Part Generation by Layerwise Selective Sintering
{'Code': '07030000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CMMI', 'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'Bruce Kramer', 'PO_EMAI': 'bkramer@nsf.gov', 'PO_PHON': '7032925348'}
This proposal will investigate a new manufacturing process which           builds up parts in layers from a powder by selectively sintering each layer     with a laser.  The objective of the process is to automatically produce         three-dimensional parts of general shape directly from a CAD database           without part-specific tooling or human intervention.  Each layer that is        built up corresponds to a cross-section of the part.  Powder is deposited       into a box in thin layers; after each layer is deposited, the surface of        the powder is raster-scanned with a high-power laser beam.  The intensity       of the laser beam is modulated so that the powder is sintered or fused in       the areas that are to be occupied by the part at that particular                cross-section.  In those areas not sintered, the powder remains loose.          Another layer of powder is then deposited and raster-scanned.  The process      is repeated until the entire part is produced.                                       The methodology to be used is an experimental/empirical approach used      in conjunction with computer modeling and analysis.  The objectives of the      proposed research are to formulate a process model and rules for selection      of powders and process parameters, and to explore post-treatments.              Preliminary work has been conducted with plastic powder; the proposed work      is needed to demonstrate feasibility with common engineering materials.              The proposed process which produces a three-dimensional part by the        combination of a raster scan and selective sintering from a CAD database        without part specific tooling or human intervention appears to be novel.        This process should facilitate the quick production of prototype parts          which should reduce product development time.
[{'FirstName': 'Alfred', 'LastName': 'Traver', 'PI_MID_INIT': 'E', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Alfred E Traver', 'EmailAddress': None, 'NSF_ID': '000120167', 'StartDate': '03/15/1987', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Joseph', 'LastName': 'Beaman', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Joseph J Beaman', 'EmailAddress': 'jbeaman@mail.utexas.edu', 'NSF_ID': '000299260', 'StartDate': '03/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
{'Name': 'University of Texas at Austin', 'CityName': 'AUSTIN', 'ZipCode': '787121139', 'PhoneNumber': '5124716424', 'StreetAddress': '110 INNER CAMPUS DR', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Texas', 'StateCode': 'TX', 'CONGRESSDISTRICT': '25', 'CONGRESS_DISTRICT_ORG': 'TX25', 'ORG_UEI_NUM': 'V6AFQPN18437', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF TEXAS AT AUSTIN', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '146700', 'Text': 'MATERIALS PROCESSING AND MANFG'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8707871.xml'}