A flexible assembly system for an aeroengine

Abstract

The application discloses an aero-engine flexible assembly system. The application is composed of a centering and measuring unit installed on a system base, a part posture adjusting and centering unit, a compressor rotor positioning tool, a large nut blind cavity tightening unit and a multi-degree-of-freedom assembly frame. The multi-degree-of-freedom assembly frame is used for assembling engine parts and connecting an operation platform. The centering and measuring unit is used for automatic measurement of engine posture. The part posture adjusting and centering unit is used for grabbing and butt joint assembling of engine parts to be installed. The large nut blind cavity tightening unit is used for automatic detection and tightening operation of engine low vortex long shaft large nut blind cavity. The compressor rotor positioning tool is used for positioning of engine compressor rotor parts. The application is suitable for assembling, part and general assembly on a shared assembly platform to complete all assembly, and has prominent flexible assembly characteristics. The application is especially suitable for new machine development stage, has low tool manufacturing cost, small factory building use area and greatly reduced resource waste.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of an aero-engine automatic assembly system, and particularly relates to a flexible aero-engine assembly system. BACKGROUND

[0002] Under the current complex domestic and foreign tense situation, China accelerates the investment in the development process of high-end aero-engine equipment, and a large number of new types and specifications are developed. Aero-engine assembly is one of the most important links in the engine manufacturing process, and the assembly process involves a large number of parts and complex coordination parts. The assembly technology level and assembly quality directly affect the working condition characteristics of the engine, and directly determine the reliability, life and main performance parameters of the engine. At present, the traditional assembly tooling is used to complete the engine component or total assembly installation operation in the main engine factory of each aero-engine, the assembly efficiency is low, the product assembly quality is poor, especially in the new machine development stage, the repeated investment of supporting tooling is large, but the utilization rate is extremely low, and the factory building occupies a large area, causing a waste of many social resources, which seriously restricts the short cycle, high reliability and long life comprehensive delivery requirements of the contemporary aircraft main engine factory on the engine.

[0003] At present, the domestic aero-engine assembly manufacturing technology level is obviously lagging behind the related industries such as automobiles and aircraft, which have introduced a large number of digital and intelligent production lines and equipment, especially in the aspect of assembly technology. The traditional manufacturing methods such as simple mechanical welding assembly frame and manual measurement and visual observation are still dominant. In the key technical field of high-end aero-engine equipment, the European and American countries invest a large amount of money to develop high-efficiency component automatic docking technology and robot automatic detection technology, which significantly shortens the delivery cycle of the engine, but implements a strict technical blockade and embargo strategy on China. SUMMARY

[0004] In order to improve the overall level of China's aero-engine high-end equipment, make up for the short board of manufacturing process equipment, combined with the engine development situation in China, in order to solve the outstanding problems of repeated investment of tooling, factory building and personnel, reduce resource cost, and at the same time greatly improve the utilization rate of equipment and the automation and intelligent technology level of assembly, research new technologies, new methods and new equipment suitable for the process characteristics of China's engine development, the purpose of the application is to provide a flexible aero-engine assembly system, which embodies the characteristics of automation, digitization, intelligence and flexibility, is compatible with the production requirements of new machine development and small batch assembly of multiple types, and can meet the assembly work of components, parts and whole machines on the platform of the application, has the characteristics of high precision, high efficiency and good safety, reduces the labor intensity of operators, and is the development trend of the transformation from traditional fixed assembly mode to flexible and automatic assembly technology in the field of aero-engine assembly technology. It has a wide application prospect in the field of aero-engine digital and intelligent assembly.

[0005] The technical solutions of the present invention are as follows:

[0006] The invention comprises a centering measurement unit, a component attitude adjustment centering unit, a system base, a compressor rotor positioning tool, a large nut blind cavity tightening unit and a multi-degree-of-freedom assembly stand;

[0007] A multi-degree-of-freedom assembly rack is fixedly installed in the middle of the system base, and a component attitude adjustment and centering unit and a centering measurement unit are installed on the system base on one side of the multi-degree-of-freedom assembly rack. The centering measurement unit is arranged above the component attitude adjustment and centering unit, and both the component attitude adjustment and centering unit and the centering measurement unit move along the X-direction track of the system base; a large nut blind cavity tightening unit is installed on the system base on one side of the multi-degree-of-freedom assembly rack, and the large nut blind cavity tightening unit moves along the Y-direction track of the system base; a compressor rotor positioning tool is installed on the system base between the component attitude adjustment and centering unit and the large nut blind cavity tightening unit, and the compressor rotor positioning tool moves along the X-direction track of the system base.

[0008] The centering measurement unit includes a servo electric cylinder, a guide assembly, a mounting bracket, a rotary cylinder, a first mounting plate, a first industrial camera, a first connecting plate, a measuring assembly, a first displacement sensor and a second displacement sensor; the bottom of the mounting bracket is connected to the system base, and the mounting bracket moves along the X-direction track of the system base; the upper part of the mounting bracket is installed with a servo electric cylinder and multiple guide assemblies; the output shaft of the servo electric cylinder passes downward through the mounting bracket and is connected to the first connecting plate; the lower ends of the multiple guide assemblies also pass downward through the mounting bracket and are connected to the first connecting plate, so that the drive of the servo electric cylinder drives the first connecting plate to move up and down in the mounting bracket; the first mounting plate is installed in the first connecting plate through the rotary cylinder, the first industrial camera is installed in the middle of the first mounting plate, multiple measuring assemblies are installed on the side of the first mounting plate, and the first displacement sensor and the second displacement sensor are also installed on the side of the first mounting plate.

[0009] The multiple measuring components have the same structure and all include an electric module and a first laser sensor. The first laser sensor is installed on the side of the first mounting plate through the electric module.

[0010] The component posture adjustment and centering unit comprises a B1 axis drive assembly, a Z2 axis servo drive assembly, a Y1 axis slide, an X2 axis slide, a Y1 axis linear guide (205), a C2 axis drive assembly, a Z2 axis lifting slide, a Z2 axis linear guide, a safety latch mechanism, a quick-change fixture, a YZ plane floating slide, an A1 axis mounting seat, a B1 axis mounting seat, a C2 axis mounting seat, an A1 axis drive assembly, a docking force control sensor, a floating slide positioning cylinder, a part positioning block, a part positioning mounting seat, a Y1 axis servo drive assembly and a YZ plane floating slide;

[0011] The X2 axis sliding table is connected with the system base, and the X2 axis sliding table moves along the X direction track of the system base; the Y1 axis sliding table is installed on the X2 axis sliding table through the Y1 axis linear guide rail and the Y1 axis servo driving assembly; the Y1 axis servo driving assembly drives the Y1 axis sliding table to move along the Y1 axis linear guide rail on the X2 axis sliding table; the Z2 axis lifting sliding table is installed in the Y1 axis sliding table through the Z2 axis servo driving assembly and the Z2 axis linear guide rail; the Z2 axis servo driving assembly drives the Z2 axis lifting sliding table to move along the Z2 axis linear guide rail in the Y1 axis sliding table; the C2 axis driving assembly is installed in the Z2 axis lifting sliding table; the output end of the C2 axis driving assembly is connected with the C2 axis mounting seat; the C2 axis driving assembly drives the C2 axis mounting seat to rotate around the Z axis on the Z2 axis lifting sliding table; the B1 axis mounting seat is installed in the C2 axis mounting seat through the B1 axis driving assembly; the B1 axis driving assembly drives the B1 axis mounting seat to rotate around the Y axis in the C2 axis mounting seat; the A1 axis mounting seat is installed in the B1 axis mounting seat through the A1 axis driving assembly; the A1 axis driving assembly drives the A1 axis mounting seat to rotate around the X axis in the B1 axis mounting seat; the YZ plane floating sliding table is installed in the A1 axis mounting seat through the YZ plane floating sliding rail and the floating sliding table positioning cylinder; the floating sliding table positioning cylinder drives the YZ plane floating sliding table to move along the YZ plane floating sliding rail in the A1 axis mounting seat; the positioning mounting seat is installed in the YZ plane floating sliding table through the butt joint force control sensor; the positioning mounting seat is provided with a plurality of part positioning blocks close to the side surface of the multi-degree-of-freedom assembly frame; the two sides of the positioning mounting seat are further provided with safety bolt mechanisms; the quick-change tool is fixedly installed in the positioning mounting seat through the part positioning blocks and the safety bolt mechanisms.

[0012] The system base comprises a base body, an X1 axis linear guide rail, an X2 axis driving assembly, an X2 axis linear guide rail, an X3 axis driving assembly, a Y2 axis linear guide rail, a Y2 axis driving assembly and an X1 axis driving assembly;

[0013] The base body is arranged on the ground; the X1 axis linear guide rail, the X2 axis driving assembly, the X2 axis linear guide rail, the X3 axis driving assembly, the Y2 axis linear guide rail, the Y2 axis driving assembly and the X1 axis driving assembly are installed on the base body; the X1 axis linear guide rail is parallel to and spaced apart from the X2 axis linear guide rail; the centering measurement unit is movably installed on the base body through the X1 axis linear guide rail and the X1 axis driving assembly; the part attitude adjustment centering unit is movably installed on the base body through the X2 axis driving assembly and the X2 axis linear guide rail; the air compressor rotor positioning tool is movably installed on the base body through the X3 axis driving assembly and the X2 axis linear guide rail; and the large nut blind cavity tightening unit is movably installed on the base body through the Y2 axis linear guide rail and the Y2 axis driving assembly.

[0014] The large nut blind cavity tightening unit includes a Y2-axis slide, a C4-axis turntable bearing, an X4-axis mounting seat, a large nut tightening movable guide rail, a large nut tightening component drive, a center detection component drive, a center detection component movable guide rail, a large nut tightening torque drive motor, a large nut tightening component mounting seat, a center detection component mounting seat, a sensor mounting plate, a second industrial camera, a second laser sensor, a special sleeve for large nut tightening, and a C4-axis drive assembly;

[0015] The Y2-axis slide is movably mounted on the system base, and the C4-axis turntable bearing is rotatably mounted on the Y2-axis slide through the C4-axis drive assembly. The drive of the C4-axis drive assembly drives the C4-axis turntable bearing to rotate around the Z axis, and the C4-axis turntable bearing is installed with an X4-axis mounting seat; the center detection component mounting seat is mounted on the X4-axis mounting seat through the center detection component drive and the center detection component moving guide rail. The drive of the center detection component drive drives the center detection component mounting seat to move along the X-direction track on the X4-axis mounting seat along the center detection component moving guide rail; the center detection component mounting seat is fixedly mounted with a sensor mounting plate near the side of the multi-degree-of-freedom assembly frame, and the middle of the sensor mounting plate A second industrial camera is installed, and multiple second laser sensors are installed on the side of the sensor mounting plate; the large nut tightening component mounting seat is installed on the X4 axis mounting seat through the large nut tightening moving guide rail and the large nut tightening component driver, the large nut tightening moving guide rail and the center detection component moving guide rail are parallel to the X axis and arranged at intervals, and the large nut tightening component driver drives the large nut tightening component mounting seat to move along the large nut tightening moving guide rail on the X4 axis mounting seat along the X-direction track; a large nut tightening torque drive motor is fixedly installed on the side of the large nut tightening component mounting seat close to the multi-degree-of-freedom assembly frame, and a special sleeve for large nut tightening is connected to the output shaft of the large nut tightening torque drive motor.

[0016] The multi-freedom assembly rack is an assembly rack that can be lifted and lowered along the Z direction, rotated along the X direction, and flipped along the Y direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The layout of the assembly system of the present invention can be used to complete the entire assembly of components, parts and final assembly on a common assembly platform through quick-change tooling, with outstanding flexible assembly features;

[0019] 2) The present invention is suitable for engine development and small-batch assembly production, especially in the new engine development stage, with low tooling manufacturing costs and small factory floor space, thus significantly reducing resource waste;

[0020] 3) The invention is configured with automatic centering measurement technology, part pose adjustment centering technology, large nut blind cavity automatic tightening technology and automated multi-degree-of-freedom assembly frame, etc. The degree of automation, digitization and intelligence is high, and the highly integrated system technology is advanced;

[0021] 4) The invention uses a large number of sensor technology, software technology, computer control technology, visual detection technology and system integration technology, which can significantly improve the assembly quality and assembly efficiency, and reduce the labor intensity of technical workers. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is an axial view of the flexible assembly system of an aero-engine;

[0023] Figure 2 is a front view of the flexible assembly system of an aero-engine;

[0024] Figure 3 is a top view of the flexible assembly system of an aero-engine;

[0025] Figure 4 is a centering measurement unit of the flexible assembly system of an aero-engine;

[0026] Figure 5 is an axial view (front) of the part pose adjustment centering unit of the flexible assembly system of an aero-engine;

[0027] Figure 6 is an axial view (back) of the part pose adjustment centering unit of the flexible assembly system of an aero-engine;

[0028] Figure 7 is a top view of the part pose adjustment centering unit of the flexible assembly system of an aero-engine;

[0029] Figure 8 is an axial view of the system base of the flexible assembly system of an aero-engine;

[0030] Figure 9 is an axial view (back) of the large nut blind cavity tightening unit of the flexible assembly system of an aero-engine;

[0031] Figure 10 is an axial view (front) of the large nut blind cavity tightening unit of the flexible assembly system of an aero-engine;

[0032] Figure 11 is a front view of the large nut blind cavity tightening unit of the flexible assembly system of an aero-engine;

[0033] In the figure: centering detection unit 1, component attitude alignment system 2, system base 3, compressor rotor positioning tool 4, large nut blind cavity tightening system 5, multi-degree-of-freedom assembly frame 6, servo cylinder 101, guide assembly 102, mounting bracket 103, rotary cylinder 104, electric module 105, first laser sensor 106, first mounting plate 107, first industrial camera 108, first displacement sensor 109, second displacement sensor 110, B1 axis drive assembly 201, Z2 axis servo drive assembly 202, Y1 axis sliding table 203, X2 axis sliding table 204, Y1 axis linear guide rail 205, C2 axis drive assembly 206, Z2 axis lifting sliding table 207, Z2 axis linear guide rail 208, safety bolt mechanism 209, quick-change tool 210, YZ plane floating sliding table 211, A1 axis mounting seat 212, B1 axis mounting seat 213, C2 axis mounting seat 214, A1 axis drive assembly 215, butt joint force control sensor 216, floating sliding table positioning cylinder 217, part positioning block 218, part positioning mounting seat 219, Y1 axis servo drive assembly 220, YZ plane floating guide rail 221, base body 301, horizontal adjustment pad iron 302, X1 axis linear guide rail 303, X2 axis drive assembly 304, X2 axis linear guide rail 305, X3 axis drive assembly 306, Y2 axis linear guide rail 307, Y2 axis drive assembly 308, X1 axis drive assembly 309, Y2 axis sliding table 501, C4 axis turntable bearing 502, X4 axis mounting seat 503, large nut tightening moving guide rail 504, large nut tightening assembly drive 505, center detection assembly drive 506, center detection assembly moving guide rail 507, large nut tightening torque drive motor 508, large nut tightening assembly mounting seat 509, center detection assembly mounting seat 510, sensor mounting plate 511, second industrial camera 512, second laser sensor 513, large nut tightening special sleeve 514, C4 axis drive assembly 515. DETAILED DESCRIPTION

[0034] The application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0035] As shown in Figure 1 , Figure 2 and Figure 3 , the application includes a centering measurement unit 1, a control cabinet, an operation platform, a component attitude alignment unit 2, a system base 3, a compressor rotor positioning tool 4, a large nut blind cavity tightening unit 5, and a multi-degree-of-freedom assembly frame 6, etc.

[0036] A multi-degree-of-freedom assembly rack 6 is fixedly installed in the middle of the system base 3. The multi-degree-of-freedom assembly rack 6 is used to assemble various engine components and connect the operating platform. The operating platform is connected to the control cabinet. A component attitude adjustment and centering unit 2 and a centering measurement unit 1 are installed on the system base 3 on one side of the multi-degree-of-freedom assembly rack 6. The centering measurement unit 1 is arranged above the component attitude adjustment and centering unit 2. The component attitude adjustment and centering unit 2 and the centering measurement unit 1 both move along the X-direction track of the system base 3, but their guide rails are different, that is, the component attitude adjustment and centering unit 2 and the centering measurement unit 1 move independently and do not affect each other. The centering measurement unit 1 is used for automatic measurement of the engine attitude, and the component attitude adjustment and centering unit 2 is used for grasping, centering and assembling the engine components to be installed; a large nut blind cavity tightening unit 5 is installed on the system base 3 on one side of the multi-degree-of-freedom assembly frame 6, and the large nut blind cavity tightening unit 5 moves along the Y-direction track of the system base 3. The large nut blind cavity tightening unit 5 is used for automatic detection and tightening operations of the large nut blind cavity of the engine low-vortex long shaft; a compressor rotor positioning tool 4 is installed on the system base 3 between the component attitude adjustment and centering unit 2 and the large nut blind cavity tightening unit 5, and the compressor rotor positioning tool 4 moves along the X-direction track of the system base 3. The compressor rotor positioning tool 4 is used for positioning the engine compressor rotor components.

[0037] like Figure 4 As shown, the centering measurement unit 1 includes a servo cylinder 101, a guide assembly 102, a mounting bracket 103, a rotary cylinder 104, a first mounting plate 107, a first industrial camera 108, a first connecting plate, a measuring assembly, a first displacement sensor 109 and a second displacement sensor 110;

[0038] The bottom of the mounting bracket 103 is connected to the X1-axis linear guide 303 of the system base 3. Driven by the X1-axis drive assembly 304, the mounting bracket 103 moves along the X1-axis linear guide 303 (i.e., the X-direction track) of the system base 3. A servo electric cylinder 101 and multiple guide assemblies 102 are installed on the upper part of the mounting bracket 103. The output shaft of the servo electric cylinder 101 passes downward through the mounting bracket 103 and is connected to the first connecting plate. The lower ends of the multiple guide assemblies 102 also pass downward through the mounting bracket 103 and are connected to the first connecting plate, so that the drive of the servo electric cylinder 101 drives the first connecting plate to move up and down in the mounting bracket 103; the first mounting plate 107 is installed in the first connecting plate by the rotary cylinder 104, realizing a 180° measurement direction change of the sensor on the first mounting plate 107, adapting to the engine mounting base and the measurement position accessibility of the mounted component; a first industrial camera 108 is installed in the middle of the first mounting plate 107, and the first industrial camera 108 is used for visual detection of the center position of the engine casing. A plurality of measuring components arranged at intervals are installed on the side of the first mounting plate 107. A first displacement sensor 109 and a second displacement sensor 110 are also installed on the side of the first mounting plate 107, which are respectively used to realize the upper busbar and side busbar attitude measurement of the engine low-vortex long axis.

[0039] Multiple measuring components have the same structure, all including an electric module 105 and a first laser sensor 106. The first laser sensor 106 is installed on the side of the first mounting plate 107 through the electric module 105. The first laser sensor 106 can adapt to the changes in the diameter of the measurement position of the edge of the engine casing through the movement of the slider in the electric module 105.

[0040] like Figure 5 、 Figure 6 and Figure 7 As shown, the component posture adjustment and centering unit 2 includes a B1 axis drive assembly 201, a Z2 axis servo drive assembly 202, a Y1 axis slide 203, an X2 axis slide 204, a Y1 axis linear guide (205), a C2 axis drive assembly 206, a Z2 axis lifting slide 207, a Z2 axis linear guide 208, a safety latch mechanism 209, a quick-change tool 210, a YZ plane floating slide 211, an A1 axis mounting seat 212, a B1 axis mounting seat 213, a C2 axis mounting seat 214, an A1 axis drive assembly 215, a docking force control sensor 216, a floating slide positioning cylinder 217, a part positioning block 218, a part positioning mounting seat 219, a Y1 axis servo drive assembly 220 and a YZ plane floating slide 221;

[0041] The X2-axis slide 204 is connected to the X2-axis linear guide 305 of the system base 3 and is driven by the X2-axis drive assembly 309 to realize the movement of the X2-axis slide 204 along the X2-axis linear guide 305 (i.e., the X-direction track) of the system base 3; the Y1-axis slide 203 is installed on the X2-axis slide 204 through the Y1-axis linear guide 205 and the Y1-axis servo drive assembly 220. The Y1-axis linear guide 205 and the Y1-axis servo drive assembly 220 are both installed on the Y1-axis slide 203 and the Y1-axis linear guide 205 and the Y1-axis servo drive assembly 220 are arranged in parallel and at intervals. The drive of the Y1-axis servo drive assembly 220 drives the Y1-axis slide 203 along the Y1-axis linear guide 205 It moves on the X2-axis slide 204 to achieve movement in the Y direction; the Z2-axis lifting slide 207 is installed in the Y1-axis slide 203 through the Z2-axis servo drive component 202 and the Z2-axis linear guide 208. The Z2-axis lifting slide 207 and the Y1-axis slide 203 are both composed of a main mounting plate and side mounting plates fixed on both sides of the main mounting plate. The Z2-axis linear guide 208 is fixedly installed on the inner side of the two side mounting plates of the Y1-axis slide 203, and the Z2-axis linear guide 208 is fixedly installed on the outer side of the two side mounting plates. The two side mounting plates of the Z2-axis lifting slide 207 are respectively connected to the corresponding Z2-axis linear guide 208, so that the Z2-axis lifting slide 207 is set in the Y1-axis slide 203. The drive of the Z2-axis servo drive component 202 drives the Z2-axis lifting slide 207 to move along the Z2-axis linear guide 208 in the Y1-axis slide 203, moving in the Z direction;

[0042] The Z2-axis lifting slide 207 is equipped with a C2-axis driving assembly 206. The output end of the C2-axis driving assembly 206 is connected to the C2-axis mounting seat 214. The driving of the C2-axis driving assembly 206 drives the C2-axis mounting seat 214 to rotate around the Z-axis on the Z2-axis lifting slide 207, thereby realizing the rotational motion around the Z-axis. The B1-axis mounting seat 213 is installed in the C2-axis mounting seat 214 through the B1-axis driving assembly 201. The driving of the B1-axis driving assembly 201 drives the B The A1-axis mounting seat 213 rotates around the Y-axis in the C2-axis mounting seat 214 to achieve rotational motion around the Y-axis; the A1-axis mounting seat 212 is mounted on the side of the B1-axis mounting seat 213 close to the multi-degree-of-freedom assembly frame 6 through the A1-axis driving component 215. The A1-axis driving component 215 drives the A1-axis mounting seat 212 to rotate around the X-axis in the B1-axis mounting seat 213 to achieve rotational motion around the X-axis, thereby forming a six-degree-of-freedom attitude adjustment device for the engine component to be installed;

[0043] YZ plane floating slide 211 is installed in the side of A1 shaft mounting seat 212 close to multi-degree-of-freedom assembly frame 6 through YZ plane floating slide rail 221 and floating slide positioning cylinder 217, the driving of floating slide positioning cylinder 217 drives YZ plane floating slide 211 to move in A1 shaft mounting seat 212 along YZ plane floating slide rail 221, and initial position correction positioning of YZ plane floating slide 211 is realized by floating slide positioning cylinder 217;Positioning mounting seat 219 is installed in the side of YZ plane floating slide 211 close to multi-degree-of-freedom assembly frame 6 through butt joint force control sensor 216, butt joint force control sensor 216 is used for monitoring interference in the engine assembly butt joint process;A plurality of part positioning blocks 218 are arranged in the side of positioning mounting seat 219 close to multi-degree-of-freedom assembly frame 6, safety bolt mechanism 209 is also arranged on the two sides of positioning mounting seat 219, quick-change tooling 210 is fixedly installed in the side of positioning mounting seat 219 through part positioning block 218 and safety bolt mechanism 209.For different components to be installed of the engine, different quick-change tooling 210 connecting plates are designed, four pins on quick-change tooling 210 are matched with four part positioning blocks 218 on part positioning mounting seat 219 quickly, and the components of multiple varieties and variable sizes are adapted, so that the common platform and flexible assembly are met.The safety bolt mechanism 209 arranged on the two sides of part positioning mounting seat 219 locks quick-change tooling 210, so that the product positioning is safe and reliable.

[0044] As shown in Figure 8 The system base 3 comprises a base body 301, a horizontal adjustment pad iron 302, an X1-axis linear guide rail 303, an X2-axis driving assembly 304, an X2-axis linear guide rail 305, an X3-axis driving assembly 306, a Y2-axis linear guide rail 307, a Y2-axis driving assembly 308, and an X1-axis driving assembly 309.

[0045] The base body 301 is set on the ground, and a horizontal adjustment shim 302 is also provided between the base body 301 and the ground. The base body 301 is installed with an X1-axis linear guide 303, an X2-axis drive assembly 304, an X2-axis linear guide 305, an X3-axis drive assembly 306, a Y2-axis linear guide 307, a Y2-axis drive assembly 308, and an X1-axis drive assembly 309. Among them, the X1-axis linear guide 303 and the X2-axis linear guide 305 are arranged parallel to each other and spaced apart. The bottom of the mounting bracket 103 of the centering measurement unit 1 is movably mounted on the base body 301 via the X1-axis linear guide 303 and the X1-axis drive assembly 309, enabling movement in the X direction. The X2-axis slide 204 of the component posture adjustment and centering unit 2 is movably mounted on the base body 301 via the X2-axis drive assembly 304 and the X2-axis linear guide 305, enabling movement in the X direction. The compressor rotor positioning tooling 4 is movably mounted on the base body 301 through the X3-axis drive assembly 306 and the X2-axis linear guide 305. The component attitude adjustment and centering unit 2 and the compressor rotor positioning tooling 4 are respectively arranged at the two ends of the X2-axis linear guide 305; the Y2-axis slide 501 of the large nut blind cavity tightening unit 5 is movably mounted on the base body 301 through the Y2-axis linear guide 307 and the Y2-axis drive assembly 308 to achieve movement along the Y direction.

[0046] like Figure 9 、 Figure 10 and Figure 11 As shown, the large nut blind cavity tightening unit 5 includes a Y2-axis slide 501, a C4-axis turntable bearing 502, an X4-axis mounting seat 503, a large nut tightening movable guide rail 504, a large nut tightening assembly drive 505, a center detection assembly drive 506, a center detection assembly movable guide rail 507, a large nut tightening torque drive motor 508, a large nut tightening assembly mounting seat 509, a center detection assembly mounting seat 510, a sensor mounting plate 511, a second industrial camera 512, a second laser sensor 513, a large nut tightening special sleeve 514 and a C4-axis drive assembly 515;

[0047] The Y2-axis slide 501 is movably mounted on the base body 301 of the system base 3 via the Y2-axis linear guide 307 and the Y2-axis drive assembly 308, thereby realizing position switching between the detection and tightening stations along the Y direction; the C4-axis turntable bearing 502 is rotatably mounted on the Y2-axis slide 501 via the C4-axis drive assembly 515. The drive of the C4-axis drive assembly 515 drives the C4-axis turntable bearing 502 to rotate around the Z-axis. The X4-axis mounting seat 503 is mounted on the C4-axis turntable bearing 502, thereby driving the X4-axis mounting seat 503 to rotate around the Z-axis.

[0048] The center detection assembly mounting seat 510 is installed on the X4 axis mounting seat 503 through the center detection assembly drive 506 and the center detection assembly moving guide rail 507. The driving of the center detection assembly drive 506 drives the center detection assembly mounting seat 510 to move along the center detection assembly moving guide rail 507 on the X4 axis mounting seat 503 in the X direction, so as to realize the front and back movement and adjust the measurement distance.

[0049] The sensor mounting plate 511 is fixedly installed on the side of the multi-degree-of-freedom assembly frame 6 close to the center detection assembly mounting seat 510. The second industrial camera 512 is installed in the middle of the sensor mounting plate 511, and is used for visually detecting the center position of the engine case and the slot-shaped phase of the engine low vortex long shaft lock ring.

[0050] The large nut tightening assembly mounting seat 509 is installed on the X4 axis mounting seat 503 through the large nut tightening moving guide rail 504 and the large nut tightening assembly drive 505. The large nut tightening moving guide rail 504 is parallel to the X axis and is arranged at intervals with the center detection assembly moving guide rail 507. The driving of the large nut tightening assembly drive 505 drives the large nut tightening assembly mounting seat 509 to move along the large nut tightening moving guide rail 504 on the X4 axis mounting seat 503 in the X direction, so as to realize the front and back movement and adjust the tightening position. The large nut tightening torque drive motor 508 is fixedly installed on the side of the multi-degree-of-freedom assembly frame 6 close to the large nut tightening assembly mounting seat 509. The large nut tightening special sleeve 514 is connected with the output shaft of the large nut tightening torque drive motor 508. The large nut tightening special sleeve 514 is matched with the large nut slot-shaped groove of the engine low vortex long shaft, so as to realize the automatic tightening of the large nut and ensure the accurate alignment control of the large nut and the low vortex long shaft lock ring slot.

[0051] The multi-degree-of-freedom assembly frame 6 is an assembly frame which can be lifted in the Z direction, rotated in the X direction (engine axial direction) and flipped in the Y direction (engine radial direction).

[0052] Finally, it should be noted that the above embodiments and descriptions are only used to illustrate the technical solutions of the present application, but not to limit the present application. Those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions disclosed by the present application. All of them should be covered in the protection scope of the claims of the present application.

Claims

1. A flexible assembly system for an aircraft engine, characterized in that: It includes a centering measurement unit (1), a component attitude adjustment centering unit (2), a system base (3), a compressor rotor positioning tool (4), a large nut blind cavity tightening unit (5) and a multi-degree-of-freedom assembly frame (6); A multi-degree-of-freedom assembly rack (6) is fixedly installed in the middle of the system base (3); a component posture adjustment centering unit (2) and a centering measurement unit (1) are installed on the system base (3) on one side of the multi-degree-of-freedom assembly rack (6); the centering measurement unit (1) is arranged above the component posture adjustment centering unit (2); the component posture adjustment centering unit (2) and the centering measurement unit (1) both move along the X-direction track of the system base (3); a large nut blind cavity tightening unit (5) is installed on the system base (3) on one side of the multi-degree-of-freedom assembly rack (6); the large nut blind cavity tightening unit (5) moves along the Y-direction track of the system base (3); a compressor rotor positioning tool (4) is installed on the system base (3) between the component posture adjustment centering unit (2) and the large nut blind cavity tightening unit (5); the compressor rotor positioning tool (4) moves along the X-direction track of the system base (3); The centering measurement unit (1) includes a servo electric cylinder (101), a guide assembly (102), a mounting bracket (103), a rotary cylinder (104), a first mounting plate (107), a first industrial camera (108), a first connecting plate, a measuring assembly, a first displacement sensor (109) and a second displacement sensor (110); the bottom of the mounting bracket (103) is connected to the system base (3), the mounting bracket (103) moves along the X-direction track of the system base (3), the upper part of the mounting bracket (103) is installed with a servo electric cylinder (101) and a plurality of guide assemblies (102), and the output shaft of the servo electric cylinder (101) passes downward through the mounting bracket (107). The bracket (103) is connected to the first connecting plate, and the lower ends of the plurality of guide components (102) also pass downward through the mounting bracket (103) and are connected to the first connecting plate, so that the driving of the servo electric cylinder (101) drives the first connecting plate to move up and down in the mounting bracket (103); the first mounting plate (107) is mounted in the first connecting plate through the rotary cylinder (104), a first industrial camera (108) is mounted in the middle of the first mounting plate (107), a plurality of measuring components are mounted on the side of the first mounting plate (107), and a first displacement sensor (109) and a second displacement sensor (110) are also mounted on the side of the first mounting plate (107).

2. The flexible assembly system for an aircraft engine according to claim 1, characterized in that: The multiple measuring components have the same structure, and all include an electric module (105) and a first laser sensor (106). The first laser sensor (106) is mounted on the side of the first mounting plate (107) through the electric module (105).

3. The flexible assembly system for an aircraft engine according to claim 1, characterized in that: The component posture adjustment and centering unit (2) includes a B1 axis drive assembly (201), a Z2 axis servo drive assembly (202), a Y1 axis slide (203), an X2 axis slide (204), a Y1 axis linear guide (205), a C2 axis drive assembly (206), a Z2 axis lifting slide (207), a Z2 axis linear guide (208), a safety latch mechanism (209), a quick-change tool (210), a YZ plane floating slide (211), an A1 axis mounting seat (212), a B1 axis mounting seat (213), a C2 axis mounting seat (214), an A1 axis drive assembly (215), a docking force control sensor (216), a floating slide positioning cylinder (217), a component positioning block (218), a component positioning mounting seat (219), a Y1 axis servo drive assembly (220) and a YZ plane floating slide (221); The X2-axis slide (204) is connected to the system base (3), and the X2-axis slide (204) moves along the X-direction track of the system base (3); the Y1-axis slide (203) is installed on the X2-axis slide (204) through the Y1-axis linear guide (205) and the Y1-axis servo drive component (220), and the drive of the Y1-axis servo drive component (220) drives the Y1-axis slide (203) to move along the Y1-axis linear guide (205) on the X2-axis slide (204); the Z2-axis lifting slide (207) is installed on the Y1-axis slide (207) through the Z2-axis servo drive component (202) and the Z2-axis linear guide (208). 03), the Z2 axis servo drive assembly (202) drives the Z2 axis lifting slide (207) to move along the Z2 axis linear guide (208) in the Y1 axis slide (203); the Z2 axis lifting slide (207) is installed with a C2 axis drive assembly (206), the output end of the C2 axis drive assembly (206) is connected to the C2 axis mounting seat (214), and the C2 axis drive assembly (206) drives the C2 axis mounting seat (214) to rotate around the Z axis on the Z2 axis lifting slide (207); the B1 axis mounting seat (213) is installed on the C2 axis mounting seat (214) through the B1 axis drive assembly (201). 4), the B1 axis drive assembly (201) drives the B1 axis mounting seat (213) to rotate around the Y axis in the C2 axis mounting seat (214); the A1 axis mounting seat (212) is mounted in the B1 axis mounting seat (213) through the A1 axis drive assembly (215), and the A1 axis drive assembly (215) drives the A1 axis mounting seat (212) to rotate around the X axis in the B1 axis mounting seat (213); the YZ plane floating slide (211) is mounted in the A1 axis mounting seat (212) through the YZ plane floating slide (221) and the floating slide positioning cylinder (217), and the floating slide positioning cylinder (217) The YZ plane floating slide (211) is driven to move along the YZ plane floating slide rail (221) in the A1 axis mounting seat (212); the positioning mounting seat (219) is mounted in the YZ plane floating slide (211) through the docking force control sensor (216); a plurality of part positioning blocks (218) are provided on the side of the positioning mounting seat (219) close to the multi-degree-of-freedom assembly frame (6), and safety latch mechanisms (209) are also provided on both sides of the positioning mounting seat (219). The quick-change tooling (210) is fixedly mounted in the positioning mounting seat (219) through the part positioning blocks (218) and the safety latch mechanism (209).

4. The flexible assembly system for an aircraft engine according to claim 1, characterized in that: The system base (3) includes a base body (301), an X1-axis linear guide rail (303), an X2-axis drive assembly (304), an X2-axis linear guide rail (305), an X3-axis drive assembly (306), a Y2-axis linear guide rail (307), a Y2-axis drive assembly (308), and an X1-axis drive assembly (309); The base body (301) is set on the ground, and an X1-axis linear guide (303), an X2-axis drive assembly (304), an X2-axis linear guide (305), an X3-axis drive assembly (306), a Y2-axis linear guide (307), a Y2-axis drive assembly (308) and an X1-axis drive assembly (309) are installed on the base body (301), wherein the X1-axis linear guide (303) and the X2-axis linear guide (305) are parallel and spaced apart, and the centering measurement unit (1) is connected to the X1-axis linear guide (303) and the X1-axis drive assembly (306). 9) is movably mounted on the base body (301), the component posture adjustment and centering unit (2) is movably mounted on the base body (301) through the X2-axis drive assembly (304) and the X2-axis linear guide (305), the compressor rotor positioning fixture (4) is movably mounted on the base body (301) through the X3-axis drive assembly (306) and the X2-axis linear guide (305), and the large nut blind cavity tightening unit (5) is movably mounted on the base body (301) through the Y2-axis linear guide (307) and the Y2-axis drive assembly (308).

5. The flexible assembly system for an aircraft engine according to claim 1, characterized in that: The large nut blind cavity tightening unit (5) includes a Y2-axis slide (501), a C4-axis turntable bearing (502), an X4-axis mounting seat (503), a large nut tightening movable guide rail (504), a large nut tightening component drive (505), a center detection component drive (506), a center detection component movable guide rail (507), a large nut tightening torque drive motor (508), a large nut tightening component mounting seat (509), a center detection component mounting seat (510), a sensor mounting plate (511), a second industrial camera (512), a second laser sensor (513), a large nut tightening special sleeve (514) and a C4-axis drive assembly (515); The Y2-axis slide (501) is movably mounted on the system base (3), and the C4-axis turntable bearing (502) is rotatably mounted on the Y2-axis slide (501) through the C4-axis drive component (515). The drive of the C4-axis drive component (515) drives the C4-axis turntable bearing (502) to rotate around the Z axis. The X4-axis mounting seat (503) is mounted on the C4-axis turntable bearing (502); the center detection component mounting seat (510) is driven by the center detection component ( 506) and the center detection component moving guide rail (507) are installed on the X4 axis mounting seat (503), and the center detection component drive (506) drives the center detection component mounting seat (510) to move along the center detection component moving guide rail (507) on the X4 axis mounting seat (503) along the X direction track; the center detection component mounting seat (510) is fixedly installed with a sensor mounting plate (511) near the side of the multi-degree-of-freedom assembly frame (6), the middle of the sensor mounting plate (511) is installed with a second industrial camera (512), and the side of the sensor mounting plate (511) is installed with multiple second laser sensors (513); the large nut tightening component mounting seat (509) is installed on the X4 axis mounting seat (503) through the large nut tightening moving guide rail (504) and the large nut tightening component drive (505), the large nut tightening moving guide rail (504) and the center detection component moving guide rail (507) are parallel to the X axis and are arranged at intervals, and the large nut The driving of the tightening assembly drive (505) drives the large nut tightening assembly mounting seat (509) to move along the X-direction track on the X4 axis mounting seat (503) along the large nut tightening moving guide rail (504); a large nut tightening torque driving motor (508) is fixedly installed on the side of the large nut tightening assembly mounting seat (509) close to the multi-degree-of-freedom assembly frame (6), and a large nut tightening special sleeve (514) is connected to the output shaft of the large nut tightening torque driving motor (508).

6. The flexible assembly system for an aircraft engine according to claim 1, characterized in that: The multi-degree-of-freedom assembly rack (6) is an assembly rack that can be lifted and lowered along the Z direction, rotated along the X direction, and flipped along the Y direction.

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