齿轮钢缓进给深磨的工艺可行性分析

以齿轮钢40CrNiMo为研究对象,保持金属去除率一定,改变磨削深度和工件进给速度,测量磨削力,计算磨削力比和磨削比能.观察磨削表面微观组织变化,测量磨削表面粗糙度、表层亚表层微硬度变化、磨削表面残余应力,探讨深切缓进给磨削在齿轮钢磨削过程中的工艺可行性.缓进给深磨对比试验表明:在等金属去除率条件下,缓进给深磨的磨削表面质量较好,加工效率高,利用缓进给深磨加工齿轮钢进行去余量加工具有很高的可行性;由于缓进给深磨热影响区较大,不适合于齿轮钢精密成形加工,必须增加精磨工序.

Feasibility Analysis of Creep Feed Grinding Gear Steel

In this paper creep feed grinding experiment of gear steel 40CrNiMo was conducted under variable grinding depths and feed speeds, and constant metal removal rates. Grinding force ratio and specific grinding energy have been calculated to analyze the machinability of gear steel during creep feed grinding process. Surface integrity, including surface roughness, micro-hardness and residual stress, has been investigated to study the feasibility of creep feed grinding gear steel. The results reveal that the grinding surface quality is acceptable with high material removal rate and working efficiency, so the creep feed grinding process is an excellent choice to remove the machining allowance rapidly. However, it is not suitable for the final precision machining of gear due to large residual stress from high temperature grinding.