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
2022 Vol. 65, No. 11
Published: 2022-06-01
FEATURE
FORUM
RESEARCH
C0NTENTS
COVER STORY
 
1 COVER
2022 Vol. 65 (11): 1-1 [Abstract] ( 65 ) HTMLNew PDF (1959 KB)  ( 56 )
       C0NTENTS
6 CONTENTS
2022 Vol. 65 (11): 6-10 [Abstract] ( 56 ) HTMLNew PDF (424 KB)  ( 51 )
       FEATURE
14 Effect of Pre-Mixed Water Jet Velocity on Surface Roughness and Residual Stress of 18CrNiMo7-6 Carburized Steel
MA Yongtao，ZHAI Linbang，LIU Lanrong，MA Shenggang，LU Chunsheng，SUN Ning，ZHANG Bin
DOI: 10.16080/j.issn1671-833x.2022.11.014
In this study, the jet velocity is controlled by changing the jet pressure on a new designed pre-mixed water jet modification system. The surface strengthening effect at different jet velocities on 18CrNiMo7–6 carburized steel is evaluated from two aspects of surface roughness and residual stress. Based on the impact stress analysis of water and shot in jet, the relationship between jet velocity and impact stress is established. With the jet velocity represented by the nozzle inlet pressure, experiments were carried out by using a single factor method. At the pressure below 35MPa, the impact of shot is the main reason for the plastic deformation of sample surface. The surface roughness and residual stress, as well as the layer depth of residual stress field, increase with the shot velocity. However, as the jet velocity exceeds 178m/s, the increase of surface roughness is obvious while the residual stress does not increases significantly. It is indicated that a good modification can be achieved in the pre-mixed water jetting with the particle velocity of 143–178m/s.
2022 Vol. 65 (11): 14-20 [Abstract] ( 133 ) HTMLNew PDF (3548 KB)  ( 347 )
       COVER STORY
22 Experimental Study on Mixed Plasma Deep Hole Machining of Superalloy GH4169
WU Fujia, WANG Shuai, LIU Junqiang, ZHOU Hao
DOI: 10.16080/j.issn1671-833x.2022.11.022
GH4169 superalloy deep hole parts are widely used in aerospace fields. There are some problems in machining GH4169 superalloy deep hole by traditional drilling method, such as serious tool wear, high cutting heat and low cutting efficiency. Mixed plasma machining is a kind of special machining method, which has the characteristics of zero cutting force and high machining efficiency. The mixed plasma machining can be used in the deep hole machining of GH4169 superalloy to solve the difficult problems. The peak current, spindle speed and electrode feed speed are important influencing factors in the deep hole machining of GH4169 superalloy by using mixed plasma, and the surface roughness and material removal rate are the performance indexes to measure the machining effect. Single factor and orthogonal experiment were used to control the test, and the obtained experimental data were analyzed by extreme value method and grey correlation degree. The optimal combination of test parameters was obtained as follows: When the peak current is 25A, the spindle speed is 75rad/min, and the electrode feed speed is 0.45mm/min, the measured material removal rate is 158.65mm3/min, and the surface roughness is 1.9μm. Compared with the drilling deep hole processing of GH4169 superalloy, the machining efficiency is greatly improved.
2022 Vol. 65 (11): 22-27 [Abstract] ( 151 ) HTMLNew PDF (1174 KB)  ( 264 )
       FORUM
30 Review of Hybrid Laser Removal Processing Technologies
DING Ye，WU Xuefeng，GUAN Yanchao，WANG Shuiwang，CHEN Mingjun，YANG Lijun
DOI: 10.16080/j.issn1671-833x.2022.11.030
Laser machining can be used for almost all engineering materials because of its ability to process simple or complex shaped parts at the macro to micro scale. However, there are still some shortcomings in the laser processing technology, such as thermal stress, processing burrs and thermal damage. Other manufacturing processes such as cutting, electrical discharge machining and electrochemical machining, have the disadvantages of low efficiency and severe tool wear when machining difficult-to-machine materials. Researchers have been looking for methods to solve these problems and hybrid processing is a solution strategy. Hybrid laser processing is a new process that combines one or several processing technologies based on laser processing. In the process of ablating the material, the composite energy field is used to enhance the removal rate, improve the surface integrity, and reduce the thermal damage. Another way is to use the laser as an auxiliary energy field to help improve the machinability of materials and improve the surface quality, increase material removal rate and reduce tool wear. Laser-assisted machining, water-jet guided laser machining and laser composite probe nanofabrication are three typical hybrid laser machining processes. The principles, simulation and experimental research of processing technology are discussed. The improved process efficiency, reduced machining costs and improved quality of machined parts demonstrate the great application potential of hybrid laser machining. Finally, the shortcomings of the current research and the future development direction of the hybrid laser processing technology are pointed out.
2022 Vol. 65 (11): 30-47 [Abstract] ( 134 ) HTMLNew PDF (70802 KB)  ( 223 )
48 Research Progress of Laser Cleaning Technology for Aerospace Materials
TONG Yanqun, MA Jian, SHANGGUAN Jianfeng, JIANG Bin, LU Jiangyi, DING Liuxin, CHEN Liang, WANG Shuai
DOI: 10.16080/j.issn1671-833x.2022.11.048
Carbon fiber composites, aluminum alloys and titanium alloys are important materials for manufacturing aerospace vehicles. But at the same time, its shortcomings can be seen at a glance, such as the manufacturing technology is complex, the manufacturing quality requirements are extremely strict, and the manufacturing cost remains high, and the requirements for cleaning accuracy and efficiency are higher, which make the traditional cleaning methods with high pollution, poor adaptability and poor controllability to be updated. Therefore, this paper briefly describes the research status of laser cleaning in aerospace field, and with emphasis on the laser cleaning technology of three aerospace materials: Carbon fiber composite, titanium alloy and aluminum alloy. Ultimately, the literature shows that laser cleaning of surface materials of aerospace materials has remarkable effect, environmental protection and no damage to the substrate. Even under the optimal process parameters, it can effectively improve the surface properties of some materials. In addition, combined with sensing and intelligent manufacturing technology, laser cleaning can carry out controllable high-precision cleaning in the field of space-time, which will have a good application prospect.
2022 Vol. 65 (11): 48-56/69 [Abstract] ( 120 ) HTMLNew PDF (48085 KB)  ( 474 )
57 Effect of Combination of Laser Shock Peening and Shot Peening on Surface Integrity and Fatigue Property of K4169 Casting Alloy
LUO Xuekun， ZHANG Wencan，WU Bo，TIAN Kai，WANG Kun，WANG Yiming，WANG Xin
DOI: 10.16080/j.issn1671-833x.2022.11.057
K4169 alloy is widely used to fabricate the stator component of aeroengine. In order to improve the high-temperature fatigue property of K4169 alloy, notch specimens for rotating bending fatigue were treated by the combination processing of laser shock peening (LSP) and shot peening (SP). The fatigue lives of single SP and combination processing (LSP+SP) were compared and analyzed. The fatigue fracture, three-dimensional surface morphology, roughness, surface residual stress and microhardness distribution were characterized by scanning electron microscopy (SEM), white light interferometer, X–ray diffractometer and microhardness tester. The mechanism of the combination processing on the fatigue performance was also investigated. The results indicate that the LSP+SP treatment shows better improvement of fatigue life than that of SP under the 647℃, 450MPa conditions. After LSP+SP, the number of fatigue crack source decreases, and the location of the main source transferred from the surface to the subsurface. Moreover, the fatigue crack growth rate also decreases. In addition, the micro-stress concentration factor Kt of the surface decreased from 2.39 to 1.46, and the surface residual compressive stress increased from –258MPa to –1140MPa. A work hardening layer with the depth of about 0.20mm was also generated. The improvement of fatigue life is considered to be mainly ascribed to the change of above surface integrity parameters.
2022 Vol. 65 (11): 57-62 [Abstract] ( 125 ) HTMLNew PDF (12307 KB)  ( 188 )
63 Effect of Scanning Speed on Microstructure and Microhardness of 1Cr17Ni2 Stainless Steel Repaired by GH4169 Lasering
CHENG Donghai, CHENG Peiyuan, XIONG Zhenyu, WANG De
DOI: 10.16080/j.issn1671-833x.2022.11.063
The laser repair experiment of 1Cr17Ni2 stainless steel was carried out with GH4169 alloy. The test discussed that how different scanning speeds influenced the microstructure and microhardness. With the rise of scanning speed, the quality and mechanical properties have been obviously ameliorated, while the microstructure and microhardness of the cladding layer will be damaged at too high scanning speed. When the scanning speed is 0.012m/s, the grain structure is excellent, and the average solidity is 9.78% higher than the matrix. The average mass fraction of Nb in the dendrite dry in the cladding area increases to 5.58% and the average volume fraction of Laves phase decreases to 2.3%. The properties are coordinated with the matrix, and the mechanical properties are good. The microstructure after repair is mainly formed of γ , γ′, γ″ and δ, the grain structure is formed by parallel columnar crystal structure without obvious welding defects, and the cladding layer forms a close metallurgical bond with the matrix.
2022 Vol. 65 (11): 63-69 [Abstract] ( 101 ) HTMLNew PDF (32205 KB)  ( 80 )
       RESEARCH
70 A Review on Deep Cryogenic Treatment of Titanium Alloy
JI Zhijun，LI Guirong，YE Yurong，NAN Hai，CAO Zili，WANG Hongming
DOI: 10.16080/j.issn1671-833x.2022.11.070
This paper introduces the meaning of cryogenic treatment technology and its modification effect on aluminum alloy, magnesium alloy, copper alloy and high-entropy alloy, and focuses on the research progress and modification mechanism in the deep cryogenic treated titanium alloy. It shows that cryogenic treatment has a significant modified effect on the microstructure and properties of titanium alloy. It can refine grain size, improve dislocation density, promote the formation of twin and sub-crystal structure, promote phase transformation and phase precipitation, and promote the formation of texture, and enhance the strength and toughness of titanium alloy through the mechanism of fine grain strengthening, dislocation strengthening, precipitation strengthening, texture strengthening and so on. The strength and toughness of titanium alloy can be improved synchronously by optimizing the parameters of deep cryogenic treatment. In conclusion, deep cryogenic treatment on titanium alloy is a new method and technology for solid state treatment with “high performance, high quality, low cost and low pollution” characteristic.
2022 Vol. 65 (11): 70-75 [Abstract] ( 192 ) HTMLNew PDF (5122 KB)  ( 377 )
76 Recent Advance in Refractory Metal Polymer-Derived Ultra-High Temperature Ceramics
GAO Qiang, HAN Cheng, WANG Xiaozhou, WANG Yingde
DOI: 10.16080/j.issn1671-833x.2022.11.076
Polymer-derived ceramic method is one of the most important methods for preparing ultra-high temperature ceramics (UHTCs). By rationally designing the molecular structure of polymer precursors, it is easy to regulate the microstructure and properties of the final ceramics. Refractory metal polymers with unitary molecular structure and good linearity as a kind of single-source precursor is very promising in preparing UHTCs, especially continuous UHTC fibers. This review firstly summarizes the structure-function relationship within UHTCs, which provides significant guidance for designing the elemental composition and molecular structure of refractory metal polymer as UHTCs precursor. The latest research progress of refractory metal polymer-derived UHTCs is outlined, with special emphasis on precisely regulating the molecular chain of refractory metal polymer. Finally, the development direction of polymer-derived UHTCs is briefly prospected. This review is expected to promote the research and development of polymer-derived UHTCs for application in the fields of aerospace, nuclear energy and other extreme thermal environments.
2022 Vol. 65 (11): 76-86 [Abstract] ( 95 ) HTMLNew PDF (10661 KB)  ( 39 )
87 Research Advances in Thermal Error Compensation Technology for Motorized Spindle
LI Yuan，QU Hang，DAI Ye，ZHAN Shiqiang
DOI: 10.16080/j.issn1671-833x.2022.11.087
In this paper, the research progress and development direction of the high-speed motorized spindle thermal error compensation technology at home and abroad in recent years has been described, focusing on the analysis of the motorized spindle data detection technology, the temperature measurement point optimization technology, the thermal error modeling technology, the thermal error compensation method, and other aspects. Finally, to promote the development of high-speed motorized spindle thermal error pre-compensation technology, its future research direction has been prospected. The analysis and the outlook of the current situation of several key stages of the high-speed motorized spindle thermal error compensation technology will play an important role in guiding the progress of the thermal error control technology in the field of CNC machining.
2022 Vol. 65 (11): 87-97/103 [Abstract] ( 130 ) HTMLNew PDF (9983 KB)  ( 88 )
98 Development of Deployment Software for Aircraft Panels Based on CATIA
HU Jianhua，ZHANG Tianyang，WANG Guanyu，JIANG Jiancheng，HU Yongxiang，HE Xueting
DOI: 10.16080/j.issn1671-833x.2022.11.098
Aiming at the requirements of efficient deployment of integral panel in aviation field, this paper first establishes a set of complex feature reconstruction method and improves the theoretical basis of complex panel deployment, and then uses MATALB software to redevelop CATIA and build a set of integral panel deployment software based on surface deployment method and feature reconstruction method proposed in this paper. Taking a typical verification part of a wing panel as an example, the deployment accuracy of the software is verified. The results show that the shape and size of the digital simulation of the deployment blank are accurate.
2022 Vol. 65 (11): 98-103 [Abstract] ( 134 ) HTMLNew PDF (2726 KB)  ( 406 )
104 Summary of Key Technologies for Error Compensation of CNC Machine Tools
Lü Xuehu, GUO Qianjian, WANG Haotian, WANG Wenhua, ZHU Shuailun, CHEN Shutong
DOI: 10.16080/j.issn1671-833x.2022.11.104
Error compensation technology is an effective and economical means to improve the accuracy of CNC machine tools. The geometric error, thermal error and cutting force error account for 75% of the total error of the machine tool. Controlling these three errors is the key to improve the machining accuracy of the machine tool. This paper summarizes the traditional indirect measurement method and sample test method, and discusses the characteristics of error measurement methods such as ball instrument test, laser measurement, plane orthogonal grating method, round table sample test and S type specimen test. Several main modeling methods and methods of determining error modeling variables are systematically analyzed. The error compensation technology is analyzed from modifying numerical control code, designing external hardware device and error compensator. Finally, combined with the machine tool error measurement, error modeling, error compensation three parts, the key technology of error compensation is summarized, some key problems existing in the precision optimization of CNC machine tools are pointed out, and the future research direction is forecasted to provide reference for the future CNC machine tool error compensation design.
2022 Vol. 65 (11): 104-111/119 [Abstract] ( 140 ) HTMLNew PDF (11468 KB)  ( 231 )
112 Accurate Segmentation Technology of Point Cloud Data Based on Feature Template
LIANG Biao，LI Shuanggao，HUANG Xiang，LI Gen，PENG Yun
DOI: 10.16080/j.issn1671-833x.2022.11.112
With the continuous development of digital measurement technology, the scale of acquired three-dimensional point cloud data has increased dramatically, and the segmentation technology of point cloud data has become particularly important in data processing. In this paper, combining the characteristics of the measured point cloud data of aircraft parts and components, it proposes a precise segmentation technology of point cloud data based on feature templates. First, extract the surface features to be recognized in the theoretical digital model, construct a feature template and store it in the template database; Then use the spatial grid method to establish the point cloud topological relationship and complete the rough segmentation of the point cloud based on the feature template; The point cloud normal vector is estimated by principal component analysis, and the surface-based adaptive region growing algorithm is used to further finely segment the coarsely segmented point cloud. Example verification shows that this technical method can achieve the purpose of accurate segmentation of point cloud data.
2022 Vol. 65 (11): 112-119 [Abstract] ( 138 ) HTMLNew PDF (9031 KB)  ( 247 )
  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