WO2020048553A1 - Rivet aveugle autoforeur - Google Patents

Rivet aveugle autoforeur Download PDF

Info

Publication number
WO2020048553A1
WO2020048553A1 PCT/CZ2019/000042 CZ2019000042W WO2020048553A1 WO 2020048553 A1 WO2020048553 A1 WO 2020048553A1 CZ 2019000042 W CZ2019000042 W CZ 2019000042W WO 2020048553 A1 WO2020048553 A1 WO 2020048553A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
stem
sleeve
self
blind rivet
Prior art date
Application number
PCT/CZ2019/000042
Other languages
English (en)
Inventor
Marian Gável
Original Assignee
Nex Rivet S.R.O.
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 Nex Rivet S.R.O. filed Critical Nex Rivet S.R.O.
Priority to DE212019000368.0U priority Critical patent/DE212019000368U1/de
Publication of WO2020048553A1 publication Critical patent/WO2020048553A1/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
    • F16B19/083—Self-drilling rivets
    • 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
    • B21J15/048—Setting self-drilling 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
    • 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

Definitions

  • the invention relates to a self-drilling blind rivet for the creation of a permanent joint.
  • the rivet itself has the shape of a round tube with a wide flange (head) at its end. In the direction from the tube end towards the flange, a round steel stem is driven. At its lower end, the stem has an upset head with the diameter greater than the inner diameter of the tube but equal to or greater than the outer diameter of the tube. At a distance corresponding to approximately one to two diameters of the stem, a sharp V- shaped groove is formed around the circumference of the stem.
  • the stem On its other side, the stem usually has the shape of a cone or a pyramid, similar to that of a nail.
  • the described set i.e. a rivet on a stem, is ready for use, to form a joint.
  • Joints are formed as follows: The materials to be joined are placed on one another and secured against displacement. A hole in which the blind rivet is to form the future joint is drilled or made otherwise. The free end of the blind rivet stem is clamped into riveting pliers resting on the rivet head, which pull the blind rivet stem inside the pliers, thus pushing the blind rivet stem head into the rivet tube and deforming it in both radial and axial directions; this forms the rivet joint closing head and as a result of increasing the tensile stress in the stem, the stem breaks at the recess point, allowing the stem to be removed from the completed rivet joint.
  • Blind rivets have diameters ranging from 2.4 to 7.8 mm and lengths between 5 and 50 mm. Aluminium, steel, A2 stainless steel, A4 stainless steel, brass and copper are used as rivet materials.
  • the above description demonstrates the disadvantage of the current solution, which requires two steps or two different successive operations in order to create the rivet joint, i.e. hole drilling and the subsequent creation of the rivet joint.
  • the objective of the presented invention is to avoid the drawbacks of the described blind rivet design.
  • the defined objective is achieved by the invention, i.e. the self-drilling blind rivet consisting of a hollow sleeve formed by a tube ended with a flange-shaped head and a tear element formed by a stem with a head, the principle of which is in the fact that the tear element head has the shape of a helical drilling bit with a stem attached to its rear head; the diameter of the cylindrical part of the stem corresponds to the diameter of the through-hole of the tubular part of the sleeve and the outer diameter of the tear element head is equal to or greater than the outer diameter of the tubular part of the sleeve.
  • the sleeve head has the shape of a lens or cone or hexagon, and the rear face of the head has a conical chamfer on the outer circumference.
  • cylindrical part of the stem is provided with a circumferential notch groove in its part inserted in the sleeve through hole.
  • Figure 1 is a self-drilling blind rivet, as an overall view and a half-section view; and Figures 2(a) - 2(d) show individual phases of the rivet joint formation.
  • the self-drilling blind rivet consists of a hollow sleeve N which is formed by a tubular part 6 terminated by a flange-shaped head 7 and a tear element S formed by a stem 1 with a head 2.
  • the head 2 of the tear element S is formed in the form of a helical drilling bit, with a stem 1 attached to its rear face 3.
  • the tear element S and the sleeve N are designed so that the diameter of the cylindrical part 4 of the stem 1 of the tear element S corresponds to the diameter of the hole 5 of the tubular part 6 of the sleeve N and the outer diameter of the head 2 of the tear element S is equal to or greater than the outer diameter of the tubular part 6 of the sleeve N.
  • the head 7 of the hollow sleeve N may have the shape of a lens (lens head), a cone (countersunk head) or a hexagon (hexagonal head).
  • the rear face 3 of the head 2 is provided with a conical chamfer 8 on the outer circumference, for an easier deformation of the tubular part 6 of the sleeve N when forming the closing collar 10 of the sleeve N during the creation of the rivet joint, as shown in figures 2(a) - 2(d).
  • the cylindrical part 4 of the stem 1 is provided with a circumferential notch groove 9 in the area with which it is inserted in the through hole 5 of the sleeve N designed to locate the point where the cylindrical part 4 of the stem 1 breaks at the end of the riveting process, after the creation of the closing ring TO of the sleeve N.
  • the free end of the cylindrical part 4 of the stem 1 is provided with an unmarked cone or pyramid-shaped end, for easier insertion into a riveting drill, similar to a nail, for example. Individual stages of the process of forming a rivet joint using a self-drilling blind rivet are shown in figures 2(a) - 2(d).
  • the first stage of forming a rivet joint using a self-drilling blind rivet is shown in fig. 2(a) where the cylindrical part 4 of the stem 1_ is clamped into the rotary riveting head JM of a drilling machine (not shown).
  • a sleeve N is placed on the cylindrical part 4 of the stem 1, the tubular part 6 of which comes in contact with the conical chamfer 8 of the rear face 3 of the head 2 of the stem 1
  • the riveting head H By turning the riveting head H, the stem 1 clamped in it rotates, and its head 2 forms a through hole at the location of the future joint.
  • the third stage according to fig. 2(c) starts with the rotary riveting head V ⁇ pushed in the axial direction to the connected component D, which leads to the stopping of the riveting head H and initiating tensile stress in the stem 1, after which the stem 1 is pulled inside the riveting head V ⁇ _ and the end of the tubular part 6 of the sleeve Nopens, while forming a closing collar 10 of the hollow sleeve N.
  • the last fourth stage according to fig.
  • the part breaks at the place of the notch groove 9 and subsequently the broken cylindrical part 4 of the stem 1 is removed from the through hole 5 of the sleeve N.
  • the head 2 of the stem 1 remains in the closing collar 10 of the sleeve N or falls off.
  • Self-drilling blind rivets are suitable for the creation of non-detachable rivet joints in a single operation, particularly when joining thin materials, such as thin metal sheets.

Landscapes

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

Abstract

L'invention concerne un rivet aveugle autoforeur constitué d'un manchon creux (N) qui est formé par une partie tubulaire (6) terminée par une tête en forme de bride (7) et un élément à casser (S) formé par une tige (1) avec une tête (2). Le principe de l'invention est que la tête (2) de l'élément à casser (S) présente la forme d'un foret hélicoïdal doté d'une tige (1) fixée à sa tête arrière (3) ; le diamètre de la partie cylindrique (4) de la tige (1) correspond au diamètre du trou traversant (5) de la partie tubulaire (6) du manchon (N) et le diamètre extérieur de la tête (2) de l'élément à casser (S) est égal ou supérieur au diamètre extérieur de la partie tubulaire (6) du manchon (N).
PCT/CZ2019/000042 2018-09-04 2019-09-03 Rivet aveugle autoforeur WO2020048553A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212019000368.0U DE212019000368U1 (de) 2018-09-04 2019-09-03 Selbstschneidender Blindniet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPUV2018-35313 2018-09-04
CZ2018-35313U CZ32431U1 (cs) 2018-09-04 2018-09-04 Samořezný trhací nýt

Publications (1)

Publication Number Publication Date
WO2020048553A1 true WO2020048553A1 (fr) 2020-03-12

Family

ID=64657132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2019/000042 WO2020048553A1 (fr) 2018-09-04 2019-09-03 Rivet aveugle autoforeur

Country Status (4)

Country Link
CZ (1) CZ32431U1 (fr)
DE (1) DE212019000368U1 (fr)
SK (1) SK9261Y1 (fr)
WO (1) WO2020048553A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200007256A1 (it) * 2022-04-12 2023-10-12 Bianchi Giuliano & Andrea Srl Rivetto a strappo

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ32431U1 (cs) * 2018-09-04 2018-12-18 Marian Gável Samořezný trhací nýt

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH673792A5 (en) * 1989-07-25 1990-04-12 Heinrich Keller Bedachungen Self drilling blind-riveting machine - has second drill bit between head and first one to widen hole
WO2014009753A1 (fr) * 2012-07-13 2014-01-16 Henrob Limited Appareil et procédés de rivetage aveugle
CZ32431U1 (cs) * 2018-09-04 2018-12-18 Marian Gável Samořezný trhací nýt

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH673792A5 (en) * 1989-07-25 1990-04-12 Heinrich Keller Bedachungen Self drilling blind-riveting machine - has second drill bit between head and first one to widen hole
WO2014009753A1 (fr) * 2012-07-13 2014-01-16 Henrob Limited Appareil et procédés de rivetage aveugle
CZ32431U1 (cs) * 2018-09-04 2018-12-18 Marian Gável Samořezný trhací nýt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200007256A1 (it) * 2022-04-12 2023-10-12 Bianchi Giuliano & Andrea Srl Rivetto a strappo

Also Published As

Publication number Publication date
CZ32431U1 (cs) 2018-12-18
SK9261Y1 (sk) 2021-08-11
DE212019000368U1 (de) 2021-04-08
SK500152021U1 (sk) 2021-04-14

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