Grinding belt unit for double-sided sheet metal processing

A grinding belt unit for a sheet metal processing machine with continuous operation, comprising:

• a grinding belt for grinding a workpiece passing through the sheet metal processing machine;
• a contact roller for contacting the grinding belt with the workpiece in a processing area and for deflecting the grinding belt, wherein a rotation axis of the contact roller is oriented substantially transversely to a pass-through direction of the workpiece;
• a deflection roller for deflecting the grinding belt outside the processing area, wherein a rotation axis of the deflection roller is oriented substantially transversely to the pass-through direction;
• a first carrier and a second carrier, which are oriented substantially transversely to the pass-through direction, wherein the first carrier is connected on both sides to a bearing of the deflection roller at a fixed distance, the second carrier is connected on both sides to a bearing of the contact roller at a fixed distance and a distance between the first and the second carrier is variable;
• a tension unit for adjusting the distance between the first and the second carrier to adapt a tension of the grinding belt, wherein the tension unit comprises two actuators, which are each arranged in the region of ends of the two carriers;
• a rotation carrier, which is arranged between the second carrier and the contact roller and is rotatably connected to the second carrier about a central axis extending perpendicular to the pass-through direction;
• and
• an oscillation unit for changing an angle between the second carrier and the rotation carrier to counteract oscillation and/or slipping off of the grinding belt.