大型CNC机床柔性随行夹具的开发与实现

Development and Application of Flexible Fixture for Large CNC Machine Tool

为了解决大型结构件数控加工时,传统加工固持技术工装数量多、工艺准备时间长、加工连续性差等问题,设计了一种柔性随行夹具。该夹具采用旋摆气缸代替传统压板,根据机床刀具运行轨迹自动控制夹具避让主轴刀头,同时可通过调节压板长度以适应不同形状的工件,具备一定的柔性扩展能力,可应用在三坐标双主轴数控龙门铣床——V22500B或性能参数类似的数控机床上。

In order to solve the problems of the traditional processing technology,which includeds large quantity of tooling,long process preparation time and poor continuity of processing,a kind of new flexible accompanying fixture was designed.The fixture adopts the rotary cylinder instead of the traditional pressing plate,which can be automatically controlled for awoiding the spindle head according to the running track of the machine tool.Meanwhile,the flexible expansion ability of the accompanying fixture can be realized by adjusting the length of the pressing plate to adapt to the structural parts of different shapes.The flexible fixture can be applied to the three coordinate double spindle CNC milling machine—V22500B or similar performance parameters of CNC machine tools.