摘要: |
C/C-SiC复合材料具有高比强、高硬度、耐高温和热稳定性好等优点,已在航空、航天、高速刹车等领域广泛应用,但加工表观质量是限制其应用的重要因素。研究了切削深度ap、主轴转速n、切削进给量f对C/C-SiC复合材料的超声振动铣削表观质量的影响。结果表明:当切削深度ap=1~2mm、主轴转速n=1000~2000r/min、切削进给量f=0.2~0.5mm/r时,C/C-SiC复合材料的超声振动铣削加工效率最高,相应的表观质量也较好,适用于粗加工工序;当切削深度ap=0.1~0.5mm、主轴转速n=1000~2000r/min、切削进给量f<0.2mm/r,则可以获取最佳的表面加工质量,适用于精加工工序。 |
关键词: C/C-SiC;超声振动铣削;切削深度;主轴转速;切削进给量 |
基金项目: |
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Ultrasonic Vibration Milling of C/C-SiC Composites |
Xu Hongxia Wang Huan Sun Kun Niu Jun Liu Bin
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Xi’an Aerospace Composites Research Institute, Xi’an 710025
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Abstract: |
C/C-SiC composites have been extensively used in the fields such as aerospace and high speed braking, due to their excellent performances like high specific strength, high hardness, high temperature resistance and good thermal stability. However, the processed surface quality is an important factor limiting their application. Influences of parameters of the ultrasonic vibration milling technology, such as the depth of cutting ap, spindle rotate n and the feed rate f, on the machined surface quality of C/C-SiC composites were investigated. The results showed that the highest production efficiency together with a relative good surface quality, could be obtained for the C/C-SiC composites at the given parameters: the depth of cutting ap=1~2mm, the spindle rotate n=1000~2500r/min, and the feed rate f=0.2~0.5mm/r, which was appropriate for rough milling. Meanwhile, the optimum surface quality could be achieved at the given parameters: the depth of cutting ap=0.1~0.5mm, the spindle rotate n=1000~2000r/min, and the feed rate f<0.2mm/r,which was most suitable for finish machining. |
Key words: C/C-SiC;ultrasonic vibration machining;cutting depth;spindle rotate;feed rate |