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WO2006008268A1 - Rivet aveugle - Google Patents

Rivet aveugle Download PDF

Info

Publication number
WO2006008268A1
WO2006008268A1 PCT/EP2005/053391 EP2005053391W WO2006008268A1 WO 2006008268 A1 WO2006008268 A1 WO 2006008268A1 EP 2005053391 W EP2005053391 W EP 2005053391W WO 2006008268 A1 WO2006008268 A1 WO 2006008268A1
Authority
WO
WIPO (PCT)
Prior art keywords
mandrel
rivet
head
stem
grooves
Prior art date
Application number
PCT/EP2005/053391
Other languages
English (en)
Inventor
David John Spiers
John David Davies
Original Assignee
Newfrey Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newfrey Llc filed Critical Newfrey Llc
Publication of WO2006008268A1 publication Critical patent/WO2006008268A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F16B19/1054—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like being frangible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/58—Making machine elements rivets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/58—Making machine elements rivets
    • B21K1/60—Making machine elements rivets hollow or semi-hollow rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F16B19/1072—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like comprising a thread and being rotated with respect to the rivet, thereby mechanically expanding and fastening the rivet

Definitions

  • This invention relates to blind rivets and is particularly concerned with improving the head retention and setting characteristics of a blind rivet.
  • Blind rivets are used for a variety of applications from the securing of thin sheets to the securing of relatively thick components to a variety of types and thickness of sheet materials. It is recognised that the blind rivet makes a considerable contribution to the strength and integrity of the resulting joint or fixing.
  • the rivet is required to claim the sheets together.
  • the rivet is expected to fill any clearance between the rivet body and the hole in the application, which will prevent the workpiece sheets from fretting under applied vibration, or oscillating applied loads.
  • rivets should have a roll-type bulged setting on the blind side of the workpiece giving increased tensile resistance.
  • the mandrel should also be break flush with the surface of the rivet flange on setting thus contributing to an increase in the shear resistance of the joint.
  • the mandrel head should be fixed to the tail-end of the rivet body on assembly and remain during and after setting. Cu ⁇ ently it is not possible to identify any prior known rivets that will give high joint integrity as well as providing a relatively wide grip capability especially with the more intractable rivet body materials such as steel.
  • the inward displacement of rivet body material is dependent upon workpiece hole size. If the hole is large or oversize compared with the diameter of the rivet body there is insufficient resistance to prevent the rivet body from expanding outwardly thus giving, at best, inadequate inwards material displacement of the rivet body material into the grooves of the mandrel resulting in increased broaching and debris in the grooves.
  • a further prior known method of retaining the mandrel within the tail of the rivet body is shown in the now familiar "F" Series rivet manufactured and sold by Emhart Teknologies GmbH and described in European Patent 1,106,845.
  • This patent shows a single but four-facetted recess beneath the mandrel head that has tapering sides inclined away from the head of the mandrel. It is into this recess that the rivet body tail end is formed in such a way that the tail end of the rivet body fills the recess and results in a thickened wall section.
  • the combination of the thickened wall and the work hardening of the rivet material at the tail end is designed to retain the mandrel in place during setting.
  • An object of the present invention to provide a rivet that incorporates a means for improving the retention of the mandrel head in the tail end of a high strength rivet, body.
  • a further object of the present invention to provide a rivet that incorporates means for improving the retention of the mandrel head in the tail-end of a high strength rivet body over a wide grip range.
  • a further object is to provide a rivet with a substantially constant reduction in length during setting thus providing a flush break mandrel capability with high shear strength of the set rivet.
  • a rivet having a unique form of grooves and ribs beneath the mandrel head.
  • these ribs are so designed to be of different heights. Since the external diameter of the rivet body is constant, it follows that the wall section at the tail of the rivet body will be progressively thicker along the body length towards its tail-end. Since this thickness is achieved during mandrel assembly, a beneficial increased hardness and, thus, increased resistance to compressive loading at the tail-end of he rivet body is achieved.
  • the unique shape of the ribs is achieved by rotary swaging, pressure forming, forging or rolling the grooves in accordance with the method claimed in the attached claims, and the unique shape of the ribs is due to the fact that the flow of displaced material from the mandrel stem during forming is greater along the flanks of the ribs than at the centre of the rib. This forms the ridges on each rib.
  • the grooves are produced in blank mandrels by rotary swaging, pressure forming or rolling the stem of the mandrel This is particularly important when rivet body materials are from more the intractable materials such as steel because in order to set such rivets, the setting loads are high. These loads, however, must be supported by the end of the rivet and the resulting compressive stresses must be below the ultimate compressive stress of the rivet body material otherwise the rivet body material in engagement with the mandrel will rupture prematurely before the rivet is set correctly. This would lead to an undesirable situation where the mandrel would be loose and the formation of the blind-side roll- type setting incomplete. . This ensures that increased resistance to mandrel movement in the rivet body as the rivet is being set, particularly at the maximum setting load.
  • Figure 2 is an enlarged view of the grooves of the mandrel of the rivet of Figure 1;
  • Figure 3 shows the rivet of Figure 1 in three different set positions.
  • the rivet 10 comprises a hollow generally tubular body 11, a head 12 and a central mandrel 13 extending through the centre of the body 11.
  • the mandrel 13 has a head 14 at one end that abuts the tail end 15 of the rivet 10 and extends beyond the head 12 of the rivet 10 so as to be capable of being gripped in the jaws of a riveting tool (not shown).
  • the groove 17 is provided with a plurality of concentric grooves 18 to 20 spaced along its length.
  • the grooves 18, 19, 20 define ribs 21, 22, 23 between the respective grooves 18, 19, 20 that have a special profile that is shown in greater detail in Figure 2.
  • each of the ribs 21, 22, and 23 have a concave shaped circumferential surface 24 subtended between two axially spaced ridges 25, 26.
  • the outside diameter of the ridges 25, 26 decrease slightly due to the taper of the stem 16 but the diameter of the valleys of the grooves 18, 19, 20 are the same.
  • the ribs 21 to 23 are of differing heights tapering from full height at rib 21 to the lower height at rib 23 with an intermediate height at rib 22.
  • the ribs 21 to 23 are formed as a result of rotary swaging, pressure forming, forging or rolling a mandrel blank in order to form the taper region 17 and the grooves
  • the unique shape of the ribs 121 to 23 is due to the fact that the flow of displaced material from the mandrel stem 16 during forming, is greater along the flanks of each of the ribs 12 to 23 than at the centre of each of the ribs 21 to 23. This forms the ridges 25, 26 whilst leaving the concave depression 24 on the outer diameter of each rib 21 to 23.
  • the mandrel 13 is inserted into the bore of a hollow rivet body 11 with the head 14 of the mandrel at the tail end of the body 11 and the rivet body 11 is swaged down onto the mandrel 13 to a uniform outer diameter.
  • This causes the rivet body 11 to have a greater wall thickness at the tail end 15 than the rest of the body 11 and therefore gives a greater resistance to compression loading when the mandrel 13 is pulled towards the head 12 of the rivet 10 during setting of the rivet 10.
  • the cold work done to achieve the thickened end will give a greater material hardness at that end thus further increasing resistance to compression loads. It can be seen that unlike conventionally grooved mandrels, the crests of the ribs 21 to 23 result in greater area of contact with the rivet body 11 and, therefore, gives a greater setting load carrying capability.
  • the setting load is applied via the mandrel head 14, the grooves 18 to 20 and the ribs 21 to 23 on the mandrel stem 16.
  • Figure 3 shows the rivet 10 set in maximum, minimum and intermediate grip thickness positions. In the maximum grip position, the rivet body 11 bulges in the region 17 of the grooved part of the mandrel 13.
  • the rivet body 11 On commencement of setting, the rivet body 11 will shorten in length to give good hole filling followed by the characteristic collapse to give a blind-side bulge. Since the end of the rivet body 11 is thicker in section than the rest of the body 11, the bulging or collapse of the rivet body 11 occurs nearer to the tail end 15 of the body 11 than other types of prior known rivets. Thus an increase of grip thickness can be obtained. It is also a benefit to have the mandrel head 14 and stem 16 retained after setting 11 by ensuring that the groove 21 nearest to the distal end of the rivet body 11 has rivet body material retained in that groove 21.
  • the intermediate and minimum grip thickness settings (shown dotted) show the mandrel head 14 and stem 16 remaining substantially in place after setting of the rivet by virtue of the rivet body 11 being substantially held in place in the grooves 21 to 23 adjacent the mandrel head 14.
  • the mandrel 13 is provided with a recess 27 at a location along the length of the stem 15 corresponding to a position adjacent to where the head 12 of the rivet 10 would be after setting the rivet.
  • the groove 27 provides a line of weakness that causes the mandrel stem 16 to snap off flush with the rivet head 12 when the rivet is set.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

L'invention concerne un rivet aveugle (10) comprenant un corps de rivet creux allongé (11) possédant une extrémité tête (12) et une extrémité queue (15) ainsi qu'un mandrin allongé (13) possédant une extrémité tête (14) située au voisinage de l'extrémité queue (15) du corps creux (11). Le mandrin (13) comporte une tige (16) s'étendant à travers le corps creux (11), cette tige (16) comportant une partie effilée (17) adjacente à la tête (14) du mandrin (13) qui s'effile vers la tête (14). La tige (16) comporte une extrémité distale faisant saillie au-delà de l'extrémité tête (12) du corps (11). La partie effilée (17) de la tige (16) est pourvue d'une pluralité de rainures (18 à 20) axialement espacées définissant entre elles des nervures (21 à 23) présentant un profil comprenant deux arêtes (25, 26) axialement espacées sous-tendant une surface circonférentielle concave (24) formée entre ces arêtes (25, 26). Le corps (11) présente un diamètre extérieur sensiblement uniforme et une épaisseur de paroi plus grande au niveau de la zone (17) correspondant à la partie effilée (17) du mandrin (13).
PCT/EP2005/053391 2004-07-16 2005-07-14 Rivet aveugle WO2006008268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0415961A GB2416575B (en) 2004-07-16 2004-07-16 A blind rivet
GB0415961.2 2004-07-16

Publications (1)

Publication Number Publication Date
WO2006008268A1 true WO2006008268A1 (fr) 2006-01-26

Family

ID=32893701

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/053391 WO2006008268A1 (fr) 2004-07-16 2005-07-14 Rivet aveugle

Country Status (2)

Country Link
GB (1) GB2416575B (fr)
WO (1) WO2006008268A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102933860A (zh) * 2010-06-08 2013-02-13 纽弗雷公司 抽芯铆钉及使用抽芯铆钉的紧固配置
CN109185303A (zh) * 2018-11-16 2019-01-11 常州华森医疗器械有限公司 一种可吸收拉铆钉

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103511419B (zh) * 2012-06-29 2017-04-05 富昱能源科技(昆山)有限公司 锁固装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366965A (en) * 1939-08-18 1945-01-09 Aviat Developments Ltd Tubular rivet
US3230818A (en) * 1963-05-31 1966-01-25 Olympic Screw & Rivet Corp Pull-type blind rivet
US3702088A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank blind bolt
US4405273A (en) * 1977-07-19 1983-09-20 Huck Manufacturing Company Blind fasteners

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1241123A (fr) * 1958-01-25 1960-09-16 Rivets tubulaires borgnes par noyaux obturateurs
NL263811A (fr) * 1960-09-19
GB1029654A (en) * 1961-06-19 1966-05-18 Avdel Ltd Improvements in or relating to fasteners for use in, and to methods of, blind riveting of apertured members
DE29716899U1 (de) * 1997-09-22 1997-11-27 Avdel Verbindungselemente GmbH, 30851 Langenhagen Dornbruchblindniet und Vorrichtung zu seiner Verarbeitung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366965A (en) * 1939-08-18 1945-01-09 Aviat Developments Ltd Tubular rivet
US3230818A (en) * 1963-05-31 1966-01-25 Olympic Screw & Rivet Corp Pull-type blind rivet
US3702088A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank blind bolt
US4405273A (en) * 1977-07-19 1983-09-20 Huck Manufacturing Company Blind fasteners

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102933860A (zh) * 2010-06-08 2013-02-13 纽弗雷公司 抽芯铆钉及使用抽芯铆钉的紧固配置
US9334893B2 (en) 2010-06-08 2016-05-10 Newfrey Llc Blind rivet and fastening arrangement with a blind rivet
CN109185303A (zh) * 2018-11-16 2019-01-11 常州华森医疗器械有限公司 一种可吸收拉铆钉

Also Published As

Publication number Publication date
GB2416575B (en) 2007-05-23
GB2416575A (en) 2006-02-01
GB0415961D0 (en) 2004-08-18

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