5-axis Numerically Controlled Electrochemical Contour Evolution Grinding

摘要

In order to solve the problem of finishing the twisted blade surface of integral impeller, the research on 5-axis Numerically Controlled Electrochemical Contour Evolution Grinding (NC-ECCEG) is being carried on. Over-cutting error of NC-ECCEG the twisted blade surface generated by parallel lines was analyzed. The formula of calculating the over-cutting error was inferred, The method to eliminate the over-cutting error was presented, that is, to use the conical grinding wheel and combined 5-axis linkage NC -ECCEG system. The structure and the movement of NC-ECCEG machine tool, the combined multi-axis NC system and its linkage control technology were introduced. Furthermore the mathematical model of NC-ECCEG unparallel-ruled surface was made. An auto-programming system in 5-axis Numerically Controlled Electrochemical Contour Evolution Grinding was developed and it is applied to grinding the integral impeller. The machining efficiency of electrochemical grinding can be 12 or more times better than that of manual polishing operations. This new machining method can be used to final finishing of mould surface.