超声辅助TiAlN和TiAlSiN涂层刀具切削不锈钢性能的研究

Study on Cutting Performance of Stainless Steel with Ultrasonic Assisted TiAlN and TiAlSiN Coated Tools

研究了不同涂层铣刀在超声振动辅助作用下切削304不锈钢的切削性能,如磨损情况、刀具寿命、工件表面质量以及切削力。分别采用未涂层、TiAlN、TiAlSiN涂层铣刀结合超声刀柄进行铣削实验;对比研究不同影响因素耦合下的切削性能;采用超景深三维视频显微镜表征刀具后刀面磨损情况;采用粗糙度测量仪测试工件表面粗糙度;采用扫描电镜观察工件的表面形貌;采用kistler测力仪测量切削力。结果表明:TiAlN涂层铣刀在超声振动辅助下,磨料磨损速度最慢,铣刀使用寿命最长(走刀距离在45m左右),其寿命是无超声振动辅助无涂层铣刀寿命的11.25倍。TiAlN涂层铣刀在超声振动辅助下加工304不锈钢工件的表面粗糙度最好;从无超声状态到有超声状态下加工,TiAlN涂层刀具加工时工件所受的切削力均略小于TiAlSiN涂层刀具加工时工件所受的切削力。

The cutting performance of cutting 304 stainless steel by applying coated milling tools with ultrasonic vibration assist were studied,such as wear pattern, tool life, workpiece surface quality and cutting force. The milling experiments were carried out by applying milling tools coated with uncoated, TiAlN and TiAlSiN. The cutting performance under the coupling of different factors was studied. The flank wear of cutting tool was characterized by 3D microscope with the depth of field. The surface roughness and surface morphology of the workpiece was observed by surface roughness tester and scanning electron microscope(SEM). The cutting force was measured by kistler dynamometer. The results show that TiAlN coated milling tool with ultrasonic vibration assist has the lowest abrasive wear speed and the longest service life(The cutting length is about 45 m),which is 11.25 times of that of the uncoated milling tool without ultrasonic vibration assist. The workpiece machined by applying TiAlN coated milling tool with the help of ultrasonic vibration shows the best surface roughness. From no ultrasonic state to ultrasonic state processing, the cutting force of TiAlN coated milling tool is slightly less than that of TiAlSiN coated milling tool.