Home   |   About Journal   |   Editorial Board   |   Instruction   |   Publication Ethics Statement   |   Subscriptions   |   Contacts Us   |   Chinese
  Office Online  
    Submission Online
    Peer Review
    Editor Work
    Editor-in-chief
    Office Work
  Journal Online
    Accepted
    Current Issue
    Advanced Search
    Archive
    Read Articles
    Download Articles
    Email Alert
    
Quick Search  
  Adv Search
2020 Vol. 63, No. 4
Published: 2020-02-15
FEATURE
FORUM
RESEARCH
C0NTENTS
COVER STORY
 
       FEATURE
14 Study on Characteristcs of Electro Stream Machining and Controlling Technology of Hole Morphology
PAN Zhifu, FU Junying, ZHANG Mingqi
DOI: 10.16080/j.issn1671-833x.2020.04.014
A technique of electro stream machining used to process the film cooling holes of single crystal turbine blade of aero-engine is described. The mechanism of electro stream machining, the effect of technology on the microstructure of single crystal matrix, the characteristics of orifice morphology and the control method are described in detail. In particular, an effective process control method is proposed for several typical orifice defects to ensure the surface quality of film cooling holes and obtain good orifice morphology
2020 Vol. 63 (4): 14-20 [Abstract] ( 387 ) HTMLNew PDF (4392 KB)  ( 485 )
       COVER STORY
22 Research Status of Machining γ–TiAl Intermetallic Compounds Both in China and Overseas
LIAO Yangjilian, GU Lin, LIU Suyi, HE Guojian
DOI: 10.16080/j.issn1671-833x.2020.04.022
The main characteristics of gamma–TiAl intermetallic compounds were introduced. Poor plasticity and tenacity, low thermal conductivity are the main factors that lead to high cutting temperature, high cutting force and poor surface quality. The typical machining and non-traditional machining methods of gamma–TiAl intermetallic compounds were summarized from the aspects of tool life, machining efficiency and surface quality. And we consider that grinding and electrochemical machining are suitable machining methods at present. However, there is still a lack of processing technology that can give consideration to efficiency, cost and surface quality.
2020 Vol. 63 (4): 22-33 [Abstract] ( 314 ) HTMLNew PDF (6550 KB)  ( 590 )
       FORUM
36 Simulation Study on Gap Flow Field in EDM Small-Hole Machining Based on Internal Flush
LIU Yu, LIU Chuangye, MA Fujian, YANG Dapeng, SHA Zhihua,
DOI: 10.16080/j.issn1671-833x.2020.04.036
In the process of small-hole machining in EDM, if the debris and bubbles are not removed from the gap flow field, which will seriously affect the processing efficiency and surface quality. By analyzing the characteristics of discharge gap, the geometric model of three-dimensional cylindrical gap flow field is established, the VOF, DPM model and the secondary development function of FLUENT were used to realize the continuous and random generation of debris and bubbles in the bottom machining gap, the simulation model of gas-liquid-solid three phase flow coupling of gap flow field in micro hole EDM was established, and adding hollow internal flushing liquid to remove debris, the distribution of debris and bubbles in the gap flow field was simulated and analyzed under different velocity and processing depth. Through the statistics of debris particle distribution, the results show that increasing the velocity of the internal flushing fluid can promote the remove of the debris and reduce the concentration of the bubble phase in the bottom gap and the side gap. The smaller the machining depth is, the greater the upward velocity of the bottom gap is, and the easier the debris and bubbles are removed.
2020 Vol. 63 (4): 36-42 [Abstract] ( 235 ) HTMLNew PDF (6761 KB)  ( 333 )
43 Fabrication Method and Application of EDM Tool Electrode for Machining Micro Internal Grooves of Slow Wave Structure
REN Liansheng, YANG Liguang, GUO Yan, FU Jinjuan
DOI: 10.16080/j.issn1671-833x.2020.04.043
Aiming at the problem of machining the micro-inner grooves of slow-wave structure, the key component of microwave vacuum electronic devices, a method of micro-electrical discharge machining the micro-inner grooves is proposed in this paper. The tool electrode was designed and fabricated by means of laminar combination. The EDM parameters with low loss and reliable processing were determined through the technological experiment of this electrode, and the machining of micro-inner groove of slow-wave structure was realized. The results show that the EDM technology and the combination tool electrode are one of the effective methods to solve the problem of slow-wave structure microgroove machining, and the workpiece can meet the requirements of the drawing design.
2020 Vol. 63 (4): 43-47 [Abstract] ( 203 ) HTMLNew PDF (2344 KB)  ( 263 )
48 Optimization and Comparison of Trimming Parameters of Leading and Trailing Edges of Aero-Engine Blade by Vibration Aided EDM
SONG Tao, LONG Jin, YAN Buyun, WANG Xiaoying, MA Liangqi, YU Zuyuan
DOI: 10.16080/j.issn1671-833x.2020.04.048
To correct the dimensional and shape errors of leading and trailing edges of aero-engine blade after electrochemical machining (ECM), experiments of rough machining in trimming process are carried out by electrical discharge machining (EDM). In vibration aided EDM, the discharge gap and pressure in the gap varies, resulting in debris escaping easily, leading to the stable process and improvement of machining efficiency. To obtain the optimal machining parameters in rough trimming of edges of aero-engine blade by EDM, extensive cutting experiments of GH4169 with dimensions of 29×29×0.5mm3 have been carried out. Based on primary experimental results, orthogonal experimental design is used to study the effects of peak current, pulse width, amplitude and frequency of vibration on material removal rate (MRR). The optimum processing parameters of GH4169 nickel base alloy are pulse on-time of 4μs, peak current of 30A, vibration amplitude of 1.2μm, vibration frequency of 1200Hz, and MRR is up to 10.86mm3 /min. The influence of different workpiece materials on the experimental results is studied by single factor experimental method under the same processing parameters.
2020 Vol. 63 (4): 48-53 [Abstract] ( 194 ) HTMLNew PDF (2472 KB)  ( 196 )
54 Study on EDM Technology of SiCP/2024Al Composites
YU Peng, XU Jinkai, CUI Guangxu, LIAN Zhongxu, YU Huadong
DOI: 10.16080/j.issn1671-833x.2020.04.054
The deep hole processing of SiCP/2024Al composites was carried out by electrical discharge machining (EDM) process. The effects of different electrode cross-section shapes on processing performance such as material removal rate, machining stability and hole quality were studied. The results showed that the processing efficiency of EDM deep hole using spiral electrode was significantly higher than that of the cylindrical electrode under the same processing conditions. During the processing of the cylindrical electrode, the electro erosion debris accumulated in the electrode gap caused the tool electrode to retreat frequently, which greatly reduced the processing efficiency. Melting, vaporization and oxidation of electrode materials will occur during EDM of SiCP/2024Al composites. At the same time, thermal spalling of SiC particles will also occur. Micro-cracks were observed on the surface of EDM. During the process of EDM, the quenching process from high temperature to low temperature caused thermal stress in the composite material. When the stress exceeded the strength limit of the material, the stress will be released by the plastic deformation of the material, resulting in micro-cracks.
2020 Vol. 63 (4): 54-59 [Abstract] ( 164 ) HTMLNew PDF (9914 KB)  ( 99 )
       
60 Focus on High-Performance Precision Manufacturing for High-End Equipments
2020 Vol. 63 (4): 60-61 [Abstract] ( 151 ) HTMLNew PDF (573 KB)  ( 235 )
       RESEARCH
62 Laminated Slip Manufacture Method for Large Fuselage Hat–Section Stringer
XUE Xiangchen,HU Jiangbo,WANG Ben,LIANG Xianzhu, ZHENG Xiaoling, CHEN Ping
DOI: 10.16080/j.issn1671-833x.2020.04.062
Laminated slip process is a new method for automated manufacturing of large hat–section stringer. In order to verify the process, multi–faceted research and verification were conducted. The large stringer was manufactured, through the technologies of ATL, ultrasonic cutting, lamination slip forming, autoclave curing, etc. The result shows that the technology has low risk and high quality consistency, which provides a technical basis for the automated manufacturing of large composite stringer.
2020 Vol. 63 (4): 62-67 [Abstract] ( 226 ) HTMLNew PDF (4023 KB)  ( 432 )
68 Development of Digital Model Recognition System for Electron Beam Fused Additive Manufacturing
TANG Shaoning,LIAO Dunming,LIU Ziyu,YANG Guang, YANG Fan
DOI: 10.16080/j.issn1671-833x.2020.04.068
Aiming at the shortcomings of tedious operation and low efficiency in the digital model reconstruction process of electron beam fuses, the NX Open API was used as a development tool to develop a digital-model feature recognition and quick reconstruction system. The identification of typical structural features is achieved by rule-based boundary matching. At the same time, the parameters of the recognition feature and the interactive selection feature are extracted, and the feature reconstruction is completed according to the established rules. Through the digital model feature recognition and rapid reconstruction system, complex reconstruction operations can be realized quickly, and a large number of repeated feature reconstruction work is automatically completed, which improves the efficiency and standardization of digital-to-analog reconstruction.
2020 Vol. 63 (4): 68-81 [Abstract] ( 194 ) HTMLNew PDF (2121 KB)  ( 324 )
74 Research on Key Digital Technology of Aircraft Pulsation Assembly Production Line Based on Model
ZHANG Xiaomei
DOI: 10.16080/j.issn1671-833x.2020.04.074
Based on the project of pulsation production line of an aircraft assembly plant, this paper studies the key technologies of the application of pulsation assembly line based on model-based system engineering and intelligent manufacturing. Through the research of the key technology of the aviation pulsation assembly line, the product development process of the aviation pulsation assembly line based on the model is opened, which provides technical support for the digital production and intelligent decision-making of the aviation pulsating assembly line.
2020 Vol. 63 (4): 74-81 [Abstract] ( 357 ) HTMLNew PDF (2038 KB)  ( 738 )
82 Research on Design Method of Machining Process Convex Based on Stiff Reinforcement
LUO Jinwei, YI Yuan, QIU Shiguang, LIU Yuanji
DOI: 10.16080/j.issn1671-833x.2020.04.082
Based on the mechanical model of bending deformation of the beam, a mathematical model for calculating the stiffness of the ventral plate of a single open rectangular groove cavity including a process convex platform is established. On the basis of this, the numerical calculation method is used to analyze the effect of the process convex table on the geometric center position of the groove and the stiffness of the groove center, and the effect of the size of the process convex table on the stiffness reinforcement. The calculation results show that when a process convex platform is set up in the center of the slot of the opening slot, the reinforcement stiffness of the groove edge is approximately linear with the width dimension of the process convex platform, and the reinforcement stiffness of the groove edge is very sensitive to the length size of the convex platform. With the reduction of the length of the convex platform, the stiffness reinforcement effect of the convex platform on the edge of the groove is very significant, and the stiffness enhancement effect of the convex platform on the geometric center of the ventral plate is almost negligible.
2020 Vol. 63 (4): 82-87 [Abstract] ( 196 ) HTMLNew PDF (2566 KB)  ( 207 )
88 Research on NC Automatic Programming System of Aero-Engine Centrifugal Impeller Based on UG NX
YU Jiapeng,LU Yonghui,JIANG Bohong,SUN Jiaming,ZHANG Shuo
DOI: 10.16080/j.issn1671-833x.2020.04.088
Aiming at the problems of inefficiency, irregularity and complicated operation in NC programming of aero-engine centrifugal impeller, a fast programming mechanism based on feature as processing unit is proposed, which includes recognition of machining features, automatic analysis of feature dimensions, automatic creation of blanks, automatic formulation of processing routes, automatic optimization and setting of cutting parameters, and generation of original tool path files. Using UG secondary development technology, an automatic programming prototype system is developed. The application examples and numerical simulation results show that the programming efficiency of the prototype system is improved by more than 60%, and the quality of programming is also guaranteed, which proves the practicability of the prototype system.
2020 Vol. 63 (4): 88-95 [Abstract] ( 210 ) HTMLNew PDF (2929 KB)  ( 429 )
96 Design and Implementation of Fault Management Platform for Aircraft Assembly Oriented to Knowledge Engineering
CAI Yaoqi, CHEN Lei, CHEN Zhen
DOI: 10.16080/j.issn1671-833x.2020.04.096
Aiming at the problems of complex aircraft assembly system, various faults in system installation and electrical debugging and difficulty in quality control, a fault management platform for aircraft assembly oriented to knowledge engineering is proposed. This paper analyzes the fault characteristics of aircraft assembly phase and classifies them, builds a fault management platform framework, and implements the system development with structured and modular methods. The application structure shows that the platform realizes the recording, processing and statistics of the faults on the assembly site, forms the knowledge of the contents and debugging methods of faults, and improves the efficiency of the debugging of the aircraft assembly through the statistical analysis of the faults, thereby improving the assembly quality of the products.
2020 Vol. 63 (4): 96-100 [Abstract] ( 214 ) HTMLNew PDF (1587 KB)  ( 498 )
  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)
  Download
Copyright Transfer Agreement
  Links
22 AVIC Manufacturing Technology Institute
22 AVIC
Copyright © Editorial Board of Aeronautical Manufacturing Technology
Supported by: Beijing Magtech