Study on Accuracy of Alumina-based Ceramics Formed by Three-head Extrusion
On the basis of the self-built three-head layered extrusion equipment,the effects of ex-trusion 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 ce-ramic 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 24.423μm,and the minimum dimen-sion 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 30.671 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.
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