Improvement of form accuracy in cylindrical traverse grinding with steady rest by controlling traverse speed
Improvement of form accuracy in cylindrical traverse grinding with steady rest by controlling traverse speed
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DOI：
10.1299/jamdsm.2021jamdsm0049
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发表时间：
2021-01-01
影响因子：
0.9
通讯作者：
Ohashi, Kazuhito
中科院分区：
文献类型：
--
作者：
Fujii, Hidetaka;Onishi, Takashi;Ohashi, Kazuhito
在外圆横向磨削中，细长工件由于刚度小，在法向磨削力作用下发生弯曲。因此，在磨削过程中工件的弹性变形会产生形状误差。为了防止工件的这种变形，通常使用稳定的支架。然而，当工件与固定架之间的接触点被磨削时，固定架的推力丧失，工件的弹性变形立即增加。结果，在接触点处产生台阶形状误差。为了提高静置架的利用率，本文采用考虑静置架的梁模型模拟磨削过程中工件的弹性变形。分析结果表明，在磨削部分外侧设置稳定架可以减小工件的弹性变形。此外，控制横动速度以保持恒定的弹性变形。通过磨削实验，证实了在磨削部外侧设置稳定架和调整进给速度可以提高细长工件的形状精度。
In cylindrical traverse grinding, a slender workpiece is bent by the normal grinding force due to its low stiffness. Consequently, a form error is generated by the elastic deformation of the workpiece during the grinding process. To prevent such deformation of the workpiece, a steady rest is generally used. However, when the contact point between the workpiece and the steady rest is ground, the pushing force of the steady rest is lost, and the elastic deformation of the workpiece is increased immediately. As a result, a step shape error is generated at the contact point. To improve the use of the steady rest, the elastic deformation of the workpiece during the grinding process is simulated using the beam model considering the steady rest in this study. From the analysis results, it was determined that placing the steady rest outside the grinding part can reduce the elastic deformation of the workpiece. In addition, the traverse speed was controlled to maintain a constant elastic deformation. Through grinding experiments, it was confirmed that the form accuracy of the slender workpiece was improved by setting the steady rest outside the grinding part and adjusting the traverse speed.