针对机械设计中零件模块化快速成型、零件特征辨识与装配困难的问题,借鉴工业4.0中端对端集成设计理念,以安全防护围栏的指向性设计与装配为研究对象,开发安全防护围栏智能设计与装配系统。该系统基于嵌入式机械通信协议(machine-to-mac...针对机械设计中零件模块化快速成型、零件特征辨识与装配困难的问题,借鉴工业4.0中端对端集成设计理念,以安全防护围栏的指向性设计与装配为研究对象,开发安全防护围栏智能设计与装配系统。该系统基于嵌入式机械通信协议(machine-to-machine,M2M),将零件快速成型与定点装配有机结合,采用程序驱动参数化方法和对象连接与嵌入(object linking and embedding,OLE)技术,将特征装配(FAT)与数据流链(DFC)结合判定零部件装配顺序,二维工作界面给定约束,在Solid Works中生成装配体模型,产生BOM列表,实现安全防护围栏快速设计与装配。展开更多
Mechanical properties and microstructures of Al-Li-Cu-Mg-Ag alloy after solution treatments were investigated by means of optical microscopy （OM）, tensile test, hardness measurement and electrical conductivity test,...Mechanical properties and microstructures of Al-Li-Cu-Mg-Ag alloy after solution treatments were investigated by means of optical microscopy （OM）, tensile test, hardness measurement and electrical conductivity test, differential scanning calorimetric （DSC）, energy dispersive X-ray （EDX）, scanning electron microscopy （SEM） and transition electron microscopy （TEM）, respectively The results show that both tensile strength and hardness increase first and then decrease with temperature at constant holding time of 30 min with maximum strength and hardness appearing at 520 ℃. Tensile strength, hardness and elongation of samples treated at 520 ℃ for 30 min are 566 MPa （σb）, 512 MPa （σ0.2）, HB 148 and 8.23% （δ）, respectively. There are certain amount of fine T1 （AI2CuLi） phase dispersing among AI substrates according to TEM images. This may result in mixed fracture morphology with trans-granular and inter-granular delamination cracks observed in SEM images.展开更多
文摘针对机械设计中零件模块化快速成型、零件特征辨识与装配困难的问题,借鉴工业4.0中端对端集成设计理念,以安全防护围栏的指向性设计与装配为研究对象,开发安全防护围栏智能设计与装配系统。该系统基于嵌入式机械通信协议(machine-to-machine,M2M),将零件快速成型与定点装配有机结合,采用程序驱动参数化方法和对象连接与嵌入(object linking and embedding,OLE)技术,将特征装配(FAT)与数据流链(DFC)结合判定零部件装配顺序,二维工作界面给定约束,在Solid Works中生成装配体模型,产生BOM列表,实现安全防护围栏快速设计与装配。
基金Foundation item： Project（6140506） supported by GAD （General Armament Department）, China
文摘Mechanical properties and microstructures of Al-Li-Cu-Mg-Ag alloy after solution treatments were investigated by means of optical microscopy （OM）, tensile test, hardness measurement and electrical conductivity test, differential scanning calorimetric （DSC）, energy dispersive X-ray （EDX）, scanning electron microscopy （SEM） and transition electron microscopy （TEM）, respectively The results show that both tensile strength and hardness increase first and then decrease with temperature at constant holding time of 30 min with maximum strength and hardness appearing at 520 ℃. Tensile strength, hardness and elongation of samples treated at 520 ℃ for 30 min are 566 MPa （σb）, 512 MPa （σ0.2）, HB 148 and 8.23% （δ）, respectively. There are certain amount of fine T1 （AI2CuLi） phase dispersing among AI substrates according to TEM images. This may result in mixed fracture morphology with trans-granular and inter-granular delamination cracks observed in SEM images.
