摘要
使用聚晶立方氮化硼(PCBN)刀具对精密液压滑阀阀芯进行了轴向超声振动车削试验,揭示了进给量对切削温度、切削力、表面粗糙度和切屑形貌的影响规律。试验结果表明:进给量f=0.01 mm/r时,轴向超声振动切削温度随切削速度的变化最为平缓,粗糙度Ra值的范围在0.15~0.38μm之间,主切削力Fz最大;在切削速度v=170 m/min,背吃刀量a p=0.08 mm,超声振幅为0.01 mm的条件下,随着进给量的增大,切屑宏观形态依次为粒状、节状和小螺旋状,并且切屑的颜色逐渐变深;进给量f=0.025 mm/r时,从切削力、切削温度、表面粗糙度的变化规律及切屑的宏观形态来看,轴向超声振动车削的优势变的不明显。
The axial ultrasonic vibration turning test of the precision hydraulic spool valve core was carried out by utilizing the Polycrystalline Cubic Boron Nitride(PCBN)tool.The influences of the feed rate on cutting temperature,cutting force,surface roughness and chip morphology were revealed.The test results show that when the feed rate f=0.01 mm/r,the axial ultrasonic vibration cutting temperature changes most smoothly with the cutting speed,the surface roughness value ranges from 0.15μm to 0.38μm,and the main cutting force Fz is the largest;the macroscopic morphology of the chips are:granular,nodular,small spiral,and the color of the chips becomes darker gradually with the increase of feed rate which under the condition of cutting parameter v=170 m/min,a p=0.08 mm and ultrasonic amplitude of 0.01 mm;when the feed rate f=0.025 mm/r,the advantages of axial ultrasonic vibration cutting are not obvious from the cutting force,cutting temperature,changes law of surface roughness and chip macroscopic morphology.
作者
王栋梁
窦建明
彭文
张红梅
Wang Dongliang;Dou Jianming;Peng Wen;Zhang Hongmei(Engineering Training Center,Lanzhou Institute of Technology,Lanzhou 730050,China;College of Electromechanical Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China)
出处
《现代制造工程》
CSCD
北大核心
2020年第1期97-101,共5页
Modern Manufacturing Engineering
基金
甘肃省高等学校科研项目(2018A-130)
甘肃省科技计划资助项目(18JR3RA232)
兰州工业学院青年科技创新项目(19K-022)
关键词
超声振动车削
滑阀阀芯
切削力
表面粗糙度
切屑
ultrasonic vibration turning
spool valve core
cutting force
surface roughness
chips
