US4949443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Numerically controlled lathe
Assignee: Toto Ltd
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Filing: 1989-06-26
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Granted: 1990-08-21
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Expires: 2009-06-26
Abstract
Abstract A numerically controlled lathe which is capable of effecting combined machining comprises a frame constituting the main body, a main spindle driven to rotate, a main spindle chuck provided on the main spindle to hold a workpiece, a multiple-tool head having a plurality of tools, a turret head and a rear machining head. The multiple-tool head has three servomotors to move it along three axes which are perpendicular to each other. The body of the multiple-tool head has an annular frame structure. At least two rows of rotary and non-rotary tools for machining the workpiece are disposed on the multiple-tool head body in a direction parallel with one of the directions of movement. A tool driving motor is provided on the multiple-tool head body to drive the rotary tools. The rotary tools include a polygon machining tool for machining a polygonal workpiece. The multiple-tool head, the turret head and the rear machining head effect machining simultaneously or successively.
Inventors
- 👤 Tatsuhiko Saruwatari
- 👤 Atsushi Otani
- 👤 Akira Kosho
- 👤 Satoru Togawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:21
CPC Classifications
B; B23; B23Q; B23Q39/00; B23Q39/02; B23Q39/021; B23Q39/025; B23Q39/027; B23B; B23B3/00; B23B3/16; B23B3/167; B23B3/168; B23Q2039/008; B23Q2220/00; B23Q2220/002; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5104; Y10T29/5109; Y10T29/5114; Y10T29/5124; Y10T29/5152; Y10T29/5154; Y10T29/5155; Y10T82/00; Y10T82/25; Y10T82/2502; Y10T82/2506; Y10T82/2531; Y10T82/2541; Y10T82/2543
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A numerically controlled lathe including a frame constituting the main body of the lathe, a main spindle driven to rotate, a main spindle chuck provided on said main spindle to hold and rotate a workpiece, a multiple-tool head having a plurality of tools, and a tool turret head, wherein the improvement comprises: a. said multiple-tool head having three servomotors to move it along three axes defining directions of movement which are perpendicular to each other; b. a multiple-tool head body of said multiple-tool head having an annular and rectangular frame structure; c. said multiple-tool head body having a space defined and enclosed by said annular and rectangular frame structure so as to extend through a part thereof for machining said workpiece within said space with said tools; d. said plurality of tools including at least two rows of rotary and non-rotary tools for machining said workpiece disposed on said multiple-tool head body and having tool axes extending in a direction parallel with one of said directions of movement; and e. a tool driving motor disposed on said multiple-tool head body to drive said rotary tools.
Claim 2
Dependent Claim
185 words
A numerically controlled lathe including a frame constituting the main body of the lathe, a main spindle driven to rotate, a main spindle chuck provided on said main spindle to hold and rotate a workpiece, a multiple-tool head having a plurality of tools, and a tool turret head, wherein the improvement comprises: a. said multiple-tool head having three servomotors to move it along three axes defining directions of movement which are perpendicular to each other; b. a multiple-tool head body of said multiple-tool head having an annular and rectangular frame structure; c. said multiple-tool head body having a space defined and enclosed by said annular and rectangular frame structure so as to extend through a part thereof for machining said workpiece within said space with said tools; d. said plurality of tools including at least two rows of rotary and non-rotary tools for machining said workpiece disposed on said multiple-tool head body and having tool axes extending in a direction parallel with one of said directions of movement; and e. a tool driving motor disposed on said multiple-tool head body to drive said rotary tools.
Claim 3
Dependent Claim
22 words
A numerically controlled lathe according to claim 1, wherein said rotary tools include a polygon machining tool for machining a polygonal workpiece.
Claim 4
Dependent Claim
35 words
A numerically controlled lathe according to either one of claims 1 or 2, wherein said non-rotary tools are provided on the reverse side of said multiple-tool head body to machine the rear of said workpiece.
Claim 5
Dependent Claim
121 words
A numerically controlled lathe according to claim 1 and further comprising: a. a Z-axis servomotor provided on said frame to move said turret head along the axis of said main spindle; b. an X-axis servomotor provided to move said turret head along a line perpendicular to said Z-axis; c. said turret head having a secondary-chuck for holding said workpiece and a plurality of tools for machining said workpiece; d. indexing means including driving means for indexing any of said tools or said secondary-chuck to a position where it is to be used; g. rotational driving means for rotating said secondary-chuck and said tools; and f. said secondary-chuck being capable of receiving said workpiece from said main spindle chuck and holding it.
Claim 6
Dependent Claim
55 words
A numerically controlled lathe according to claim 4, further comprising: a. said rotational driving means and said indexing means being driven by the same servomotor; and b. a clutch means for selectively switching the drive of said servomotor to said indexing means or said rotational driving means for rotating said rotary tools and said secondary-chuck.
Claim 7
Dependent Claim
73 words
A numerically controlled lathe according to either one of claims 4, or 5, further comprising: a. a rear machining head disposed on said frame so as to face said main spindle chuck across said turret head; b. said rear machining head having a plurality of rotary and non-rotary tools; and c. said rear machining head having indexing means for rotary indexing a necessary tool to a position where it is to be used.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |