Apparatus for and method of the plastic forming of materials
AssigneeInstitute po Metaloznanie i Technologia na Metalite
InventorsBoyan I. Paunov, Teodor A. Balevski, Bojidar S. Ivanov
Life of this patent
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Abstract
Method of plastically deforming a body of malleable solid material between male and female dies which are forcible pressed together. The material is subjected to repeated identical pressing cycles; in each pressing cycle the force between the dies is concentrated consecutively on separate sections of the surface of the material being deformed. The body may be directly or indirectly extruded into an elongated shape from a location between the male and female dies which is disposed nearest the section of the surface of the material being deformed in each pressing cycle, or it may be deformed between the dies without any appreciable portion thereof escaping from between the dies.
Claims9
In a method for the plastic forming of materials between the dies of a die assembly which has a place for the outflow of the product and which is compressed by the application of a pulsating compressive force applied to the material by a pulsating ram, said die assembly comprising a female die in which the worked material is disposed at the start of its deformation, and a composite male die which enters the female die along its longitudinal axis and compressively engages the material to be formed, the male die being made up of plurality of sections, each section being capable of axial movement in the female die independently of the movement of the other section, a first section of the male die being located nearest to the place of the outflow of the product, the improvement wherein the first section of the male die is rigidly connected to a reciprocating power driven plunger which positively drives the first section against the worked material, and the other sections of the male die are yieldably elastically thrust against the worked material so that during the periods of thrusting against the material in the die assembly by the ram the first section of the male die effects plastic forming of the material in the female die, thus shaping a portion of the product, the other sections of the male die at that time being motionless with respect to the material so that they are additionally elastically stressed, and in the periods wherein the ram reduces its thrust against the material in the die assembly the other sections of the male effect nonsimultaneously plastic forming of the material under the action of the additional stress to which they are elastically subjected in succession beginning with the section located nearest to the first section of the male die and finishing with the section of the male die which is most distant from the first section of the male die.
In an apparatus for the plastic forming of materials between dies of a die assembly which has a place for the outflow of the product and which is compressed by the application of a pulsating compressing force applied to the material by a pulsating ram, said die assembly comprising a female die in which the worked material is disposed at the start of deformation, and a composite male die which enters the female die along its longitudinal axis and compressively engages the materials to be formed, the male die being made up of a plurality of sections, each section being capable of axial movement in the female die independently of the movement of the other sections, a first section of the male die being located nearest to the place of the outflow of the product, the improvement which comprises a reciprocating power driven plunger, means rigidly connecting the first section of the male die to the driven plunger, means yieldably elastically thrusting the other sections of the male die against the worked material so that during the period of thrusting against the material in the die assembly by the ram the first section of the male die effects plastic forming of the material in the female die, thus shaping a portion of the product, means which at that time holds the other sections of the male die motionless with respect to the material so that they are being additionally elastically stressed, and means in the periods wherein the ram reduces its thrust against the material in the die assembly for non-simultaneously moving the other sections of the male die against the material in the female die thereby to form the material under the action of the additional stress to which such sections of the male die are elastically subjected in succession beginning with with a section located nearest to the first section of the male and finishing with the last section of the male die which is most distant from the first section of the male.
An apparatus for the plastic forming of materials, comprising a fixed housing body, a female die for containing the material to be worked, such material being in contact on one of its sides with a ram which enters one of the ends of the female die and on the other of its ends with a male die which is builtup of several elements arranged movably one with respect to the other, said elements of the male die being in contact at one of their ends with the to-be-worked material, such elements being in contact at the other of their ends with respectively intermediate elements, one of the intermediate elements being supported on a disc which is rigidly attached to one side of the housing body, while the remaining intermediate elements are supported on respective cylindrical supports which pass movably through holes in the disc and are in contact with respective concentric supporting elements telescopically disposed one within the other, the outermost element being arranged movably and with a seal in a hole in the housing body, said hole being provided with a cover which hermetically covers the hole in the housing body, the space between the cover and the supporting elements being filled with a liquid and being connected via a conduit system including a pressure reducer to a reservoir containing an elastic fluid medium, said conduit system further including a check valve, and measuring instruments and devices for limiting the pressure of the elastic fluid medium in the reservoir.
Dependencies are inferred from the claim text.