车削颤振稳定性预测软件研究与开发

针对金属加工过程中颤振预测软件实现的工程需求,设计了车削加工颤振稳定性叶瓣图实验测试软硬件系统,研究了软件实现算法中的关键问题.首先,搭建了由采集卡、加速度传感器、模态力锤组成的硬件系统,开发了具有频响函数测试和稳定性叶瓣图生成功能的系统软件.其次,设计了交互式软件采集及分析界面,研究了基于C#编程语言频响函数测试过程中多通道高速同步触发采集的实现算法,开发了具有由频域分析方法获得颤振稳定性叶瓣图功能的C#类.最后,对CJ0625车床加工系统进行稳定性预测,结果表明软件预测结果与实验结果相吻合.

Research and Development of the Prediction Software for Turning Chatter Stability

In view of the engineering need for predicting chatter with software in metal processing， the hardware and software system for the chatter stability lobe diagram test in the turning process was designed. Some key problems existing in the algorithm of the software were researched. Firstly， the hardware system was built， which was composed of an acquisition card， an acceleration sensor and a modal force hammer. The software system， which was able to obtain FRF (frequency response function) of the tool and stability lobe diagram of a turning machine， was developed. Secondly， the interactive interfaces of acquisition and analysis were designed. The multi-channel high-speed synchronous trigger-acquisition algorithm in FRF testing based on C# language was studied. The class of C# to analyze the chatter stability lobe diagram was developed using the frequency domain analysis method. Finally，the stability prediction of CJ0625 was conducted. The results showed that the predicted results of the software coincide with the experimental results.