异辛酸磁力传动高温反应釜的设计

简述磁力传动在反应釜中的应用原理及设计方案,针对异辛酸磁力传动高温反应釜的设计实例,指出了在设计、制造、安装和调试中应注意的关键性技术问题,并提出了建设性的意见及其未来的发展方向.     

大间隙冲裁对模具寿命的影响

对大间隙冲裁与冲件断面质量、模具磨损的影响进行了分析，并提出了提高模具寿命的具体方法。     

The planar contact problem of interaction between a rigid heat-conductive cylindrical die and an elastic layer in frictional heat emission

The paper presents discussion of a new planar problem of contact interaction between a rigid heat-conductive die of circular cross section and an elastic layer. The apparatus of integral transformation is used to obtain a precise solution of the nonstationary equations of heat conductivity for the layer and the cylindrical die. This method makes it possible to reduce the formulated problem to a system of integral equations with time-variable limits of integration; the structure of the equations is governed by the type of thermophysical conditions on the interaction surface. An algorithm is advanced for solving this type of integral equation; the variations in time of the contact pressure and the interaction area boundaries are explored. Thus, it is possible to make the problem’s mathematical formulation closer to the real distribution of thermoelastic stresses and to estimate more accurately the effect of temperature fields on the value and pattern of the contact-pressure distribution.     

组合压力模在铝包钢丝生产中的使用

介绍组合压力模在铝包钢丝拉拔中的使用 ,讨论压力套管与压力模的结合方式 ,结果显示通过改进压力套管可提高生产效率、成材率、产品质量 ,降低辅料消耗     

发动机后悬支架成形工艺及模具设计

着重论述了工艺分析在模具设计中的重要性，阐述了造成工件起皱断裂的原因，通过改变冲压工序来解决这个问题，并介绍了模具设计中各种参数的选择和模具结构。     

Three-dimensional rigid–plastic finite element analysis of non-steady-state shaped drawing process

In this paper, non-steady-state shaped drawing processes have been investigated by using the three-dimensional rigid–plastic finite element (FE) method. In order to analyze the shaped drawing process, a method to define a straight converging die by considering a straight die part, a die radius part and a bearing part has been proposed. In addition, the modeling of the initial billet and the generation procedure of the mesh system have been suggested. The three-dimensional rigid–plastic FE simulation has been performed for a square sectional drawing process and its validity has been confirmed by comparison with existing experimental results. Under the same process conditions, the effect of perimeter ratio and drawing stress in the shaped drawing process has been investigated. Also, the effects of process variables, such as the reduction in area and semi-die angle, on drawing stress and corner filling in the drawing process of a square rod from a round bar have been investigated by using the rigid–plastic FE code developed. In order to investigate corner filling, the diagonal ratio is calculated and compared with the results of the FE simulations. Furthermore, limits of the process variables are determined by considering bulging and necking. From the results, an optimal process condition satisfying reasonable corner filling and a minimum value of drawing stress is suggested.     

连续包覆型腔内应变分布的三维光塑性实验研究

以聚碳酸酯为模型材料, 首次采用三维光塑性方法对连续包覆型腔内金属流动过程进行了模拟实验研究,给出了稳态变形阶段型腔内的三维应变分布。分析了型腔内应变分布的特点,给出了金属在型腔内的流动规律     

冰箱内胆冲孔切边模设计

分析了冰箱内胆安装孔的特点与制作工艺,介绍了冰箱内胆冲孔切边模的结构和设计要点,采用模块化设计,缩短了模具设计时间,提高了设计质量。实践验证:模具结构设计合理,工作平稳、可靠。     

阀体压铸模设计

根据阀体零件的结构特点和技术要求，介绍了模具设计的过程和设计要点。并重点介绍了阀体的工艺性、分型面的选择、内浇口位置的确定、压铸机的选择等内容。     

冷冲压模具故障浅析

介绍了冷冲压模具工作过程中常见的故障,分析了造成故障的内在原因,探讨减少和避免各类问题的工艺方法。该文对生产实践中同类问题的解决具有一定的借鉴作用。