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2021 Vol. 64, No. 16
Published: 2021-08-15
FEATURE
FORUM
C0NTENTS
COVER STORY
APPROACHING SCIENCE
SPECIAL TOPIC
 
       FEATURE
14 Preparation and Application of in-Situ Ceramic Particles Reinforced Al matrix Composites
WANG Haowei
DOI: 10.16080/j.issn1671-833x.2021.16.014
In-situ synthesized ceramic particles have the advantages of small size, regular shape, high stiffness and clean interface of particle/matrix. It is an important technique to prepare high-performance aluminum matrix composites. In-situ TiB2 particles reinforced Al matrix composites exhibit high strength, stiffness, good ductility, fatigue and machining properties. In addition, the components can be manufactured from the in-situ synthesized composites by liquid forming, plastic working and additive manufacturing. It avoids the common problems of Al matrix composite, such as, high cost, complex processes, difficulty in machining processes and hard to fabricate large sized and/or complex components. Therefore, in-situ TiB2 particles reinforced Al matrix composites have a broad application prospect. Based on the detailed cases, the advantages of fabrication and comprehensive mechanical properties of in-situ TiB2 particle reinforced Al matrix composites were analyzed. The application and development in future of the composites are forecasted.
2021 Vol. 64 (16): 14-26 [Abstract] ( 192 ) HTMLNew PDF (1814 KB)  ( 830 )
       COVER STORY
28 Preliminary Research on Aircraft Complex Systems Integration at Final Assembly Stage
LI Tao, JIANG Min, YE Bo
DOI: 10.16080/j.issn1671-833x.2021.16.028
A modern aircraft is equipped with a large number of advanced systems today to meet the mission requirements when operating in complicated working conditions. This leads to the ever-increasing complexities in aircraft system architecture, control interactions, information exchange. Difficulties are also found both in development and integration in manufacturing stage. The nature of aircraft final assembly process is the final integration of complex systems at manufacturing stage. Installations and tests, or physical and functional integration are two main final assembly activities that support each other. The integration design of aircraft final assembly aims firstly to plan the overall process with installation and test tasks towards the aircraft architecture from components, sub-systems, systems and aircraft. A proper integration sequence allows satisfying the comprehensive aircraft function verification that prevents technology and quality hazards in the integration processes. From the systems engineering thinking, this research analyses the relationship between introduction of product functionality and requirements of production operations. Based on that, a methodology of modelbased final assembly integration framework is proposed with general engineering path towards axiomatic process design and collaboration of product design and process planning. An initial case study is also used to have a preliminary analysis of different system dependency aspects influence on integration process planning.
2021 Vol. 64 (16): 28-37 [Abstract] ( 248 ) HTMLNew PDF (205906 KB)  ( 310 )
       FORUM
40 Aircraft Moving Assembly Line—Pulsation and Continuation
FANG Shuiliang, LIU Mengnan, XIAN Guo, QIN Yonghui, TIAN Yuchen
DOI: 10.16080/j.issn1671-833x.2021.16.040
Aiming at the urgent needs of quality assurance, speed improvement, cost reduction and benefit increase in the aircraft final assembly procedure, a large number of domestic and foreign literatures are reviewed about the assembly line for aircraft or its key components. The characteristics of pulsation and continuation moving lines is analyzed, and the applications of aircraft moving assembly lines all over the world are summarized. An overview is presented about the design method of moving assembly line, the optimal scheduling of assembly line balance, logistics management, intelligent assembly line management and control, etc. The Hall three-dimensional model for moving assembly line analysis and design is established, and several research and development suggestions for moving assembly line are proposed. Finally, with a typical aircraft moving assembly case study and analysis, the efficiencies of the pulsation line and continuation line are compared. The results show that the efficiencies of continuation moving line are much higher than that of pulsation moving line.
2021 Vol. 64 (16): 40-50 [Abstract] ( 208 ) HTMLNew PDF (24998 KB)  ( 250 )
51 Restructuring Method of Tooling With Less Redundant Constraints in Aircraft Assembly Line
BA Xiaofu， XUE Hongqian,LI Xining
DOI: 10.16080/j.issn1671-833x.2021.16.051
In order to improve the restructuring performance of tooling in aircraft assembly line to meet the assembly requirements of various aircraft types, a method of tooling restructuring with less redundant constraints is proposed. Based on all redundant constraint model and non redundant constraint model analysis of tooling and connection pairs, and balance analysis of efficiency of tooling restructuring and stiffness of tooling restructuring, by releasing some constraint degrees of freedom which have little influence on the restructuring stiffness but great influence on the restructuring efficiency, the mathematical model of the restructuring with less redundant constraints is established, and then the structural model of the restructuring with less redundant constraints is established. On this basis, the restructuring design of tooling is carried out. The analysis shows that the restructuring performance of the aircraft assembly line tooling can be greatly improved based on the restructuring method with less redundant constraints, in which the restructuring efficiency can be increased by 3 times and the number of connection pairs brought into the restress can be reduced by 50%.
2021 Vol. 64 (16): 51-57 [Abstract] ( 143 ) HTMLNew PDF (13006 KB)  ( 254 )
58 Modelling for Complicated Assembly Line Based on Extended Petri Net
HE Lei, LI Tao, ZHANG Shijiong, TANG Jianjun
DOI: 10.16080/j.issn1671-833x.2021.16.058
Aiming at assembly process complexity and assembly line throughput prediction in aerospace industry, this paper proposed a novel assembly line modelling method that builds the physical-layer and logical-layer model separately, with extended Petri net models respectively. Based on this concept, this research further applies a modelling strategy which links the extended Petri net model of assembly line with discrete event simulation. This allows a discrete event simulation model to be used supporting assembly line throughput prediction under constraints of multi-conditions. This paper uses an aircraft assembly line as case study to implement the proposed modelling strategy and method in a discrete event simulation tool for throughput prediction. The results show that the proposed method is feasible and better at modelling the logic of assembly line operations, as well as the influence on assembly line throughput prediction under different resource configurations.
2021 Vol. 64 (16): 58-64 [Abstract] ( 90 ) HTMLNew PDF (18261 KB)  ( 80 )
65 Discrete Event Simulation Design of Aero-Engine Pulsating Assembly Line
LIAN Yuchen,CHEN Jin,CHENG Huanchong,ZHOU Shuo
DOI: 10.16080/j.issn1671-833x.2021.16.065
In response to the pulsating assembly line construction requirements of high bypass ratio turbofan commercial aero-engines, the pulsating assembly line is modeled using value stream analysis tools and discrete event simulation technology, and key production indicators and their main influencing factors are simulated and optimized. Quantitative analysis of the correlation characteristics of the main influencing factors and the law of contribution to the overall production capacity is conducted. A typical aero-engine pulsating assembly value stream model is constructed and a simulation technology method is proposed to support the construction of advanced pulsating assembly line and capacity planning demonstration, and provide technical reference and reference for the transformation and upgrading of the existing batch production assembly line.
2021 Vol. 64 (16): 65-71 [Abstract] ( 111 ) HTMLNew PDF (18436 KB)  ( 217 )
       APPROACHING SCIENCE
72 Leading the Development of High-End Complex Aviation Product Final Assembly Technology
2021 Vol. 64 (16): 72-73 [Abstract] ( 78 ) HTMLNew PDF (1214 KB)  ( 555 )
       SPECIAL TOPIC
74 Review on Cutting Tool and Processing Technology for Titanium Alloy Aviation Components
SUN Jie, GUO Kai, YANG Bin
DOI: 10.16080/j.issn1671-833x.2021.16.074
In aviation industry, the usage amount of titanium alloys is often regarded as one of the most important indicators to measure the advantages of aircraft materials selection and the development of the aviation industry. However, the excellent properties of titanium alloys also bring great difficulties to processing them. Difficult-to-machine materials and difficult-to-machine structures are the two challenges in the process of machining titanium alloy aeronautical structural parts. This paper summarizes the current research status of the cutting tool and processing technology of titanium alloys components at home and abroad. Then the current bottleneck problems restricting the efficiency of processing of titanium alloys are presented. Finally, the new technology of titanium alloy processing and the development trends are summarized.
2021 Vol. 64 (16): 74-86 [Abstract] ( 170 ) HTMLNew PDF (42876 KB)  ( 176 )
87 Research on Monitoring Test of Milling Tool for Aero-Engine Blade Based on Power Information
QIAO Shi,LIU Kuo,DU Shubo,WANG Pengfei,WANG Yongqing
DOI: 10.16080/j.issn1671-833x.2021.16.087
In view of the problems in the milling process of aero-engine blade, such as tool status is not easy to be observed and tool change depends on experience, a tool condition monitoring system is developed by using the tool status monitoring method based on power information. In the process of machining, the power signal of machine tool spindle is collected by three-phase power sensor in real time, and the signal data is filtered, analyzed and learned off-line, and the power threshold interval is calculated. The power threshold interval is used as the monitoring standard to realize the monitoring of tool machining process and the prediction of tool life. The milling process of aero-engine compressor blade is taken as the research object, and the tool condition monitoring test is carried out. The results show that through the tool condition monitoring method based on power information, the real-time monitoring of the machining condition for aeroengine blade milling tool and the prediction of the remaining life of the tool can be realized.
2021 Vol. 64 (16): 87-92/110 [Abstract] ( 116 ) HTMLNew PDF (9718 KB)  ( 68 )
93 Applications of High Performance Thermoplastic Composites in Civil Aviation
LUO Yunfeng,YAO Jianan
DOI: 10.16080/j.issn1671-833x.2021.16.093
The amount of high-performance composite materials, especially carbon fiber-reinforced resin-based composite materials, has become an important indicator of the advancement of civil aircraft. Among them, thermoplastic composites have attracted extensive attention in the field of civil aviation due to their outstanding toughness, recyclability and rapid low-cost manufacturing advantages over thermosetting composites, and have achieved significant application effects in recent years. This article reviews the application of thermoplastic composite materials based on high-performance thermoplastic resins such as polyphenylene sulfide, poly aryl ether ketone, and polyetherimide in foreign civil aviation structures, and provides a reference for the application direction of thermoplastic composite materials in China.
2021 Vol. 64 (16): 93-102 [Abstract] ( 298 ) HTMLNew PDF (81455 KB)  ( 231 )
103 Synthesis and Thermal/Mechanical Properties Investigations of ANb2O6 (A=Ca, Mg, Co, Ni) Ceramics
LI Baihui,LUO Keren,ZHANG Heying,CHEN Lin,ZHANG Zhibin,CHONG Xiaoyu,LIANG Xiubing,FENG Jing
DOI: 10.16080/j.issn1671-833x.2021.16.103
Thermal barrier coatings (TBCs) have good thermal insulation to protect the high-temperature components of aircraft engine, gas turbine and supersonic aircraft, et al. TBCs are applied to prolong the lifetime and increase the operation temperature of high-temperature components. Low thermal conductivity, high thermal expansion coefficients, comparatively low Young’s modulus and high hardness are required by TBCs. In this work, ANb2O6 (A=Ca, Mg, Co, Ni) ceramics are synthesized by a solid-state reaction, and their crystal structures, hardness, Young’s modulus, thermal conductivity and thermal expansion coefficients (TECs) are systematically studied. The maximum value of hardness reaches 7.8GPa, and their Young’s modulus are relatively low (100-180GPa). The lowest thermal conductivity reaches 1.59W/(m·K) (1200℃), and the highest TECs is 9.1×10-6 K-1 (1200℃). The excellent thermal/mechanical properties pronounce that ANb2O6 ceramics are potential TBCs smaterials.
2021 Vol. 64 (16): 103-110 [Abstract] ( 144 ) HTMLNew PDF (21476 KB)  ( 100 )
  Notices
· 'Aeronautical Manufacturing technology ' is included in EI database
· China Science Citation Database (CSCD)
· Chinese S&T Journal Citation Reports (CJCR)
· World Journal Clout Index (WJCI) Report of Scientific and Technological Periodicals
· Supported in China Science and Technology Journal Excellence Action Plan
· Aeronautical Manufacturing Technology ranked No. 3 in Chinese S&T Journal Citation Reports (CJCR)
· High Quality Sci-tech Journal Classification Catalogue in Aerospace Field （2023）
· A Guide to the Core Journals of China (hosted by Peking University Library)
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