摘要
Si_(3)N_(4)陶瓷圆柱滚子在极端工况中表现出优异的服役性能,但其硬脆特性等导致加工困难。为实现Si_(3)N_(4)陶瓷圆柱滚子高质量、高柔性的加工,提出金刚石砂带超精加工方法。通过搭建金刚石砂带超精加工试验平台,设计正交试验并对试验数据进行水平响应分析和方差分析,研究金刚石砂带磨料粒度、砂带线速度、砂带压力、导辊转速对Si_(3)N_(4)陶瓷圆柱滚子工件(ϕ10 mm×12 mm)表面粗糙度Ra和材料去除率RMRR的影响规律。结果表明:金刚石砂带磨料粒度对工件表面粗糙度和材料去除率的影响均最显著,砂带压力相较于砂带线速度和导辊转速对工件表面粗糙度的影响较大,而砂带线速度相较于砂带压力和导辊转速对材料去除率的影响较大。当金刚石砂带磨料粒度代号为P3000、砂带线速度为10 m/s、砂带压力为94 N、导辊转速为300 r/min时,工件表面粗糙度最小值为0.0452μm;当金刚石砂带磨料粒度代号为P2000、砂带线速度为20 m/s、砂带压力为94 N、导辊转速为200 r/min时,材料去除率最大值为1.07531μm/min。采用金刚石砂带超精加工方法,可有效提高Si_(3)N_(4)陶瓷圆柱滚子的表面质量。
Objectives:Si_(3)N_(4) ceramic cylindrical rollers show excellent service performance in extreme working conditions,but their hardness and brittleness and other characteristics lead to difficulties in machining.To realize high-quality and highly flexible machining and manufacturing of Si_(3)N_(4) ceramic cylindrical rollers,a diamond abrasive belt superfinishing machining method for Si_(3)N_(4) ceramic cylindrical rollers is proposed.Methods:By building an ultra precision machining experimental platform with a diamond abrasive belt,designing orthogonal experiments,and conducting horizontal response analysis and ANOVA on the experimental data,the influences of abrasive particle size in the diamond abrasive belt,abrasive belt linear velocity,abrasive belt pressure and guide roller speed on the surface roughness Ra and the material removal rate RMRR of Si_(3)N_(4) ceramic cylindrical roller workpieces(ϕ10 mm×12 mm)are studied.Results:The effects of abrasive grain size in the diamond abrasive belt on both surface roughness and material removal rate of the workpiece are the most significant.The effects of diamond abrasive belt pressure on the surface roughness of the workpiece are larger compared to those of diamond abrasive belt linear speed and guide roller rotational speed,while the effects of diamond abrasive belt linear speed on material removal rate are larger compared to those of diamond abrasive belt pressure and guide roller rotational speed.The minimum value of surface roughness of the workpiece is 0.0452μm when the grain size code of the diamond belt is P3000,the linear speed of the diamond belt is 10 m/s,the pressure of the diamond belt is 94 N,and the rotational speed of the guide roller is 300 r/min;the minimum surface roughness of the workpiece is also 0.0452μm when the grain size code of the diamond belt is P2000,the linear speed of the diamond belt is 20 m/s,the pressure of the diamond belt is 94 N,the rotational speed of the guide roller is 200 r/min.When the rotational speed is 200 r/min,the maximum material removal rate is 1.07531μm/min.Conclusions:The surface quality of Si_(3)N_(4) ceramic cylindrical rollers can be effectively improved by using the superfinishing method with a diamond abrasive belt.
作者
王洪亮
李颂华
金驰
田凯
郭昊
赵梓辰
WANG Hongliang;LI Songhua;JIN Chi;TIAN Kai;GUO Hao;ZHAO Zichen(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang 110168,China;China National-Local Joint Engineering Laboratory of NC Machining Equipment and Technology of High-Grade Stone,Shenyang 110168,China)
出处
《金刚石与磨料磨具工程》
北大核心
2025年第4期496-503,共8页
Diamond & Abrasives Engineering
基金
国家自然科学基金(联合基金)重点项目(U23A20631)
辽宁省应用基础研究计划项目(2022JH2/101300216)。
作者简介
通信作者:李颂华,男,1977年生,教授、博士生导师。主要研究方向:难加工材料高效精密加工工艺与装备、高性能数控机床主轴系统等。E-mail:rick_li2000@163.com。
