单层CBN砂轮感应钎焊温度的优选方法研究  

Study on optimal method of induction brazing temperature for single-layer CBN grinding wheel

作　　者：李奇林[1] 丁凯[1] 雷卫宁[1] 单大平 LI Qilin;DING Kai;LEI Weining;SHAN Daping(Jiangsu University of Technology, Changzhou 213001, Jiangsu, China;AECC Aviation Power Co . ,Ltd . , Xi′an 710021, China)

机构地区：[1]江苏理工学院,江苏常州213001 [2]中国航发动力股份有限公司,西安710021

出　　处：《金刚石与磨料磨具工程》2021年第2期17-22,共6页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51905234,51805231)。

摘　　要：现有研究中CBN砂轮的钎焊温度优选方法通常是从离散的温度序列中选择出某一温度为最佳温度,存在最佳温度不精确等缺陷。提出一种以钎焊温度为自变量、砂轮锋利度和砂轮寿命2个磨削性能指标为目标的数学评价模型,采用高频感应钎焊工艺制备多组CBN砂轮并用其开展TC4钛合金磨削试验,对试验数据进行三次样条插值,获得单层CBN砂轮钎焊温度评价函数,优选出单层CBN砂轮感应钎焊最佳温度为936.5℃。在恒定磨削用量条件下的磨削性能评价函数试验值相对其理论预测值偏高约3.4%,表明了该评价模型与钎焊温度优选方法的可靠性。The traditional optimizing methods of brazing temperature for CBN grinding wheels were adopting one of a discrete temperature sequence.In order to acquire the exact optimal temperature during brazing of CBN wheels,a newly optimizing method of induction brazing temperature was proposed.A mathematical evaluation model,which took brazing temperature as independent variable,was established to evaluate the grinding performance.The sharpness of grains and service life of the wheel were both taken into account in this mathematical model.Grinding tests of TC4 titanium were carried out with a group of induction brazed CBN wheels.The temperature evaluation function of brazed CBN wheel was obtained based on the cubic spline interpolation of the experimental data.The optimal brazing temperature for CBN grinding wheels was 936.5℃according to the evaluation function.Experimental results of the evaluation function showed about 3.4%larger than that of theoretical value.It was implied that the brazing temperature evaluation model and the optimizing method were both reliable.

关 键 词：感应钎焊 立方氮化硼砂轮 温度 评价模型 优选方法 

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