Effect of Drilling Processes on Surface Integrity of 7075Aluminum Alloy Holes
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摘要: 从表面完整性角度研究了5种制孔工艺对7075铝合金板材紧固孔表面加工质量的影响,通过对不同种工艺所产生的紧固孔表面粗糙度、残余应力和显微硬度进行检测和比较,发现钻扩铰多步慢进给工艺和钻扩铰一步复合制孔工艺所达到的表面完整性指标优于其它加工工艺.另外分析了影响孔加工质量的因素,证明了一步复合制孔工艺是一种先进、快捷的高质量制孔方法.Abstract: Effect of the five drilling processes on the surface quality of fastening holes of 7075-aluminum alloy plate used in aircraft structures was investigated with the respect of surface integrity. By measuring and comparing of surface roughness, residual stress and micro hardness, it was found that the surface integrity of holes obtained by multiple-step machining with slow feed and byone-step compound machining were superior to that obtained by the other three drilling processes. In addition, factors influencing surface conditions were analyzed, and it was proved that one-step compound machining was an advanced and fast drilling method with high quality.
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Key words:
- surface roughness /
- residual stress /
- work hardening /
- drilling quality /
- surface integrity
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