机器人自动加工叶轮焊口工艺试验

Study of robot automatic machining for welding groove of complex integral impeller

为了实现对半开式叶轮轮缘面盖盘焊接坡口的加工去除,开展了机器人自动加工坡口的实验研究。利用自行搭建的机器人自动加工系统,以圆柱形旋转锉刀作为加工工具,对轮缘面盖盘坡口进行加工,并建立材料去除模型。利用Matlab软件对材料去除率理论方程进行仿真,分析各切削参数对材料去除率的影响规律。通过单因素实验验证了理论分析的正确性,基于正交试验确立了最佳切削参数组合。结果表明,该系统可以完全替代人工操作实现自动化加工,加工质量稳定,效率高;在一定范围内,材料去除率与进给速度、刀具转速、径向切削深度和切削宽度成正比,且径向切削深度对其影响较大,切削宽度和进给速度的影响次之,刀具转速对其影响最小。

In order to achieve the machining removal of the impeller welding groove,an experimental study was carried out for the automatic machining of the impeller welding groove by robot.A self-built robot automatic machining system platform was used to process the impeller welding joint with a cylindrical rotary file as a machining tool,and a material removal model was established.The theoretical equation of material removal rate is simulated and analyzed by using Matlab software.The single factor experiment verifies the influence rule of main processing parameters on material removal rate.The optimum combination of process parameters was established based on orthogonal test.The results show that this platform system can completely replace manual operation to achieve automatic processing,with stable processing quality and high efficiency.In a certain range,the material removal rate is directly proportional to the feed speed,cutting speed,radial cutting depth and axial cutting depth,and the radial cutting depth has a greater impact on it,the axial cutting depth and feed speed of the second,the spindle speed has the smallest impact on it.