38CrMoAl渗氮钢微晶刚玉砂轮摆线磨削工艺试验研究

Experimental Study on Cycloidal Grinding of Nitrided Steel 38CrMoAl with Microcrystalline Corundum Grinding Wheel

在实际磨削38CrMoAl渗氮钢过程中,存在磨削烧伤情况。本文分别采用白刚玉砂轮和微晶刚玉砂轮磨削38CrMoAl渗氮钢,对比研究了不同磨料类型刚玉砂轮对磨削力和表面粗糙度的影响规律。试验结果表明:相较于白刚玉砂轮,微晶刚玉砂轮磨削时磨削力降低了14.2%。基于正交试验方法,通过微晶刚玉砂轮平面磨削试验,探究了磨削工艺参数对磨削力和工件表面粗糙度的影响。结果分析表明:磨削深度对磨削力影响最大,其次是工件进给速度和砂轮转速;对于工件表面粗糙度而言,工件进给速度的影响最大,其次是砂轮速度和磨削深度。最终采用微晶刚玉砂轮对38CrMoAl渗氮钢齿轮样件进行批次加工,结果显示无磨削烧伤发生,且磨削表面质量得到了显著提高。

In the actual grinding process of 38CrMoAl,there are grinding burns.In this paper,white corundum grinding wheels and microcrystalline corundum grinding wheels are used to grind nitrided steel 38CrMoAl,and the effect of different types of abrasive corundum grinding wheel on the grinding force and surface roughness is studied in comparison.The experimental results show that the grinding force is reduced by 14.2%.Through orthogonal experiments on surface grinding with microcrystalline corundum wheel,the effects of grinding process parameters on grinding force and workpiece surface roughness are investigated.The results show that grinding depth is the most influential element on grinding force,followed by workpiece feed rate and wheel speed.And then workpiece feed speed is the most important influence element on the surface roughness,followed by wheel speed and grinding depth.Finally,batch machining of nitrided steel 38CrMoAl gear samples are carried out with microcrystalline corundum grinding wheels,and the results show that there is no grinding burns on the workpieces surface and it has a significant improvement of the grinding surface quality.