金刚石与磨料磨具工程2024，Vol.44Issue(3)：297-303,7.DOI:10.13394/j.cnki.jgszz.2023.0171
激光选区熔化成形金刚石复合材料特征几何结构的工艺约束研究
Study on manufacturing process constraint of feature structures of diamond composite materials fabricated by selective laser melting
摘要
Abstract
Porous diamond grinding tools are a new type tools that can provide a space for chip holding and coolant flowing during the grinding process.selective laser melting(SLM)is an effective method for manufacturing porous dia-mond grinding tools.However,due to the limitations of spot size and layer by layer fabricating process in SLM process,the designed porous diamond tools are difficult to be manufactured accurately.Therefore,it is necessary to study the formability of diamond composite materials feature geometry structures.Based on CuSn20/diamond composites,a series of feature structures such as overhang structures,thin-walled,holes,and sharp angle structures with different fab-ricating directions and sizes were fabricated by SLM technology.The formability,forming errors,and causes of these structures are analyzed.The results show that the optimal formable length of the overhang structure is 1.0～2.0 mm;The minimum formable size of thin wall structures is 0.70 mm;The minimum formable diameter size of hole structures per-pendicular to the fabricating direction is 0.50 mm;The optimal forming diameter size for circular hole structures paral-lel to the fabricating direction is 1.00～4.00 mm;The formable angle of sharp angle structures should be greater than 10°.The forming error of feature structures is mainly affected by the thermal adsorption of laser on composite powder,the diffusion of laser spot heat affected zone,and the weak support of composite powder.This work provide a certain technical reference for the design and additive manufacturing of complex diamond tools.关键词
激光选区熔化/CuSn20/金刚石复合材料/特征几何结构/工艺约束Key words
seletive laser melting/CuSn20/diamond composites/feature structures/manufacturing process constraint分类
矿业与冶金引用本文复制引用
谢志平,何艺强,徐仰立,黄国钦,魏金权..激光选区熔化成形金刚石复合材料特征几何结构的工艺约束研究[J].金刚石与磨料磨具工程,2024,44(3):297-303,7.基金项目
国家重点研发计划(2021YFB3701800) （2021YFB3701800）
国家自然科学基金(52105445). （52105445）
