GT4169高速切削镍基高温合金切削力和表面粗糙度的研究
时间:2018-07-09 10:06 来源:毕业论文 作者:毕业论文 点击:次
| 摘要镍基高温合金具有高温强度，耐氧化性，耐腐蚀性等良好的物理力学性能，是航天航空领域不可或缺的材料。但镍基高温合金又是当前最难加工合金之一，它在切削过程中切削力很大，切削温度很高，加工硬化很严重。所以，改善镍基合金的切削加工性成为一个需要迫切研究的课题。25467 本文以镍基合金GT4169为实验材料，研究了YBC251材质的VP15涂层刀片CCMT1204高速切削GT4169的切削力，表面粗糙度以及它的切屑形态。为更好研究GT4169的切削性能，首先运用了DEFORM-3D仿真了GT4169切削过程，并对切屑形成、切削温度、切削力做了分析。又通过做高速切削镍基高温合金的单因素试验和正交试验，采用折线图和极差分析法分析了切削用量对切削力、表面粗糙度和切屑的影响。试验表明：切削用量对切削力的影响程度依次为切削深度、进给量、切削速度；对表面粗糙度的影响因素依次为进给量、切削深度、切削速度；切削速度对切屑影响最大。最后，通过实验结果，得出了切削力的经验预测模型。 关键词 镍基高温合金 高速切削 切削力 表面粗糙度 毕业论文设计说明书外文摘要 Title Research on the cutting force and the surface roughness of nickel based alloy in high speed cutting. Abstract Nickel based high temperature alloy has many good physical and mechanical properties such as high temperature strength, oxidation resistance, corrosion resistance and so on, it is an indispensable material used in aerospace field. But the nickel based alloy is one of the most difficult alloy in the cutting process, because the cutting force is very large and the cutting temperature is very high, what's more, it has very serious work hardening in the cutting process. So, how to improve the machinability of nickel based alloy become an urgent research topic. In this paper, we use carbide insert ccmt1204 to cut nickel based alloy GT4169 with a high speed in order to study its cutting force, surface roughness and the chip shape. First, we simulate the cutting process with DEFORM-3D. By single factor test and orthogonal test of high speed cutting of nickel based alloy, we analysis the influence of cutting parameters on cutting force, surface roughness and chip using the line graph and range analysis method. The test shows that: The extent of cutting parameters influenced on cutting force is feed rate, cutting depth, cutting speed; The extent of cutting parameters influenced on the surface roughness is feed rate, cutting depth, cutting speed; The influence of cutting speed on chip is maximum. Finally, according to the experimental results, we obtained the experience of cutting force prediction model. Keywords Nickel based alloy High speed cutting Cutting force Surface roughness 目 录 1 绪论 1 1.1 镍基高温合金特点 1 1.2 高速切削加工技术 3 1.3 高速切削镍基高温合金的研究现状 5 1.4 课题背景 7 1.5 主要研究内容 7 2 镍基高温合金GT4169车削的有限元仿真 9 2.1 有限元仿真软件DEFORM-3D 9 2.2 仿真的前处理过程 9 2.3 仿真的模拟过程 10 2.4 仿真的后处理过程 11 2.5 本章小结 13 (责任编辑：qin) |