摘要
针对难加工材料A-100超高强度钢的加工性能差,刀具磨损严重等问题,进行了传统切削液冷却切削与低温风冷微量润滑切削加工对比试验。通过改变冷却温度,切深和进给量参数,分析了刀具寿命变化规律,利用普赛PV4030-DCC影像仪和蔡司Gemini360分别观察了断屑外观形貌和刀具磨损形貌,通过相关分析法对综合加工效率的影响因素进行探究。结果表明,低温风冷微量润滑加工的刀具寿命,刀具磨损和断屑断裂形态均显著优于切削液冷却加工。当切深和进给量增加时,刀具寿命均下降。低温风冷微量润滑加工均能不同程度提升刀具寿命,并得出了最优的加工参数。影响综合加工效率的主要因素是切深,具有强相关关系。实验结果证明低温风冷微量润滑加工A-100超高强度钢具有实际加工应用前景。
In view of the poor machinability and serious tool wear of the difficult to machine material A-100 steel,the contrast experiments of coolant and cryogenic MQL were carried out.By changing the parameters of cooling temperature,cutting depth and feed rate,the rule of tool life was analyzed.The chip breaking appearance and tool wear morphology were observed using the Pusai PV4030-DCC image scope and Zeiss Gemini 360 scanning elextron microscope(SEM)respectively.The influencing factors of comprehensive processing efficiency were explored through correlation analysis.The results show that the tool life,tool wear and chip breaking fracture morphology of cryogenic MQL are significantly better than those of coolant method.When the cutting depth and feed rate increase,the tool life decreases.Cryogenic MQL can improve the tool life in varying degrees,and the optimal machining parameters are obtained.The main factor affecting the comprehensive processing efficiency is the cutting depth,which has a strong correlation.The experimental results show that the cryogenic MQL processing of A-100 super strength steel has practical processing and application prospects.
作者
陈家成
林立
CHEN Jiacheng;LIN Li(School of Mechatronics and Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《组合机床与自动化加工技术》
北大核心
2023年第8期153-159,共7页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金资助项目(52175042)。
