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Viewing 1 to 30 of 19499
2016-09-27
Technical Paper
2016-01-2089
Jose Guerra cEng, Miguel Angel Castillo
During the year 2003 Aernnova decided to invest in automated machines procuring and installing a Broetje automatic machine (known in Aernnova as CIMPA) in Aernnova Berantevilla facility in order to perform operations such as drilling, countersinking or riveting in aircraft structures during its assembly. Due to the high load of work at that time in Aernnova mainly due to work packages from Embraer and Sikorsky, a solution was needed in order to assemble all the products required by our customer and deliver them on properly in terms of time and good quality. Several ideas came to our engineering team always having in mind the idea of reducing time being more competitive specially in repetitive operations and at the same time keeping good quality. Finally after a depth search, the option selected was an automated machine from Broetje that after some adjustments and customizations regarding our purposes could provide us the best solution.
2016-09-27
Technical Paper
2016-01-2083
Steven P. Smith
This paper traces the development of a single sided blind fastener at Airbus’ Broughton’s plant, commencing with the initial identification of the need for the A380XWB programme, through various prototypes testing early production trials. These requirements were further refined for A350XWB, resulting in a new contending fastener design, further evaluation and testing before pre-production trials and selection for A350XWB programme. Experience gained has led to further design development by the supplier leading to its current applications which are explained and the next steps of our Journey.
2016-09-27
Technical Paper
2016-01-2085
Kyle Pritz, Brent Etzel, Zheng Wei
The automation takt time of wing assembly can be shortened with the use of single-sided temporary fasteners by providing temporary part clamping and doweling during panel drilling. Feeding these fasteners poses problems due to their complexity in design and overall heavy weight. In the past, Electroimpact has remotely fed these fasteners by blowing them through pneumatic tubing. This technique has resulted in occasional damage to fasteners during delivery and a complex feed system that requires frequent maintenance. Due to these issues, Electroimpact has developed a new fully automated single-sided temporary fastening system for installation of the LISI Clampberry fasteners in wing panels for the C919 wing factory in Yanliang, China. The feed system stores fasteners in gravity-fed cartridges on the end effector near the point of installation.
2016-09-27
Technical Paper
2016-01-2128
Henry Guo, Farid Ahdad, DeDong Xie
V-band joint is widely used in turbocharger industry. It is used to connect housings in turbocharger for both passenger vehicle and commercial vehicle applications, which can provide simple and robust solutions to replace bolt flanges. However, current issue for V-band joint in turbine side is the higher cost. The major cost for V-band joint comes from T-bolt which works in very hostile environment with high temperature and high vibration level. T-bolt is made from special stainless steel which takes around a half cost of total joint. This paper introduces a new V-band joint which replaces T-bolt from special bolt to standard bolt through changing bolt stress status from tension to compression, which provides possibility to reduce cost greatly. The prototype is made and performed static tests including anti-rotating torque test and salt spray test.
2016-09-27
Technical Paper
2016-01-2087
Hunter O'Folan, Peter B. Zieve
There is an ever present risk of the lower ram of a riveting machine crashing into and damaging stringers and clips. The risk becomes greater as the parts get deeper and fasteners move closer to the web. In designing a riveting machine for the Lockheed C-130 we were concerned about the long lower anvil working in a challenging environment. We wanted the lower ram to drop down without causing damage even if the upset ram is offset and wrapped around a part. But we also wanted the lower tool to crash from the side without causing damage. Once this is achieved we have crash protection from five of six sides. A competing requirement is the need to strip collars. At Electroimpact we prefer to use the up-down action in the lower ram to do the stripping. We checked for the most difficult collar to strip and found that a 3/8 GP collar can take up to 3000 pounds of force to strip. Therefore we had a target that the magnetic pull-down on the lower anvil should exceed 3000 pounds.
2016-09-27
Technical Paper
2016-01-2103
Eric Barton
This technical paper details an optimized Drivmatic machine design delivered to a Tier 1 aero structure supplier to automate drilling and installation of rivets, hi-loks, lockbolts & swage collars for individual fuselage panel assemblies with high throughput & strict quality requirements. While certain robot solutions continue to be explored for specific applications at many Tier 1 aero structure suppliers, robot payload capacity has limitations beyond certain criteria, which often times point towards an alternative machine design as in this case study. A typical approach for adding more automation is to allocate shop floor space based on the solution's foot print, however contrary to most approaches this solution had to be designed to fit within a pre-determined factory footprint over a geographic location with a high water table that would not permit a foundation.
2016-09-27
Technical Paper
2016-01-2080
Carter L. Boad, Kevin Brandenstein
The newest generation of automated fastening machines require a feed system that is smaller, more flexible, and faster than any currently available. The feed system must be compact enough to fit on a robot base, yet have a capacity large enough to support unmanned production for hours. A large variety of fasteners must be supported and the entire system must be reloaded or reconfigured in minutes to match the next work piece being assembled by the machine. When requested by the part program, the correct fastener must be released directly and immediately into the feed tube to minimize cycle time. This paper describes a new “plate cartridge” feed system developed to meet these needs.
2016-09-27
Technical Paper
2016-01-2084
Curtis Hayes
Successfully riveting aerospace fatigue-rated structure (for instance, wing panels) requires achieving rivet interference between a minimum and a maximum value in a number of locations along the shank of the rivet. In unbalanced structure, where the skin is much thicker than the stringer, this can be particularly challenging, as achieving minimum interference at D2 (the exit of the skin) can often be a problem without exceeding the maximum interference at D4 (exit of the stringer). Softer base materials and harder, higher-strength rivets can compound the problem. This paper presents a solution that has been successfully implemented on a production commercial aircraft. The application of a special coating on the tail side die dramatically reduces D4 interference, which in some instances resulted in a reduction of more than 30%. This allowed an increase in forming force to increase D2 interference and made for a much more robust process.
2016-09-27
Technical Paper
2016-01-2079
Alexander Janssen, Thorsten Dillhoefer
The industry wide requirement of new highly flexible automated fastening systems in aircraft production has created the need for developing new fastening systems. This paper will focus on the development of the Frame Riveting Assembly Cell (FRAC) by BROETJE-Automation to meet this need. The new FRAC machine configuration is built for automated drilling and fastening of different aircraft type panels. It is highly flexible with a high speed positioning system mounted outer end effector. System travel is limited only by installed track length. The FRAC integrates well with conventional and reconfigurable automated fastening work holding tools.
2016-09-27
Technical Paper
2016-01-2098
Christophe Vandaele, Didier Friot, Simon Marry, Etienne Gueydon
With more than 10 000 aircrafts in their order backlog, automated assembly is of critical importance to the progress for aircraft manufacturers. Moreover to obtain maximum benefit from automation, it is necessary to achieve not only an integrated fastener cell, but also a real breakthrough in fasteners technology. The optimum solution, known as "One Side Assembly", performs the whole assembly sequence from one side of the structure using an accurate robot arm equipped with a Multi function End effector and high performances fasteners. This configuration provides an efficient and flexible automated installation process, superior to current solutions which are typically, large scale, capital intensive, systems, which still require operators to complete or control the fastener installation. The search for a technological breakthrough in this domain has been targeted for more than 15 years by the majors aircrafts manufacturers.
2016-09-27
Technical Paper
2016-01-8062
Jham Kunwar Tikoliya, Ram Krishna Kumar Singh, Ramesh Kumar, Suresh Kumar Kandreegula
The existing head cover is having external oil and blow by separation unit, which is not only costlier but also complex and leads to increase the overall height of engine which was difficult to integrate in new variants of vehicles. Existing head cover sealing system was also not foolproof and with slight variation in part dimensions, there were high chances of leakage. A new head cover has been designed with internal baffle type oil and blow by separation system to ensure efficient separation and proper packaging of the system in new varients.The new system has been finalized after 26 DOEs of different wire mesh sizes and different baffle plate size and positions. The final system has two bowl shaped separation unit with wire mesh with two cup type oil separation passages and one baffle plate for separating blow by. The system works on condensation and gravity method. The blow by is guided through a well-defined passage integrated in aluminum cylinder head cover itself.
2016-09-27
Technical Paper
2016-01-2081
Rodrigo Pinheiro, Robert Gurrola
The installation of common threaded aerospace fasteners by the application of a tightening torque to a nut or deformable locking collar is made possible by an internal wrenching element or recess feature adapted to the threaded end of a pin which accepts a mating anti-rotation key designed to partially balance or counter the applied torque. In highly-demanding applications such as the mechanical joining of composite structures accomplished by wet clearance fit installations of permanent fasteners, high nut or collar seating torques not adequately opposed by frictional resistance at the contact surfaces of the fastener and joint members effectively shift a greater proportion of the torque reaction requirement onto the recess and mating anti-rotation key which in turn can experience high torsional stresses exceeding their design capability and result in frequent service failures.
2016-09-18
Technical Paper
2016-01-1958
Seungpyo Lee, Nahyon Lee, Jongkeun lim, Jungyang Park
Automotive Generation 3 wheel bearings play important roles including transmission of power and carrying vehicle weight and are designed to last the life of a vehicle without servicing. When mounted to the vehicle steering knuckle by bolts, distortion occurs to the outer ring, including the seal mounting location and raceways, which can affect this performance. In this paper, finite element methods using commercial software MSC.MARC is performed to analyze the outer ring distortion. Elasto-plastic and contact analyses are carried out to compute the clamping behavior of the outer ring, bolts, and the knuckle under various conditions. In particular, evaluating the effect of concavity of the outer ring flange to reduce outer ring deformation and ensure optimum bearing fatigue life performance is considered.
2016-09-18
Technical Paper
2016-01-1959
Laura Sguotti, Davide Olivieri, Domenico Bosco
For the first time in history, in December 2015, 195 countries reached a universal and legally binding global climate agreement at the Paris climate conference (COP21). The agreement is challenging, as the target is to keep the global warming below two degrees Celsius by 2100, compared to the temperature in pre-industrial levels. Without a global action, current previsions for global warming are above four degree Celsius. Two thirds of the greenhouse gases, responsible for the global warming, are carbon dioxide (CO2) mainly coming from the combustion of fossil fuels. Transportation contributes to around 30% (reference U.S.) of the CO2 emissions. It is clear how important it is for original equipment manufacturers (OEMs) to reduce the emission of their vehicles. SKF is firmly committed to take its responsibility to actively contribute to a better, cleaner future. SKF BeyondZero is the Group's strategy to increase the positive impact on the environment.
2016-09-18
Technical Paper
2016-01-1956
Robert G. Sutherlin, Douglas Reed
Noise from contaminant ingress is one of the largest durability issues for wheel bearings at higher mileage and higher vehicle exposure. Protecting the bearings seals from splash is a key step in extending seal life. Benchmarking has shown a variety of different corner designs to protect the bearing from splash. This study examines the effect of factors such as the radial gap between CVJ slinger and the knuckle, knuckle labyrinth height, and different slinger designs to minimize the amount of splash to the bearing inboard seal. The study reviews the different spray methods that were applied to confirm the robustness of the various designs.
2016-09-18
Technical Paper
2016-01-1960
Yukihisa Takayama, Bradley James Williams
Currently automotive demand has rapidly expanded in newly emerging markets and countries with developing infrastructure. Rolling bearings for automotive wheels, Hub Unit Bearings, used in the new markets, are required to prevent premature failures due to water ingress into the bearing. Extreme weather and developing infrastructure in emerging markets causes the bearings to be exposed to large amounts of contamination and water. This level of exposure can potentially generate damage to the Hub Unit Bearing rolling surfaces. Automotive bearings are also required to incorporate low friction technology to reduce overall fuel consumption of automobiles. Growth in emerging markets tends to increase the amount of global carbon dioxide emissions. The use of low friction technologies in automotive bearings can contribute to a reduction in carbon dioxide emissions for the automotive industry.
2016-09-18
Technical Paper
2016-01-1957
Seonho Lee, Heejae Kang, Ohchul Kwon, Chirl Soo Shin
A trend in automotive parts development is the pursuit of long life, high quality and reliability. The increase in service life of automotive wheel bearings, by improving the rolling contact fatigue (RCF) life of bearing steels, was investigated. Conventional studies of bearing steels and heat treatments have dealt with quenching and tempering (Q/T) in 52100 steel. This study is a new trial to increase the strength of bearing steels by special austempering in phases after general Q/T heat treatments.
2016-07-26
WIP Standard
AS7478D
This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable iron base alloy of the type identified under the Unified Numbering System as UNS S66286.
2016-07-22
WIP Standard
AS100026B
No scope available
2016-07-22
WIP Standard
AS4877F

This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718.

2016-07-22
Standard
AS3547A
SCOPE IS UNAVAILABLE.
2016-07-22
Standard
AS3548A
SCOPE IS UNAVAILABLE.
2016-07-22
Standard
AS3550A
SCOPE IS UNAVAILABLE.
Viewing 1 to 30 of 19499

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