金刚石结块磨粒排布层间距实验
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摘要
分析现有磨粒层间距估算方法,采用洛氏金刚石压头对中等硬度花岗石G603直线等深度划擦.通过测量相同划擦深度、不同划擦间距下划擦过程的划擦力,观察划擦后划痕的形貌,综合分析划擦过程材料去除与划擦力和划痕间距的关系,并优选磨粒排布层间距.实验结果表明:磨粒层间距L存在一临界值间距L_s.当L≤L_s时,划擦力随着L的增大而增大,磨粒间工件材料可通过干涉式整体体积破碎去除;当L>L_s时,磨削力趋于稳定,不随L增大而变化,磨粒协同干涉作用消失,磨粒间工件材料无法成片去除.
In this paper,based on the review of the existing methods for estimating abrasive layers interval spacing,Rockwell diamond indenters were used to scratch a medium-hardness granite G603 with equal scratch depth.During scratching,cutting force on workpiece was monitored.After scratching test,the surface of workpiece was observed.The relationship between the material removal mechanisms and scratch force was discussed in regards with different interlayer spacing.The results show that there is a critical spacing Ls.When the interlayer spacing Lis less than or equal to L_s,the scratch force increases with the increase of L,and the material adjacent grains is entirely removed by volume-fractured due to the interference of inter-grains;however,when Lis larger than L_s,the scratch force remained constant and the interference of inter-grains disappeared.As a result,the material can only be removed individually by each grain.
In this paper,based on the review of the existing methods for estimating abrasive layers interval spacing,Rockwell diamond indenters were used to scratch a medium-hardness granite G603 with equal scratch depth.During scratching,cutting force on workpiece was monitored.After scratching test,the surface of workpiece was observed.The relationship between the material removal mechanisms and scratch force was discussed in regards with different interlayer spacing.The results show that there is a critical spacing Ls.When the interlayer spacing Lis less than or equal to L_s,the scratch force increases with the increase of L,and the material adjacent grains is entirely removed by volume-fractured due to the interference of inter-grains;however,when Lis larger than L_s,the scratch force remained constant and the interference of inter-grains disappeared.As a result,the material can only be removed individually by each grain.
引文
[1]姜荣超,金刚石均布并有序排列是改善金刚石工具性能的有效途径[J].石材,2006,10(14):28-37.
[2]KOSHY P,LWASAKI A,ELBESTAWI M.Surface generation with engineered diamond wheel:Insights from simulation[J].Annals of the Cipr,2003,52(1):271-274.
[3]胡焕校,刘静.岩粉对金刚石锯片胎体磨损的影响及其浓度计算[J].中国有色金属学报,1998,8(1):170-173.
[4]张绍和,叶宏煜,杨仙.有序排布金刚石锯片中排列参数的设计[J].金刚石与磨料磨具工程,2008,164(2):29-32.
[5]章文姣,段隆臣,叶宏煜,等.孕镶金刚石钻头中有序排列参数的确定[J].金刚石与磨料磨具工程,2010,179(30):21-25.
[6]段端志.磨粒有序排布金刚石锯片的研制及其加工性能研究[D].南京:南京航空航天大学,2012:29-32.
[7]田霖.基于磨粒有序排布砂轮的高速磨削基础研究[D].南京:南京航空航天大学,2013:48-62.
[8]YIN Shaohui,CHEN Fengjun,YU Jianwu,et al.A novel orderly arrangement method controlled by magnetic field for diamond abrasives of grinding wheel[J].Advanced Materials Research,2012,497:6-9.
[9]张美琴,高振,吴海融,等.花岗石锯切过程声发射信号特征的实验[J].华侨大学学报(自然科学版),2015,36(6):615-619.
[10]BUTLER-SMITH P,AXINTE D,DAINE M,et al.Mechanisms of surface response to overlapped abrasive grits of controlled shapes and positions:An analysis of ductile and brittle materials[J].CIPR Annals-Manufacturing Technology,2014,63(1):321-324.
[11]TRANSCHEL R,LEINENBACH C,WEGENER K.Cutting and ploughing forces for small clearance angles of hexa-octahedron shaped diamond grains[J].CIPR Annal-Manufacturing Technology,2014,63(1):325-328.
[12]屠厚泽,高森.岩石破碎学[M].北京:地质出版社,1990:79-82.
[13]徐晓荷,余静.岩石破碎学[M].北京:煤炭工业出版社,1984:78-230.
[2]KOSHY P,LWASAKI A,ELBESTAWI M.Surface generation with engineered diamond wheel:Insights from simulation[J].Annals of the Cipr,2003,52(1):271-274.
[3]胡焕校,刘静.岩粉对金刚石锯片胎体磨损的影响及其浓度计算[J].中国有色金属学报,1998,8(1):170-173.
[4]张绍和,叶宏煜,杨仙.有序排布金刚石锯片中排列参数的设计[J].金刚石与磨料磨具工程,2008,164(2):29-32.
[5]章文姣,段隆臣,叶宏煜,等.孕镶金刚石钻头中有序排列参数的确定[J].金刚石与磨料磨具工程,2010,179(30):21-25.
[6]段端志.磨粒有序排布金刚石锯片的研制及其加工性能研究[D].南京:南京航空航天大学,2012:29-32.
[7]田霖.基于磨粒有序排布砂轮的高速磨削基础研究[D].南京:南京航空航天大学,2013:48-62.
[8]YIN Shaohui,CHEN Fengjun,YU Jianwu,et al.A novel orderly arrangement method controlled by magnetic field for diamond abrasives of grinding wheel[J].Advanced Materials Research,2012,497:6-9.
[9]张美琴,高振,吴海融,等.花岗石锯切过程声发射信号特征的实验[J].华侨大学学报(自然科学版),2015,36(6):615-619.
[10]BUTLER-SMITH P,AXINTE D,DAINE M,et al.Mechanisms of surface response to overlapped abrasive grits of controlled shapes and positions:An analysis of ductile and brittle materials[J].CIPR Annals-Manufacturing Technology,2014,63(1):321-324.
[11]TRANSCHEL R,LEINENBACH C,WEGENER K.Cutting and ploughing forces for small clearance angles of hexa-octahedron shaped diamond grains[J].CIPR Annal-Manufacturing Technology,2014,63(1):325-328.
[12]屠厚泽,高森.岩石破碎学[M].北京:地质出版社,1990:79-82.
[13]徐晓荷,余静.岩石破碎学[M].北京:煤炭工业出版社,1984:78-230.