Patent ID: 6012884
Filing Date: 2000-01-11
Classification: B23Q,Y10T

Abstract:
A logical structure of a frame of a machine tool enabling displacements of a movable mechanism along three axes X, Y and Z, comprising:two transverse horizontal guide rails disposed in parallel in a vertical plane P(x,y) and enabling horizontal displacements of the movable mechanism along the X axis,two lateral vertical guide rails disposed in parallel in the same vertical plane P(x,y) and enabling vertical displacements of the movable mechanism along the Y axis, perpendicular to the X axis,two longitudinal horizontal guide rails disposed in parallel in a horizontal plane P(x,y) and enabling horizontal displacements of the movable mechanism along the Z axis, perpendicular to the X and Y axes,wherein the two longitudinal horizontal guide rails are, on the one hand, situated one on each side of the vertical plane P(x,y) defined by the two axes X and Y, such that a center of gravity of the movable mechanism is as close as possible to the vertical plane P(x,y) of the displacements along the X and Y axes and, on the other hand, are mounted to be slidable along the Y axis between the two lateral vertical guide rails which are mounted to be slidable along the X axis between the two transverse horizontal guide rails,wherein different translational movements of the logical structure are ensured by linear motors associated with the pairs of guide rails, andwherein a front portion of the movable mechanism is unencumbered by drive mechanisms and passes through a telescopic cowling which follows movements of the movable mechanism and separates a drive station from a machining station.