Bizikletako aurreko abatzaren mekanizaziorako cam bidezko programazioa

[EU]Lan honek bizikletako aurreko gurpileko abatz baten CAM edo CNC programazioa egitean datza, honen bidez erremintaren ibilbidea deskribatuz piezaren CAD eredutik abiatuz. Hasteko, zenbakizko kontrolak izan duen eboluzioa eta garrantzia azaltzen da. Ondoren, abatzaren funtzionamenduaren deskribapena egin da, bere osagaiak eta izan behar dituen ezaugarriak aztertuz. Gainera, fabrikazio prozesu ezberdinen analisia egin da, bakoitzaren abantaila eta desabantailak azpimarratuz. Azkenik, zenbakizko kontrolaren inguruan bereganatutako ezagutzak aplikatu dira CAM programa batean abatz baten mekanizazioa programatuz. Honez gain, erabilitako CAM programaren erabilera azaltzen da.

Estimating indoor air quality using integrated 3D CAD building models

The indoor air quality (IAQ) in buildings is currently assessed by measurement of pollutants during building operation for comparison with air quality standards. Current practice at the design stage tries to minimise potential indoor air quality impacts of new building materials and contents by selecting low-emission materials. However low-emission materials are not always available, and even when used the aggregated pollutant concentrations from such materials are generally overlooked. This paper presents an innovative tool for estimating indoor air pollutant concentrations at the design stage, based on emissions over time from large area building materials, furniture and office equipment. The estimator considers volatile organic compounds, formaldehyde and airborne particles from indoor materials and office equipment and the contribution of outdoor urban air pollutants affected by urban location and ventilation system filtration. The estimated pollutants are for a single, fully mixed and ventilated zone in an office building with acceptable levels derived from Australian and international health-based standards. The model acquires its dimensional data for the indoor spaces from a 3D CAD model via IFC files and the emission data from a building products/contents emissions database. This paper describes the underlying approach to estimating indoor air quality and discusses the benefits of such an approach for designers and the occupants of buildings.