[특허]Cryofluid assisted forming method

Air Products and Chemicals, Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Cryofluid assisted forming method

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B21D-037/16 B21D-037/00
미국특허분류(USC)	072/342.3; 072/069; 072/128; 072/201
출원번호	US-0250346 (2005-10-14)
등록번호	US-7434439 (2008-10-14)
발명자 / 주소	Zurecki,Zbigniew
출원인 / 주소	Air Products and Chemicals, Inc.
대리인 / 주소	Kiernan,Ann B.
인용정보	피인용 횟수 : 2 인용 특허 : 62

초록

Method of forming a workpiece comprising (a) providing a tool and a workpiece, wherein the workpiece has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming; and (c) providing a jet of cryogenic fluid and impinging essentially all of the jet of cryogenic fluid on a surface of the tool.

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The invention claimed is: 1. A method of forming a workpiece comprising (a) providing a tool for metal forming and a workpiece, wherein the workpiece comprises metal and has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming wherein the workpiece softens under said force; and (c) providing a jet of cryogenic fluid and impinging essentially all of the jet of cryogenic fluid on an external surface of the tool, wherein essentially no cooling of the workpiece is effected by impingement of said jet of cryogenic fluid, and the geometric average temperature of the tool is less than the geometric average temperature of the workpiece; and the tool is cooled such that it retains hardness and strength; and further wherein said method of forming is selected from the group consisting of contour and profile roll forming, power spinning, roll forging, orbital forging, shoe-type pinch rolling, alligator shearing, guillotine shearing, punch parting, rotary shearing, line shearing, slitting, wire and rod drawing, tube drawing, moving mandrel drawing, punch drawing, moving insert straightening, die and punch press bending, hammer forming, and die forging. 2. The method of claim 1 wherein the workpiece is plastically deformed by the tool. 3. The method of claim 1 wherein the workpiece is separated into two or more pieces by the tool. 4. The method of claim 1 further comprising applying a lubricant to any area on a surface of the tool and/or to any area on a surface of the workpiece. 5. The method of claim 4 wherein the lubricant comprises a powder entrained in the jet of cryogenic fluid. 6. The method of claim 4 wherein the lubricant is a liquid sprayed onto the tool and/or workpiece in combination with impinging essentially all of the jet of cryogenic fluid on a surface of the tool. 7. The method of claim 6 wherein the tool comprises a surface energy less than about 38 milliNewtons per meter (38 mN/m) and/or the workpiece comprises a surface energy less than about 38 milliNewtons per meter (38 mN/in). 8. The method of claim 6 wherein the amount of lubricant applied to the tool and/or the workpiece is less than about 100 milligrams per square foot. 9. The method of claim 4 wherein the lubricant is solid or semi-solid and the lubricant is applied by pressing or smearing onto the tool and/or workpiece. 10. The method of claim 1 wherein the cryogenic fluid is selected from the group consisting of nitrogen, argon, carbon dioxide, and mixtures thereof. 11. A method of forming a workpiece comprising (a) providing a tool for metal forming and a workpiece comprising metal, wherein the workpiece has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming wherein the workpiece softens under said force; and (c) providing a jet of cryogenic fluid and impinging at least a portion of the jet of cryogenic fluid on an external surface of the tool while impinging essentially none of the jet of cryogenic fluid on the workpiece; wherein essentially no cooling of the workpiece is effected by impingement of said jet of cryogenic fluid, and the geometric average temperature of the tool is less than the geometric average temperature of the workpiece; and the tool is cooled such that it retains hardness and strength; and further wherein said method of forming is selected from the group consisting of contour and profile roll forming, power spinning, roll forging, orbital forging, shoe-type pinch rolling, alligator shearing, guillotine shearing, punch parting, rotary shearing, line shearing, slitting, wire and rod drawing, tube drawing, moving mandrel drawing, punch drawing, moving insert straightening, die and punch press bending, hammer forming, and die forging. 12. The method of claim 11 further comprising (d) terminating contact of the tool and workpiece. 13. A shaped article made by a method comprising (a) providing a tool for metal forming and a workpiece comprising metal, wherein the workpiece has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming wherein the workpiece softens under said force; (c) providing a jet of cryogenic fluid and impinging essentially all of the jet of cryogenic fluid on an external surface of the tool wherein said tool retains its hardness and strength, and wherein essentially no cooling of the workpiece is effected by impingement of said jet of cryogenic fluid, and the geometric average temperature of the tool is less than the geometric average temperature of the workpiece; and (d) forming the workpiece into a final shape to provide the shaped article, wherein said method of forming is selected from the group consisting of contour and profile roll forming, power spinning, roll forging, orbital forging, shoe-type pinch rolling, alligator shearing, guillotine shearing, punch parting, rotary shearing, line shearing, slitting, wire and rod drawing, tube drawing, moving mandrel drawing, punch drawing, moving insert straightening, die and punch press bending, hammer forming, and die forging. 14. A shaped article made by a method comprising (a) providing a tool for metal forming and a workpiece comprising metal, wherein the workpiece has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming wherein the workpiece softens under said force; (c) providing a jet of cryogenic fluid and impinging at least a portion of the jet of a jet of cryogenic fluid on an external surface of the tool while impinging essentially none of the jet of cryogenic fluid on the workpiece, wherein said tool retains its hardness and strength, and the geometric average temperature of the tool is less than the geometric average temperature of the workpiece; and (d) forming the workpiece into a final shape to provide the shaped article, wherein said method of forming is selected from the group consisting of contour and profile roll forming, power spinning, roll forging, orbital forging, shoe-type pinch rolling, alligator shearing, guillotine shearing, punch parting, rotary shearing, line shearing, slitting, wire and rod drawing, tube drawing, moving mandrel drawing, punch drawing, moving insert straightening, die and punch press bending, hammer forming, and die forging. 15. An apparatus for processing a workpiece comprising (a) a tool for metal forming and a workpiece comprising metal, wherein the workpiece comprises metal and has an initial shape; (b) means for placing the workpiece and the tool in contact to form an interface, means for applying force to the tool and/or the workpiece, and means for moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece wherein the work material softens under said force; and (c) a cryogenic fluid application system adapted for providing a jet of cryogenic fluid and impinging essentially all of the jet of cryogenic fluid on an external surface of the tool, wherein essentially no cooling of the workpiece is effected by impingement of said jet of cryogenic fluid, and the geometric average temperature of the tool is less than the geometric average temperature of the workpiece; and the tool is cooled such that it retains hardness and strength; said apparatus selected from the group consisting of contour and profile roll forming systems, power spinning systems, roll forging systems, orbital forging systems, shoe-type pinch rolling systems, alligator shearing systems, guillotine shearing systems, punch parting systems, rotary shearing systems, line shearing systems, slitting systems, wire and rod drawing systems, tube drawing systems, moving mandrel drawing systems, punch drawing systems, moving insert straightening systems, die and punch press bending systems, hammer forming systems, and die forging systems.

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Cryofluid assisted forming method

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