Yuan Xiuhua, Wang Chong, Sun Qun, Zhao Ling
School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng 252000, China.
Materials (Basel). 2021 Nov 4;14(21):6647. doi: 10.3390/ma14216647.
Abrasive filament brushes have been widely used in surface processes for a wide range of applications, including blending, edge-radiusing, and polishing. However, the associated brush mechanics of material removal is still not clear. In order to analyze the brush grinding of aluminium alloy, this paper constructed a kinematic model of a single filament, simulated the scratch process of a single abrasive grain, and investigated the brush force and material removal based on the finite element approach. The simulated result shows that the brush grinding can be changed from elastic-plastic deformation to chip formation when increasing the brush speed to 1000 r/min. The normal and tangential forces increase linearly and quadratically with the increase in the rotation speed (500-5000 r/min), respectively, and increase linearly with the increase in the penetration depth (0.1-1 mm), which is consistent with the experiment results. In addition, the amount of material removal initially increases with the increase in penetration depth, and then decreases. This paper provides a new approach to understanding the process of material removal and is helpful for the selection of reasonable brush parameters in the intelligent grinding control application.
磨料丝刷已广泛应用于各种表面处理工艺中，包括打磨、倒棱和抛光等。然而，与之相关的材料去除刷削机理仍不明确。为了分析铝合金的刷削磨削，本文构建了单丝的运动学模型，模拟了单个磨粒的划痕过程，并基于有限元方法研究了刷削力和材料去除情况。模拟结果表明，当刷速提高到1000转/分钟时，刷削磨削可从弹塑性变形转变为切屑形成。法向力和切向力分别随着转速（500 - 5000转/分钟）的增加呈线性和二次方增加，并随着穿透深度（0.1 - 1毫米）的增加呈线性增加，这与实验结果一致。此外，材料去除量最初随着穿透深度的增加而增加，然后减少。本文为理解材料去除过程提供了一种新方法，有助于在智能磨削控制应用中选择合理的刷削参数。
