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一种新型智能工具可在制造过程中实时修正3D打印错误

一种新型智能工具可在制造过程中实时修正3D打印错误

传统 3D 打印多为开环控制:按预设 G 代码执行,过程中无法感知偏差,微小波动(温度 / 流速 / 速度)易导致层粘不牢、翘曲、错位、断裂,最终整件报废。新型智能工具本质是AI 闭环控制系统:用传感器 + 视觉 + LLM 实时监测、识别、自主调参修正,把 “事后报废” 变成 “事中自愈”。

美国研究人员近日展示了一种智能3D打印系统,能够实时检测并修复车辆和飞机用大型复合材料部件的制造缺陷。

这项技术本质上是一种自动控制器,用于监测复合材料3D打印过程,由美国能源部下属田纳西州橡树岭国家实验室的科学家打造。

据报道,这种智能工具集成了传感器和计算机视觉。橡树岭国家实验室团队相信,它能帮助美国制造商生产几乎无缺陷的大型定制部件,同时减少浪费、降低成本,并巩固美国在增材制造领域的领先地位。

橡树岭国家实验室高级研发研究员克里斯·维莱兹博士表示:“我们的控制器能感知正在发生的情况并实时做出反应,这一点颇具新意。它几乎像人类一样控制过程:通过观察并微调参数,直至达到理想结果。”

零缺陷复合材料打印

工程师使用大型工业3D打印机来制造庞大的物体,包括飞机部件、汽车保险杠、船体模具、集装箱和建筑墙体等。然而,这一过程对温度波动和打印速度十分敏感。

研究人员表示,即便是微小的变化,也可能削弱最终结构的强度,甚至毁掉整件打印品。为此,他们为机器人3D打印机配备了一组传感器和六台围绕打印喷嘴布置的小型热像仪。

新系统能够持续追踪喷嘴的移动、打印速度,以及热塑料复合材料在逐层冷却时的温度。它还采用了计算机视觉——一种使机器能够解读视觉数据的人工智能技术。

这意味着系统可以在制造过程中分析实时热图像。一旦检测到已沉积的材料冷却过快,或在添加下一层前温度过低,它便会自主微调打印速度,以确保最佳的打印条件。

更少的生产缺陷

为测试该系统,团队打印了一个比卡车轮胎还大的六边形结构。他们故意以较低速度启动打印,导致材料温度比理想温度低了约30%。控制器识别出问题后,自动提高了打印速度,并恢复了层间牢固粘合所需的正确温度。

参与该项目的田纳西大学研究生克里斯·奥布莱恩透露,该工具能检测并修正仅几摄氏度的温差。在他看来,这一点至关重要,因为温度变化是导致复合材料打印件报废的常见原因。

这项技术的一大优势在于,它无需针对每种新设计或几何形状重新进行训练,还能在不同的打印机、材料和物体形状上工作。维莱兹在新闻稿中总结道:“让这些机器更智能、反应更灵敏,有着巨大的发展空间。”

该系统整合了一个数字孪生,即利用机器学习创建的物理打印过程的虚拟副本。科学家可以借助它在工厂实际应用之前,安全地试验新材料和打印技术。

文章来源:知新了了

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  1. CONNECT:[ UseTime:0.000897s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000892s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000354s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000270s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000435s ]
  6. SELECT * FROM `set` [ RunTime:0.000203s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000500s ]
  8. SELECT * FROM `article` WHERE `id` = 667473 LIMIT 1 [ RunTime:0.000713s ]
  9. UPDATE `article` SET `lasttime` = 1779877006 WHERE `id` = 667473 [ RunTime:0.002339s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000711s ]
  11. SELECT * FROM `article` WHERE `id` < 667473 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001442s ]
  12. SELECT * FROM `article` WHERE `id` > 667473 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001017s ]
  13. SELECT * FROM `article` WHERE `id` < 667473 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002736s ]
  14. SELECT * FROM `article` WHERE `id` < 667473 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001807s ]
  15. SELECT * FROM `article` WHERE `id` < 667473 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002857s ]
0.207809s