Influence of the built-up edge on the stress state in the chip formation zone during orthogonal cutting of AISI1045
Influence of the built-up edge on the stress state in the chip formation zone during orthogonal cutting of AISI1045
复制标题
AISI1045正交切削时积屑瘤对切屑形成区应力状态的影响
DOI：
10.1016/j.procir.2015.03.101
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Brömmelhoff
中科院分区：
文献类型：
--
作者：
Uhlmann;Brömmelhoff
利用高能同步辐射技术对AISI 1045正交切削过程中的应变进行了原位测量。因此，它是可能的，以确定在切削过程中的切屑形成区的应力状态。因此，已经对切割过程中形成的积屑瘤进行了观察。在切削低碳钢和其他韧性材料时，特别是在低切削速度下，在切削刀具上形成堆积刃是一种常见现象。这可能会导致刀具磨损增加和最终表面质量下降。通过分析现场实验的切屑根部，可以确定前角γ = 0°、切削刃半径rβ= 30 μm和rβ= 60 μm的刀具上组合刃的几何形状。使用所获得的数据，可以建立表示组合边缘的仿真模型，其中组合边缘具有两个版本：作为刚性工具的一部分的实心边缘和工具前面的弹性边缘。使用有限元切削模拟与无积屑边缘，它是可能的，显示积屑边缘上的切屑形成和切屑形成区的应力状态的影响。有了这些数据，切削模拟的结果与原位实验的结果进行了比较。
In-situ strain measurements with high energy synchrotron radiation during orthogonal cutting of AISI1045 were carried out. Thereby it was possible to determine the stress state in the chip formation zone during the cutting process. As such, observations regarding the formation of built-up edges during the cutting process have been made. The formation of a built-up edge on the cutting tool is a common phenomenon during cutting of mild steel and other ductile materials, in particular at low cutting speeds. This may result in increased tool wear and a decrease in the resulting surface quality. By analyzing the chip roots of the in-situ experiments, it was possible to determine the geometry of the built-up edges on tools with a rake angle of γ = 0° and cutting edge radii of rβ= 30 μm and rβ= 60 μm. Using the obtained data a simulation model which represents the built-up edge could be established with two versions of the built-up edge: a solid one as part of the rigid tool and an elastic one in front of the tool. Using FEM cutting simulations with and without built-up edges, it was possible to show the influence of a built-up edge on the chip formation and the stress state in the chip formation zone. With this data, a comparison of the results of the cutting simulations with those of the in-situ experiments was conducted.