EP1302258A1 - Echzeitüberwachung der Qualität einer Nietverbindung - Google Patents

Echzeitüberwachung der Qualität einer Nietverbindung Download PDF

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Publication number
EP1302258A1
EP1302258A1 EP01870215A EP01870215A EP1302258A1 EP 1302258 A1 EP1302258 A1 EP 1302258A1 EP 01870215 A EP01870215 A EP 01870215A EP 01870215 A EP01870215 A EP 01870215A EP 1302258 A1 EP1302258 A1 EP 1302258A1
Authority
EP
European Patent Office
Prior art keywords
rivet
assembly
curve
ring
displacement
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01870215A
Other languages
English (en)
French (fr)
Inventor
Samuel Colboc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aero Boosters SA
Original Assignee
Techspace Aero SA
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 Techspace Aero SA filed Critical Techspace Aero SA
Priority to EP01870215A priority Critical patent/EP1302258A1/de
Publication of EP1302258A1 publication Critical patent/EP1302258A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21J15/10—Riveting machines
    • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
    • B21J15/285—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups for controlling the rivet upset cycle
    • 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
    • B21J15/022—Setting rivets by means of swaged-on locking collars, e.g. lockbolts

Definitions

  • the present invention relates to a new real-time validity check process of an assembly with rivets crimped by plastic deformation.
  • the scope of the invention is that of riveted assemblies with very high requirements of quality, in particular completely free from defects, such as example those required in the aeronautical field.
  • the general principle of riveting is to pass a rod through two mechanical parts to assemble and crush this rod on either side of joining to form a head. Both pieces are then sealed together between the two rivet heads.
  • the material constituting the rivet should preferably have the same physical and mechanical characteristics as parts to assemble. The use of different materials may cause seal defects due to either fatigue of the material, or galvanic corrosion.
  • This undesirable fixing method is particularly suitable in the case of strong vibrations, shock or significant temperature variations.
  • the type of rivet doing more particularly the object of the present invention is a rivet composed of two distinct elements, a rod and a Ring.
  • the LockBolt TM rivet presents in particular the advantage of low installation cost and good resistance to fatigue and vibration. It is typically composed of two parts: a central rod breakable and an outer concentric ring or sleeve, in deformable alloy.
  • the rivet is threaded into the hole blind side (i.e. internal).
  • the assembly is then carried out using a tool, a pliers or an ad hoc pneumatic tool, including the fitting nose is placed externally on the rod, pressing against the ring. Tool pulls rod, plate parts, usually sheets, against each other others, then crimps the ring on the locking grooves of the stem. The tool continues its tractive effort until the rod is blocked and broken, essentially flush with the ring. The pose nose emerges then the crimped ring.
  • the present invention aims to provide a solution to overcome the disadvantages of the state of the art.
  • the invention aims to provide a quantitative and automated control process in real time the quality of an assembly by rivets.
  • the invention has so the goal is to simultaneously perform the operations of riveting and control.
  • An additional aim of the invention is to do not require any post-assembly checks.
  • Another object of the invention is still improve the reliability and reproducibility of the process assembly by rivets.
  • the present invention relates to a method of control of an assembly of at least two parts, preferably two sheets, by means of a rivet crimping, said rivet comprising a central rod surrounded by a outer ring, intended to be crimped by deformation plastic, characterized in that the quality evaluation of the assembly, and consequently the validation or rejection of the assembled part is based on real-time measurement, simultaneously with the completion of each step of the process of assembly, of the curve of the effort printed at each instant on the rivet, in particular the effort required to the plastic deformation of the ring depending on the displacement of the head of a tool carrying out said plastic deformation.
  • each point critical pertaining to a control area we control if each measured point is located in a tolerance zone defined with respect to the corresponding point of a curve reference, in which case the assembly is validated qualitatively.
  • a assembly including the effort / displacement control curve has at least one critical point measured outside tolerance, is rejected qualitatively.
  • the material constituting said rivet is steel, aluminum or copper.
  • said rivet is a rivet composed of two distinct elements, a rod and a ring, preferably a LockBolt TM type rivet or a rivet blinded.
  • Figure 1 shows a set of curves force-displacement characteristics of an assembly by rivet, which are used in the control process according to the invention.
  • Figures 2.a to 2.d show schematically the four distinct phases of implementation LockBolt TM type rivet.
  • Figure 3 shows the four phases typical of riveting, in the case of the LockBolt TM rivet, represented on a force-displacement curve and corresponding to the sequence of figures 2.a to 2.d.
  • the principle behind the method of control of the present invention is based on the measurement in real time and simultaneous force applied to the rivet and displacement of the head of the traction tool.
  • the proposed method consists in analyzing a set of critical points extracted from the curve corresponding effort / displacement, obtained from the simultaneous measurement of these two parameters.
  • the number of points to analyze may possibly vary. As for example, in Figure 1, four areas of control 4, i.e. four analysis points corresponding to a reference curve 1, with a predetermined tolerance
  • Tolerances will be determined based on of each particular type of riveted assembly.
  • the effort / displacement curve allows identify four distinct phases requiring a control and described in figure 2.a to 2.d. These phases, also shown in Figure 3, are described below.
  • the jaws 13 located in the head of the fitting tool 10 encloses the end of the rod 11 at level of its gorges. Trigger depression the tool drives the piston 14: this one as well as the jaws move back, relative to the sleeve 15 constituting the assembly nose, blocking the ring 12 against the rod and the surface to be assembled 5.
  • the assembly nose produces the plastic deformation of the ring in the preceding part the first crimping tooth 16 on the rod 11. The effort gradually increases.
  • the assembly nose 15 progressively advances on the ring 12 in the crimping area (grooves blocking of the rod 17) until the complete engagement of the entire contact surface 18, the effort becoming bigger and bigger.
  • the total duration of crimping is less than 2 seconds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
EP01870215A 2001-10-11 2001-10-11 Echzeitüberwachung der Qualität einer Nietverbindung Withdrawn EP1302258A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01870215A EP1302258A1 (de) 2001-10-11 2001-10-11 Echzeitüberwachung der Qualität einer Nietverbindung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01870215A EP1302258A1 (de) 2001-10-11 2001-10-11 Echzeitüberwachung der Qualität einer Nietverbindung

Publications (1)

Publication Number Publication Date
EP1302258A1 true EP1302258A1 (de) 2003-04-16

Family

ID=8185029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01870215A Withdrawn EP1302258A1 (de) 2001-10-11 2001-10-11 Echzeitüberwachung der Qualität einer Nietverbindung

Country Status (1)

Country Link
EP (1) EP1302258A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7055393B2 (en) 2002-07-18 2006-06-06 Newfrey Llc Blind fastener setting tool
US7802352B2 (en) 2005-04-13 2010-09-28 Newfrey Llc Monitoring system for fastener setting tool
DE102014215167A1 (de) * 2014-08-01 2016-02-18 Robert Bosch Gmbh Schraub- und/oder nietsystem und verfahren zum überwachen eines schraub- und/oder nietsystems
WO2019020959A1 (fr) 2017-07-28 2019-01-31 Safran Procédé de rivetage pour aéronef
EP3626361A1 (de) * 2018-09-24 2020-03-25 The Boeing Company Sensorbasierte steuerung von stauchwerkzeugen
US11052454B2 (en) 2019-07-23 2021-07-06 The Boeing Company Dynamic collar swage conformance checking based on swage tool parameters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163311A (en) * 1977-02-28 1979-08-07 Sps Technologies, Inc. Tightening system for blind fasteners
DE4401134A1 (de) * 1994-01-17 1995-07-27 Infert Gmbh Verfahren zur Überwachung der Verarbeitung von Blindbefestigern
DE4429225A1 (de) * 1994-08-18 1996-02-22 Weber Schraubautomaten Blindnietverfahren und -vorrichtung
EP0738551A2 (de) * 1995-04-20 1996-10-23 Emhart Inc. Vorrichtung und Verfahren zur Überprüfung des Setzens von Blindnieten
EP0893179A2 (de) * 1997-07-21 1999-01-27 Emhart Inc. Verfahren und Vorrichtung zur Formung einer Stanznietverbindung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163311A (en) * 1977-02-28 1979-08-07 Sps Technologies, Inc. Tightening system for blind fasteners
DE4401134A1 (de) * 1994-01-17 1995-07-27 Infert Gmbh Verfahren zur Überwachung der Verarbeitung von Blindbefestigern
DE4429225A1 (de) * 1994-08-18 1996-02-22 Weber Schraubautomaten Blindnietverfahren und -vorrichtung
EP0738551A2 (de) * 1995-04-20 1996-10-23 Emhart Inc. Vorrichtung und Verfahren zur Überprüfung des Setzens von Blindnieten
EP0893179A2 (de) * 1997-07-21 1999-01-27 Emhart Inc. Verfahren und Vorrichtung zur Formung einer Stanznietverbindung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7055393B2 (en) 2002-07-18 2006-06-06 Newfrey Llc Blind fastener setting tool
US7802352B2 (en) 2005-04-13 2010-09-28 Newfrey Llc Monitoring system for fastener setting tool
DE102014215167A1 (de) * 2014-08-01 2016-02-18 Robert Bosch Gmbh Schraub- und/oder nietsystem und verfahren zum überwachen eines schraub- und/oder nietsystems
WO2019020959A1 (fr) 2017-07-28 2019-01-31 Safran Procédé de rivetage pour aéronef
FR3069467A1 (fr) * 2017-07-28 2019-02-01 Safran Procede de rivetage pour aeronef
CN111050945A (zh) * 2017-07-28 2020-04-21 赛峰集团 飞机的铆接方法
US11052452B2 (en) 2017-07-28 2021-07-06 Safran Riveting method for aircraft
CN111050945B (zh) * 2017-07-28 2021-12-31 赛峰集团 飞机的铆接方法
EP3626361A1 (de) * 2018-09-24 2020-03-25 The Boeing Company Sensorbasierte steuerung von stauchwerkzeugen
US11273931B2 (en) 2018-09-24 2022-03-15 The Boeing Company Sensor based control of swage tools
US11731787B2 (en) 2018-09-24 2023-08-22 The Boeing Company Sensor based control of swage tools
US11052454B2 (en) 2019-07-23 2021-07-06 The Boeing Company Dynamic collar swage conformance checking based on swage tool parameters

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