In-Process-Gauging

Integrating in-process gauging with the machine control allows automatic measurement of the bore diameter during the drilling cycle. The gauge measures the bore immediately after drilling and the control records the data, adjusts parameters, or alerts the operator. I have implemented these systems on several production machines and the improvement in quality consistency has been substantial. System Architecture and Components The in-process gauging system consists of a measuring probe, a data interface, and the CNC control integration. The measuring probe can be an air plug or a contact probe mounted near the spindle or on a separate slide. ...

How In-Process Gauging Works In-process gauging measures the bore diameter immediately after the drill retracts, while the part is still in the machine. The gauge enters the bore at the end of each drilling cycle and takes readings at programmed depths. The two main types I work with are air gauging and contact probing. Air gauging uses a small plug with orifices that measure the gap between the plug and the bore wall. Contact probing uses a mechanical finger that touches the bore surface and sends a signal through the machine’s probe receiver. ...