Peng Zhenlong, Zhang Xiangyu, Zhang Deyuan
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China; Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing 100191, China.
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China; Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing 100191, China; Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China.
Ultrasonics. 2021 Mar;111:106340. doi: 10.1016/j.ultras.2020.106340. Epub 2020 Dec 15.
Hardened steel has been widely used in the aviation and automotive fields owing to its unique properties. However, the poor machining performance for finishing hardened steel owing to low attainable cutting speeds and rapid tool wear has become a bottleneck in the functional performance and range of applications. In this study, a radial high-speed ultrasonic vibration cutting (R-HUVC) process was adopted for improving the machining performance of finishing hardened steel. R-HUVC involves the use of radial ultrasonic vibrations which ensure the separation of the tool and workpiece. The kinematics of R-HUVC were analyzed through a theoretical model, and its surface generation mechanisms in the intermittent cutting mode were studied. Then, finish turning experiments were conducted on the cutting force, surface roughness, and tool life to validate its machining performance compared to that of conventional cutting (CC) for a wide range of finishing conditions. The experimental results showed that R-HUVC can realize a lower cutting force, longer tool life, and better surface roughness compared to CC. It was verified that R-HUVC can be applied to high-speed machining for the finish turning of hardened steel because it improves the machining performance.
由于其独特的性能，硬化钢已在航空和汽车领域得到广泛应用。然而，由于可达到的切削速度较低以及刀具磨损迅速，硬化钢精加工时的加工性能较差，这已成为其功能性能和应用范围的瓶颈。在本研究中，采用径向高速超声振动切削（R-HUVC）工艺来提高硬化钢精加工的加工性能。R-HUVC涉及使用径向超声振动，以确保刀具与工件分离。通过理论模型分析了R-HUVC的运动学，并研究了其在间歇切削模式下的表面生成机理。然后，针对切削力、表面粗糙度和刀具寿命进行了精车削实验，以验证其在广泛的精加工条件下与传统切削（CC）相比的加工性能。实验结果表明，与CC相比，R-HUVC可以实现更低的切削力、更长的刀具寿命和更好的表面粗糙度。已证实R-HUVC可应用于硬化钢精车削的高速加工，因为它提高了加工性能。
