This study proposes a stylization method for gear tooth surface using slices of 2-dimensional spectrum. Focusing on a contour (or a slice in the z direction) of the curved surface generated by the 2-dimensinal spectrum, we could approximate the contour to a closed curve, and obtain the ‘scale’ parameter and the ‘shape’ parameter such as a radius, an aspect ratio, etc. which form the closed curve. To determine the flexibility of the proposed method for stylizing the surface texture of gear, this paper shows the approximating the 2-dimensional spectrums which are obtained by frequency analysis of the surface textures of gears with different machining processes using closed curve. As a result of the template matching using astroid, it was found that the astroid can approximate the contour of the 2-dimensinal power spectrum of the gear tooth surface with five machining processes, hob, generation grinding, form grinding, hone and barrel.
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