Abstract: On the basis of the self-built three-head layered extrusion equipment，the effects of extrusion head diameter d， extrusion head moving speed vs 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, vs is as 10 mm/s, h/d is as 0.85, the roughness value of the ceramic side surface is as 24.423 μm, 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 30.671 μm. 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 30.671 μm. 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.

Key words: three-head extrusion, alumina-based ceramic, multi-head coordination, multi-material, accuracy

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vs、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，vs为10 mm/s，h/d为0.85条件下，陶瓷侧表面粗糙度较低(为24.423 μm)，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30.671 μm；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30.671 μm。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。

关键词: 三头挤出成形, 氧化铝基陶瓷, 多头协同, 多材料, 精度