On-line tool-workpiece contact detection is based on cutting forces signal

摘要

Very small tool dimensions in the micro-milling process make finding a contact of the tool and the workpiece unrealistic without a microscope. Automating the process helps the machine operator and eliminates human errors. Information about tool location according to workpiece is crucial for performing micro-milling correctly. Workpieces prepared for micro-milling processes can have different dimensions after machining operations. There is a need to find the "zero" point of workpiece surface in tool axial direction (Z).