Patent ID: 7775858

Claim:
A machine for dressing the edges and outer surfaces of flat workpieces including a machine frame with a workpiece support surface and at least two dressing heads each with a respective work tool carrier which is rotatably supported on the machine frame for rotation about a respective first axis perpendicular to the workpiece support surface, and each work tool carrier is drivable by a drive and carries at least two work tools which are rotatably supported on each respective work tool carrier eccentrically to each respective first axis for rotation about second axes perpendicular to the workpiece support surface and each respective work tool drivingly connects with a respective planet gear which drivingly meshes with a sun gear fixed to the frame coaxial to each respective first axis, so that when rotating each work tool carrier defines a working circle of the at least two work tools, wherein at least two dressing heads are so arranged substantially laterally next to one another that the working circles of the respective work tools overlap one another, with the rotation of each respective work tool carrier of neighboring dressing heads being so controlled that the at least two work tools arranged on each respective work tool carrier of the neighboring dressing heads is displaced from one another in the circumferential direction about each respective first axis, wherein each work tool carrier is beam-shaped and carries the at least two work tools, and each respective work tool carrier of the neighboring dressing heads is displaced by 90° with respect to one another, and wherein each respective work tool carrier of the neighboring dressing heads is driven in opposite directions of rotation.