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首页> 外文会议>International Conference on Surface Finishing Technology and Surface Engineering(ICSFT2006); 20060925-27; Dalian(CN) >Rounding Process of Workpiece in Through-Feed Centerless Grinding with Large Grinding Allowance
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Rounding Process of Workpiece in Through-Feed Centerless Grinding with Large Grinding Allowance

机译：大进给量直进式无心磨削中工件的倒圆加工

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摘要

This paper deals with the computer simulation and experimental investigation of the workpiece rounding process in through-feed centerless grinding with large grinding allowance. In a through-feed centerless grinding operation, when the grinding allowance is extremely large compared with common occasions, the geometrical support conditions for workpiece such as center height will change significantly during grinding. This results in the complication of the workpiece rounding process and embarrasses the operator setting-up the optimum conditions. In order to assist the operator in setting-up the conditions efficiently, the proposal of a way to predict the final profile of workpiece and its roundness is meaningful. For this purpose, a computer simulation method is proposed and actual experiments ware conducted to verify the method. The obtained results showed that (1) The center height of workpiece decreases linearly with grinding time, leading to the linear reduction in workpiece diameter during grinding operation with a larger grinding allowance; (2) The grinding allowance depends on the tilt angle of blade top face, meaning the grinding allowance can be determined by using a blade with the appropriate tilt of top face; (3) During grinding, larger irregularities on workpiece circumference become smaller along with the occurrence of small irregularities, resulting in the eventual improvement in workpiece roundness; (4) The workpiece profile formed and the resultant roundness greatly depends on the difference between the center height angles at the entrance and the exit. When the difference is kept constant, the center height affects significantly the final roundness; the optimum roundness is obtained when letting the average value of the center height angle be around 6.5°.
机译：本文对大进给量直通无心磨削中的工件倒圆过程进行了计算机仿真和实验研究。在直进式无心磨削操作中，与通常情况相比，当磨削余量极大时，工件的几何支撑条件（例如中心高度）在磨削过程中将发生显着变化。这导致工件倒圆过程的复杂化，并且使操作人员难以设定最佳条件。为了帮助操作员有效地设置条件，预测工件最终轮廓及其圆度的方法的建议是有意义的。为此，提出了一种计算机仿真方法，并进行了实际实验以验证该方法。得到的结果表明：（1）工件的中心高度随磨削时间的增加而线性减小，导致磨削过程中工件直径的线性减小，磨削余量更大。 （2）磨削余量取决于刀片顶面的倾斜角度，这意味着可以通过使用具有合适顶面倾斜度的刀片来确定磨削余量； （3）在磨削过程中，随着小不规则现象的出现，工件圆周上较大的不规则性变小，最终改善了工件的圆度。 （4）所形成的工件轮廓以及由此产生的圆度在很大程度上取决于入口和出口的中心高度角之间的差异。当差异保持恒定时，中心高度会显着影响最终的圆度。当中心高度角的平均值约为6.5°时，可获得最佳的圆度。

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