System of variable hydrostatic guideway for vertical lathes and a vertical lathe that includes said guideway

摘要

A variable hydrostatic track system for vertical lathes includes
a plurality of sectors arranged between the periphery and the central opening of an annular base. Each sector includes an upper housing with a hydraulic fluid outlet such that when the injected hydraulic fluid overflows from the housings, it forms a film between the rotating chuck and the sectors. The track system further includesa positioning mechanism having a plurality of hydraulic cylinders fixed on the annular base in a radial direction between the central opening and the sectors. The rod of each hydraulic cylinder is coupled to a piston and to one of the sectors.;Each sector is guided in a radial guidance element such that, due to the action of the hydraulic cylinder, the sector is movable between an inner radial position and an outer radial position.

主权项

1. Variable hydrostatic track system for vertical lathes which comprises an annular base arranged between a support base and a securing rotating chuck of a vertical lathe, a central opening in the annular base which surrounds a rotation shaft of the rotating chuck; a plurality of sectors forming a circle and projecting vertically between a periphery of the annular base and the central opening of the annular base, each sector comprising an upwardly open upper housing;
at least one hydraulic fluid outlet arranged at the bottom of each housing and which allows injecting hydraulic fluid into the corresponding housing such that, when the injected hydraulic fluid overflows from the housings, the hydraulic fluid pushes the rotating chuck upwards, forming a film of hydraulic fluid between the rotating chuck and the sectors; and further comprising a positioning mechanism capable of positioning the sectors at least in an inner radial position in which at least one part of the sectors is arranged at a circumference of a minimum diameter and in an outer radial position in which at least one part of the sectors is arranged at a circumference of a maximum diameter.