Error control of non-equal diameter machining of globoidal cam profile based on adaptive method

In order to effectively tackle the machining error of globoidal cam profile, an adaptive compensation method of tool position error was proposed. The actual profile equation of the non-equal diameter machining of globoidal cam was constructed through the space meshing principle and the rotation transformation tensor method. To minimize the maximum deviation of the actual tool axis was regarded as an objective, and then the adaptive compensation of the tool position was performed through searching the optimal tool offset amount and direction during the machining process. When tool radius compensation amount Δ r was the value optimized by the adaptive method, the theoretical maximum value of the normal error of globoidal cam was closest to the simulation result. The validity of the error control technique of tool position of the adaptive method was verified by the simulation results and calculation. Consequently, the machining accuracy of the globoidal cam in non-equal diameter machining is improved greatly.