Beijing Xinghang Mechanical Electrical Equipment Co.

Beijing, China

Beijing Xinghang Mechanical Electrical Equipment Co.

Beijing, China
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Jin H.,Yanshan University | Liu D.,Yanshan University | Yu B.,Yanshan University | Fan X.,Beijing Xinghang Mechanical Electrical Equipment Co.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2017

The accurate posture of spacecraft cabins in the assembly spaces should be determined in the spacecraft assembly production. Taking cylinder class spacecraft cabin structure as an example, a vector posture solving method was proposed to realize the accurate solution of cabin's postures. By laying reasonable feature points on the cylindrical surfaces of cabins, the position vector of origin of body-fixed coordinate system of cabins in the assembly space was solved using the damped least square method. The rotation matrix of body-fixed coordinate system of cabins was solved combined with the space cylindrical surface equations, and then the six pose parameters of cabin were obtained. The numerical simulation was conducted on the cabin using the proposed method and the simulation results show its validity and accuracy. © 2017, Chinese Mechanical Engineering Society. All right reserved.


Hua L.,Beihang University | Liu J.-H.,Beihang University | Li S.-M.,Beihang University | Yu M.,Beihang University | And 2 more authors.
International Journal of Minerals, Metallurgy and Materials | Year: 2015

The effects of insoluble eutectic Si particles on the growth of anodic oxide films on ZL114A aluminum alloy substrates were investigated by optical microscopy (OM) and scanning electron microscopy (SEM). The anodic oxidation was performed at 25°C and a constant voltage of 15 V in a solution containing 50 g/L sulfuric acid and 10 g/L adipic acid. The thickness of the formed anodic oxidation film was approximately 7.13 μm. The interpore distance and the diameters of the major pores in the porous layer of the film were within the approximate ranges of 10–20 nm and 5–10 nm, respectively. Insoluble eutectic Si particles strongly influenced the morphology of the anodic oxidation films. The anodic oxidation films exhibited minimal defects and a uniform thickness on the ZL114A substrates; in contrast, when the front of the oxide oxidation films encountered eutectic Si particles, defects such as pits and non-uniform thickness were observed, and pits were observed in the films. © 2015, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.


Wang J.,Tsinghua University | Wang J.,Beijing Key Laboratory of Precision Ultra precision Manufacturing Equipments and Control | Feng P.,Tsinghua University | Feng P.,Beijing Key Laboratory of Precision Ultra precision Manufacturing Equipments and Control | And 3 more authors.
Ceramics International | Year: 2016

Mechanical-machining-induced tearing defects at hole exits restrict the application of C/SiC composites. Rotary ultrasonic machining (RUM) is suitable for hole manufacture in brittle composites, providing reduced tearing size as compared with conventional grinding. Even so, substantial tearing defects at the hole exit remain with RUM. In this study, a novel compound step-taper diamond core drill for RUM of C/SiC was developed to further improve the hole exit quality. Contrastive machining tests were conducted to evaluate the effectiveness of the new type drill. Experimental results show that the compound drill can help reduce the tearing size by 30% on average. Results of variance analysis indicate that there is little dependency of tearing size on processing variables with the compound drill, whereas the common drill shows substantial dependence. Detailed observation of the thrust force reveals that the tearing size reduction using the compound drill is due to the reprocessing effects of its taper face. In the reprocessing process of the taper face, the thrust force gradually decreases at the hole exit. Increasing the ultrasonic amplitude can help further improve the hole exit quality when using our compound drill. © 2016 Elsevier Ltd and Techna Group S.r.l.


Feng P.,Tsinghua University | Wang J.,Tsinghua University | Wang J.,Beijing Key Laboratory of Precision Ultra precision Manufacturing Equipments and Control | Zhang J.,Tsinghua University | And 2 more authors.
Ceramics International | Year: 2016

Drilling induced tearing defects at the hole exit restrict the reliability of C/SiC production. In this study, the drilling induced tearing defects in rotary ultrasonic machining of C/SiC composites were investigated quantitatively. The mechanism of tearing defect formation was studied through the detailed observation of thrust force. Experimental results indicate a positive dependence of tearing defect on the thrust force. A larger thrust force corresponds to a larger drill displacement during the formation process of tearing defect, resulting in larger tearing defect. RUM can averagely reduce the tearing defect at the hole exit more than 60%. Tearing defects can be further reduced by increasing the spindle speed and the ultrasonic amplitude, or decreasing the feed rate. © 2016 Elsevier Ltd and Techna Group S.r.l.


Dong Z.,Harbin Institute of Technology | Zhang W.,Harbin Institute of Technology | Zheng L.,Harbin Institute of Technology | Jiang T.,Beijing Xinghang Mechanical electrical Equipment Co. | And 5 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2015

Diamond array was braze welded on the stainless steel substrate which was processed applying femtosecond and nanosecond laser pulses with pulse duration 40 fs and 5 ns, respectively. The threshold of diamond processed using femtosecond and nanosecond laser pulses was deduced by measuring the relationship between fabricated area and laser power. The processing results show that the threshold of diamond processed by femtosecond laser pulses is lower compared with that processed by nanosecond laser pulses. The morphology of the processed region using differentkinds of laser sources was also compared with microscope. The processing of diamond applying femtosecond was confirmed more effective than that using nanosecond pulses. ©, 2015, Chinese Society of Astronautics. All right reserved.


Dong Z.,Harbin Institute of Technology | Zheng L.,Harbin Institute of Technology | Jiang T.,Beijing Xinghang Mechanical Electrical Equipment Co. | Zhao X.,Harbin Institute of Technology | And 5 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

In order to confirm the feasibility of carbon fiber processing using lasers, the processing of carbon fiber blocks using femtosecond and continuous laser sources was researched. The morphologies of the processed region applying femtosecond and continuous laser sources were investigated. Compared with the processing using continuous laser, the optical processing of carbon fiber blocks using a femtosecond laser with pulse duration of 40fs is efficient and the processing quality is excellent with the edge of the processed region quite smooth. The threshold of processing using femtosecond pulses was deduced to be in the level of 1012 W/cm2 by investigating the radius of processed region with different laser power. The experimental results prove that the optical processing of carbon fiber blocks is feasible. ©, 2014, Editorial Office of High Power Laser and Particle Beams. All right reserved.


Li X.P.,Beijing Institute of Technology | Xu C.G.,Beijing Institute of Technology | Liu Z.,Beijing Xinghang Mechanical Electrical Equipment Co. | Xu H.H.,CAS Institute of High Energy Physics
Applied Mechanics and Materials | Year: 2013

The curved structural plate components have been widely used in petroleum, natural gas, chemical industry, and other industries fields, monitoring and detecting the curved structural plate components' flaw has a great significance for improving the component's integrity, reliability and lifespan in service. Based on the elastic wave fundamental theory, elastic wave equations, and phase velocity dispersion characteristic curves in curved plate component, the article gives the phase velocity practical detecting method. By using the comsol finite element software, the author proposed a wave propagating forward modeling analytical method, which gives a guidance to study the relationship between the wave and the flaw. By adopting the ellipse algorithm, the article proposed a positioning and imaging method which was used to locate the flaw's position and distinguish the flaw's direction. Based on the theoretical and technical analysis above, a number of experiments has been done, and the results shows that the detecting and imaging method can locate and image the flaw's position and its geometrical morphology precisely for the curved plates flaw detecting. © (2013) Trans Tech Publications, Switzerland.


Guan B.,University of Science and Technology Beijing | Zang Y.,University of Science and Technology Beijing | Chen B.,University of Science and Technology Beijing | Ye S.,University of Science and Technology Beijing | And 2 more authors.
Journal of Computational Methods in Sciences and Engineering | Year: 2015

This paper discusses the important role of human-computer interaction in computer aided inspected points planning process, and put forward the technical requirements of inspected points planning system must have in order to achieve the full capacity of human-computer interaction. Using second-development platform of UG, we designed a framework of computer aided inspected points planning system which can fully carry out human-computer interaction. Then we proposes two planning strategy which can fully meet the human-computer interaction requirements. © 2015 - IOS Press and the authors.

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