# US 8,887,362 B2 · Turning tool holder used for a combined lathe apparatus

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- Number: US 8,887,362 B2
- Document ID: US8887362B2
- Status: Granted
- Kind: B2
- Application number: 13/689,477
- Filed: 2012-11-29
- Published: 2013-04-11
- Granted: 2014-11-18
- Earliest claimed: 2007-05-16
- Assignees: Yamazaki Mazak Corporation
- Applicants: Yamazaki Mazak Corporation
- Inventors: Shoji Momoi; Toshihito Okuda; Hiromasa Yamamoto
- Web page: https://patentgrep.com/patent/US8887362B2

## CPC

- B23B 3/161: {lathe with one toolslide carrying one turret head}
- B23Q 3/1572: {the storage device comprising rotating or circulating storing means}
- B23B 1/00: Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
- B23B 3/06: Turning-machines or devices characterised only by the special arrangement of constructional units (B23Q37/00 takes precedence; such features of general applicability B23Q)
- B23B 3/065: {Arrangements for performing other machining operations, e.g. milling, drilling}
- B23B 29/26: Tool holders in fixed position
- B23Q 3/15513: {the tool being taken from a storage device and transferred to a tool holder by means of transfer devices}
- B23Q 3/15713: {a transfer device taking a single tool from a storage device and inserting it in a spindle (B23Q3/15793 takes precedence)}
- B23Q 11/001: {Arrangements compensating weight or flexion on parts of the machine (adjustment of the fluid layer in fluid bearings or cushions depending upon the position of a weight B23Q1/385)}
- B23Q 3/1578: {for tool transfer in a machine tool with a horizontal and a vertical spindle; for tool transfer in a machine tool with a spindle having variable orientation}
- Y10T 29/5109: Lathe
- Y10T 29/5114: Lathe and tool
- Y10T 82/10: Process of turning
- Y10T 82/2506: And tool turret
- Y10T 82/2508: with tool turret
- Y10T 82/2524: Multiple
- Y10T 82/2561: Spindle or work angler
- Y10T 82/2585: Tool rest
- Y10T 82/2587: Turret type holder [e.g., multiple tools, etc.]
- Y10T 83/088: Responsive to tool detector or work-feed-means detector
- Y10T 409/309352: Cutter spindle or spindle support
- Y10T 483/1705: Tool support comprises rotary spindle
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A carriage is moved in a direction including a Y axis component in order to move a turning process tool that is attached to a tool spindle along a horizontal line that is perpendicular to a Z axis, and thus, a turning process is carried out on a workpiece which is attached to a workpiece spindle.

## Claims

### Claim 1

A turning tool holder used for a combined lathe apparatus, comprising:
a mounting portion having an axis
a holder main body connected to the mounting portion; and
an attachment groove provided for attaching a turning tool having a turning tip to the holder main body, the attachment groove being formed at an outer surface of the holder main body so as to extend along a plane crossing the axis of the mounting portion, the attachment groove being defined by four surfaces, the four surfaces consisting of a first inner wall surface and a second inner wall surface that extend parallel to the plane, a third inner wall surface that extends perpendicularly to and connects the first and second inner wall surfaces, and a fourth inner wall surface that connects the first, second, and third inner wall surfaces at an inside of the holder main body, the attachment groove being opened at the outer surface of the holder main body in a direction opposite to the third inner wall surface and in a direction opposite to the fourth inner wall surface, and the first inner wall surface being located closest to the mounting portion and is referred to as a turning process tool attachment surface on which the turning tool is attached;
wherein the combined lathe apparatus comprising:
a workpiece spindle on which a workpiece is mounted, the workpiece spindle having a first axis; and
a tool spindle to which the mounting portion of a turning process tool is coaxially and removably attached for carrying out a turning process on the workpiece, wherein the turning process tool is made up of the turning tool and the turning tool holder;
an automatic tool replacing device to take out a specific turning process tool from among a plurality of the turning process tools and to replace the turning process tool attached to the tool spindle with the specific turning process tool;
a tool headstock which is movable along a second axis which is perpendicular to the first axis of the workpiece spindle and forms a predetermined angle with a horizontal plane, wherein the predetermined angle is greater than zero degrees and less than or equal to ninety degrees, wherein the tool spindle forms a portion of the tool headstock; and
a movable body which supports the tool headstock;
wherein the movable body is movable in a direction including a third axis component which is perpendicular to the first axis and the second axis;
wherein the tool spindle is controlled to be rotated or held without being rotated;
wherein a cutting point of the specific turning process tool attached to the tool spindle is moved along a horizontal line which is perpendicular to the first axis by moving the movable body in the direction including the third axis component; and
wherein the axis of the mounting portion is allocable to extend parallel to the second axis while the mounting portion is attached to the tool spindle, and when the axis of the mounting portion is located parallel to the second axis, the tool attachment surface is positioned to extend parallel to the horizontal plane.

### Claim 2 (depends on 1)

The turning tool holder according to claim 1, wherein the first predetermined angle is in the range of 0<θ≦90°.

### Claim 3 (depends on 2)

The turning tool holder according to claim 2, wherein the predetermined angle is one of 45° and 60°.

### Claim 4

A turning tool holder used for a combined lathe apparatus, comprising:
a mounting portion having an axis;
a holder main body connected to the mounting portion; and
an attachment groove provided for attaching a turning tool having a turning tip to the holder main body, the attachment groove being formed at an outer surface of the holder main body so as to extend along a plane crossing the axis of the mounting portion, the attachment groove being defined by four surfaces, the four surfaces consisting of a first inner wall surface and a second inner wall surface that extend parallel to the plane, a third inner wall surface that extends perpendicularly to and connects the first and second inner wall surfaces, and a fourth inner wall surface that connects the first, second, and third inner wall surfaces at an inside of the holder main body, the attachment groove being opened at the outer surface of the holder main body in a direction opposite to the third inner wall surface and in a direction opposite to the fourth inner wall surface, and the first inner wall surface being located closest to the mounting portion and is referred to as a turning process tool attachment surface on which the turning tool is attached;
wherein the combined lathe apparatus comprises:
a workpiece spindle on which a workpiece is mounted, the workpiece spindle having a first axis;
a tool spindle to which the mounting portion of a turning process tool is coaxially and removably attached for carrying out a turning process on the workpiece, wherein the turning process tool is made up of the turning tool and the turning tool holder;
an automatic tool replacing device to take out a specific turning process tool from among a plurality of the turning process tools and to replace the turning process tool attached to the tool spindle with the specific turning process tool;
a tool headstock which is movable along a second axis which is perpendicular to the first axis of the workpiece spindle and forms a predetermined angle with a horizontal plane, wherein the predetermined angle is greater than zero degrees and less than or equal to ninety degrees, wherein the tool spindle forms a portion of the tool headstock; and
a movable body which supports the tool headstock;
wherein the movable body is movable in a direction including a third axis component which is perpendicular to the first axis and the second axis;
wherein the tool spindle is controlled to be rotated or held without being rotated;
wherein a cutting point of the specific turning process tool attached to the tool spindle is moved along a horizontal line which is perpendicular to the first axis by moving the movable body in the direction including the third axis component and by moving the tool headstock along the second axis; and
wherein the axis of the mounting portion is allocable to extend parallel to the second axis while the mounting portion is attached to the tool spindle, and when the axis of the mounting portion is located parallel to the second axis, the tool attachment surface is positioned to extend parallel to the horizontal plane.

### Claim 5 (depends on 4)

The turning tool holder according to claim 4, wherein the predetermined angle is in the range of 0<θ≦90°.

### Claim 6 (depends on 5)

The turning tool holder according to claim 5, wherein the predetermined angle is one of 45° and 60°.