The effect of vibration cutting on minimum cutting thickness
The effect of vibration cutting on minimum cutting thickness
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DOI：
10.1016/j.ijmachtools.2005.12.011
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发表时间：
2006-12-01
影响因子：
14
通讯作者：
Ahn, JungHwan
中科院分区：
文献类型：
--
作者：
Son, SeongMin;Lim, HanSeok;Ahn, JungHwan
在超精密金刚石切削过程中，刀具的前角变为负值，因为刀具的刃口半径与亚微米切削深度相比要大得多。由于大的负前角的犁削效应导致不稳定的切削过程中没有连续的切屑。因此，为了通过微细且稳定的加工获得更高的加工精度，确定最小切削厚度是重要的。以前曾报道过连续切屑的临界切削深度由刀具的锋利度和工件与刀具之间的摩擦系数决定[S.M. Son等人，微切削中摩擦系数对最小切削厚度的影响，国际机床与制造杂志45（2005）529 - 535]。对于相同的刀具刃口半径，刀具-工件摩擦系数越大，最小切削厚度越薄。因此，相信通过物理方法增加摩擦系数将有效地实现更薄的稳定切削。在这项研究中，减少最小切削厚度的可能性进行了研究，通过改变刀具-工件的摩擦系数。采用振动切削的方法来提高摩擦系数。实验结果表明，该切削工艺能有效地提高摩擦系数，减小最小切削厚度。根据材料和振动条件，最小切削厚度减少约0.02 - 0.04 μ m。(c)2006爱思唯尔有限公司版权所有。
In the ultra-precision diamond cutting process, the rake angle of the tool becomes negative because the edge radius of a tool is considerably larger compared to the sub-micrometer depth of the cut. The effects of plowing due to the large negative rake angle result in an unstable cutting process without continuous chip. For this reason, it is important to determine minimum cutting thickness in order to enable greater machining accuracy to be obtained by fine and stable machining. It was previously reported that the critical depth of cut with a continuous chip was determined by the tool sharpness and the friction coefficient between a workpiece and a tool [S.M. Son, et al., Effects of the friction coefficient on the minimum cutting thickness in micro cutting, International Journal of Machine Tools and Manufacture 45 (2005) 529-535]. For the same edge radius of a tool, the higher the friction coefficient of the tool-workpiece, the thinner the minimum cutting thickness becomes. Therefore, it is believed that increasing the friction coefficient by a physical method would be effective to achieve thinner stable cutting. In this study, the possibility of reducing the minimum cutting thickness was investigated through changing the friction coefficient of a tool-workpiece. The vibration cutting method is applied to increase the friction coefficient. Experimental results show that the cutting technology is efficient for increasing the friction coefficient and decreasing the minimum cutting thickness. The minimum cutting thickness was reduced by about 0.02-0.04 mu m depending on materials and vibration conditions. (c) 2006 Elsevier Ltd. All rights reserved.