Patent ID: 8746227
Filing Date: 2014-06-10
Classification: B23D,B28D

Abstract:
1. A method for slicing wafers from a workpiece, the method comprising: providing wire guide rolls each having a core and a coating with a specific thickness and an axial length, wherein a fixed bearing having an axial length is associated with each of the wire guide rolls; providing rings at opposing ends of the coating of at least one of the wire guide rolls, the rings being fixed exclusively to the coating; providing a sawing wire including wire sections disposed in a parallel fashion, the wire sections being tensioned between the wire guide rolls; moving the wire sections of the sawing wire relative to the workpiece so as to perform a sawing operation; measuring a change in the axial length of the coating by measuring distances between sensors and the rings, the change in the axial length being brought about by a temperature change; measuring a change in the axial length of the fixed bearing associated with the at least one of the wire guide rolls; and cooling the wire guide rolls and the respective associated fixed bearings in a manner independent of one another and dependent on the measured change in the axial lengths of the coating and of the fixed bearing.