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2017 Vol. 60, No. 1/2
Published: 2017-01-15
FEATURE
FIGURE
FORUM
NEW VIEWPOINT
RESEARCH
C0NTENTS
COVER STORY
 
       C0NTENTS
6 C0NTENTS
2017 Vol. 60 (1/2): 6-10 [Abstract] ( 129 ) HTMLNew PDF (2773 KB)  ( 206 )
       FEATURE
16 Experimental Research on Low Frequency Vibration-Assisted Hole Making of Ti/Al Stacked Structure
YANG Haojun1,2, CHEN Yan1,2, XU Jiuhua1,2, ZHANG Yongsheng1,2
DOI: 10.16080/j.issn1671-833x.2017.1/2.016
There are still some problems in assembly holes making of the titanium and aluminum stacks (Ti/Al
stacks), such as the poor holes surface quality and out-of-tolerance diameter. In this article, low frequency vibration-assisted
boring and reaming of Ti/Al stacks were investigatedin compared with the traditional ones.Both chip morphology and processing
quality were analyzed. It was found that distinctive mechanical damage of the Aluminum holes surface could be
significantly reduced due to the improved extraction of the small chip segments.After one operation of boring and reaming
with low frequency vibration assisted processing, The average surface roughness of both titanium and aluminum can reach
R a0.6μm. The hole diameter can meet a tolerance of H7 and the burr height on exit side can be reduced below 200μm.
2017 Vol. 60 (1/2): 16-21 [Abstract] ( 206 ) HTMLNew PDF (2720 KB)  ( 429 )
       FIGURE
22 Precise Measurement Technology for Large Scale Space
2017 Vol. 60 (1/2): 22-23 [Abstract] ( 295 ) HTMLNew PDF (969 KB)  ( 769 )
       COVER STORY
24 Experimental Study on Mill-Grinding of High Volume Fraction SiCp/Al Metal Matrix Composites
LI Xun1, BAI Fan1, FU Yu1, CUI Wei2
DOI: 10.16080/j.issn1671-833x.2017.1/2.024
Based on analyzing the material properties and grinding mechanism, the mill-grinding process is presented
to machine high volume fraction SiCp/Al MMCs. The experimental results show that 65% volume fraction SiCp/Al
MMCs presents the machinability of brittle material. Meanwhile, the electroplated diamond wheel will not be smeared with
soft aluminum to lose machinability. The broken degree of SiC particles is the main influencing factor of surface roughness.
R a value decreases gradually with increasing of disintegrated degree, wheel’s grit number and reducing of feed speed. Under
the given experimental conditions, 120# φ 8mm electroplated diamond wheel is very suitable for rough machining and
MRR can be improved to 2400mm3/min with parameters optimized. At the same time, F z is not more than 25N and F x, F y
are not more than 15N. The finishing SFR can be reached 6400mm2/min utilizing 230# φ 8mm electroplated diamond wheel
under the premise of surface roughness less than R a0.4μm.
2017 Vol. 60 (1/2): 24-28 [Abstract] ( 216 ) HTMLNew PDF (3981 KB)  ( 423 )
       FORUM
32 Drilling Quality Control of CFRP Based on the Carbon Nanotube Buckypaper
WANG Gongdong1,2, LI Nan1, CHONG Qiang1, ZHOU Li1
DOI: 10.16080/j.issn1671-833x.2017.1/2.032
This paper conducted the drilling experiments of carbon fiber reinforced polymer of precast carbon nanotube
buckypaper, then the results of the drilling are detected by the ultrasonic scanning machine. The experimental results
indicated that the carbon nanotube buckypaper in the interlaminates can monitor the position of the drill bit in real-time.
Subsequently, the feed rate can be controlled according to the position of the drill, and the holes quality can be accurately
realized. The process of drilling is simulated by ABAQUS, and the simulation result is found to be in a good agreement
with the experimental result, which demonstrates the effectiveness of the method.
2017 Vol. 60 (1/2): 32-36 [Abstract] ( 174 ) HTMLNew PDF (1957 KB)  ( 426 )
37 Microstructure Control and Tensile Properties of EBM γ-TiAl
CHEN Wei1,2, YANG Yang2, LIU Liangliang3, CHEN Zheyuan2, LIU Dong3
DOI: 10.16080/j.issn1671-833x.2017.1/2.037
The microstructure evolution and tensile properties of electron beam selective melted Ti-48Al-2Cr-2Nb alloy
were studied. The Al loss caused an inhomogeneous microstructure. The as-build material is composed of large γ grains
and small γ grains pinned by a chain-like α2 grains. The γ phase occupies 89% of the material volume and exhibits a weak
texture, but the α2 phase exhibits a 14.1 times random (0001) texture with its c axis parallel to the build direction. The room
temperature tensile strength of the as-build material is 503MPa but the ductility is 0. HIP and heat treatment lowered the
tensile strength but improved ductility by a large extent. Up until 800℃ , the TiAl-4822 with a duplex microstructure exhibits
tensile strength higher than 460MPa; while the TiAl-4822 with a fully lamella microstructure exhibits tensile strength
higher than 400MPa.
2017 Vol. 60 (1/2): 37-41 [Abstract] ( 163 ) HTMLNew PDF (4393 KB)  ( 1319 )
42 Research on Thermal-Mechanical Coupling and Residual Stress Field on Turning GH4169
YAO Changfeng1, CHEN Guangchao1, LIU Chao2, WU Ningning2, LI Xiancai2
DOI: 10.16080/j.issn1671-833x.2017.1/2.042
Nickel-base superalloy GH4169 is a heat-resistant alloy with excellent mechanical properties and corrosion
resistance, which widely used in aerospace engineering and other fields. The residual stress caused by thermal – mechanical
in cutting process has an important effect on the fatigue performance of the part. In this paper, the GH4169 turning
experiments and Deform-3D simulation were carried on. The residual stress field is studied by the experimental cutting
force and the simulative temperature-strain field. The results show that the influence of tool wear on the main cutting force
and turning temperature is very significant. During the tool wear process, the main cutting force increases from 538N to
756N, and the shear zone temperature increases from 552℃ to 654℃ . The surface strain increases from 3.3 to 3.5; The
increase in cutting force and temperature-strain caused by tool wear which result in surface residual tensile stress increase
from 517MPa, 242MPa increased to 860MPa and 442MPa in circumferential and feed direction, the peak residual compressive
stress of the layer increase from -696MPa, -356MPa to -756MPa, -456MPa; the depth of residual stress layer increase
from 72μm to 85μm.
2017 Vol. 60 (1/2): 42-47 [Abstract] ( 243 ) HTMLNew PDF (3235 KB)  ( 601 )
48 Research on Creep-Feed Deep Grinding of Particle-Reinforced Titanium Matrix Composites
LI Zheng, DING Wenfeng, XU Jiuhua, SHEN Long
DOI: 10.16080/j.issn1671-833x.2017.1/2.048
Particle-reinforced titanium matrix composites (PTMCs) has great application potentials in aviation and
aerospace industries. However, it is a typical difficult-to-cut material. Creep-feed deep grinding experiments were carried
out on PTMCs. The effect of grinding parameters and grinding mode on grinding forces and grinding temperatures was investigated.
The grinding temperature distribution and materials removal mechanism were discussed by finite element method.
The results show that the grinding forces increased with the increasing of the workpiece infeed speed and depth of cut.
The grinding forces for down grinding are always 10%~20% higher than that for up grinding, the grinding temperatures for
down grinding are always 10% lower than that for up grinding. When the depth of cut is greater than 0.6mm or the workpiece
infeed speed is larger than 400mm/min, grinding burn is easy to occur for down grinding because the grinding temperature
distribution is different between up grinding and down grinding. Furthermore, heat source model and the boundary
condition under the down grinding and up grinding conditions are proposed, respectively. The grinding temperature distribution
for two different grinding modes is simulated. The grinding temperature predicted by finite element method agrees
very well with the experimental data measured in the current investigation. The main ground-induced defects are adherence
and the voids produced due to the fracture and pull-out of the reinforced particles. The undeformed chip thickness per grain
has a significant effect on the removal mechanism of the hard-brittle reinforcements of PTMCs during grinding.
2017 Vol. 60 (1/2): 48-54 [Abstract] ( 146 ) HTMLNew PDF (3146 KB)  ( 351 )
55 Milling Parameters Optimization for Finish Machining TB6 Based on Machined Surface Integrity
GUAN Chunming, LI Xun, LUO Yang, NIU Yongsong
DOI: 10.16080/j.issn1671-833x.2017.1/2.055
TB6 titanium alloy is widely used in aviation because of its high strength-to-weight ratio and extraordinary
hot deformation behavior, which is the main material to manufacture the primary structure of helicopter rotor systems
as well as the landing gears. To ensure the parts meet the requirement of fatigue properties, finish milling parameters have
been optimized based on the integrity of machined surface. The experiment results show that feed per tooth fz has an obvious
influence on the roughness R a and residual stress σH of the machined surface. When fz increases, the surface roughness
increases linearly. Meanwhile, the amplitude of the residual stress also increases with the increase of fz . The microhardening
rate is mainly effected by the cutting speed vc. The increase of vc leads to the decrease of the micro-hardening
rate. On the other hand, it can be obtained that the cutting width ae has a great influence on the machined surface residual
stress. When ae increases, the amplitude of surface residual stress reduces obviously. According to improving the fatigue
properties, low cutting speed vc , small cutting width ae and high feed per tooth fz should be adopted. At the same time, the
appropriate cutting depth ap can be utilized under the premise of meeting all the design requirements, such as the surface
roughness and machining efficiency.
2017 Vol. 60 (1/2): 55-59 [Abstract] ( 124 ) HTMLNew PDF (1784 KB)  ( 372 )
       NEW VIEWPOINT
60 Positioning Accuracy Research of Assembly Tooling for Aircraft Based on Parallel Mechanism
WANG Wei1; ZHANG Chunliang2; BAI Xinyu2; DING Liping3
DOI: 10.16080/j.issn1671-833x.2017.1/2.060
Aiming at the requirements of localization and posture alignment in aircraft digital assembly, the 3-UPS
parallel mechanism which has 6-DOF was introduced as an aircraft assembly posture and positioning system. First, to
improve the aircraft components assembly precision, an effective length model of 3-UPS was establish by analysis the
kinematic pair error clearance between hinge. Then, the positioning accuracy model of this system was obtained based on
parallel mechanism positive position solution. Finally, the influence of the positioning mechanism motion precision by the
kinematic pair error clearance between hinges was simulated in MATLAB, and the results of the analysis provide a theoretical
basis for control compensation.
2017 Vol. 60 (1/2): 60-64 [Abstract] ( 217 ) HTMLNew PDF (1199 KB)  ( 421 )
       RESEARCH
66 Springback Prediction and Tooling Profile Optimization of Creep Age-Forming
MA Zhenwu1, TONG Guoquan1, XU Baolin2
DOI: 10.16080/j.issn1671-833x.2017.1/2.066
Creep age-forming is a metal forming process that combines creep forming with age strengthening. In
consideration of the big unloading springback value for the forming parts, it’s very important to predict the springback and
optimize the tooling profile. For the creep age-forming of LY12, we fix the classical creep constitutive equation and develop
it as a ABAQUS/CREEP subroutine. we simulate the creep and springback process and establish the springback function of
LY12, and the accuracy of the predicted value is verified by experiments. Using the variable deviation adjusting algorithm,
combines with ABAQUS/CREEP for the optimization of tooling profile, through 7 iterations, we get the profile accuracy of
97.9%. Results show this combinatorial optimization method is fast and owns high accuracy.
2017 Vol. 60 (1/2): 66-69 [Abstract] ( 143 ) HTMLNew PDF (1391 KB)  ( 344 )
       
70 A Method of the Minimal Hole Edge Distance Quick Detecting in the Skin Edge of Aircraft Based on CATIA/CAA
HAN Zhiren1,2, ZHANG Hao2, WANG Jiandong3, ZENG Tian3
DOI: 10.16080/j.issn1671-833x.2017.1/2.070
In the new development stage of aircraft, there may be phenomenons that the edge distance of connecting
hole doesn’t conform to the specification requirements and that connecting hole appears into parts’ R area in the engineering
data set which provided by the design department. Through the edge distance detection can check the defects of the
edge distance of connecting hole, so this rapid detection of edge distance is an important problem. The algorithm of the extraction
and rapid detection minimum distance is put forward and a quick detection software that detects the minimal hole
edge distance in the skin edge by using the CAA/CATIA platform is developed. The software can quickly screen the connecting
hole which is in inconformity to requirement, and then label this hole. The method reduces the waste in the aircraft
manufacturing process and improves the production efficiency.
2017 Vol. 60 (1/2): 70-73 [Abstract] ( 200 ) HTMLNew PDF (2105 KB)  ( 948 )
       RESEARCH
74 Influence of Electroplated Wheel Wear on GH4169 Grinding Surface Integrity
MA Shuang 1, 2，LI Xun 1， SU Shuai 1
DOI: 10.16080/j.issn1671-833x.2017.1/2.074
Electroplated wheels have excellent formability and shape holding capacity which make it more and more
widely used in complex curved surface grinding. But the researches on the surface integrity influenced by wheel wear is
insufficient. Therefore, the surface topography feature of cantilever plunge grinding were studied and the roughness changing
with wheel wear were recorded when the rectangular specimens with high stiffness and a kind of motor stator vane with
weak stiffness were grinded. The result show that the appropriate wear can make the roughness fell by 35%. But the wear
has little influence on surface hardness and residual stress. The weak stiffness of aero-engine blade can increase the roughness.
The appropriate wear not only can make the blade top edge roughness reduce by 64% but also can weaken the influence
on roughness by stiffness and improve the uniformity of surface integrity. So the wear of electroplated wheels can be
estimated by workpiece roughness. The conclusion can help select the wheels with appropriate wear for finish grinding. It
contributes to decrease the roughness of workpiece and improve the uniformity of surface integrity.
2017 Vol. 60 (1/2): 74-78 [Abstract] ( 180 ) HTMLNew PDF (1852 KB)  ( 526 )
       
79 Manufacturing Execution System and Its Application in the Cessna Production
LIU Chun，SHI Hongxiang，WANG Gongdong
DOI: 10.16080/j.issn1671-833x.2017.1/2.079
As MES can manage the process of manufacturing operations, improve the timeliness of delivery capacity
and the flow properties of materials and increase production return rates effectively, it has attracted the attraction of a
number of large and medium domestic enterprises, especially aerospace companies, which actively carry out MES application.
With the implementation and application of MES for Cessna production line in an aviation enterprise, it will introduce
the selection of assembly lines, the division of assembly stations and the process analysis, the planning of structures and
functions of MES, the application of the MES in the production line and etc. Application of MES solves the problems that
traditional methods of production management would not adapt to the aircraft assembly line of high production capacity,
improves the production efficiency greatly and creates a lot of technical and economic benefits.
2017 Vol. 60 (1/2): 79-82 [Abstract] ( 150 ) HTMLNew PDF (1013 KB)  ( 648 )
83 Research on PCD Tool Wear in Turning Titanium Matrix Composites
REN Jinggang1，LI Yangyang2，SU Honghua2，HUAN Haixiang2，LIANG Xinghui3
DOI: 10.16080/j.issn1671-833x.2017.1/2.083
The single factor experimental method was used to the experiments of turning titanium matrix composites
with PCD tools. The wear morphology and mechanism were studied. The results show that, within the cutting speed region
of 15~60m/min, the cutting force gradually decreases from 473N to 367N, the cutting temperature increases gradualls from
274℃ to 564℃ ; the cutting distance increases from 390 m to 702 m and then reduces to 467 m and achieved the maximum
at the cutting speed 45 m/min; the tool wear take place on the rake and flank face at the same time instead of a typical crater
wear on the rake face, the typical strip wear take place on the flank face, both furrow grooves and titanium alloy occur on
the rake and flank face; the tool wear is believed to be caused mainly by the abrasive wear and the adhesive wear. With the
increasing of cutting speed, abrasive wear gradually weakenes while the adhesion wear is obvious.
2017 Vol. 60 (1/2): 83-86 [Abstract] ( 169 ) HTMLNew PDF (1652 KB)  ( 501 )
       RESEARCH
87 Application of Topology Optimization Technique to the Design of Aviation Sheet Metal Parts
WANG Feng
DOI: 10.16080/j.issn 1671-833x.2017.1/2.087
In order to obtain the high carrying capacity and low oil-consumption, the topology optimization technique
was used in the design of aviation sheet metal parts which is a effective method to achieve high-intensity and minimum
weight products. It can be found that the analysis of topology optimization was done to original structure, and the result was
far greater saving and design improvement than sizing or shape optimization.
2017 Vol. 60 (1/2): 87-89 [Abstract] ( 158 ) HTMLNew PDF (1146 KB)  ( 675 )
90 Research on Creep Age-Forming Test of New Al-Li-Cu-Mg Alloy Based on Performing of Rolling Bend
ZHANG Rongxia1,2,3, GAO Zhiyong1,2,3, WU Wei1,2,3, Lü Fenggong1,2,3, ZENG Yuansong1,2,3
DOI: 10.16080/j.issn1671-833x.2017.1/2.090
Research of the Creep age-forming about new Al-Li-Cu-Mg alloy thin sheet has been finished. Through
the correlation between performance of the creep tensile test of T8 sheet and the spring rate of bend-forming, the forming
character of new Al-Li-Cu-Mg alloy has been discovered. It was impossible to reach the last shape only on the method of
age forming process. A new age-forming method based on performing of rolling bend has been extracted. This compound
forming method can meet the requirement of complex curved surface part, which can supply reference for the manufacture
of new era plane body skin.
2017 Vol. 60 (1/2): 90-93 [Abstract] ( 160 ) HTMLNew PDF (1309 KB)  ( 325 )
94 Research on Pixel Processing Information Automatic Input Module of NC Lathe Turning Programming System
SHI Xin
DOI: 10.16080/j.issn1671-833x.2017.1/2.094
According to the requirement of NC lathe turning automatic programming system,in order to solve how to
express and put in parts information effectively, realizing NC programming automation, it has set up the data structures of
parts of revolution solid (including geometric information and processing information).Through the method of intersection
algorithm, it can put the pixel feature extraction information as well as its processing information in when clients pick up
the pixel needed, realizing dealing with its data processing and storing its data structure with the dynamic link library technology.
As it goes, different graphic pixel generates different types of lists and it can make the graphic input and reappear
on the screen by different ways of opening database, realizing output of data structure required by the system.The efficiency
of graphic input is improved, with technology support for visualization of virtual machining of the NC lathe turning offered.
2017 Vol. 60 (1/2): 94-98 [Abstract] ( 125 ) HTMLNew PDF (1600 KB)  ( 412 )
99 Numerical Simulation Study of the Curing Process of Large Thickness Composits Laminate
XU Peng, YAN Dongxiu, LIU Weiping, SUN Kai, KONG Jiaoyue, DONG Liushan
DOI: 10.16080/j.issn1671-833x.2017.1/2.099
Numerical simulation method was employed to study the curing process of large thickness laminate with
the resin of X850 toughened epoxy. Two different curing cycles was studied to analysis the heat release and the highest
temperature in the center when curing. At last, experimental data was used to estimate the accuracy of the theoretical model.
The result shows that overshoot of temperature occurs in the middle layer because of rapid heating, which will impact the
quality of products, and this unfavorable influence can be eliminated by low heating rate. Meanwhile, the experimental data
was used to estimate the simulation model. For the simulation result fits the experiment date very well that the model in this
study can be considered suitable for the prediction of the curing process and the temperature history of X850 resin system
composites.
2017 Vol. 60 (1/2): 99-102 [Abstract] ( 191 ) HTMLNew PDF (1334 KB)  ( 571 )
103 Effects of Water Cooling Temperature on the Microstructural Evolution of TC4 Alloy
KANG Shaopu, LI Zhuang, YU Huanhuan, YU Tao, LI Zhaohua
DOI: 10.16080/j.issn 1671-833x.2017.1/2.103
Water cooling temperature affects morphologies and mechanical properties of TC4 alloy. TC4 alloy was
water cooled from 3 different temperatures after solution treating. The results show that the original β-grain and α-phase
were observed when the specimens were water cooled at 900℃ after solid solution. A uniformly fine-grained structure of
α-phase was observed when the specimens were water cooled at 700℃. The tensile strength and hardness of specimens exhibited
the maximum value (867MPa and HV5218), respectively. More α-phases were precipitated from β-phases with decreasing
water cooling temperature. The tensile strength and hardnesses of the specimens decreased due to coarse lamellar
α-phase.
2017 Vol. 60 (1/2): 103-105 [Abstract] ( 162 ) HTMLNew PDF (1502 KB)  ( 438 )
106 Effect of Defects on Bending Mechanical Property of High Temperature Alloy Honeycomb Panels
WANG Qi, TONG Guoquan, CHEN Feng, MA Zhenwu, YANG Qinxin
DOI: 10.16080/j.issn1671-833x.2017.1/2.106
In the method of defects presets, high temperature alloy honeycomb panels with desoldering are made and
the influence on damage mode and load capacity caused by defects shape, size, location and core tropism are studied by
three point bending test. The investigation shows that reverse bulge appears in the defects compression area and extends to
complete damage along the width direction and the load capacity of the honeycomb panel reduces along with the rising of
defect size. When the defect is located in the extruded area, the honeycomb panels will have higher ultimate bending load
and that of rectangular defect sample is higher than that of circular defect sample. Finally, in order to get the stress distribution
state in bending process, the three point bending performance of high temperature alloy honeycomb panels with circular
defect is analyzed by numerical simulation based on LS-DYNA.
2017 Vol. 60 (1/2): 106-111 [Abstract] ( 127 ) HTMLNew PDF (3141 KB)  ( 664 )
112 Experimental Study on the Pressurized Cabin Co-Curing Process of Carbon Fiber/Epoxy Prepreg of Light Business Jets
LUO Peng1,2,GAO Lanning2, WANG Bin2, XIAO Jun1
DOI: 10.16080/j.issn1671-833x.2017.1/2.112
The pressurized cabin Co-curing technique of carbon fiber/epoxy prepreg for light high-end business jet
AG300 was introduced and studied in this work common background.According to the characteristics of overall molding
pressure cabin for curing furnace, with the aid of DSC to T700G-12K carbon fiber/epoxy presoak curing temperature and
curing degree has carried on the research and analysis, optimization of curing process parameters validated through the
nondestructive testing(NDT) C scan and mechanical testing.The results of the test indicate, The prepreg curing progress of
the pressurized cabin using the gel point temperature of 80℃ for 240min under pressure, then cured at 105℃ for 120min,
finally at 130℃ for 120min. It was the optimal scheme of the experimental group, fewer product defects.
2017 Vol. 60 (1/2): 112-116 [Abstract] ( 182 ) HTMLNew PDF (1538 KB)  ( 615 )
117 Synthesis Error Modeling of the CNC Machine Tool Based on Multi-Body System Theory
BAI Heng, SHEN Jianxin
DOI: 10.16080/j.issn1671-833x.2017.1/2.117
Error compensation is an important approach to further improve the accuracy of machine tools, the real
and accurate error model play a decisive role on the end result of error compensati on.In this paper, Topology structure of
machine tool, error elements of machine tool and coordinate transformation matrix are fully analyze dusing the modeling
method based on multi-body system theory, and synthesiserror model of a specific machine tool is established.Synthesiserror
model provide the error calculation basis for the later real-time error compensation of the specific machine tool.
2017 Vol. 60 (1/2): 117-121 [Abstract] ( 186 ) HTMLNew PDF (1083 KB)  ( 319 )
122 Study on Anti-Pull-off Improvement of Ball Hinge Structure
GU Wanmiao, CHEN Qiang, SONG Zeliang
DOI: 10.16080/j.issn1671-833x.2017.1/2.122
Ball hinge is a common form of engineering, can provide more freedom of movement ,it can reduce the
complexity of the organization. A new design can prevent the ball hinge from being pull-out. After practice verification, the
design can effectively solve the problem and improve the reliability of ball hinge structure.
2017 Vol. 60 (1/2): 122-124 [Abstract] ( 99 ) HTMLNew PDF (1004 KB)  ( 352 )
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