Research of Real-time Matching between Scanning Speed and Extrusion Speed for Extrusion Forming of 3D Printer
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摘要: 自由挤出成形（Extrusion free-forming，EFF）是对封装在料筒内的浆料施加外部载荷，迫使其通过微小流道挤出，并在X、Y平面上进行逐层堆积的3D打印增材制造技术。利用挤出成形技术可实现陶瓷制件的直接打印制造，打印过程中，成形平台在路径拐点处的光滑过渡、材料挤出速度与成形平台扫描速度的实时匹配是提高制件成形精度的重要方法之一。本文通过对依据扫描路径信息进行实时速度匹配算法的研究，建立了以STM32为核心，可以实现扫描速度预规划、挤出速度与扫描速度实时匹配的控制系统，从而为提高陶瓷制件成形精度提供一定借鉴价值。Abstract: Extrusion Free-forming (EFF) is a 3D printing additive manufacturing technology which applies external pressure to the slurry packaged in the cartridge, forcing it to squeeze through the micro flow channel, and stacking layer by layer on the X and Y planes. Direct manufacturing of ceramic parts can be achieved via extrusion forming technology, during the printing process, the smooth transition of the forming platform at the inflection point of the path, the extrusion speed of the material and the scanning speed of the forming platform is one of the important methods to improve the forming precision. Based on the speed matching algorithm and scan path information, a control system with STM32 as the core is established, which can pre-plan the scan speed, match the feed rate and scanning speed, so as to provide certain reference value for improving the forming precision of ceramic parts.
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Key words:
- 3D printing /
- extrusion forming /
- look-ahead control /
- speed matching
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表 2 并行串口1接收到的路径分析数据
路径1信息 匹配结果1 路径2信息 匹配结果2 位置坐标 X=0.360 0 mm 位置坐标 X=18.282 0 mm Y=0.360 0 mm Y=0.972 0 mm Z=1.000 0 mm Z=1.000 0 mm E=0.176 8 mm E=0.217 9 mm 打印距离:19.280 0 mm 柱塞进给距离:0.044 2 mm 打印距离:17.932 4 mm 柱塞进给距离:0.041 1 mm 拐点类型:2 拐点类型:3 打印速度:6.00 mm/s 进给速度:0.013 8 mm/s 打印速度:6.00 mm/s 进给速度:0.013 8 mm/s 初速度:0.00 mm/s 进给初速度:0.00 mm/s 初速度:1.4396 mm/s 进给初速度:0.003 3 mm/s 末(衔接)速度:0.00 mm/s 进给末速度:0.00 mm/s 末(衔接)速度:6.00 mm/s 进给末速度:0.013 7 mm/s 加速度:500 mm/s2 进给加速度:1.146 5 mm/s2 加速度:500 mm/s2 进给加速度:1.146 5 mm/s2 
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