Ming CHEN
,
Fanghong SUN
,
Youngmoon LEE
,
Seunghan YANG
,
Jongchan LEE
材料科学技术（英文）
Most of the mechanical dressing technologies for resin bonded superabrasive grinding wheels are time consuming and costly. Based on the outcomes of the simulations in the previous study, this paper demonstrates the comprehensive researches on the laser-assisted dressing process control, grinding wheel topography reconfiguration by 3D laser scanning technology and analyses of grinding temperature. The synthesized parameter incorporates the laser dressing process parameters and can be used to the process control. In order to evaluate the laser-assisted dressing effectiveness, the newly developed non-contact laser measuring system based on the principle of the triangulation was used. Grain protrusion height and intergrain spacing can characterize the grinding wheel surface. A series of grinding tests with the laser-assisted dressed grinding wheel and mechanically dressed grinding wheel were conducted for comparison. The results proved the feasibility of laser-assisted dressing for resin bonded superabrasive grinding wheels and revealed the importance of choosing appropriate laser dressing parameters.
关键词:
Grinding wheel topography
,
null
,
null
,
null
赵波
,
刘折
,
郑友益
,
卞平艳
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.04.005
以ELID电解原理为基础,结合超声振动辅助磨削过程中单颗磨粒的运动学分析,建立了超声ELID复合磨削条件下的磨削力数学解析模型,并对模型进行了分析和仿真.对模型的分析表明:超声振动改变了磨粒的运动轨迹,使同等条件下的未变形切屑厚度减小,砂轮的在线电解修整使磨粒始终处于锋锐状态,而且影响砂轮的实际切削深度,进而对磨削力产生影响.磨削力随着超声振动频率、振幅、电解电压、脉冲比、电解液电阻率的增大而减小;随着切削深度、工件速度的增大而增大.
关键词:
磨削
,
超声振动
,
ELID
,
磨削力
,
模型
Omid Goli Jolodar
,
Farhad Shirini
,
Mohadeseh Seddighi
催化学报
doi:10.1016/S1872-2067(17)62827-4
制备了碱性离子液体1,1'-(丁烷-1,4-二基)双(1,4-二氮杂二环[2.2.2]辛烷-1-ium)羟化物,并采用红外光谱、1H核磁共振谱和pH值分析对其进行了表征.然后将它用于室温研磨条件下高效催化合成吡喃酮[2,3-d]嘧啶酮和[2,3-d]嘧啶.该法步骤简单,反应时间短,产物收率高,无需柱色谱分离,原料易得,且可回收利用.
关键词:
碱性催化剂
,
多组分反应
,
嘧啶衍生物
,
研磨
