Metal deforming – With means to handle work or product – Including means to permit maneuvering of work or product at...
Patent
1988-11-02
1990-10-09
Spruill, Robert L.
Metal deforming
With means to handle work or product
Including means to permit maneuvering of work or product at...
414738, 414621, B21D 4310, B21J 1310
Patent
active
049613367
DESCRIPTION:
BRIEF SUMMARY
This invention relates to manipulators for manipulating metal ingots, particularly during forging.
Such manipulators are well known and consist essentially of a peel assembly mounted on a wheeled carriage. In use, the ingot is gripped, in cantilever fashion, by the jaws of the peel assembly and the peel and ingot can be displaced by displacing the wheeled carriage, usually along a set of rails. In addition, movement of the ingot relative to the wheeled carriage in a number of different directions can be brought about by displacing the peel assembly relative to the carriage.
According to the present invention, a manipulator for a metal ingot comprises a peel assembly and a wheeled carriage; said peel assembly comprising an elongate shaft having at least two cooperating jaws at one end thereof, the shaft being mounted for rotation about its longitudinal axis in a housing structure; said structure being supported on the wheeled carriage adjacent one end thereof and the carriage having a rigid support means spaced from said end; and a plurality of elongate links pivotally secured at their ends to the support means and to the housing structure, respectively.
Conveniently, the housing structure is supported on the wheeled carriage by one or more piston-cylinder devices, with one part of the or each device engaging the housing and the other part of the or each device engaging the wheeled carriage such that the housing structure can be raised and lowered by operation of the or each piston-cylinder device.
In a preferred arrangement, there are two piston-cylinder devices, each having its cylinder connected to the housing and the outer end of its piston engaging the wheeled carriage; and the outer end of each piston is of part-spherical form and engages with a corresponding part-spherical surface on the carriage.
The part-spherical surfaces are conveniently mounted on a part of the carriage which is displaceable in the direction normal to the direction of movement of the carriage and, in this way, by displacing said part of the carriage, the housing is moved towards and away from the sides of the carriage in the direction normal to the direction of movement of the carriage thereby providing a degree of side shift for the peel assembly.
In a preferred arrangement, there are three links pivotally connected to the rigid support means and to the housing structure of the peel assembly. In a convenient arrangement, a pair of said links are positioned at the same level below the axis of the peel and symmetrical with the vertical axis containing the axis of the peel and the third link is located in the vertical plane containing the axis of the peel but above the longitudinal axis of the peel.
At least one of the two lower links is conveniently connected either directly or indirectly to a piston-cylinder device to enable the link to be moved in the direction of its length.
In order that the invention may be more readily understood, it will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 is a side elevation, with parts cut away, of a manipulator in accordance with one embodiment of the present invention;
FIG. 2 is a plan view, with part cut away, of the manupualtor shown in FIG. 1;
FIG. 3 is an end elevation, partly in section, on the line III--III of FIG. 1;
FIG. 4 is a sectional end elevation on the line IV--IV of FIG. 1;
FIG. 5 is a section on the line V--V of FIG. 2;
FIGS. 6 and 7 are side elevations showing various positions of the peel with respect to the carriage;
FIGS. 8 and 9 are plan views showing various positions of the peel with respect to the carriage; and
FIG. 10 is a perspective view of a manipulator according to an alternative embodiment of the invention.
Referrring to FIGS. 1 to 9, a manipulator for gripping and manipulating metal ingots comprises a peel assembly 1 mounted on a wheeled carriage 3. The wheeled carriage comprises a front structure mounted on two-wheel bogies 7 and a rear structure 9 mounted on single wheels 11. The front and rear structur
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patent: 2758734 (1956-08-01), Westling
patent: 3476276 (1969-11-01), Stubbs et al.
patent: 3498490 (1970-03-01), Schussler et al.
patent: 3631996 (1972-01-01), Bonesteel et al.
patent: 4815311 (1989-03-01), Schubert
Lister Paul E.
Wilson Geoffrey
Davy McKee (Sheffield) Limited
Spruill Robert L.
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