摘要 :
The Advanced Engineering Environment (AEE) is a concurrent engineering concept that enables real-time process tooling design and analysis, collaborative process flow development, automated document creation, and full process trace...
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The Advanced Engineering Environment (AEE) is a concurrent engineering concept that enables real-time process tooling design and analysis, collaborative process flow development, automated document creation, and full process traceability throughout a products life cycle. The AEE will enable NNSAs Design and Production Agencies to collaborate through a singular integrated process. Sandia National Laboratories and Parametric Technology Corporation (PTC) are working together on a prototype AEE pilot project to evaluate PTCs product collaboration tools relative to the needs of the NWC. The primary deliverable for the project is a set of validated criteria for defining a complete commercial off-the-shelf (COTS) solution to deploy the AEE across the NWC.
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Ionic nitriding was studied. The diffusion layers were quantitatively and microstructurally analyzed. The fundamental mechanisms which govern the in situ transformation of sulfur carbides into nitrides and lead to the precipitatio...
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Ionic nitriding was studied. The diffusion layers were quantitatively and microstructurally analyzed. The fundamental mechanisms which govern the in situ transformation of sulfur carbides into nitrides and lead to the precipitation of cementite lattices are defined. Optimization of the treatment parameters allows for the realization of single-phase layers on Z 155 CDV 12 steel. This phase transformation conditions the mechanical resistance of the nitrided layers. Wear test results indicate that for tool steels, the choice of nitriding treatment must be specific to the intended application.
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The report contains information on Romanian Trading Companies and distributors ofmachine tools, address of Romanian Department of Machine Building Industry, names and addresses of machine tool manufacturers, and type of equipment.
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An examination of the report 'An Investigation to Determine the Single Point Cutting Tool Angles Which Yield Maximum Tool Life by Response Surface Methodology and Evolutionary Operation of Processes,' necessitated determining the ...
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An examination of the report 'An Investigation to Determine the Single Point Cutting Tool Angles Which Yield Maximum Tool Life by Response Surface Methodology and Evolutionary Operation of Processes,' necessitated determining the optimum tool geometry which could be used to grind back and side rake tool angles for high speed steel tools. Machining tests and analysis were done on 1018 and 4330 steels.
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The Federal Aviation Administration developed a Risk Assessment Tool (RAT) for the Electrical Wiring Interconnection System (EWIS). This report documents further developments of that RAT. The developments include the results of a ...
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The Federal Aviation Administration developed a Risk Assessment Tool (RAT) for the Electrical Wiring Interconnection System (EWIS). This report documents further developments of that RAT. The developments include the results of a paired comparison workshop in which expert judgment was elicited on the effects of wire environment on wire failure rate. This data was used to develop a multivariate function that when it is scaled using historical failure data from the emergency path lighting system, the function estimates the failure probabilities of wires for most of the environmental and physical conditions found on aircraft. A damage potential analysis was expanded to include a model of damage to structure that depends on the power, energy, and heat dissipation of an electrical arc. An agreement between the developed model and damage data was acceptable. However, potential improvements to the model have been identified. Methodologies and software tools have been developed to improve the accuracy and efficiency of importing the required aircraft EWIS data into the tools model database. Using these tools, 7783 wires, 1774 bundle sections, and 579 connectors were modeled and imported into the database. Finally, a prototype report was generated to improve consistency between the reports generated by the EWIS RAT and Aircraft Certification Office expectations. These improvements have been integrated into the EWIS RAT.
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A pneumatic drill motor was rigidly attached to the tool flange of a six-axis robot for deburring studies. Attempts to deburr various details including straight edges, contours, and holes with this robot have produced inconsistent...
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A pneumatic drill motor was rigidly attached to the tool flange of a six-axis robot for deburring studies. Attempts to deburr various details including straight edges, contours, and holes with this robot have produced inconsistent edge breaks on aluminum and stainless steel parts because of noncompliance. Much of the problem lies in the variation of feature location on the parts. Properly oriented tooling compliance is essential for effective deburring and chamfering and should compensate for the detail variation in machined and cast parts. (ERA citation 10:014026)
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