STOCK BAR GUIDING DEVICE FOR MULTI-SPINDLE LATHES

摘要

Guide-bar device for a multi-spindle lathe having a barrel indexed by the lathe at each machining operation and secured to a rear part of the lathe. The barrel comprises a central shaft and a plurality of guiding tubes removably supported by a means of disks provided on the central shaft, each guiding tube enclosing a bar to be machined. The bar rotates within the guiding tube in a fluid and is supported by and advanced under the influence of a piston which bears against the rear part of the bar. A fluid distributor is secured to the multi-spindle lathe at the rear part of the barrel. The fluid distributor is connected to at least one source of hydraulic pressure for distributing fluid under pressure into distributing grooves which are connected to a rear part of the guiding tubes for causing the piston to advance in said guiding tube and to a plurality of pipes connected to said guiding tubes for causing a radial injection of the fluid between said bar to be machined and the guiding tube thereof.