斜面摇杆压力机的工作原理及性能分析

一、简况斜面摇杆压力机是一种具有新的工作原理的锻压设备。近五年来我们一直对该种压机的工作原理进行了理论分析,制作铁木结构的模型进行测试,随后自制了一台80吨双斜面摇杆压力机(见图1),并在其上作了粉末压制及镦粗工艺试验,还较全面地对有关参数进行了测试。从一九七七年起为有关工厂设计了三台千吨以上的不同工艺用途的压机。其中由哈尔滨砂轮厂组织制造的1000吨人造金刚石压机(见图2),经过初步测试已投入试生产。一九七八年一月     

板坯磁脉冲成形系统几何参数对终态变形影响的有限元分析

讨论径向电磁力并建立其计算公式;通过铝板毛坯胀形过程的有限元模拟,分析了磁脉冲成形系统几何参数对终态变形的影响。分析结果表明,忽略径向电磁力是导致模拟变形场滞后于实际变形场的主要原因;采用高度大于宽度的矩形截面线圈可提高成形效率。     

Dynamic response of large increased pressure wind tunnel rotor-gear coupling system with parallel misalignment

To study the misalignment of gear coupling, this paper analyzed the distortion of the tooth of gear coupling on the base of gear coupling ＇ s motion under parallel misalignment, and derived the specific expression of additive radial force, which produced by the rotor＇ torque. The motion differential equations of the large in- creased pressure wind tunnel rotor-gear coupling system were derived by the finite element method. Newmark integral method was applied to calculate the dynamic response of the system with parallel misalignment. The nu- merical results show that： under the effect of additive radial force, the static misalignment can arouse 2X frequency component lateral vibration; the dynamic misalignment can arouse2X,4X,6X multiple frequency components lateral vibration. The 2X frequency component is obvious. The additive radial force of the gear coupling can arouse lateral vibration with even multiple frequency components.     

基于虚拟设计制造技术的大型风洞设备开发

FL-9低速增压风洞是"十五"国家批准建设的大型航空基础设施,以其开发研制为背景,运用制造业信息化技术,构建了大型风洞设备的虚拟设计制造平台.此平台具备网络系统支持下的设备三维数字化设计、计算机辅助分析、计算机辅助工艺设计、可视化及三维交互等功能.并建立了风洞设备设计制造信息化体系,实现了设计制造全过程信息分类代码的规范和统一.基于此平台开发的FL-9低速增压风洞经5年的研制已全面建成并首次试车成功.