摘要
针对软固结磨粒气压砂轮不同成分组成的粘磨层(粘结剂与磨粒混合层)影响模具激光强化表面材料去除的问题,对不同目数磨粒与粘结剂百分比的粘磨层在单轴压缩载荷下的宏观力学特性展开了分析,提出了将离散元方法 PFC3D模拟技术应用于软固结气压砂轮光整加工领域,利用该软件建立了软固结磨粒群模型,建立了其与材料去除之间的联系。最后,通过Instron-5966l拉伸试验机进行了压缩实验,验证了仿真准确性;并针对激光强化模具表面进行了光整试验。研究结果表明,磨粒目数及粘结剂百分比不同的粘磨层对模具激光强化表面将产生不同的材料去除。
Aiming at the internal relations between the abrasives layers of soft consolidation pneumatic wheel which consists of different mate- rial and the laser surface strengthening material removal rate, the DEM software PFC3D was investigated. The model of the abrasives layer was established under the software PFC3D and the internal relationship between the macromechanic and the material removal rate was gained. Then a compression test was taken on the Instron-59661 tensile test machine and the simulation experiment are verified correcttly. The results indicate that the difference of the abrasive＇s mesh and volume matching will produce different material removal after a series of polishing ex- periments.
出处
《机电工程》
CAS
2015年第9期1197-1200,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51175471
50575208
51405444)
浙江省科技厅创新团队资助项目(2011R50011-07)
