Experiment on surface integrity of side milling titanium TB6
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摘要: 使用表面完整性基本评价方法对TB6钛合金侧铣后试件的表面完整性（表面形貌、表面粗糙度、加工硬化）进行研究.结果表明，对表面形貌影响最明显的因素是每齿进给量fz，过大的fz会使已加工表面出现鳞刺现象.fz是影响已加工表面进给方向粗糙度的最主要因素，随着fz从0.06 mm/z增大到0.12 mm/z，表面粗糙度Ra会由0.283 μm显著增加到0.964 μm.线速度vc，fz和径向切深ae的变化对刀轴方向粗糙度影响很小.而刀具的后刀面磨损是影响已加工表面刀轴方向粗糙度的主要因素，极轻微的后刀面磨损都会导致刀轴方向粗糙度明显增加，随着后刀面磨损量VB由0增加到0.025 mm，刀轴方向粗糙度由0.22 μm剧烈增加到0.686 μm.侧铣过程中TB6的加工硬化现象不严重，表层组织没有明显变质层产生，晶粒也没有出现明显的拉伸、扭曲或破裂.Abstract: The surface integrity (surface topography, surface roughness, work hardening) of TB6 after side milling was studied based on the minimum data set. The results show that it's the feed engagement (fz) that influences the surface topography most and high fz may cause scale on the milled surface. fz is the main reason that influences the roughness of feed direction. The surface roughness (Ra) raised from 0.283 μm to 0.964 μm with fz increased from 0.06 mm/z to 0.12 mm/z. The milling parameters (vc,fz,ae) have no apparent influence on the roughness perpendicular to the feed direction while the flank wear (VB) influences it a lot. With the VB raised from 0 to 0.025 mm, the roughness perpendicular to the feed direction increased from 0.22 μm to 0.686 μm. There is no apparent work hardening or surface degenerating layer appeared during the side milling process of TB6.
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Key words:
- TB6 /
- surface integrity /
- microstructure /
- surface roughness /
- work hardening
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