- Machine tool, a main spindle hollow and has the following description of advance of the bar to be machined, which associates

摘要

Machine - tool a main spindle hollow horizontal. / p & & p & the said spindle 4, contains a main core 6 intended to grip a bar to be machined, and the front of which is a machining zone in which the end front of the bar w advance intermittently, through the chuck 6, for each machining cycle ensures, by a tool selecte mounted on a turret 14 which rests on the mobile carriages along orthogonal axes, a support 47 supports the end front of the bar w at the start of each cycle of the intermittent advance and guide a stable manner, this bar is made up in machining position, without relation to the rotation of the pin 4, which makes it possible to ensure continuous advance and the machining of the bar not discontinue the spindle 4. / p & & p & the invention makes it possible, the intermittent advance of the bar to be machined with each machining cycle of a machine - tool of this type.