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感器测出；试验中的压边间隙通过放置于凹模与压边圈之间的调整垫片来调整. 图1 AZ31B镁合金差温拉深试验装置 Fig. 1 Non-isothermal drawing test device of AZ31B magnesium alloy 通常情况下,镁合金的加热方式有外部加热法和内部加热法两种方式.本研究采用内部加热法,即在压边圈和凹模内分别均布多根电热棒进行加热... kN,该计算值比实验值11.3 kN稍大,这主要是由于在拉深过程中,冲头与压边圈之间的摩擦力F充当了压边力的功能,对压边力起到加强作用,故作用于板料上的压边力实际应为外部施加压边力与摩擦力F之和. 表2 拉深工件实际参数 Table 2 Actual parameters of deep drawing workpiece 2.3 压边间隙和压边力联合控制对拉深......
ARTICLE J. Cent. South Univ. (2019) 26: 1619-1636 DOI: https://doi.org/10.1007/s11771-019-4117-4 Factors affecting thin coal seam shearer drum coal-loading performance by a model test method GAO... to study the pivotal factors’ influences on drum coal-loading rate using a model test method. The effects of the drum hub diameter, cutting depth, vane helix angle, drum rotation speed and hauling speed......
J. Cent. South Univ. (2016) 23: 3312-3321 DOI: 10.1007/s11771-016-3397-1 Model test to investigate failure mechanism and loading characteristics of shallow-bias tunnels with small clear distance LEI... of structural and stratum deformation induced by tunnel excavation; Micro- fracture surfaces are formed in the tunnel surrounding rock and extend deep into the rock mass in a larger density; Tensile......
Axial bearing behavior of super-long piles in deep soft clay over stiff layersZOU Xin-jun(邹新军), ZHAO Ming-hua(赵明华)(College of Civil Engineering, Hunan University, Changsha 410082, China)Abstract:In order to find out the bearing behavior of super-long piles located in deep soft clay over stiff layers around Dongting Lake, China, a test pile was first designed with the field loading test finished......
variation in the deep open-pit mine, of which the performance is interestingly high compared with that of the field test. This study lays a foundation to study the ventilation thermodynamic theory... nonlinear regression analysis method, an empirical model of the rock face temperature variation in the deep open-pit mine was developed, which fitted well with the field test. This temperature field......
值也是先升后降. 关键词:CSP工艺; 卷取温度; 深冲板; 组织; 性能; 织构; CSP process; coiling temperature; deep drawing sheet; microstructure; mechanical property; texture; [全文内容正在添加中] ......
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. 关键词:镁合金；筒形件拉深；应力解析；临界压边力 中图分类号:TG389 文献标识码:A 文章编号:1672-7207(2019)07-1551-07 Critical blank holder force of deep drawing process for magnesium alloy... alloy cylindrical parts during deep drawing were derived by using analytical stress formula and energy method. The theoretical analysis was verified by numerical simulation and experiment, and the safe......
and positioning control of deep-ocean ship–riser–equipment system: Deep-ocean test experiences for doing deeper [C]// Proceedings of 3rd International Deep-Ocean Technology Symposium. Beijing: International...J. Cent. South Univ. Technol. (2011) 18: 642-649 DOI: 10.1007/s11771-011-0742-2 Design and implementation of model test installation of heave compensation system of deepsea mining HU Qiong(胡琼)1......
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