| 摘要: |
| 目的 针对目前车削 Inconel 718 镍基高温合金主要面临的可加工性差和刀具磨损两个问题,提出表面微织
构技术进行刀具设计与制备。 方法 首先建立微织构刀具的理论刀-屑接触长度模型,其次,利用理论刀-屑接触长
度模型,建立表面织构刀具切削力的理论模型以及切削热的理论模型;最后,根据理论刀-屑接触长度的变化规律,
对微织构刀具的切削力、切削温度进行理论分析,并最终建立有限元仿真模型。 结果 通过有限元仿真结果表明微
织构刀具比硬质合金刀具的车削性能要好。 结论 与硬质合金刀具的切削力对比,微织构刀具的三向切削力均偏
小;且轴向力、径向力在一定范围内波动,主切削力呈增长趋势。 与硬质合金刀具的切削温度对比,微织构刀具可
以降低切削过程中切削热,且圆形微织构刀具是 3 种微织构刀具中切削温度最低的;与硬质合金刀具对比,表面微
织构可以降低刀具表面磨损问题,减少刀具与切屑的挤压作用和摩擦作用,且不同形状的表面织构产生的磨损深
度不同。 |
| 关键词: Inconel 718 微织构刀具 切削力 有限元仿真 刀具磨损 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Research on Turning Inconel 718 Alloy with Different Shape Surface Microtextured Tools |
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GUO Dongyun；WANG Dazhong
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School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Shanghai 201620 China
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| Abstract: |
| Objective In view of the two main problems of poor machinability and tool wear in turning Inconel 718 nickelbased superalloy surface micro-texture technology was proposed for tool design and fabrication. Methods Firstly the theoretical tool-chip contact length model of the micro-texture tool was established. Secondly the theoretical models of
cutting force and cutting heat of surface texture tool were established by using the theoretical tool-chip contact length
model. Finally the cutting force and cutting temperature of the micro-textured tool were analyzed theoretically according
to the changes in theoretical tool-chip contact length and the finite element simulation model was established.
Results The results of finite element simulation show that the micro-texture tool has better turning performance than the
carbide tool. Conclusion Compared with the cutting force of carbide tools the three-way cutting force of the micro-texture
tool is small. The axial force and radial force fluctuate in a certain range and the main cutting force is increasing.
Compared with the cutting temperature of carbide tools micro-texture tools can reduce the cutting heat during cutting and
the circular micro-texture tool has the lowest cutting temperature among the three micro-texture tools. Compared with carbide tools surface micro textures can reduce the surface wear of the tool and reduce the extrusion and friction between the tool and the chip. And the different shapes of surface micro-textures produce different wear depths. |
| Key words: Inconel 718 microtextured too cutting force finite element simulation tool wear |
