Metal founding – Means to shape metallic material – Including ladle or crucible type melt receptacle
Patent
1980-02-22
1983-04-05
Godici, Nicholas P.
Metal founding
Means to shape metallic material
Including ladle or crucible type melt receptacle
164136, 414733, B22D 4112
Patent
active
043788360
DESCRIPTION:
BRIEF SUMMARY
SCOPE OF THE INVENTION
The invention relates to a transfer and manipulation device for foundry accessories, and more precisely for a light alloy casting ladle.
PRIOR ART
In the foundry field, and in particular the light alloy foundry field, it is known to use what are currently called robots for carrying out the operations involved in manipulating castings, mould parts, cores or molten metal, from a first charging zone to a second discharge zone. They are thus used for example in order to withdraw such metal from one or more fixed molten metal holding furnaces using a ladle, transferring the full ladle to directly above one or more other stations in which moulds are prepared, by means of a device which automatically moves the ladle between the furnaces and moulds, pouring the metal into these moulds and returning the ladle to directly above a furnace in order to recommence this operation. Secondary stations can be provided about such robots for carrying out maintenance on the ladle or the manipulated elements, and the device is either automatically or manually controlled in bringing the ladle level with these stations.
Known devices for carrying out the manipulation movements are of various types. They are mainly mechanisms comprising bridges on which are horizontally moved the vertical mobile devices carrying the ladle, or arms hinged to rotate horizontally about a column and comprising at their free end a support or gripping member which can be driven with a vertical movement relative to the arm or column, if necessary accompanied by a traverse movement along the arm.
DESCRIPTION OF THE INVENTION
The present invention relates to a robot for manipulating foundry castings or equipment, and in particular molten metal for making castings, of the type in which the transfer operation is carried out by a support or gripping member carried at the end of an arm which can rotate in a vertical plane about a horizontal pin, said pin being carried by a part of a frame which rotates horizontally.
More particularly, it firstly provides a method for operating the arm in which, separately and consecutively, the arm is first elevated by rotation in said vertical plane until the support or gripping member is disposed directly over the vertical shaft of rotation of the rotating part of the frame, this part is then rotated horizontally about said vertical shaft, and finally the arm is made to continue its rotation in the same direction of rotation about its hinge in order to cause it to lower.
The invention secondly provides a manipulation device constituted by a frame supporting an arm, at one end of which there is attached a gripping or support member for the elements to be manipulated. The frame comprises a fixed part and a mobile part, rotatable relative to said fixed part about a vertical shaft. Said member is hinged to said end of the arm. Finally, said arm is hinged in the vicinity of its other end to the top of said mobile part, about a horizontal pin. Means for driving the arm about its hinge are disposed between said arm and said rotatable part of the frame in such a manner that the arm can be rotated through about 180.degree., the support or gripping member being able during its movement to describe substantially a vertical semicircle about the horizontal plane passing through said hinging pin. Means are provided for keeping said support member in a fixed position, for example vertical, in particular in the case of a casting ladle, whatever the inclination of the arm.
In a preferred embodiment, the means for driving the arm about its hinge are constituted by a cylinder rigid with the rotating part of the frame, its rod comprising a rack cooperating with a pinion rigid with the arm. The mobile part of the frame is rotated relative to the fixed part by a drive member of the cylinder type rigid with the fixed part, the rod of which comprises a rack cooperating with a drive pinion for the mobile part. It is advantageous if said arm is prolonged beyond its hinge relative to the support member, and has hinged to
REFERENCES:
patent: Re28437 (1975-06-01), Devol et al.
patent: 3114463 (1963-12-01), Fouron
patent: 3543947 (1970-12-01), Devol
patent: 3845284 (1974-10-01), Taguchi et al.
Godici Nicholas P.
Lin K. Y.
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