碳纤维增强热塑性树脂基复合材料周铣过程中刀-工-屑热量分配比例计算与切削温度预测
Calculation of the heat distribution ratio of tool-chip-workpiece and prediction of cutting temperature during the peripheral milling process of carbon fiber reinforced thermoplastic resin matrix composites
王福吉 1姜向何 1魏钢 1周洪岩 1葛连恒1
作者信息
- 1. 大连理工大学 机械工程学院,大连 116024;高性能精密制造全国重点实验室,大连 116024
- 折叠
摘要
碳纤维增强热塑性树脂基复合材料(简称"热塑性复材")对温度变化敏感.针对碳纤维/聚醚醚酮(CF/PEEK)热塑性复材周铣加工过程,建立了包括各向异性材料塑性变形与刀-工-屑多面摩擦作用的复合热源模型,求解了以不同纤维方向切削热塑性复材时刀-工-屑的切削热量分配比例,最终构建了热塑性复材周铣温度预测模型,并由此分析了纤维方向、切削速度、进给量等工艺参数的影响.经实验验证,模型平均预测误差低于 11.5%.结果表明:大角度切削时,流入工件的热量比例更高,导致铣削温度更高.随切削速度的增大,铣削温度先上升后下降,切削速度临界值在 100 m/min附近;而随着进给量增加,铣削温度总体呈下降趋势,当进给量由0.01 mm/r增大到0.1 mm/r时,铣削温度下降40%以上.
Abstract
Carbon fiber reinforced thermoplastic resin matrix composites(CFRTP)are sensitive to temperature change.A composite heat source model for the peripheral milling process of carbon fiber(CF)/poly(ether-ether-ketone)(PEEK)thermoplastic composites was established,which included the plastic deformation of anisotropic materials and the multi-faceted friction from tool-workpiece and tool-chip.The cutting heat distribution ratio of tool-chip-workpiece was solved when cutting thermoplastic composites in different fiber orientations.Finally,a prediction model for the peripheral milling temperature of thermoplastic composite materials was constructed,and the effects of process parameters such as fiber orientations,cutting speed and feed rate were analyzed.Through experimental verification,the average prediction error of the model is less than 11.5%.The results show that a higher proportion of heat flows into the workpiece when performing machining with a large cutting angle,resulting in higher milling temperatures.With the increase of cutting speed,the milling temperature first increases and then decreases,and the critical value is around 100 m/min.As the feed rate increases,the overall milling temperature shows a downward trend.When the feed rate increases from 0.01 to 0.1 mm/r,the milling temperature decreases by more than 40%.
关键词
热塑性复材/PEEK/周铣加工/热分配比例系数/切削温度Key words
thermoplastic composites/PEEK/peripheral milling/heat distribution ratio coefficient/cutting tem-perature引用本文复制引用
基金项目
国家自然科学基金(52090053)
大连市科技创新基金(2021RD08)
大连市科技创新基金(2022JJ12GX027)
出版年
2024
NETL
NSTL
万方数据