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Optimization of Automated Airframe Assembly Process on Example of A350 S19 Splice Joint

Airbus-Elodie Bonhomme, Pedro Montero-Sanjuan
Peter the Great St. Petersburg Polytechnic University-Sergey Lupuleac, Julia Shinder, Maria Churilova, Nadezhda Zaitseva, Valeriia Khashba
Published 2019-09-16 by SAE International in United States
The paper presents the numerical approach to simulation and optimization of A350 S19 splice assembly process. The main goal is to reduce the number of installed temporary fasteners while preventing the gap between parts from opening during drilling stage. The numerical approach includes computation of residual gaps between parts, optimization of fastener pattern and validation of obtained solution on input data generated on the base of available measurements. The problem is solved with ASRP (Assembly Simulation of Riveting Process) software. The described methodology is applied to the optimization of the robotized assembly process for A350 S19 section.
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New Technologies for Airframe Structural Assemblies

LISI Aerospace-Mehdi Dahane
Published 2019-09-16 by SAE International in United States
With air traffic demand constantly increasing and several years of aircraft production in their backlog, major aircraft manufacturers are now shifting their focus toward improving assembly process efficiency. One of the most promising solutions, known as “One Side Assembly”, aims to perform the whole assembly sequence from one side of the structure (drilling, temporary fastener installation and removal, blind fastener installation, assembly control) and with a high level of integrated automation. Investments in robotic equipment, automation engineering and innovation are very active and automation capabilities have already increased a lot in the aerospace industry. As an example, drilling operations for large dimensions airframe are clearly moving from manual to automated. However, despite more and more clever and sophisticated robotics, the use of historical fasteners with two side installation method remains a strong limitation to innovative automated assembly sequences. A blind fastener which can provide the same mechanical characteristics than current structural fasteners, while providing automation friendly features and meeting cost objectives is a real “must have” for assembly process efficiency improvements. It is also full…
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Improving Competitiveness of Additive Manufacturing Aerospace Serial Parts

LISI Aerospace-Maxime Gas, Alexis Rene-Corail, Sebastien Eyrignoux, Guillaume Iker, Stephane Sudre
Published 2019-09-16 by SAE International in United States
The Powder Bed Fusion technology is exploding in aerospace industry, with various parts adapted to this process. But one of the main limiting factor to use it in the aircraft industry is quantity of parts that can be manufactured per machine within a year.As a major leader in the aerospace fastener industry, LISI AEROSPACE has a long experience in reducing wasted time. Two activities are developed in this article: Decreasing production time thanks to a support structure reduction and simulationMinimizing unproductive time between two consecutive batches, thanks to manufacturing change improvement (LEAN)We took the example of a serial aircraft part, produced on the CONCEPT LASER M1 machine. With these two activities, we save 253 minutes per production. Originally, we had 4 batches per week; after these activities, we can produce 5 batches per week.
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Simulation of Aircraft Assembly via ASRP Software

Airbus-Elodie Bonhomme
Peter the Great St. Petersburg Polytechnic University-Nadezhda Zaitseva, Tatiana Pogarskaia, Olga Minevich, Julia Shinder
Published 2019-09-16 by SAE International in United States
ASRP (Assembly Simulation of Riveting Process) software is a special tool for assembly process modelling for large scale airframe parts. On the base of variation simulation, ASRP provides a convenient way to analyze, verify and optimize the arrangement of temporary fasteners. During the assembly of airframe certain criteria on residual gap between parts must be fulfilled. The numerical approach implemented in ASRP allows to evaluate the quality of contact on every stage of assembly process and solve verification and optimization problems for temporary fastener patterns. The paper is devoted to description of several specialized approaches that combine statistical analysis of measured data and numerical simulation using high-performance computing for optimization of fastener patterns, calculation of forces in fasteners needed to close initial gaps, and identification of hazardous areas in junction regions via ASRP software.
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Torque-Tension Test Procedure for Steel Threaded Fasteners - Inch Series

Fasteners Committee
  • Ground Vehicle Standard
  • J174_201908
  • Current
Published 2019-08-07 by SAE International in United States

This test procedure is intended to provide a quality control method for checking torque-tension characteristics of non-prevailing torque type threaded steel fasteners 1/4 through 1 in nominal diameters. Realistically, torque-tension relationships for specific individual fastener assembly joints will vary due to the different joint parameters. Tests using actual joint components will be required to determine accurate torque-tension values for those conditions. For the metric version, see SAE J174M.

Deployable Emergency Shutoff Device Blocks High-Velocity Fluid Flows

  • Magazine Article
  • TBMG-34931
Published 2019-08-01 by Tech Briefs Media Group in United States

NASA's Marshall Space Flight Center has developed a device and method for blocking the flow of fluid from an open pipe. The device plugs, controls, and meters the flow of gases and liquids. Anchored with friction fittings, spikes, or explosively activated fasteners, the device is well-suited for harsh environments and high fluid velocities and pressures. With the addition of instrumentation, it can also be used as a variable-area flow metering valve that can be set based upon flow conditions. With robotic additions, it can be configured to crawl into a pipe and then anchor and activate itself to block or control fluid flow.

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Fastener Hardware for Wheels for Demountable Rims

Truck and Bus Wheel Committee
  • Ground Vehicle Standard
  • J1835_201906
  • Current
Published 2019-06-17 by SAE International in United States
This SAE Recommended Practice establishes the mounting hardware to be used with demountable rims, wheels for demountable rims, rim spacers designed for 28 degrees bevel mounting systems, and intended for use on commercial vehicles. The dimensions given are those necessary to maintain serviceability and interchangeability of mounting hardware. This document is divided into two sections. Section 1 establishes the practice for new designs for mounting hardware. Section 2 records information on current mounting hardware. Special and less common applications are not covered in this document.
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AGS2067AR Amendment Record for Drawing Standard No. AGS2067

Engine and Airframe Technical Standards Committee (TSC)
  • SAE ITC E&A Standard
  • AGS2067AR-7
  • Current
Published 2019-06-13 by SAE Industry Technologies Consortia in United States

No scope available.

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AGS2067 Chobert 100° Countersunk Rivet, Steel

Engine and Airframe Technical Standards Committee (TSC)
  • SAE ITC E&A Standard
  • AGS2067-7
  • Current
Published 2019-06-13 by SAE Industry Technologies Consortia in United States

No scope available.

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PIN, COTTER - CRES, UNS S30200, AS7210

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS123751C
  • Current
Published 2019-06-06 by SAE International in United States
No Abstract Available.
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