针刺汽车地毯热力塑性成形性能探析  

Study on the thermoforming formability of needle-punched car carpet

作　　者：郭志英[1] 张云青[1] 胡义兵[1] 孔啸[1] 龚杜弟 

机构地区：[1]上海交通大学模具CAD国家工程中心,上海200030 [2]上海汽车地毯总厂,上海201600

出　　处：《塑性工程学报》2006年第2期93-96,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50305020)。

摘　　要：从针刺汽车地毯高温力学性能和传热性能的实验研究入手,分析了材料种类、变形速率、变形方向和成形温度对地毯力学性能的影响特性,包括断裂强度、断裂延伸率、各向异性以及与温度的敏感性,在此基础上,为准确地描述地毯成形加工性能,探索性地提出了能体现温度、力学和传热学性能影响的地毯热力塑性成形加工性能的两类表征指标,即表现地毯高温塑性变形能力的决定性表征指标和反映地毯成形加工能耗和周期等的影响性表征指标,前者包含高温断裂延伸率、延伸率的温度敏感性和收缩率的温度敏感性,后者则包含高温断裂强度、力学性能的各向异性以及传热性能。The paper started with the experimental research of high-temperature mechanical property and heat transferring property for needle-punched ear carpet, The effect of material, deformation velocity, deformation direction and forming temperature on the mechanical property were analyzed, which included tensile strength, elongation at rupture, anisotropy, and the temperature sensitivity. Based on this, the token indexes to represent thermoforming formability was exploringly proposed to deserlbe the thermoforming formability of car carpet more accurately, which could consider the combined effect of temperature, mechanical and heat transferring property. The token indexes can be divided into two kinds. They are determined indexes and influence indexes. The former represented the ability for plastic deformation in high-temperature, and it consisted of rupture elongation at high temperature, the temperature sensitivity of elongation, and the temperature sensitivity of shrinkage. The latter reflected the processing energy consumption and processing cycle time, and it concluded tensile strength at high temperature, anisotropie mechanics and heat transferring property.

关 键 词：汽车地毯 热力塑性成形 成形性能 

分 类 号：U465.6[一般工业技术—材料科学与工程]