关键词: 非圆曲面, XY直驱, 廓形误差, 前馈交叉耦合

Abstract: Processing the non-round parts on XY direct-drive platforms,the contour error could not be reflected by X,Y axis tracking error,and the direction of the contour error was closely related with the following error and the profile shape irregularities,which was difficult to compensate the contour error.Aiming at this problem,the non-circular parts processing mechanism on XY platform was analyzed,and the XY axis tracking error coupling form contour error calculation model for the outer surface and inner surface processing was proposed respectively.The XY direct-drive simulation model was constructed,and the modified heart-shaped curve outer surface and inner surface processing was taken as the example to contrast the conventional processing control simulation experiments with feed forward cross-coupled contour of error compensation.The proposed tools path method was used to further verify the XY contour error model,and the results showed that the XY contour error model had very high accuracy and the feed forward cross-coupling controller could effectively improve the contouring accuracy of the XY platform.

Key words: non-circular surface parts, XY direct-drive, contour error, feed forward cross-coupled