多材料微流挤出3D打印喷头优化设计

周婧; 李迪; 平学成; 段国林

doi:10.13433/j.cnki.1003-8728.20220164

多材料微流挤出3D打印喷头优化设计

doi: 10.13433/j.cnki.1003-8728.20220164

周婧^1,,
李迪¹,
平学成¹,
段国林^2, ,

1.
天津科技大学机械工程学院，天津　300222
2.
河北工业大学机械工程学院，天津　300401

基金项目: 天津市自然科学基金项目（18JCQNJC75100）与天津市科技计划项目（18ZXRHGX0020）

详细信息

作者简介:
周婧（1983−），讲师，硕士生导师，研究方向为增材制造，机电一体化系统研究，zhoujing313@tust.edu.cn

通讯作者:
段国林，教授，博士生导师，glduan@hebut.edu.cn

中图分类号: TP23；TP331
计量
- 文章访问数: 71
- HTML全文浏览量: 39
- PDF下载量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2021-09-23
- 刊出日期: 2023-12-25

Optimization Design of Nozzle in 3D Printing of Multi-material Micro-flow Extrusion

1.
School of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China
2.
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China

摘要

摘要: 为了满足微流挤出工艺陶瓷3D打印机连续打印多材料以及均匀混合的要求，设计了变内径螺杆挤出式3D打印机挤出混料新结构，不仅可以实现高固含量浆料在喷头内部单向输送，同时通过变内径螺杆旋转搅拌使两种材料混合均匀。通过Ansys响应面优化，在挤出头段以最小压力实现最大面积加权平均速度为目标函数，实现在低功耗高输出的不同需求下匹配不同挤出速度；在螺杆段以优化最大剪切速率为目标函数，实现两种陶瓷浆料的均匀混合。结果表明，通过参数化优化后可以在螺杆低转速与小型化的要求下，实现不同小流率高精度打印及两种材料的均匀混合。
- 3D打印 /
- 变径螺杆挤出 /
- 多材料陶瓷打印 /
- 响应面优化 /
- 参数化设计
Abstract: In order to meet the requirements of continuous multi-material printing and uniform mixing of ceramic 3D printer by micro-flow extrusion, a new structure of extrusion mixing for 3D printer with variable inner diameter screw was designed. It can not only realize one-way transportation of slurry with high solid content inside the nozzle, at the same time, the two materials were mixed evenly by rotating and stirring the screw with variable inner diameter.Through Ansys response surface optimization, the objective function is to achieve the maximum area weighted average velocity at the extrusion head with the minimum pressure.The matching different extrusion speed under different demand of low power consumption and high outputis carried out. In the screw section, the optimum maximum shear rate was taken as the objective function to achieve the uniform mixing of the two ceramic pastes.The results show that the high precision printing with different small flow rates and the uniform mixing of the two materials can be realized under the requirements of low rotation speed and miniaturization of the screw.
- 3D printing /
- variable diameter screw extrusion /
- multi-material ceramic printing /
- response surface optimization /
- parameterized design

HTML全文

图 1 挤出机结构示意图

Figure 1. Schematic diagram of extruder structure

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图 2 陶瓷浆料运动分析

Figure 2. Ceramic slurry motion analysis

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图 3 变直径螺杆局部图

Figure 3. Part of a variable diameter screw

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图 4 不同固含量氧化锆陶瓷浆料的流变特性

Figure 4. Rheological properties of zirconia ceramic pastes with different solid content

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图 5 双锥角阶梯降压式数学模型

Figure 5. Doublecone Angle step-down mathematical model

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图 6 喷嘴直径与长度响应面

Figure 6. Nozzle diameter and length response surface

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图 7 中间段直径与长度响应面

Figure 7. Intermediate segment diameter and length response surface

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图 8 压缩角响应面

Figure 8. Response surface of compression angle

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图 9 响应面优化结果候选点

Figure 9. Candidate points of response surface optimization result

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图 10 壁面剪切应力

Figure 10. Wall shear stress

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图 11 Z方向剪切速率

Figure 11. Z-direction shear rate

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图 12 转速与最大剪切速率

Figure 12. Speed and maximum shear rate

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图 13 筒内径与螺距响应面

Figure 13. Response surface of cylinder inner diameter and pitch

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图 14 螺棱宽度与螺距响应面

Figure 14. Spiral edge width and pitch response surface

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图 15 筒内径与最大剪切速率

Figure 15. Tube inner diameter and maximum shear rate

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图 16 螺棱宽度与最大剪切速率

Figure 16. Spiral edge width and maximum shear rate

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图 17 螺距与最大剪切速率

Figure 17. Pitch and maximum shear rate

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