Patent US3795161A successfully refreshed from Google Patents.
US3795161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool machine for machining crankshafts
Assignee: MAG IAS GmbH Eislingen
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Filing: 1973-02-21
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Granted: 1974-03-05
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Expires: 1993-02-21
Abstract
Abstract The present invention relates to a tool machine of a known type in which a crankshaft is machined by a rotary annular tool having internal cutting edges located on a circle through which the crankshaft extends. The ends of the crankshaft are held by chucks mounted on columns carried by the bed of the machine. A slide on this bed movable in a direction parallel to the crankshaft carries the tool holder which is movable on the slide to a cutting position in which said circle is located in a tangential relationship to the pin of the crankshaft being cut and to a loading and unloading position in which said circle is brought to co-axial relationship with the chucks. When the tool holder is in this position, it may be moved by the slide to a position close to one of the columns in which the tool surrounds a substantially cylindrical projection on the column carrying the chuck. In this position the tool and the tool holder are located laterally of the workpiece permitting the same to be easily released from the chucks and unloaded from the machine which may then be charged with the next crankshaft.
Inventors
- 👤 H Berbalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:40
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/06; B23C2210/00; B23C2210/50; B23C2210/503; B23C2220/00; B23C2220/68; Y; Y10; Y10T; Y10T82/00; Y10T82/19; Y10T82/25; Y10T82/2527
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
236 words
A machine tool for machining a crank shaft comprising a bed provided with a guideway, a pair of columns mounted thereon in spaced relationship, a pair of substantially cylindrical projections each being provided on one of said columns in spaced relationship to said guideway, chucks carried by said projections for chucking the ends of the crankshaft to be machined, the common axis of said projections and of said chucks extending parallel to said guideway, a slide on said guideway, a tool holder on said slide for holding an annular rotary tool thereon of the type having internal cutting edges located on a circle surrounding a clearance space large enough to accomodate the crankshaft or said projections, mounting means connected with said slide and with said tool holder for mounting the latter movably on said slide for movement into various positions including a first position providing for co-axial relationship of said circle and said projections, and a second position providing for a tangential relationship of said circle to the crankshaft portion being machined, a motor on said tool holder for imparting rotation to said tool about its axis, and means for effecting a relative rotary motion between said tool holder and the crankshaft, when said slide is in said second position, said slide and said columns being so shaped as to enable said slide to move to positions in which said tool surrounds one of said projections.
Claim 2
Dependent Claim
236 words
A machine tool for machining a crank shaft comprising a bed provided with a guideway, a pair of columns mounted thereon in spaced relationship, a pair of substantially cylindrical projections each being provided on one of said columns in spaced relationship to said guideway, chucks carried by said projections for chucking the ends of the crankshaft to be machined, the common axis of said projections and of said chucks extending parallel to said guideway, a slide on said guideway, a tool holder on said slide for holding an annular rotary tool thereon of the type having internal cutting edges located on a circle surrounding a clearance space large enough to accomodate the crankshaft or said projections, mounting means connected with said slide and with said tool holder for mounting the latter movably on said slide for movement into various positions including a first position providing for co-axial relationship of said circle and said projections, and a second position providing for a tangential relationship of said circle to the crankshaft portion being machined, a motor on said tool holder for imparting rotation to said tool about its axis, and means for effecting a relative rotary motion between said tool holder and the crankshaft, when said slide is in said second position, said slide and said columns being so shaped as to enable said slide to move to positions in which said tool surrounds one of said projections.
Claim 3
Dependent Claim
138 words
The machine tool claimed in claim 1 further comprising a second slide on said guideway, a second tool holder on said slide for holding a second annular rotary tool thereon of the type having internal cutting blades surrounding a circular clearance space large enough to accommodate said projections, mounting means connected with said slide and with said second tool holder for mounting the latter movably on said second slide for movement into various positions defined in claim 1, a motor on said second tool holder for imparting rotation to said second tool about its axis, and means for effecting a relative rotary motion between said tool and the crankshaft, said second slide and said columns being so shaped as to enable said slide to move into a position in which said second tool surrounds one of said projections.
Claim 4
Dependent Claim
28 words
A machine tool as claimed in claim 2 in which said bed, said columns and said projections on said columns constitute a C-shaped rigid frame surrounding saId slides.
Claim 5
Dependent Claim
149 words
A machine tool as claimed in claim 1 in which said slide is provided with a transverse guideway extending between said first mentioned guideway and said axis transversely thereto and in which said mounting means comprise a second slide movably guided on said second guideway and provided with a bearing having a bearing axis, an eccenter body rotatably journalled in said bearing and forming a second bearing having an axis parallel to but spaced from said bearing axis, said second bearing accommodating said annular rotary tool, actuating means for moving said second slide on said first mentioned slide, first driving means to impart rotation to said eccenter body, and second driving means including said motor for imparting rotation to said tool, said first driving means constituting said means for effecting a relative rotary motion between said tool holder and the crankshaft, when said slide is in said second position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |