三头挤出成形氧化铝基陶瓷的精度研究  

Study on Accuracy of Alumina-based Ceramics Formed by Three-head Extrusion

作　　者：彭子伟 王寅成 杨力 樊自田[1] PENG Ziwei;WANG Yincheng;YANG Li;FAN Zitian(School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074)

机构地区：[1]华中科技大学材料科学与工程学院,武汉430074

出　　处：《中国机械工程》2024年第3期481-486,共6页China Mechanical Engineering

基　　金：国家自然科学基金(52205365,51775204,52275334)。

摘　　要：在自主构建的三头分层挤出成形装备的基础上,研究了单头挤出时挤出头直径d、挤出头移动速度v_(s)、挤出层高h对成形的氧化铝基陶瓷表面粗糙度及尺寸精度的影响;然后研究了双头和三头协同挤出时陶瓷坯体试样的配合精度。实验结果表明:单头挤出时,d为0.41 mm,v_(s)为10 mm/s,h/d为0.85条件下,陶瓷侧表面粗糙度较低(为24.423μm),尺寸偏差最小为0.67%;双头协同挤出成形时,双头定位配合误差为1.03%,侧表面尺寸粗糙度为30.671μm;三头协同挤出成形时,三头定位配合误差为1.15%,侧表面尺寸粗糙度为30.671μm。最后,采用双头与三头挤出成形工艺方法制备出氧化铝基陶瓷试样,验证了多头多材料协同挤出的可行性。On the basis of the self-built three-head layered extrusion equipment,the effects of extrusion head diameter d,extrusion head moving speed v_(s)and extrusion layer height h on the surface roughness and dimensional accuracy of formed ceramics were studied.Then matching accuracy of ceramic green body samples during double-head and three-head synergistic extrusion was studied.The experimental results show that when the single-end extrusiond is as 0.41 mm,v_(s)is as 10 mm/s,h/d is as 0.85,the roughness value of the ceramic side surface is as 24.423μm,and the minimum dimension deviation is as 0.67%.When the double-head cooperative extrusion was formed,the positioning error of the double-head is as 1.03%,and the side surface roughness value is as 30.671μm.When the three-head cooperative extrusion was formed,the positioning fit error of the three-head is as 1.15%,and the side surface roughness value is as 30.671μm.Finally,alumina-based ceramic samples were prepared by double-head and three-head extrusion,and the feasibility of multi-head and multi-material cooperative extrusion was verified.

关 键 词：三头挤出成形 氧化铝基陶瓷 多头协同 多材料 精度 

分 类 号：TB321[一般工业技术—材料科学与工程]