小直径磨棒磨削加工TiC颗粒增强钢基复合材料GT35  

Grinding of TiC particle-reinforced steel-matrix composite GT35 with small diameter grinding rods

作　　者：邵梦博 陈博川 高晓星 袁松梅[1,2,3] SHAO Mengbo;CHEN Bochuan;GAO Xiaoxing;YUAN Songmei(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China;Beijing Engineering Technological Research Center of High-Efficient and Green CNC Machining Process and Equipment,Beijing 100191,China;Ningbo Institute of Technology,Beihang University,Ningbo 315100,Zhejiang,China)

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京市高效绿色数控加工工艺及装备工程技术研究中心,北京100191 [3]北京航空航天大学宁波创新研究院,浙江宁波315100

出　　处：《金刚石与磨料磨具工程》2022年第3期338-347,共10页Diamond & Abrasives Engineering

基　　金：基础科研计划(JCKY2018601B201)。

摘　　要：为探究TiC颗粒增强钢基复合材料GT35合理的加工参数和冷却润滑条件,研究其对切削力、表面质量及刀具磨损的影响规律,采用小直径磨棒以侧面磨削方式开展试验。结果表明:干磨削会引起磨棒烧伤,极压磨削油的润滑效果优于水基合成磨削液的;磨棒在极压磨削油润滑下,磨削工件12 min后进入稳定磨损状态,其主要磨损形式为磨粒破碎、磨粒磨耗和磨粒脱落;主轴转速对切削力的影响大于进给速度的,且转速越高,切削力越小;工件表面粗糙度主要与磨棒磨粒出露高度的平整度有关,受加工参数的影响较小。用小直径磨棒磨削加工GT35材料时,应选择极压磨削油润滑,高主轴转速、中速进给的加工方式,以获得良好的刀具寿命、工件加工表面质量及适当的加工效率。Side milling experiments with small diameter grinding rods were carried out on TiC particle-reinforced steel-matrix composite to investigate the reasonable machining parameters and the cooling and lubrication conditions for this material,and to understand the influence of machining parameters on cutting forces,surface quality and tool wear.The results show that dry cutting and water-based synthetic grinding fluids lubrication are not as effective as extreme pressure grinding oil lubrication,especially that dry cutting causes tool burn.With extreme pressure grinding oil lubrication,the tool wear is stable after 12 minutes of continuous grinding,the main wear forms of which are fracture of abrasive grain wear,abrasive grain breakage and abrasive grain shedding.It is also found that the influence of spindle speed on cutting force is greater than that of feed speed,namely higher spindle speed leading to smaller cutting force,and that the machined surface roughness is mainly related to the level of tool abrasive grain but less affected by spindle speed and feed speed.In conclusion,when grinding TiC particle-reinforced steel-matrix composites,the conditions of extreme pressure grinding oil lubrication,high spindle speed and medium feed rate are recommended to obtain good tool life,surface quality and appropriate processing efficiency.

关 键 词：碳化钛颗粒增强钢基复合材料 磨削 冷却润滑 刀具磨损 工艺特征 

分 类 号：TG74[金属学及工艺—刀具与模具] TG58[化学工程—高温制品工业] TQ164