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Viewing 1 to 30 of 18199
Training / Education
2015-04-20
Preventing future problems and troubleshooting existing problems in today's stamping plants requires greater stamping process knowledge. The link between inputs and outputs isn't as clear as many think, increasing the need for detailed understanding of the variables involved. This course discusses the key inputs and outputs associated with sheet metal stamping, including important elements for controlling the process and making it more robust. The course reviews sheet metal characteristics and their application, especially from a formability standpoint, using many automotive-related examples. Common issues such as springback, dent resistance, and process differences among mild steel, high strength steel, bake hardenable steel, and aluminum are discussed.
Training / Education
2014-12-17
There is a potential for metal fatigue in any situation where a component is subjected to cyclic loads. Fatigue failures of various types are a key concern in increasing the reliability of products. Problems involving fatigue have become more severe with the demand for lighter weight structures and components. The effective use of fatigue analysis and predictive tools is critical for reducing the development time of new products. Two methods of metal fatigue analysis will be covered. The first is the stress-life approach. This method is used for high cycle or very long life fatigue problems where loads have fairly constant amplitude.
Training / Education
2014-12-02
Advanced High Strength Steels (AHSS) are now commonly used in automotive body structural applications. The high strength of this grade classification is attractive to help reduce mass in the automotive body through reduction in thickness. Strength also supports improvements in safety requirements so that mass increases are minimized. In some specific grades of AHSS, energy absorption is possible in addition to the high strength. This course will review the definition and properties of AHSS and cover several common applications in automotive body structures. In addition, key manufacturing areas including stamping and welding will be addressed to demonstrate the increased challenges as compared to lower strength steel grades.
Technical Paper
2014-09-30
Balakrishnan Natesan
Abstract Phosphorous is an important alloying element in powder metallurgy applications. It is used in Powder metal parts for effective Sintering, dimensional stability, improved machinability, corrosion resistance etc. However it does have some negative effects on properties of Powder metal parts. The purpose of the paper is to study the effect of phosphorous on Powder metal gear of Mix A and Mix B having identical composition differing only in phosphorous content. The samples were detailed on each stage, viz. sintering & Heat treatment. In addition two defective samples were studied to observe the extent to which phosphorous may deteriorate the Powder metal Gear.
Technical Paper
2014-09-28
Johannes Schneider
The brake discs and brake drums used on motor vehicles are, in 90% of applications, made from grey cast iron. Although other designs such as composite systems comprising of a grey iron braking band and a light weight mounting bell made from aluminum, Al-MMC or entire ceramic brake discs have been developed, cast iron will continue to play a major role as a work piece material for brakes. Cast iron offers advantages in material characteristics such as good thermal conductivity, high compressive strength and damping capacity. In addition it shows a superior casting behavior and also an unbeatable competitive price per part, when compared to other brake materials or designs. Ongoing research in material and casting science are leading to new types of alloyed CI materials, fulfilling the increasing demands in terms of performance but also increasing the demands for a reliable and economical production. As a product of high volume production the economics and productive manufacturing of the brake discs is a fundamental issue to ensure the competitiveness of the manufacturers.
Technical Paper
2014-09-28
Abdulwahab A. Alnaqi, Suman Shrestha, David C. Barton, Peter C. Brooks
Abstract Aluminium alloys have been used extensively in the automotive industry to reduce the weight of a vehicle and improve fuel consumption which in turn leads to a reduction in engine emissions. The main aim of the current study is to replace the conventional cast iron rotor material with a lightweight alternative such as coated aluminium alloy. The main challenge has been to meet both the cost and functional demands of modern mass-produced automotive braking systems. A sensitivity analysis based on the Taguchi approach was carried out to investigate the effect of various parameters on the thermal performance of a typical candidate disc brake. Wrought aluminium disc brake rotors coated with alumina on the rubbing surfaces were determined to have the best potential for replacing the conventional cast iron rotor at reasonable cost. Optimisation of the structure was subsequently carried out using a genetic algorithm on the selected coated aluminium disc brake rotor. This determines the optimum thickness of the coating and the composition of the substrate based on selected criteria.
Technical Paper
2014-09-28
Tomasz Grabiec
Abstract Wear and friction behavior of disc brakes are important properties of disc brake systems and are mainly addressed by appropriate selection and tuning of friction material. Disc material composition is often considered as “given”. The most common material used for brake discs is grey cast iron which can have carbon content between 2.5 to 4.2 percent. It is difficult to find in literature investigations related to the influence of cast iron material in combination with modern low-met friction material on wear and friction performance of disc brakes. In this work, the author will try to analyze impact of brake disc material properties on wear and friction performance.
Event
2014-09-23
The need for more innovative technologies towards lowering the cost and cycle time for drilling, fastening, and assembly of hybrid metal/composite structures has created a sense of urgency in the airplane manufacturing field. This session covers methods, tools, and technologies to enable manufacturability of hybrid joints while factoring in the most economical methods. Tools and techniques to improve drilling and assembly of the hybrid metal/composite will be addressed.
Event
2014-09-23
Advancements in the production of metallic structure continue to be important to the aerospace and commercial aviation industries. This session features improved materials, processes, and joining methods for metallic components to meet the challenges put forth by demanding end product requirements.
Event
2014-09-23
Advancements in the production of metallic structure continue to be important to the aerospace and commercial aviation industries. This session features improved materials, processes, and joining methods for metallic components to meet the challenges put forth by demanding end product requirements.
Event
2014-09-16
Technical Paper
2014-09-16
Joshua Norman, Cesar Moreno, Zhiyu Wang, James Mann, Christopher Saldana
Abstract The beneficial effects of contact disruption in modulation-assisted machining of aerospace alloys have been well documented, but sources for such improvements are not well understood. This study explores the underlying nature of differences that occur in energy dissipation during conventional and modulation-assisted machining by characterizing the relationship between controllable process parameters and their effects on chip formation. Simultaneous in situ force and tool position measurements are used to show that the forces in modulation-assisted machining can be described by empirical force models in conventional machining conditions. These models are found to accurately describe plastic dissipation over a range of modulation conditions and configurations, including in cases where energy expenditure decreases with the application of modulation. These observations suggest that the underlying response in modulation-assisted machining is analogous to that of conventional machining.
Standard
2014-09-11
This specification covers an aluminum alloy in the form of plate products from 1.000 to 6.000 inches (152.40 mm) in thickness. 7065-T7451 may be used in aerospace applications requiring high strength and fracture toughness, high resistance to stress-corrosion cracking and good resistance to exfoliation corrosion, but usage is not limited to such applications.
Standard
2014-09-11
This specification covers an aluminum alloy in the form of plate products from from 1.000 to 6.000 inches (152.40 mm) in thickness. 7065-T7651 may be used in aerospace applications requiring high strength and good fracture toughness, good resistance to stress-corrosion cracking and to exfoliation corrosion, but usage is not limited to such applications.
WIP Standard
2014-09-09
This SAE Standard covers the dimensional and general specifications, including performance requirements, for carbon steel self-drilling tapping screws suitable for use in general applications. It is the objective of this document to insure that carbon steel self-drilling tapping screws, by meeting the mechanical and performance requirements specified, shall drill a hole and form or cut mating threads in materials into which they are driven without deforming their own thread and without breaking during assembly. Appendix A is included to provide a recommended technique for measuring the case depth on the screws.
WIP Standard
2014-09-09
This Aerospace Recommended Practice (ARP) clarifies terms used in Aerospace materials and process specifications. The terms clarified in this ARP are not intended to supersede those terms for which clarification is already provided in existing specifications.
Standard
2014-09-05
Scope is unavailable.
Standard
2014-09-05
Scope is unavailable.
Standard
2014-09-05
Scope is unavailable.
WIP Standard
2014-09-03
This appendix establishes the procedures, guidelines and requirements for qualification and quenching of parts produced from the alloys listed in AMS2759/2, Table 2 using inert pressure gas in vacuum furnaces.
Standard
2014-08-29
This specification covers an aircraft quality, low alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. These products have been used typically for parts requiring a combination of high tensile strength and good ductility with relatively high impact strength and hardness, but usage is not limited to such applications. Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment. ARP1110 recommends practices to minimize such conditions.
Standard
2014-08-25
This specification covers a free-machining, low-alloy steel in the form of round bars 3.50 inches (88.9 mm) and under in nominal diameter.
Standard
2014-08-22
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
Standard
2014-08-22
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.
Viewing 1 to 30 of 18199

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