Evaluation of thermal damages and residual stresses in dry grinding by structured wheels
Evaluation of thermal damages and residual stresses in dry grinding by structured wheels
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DOI：
10.1016/j.jclepro.2016.11.091
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发表时间：
2017-01-20
影响因子：
11.1
通讯作者：
Lee, Dal Ho
中科院分区：
文献类型：
--
作者：
Azarhoushang, Bahman;Daneshi, Amir;Lee, Dal Ho
由于对环境友好加工工艺的需求，干磨削最近成为一个特别感兴趣的主题。尽管干磨工艺具有生态和经济优势，但尚未被广泛引入工业环境。其主要原因是磨削过程中接触区的高发热和高能量分配传递给工件。为了解决这个问题，一个新的和有前途的概念，使用结构化砂轮已经开发出来。通过60%的砂轮结构化，在干燥条件下实现了50%的磨削力降低和40%以上的工件温度降低。较低的热通量和较低的比能也显著减少了对工件的热损伤。这些效果是由于砂轮的结构化降低了静态和动态磨粒的数量，因此，最大切屑厚度增加。增加的切屑厚度导致降低的比磨削能。尽管结构化砂轮实现了优点，但结构化砂轮的较高磨损是与砂轮的结构化相关联的缺点。(C)2016爱思唯尔有限公司版权所有
Due to the demand for environmental friendly machining process, the dry grinding has lately become a subject of special interests. Despite its ecological and economic advantages, dry grinding process has not been widely introduced into industrial environment. The main reason is the high heat generation in the grinding contact zone and high energy partition transferred to the workpiece in the process. In order to solve this problem, a novel and promising concept using the structured grinding wheels has been developed. With 60% structuring of a grinding wheel, 50% reduction in grinding forces and over 40% reduction in the workpiece temperature were achieved in dry condition. The lower heat flux and lower specific energy led to a significant reduction in thermal damages to the workpiece, as well. The effects are contributed to the fact that structuring the grinding wheels lowers the number of static and dynamic grains and therefore, the maximum chip thickness increases. The increased chip thickness results in reduced specific grinding energy. Despite the advantages achieved with structured wheels, a higher wear of the structured wheels is a disadvantage associated with the structuring of grinding wheels. (C) 2016 Elsevier Ltd. All rights reserved.