Machining of castings using industrial robots. Today, robot machining presents a new economic and technological dimension. The tasks of a CNC machine can be performed by a standard industrial robot (see also Robot), maintaining flexibility (Fig. 1, Fill GmbH).
Principle: Usually, the original robot controller is replaced by an enhanced CNC controller (e.g. “trueCNC” controller according to DIN 66025 from Fill GmbH). It controls the entire robot kinetics and provides all functions required for CNC programming. Additional servo stabilizers integrated at the individual axes of the industrial robot allow for a stable and controllable chip removal process. They ensure reproducible machining in line with the required dimensional tolerances. Feed rate and thereby productivity can be increased by appropriately reinforcing the robot. The large range of movement and adaptability of 6-axis articulated robot kinetics to the desired machining provide for freedom and flexibility in the machining process. Robot machining cells (e.g. ROBMILL CNC PLUS from Fill GmbH in Fig. 2, technical data in Table 1) are of particular benefit for foundries in the range of small- and medium-series production. The advantages involved in robot machining are:
Fig. 3 shows an industrial robot removing risers from the casting.
Video 1:Robot machining with ROBMILL CNC PLUS from Fill GmbH
Video 2: Frettling with robots, source: Fill GmbH