磨粒有序化砂轮磨削微沟槽减阻表面的研究

Effect of abrasive pattern on grinding micro-groove drag-reduction surface

为研究砂轮磨粒排布样式对磨削结构化沟槽表面的影响,使用叶序、错位和阵列3种磨粒有序化排布的砂轮磨削工件平面。首先,建立3种有序化排布的数学模型;其次,根据结构化沟槽表面减阻的特性参数,设计砂轮磨削参数,并使用MATLAB软件进行磨削运动仿真,将仿真结果与理论计算值进行比较;最后,使用磨削试验验证数学模型与仿真结果的可靠性。结果表明:3种磨粒排布有序化的砂轮均能磨削出微沟槽表面,此时相邻两行磨粒的轴向间距分别为0.04 mm(叶序排布)、0.40 mm(错位排布)和0.80 mm(阵列排布),对应的磨削深度均为0.050 0 mm;磨粒阵列和错位排布的砂轮磨削出的沟槽表面更加稳定,但沟槽的参数比未能达到0.200~1.000的要求;磨粒叶序排布的砂轮加工出的沟槽,能满足表面减阻特性的要求。

In order to study the effect of abrasive arrangement pattern on grinding the surface of structured grooves,grinding wheels with three different abrasive orderly arrangements, namely phyllotactic pattern, staggered pattern and array pattern, were used to grind a flat surface. Firstly, the mathematical models of the three abrasive arrangements were established. Secondly, the parameters of grinding wheels were designed according to characters of drag reduction on structured groove surface. And the MATLAB was used to simulate the grinding process, the results of which were compared with the theoretically calculated values. Finally, the reliability of the model and simulation was proved by grinding experiment. The results show that all the three orderly abraive arrangements can be used to grind the micro-groove surface at a grinding depth of 0.050 0 mm, while the axial distances of adjacent abrasive rows are 0.04 mm(phyllotaxis pattern), 0.40 mm(staggered pattern) and 0.80 mm(array pattern), respectively. The groove surfaces ground by the grinding wheels with array abrasive or staggered abrasive are more stable, but the groove parameter ratios cannot meet the requirement of 0.2~1.0. By using the grinding wheel with phyllotactic arranged abrasive, the machined grooves meet the requirements on feature parameters of drag-reduction surface.