Patent US4157055A successfully refreshed from Google Patents.
US4157055A
Expired / Lapsed
US
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Copying attachment for crankshaft milling machine
Assignee: GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
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Filing: 1978-10-02
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Granted: 1979-06-05
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Expires: 1998-10-02
Abstract
Abstract Known machines for milling a crankshaft comprise a longitudinal carriage movable in a first direction, a tool carriage movable on the longitudinal carriage for reciprocation relative thereto in a direction transverse to the first direction, a cutter head mounted on the tool carriage for rotation and having a cutting tool with inwardly directed cutting edge extending along a cutting circle and a chuck supporting a workpiece for rotation about the same axis as the cutter head and surrounded by the cutting circle. The invention provides a copying attachment comprising a template connected to the tool carriage for reciprocation therewith and having an arcuate edge portion, a roller mounted on the longitudinal carriage for rotation about an axis parallel to the axis about which the arcuate template edge portion is centered, a crank revolving the roller about a third axis parallel to, and spaced from, the said axes, and a hydraulic actuator connected to the tool carriage and including a head applying pressure to a side of the roller remote from the template edge portion, the actuator being operable to press the head into engagement with the remote roller side to force the roller towards the edge portion of the template.
Inventors
- 👤 Otto Marzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/06; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/341; B23C2210/00; B23C2210/50; B23C2210/503; B23C2220/00; B23C2220/68; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/302688; Y10T409/302744; Y10T409/306664; Y10T409/30756; Y10T82/00; Y10T82/19; Y10T82/25; Y10T82/2527
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
380 words
A copying attachment for a crankshaft milling machine which comprises a machine bed having a longitudinal axis, a longitudinal carriage mounted on the machine bed for movement along the longitudinal axis of the machine bed, the longitudinal carriage having transverse guide means extending transversely to the longitudinal axis, a tool carriage mounted on the longitudinal carriage for movement in unison therewith along the longitudinal axis of the machine bed and for reciprocation relative to the longitudinal carriage along the transverse guide means, a cutter head mounted on the tool carriage for movement in unison with the tool carriage along the transverse guide means and for rotation about an axis, the cutter head having a cutting tool with inwardly directed cutting edges extending along and defining a cutting circle upon rotation of the cutter head, the cutting edges being capable of machining a workpiece rotating about the axis of rotation of the cutter head and surrounded by the cutting edges of the cutting tool, the copying attachment comprising (a) a template connected to the tool carriage for reciprocation in unison therewith along the transverse guide means and having an edge portion along an arc of a circle having the same radius as the cutting circle and being centered about an axis, (b) a roller mounted on the longitudinal carriage for movement in unison therewith along the longitudinal axis and for rotation about an axis parallel to the axis about which the arc of a circle of the template edge portion is centered, (c) revolving means for revolving the roller about a third axis parallel to, and spaced from, the axes of the arc of a circle of the template edge portion and of the roller, and (d) a hydraulic actuator having one end connected to the tool carriage for movement in unison therewith along the longitudinal axis and extending in the direction of the transverse guide means, the actuator including a pressure-applying head connected to another end of the actuator remote from the one end, the pressure-applying head being arranged adjacent a side of the roller remote from the edge portion of the template and the actuator being operable to press the pressure-applying head into engagement with the remote side of the roller to force the roller towards the edge portion.
Claim 2
Dependent Claim
380 words
A copying attachment for a crankshaft milling machine which comprises a machine bed having a longitudinal axis, a longitudinal carriage mounted on the machine bed for movement along the longitudinal axis of the machine bed, the longitudinal carriage having transverse guide means extending transversely to the longitudinal axis, a tool carriage mounted on the longitudinal carriage for movement in unison therewith along the longitudinal axis of the machine bed and for reciprocation relative to the longitudinal carriage along the transverse guide means, a cutter head mounted on the tool carriage for movement in unison with the tool carriage along the transverse guide means and for rotation about an axis, the cutter head having a cutting tool with inwardly directed cutting edges extending along and defining a cutting circle upon rotation of the cutter head, the cutting edges being capable of machining a workpiece rotating about the axis of rotation of the cutter head and surrounded by the cutting edges of the cutting tool, the copying attachment comprising (a) a template connected to the tool carriage for reciprocation in unison therewith along the transverse guide means and having an edge portion along an arc of a circle having the same radius as the cutting circle and being centered about an axis, (b) a roller mounted on the longitudinal carriage for movement in unison therewith along the longitudinal axis and for rotation about an axis parallel to the axis about which the arc of a circle of the template edge portion is centered, (c) revolving means for revolving the roller about a third axis parallel to, and spaced from, the axes of the arc of a circle of the template edge portion and of the roller, and (d) a hydraulic actuator having one end connected to the tool carriage for movement in unison therewith along the longitudinal axis and extending in the direction of the transverse guide means, the actuator including a pressure-applying head connected to another end of the actuator remote from the one end, the pressure-applying head being arranged adjacent a side of the roller remote from the edge portion of the template and the actuator being operable to press the pressure-applying head into engagement with the remote side of the roller to force the roller towards the edge portion.
Claim 3
Dependent Claim
47 words
The copying attachment of claim 1, the axis of rotation of the cutter head being parallel the longitudinal axis of the machine bed, and the axis about which the arc of a circle of the template edge portion being centered is transverse to the transverse guide means.
Claim 4
Dependent Claim
23 words
The copying attachment of claim 1, the revolving means comprising a crank mounted in the longitudinal carriage for rotation about the third axis.
Claim 5
Dependent Claim
59 words
The copying attachment of claim 1, the pressure-applying head being offset from the edge portion of the template in the direction of the axis of rotation of the roller, and the roller comprising two coaxial sections, one of the roller sections being aligned with the pressure-applying head and the other roller section being aligned with the template edge portion.
Claim 6
Dependent Claim
28 words
The copying attachment of claim 1, a second hydraulic actuator connecting the tool carriage to the longitudinal carriage and extending in the direction of the transverse guide means.
Claim 7
Dependent Claim
47 words
The copying attachment of claim 1, a carriage for the template and screw means connecting the template carriage to the tool carriage whereby the template carriage is movable with the tool carriage in the direction of the transverse guide means, the screw means extending in said direction.
Claim 8
Dependent Claim
92 words
The copying attachment of claim 1, rail means affixed to the tool carriage and extending in the direction of the transverse guide means, the pressure-applying head comprising two parts, a first pressure-applying head part engaging the rail means and being guided thereby in a straight line into the engagement with the remote roller side to force the roller towards the template edge portion, and the second pressure-applying head part being pivoted to the first part about the axis about which the arc of the circle of the template edge portion is centered.
Claim 9
Dependent Claim
25 words
The copying attachment of claim 7, the hydraulic actuator comprising a piston rod affixed to the first pressure-applying head part and extending towards the template.
Claim 10
Dependent Claim
57 words
The copying attachment of claim 7, a carriage for the template and screw means connecting the template carriage to the tool carriage whereby the template carriage is movable with the tool carriage in the direction of the transverse guide means, the screw means extending in said direction and the rail means being secured to the template carriage.
Claim 11
Dependent Claim
40 words
The copying attachment of claim 1, an adjustably positionable stop in the path of the reciprocation of the tool carriage relative to the longitudinal carriage for limiting the reciprocation in a direction towards the longitudinal axis of the machine bed.
Claim 12
Dependent Claim
51 words
The copying attachment of claim 1, drive means for rotating the workpiece supporting means about the axis of rotation of the cutter head, drive means for rotating the revolving means about the third axis, and means for synchronizing the drive means for rotating the workpiece and the revolving means in synchronism.
References Cited (Backward Citations)
US3595131A
Cited
US3880025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |