Vertical lathe

Patent metadata

Field	Value
Publication number	US-10632543-B2
Application number	US-201615779196-A
Country	US
Kind code	B2
Filing date	Nov 4, 2016
Priority date	Nov 30, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A vertical lathe, including: a headstock provided on the upper side of a base so as to be capable of moving in the lateral direction and the vertical direction; a main spindle rotatably supported by the headstock; a workpiece chuck provided at the lower end section of the main spindle; a turret support stand provided so as to be capable of moving in the longitudinal direction orthogonal to the lateral direction and the vertical direction; an actuator for moving the turret support stand in the longitudinal direction; a turret having tool mounting parts provided at a plurality of circumferential positions, the turret being supported by the turret support stand so as to enable turn-indexing about the axis in the longitudinal direction; and a plurality of processing tools attached at each of the tool mounting parts so as to be set apart from each other in the longitudinal direction.

First claim

The invention claimed is:

1. A vertical lathe comprising:
a base;
a headstock disposed above the base, the headstock being movable in a lateral direction and a vertical direction;
a main spindle rotatably supported about an axis in a vertical direction with respect to the headstock;
a workpiece chuck disposed at a lower end portion of the main spindle, the workpiece chuck detachably holding a workpiece;
a main spindle drive motor that rotatably drives the main spindle;
a turret carriage disposed to be movable with respect to the base in a front/back direction that is perpendicular to the lateral direction and the vertical direction;
an actuator secured on the base to move the turret carriage in the front/back direction;
a turret comprising a plurality of tool mounting portions disposed at a plurality of positions in a circumferential direction, the turret being supported by the turret carriage to be rotatably indexable about an axis in the front/back direction; and
a plurality of machining tools being attached apart from each other in the front/back direction at the plurality of tool mounting portions,
wherein
the turret further comprises first tool holders secured at a plurality of positions in the circumferential direction on a front surface of a holder mounting base, and second tool holders secured at a plurality of positions in the circumferential direction on the front surface of the holder mounting base,
each of the plurality of tool mounting portions is formed of a pair of the first tool holder and the second tool holder arranged facing each other with a space in the circumferential direction of the turret,
as the plurality of machining tools, a plurality of first machining tools having first cutting edges secured at tip portions are attached to the first tool holder on a surface facing the second tool holder at positions apart from each other in the front/back direction, so that the plurality of first machining tools protrude in the circumferential direction of the turret, and
a plurality of second machining tools having second cutting edges secured at tip portions are attached to the second tool holder on a surface facing the first tool holder at positions apart from each other in the front/back direction, so that the plurality of second machining tools protrude in the circumferential direction of the turret.

2. The vertical lathe according to claim 1 , wherein
the plurality of first machining tools attached apart from each other in the front/back direction at each of the tool mounting portions are of a single type.

3. The vertical lathe according to claim 2 , wherein
the plurality of second machining tools attached apart from each other in the front/back direction at each of the tool mounting portions are of a single type.

4. The vertical lathe according to claim 1 , wherein
the plurality of machining tools attached apart from each other in the front/back direction at each of the tool mounting portions are of different types.

5. The vertical lathe according to claim 1 , wherein
the vertical lathe further comprises a flow passage connection unit that is secured on the turret carriage, the flow passage connection unit comprising a plurality of first oil supply passages, each of which is connected to a high pressure oil supply pump via an electromagnetic on/off valve,
the turret comprises a plurality of second oil supply passages that can be connected to an outlet port of each of the first oil supply passages when the turret is rotated,
the plurality of second oil supply passages are connected to tool-side oil passages that are formed in the plurality of machining tools, and
the vertical lathe is structured such that a cutting oil agent supplied from the high pressure oil supply pump side can be ejected from each of the tool-side oil passage towards a cutting edge of the machining tool in use for machining.

6. The vertical lathe according to claim 5 , wherein the vertical lathe further comprises:
a hydraulic cylinder unit comprising a rod connected to the flow passage connection unit on the opposite side to the turret, and
a control panel that controls supply of hydraulic pressure to the hydraulic cylinder unit such that when the turret starts rotation, the rod of the hydraulic cylinder unit retracts to the opposite side to the turret, whereas when the turret finishes rotation, the rod moves forwards to a turret side.

Assignees

• Kanzaki Kokyukoki Mfg Co Ltd

Inventors

• Shimomura Yoshinobu
• Higaki Masao

Classifications

• B23B29/242 Primary

  Turrets, without description of the angular positioning device (turret lathes for turning individually-chucked workpieces B23B3/16; turrets with manually operated angular positioning devices B23B29/282; turrets with power operated angular positioning devices B23B29/323) · CPC title

• B23Q11/1023

  Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle · CPC title

• B23B3/161 Primary

  lathe with one toolslide carrying one turret head · CPC title

• B23Q2039/004

  Machines with tool turrets · CPC title

• B23Q39/027

  consecutive working of toolheads · CPC title