IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0899595
(2010-10-07)
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등록번호 |
US-8366363
(2013-02-05)
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발명자
/ 주소 |
- Jones, Steven V.
- Davies, John
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
99 |
초록
▼
A blind rivet assembly is provided. In another aspect, a blind rivet has ends that are received within countersinks in one or more workpieces and a mandrel head is completely pulled through the rivet without being severed from a mandrel stem. A further aspect includes a mandrel with an outwardly tap
A blind rivet assembly is provided. In another aspect, a blind rivet has ends that are received within countersinks in one or more workpieces and a mandrel head is completely pulled through the rivet without being severed from a mandrel stem. A further aspect includes a mandrel with an outwardly tapering shoulder.
대표청구항
▼
1. A rivet assembly comprising: at least one workpiece having a first outer surface and an opposite second outer surface, a first countersink located in the first outer surface and a second countersink located in the second outer surface, and the countersinks being connected by a through-hole;a blin
1. A rivet assembly comprising: at least one workpiece having a first outer surface and an opposite second outer surface, a first countersink located in the first outer surface and a second countersink located in the second outer surface, and the countersinks being connected by a through-hole;a blind rivet comprising a body and a tool-side flange, the body including a smooth cylindrical outside surface from the flange to a blind end prior to rivet setting, and a surface of the flange tapering outwardly from the outside surface of the body; anda mandrel comprising an elongated stem and a head, the stem extending through the rivet prior to setting, the head being laterally larger than the stem prior to rivet setting, the stem of the mandrel being smooth between the rivet and a mandrel tip prior to setting, and an outwardly tapering shoulder located on the mandrel between the head and the stem prior to rivet setting;the head being completely pulled through the rivet during rivet setting without severing the mandrel;the mandrel head including a depression located below a nominal tail end prior to rivet setting, the depression allowing lateral compression of the head during the pulling through of the head during setting; andthe flange of the rivet being located substantially flush or below flush of the first outer surface and in the first countersink after rivet setting, a blind end of the rivet being expanded by the mandrel substantially flush or below flush of the second outer surface and into the second countersink after rivet setting, and a cylindrical center section of the rivet spacing apart the flange and the expanded blind end sections of the rivet after rivet setting;wherein the pulling through of the head and shoulder during setting causes the blind end of the rivet body to outwardly expand into the adjacent countersink and radially expand the rivet body to completely fill the through-hole. 2. The rivet assembly of claim 1, wherein the depression in the mandrel head has a concave shape prior to rivet setting. 3. The rivet assembly of claim 1, wherein a deepest point of the depression is at a center of the mandrel head. 4. The rivet assembly of claim 1, wherein a deepest point of the depression in the mandrel head is longitudinally in a section associated with the tapering shoulder of the mandrel. 5. The rivet assembly of claim 1, wherein the at least one workpiece includes a pair of electrical device components. 6. The rivet assembly of claim 1, wherein the at least one workpiece includes a computer housing, and the mandrel head includes a lip of axial thickness prior to rivet setting. 7. The rivet assembly of claim 1, wherein the shoulder of the mandrel includes two differently angled, substantially frusto-conical, tapered surfaces. 8. The rivet assembly of claim 1, wherein the shoulder of the mandrel has a curved, tapered shape when viewed from a side of the mandrel. 9. The rivet assembly of claim 1, wherein an outside diameter of the mandrel head is equal to or between 3.5 mm and 2.9 mm before rivet setting. 10. The rivet assembly of claim 1, wherein an axial thickness of the mandrel head, not including the shoulder, is equal to or less than 1.0 mm before rivet setting, and a nominal angle of the mandrel shoulder adjacent the head is equal to or between 110° and 90° as measured from one side to the other of the shoulder before rivet setting. 11. The rivet assembly of claim 1, further comprising a setting tool operably setting the blind rivet to the workpiece from a single side of the workpiece, the setting tool comprising at least one jaw operably pulling the mandrel stem and a nosepiece operably abutting against the tool-side flange, and a piston of the tool operably causing the mandrel to be pulled through the rivet, the mandrel being discarded after setting. 12. The rivet assembly of claim 1, wherein 1,500 newtons of force or less are used to pull the mandrel through the rivet during rivet setting. 13. A rivet assembly comprising: a blind rivet comprising an outwardly tapering tool end, an opposite blind end, and a rivet body between the ends, the tool end having a greater wall thickness as compared to a wall thickness of the adjacent rivet body, the rivet including a bore extending through the entire rivet; anda mandrel comprising a stem and a head, the stem being located in the bore of the rivet in an interference fit manner prior to rivet setting;the mandrel head comprising a cavity located below a nominal blind end thereof;the mandrel further comprising a shoulder which laterally enlarges from the stem to the mandrel head;the head of the mandrel being configured for completely pulling through the rivet during rivet setting without severing the mandrel, and the rivet being unsevered during rivet setting; andthe set rivet including a cylindrical center section located between the outwardly tapering tool end section and the outwardly enlarged blind end section of the rivet;wherein the shoulder of the mandrel further comprises a first surface located adjacent the stem and at least a second and distinct surface located between the first surface and a lip of the head, the surfaces of the shoulder being coaxially aligned and each being cross-sectionally circular prior to rivet setting; andwherein the first and second surfaces of the shoulder of the mandrel include two differently angled and substantially frusto-conical, tapered surfaces. 14. The rivet assembly of claim 13, wherein the second surface of the shoulder is closer to perpendicular to a central mandrel axis as compared to the first surface. 15. The rivet assembly of claim 13, wherein at least one of the surfaces of the shoulder of the mandrel has a frusto-conical, tapered shape. 16. The rivet assembly of claim 13, wherein at least one of the surfaces of the shoulder of the mandrel has a curved, tapered shape when viewed from a side of the mandrel. 17. The rivet assembly of claim 13, further comprising workpieces fastened together by the rivet, the workpieces including a countersink in a blind side thereof and a countersink in a tool side thereof, the ends of the rivet being located in the respective countersinks in a substantially flush or below flush condition after rivet setting. 18. The rivet assembly of claim 13, wherein the cavity in the mandrel head has a concave shape prior to rivet setting. 19. The rivet assembly of claim 13, wherein a deepest point of the cavity is at a center of the mandrel head and the cavity assists in collapsing of the mandrel head during rivet setting. 20. The rivet assembly of claim 13, wherein a deepest point of the cavity in the mandrel head is longitudinally in a section associated with the shoulder of the mandrel. 21. The rivet assembly of claim 13, wherein: an outside diameter of the mandrel head is equal to or between 3.5 mm and 2.9 mm before rivet setting; andan axial thickness of the mandrel head, not including the shoulder, is equal to or less than 1.0 mm before rivet setting, and a nominal angle of the mandrel shoulder adjacent the head is equal to or between 110° and 90° as measured from one side to the other of the shoulder before rivet setting. 22. A rivet assembly comprising: a blind rivet comprising an outwardly tapering tool end, an opposite blind end, and a rivet body between the ends, the tool end having a greater wall thickness as compared to a wall thickness of the adjacent rivet body; anda mandrel comprising a stem and a head, the mandrel further comprising a shoulder including at least one tapering surface which laterally enlarges from the stem to the mandrel head before rivet setting;the mandrel head including a surface depressed below a nominal tail end thereof, a deepest point of the depressed surface being at an end view center of the mandrel head and a deepest point of the depressed surface being longitudinally adjacent a section associated with the tapering shoulder of the mandrel in a side view before rivet setting;wherein an outside diameter of the mandrel head is equal to or between 3.5 mm and 2.9 mm before rivet setting;wherein a nominal angle of the mandrel shoulder adjacent the head is equal to or between 110° and 90° as measured from one side to the other of the shoulder before rivet setting;the head of the mandrel being configured for completely pulling through the rivet during rivet setting without severing the mandrel, and the depressed surface allowing deformation of the head of the mandrel during the head pulling through the blind rivet; and1,500 newtons of force or less are used to pull the mandrel through the rivet during rivet setting. 23. The rivet assembly of claim 22, further comprising workpieces fastened together by the rivet, the workpieces including a countersink in a blind side thereof and a countersink in a tool side thereof, the ends of the rivet being located in the respective countersinks in a substantially flush or below flush condition after rivet setting. 24. The rivet assembly of claim 23, wherein the at least one workpiece includes a pair of electrical device components. 25. The rivet assembly of claim 22, wherein at least one tapering surface of the mandrel shoulder further comprises a first surface located adjacent the stem and a second and distinct surface located between the first surface and a lip of the head, the surfaces of the shoulder being coaxially aligned and each being cross-sectionally circular prior to rivet setting.
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