China Mechanical Engineering ›› 2024, Vol. 35 ›› Issue (03): 481-486.DOI: 10.3969/j.issn.1004-132X.2024.03.010

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

PENG Ziwei;WANG Yincheng;YANG Li;FAN Zitian   

  1. School of Materials Science and Engineering,Huazhong University of Science and Technology,
    Wuhan,430074

  • Online:2024-03-25 Published:2024-04-23

三头挤出成形氧化铝基陶瓷的精度研究

彭子伟;王寅成;杨力;樊自田   

  1. 华中科技大学材料科学与工程学院,武汉,430074

  • 通讯作者: 樊自田(通信作者),男,1962年生,教授、博士研究生导师。研究方向为3D打印快速铸造技术与装备、铝镁合金材料及其精密铸造技术等。E-mail:fanzt@hust.edu.cn。
  • 作者简介:彭子伟,男,2000年生,硕士研究生。研究方向为基于分层挤出技术的氧化锆基陶瓷与铁基金属的界面结合机理。
  • 基金资助:
    国家自然科学基金(52205365,51775204,52275334)

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

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