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针对航空航天领域钛合金难加工材料采用普通麻花钻传统钻削过程中孔出口毛刺大、导致去毛刺困难及影响紧固件装配质量的问题,提出了一种基于新刃型刀具(八面钻)的钛合金旋转超声辅助钻削(RUAD)的新技术。分析了RUAD原理,采用文中所设计的RUAD主轴结合CA6140车床平台、测力系统、测温系统、高速摄影系统以及非接触激光测量系统进行了钛合金RUAD制孔试验和孔出口毛刺研究,对比普通钻削(CD)分析了RUAD降低孔出口毛刺的机理,并建立了基于八面钻的CD和RUAD的毛刺形成模型。试验结果表明:相比于CD,RUAD明显降低钻削力、孔出口最高切削温度和毛刺高度,分别降低了16.79%~20.2%,18.54%~21.68%和82.27%~89.18%,极大降低了钛合金孔出口去毛刺的困难和制造成本,提高了生产进度。
In the field of aerospace titanium alloy difficult to process materials using ordinary twist drill hole burrs traditional large burr, leading to deburring difficulties and affect the quality of the fastener assembly, a new blade based on the tool (octahedral drill ) Titanium alloy rotary ultrasonic assisted drilling (RUAD) of the new technology. The principle of RUAD was analyzed. The RUAD hole test and hole burr of titanium alloy were studied by RUAD spindle combined with CA6140 lathe platform, force measuring system, temperature measuring system, high-speed photographic system and non-contact laser measuring system. Compared with ordinary Drilling (CD) analyzed the mechanism by which RUAD reduced the burr at the exit of the hole and established a burr formation model based on the CD and RUAD of the octahedral drill. The experimental results show that RUAD significantly reduces the drilling force compared to CD, and the maximum cutting temperature and burr height at the exit of the hole are reduced by 16.79% -20.2%, 18.54% -21.68% and 82.27% -89.18% respectively, Titanium alloy hole deburring difficulties and manufacturing costs, improve the production progress.