IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0601432
(2008-05-21)
|
등록번호 |
US-8402803
(2013-03-26)
|
우선권정보 |
FR-07 55255 (2007-05-25) |
국제출원번호 |
PCT/EP2008/056290
(2008-05-21)
|
§371/§102 date |
20100504
(20100504)
|
국제공개번호 |
WO2008/145591
(2008-12-04)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
The subject of the invention is a device and a process for producing single-piece parts, including a bulk section and an elongated section, the device includes a die, formed from at least two half-shells, provided with an orifice for introducing material and bearing as a hollow the shape of the bulk
The subject of the invention is a device and a process for producing single-piece parts, including a bulk section and an elongated section, the device includes a die, formed from at least two half-shells, provided with an orifice for introducing material and bearing as a hollow the shape of the bulk section of the part, at least one of the two half-shells includes an extrusion orifice for producing the elongated section of the part. The process includes a step of pushing a slug of material into a die, provided with an inlet orifice and bearing as a hollow, the shape of the bulk section of the part, and a step of extruding a fraction of the slug to produce the elongated section of the part through an extrusion orifice of the die so as to form a blank of the part via a stamping-extrusion operation.
대표청구항
▼
1. A method for producing a part made of a single material, the part comprising a bulky portion and an elongated portion, the method comprising the steps of: placing a billet of the material into a container;pushing the billet of the material from the container into a mold, the mold being provided w
1. A method for producing a part made of a single material, the part comprising a bulky portion and an elongated portion, the method comprising the steps of: placing a billet of the material into a container;pushing the billet of the material from the container into a mold, the mold being provided with a supply aperture in communication with the container and having a cavity of a volume corresponding to the bulky portion of the part;extruding a fraction of the billet in order to produce the elongated portion of the part through an extrusion aperture of the mold; andopening the mold to extract the bulky portion of the part. 2. The method as claimed in claim 1, further comprising, before the step of pushing the billet, the steps of: placing the billet in a container for supplying the mold, said container being connected to the supply aperture leading into the mold and the container; andheating the billet and mold assembly to a temperature close to the optimal temperature for plastic deformation of the material of the billet. 3. The method as claimed in claim 1, wherein, during the step of pushing the billet, the material is compressed and is pushed toward the supply aperture at a first pressure, so that the material deforms and fills the cavity of the mold, then the material is compressed at a second pressure higher than the first pressure so that a portion of the material comes out via the extrusion aperture made in the mold. 4. The method as claimed in claim 3, wherein the first pressure is a pressure of the order of 2000 to 3000 bar. 5. The method as claimed in claim 3, wherein the second pressure is a pressure of the order of 6000 to 7000 bar. 6. The method as claimed in claim 1, wherein, the mold comprising half-shells, the method comprises the step of pressing the half-shells one against the other in order to close the mold before the stamping-extrusion operation. 7. The method as claimed in claim 1, wherein, the mold comprising half-shells, the method comprises the step of applying a third pressure to the half-shells during the stamping-extrusion operation so as to keep the mold closed. 8. The method as claimed in claim 1, comprising the step of carrying out an extrusion operation by means of a curved die which produces an operation for bending the elongated portion of the part at the same time as the extrusion operation. 9. The method as claimed in claim 1, wherein the step of pushing the billet and the step of extruding are done together with a control of the temperature, pressure and flow speed of the material in the cavity. 10. A method for forming a metal part having a bulky portion and an elongated portion comprising the steps of: closing an empty two part mold having a cavity in communication with a container at a supply aperture leading into said cavity of the mold, said mold comprising an extrusion aperture on another side of said cavity;placing a billet formed of a metal in said container having an internal volume of sufficient volume to produce the whole metal part;pushing said metal from said container into said mold and filling said mold to create said bulky portion; andcontinuing to push the material until it causes a portion designed to produce said elongated portion to come out of the extrusion aperture. 11. A method for forming a metal part having a bulky portion and an elongated portion as claimed in claim 10 further comprising the step of stopping a pushing piston at the communication interface between the container and the mold to limit the travel of the piston and avoid deforming the part located within the mold. 12. A method for forming a metal part having a bulky portion and an elongated portion as claimed in claim 10 further comprising the step of releasing a pressure within the mold and opening the mold to extract said metal part. 13. A method for forming a metal part having a bulky portion and an elongated portion as claimed in claim 10 comprising the steps of: compressing the metal during the step of pushing;pushing the metal toward the supply aperture at a first pressure, so that the metal deforms and fills the mold; andcompressing the metal at a second pressure higher than the first pressure, so that a portion of the metal comes out via said extrusion aperture. 14. A method for forming a metal part having a bulky portion and an elongated portion as claimed in claim 10 comprising the step of compacting the metal in deforming the metal by causing a squeezing and an orientation of the metal crystals by the action of a work of deformation in one or more preferred directions. 15. A method for forming a metal part having a bulky portion and an elongated portion as claimed in claim 10 comprising the step of regulating at least one of temperature, flow speed and pressure in the mold and container.
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