Patent ID: 8911281

Claim:
A method for trimming two working layers including bonded abrasive applied on mutually facing sides of an upper and a lower working disk of a grinding apparatus configured for simultaneous double-side processing of flat workpieces, the method comprising: providing the grinding apparatus including the upper and lower working disks; providing at least one carrier including an outer toothing; rotating the upper and lower working disks; moving the at least one carrier between the rotating working disks using a rolling apparatus and the outer toothing on cycloidal paths relative to working layers of the working disks, adding loose abrasive to a working gap formed between the working layers, moving the at least one carrier, without workpieces inserted therein, in the working gap so as to effect material removal from the working layers; wherein each of the working layers is elastic and is detachable from a respective working disk by a peeling movement and includes at least the three following layers: a useful layer, facing away from the working disk, including bonded abrasive and having a useful thickness of more than one abrasive grain layer; a central continuous support layer supporting the useful layer and connecting elements of the useful layer to form a continuous unit; and a mounting layer facing the working disk and forming a force-locking or positively locking composite assembly with the working disk over a period of a usable life of the useful layer.