齿环热精锻成形工艺参数优化及组合模具设计

针对某齿环热精锻成形材料利用率低、模具寿命短的问题,构建了齿环热精锻成形有限元模型,分析了齿环热精锻成形过程中金属塑性流动规律及各物理量的变化情况。其次,以避免齿环成形缺陷、提高材料利用率和降低最大成形载荷为目标,采用响应面法和灰狼优化算法优化了齿环的坯料尺寸、始锻温度和成形速度,并通过数值模拟仿真和工艺实验进行了验证。最后,设计了齿环热精锻成形组合凹模结构,通过数值模拟优化了组合凹模的过盈量,模具危险区域的最大主应力值降至945 MPa,改善了模具应力集中现象,有效避免了模具的早期失效。

法兰轴镦锻成形工艺及模具设计

介绍3307-6259汽车轴类件的镦锻成形工艺及模具设计,其能够有效地解决大法兰台阶轴的成形困难问题,克服普通模锻成形工艺上的不足,大大降低原材料的消耗,提高产品的组织性能。采用镦锻成形工艺与感应透热相结合,锻件成形良好,表面质量好,生产效率高,产品成本低,经济效益显著。

组合式双腔模压模具的设计及应用

介绍了一种短纤维/酚醛模压制品使用的组合式双腔模具的结构设计,进行了工艺试验并对制品性能进行测试。工艺试验结果表明,组合式双腔模具的温差不超过4℃,满足产品压制工艺要求;由于模具结构设计中采用压力平衡通道,保证了两个模腔内产品的成型压力一致。制品性能测试结果表明,组合式双腔模具模压制品各项性能与单个模具压制的产品相当,满足使用要求。组合式双腔模压模具在生产中应用有效提高生产效率和设备利用率,降低了产品的能耗。

Modular Fixture Assembly Model for Virtual Assembly Design

To support modular fixture assembly design in virtual environment,a multi-view based modular fixture virtual assembly model is proposed.Instead of squeezing all assembly related information into a single model,three complementary views of assembly model,element information,function and structure,and assembly relationship are proposed to be used.The first view contains the detailed element information,while the other two explicitly capture the hierarchical function relationships and mating relationships respectively.These views are complementary in the sense that each view only contains a specific aspect of assembly related information while together they include required assembly related information.The proposed assembly model is specialized to accommodate the features of modular fixture virtual assembly design and applied in our developed prototype system.