EP1302258A1 - Echzeitüberwachung der Qualität einer Nietverbindung - Google Patents
Echzeitüberwachung der Qualität einer Nietverbindung Download PDFInfo
- 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- Withdrawn
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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)
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)
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)
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 |
-
2001
- 2001-10-11 EP EP01870215A patent/EP1302258A1/de not_active Withdrawn
Patent Citations (5)
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)
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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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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AKX | Designation fees paid | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20031017 |