考虑去除深度的砂带磨削路径规划方法
Tool-path Planning in Belt Grinding Considering Removal Depth

目前多数研究将加工轨迹规划作为单纯的几何问题，没有考虑力学影响，难以满足高精度加工要求。为了提高砂带磨削的加工精度，以其路径规划为研究对象，提出了一种基于去除深度的路径规划方法。基于赫兹接触理论，建立了砂带与工件接触区域的压强分布模型。基于Preston方程推导了材料线性长度去除深度方程，并最终建立了材料去除深度模型。以去除深度模型为基础，以残留高度为约束，建立了砂带磨削加工间距的规划方法，并给出了加工坐标的计算公式。实验结果表明，该路径规划方法可以避免过加工与欠加工现象，有效降低工件表面的残留高度，提高产品加工质量。
For the majority of current researches, the tool-path planning is only treated as a problem of geometry without considering the machining force, which cannot meet the high requirement of working accuracy. Therefore, the tool-path planning model for improving the working accuracy in belt grinding based on the removal depth is developed. Firstly, from the mechanical point of view and based on the Hertzian contact theory, a model for pressure distribution in the contact area between the belt and the workpiece was presented. And based on the Preston's equation, the calculation equation for the linear removal intensity, which was the removal depth per unit contact length along the grinding path, was presented, and the model for the overall removal depth was developed. Finally, based on the removal depth model and taking the scallop-height as a constraint, the planning algorithm for the interval between the adjacent grinding paths was developed and the calculation matrix of coordinates was presented. The experimental results show that the tool-path planning model can avoid the processing defects of overlapping and unprocessed region and effectively reduce the scallop-height so as to improve the processing quality