The numerically
controlled horizontal boring machine VH 3 CNC serves for boring holes
into elements of tubular shape. Loading and unloading of the
workpieces is manual, the subsequent operation of the machine is
automatic controlled by preprogrammed data.
The basic portion of
the boring machine is a 3D-rigid welded frame. The machined surfaces
of the frame carry both the vertical and horizontal spindle head. The
horizontal head comprises three boring spindles, driven via tooth
belts from an asynchronous motor. Feed of the spindles is obtained by
a drive from a hydraulic cylinder with multiplicator.
The spindle head is mounted on linear roll guide. The vertical spindle
head serves for mounting the parts to be bored. It consists of three
vertical spindles. The upper portion (passively rotated clamping
centres) - driven and the lower portion - driving centres. The
workpieces to be bored are inserted onto the lower spindle portion and
after start of the automatic cycle are gripped by passively rotatable
clamping centres (upper portion). Radial rotation of the vertical
spindles is obtained by a stepping motor with epicyclic gear. The
vertical head is feed vertically by a stepping motor with epicyclic
gear and ball screw. The spindle head is mounted on a linear ball
guide. Optimum cutting conditions in boring are obtained by providing
each spindle with a flexible hose for the supply of coolant. The whole
machine features standard covers. The space of the vertical spindle
head is fitted with a watertight cover for evacuation of coolant and
chips into a collecting through. The boring
machine is controlled from a freely programmable automatic permitting
via an operating panel the change of technological modes with possible
diagnosing of its faults. The number of finished parts is recorded by
both a daily counter and a totalizing counter.
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