磨削强化中磨削用量的优化设计  

THE OPTIMIZATION OF GRINDING DOSAGE ON GRINDING HARDENING

作　　者：张宁菊[1] 赵美林[1] 

机构地区：[1]无锡科技职业学院,无锡214028

出　　处：《机械强度》2016年第3期526-530,共5页Journal of Mechanical Strength

摘　　要：针对磨削强化试验有一定盲目性的现状,深入地探讨磨削过程的磨削用量的优化设计,提出按砂轮地貌优化切削用量的思路。以比磨削能为优化目标,以表面粗糙度和容屑空间为约束条件建立数学模型,得到一个完整的磨削强化的优化模型。以40Cr为研究对象,采用单纯形法或图解法求解,得出一组磨削用量的最佳组合。为正确评价优化用量的磨削强化效果,进行试验验证,取材料在变切深时进行研究。通过测量试验时的磨削力、计算比磨削能和热源强度等从理论角度进行分析;通过测试试件的维氏硬度和观察其金相组织,从试验的角度研究磨削强化的效果。结果表明,优化数据较为合理,磨削强化在其指导下进行试验,可以减少盲目性,提高强化效果。Aiming at the current situation of the grinding hardening test has certain blindness,the optimization design of the grinding process of grinding dosage was studied in depth and optimization of cutting parameter was proposed according to the grinding wheel topography. Taking specific grinding energy as the optimization goal,establishing the mathematical model with the chip surface roughness and the space as constraint condition,a complete model of the optimization of the grinding hardening was finally got. 40 Cr was taken as the research object,simplex method and graphical method were used to get the best combination of grinding dosage. In order to the correct evaluation of optimal dosage of grinding hardening effects,experimental verification was conducted and the materials were studied with the change of cutting depth. By measuring grinding force during tests,calculating specific grinding energy and heat source intensity from theoretical perspective; by testing vickers hardness and observing the microstructure of specimens from the perspective of the experimental research to study grinding hardening effect. The results showed that the optimized data is relatively reasonable and grinding hardening experiment under its guidance can reduce blindness and improve the effect of reinforcement.

关 键 词：磨削强化 磨削用量 优化设计 数学模型 40Cr 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] TG156