| 郭东升， 张敏良， 赵森， 丁宁， 吴经洋.超声振动车削参数对切削力的影响[J].轻工机械,2019,37(5):29-33 |
| 超声振动车削参数对切削力的影响 |
| Effect of Ultrasonic Vibration Turning Parameters on Cutting Force |
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| DOI：10.3969/j.issn.1005 2895.2019.05.006 |
| 中文关键词: 金属切削 超声振动车削 微观切屑形态 切削速度 振动参数 切削机理 |
| 英文关键词:metal cutting ultrasonically vibration turning microcosmic chip morphology cutting speed vibration parameters cutting mechanism |
| 基金项目: |
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| 中文摘要: |
| 为了探究超声振动车削（UVT）过程中刀具振动频率、振幅和切削速度3个参数对切削力的影响，课题组通过建立有限元模型，对高强度铝合金超声振动车削和普通车削（CT）过程进行了对比研究。首先，研究了切削区域的Mises应力分布的变化;其次，对切削区域温度和微观切屑形态进行了分析，从微观层面揭示UVT方法降低切削力和切削温度的机理；最后，分别研究了刀具振动频率、振幅和切削速度对UVT平均切削力的影响。研究表明：超声振动车削的有限元仿真结果与“刀具 工件接触比理论”一致；在一定的范围内，增大刀具振动频率或振幅以及降低切削速度的方法可以有效降低切削力。文中的研究显示合理的选择超声振动车削工艺参数可以降低切削力，改善高强度铝合金的制造工艺。 |
| 英文摘要: |
| To explore the influence of tool vibration frequency, vibration amplitude and cutting speed on cutting force in ultrasonic vibration turning (UVT), the UVT process of high strength aluminum alloys was compared with that conventional turing (CT) by establishing the finite element model. Firstly, the distribution of Mises stresses in the cutting zone was investigated. Next, the temperature of cutting zone and microcosmic chip morphology were studied, which revealed the mechanism of UVT method to reduce cutting force and cutting temperature on the micro level. Furthermore, the effects of tool vibration frequency, tool vibration amplitude and cutting speed on average cutting forces of UVT were investigated, respectively. The results show that the finite element simularion of UVT are in accordance with the theory of tool workpiece contact ratio. Both the increase of tool vibration frequency or tool vibration amplitude and the decrease of cutting speed within limits reduce the cutting forces. It is indicated that reasonable selection of ultrasonic vibration turning parameters can reduce cutting force and improve the manufacturing process of high strength aluminum alloy. |
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