Full-automatic machining device and method for engine rocker arm

Abstract

The application discloses a kind of numerical control lathe device and method of engine rocker arm full-automatic processing, it is characterized in that including for controlling the automatic operation of entire device controller, for stacking workpiece and automatically feeding workpiece automatic feeder, for processing workpiece machine tool, setting on workpiece clamping clamp of machine tool and for workpiece taking, discharging and transfer work transfer device.The invention operator only needs to place the workpiece to be processed on the automatic feeder and take the finished workpiece from the finished product output device, without manual clamping, positioning, processing, shipping and other processes, fully automatic production, high degree of automation, high production efficiency, low labor intensity and low labor demand.

Description

Technical Field

[0001] This invention relates to fully automated machining of engine rocker arms, specifically to a CNC lathe apparatus and method for fully automated machining of engine rocker arms. Background Technology

[0002] The engine rocker arm is a key component in the valve train of an internal combustion engine. Its machining accuracy directly affects the engine's performance and service life. Rocker arms usually have complex shapes and multi-angle hole structures. Traditional machining methods mostly rely on manual operation of ordinary lathes or semi-automatic equipment for multi-step machining.

[0003] In the existing technology, the processing of rocker arms usually requires multiple processes, such as end face turning, internal hole processing, inclined hole drilling, tapping, and milling. Each process requires manual clamping, positioning, and transfer of the workpiece. However, relying on manual loading and unloading, and each process requires separate clamping and processing, manual operation is cumbersome, labor-intensive, and has low production efficiency. Furthermore, multiple clamping operations are prone to errors, affecting the consistency of batch products. Furthermore, when machining inclined holes on the inner wall of the rocker arm, the drill bit is in an inclined state, and the inner hole wall is curved, which easily causes the drill bit to slip, deviate, or even break when it comes into contact with the inner hole wall, seriously affecting the product machining quality and reducing tool life. To address this, a CNC lathe device and method for fully automated machining of engine rocker arms are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a CNC lathe device and method for fully automatic machining of engine rocker arms in order to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CNC lathe device for fully automatic machining of engine rocker arms, characterized in that it includes a controller for controlling the automatic operation of the entire device, an automatic feeder for stacking and automatically feeding workpieces, a machine tool for machining workpieces, a fixture set on the machine tool for clamping workpieces, and a transfer device for picking up, placing and transferring workpieces. The machine tool includes a first-process machine tool for machining the workpiece in the first operation and a second-process machine tool for machining the workpiece in the second operation; the machine tool is equipped with a power turret, on which are mounted several cutting tools and power cutting heads for machining the workpiece; The fixture includes a first-process fixture and a second-process fixture. The first-process fixture includes a chuck mounted on the spindle of the first-process machine tool, jaws mounted on the chuck for holding the workpiece, a positioning seat mounted on the chuck for positioning the workpiece, and a drill jig that guides and supports the drill bit when drilling the workpiece to prevent the drill bit from slipping and causing the hole position to shift or even break when drilling at an angle. The drill jig has a die hole aligned with the hole position of the workpiece. The spindle is equipped with a driver for driving the drill jig to move, and the driver is connected to a drive rod that is connected to the drill bit. The positioning seat is provided with positioning elements that position the workpiece on the fixture; The second-process fixture includes a chuck mounted on the second-process machine tool, an internal expansion chuck mounted on the chuck for holding the workpiece, and a limiting support mounted on the chuck to limit the workpiece clamping position.

[0006] More preferably, the automatic feeder includes a material rack, a sprocket rotatably connected to the material rack, a motor mounted on the material rack for driving the sprocket to rotate, a chain connected to the sprocket, a material seat mounted on the chain, several material slots on the material seat corresponding to the workpiece, and a sensor mounted on the material rack for sensing whether there is a workpiece at the feeding position of the automatic feeder.

[0007] More preferably, the transfer device includes a transfer frame and a plurality of robotic arms connected to the transfer frame for driving the workpiece to move; the robotic arms include robotic arm one for taking the workpiece from the automatic feeder and moving it to a machine tool for processing the workpiece in the first process and completing the unloading, and robotic arm two for moving the workpiece that has completed the first process to a machine tool for processing the workpiece in the second process and unloading the processed workpiece.

[0008] More preferably, the robotic arm includes a movable frame slidably mounted on a transfer frame, a transverse moving motor mounted on the movable frame, a gear mounted on the transverse moving motor, a longitudinal moving frame slidably mounted on the movable frame, a longitudinal moving motor mounted on the movable frame, a gear mounted on the longitudinal moving motor, and a rack mounted on the longitudinal moving frame that meshes with the gear mounted on the longitudinal moving motor; the transfer frame is equipped with a rack that meshes with the gear on the transverse moving motor.

[0009] A further preferred embodiment includes a transfer and gripping mechanism disposed on a longitudinal moving frame; the transfer and gripping mechanism includes a rotary cylinder mounted on the longitudinal moving frame, a rotary frame connected to the rotary cylinder, and two grippers disposed vertically on the rotary frame; The gripper includes a gripping cylinder, an internal expansion jaw mounted on the gripping cylinder for gripping the inner hole of the workpiece, or an external jaw for gripping the outer end of the workpiece.

[0010] A further preferred embodiment includes a positioning frame disposed on the longitudinal moving frame of the second robot, a positioner mounted on the positioning frame, and an adjusting rod connected to the positioner and driven by the positioner to push the workpiece and adjust the position of the workpiece mounted on the fixture.

[0011] A further preferred embodiment includes a workpiece adjustment mechanism disposed between the first-process machine tool and the second-process machine tool for adjusting the angle position of the workpiece; The workpiece adjustment mechanism includes an adjustment frame, a detection table mounted on the adjustment frame, a workpiece positioning component set on the detection table, a workpiece positioning groove on the workpiece positioning component corresponding to the workpiece, a flipping cylinder mounted on the adjustment frame for driving the workpiece to flip, a flipping frame connected to the flipping cylinder, a clamping cylinder connected to the flipping frame for clamping the workpiece, and a sensor set on the detection table for sensing the workpiece.

[0012] A further preferred embodiment includes a finished product conveyor for storing and outputting finished workpieces. The finished product conveyor includes a finished product conveyor frame, a motor mounted on the finished product conveyor frame, a drive roller connected to the finished product conveyor frame and driven by the motor, a driven roller connected to the finished product conveyor frame, and a conveyor belt connected to the drive roller and the driven roller. The finished product conveyor frame is also equipped with a sensor for sensing whether a finished workpiece exists at the end of the conveyor belt.

[0013] A further preferred embodiment includes an inner diameter detection machine that detects the inner diameter of the workpiece after it has been processed by the first machine tool and feeds the detection results back to the controller. The controller then controls the machine tool system to automatically correct the tool compensation based on the detection results, as well as a defective product collection box for collecting defective products.

[0014] A method for fully automated machining of engine rocker arms, characterized by the following specific steps: a. First, the operator positions several workpieces to be processed in the material slot of the material holder; b. The automatic feeder is controlled by the controller to move the workpiece to the loading position; c. After the sensor detects the workpiece, it sends a signal to the controller. The controller then controls the robot arm to move to the loading position and grab the workpiece at the loading position. d. After moving the workpiece into the machine tool of the first process, the workpiece is clamped by a fixture; e. The controller starts the machine tool for the first process to machine the inner hole and one end face of the workpiece; f. After the inner hole and end face are machined, control the driver to push the drive rod. The drive rod drives the drill jig to extend into the inner hole of the workpiece, which plays a guiding, supporting and positioning role for the drill bit to drill an inclined hole in the inner hole. g. Then control the drilling process on the workpiece; h. After the first process is completed, the controller controls the robot arm to remove the workpiece and place it into the workpiece positioning slot of the workpiece positioning component; i. Then control the tilting cylinder to drive the tilting frame and clamping cylinder to rotate 90°. After clamping the workpiece with the clamping cylinder, control the tilting cylinder to drive the workpiece to rotate 90°. j. Then, control the second robotic arm to remove the workpiece from the clamping cylinder and place it on the inner diameter measuring machine. The inner diameter measuring machine will then measure the inner diameter of the workpiece and send the measurement data to the controller. k. The controller automatically adjusts the tool compensation based on the detection results; l. And determine whether the size exceeds the set value according to the test results. If it exceeds the set value, the workpiece is clamped by the robot and placed in the non-conforming product collection box. If the test is qualified, the workpiece is clamped and moved to the second process machine tool. m. After the robot arm places the workpiece onto the second process fixture, it slightly clamps the workpiece with the internal expansion chuck; then it starts the positioner, and the positioner pushes the adjusting rod downward. During the downward movement, the adjusting rod contacts one side of the workpiece and pushes the workpiece to rotate until one end of the workpiece contacts the limiting support, thus completing the positioning of the workpiece. Then it controls the internal expansion chuck to clamp the workpiece. n. Then control the second-stage machine tool to process the workpiece; o. After processing is completed, the second robotic arm is controlled to remove the processed workpiece and place it on the finished product conveyor for output; p. When the sensor installed on the finished product conveyor frame detects the workpiece, it sends a signal to the controller. The controller then controls the finished product conveyor to stop and sends a signal to the operator to remove the finished workpiece from the finished product conveyor.

[0015] The beneficial effects of this invention are as follows: With the setting of this device, the operator only needs to place the workpiece to be processed on the automatic feeder and remove the processed workpiece from the finished product output device. There is no need for manual clamping, positioning, processing, and transportation. It is a fully automatic production with a high degree of automation, high production efficiency, low labor intensity and low labor requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural schematic diagram of the machine tool used in the first process of this invention; Figure 3 This is a schematic diagram of the structure of the fixture for the first process in this invention; Figure 4 This is a schematic diagram of the structure of the fixture for the first process in this invention; Figure 5 This is a partial cross-sectional structural diagram of the machine tool in the first process of this invention; Figure 6 This is a schematic diagram of the structure of the fixture for the second process in this invention; Figure 7 This is a schematic diagram of the automatic feeder in this invention; Figure 8 This is a partial structural diagram of the automatic feeder in this invention; Figure 9 This is a partial structural schematic diagram of the transfer frame in this invention; Figure 10 This is a partial structural schematic diagram of the robotic arm in this invention; Figure 11 This is a schematic diagram of the structure of the robotic arm's upward transfer and gripping mechanism in this invention; Figure 12 This is a schematic diagram of the transfer and gripping mechanism of the robotic arm II in this invention; Figure 13 This is a partial structural diagram of the present invention; Figure 14 This is a schematic diagram of the workpiece adjustment mechanism in this invention; Figure 15 This is a schematic diagram of the finished product conveyor in this invention; Figure 16 This is a partial structural schematic diagram of the finished product conveyor in this invention.

[0017] Legend: 1. Automatic feeder; 11. Material rack; 12. Sprocket; 13. Motor; 14. Chain; 15. Material holder; 16. Material trough; 17. Sensor; 2. Transfer device; 21. Transfer frame; 22. Robot arm one; 23. Robot arm two; 24. Moving frame; 25. Lateral movement motor; 26. Gear; 27. Longitudinal movement frame; 28. Longitudinal movement motor; 29. ​​Rack; 3. First-process machine tool; 31. First-process fixture; 32. Chuck; 33. Gripper; 34. Positioning seat; 35. Drill jig; 36. Die hole; 37. Driver; 38. Drive rod; 39. Positioning component; 4. Second-process machine tool; 41. Second-process... 42. Clamp; 43. Internal expansion chuck; 5. Limiting support; 5. Transfer and clamping mechanism; 51. Rotary cylinder; 52. Rotating frame; 53. Clamping device; 531. Clamping cylinder; 532. Internal expansion jaw; 533. External jaw; 6. Positioning frame; 61. Positioner; 62. Adjusting rod; 7. Workpiece adjustment mechanism; 71. Adjusting frame; 72. Inspection table; 73. Workpiece positioning component; 74. Workpiece positioning groove; 75. Tilting cylinder; 76. Tilting frame; 77. Clamping cylinder; 8. Finished product conveyor; 81. Finished product conveyor frame; 82. Driven roller; 83. Driven roller; 831. Conveyor belt; 9. Inner diameter inspection machine; 10. Non-conforming product collection box. Detailed Implementation

[0018] The following description, in conjunction with the accompanying drawings, further illustrates the CNC lathe device and method for fully automated machining of engine rocker arms according to the present invention.

[0019] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] See Figures 1-16 As shown, a CNC lathe device for fully automatic machining of engine rocker arms is characterized by including a controller for controlling the automatic operation of the entire device, an automatic feeder 1 for stacking and automatically feeding workpieces, a machine tool for machining workpieces, a fixture set on the machine tool for clamping workpieces, and a transfer device 2 for picking up, placing and transferring workpieces. The machine tool includes a first-process machine tool 3 for machining the workpiece in the first process and a second-process machine tool 4 for machining the workpiece in the second process; the machine tool is equipped with a power turret, which is equipped with several cutting tools and power cutting heads for machining the workpiece. The cutting tools include external turning tools and internal turning tools, and the power cutting heads include drilling power cutting heads, tapping power cutting heads and milling power cutting heads. The fixture includes a first process fixture 31 and a second process fixture 41. The first process fixture 31 includes a chuck 32 mounted on the spindle of the first process machine tool 3, a jaw 33 mounted on the chuck 32 for holding the workpiece, a positioning seat 34 mounted on the chuck 32 for positioning the workpiece, and a drill jig 35 that guides and supports the drill bit when drilling the workpiece to prevent the drill bit from slipping and causing the hole position to shift or even break when drilling at an angle. The drill jig 35 is provided with a die hole 36 aligned with the hole position of the workpiece. The first-process machine tool 3 is also equipped with a driver 37 for driving the drill jig 35 to move. The driver 37 is connected to a drive rod 38 connected to the drill jig 35. The driver 37 can be a cylinder, which drives the drill jig 35 to move back and forth through the drive rod 38. The positioning seat 34 is provided with a positioning element 39 that positions the workpiece on the fixture. By setting the positioning element 39, when installing the workpiece, the positioning element 39 abuts against one end face of the workpiece, thereby limiting the axial position of the workpiece installed on the fixture; The second-process fixture 41 includes a chuck 32 mounted on the second-process machine tool 4, an inner expansion chuck 42 mounted on the chuck 32 for holding the workpiece, and a limiting support 43 mounted on the chuck 32 to limit the workpiece clamping position. By setting the limiting support 43, after the workpiece is mounted on the inner expansion chuck 42, one end of the workpiece rests on the limiting support 43, thereby limiting the circumferential position of the workpiece mounted on the inner expansion chuck 42 and avoiding deviations in the workpiece mounting angle that could affect the machining position. With the setup of this device, operators only need to place the workpiece to be processed on the automatic feeder 1 and remove the processed workpiece from the finished product output device. There is no need for manual clamping, positioning, processing, or transportation. It is a fully automatic production system with a high degree of automation, high production efficiency, low labor intensity, and low manpower requirements.

[0022] In one embodiment, the automatic feeder 1 includes a material rack 11, a sprocket 12 rotatably connected to the material rack 11, a motor 13 mounted on the material rack 11 for driving the sprocket 12 to rotate, a chain 14 connected to the sprocket 12, a material seat 15 mounted on the chain 14, a plurality of material slots 16 disposed on the material seat 15 corresponding to the workpiece, and a sensor 17 mounted on the material rack 11 for sensing whether the loading position of the automatic feeder 1 has a workpiece; the sensor can be any one of a contact sensor, an infrared sensor, or a photoelectric sensor, and a sensing block can be set on the material seat, and the sensor senses the sensing block to sense whether the material seat is in the loading position. The motor 13 and the sprocket 12 can be driven by a chain 14. A transmission sprocket 12 for transmission is provided on the output shaft of the motor 13 and the sprocket 12, and a chain 14 is installed on the transmission sprocket 12. With the automatic feeder 1 set up, the operator only needs to place the workpiece to be processed into several material troughs 16. When the automatic feeder 1 automatically feeds: by starting the motor 13, the motor 13 drives the sprocket 12 to rotate, the sprocket 12 drives the chain 14 to move, and the chain 14 drives the material seat 15 and several workpieces on the material seat 15 to move. When the sensor 17 at the feeding position senses a workpiece, it sends a signal to the controller. The controller controls the robot arm 22 to move to the feeding position to grab the workpiece. When all the workpieces in a row have been grabbed, the sensor 17 no longer senses a workpiece and sends a signal to the controller. The controller controls the motor 13 to start, driving the material seat 15 to move forward one station. When the sensor 17 senses a workpiece, it sends a signal to the controller. The controller controls the robot arm 22 to move to the feeding position to grab the workpiece.

[0023] In one embodiment, the transfer device 2 includes a transfer frame 21 and a plurality of robotic arms connected to the transfer frame 21 for driving the workpiece to move; the robotic arms include a first robotic arm 22 that picks up the workpiece from the automatic feeder 1 and moves it to a machine tool for processing the workpiece in the first process and completes the unloading, and a second robotic arm 23 that moves the workpiece that has completed the first process to a machine tool for processing the workpiece in the second process and unloads the processed workpiece. The robotic arm 22 is used to pick up the workpiece from the automatic feeder 1 and move it to the first process machine tool 3 for processing. After processing, the workpiece is removed and moved to the workpiece adjustment mechanism 7. The second robotic arm 23 is used to grab the workpiece from the workpiece adjustment mechanism 7 and place it on the inner diameter inspection machine 9. After inspection, the workpiece is placed into the unqualified collection box or moved to the second process machine tool 4 according to the inspection results. After processing, the workpiece is removed from the second process machine tool 4 and placed on the finished product conveyor 8 for output.

[0024] In one embodiment, the robotic arm includes a movable frame 24 slidably mounted on a transfer frame 21, a transverse movement motor 25 mounted on the movable frame 24, a gear 26 mounted on the transverse movement motor 25, a longitudinal movement frame 27 slidably mounted on the movable frame 24, a longitudinal movement motor 28 mounted on the movable frame 24, a gear 26 mounted on the longitudinal movement motor 28, and a rack 29 mounted on the longitudinal movement frame 27 that meshes with the gear 26 mounted on the longitudinal movement motor 28; the transfer frame 21 is equipped with a rack 29 that meshes with the gear 26 on the transverse movement motor 25. When the robotic arm is in motion: When moving laterally, the lateral movement motor 25 is started. The lateral movement motor 25 drives the gear 26 installed on the lateral movement motor 25 to rotate. The gear 26 meshes with the rack 29 installed on the transfer frame 21, which drives the moving frame 24 to move laterally on the transfer frame 21. During longitudinal movement, the longitudinal movement motor 28 is started, which drives the gear 26 mounted on the longitudinal movement motor 28 to rotate. The gear 26 mounted on the longitudinal movement motor 28 drives the longitudinal movement frame 27 to move up and down by meshing with the rack 29 mounted on the longitudinal movement frame 27.

[0025] In one embodiment, a transfer clamping mechanism 5 is also provided on the longitudinal moving frame 27; the transfer clamping mechanism 5 includes a rotary cylinder 51 mounted on the longitudinal moving frame 27, a rotary frame 52 connected to the rotary cylinder 51, and two clamps 53 arranged vertically on the rotary frame 52. The rotary cylinder 51 is used to drive the two grippers 53 to rotate, thereby adjusting the position of the gripped workpiece. During material handling and loading, one gripper removes the finished workpiece. After removal, the rotary cylinder 51 drives the rotating frame 52 to rotate, switching the positions of the two grippers 53. Then, the workpiece held by the other gripper 53 can be moved to the fixture for clamping. The material handling and unloading can be switched according to the placement and clamping angle of the workpiece. Furthermore, only 22 strokes of the robotic arm are needed for loading and unloading. There is no need for the robotic arm to place the finished workpiece on the subsequent process line after removal, and then move back to the workpiece to be processed for further handling. The workpiece to be processed is moved into the machine tool for clamping and processing. The robot arm only needs to grab the workpiece to be processed and wait for the machine tool to complete the processing of the previous workpiece. After the previous workpiece is processed, the robot arm controls one of the grippers 53 to remove the processed workpiece. Then, the gripper 53 is rotated by the rotary cylinder 51 so that the gripper 53 holding the workpiece to be processed corresponds to the fixture. Then the workpiece to be processed is moved to the fixture for clamping. Then the processed workpiece is placed in the next process. Then the workpiece to be processed is grabbed again and waits for the machine tool to complete the processing of the previous workpiece. The cycle is repeated, which effectively reduces the time for robot arm to transfer and the time for machine tool to stop waiting, thus improving production efficiency.

[0026] The gripper 53 includes a gripping cylinder 531, an inner expansion jaw 532 mounted on the gripping cylinder 531 for gripping the inner hole of the workpiece, or an outer jaw 533 for gripping the outer end of the workpiece. The gripper 53 of the first robot 22 has an inner expanding jaw 532, which is used to grip the inner hole of the workpiece; the gripper 53 of the second robot 23 has an outer jaw 533, which is used to grip the outside of the workpiece.

[0027] In one embodiment, it also includes a positioning frame 6 disposed on the longitudinal moving frame 27 of the second manipulator 23, a positioner 61 mounted on the positioning frame 6, and an adjusting rod 62 connected to the positioner 61 and driven by the positioner 61 to push the workpiece and adjust the position of the workpiece mounted on the fixture. The positioner 61 can be a cylinder. After the workpiece is installed on the inner expansion chuck 42 of the second-process machine tool 4, the positioner 61 is activated. The positioner 61 drives the adjusting rod 62 to move downward. During the downward movement, the adjusting rod 62 contacts one side of the workpiece and forms a downward thrust, pushing the workpiece to rotate until the lower end of one side of the workpiece abuts against the limiting support, thus completing the adjustment and positioning of the workpiece's circumferential position. After the positioning adjustment is completed, the inner expansion chuck 42 is controlled to clamp the workpiece. The positioner 61 and the adjusting rod 62 are used to push the workpiece to rotate based on the axis. With the positioning support of the limiting support, the circumferential position of the workpiece is adjusted and its circumferential position is limited, ensuring that the machining accuracy is not affected by the deviation of the workpiece during processing, and improving the consistency of batch products.

[0028] In one embodiment, a workpiece adjustment mechanism 7 is provided between the first process machine tool 3 and the second process machine tool 4 for adjusting the angle position of the workpiece. The workpiece adjustment mechanism 7 includes an adjustment frame 71, a detection table 72 mounted on the adjustment frame 71, a workpiece positioning component 73 set on the detection table 72, a workpiece positioning groove 74 corresponding to the workpiece set on the workpiece positioning component 73, a flipping cylinder 75 mounted on the adjustment frame 71 for driving the workpiece to flip, a flipping frame 76 connected to the flipping cylinder 75, a clamping cylinder 77 connected to the flipping frame 76 for clamping the workpiece, and a sensor 17 set on the detection table 72 for sensing the workpiece. The clamping cylinder 77 is equipped with a gripper 33. The sensor 17 can be either an infrared sensor or a photoelectric sensor. The workpiece adjustment mechanism 7 is used for workpiece reversal between the first process machine tool 3 and the second process machine tool 4. After the workpiece that has completed the first process is transported by the robot arm 22 to the clamping cylinder 77 of the workpiece adjustment mechanism 7, the flipping cylinder 75 drives the flipping frame 76, the clamping cylinder 77 and the workpiece to flip 90°, so that the side of the workpiece that has been processed is facing down and the side that has not been processed is facing up, and the workpiece is placed in the workpiece positioning groove 74. After sensor 17 detects that a workpiece is placed in workpiece positioning slot 74, it sends a signal to the controller. The controller controls robot arm 23 to grab the workpiece that has been flipped and is now in workpiece positioning slot 74 and transport it to the next process.

[0029] In one embodiment, the system further includes a finished product conveyor 8 for storing and outputting finished workpieces. The finished product conveyor 8 includes a finished product conveyor frame 81, a motor 13 mounted on the finished product conveyor frame 81, a drive roller 82 connected to the finished product conveyor frame 81 and driven by the motor 13, a driven roller 83 connected to the finished product conveyor frame 81, and a conveyor belt 831 connected to the drive roller 82 and the driven roller 83. The finished product conveyor frame 81 is also equipped with a sensor 17 for sensing whether a finished workpiece exists at the end of the conveyor belt 831. The sensor can be either an infrared sensor or a photoelectric sensor. The motor 13 and the drive roller 82 can be directly connected by a coupling or driven by a synchronous belt or chain 14. When the finished product conveyor 8 outputs a workpiece, it starts the motor 13, which drives the drive roller 82 to rotate. The drive roller 82 then drives the conveyor belt 831 to move. The conveyor belt 831 moves the workpiece on the conveyor belt 831. When the sensor 17 at the end of the finished product conveyor frame 81 senses the workpiece, it sends a signal to the controller. The controller controls the motor 13 to stop and sends a signal to the operator to remove the processed workpiece.

[0030] In one embodiment, the system further includes detecting the inner diameter of the workpiece after it has been processed by the first-process machine tool 3 and feeding the result back to the controller. The controller controls the machine tool system to automatically correct the tool offset of the inner diameter detection machine 9 and the defective product collection box 10 for collecting defective products based on the detection result. The inner diameter detection machine 9 is an existing inner diameter detection device for automatically detecting the inner diameter of the hole. It is used to detect the hole diameter of the processed workpiece. The specific structure will not be described in detail in this application. The inner diameter detection machine 9 sends the detection result to the controller. The controller determines whether the workpiece is qualified based on the detection result. If it is qualified, the robot arm removes the workpiece and moves it to the second-process machine tool 4 for subsequent processing. If it is unqualified, the robot arm removes the workpiece and places it in the defective product collection box 10. At the same time, the controller controls the first-process machine tool 3 system to correct the tool offset based on the detection result to ensure the dimensional accuracy of the subsequent product processing and avoid batches of unqualified products.

[0031] When using this invention: First, the operator positions several workpieces to be processed in the material groove 16 of the material holder 15; The controller starts the motor 13 on the automatic feeder 1. The motor 13 drives the sprocket 12 to rotate, and the sprocket 12 drives the chain 14 to move. The chain 14 drives the material seat 15 and the workpiece to move forward to the loading position. After the sensor 17 senses the workpiece, it sends a signal to the controller. The controller controls the motor 13 to stop working. Then the controller controls the robot arm 22 to move to the loading position and grab the workpiece in the loading position. When picking up the same row of workpieces on the material seat 15, the workpieces can be picked up from left to right or from right to left. After the robot arm 22 picks up the material again, it moves the workpiece to the first process machine tool 3 and clamps the workpiece through the first process fixture 31. After the robot arm 22 releases the workpiece, it moves to the automatic feeder 1 again to pick up the material. After the material is picked up, it moves to another first process machine tool 3 and clamps the workpiece through the first process fixture 31. After the robotic arm 22 releases the workpiece, it moves to the automatic feeder 1 again to pick up the workpiece. After picking up the workpiece, it moves to the first process machine tool 3 to wait for the previous workpiece to be processed. The first-process fixture 31 in the first-process machine tool 3 clamps the workpiece and, after the robot arm 22 moves out of the first-process machine tool 3, controls the first-process machine tool 3 to perform end face, inner hole, side inner hole and side hole machining on the workpiece; After the inner hole, end face, side inner hole and side hole are processed, the control driver 37 is started. The driver 37 pushes the drive rod 38 to move forward. The drive rod 38 then drives the drill jig 35 to extend into the inner hole of the workpiece, which plays a guiding, supporting and positioning role for the drill bit to drill an inclined hole in the inner hole. Then, the workpiece is controlled to be machined into a slanted hole. When drilling the slanted hole, the drill bit passes through the die hole 36 of the drill jig 35 and drills the slanted hole into the workpiece. The drill jig 35 plays a limiting and guiding role in the position of the drill bit, so as to prevent the drill bit from slipping due to tilting when it contacts the inner wall of the inner hole, which would cause scratches on the inner hole, misalignment of the hole, or even breakage of the drill bit. After all the machining processes of the first process machine tool 3 are completed, the controller controls the robot arm 22 to enter the first process machine tool 3 to remove the finished workpiece. Then, the controller controls the rotary cylinder 51 to start, and moves the workpiece to be processed to the position corresponding to the first process fixture 31. Then, the workpiece to be processed is moved to the first process fixture 31 and clamped by the first process fixture 31. The controller controls the robotic arm 22 to place the processed workpiece into the workpiece positioning groove 74 of the workpiece positioning component 73; Then control the tilting cylinder 75 to drive the tilting frame 76 and the clamping cylinder 77 to tilt 90°. After the workpiece is clamped by the clamping cylinder 77, control the tilting cylinder 75 to drive the workpiece to tilt 90°. Then, the robot arm 23 is controlled to remove the workpiece from the clamping cylinder 77 and place it on the inner diameter measuring machine 9. The inner diameter measuring machine 9 measures the inner diameter of the workpiece and sends the measurement data to the controller. The controller automatically adjusts the tool compensation based on the detection results. Furthermore, based on the test results, it is determined whether the size exceeds the set value. If it exceeds the set value, the workpiece is clamped by the robot arm 23 and placed in the defective product collection box. If the test is qualified, the workpiece is clamped and moved to the second process machine tool 4. After placing the workpiece onto the second-process fixture 41, the robot arm 23 slightly clamps the workpiece using the inner expansion chuck 42 and then releases the gripper 53 on the robot arm 23. Then, the positioner 61 is activated, and the positioner 61 pushes the adjusting rod 62 downward. During the downward movement, the adjusting rod 62 contacts one side of the workpiece and pushes the workpiece to rotate until one end of the workpiece contacts the limiting support 43, thus completing the positioning of the workpiece. Then, the inner expansion chuck 42 is controlled to clamp the workpiece. The controller controls the robot arm 23 to reset. Then, control the second process machine tool 4 to perform end face, side hole, side hole tapping and milling on the workpiece; After the second process machine tool 4 finishes processing the workpiece, it controls the second robot arm 23 to remove the processed workpiece and place it on the finished product conveyor 8 for output. The second robot arm 23 then places the processed workpiece on the finished product conveyor 8 and sends a signal to the controller. The controller controls the motor 13 on the finished product conveyor 8 to start. The motor 13 drives the drive roller 82 to rotate, and the drive roller 82 drives the conveyor belt 831 to move forward. The conveyor belt 831 drives the processed workpiece to move forward one station. When the sensor 17 installed on the finished product conveyor frame 81 senses the workpiece, it sends a signal to the controller. The controller then controls the finished product conveyor 8 to stop operating and sends a signal to the operator to remove the finished workpiece from the finished product conveyor 8.

[0032] The scope of protection of this invention is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this invention.

Claims

1. A CNC lathe device for fully automatic machining of engine rocker arms, characterized in that: It includes a controller for controlling the automatic operation of the entire device, an automatic feeder for stacking and automatically feeding workpieces, a machine tool for processing workpieces, a fixture set on the machine tool for clamping workpieces, and a transfer device for picking up, placing and transferring workpieces. The machine tool includes a first-process machine tool for machining the workpiece in the first operation and a second-process machine tool for machining the workpiece in the second operation; the machine tool is equipped with a power turret, on which are mounted several cutting tools and power cutting heads for machining the workpiece; The fixture includes a first-process fixture and a second-process fixture. The first-process fixture includes a chuck mounted on the spindle of the first-process machine tool, jaws mounted on the chuck for holding the workpiece, a positioning seat mounted on the chuck for positioning the workpiece, and a drill jig that guides and supports the drill bit when drilling the workpiece to prevent the drill bit from slipping and causing the hole position to shift or even break when drilling at an angle. The drill jig has a die hole aligned with the hole position of the workpiece. The first-process machine tool is also equipped with a driver for driving the drill jig to move, and the driver is connected to a drive rod connected to the drill jig. The positioning seat is provided with positioning elements that position the workpiece on the fixture; The second-process fixture includes a chuck mounted on the second-process machine tool, an internal expansion chuck mounted on the chuck for holding the workpiece, and a limiting support mounted on the chuck to limit the workpiece clamping position.

2. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 1, characterized in that: The automatic feeder includes a material rack, a sprocket rotatably connected to the material rack, a motor mounted on the material rack to drive the sprocket to rotate, a chain connected to the sprocket, a material seat mounted on the chain, several material slots on the material seat corresponding to the workpiece, and a sensor mounted on the material rack to sense whether there is a workpiece at the feeding position of the automatic feeder.

3. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 1, characterized in that: The transfer device includes a transfer frame and several robotic arms connected to the transfer frame for driving the workpiece to move. The robotic arms include robotic arm one for picking up the workpiece from the automatic feeder and moving it to a machine tool for processing the workpiece in the first process and completing the unloading, and robotic arm two for moving the workpiece that has completed the first process to a machine tool for processing the workpiece in the second process and unloading the processed workpiece.

4. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 3, characterized in that: The robotic arm includes a movable frame slidably mounted on a transfer frame, a transverse moving motor mounted on the movable frame, a gear mounted on the transverse moving motor, a longitudinal moving frame slidably mounted on the movable frame, a longitudinal moving motor mounted on the movable frame, a gear mounted on the longitudinal moving motor, and a rack mounted on the longitudinal moving frame that meshes with the gear mounted on the longitudinal moving motor; the transfer frame is equipped with a rack that meshes with the gear on the transverse moving motor.

5. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 4, characterized in that: It also includes a transfer and gripping mechanism mounted on a longitudinal moving frame; the transfer and gripping mechanism includes a rotary cylinder mounted on the longitudinal moving frame, a rotary frame connected to the rotary cylinder, and two grippers vertically mounted on the rotary frame. The gripper includes a gripping cylinder, an internal expansion jaw mounted on the gripping cylinder for gripping the inner hole of the workpiece, or an external jaw for gripping the outer end of the workpiece.

6. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 5, characterized in that: It also includes a positioning frame set on the longitudinal moving frame of the second robot, a positioner mounted on the positioning frame, and an adjusting rod connected to the positioner and driven by the positioner to push the workpiece and adjust the position of the workpiece mounted on the fixture.

7. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 1, characterized in that: It also includes a workpiece adjustment mechanism disposed between the first-process machine tool and the second-process machine tool for adjusting the angle and position of the workpiece; The workpiece adjustment mechanism includes an adjustment frame, a detection table mounted on the adjustment frame, a workpiece positioning component set on the detection table, a workpiece positioning groove on the workpiece positioning component corresponding to the workpiece, a flipping cylinder mounted on the adjustment frame for driving the workpiece to flip, a flipping frame connected to the flipping cylinder, a clamping cylinder connected to the flipping frame for clamping the workpiece, and a sensor set on the detection table for sensing the workpiece.

8. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 1, characterized in that: It also includes a finished product conveyor for storing and outputting finished workpieces. The finished product conveyor includes a finished product conveyor frame, a motor mounted on the finished product conveyor frame, a drive roller connected to the finished product conveyor frame and driven by the motor, a driven roller connected to the finished product conveyor frame, and a conveyor belt connected to the drive roller and the driven roller. The finished product conveyor frame is also equipped with a sensor for sensing whether there is a finished workpiece at the end of the conveyor belt.

9. The CNC lathe device for fully automatic machining of engine rocker arms according to claim 1, characterized in that: It also includes an inner diameter detection machine that detects the inner diameter of the workpiece after the workpiece has been processed by the first machine tool and feeds the result back to the controller. The controller then controls the machine tool system to automatically correct the tool compensation based on the detection result. Additionally, it includes a non-conforming product collection box for collecting non-conforming products.

10. A method for fully automated machining of engine rocker arms according to any one of claims 1-9, characterized in that: The specific steps are as follows: a. First, the operator positions several workpieces to be processed in the material slot of the material holder; b. The automatic feeder is controlled by the controller to move the workpiece to the loading position; c. After the sensor detects the workpiece, it sends a signal to the controller. The controller then controls the robot arm to move to the loading position and grab the workpiece at the loading position. d. After moving the workpiece into the machine tool of the first process, the workpiece is clamped by a fixture; e. The controller starts the machine tool for the first process to machine the inner hole and one end face of the workpiece; f. After the inner hole and end face are machined, control the driver to push the drive rod. The drive rod drives the drill jig to extend into the inner hole of the workpiece, which plays a guiding, supporting and positioning role for the drill bit to drill an inclined hole in the inner hole. g. Then control the drilling process on the workpiece; h. After the first process is completed, the controller controls the robot arm to remove the workpiece and place it into the workpiece positioning slot of the workpiece positioning component; i. Then control the tilting cylinder to drive the tilting frame and clamping cylinder to rotate 90°. After clamping the workpiece with the clamping cylinder, control the tilting cylinder to drive the workpiece to rotate 90°. j. Then, control the second robotic arm to remove the workpiece from the clamping cylinder and place it on the inner diameter measuring machine. The inner diameter measuring machine will then measure the inner diameter of the workpiece and send the measurement data to the controller. k. The controller automatically adjusts the tool compensation based on the detection results; l. And determine whether the size exceeds the set value according to the test results. If it exceeds the set value, the workpiece is clamped by the robot and placed in the non-conforming product collection box. If the test is qualified, the workpiece is clamped and moved to the second process machine tool. m. After the robot arm places the workpiece onto the second process fixture, it slightly clamps the workpiece with the internal expansion chuck; then it starts the positioner, and the positioner pushes the adjusting rod downward. During the downward movement, the adjusting rod contacts one side of the workpiece and pushes the workpiece to rotate until one end of the workpiece contacts the limiting support, thus completing the positioning of the workpiece. Then it controls the internal expansion chuck to clamp the workpiece. n. Then control the second-stage machine tool to process the workpiece; o. After processing is completed, the second robotic arm is controlled to remove the processed workpiece and place it on the finished product conveyor for output; p. When the sensor installed on the finished product conveyor frame detects the workpiece, it sends a signal to the controller. The controller then controls the finished product conveyor to stop and sends a signal to the operator to remove the finished workpiece from the finished product conveyor.

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