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
彭子伟 1王寅成 1杨力 1樊自田1
作者信息
- 1. 华中科技大学材料科学与工程学院,武汉,430074
- 折叠
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.
Abstract
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.
关键词
三头挤出成形/氧化铝基陶瓷/多头协同/多材料/精度Key words
three-head extrusion/alumina-based ceramic/multi-head coordination/multi-materi-al/accuracy引用本文复制引用
基金项目
国家自然科学基金(52205365)
国家自然科学基金(51775204)
国家自然科学基金(52275334)
出版年
2024
国家科技期刊平台
NSTL
万方数据