INTERNAL SELF-CENTRING REST Russian patent published in 2015 - IPC B23Q1/76 

FIELD: machine building.

SUBSTANCE: self-centring rest contains directing, intended for installation in the centres of the machine tool, and supporting rollers. The self-centring rest is fitted with the housing installed with a possibility of axial movement on the guide, along the whole length of which the long slot is made, from one side the drive is joined to the housing, and from another one - the cover, in the central hole of which a key is fixed, with a clearance installed in a longitudinal slot of the guide. The drive has a stem-piston, the stem part of which is designed conic on the end and passes inside of the self-centring rest housing, in which with a possibility of rotation in a longitudinal plane and the support on the conic part of the rod-piston the levers are installed, on the other end of which the named supporting rollers are installed, turned at the angle α with reference to the plane passing through the centre of the roller perpendicularly to the axis of the self-centring rest. The levers are designed with a possibility of spring-loading to the rod-piston.

EFFECT: improvement of geometrical precision of outside surface of rotation, ensuring of stability of shapes and sizes by increase of equality of wall thickness of obtained articles.

4 dwg