宽凸缘薄壁不锈钢筒形件拉伸级进模设计

对宽凸缘薄壁不锈钢筒形件进行了成形工艺分析。采用的连续拉伸工艺,减少中间退火工序,大大提高生产效率;模具结构采用圆锥形凹模与平凹模相结合的方法,避免拉伸起皱和断裂现象。     

连续拉伸模圆角半径的确定

分析了连续拉伸模圆角半径变化对拉伸工艺影响,在理论分析和生产实践基础上提出了一种较好的简便计算凸、凹模圆角半径公式,并进行实例应用计算。     

阀座液态模锻工艺分析

分析了液态模锻工艺特点。通过高压气瓶阀座液锻成形的工艺过程分析和模具结构设计,验证了液锻生产既可保证锻件质量,又具有高的生产率,能满足大批量生产要求。     

Unsteady transverse injection of kerosene into a supersonic flow

A shadowgraph and a new fuel injection system were used to study kerosene transversely injected into a supersonic flow. High pressure and velocity of injection can be attained. The pressure time histories were detected in oil-line and the shadowgraphs of the flow field were obtained at different time-delays. The inflow stagnation pressure was varied to change the local flow speed in test section. The results indicate that kerosene jet exhibits deep penetration and four regimes appear clearly during the fuel jet atomization in a high-speed flow. The jet disintegration is caused by surface waves propagating along the jet surface, and the breakup point is located at the wave trough. The surface waves are dominantly generated by aerodynamic force. The jet shock is close to windward surface of the jet. The shock reflects on and transmits in duct boundary layers. In the case of unsteady injection, the shock structure is very complicated and different from that of hydrogen injection. The results of kerosene inj     

卡尔.费休滴定法测定润滑油中微量水

介绍了用卡尔．费休自动测定仪测定润滑油中微量水的方法，具有快速、准确等特点。     

两种宜于推广的动力学分析法

动力学分析法具有灵敏度高、方法简便快速等特点，近年在痕量物质分析中已被广泛应用。本文针对我省中小型化工企业众多的现状，介绍两种简便易行和经济的动力学分析法－－催化光度法和速差法。     

尿基复合肥中总氮含量的快速测定

用氯化钙作沉淀剂 ,消除磷酸根离子的干扰 ,用甲醛法测定复合肥中的总氮。介绍甲醛法分析氮的原理、操作步骤及计算方法 ,对于 2 0 10 10规格的复合肥 ,通过条件实验确定样品量和沉淀剂、硫酸、甲醛的适宜加入量。该法简便、快速、准确 ,加标回收率 97 5 %～ 10 3 3%     

复杂盒形件厚板拉深模具设计

分析了厚板盒形件容器支架零件的工艺,介绍了毛坯尺寸的确定,工艺参数的计算和模具结构设计特点.     

浅议呼石化公司扩能改造后汽油调和计算及工艺

呼和浩特石化公司扩能改造项目实施后,汽油调和组分及手段就将发生恒大的改变,本作者就公司扩能后的汽油调和做简要计算和讨论,提出了指导调和的建议。     

差速传动轮成形工艺分析与精冲模设计

分析了差速传动轮冲压成形工艺特点，设计了一副带氮气弹簧的复合精冲模具，并对精冲凸模结构和模具材料选用及热处理工艺进行分析，提出该副模具设计要点。