Large thin-wall shell intelligent boring and milling production line and operation method

Abstract

The invention discloses a large thin-wall shell intelligent boring and milling production line and an operation method, and belongs to the field of thin-wall shell automatic production lines. The production line mainly comprises key equipment such as a double-station boring and milling main machine, a feeding and discharging table, a truss robot, a cache material warehouse, a cleaning machine, a master control system operation table and a safety fence. A feeding and discharging table, a double-station boring and milling main machine and a cleaning machine in the production line are arranged in a line, and four cache material warehouses are arranged. The truss robot is arranged above all the devices and used for assisting product transfer, and an operation area is isolated through a safety fence. A master control system operation table is arranged outside the safety fence, and task scheduling, product management and equipment monitoring of the whole production line are achieved through a master control system so that automatic boring and milling machining of the large thin-wall shell can be completed. The flexible double-line machining device has high flexibility and has the capability of simultaneous mixed-line machining of two products, and the machining efficiency and the machining precision of the products are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of automated production lines for large thin-walled shells, and relates to an intelligent boring and milling production line and its operation method for large thin-walled shells. Background Technology

[0002] Large thin-walled shells, as key components of solid rocket motors, play crucial roles in fuel storage, precision instrument installation, and flight trajectory support. Their manufacturing level and production capacity directly impact the operational performance of my country's solid rocket motors. Under the demand for high-volume production of key equipment in my country's new era, traditional single-machine or unit-level manufacturing systems for large thin-walled shells, such as solid rocket motor fuel tanks, are no longer sufficient to meet the urgent needs of intensive development and rapid mass production of various equipment models. Therefore, transforming the inefficient "traditional single-machine / unit + manual operation" production model into an "automated production line" manufacturing model is of great significance in improving the production efficiency of large thin-walled shells.

[0003] Currently, large thin-walled shells are machined using a multi-station assembly line method, where multiple machines sequentially perform boring and milling operations on various features of the shell. This process involves long auxiliary times and heavy reliance on worker experience, significantly limiting the efficiency and quality of machining large thin-walled shells. Therefore, developing an intelligent boring and milling production line for large thin-walled shells is crucial for improving both efficiency and quality.

[0004] Scholars in related fields have conducted some research on production line technologies. The patent "Fully Automated Machining Production Line for Front Axles" (application number: CN202010947205.6) discloses a fully automated machining production line for automotive front axles, used to complete the machining and key dimension inspection of automotive front axles. However, it has poor adaptability to machining large thin-walled shells of different characteristics and sizes. The patent "Machining Production Line for Shaft Workpieces" (application number: CN202211215179.3) discloses a machining production line for shaft workpieces, which can complete the turning and grinding of shaft parts. However, it has poor adaptability to large thin-walled shells, which are rigid parts, and is less adaptable to large thin-walled shells with weak rigidity and easy deformation. The above research has not yet mentioned an intelligent boring and milling production line for large thin-walled shells. Summary of the Invention

[0005] This invention addresses the need for high-quality and high-efficiency machining of large thin-walled shells by proposing an intelligent boring and milling production line and its operation method for large thin-walled shells.

[0006] The technical solution adopted in this invention is:

[0007] A large-scale thin-walled shell intelligent boring and milling production line includes: a dual-station boring and milling machine, an infeed / outfeed platform, a gantry robot, a buffer silo, a cleaning machine, a central control system console, and a safety fence. The infeed / outfeed platform is located on the left side of the production line. It contains a support platform adapted to the shape of the large thin-walled shell, which guides the infeed / outfeed of the shell via guide rails. Two industrial cameras are also installed on the platform to verify the model of the shells, ensuring the accuracy of the shells entering the production line. The dual-station boring and milling machine is located on the right side of the platform. The dual-station boring and milling machine includes a dual-column main unit, two sets of horizontal worktables, and a chip removal device. The dual-column main unit is used to process large thin-walled shells, and the two sets of horizontal worktables provide a platform for processing the large thin-walled shells. The chip removal device is installed between the dual-column main unit and the horizontal worktables to collect chips and cutting fluid generated during processing. The two horizontal worktables share one chip removal device. A cleaning machine is placed on the right side of the dual-station boring and milling machine to clean the large thin-walled shells after processing. Multiple buffer silos are arranged opposite the dual-station boring and milling machine. The buffer silos are equipped with photoelectric sensors to detect the presence of large thin-walled shells and determine whether the buffer needs to be cleared. A gantry robot is placed above the dual-station boring and milling machine, the loading and unloading platforms, the buffer silos, and the cleaning machine to assist in the transfer of large thin-walled shells. The operating area of ​​the intelligent boring and milling production line for large thin-walled shells is isolated by a safety fence. A central control system console is set up outside the safety fence. The central control system enables the overall task scheduling, management of large thin-walled shells, and equipment monitoring of the intelligent boring and milling production line for large thin-walled shells, so as to realize the automated boring and milling of large thin-walled shells.

[0008] Furthermore, the dual-column main unit includes two single-column main units, two main unit bases, two chain-type tool magazines, two single-pendulum spindles, and two line laser sensors. The single-column main unit adopts a boring and milling machine structure. The chain-type tool magazines, single-pendulum spindles, and line laser sensors are mounted on the single-column main unit. The two main unit bases are connected to form a single base, and the two single-column main units are mounted on guide rails of the single base. With the soft limiters removed, the single-column main units can move to any position on the single base. The horizontal worktable adopts a dual CNC rotary table and center support structure. A single-station horizontal worktable includes a worktable base, two horizontal fourth-axis rotary tables, a hydraulic center support, and two hydraulic self-centering chucks. The two horizontal fourth-axis rotary tables and the hydraulic center support are mounted on guide rails of the worktable base, with the hydraulic center support located between the two horizontal fourth-axis rotary tables. All can move along the guide rail direction via servo motors. The worktable base is on one side of the main unit base, and the two are arranged parallel to each other. The hydraulic self-centering chuck is mounted on a horizontal fourth-axis rotary table, enabling self-centering clamping of various large thin-walled shells.

[0009] The loading / unloading platform includes a base, a loading platform, V-shaped supports, a fixed industrial camera, a mobile industrial camera, an electric cylinder, and a fixed bracket. The loading platform is mounted on the guide rail of the base and can automatically move along the guide rail direction via a motor, thereby enabling the loading and unloading of large thin-walled shells. The V-shaped supports are used to hold the large thin-walled shells and are mounted on the guide rail of the loading platform. To accommodate large thin-walled shells of different lengths, multiple V-shaped supports are arranged along the guide rail direction of the loading platform. These V-shaped supports can move along the guide rail on the loading platform to ensure the scalability of the production line. All large thin-walled shells are placed with the beginning of the loading / unloading platform as the positioning reference. The fixed industrial camera is mounted on the fixed bracket, which is connected to the side of the beginning of the base. The mobile industrial camera is mounted on the electric cylinder, which is mounted on the fixed bracket. It can move to the corresponding position according to the length of the large thin-walled shell, enabling the detection of key dimensions of the large thin-walled shell.

[0010] The gantry robot adopts a gantry-type gantry structure with five axes driven by servo motors. A gripper is installed at the end of the gantry robot, which can adaptively grasp various large, thin-walled shells.

[0011] The cleaning machine includes a water storage tank, a large thin-walled shell support, a cleaning water gun, an air blowing mechanism, a moving electric cylinder, and a lifting cylinder. The large thin-walled shell support is used to hold the large thin-walled shell. The support and the water storage tank are hinged together by a hinge support. During cleaning, the lifting cylinder inside the water storage tank lifts the support, which rotates around the hinge support to ensure the shell is tilted. The cleaning water gun is mounted on the moving electric cylinder, which is fixed to the support. The water gun extends into the large thin-walled shell via the cylinder to clean its inner wall. The air blowing mechanism, fixed to the support and driven by a small cylinder, is used to remove residual chips from the inner wall after cleaning. The water storage tank collects the cleaning fluid and chips generated during the cleaning process and is manually emptied periodically.

[0012] The buffer silo comprises a main frame, V-shaped supports, and photoelectric sensors. An array of detachable V-shaped supports is fixed to the main frame. To ensure the expandability of the buffer silo, multiple expansion threaded holes are machined on the main frame for adjusting the position of the V-shaped supports according to the needs of large, thin-walled shells. A photoelectric sensor is fixed to the first V-shaped support in each row of the main frame. Once the buffer silo is full of finished products, the intelligent boring and milling production line for large, thin-walled shells will notify the external system to clear the inventory.

[0013] Furthermore, the loading / unloading platforms, gantry robot, cleaning machine, and buffer silo are uniformly controlled via a Siemens PLC, while the dual-station boring and milling machine is controlled by a Siemens CNC system. The entire production line is integrated and controlled through a central control system console, which links the central control system console with the PLC and CNC system via S7 and OPCUA communication respectively, for task scheduling, management of large thin-walled shells, and status monitoring.

[0014] Furthermore, the intelligent boring and milling production line for large thin-walled shells will be expanded as needed to adapt to different processing requirements. Details are as follows:

[0015] The dual-station boring and milling machine can be extended by increasing the number of machine bases and worktable bases, while also adding a single-column machine and a horizontal single-station worktable, expanding the dual-station boring and milling machine to an N-station model. The gantry robot adopts a segmented beam structure and continues to extend according to the expansion of the N-station boring and milling machine, realizing the overall expansion of the large-scale thin-walled shell intelligent boring and milling production line. The buffer material storage can be expanded to N buffer material storage units according to the extension of the gantry robot length, improving the production line's storage capacity. The central control system console has the ability to manage the N-station boring and milling machine. When a station in the N-station boring and milling machine malfunctions, the central control system isolates that station. This station will be disabled, and the central control system will not assign tasks to it, but it will not affect the normal operation of other stations. When the station is repaired, it will be released from the central control system and continue to participate in production line operations.

[0016] A method for intelligent boring and milling machining of large thin-walled shells is as follows:

[0017] Step 1: Manual feeding and operation;

[0018] The large thin-walled shell is manually hoisted and placed on the infeed and discharge platform, and the relevant information of the large thin-walled shell is input through the control system console.

[0019] Step 2: Large thin-walled shells enter the production line;

[0020] After the information of the large thin-walled shell is entered into the central control system, the loading / unloading platform carries the large thin-walled shell into the production line. The moving industrial camera on the loading / unloading platform, based on the model number of the large thin-walled shell obtained from the central control system, moves to a designated position to verify the model number. If the model number is detected as incorrect, the loading / unloading platform removes the large thin-walled shell from the production line, and the central control system simultaneously issues an alarm, requiring manual re-verification and adjustment. If the model number is detected as normal, the large thin-walled shell enters the production line.

[0021] Step 3: Large thin-walled shells are put into storage;

[0022] The central control system automatically allocates storage locations for large thin-walled shells within the buffer warehouse based on the current model of the shell and the inventory status of the buffer warehouse. Simultaneously, it dispatches gantry robots to transport the large thin-walled shells to the corresponding storage locations.

[0023] Step 4: The large thin-walled shell is transported to the processing location;

[0024] After the production line starts, the central control system automatically allocates the workstations for the large thin-walled shells to be processed based on the priority of the large thin-walled shells and the availability of the horizontal worktables. It also dispatches the gantry robot to transport the large thin-walled shells to the corresponding workstations and, together with the dual-station boring and milling machine, installs the large thin-walled shells on the hydraulic self-centering chuck and hydraulic center frame.

[0025] Step 5: Automated boring and milling of large thin-walled shells;

[0026] After the large thin-walled shell is loaded onto the horizontal worktable, the control system automatically calls the machining program in the dual-station boring and milling machine according to the model of the large thin-walled shell, and completes the automated boring and milling machining of the large thin-walled shell.

[0027] Step 6: Large thin-walled shells are unloaded and transported to the cleaning machine;

[0028] After the large thin-walled shell is processed, the central control system dispatches a gantry robot to move the shell to the horizontal worktable based on the current availability of the cleaning machine. The shell is then tilted to drain any remaining cutting fluid. The shell is then transferred to the cleaning machine.

[0029] Step 7: Cleaning of large thin-walled shells;

[0030] According to the model of the large thin-walled shell, the cleaning machine moves the cleaning water gun to the corresponding cleaning position and begins the cleaning and air blowing operation of the large thin-walled shell.

[0031] Step 8: Large thin-walled shell finished products are put into storage;

[0032] After the large thin-walled shell is cleaned, it is transported to the buffer silo by a gantry robot.

[0033] Step 9: Large thin-walled shell finished product exits the production line;

[0034] Once all the large thin-walled shells in the work order have been processed, the corresponding work order is selected through the central control system console, and the gantry robot is dispatched to transport the large thin-walled shells to the loading / unloading platform. The loading / unloading platform then transports the large thin-walled shells to the periphery of the production line, where they are manually lifted away.

[0035] The beneficial effects of this invention are as follows: Addressing the need for high-quality and high-efficiency machining of large thin-walled shells, this invention develops an intelligent boring and milling production line for large thin-walled shells. This intelligent boring and milling production line for large thin-walled shells is highly flexible and capable of simultaneously machining two types of large thin-walled shells. The intelligent boring and milling production line for large thin-walled shells is easy to use and maintain, greatly improving the machining efficiency and accuracy of large thin-walled shells. Attached Figure Description

[0036] Figure 1 This is an isometric view of the intelligent boring and milling production line for large thin-walled shells according to the present invention.

[0037] Figure 2 This is a top view of the intelligent boring and milling production line for large thin-walled shells according to the present invention.

[0038] Figure 3 This is a three-dimensional structural diagram of the dual-station boring and milling machine of the present invention, wherein (a) represents a three-dimensional structural diagram of the dual-station boring and milling machine, (b) represents a three-dimensional structural diagram of the main body side of the dual-station boring and milling machine, and (c) represents a three-dimensional structural diagram of the worktable side of the dual-station boring and milling machine.

[0039] Figure 4 This is a three-dimensional structural diagram of the infeed and discharge platform of the intelligent boring and milling production line for large thin-walled shells of the present invention.

[0040] Figure 5 This is a three-dimensional schematic diagram of the gantry robot of the present invention.

[0041] Figure 6 This is a three-dimensional structural diagram of the cleaning machine of the present invention, wherein (a) represents a three-dimensional structural diagram of the cleaning machine in a static state, and (b) represents a three-dimensional structural diagram of the cleaning machine in a working state.

[0042] Figure 7 This is a schematic diagram of the three-dimensional structure of the cache library of the present invention.

[0043] Figure 8 A schematic diagram showing the expansion of a dual-station boring and milling machine to an N-station boring and milling machine.

[0044] In the diagram: 1. Dual-station boring and milling machine; 2. Feeding and unloading platform; 3. Gantry robot; 4. Cleaning machine; 5. Buffer silo; 6. Central control system console; 7. Safety fence; 8. N-station boring and milling machine; 11. Dual-column machine; 12. Horizontal worktable; 13. Chip removal device; 21. Base; 22. Material platform; 23. V-shaped support; 24. Fixed industrial camera; 25. Mobile industrial camera; 26. Electric cylinder; 27. Fixed bracket; 31. Gripper; 41. Water tank; 42. Large thin-walled shell 43. Body support; 44. Cleaning water gun; 45. Air blowing mechanism; 46. Moving electric cylinder; 57. Lifting cylinder; 58. Main frame; 59. V-shaped bracket; 50. Photoelectric sensor; 51. Expanding threaded hole; 12. Single column main unit; 13. Main unit base; 14. Chain tool magazine; 15. Single pendulum spindle; 16. Line laser sensor; 17. Workbench base; 18. Horizontal fourth axis turntable; 19. Hydraulic center frame; 10. Hydraulic self-centering chuck; 11. Hinge support. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0046] This production line is suitable for large, thin-walled cylindrical metal parts with diameters between Φ190mm and Φ500mm and lengths within 5000mm. It is used for automated boring and milling of features such as the end faces of connecting flanges at both ends, various hole systems on the outer diameter, irregular grooves, windows, and the contours and holes of external components. The large, thin-walled shell has two concentric ring fixtures at both ends, supported by a center rest, used for axial machining of the large, thin-walled shell. To address the high-efficiency, high-quality machining requirements of this type of large, thin-walled shell, an intelligent boring and milling production line for large, thin-walled shells has been invented. The specific layout of the production line is as follows... Figure 1 As shown in the diagram, this production line mainly consists of a dual-station boring and milling machine (1), a material handling station (2), a gantry robot (3), a cleaning machine (4), four buffer silos (5), a central control system control panel (6), and a safety fence (7). This production line is a flexible processing line for large thin-walled shells, possessing a certain degree of versatility for the large thin-walled shells it handles, and also capable of simultaneously processing at least two types of large thin-walled shells on the same line.

[0047] Depend on Figure 2As shown, the overall layout of this intelligent boring and milling production line for large thin-walled shells is rectangular. The infeed / outfeed platform 2 is located on the left side of the line, used for handling the loading and unloading of large thin-walled shells. The dual-station boring and milling machine 1 is located on the right side of the infeed / outfeed platform 2, used for automated boring and milling of large thin-walled shells. The cleaning machine 4 is located on the right side of the dual-station boring and milling machine 1, used for cleaning the large thin-walled shells after machining. Multiple buffer material storage units 5 are arranged side-by-side, placed opposite the dual-station boring and milling machine 1. A gantry robot 3 is placed above all the equipment for material handling. The operating area of ​​the gantry robot 3 is isolated by a safety fence 7. A central control system console 6 is located outside the safety fence 7, used for task scheduling, management of large thin-walled shells, and equipment monitoring.

[0048] Meanwhile, this large-scale thin-walled shell intelligent boring and milling production line is expandable. The integral base of the dual-station boring and milling main unit 1 can be extended by adding a main unit base 112. Furthermore, by adding a single-column main unit 111 and a horizontal worktable 12, the dual-station boring and milling main unit 1 can be expanded to an N-station boring and milling main unit 8. The N-station boring and milling main unit 8 is shown below. Figure 8 The gantry robot 3 adopts a segmented beam structure and can be extended according to the expansion of the N-station boring and milling machine 8, realizing the overall expansion of the production line. The buffer storage 5 can be expanded from four buffer storage 5s to N buffer storage 5s according to the length of the gantry robot, improving the storage capacity of the production line. Simultaneously, the central control system has the ability to manage the N-station boring and milling machine 8. When a station in the N-station boring and milling machine 8 malfunctions, the central control system can isolate that station. This station will be disabled, and the central control system will not assign tasks to it, but it will not affect the normal operation of other stations. When the station is repaired, it can be released from the central control system, and the station can continue to participate in production line operations.

[0049] The specific operation process of this production line is as follows:

[0050] Step 1: Manual feeding and operation;

[0051] The large thin-walled shell is manually hoisted and placed on the V-shaped support 23 of the infeed and discharge platform 2, and then the basic information of the large thin-walled shell is entered into the control panel 6 of the production line.

[0052] Step 2: Large thin-walled shells enter the production line;

[0053] After the information is entered, the material station 22 moves the large thin-walled shell into the visual recognition position on the production line. Based on the model number of the large thin-walled shell obtained from the central control system's operating console 6, the infeed / outfeed station 2 uses an electric cylinder 26 to move the mobile industrial camera 25 to a designated position, cooperating with the fixed industrial camera 24 to verify the model number of the large thin-walled shell. If the model number detection is abnormal, the material station 22 removes the large thin-walled shell from the production line, and the central control system's operating console 6 simultaneously triggers an alarm. Manual re-inspection and adjustment are then performed, and the shell is re-entered into the production line. If the model number detection is normal, the material station 22 continues to move the large thin-walled shell to the gripping position of the gantry robot 3.

[0054] Step 3: Large thin-walled shells are put into storage;

[0055] Once the large thin-walled shell reaches the designated gripping position, the central control system automatically allocates a storage location for the large thin-walled shell based on its model and the inventory status of the buffer warehouse 5. Simultaneously, the gantry robot 3 is dispatched to transport the large thin-walled shell to the corresponding storage location. After the large thin-walled shell is placed on the V-shaped support 52, the photoelectric sensor 53 detects the large thin-walled shell and locks the storage location in the central control system's control panel 6.

[0056] Step 4: Transport the large thin-walled shell to the processing location;

[0057] After all the large thin-walled shell blanks to be processed are transported to the buffer material warehouse 5, the command to start production line is issued from the central control system. The central control system allocates corresponding processing positions for the large thin-walled shells to be processed according to the priority of each large thin-walled shell and the availability of each station of the dual-station boring and milling machine 1. At the same time, the gantry robot 3 is scheduled to transport the large thin-walled shells to the corresponding stations. The gantry robot 3, in cooperation with the dual-station boring and milling machine 1, installs the large thin-walled shells on the hydraulic self-centering chuck 124 and the hydraulic center frame.

[0058] Step 5: Automated boring and milling of large thin-walled shells;

[0059] After the large thin-walled housing is loaded into the dual-station boring and milling machine 1, the control system operating panel 6 automatically calls the measurement-machining program within the dual-station boring and milling machine 1 according to the model of the large thin-walled housing. The reference of the large thin-walled housing is measured and extracted by the line laser sensor 115. Then, the single pendulum spindle 114 on the dual-station boring and milling machine 1 calls the corresponding tool from the chain tool magazine 113 to complete the automated boring and milling machining of the external features of the large thin-walled housing.

[0060] Step 6: Large thin-walled shells are unloaded and transported to the cleaning machine;

[0061] After the large thin-walled shell is processed, the control system console 6, based on the current availability of the cleaning machine 4, schedules the gantry robot 3 to transport the large thin-walled shell above the horizontal worktable 12, and rotates the B-axis to tilt the large thin-walled shell to pour out the residual cutting fluid inside. The large thin-walled shell is then transported to the cleaning machine 4.

[0062] Step 7: Cleaning of large thin-walled shells;

[0063] The cleaning machine 4 obtains the model number of the large thin-walled shell through the control panel 6 of the central control system, and moves the cleaning water gun 43 into the large thin-walled shell using the moving electric cylinder 45. The lifting cylinder 46 lifts the support 42 of the large thin-walled shell, and then the cleaning water gun 43 sprays water to clean the residual chips inside the large thin-walled shell. After cleaning, the air blowing mechanism 44 extends into the large thin-walled shell to clean the remaining chips. Finally, the lifting cylinder 46 lowers the support 42 of the large thin-walled shell to a flat position, completing the cleaning of the large thin-walled shell.

[0064] Step 8: Large thin-walled shell finished products are put into storage;

[0065] After the large thin-walled shell is cleaned, the control system console 6, based on the availability of the gantry robot 3, directs the gantry robot 3 to move the large thin-walled shell to the storage location previously stored in the buffer warehouse 5, thus completing the warehousing of the large thin-walled shell.

[0066] Step 9: Large thin-walled shell finished product output;

[0067] Once multiple large thin-walled shells are completed, workers can select the corresponding completed large thin-walled shell through the central control system console 6 and issue a storage command for it. The infeed / outfeed platform 2 drives the material platform 22 to move to the unloading position, and the central control system console 6 dispatches the gantry robot 3 to transport the large thin-walled shell to the unloading position. Subsequently, the material platform 22 moves the large thin-walled shell outside the production line, where it is manually lifted away, completing the processing of the large thin-walled shell.

[0068] The specific implementation examples described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific implementation examples of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-scale thin-walled shell intelligent boring and milling production line, characterized in that, include: The system includes a dual-station boring and milling machine (1), an infeed / outfeed platform (2), a gantry robot (3), a buffer silo (5), a cleaning machine (4), a central control system control panel (6), and a safety fence (7). The infeed / outfeed platform (2) is located on the left side of the intelligent boring and milling production line for large thin-walled shells. The infeed / outfeed platform (2) is equipped with a support platform adapted to the shape of the large thin-walled shell. The support platform completes the infeed / outfeed operation of the large thin-walled shell through the guide rail. The infeed / outfeed platform (2) is also equipped with two industrial cameras to complete the model replication of the large thin-walled shell. The core ensures that the large thin-walled shells entering the intelligent boring and milling production line are accurate and error-free; the dual-station boring and milling main unit (1) is placed on the right side of the infeed and discharge table (2); the dual-station boring and milling main unit (1) includes a dual-column main unit (11), two sets of horizontal worktables (12) and a chip removal device (13); the dual-column main unit (11) is used to realize the processing of large thin-walled shells, the two sets of horizontal worktables (12) are used to provide a processing platform for large thin-walled shells, and the chip removal device (13) is installed on the dual-column main unit (11). Between the horizontal worktable (12) and the two horizontal worktables (12), a chip removal device (13) is used to collect the chips and cutting fluid generated during the machining process; the two horizontal worktables (12) share a chip removal device (13); the cleaning machine (4) is placed on the right side of the dual-station boring and milling machine (1) to clean the large thin-walled shell after machining; multiple buffer silos (5) are arranged on the opposite side of the dual-station boring and milling machine (1), and photoelectric sensors are set in the buffer silos (5) to sense whether there is a large thin-walled shell, and then determine whether it is necessary to clean the buffer of the large thin-walled shell; truss machine The robot (3) is placed above the dual-station boring and milling host (1), the infeed and discharge platform (2), the buffer material warehouse (5), and the cleaning machine (4) to assist in the transfer of large thin-walled shells; the operating area of ​​the intelligent boring and milling production line for large thin-walled shells is isolated by a safety fence (7); a central control system operating console (6) is set outside the safety fence (7) to realize the overall task scheduling, management of large thin-walled shells, and equipment monitoring of the intelligent boring and milling production line for large thin-walled shells through the central control system, so as to realize the automated boring and milling of large thin-walled shells.

2. The intelligent boring and milling production line for large thin-walled shells according to claim 1, characterized in that, The dual-column main unit (11) includes two single-column main units (111), two main unit bases (112), two chain tool magazines (113), two single pendulum spindles (114), and two line laser sensors (115). The single-column main unit (111) adopts a boring and milling machine tool structure. The chain tool magazines (113), single pendulum spindles (114), and line laser sensors (115) are mounted on the single-column main unit (111). The two main unit bases (112) are connected to form an integral base. The two single-column main units (111) are mounted on the guide rails of the integral base. When the soft limit is removed, the single-column main unit (111) can move to any position on the integral base. The horizontal worktable (12) adopts a dual CNC rotary table and a central frame structure. The structure of the single-station horizontal worktable (12) includes a worktable base (121), two horizontal fourth-axis rotary tables (122), a hydraulic center frame (123), and two hydraulic self-centering chucks (124). The two horizontal fourth-axis rotary tables (122) and the hydraulic center frame (123) are mounted on the guide rails of the worktable base (121), and the hydraulic center frame (123) is located between the two horizontal fourth-axis rotary tables (122). Both can be moved along the guide rail direction by servo motor drive. The worktable base (121) is on one side of the main unit base (112), and the two are arranged in parallel. The hydraulic self-centering chuck (124) is mounted on the horizontal fourth-axis rotary table (122) and can realize the self-centering clamping of different large thin-walled shells. The loading / unloading platform (2) includes a base (21), a loading platform (22), a V-shaped support (23), a fixed industrial camera (24), a mobile industrial camera (25), an electric cylinder (26), and a fixed bracket (27). The loading platform (22) is installed on the guide rail of the base (21) and can be automatically moved along the guide rail of the base (21) by a motor drive, thereby driving the large thin-walled shell to realize the loading / unloading operation. The V-shaped support (23) is used to place the large thin-walled shell and is installed on the guide rail of the loading platform (22). In order to accommodate large thin-walled shells of different lengths, the loading platform (22) is used to place the large thin-walled shell. Multiple V-shaped supports (23) are arranged along the guide rail direction. The V-shaped supports 23 can move along the guide rail on the material platform (22) to ensure the expandability of the production line. All large thin-walled shells are placed with the beginning of the material platform (2) as the positioning reference. The fixed industrial camera (24) is installed on the fixed bracket (27), which is connected to the side of the beginning of the base (21). The mobile industrial camera (25) is installed on the electric cylinder (26), which is installed on the fixed bracket (27). It can move to the corresponding position according to the length of the large thin-walled shell to realize the detection of the key dimensions of the large thin-walled shell. The gantry robot (3) adopts a gantry gantry structure with five axes and is driven by servo motors. The end of the gantry robot (3) is equipped with a gripper (31), which can perform adaptive gripping of various large thin-walled shells. The cleaning machine (4) includes a water storage tank (41), a large thin-walled shell support (42), a cleaning water gun (43), an air blowing mechanism (44), a moving electric cylinder (45), and a lifting cylinder (46); the large thin-walled shell support (42) is used to place the large thin-walled shell; the large thin-walled shell support (42) and the water storage tank (41) are hinged together by a hinge support (411), and during the cleaning process, the large thin-walled shell support (42) is lifted by the lifting cylinder (46) inside the water storage tank (41), and the large thin-walled shell support (42) rotates around the hinge support to ensure that the large thin-walled shell is in an inclined state; the cleaning water gun (43) The cleaning water gun (43) is installed on the movable electric cylinder (45), and the movable electric cylinder (45) is fixed on the large thin-walled shell support (42). The cleaning water gun (43) extends into the large thin-walled shell through the movable electric cylinder (45) and is used to clean the inner wall of the large thin-walled shell during the cleaning process. The blowing mechanism (44) is fixed on the large thin-walled shell support (42) and is driven by a small cylinder. After cleaning, it is used to blow away the chips remaining on the inner wall. The water tank (41) is used to collect the cleaning liquid and chips generated during the cleaning process and is cleaned manually periodically. The buffer material storage (5) includes a main frame (51), a V-shaped bracket (52), and a photoelectric sensor (53). The main frame (51) has a fixed array of detachable V-shaped brackets (52). To ensure the expandability of the buffer material storage (5), the main frame (51) is machined with multiple expansion threaded holes (54) for adjusting the position of the V-shaped brackets (52) according to the situation of large thin-walled shells. The first V-shaped bracket (52) in each row of the main frame (51) is fixed with a photoelectric sensor (53). After the buffer material storage (5) is full of finished products, the large thin-walled shell intelligent boring and milling production line will notify the outside to clear the inventory.

3. The intelligent boring and milling production line for large thin-walled shells according to claim 2, characterized in that, As needed, the intelligent boring and milling production line for large thin-walled shells will be expanded to meet different processing requirements.

4. The intelligent boring and milling production line for large thin-walled shells according to claim 3, characterized in that, The dual-station boring and milling machine (1) can be extended by increasing the number of main machine bases (112) and worktable bases (121), and at the same time, a single-column main machine (111) and a horizontal worktable (12) single-station worktable are added, expanding the dual-station boring and milling machine (1) to an N-station boring and milling machine (8); the gantry robot (3) adopts a segmented beam structure and continues to extend according to the expansion of the N-station boring and milling machine (8), realizing the overall expansion of the large thin-walled shell intelligent boring and milling production line; the buffer material library (5) can be extended according to the gantry The length of the robot (3) is extended to N buffer warehouses to improve the storage capacity of the production line; the control system console (6) has the ability to manage the N-station boring and milling machine (8). When a station in the N-station boring and milling machine (8) fails, the control system isolates the station; the station will be in a disabled state, and the control system will not assign tasks to the station, but it will not affect the normal operation of other stations; when the station is repaired, the station will be released from the control system and the station will continue to participate in the production line operation tasks.

5. A method for operating a large thin-walled shell intelligent boring and milling machining production line as described in any one of claims 2-4, characterized in that, Specifically as follows: Step 1: Manual feeding and operation; The large thin-walled shell is manually hoisted and placed on the infeed / outfeed platform (2), and the relevant information of the large thin-walled shell is input through the control system console (6); Step 2: Large thin-walled shells enter the production line; After the information of the large thin-walled shell is entered into the control system console (6), the loading / unloading platform (2) carries the large thin-walled shell into the production line; the moving industrial camera (25) of the loading / unloading platform (2) moves to the designated position to verify the model of the large thin-walled shell according to the model of the large thin-walled shell obtained by the control system console (6); if the model of the large thin-walled shell is detected as abnormal, the loading / unloading platform (2) sends the large thin-walled shell out of the production line, and the control system console (6) alarms externally, and manual re-inspection and adjustment are required; if the model of the large thin-walled shell is detected as normal, it enters the production line. Step 3: Large thin-walled shells are put into storage; The main control system console (6) automatically allocates the storage location of the large thin-walled shell in the buffer warehouse (5) according to the current model of the large thin-walled shell and the inventory status of the buffer warehouse (5), and at the same time, it mobilizes the gantry robot (3) to transport the large thin-walled shell to the corresponding storage location; Step 4: The large thin-walled shell is transported to the processing location; After the production line starts, the control system operating console (6) automatically allocates the workstations of the large thin-walled shells to be processed according to the priority of the large thin-walled shells and the availability of the horizontal worktable (12) workstations, and dispatches the gantry robot (3) to transport the large thin-walled shells to the corresponding workstations, and cooperates with the dual-station boring and milling host (1) to install the large thin-walled shells on the hydraulic self-centering chuck (124) and hydraulic center frame (123); Step 5: Automated boring and milling of large thin-walled shells; After the large thin-walled shell is loaded onto the horizontal worktable (12), the control system operating table (6) automatically calls the machining program in the dual-station boring and milling host (1) according to the model of the large thin-walled shell to complete the automated boring and milling machining of the large thin-walled shell; Step 6: Large thin-walled shells are unloaded and transported to the cleaning machine; After the large thin-walled shell is processed, the control system console (6) schedules the gantry robot (3) to transport the large thin-walled shell to the horizontal workbench (12) based on the current idle status of the cleaning machine (4), and tilts the large thin-walled shell to pour out the residual cutting fluid inside; then the large thin-walled shell is transported to the cleaning machine (4). Step 7: Cleaning of large thin-walled shells; According to the model of the large thin-walled shell, the cleaning machine (4) moves the cleaning water gun (43) to the corresponding cleaning position and starts the cleaning and blowing operation of the large thin-walled shell; Step 8: Large thin-walled shell finished products are put into storage; After the large thin-walled shell is cleaned, it is transported to the buffer warehouse (5) by a gantry robot (3). Step 9: Large thin-walled shell finished product exits the production line; After all the large thin-walled shells in the work order have been processed, the corresponding work order is selected through the control system console (6), and the gantry robot (3) is dispatched to transport the large thin-walled shells to the loading and unloading platform (2); the loading and unloading platform (2) transports the large thin-walled shells to the periphery of the production line, and the large thin-walled shells are lifted away by manual labor.

Images