A vehicle half-axle sleeve intelligent production line and operation method thereof

Abstract

The present invention discloses an intelligent production line for vehicle axle bushings and its operating method. The production line includes a vertical machining center, a deburring workstation, a laser marker, a precision CNC lathe, a sampling track, a manual sampling platform, a crane, a safety fence, a temporary storage platform, a robot floor rail, a turning center, a track-mounted loading and unloading robot, a production task display screen, a safety gate, and a dedicated material platform. The intelligent production line for axle bushings reduces labor intensity, increases production capacity, lowers manufacturing costs, replaces manual labor, and improves efficiency. It can be used to process axle bushings and steering shaft tubes of various specifications and for off-road vehicle chassis and axles. The number and distribution of processing equipment in each section can be adjusted according to production schedule and site size to achieve balanced production.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent manufacturing technology, and in particular to an intelligent production line for vehicle half-axle bushings and an operation method thereof. Background Art

[0002] At present, manufacturing enterprises across the country are vigorously developing intelligent manufacturing. The traditional methods in the manufacturing process of vehicle half-axle sleeve parts or major parts are all completed manually or offline with some semi-automatic equipment. The efficiency is low, there is no overall automated online production, large-scale production cannot be achieved, and the high continuity of the process cannot be guaranteed. In addition, it is highly dependent on the level of workers. It is necessary to solve the "multi-variety, small-batch" production needs through process optimization, technology upgrades and business process changes. The requirements for intelligence, flexibility and reliability are particularly urgent. Summary of the Invention

[0003] The object of the present invention is to provide an intelligent production line for vehicle half-axle bushings and an operating method thereof.

[0004] The technical solution for achieving the purpose of the present invention is: an intelligent production line for vehicle half-axle bushings, including a vertical machining center, a deburring workstation, a laser marking machine, a precision CNC lathe, a sampling track, a manual sampling table, a crane, a safety fence, a temporary storage table, a robot ground rail, a turning center, a rail-mounted loading and unloading robot, a production task display screen, a safety door, and a dedicated material table;

[0005] Vertical machining center machine tools, precision CNC lathes, and turning center machine tools are used to complete the processing of corresponding parts processes; the temporary storage table is used to temporarily store parts during process conversion;

[0006] The deburring workstation moves according to the set program and uses a floating reamer to remove burrs on parts;

[0007] Laser marking machines are used to mark products;

[0008] The sampling inspection track is used to transport the sample inspection parts to the manual sampling inspection table for manual sampling inspection;

[0009] The overhead crane is used to lift parts when the production line is in manual processing mode;

[0010] Safety fences are used to restrict and prevent personnel from moving around in the production line. A production task display screen is installed on the safety fence, allowing the master control system to display relevant reports on the large screen. A safety door is installed on the safety fence for operators to enter for maintenance.

[0011] The robot ground rail serves as a walking platform for the rail-type loading and unloading robot to locate the robot's working position. The rail-type loading and unloading robot is used for loading and unloading parts.

[0012] The dedicated material table is used to place blank parts and finished parts, and to position the parts.

[0013] A method for operating a vehicle half-axle bushing intelligent production line comprises the following steps:

[0014] Step 1: Use a forklift or overhead crane to transport the blank to be processed from the warehouse to the dedicated material table pallet;

[0015] Step 2, the three claws of the rail-type loading and unloading robot grab the blank from the pallet. After the sensor on the gripper detects that the gripper clamps the part, the rail-type loading and unloading robot moves on the robot ground rail to the designated position outside the precision CNC lathe. After the rail-type loading and unloading robot reaches the designated position, the spindle of the precision CNC lathe rotates to the positioning point, the automatic door opens, the hydraulic chuck is released, the robot grabs the part and moves it to the hydraulic chuck position of the precision CNC lathe. The hydraulic chuck is clamped, and the rail-type loading and unloading robot exits the machine tool. The automatic door of the precision CNC lathe closes, and the processing runs automatically. After the parts in the precision CNC lathe are processed, the spindle of the precision CNC lathe rotates to the positioning point, and the signal is sent to the main control system. The machine tool safety door opens, and the robot gripper grabs the middle position of the part, the hydraulic chuck is released, and the robot exits to the designated point outside the machine tool to change position. The robot gripper rotates the part 90 degrees, places it on the temporary storage table, and the gripper is released;

[0016] Step 3: The three-claw gripper of the rail-type loading and unloading robot grips the large end of the part and moves it to the designated position outside the turning center machine tool; the turning center machine tool spindle rotates to the positioning point, the automatic door opens, and the hydraulic chuck is released; the robot grabs the part and moves it to the hydraulic chuck position of the turning center machine tool, the hydraulic chuck is clamped, and the robot exits the machine tool; the turning center machine tool automatic door closes, the processing automatically runs, and the part processing process 2 begins. After the CNC lathe turning center machine tool completes the part processing process 2, the spindle rotates to the positioning point, and the master control system controls the turning center machine tool to open automatically; the robot gripper grabs the middle position of the part, the hydraulic chuck is released, the robot exits the turning center machine tool to the designated position, and the machine tool automatic door closes;

[0017] Step 4: The rail-type loading and unloading robot grabs the part, rotates 90 degrees, moves it to the temporary storage table, places the part on the temporary storage table, and the robot's three-grip gripper grabs the large end of the part and moves it to the specified position outside the vertical machining center machine tool; the vertical machining center machine tool automatic door opens, the pneumatic chuck is released, the robot grabs the part to the chuck, and the chuck is clamped; the robot exits, the machine tool automatic door closes, and the program runs to process the part process 3. After the part process 3 is completed, the machine tool automatic door opens, the robot's three-grip gripper grabs the large end of the part, the pneumatic chuck is released, and the rail-type loading and unloading robot exits to the machine tool The machine tool automatically closes at the designated position; the robot gripper rotates 90 degrees, and the robot gripper grabs the part to the designated position outside the vertical machining center; the machine tool automatic door opens, and the robot feeds the material; the hydraulic chuck of the vertical machining center is clamped, the hydraulic tailstock top is extended and tightened, the robot gripper is released, and the robot withdraws to the designated position outside the machine tool, the automatic door closes, and the processing automatically runs to process the part in step 4. After the processing of step 4 is completed, the automatic door opens, the robot gripper grabs the part, the chuck is released, the hydraulic tailstock is retracted, the robot withdraws, and the machine tool automatic door closes;

[0018] Step 5: The rail-type loading and unloading robot grips the parts and moves them to the laser marking machine. The master control system controls the laser marking machine to mark the parts and sends a signal to the master control system after the marking is completed.

[0019] Step 6: The track-type loading and unloading robot grips the part and moves it to the deburring workstation. The robot runs along the track, and the deburring workstation executes the deburring program. The processing flow ends.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1) the existing machine tools are transformed into intelligent ones to realize linkage with other equipment, and are equipped with intelligent robots. By modifying their grippers to adapt to the size of parts, automatic loading and unloading of parts is realized, and automatic material lines are configured. Parts are automatically transferred from the production line working area to the manual working area, replacing manual labor and improving efficiency; 2) The intelligent production line for vehicle half-axle sleeves is a multi-variety production organization form organized around a certain type of parts group; it has the necessary machinery and equipment to complete the processing tasks of several similar parts. Each device on the production line is compatible with products of a certain range of sizes. The equipment is highly flexible and the production process steps of different products can be freely adjusted according to production needs; 3) The entire line completes product processing through the cooperation of machine tools and robots. Compared with traditional manual methods, the products produced have good consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the intelligent production line of vehicle half-axle sleeves of the present invention.

[0022] Figure 2 Schematic diagram of the robot gripper of the present invention.

[0023] Figure 3 Schematic diagram of the tool setting instrument of the present invention.

[0024] Figure 4 It is a schematic diagram of a vehicle half-axle sleeve of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the material pushing mechanism of the present invention. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, an intelligent production line for vehicle half-axle bushings includes a vertical machining center 1, a deburring workstation 2, a laser marking machine 3, a precision CNC lathe 4, a sampling track 5, a manual sampling table 7, a crane 8, a safety fence 9, a temporary storage table 10, a robot ground rail 11, a turning center 12, a track-type loading and unloading robot 13, a production task display screen 14, a safety door 15, and a dedicated material table 16;

[0027] The vertical machining center machine tool 1, the precision CNC lathe 4, and the turning center machine tool 12 are used to complete the processing of corresponding parts; the temporary storage table 10 is used to temporarily store parts during process conversion;

[0028] Deburring workstation 2 moves according to the set program and uses a floating reamer to remove burrs on parts;

[0029] The laser marking machine 3 is used to mark the product;

[0030] The sampling inspection track 5 is used to transport the sampled parts to the manual sampling inspection station 7 for manual sampling inspection;

[0031] Overhead crane 8 is used to lift parts when the production line is in manual processing mode;

[0032] The safety fence 9 is used to limit and prevent personnel activities in the production line. The safety fence 9 is fixed to the ground by anchor bolts. The production task display screen 14 is installed on the safety fence 9 and is used for the master control system to display relevant reports on the large screen. The safety door 15 is installed on the safety fence 9 for maintenance entry of operators. The safety door is equipped with a safety lock that can be operated in stages and can output alarm signals; the master control system is set in the master control box 6.

[0033] The robot ground rail 11 serves as a walking platform for the track-type loading and unloading robot 13 to locate the robot's working position. The track-type loading and unloading robot 13 is used for loading and unloading parts.

[0034] The dedicated material table 16 is used to place the blank parts and the finished parts, and to realize the positioning of the parts.

[0035] Vertical machining center machine tool 1 is used for processing part process 3 and part process 4, precision CNC lathe 4 is used for processing part process 1, and turning center machine tool 12 is used for processing part process 2; vehicle half-axle sleeve such as Figure 4 As shown;

[0036] The part process 1 is as follows: clamping the outer diameter of the large end 22 of the vehicle half-shaft sleeve, chamfering the hole of the small end 23 of the vehicle half-shaft sleeve by 30 degrees; installing the centering point, rough turning the outer diameter; installing the centering point, and chamfering the inner hole of the small end 23 of the vehicle half-shaft sleeve; removing the centering point, installing the centering point, and fine turning the outer diameter of the small end 23 of the vehicle half-shaft sleeve, fine turning the threads and the ring groove;

[0037] The part process 2 is as follows: clamping the outer circle of the small end 23 of the vehicle half-axle sleeve, centering the outer circle, with a clamping accuracy of ≤0.02mm, and finishing the outer circle and inner hole of the large end 22 of the vehicle half-axle sleeve;

[0038] The part process 3 is: clamping the outer circle of the small end 23 of the vehicle half-axle sleeve, milling it flat, and drilling the circumferential hole;

[0039] The part process 4 is as follows: the machine tool is positioned with the inner hole of the large end 22 of the vehicle half-axle sleeve, the center is set, the keyway is milled, and the hole is drilled.

[0040] Furthermore, the dedicated material table 16 includes a material table bracket, a tray and corresponding positioning pins. The tray is installed on the material table bracket, and the positioning of different parts is achieved by replacing the positioning pins.

[0041] Furthermore, the rail-type loading and unloading robot 13 includes a robot gripper, which is provided with four working surfaces, each of which is used to clamp the corresponding parts, and a pushing mechanism is provided on each working surface, such as Figure 2 As shown, it can meet all part clamping requirements; it has the function of detecting whether the parts are clamped or released; it uses anti-scratch materials to prevent the parts from being scratched; in order to ensure the operational safety of the robot gripper, it is necessary to prevent the intake pressure from decreasing. A pressure maintaining valve 18 is installed on the intake pipe of the robot gripper to prevent the gripping force from being reduced due to the decrease in intake pressure. In the event of air or power outages, the gripper will not loosen and cause the parts to fall.

[0042] Furthermore, the pushing mechanism 17 is composed of a top column 24, a spring 25 and a stop screw 26, as shown in FIG. Figure 5As shown, a limiting groove 27 is provided on the side of the top column 24 to limit the top column 24 in the mounting hole and to make the spring 25 generate an initial compression amount to ensure that the part is in close contact with the positioning surface of the machine tool fixture; the robot gripper opens to the maximum state, gradually moves to the top of the part, and the center is basically aligned and pressed down. The part compresses the top column 24 of the pushing mechanism, and the spring 25 is further compressed until the part is flush with the finger plane. The gripper retracts and clamps the part, and the pushing mechanism forms a pushing thrust between the part and the gripper fingers. The robot clamps the part and moves it to the machine tool chuck position, releases the three jaws, releases the spring of the push mechanism, and pushes the part into the machine tool chuck to make the bottom plane of the large or small end of the part flush with the machine tool fixture surface. The clamping jaws are designed into a three-step shape according to the part size to ensure that a set of clamping jaws can meet the clamping requirements of all parts. The inner step plane is used for the clamping area of 330-350mm, the middle step plane is used for the clamping area of 310-330mm, and the inner plane is used for the clamping area of 185-205mm.

[0043] Furthermore, the robot gripper is equipped with an air blower 19 for cleaning chips from the machined work surface and machine tool fixture. When the master control system sends an air blow command to the robot, the robot first moves to the vicinity of the part and the machine tool chuck, and then performs an air blow to clean the work surface and the machine tool chuck. The designed number of air blows is 4, and the number of air blows can be adjusted based on the air blow effect during on-site debugging to achieve a chip-free effect on the part surface and machine tool fixture.

[0044] Furthermore, the laser marking machine 3 starts marking after receiving the instruction from the master control system. The marking content includes the product number, batch number, serial number and furnace batch number, and the marking content is sent to the database.

[0045] Furthermore, the vertical machining center machine tool 1, the precision CNC lathe 4, and the turning center machine tool 12 are all equipped with a tool setting instrument 20 for detecting parts and tools, such as Figure 3 As shown, the part tool detection mainly measures the length of the machine tool tool. By measuring the length of the tool before processing and comparing it with the length in good condition, the alarm device 21 detects any possible wear, breakage and other problems and immediately alarms to ensure that the problematic tool is not used in subsequent processing; the precision CNC lathe 4 and the turning center machine tool 12 are equipped with a hydraulic cylinder on the base of the center frame and sensors on both sides of the tool holder; the safety doors of the vertical machining center machine tool 1, the precision CNC lathe 4, and the turning center machine tool 12 contain safety door locks and sensors for obtaining the position information of the safety door.

[0046] A method for operating a vehicle half-axle bushing intelligent production line comprises the following steps:

[0047] Step 1: transport the blank to be processed from the warehouse to the dedicated material table pallet by forklift or overhead crane 8;

[0048] Step 2, the three claws of the rail-type loading and unloading robot 13 grab the blank from the pallet. After the sensor on the gripper detects that the gripper clamps the part, the rail-type loading and unloading robot 13 moves on the robot ground rail 11 to the designated position outside the precision CNC lathe 4. After the rail-type loading and unloading robot 13 arrives at the designated position, the spindle of the precision CNC lathe 4 rotates to the positioning point, the automatic door opens, the hydraulic chuck is released, the robot grabs the part and moves it to the hydraulic chuck position of the precision CNC lathe 4. The hydraulic chuck is clamped, the rail-type loading and unloading robot 13 exits the machine tool, the automatic door of the precision CNC lathe 4 closes, and the processing runs automatically. After the parts in the precision CNC lathe 4 are processed, the spindle of the precision CNC lathe 4 rotates to the positioning point, a signal is sent to the main control system, the machine tool safety door opens, the robot gripper grabs the middle position of the part, the hydraulic chuck is released, the robot exits to the designated point outside the machine tool to change position, the robot gripper rotates the part 90 degrees, places it on the temporary storage table, and the gripper is released;

[0049] Step 3: The three-claw gripper of the rail-type loading and unloading robot 13 grips the large end of the part and moves it to the designated position outside the turning center machine 12; the spindle of the turning center machine 12 rotates to the positioning point, the automatic door opens, and the hydraulic chuck is released; the robot grabs the part and moves it to the hydraulic chuck position of the turning center machine, the hydraulic chuck is clamped, and the robot exits the machine; the automatic door of the turning center machine closes, the processing automatically runs, and the part processing process 2 begins. After the CNC lathe turning center machine completes the part processing process 2, the spindle rotates to the positioning point, and the master control system controls the turning center machine to open automatically; the robot gripper grabs the middle position of the part, the hydraulic chuck is released, the robot exits the turning center machine to the designated position, and the automatic door of the machine closes;

[0050] Step 4: The rail-type loading and unloading robot 13 grabs the part and rotates 90 degrees, moves it to the temporary storage table, places the part on the temporary storage table, and the robot's three-grip gripper grabs the large end of the part and moves it to the specified position outside the vertical machining center machine tool 1; the automatic door of the vertical machining center machine tool 1 opens, the pneumatic chuck is released, the robot grabs the part to the chuck, and the chuck is clamped; the robot exits, the automatic door of the machine tool closes, and the program runs to process the part process 3. After the part process 3 is completed, the automatic door of the machine tool opens, the robot's three-grip gripper grabs the large end of the part, the pneumatic chuck is released, and the rail-type loading and unloading robot 13 The robot exits to the designated position of the machine tool, and the machine tool automatic door closes; the robot gripper rotates 90 degrees and is placed on the temporary storage table. The robot gripper grabs the part and takes it to the designated position outside the vertical machining center machine tool; the machine tool automatic door opens, and the robot feeds the material; the hydraulic chuck of the vertical machining center machine tool 1 is clamped, the hydraulic tailstock top is extended to tighten, the robot gripper is released, the robot exits to the designated position outside the machine tool, the automatic door closes, and the processing automatically runs to process part process 4. After the processing of part process 4 is completed, the automatic door opens, the robot gripper grabs the part, the chuck is released, the hydraulic tailstock retracts, the robot exits, and the machine tool automatic door closes;

[0051] Step 5: The rail-type loading and unloading robot 13 moves the parts to the laser marking machine 3, and the master control system controls the laser marking machine to mark the parts. After the marking is completed, a signal is sent to the master control system.

[0052] Step 6: The track-type loading and unloading robot 13 grips the part and moves it to the deburring workstation 2. The robot moves along the track, and the floating power head of the deburring workstation performs the deburring program. The processing flow ends.

[0053] Furthermore, when executing the random inspection instruction, the track-type loading and unloading robot 13 uses three claws to grab the finished product with the corresponding number from the pallet and places it on the random inspection track 5; after the random inspection track sensor detects the part, the random inspection track is started; after the sensor at the other end of the random inspection track detects that the part has reached the stop position, the random inspection track stops, and the control terminal prompts that the part is in place; the part is removed and placed on the random inspection table 7 for inspection; after the inspection work is completed, the part is temporarily placed on the random inspection table, and is placed back on the dedicated material table 16 when the parts are unloaded after the entire shift of parts processing is completed.

[0054] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An intelligent production line for vehicle half-axle bushings, characterized in that: It includes a vertical machining center (1), a deburring workstation (2), a laser marking machine (3), a precision CNC lathe (4), a sampling rail (5), a manual sampling table (7), a crane (8), a safety fence (9), a temporary storage table (10), a robot ground rail (11), a turning center (12), a rail-type loading and unloading robot (13), a production task display screen (14), a safety door (15) and a special material table (16); The vertical machining center machine tool (1), the precision CNC lathe (4), and the turning center machine tool (12) are used to complete the processing of corresponding parts; the temporary storage table (10) is used to temporarily store parts during process conversion; The deburring workstation (2) moves according to the set program and uses a floating reamer to remove burrs on the parts; Laser marking machine (3) is used to mark products; The sampling inspection track (5) is used to transport the sample inspection parts to the manual sampling inspection table (7) for manual sampling inspection; The overhead crane (8) is used to lift parts when the production line is in manual processing mode; The safety fence (9) is used to restrict and prevent personnel from moving within the production line. The production task display screen (14) is installed on the safety fence (9) for the master control system to display relevant reports on the large screen. The safety door (15) is installed on the safety fence (9) for maintenance entry by operators. The robot ground rail (11) serves as a walking platform for a track-type loading and unloading robot (13) to locate the robot's working position. The track-type loading and unloading robot (13) is used for loading and unloading parts. The dedicated material table (16) is used to place the blank parts and the finished parts, and to realize the positioning of the parts; The vertical machining center machine tool (1) is used for processing part process 3 and part process 4, the precision CNC lathe (4) is used for processing part process 1, and the turning center machine tool (12) is used for processing part process 2; The part process 1 is as follows: clamping the outer circle of the large end (22) of the vehicle half-axle sleeve, chamfering the hole of the small end (23) of the vehicle half-axle sleeve by 30 degrees; placing the top, rough turning the outer circle; placing the center frame, and chamfering the inner hole of the small end (23) of the vehicle half-axle sleeve; removing the center frame, placing the top, and fine turning the outer circle of the small end (23) of the vehicle half-axle sleeve, and fine turning the threads and ring grooves; The part process 2 is as follows: clamping the outer circle of the small end (23) of the vehicle half-axle sleeve, centering the outer circle, with a clamping accuracy of ≤0.02mm, and finishing the outer circle and inner hole of the large end (22) of the vehicle half-axle sleeve; The part process 3 is as follows: clamping the outer circle of the small end (23) of the vehicle half-axle sleeve, milling it flat, and drilling the circumferential hole; The part process 4 is as follows: the machine tool is positioned with the inner hole of the large end (22) of the vehicle half-axle sleeve, the center is set, the keyway is milled, and the hole is drilled; The dedicated material table (16) includes a material table bracket, a tray and corresponding positioning pins, the tray is mounted on the material table bracket, and the positioning of different parts is achieved by replacing the positioning pins; The track-type loading and unloading robot (13) includes a robot gripper, which is provided with four working surfaces, each of which is used to grip corresponding parts, and a pushing mechanism is provided on each working surface; a pressure maintaining valve (18) is installed on the air inlet pipe of the robot gripper; The pushing mechanism (17) is composed of a top column (24), a spring (25) and a stop screw (26). A limiting slot (27) is provided on the side of the top column (24) so that the top column (24) is limited in the mounting hole and the spring (25) generates an initial compression amount. The robot gripper is opened to the maximum state and gradually moves to the top of the part. The center is basically aligned and pressed down. The part compresses the top column (24) of the pushing mechanism. The spring (25) is further compressed until the part is flush with the finger plane. The gripper retracts and clamps the part. The pushing mechanism forms a pushing thrust between the part and the gripper finger.

2. The intelligent production line for vehicle half-axle bushings according to claim 1 is characterized in that: The robot gripper is also provided with an air blower (19) for cleaning chips from the processed working surface and the machine tool fixture.

3. The intelligent production line for vehicle half-axle bushings according to claim 1, characterized in that: The laser marking machine (3) starts marking after receiving the instruction from the master control system. The marking content includes product number, batch number, serial number and furnace batch number, and sends the marking content to the database.

4. The intelligent production line for vehicle half-axle bushings according to claim 1, characterized in that: The vertical machining center (1), precision CNC lathe (4), and turning center (12) are all equipped with a tool detection and setting instrument (20) for measuring the length of the tool before machining and comparing it with the length in a good state; a hydraulic cylinder is installed on the center frame base of the precision CNC lathe (4) and turning center (12), and sensors are installed on both sides of the tool frame; and a safety door of the vertical machining center (1), precision CNC lathe (4), and turning center (12) contains a safety door lock and a sensor for obtaining position information of the safety door.

5. A method for operating the intelligent production line for vehicle half-axle bushings according to claim 1, characterized in that: The following steps are involved: Step 1: transport the blank to be processed from the warehouse to a dedicated material table pallet by means of a forklift or overhead crane (8); Step 2, the rail-type loading and unloading robot (13) grabs the blank from the pallet with three claws. After the sensor on the gripper detects that the gripper has clamped the part, the rail-type loading and unloading robot (13) moves on the robot ground rail (11) to the designated position outside the precision CNC lathe (4). After the rail-type loading and unloading robot (13) reaches the designated position, the spindle of the precision CNC lathe (4) rotates to the positioning point, the automatic door opens, the hydraulic chuck is released, and the robot grabs the part and moves it to the hydraulic chuck position of the precision CNC lathe (4). The chuck is clamped, the rail-type loading and unloading robot (13) exits the machine tool, the automatic door of the precision CNC lathe (4) is closed, and the processing is automatically carried out. After the parts in the precision CNC lathe (4) are processed, the spindle of the precision CNC lathe (4) rotates to the positioning point, sends a signal to the main control system, the machine tool safety door opens, the robot gripper grabs the middle position of the part, the hydraulic chuck is released, the robot exits to the designated point outside the machine tool and changes position, the robot gripper rotates the part 90 degrees, puts it on the temporary storage table, and the gripper is released; Step 3, the three-claw gripper of the rail-type loading and unloading robot (13) grips the large end of the part and moves it to the designated position outside the turning center machine (12); the main shaft of the turning center machine (12) rotates to the positioning point, the automatic door opens, and the hydraulic chuck is released; the robot grabs the part and moves it to the hydraulic chuck position of the turning center machine, the hydraulic chuck is clamped, and the robot exits the machine; the automatic door of the turning center machine closes, the processing automatically runs, and the processing process 2 of the part is started. After the precision CNC lathe (4) turns the part process 2, the main shaft rotates to the positioning point, and the main control system controls the turning center machine to open automatically; the robot gripper grabs the middle position of the part, the hydraulic chuck is released, the robot exits the turning center machine to the designated position, and the automatic door of the machine closes; Step 4: The rail-type loading and unloading robot (13) grabs the part, rotates it 90 degrees, moves it to the temporary storage table, places the part on the temporary storage table, and the robot's three-grip gripper grabs the large end of the part and moves it to the designated position outside the vertical machining center (1); the vertical machining center (1) automatic door opens, the pneumatic chuck is released, the robot grabs the part to the chuck, and the chuck is clamped; the robot exits, the machine tool automatic door closes, and the program runs to process the part process 3. After the part process 3 is completed, the machine tool automatic door opens, the robot's three-grip gripper grabs the large end of the part, the pneumatic chuck is released, and the rail-type loading and unloading robot (13) The robot exits to the designated position of the machine tool, and the automatic door of the machine tool closes; the robot gripper rotates 90 degrees, and the robot gripper grabs the part to the designated position outside the vertical machining center machine tool; the automatic door of the machine tool opens, and the robot feeds the material; the hydraulic chuck of the vertical machining center machine tool (1) is clamped, the hydraulic tailstock top is extended and tightened, the robot gripper is released, the robot exits to the designated position outside the machine tool, the automatic door closes, and the processing automatically runs to process the part process 4. After the part process 4 is completed, the automatic door opens, the robot gripper grabs the part, the chuck is released, the hydraulic tailstock is retracted, the robot exits, and the automatic door of the machine tool closes; Step 5: The track-type loading and unloading robot (13) moves the parts to the laser marking machine (3) by gripping them. The master control system controls the laser marking machine to mark the parts, and sends a signal to the master control system after the marking is completed. Step 6: The track-type loading and unloading robot (13) grips the part and moves it to the deburring workstation (2). The robot moves along the track, and the deburring workstation (2) executes the deburring program; the processing flow ends.

6. The method for operating the intelligent production line for vehicle half-axle bushings according to claim 5, characterized in that: When executing the sampling inspection instruction, the track-type loading and unloading robot (13) uses three claws to grab the finished product with the corresponding number from the pallet and places it on the sampling inspection track (5); after the sampling inspection track sensor detects the part, the sampling inspection track is started; after the sensor at the other end of the sampling inspection track detects that the part has reached the stop position, the sampling inspection track stops and the control terminal prompts that the part is in place; the part is removed and placed on the manual sampling inspection table (7) for inspection; after the inspection work is completed, the part is temporarily placed on the sampling inspection table and returned to the dedicated material table (16) when the material is unloaded after the entire shift of parts processing is completed.

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