Present situation and analysis of micro drilling of nickel base alloy
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摘要: 镍基合金因其优异的物理性能被广泛应用于航空涡轮发动机中，而航空涡轮发动机涉及到许多精密零件需要用微钻进行加工，钻削镍基合金时材料加工硬化现象严重，致使加工难度增加，刀具磨损严重，影响钻孔质量。分析了镍基合金微小孔钻削面临的难题，从切屑形成机制、钻削力与扭矩、钻削热和钻削温度等方面对微钻削机理进行了总结和讨论，分析了钻头的磨损形式、影响因素和磨损机制，探讨了影响毛刺、白层和圆度等孔加工质量的因素，从刀具几何形状、刀具材料和辅助钻削方法等方面提出了一些提高孔加工质量的措施。Abstract: Nickel base alloy is widely used in aviation turbine engine because of its excellent physical properties. Many precision parts of aviation turbine engine need to be processed with micro drill. When drilling nickel base alloy, the material work hardening phenomenon is serious, resulting in increased machining difficulty, serious tool wear and affecting the drilling quality. This paper analyzes the difficulties faced by nickel base alloy micro hole drilling, summarizes and discusses the micro drilling mechanism from the aspects of chip formation mechanism, drilling force and torque, drilling heat and drilling temperature, analyzes the wear form, influencing factors and wear mechanism of the bit, and discusses the factors affecting the hole processing quality such as burr, white layer, roundness, from the aspects of tool geometry, tool material some measures to improve the hole processing quality are put forward from the aspects of auxiliary drilling methods.
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Key words:
- micro drilling /
- nickel-based alloy /
- existing problems /
- wear of micro drill /
- processing quality
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