A turret machine zero positioning base plate control device, system, and method

Abstract

The application provides a rotary table type machine tool zero point positioning base plate control device, the control device comprises: a rotary table type machine tool workbench for mounting a zero point positioning system base plate; a mobile gas path propulsion device installed on a rotary table type machine tool linear shaft guide rail protection plate, during machine tool work, the mobile gas path propulsion device only follows the linear motion of the machine tool guide rail; a fixed gas path receiving and distributing device installed on the rotary table type machine tool workbench and capable of rotating with the rotary table type machine tool workbench, the fixed gas path receiving and distributing device is used for gas path butt joint transfer and distribution; meanwhile, the application also provides a rotary table type machine tool zero point positioning base plate control system and method.

Description

Technical Field

[0001] This application belongs to the field of mechanical manufacturing technology, specifically relating to a control device, system and method for zero-point positioning base plate of a rotary table machine tool. Background Technology

[0002] With the continuous development and application of digitalization and intelligence, the production methods of machinery manufacturing are constantly changing. Intelligent flexible production lines, as an advanced manufacturing technology, are based on CNC machine tools and equipped with automatic feeding systems, automated control systems, automated positioning and clamping systems, automated monitoring systems, etc., to realize intelligent control, monitoring, and operation scheduling of the entire production line. They have been widely used in aerospace and other fields.

[0003] The core function of an intelligent flexible production line's automatic feeding system is to automatically transport loaded standard pallets to the machine tool. Accurate positioning and clamping of the pallet to the machine tool's worktable during transport are prerequisites for automated processing. Currently, the zero-point positioning system is the main method for achieving rapid positioning and clamping of pallets on the machine tool's worktable. The zero-point positioning system consists of a base plate containing zero-point positioning chucks and a pallet containing pull studs. Its working principle involves introducing compressed air at a certain pressure into the chucks nested inside the base plate to achieve the opening and closing of the clamping system. The zero-point system requires four air circuits, designated P2, P3, P4, and P6. P2 controls the chuck opening; P3 is a cleaning air circuit that monitors the zero-point system's clamping status based on its closed-loop feedback pressure value; P4 provides a re-clamping function; and P6 monitors the chuck's open status. After the air circuit control system sends a chuck opening command, it monitors the gas flow feedback value of that circuit in real time to monitor the chuck's open status.

[0004] Deploying the zero-point positioning system base plate on the machine tool worktable and equipping it with the necessary multi-channel pneumatic connection devices to achieve zero-point opening and clamping has become a key technology for automatic pallet exchange on the production line. The implementation methods vary greatly depending on the machine tool structure and working method. Unlike vertical gantry five-axis machine tools, where the worktable only moves in the X and Y directions and the C-axis rotation is achieved by the spindle rotation, rotary table machine tools achieve C-axis movement through the rotation of the worktable. That is, during the processing, the worktable has both linear and rotary axis movements. This increases the difficulty of arranging the zero-point positioning system device and automatic pneumatic connection mechanism on the rotary table machine tool. How to arrange the zero-point positioning connection device on the rotary table machine tool without interfering with the rotation of the worktable has become a challenge for the rapid pallet change and automatic loading and unloading of rotary table machine tools. Summary of the Invention

[0005] Purpose of the invention: To address the problems mentioned in the background art, this invention proposes an automatic release and clamping control device, system, and method for a zero-point positioning base plate on a rotary table machine tool. It adds an air circuit connection device and integrates the air circuit control system with the machine tool. Through the implementation of this system, the problem of arranging a zero-point positioning system base plate on a rotary table machine tool can be solved. Simultaneously, the release and clamping of the zero-point base plate can be automatically controlled by PLC commands from the CNC system, realizing automatic loading and unloading of processing pallets.

[0006] In a first aspect, this application provides a zero-point positioning base plate control device for a rotary table machine tool, the control device comprising:

[0007] A rotary table for machine tools, used to mount the base plate of the zero-point positioning system;

[0008] A mobile air-path propulsion device is installed on the protective plate of the linear axis guide rail of a rotary table machine tool. When the machine tool is working, the mobile air-path propulsion device only follows the machine tool guide rail in a linear motion.

[0009] A fixed air path receiving and distributing device is installed on the rotary table of the machine tool and can rotate together with the rotary table. The fixed air path receiving and distributing device is used for air path docking, transfer and distribution.

[0010] Preferably, a safe distance is reserved between the mobile air propulsion device and the rotary machine tool worktable.

[0011] Preferably, the control device further includes:

[0012] Protective cover for mobile air-path propulsion device, used to protect against aluminum shavings and coolant;

[0013] A protective cover for the fixed gas line receiving and distributing device is used to protect against aluminum shavings and coolant.

[0014] Secondly, this application also provides a control method for a zero-point positioning base plate of a rotary table machine tool, the control method comprising:

[0015] The machine tool CNC system issues a machine tool pallet exchange command;

[0016] When the pneumatic control system receives the machine tool pallet exchange command, it determines that the machine tool exchange worktable is in the fixed position for exchange docking. Then, it sends a cylinder advance signal through the solenoid valve. The cylinder piston pushes the movable valve block to move. At the same time, the pneumatic control system opens the cleaning air source of the docking device through the solenoid valve to clean the positioning pin hole and air path docking interface of the docking device. After the cylinder is pushed into place, the proximity switch provides feedback that the cylinder is in place.

[0017] After receiving the cylinder positioning signal, the pneumatic control system opens six docking air lines via a solenoid valve. Air line P2 controls the chuck on the base plate to open, while air line P3 cleans the chuck. Simultaneously, a flow meter connected to air line P6 monitors the flow rate. When the flow rate reaches the set value, it determines that the base plate chuck has loosened and sends a signal back to the machine tool's CNC system. The machine tool then begins pallet fork replacement. Once pallet replacement is complete, the pneumatic control system monitors the pressure value of air line P3 via a pressure sensor. When the pressure value reaches the set value, it determines that the base plate chuck has clamped, and sends a signal back to the machine tool's CNC system.

[0018] Preferably, the control method further includes:

[0019] The control solenoid valve supplies compressed air to the P4 air circuit, controlling the tray to clamp again. After the tray is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve. The cylinder piston begins to retract. After the cylinder retracts to the correct position, the retraction proximity switch provides feedback that the cylinder has retracted to the correct position. At the same time, the pneumatic control system receives the signal and feeds it back to the machine tool CNC system, notifying the CNC machine tool that it can start subsequent processing.

[0020] Thirdly, this application also provides a zero-point positioning base plate control system for a rotary table machine tool, the control system comprising:

[0021] The machine tool CNC system is used to issue machine tool pallet exchange commands;

[0022] A pneumatic control system is connected to the CNC system of the machine tool. The pneumatic control system is used to receive and execute the pallet exchange command issued by the machine tool, convert the external air source into multiple air paths with specific pressure and flow, and transmit them to the air path fixing and propulsion device. At the same time, it monitors the operating status of each component of the air path docking device in real time and feeds it back to the CNC system of the machine tool, so as to realize the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange.

[0023] A motion control module is connected to the pneumatic control system, and the motion control module is used to clean the air passage and propulsion cylinder;

[0024] A status monitoring module is connected to the pneumatic control system and is used to monitor the operating status of each component of the air path docking device.

[0025] Preferably, the control system further includes:

[0026] An external air source is connected to the pneumatic control system, and the external air source is used to provide a stable air supply.

[0027] Preferably, the status monitoring module includes:

[0028] A flow meter is connected to the pneumatic control system and is used to monitor the airflow rate in the air path.

[0029] A pressure sensor is connected to the pneumatic control system and is used to monitor the pressure in the air path.

[0030] The beneficial technical effects of this application are as follows:

[0031] This application provides an automatic clamping and releasing control system for a rotary table machine tool's zero-point positioning base plate. The system includes an air path docking device, which consists of a movable air path propulsion device and a fixed air path receiving and distributing device. A fixed air path receiving block, matching the zero-point positioning base plate, is installed on the rotary table machine tool's worktable. This block receives six streams of compressed air from the movable propulsion device and then converts the compressed air into four streams, which are then docked with the four air inlets pre-installed on the zero-point positioning base plate. This enables the clamping, releasing, and status monitoring of the base plate. The fixed air path receiving and distributing device rotates together with the worktable during machine tool processing. A movable air path propulsion device is installed on the linear axis guide rail protective plate of the rotary table machine tool. This movable air path propulsion device receives multiple specific pressure streams generated by an external air source through a pneumatic control system. The airflow path and the moving airflow propulsion device are equipped with propulsion cylinders. When pallets are exchanged, the 6-way airflow quick-connect connector A is first cleaned by blowing air. At the same time, the cylinder extends and retracts to connect with the fixed airflow receiving and distributing device, supplying 6 channels of compressed air. After the pallet exchange is completed, the moving airflow propulsion device separates from the turntable and returns to a safe position to ensure that it does not interfere with the turntable during processing. The pneumatic control system is integrated with the machine tool's CNC system. It receives PLC commands from the machine tool, converts the external air source into multiple airflow paths with specific pressures and flow rates, and transmits them to the fixed airflow propulsion device. At the same time, it monitors the operating status of each component of the airflow docking device in real time and feeds it back to the CNC system, realizing the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, ensuring safety and reliability during the docking process. Attached Figure Description

[0032] Figure 1 This is an overall structural diagram of the automatic release and clamping device for the zero-point positioning base plate of a rotary table machine tool;

[0033] Figure 2 This is a side view of the mobile air-propelled device;

[0034] Figure 3 This is a front view of the mobile air-propelled device;

[0035] Figure 4 This is a schematic diagram of a fixed gas path receiving and distributing device;

[0036] Figure 5 This is a schematic diagram of the automatic release and clamping device for the zero-point positioning base plate of a rotary table machine tool.

[0037] Figure 6This is a schematic diagram of the automatic release and clamping control system for the zero-point positioning base plate of a rotary table machine tool.

[0038] The components include: 1. Mobile air path propulsion device; 2. Fixed air path receiving and distributing device; 3. Rotary table machine tool worktable; 4. Zero-point positioning system base plate; 5. Rotary table machine tool linear axis guide rail protective plate; 6. Mobile air path propulsion device protective cover; 7. Cable protection corrugated pipe; 8. Fixed air path receiving and distributing device protective cover; 1.1 Cable and air pipe protection corrugated pipe interface; 1.2 Air path and cable installation components; 1.3 Air path distribution quick-connect pipeline; 1.4 Propulsion device mounting base plate; 1.5 Guide rail mounting support; 1.6 Cylinder mounting seat; 1.7 Mobile air path propulsion device protective cover mounting fixing rod; 1.8 Connecting air path pipeline; 1.9 Cylinder control air path input point; 1.10 Cylinder tail end mounting bracket; 1.11 Cylinder; 1.12 Cylinder front end mounting bracket; 1.13 Air distribution block; 1.14 Air distribution block air source input quick-connect connector; 1.15 Valve block mounting. 1.16 Guide rail, 1.17 Cylinder movement following device, 1.18 Cylinder advance position proximity switch, 1.19 Cylinder retraction position proximity switch, 1.20 Movable valve block, 1.21 Round pin hole, 1.22 Cleaning nozzle, 1.23 Air circuit docking quick connector A, 1.24 Diamond pin hole, 2.1 Base plate air circuit docking block, 2.2 Air circuit merging quick connector, 2.3 Fixed air circuit receiving block, 2.4 Limit stop block, 2.5 Positioning round pin, 2.6 Air circuit docking quick connector B, 2.7 Air circuit docking quick connector C, 2.8 Air circuit docking quick connector D, 2.9 Air circuit docking quick connector E, 2.10 Air circuit docking quick connector F, 2.11 Air circuit docking quick connector G, 2.12 Diamond pin, 2.13 Fixed air circuit receiving block output air circuit docking connector, 2.14 Base plate air circuit docking block air circuit docking connector. Detailed Implementation

[0039] In this embodiment, an automatic release and clamping control device for the zero-point positioning base plate of a rotary table machine tool is provided. A moving air path propulsion device and a fixed air path receiving and distributing device are added to the rotary table machine tool. The automatic docking of the air path docking device is controlled by the air path control system to provide four channels of compressed air required for the release and clamping of the zero-point positioning system base plate. The pneumatic control system is integrated with the machine tool CNC system to realize the automatic release or clamping of the zero-point positioning system base plate by sending commands from the machine tool, and to monitor the status of each component inside the system to ensure safe and reliable operation.

[0040] The mobile pneumatic propulsion device is installed on the protective plate of the linear axis guide rail of the rotary table machine tool. When the machine tool is working, it only follows the machine tool guide rail in a linear motion and does not rotate with the worktable. It receives multiple pneumatic pipelines and control cables provided by the pneumatic control system through the cable and air pipe protection bellows interface. The pneumatic and electrical pipelines are rearranged neatly in the pneumatic and cable installation assembly. Then, through the pneumatic distribution quick-connect pipeline interface, it is connected to the pneumatic interface of each module in the propulsion device (including the cylinder control pneumatic input point, docking pneumatic pipeline and the quick-connect connector of the air source input of the air distribution block). At the same time, the control cable communicates with the control elements such as the sensors of each module through the signal line.

[0041] The mobile air path propulsion device is equipped with one air source for the extension and retraction of the cylinder. When the pneumatic control system receives the signal for air path docking, it controls the cylinder piston to extend forward, pushing the air distribution block and the movable valve block to move forward along the guide rail. The movable valve block is positioned and docked with the positioning pin of the fixed air path receiving and distributing device through the round pin hole, so as to realize the connection and supply of air path.

[0042] The fixed air path receiving and distributing device is installed on the rotary table of the machine tool. It rotates with the table during operation and its main function is air path docking, transfer, and distribution. It receives multiple air sources from the moving air path propulsion device via a quick-connect air path connector. After passing through the internal structure, it outputs six independent air sources through the fixed air path receiving block's output air path connector. One air source connects to the P2 air path interface of the base plate air path connector to control the chuck's opening. Another air source connects to the base plate air path connector... The P6 air circuit interface of the connector is used for chuck opening status monitoring; the three air sources are combined into one main air source, which is connected to the P3 air circuit interface of the base plate air circuit docking block air circuit docking connector to clean aluminum shavings and other debris from the chuck contact positioning surface when the base plate is released. At the same time, after the tray and the base plate are docked, the closed feedback air pressure value of this line is used to determine whether the zero-point base plate is clamped; one air source is connected to the P4 air circuit interface of the base plate air circuit docking block air circuit docking connector to control the opening and closing of the zero-point positioning system's re-clamping function.

[0043] The mobile air path propulsion device is equipped with a docking device and a clean air source. After being led out through the air path distribution quick-connect pipeline, it is connected to the air source input quick-connect connector on the air distribution block. Then, compressed air is output from the cleaning nozzle to clean the aluminum shavings and other debris attached to the round pin hole, diamond pin hole, air path docking quick-connect connector, positioning round pin and diamond pin at fixed points, so as to ensure the smoothness and reliability of the air path docking process.

[0044] The pneumatic control system, integrated with the machine tool's CNC system, receives and executes PLC commands from the machine tool, converts external air sources into multiple air paths with specific pressures and flow rates, and transmits them to the air path propulsion device. At the same time, it monitors the operating status of each component of the air path docking device in real time and feeds it back to the machine tool's CNC system, enabling the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, ensuring safety and reliability during the docking process.

[0045] In other embodiments of this application, an automatic release and clamping control system for the zero-point positioning base plate of a rotary table machine tool is provided. An air path docking device is added to the rotary table machine tool: a moving air path propulsion device and a fixed air path receiving and distributing device. The air path control system enables automatic docking of the air path docking device, providing four air paths required for the release and clamping of the zero-point positioning system base plate. The air path control system is integrated with the machine tool's CNC system, enabling automatic release or clamping of the zero-point positioning system base plate via commands sent from the machine tool. Simultaneously, the air path control system can monitor the status of each component inside the air path docking device, ensuring safe and reliable operation.

[0046] The movable air path propulsion device is installed on the protective plate 5 of the linear axis guide rail of the rotary table machine tool. When the machine tool is working, it only follows the machine tool guide rail to make linear motion and does not rotate with the worktable. During the installation process, the installation distance between the air path propulsion device and the machine tool worktable is taken into account, and a sufficient safety distance is reserved to ensure that the retraction position of the movable air path propulsion device does not interfere with the rotary table machine tool worktable when the machine tool worktable rotates.

[0047] The mobile air path docking device support base is the propulsion device mounting base plate installed on the linear axis guide rail protective plate of the rotary table machine tool. The air path and cable installation assembly is installed on the propulsion device mounting base plate through threaded connection. The cable and air pipe protection corrugated pipe interface is installed on the air path and cable installation assembly through the corrugated pipe quick connector. It is used to receive multiple air path pipelines and control cables provided by the pneumatic control system. The received air path and circuit pipelines are rearranged neatly in the air path and cable installation assembly. Then, through the air path distribution quick connector, it is connected to the air path docking interface of each module in the propulsion device (including the cylinder control air path input point, docking air path pipeline and air source input quick connector of the air distribution block) through the air pipe. At the same time, the control cable communicates with the control elements such as the sensors of each module through the signal line.

[0048] The mobile air path docking device is equipped with one air source for the extension and retraction of the cylinder. The cylinder mounting base and the propulsion guide rail are connected and fixed to the propulsion device mounting base plate through the guide rail mounting support. The cylinder tail end mounting bracket is installed on the cylinder mounting base through a threaded connection. The propulsion cylinder is fixedly connected to the cylinder tail end mounting bracket. The cylinder piston push rod is fixedly connected to the cylinder front end mounting bracket through bolts and nuts. The bottom of the air distribution block is fixedly connected to the movable valve block, and the upper end is connected and fixed to the front end mounting bracket through a countersunk thread. The movable valve block is installed on the valve block mounting base. When the cylinder moves forward or backward, it drives the front end mounting bracket, the air distribution block and the movable valve block to move back and forth together. The movable valve block drives the valve block mounting base to slide back and forth on the guide rail, realizing the propulsion and retraction of the mobile air path.

[0049] When the pneumatic control system receives a signal for air path docking, it sends a signal through the control air path input point to control the cylinder piston to extend forward, pushing the air distribution block and the movable valve block forward along the guide rail. The movable valve block docks with the positioning pins of the fixed air path receiving and distributing device through the round pin hole and the diamond pin hole. Then, the six air path docking quick connectors A of the propulsion device and the six air path docking quick connectors BG of the receiving and distributing device open the internal one-way valve by squeezing, realizing the connection and supply of air path.

[0050] The fixed air path receiving and distributing device is installed on the rotary table of the machine tool. It rotates with the table during machine operation. Its main function is air path docking, transfer, and distribution. It receives six individual air sources from the moving air path propulsion device via the air path docking quick-connect connector (BG). After passing through the internal structure, it outputs six independent air sources through the fixed air path receiving block's air path docking connector. The air paths are connected by air path hoses. One air source connects to the P2 air path interface of the base plate air path docking block's air path docking connector to provide compressed air at a specific pressure to control the chuck's opening. Another air source connects to the P6 air path interface of the base plate air path docking block's air path docking connector for chuck opening status monitoring. A flow meter detects the gas flow in this air path to determine whether the chuck on the base plate can be opened. The flow meter signal is transmitted through pneumatic... The control system transmits data to the CNC system to determine whether the base plate is loose and whether the conditions for pallet exchange are met. Three air supply lines are merged into one main air supply line, which connects to the P3 air supply interface of the base plate air supply docking block. This provides compressed air to clean aluminum shavings and other debris from the chuck contact positioning surface when the base plate is loosened. Simultaneously, after the pallet and base plate are docked, the closed-loop feedback air pressure value of this line determines whether the zero-point base plate is clamped. The pressure sensor signal is transmitted to the CNC system via the pneumatic control system to determine whether the base plate is clamped and ready for subsequent processing. One air supply line connects to the P4 air supply interface of the base plate air supply docking block to provide compressed air at a specific pressure, controlling the opening and closing of the zero-point positioning system's re-clamping function.

[0051] After the pallet is replaced, when the pneumatic control system receives the signal that the air circuit docking is complete, it sends a signal to control the cylinder to retract, pushing the air distribution block and the movable valve block to move backward along the guide rail. The movable valve block separates from the fixed air circuit receiving and distributing device and retracts to a safe position, completing the automatic control function of opening and clamping the zero-point positioning base plate. A cylinder movement following device is installed on the side of the valve block mounting seat. Cylinder retraction proximity switches and cylinder advance proximity switches are installed at the cylinder retraction and advance positions. The following device triggers the proximity switches during the cylinder movement, and the trigger signal is fed back to the machine tool through the pneumatic control system. The machine tool determines whether the cylinder has been advanced to the correct position during air circuit docking, whether it has returned to a safe position after air circuit docking is completed, and whether subsequent processing can begin.

[0052] The mobile air path propulsion device is equipped with a docking device and a clean air source. After being led out through the air path distribution quick-connect pipeline, it is connected to the air source input quick-connect connector on the air distribution block. After passing through the internal structure of the air distribution block, compressed air is output through the cleaning nozzle to clean the round pin hole, diamond pin hole, air path docking quick-connect connector A, positioning round pin and diamond pin, which may be attached to the machine tool processing of aluminum chips and other debris, ensuring the smoothness and reliability of the air path docking process.

[0053] Preferably, to ensure the reliability of the docking device and prevent contamination from aluminum chips and coolant during machine tool processing, protective covers are added to the moving air path propulsion device and the fixed air path receiving and distributing device, respectively. The protective cover of the moving air path propulsion device is installed on the mounting rod of the moving air path propulsion device with bolts, and the protective cover of the fixed air path receiving and distributing device is installed and fixed by bolts on the side of the fixed air path receiving block. At the same time, the external air path and signal line introduced by the docking device are concentrated and pulled to the top of the machine tool through the cable protection corrugated pipe, and then connected to the external air path and the machine tool control system.

[0054] The pneumatic control system is integrated with the machine tool's CNC system. It receives PLC commands from the machine tool and executes them, converting external air sources into multiple air paths with specific pressures and flow rates. These paths are then transmitted to the air path fixing and propulsion device. Simultaneously, the system monitors the operating status of each component of the air path docking device in real time and feeds it back to the CNC system. This enables the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, ensuring safety and reliability during the process.

[0055] In other embodiments of this application, see the appendix. Figures 1-6 This paper presents an automatic release and clamping control system for a zero-point positioning base plate of a rotary table machine tool. Taking a typical rotary table machine tool structure as an example, the zero-point positioning system base plate 4 is installed in the center of the rotary table machine tool's worktable 3. An air path docking device is added to the rotary table machine tool: a moving air path propulsion device 1 and a fixed air path receiving and distributing device 2. The air path control system controls the docking of the air path docking device, providing four air paths required for the release and clamping of the zero-point positioning system base plate. By integrating the pneumatic control system with the machine tool's CNC system, the system can automatically release or clamp the zero-point positioning system base plate by sending commands from the machine tool, and monitor the status of each component within the system to ensure safe and reliable operation.

[0056] The mobile pneumatic propulsion device 1 is mounted on the linear axis guide rail guard plate 5 of the rotary table machine tool via bolts through a docking device. When the machine tool is working, it only follows the machine tool guide rail in a linear motion and does not rotate with the worktable. During the installation process, the installation distance between the pneumatic propulsion device and the machine tool worktable during rotation is taken into account, and a sufficient safety distance is reserved to ensure that the mobile pneumatic propulsion device 1 does not interfere with the rotary table machine tool worktable 3 when the machine tool is rotating.

[0057] The supporting base of the mobile air circuit docking device 1 is the propulsion device mounting base plate 1.4, which is installed on the linear axis guide rail protection plate 5 of the rotary table machine tool. The air circuit and cable mounting assembly 1.2 is installed on the propulsion device mounting base plate 1.4 by threaded connection. The cable and air pipe protection corrugated pipe interface 1.1 is installed on the air circuit and cable mounting assembly 1.2 by corrugated pipe quick connector. It is used to receive multiple air circuit pipelines and control cables provided by the pneumatic control system. The received air circuit and circuit pipelines are rearranged neatly in the air circuit and cable mounting assembly 1.2. Then, through the air circuit distribution quick connector 1.3, it is connected to the cylinder control air circuit input point 1.9, docking air circuit pipeline 1.8 and air source input quick connector 1.14 in the propulsion device through the air pipe. At the same time, the control cable communicates with the sensor control elements of each module through the signal line.

[0058] The mobile air circuit docking device is equipped with one air source for the extension and retraction of the cylinder. The cylinder mounting base 1.6 and the propulsion guide rail 1.16 are connected and fixed to the propulsion device mounting base plate 1.4 via the guide rail mounting support 1.5. The cylinder tail end mounting bracket 1.10 is threadedly installed on the cylinder mounting base 1.6. The propulsion cylinder 1.11 is fixedly connected to the cylinder tail end mounting bracket 1.10. The cylinder piston push rod is fixedly connected to the cylinder front end mounting bracket 1.12 via bolts and nuts. (Air distribution...) The bottom of block 1.13 is fixedly connected to the movable valve block 1.20, and the upper end is fixedly connected to the front mounting bracket 1.12 through a countersunk thread. The movable valve block 1.20 is mounted on the valve block mounting seat 1.15. When the cylinder moves forward or backward, it drives the front mounting bracket 1.12, the air distribution block 1.13 and the movable valve block 1.20 to move back and forth together. The movable valve block 1.20 drives the valve block mounting seat 1.15 to slide back and forth on the guide rail 1.16, realizing the forward and backward movement of the moving air passage.

[0059] When the pneumatic control system receives the signal for air path docking, it sends a signal through the air path input point 1.9 controlled by the cylinder to control the piston of the propulsion cylinder 1.11 to extend forward, pushing the air distribution block 1.13 and the movable valve block 1.20 to move forward along the guide rail. The movable valve block achieves positioning docking with the positioning pins 2.5 and 2.12 of the fixed air path receiving and distributing device 2 through the round pin hole 1.21 and the diamond pin hole 1.24. Then, the six air path docking quick connectors A1.23 of the propulsion device and the six air path docking quick connectors BG of the receiving and distributing device open the internal one-way valve by squeezing, realizing the connection and supply of air paths. The limit block 2.4 plays a limiting protection role for the propulsion device during the docking process.

[0060] The fixed air path receiving and distributing device 2 is mounted on the rotary table of the machine tool using countersunk bolts. It rotates with the table during machine operation. Its main function is air path docking, transfer, and distribution. It receives six individual air sources from the mobile air path propulsion device 1 via six quick-connect air path connectors (BG). Through the internal structure, it outputs six independent air sources via the fixed air path receiving block output air path docking connector 2.13. The air paths are connected via flexible air hoses. One air source connects to the P2 air path interface of the base plate air path docking block air path docking connector 2.14 to provide compressed air at a specific pressure to control the chuck opening. Another air source connects to the P6 air path interface of the base plate air path docking block air path docking connector 2.14 for chuck opening status monitoring. A flow meter detects the gas flow rate in this air path to determine whether the chuck on the base plate can be opened. The flow meter signal is transmitted through… The pneumatic control system transmits data to the CNC system to determine whether the base plate is loose and ready for pallet exchange. Three air sources are combined into one main air source via quick-connect fitting 2.2. This main air source connects to the P3 air interface of the base plate air path docking block 2.14, providing compressed air to clean aluminum chips and debris from the chuck contact surface when the base plate is loose. Simultaneously, after the pallet and base plate are docked, the closed-loop feedback air pressure value of this main air source determines whether the zero-point base plate is clamped. The pressure sensor signal is transmitted to the CNC system via the pneumatic control system to determine whether the base plate is clamped and ready for subsequent processing. One air source connects to the P4 air interface of the base plate air path docking block 2.14 to provide compressed air at a specific pressure, controlling the opening and closing of the zero-point positioning system's re-clamping function.

[0061] After the pallet is replaced, when the pneumatic control system receives the signal that the air circuit docking is complete, it sends a signal through the control air circuit input point 1.9 to control the piston of cylinder 1.11 to move backward, pushing the air distribution block 1.13 and the movable valve block 1.20 to move backward along the guide rail. The movable valve block separates from the fixed air circuit receiving and distributing device and returns to a safe position, completing the automatic opening and clamping control function of the zero-point positioning base plate. A cylinder movement following device 1.17 is installed on the side of the valve block mounting seat 1.15. A cylinder return position proximity switch 1.19 and a cylinder advance position proximity switch 1.18 are installed at the cylinder movement return and return positions. The proximity switches are installed on the advance device mounting base plate 1.4. During the cylinder movement, the following device 1.17 triggers the proximity switches, and the trigger signal is fed back to the machine tool through the pneumatic control system. The machine tool determines whether the cylinder has been advanced to the correct position during air circuit docking and whether it has returned to a safe position after air circuit docking is completed, and whether subsequent processing can begin.

[0062] The mobile air propulsion device is equipped with a docking device and a clean air source. The clean air source is led out through the air distribution quick-connect line 1.3 and connected to the air source input quick-connect connector 1.14 on the air distribution block 1.13. After passing through the internal structure of the air distribution block, compressed air is output through the cleaning nozzle 1.22 to clean the aluminum chips and debris generated during the machine tool processing on the round pin hole 1.21, the diamond pin hole 1.24, the air path docking quick-connect connector A1.23, the positioning round pin 2.5, and the diamond pin 2.12 at fixed points, ensuring the smoothness and reliability of the air path docking process.

[0063] During machine tool processing, a large amount of aluminum chips and coolant are generated. To ensure the reliability of the docking device, protective covers 6 and 8 are added to the moving air path propulsion device 1 and the fixed air path receiving and distributing device 2, respectively, to enhance the docking device's protection against aluminum chips and coolant. The protective cover 6 of the moving air path propulsion device is bolted to the mounting rod 1.7 of the moving air path docking device protective cover, and the mounting rod 1.7 is bolted to the cylinder mounting seat 1.6. The protective cover 8 of the fixed air path receiving and distributing device is installed and fixed by bolts on the side of the fixed air path receiving block 2.3. At the same time, the external air path and signal line of the docking device are concentrated and pulled to the top of the machine tool through the cable protection corrugated pipe 7, and then connected to the external air path and machine tool control system.

[0064] The pneumatic control system is integrated with the machine tool's CNC system. It receives and executes PLC commands issued by the machine tool, converts the external air source into multiple air paths with specific pressures and flow rates, and transmits them to the air path fixing and propulsion device. At the same time, it monitors the operating status of each component of the air path docking device in real time and feeds it back to the CNC system, so as to realize the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, ensuring safety and reliability in the docking process.

[0065] Specific control process: Upon receiving the machine tool pallet exchange command, the pneumatic control system determines that the machine tool exchange table is in the fixed exchange docking position. Then, it sends a cylinder advance signal via a solenoid valve. The cylinder piston pushes the movable valve block to move. Simultaneously, the pneumatic control system opens the cleaning air source for the docking device via a solenoid valve to clean the positioning pin holes and air path docking interfaces. After the cylinder is pushed into place, a proximity switch provides feedback that the cylinder is in position. Upon receiving this signal, the control system opens six docking air paths via a solenoid valve. The P2 air path controls the chuck on the base plate to open, and the P3 air path cleans the chuck. Simultaneously, an airflow meter connected to the P6 air path monitors the flow rate. When the flow rate reaches a set value, it determines that the base... The pallet chuck has been released, and a signal is fed back to the machine tool's CNC system. The machine tool begins pallet fork replacement. When the pallet replacement is complete, the pneumatic control system monitors the pressure value of the P3 air circuit through a pressure sensor. When the pressure value reaches the set value, it determines that the base chuck has been clamped and feeds a signal back to the machine tool's CNC system. At the same time, it controls the solenoid valve to provide compressed air to the P4 air circuit, controlling the pallet to clamp again. After the pallet is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve. The cylinder piston begins to retract. After the cylinder retracts to the correct position, a retraction proximity switch provides feedback that the cylinder has retracted to the correct position. The control system receives the signal and feeds it back to the machine tool's CNC system, notifying the CNC machine tool that it can begin subsequent processing.

Claims

1. A zero-point positioning base plate control device for a rotary table machine tool, characterized in that, The control device includes: A rotary table for machine tools, used to mount the zero-point positioning base plate; A mobile air-path propulsion device is installed on the protective plate of the linear axis guide rail of a rotary table machine tool. When the machine tool is working, the mobile air-path propulsion device only follows the machine tool guide rail in a linear motion. A fixed air path receiving and distributing device is installed on the rotary table of the machine tool and can rotate with it. This device is used for air path docking, transfer, and distribution. It receives six air sources from the moving air path propulsion device via the air path docking quick-connect connector BG. After passing through the internal structure, it outputs six independent air sources through the fixed air path receiving block's air path docking connector. One air source connects to the P2 air path interface of the base plate air path docking block's air path docking connector to control the chuck's opening; another air source connects to the base plate air path docking... The P6 air path interface of the block air path docking connector is used for chuck opening status monitoring; the three air sources are combined into one main air source, which is connected to the P3 air path interface of the base plate air path docking connector to clean the aluminum shavings on the chuck contact positioning surface when the zero-point positioning base plate is released. At the same time, after the tray and the zero-point positioning base plate are docked, the closed feedback air pressure value of this path is used to determine whether the zero-point positioning base plate is clamped; one air source is connected to the P4 air path interface of the base plate air path docking connector to control the opening and closing of the zero-point positioning system's re-clamping function. The supporting base of the mobile air circuit docking device is the propulsion device mounting base plate installed on the protective plate of the linear axis guide rail of the rotary table machine tool. The air circuit and cable installation assembly is installed on the propulsion device mounting base plate by threaded connection. The cable and air pipe protective corrugated pipe interface is installed on the air circuit and cable installation assembly by corrugated pipe quick connector. It is used to receive multiple air circuit lines and control cables provided by the pneumatic control system. The received air circuit and circuit lines are rearranged neatly in the air circuit and cable installation assembly. Then, the quick connector is distributed through the air circuit and connected to the cylinder control air circuit input point, docking air circuit line and air source input quick connector of the air distribution block in the propulsion device through the air pipe. At the same time, the control cable communicates with the sensor control elements of each module through the signal line. The mobile air circuit docking device is equipped with one air source for the extension and retraction of the cylinder. The cylinder mounting base and the propulsion guide rail are connected and fixed to the propulsion device mounting base plate through the guide rail mounting support. The cylinder tail end mounting bracket is installed on the cylinder mounting base through a threaded connection. The propulsion cylinder is fixedly connected to the cylinder tail end mounting bracket. The cylinder piston push rod is fixedly connected to the cylinder front end mounting bracket through bolts and nuts. The bottom of the air distribution block is fixedly connected to the movable valve block, and the upper end is connected and fixed to the front end mounting bracket through a countersunk thread. The movable valve block is installed on the valve block mounting base. When the cylinder moves forward or backward, it drives the front end mounting bracket, the air distribution block and the movable valve block to move back and forth together. The movable valve block drives the valve block mounting base to slide back and forth on the guide rail, realizing the propulsion and retraction of the mobile air circuit. The mobile air propulsion device is equipped with a docking device and a clean air source. After being led out through the air distribution quick-connect pipeline, it is connected to the air source input quick-connect connector on the air distribution block. After passing through the internal structure of the air distribution block, compressed air is output through the cleaning nozzle to clean the aluminum chips and debris generated during the machine tool processing on the round pin hole, diamond pin hole, air path docking quick-connect connector A, positioning round pin, and diamond pin at fixed points.

2. The control device according to claim 1, characterized in that, A safe distance is reserved between the mobile air-propelled device and the rotary machine tool worktable.

3. The control device according to claim 1, characterized in that, The control device further includes: Protective cover for mobile air-path propulsion device, used to protect against aluminum shavings and coolant; A protective cover for the fixed gas line receiving and distributing device is used to protect against aluminum shavings and coolant.

4. A method for controlling the zero-point positioning base plate of a rotary table machine tool, characterized in that, The control method is applied to the control device as described in claim 1, and the control method includes: The machine tool CNC system issues a machine tool pallet exchange command; When the pneumatic control system receives the machine tool pallet exchange command, it determines that the machine tool exchange worktable is in the fixed position for exchange docking. Then, it sends a cylinder advance signal through the solenoid valve. The cylinder piston pushes the movable valve block to move. At the same time, the pneumatic control system opens the cleaning air source of the docking device through the solenoid valve to clean the positioning pin hole and air path docking interface of the docking device. After the cylinder is pushed into place, the proximity switch provides feedback that the cylinder is in place. After receiving the cylinder positioning signal, the pneumatic control system opens the 6-way docking air path via the solenoid valve. The P2 air path controls the chuck on the zero-point positioning base plate to open, and the P3 air path cleans the chuck. At the same time, the flow rate of this path is monitored by the airflow meter connected to the P6 air path. When the flow rate reaches the set value, it is determined that the zero-point positioning base plate chuck has been released, and the signal is fed back to the machine tool CNC system. The machine tool begins pallet fork replacement. When the pallet replacement is completed, the pneumatic control system monitors the pressure value of this path through the pressure sensor connected to the P3 air path. When the pressure value reaches the set value, it is determined that the zero-point positioning base plate chuck has been clamped, and the signal is fed back to the machine tool CNC system.

5. The control method according to claim 4, characterized in that, The control method further includes: The control solenoid valve supplies compressed air to the P4 air circuit, controlling the tray to clamp again. After the tray is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve. The cylinder piston begins to retract. After the cylinder retracts to the correct position, the retraction proximity switch provides feedback that the cylinder has retracted to the correct position. The pneumatic control system receives the signal and simultaneously feeds it back to the machine tool CNC system, notifying the CNC machine tool to begin subsequent processing.

6. A zero-point positioning base plate control system for a rotary table machine tool, characterized in that, The control system is used to control the control device as described in claim 1, and the control system includes: The machine tool CNC system is used to issue machine tool pallet exchange commands; A pneumatic control system is connected to the CNC system of the machine tool. The pneumatic control system is used to receive and execute the pallet exchange command issued by the machine tool, convert the external air source into multiple air paths with specific pressure and flow, and transmit them to the air path fixing and propulsion device. At the same time, it monitors the operating status of each component of the air path docking device in real time and feeds it back to the CNC system of the machine tool, so as to realize the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange. A motion control module is connected to the pneumatic control system, and the motion control module is used to clean the air passage and propulsion cylinder; A status monitoring module is connected to the pneumatic control system and is used to monitor the operating status of each component of the air path docking device.

7. The control system according to claim 6, characterized in that, The control system further includes: An external air source is connected to the pneumatic control system, and the external air source is used to provide a stable air supply.

8. The control system according to claim 7, characterized in that, The status monitoring module includes: A flow meter is connected to the pneumatic control system and is used to monitor the airflow rate in the air path. A pressure sensor is connected to the pneumatic control system and is used to monitor the pressure in the air path.

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