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US 4,539,972 AGranted
Method for the multiple lap-cutting of crystal blocks with continuous shortening of the blade excursion
AssigneeHeliotronic Forschungs-und Entwicklungsgesellshaft fur Solarzellen-Grunds toffe
InventorsWolfgang Ermer, Klemens Muhlbauer
Life of this patent
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Abstract
In the multiple lap-cutting of crystal blocks, the blade excursion is shortened continuously by a connection between the rotating drive crankhead and the connecting rod system which transmits the force to the gang saw which is moved toward the center of the drive crankhead during the sawing process.
Claims6
A method for the multiple lap-cutting of monocrystalline and polycrystalline rods or blocks, comprising the steps of:
- providing a connecting rod system for connecting a cylindrical crank pin having a longitudinal axis, of a rotating drive crankhead to a clamping frame having a blade pack held in the frame, so that rotation of the crank pin about a central axis of the crankhead parallel to the longitudinal axis of the crank pin causes lateral reciprocating movement of the clamping frame and blade pack in a suspension of a lapping agent through a workpiece to be cut, the length of each cutting stroke of the blade pack related to the distance between the longitudinal axis of the crank pin and the central axis of the crankhead;
- rotating the crankhead about the central axis thereof to cause the crank pin to circumscribe said central axis so that the blade pack undergoes said lateral reciprocating movement;
- and
- continuously decreasing the distance between the longitudinal axis of the crank pin and the central axis of the crankhead, so as to continuously shorten the cutting stroke of the blade pack during the cutting operation.
1 more element
Dependencies are inferred from the claim text.