Abstract

In order to study the influence of different lubrication conditions on cutting force, surface roughness and work hardening, single factor milling tests on 300M steel were carried out under five lubrication conditions of dry cutting, cryogenic cold air cutting, water mist cooling cutting, oil mist friction-reducing cutting and Cryogenic Minimum Quantity Lubrication (CMQL) cutting. Through orthogonal test under CMQL cutting condition, the influence of process parameters, such as cold air temperature, cold air pressure and cutting fluid dosage on workpiece surface quality and tool wear was studied, and the process parameters were optimized. Through the results of single factor and orthogonal tests, it is found that compared with other cutting conditions, CMQL cutting condition can get lower surface finish, work hardening and smaller cutting forces. And compared with other influencing factors, cold air pressure was the most important influencing factor in high-speed milling 300M steel under CMQL cutting condition, and its optimal value was 0.6 mpa.

摘要

为了研究不同润滑条件对切削力、表面粗糙度和加工硬化的影响，在干切削、低温冷空气切削、水雾冷却切削、油雾五种润滑条件下对300M钢进行单因素铣削试验。减少摩擦切割和低温微量润滑 (CMQL) 切割。通过CMQL切削条件下的正交试验，研究了冷风温度、冷风压力、切削液用量等工艺参数对工件表面质量和刀具磨损的影响，优化了工艺参数。通过单因素和正交试验的结果发现，与其他切削条件相比，CMQL切削条件可以获得更低的表面光洁度、加工硬化和更小的切削力。