Leveraging CO2 laser cutting for enhancing fused deposition modeling (FDM) 3D printed PETG parts through postprocessing

IF 2.3 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Hashem Sabri, Omid Mehrabi, Mohammad Khoran, Mahmoud Moradi
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Abstract

In this study, the experimental investigation of the laser cutting process of polyethylene terephthalate glycol (PETG) sheets fabricated by the fused deposition modeling (FDM), was studied. The PETG sheets, with dimensions of 50 × 100 mm and thicknesses of 2.5, 5, and 7.5 mm, were fabricated using the FDM technique. Then, postprocessing laser cutting of the PETG sheets was undertaken by utilizing a 120-watt CO2 laser cutting. Response surface methodology was used to evaluate the influence of laser power (75–105 W), sheet thickness (2.5–7.5 mm), and cutting speed (4–10 mm/s) on the upper kerf width (UKW), lower kerf width (LKW), the ratio of UKW to LKW (ratio), and upper heat affected zone (HAZ) of the cutting kerf wall. The kerf wall was photographed byusing an optical microscope; and the kerf geometry dimension values were measured by ImageJ software. The results showed that all three parameters of sheet thickness, cutting speed, and laser power have impact on the kerf geometry characteristics. The reduction in the cutting speed and rise in the laser power increased the UKW and LKW, due to the increase in laser input heat. Furthermore, by increasing the sheet thickness and laser power and decreasing the cutting speed, the ratio decreased. Considering the minimum speed of 4 mm/s and maximum power of 105 W in the PETG sheet with a thickness of 7.5 mm, the highest values of the UKW and LKW were 336.6 and 582.2 μm, respectively. The HAZ decreased as power was reduced and speed was increased. The minimum HAZ value of 118 μm was achieved at a maximum speed of 10 mm/s with a sheet thickness of 7.5 mm.
利用二氧化碳激光切割技术,通过后处理提高熔融沉积成型 (FDM) PETG 3D 打印部件的性能
本研究对通过熔融沉积成型(FDM)技术制造的聚对苯二甲酸乙二酯(PETG)片材的激光切割工艺进行了实验研究。利用 FDM 技术制作了尺寸为 50 × 100 毫米、厚度为 2.5、5 和 7.5 毫米的 PETG 片材。然后,利用 120 瓦 CO2 激光切割机对 PETG 片材进行后处理激光切割。采用响应面方法评估了激光功率(75-105 瓦)、板材厚度(2.5-7.5 毫米)和切割速度(4-10 毫米/秒)对切割切口壁的上切口宽度(UKW)、下切口宽度(LKW)、UKW 与 LKW 之比(比值)和上热影响区(HAZ)的影响。使用光学显微镜对切口壁进行拍照,并使用 ImageJ 软件测量切口几何尺寸值。结果表明,板材厚度、切割速度和激光功率这三个参数对切口几何特征都有影响。由于激光输入热量的增加,切割速度的降低和激光功率的增加会增加 UKW 和 LKW。此外,通过增加板材厚度和激光功率以及降低切割速度,该比率有所下降。在厚度为 7.5 mm 的 PETG 片材中,考虑到最小速度为 4 mm/s,最大功率为 105 W,UKW 和 LKW 的最高值分别为 336.6 μm 和 582.2 μm。随着功率的降低和速度的增加,HAZ 有所下降。在最大速度为 10 mm/s、板材厚度为 7.5 mm 时,HAZ 的最小值为 118 μm。
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来源期刊
CiteScore
3.80
自引率
16.70%
发文量
370
审稿时长
6 months
期刊介绍: The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.
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