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Viewing 31 to 60 of 21400
2017-09-19
Technical Paper
2017-01-2150
Joshua Cemenska, Todd Rudberg, Michael Henscheid, Andrew Lauletta, Bradley Davis
In AFP manufacturing systems a large portion of total production time is consumed by inspection. The aerospace industry is responding to this inefficiency by focusing on the development of automated inspection systems. The first generation of automated inspection systems are now entering production. This paper reviews the performance of the first generation system and discusses reasonable expectations. Estimates of automated inspection time will be made, and it will be shown that the automated solution enables a detailed statistical analysis of manufactured part quality and provides the data necessary for statistical process control. Expectations will be set for the accuracy for both ply boundary and lap/gap measurements. The time and resource cost of development and integration will also be discussed.
2017-09-19
Journal Article
2017-01-2154
Alan Hiken
A review of critical technologies and manufacturing advances that have enabled the evolution of the composite fuselage is described. The author’s perspective on several development, military, and production programs that have influenced and affected the current state of commercial fuselage production is presented. The enabling technologies and current approaches being used for wide body aircraft fuselage fabrication and the potential reasons why are addressed. Some questions about the future of composite fuselage are posed based on the lessons learned from today and yesterday.
2017-09-19
Technical Paper
2017-01-2166
Hendrik Susemihl, Christoph Brillinger, Sven Philipp Stürmer, Stephan Hansen, Christian Boehlmann, Simon Kothe, Jörg Wollnack, Wolfgang Hintze
Internationally growing flight and passenger numbers have led to a joined order backlog of Airbus and Boeing of approx. 12,500 aircrafts. With today’s production rates the delivery of all aircrafts would take 8.5 years. The resulting endeavor for higher productivity requests more flexible manufacturing solutions. A bottleneck in production is the machining of large aircraft components. These components are commonly machined by vast portal machines. Due to time-consuming referencing processes, cost-effectiveness of these high-invest-machines is often non-satisfying. Mobile robots already have proven their advantages for drilling and fastening applications performing short, high-accuracy movements. With mobile robot-based solutions machining processes can be executed simultaneously which increases the productivity significantly. However, machining paths often have the same dimension as the component itself.
2017-09-19
Journal Article
2017-01-2165
Christian Moeller, Hans Christian Schmidt, Philip Koch, Christian Boehlmann, Simon Kothe, Jörg Wollnack, Wolfgang Hintze
The high demand of efficient large scale machining operations by concurrently decreasing operating time and costs has led to an increasing usage of industrial robots in contrast to large scaled machining centers. The main disadvantage of industrial robots used for machining processes is their poor absolute accuracy, caused by the serial construction, resilience of gearings and sensitivity for temperature changes. Additionally high process forces that occur during machining of CFRP structures in aerospace industry lead to significant path errors due to low structural stiffness of the robot kinematic. These errors cannot be detected by means of motor encoders. That is why calibration processes and internal control laws have no effect on errors caused by elastic deformation. In this research paper an approach for increasing the absolute accuracy of an industrial milling robot with help of a laser tracker system during machining tasks will be presented.
2017-09-17
Technical Paper
2017-01-2507
Matthias Hoch, Michal Kaczmarek, Markus Ahr
Abstract The demand for zinc-nickel coatings continuously increases in the automotive industry due to their high corrosion protection as well as superior wear and heat resistance compared to pure zinc platings. The state-of-the-art plating systems in the brake caliper industry are acid zinc-nickel electrolytes, as only they allow for direct plating on cast iron. Cast iron is the most common base material for the production of automotive brake components due to excellent mechanical and thermal properties. Well suited coatings will preserve the functional properties and provide additional advantages like improved corrosion protection and homogeneous and long lasting appearance. Consistently increasing quality demands, extended warranty periods and cost pressure lead to further developments and force the industry to look for new solutions.
2017-09-17
Technical Paper
2017-01-2504
Scott Lambert
Abstract As the brake industry moves completely into globalization, a standardized method to define and validate the dimensions of backing plates, in a way that is both clear and feasible, is of critical importance for manufacturers at all tiers. The plate drawing not only defines the component as it fits into a brake assembly; it is also what the plate supplier relies on to define the plate for manufacture. If a drawing does not define every dimensional aspect of the product with perfect clarity, in ways that are easily measured, loss of time and resources will result from questions and/or mistakes. This paper proposes an SAE standard for defining the dimensional requirements of backing plates on the drawings themselves, and defining the measuring procedures used to validate those dimensions.
2017-08-25
Technical Paper
2017-01-5007
Jinlun Wang, Zhengwei Ma
Flanging U-shaped piece is a typical auto-body parts, such as tailor-welded front rail inner panel, whereas, large springback amount is a critical challenge in sheet metal forming process, which size and shape accuracy affect the quality of the following assembly process. Firstly, a new form of variable blank holder force (BHF) was proposed in this paper, the springback problem was analyzed by numerical method based on the constant BHF of 90 t, and the contours of von-Mises stress and springback amount were calculated by the dieless method. Secondly, variable BHF with changes in position and punch stroke was designed and used to control springback. Finally, orthogonal experimental and range analysis method were used to optimize the variable BHF parameters. The orthogonal experiment with 5 factors and 4 levels was designed with the initial BHF, the change moment of BHF and the final BHF as variables.
2017-08-22
Article
Digital data is expanding to include equipment on the factory floor, making it possible for designers and manufacturers alike to model and simulate nearly everything before vehicles and their production lines exist in the real world.
CURRENT
2017-08-22
Standard
AMS6424G
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
CURRENT
2017-08-22
Standard
AMS6280M
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.
CURRENT
2017-08-22
Standard
J1915_201708
This SAE Recommended Practice is prepared as a guideline to improve and maintain the quality of remanufactured automotive products. Installation of remanufactured or rebuilt products is often an economical way to repair a vehicle even though they may not fully be equivalent to original equipment parts. Before processing any part, a remanufacturer should determine if the original design and present condition of the core are suitable for remanufacturing, so as to provide durable operation of the part as well as acceptable performance when installed in a vehicle. The remanufacturer should also carefully consider the safety aspects of the product and any recommendations of the original manufacturer related to remanufacturing or rebuilding their product.
2017-08-22
WIP Standard
AMS2762C
This specification covers the procedure for carburizing and related heat treatments of carbon and low-alloy steel parts to produce case hardening and specified mechanical properties within the capability of each respective steel.
CURRENT
2017-08-22
Standard
AMS4275E
This specification covers an aluminum alloy in the form of permanent mold castings.
2017-08-21
Article
Additive manufacturing (AM) is seemingly the cure-all for the manufacture of complex products, but as the potential for AM continues to increase, so too does the cyber target on its back.
2017-08-21
WIP Standard
AMS2690D
This specification defines the equipment, procedures, and requirements for joining leads by parallel gap resistance welding. For attaching leads by parallel gap resistance welding in the assembly of microelectronic circuitry to thin film substrates.
2017-08-21
WIP Standard
AMS2685F
This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.
2017-08-21
WIP Standard
AMS3079C
Protection of metal parts where a soft, readily-removable film is desired and additional protective packaging is provided.
2017-08-21
WIP Standard
AMSM45202B
This specification covers the requirements for equipment, materials and procedures to be used in anodic treatments for magnesium base alloys for the purpose of increasing their corrosion resistance or producing surfaces suitable for the application of a protective organic finish.
2017-08-21
WIP Standard
ARP4252B
This Aerospace Recommended Practice is intended as a guide toward standard practices for the determination of surface cleanliness that are applicable to field operation. Some of these methods can also be used to determine quality assurance that a surface has been properly prepared and maintained. The instrumental methods are: Wettabaility, Surface Potential Difference (SPD), Ellipsometry, and Optically Stimulated Electron Emission (OSEE). Each instrument is described with respect to measurement techniques, limitations, and advantages and types of available instruments. Elementary theoretical prinicples and examples of the use of each instrument are also given.
2017-08-21
WIP Standard
ARP1575C
This document describes a hand-applied, nontank, phosphoric acid anodizing process for surface preparation of aluminum alloys required to achieve optimum bondline durability for structural adhesive bonding.
2017-08-21
WIP Standard
AMSM7866B
This specification covers the requirements for procurement of one grade of powdered molybendum disulfide to be used in lubricants and greases for surfaces where boundary conditions exist.
2017-08-18
WIP Standard
AMS2510F
This specification covers the engineering requirements for finishng aircraft parts and assemblies with an engine gray enamel.
2017-08-18
WIP Standard
AMS2550F
This specification covers the enginering requirements for a treatment to provide enhanced corrosion resistance to sheet metal parts, such as brackets, spacers, and washers, fabricated from martensitic corrosion-resistant steels, usually AMS 5504 or AMS 5508 and having hardness not higher than 40 HRC, or ferritic corrosion-resistant steels, usually AMS 5506. The treatment is not recommended for use on parts subject to impact in service.
2017-08-18
WIP Standard
ARP6903A
The intent of this ARP is to provide guidance to assist users in choosing compatible component finishes/platings to achieve the best corrosion resistance performance for compatible components/couples. This SAE Recommended Practice is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. A galvanic compatibililty table is provided to assist with the compatible plating/finish selection. Specific plating performance parameters for each individual plating and each connector/accessory specification have also been provided to assist the product user with compatible plating/finish selection.
2017-08-18
WIP Standard
AMS2804D
This specification covers requirements for identification of castings.
2017-08-18
WIP Standard
AMS2435H
This specification covers the engineering requirements for applying tungsten carbide/cobalt coatings to metal parts by the detonation process and the properties of such coatings. This coating has been used typically to provide a hard, wear resistant surface on metal parts which do not operate in service higher than 1000 degrees F (538 degrees C) but usage is not limited to such applications. These coatings are not recommended for surfaces with deep vee-shaped grooves, blind cavities, narrow holes or sharp corners, or where deformation of the base metal may be expected. Higher cobalt content provides increased ductility for applications where impact or fretting wear is involved.
2017-08-18
WIP Standard
AMS2474E
This specification establishes the engineering requirements for producing chemical-film coatings on aluminum and aluminum alloys and the properties of such coatings. Primarily for aluminum and aluminum alloys where increased corrosion resistance, improved paint adhesion, or a low-electrical resistance coating is required. Also useful for improving the corrosion resistance and paint adhesion properties of abraded or discontinuous anodized surfaces of aluminum and aluminum alloy parts.
CURRENT
2017-08-18
Standard
J443_201708
This SAE Recommended Practice Specification provides the procedures for using test strips per SAE J442 for peening processes.
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