先进的五轴铣削设备与手艺打磨抛光在工艺水平上的不匹配,已经成为制约叶片职业快速开展的瓶颈。这在以核电叶片为代表的大型叶片和以航空发动机叶片为代表的小叶片制作过程中,表现尤为杰出。
关于以核电汽轮机叶片为代表的大型叶片来说,体积巨大(我国CAP1400型压水堆核电机组的末级叶片长度超越2米,重量大于280公斤)、型面复杂、精度要求高,采用手艺打磨抛光越来越困难,功率低下,加工质量难于确保,然后影响通流、影响热功率;此外手艺打磨抛光叶片一致性差,然后影响动平衡、影响机组运行安全。
而关于以航空发动机叶片为代表的小叶片来说,又成为另一个极端,叶片长度多小于100mm,型面弯、扭、掠,进排气边厚度只要0.1—0.2mm(1—2张百元纸币厚度),综合轮廓误差<0.05mm,手艺磨削抛光很简单形成叶片烧伤和轮廓损坏,型面精度底子不能确保。发动机叶?型面制作质量正是影响我国发动机制作水平,从而影响各类飞机性能的关键因素。
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