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Structure optimization of porthole die based on aluminum profile extrusion process numerical simulation WU Xiang-hong(吴向红)1, ZHAO Guo-qun(赵国群)1, LUAN Yi-guo(栾贻国)1, LOU Shu-mei(娄淑梅)1, MA Xin-wu(马... method is used to produce hollow aluminum profile. Due to the complexity of the porthole die structure and the material flow, it is very difficult to get ideal profile products with the firstly designed......
is cam rotation angle. The radius of curvature of the theoretical cam profile is expressed as [4] (A2) Fig. A1 Schematic of cam mechanism...J. Cent. South Univ. (2017) 24: 1817-1825 DOI: https://doi.org/10.1007/s11771-017-3590-x Improving cam profile design optimization based on classical splines and dynamic model XIA Bi-zhong(夏必忠), LIU......
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element model was developed to simulate the electric field in a 75 kA drained aluminum reduction cell. The current distribution and influences of the cathode inclination angle and anode-cathode distance (ACD) were studied. The results show that relatively large horizontal current density appears in the aluminum film, and the maximum value reaches 600 kA/m2. As the cathode inclination angle increases......
and significant effect on the increment of twist angle. Therefore, the twist angle has an increase of about 76%, which verifies the modified die structure. Key words: 6063 aluminum alloy; helical... extrusion process called helical profile extrusion (HPE), the friction in the die influenced the twist angle and the shape of the helical profile. Therefore, the die coating, the die structure......
Relationship between boundary misorientation angle and true strain during high temperature deformation of 7050 aluminum alloy HU Hui-e(胡会娥)1, YANG Li(杨 丽)1, ZHEN Liang(甄 良)1, SHAO Wen-zhu(邵文柱)1... solution treated 7050 aluminum alloy were conducted to different strain degrees (0.1, 0.4, 0.6 and failure) at 460 ℃ with the strain rate of 1.0×10-4-1.0×10-1s-1. The boundary misorientation angle......
J. Cent. South Univ. (2018) 25: 230-240 DOI: https://doi.org/10.1007/s11771-018-3732-9 A prediction method of rail grinding profile using non-uniform rational B-spline curves and Kriging model YANG... a prediction method of the rail grinding profile for a grinding train. As a worn rail profile is a free-form curve, the parameterized model of a rail profile is constructed by using the cubic NURBS curve. Taking......
J. Cent. South Univ. Technol. (2011) 18: 451-457 DOI: 10.1007/s11771-011-0717-3 Kinematical system of breadth cam profile design SHIN Joong-ho, LI Lin(李琳), YANG Hyun-dai, KWON Soon-man... solutions for breadth cam mechanism were presented. The main topics of the shape design for breadth cam was to calculate the coordinate at each contact point to determine the cam profile. The proposed......
