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一种缸体金属颗粒度优化方法研究
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作者 曾维康 裴伟 +1 位作者 蓝勇欣 赖智宇 《汽车与驾驶维修》 2024年第11期37-41,共5页
本文主要研究铸铁缸体在机械加工过程中产生铁屑及各相交面、交叉孔产生的毛刺翻边状态,将其与对应刀具及工艺进行关联性分析,形成经验数据库。经过相关的分析,提出一种降低金属颗粒去除难度的加工工艺方案,并提出与之对应的专用刀具设... 本文主要研究铸铁缸体在机械加工过程中产生铁屑及各相交面、交叉孔产生的毛刺翻边状态,将其与对应刀具及工艺进行关联性分析,形成经验数据库。经过相关的分析,提出一种降低金属颗粒去除难度的加工工艺方案,并提出与之对应的专用刀具设计,在生产过程中进行充分验证,结果效果明显。相关的措施降低金属颗粒去除、清洁的难度,能够在整机下线时较好控制金属颗粒度符合产品要求,提高生产效率。通过针对性研究,形成问题解决经验,给行业内相关问题攻关解决提供有效借鉴。 展开更多
关键词 铸铁缸体 油道 交叉孔 相交面 金属颗粒度
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The Assessment of Air Pollution during 2013 and 2014 in Tokat Province
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作者 Omer Isildak 《Journal of Food Science and Engineering》 2017年第4期209-212,共4页
This study aimed to determine the amount of total polluting matter emitted into the atmosphere from heating and industrial-based emissions and the total pollution bulk of Tokat city center. The annual cycles of some h... This study aimed to determine the amount of total polluting matter emitted into the atmosphere from heating and industrial-based emissions and the total pollution bulk of Tokat city center. The annual cycles of some heavy metal in particulate matters have been investigated at this area in order to elucidate temporal variations as well as major sources processes responsible for their formation. Air particulate samples were collected from three different locations situated around Tokat. These samples were determined for heavy metals by using Flame or graphite-furnace Atomic absorption spectroscopy. Particulate matter concentrations up to 52.43μg/m^3 were observed in sampling area. The initial results of the chemical analysis showed that concentration values of heavy metals in air particles observed were higher than the World Health Organization (WHO) guideline limit values. 展开更多
关键词 Air pollution particle matter PM10 and PM2.5
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