钎焊金刚石铣磨刀具磨粒粒度尺寸与排布间距对CFRP磨削质量的影响

碳纤维增强复合材料（carbon fiber reinforced plastics，CFRP）由于其低层间结合力和各向异性导致其加工过程中易出现分层、毛刺、撕裂等加工缺陷和刀具耐用度低等问题。采用有序排布钎焊金刚石磨削刀具及"以磨代切"加工工艺能够有效减轻分层缺陷。为制备出适合CFRP磨边加工的钎焊金刚石刀具，本试验制备了不同磨粒排布间距与不同磨粒粒度尺寸的5种刀具，对比分析了刀具结构变化对CFRP磨边加工磨削力与加工表面质量的影响。试验结果表明:在一定范围内，在相同磨粒排布间距和加工参数下，随着磨粒粒度尺寸变大，磨削力变化很小，加工表面质量变差；在相同磨粒粒度尺寸与加工参数下，随着磨粒排布间距减小，磨削力先增大后减小，加工表面质量变好。 

Influence of grit size and arranging distance on workpiece integrity when grinding CFRP with brazed diamond milling tool

The low interlaminar adhension and anisotropy of carbon fiber reinforced plastics (CFRP) could result in serious machining defects such as delamination, burrs, tearing, and other problems such as short tool life.On the idea of "grinding instead of cutting", delamination can be improved by using brazed diamond cutting tool whose grits are orderly arranged.In order to manufacture appropriate brazed diamond tool which is suitable for CFRP edge grinding, five kinds of tools with different grit size and varied arranging distance are prepared and the influences of tool structure changes on grinding forces and surface integrity when edging machining CFRP are investigated comparatively.The results show that under the same grain arrangement and the machining parameters, increasing grit size has few influence on grinding force but leads to a worse surface quality.In addition, decreasing grit arranging distance contributes to the improvement of machining quality and the grinding force increases firstly then decreases under the conditions of commonly grain size and machining parameters.