As the important parts of continuous extrusion forming, validation of forming load on tool and die is the key of their design. 作为连续挤压成形零件的模具、挤压轮及堵头所受的成形力分析是其进行结构设计的关键。
Application of BP Neural Network to Predict the Extrusion Load and Exit Temperature Evolution during Extrusion Process 基于BP神经网络的挤压力与挤压出口温度预测研究
Warm Extrusion Forming Technology with Multi-direction Load and Die Design for Abnormal-axes 轴向加速器,序列式增压器异形轴多向加载温挤压成形工艺及模具设计
The production mechanism of the surface residual stress producing in grinding process is the combined effect on extrusion stress and the cutting stress and the thermal load. 在磨削加工过程中产生表面残余应力,其产生机理是磨粒刃作用引起的挤压应力和切削应力及热应力的综合作用效应。
Structural Safety Performance Test of the Half-height Automatic Platform Gates Under the Simulative Wind Load and the Crowd Extrusion Load 半高式屏蔽门在模拟风压荷载及人群挤压荷载作用下结构安全性能测试
The influence of frication factor and extrusion speed to load has been analyzed. 并通过模拟分析了摩擦因子和挤压速度对成形载荷的影响。
The results indicate that the horizontal component of reaction force from the die wall increases with the angle ψ, which is helpful for the deformation of billet. Consequently the extrusion load decreases with angle ψ. 结果表明:随着ψ角的增加,通道壁支反力的水平分量随之增大,有助于试样的变形流动,从而降低挤压载荷的大小;
How to choose critical extrusion load value is discussed according to the shearing force of bridge bearing caused by various load cases, such as wind, vehicle and earthquake. 根据风、行车和地震荷载等各种工况可能引起的支座剪力值,提出了铅挤压阻尼器临界滑移荷载值的确定方法。
From the proposed velocity field, the upper bound extrusion load and average extruded height for regular polygonal shaped billets are determined with respect of the chosen parameters. 被提出的速度场中,规则多边形的上限挤压载荷和平均挤压高度决定于被选择的参数。
The equal channel angular extrusion ( ECAE) process of pure aluminum was simulated with finite element method. The influence of the curvature angle ψ of the outside corner on the extrusion load and the deformation uniformity was discussed. 运用有限元方法对纯铝的等径弯角挤压(ECAE)过程进行了模拟计算,探讨了挤压通道外接圆弧角ψ对挤压载荷及试样变形均匀度的影响。
In the experiment of apricot stone's extrusion cracking, the parameter of cracking load and its compress variation which influence apricot stone's cracking has been measured. 本文通过新疆杏核挤压破壳试验,测定了影响杏核破壳的破坏载荷及其压缩变形量等参数;
The relations, such as the tensile strength of extrusion products to extrusion ratio and contents of powder strengthen materials, the practical load of powder extrusion to contents of powder strengthen materials, extrusion ratio and extrusion velocity, were given by this dissertation. 论文给出了实验过程中挤压制品的抗拉强度与挤压比、颗粒增强材料含量之间的关系,粉末挤压所需的实际挤压力与颗粒增强材料含量、挤压比、挤压速度之间的关系等。
Uniform Wearing Optimum Design of Extrusion Die Profile The object is to yield more uni-form surface& load distribution on die profile Surface. 以表面载荷沿凹模型腔轮廓表面均匀分布为目标,建立了优化数学模型,对挤压模具型腔轮廓形状进行了优化设计。
In what concerns the extrusion load curve results demonstrate that it can be predicted more accurately using a combined Eulerian-Lagrangian finite element formulation. 挤压弯曲载荷的分析结果显示,用合并欧拉-拉格朗日有限元公式能够更准确的预测金属的形变过程。
By analyzing the simulation results, the porthole-expanding die not only reduce the load of extrusion but also produce the alloy profile more wider than round extrusion chamber, and the streamline die can reduce the load of extrusion effectively. 通过模拟分析的结果可以看到,在分流孔中进行宽展不仅降低了因为单独使用宽展模具而增加的挤压力,而且可以挤压比圆挤压筒直径更宽的壁板型材。
According to the phenomena of fatigue damage, the extrusion stress concentration factor at the position which is vertical to the overall load direction is acquired by a modification to the factor at the maximum stress position given in the stress severity factor approach. 按照连接件疲劳破坏现象,将SSF法中的挤压应力集中系数从最大应力位置处修正到了垂直于总体载荷方向处,并给出了修正后的挤压应力集中系数Ktb拟合公式。
This is because the whisker rotated during the extrusion process, resulting in directional arrangement, which can bear the load better and improve the performance of the material. 这是由于复合材料在挤压过程中,晶须发生转动,导致其定向排布,从而可以更好的承担载荷,提高了材料的性能。
With increasing the friction coefficient, the maximum extrusion load is enhanced, while the effective strain at the bottom of the sample also is increased. 摩擦系数越大,最大挤压载荷明显增加,试样下表面区域的等效应变增加。
Large-sized particles crack more easily during extrusion and tensile testing, and the fractured particles cannot withstand tensile load, but can endure indentation load. ( 4) The SiC particles distribute more uniformly in the matrix with increasing the mixing time. 大尺寸的SiC颗粒在制备和挤压过程中易发生断裂,断裂的SiC颗粒可以承受压痕载荷,但不能承受拉伸载荷。(4)混料时间增加,SiC颗粒分布均匀度增加。
In addition, aiming at reducing extrusion power, the forming process optimization is carried out, from which the best container length with the less extrusion load is got. 以降低挤压能耗为优化目标,对成形过程进行优化,获得最低能耗下的型腔高度。