汽车雨刮接头开裂失效分析及设计优化

针对某车型雨刮接头开裂问题,综合分析了供应商生产过程、整车装配过程以及产品设计方面的原因,对相关方面的不足进行了改进,同时也为后续车型雨刮的选型、验证和问题解决提供了借鉴意义。     

La2／3Sr1／3MnO3单晶的本征低温电阻最小行为研究（英文）

摘要：为了阐明在锰氧化物多晶以及外延薄膜中存在的低温电阻极小值现象,对La2／3Sr1／3MnO3单晶样品的性质进行研究.该单晶样品是利用光学浮区生长炉,在氩气气氛中生长出的高品质晶体,系统研究了退火对La2／3Sr1／3MnO3单晶低温输运行为的影响.结果表明,在退火前样品存在的低温电阻极小值无论是c轴还是ab平面在退火后均消失,这一结果首次证明了在锰氧化物体系中存在的低温电阻极小是一种非本征的物理行为,与实验样品的制备工艺和存在于其中的非完整性具有较强的依赖性,并进一步证明自旋无序散射乃是传统体系出现低温电阻极小的主要原因.     

Magnetic properties of rare earth HoCrO_3 chromites

The temperature dependence of the magnetic properties was systemically studied by dc/ac magnetization and specific heat measurement for heavy rare earth HoCrO3 chromites.The results revealed the existence of complex phase coexistence and competitive magnetic behavior in HoCrO3 chromites.It was found that,in the region of higher temperature above 141.0 K,HoCrO3 behaved as a typical Curie-Weiss paramagnetic(PM).And in the region of low temperature,a novel magnetization behavior was observed with negative magnetization(diamagnetism-like) characteristics under an external field of 100 Oe and M-T curves exhibited two symmetrical branches for field cooling(FC) and zero field cooling(ZFC) modes.This behavior indicated the coexistence of canted antiferromagnetic(CAFM) and weak ferromagnetic(FM) phase.These also exhibited the existence of competition mechanism below characteristic temperature TN1=141.0 K and the magnetic order of Ho ion below 7.5 K.The current complex magnetization might be attributed to the interaction between paramagnetic Ho3+ moments and canted Cr3+ moments.     

基于PLC控制的汽油滤清器自动气密检测生产线设计

分析了汽油滤清器密封检测工艺的现状,为提高其生产效率和合格率,对其生产线进行自动化改造,主要涉及进料系统、输送系统、气密检测以及不合格品隔离等各关键过程,同时基于PLC在工业自动化中的优势,选用了松下电工的FP1-C40的PLC进行相关逻辑控制,最终实现了生产线的自动运行并对不合格零件进行有效隔离。