Residual stresses, distortion and surface roughness produced by grinding thin wall ductile iron plates
Residual stresses, distortion and surface roughness produced by grinding thin wall ductile iron plates
复制标题
DOI：
10.1016/j.ijmachtools.2006.04.004
复制
发表时间：
2007-02
影响因子：
14
通讯作者：
A. D. Sosa;M. Echeverría;O. Moncada;J. Sikora
中科院分区：
文献类型：
--
作者：
A. D. Sosa;M. Echeverría;O. Moncada;J. Sikora
本文研究了球墨铸铁薄壁板的磨削效应。在不同的磨削条件下，对不同结核数、铁化和干磨后的薄壁板进行了残余应力、形状畸变和表面粗糙度测量。在所有情况下，拉伸残余应力在表面最大，其轮廓随着深度而减小，直到变为压缩。在表面以下30μm处未观察到相变，但通过结核和晶粒扩大可以看到塑性变形。随着切削深度、结节数的增加和加工速度的降低，变形增大。随着结核数的增加，型材拉伸区的平均应力也增加。随着结瘤数的增加和加工速度的降低，表面粗糙度略有改善。当切割深度减小时，这种趋势更加明显。所得的算术平均粗糙度（Ra）值均小于0.8μm。
This work deals with grinding effects on thin wall ductile iron plates. Residual stresses, shape distortion and surface roughness were measured on thin wall plates of different nodule count, ferritised and afterwards dry ground under several grinding conditions. In all cases, tensile residual stresses are maximum at the surface, and their profile decreases with depth until becoming compressive. No phase transformations can be observed at depths of up to 30μm below surface, although plastic deformation is visible through nodules and grains enlargement. Distortion increases when the depth of cut and nodule count increase and the workspeed decreases. The mean stresses of the profile tensile zone also increase when the nodule count increases. Surface roughness improves slightly as nodule count increases and workspeed decreases. This tendency is more noticeable when depth of cut decreases. The arithmetic mean roughness (Ra) values obtained were always below 0.8μm.