Mechanical modelling of micro-scale abrasion in superfinish belt grinding
Mechanical modelling of micro-scale abrasion in superfinish belt grinding
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DOI：
10.1016/j.triboint.2008.03.015
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发表时间：
2008-11-01
影响因子：
6.2
通讯作者：
El Mansori, Mohamed
中科院分区：
文献类型：
--
作者：
Bigerelle, Maxence;Hagege, Benjamin;El Mansori, Mohamed
在同步传动中，变速杆力和相应的可换档性是最重要的设计考虑因素。本文介绍了一种按精加工规范对同步功能面（惰轮锥面）进行严格建模的工程尝试。虚拟输入曲面由原始分形函数生成，该函数再现了砂轮磨削过程产生的表面“特征”。为了模拟以软涂层带为工具的皮带精加工过程的后续超精加工操作，专门开发了一种模拟磨料抛光条件的算法，并将其应用于初始分形曲面的再加工。该模型的基本思想是，轮廓峰的高度越高，在磨损循环中其阻力的可能性越低。因此，皮带精加工过程由五个参数建模：两个表征初始表面的参数（分形维数和范围振幅）和三个描述磨损抛光过程的参数（阻力概率、磨损体积和磨损循环次数）。为了确定部件将按照要求的规格制造，必须确定模型的参数。为此，创建了一个具有优化方案的函数模型。该模拟提供了初始表面的形态以及如何处理超精加工以获得表面的功能。需要一个较高的初始粗糙度，从这个初始粗糙度开始进行缓慢的侵蚀，以侵蚀峰并保留初始轮廓（润滑剂罐）的一些谷。最后，研究表明，汽车设计人员施加由带磨削工艺获得的形态规范，以防止电机部件的磨损。(C) 2008 Elsevier Ltd版权所有。
In synchronized transmission, the shift lever force and corresponding shiftability are the most important design considerations. The present paper introduces an engineering attempt to rigorously model a synchronizing functional surface (cone surface of idler gear) according to its finish specifications. The virtual input surface is generated by an original fractal function, which reproduces the surface "signature" due to the wheel grinding process. To model the subsequent superfinishing operation by belt finishing process, which uses a soft-coated belt as a tool, an algorithm simulating the abrasive polishing conditions is especially developed and applied to rework the initial fractal surface. The basic idea of this model is that the higher the height of a peak of the profile, the lower its probability of resistance during an abrasion cycle. The belt finishing process is hence modeled by five parameters: two parameters that characterize the initial surface (fractal dimension and range amplitude) and three parameters describing the abrasion polishing process (probability of resistance, wear volume and the number of abrasion cycles). In order to ascertain that the component will be manufactured to the required specifications, the model's parameters have to be determined. For this goal, a functional model with an optimization scheme is created. This simulation provides the morphology of the initial surface and how to cope with the superfinishing process to obtain the functionality of the surface. An elevated initial roughness is required from which slow erosion is proceeded to erode peaks and conserve some valleys of the initial profile (lubricant tanks). Finally, it is shown that automotive designers impose morphological specifications obtained by the belt grinding process to prevent scuffing of the motor parts. (C) 2008 Elsevier Ltd. All rights reserved.