| 摘要: |
| 采用二极管泵浦ND.YAG激光器，在YG6X硬质合金刀片上加工出具有一定尺寸和分布的凹槽织构，并以此刀片对6061T6铝合金棒料进行切削加工对比试验。结果表明：与无织构刀具相比，较优参数的凹槽织构刀具的主切削力Fz的波动幅度减小，峰值切削力的均方根值和均值分别减小了约10%和9%。且凹槽间距越小，Fz越小，稳定性越好。采用光学显微镜对切削后的刀片进行检测，发现适当的凹槽几何参数能提高刀具的切削性能。凹槽间距和凹槽方向对织构刀具的抗粘性能有较大的影响，凹槽间距越小，凹槽方向与切屑流向的夹角越大，切屑与刀具的粘结程度越轻。不恰当的凹槽间距和方向，不仅不会提高刀具的性能，反而会显著增大刀具的磨损。 |
| 关键词: 微沟槽 车刀 减摩 抗粘 |
| DOI：10.3969/j.issn.1007-9289.2013.06.018 |
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| Cutting Trial and Performance Analysis of Surface Micro-grooves Turning Tools |
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FU Yonghong, XIAO Kailong, HUA Xijun, YUAN Zhichao, YANG Yegang
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School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu
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| Abstract: |
| Groove textures of proper size and arrangement were made by diodepumped ND.YAG laser on YG6X cemented carbide tools, which were used to turn 6061T6 aluminum alloy bar to conduct the cutting comparative tests. It is found that, compared with the untextured tools, the main cutting force Fz of better textured tools fluctuates within a small range, and the mean square value and average value of Fz are reduced about 10% and 9%, respectively. The smaller the groove distance is, the smaller the Fz is, and the better the stability gets. The profiles of the rake face of the tools after cutting are measured by an optical microscope, and it is found that proper groove parameters can improve the cutting performance. The space between two grooves and the groove direction has a great impact on antiadhesion property of textured tools. With the smaller distance and the larger angle between the grooves and the chip flow direction, better antiadhesion performance will be achieved. Inappropriate distance and direction of the microgrooves tools can not improve the performance of the tool, but significantly reduce the tools life. |
| Key words: microgrooves turning tool antifriction antiadhesion |
