Device, system and method for controlling zero-point positioning foundation plate of rotary table type machine tool

Abstract

The invention provides a control device for a zero-point positioning foundation plate of a rotary table type machine tool, and the control device comprises a rotary table type machine tool workbench which is used for installing a zero-point positioning system foundation plate; the movable gas path propelling device is mounted on a linear shaft guide rail protection plate of the rotary table type machine tool, and when the machine tool works, the movable gas path propelling device only moves linearly along with a guide rail of the machine tool; the fixed gas path receiving and distributing device is mounted on the rotary table type machine tool worktable, can rotate together with the rotary table type machine tool worktable, and is used for butt joint transfer and distribution of gas paths; meanwhile, the invention further provides a control system and method for the zero-point positioning foundation plate of the rotary table type machine tool.

Description

Technical Field

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

[0002] With the continuous development and application of digitalization and intelligence, the production mode of mechanical manufacturing is constantly changing. As an advanced manufacturing technology, the intelligent flexible production line is based on CNC machine tools and is equipped with automatic feeding systems, automated control systems, automated positioning and clamping, automated monitoring and other systems. It realizes intelligent control, monitoring and operation scheduling of the entire production line, and has been widely used in aerospace and other fields.

[0003] The core function of the automatic feeding system of the intelligent flexible production line is to automatically transport the loaded standard pallet to the machine tool. The accurate positioning and clamping of the pallet and the machine tool workbench during the transportation process is the premise of automated processing. At present, the zero-point positioning system is the main way to realize the rapid positioning and clamping of the pallet on the machine tool workbench. The zero-point positioning system consists of a base plate with a zero-point positioning chuck and a pallet with rivets. The working principle is to pass a certain pressure of compressed air into the chuck nested inside the base plate to realize the loosening and clamping of the clamping system. The zero-point system needs to be equipped with 4 gas circuits, which are respectively named P2, P3, P4 and P6. Among them, the P2 gas circuit is used to control the opening of the chuck, and the P3 gas circuit is a cleaning gas circuit. At the same time, according to its closed feedback air pressure value, it monitors whether the zero-point system is clamped, the P4 gas circuit is a re-clamping function, and the P6 gas circuit is a chuck opening status monitoring gas circuit. After the gas circuit control system sends the chuck opening command, it monitors the gas flow feedback value of the circuit in real time to monitor the chuck opening status.

[0004] How to deploy the zero-point positioning system base plate on the machine tool workbench and equip it with the required multi-channel air path docking device to achieve the opening and clamping of the zero point has become a key technology for automatic pallet exchange in the production line. The implementation methods vary greatly due to the different machine tool structures and working methods. Unlike the vertical gantry five-axis machine tool, the workbench only moves in the X and Y directions, and the C-axis rotation is achieved by the rotation of the spindle. The rotary machine tool achieves the movement of the C-axis through the rotation of the workbench, that is, during the processing, the workbench has both linear and rotary axis movements. This will increase the difficulty of arranging the zero-point positioning system device and the automatic air path docking mechanism on the rotary machine tool. How to arrange the zero-point positioning docking device on the rotary machine tool without interfering with the rotation of the workbench has become a difficulty for the rotary machine tool to quickly change pallets and achieve automatic loading and unloading. Summary of the invention

[0005] Purpose of the invention: Aims to solve the problems mentioned in the background technology, and proposes a control device, system and method for automatic loosening and clamping of the zero-point positioning base plate of a rotary machine tool, adds an air path docking device, and integrates the air path control system with the machine tool. Through the implementation of the system, it is possible to arrange the zero-point positioning system base plate on the rotary machine tool, and at the same time, the loosening and clamping of the zero-point base plate can be automatically controlled through the PLC instructions of the CNC system, so as to realize automatic loading and unloading of the processing pallet.

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

[0007] Rotary machine tool table, used to install the zero point positioning system base plate;

[0008] The mobile gas path propulsion device is installed on the linear axis guide rail protection plate of the rotary table type machine tool. When the machine tool is working, the mobile gas path propulsion device only follows the machine tool guide rail to make linear motion;

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

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

[0011] Preferably, the control device further comprises:

[0012] Mobile gas line propulsion unit protective cover to protect against aluminum chips and coolant;

[0013] Fixed gas line receiving and distributing device protective cover to prevent aluminum chips and coolant.

[0014] In a second aspect, the present application also provides a method for controlling a zero-point positioning base plate of a rotary table machine tool, the control method comprising:

[0015] The CNC system of the machine tool issues a command for changing the machine tool pallet;

[0016] The pneumatic control system receives the machine tool pallet exchange instruction, determines that the machine tool exchange worktable is in the exchange docking fixed position, and sends a cylinder push 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 docking device cleaning air source through the solenoid valve to clean the docking device positioning pin hole and the air path docking interface. After the cylinder is pushed into place, the proximity switch is used to feedback that the cylinder is in place.

[0017] After the pneumatic control system receives the cylinder in place signal, it opens the 6-way docking air circuit through the solenoid valve, controls the opening of the chuck on the base plate through the P2 air circuit, cleans the chuck through the P3 air circuit, and monitors the flow rate of this circuit through the air flow meter connected to the P6 air circuit. When the flow rate reaches the set value, it is judged that the chuck of the base plate has been loosened, and the signal is fed back to the machine tool CNC system. The machine tool starts to fork the pallet for replacement. When the pallet replacement is completed, the pneumatic control system monitors the pressure value of this circuit through the pressure sensor connected to the P3 air circuit. When the pressure value reaches the set value, it is judged that the chuck of the base plate has been clamped, and the signal is fed back to the machine tool CNC system.

[0018] Preferably, the control method further includes:

[0019] The control solenoid valve provides compressed air for the P4 air circuit to control the pallet to be clamped again. After the pallet is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve, and the cylinder piston begins to retract. After the cylinder retracts into place, the retraction proximity switch is used to feedback that the cylinder has retracted into place. 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] In a third aspect, the present application also provides a rotary table machine tool zero point positioning base plate control system, the control system comprising:

[0021] Machine tool CNC system, used to issue machine tool pallet exchange instructions;

[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 propulsion device. At the same time, the operating status of each component of the air path docking device is monitored in real time and fed 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 connected to the pneumatic control system, the motion control module being used to clean the air path and propel the cylinder;

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

[0025] Preferably, the control system further comprises:

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

[0027] Preferably, the status monitoring module comprises:

[0028] A flow meter connected to the pneumatic control system, the flow meter is used to monitor the air flow rate of the air path;

[0029] A pressure sensor is connected to the pneumatic control system, and the pressure sensor is used to monitor the pressure of the air circuit.

[0030] Beneficial technical effects of this application:

[0031] The present application provides an automatic loosening and clamping control system for a zero-point positioning base plate of a rotary table machine tool. The system includes an air circuit docking device, which is divided into a mobile air circuit propulsion device and a fixed air circuit receiving and distribution device. A fixed air circuit receiving block matching the zero-point positioning base plate is installed on the workbench of the rotary table machine tool to receive the 6-way compressed air transmitted by the mobile propulsion device, and then convert the compressed air into 4-way compressed air, which is docked with the 4 air inlets reserved for the zero-point positioning base plate to achieve clamping, loosening and status monitoring of the base plate. The fixed air circuit receiving and distribution device rotates together with the workbench during machine tool processing; a mobile air circuit propulsion device is installed on the linear axis guide rail protective plate of the rotary table machine tool, and the mobile air circuit propulsion device receives multi-way specific pressure formed by an external air source through a pneumatic control system. The mobile air path propulsion device is equipped with a propulsion cylinder. When the pallet is exchanged, the 6-way air path quick connector is first blown clean, and at the same time, the cylinder is extended and connected to the fixed air path receiving and distribution device to supply 6-way compressed air. After the pallet exchange is completed, the mobile air path propulsion device is separated from the turntable and returned to a safe position to ensure that there is no interference with the turntable during the processing; the pneumatic control system is integrated with the machine tool CNC system, receives the PLC instructions issued by the machine tool, converts the external air source into multiple air paths with specific pressure and flow, and transmits them to the air path fixed 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 back to the CNC system, so as to realize the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, and ensure safety and reliability during the docking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the overall structure diagram of the automatic release clamping device of the zero-point positioning base plate of the rotary table machine tool;

[0033] Figure 2 is a side view of the mobile gas path propulsion device;

[0034] Figure 3 is a front view of the mobile gas path propulsion device;

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

[0036] Figure 5 It is a schematic diagram of the protection of the automatic release clamping device of the zero-point positioning base plate of a rotary table machine tool;

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

[0038] Among them: 1 mobile gas path propulsion device, 2 fixed gas path receiving and distribution device, 3 rotary table machine tool workbench, 4 zero point positioning system base plate, 5 rotary table machine tool linear axis guide rail protection plate, 6 mobile gas path propulsion device protection cover, 7 cable protection bellows, 8 fixed gas path receiving and distribution device protection cover, 1.1 cable and air pipe protection bellows interface, 1.2 gas path and cable installation components, 1.3 gas path distribution quick plug pipeline, 1.4 propulsion device installation base plate, 1.5 guide rail installation support, 1.6 cylinder mounting seat, 1.7 mobile gas path propulsion device protection cover installation fixing rod, 1.8 docking gas path pipeline, 1.9 cylinder control gas path input point, 1.10 cylinder tail end mounting bracket, 1.11 cylinder, 1.12 cylinder front end mounting bracket, 1.13 gas block, 1.14 gas block gas source input quick plug connector, 1.15 valve Block mounting seat, 1.16 guide rail, 1.17 cylinder motion following device, 1.18 cylinder push in place proximity switch, 1.19 cylinder retract in place proximity switch, 1.20 movable valve block, 1.21 round pin hole, 1.22 cleaning nozzle, 1.23 gas path quick plug connector, 1.24 diamond pin hole, 2.1 base plate gas path docking block, 2.2 gas path merging quick plug connector, 2.3 fixed gas path receiving block, 2.4 limit stopper, 2.5 positioning round pin, 2.6 gas path docking quick plug connector, 2.7 gas path docking quick plug connector, 2.8 gas path docking quick plug connector, 2.9 gas path docking quick plug connector, 2.10 gas path docking quick plug connector, 2.11 gas path docking quick plug connector, 2.12 diamond pin, 2.13 fixed gas path receiving block output gas path docking connector, 2.14 base plate gas path docking block gas path docking connector. DETAILED DESCRIPTION

[0039] In an embodiment of the present application, an automatic loosening and clamping control device for a zero-point positioning base plate of a rotary machine tool is provided. A mobile air path propulsion device and a fixed air path receiving and distribution device are added to the rotary machine tool. The automatic docking of the air path docking device is controlled by the air path control system to provide the zero-point positioning system base plate with 4-way compressed air required for loosening and clamping. The pneumatic control system is integrated with the machine tool CNC system to realize automatic loosening or clamping of the zero-point positioning system base plate by sending instructions through the machine tool, and the status of each component inside the system is monitored to ensure safety and reliability during operation.

[0040] Among them, the mobile air path propulsion device is installed on the linear axis guide rail protection plate of the rotary table machine tool. When the machine tool is working, it only follows the machine tool guide rail for linear motion and does not rotate with the worktable. It receives the multi-channel air path pipelines and control cables provided by the pneumatic control system through the cable and air pipe protection bellows interface, rearranges the air path and circuit pipelines neatly in the air path and cable installation assembly, and then connects 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-plug connector of the air distribution block) through the air path distribution quick-plug pipeline interface. At the same time, the control cable communicates with the control elements such as sensors of each module through the signal line.

[0041] Among them, the mobile air path propulsion device is equipped with one air source for the telescopic movement of the cylinder. When the pneumatic control system receives the signal of 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 round pin of the fixed air path receiving and distribution device through the round pin hole to realize the connection and supply of the air path.

[0042] Among them, the fixed gas path receiving and distribution device is installed on the workbench of the turntable machine tool. When the machine tool is working, it rotates with the workbench. Its main function is gas path docking, transfer and distribution. It receives the multi-channel gas source provided by the mobile gas path propulsion device through the gas path docking quick-plug connector. After passing through the internal structure, 6 independent gas sources are output through the fixed gas path receiving block output gas path docking connector. One gas source is connected to the P2 gas path interface of the gas path docking connector of the base plate gas path docking block to control the opening of the chuck, and the other gas source is connected to the gas path docking of the base plate gas path docking block. The P6 air circuit interface of the connector is used to monitor the opening status of the chuck; 3 air sources are merged into 1 total air source, which is connected to the P3 air circuit interface of the air circuit docking connector of the base plate air circuit docking block to clean aluminum chips and other debris on the contact positioning surface of the chuck when the base plate is loosened. At the same time, after the tray and the base plate are docked, the closed feedback air pressure value of this circuit is used to determine whether the zero point base plate is clamped; 1 air source is connected to the P4 air circuit interface of the air circuit docking connector of the base plate air circuit docking block to control the opening and closing of the re-clamping function of the zero point positioning system.

[0043] Among them, the mobile air path propulsion device is equipped with a docking device to clean the air source, which is led out through the air path distribution quick-plug pipeline and connected to the air source input quick-plug connector on the air distribution block. Then, compressed air is output at the cleaning nozzle to clean the round pin holes, diamond pin holes, air path docking quick-plug connectors, positioning round pins, aluminum chips and other debris attached to the diamond pins at fixed points to ensure smooth and reliable air path docking process.

[0044] Among them, the pneumatic control system is integrated with the machine tool CNC system, receives and executes the PLC instructions issued by the machine tool, converts the external air source into multiple air circuits with specific pressure and flow, and transmits them to the air circuit propulsion device. At the same time, it monitors the operating status of each component of the air circuit docking device in real time and feeds back to the machine tool CNC system, realizes the automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, and ensures safety and reliability during the docking process.

[0045] In other embodiments of the present application, a control system for automatic loosening and clamping of a zero-point positioning base plate of a rotary machine tool is provided, and an air circuit docking device is added to the rotary machine tool: a mobile air circuit propulsion device and a fixed air circuit receiving and distribution device. Automatic docking of the air circuit docking device is achieved through the air circuit control system, and four air circuits required for loosening and clamping of the zero-point positioning system base plate are provided; the air circuit control system is integrated with the machine tool CNC system, so that the zero-point positioning system base plate can be automatically loosened or clamped by sending instructions through the machine tool. At the same time, the air circuit control system can monitor the status of each component inside the air circuit docking device to ensure safety and reliability during operation.

[0046] Among them, the mobile air path propulsion device is installed on the linear axis guide rail protection plate 5 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 make rotational motion with the worktable. During the installation process, the air path propulsion device takes into account the installation distance when the machine tool worktable rotates, and reserves a sufficient safety distance to ensure that the retracted position of the mobile air path propulsion device does not interfere with the rotary table of the machine tool when the machine tool worktable rotates.

[0047] Among them, the supporting base of the mobile air circuit docking device is a propulsion device installation base plate installed on the linear axis guide rail protection plate of the rotary table machine tool. The air circuit and cable installation assembly is installed on the base plate through threaded connection, and the cable and air pipe protection bellows interface is installed on the air circuit and cable installation assembly through the bellows quick-plug connector. It is used to receive multiple air circuit pipelines and control cables provided by the pneumatic control system, and rearrange the received air circuits and circuit pipelines neatly in the air circuit and cable installation assembly, and then distribute the quick-plug pipeline interface through the air circuit, and connect to the air circuit docking interface of each module in the propulsion device (including the cylinder control air circuit input point, the docking air circuit pipeline and the air source input quick-plug connector of the air distribution block) through the air pipe. At the same time, the control cable communicates with control elements such as sensors of each module through signal lines.

[0048] Among them, the mobile air circuit docking device is equipped with one air source for the telescopic movement of the cylinder, the cylinder mounting seat 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 frame is installed on the cylinder mounting seat through a threaded connection, the propulsion cylinder is fixedly connected to the cylinder tail end mounting frame, the cylinder piston push rod and the cylinder front end mounting bracket are fixed together through bolts and nuts; the bottom of the air distributor 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, and the movable valve block is installed on the valve block mounting seat; when the cylinder advances forward or retreats backward, it drives the front end mounting bracket, the air distributor block and the movable valve block to move forward and backward together, and the movable valve block drives the valve block mounting seat to slide back and forth on the guide rail, thereby realizing the advancement and retreat action of the propulsion air circuit.

[0049] Among them, when the pneumatic control system receives the signal of air circuit docking, it sends a signal by controlling the air circuit input point, controls the cylinder piston to extend forward, pushes the air distributor block and the movable valve block to move forward along the guide rail, and the movable valve block is docked and positioned with the positioning round pin and diamond pin of the fixed air circuit receiving and distribution device through the round pin hole and the diamond pin hole, and then the 6 air circuit docking quick connectors of the propulsion device and the 6 air circuit docking quick connectors of the receiving and distribution device are squeezed to open the internal one-way valve to realize the connection and supply of the air circuit.

[0050] Among them, the fixed gas path receiving and distribution device is installed on the workbench of the turntable machine tool. When the machine tool is working, it rotates with the workbench. The main function is gas path docking, transfer and distribution. It receives 6 separate gas sources provided by the mobile gas path propulsion device through the gas path docking quick-plug connector, passes through the internal structure, and outputs 6 independent gas sources through the fixed gas path receiving block output gas path docking connector. The gas paths are connected by gas path hoses, of which 1 gas source is connected to the P2 gas path interface of the gas path docking connector of the gas path docking block of the base plate, which is used to provide compressed air of a specific pressure to control the opening of the chuck; 1 gas source is connected to the P6 gas path interface of the gas path docking connector of the gas path docking block of the base plate, which is used to monitor the opening status of the chuck. The gas flow of this gas path is detected by a flowmeter to determine whether the chuck on the base plate can be opened. The flowmeter signal is transmitted through the pneumatic control The pressure sensor is transmitted to the CNC system through the pneumatic control system, which is used by the CNC system to judge whether the base plate is loosened and whether the conditions for exchanging the pallet are met; the 3-way air source is merged into 1 total air source, which is connected to the P3 air channel interface of the air channel docking joint of the air channel docking block of the base plate to provide compressed air to clean the aluminum chips and other debris on the contact positioning surface of the chuck when the base plate is loosened. At the same time, after the pallet and the base plate are docked, the closed feedback air pressure value of this channel is used to judge whether the zero-point base plate is clamped. The signal of the pressure sensor is transmitted to the CNC system through the pneumatic control system, which is used by the CNC system to judge whether the base plate is clamped and whether the conditions for subsequent processing are met; 1 air source is connected to the P4 air channel interface of the air channel docking joint of the air channel docking block of the base plate to provide compressed air at a specific pressure, which is used to control the opening and closing of the re-clamping function of the zero-point positioning system.

[0051] After the pallet is replaced, when the pneumatic control system receives the signal that the air circuit docking is completed, it controls the cylinder to retreat by sending a signal, pushes the air distributor block and the movable valve block to move backward along the guide rail, and the movable valve block is separated from the fixed air circuit receiving and distribution device, retreats to a safe position, and completes the opening and clamping automatic control function of the zero-point positioning base plate. A cylinder movement following device is installed on the side of the valve block mounting seat, and a cylinder retraction proximity switch and a cylinder advancement proximity switch are installed at the retraction and in-position positions of the cylinder movement. The proximity switch is triggered by the following device 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 is advanced into place during air circuit docking, whether it returns to a safe position after the air circuit docking is completed, and whether subsequent processing can be started.

[0052] Among them, the mobile air path propulsion device is equipped with a docking device to clean the air source, which is led out through the air path distribution quick-plug pipeline and connected to the air source input quick-plug connector on the air distribution block. After passing through the internal structure of the air distribution block, compressed air is output at the cleaning nozzle to clean the round pin holes, diamond pin holes, air path docking quick-plug connectors, positioning round pins and diamond pins that may be attached to the aluminum chips and other debris generated during the machine tool processing to ensure smooth and reliable air path docking process.

[0053] Preferably, in order to ensure the reliability of the docking device and prevent the contamination of aluminum chips and coolant during the machining process of the machine tool, a mobile air path propulsion device protective cover and a fixed air path receiving and distribution device protective cover are respectively added to the mobile air path propulsion device and the fixed air path receiving and distribution device. The mobile air path propulsion device protective cover is installed on the mobile air path propulsion device protective cover mounting fixing rod by bolts, and the fixed air path receiving and distribution device protective cover is installed and fixed by bolts on the side of the fixed air path receiving block. At the same time, the docking device introduces external air paths and signal lines through the cable protection bellows and is centrally pulled to the top of the machine tool, 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 CNC system, receives and executes the PLC instructions issued by the machine tool, converts the external air source into multiple air circuits with specific pressure and flow, and transmits them to the air circuit fixed propulsion device. At the same time, it monitors the operating status of each component of the air circuit docking device in real time and feeds 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 implementation process.

[0055] In other embodiments of the present application, see the attached Figure 1-Figure 6, a rotary machine tool zero-point positioning base plate automatic loosening and clamping control system is provided. Taking a typical rotary machine tool structure as an example, the zero-point positioning system base plate 4 is installed in the center of the rotary table 3, and a gas path docking device is added to the rotary machine tool: a mobile gas path propulsion device 1 and a fixed gas path receiving and distributing device 2, and the gas path docking device is controlled by the gas path control system to provide the zero-point positioning system base plate with 4 gas paths required for loosening and clamping. The pneumatic control system is integrated with the machine tool CNC system to realize that the zero-point positioning system base plate can be automatically loosened or clamped by sending instructions from the machine tool, and the status of each component inside the system is monitored to ensure safety and reliability during operation.

[0056] The mobile air path propulsion device 1 is installed on the rotary machine tool linear axis guide rail protection plate 5 through the docking device and the bolt mounting base plate 1.4. When the machine tool is working, it only follows the machine tool guide rail for linear motion and does not make rotational motion with the worktable. During the installation process, the air path propulsion device takes into account the installation distance when the machine tool worktable rotates, and reserves a sufficient safety distance to ensure that the mobile air path propulsion device 1 does not interfere with the rotary machine tool worktable 3 when the machine tool rotates.

[0057] The supporting base of the mobile air circuit docking device 1 is a propulsion device mounting base plate 1.4 installed on the rotary table machine tool linear axis guide rail protection plate 5, and the air circuit and cable installation assembly 1.2 is installed on the base plate 1.4 through a threaded connection. The cable and air pipe protection bellows interface 1.1 is installed on the air circuit and cable installation assembly 1.2 through a bellows quick-plug connector, which is used to receive multiple air circuit pipelines and control cables provided by the pneumatic control system, and rearrange the received air circuits and circuit pipelines in the air circuit and cable installation assembly 1.2, and then distribute the air circuit through the quick-plug pipeline interface 1.3, and then connect to the air circuit docking interfaces of each module in the propulsion device (including the cylinder control air circuit input point 1.9, the docking air circuit pipeline 1.8 and the air source input quick-plug connector 1.14 of the air distributor block), and at the same time, the control cable communicates with the control elements such as sensors of each module through the signal line.

[0058] The mobile gas circuit docking device is equipped with one gas source for the telescopic movement of the cylinder. The cylinder mounting seat 1.6 and the propulsion guide rail 1.16 are connected and fixed to the propulsion device mounting base plate 1.4 through the guide rail mounting support 1.5. The cylinder tail end mounting frame 1.10 is installed on the cylinder mounting seat 1.6 through a threaded connection. The propulsion cylinder 1.11 is fixedly connected to the cylinder tail end mounting frame 1.10. The cylinder piston push rod is fixedly connected to the cylinder front end mounting bracket 1.12 through bolts and nuts. The bottom of the block 1.13 is fixedly connected to the movable valve block 1.20, and the upper end is connected and fixed to the front end mounting bracket 1.12 through a countersunk thread. The movable valve block 1.20 is installed on the valve block mounting seat 1.15; when the cylinder advances forward or retreats backward, it drives the front end mounting bracket 1.12, the air distributor block 1.13 and the movable valve block 1.20 to move forward and backward together, and the movable valve block 1.20 drives the valve block mounting seat 1.15 to slide forward and backward on the guide rail 1.16, thereby realizing the advancement and retreat actions of the propulsion gas path.

[0059] When the pneumatic control system receives the signal of air circuit docking, it sends a signal through the cylinder control air circuit input point 1.9 to control the piston of the propulsion cylinder 1.11 to extend forward, pushing the air distributor block 1.13 and the movable valve block 1.20 to move forward along the guide rail. The movable valve block is positioned and docked with the positioning round pin 2.5 and diamond pin 2.12 of the fixed air circuit receiving and distributing device 2 through the round pin hole 1.21 and the diamond pin hole 1.24. Then, the six air circuit docking quick-connect connectors 1.23 of the propulsion device and the six air circuit docking quick-connect connectors (2.6~2.11) of the receiving and distributing device open the internal one-way valve by squeezing, so as to realize the connection and supply of the air circuit. The limit block 2.4 plays a role of limiting protection for the propulsion device during the docking process.

[0060] The fixed gas path receiving and distributing device 2 is installed and fixed on the workbench of the turntable machine tool by countersunk bolts. When the machine tool is working, it rotates with the workbench. The main function is gas path docking, transfer and distribution. It receives 6 independent gas sources provided by the mobile gas path propulsion device 1 through the gas path docking quick plug connector (2.6~2.11), and outputs 6 independent gas sources through the fixed gas path receiving block output gas path docking connector 2.13 through the internal structure. The connection between the gas paths relies on the gas path hose, among which 1 gas source (2.11) is connected to the P2 gas path interface of the gas path docking connector 2.14 of the gas path docking block of the base plate, which is used to provide compressed air of a specific pressure to control the opening of the chuck. 1 gas source (2.10) is connected to the P6 gas path interface of the gas path docking connector 2.14 of the gas path docking block of the base plate, which is used to monitor the opening status of the chuck. The gas flow of this gas path is detected by a flow meter to determine whether the chuck on the base plate can be opened. The flow meter signal is passed through The pneumatic control system transmits to the numerical control system, which is used by the numerical control system to determine whether the base plate is loosened and the conditions for exchanging the pallet are met; the three air sources (2.6 / 2.7 / 2.8) are combined into one total air source by the quick-connect connector 2.8, which is connected to the P3 air channel interface of the air channel docking connector 2.14 of the air channel docking block of the base plate, and by providing compressed air, the aluminum chips and debris used for the contact positioning surface of the chuck when the base plate is loosened are cleaned. At the same time, after the pallet and the base plate are docked, the closed feedback air pressure value of this channel is used to determine whether the zero point base plate is clamped. The signal of the pressure sensor is transmitted to the numerical control system through the pneumatic control system, which is used by the numerical control system to determine whether the base plate is clamped and the conditions for subsequent processing are met; one air source (2.9) is connected to the P4 air channel interface of the air channel docking connector 2.14 of the air channel docking block of the base plate, which is used to provide compressed air with a specific pressure, which is used to control the opening and closing of the re-clamping function of the zero point positioning system.

[0061] After the pallet is replaced, when the pneumatic control system receives the signal that the air circuit docking is completed, it sends a signal by controlling the air circuit input point 1.9 to control the piston of the cylinder 1.11 to move backward, push the air distributor 1.13 and the movable valve block 1.20 to move backward along the guide rail, and the movable valve block is separated from the fixed air circuit receiving and distributing device and retreats to a safe position, completing the automatic opening and clamping control function of the zero-point positioning base plate, and installing the cylinder movement following device 1.17 on the side of the valve block mounting seat 1.15, and installing the cylinder retreat proximity switch 1.19 and the cylinder push-in proximity switch 1.18 at the retreat and in-position positions of the cylinder movement. The proximity switch is installed on the propulsion device mounting base plate 1.4, and the triggering of the proximity switch by the following device 1.17 during the cylinder movement feeds back the triggering signal to the machine tool through the pneumatic control system, and the machine tool determines whether the cylinder is pushed into place when the air circuit is docked, whether it returns to a safe position when the air circuit docking is completed, and whether subsequent processing can be started.

[0062] The mobile air path propulsion device is equipped with a docking device to clean the air source, which is led out through the air path distribution quick-plug pipeline 1.3 and then connected to the air distributor block air source input quick-plug connector 1.14 on the air distributor block 1.13. After passing through the internal structure of the air distributor block, the compressed air is output at the cleaning nozzle 1.22 to clean the aluminum chips and other debris generated during the machine tool processing that may be attached to the round pin hole 1.21, diamond pin hole 1.24, air path docking quick-plug connector 1.23, positioning round pin 2.5 and diamond pin 2.12 at a fixed point to ensure stability and reliability during the air path docking process.

[0063] A large amount of aluminum chips and coolant are generated during the machining process of the machine tool. In order to ensure the reliability of the docking device, a mobile air path propulsion device protective cover 6 and a fixed air path receiving and distribution device protective cover 8 are added to the mobile air path propulsion device 1 and the fixed air path receiving and distribution device 2 respectively, so as to increase the function of the docking device to prevent aluminum chips and coolant. The mobile air path propulsion device protective cover 6 is installed on the mobile air path docking device protective cover mounting fixed rod 1.7 by bolts, and the fixed rod 1.7 is installed on the cylinder mounting seat 1.6 by bolt connection; the fixed air path receiving and distribution device protective cover 8 is installed and fixed by bolts on the side of the fixed air path receiving block 2.3. At the same time, the air path and signal lines introduced into the docking device are centrally pulled to the top of the machine tool through the cable protection bellows 7, and then connected to the external air path and the machine tool control system.

[0064] The pneumatic control system is integrated with the machine tool CNC system to receive and execute PLC instructions issued by the machine tool, convert the external air source into multiple air circuits with specific pressure and flow, and transmit them to the air circuit fixed propulsion device. At the same time, it monitors the operating status of each component of the air circuit docking device in real time and feeds back to the CNC system, realizing automatic clamping and loosening of the zero-point positioning base plate during pallet exchange, ensuring safety and reliability during the docking process.

[0065] Specific control process: the pneumatic control system receives the machine tool pallet exchange instruction, determines that the machine tool exchange workbench is in the exchange docking fixed position, and sends the cylinder advancement 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 docking device cleaning air source through the solenoid valve, cleans the docking device positioning pin hole and the air path docking interface, and after the cylinder is pushed into place, the proximity switch feedbacks that the cylinder is in place. After receiving the signal, the control system opens the 6-way docking air path through the solenoid valve, controls the opening of the chuck on the base plate through the P2 air path, cleans the chuck through the P3 air path, and monitors the flow rate of this path through the air flow meter connected to the P6 air path. When the flow rate reaches the set value, it is determined that the base The plate chuck has been released, and the signal is fed back to the machine tool CNC system. The machine tool starts to fork and replace the pallet. When the pallet replacement is completed, the pneumatic control system monitors the pressure value of this line through the pressure sensor connected to the P3 air circuit. When the pressure value reaches the set value, it is determined that the basic plate chuck has been clamped, and the signal is fed back to the machine tool CNC system. At the same time, the solenoid valve is controlled to provide compressed air to the P4 air circuit to control the pallet to be clamped again. After the pallet is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve, and the cylinder piston starts to retract. After the cylinder retracts into place, the retraction proximity switch is used to feedback that the cylinder has retracted into place. The control system receives the signal and feeds back the signal to the machine tool CNC system, notifying the CNC machine tool that subsequent processing can begin.

Claims

1. A rotary table machine tool zero point positioning base plate control device, characterized in that: The control device comprises: Rotary machine tool table, used to install the zero-point positioning system base plate; The mobile gas path propulsion device is installed on the linear axis guide rail protection plate of the rotary table type machine tool. When the machine tool is working, the mobile gas path propulsion device only follows the machine tool guide rail to make linear motion; A fixed gas path receiving and distributing device is installed on the rotary table machine tool worktable and can rotate together with the rotary table machine tool worktable. The fixed gas path receiving and distributing device is used for gas path docking, transfer and distribution.

2. The control device according to claim 1, characterized in that: A safety distance is reserved between the mobile gas path propulsion device and the rotary table machine tool worktable.

3. The control device according to claim 1, characterized in that: The control device also includes: Mobile gas path propulsion unit protective cover to protect against aluminum chips and coolant; Fixed gas line receiving and distributing device protective cover to prevent aluminum chips and coolant.

4. A method for controlling a zero-point positioning base plate of a rotary machine tool, characterized in that: The control method comprises: The CNC system of the machine tool issues a command for changing the machine tool pallet; The pneumatic control system receives the machine tool pallet exchange instruction, determines that the machine tool exchange worktable is in the exchange docking fixed position, and sends a cylinder push 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 docking device cleaning air source through the solenoid valve to clean the docking device positioning pin hole and the air path docking interface. After the cylinder is pushed into place, the proximity switch is used to feedback that the cylinder is in place. After the pneumatic control system receives the cylinder in place signal, it opens the 6-way docking air circuit through the solenoid valve, controls the opening of the chuck on the base plate through the P2 air circuit, cleans the chuck through the P3 air circuit, and monitors the flow rate of this circuit through the air flow meter connected to the P6 air circuit. When the flow rate reaches the set value, it is judged that the chuck of the base plate has been loosened, and the signal is fed back to the machine tool CNC system. The machine tool starts to fork the pallet for replacement. When the pallet replacement is completed, the pneumatic control system monitors the pressure value of this circuit through the pressure sensor connected to the P3 air circuit. When the pressure value reaches the set value, it is judged that the chuck of the base plate 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 comprises: The control solenoid valve provides compressed air for the P4 air circuit to control the pallet to be clamped again. After the pallet is clamped, the pneumatic control system sends a cylinder retraction signal through the solenoid valve, and the cylinder piston begins to retract. After the cylinder retracts into place, the retraction proximity switch is used to feedback that the cylinder has retracted into place. 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.

6. A rotary table machine tool zero point positioning base plate control system, characterized in that: The control system comprises: Machine tool CNC system, used to issue machine tool pallet exchange instructions; 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 propulsion device. At the same time, the operating status of each component of the air path docking device is monitored in real time and fed 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 connected to the pneumatic control system, the motion control module being used to clean the air path and propel the cylinder; A status monitoring module is connected to the system control system, and the status monitoring module is used to monitor the operating status of each component of the gas path docking device.

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

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

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