Method and apparatus for producing beneficial stresses around apertures, and improved fatigue life products made by the method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-028/26
B21D-031/00
출원번호
US-0668769
(2000-09-22)
발명자
/ 주소
Easterbrook, Eric T.
출원인 / 주소
Stresswave, Inc.
인용정보
피인용 횟수 :
9인용 특허 :
25
초록▼
Metal coldworking tooling and a method of employing such tooling. The tooling is used to produce deformation in a workpiece, preferably via use of stress waves, to provide a selected beneficial residual stress profile in the workpiece, in order to provide high fatigue life structures in a minimum nu
Metal coldworking tooling and a method of employing such tooling. The tooling is used to produce deformation in a workpiece, preferably via use of stress waves, to provide a selected beneficial residual stress profile in the workpiece, in order to provide high fatigue life structures in a minimum number of manufacturing steps. Preferably, action of an indenter causes propagation of stress waves to coldwork a workpiece, causing dimples in the workpiece. Preferably, the dimples are provided with a shape formed by application of a uniform pressure profile to the workpiece surface. By optimized use of the method, a relatively uniform beneficial residual stress profile is provided at both the surface and at the midplane apertures in a workpiece, so as to improve overall fatigue life. An improved indenter tool profile shape is described, having a smoothly curved indenter surface portion. Also, the use of a consumable lamina wafer technique provides the benefit of easy application of uniform stress profile to a workpiece.
대표청구항▼
Metal coldworking tooling and a method of employing such tooling. The tooling is used to produce deformation in a workpiece, preferably via use of stress waves, to provide a selected beneficial residual stress profile in the workpiece, in order to provide high fatigue life structures in a minimum nu
Metal coldworking tooling and a method of employing such tooling. The tooling is used to produce deformation in a workpiece, preferably via use of stress waves, to provide a selected beneficial residual stress profile in the workpiece, in order to provide high fatigue life structures in a minimum number of manufacturing steps. Preferably, action of an indenter causes propagation of stress waves to coldwork a workpiece, causing dimples in the workpiece. Preferably, the dimples are provided with a shape formed by application of a uniform pressure profile to the workpiece surface. By optimized use of the method, a relatively uniform beneficial residual stress profile is provided at both the surface and at the midplane apertures in a workpiece, so as to improve overall fatigue life. An improved indenter tool profile shape is described, having a smoothly curved indenter surface portion. Also, the use of a consumable lamina wafer technique provides the benefit of easy application of uniform stress profile to a workpiece. 3/001.B; US-4153253, 19790500, White, Sr., 273/128; US-4491320, 19850100, Smith, 473/446; US-4580431, 19860400, Oku et al., 072/334; US-5174567, 19921200, Nordstrom, 473/446; US-5284343, 19940200, Bigornia et al., 273/128; US-5518237, 19960500, Bellehumeur, 273/128; US-5597161, 19970100, Bellehumeur et al., 473/588; US-5672129, 19970900, Fisher et al., 473/471; US-5733213, 19980300, Colarusso, 473/588; US-5976042, 19991100, LaMarche et al., 473/588; US-6244089, 20010600, Schoenau et al., 072/108
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (25)
Champoux Louis A. (Seattle WA), Apparatus and method for prestressing a countersunk fastener hole.
Simonetto Charles M. (Le Perreux FRX), Method of deforming two opposite edges of a single workpiece by machining, and apparatus for implementing the method.
Burris Kenneth W. ; Clements Thomas E., Process for improving fatigue resistance of a component by tailoring compressive residual stress profile, and article.
El-Wardany, Tahany Ibrahim; Viens, Daniel V.; Grelotti, Robert A.; Sangiovanni, Joseph J.; Zimmerman, John F.; Zhang, Yan, Apparatus and method for on line surface enhancement of a workpiece.
Dantou, Nicolas; Bianco, Stephane; Godenzi, Christian, Method for assembling a part of a metal material and a part of a composite material using a fastener.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.