3D tool path Generation of CNC Curve Grinding by Using Arc-shaped Grinding Wheel

摘要

A new tool path generation was proposed in CNC grinding of curve surface by using arc-shaped grinding wheel. The tool paths are produced along wheel-axial direction on the off-set surface on which wheel center is positioned to make wheel working surface tangential to workpiece curve surface. The aim is to plan efficient tool paths in CNC curve grinding to improve ground surface. Before grinding, the arc-shaped grinding wheel was trued by mutual wear between grinding wheel and GC stick along arc-interpolation path. In curve grinding, the iso-scallop height was employed along wheel cutting direction to control the interval between adjacent tool paths in order to reduce tool paths. Grinding experiments show that the ground curve surface of harden steel may become smooth when the iso-scallop height decreases to 1 μm and the surface roughness may be less than 40 nm by using #180 diamond grinding wheel. It is confirmed that the iso-scallop height tool paths produced by tool path surface generation can be applicable to efficient, precision grinding of random curve surface.