皮秒激光切割AFRP复合材料实验研究

杨剑; 张瑞; 赵煜; 杜婷婷; 叶云霞

doi:10.13801/j.cnki.fhclxb.20210426.002

皮秒激光切割AFRP复合材料实验研究

doi: 10.13801/j.cnki.fhclxb.20210426.002

杨剑^{1, 2,},
张瑞^2,,
赵煜^{1, 2,},
杜婷婷^{1, 2},
叶云霞^{1, 2, ,}

1.
江苏大学　微纳光电子与太赫兹技术研究院，镇江 212013
2.
江苏大学　机械工程学院，镇江 212013

基金项目: 装备预先研究项目(61409230314)；镇江市重点研发计划(GY2019005)；江苏省重点研发产业前瞻项目(BE2020037)

详细信息

通讯作者:
叶云霞，博士，教授，硕士生导师，研究方向为激光精密加工　E-mail： yeyunxia@ujs.edu.cn

中图分类号: TN249
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-15
- 修回日期: 2021-03-22
- 录用日期: 2021-04-18
- 网络出版日期: 2021-04-26
- 刊出日期: 2022-01-15

Experimental study on picosecond laser cutting AFRP composites

YANG Jian^{1, 2
,},
ZHANG Rui^2
,,
ZHAO Yu^{1, 2
,},
DU Tingting^{1, 2},
YE Yunxia^{1, 2
, ,}

1.
Institute of Micro-Nano Optoelectronic and Terahertz Technology, Jiangsu University, Zhenjiang 212013, China
2.
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

摘要

摘要: 采用紫外皮秒激光( λ=355 nm)、绿光皮秒激光( λ=532 nm)和红外皮秒激光( λ=1064 nm)的三波长皮秒脉冲固体激光器，对1 mm厚芳纶纤维增强树脂基复合材料(Aramid fiber reinforced polymer，AFRP)进行单次扫描切割实验，用光学显微镜(OM)和SEM测量了上切缝宽度、切缝深度和上表面热影响区宽度，并计算了切缝锥度，分析了激光波长、功率及扫描速度等参数对切口形貌和切缝质量的影响。结果表明：相比于红外激光和绿光激光切割AFRP，紫外激光的切割效率更高，切割质量更好；上切缝宽度、切缝深度和上表面热影响区宽度随着激光功率的增大而增大，随着激光扫描速度的增大而减小；切缝锥度随着激光功率的增大而减小，随着激光扫描速度的增大而增大；适当降低激光扫描速度，有利于提高切缝深宽比。
- 皮秒激光 /
- 波长 /
- 激光切割 /
- 切缝质量 /
- AFRP
Abstract: A three wavelength picosecond pulsed solid-state laser with ultraviolet picosecond laser ( λ=355 nm), green picosecond laser ( λ=532 nm) and infrared picosecond laser ( λ=1064 nm) was used to cut 1 mm thick aramid fiber reinforced polymer (AFRP) by a single pass scanning. The slit width, thickness and thickness were measured by optical microscope (OM) and scanning electron microscope (SEM). The effects of laser wavelength, laser power and scanning speed on the notch shape and quality were analyzed. The results show that: compared with the infrared laser and green laser cutting AFRP, the cutting efficiency of ultraviolet laser is higher, and the cutting quality is better; the width of upper slit, slit depth and the width of upper surface heat affected zone increase with the increase of laser power, and decrease with the increase of laser scanning speed; the slit taper decreases with the increase of laser power, and increases with the increase of laser scanning speed. When the laser scanning speed is reduced properly, the ratio of slit depth to width is improved.
- picosecond laser /
- wavelength /
- laser cutting /
- kerf quality /
- AFRP

HTML全文

图 1 脉冲激光切割系统原理示意图与实物图

Figure 1. Schematic diagram and physical drawing of punching laser cutting system

AFRP—Aramid fiber reinforced polymer

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图 2 上切缝宽度( K)和上表面热影响区宽度( W)测量

Figure 2. Measurement of the upper kerf width ( K) and upper surface heat- affected zone width ( W)

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图 3 切缝深度( H)测量

Figure 3. Measurement of kerf depth ( H)

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图 4 三个波长下芳纶纤维增强树脂基复合材料(AFRP)切缝微观形貌图片

Figure 4. Micrographs of aramid fiber reinforced polymer (AFRP) slit at three wavelengths

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图 5 1 mm厚环氧树脂板 ^{[
13]}和0.5 mm厚AF织物 ^{[
14]}的FTIR图谱

Figure 5. FTIR spectra of 1 mm thick epoxy resin board ^{[
13]} and 0.5 mm thick AF fabric ^{[
14]}

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图 6 AF和环氧树脂的分子结构

Figure 6. Molecular structure of AF and epoxy resin

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图 7 AF排布方向对切缝宽度的影响

Figure 7. Effect of AF arrangement direction on slit width

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图 8 AFRP对紫外激光、绿光和红外激光的吸收机制

Figure 8. Absorption mechanism of ultraviolet laser, green laser and infrared laser by AFRP

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图 9 功率为25 W时三种波长下AFRP切缝截面

Figure 9. Cross section of AFRP kerf under three wavelengths at 25 W power

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图 10 功率25 W时三种波长下AFRP切缝参数随切割速度变化

Figure 10. Variation of AFRP kerf parameters with cutting speed under three wavelengths at 25 W power

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图 11 波长为532 nm时不同扫描速度下AFRP的热影响区

Figure 11. Heat affected zone at 532 nm with different scanning speed of AFRP

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图 12 波长为355 nm时不同功率下的AFRP切缝截面

Figure 12. Cross section of AFRP kerf obtained with 355 nm

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图 13 AFRP切缝特征参数随功率变化

Figure 13. Variation of kerf parameters with power of AFRP

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图 14 波长为355 nm时不同功率下AFRP的热影响区

Figure 14. Heat-affected zone with different power at 355 nm of AFRP

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表 1 材料热学性能参数

Table 1. Thermal properties of materials

Property	Kevlar-29	Epoxy resin
Decomposition temperature/K	800	440
Heat conductivity/(W·m ⁻¹·K ⁻¹)	0.04	0.1
Specific heat capacity/(J·kg ⁻¹·K ⁻¹)	1400	1 884
Density/(kg·m ⁻³)	1440	1100

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表 2 激光器参数

Table 2. Laser parameters

Options	Average power/W	Repetition rate/kHz	Pulse duration/ps	Focus diameter/μm
UV laser	0-25	500	15	50-60
GN laser	0-45	500	15	35-40
IR laser	0-90	500	15	25-30

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