WERKZEUGHALTEVORRICHTUNG FÜR HOCHGENAUE KALIBRIERUNG VON LÖCHERN

摘要

The invention relates to the field of toolings for high-accuracy finishing through-holes and non-through-holes, such as for example for calibration, lapping operations. More precisely the invention refers to a tool-holding system for high-accuracy calibration of the type comprising a driving shaft ( 2 ) and a driven shaft ( 3 ) mutually connected by two cardan joints ( 5 ) and that provides an external cylindrical body ( 6 ) supported through bearings ( 8 ) by said driving shaft ( 2 ). The cylindrical body or liner ( 6 ) is closed on its bottom side by a driving bush oscillating in a plane perpendicular to the driven shaft rotation axis; said oscillations being compensated by elastic means. Axial compensation means for driven shaft movements are also provided. The liner ( 6 ) forms a chamber ( 7 ) that is kept full of oil.