Petrescu Marius Gabriel, Dumitru Teodor, Laudacescu Eugen, Tănase Maria
Mechanical Engineering Department, Petroleum-Gas University of Ploiești, 100680 Ploiesti, Romania.
Materials (Basel). 2024 Jul 13;17(14):3475. doi: 10.3390/ma17143475.
Abrasion wear is a significant concern for cutting tools, particularly when milling asphalt concrete due to the presence of hard mineral aggregate particles. The pressure exerted on the cutting tool by the chipped material and the resulting cutting forces directly influence tool wear. To estimate the cutting forces in asphalt milling, the authors propose using either laboratory experiments or cost-effective Discrete Element Method (DEM) modeling-by simulating the real conditions-as direct measurement under real conditions is challenging. This article presents results from an original experimental program aimed at determining the cutting forces during asphalt pavement milling. A specialized stand equipped with a moving plate and recording devices was designed to vary milling depth, rotational speed, and advance speed. The experimental results for horizontal force values were compared with numerical results from DEM modeling. It was found that both increasing the milling depth and the advance speed lead to higher cutting forces. Generally, DEM modeling trends align with experimental results, although DEM values are generally higher. The statistical analysis allowed identification of the milling depth as the most significant parameter influencing cutting force and the optimal combination of milling parameters to achieve minimum horizontal force acting on cutting tooth, namely, 15 mm milling depth and 190 mm/min advanced speed.
磨损是切削刀具面临的一个重大问题，尤其是在铣刨沥青混凝土时，因为其中存在坚硬的矿物集料颗粒。切屑材料对切削刀具施加的压力以及由此产生的切削力直接影响刀具磨损。为了估算沥青铣刨过程中的切削力，作者建议采用实验室试验或具有成本效益的离散元法（DEM）建模——通过模拟实际工况，因为在实际工况下进行直接测量具有挑战性。本文介绍了一个旨在确定沥青路面铣刨过程中切削力的原创性试验项目的结果。设计了一个配备移动板和记录装置的专用试验台，以改变铣刨深度、转速和前进速度。将水平力值的试验结果与离散元法建模的数值结果进行了比较。结果发现，增加铣刨深度和前进速度都会导致更高的切削力。一般来说，离散元法建模趋势与试验结果一致，尽管离散元法得到的值通常更高。统计分析确定了铣刨深度是影响切削力的最显著参数，以及实现作用在切削齿上的水平力最小的铣刨参数的最佳组合，即15毫米铣刨深度和190毫米/分钟前进速度。
