基于预变形的静态抗凹性模拟分析

本文用ABAQUS准静态算法对基于胀形预变形试件的静态抗凹性进行了模拟 ,分析了预变形量及板材类型对静态抗凹性能的影响 ,为用数值模拟方法预测和评定覆盖件的抗凹性能积累了可用的经验     

Shaped Charge Optimisation against Bulging Targets

Equivalent to the results against explosive reactive armour sandwiches also bulging armours can be better defeated by high performance precision shaped charges compared to so‐called robust shaped charges. The shaped charges with larger liner angles or thicker liners have less jet tip velocities which results in less residual penetration capabilities.     

低压接管管线膨胀开裂原因分析

某低压乙二醇接管管线在运行过程中膨胀开裂。对爆管进行了宏微观检验、化学成分分析和厚度测试。结果表明，由于管段受到较大压力的作用，使管段产生较大的塑性变形，随着塑性变形的增大首先在接管焊缝热影响区的部位产生断裂破坏，最终导致爆管。提出了预防措施。     

圆钣自由胀形过程的回弹分析

本文建立了圆钣自由胀形过程的回弹理论公式，试验证明该公式成功地揭示了工件的稳定相对ｈｐ以及与材料性能有关的材料综合性能指数Ａ、Ｂ对回弹的影响规律。     

Control of mold level in continuous casting based on a disturbance observer

Regulating molten steel level in continuous casting is difficult because it suffers from various disturbances, among which the bulging disturbance is the most prominent. Moreover, as the casting speed increases in continuous casting, the phase lag due to the system delay increases. To eliminate the bulging disturbance in the presence of system delay, we propose an adaptive sine estimator based disturbance observer and a phase lead adaptive fuzzy controller. We tested the proposed method using a 1:1 scale hardware simulator and confirmed that the method successfully decreased the bulging disturbance effect from the molten steel level.     

Hydromechanical deep-drawing of aluminum parabolic workpieces—experiments and numerical simulation

Aluminum parabolic workpieces were formed with hydromechanical deep-drawing technology. The deep-drawing process was analyzed by using the explicit finite element method with various process parameters. Defects of wrinkling and rupture are predicted for some forming conditions, and the thickness distribution results are in good agreement with the experimental results. Thinning mainly takes place during the first third of the punch travel, while wrinkling mainly takes place during the final half-stage of the punch travel. The effects of chamber pressure and blank holding force on the deformation of the workpieces are discussed. The numerical results are compared with those obtained in the experiments.     

基于胀形基础上的多工序翻孔工艺的研究

翻孔是冲压加工中常用的一种工艺方法，通常翻孔由于材质、孔的直径及模具结构等方面的原因，使翻孔后零件的竖边高度受到限制，文章讨论了将胀形工艺和翻孔工艺组合起来，以增加翻孔高度、改善工艺过程。     

茶壶橡胶胀形工艺及模具设计

文中分析比较了茶壶新旧两种成形工艺，叙述了橡胶胀形加工的优点，对毛坯尺寸及胀形力进行了计算，介绍了铝合金茶壶橡胶胀形模具结构。     

A System of Process Models for Estimating Parameters of Continuous Casting Using Near Solidus Properties of Steel

The quality of a continuously cast product depends on the process condition, which, in turn, depends on process parameters. To be able to set the correct parameter values, it is important that behavior of the steel being cast under different casting conditions is well understood. This will need the knowledge of the mechanical behavior of steels at temperatures near the solidus. This paper presents, in detail, how these properties were modeled as a function of steel grade, temperature, and stresses that arise during casting. These models have been used to develop an integrated system that is capable of simulating various process conditions that may be encountered during continuous casting. The details of how these models were developed, verified, and used to develop the integrated system are presented in this paper.     

关于连铸机铸坯压和重引拔压的设定计算方法

液压系统向连铸机升降驱动辊供给的液压压力应根据工艺要求进行设定计算。本文分析了铸机正常工作时驱动辊的压下力与铸坯内部的鼓肚力的关系，鼓肚力的动态变化要求驱动辊的压下力能较好地逼近这种变化。文章提出了驱动辊对铸坯的液压压力的计算步骤和方法，并且就处理滞坯的重引拔液压压力的确定方法作了介绍。