The Chengdu Aircraft Industry Group or Chengdu Aerospace Corporation, a subsidiary of AVIC, is a Chinese aerospace conglomerate that manufactures aircraft parts as well as designs and manufactures combat aircraft. It was founded in 1958 in Chengdu, Sichuan province, China to be a supplier of aircraft for the Chinese military.The Chengdu Aerospace Corporation designed and now produces the Chengdu J-10B medium-weight multi-role fighter that is considered to be one of the most advanced in China's inventory, as well as the FC-1 / JF-17 light-weight multi-role fighter that is produced in cooperation with Pakistan. Wikipedia.
Li Y.G.,Nanjing University of Aeronautics and Astronautics |
Ding Y.F.,Nanjing University of Aeronautics and Astronautics |
Mou W.P.,Chengdu Aircraft Industrial Co. |
Guo H.,Changzhou Institute of Technology
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture | Year: 2010
A feature-recognition method based on an holistic attribute adjacency graph is put forward to solve the problems that complex features of aircraft structural parts find difficult to recognize by traditional feature-recognition methods. Extending the attribute's information and adding node types based on a traditional attribute adjacency graph, the method not only represents freeform surfaces and edge features, but also describes geometric information of topology elements precisely and completely. Combining feature recognition based on a graph with that based on hint, the method can deal with feature recognition of freeform surfaces, edge features, intersecting features, and convex features by a uniform algorithm, which virtually performs hint search, hint extension, and feature combination with hints of seed faces. According to the research, an original system has been used in a numerically controlled machining process of integer frame parts in certain large aviation enterprises.
Liu J.,Beihang University |
Zhang D.,Beihang University |
Qin L.,Chengdu Aircraft Industrial Co. |
Yan L.,Beihang University
International Journal of Machine Tools and Manufacture | Year: 2012
Carbon fiber reinforced plastics (CFRP) are used for various aircraft structural components because of their superior mechanical and physical properties such as high specific strength, high specific stiffness, etc. However, when CFRP are machined, rapid tool wear and delamination are troublesome. Therefore, cost effective and excellent quality machining of CFRP remains a challenge. In this paper, the rotary ultrasonic elliptical machining (RUEM) using core drill is proposed for drilling of holes on CFRP panels. This method combines advantages of core-drill and elliptical tool vibration towards achieving better quality, delamination free holes. The cutting force model and chip-removal phenomenon in ultrasonic elliptical vibration cutting are introduced and analyzed. The feasibility to machine CFRP for RUEM is verified experimentally. The results demonstrate that compared to conventional drilling (CD), the chip-removal rate has been improved, tool wear is reduced, precision and surface quality around holes is enhanced, delamination at hole exits has been prevented and significant reduction in cutting force has been achieved. © 2011 Elsevier Ltd All rights reserved.
Sun Y.,Shandong University |
Sun J.,Shandong University |
Li J.,Shandong University |
Xiong Q.,Chengdu Aircraft Industrial Co.
International Journal of Advanced Manufacturing Technology | Year: 2014
An investigation was reported on the cutting temperature in milling Ti6Al4V by applying semi-artificial thermocouple. ANOVA was conducted on the experimental results, and regression models were obtained. Analysis results showed that the tool temperature and workpiece temperature performed a similar rising trend with the increase of cutting parameters, including cutting speed, feed rate, radial feed, and axial feed. And their influence degrees decreased successively. The cutting force with different cutting parameters was also measured, and the relationship between cutting temperature and cutting force was discussed. It was found that cutting temperature and cutting force obtained in the experiment had the same fluctuation feature. Therefore, the cutting force and cutting temperature could complement each other for monitoring and analysis of the cutting process. © 2013 Springer-Verlag London.
Han X.,Chengdu Aircraft Industrial Co. |
Tang L.,Chengdu Aircraft Industrial Co.
International Journal of Machine Tools and Manufacture | Year: 2015
Pocket corner is the most typical characters of aerospace structure components. To achieve high-quality product and stable machining operation, manufacturer constantly seek to control the cutting forces in pocket corner milling process. This paper presents the cutting force in corner milling considering the precision instantaneous achievements of tool engagement angle and undeformed chip thickness. To achieve the actual milling tool engagement angle in corner milling process, the details of tool-corner engagement relationship are analyzed considering the elements of tool trajectory, tool radius, and corner radius. The actual undeformed chip thicknesses in up and down milling operations are approached on account of the trochoid paths of adjacent teeth by a presented iteration algorithm. Error analysis shows that the presented models of tool engagement angle and undeformed chip thickness have higher precision comparing with the traditional models. Combined with the cutting force coefficients fitted by a series of slot milling tests, the predicted cutting force in milling titanium pocket with different corner structure and milling parameters are achieved, and the prediction accuracy of the model was validated experimentally and the obtained predict and the experiment results were found in good agreement. © 2014 Elsevier Ltd. All rights reserved.
Huang R.,Chengdu Aircraft Industrial Co.
Nanjing Hangkong Hangtian Daxue Xuebao/Journal of Nanjing University of Aeronautics and Astronautics | Year: 2010
The default pressure control algorithm for commercial software MARC is improved. The improved algorithm can limit the deformation rate based on the average strain rate of the elements with the 20 highest strain rates in superplastic forming. Pressure cycles are obtained and the finite element analysis is performed for a complex TC4 box-shaped part. The complex TC4 box-shaped parts are manufactured. The predicted profile is in agreement with that of the strain rate control algorithm and the measured thickness distribution. Thus, the better thickness distribution uniformity of the formed part is improved on the modified pressure cycle.