Aero-engine blade grinding unit and automatic production line

Abstract

The embodiment of the utility model provides an aero-engine blade grinding unit and an automatic production line, and relates to the technical field of numerical control machine tools. The three-dimensional coordinate measuring equipment is in communication connection with the grinding unit production management and control system, and the three-dimensional coordinate measuring equipment is arranged at the position of the feeding port and used for conducting coordinate detection on the to-be-machined blade input from the feeding port and determining the blade type of the to-be-machined blade according to a coordinate detection result; the multi-station grinding machine comprises a plurality of machining stations used for conducting grinding machining on the to-be-machined blades of the different types. The industrial robot is arranged on one side of the three-dimensional coordinate measuring equipment, is in communication connection with the grinding unit production management and control system and is used for conveying the to-be-machined blade to a target machining position according to the blade type of the to-be-machined blade; wherein the multi-station grinding machine starts the corresponding grinding head mechanism at the target machining station to grind the to-be-machined blade.

Description

Technical Field

[0001] The present application relates to the technical field of numerically controlled machine tools, and in particular to an aircraft engine blade grinding unit and an automated production line. Background Art

[0002] Five-axis linkage means that there are at least five coordinate axes (three linear coordinates and two rotational coordinates) on a machine tool, and they can be coordinated and processed at the same time under the control of the computer numerical control (CNC) system. Five-axis linkage CNC machine tools are high-tech and high-precision machine tools specially used for processing complex curved surfaces.

[0003] Currently, the five-axis linkage machine tool uses a controlled spindle to achieve the feeding of the X-axis, Y-axis, Z-axis, and B-axis, with high processing accuracy. However, this type of CNC machine tool has poor scalability and the production layout is easily restricted, which affects its performance. Utility Model Content

[0004] The present application provides an aircraft engine blade grinding unit and a grinding automation production line that can solve the problems of poor scalability and easily restricted production layout.

[0005] In a first aspect of an embodiment of the present application, there is provided an aircraft engine blade grinding unit, comprising:

[0006] Grinding unit production control system;

[0007] A three-dimensional coordinate measuring device is connected to the grinding unit production control system for communication. The three-dimensional coordinate measuring device is arranged at the loading port and is used to perform coordinate detection on the blade to be processed input from the loading port, and to determine the blade type of the blade to be processed according to the coordinate detection result;

[0008] A multi-station grinding machine, comprising a plurality of processing stations for grinding different types of blades to be processed;

[0009] An industrial robot is arranged on one side of the three-dimensional coordinate measuring device, the industrial robot is in communication connection with the grinding unit production control system, and is used for transporting the blade to be processed to a target processing position according to the blade type of the blade to be processed;

[0010] Wherein, the multi-station grinder starts the corresponding grinding head mechanism at the target processing position to grind the blade to be processed.

[0011] According to a second aspect of an embodiment of the present application, there is provided an automated production line for grinding aircraft engine blades, comprising a plurality of groups of aircraft engine blade grinding units as described in any embodiment of the present application.

[0012] The aircraft engine blade grinding unit provided in the above embodiment is designed and laid out in a professional integrated manner using a grinding unit production control system, a three-dimensional coordinate measuring device, a multi-station grinder and an industrial robot. It has good scalability and compatibility, and can easily achieve interconnection between multiple aircraft engine blade grinding units; the grinding unit production control system can communicate with the three-dimensional coordinate measuring device, the multi-station grinder and the industrial robot to achieve intelligent control. The multi-station grinder includes multiple processing stations for grinding different types of blades to be processed. In this way, by combining the multi-station grinder with online measurement technology, an intelligent grinding unit that can adapt to different types of blades and effectively improve the geometric accuracy and surface roughness of the blades is formed.

[0013] The automated production line for aircraft engine blade grinding provided by the above-mentioned embodiment belongs to the same concept as the corresponding aircraft engine blade grinding unit embodiment, and thus has at least the same technical effect as the corresponding aircraft engine blade grinding unit embodiment, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of a module of an aircraft engine blade grinding unit in one embodiment.

[0015] Figure 2 Schematic diagram of the layout of an aircraft engine blade grinding unit in one embodiment.

[0016] Figure 3 It is a system architecture diagram of an aircraft engine blade grinding unit in another embodiment.

[0017] Figure 4 The figure is a schematic diagram of the layout of an automated production line for grinding aircraft engine blades in one embodiment.

[0018] Component Symbols:

[0019] Grinding unit production control system 11, host computer 111, robot control cabinet 112, grinding machine control cabinet 113, three-dimensional coordinate measuring equipment 12, multi-station grinding machine 13, first type processing position 131, second type processing position 132, third type processing position 133, industrial robot 14, PLC system 15, auxiliary parts 151, loading port 16, pedestrian passage 17, enterprise production control system 20. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0021] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0022] In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments. It should be noted that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0023] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are only for the purpose of explanation in conjunction with the embodiments of the accompanying drawings and do not represent the only implementation method.

[0024] Aircraft engine blades are an important part of aircraft engines, usually including fan blades, compressor blades and turbine blades. These blades play the role of compressing and expanding air in the engine to convert the internal energy of the fuel into the kinetic energy of the aircraft. The production of aircraft engine blades is a highly complex and precise process. The blades need to work under various loads, such as centrifugal force, aerodynamic force generated by air and gas, and thermal stress, which are prone to high-cycle fatigue and thermal fatigue. In order to ensure work quality and efficiency, the material selection and production process of the blades have high requirements, especially for compressor blades. The complex torsion of the surface and the thin design increase the difficulty of manufacturing.

[0025] The known five-axis linkage machine tools can use the controlled spindle to realize the feeding of the X-axis, Y-axis, Z-axis, and B-axis to achieve higher processing accuracy. However, in one processing process, only blades of a certain size or model can be processed, and the grinding efficiency is low. It is difficult to be applicable to the processing problems of complex and diverse aircraft engine blades in actual applications. When blades of multiple sizes or models need to be processed, the corresponding processing parameters need to be set in sequence and processed separately. At this time, problems such as low pass rate and poor consistency are prone to occur.

[0026] In the design research aimed at solving the above-mentioned technical problems, the inventor of this application proposed an aircraft engine blade grinding unit 10 which is designed and arranged in a professional integrated manner using a grinding unit production control system 11, a three-dimensional coordinate measuring device 12, a multi-station grinder 13 and an industrial robot 14. Figure 1 , an aircraft engine blade grinding unit 10 provided in an embodiment of the present application, includes: a grinding unit production control system 11; a three-dimensional coordinate measuring device 12, which is communicated with the grinding unit production control system 11, and the three-dimensional coordinate measuring device 12 is arranged at the position of the loading port 16, and is used to perform coordinate detection on the blade to be processed input from the loading port 16, and determine the blade type of the blade to be processed according to the coordinate detection result; a multi-station grinder 13, including a plurality of processing positions for grinding different types of blades to be processed; an industrial robot 14, which is arranged on one side of the three-dimensional coordinate measuring device 12, and the industrial robot 14 is communicated with the grinding unit production control system 11, and is used to transport the blade to be processed to the target processing position according to the blade type of the blade to be processed; wherein the multi-station grinder 13 opens the corresponding grinding head mechanism at the target processing position to grind the blade to be processed.

[0027] The grinding unit production control system 11, as the control center of the aircraft engine blade grinding unit 10, can be an overall control system that uniformly controls and schedules various devices in the aircraft engine blade grinding unit 10, or it can include multiple physically and logically separated control systems. These physically and logically separated control systems can be communicated through communication protocols and server / client communication architectures, and cooperate with each other to perform coordinated control of multiple devices in the aircraft engine blade grinding unit 10.

[0028] The three-dimensional coordinate measuring device 12 refers to a measuring instrument used to measure and inspect the geometric dimensions and shape accuracy of various workpieces. In an optional example, the three-dimensional coordinate measuring device 12 uses a known device, including a detection sensor that moves on three coordinates respectively. The basic principle is to use the detection sensor (probe) to take points on the surface of the object to be measured, obtain the spatial coordinate values ​​of these points, and then obtain the geometric dimensions and shape of the workpiece through mathematical calculations.

[0029] The industrial robot 14 refers to an automated device that can perform various industrial operations, and can sense the working environment and precisely control the actions through components such as sensors, controllers, and actuators. In an optional specific example, the industrial robot 14 uses an ABB industrial robot 14, and is set to be able to perform various complex actions and operations, such as handling, assembly, welding, spraying, etc. according to preset programs and instructions.

[0030] The multi-station grinder 13 includes multiple processing positions for grinding different types of blades to be processed. Different processing positions can be provided with independently operated grinding heads to realize grinding of multiple blades to be processed or different types of blades to be processed respectively. In this embodiment, during the operation, the aircraft engine blade grinding unit 10 can firstly detect the coordinates of the loaded blades to be processed through the three-dimensional coordinate measuring device 12 set at the position of the loading port 16, and determine the geometric size and shape of the blades to be processed according to the coordinate detection results, so as to determine the blade type of the blade to be processed. The grinding unit production control system 11 can control the industrial robot 14 to pick up the blade to be processed to the target processing position matching the current blade type in the multi-station grinder 13 according to the blade type of the current blade to be processed determined by the three-dimensional coordinate measuring device 12, and perform grinding of the blade to be processed at the target processing position through the multi-station grinder 13.

[0031] The aircraft engine blade grinding unit 10 provided in the above embodiment adopts a grinding unit production control system 11, a three-dimensional coordinate measuring device 12, a multi-station grinder 13 and an industrial robot 14, which are designed and laid out in a professional integrated manner, and have good scalability and compatibility, and can easily realize the interconnection between multiple aircraft engine blade grinding units 10; the grinding unit production control system 11 can communicate with the three-dimensional coordinate measuring device 12, the multi-station grinder 13 and the industrial robot 14 to realize intelligent control, and the multi-station grinder 13 includes multiple processing positions for grinding different types of blades to be processed. In this way, the multi-station grinder 13 is combined with online measurement technology to form an intelligent grinding unit that can adapt to different types of blades and can effectively improve the geometric accuracy and surface roughness of the blades.

[0032] In some embodiments, please refer to Figure 2 In the aircraft engine blade grinding unit 10 provided in the embodiment of the present application, the processing positions include a first type of processing position 131, a second type of processing position 132 and a third type of processing position 133; the first type of processing position 131 is used for grinding and polishing of blade transfers and tenon edge plates; the second type of processing position 132 is used for grinding and polishing of blade profiles of different types of blades to be processed; the third type of processing position 133 is used to adjust the contact pressure between the grinding head and the workpiece. Here, different types of processing positions refer to the settings based on multiple process steps of the grinding process for aircraft engine blades. In the same type of processing position, one or more identical or different processing positions can be further set based on the processing requirements of aircraft engine blades of different blade types. In this way, the aircraft engine blade grinding unit 10 can also support the selection of different numbers of different types of processing positions according to actual application requirements to combine and complete the processing technology adapted to various blade processing requirements.

[0033] It should be noted that, in the aircraft engine blade grinding unit 10, the first type of processing position 131, the second type of processing position 132 and the third type of processing position 133 can be formed into a plurality of physically separated sub-devices, and the plurality of sub-devices respectively having the first type of processing position 131, the second type of processing position 132 and the third type of processing position 133 are arranged at intervals along the same circular arc trajectory, that is, the first type of processing position 131, the second type of processing position 132 and the third type of processing position 133 are arranged at intervals along the same circular arc trajectory, and a standardized unit is formed in an integrated manner, which is also more conducive to the arrangement of the industrial robot 14, so that the industrial robot 14 can pick up the blade to be processed to the corresponding target processing position.

[0034] Optionally, the second type of processing position 132 includes a processing position A for grinding and polishing the blade profile of a first size blade, and a processing position B for grinding and polishing the blade profile of a second size blade; processing position A includes a contact wheel and abrasive belt having a diameter and a width corresponding to the first size blade; processing position B includes a contact wheel and abrasive belt having a diameter and a width corresponding to the second size blade. In this embodiment, according to the grinding and polishing process requirements of aircraft engine blades, the second type of processing position 132 is designed to include processing positions A and processing positions B corresponding to different blade types. The first size blade refers to large and medium-sized blades, and the second size blade refers to small blades, so as to be compatible with the processing requirements of various types of aircraft engine blades.

[0035] Optionally, the first type of processing position 131 includes a nylon wheel. The third type of processing position 133 includes a servo motor and an auxiliary shaft adjustment device; the servo motor is used to control the auxiliary shaft adjustment device to adjust the displacement so as to adjust the contact pressure between the grinding head and the workpiece.

[0036] In the above embodiment, a belt grinding and polishing machine including four workstations is designed according to the grinding and polishing process of aircraft engine blades. Among them, the first type of processing position 131 includes processing position No. 1, which is equipped with a nylon wheel and is used for grinding and polishing of blade transfer and tenon edge plate. The second type of processing position 132 includes processing positions A and B, which are used for grinding and polishing of blade profiles. Among them, processing position A is equipped with a contact wheel and abrasive belt with a larger diameter and width, which is used for rough grinding of large and medium-sized blades. Processing position B is equipped with a contact wheel and abrasive belt with a smaller diameter and width, which is used for rough grinding of blades of the second size. The third type of processing position 133 includes processing position No. 4, on which an auxiliary shaft adjustment device is installed on the grinding head, which can accurately control the displacement through a servo motor to change the contact pressure between the grinding head and the workpiece to avoid burning. Through the processing of the corresponding blades by multiple processing positions, precise belt grinding and polishing are achieved for the leading and trailing edges and profiles of the blades, which can effectively improve the geometric accuracy and surface roughness of the blades.

[0037] Optionally, the industrial robot 14 is used to sequentially transport the blade to be processed to the first type processing position 131 for rough processing, the second type processing position 132 corresponding to the blade type of the blade to be processed for semi-finishing processing, and the third type processing position 133 for finishing processing. In this embodiment, three types of processing positions are set to correspond to the rough processing-semi-finishing processing-finishing processing of the blade to be processed, so that the multi-station grinder 13 can effectively improve the geometric accuracy and surface roughness of the blade according to the actual processing requirements.

[0038] In some embodiments, the grinding unit production control system 11 includes a host computer 111, a robot control cabinet 112 and a grinder control cabinet 113 that are communicatively connected to the host computer 111; the robot control cabinet 112 is used to control the industrial robot 14 to perform corresponding control actions; the grinder control cabinet 113 is used to control the multi-station grinder 13 to perform corresponding grinding processing procedures. In this embodiment, the grinding unit production control system 11 includes a host computer 111, a robot control cabinet 112 and a grinder control cabinet 113 that can be physically separated. On the one hand, the aircraft engine blade grinding unit 10 can be formed in an integrated manner more flexibly, reducing the layout space occupied by the aircraft engine blade grinding unit 10 as a whole; on the other hand, the control logic of different devices can be designed separately to reduce the control difficulty.

[0039] In some embodiments, please refer to Figure 3, the grinding unit production control system 11 and the multi-station grinder 13 are connected in communication based on the TCP / IP communication protocol; the grinding unit production control system 11 and the three-dimensional coordinate measuring device 12 are connected in communication through the client and the server using Web service. Among the main components of the aircraft engine blade grinding unit 10, the multi-station grinder 13 and the three-dimensional coordinate measuring device 12 are connected in communication with the grinding unit production control system 11 using the TCP / IP communication protocol and Web service, and the industrial Internet thinking is used to realize production control. The grinding unit production control system 11 controls each device in the aircraft engine blade grinding unit 10 based on the C / S architecture and the MVC design pattern. Optionally, the grinding unit production control system 11 can also establish a communication connection with the existing enterprise production control system 20, and perform logical integration with the enterprise production control system 20 to realize the automated processing management of aircraft engine blades. In an optional example, the enterprise production control system 20 can realize remote interaction of equipment through the Webservice protocol, and uniformly control the aircraft engine blade grinding unit 10, so that production tasks can be executed according to the production plan. It should be noted that the aircraft engine blade grinding unit 10 provided in the embodiment of the present application can be a standardized unit formed in an integrated manner, and the enterprise production control system 20 can be a unified control of multiple aircraft engine blade grinding units 10, and the interconnection between the multiple aircraft engine blade grinding units 10 can work together to realize more complex production plans.

[0040] Optionally, the aircraft engine blade grinding unit 10 also includes a PLC system 15 and auxiliary parts 151 controlled by the PLC system 15; the auxiliary parts 151 include a chuck, a claw, a light curtain, a sensor and a safety door. Among them, the aircraft engine blade grinding unit 10 is mainly integrated with a multi-station grinder 13, a three-dimensional coordinate measuring device 12, and an industrial robot 14. The production control and grinding of the aircraft engine blade are mainly achieved by controlling the multi-station grinder 13, the three-dimensional coordinate measuring device 12, and the industrial robot 14 through the grinding unit production control system 11. In this embodiment, by further assembling the PLC system 15, some auxiliary parts 151 that need to be added can be introduced, and the PLC system 15 is used to complete the automatic control of the added auxiliary parts 151. In this way, the aircraft engine blade grinding unit 10 can be designed and laid out more flexibly in a professional integrated manner, and has scalability and compatibility.

[0041] See also Figure 4On the other hand, the present application also provides an automated production line for aircraft engine blade grinding, including a plurality of aircraft engine blade grinding units 10. Each aircraft engine blade grinding unit 10 can be laid out and combined as a standardized unit. In an optional example, a plurality of aircraft engine blade grinding units 10 are symmetrically deployed on both sides of the same pedestrian passage 17, and the grinding unit production control system 11 of the plurality of aircraft engine blade grinding units 10 is uniformly placed on one side close to the pedestrian passage 17, so that the staff can conveniently control and view the working status of the aircraft engine blade grinding units 10 located on both sides of the same pedestrian passage 17 at the same time. In each aircraft engine blade grinding unit 10, the position of the loading port 16 can transport the aircraft engine blade to be processed to the three-dimensional coordinate measuring device 12 through the loading port trays 161 arranged in sequence, so as to meet the digital intelligent production requirements of aircraft engine blades.

[0042] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0043] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An aero-engine blade grinding unit, characterized in that: include: Grinding unit production control system; A three-dimensional coordinate measuring device is connected to the grinding unit production control system for communication. The three-dimensional coordinate measuring device is arranged at the loading port and is used to perform coordinate detection on the blade to be processed input from the loading port, and to determine the blade type of the blade to be processed according to the coordinate detection result; A multi-station grinder, comprising a plurality of processing stations for grinding different types of blades to be processed, wherein the multi-station grinder is communicatively connected to the grinding unit production control system; An industrial robot is arranged on one side of the three-dimensional coordinate measuring device, the industrial robot is in communication connection with the grinding unit production control system, and is used for transporting the blade to be processed to a target processing position according to the blade type of the blade to be processed; Also includes a PLC system and auxiliary components controlled by the PLC system; Wherein, the multi-station grinder starts the corresponding grinding head mechanism at the target processing position to grind the blade to be processed; Among them, the grinding unit production management and control system includes a host computer, a robot control cabinet and a grinding machine control cabinet which are communicatively connected to the host computer; the robot control cabinet is used to control the industrial robot to perform corresponding control actions; the grinding machine control cabinet is used to control the multi-station grinder to perform corresponding grinding processing processes.

2. The aeroengine blade grinding unit according to claim 1, characterized in that: The processing positions include a first type of processing position, a second type of processing position and a third type of processing position; The first type of processing position is used for grinding and polishing of blade transfer and tenon edge plate; The second type of processing position is used for grinding and polishing the blade profiles of different types of blades to be processed; The third type of machining position is used to adjust the contact pressure between the grinding head and the workpiece.

3. The aeroengine blade grinding unit according to claim 2, characterized in that: The second type of processing positions include a processing position A for grinding and polishing the blade profile of a first size blade, and a processing position B for grinding and polishing the blade profile of a second size blade; The processing station A includes a contact wheel and an abrasive belt with a diameter and a width corresponding to the blade of the first size; The machining station B comprises a contact wheel and an abrasive belt having a diameter and a width corresponding to the blade of the second size.

4. The aeroengine blade grinding unit according to claim 2, characterized in that: The first type of processing position includes a nylon wheel.

5. The aeroengine blade grinding unit according to claim 2, characterized in that: The third type of machining position includes a servo motor and an auxiliary shaft adjustment device; the servo motor is used to control the auxiliary shaft adjustment device to adjust the displacement so as to adjust the contact pressure between the grinding head and the workpiece.

6. The aeroengine blade grinding unit according to claim 2, characterized in that: The industrial robot is used to sequentially transport the blades to be processed to the first type processing position for rough processing, the second type processing position corresponding to the blade type of the blades to be processed for semi-finishing processing, and the third type processing position for finishing processing.

7. The aero-engine blade grinding unit according to claim 1, characterized in that: The grinding unit production control system and the multi-station grinding machine are connected in communication based on the TCP / IP communication protocol; the grinding unit production control system and the three-dimensional coordinate measuring device are connected in communication in the form of a client and a server using Web service.

8. The aero-engine blade grinding unit according to claim 1, characterized in that: The auxiliary parts include a chuck, a claw, a light curtain, a sensor and a safety door.

9. An automated production line for grinding aircraft engine blades, characterized in that: The invention comprises a plurality of groups of aero-engine blade grinding units as claimed in any one of claims 1 to 8.

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