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Viewing 211 to 240 of 21435
2017-07-10
Technical Paper
2017-28-1983
J Ronald Aseer, P Baskara Sethupathi, J. Chandradass, Renold Elsen
Abstract The utilization of unconventional machining methods such as electron beam machining, electrical discharge machinating, etc., have been increased in the manufacturing industry to create holes on the materials. In this paper, twist drill was used for drilling of Bahunia racemosa (BR)/ glass fiber composites and then the measurement of hole diameter error was analysed. The main objective was to establish a correlation between feed rate, cutting speed and drill tool with the induced hole diameter error in a composites. The drilling process was performed under various cutting speed, feed rates and different drilling tools with a point angle of 118°. A Coordinate measuring machine was used to examine the hole diameter error of drilling hole. Taguchi L9 (33) orthogonal array was used to determine the optimum levels of the parameters and analyze the effect of drilling parameters on hole diameter error.
2017-07-10
Technical Paper
2017-28-1987
Vigneshwaran K, Palanivendhan Murugadoss, K Gokul
Abstract The main objective is to Extraction of cellulose fibers using mechanical ball milling process and chemical treatment methods. The fibers are incorporated with an epoxy matrix to make composite plates. Mechanical properties such as tensile strength, flexural strength, and impact energy are evaluated. Ball milling is the mechanical extraction method of producing nano size powder. The increase in milling process results in the chance of occurring nanofibers. The ball milling process is carried out without any chemical treatment process. In chemical treatment methods, three different kinds of treatment are performed namely sodium hypochlorite, sulphuric acid and acetic acid. Using hand layup methods these fibers are incorporated into the epoxy matrix to fabricate composite plates. In my study nanosized fiber is not obtained, only 28 micron fibers are converted into 3-4 microns.
2017-07-10
Technical Paper
2017-28-1977
M Malathi, J Herbert Mabel, R. Rajendran, N Gowrishankar
Abstract Piston rings are used to seal the cavity formed between the piston and the cylinder in order to allow the engine to operate efficiently. The piston rings wear out due to constant rubbing action with cylinder wall and also have to withstand high temperature. This has lead to the development of new piston ring coatings with good wear properties under increasingly challenging running conditions. To improve the wear resistance of the piston rings several coating techniques are employed. One such technique is Ni-P composite coating which is widely used in the automotive industry. Reinforcement of ceramic particles enhances the tribological and mechanical properties of the coating. The base material of the piston ring used in this study is hardened carbon steel. The main objective is to develop an optimum Ni-P composite coating on piston ring to improve wear and friction resistance.
CURRENT
2017-07-10
Standard
AMS2375E
This specification covers procedures for obtaining first article (preproduction) approval of forgings and the controls to be exercised in producing subsequent production forgings.
CURRENT
2017-07-07
Standard
AMS7510/1C
This specification covers one type of samarium-cobalt permanent magnet.
CURRENT
2017-07-07
Standard
AMS4031J
This specification covers an aluminum alloy in the form of sheet and plate 0.020 to 2.000 inches (0.51 to 50.80 mm), inclusive, in nominal thickness, supplied in the annealed (O) condition (see 8.4). When specified, product shall be supplied in the “as fabricated” (F) temper.
CURRENT
2017-07-07
Standard
AS85848/2A
SCOPE IS UNAVAILABLE.
CURRENT
2017-07-06
Standard
AS85848A
This specification establishes the requirements for various types of identification sleeving that will shrink to a predetermined size upon the application of heat after it has been marked. Continuous operating temperature ratings range from -55° to 175°C (-67° to 347°F). (See 6.1).
2017-07-04
WIP Standard
AMS5122K
This specification covers a carbon steel in the form of strip.

This material hs been used typically for washers and other stamped parts requiring a smooth finish and only slight or no forming, but usage is not limited to such applications.

2017-07-03
Article
Tesla pegs July 28 for the first customer deliveries of its heavily-anticipated $35,000 Model 3 compact sedan.
2017-07-03
WIP Standard
AMS5031G
This specification covers a low-carbon steel in the form of covered welding electrodes.
2017-06-30
WIP Standard
AMSS6758B
This specification covers chrome-molybdenum (4130) steel bars and forging stock of aircraft quality.
CURRENT
2017-06-29
Standard
AMS4365
This specification covers an aluminum alloy in the form of plate from 3.000 to 8.000 inches (76.20 to 203.20 mm) in thickness (see 8.4).
CURRENT
2017-06-29
Standard
AMS7875F
This specification covers a blend of chromium carbide and a nickel-chromium alloy in the form of powder.
2017-06-29
WIP Standard
AMS2770P

This specification specifies the engineering requirements for heat treatment, by part fabricators (users) or their vendors or subcontractors, of parts (see 8.8.1). It also covers heat treatment by warehouses or distributors converting raw material from one temper to another temper (see 1.3 and 8.5). It covers the following aluminum alloys:

1100, 2004, 2014, 2017, 2024, 2098, 2117, 2124, 2219, 2224, 3003, 5052, 6013, 6061, 6063, 6066, 6951, 7049, 7050, 7075, 7149, 7178, 7249, 7475

CURRENT
2017-06-28
Standard
AMS4915M
This specification covers a titanium alloy in the form of sheet, strip, and plate up to 4.000 inches (101.60 mm), inclusive.
CURRENT
2017-06-28
Standard
AMS4375M
This specification covers a magnesium alloy in the form of sheet and plate from 0.016 to 3.000 inches (0.41 to 76.20 mm), inclusive, in thickness (see 8.4).
2017-06-28
Journal Article
2017-01-9180
Johannes Wurm, Eetu Hurtig, Esa Väisänen, Joonas Mähönen, Christoph Hochenauer
Abstract The presented paper focuses on the computation of heat transfer related to continuously variable transmissions (CVTs). High temperatures are critical for the highly loaded rubber belts and reduce their lifetime significantly. Hence, a sufficient cooling system is inevitable. A numerical tool which is capable of predicting surface heat transfer and maximum temperatures is of high importance for concept design studies. Computational Fluid Dynamics (CFD) is a suitable method to carry out this task. In this work, a time efficient and accurate simulation strategy is developed to model the complexity of a CVT. The validity of the technique used is underlined by field measurements. Tests have been carried out on a snowmobile CVT, where component temperatures, air temperatures in the CVT vicinity and engine data have been monitored. A corresponding CAD model has been created and the boundary conditions were set according to the testing conditions.
2017-06-27
Article
Agile1500 Automated Guided Vehicle (AGV) platform from Comau features the flexibility to be deployed across a wide range of manufacturing and non-manufacturing scenarios.
2017-06-26
Solution Notes
SN-0001
Automating a manufacturing process often comes with substantial investment or sustained operational costs of complex subsystems. But, by reducing complexity and using technologically mature components, it is possible to develop viable scaled and robust automated solutions. For the past several years, aerospace manufacturers have endeavored to automate manufacturing processes as much as possible for both production efficiencies and competitive advantage. Automating processes like drilling, fastening, sealing, painting, and composite material production have reaped a wide range of benefits; from improving quality and productivity to lowering worker ergonomic risks. The results have improved supply chains from small component manufacturers all the way up to airframe assemblers. That said, automation can be very expensive, and difficult to introduce when a product is anywhere beyond the beginning of its life cycle.
CURRENT
2017-06-26
Standard
AMS4917J
This specification covers a titanium alloy in the form of sheet, strip, and plate through 4.000 inches (101.6 mm) nominal thickness.
2017-06-26
Solution Notes
SN-0002
High-Speed Inspection: Maintain Cycle Time, Ensure Fastener Quality is a Solution Notes covering the possibility to inspect all fasteners without affecting installation times by applying a process to automatically measure fasteners while they move through a feed tube into the installation machine. Solution Notes are short, informative pieces covering dynamic and emerging technologies within the aerospace and automotive industries to keep you up to date on how new, applied technologies are being used within the mobility space.
2017-06-26
White Paper
WP-0001
NASA has embarked on an ambitious program to integrate additive manufacturing techniques and to develop processes for the microgravity environment. The most recent example of this program is the successful launch and deployment of the first 3D printer on the International Space Station. In this one-year effort, students were required to meet a series of milestones to design, manufacture, and test their ideas in close cooperation with members of the NASA Exploration Augmentation Module (EAM) concept team.The participants in this project were tasked with thinking of new solutions using AM that would simultaneously be recyclable with minimal loss in mechanical properties but also have the capacity for high mechanical properties. Working in interdisciplinary teams, the participant teams investigated the use of recycled materials, characterization, testing, modeling, and tool development.
2017-06-23
WIP Standard
D17AB
This revises the Identification section of the General Agreement on Marking.
CURRENT
2017-06-22
Standard
AS6414A
This specification is applicable to the processes that are used in the manufacture of aerospace elastomer parts utilizing materials conforming to AMS7XXX series specifications, user specifications, or print on a Purchase Order (PO) that calls out this document for aerospace applications. The elastomer parts are in the form of O-rings, plate seals and other compression seals.
2017-06-22
WIP Standard
AMS2451/3C
This specification covers the requirements for brush plating of low-hardness, low-stress nickel by electrodeposition.
CURRENT
2017-06-22
Standard
AMS6512H
This specification covers a premium aircraft-quality, maraging alloy steel in the form of bars, forgings, mechanical tubing, flash welded rings up through 10.000 inches (254.00 mm) inclusive in diameter or least distance between parallel sides and stock for forging or flash welded rings.
2017-06-22
WIP Standard
AMS2451/4D
This specification establishes the requirements for brush plating of cadmium by electrodeposition.
CURRENT
2017-06-22
Standard
AMS5568H
This specification covers a corrosion and heat resistant steel in the form of welded tubing.
CURRENT
2017-06-21
Standard
AMS4443H
This specification covers a magnesium alloy in the form of sand castings.
Viewing 211 to 240 of 21435

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