| LIU Zhaowei,YANG Fazhan,JIANG Fulin,HUANG Ke,YANG Yu,ZHAO Shuo,SUI Xiaobin.Synergistic Effect of Nano Particles and Micro-texture on Tool Cutting Performance under Micro Lubrication Conditions[J],53(10):183-195 |
| Synergistic Effect of Nano Particles and Micro-texture on Tool Cutting Performance under Micro Lubrication Conditions |
| Received:July 31, 2023 Revised:October 08, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.10.015 |
| KeyWord:micro lubrication nano particles synergistic effect micro texture cutting performance reducing friction and wear |
| Author | Institution |
| LIU Zhaowei |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China;Key Laboratory of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Shandong Qingdao , China |
| YANG Fazhan |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China;Key Laboratory of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Shandong Qingdao , China |
| JIANG Fulin |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China;Key Laboratory of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Shandong Qingdao , China |
| HUANG Ke |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China |
| YANG Yu |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China |
| ZHAO Shuo |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China |
| SUI Xiaobin |
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao , China |
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| Abstract: |
| To investigate the synergistic effect of nano particles and texture on the cutting performance and mechanism of YG8 hard alloy cutting tools under micro lubrication conditions, the work aims to adopt ABAQUS numerical simulation software to simulate different working conditions by changing the friction coefficient and convective heat transfer coefficient of tool chip contact. The equivalent plastic strain value, equivalent stress value, and cutting force changes of the workpiece under different working conditions were evaluated and predicted. At the same time, cutting force experiments were conducted on the micro lubrication turning platform to verify the cutting performance of tools. By calculating the wear area of the tool rack face and combining the main element content of the rack face wear area, the chip morphology and its change pattern, and the quality of the processed surface, the cutting processing performance of the tool was comprehensively evaluated, and the mechanism of the synergistic behavior between nano particles and texture was explored. The ABAQUS simulation results showed that compared to N-O-T, the chip layer generated by N-O-M was thinner and the equivalent plastic strain was smaller, with the maximum equivalent stress value of 1.36×103 MPa, reduced by 26.4% and the average cutting force of 232 N, reduced by 39.5%, and the tool friction and wear reduction effect was significantly improved. There was a high degree of consistency between the experimental and simulated values of average cutting force under different cutting conditions. Among them, the minimum wear area of N-O-M was only 1.95×10−2 mm2, with the wear area of 39.8% of N-O-T and the material exhibited less adhesion and chipping behavior. N-O-M formed the excellent chip morphology with a smaller curling radius, no obvious burrs on the chip end face, and no obvious scratches on the free surface, the distribution type of the processed surface ridges was slender, the adhesion form of the material changed from sheet adhesion to point adhesion, and the surface quality was excellent. The synergistic effect of micro-texture and nano particles under micro lubrication conditions has an important impact on improving the cutting performance of cutting tools. The atomized micro droplets explode and converge in the vacuum zone above the texture to form a liquid film. Under a certain pressure, they penetrate the tool chip contact interface and continue to act on the cutting area until reaching a quasi equilibrium state. This can achieve timely cooling effect on the tool chip contact interface and allow debris to be discharged in the cutting area in a timely manner, reducing the adhesion and wear state of the tool during the cutting process and improving the service life of the tool. The nano particles in the micro-texture are periodically released to the contact interface of the friction pair with the flow characteristics of the lubricating medium. When the lubrication state between the contact surfaces of the friction pair changes from boundary lubrication to complete fluid lubrication, they act as "micro bearings" to change the friction lubrication form in the cutting area, transforming the sliding friction form between the friction contact surfaces into the rolling friction form and achieving the effect of reducing friction and wear. |
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