Schunk
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Tools for Robot-Supported Surface Machining

July 8, 2021
The new end-effector units help automate material removal processes -- reducing finishing time and costs, lowering injury risk of employee injury, and improving results.

SCHUNK’s AOV, MFT-R, and PCFC tool units make the changeover to automated surface machining easy and simple. Manufacturers can reduce time and costs, lower the risk of employee injury, and achieve better results by automating material removal processes with the help of a robot.

The AOV orbital sander tool is specially designed for grinding and polishing workpiece surfaces. The pneumatic unit is driven by a vane motor and achieves rotational speeds of 10,000 RPM. The axial bearing of the motor ensures compliance, and consistent contact forces act on the workpiece surface.

The contact force can be controlled in two directions via air connections. In other words, during extending and retracting, separate control is possible and may vary if required (range: 6.7 to 67 N.) This ensures that the AOV is machining with consistent contact force even in the case of overhead applications.

The orbital sander tool can be equipped with sanding discs of various diameters (125 mm respectively 5”, or 150 mm respectively 6”.) The grinding tool can be equipped with a suction connection for removed materials, thereby reducing contamination of the robot cell, which further avoids downtimes and results in cost savings.

The MFT-R is for manufacturers who require a particularly flexible and robust polishing spindle for polishing and brushing of workpieces with axial compliance. The spindle is equipped with a pneumatic vane motor with a maximum rotational speed of up to 5,600 RPM, but the rotational speed can be reduced to a minimum for achieving perfect surface end results.

The motor has a very short stopping time and therefore reduces the whole machining time.  Due to the gimballed bearing, the compensation force and radial compliance of the tool are individually adjustable. Depending on the pressure setting, compliance can be adjusted between 9 N to 70 N. The user can use the optimal value for any application, and therefore achieves high-quality and reproducible results in any installation position. Any workpiece tolerance can be compensated and clearly simplifies path programming of the robot.

The MFT-R also is user-friendly: due to the optional axis fixation, the changeover from pendulum to radial compensation is quick and easily possible. Therefore, different workpiece geometries can be flexibly machined with just one tool – this is an economic advantage and helps to cut investment costs almost in half.

The MFT-R is available as a stationary unit or can be flexibly mounted to the robot (axially or radially.) SCHUNK offers prefabricated adapter plates for these applications and valuable time can be saved when designing the process.

The PCFC unit completes the SCHUNK portfolio. If a workpiece must be machined with a previously defined force, the compensation unit renders excellent services. The PCFC ensures that a consistent compliance force is acting in any position, due to the position sensor. It compensates the weight force together with the pressure control valves provided by the customer. The PCFC can be combined with various tools and is therefore suitable for numerous application purposes. Learn more at www.schunk.com

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