Abstract: The invention provides a vertical turret lathe capable of preventing an inner diameter turning tool attached to a turret tool rest from interfering with a workpiece during machining of the outer diameter of the workpiece. The vertical turret lathe comprises a work table that holds a workpiece W1 and rotates, and a working head 40 having a turret tool rest 50 and capable of moving in X-axis and Z-axis directions. A tool holder 70 for holding an inner diameter turning tool T2 via hydraulic pressure is attached to a part of the tool supporting portions 60 of the turret tool rest. The automatic tool changer apparatus 100 includes a turret-type tool magazine 120 and pistons 160 and 162, which mechanically press the pins 74 and 76 of the tool holder 70 and clamp or unclamp the tool T2.

Abstract: A machine-tool turret-type unit includes a turret disk that is free to rotate about a rotational axis, and a housing on which to mount the turret disk is provided. The housing includes at least one securing device to be secured to the securing section of the machine tool. The securing device includes at least one securing surface to rest against the securing section of the machine tool. The rotational axis lies within a first plane defined by the securing surface(s).

Abstract: Described herein is an oscillating-drawer device for loading and unloading tools into/from the tool magazine of a machine-tool.

Abstract: A knife changing method is disclosed which is applicable to a veneer lathe equipped with a knife carriage to which a veneer peeling knife is clamped with its cutting edge set at a predetermined elevation relative to the knife carriage. The knife carriage is shiftable to at least one knife changing position and the lathe has formed in at least one of its side frames a knife passage adjacent the knife changing position of the carriage. In the knife changing operation, the knife carriage is firstly shifted to its knife changing position, where an old knife is released from the knife carriage by undoing knife clamps. The freed knife is laterally moved away from the veneer lathe through the knife passage in the side frame. Then, a new, or reground knife is moved laterally into the veneer lathe through the knife passage to a predetermined knife installing position on the knife carriage, where the new knife is fixed to the carriage by activating the knife clamps.

Abstract: In an automatic tool change system in a combined machining lathe, with rotational and planar movements of a tool change arm, tools are replaced with each other between magazine pots and first and second tool holders which are mounted to a turret so as to be directed to a rotation axis direction of the turret and to a rotation plane direction of the turret, respectively. A tool grasp part of the tool change arm includes first holding claws for inserting and withdrawing a tool into and from the first tool holder and second holding claws for inserting and withdrawing a tool into and-from the second tool holder. At a tool exchange position, each magazine pot is pivoted between a first exchange position where the magazine pot takes an attitude parallel to the first tool holder and a second exchange position where the magazine pot takes an attitude face to face with the second tool holder.