刃-孔协同分布钎焊金刚石微结构端面磨头加工氧化铝陶瓷性能的研究

由于高温钎焊金刚石的石墨化以及钎焊工艺等问题的限制，细粒度钎焊金刚石砂轮的制造还存在一定难度。提出一种刃-孔协同分布的钎焊金刚石微结构端面磨头，在粗粒度钎焊金刚石磨头上用脉冲激光刻蚀制备了不同的微结构，研究此钎焊金刚石端面磨头加工氧化铝陶瓷的磨削性能，对比不同微结构下的磨削力、被加工材料的表面质量以及金刚石磨粒的磨损特征。研究表明:与普通钎焊金刚石磨头相比，激光刻蚀的钎焊金刚石微刃磨头的磨削力和表面粗糙度分别降低了37%～51%和18%～25%，其中刃/孔数量比为1∶1的钎焊金刚石磨头的磨削力和表面粗糙度最低。 

Preparation of edge-hole co-distributed brazed diamond microstructure end-grinding wheel and its grinding performance on alumina ceramics

Due to the easy graphitization of diamond during high temperature brazing and the limitation of brazing process,it is still difficult to prepare brazed diamond grinding wheels with finer particle size.In present study,the brazed diamond grinding wheels with different textures,which mainly consisted of edges and holes,were prepared.On coarse diamond grits brazed on the wheels,the textures were micro-machined by pulsed laser.The grinding performance of textured diamond wheels on alumina ceramic was examined.Effect of the textures on grinding forces,surface roughness and wear of diamond girt were compared.It is found that compared with traditional brazed diamond grinding wheels,the micro-edge wheels,which have been curved by lasers,have 37%to 51%lower grinding forces and 18%to 25%smaller roughness.Specially,the wheel with 1∶1 number ratio of edges to holes performs the lowest grinding force and the smallest surface roughness.