共查询到19条相似文献,搜索用时 97 毫秒
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金属切削是常用的机械制造加工手段,不同的切削参数对加工过程的影响不一样,本文利用有限元软件,通过对金属加工过程的模拟,得到不同参数对加工过程的影响曲线,为正确的选择加工参数提供了理论依据。 相似文献
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针对微细切削加工中存在的尺度效应,研究了微细切削加工中尺度效应产生的机理,通过建立微细切削加工有限元模型,模拟并分析了微细切削加工过程的尺度效应,揭示了切削刃钝圆半径引起尺度效应的内在作用机理。 相似文献
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运用商业非线性有限元软件DEFORM对金属切削加工过程进行模拟,分析了不同刀具前角、钝圆半径在切削加工过程中对切削温度,切削应力的影响,为刀具设计提供了依据。 相似文献
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Yuwen Sun Jun Wang Dongming Guo Qiang Zhang 《The International Journal of Advanced Manufacturing Technology》2008,36(5-6):525-534
The classical conjugation and envelope method is very accurate and effective for forward and inverse calculations of grinding
helical surfaces. However, this method involves complicated mathematics and requires that the profiles be continuous. It can
also result in undercutting or interference to the desired surface profiles. In this paper, a new approach is proposed to
simulate the grinding process of helical surfaces on cutting tools. The paper begins with the reconstruction of cutter helicoids
from sampled points. Using the recovered helical parameters from the sample points, the cross-sectional profile of the cutter
surface is derived using a polynomial curve. A numerical method for calculating the profile of the grinding wheel required
for the cutter surface profile is then provided. Finally, an optimization method is presented for solving the problem of inverse
calculation to determine the helical surface profile for a given grinding wheel profile and setting parameters. The feasibility
of the approach is tested by simulation results, which shows that the proposed approach can eliminate undesired tool-work
interferences and undercutting. 相似文献
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The results of calculations concerning the effect of friction between tools and material are presented for a pair of collinear knife-edge dies cutting a wide strip of metal of finite thickness. The friction so acts as to increase the depth of penetration required before the metal between the dies becomes wholly plastic. 相似文献