2D Rotation-Symmetric Surface Polishing

The robotic machine system, RAP can be designed for precision polishing of 2D rotation-symmetric workpieces and has the capability to polish outer and inner curvatures as well as end surfaces.

The workpiece is clamped and positioned in the main rotating spindle of the polishing machine, whereas the polishing tool is fixed to the robot arm while directed to the targeted surface section of the workpiece.

The workpiece can be a tool for metal forming or injection molding but is also applicable for other types of workpieces like cylinders, tubes, and discs. The workpiece can be of tool steel, tungsten carbide, or other materials which may be subject to individual confirmation.

Process programming of the polishing machine is based on a CAD file, and the application software offers the setting of the following polishing process parameters: Rotational speed of the main spindle, speed of the polishing tool, contact force to the workpiece, contact angle of the polishing tool to the surface of the workpiece, robot feed speed, and number of polishing passes of each defined segment of the workpiece subject for precision polishing.

The robot polishing process can be programmed with oscillating tools, rotating spindle tools, and simple, stationary polishing sticks. The surface polishing can be made with different stones, brass, acrylics, wood, or other media combined with oil and/or diamond paste. In short, the robotic polishing process can be compared with manual polishing.

As recognized with manual polishing, the incoming surface quality of the workpiece has a great influence on the polishing process and machine time, and the achievable surface finish. When optimizing the interface and interdependence between the pre-machining process of the workpiece with robot polishing, a surface finish at Ra 0,02-0,04 µm and Rz less than 0,1 µm is achievable in a consistent and repetitive manner, and principally independent of the machine operator and production batch.

Further information about RAP can be found on the technology section here.

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