摘要
为了明确切削速度对某新型易切削钢切屑形态及加工表面形貌的影响规律,开展了不同切削速度下某新型易切钢的切削试验,研究切屑形态和已加工表面形貌并分析其产生原因。结果表明:宏观上,在切削速度大于150 m/min时,该易切削钢切屑以短管螺旋状为主,当切削速度小于150 m/min时,切屑以发条状和破断弧形为主,形成锯齿形切屑的临界切削速度大约在200 m/min;切削速度影响切屑底面形貌,在低速切削时,切屑底面较多大小不一的撕裂状凹坑、沟槽,当切削速度增大至200 m/min时,能够形成表面较光滑的切屑底面;低速切削该易切削钢时,工件表面粗糙度较大,3D形貌显示波峰高度、波谷深度也均较大,随着切削速度的增加,粗糙度减小,3D形貌亦趋于平缓。
In order to investigate the effect of cutting speed on chip morphology and machined surface topography of a new type freecutting steel,the cutting experiments of a new type free-cutting steel were carried out at different cutting speeds,the chip morphology and machined surface topography were studied and the causes were analyzed.The results show that the free-cutting steel chip shape is mainly short tube spiral when the cutting speed is greater than 150 m/min,the free-cutting steel chip shape is mainly strip and broken arc when the cutting speed is less than 150 m/min,the critical cutting speed for saw-tooth chip formation is approximately 200 m/min;cutting speed has a great influence on the morphology on chip bottom,there will be more tearing pits and grooves with different sizes on the bottom of the chip when the cutting speed is low,however,when the cutting speed is increased to more than 200 m/min,a smoother chip bottom surface can be formed;the machined workpiece surface roughness values are larger,and the 3D morphology of machined workpiece shows that the peak height and trough depth are also large when the cutting speed is low,the workpiece surface roughness de⁃creases with the increase of cutting speed,the 3D topography of the machined surface tends to flat with the increasing of cutting speed.
作者
雷小宝
庆振华
谢峰
LEI Xiaobao;QING Zhenhua;XIE Feng(School of Electrical Engineering and Automation,Anhui University,Hefei Anhui 230601,China;School of Mechanical Engineering,Hefei University of Technology,Hefei Anhui 230009,China)
出处
《机床与液压》
北大核心
2024年第4期50-55,共6页
Machine Tool & Hydraulics
基金
安徽省自然科学基金项目(1808085ME148)
国家自然科学基金面上项目(51975003)。
关键词
易切削钢
切削速度
切屑形态
加工表面形貌
粗糙度
free-cutting steels
cutting speed
chip morphology
machined surface topography
roughness