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一种滚压车门用热塑性弹性体导槽密封条防窜动设计

2020-10-21胡侠周致宏周瑛

汽车实用技术 2020年11期

胡侠 周致宏 周瑛

摘 要:为了解决乘用车用热塑性弹性体导槽密封条装车后,在环境交变情况下摇窗机升降耐久后产生的窜动问题,文章研究了窜动产生的三种原因:玻璃对导槽密封条的拉动力偏大、导轨与导槽密封条之间的摩擦力偏小、无物理定位结构。并从此三种原因着手,给出了对应的解决措施,并结合CAE分析保障了设计准确性。经过零件耐久、系统耐久、整车耐久试验证明此方案非常有效的解决了导槽密封条环境交变耐久后的窜动问题,给后续热塑性弹性体类导槽密封条在乘用车中的应用提供了有效的防窜动解决方案。关键词:乘用车;热塑性弹性体;导槽密封条;防窜动中图分类号:U467  文献标识码:B  文章编号:1671-7988(2020)11-39-03

Abstract: To Solve the movement of TPV glass run channel seal when lifting durability test of window lifter in case of environmental change on vehicle, we researched three factors causing the issue: the pull of glass on glass run channel seal is too big, the fricton between channel and glass run channel seal is too small, there is no fix structure between  channel and glass run channel seal. So we start to study these three factors, and provided corresponding solutions. In the process of research, we used the CAE analysis to improve the accuracy of design. The part durability test, system durability test and vehicle durability test show that these methods are very effective. It provides an effective prevention movement solution for the application of TPV glass run channel seal on vehicle.Keywords: Vehicle; TPV; Glass Run Channel Seal; Prevent MovementCLC NO.: U467  Document Code: B  Article ID: 1671-7988(2020)11-39-03

前言

由于热塑性弹性体(TPE)兼具塑料的可塑性和橡胶的弹性,是近年来应用在乘用车上越来越广泛的一种高分子材料。其中的TPV是目前汽车上使用量最大的热塑性弹性体。其可回收、生产工序少、节能环保、轻量化、耐磨性好的特点,使其在乘用车的导槽密封条上得到越来越多的应用。但TPV也有其固有的缺点:压缩永久变形大、回弹性差、环境交變的线性收缩率大等。虽然近年来TPV材料的性能一直在进步,但目前以上这几点性能仍低于传统的EPDM材料。

这些缺点导致其应用于导槽密封条时,在经过环境交变中的摇窗机升降耐久后出现导槽密封条立柱段在窗框中发生向上窜动,顶部在窗框内发生线性收缩,向中间窜动的问题。……

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