Automatic feeding and discharging device for automobile rocker shaft

Abstract

The application discloses an automatic feeding and discharging device for automobile rocker arm shafts, and belongs to the technical field of automobile parts manufacturing. The part conveying device is connected in the vertical direction of the numerical control machine tool shell, the part conveying device is provided with an anti-blocking device, and the anti-blocking device is connected with the numerical control machine tool shell; the feeding device and the discharging device are respectively arranged in the transverse direction of the numerical control machine tool shell and are located on the two sides of the part conveying device, the centers of the feeding device and the discharging device are concentric, and the center lines of the numerical control machine tool main shafts coincide; the positioning and clamping device is installed in the numerical control machine tool main shaft; and the blowing device is installed outside the hopper of the part conveying device. The application can realize one-man multi-machine operation or one-man two-sequence operation, achieves the effect of continuous operation without stopping the machine, greatly prolongs the effective processing time of the equipment, greatly improves the process operation rate and the equipment utilization rate, effectively reduces the labor intensity of the operator, has high automation degree and processing precision, and greatly improves the product manufacturing quality.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, specifically an automatic loading and unloading device for automotive rocker arm shafts. Background Technology

[0002] In the manufacturing of automotive rocker arm shaft parts, when machining parts using CNC machine tools, the machining production line mostly uses manual loading and unloading. Because CNC machine tools operate at high speeds, the time spent manually loading and unloading exceeds the machine's processing time. Furthermore, due to the short processing intervals, it's impossible for one person to operate multiple machines simultaneously. At the same time, the large production volume results in high labor intensity, low equipment utilization, and low process output and utilization rates. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the purpose of this invention is to provide an automatic loading and unloading device for automobile rocker arm shafts, so as to realize continuous processing operations on CNC machine tools.

[0004] To achieve the above-mentioned objectives, the parts conveying device of the automatic loading and unloading device of the present invention is connected in the vertical direction of the CNC machine tool housing. The parts conveying device is equipped with an anti-jamming device, which is connected to the CNC machine tool housing. The loading device and the unloading device are respectively installed in the horizontal direction of the CNC machine tool housing, located on both sides of the parts conveying device. The centers of the loading device and the unloading device are concentric and coincide with the center line of the CNC machine tool spindle. The positioning and clamping device is installed inside the CNC machine tool spindle. The blowing device is installed outside the hopper of the parts conveying device.

[0005] Furthermore, the hopper of the part conveying device is fixedly connected to the CNC machine tool housing. The hopper is welded from thin-walled steel plate, and its width is 20mm wider than the length of the part. The bottom of the hopper has a 15° inclination angle, and the discharge port has a constricted structure that allows only a single part to slide out. The side wall of the hopper has a square window for the pusher plate of the anti-jamming device to be pushed in. The guide plate, double-row tool holder, and receiving box are connected to the vertical guide rail. The guide plate has a positioning groove where the part slides down the discharge port of the hopper into the guide plate. The vertical guide rail drives the guide plate, double-row tool post, and receiving box to move. When loading, the positioning groove of the guide plate is aligned with the center of the CNC machine tool spindle. In the horizontal direction, the guide plate is aligned with the installation position of the hopper, and the guide plate is wider than the hopper. When machining parts, the tool tip of the tool mounted on the double-row tool post is at the same height as the center of the CNC machine tool spindle in the vertical direction. The vertical guide rail and horizontal guide rail are controlled by the CNC machine tool control system to move, driving the tool to move. When unloading, the center of the receiving box is aligned with the center of the CNC machine tool spindle.

[0006] Furthermore, the air blowing block of the blowing device is installed on the right side of the hopper and is connected to the CNC machine tool housing by a thread. It is connected to the main air circuit of the machine tool by an air pipe, and the air outlet of the air blowing block is directed towards the guide plate.

[0007] Furthermore, the support plate of the anti-jamming device is connected to the CNC machine tool housing by a thread, the pusher cylinder is installed on the support plate, and the pusher cylinder and the pusher plate are connected by a thread; the air pipe connects the machine tool's main air circuit to the pusher cylinder, providing power to the pusher cylinder, so that the pusher plate can reciprocate, and arrange the parts accumulated in the hopper at the discharge port into a vertical row.

[0008] Furthermore, the feeding cylinder of the feeding device is connected to the sensor and the air pipe. The feeding cylinder is connected and positioned to the CNC machine tool housing through a positioning plate. The feeding cylinder extends out and is suspended outside the CNC machine tool body. The feeding cylinder is connected to the machine tool's main air circuit through an air pipe to provide power to the feeding cylinder. The feeding rod is connected to the feeding cylinder through a connecting sleeve. The connecting sleeve is threadedly connected to the feeding cylinder. The feeding rod is fitted into the connecting sleeve through an interference fit.

[0009] Furthermore, the elastic clamping sleeve of the positioning and clamping device is threadedly connected to the sleeve, and the positioning sleeve is fitted inside the sleeve through an interference fit. The sleeve is installed inside the spindle of the CNC machine tool.

[0010] Furthermore, the feeding cylinder of the feeding device is connected to a sensor and an air pipe. The feeding cylinder is connected and positioned to the CNC machine tool housing via a positioning plate. The feeding cylinder extends out and is suspended outside the main body of the CNC machine tool. The feeding cylinder is connected to the main air circuit of the machine tool via an air pipe to provide power to the feeding cylinder. The feeding rod is connected to the feeding cylinder via a connecting sleeve. The connecting sleeve is threadedly connected to the feeding cylinder. The feeding rod is fitted into the connecting sleeve with an interference fit. A support sleeve is fitted on the feeding rod to ensure that the center of the feeding rod does not deviate from the center of the CNC machine tool spindle within the error range when the feeding rod moves laterally within the sleeve.

[0011] Furthermore, the vertical guide rail is controlled by the CNC machine tool control system to rotate the machine tool's horizontal guide rail servo motor, which drives the ball screw transmission device to control the movement of the horizontal guide rail, and at the same time drives the vertical guide rail mounted on the horizontal guide rail to move; the vertical guide rail servo motor is controlled by the CNC machine tool control system to rotate, which drives the ball screw transmission device to control the movement of the vertical guide rail, and at the same time drives the double-row tool post to move, so as to achieve precise positioning of the tool.

[0012] Furthermore, the vertical guide rail, horizontal guide rail, CNC machine tool spindle, double-row tool post, loading cylinder, unloading cylinder, pushing cylinder, elastic clamp, sensor, machine tool main air circuit, machine tool hydraulic station and CNC machine tool control system of the automatic loading and unloading device are connected.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The hopper and receiving box form a buffer zone for parts turnover during the processing. Operators can put out and pick up parts at any time, enabling one operator to operate multiple machines or two sequences at the same time, achieving continuous operation without stopping the equipment. This greatly extends the effective processing time of the equipment and significantly improves the utilization rate of the process and the equipment.

[0014] 2. It is easy to use and does not require high skill levels from operators, which can effectively reduce personnel and production waste and reduce the labor intensity of operators.

[0015] 3. It is compatible with the control and execution systems of general CNC machine tools, requiring no precision equipment or parts, and has low modification costs.

[0016] 4. High degree of automation and processing precision, which can greatly improve the quality of product manufacturing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the parts conveying device.

[0019] Figure 3 for Figure 2 A schematic diagram of the hopper structure.

[0020] Figure 4 for Figure 3 The right view.

[0021] Figure 5 for Figure 1 A schematic diagram of the feeding device.

[0022] Figure 6 for Figure 1 A schematic diagram of the feeding device and the positioning clamping device.

[0023] In the diagram: 1. CNC machine tool housing; 2. Pusher cylinder; 3. Support plate; 4. Pusher plate; 5. Vertical guide rail; 6. Hopper; 7. Part; 8. Guide plate; 9. Double-row tool post; 10. Receiving box; 11. Machine tool hydraulic station; 12. CNC machine tool spindle; 13. Positioning plate; 14. Air pipe; 15. Sensor; 16. Unloading cylinder; 17. Connecting sleeve; 18. Unloading rod; 19. Support sleeve; 20. Guide sleeve; 21. Sleeve; 22. Positioning sleeve; 23. Elastic clamp; 24. Tool; 25. Loading rod; 26. Loading cylinder; 27. Horizontal guide rail; 28. Air blowing block; 29. ​​Machine tool main air circuit; 30. Bus slot unit; 31. Square window. Detailed Implementation

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the part conveying device of the automatic loading and unloading device of the present invention is connected in the vertical direction of the CNC machine tool housing 1. The part conveying device is equipped with an anti-jamming device, which is connected to the CNC machine tool housing 1. The loading device and unloading device are respectively installed in the horizontal direction of the CNC machine tool housing 1, located on both sides of the part conveying device. The centers of the loading device and the unloading device are concentric and coincide with the center line of the CNC machine tool spindle 12. The positioning and clamping device is installed inside the CNC machine tool spindle 12. The blowing device is installed outside the hopper 6 of the part conveying device. The machine tool main air passage 29 is connected to the bus slot unit 30.

[0025] The hopper 6 of the parts conveying device is fixedly connected to the CNC machine tool housing 1. The hopper 6 can hold up to thirty parts 7. The hopper 6 is welded from thin-walled steel plates, and its width is approximately 20mm wider than the length of the parts 7. The bottom of the hopper 6 has a 15° inclination angle, and the discharge port has a tapered structure, allowing only one part 7 to slide out at a time. A square window 31 is opened on the side wall of the hopper 6 for the pusher plate 4 of the anti-jamming device to be pushed in. The guide plate 8, double-row tool holder 9, and receiving box 10 are connected to the vertical guide rail 5. The guide plate 8 has positioning grooves on it where parts 7 slide down the discharge port of the hopper 6 into the guide plate 8. The CNC machine tool control system can control the vertical guide rail servo motor of the machine tool. The rotation drives the ball screw transmission device to control the movement of the vertical guide rail 5, which in turn drives the guide plate 8, the double-row tool post 9, and the receiving box 10 to move. During loading, the positioning groove of the guide plate 8 is aligned with the center of the CNC machine tool spindle 12. In the horizontal direction, the guide plate 8 is aligned with the installation position of the hopper 6, and the guide plate 8 is wider than the hopper 6. When machining part 7, the tip of the tool 24 mounted on the double-row tool post 9 is at the same height as the center of the CNC machine tool spindle 12 in the vertical direction. The CNC machine tool control system controls the movement of the vertical guide rail 5 and the horizontal guide rail 27, which in turn drives the tip of the tool 24 to move. During unloading, the center of the receiving box 10 is aligned with the center of the CNC machine tool spindle 12.

[0026] The blowing device can blow off impurities on the guide plate 8. The air blowing block 28 is installed on the right side of the hopper 6 and is connected to the CNC machine tool housing 1 by a thread. It is connected to the machine tool's main air passage 29 by an air pipe 14. The air outlet of the air blowing block 28 faces the guide plate 8.

[0027] The support plate 3 of the anti-jamming device is connected to the CNC machine tool housing 1 by a thread. The pusher cylinder 2 is installed on the support plate 3 and is connected to the pusher plate 4 by a thread. The air pipe 14 connects the machine tool's main air passage 29 to the pusher cylinder 2, providing power to the pusher cylinder 2 and causing the pusher plate 4 to reciprocate, thus organizing the parts 7 piled up at the outlet in the hopper 6 into a vertical row, achieving the purpose of preventing the parts 7 from jamming in the hopper 6.

[0028] The feeding cylinder 26 of the feeding device is connected to the sensor 15 and the air pipe 14. The feeding cylinder 26 is connected and positioned to the CNC machine tool housing 1 through the positioning plate 13. The feeding cylinder 26 extends out and is suspended outside the CNC machine tool body. The feeding cylinder 26 is connected to the machine tool's main air circuit 29 through the air pipe 14 to provide power to the feeding cylinder 26. The feeding rod 25 is connected to the feeding cylinder 26 through the connecting sleeve 17. The connecting sleeve 17 is threadedly connected to the feeding cylinder 26, and the feeding rod 25 is fitted into the connecting sleeve 17 through an interference fit. During the feeding process, the feeding rod 25 is pushed out by the feeding cylinder 26, passes through the guide plate 8, and pushes the part 7 into the elastic clamp 23.

[0029] The elastic clamping sleeve 23 of the positioning and clamping device is threadedly connected to the sleeve 21. The positioning sleeve 22 is fitted inside the sleeve 21 with an interference fit. The sleeve 21 is installed inside the CNC machine tool spindle 12. When the CNC machine tool spindle 12 clamps, it deforms the elastic clamping sleeve 23 to clamp the part 7. The CNC machine tool spindle 12 drives the elastic clamping sleeve 23 and the part 7 to rotate. The vertical guide rail 5 is controlled by the CNC machine tool control system to rotate the machine tool's horizontal guide rail servo motor, which drives the ball screw transmission device to control the horizontal guide rail 27 to move, and at the same time drives the vertical guide rail 5 mounted on the horizontal guide rail 27 to move. The vertical guide rail servo motor of the machine tool is also controlled by the CNC machine tool control system to rotate, which drives the ball screw transmission device to control the vertical guide rail 5 to move, and at the same time drives the double-row tool post 9 to move, so as to achieve precise positioning of the tool 24.

[0030] The unloading cylinder 16 of the unloading device is connected to the sensor 15 and the air pipe 14. The unloading cylinder 16 is connected and positioned to the CNC machine tool housing 1 through the positioning plate 13. The unloading cylinder 16 extends out and is suspended outside the CNC machine tool body. The unloading cylinder 16 is connected to the machine tool's main air circuit 29 through the air pipe 14 to provide power to the unloading cylinder 16. The unloading rod 18 is connected to the unloading cylinder 16 through the connecting sleeve 17. The connecting sleeve 17 is threadedly connected to the unloading cylinder 16. The unloading rod 18 is fitted into the connecting sleeve 17 through an interference fit. A support sleeve 19 is fitted on the unloading rod 18 to ensure that when the unloading rod 18 moves laterally within the sleeve 21, the center of the unloading rod 18 does not deviate from the center of the CNC machine tool spindle 12 within the error range. During the unloading process, the unloading rod 18 passes through the guide sleeve 20, pushing the part 7 out of the sleeve 21 and dropping it into the receiving box 10.

[0031] The automatic loading and unloading device includes a vertical guide rail 5, a horizontal guide rail 27, a CNC machine tool spindle 12, a double-row tool post 9, a loading cylinder 26, an unloading cylinder 16, a pushing cylinder 2, an elastic clamp 23, a sensor 15, a machine tool main air circuit 29, and a machine tool hydraulic station 11, all connected to the CNC machine tool control system.

[0032] The operating procedure of the automatic loading and unloading device of the present invention is as follows: (1) Discharge: The operator takes part 7 from the processing area and places it in the hopper 6. Part 7 slides into the discharge port along the inclination of the hopper 6 and is stacked in a row.

[0033] (2) Material picking: Start the CNC machine tool control system, the vertical guide rail 5 moves downward, driving the guide plate 8, double-row tool post 9 and receiving box 10 to move downward synchronously; at the same time, the CNC machine tool control system controls the air to be supplied to the pneumatic circuit of the air blowing block 28, the air blowing block 28 blows air onto the guide plate 8, blowing off the residual iron filings; when the guide plate 8 moves to be aligned with the discharge port of the hopper 6, the pneumatic circuit of the air blowing block 28 is closed and the air blowing stops; at the same time, the CNC machine tool control system controls the air to be supplied to the pneumatic circuit of the pusher cylinder 2, the pusher cylinder 2 drives the pusher plate 4 to reciprocate, so that the stacked parts 7 are subjected to force and produce a small range of displacement, and rearranged into a row under the action of gravity to prevent them from getting stuck in the discharge port of the hopper 6; when there are no parts 7 stuck in the hopper 6, the parts 7 slide down along the discharge port into the positioning groove of the guide plate 8, completing the material picking action. Since the guide plate 8 and the hopper 6 are basically aligned in the horizontal direction, and the guide plate 8 is slightly wider than the hopper 6, the part 7 will not fall out of the hopper 6 at locations other than the positioning groove of the guide plate 8.

[0034] (3) Feeding: After the guide plate 8 stays at the discharge port of the hopper 6 for 5 seconds, under the control of the CNC machine tool control system, the pneumatic circuit of the pusher cylinder 2 is closed to stop pushing; the CNC machine tool control system controls the vertical guide rail 5 to move downward, driving the guide plate 8, the double-row tool post 9, and the receiving box 10 to move downward synchronously. When the positioning groove of the guide plate 8 is aligned with the center of the CNC machine tool spindle 12, the vertical guide rail 5 stops moving; at the same time, the CNC machine tool control system controls the pneumatic circuit of the upward feeder cylinder 26 to be open. When the push rod of the feeding cylinder 26 is pushed out, it drives the feeding rod 25 to move to the left along the CNC machine tool spindle 12, passing through the positioning groove of the guide plate 8, and pushing the part 7 into the elastic clamp 23 installed in the CNC machine tool spindle 12. At the same time, it passes through the positioning sleeve 22 installed in the sleeve 21 for positioning. After the feeding cylinder 26 is pushed out to its maximum stroke, it stays for 5 seconds and then retracts, driving the feeding rod 25 to move to the right. When the sensor 15 detects that the push rod of the feeding cylinder 26 has retracted, the feeding action is completed.

[0035] (4) Clamping Process: After the loading rod 25 is retracted, the CNC machine tool control system starts the machine tool hydraulic station 11, and the chuck of the CNC machine tool spindle 12 drives the elastic clamp 23 to retract, clamping the part 7. The spindle starts to rotate, and the CNC machine tool control system controls the rotation of the machine tool's transverse guide servo motor, which drives the ball screw transmission device to control the movement of the transverse guide 27, and at the same time drives the movement of the vertical guide 5. The CNC machine tool control system controls the rotation of the machine tool's vertical guide servo motor, which drives the ball screw transmission device to control the movement of the vertical guide 5, and at the same time drives the movement of the double-row tool post 9, realizing the precise positioning of the tool 24 and executing the machining program of the part 7. During the machining process, since the displacement of the vertical guide 5 and the transverse guide 27 is much smaller than the length of the part 7, the part 7 will not fall out of the hopper 6 during the machining process.

[0036] (5) Unloading: After part 7 is processed, the spindle chuck is released and the elastic clamp 23 releases part 7; the CNC machine tool control system controls the vertical guide rail 5 to move upward, driving the guide plate 8, double-row tool post 9, and receiving box 10 to move upward synchronously. When the center of the receiving box 10 is aligned with the center of the CNC machine tool spindle 12, the movement stops; the CNC machine tool control system controls the pneumatic circuit of the unloading cylinder 16 to be ventilated, the push rod of the unloading cylinder 16 is pushed out, driving the unloading rod 18 to move to the right along the CNC machine tool spindle 12. The unloading rod 18 passes through the guide sleeve 20 installed in the sleeve 21, and the part 7 is taken out from the sleeve 21, passes through the elastic clamp 23, flies out by the inertia of the part 7, and falls into the receiving box 10. The receiving box 10 can hold a maximum of twelve parts 7, thus completing the unloading action.

[0037] (6) Cyclic processing: After the unloading is completed, the actions of picking up, loading, clamping, and unloading are repeated. The processed parts 7 are piled in the receiving box 10 and can be taken out by the operator at any time.

Claims

1. An automatic loading and unloading device for automotive rocker arm shafts, characterized in that: The parts conveying device of the automatic loading and unloading device is connected to the vertical direction of the CNC machine tool housing (1). The parts conveying device is equipped with an anti-jamming device, which is connected to the CNC machine tool housing (1). The loading device and unloading device are respectively installed in the horizontal direction of the CNC machine tool housing (1), located on both sides of the parts conveying device. The centers of the loading device and the unloading device are concentric and coincide with the center line of the CNC machine tool spindle (12). The positioning and clamping device is installed inside the CNC machine tool spindle (12). The blowing device is installed outside the hopper (6) of the parts conveying device. The hopper (6) of the part conveying device is fixedly connected to the CNC machine tool housing (1). The hopper (6) is welded from thin-walled steel plate and its width is 20mm wider than the length of the part (7). The bottom of the hopper (6) is inclined at 15°. The discharge port is a constricted structure that only allows a single part (7) to slide out. The side wall of the hopper (6) has a square window (31) for the pusher plate (4) of the anti-jamming device to be pushed in. The guide plate (8), double-row tool holder (9), and receiving box (10) are connected to the vertical guide rail (5). The guide plate (8) has a positioning groove on which the part (7) slides down along the discharge port of the hopper (6) into the guide plate (8). The vertical guide rail (5) The guide plate (8), double-row tool holder (9), and receiving box (10) are driven to move. When loading, the positioning groove of the guide plate (8) is aligned with the center of the CNC machine tool spindle (12). In the horizontal direction, the guide plate (8) is aligned with the installation position of the hopper (6). The guide plate (8) is wider than the hopper (6). When processing the part (7), the tip of the tool (24) installed on the double-row tool holder (9) is at the same height as the center of the CNC machine tool spindle (12) in the vertical direction. The vertical guide rail (5) and the horizontal guide rail (27) are controlled by the CNC machine tool control system to move, thereby driving the tool (24) to move. When unloading, the center of the receiving box (10) is aligned with the center of the CNC machine tool spindle (12).

2. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The air blowing block (28) of the blowing device is installed on the right side of the hopper (6) and is connected to the CNC machine tool housing (1) by a thread. It is connected to the machine tool's main air passage (29) by an air pipe (14). The air outlet of the air blowing block (28) faces the guide plate (8).

3. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The support plate (3) of the anti-jamming device is connected to the CNC machine tool housing (1) by a thread. The pusher cylinder (2) is installed on the support plate (3) and the pusher plate (4) is connected by a thread. The air pipe (14) connects the machine tool's main air circuit (29) to the pusher cylinder (2) to provide power to the pusher cylinder (2) so that the pusher plate (4) can reciprocate and arrange the parts (7) piled up in the hopper (6) at the outlet into a vertical row.

4. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The feeding cylinder (26) of the feeding device is connected to the sensor (15) and the air pipe (14). The feeding cylinder (26) is connected and positioned to the CNC machine tool housing (1) through the positioning plate (13). The feeding cylinder (26) extends out and hangs outside the CNC machine tool body. The feeding cylinder (26) is connected to the machine tool's main air circuit (29) through the air pipe (14) to provide power to the feeding cylinder (26). The feeding rod (25) is connected to the feeding cylinder (26) through the connecting sleeve (17). The connecting sleeve (17) is threadedly connected to the feeding cylinder (26). The feeding rod (25) is fitted into the connecting sleeve (17) through an interference fit.

5. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The elastic clamping sleeve (23) of the positioning clamping device is threadedly connected to the sleeve (21), and the positioning sleeve (22) is fitted inside the sleeve (21) by interference fit. The sleeve (21) is installed inside the spindle (12) of the CNC machine tool.

6. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The feeding cylinder (16) of the feeding device is connected to the sensor (15) and the air pipe (14). The feeding cylinder (16) is connected and positioned to the CNC machine tool housing (1) through the positioning plate (13). The feeding cylinder (16) extends out and hangs outside the CNC machine tool body. The feeding cylinder (16) is connected to the machine tool's main air circuit (29) through the air pipe (14) to provide power to the feeding cylinder (16). The feeding rod (18) is connected to the feeding cylinder (16) through the connecting sleeve (17). The connecting sleeve (17) is threaded to the feeding cylinder (16). The feeding rod (18) is fitted into the connecting sleeve (17) through an interference fit. The feeding rod (18) is fitted with a support sleeve (19) to ensure that when the feeding rod (18) moves laterally in the sleeve (21), the center of the feeding rod (18) is offset from the center of the CNC machine tool spindle (12) within the error range.

7. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The vertical guide rail (5) is controlled by the CNC machine tool control system to rotate the horizontal guide rail servo motor of the machine tool, which drives the ball screw transmission device to control the horizontal guide rail (27) to move, and at the same time drives the vertical guide rail (5) mounted on the horizontal guide rail (27) to move; the vertical guide rail servo motor of the machine tool is controlled by the CNC machine tool control system to rotate, which drives the ball screw transmission device to control the vertical guide rail (5) to move, and at the same time drives the double-row tool post (9) to move, so as to achieve precise positioning of the tool (24).

8. The automatic loading and unloading device for automotive rocker arm shafts according to claim 1, characterized in that: The automatic loading and unloading device is connected to the CNC machine tool control system via the vertical guide rail (5), the horizontal guide rail (27), the CNC machine tool spindle (12), the double-row tool post (9), the loading cylinder (26), the unloading cylinder (16), the pushing cylinder (2), the elastic clamp (23), the sensor (15), the machine tool main air circuit (29), and the machine tool hydraulic station (11).

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