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Performance impact of honing dynamics on surface finish of precoated cylinder bores

机译:珩磨动力学对预涂缸孔表面光洁度的性能影响

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摘要

The surface modification of engine cylinder bores with improved sliding properties is often produced by the honing process. This multi-stage process is performed using abrasive stones loaded against the bore with simultaneous rotation and oscillation. To guarantee this process robustness with acceptable dimensional accuracy and surface quality, the stone dynamic effects in continuous balanced contact with the workpiece have to studied deeply. This paper highlights these effects on honed surface textures. The stone dynamic behavior was studied at conventional regime ranged from 0,5g to 1,5g as often used in mass production. In this range, the dimensional accuracy is ensured by opposition to the surface appearance. However, higher accelerations up to 2,5g improve simultaneously the form quality (especially straightness) and reduces the cycle time. This work shows, at least, that the bore surface finish can be dynamically controlled while honing. This technology is enabled by a micro scale regeneration mechanism of abrasive stones.
机译:具有珩磨性能的发动机气缸孔的表面改性通常是通过珩磨工艺进行的。这个多阶段的过程是使用砂轮同时旋转和振荡地加载到孔上的磨石来执行的。为了在可接受的尺寸精度和表面质量上保证该过程的鲁棒性,必须深入研究与工件连续平衡接触时的石材动力学效应。本文重点介绍了这些对珩磨表面纹理的影响。在批量生产中通常使用的0.5g至1.5g的常规范围内研究了石材的动力学行为。在该范围内,通过与表面外观相反来确保尺寸精度。但是,高达2.5g的较高加速度会同时改善成形质量(尤其是直线度)并缩短周期时间。这项工作至少表明,珩磨时可以动态控制孔的表面光洁度。该技术通过磨石的微型再生机制实现。

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