论文部分内容阅读
ZL109铝合金对刀具的磨损严重,难以获得较好的加工精度.而刀具几何参数对切削力、切削温度、表面加工质量和刀具耐用度都有重要的影响,对刀具几何参数进行优化具有重要意义.利用材料试验机和SHPB装置对ZL109进行准静态和动态冲击压缩实验,确定ZL109铝合金的本构模型参数.采用单因素试验法,模拟刀具的前角、后角和刀尖圆弧半径对切削力和刀尖温度影响.结果表明:刀尖圆弧半径对X和Y方向切削力的影响最大,前角对Z方向切削力的影响最大,而后角对刀尖温度的影响最大.通过正交试验法和极差分析,当刀具几何参数选择为前角γ0=0°,后角α0=7°,刀尖圆弧半径r=0.4 mm时,PCD车刀切削ZL109铝合金时刀具的切削性能最优.
ZL109 aluminum alloy has serious wear on the tool, so it is difficult to obtain good machining precision.The geometrical parameters of the tool have an important influence on cutting force, cutting temperature, surface quality and tool durability, and it is significant to optimize the geometrical parameters of the tool Using the material testing machine and SHPB device, ZL109 was subjected to quasi-static and dynamic impact compression experiments to determine the constitutive model parameters of ZL109 aluminum alloy.Using the single factor test method to simulate the tool rake angle, relief angle and tool nose radius Cutting force and tip temperature.The results show that the tip radius has the greatest influence on X and Y cutting forces, the rake angle has the greatest effect on cutting force in Z direction, and the relief angle has the greatest influence on tip temperature. When the geometrical parameters of the tool are selected as the front angle γ0 = 0 °, the back angle α0 = 7 °, and the radius of the tool nose is r = 0.4 mm, the cutting of the tool when the PCD tool cuts the ZL109 aluminum alloy Optimal performance.