Influences of linear interpolation method and cutting parameters on machined surface texture in large curvature surface milling

Abstract

Large curvature surfaces are often milled by straight-line interpolation method. However the misuse of the cutting parameters may lead to checkerboard texture on the machined surface. In this paper, the effect of interpolating straight-line length and tool path on the checkerboard texture on the milled surface is studied. The checkerboard texture is measured and characterized in terms of surface micromorphology and profile shape. Influences of the interpolation line length and milling path on the appearance of the checkerboard texture are analyzed. The influences of feed per tooth and pick feed on the checkerboard texture are discussed. Results show that linear interpolation method is readily to cause formation of the checkerboard texture on the milled surface of a workpiece. With the increase of the length of the interpolation line the present of checkerboard texture on the milled surface becomes more obvious, and vice versa. The bright and dark bands of the checkerboard texture are always perpendicular to the curvature plane of the milled surface. The feed per tooth and pick feed may influence the appearance of checkerboard texture as well.

Keywords

• curved surface
• ball-end milling
• surface texture
• linear interpolation