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金属微液滴竖直堆积成形工艺

李素丽, 杨来侠, 高扬, 徐超, 张文明, 卢秉恒

李素丽, 杨来侠, 高扬, 徐超, 张文明, 卢秉恒. 金属微液滴竖直堆积成形工艺[J]. 焊接学报, 2020, 41(2): 58-63. DOI: 10.12073/j.hjxb.20190524002
引用本文: 李素丽, 杨来侠, 高扬, 徐超, 张文明, 卢秉恒. 金属微液滴竖直堆积成形工艺[J]. 焊接学报, 2020, 41(2): 58-63. DOI: 10.12073/j.hjxb.20190524002
LI Suli, YANG Laixia, GAO Yang, XU Chao, ZHANG Wenming, LU Bingheng. Process of metal droplet upright accumulation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(2): 58-63. DOI: 10.12073/j.hjxb.20190524002
Citation: LI Suli, YANG Laixia, GAO Yang, XU Chao, ZHANG Wenming, LU Bingheng. Process of metal droplet upright accumulation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(2): 58-63. DOI: 10.12073/j.hjxb.20190524002

金属微液滴竖直堆积成形工艺

基金项目: 陕西省教育厅2019年度服务地方科学研究项目(19JC026)
详细信息
    作者简介:

    李素丽,1981年出生,博士,副教授;主要从事3D打印方面的教学和研究工作;发表论文50余篇;Email:563456137@qq.com

    通讯作者:

    杨来侠,博士,教授,博士研究生导师;Email:867368760@qq.com.

  • 中图分类号: TG441.1

Process of metal droplet upright accumulation

  • 摘要: 通过对金属微液滴竖直堆积行为的研究,探索不同成形工艺参数下,金属微液滴竖直搭接堆积、铺展形貌的变化规律,采用有限元模拟与试验验证相结合的方法,揭示金属微液滴在较大的温度梯度及较小的成形空间下竖直搭接堆积成形过程中,熔体喷射、堆积、搭接相互影响机制机理. 结果表明,在金属微液滴竖直堆积过程中,熔体加热温度、基板与喷头的距离、扫描速度、扫描路径等工艺参数都会对成形零件的表面精度和内部质量产生很大影响,因此其工艺的匹配性研究对于提高金属微液滴堆积成形的3D打印零件精度和质量有很大的理论和实际指导意义.
    Abstract: The vertical stacking behavior of metal micro droplet was studied to explore the vertical stacking and spreading morphology of metal micro droplet under different forming process parameters. The method of finite element simulation and experimental verification was used to reveal the metal droplet vertical under large temperature gradient and small forming space The results showed that heating temperature, distance between substrate and nozzle, scanning speed, scanning path and other technological parameters will have a great impact on the surface accuracy and internal quality of the formed parts in the vertical stacking process of metal micro droplet. Therefore, the research on the matching of the technology is of great theoretical and practical significance for improving the precision and quality of 3D printing parts with metal droplet stacking.
  • 图  1   堆积成形原理

    Figure  1.   Schematic diagram of metal droplet deposition

    图  2   竖直堆积过程示意图

    Figure  2.   Schematic diagram of vertical lap forming process

    图  3   计算机分析

    Figure  3.   Transient numerical simulation of droplet deposition spreading evolution. (a) 1 m/s; (b) 2 m/s; (c) 3 m/s

    图  4   微液滴堆积过程计算机分析及验证

    Figure  4.   Transient numerical simulation and experimental verification of droplet deposition spreading evolution. (a) 1 m/s; (b) 2 m/s; (c) 3 m/s

    图  5   不同堆积形式

    Figure  5.   Cross-section of three different lap spacing forming specimens. (a) insufficient accumulation; (b) ideal accumulation; (c) excessive accumulation

    图  6   HD关系示意图

    Figure  6.   HD relationship curves

    图  7   Td对多颗微液滴堆积影响示意图

    Figure  7.   Influent of Td. (1) 575 K; (2) 550 K; (3) 525 K

    图  8   hs对多颗微液滴堆积影响示意图

    Figure  8.   Influent of hs. (a) 15 mm; (b) 20 mm; (c) 25 mm

    图  9   不同参数下堆积的试件

    Figure  9.   Stacked samples with different parameters

    表  1   堆积试验相关工艺参数

    Table  1   Process parameters of sedimentary experiment

    熔体温度Td/K基板温度T/K基板距离hs/mm脉冲压力p/MPa脉冲频率f/Hz
    525,550,575 400 10 0.3 30
    下载: 导出CSV

    表  2   hs试验参数

    Table  2   Parameters hs of the deposition experiment

    熔体温度Td/K基板温度T/K基板距离hs/mm脉冲压力p/MPa脉冲频率f/Hz
    55040025,20,150.330
    下载: 导出CSV

    表  3   不同参数组合试验

    Table  3   Parameters of deposition experiment

    序号熔体温度Td/K基板温度T/K基板距离hs/mm脉冲压力p /MPa脉冲频率f/Hz
    (a) 550 400 10 0.3 30
    (b) 520 400 15 0.3 30
    (c) 500 400 20 0.3 30
    (d) 480 400 22 0.3 30
    (e) 475 400 25 0.3 30
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-05-23
  • 网络出版日期:  2020-07-12
  • 刊出日期:  2020-01-31

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