Vertical machine tool with a movable main spindle

A vertical machine tool with a movable main spindle comprising:

• a base of said machine tool;
• the main spindle having an axis directed vertically to a floor surface and provided at a tip end with a chuck;
• a headstock, being movable at least in a first direction in parallel with the axis of said main spindle, for rotatably supporting said main spindle;
• a tool rest provided on said base and on which a single or a plurality of tools is mounted;
• and
• a splash guard, provided on said base, for covering a machining area of said machine tool,
• wherein said headstock or said tool rest is relatively movable in a second direction perpendicular to the first direction,
• a bar workpiece, having a longer axial dimension than a radial dimension and being kept to project at a predetermined length under the condition that the bar workpiece is inserted into said main spindle, is gripped by the chuck,
• said headstock and said tool of said tool rest move relative to each other to machine the bar workpiece into a predetermined shape, and a part which has been subjected to the machining is cut off as a machined workpiece in a predetermined position by a cut-off tool, and
• wherein said machine tool further comprises:
• a cut-off tool holding means, mounted on or changeably provided on said tool rest and holding said cut-off tool, for adjusting a position of said cut-off tool in the first direction for cutting the bar workpiece;
• a discharge port, provided in said splash guard, for discharging the machined workpiece to the outside of the machining area;
• and
• a workpiece transfer means, provided on said base and provided with a workpiece receiving member for receiving the machined workpiece from the chuck, for moving the workpiece receiving member to a receiving position for receiving from the chuck the machined workpiece having been cut off by said cut-off tool and to a discharging position corresponding to the discharge port,
• wherein the position of said cut-off tool in the first direction is adjustable by said cut-off tool holding means, so that a distance between a lower end of the bar workpiece and a bottom surface of said workpiece receiving member is kept in a predetermined dimensional range when said workpiece receiving member is located at the receiving position and said cut-off tool is cutting the bar workpiece.