WO2012041609A1 - Rivet aveugle - Google Patents

Rivet aveugle Download PDF

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Publication number
WO2012041609A1
WO2012041609A1 PCT/EP2011/064459 EP2011064459W WO2012041609A1 WO 2012041609 A1 WO2012041609 A1 WO 2012041609A1 EP 2011064459 W EP2011064459 W EP 2011064459W WO 2012041609 A1 WO2012041609 A1 WO 2012041609A1
Authority
WO
WIPO (PCT)
Prior art keywords
rivet
mandrel
ribbing
head
shaft
Prior art date
Application number
PCT/EP2011/064459
Other languages
German (de)
English (en)
Inventor
Fabio Luongo
Original Assignee
Adolf Würth GmbH & Co. KG
Würth International Ag
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 Adolf Würth GmbH & Co. KG, Würth International Ag filed Critical Adolf Würth GmbH & Co. KG
Publication of WO2012041609A1 publication Critical patent/WO2012041609A1/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
    • 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
    • F16B19/086—Self-piercing rivets

Definitions

  • Blind rivets are known in fastening technology. These contain a blind rivet, which can be deformed by means of a rivet mandrel to form a rivet head. To deform the blind rivet, pull on the rivet mandrel. There are rivet nets for this purpose. These engage the rivet mandrel with clamping jaws. The rivet mandrels are usually smooth, and attacking happens with traction. This adhesion leads to an elastic deformation, so that thereby also creates a kind of positive engagement.
  • the invention is based on the object to provide a rivet mandrel for a blind rivet, in which the tensile force can be initiated with greater certainty and accuracy.
  • the invention proposes a rivet mandrel with the features mentioned in claim 1. Further developments of the invention are the subject of dependent claims.
  • the ribbing such that it is formed by circumferential ribs and circumferential grooves formed between them.
  • the profiling of this ribbing can take various forms. For example, it may be a wave profile. Also possible is a sawtooth profile or a rectangular profile or trapezoidal profile.
  • According to the invention may be provided in a development that are formed in recesses of the ribbing in particular transversely to the longitudinal axis of the mandrel extending end surfaces. These faces then serve to transmit power from the jaws to the rivet.
  • the ribbing can be a rectangular profile, in which therefore the ribs and / or the grooves between the ribs are cylindrical. In this case, with the same depth of the recesses, the end surfaces have the largest possible size compared to other forms of ribbing.
  • the region in which the ribbing is provided extends over approximately one third of the length of the mandrel shaft.
  • the axial length of the ribbing can also be greater than the axial length of the clamping jaw area intended for engagement.
  • the predetermined breaking point between the mandrel head and the ribbing should serve to tear off the rivet mandrel after production of the rivet head at this point, so that as little as possible of the rivet mandrel stops at the connection point.
  • the functionality is however also given when the rivet mandrel breaks off at the ribbing. According to the invention can therefore be provided that the diameter in - - The grooves of the ribbing is still greater than the diameter of the rivet mandrel at the predetermined breaking point in order to effect the separation there.
  • the rivet mandrel can be used not only for a blind rivet that previously had a hole, but also for a rivet where a hole is punched using the rivet mandrel.
  • the rivet mandrel not only serves to transmit tensile forces, but also to transmit shear forces. It can be provided that a smooth guide section is formed between the end of the rivet mandrel facing away from the mandrel head and the ribbing. This can serve to guide the rivet mandrel during the firing process against kinking or evading.
  • the rivet mandrel can have a ribbing in the area adjacent to the abutment shoulder of the mandrel shaft, which is preferably formed like a sawtooth, with the teeth pointing in the direction of the abutment shoulder.
  • This type of formation of the rivet mandrel is of particular interest when the rivet mandrel is used for a weft rivet.
  • the saw teeth are to ensure that when shooting the rivet sleeve does not come off the mandrel.
  • the engagement between the saw teeth and the rivet sleeve can be improved by pressing, whereby the material of the rivet sleeve flows into the ribbing.
  • the mandrel head On the side facing away from the contact shoulder, the mandrel head can have the form of a truncated cone in a further development of the invention.
  • a cone angle in the range of 40 ° to 70 ° may be provided.
  • the mandrel head on its side facing away from the contact shoulder has a punching element, if the rivet mandrel is to be used for a Schussniet.
  • this punching element is preferably present - - arranged the truncated cone.
  • the punching element is formed on a cylindrical extension, for example, characterized in that this cylindrical extension is cut off obliquely, in particular between 30 and 70 °.
  • the rivet mandrel is part of a blind rivet, which has a rivet head and a rivet, wherein the rivet sleeve rests with its front end to the abutment shoulder.
  • the predetermined breaking point is disposed within the rivet sleeve.
  • the rivet sleeve has a predetermined deformation point whose distance from the underside of the rivet head is or can be adapted to the thickness of the material in which the blind rivet is to be set.
  • FIG. 2 shows the view of a rivet mandrel
  • FIG. 1 shows the front end of a rivet mandrel which contains a mandrel shaft 1 and a mandrel head 2 arranged at the front end of the mandrel shaft 1.
  • the mandrel shaft 1 is cylindrical and has a constant diameter.
  • the mandrel head 2 has on its underside facing the mandrel shaft 1 an abutment shoulder 3 which lies in a plane perpendicular to the longitudinal axis of the mandrel shaft 1.
  • the diameter of the front end of the mandrel head 2 is reduced to a diameter corresponding to the diameter of the mandrel shaft 1.
  • a front cylindrical section 5 is then formed which ends in an inclined surface 6. Due to the oblique course of the front end of the mandrel head 2, a sharp edge 7 is formed, which serves to initiate a punching operation.
  • a rivet body 8 is arranged on the adjoining the mandrel head 2 part of the mandrel shaft 1.
  • the rivet body 8 includes a rivet head 9 with a bottom 10 which lies in a direction transverse to the longitudinal axis of the mandrel shaft 1 level.
  • a rivet sleeve 1 1 goes out, which rests with its front end on the abutment shoulder 3 of the mandrel head 2.
  • the mandrel shaft 1 holding grooves 12 with a sawtooth profile, wherein the sharp edge of the sawtooth profile is directed towards the abutment shoulder 3.
  • the mandrel shaft 1 At a distance from the holding grooves 12, the mandrel shaft 1 includes a constriction 13, in which the diameter of the mandrel shaft 1 is reduced so far that it can act as a predetermined breaking point. This constriction 13 is still within the rivet sleeve 1 1. - -
  • the rivet sleeve 1 1 has on its outside a point 14 in which the wall thickness is reduced. This is not intended to form a predetermined breaking point, but a desired deformation point.
  • the distance of this reduction of the wall thickness from the underside 10 of the rivet head 9 advantageously corresponds to the thickness of the material in which the illustrated rivet sleeve is to be used.
  • the rivet head which is to be formed by the deformation of the front part of the rivet sleeve 1 1, begins to form at this point.
  • FIG. 2 shows an overall view of the rivet mandrel of FIG. 1 without the rivet body 8.
  • a short smooth guide section 15 is formed, in which the diameter of the mandrel shaft 1 has the same value as at the area to be arranged inside the rivet sleeve 1 and in the front section 5.
  • the mandrel shaft 1 has a plurality of ribs 17 and grooves 18 formed between the ribs.
  • these are ribs and grooves with a rectangular profile. Due to the difference in diameter between the ribs and the grooves here a plurality of transverse to the longitudinal axis of the mandrel shaft 1 extending annular end faces is formed, on which a tool for setting the blind rivet can engage positively.
  • the diameter of the mandrel shaft 1 in the grooves 18 is greater than the diameter of the mandrel shaft 1 in the constriction 13th
  • FIG. 3 shows, on a further enlarged scale, the mandrel head 2.
  • the shape of the holding grooves 12 and their sawtooth shape can be seen.
  • the sharp edges of the holding grooves 12 are thus oriented in the direction of the contact surface 3 on the underside of the mandrel head 2.
  • FIG. 4 shows, on an enlarged scale, the constriction 13 which is produced during rolling of the rivet mandrel.
  • the depression 13 By rolling the depression 13, small elevations are created on both sides, which increase this constriction. - limit both sides.
  • the grooves 18 and the constriction 13 as well as the holding grooves 12 are made by rolling.
  • the rivet mandrel is inserted into the rivet sleeve from the left in FIG. 1 until the abutment shoulder 3 comes into contact with the end face of the rivet sleeve 11.
  • the holding grooves 12 do not hinder this by their orientation.
  • the rivet mandrel consists here of steel, advantageously A2 or A4 steel, and has a stiffness or strength of 1300 N / m 2 - 1800 N / m 2 . Instead of a cylindrical cross section of the mandrel shaft and a polygonal cross-section, for example, 3-, 4- or 5-angular, in particular with rounded corners have.
  • the rivet mandrel shown in FIG. 2 has 13 grooves 18.
  • the jaws of a rivet setting device for pulling on the rivet mandrel have a gripper ribbing which is congruent with the ribbing of the rivet mandrel.
  • the number of ribs of the gripper ribbing may correspond to the number of grooves 18 of the ribbing of the mandrel shaft, but then exact positioning of the rivet in the rivet setting device is required.
  • the number of ribs of the gripper ribbing is smaller than the number of grooves 18 of the ribbing of the mandrel, in this case, for example, 9 ribs in the gripper ribbing.
  • the ribs and grooves are those with a rectangular profile.
  • the side walls of the grooves and the ribs can independently assume different angles to the longitudinal axis, but advantageously in a range between 45 and 90 °. It is advantageous if the side walls of the ribs are slightly inclined with their respective end to the outside, thereby achieving a centering of the rivet relative to the clamping jaws when closing the same.

Landscapes

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

Abstract

L'invention porte sur un rivet aveugle. Une tige de rivet pour rivet aveugle, en particulier un rivet à pousser, comprend dans la région de son extrémité éloignée de la tête de tige (2), un rétrécissement comportant des nervures circonférentielles (17) et des gorges circonférentielles (18) formées entre ces nervures. Sous l'effet de la différence de diamètre entre les nervures (17) et les gorges (18), il se forme dans les gorges (18) des surfaces frontales annulaires qui s'étendent transversalement à l'axe longitudinal de la tige de rivet et permettent de cette façon d'obtenir une prise en traction. Grâce au nervurage, il est possible pour un outil d'attaquer la tige de rivet avec une liaison par coopération de formes.
PCT/EP2011/064459 2010-08-24 2011-08-23 Rivet aveugle WO2012041609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010039668 2010-08-24
DE102010039668.0 2010-08-24

Publications (1)

Publication Number Publication Date
WO2012041609A1 true WO2012041609A1 (fr) 2012-04-05

Family

ID=44509360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/064459 WO2012041609A1 (fr) 2010-08-24 2011-08-23 Rivet aveugle

Country Status (1)

Country Link
WO (1) WO2012041609A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527596A (zh) * 2013-10-30 2014-01-22 无锡安士达五金有限公司 钛合金折叠式防震铆钉
WO2014146834A1 (fr) * 2013-03-18 2014-09-25 Adolf Würth GmbH & Co. KG Rivet à tirer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2334385A1 (de) * 1973-07-06 1975-01-23 Hestermann Gerhard Mietverbindungselemente zum blindnieten von blechen
GB2060110A (en) * 1979-09-28 1981-04-29 Avdel Ltd Self-plugging Blind Rivet
GB2177770A (en) * 1985-07-12 1987-01-28 Avdel Ltd Self-plugging blind fastener
EP1498617A2 (fr) * 2003-07-16 2005-01-19 Newfrey LLC Fixation en aveugle en trois parties

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2334385A1 (de) * 1973-07-06 1975-01-23 Hestermann Gerhard Mietverbindungselemente zum blindnieten von blechen
GB2060110A (en) * 1979-09-28 1981-04-29 Avdel Ltd Self-plugging Blind Rivet
GB2177770A (en) * 1985-07-12 1987-01-28 Avdel Ltd Self-plugging blind fastener
EP1498617A2 (fr) * 2003-07-16 2005-01-19 Newfrey LLC Fixation en aveugle en trois parties

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014146834A1 (fr) * 2013-03-18 2014-09-25 Adolf Würth GmbH & Co. KG Rivet à tirer
DE102013204734A1 (de) * 2013-03-18 2014-10-02 Adolf Würth GmbH & Co. KG Schussniet
CN103527596A (zh) * 2013-10-30 2014-01-22 无锡安士达五金有限公司 钛合金折叠式防震铆钉

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