A Predictive Model for Surface Temperatures During Grinding

磨削过程中表面温度的预测模型

• 批准号: 9500133
• 负责人: Andras Szeri
• 金额: $ 29.17万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9500133&HistoricalAwards=false
• 关键词: Predictive; Model; Surface; Temperatures; During

9500133 Szeri Grinding is used on a significant percentage of precision products made in the US, and is the preferred machining technique for ceramics and composites. High temperatures on the surface of the grits and the materials being ground can lead to thermal damage or dimensional changes in precision components, premature wear of abrasives. This project's goal is to predict the temperature field that a workpiece surface experiences when it is ground with a coolant emulsion. The technical approach is to model the flow and heat transfer that occurs at the grinding interface between the abrasive wheel and workpiece by treating oil-in-water coolants as a homogeneous mixture. Because this is a difficult modeling problem, a experimental program to verify the model predictions using an existing experimental rig. The research will be a collaborative effort involving the University of Delaware, the University of Pittsburgh, NIST, Eaton Corp.'s Research Center and Norton Co. The application and impact of these results are: prevention of thermal damage that can lead to premature failure of precision parts, higher productivity due to better control of the wear of expensive abrasives, and shorter lead times in setting up new abrasive processes. An analytical model may also be a way of assessing if it is possible to eliminate a fluid, thereby eliminating the environmental cost of disposal. ***

小行星9500133 磨削加工在美国制造的精密产品中占很大比例，是陶瓷和复合材料的首选加工技术。 磨粒和被研磨材料表面的高温会导致精密部件的热损伤或尺寸变化，磨料的过早磨损。 该项目的目标是预测工件表面在冷却剂乳化液中研磨时的温度场。 技术方法是通过将水包油冷却剂作为均匀混合物处理来模拟在砂轮和工件之间的磨削界面处发生的流动和热传递。 由于这是一个困难的建模问题，实验方案，以验证模型预测使用现有的实验装置。 这项研究将是一项合作努力，涉及特拉华州，匹兹堡大学，NIST，伊顿公司。的研究中心和诺顿公司。 这些结果的应用和影响包括：防止可能导致精密零件过早失效的热损伤，更好地控制昂贵磨料的磨损，从而提高生产率，以及缩短建立新磨料工艺的交货时间。 分析模型也可以是评估是否可以消除流体的一种方式，从而消除处置的环境成本。 ***