光学球罩真空吸附装夹结构设计

为了改善光学球罩表面加工过程中效率低、装夹繁琐等问题,课题组设计了一种针对光学球罩的真空吸附装夹结构。选用“2转动+1摆动+微量进给”的加工工艺对光学球罩的内外表面进行磨削和抛光,并设计了中空的转台结构;分析球罩装夹时所需要的真空负压并验证在此真空负压下球罩在加工过程中不会出现滑移;运用Workbench软件仿真球罩-装夹头模型在加工过程中的变形量。仿真结果表明:在相同参数下内装夹头模型的变形量大于外装夹头;作为装夹头材料,45钢抗变形效果优于铝合金;模型的变形量随磨削力的增大而增大;真空负压及砂轮尺寸对变形量影响较小。该研究有助于提高球罩表面加工的质量和效率。

面向精密面形零件磨料流光整加工的装夹工艺结构优化设计

在高速螺旋进给条件下光整加工长径比较大的精密轴类零件过程中,三爪卡盘夹紧零件时,易产生脱落、表面损伤,针对这一瓶颈问题设计了组合式和整体式两种装夹结构,并通过有限元仿真进行了工艺过程校核,研究结果表明整体式装夹结构较组合式装夹结构更能够满足零件装夹的可靠性。在此基础上对整体式装夹结构进行了参数优化和轻量化设计。实验结果表明,优化后的整体式装夹结构能够满足加工工艺要求、避免了表面损伤、确保了加工过程的稳定性。

经济型数控车床刀台功能的拓展与应用

介绍了经济型数控车床刀台功能的拓展与应用情况,结合对经济型CAK6136数控车床刀台刀具装夹结构的改进设计,实现了4工位刀台装夹5把刀具的功能,保证了柴油机惰轮轴的加工质量和生产节拍,详细介绍了自动加工中心孔车刀的对刀补偿程序指令。经过试切削生产后,缩短了对工件的加工时间,产品质量稳定。

模具的加热、保温与冷却

本文从模具的加热。

经济型数控车床刀台功能的拓展与应用

通过对经济型CAK6136数控车床刀台刀具装夹结构的改进设计,实现了4工位刀台装夹5把刀具的功能,保证了柴油机惰轮轴加工质量和生产节拍。

Entirety transformation mechanism and topological-type synthesis for heavy-duty gripping devices

Force closure and stability problems exist in heavy gripping devices.Based on a typical gripping device for forging operations, the workpiece and the gripping device are innovatively considered as a single mechanism in this paper,and its global topological configuration is obtained.The changing element method is used to establish the optimized topology geometry of the gripping device by decreasing the degrees of freedom of the gripping mechanism and improving the force closure performance. Therefore,a new idea for the innovative design of heavy-duty forging gripping devices is provided.As the effect of revolute joint friction on loading capacity of the gripping device cannot be ignored,a unified mechanical equation including friction in terms of the topological adjacency matrix is established to analyze the force closure performance and calculate the loading capacity.The conclusions are provided by experiments.