AVIC Harbin Dongan Engine group Corporation LTD
AVIC Harbin Dongan Engine group Corporation LTD
Zhang Y.,AVIC Harbin Dongan Engine Group Corporation Ltd. |
Liu H.-H.,AVIC Harbin Dongan Engine Group Corporation Ltd. |
Yu Z.-J.,AVIC Harbin Dongan Engine Group Corporation Ltd.
Zhuzao/Foundry | Year: 2017
To study feeding distance (FD) of casting alloy, recent research methods and consequent results were summarized and generalized in terms of factors and calculation methodology of FD. The effects of those aspects such as different materials and pouring process, width/thickness ratio of casting, riser's size, chill's geometry, pouring parameters and so on were summarized further and the problems in recent study were pointed out. Aiming at domestic aerospace industry, researchers should focus on the application of FD to casting gating system design and defects solving. © 2017, Chinese Mechanical Engineering Society. All right reserved.
Sui H.,Beihang University |
Zhang X.,Beihang University |
Zhang D.,Beihang University |
Jiang X.,Beihang University |
Wu R.,AVIC Harbin Dongan Engine Group Corporation Ltd.
Journal of Materials Processing Technology | Year: 2017
For a series of unique properties, titanium alloy has been widely applied in aviation and aerospace fields. However, the poor machinability makes high-speed machining titanium alloy hardly perform as expected even with advanced tool materials due to the high cutting temperature. Intermittent cutting could be an effective method to decrease the cutting temperature and improve the cutting performance. As typical intermittent cutting methods, traditional ultrasonic vibration cutting (UVC) and elliptical ultrasonic vibration cutting (EUVC) have achieved significant advancements. However, the critical cutting speed confines them to the field of low speed machining. This article proposed a new type of ultrasonic vibration cutting, i.e. high-speed ultrasonic vibration cutting (HUVC), in which the vibration is always along with the feed direction. The separation of the tool and workpiece can be realized under some certain conditions although the cutting speed exceeds far away from the critical speed of the traditional UVC and EUVC methods. As a consequence, it realized high speed cutting on a macro level and intermittent cutting in the micro, and improved the machinability of titanium alloy. Firstly, a theoretical model of HUVC process was established and both of the separation criteria and the duty cycle of HUVC were fully analyzed. Then the feasibility of HUVC method for cutting Ti-6Al-4 V was verified experimentally compared with conventional cutting (CC) and traditional ultrasonic vibration cutting (UVC). The results demonstrated that tool life in HUVC were extended by 300% in an optimal situation due to the significantly tool wear reduction. Besides, the cutting efficiency increased by 90% compared with CC method obviously. Furthermore, significant cutting force reduction about 50% and better surface roughness improvement in a successive cutting process were also achieved. © 2017 Elsevier B.V.
Wang Y.-Z.,Beihang University |
Chen Y.-Y.,Beihang University |
Wang Z.-Q.,AVIC Harbin Dongan Engine Group Co. |
Wang G.-C.,AVIC Harbin Dongan Engine Group Co.
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | Year: 2017
To evaluate the residual stresses on the ground surfaces of gears made of carburized 18CrNi4A and improve the fatigue life, fully carburized specimens were prepared and tested by the split Hopkinson pressure bar(SHPB) method, achieving a series of stress-strain curves under several combinations of temperatures and strain rates. Then parameters of the Johnson-Cook (J-C) plasticity model were fitted and applied to a numerical model of a grinding process. The simulation result agrees well with the relevant test. © 2017, Editorial Department of Transaction of Beijing Institute of Technology. All right reserved.
Han L.,Beihang University |
Hong J.,Beihang University |
Ma Y.,Beihang University |
Dou M.,Avic Harbin Dongan Engine Group Corporation LTD.
ICRMS'2011 - Safety First, Reliability Primary: Proceedings of 2011 9th International Conference on Reliability, Maintainability and Safety | Year: 2011
Missile-engine is an important part of missile system and a crucial factor to form military battle effectiveness. Considering of the long-term stored and one-time expended characteristics of missile-engine, it is significant to study storage reliability assessment of missile-engine and determine the weak moment. For digging the potential storage life of missile-engine, a missile-engine storage reliability assessment to study the variation of storage life is launched. According to the characteristics of missile-engine, the storage reliability and reliable storage life can be used as its storage reliability evaluation index. This paper concentrates on missile-engine storage reliable assessment based on Bayesian approach, and it is useful for the new maintenance program. © 2011 IEEE.
Wang Y.-Z.,Beihang University |
Wang Y.-Z.,Chongqing University |
Wu C.-H.,Beihang University |
Gong K.,Beihang University |
And 3 more authors.
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science | Year: 2012
In order to analyze the transmission performance of face-gear in real working condition, a calculational approach for load equivalent error of alignment has been investigated with the purpose of analyzing the support system and tooth deformation of face-gear drives. Then, the equations of contact path of loaded tooth contact analysis have been established based on load equivalent error of alignment. For the purpose of analyzing the bearing contact, the curvatures of face-gear and pinion have been presented. Tooth contact deformation and bending deformation have been developed using elasticity and three-dimensional FEA. Loaded tooth contact analysis and contact stress have been considered to simulate the contact and meshing of the gear tooth surfaces and to calculate the evolution of load distribution, bearing contact, transmission errors, and contact stresses of the gear drive along the cycle of meshing. The performed research proves that the proposed loaded tooth contact analysis method can effectively solve the meshing characteristic problem of face-gear drives system. The results are illustrated with numerical examples. © IMechE 2012.
Wang T.,CAS Shenyang Institute of Metal Research |
Song B.,AVIC Harbin Dongan Engine Group Co. |
Hua W.,CAS Shenyang Institute of Metal Research |
Gong J.,CAS Shenyang Institute of Metal Research |
Sun C.,CAS Shenyang Institute of Metal Research
Jinshu Xuebao/Acta Metallurgica Sinica | Year: 2011
Based on the orthogonal experiment, the effects of oxygen-fuel ratio and spraying distance on physical and mechanical properties of D-gun sprayed WC-Co coatings were investigated. An ideal coating with the uniform dense microstructures, high hardness and elastic modulus, and excellent wear resistance was obtained by technology optimization. The phase identifications and microstructure observation of the optimized WC-Co coating were conducted by XRD and SEM, respectively. The coating showed near-isotropic behaviors, which has been verified by the comparisons of mechanical and wear properties between cross section and surface. The mechanisms how the spraying parameters affected near-isotropic characters of the D-gun sprayed WC-Co coating were analyzed and discussed. © Copyright.
Dong G.,Harbin Institute of Technology |
Dong G.,Avic Harbin Dong An Engine Group Corporation Ltd |
Zhou M.,Harbin Institute of Technology |
Huang S.,Jiamusi University
Key Engineering Materials | Year: 2014
The conventional machining method for silicon nitride ceramics has low machining efficiency, prone to cracking, chipping and other defects. In this paper, the author carried out a study on the influence of ultrasonic vibration grinding on surface quality of silicon nitride ceramic, and carried out ultrasonic vibration grinding process test for silicon nitride ceramic and conducted the analysis of influence of this machining process on surface quality with orthogonal test. The test results showed that the influence on surface roughness decreased in the order of spindle speed, feed rate, cutting depth, and amplitude of vibration.
Li M.,China Academy of Aerospace Systems Science and Engineering |
Shang Z.,China Aerospace Science and Technology Corporation |
Wang R.,China Academy of Aerospace Systems Science and Engineering |
Li T.,AVIC Harbin Dongan Engine Group Co.
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2016
Attitude determination is an important part for Autonomous Underwater Vehicles (AUVs) to achieve their designed mission. This paper presents a novel attitude solution based on the hydrodynamic model. The hydrodynamic parameters can be calculated by the known hydrological parameters. Meanwhile, the pressure information of AUV's surface can be measured by the pressure sensor array. The attitude information can be solved based on the values above. In order to verify the effectiveness of the proposed method, a multi-sensor integrated system is designed. The hydrodynamic parameters are solved by the finite element method. The quaternion model and EKF are selected to estimate the attitude information. Simulation results demonstrate that the proposed method is effective to improve the accuracy of the attitudes. © 2016 IEEE.
Xiu J.-Q.,AVIC Harbin Dongan Engine Group Co. |
You Q.,Nanjing University of Aeronautics and Astronautics |
Shi Z.-Y.,Nanjing University of Aeronautics and Astronautics
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012
The vehicle loads to be identified as moving loads were mapped into a wavelet space, a continuous bridge under action of moving load was modeled with the wavelet finite element method (WFEM). Taking the scale function of wavelet as an interpolation function, an elemental transformation matrix was formed to realize the transfer from the wavelet space to a physical one. The moving load was identified with distributed acceleration data as measured dynamic responses, they were integrated into velocities and displacements. The large fluctuation could be avoided in analysis of time history with the dynamic programming method and regularization. The simulation validated the feasibility of the proposed moving load identification on a continuous bridge model using WFEM with fewer elements, furthermore the noise could be greatly smoothed with the first order Tikhonov regularization in identification.
Zheng X.,AVIC Harbin Dongan Engine Group Corporation Ltd.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012
Effect of annealing temperature on microstructure, mechanical properties and fatigue crack propagation rate of high-strength Al-4.2Cu-1.4Mg aluminum alloy were investigated. The microstructure and the precipitated phases were examined by metallographic microscope, scanning electron microscopy and energy spectrum analysis. The results show that with the annealing temperature increasing from 380°C to 440°C, the grain size of the T3 Al-Cu-Mg alloy plates is refined and the volume fraction of second-phases Al2CuMg and Al2Cu decrease gradually. As a result, the fatigue crack propagation rate has a decreasing tendency. Furthermore, with the intermediate annealing temperature increasing, the tensile strength of Al-Cu-Mg alloy decreases slightly and the elongation increases.