby improving the drilling efficiency.

[0055] Of course, the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-precision drilling machine for processing automobile wheel hub discs, characterized in that: The invention comprises a processing table (A) and a drilling mechanism (B), wherein a center positioning column (1) for positioning and installing a workpiece (C) is provided at the center of the processing table (A), and a plurality of return components (2) are provided on the processing table (A) around the center positioning column (1), each return component (2) is slidably installed on the processing table (A), and the distance between each return component (2) and the center positioning column (1) is the same. After the workpiece (C) is positioned and installed on the center positioning column (1), it is returned to the position and fixed by the plurality of return components (2); the drilling mechanism (B) comprises a lifting platform (7) mounted on a lifting frame (6), and a turntable (9) mounted on the lifting platform (7), wherein the center of the turntable (9) corresponds to the center of the center positioning column (1) in the upper and lower directions, and the turntable (9) is provided with a plurality of drilling assemblies (10) distributed around the center thereof, and the distance between each drilling assembly (10) and the center of the turntable (9) is the same, and the drilling assembly (10) is driven by a movable adjustment mechanism (11) to adjust the distance between the drilling assembly (10) and the center of the turntable (9), and the drilling assembly (10) and the movable adjustment mechanism (11) are detachably connected.

2. The high-precision drilling machine for processing automobile wheel hub discs according to claim 1 is characterized in that: The return components (2) have four return components (2) arranged in a cross shape, and two opposite return components (2) form a group. The two groups of return components (2) are driven by a first drive mechanism (3) and a second drive mechanism (4) respectively. The first drive mechanism (3) comprises a first screw rod (3b) having a forward and reverse thread segment driven by a first motor (3a), a first forward connection block (3c) and a first reverse connection block (3d) respectively connected to the forward and reverse thread segments of the first screw rod (3b), and the first forward connection block (3c) and the first reverse connection block (3d) are respectively connected to the two return components (2) of the same group. The second drive mechanism (4) comprises a second screw rod (4a) having a forward and reverse thread segment driven by a second motor, a second forward connection block and a second reverse connection block (4b) respectively connected to the forward and reverse thread segments of the second screw rod (4a), and the second forward connection block and the second reverse connection block (4b) are respectively connected to the two return components (2) of another group.

3. The high-precision drilling machine for processing automobile wheel hub discs according to claim 2 is characterized in that: The first screw rod (3b) and the second screw rod (4a) are distributed up and down, a cavity (A0) is provided in the processing table (A), both screw rods pass through the cavity (A0) and are rotatably mounted in the processing table (A) via a rotating seat (5), the first motor (3a) and the second motor are connected to the outside of the processing table (A), and the motor output shafts of the two motors respectively pass through the processing table (A) and are connected to the corresponding screw rods.

4. The high-precision drilling machine for processing automobile wheel hub discs according to claim 3 is characterized in that: The return assembly (2) comprises a return seat (2a), the return seat (2a) has a groove (2i) formed inside, and an opening communicating with the groove (2i) is formed on the inner side of the return seat (2a); the bottom of the groove (2i) has a boss (2j), a pressure sensor (2b) is installed in the boss (2j), a spring (2c) is provided in the groove (2i) around the boss (2j), a detection plate (2d) connected to the spring (2c) is installed at the opening, the front end of the detection plate (2d) extends out of the opening, and a contact for triggering the pressure sensor (2b) is provided at the rear end; a pressure block (2f) is installed on the top of the return seat (2a) through a limit guide seat (2e), the pressure block (2f) is driven by a clamping cylinder (2g) to lift and lower the workpiece (C), and the clamping cylinder (2g) is installed on the outer side of the return seat (2a) through a protective shell (2h).

5. The high-precision drilling machine for processing automobile wheel hub discs according to claim 4 is characterized in that: The upper surface of the processing table (A) is provided with a slide groove (A1) corresponding to each of the return components (2); the return seat (2a) is slidably installed in the slide groove (A1); the slide groove (A1) is connected to the cavity (A0); and the corresponding connecting blocks on each screw rod are respectively inserted into the corresponding slide groove (A1) and connected to the corresponding return seat (2a).

6. The high-precision drilling machine for processing automobile wheel hub discs according to claim 1 is characterized in that: Two lifting frames (6) are arranged at intervals, and each of the two lifting frames (6) is provided with a screw rod (6b) driven to rotate by a lifting motor (6a). The two ends of the lifting platform (7) are respectively inserted into the two lifting frames (6) and are threadedly connected to the screw rod (6b). The lifting platform (7) is provided with a rotating motor (8) connected to drive the rotating platform (9) to rotate.

7. The high-precision drilling machine for processing automobile wheel hub discs according to claim 1 is characterized in that: The drilling assembly (10) has two symmetrically arranged about the center of the turntable (9), each drilling assembly (10) comprising a drill rod (102) driven by a drilling motor (101), a connecting seat (103) connected to the top of the drilling motor (101), the connecting seat (103) comprising a connecting seat body (103a), a T-shaped joint (103b) connected to the top of the connecting seat body (103a), and a contact plate (103c) connected to one side of the connecting seat body (103a), the contact plate (103c) being provided with a locking threaded hole (103d).

8. The high-precision drilling machine for processing automobile wheel hub discs according to claim 7 is characterized in that: The movable adjustment mechanism (11) comprises an adjustment screw (112) having positive and negative thread segments driven by a displacement motor (111), and two adjustment seats (113) respectively connected to the positive and negative thread segments of the adjustment screw (112); each adjustment seat (113) comprises an adjustment seat body (113a), a connecting head (113b) connected to the top of the adjustment seat body (113a), and a T-shaped slot (113c) provided at the bottom of the adjustment seat body (113a); a connecting threaded hole (113d) for connecting to the adjustment screw (112) is provided on the connecting head (113b); the T-shaped slot (113c) is plug-fitted with the T-shaped joint (103b); and the contact plate (103c) and the adjustment seat body (113a) are locked and connected by means of screws (12).

9. The high-precision drilling machine for processing automobile wheel hub discs according to claim 8, characterized in that: The turntable (9) is provided with a mounting cavity (9a), the adjustment screw (112) is rotatably mounted in the mounting cavity (9a), the displacement motor (111) is connected to the outside of the turntable (9), and the motor output shaft of the displacement motor (111) penetrates into the mounting cavity (9a) and is connected to the adjustment screw (112); the bottom surface of the turntable (9) is provided with two mounting openings (9b) connected to the mounting cavity (9a), the connecting heads (113b) of the two adjustment seats (113) respectively penetrate into the mounting cavity (9a) through the two mounting openings (9b) and are connected to the adjustment screw (112), and the adjustment seat bodies (113a) of the two adjustment seats (113) are located on the outside of the two mounting openings (9b).

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