复杂曲面型面柔性砂带磨削关键技术研究

Research on Key Techniques of Belt Grinding for Complex Curved Surface

根据曲面型面砂带磨削的特点和要求,在分析曲面型面砂带磨削所需控制运动基础上,建立了砂带磨削运动关系模型;讨论了曲面型面砂带磨床的可行性结构方案,完成了磨床机械结构的开发和设计;针对柔性砂带磨削精度难以控制问题,提出了通过控制磨削压力实现对磨削深度的控制,开发了可控磨削力的砂带磨头;以UG/API为开发工具,在UG平台上开发了砂带磨削编程系统,包括对磨削力的编程控制;基于工控机+运动控制器平台开发了曲面型面砂带磨削专用数控系统。通过一个个关键技术研究,最终研制完成可控磨削力的六轴联动数控砂带磨床样机产品,经对汽轮机叶片曲面型面实际磨削试验验证,所研制的砂带磨床样机产品满足曲面型面零件光整加工要求。

It presents the key techniques of grinding complex curved surface with abrasive belts. Based on its characteristics and special requirements, it establishes a model for the motion of abrasive belts when grinding curved surface. It shows detail about a mechanical structure for grinding machine with abrasive belts. Regarding to the controlling issue for belt grinding, it controls the desired grinding depth with adjustable pressure, develops a programmable system to control the grinding force with UG as the platform. Based on the industrial computer and the motion controller, it designs a specialized numerical control system and a six axis synchronous NC grind- ing machine. Testing of grinding steam turbine blade surfaces with this sample grinding machine is performed and the results meet all the surface finish requirements.