Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process

Liu, Huixia; Li, Jianwen; Shen, Zongbao; Qi, Qian; Zhang, Hongfeng; Wang, Xiao

doi:10.3390/mi6080969

Cited by 13 publications

(3 citation statements)

References 17 publications

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“…As shown in Figure 9 c, the elastic wave is almost chased. So, if the elastic wave traveled for a longer distance, the elastic wave would finally catch up [ 18 , 25 ]. This indicates that when thicker silica gel was used, meaning that the elastic wave tended to travel for a longer distance, the compound process was delayed or hindered in this case.…”

Section: Resultsmentioning

confidence: 99%

“…Wang et al [ 17 ] used the rubber as a soft punch to fabricate micro-parts with a forming/blanking die on pure copper and titanium sheets and good results were obtained from the experiment. Liu et al [ 18 ] combined laser shock waves with rubber to fabricate micro-gears including piercing and blanking based on experimental and simulated research, and discussed process parameters such as laser energy, soft punch properties and blank-holder force on the quality of micro-gears.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Dish-Shaped Micro Parts by Laser Indirect Shocking Compound Process

et al. 2016

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Compound process technology has been investigated for many years on a macro scale, but only a few studies can be found on a micro scale due to the difficulties in tool manufacturing, parts transporting and punch-die alignment. In this paper, a novel technology of combining the laser shock wave and soft punch was introduced to fabricate the dish-shaped micro-parts on copper to solve these difficulties. This compound process includes deep drawing, punching and blanking and these processes can be completed almost at the same time because the duration time of laser is quite short, so the precision of the micro-parts can be ensured. A reasonable laser energy of 1550 mJ made the morphology, depth of deformation, dimensional accuracy and surface roughness achieve their best results when the thickness of the soft punches was 200 μm. In addition, thicker soft punches may hinder the compound process due to the action of unloading waves based on the elastic wave theory. So, the greatest thickness of the soft punches was 200 μm.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of Dish-Shaped Micro Parts by Laser Indirect Shocking Compound Process

et al. 2016

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“…In that process, low impedance medium flexible rubber was utilized as a soft punch, placed between the thin metal sheet and the black paint to protect the workpiece surface from being ablated. Liu et al applied laser shock punch to fabricate micro-gears [ 6 ] and dish-shaped micro-parts [ 7 ], and found that soft punch with 200 µm in thickness is beneficial to homogenize energy and propagate the shock wave. It also has been found that the soft punch is favorable for increasing formability of the mental foils during the µLDFF, and the soft punch can easily separate from the workpiece after the forming process without excessive force [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Micro-Bending of Sheet Metal Laminates by Laser-Driven Soft Punch in Warm Conditions

et al. 2017

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Microscale laser dynamic flexible forming (µLDFF) is a novel ultrahigh strain rate manufacturing technology with high efficiency and low cost. However, the µLDFF is just confined to single-layer foil at present. In this work, sheet metal laminates (Cu/Ni) were selected as the experimental material for its excellent mechanical and functional properties, and a new micro-bending method of sheet metal laminates by laser-driven soft punch was proposed in warm conditions. The micro-mold and warm platform were designed to investigate the effects of temperature and energy on formability, which were characterized by forming accuracy, surface quality, element diffusion, and so on. The experimental results show that the forming accuracy and quality increased first and then decreased with laser energy, but the hardness increased consistently. In warm conditions, the fluidity of material was improved. The forming depth and accuracy increased for the relieved springback, and the surface quality increased first and then decreased. The tensile fracture disappeared with temperature for the decreased hardness and thinning ratio, and the element diffusion occurred. Overall, this study indicates that the formability can be improved in warm conditions and provides a basis for the investigation of micro-bending of sheet metal laminates by µLDFF in warm conditions.

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Experimental investigation on the formation behavior for three-layer metal sheets under laser high speed flexible micro-forming

Zhang

Liu

Shen

et al. 2017

Int J Adv Manuf Technol

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Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process

Cited by 13 publications

References 17 publications

Fabrication of Dish-Shaped Micro Parts by Laser Indirect Shocking Compound Process

Fabrication of Dish-Shaped Micro Parts by Laser Indirect Shocking Compound Process

Investigation of Micro-Bending of Sheet Metal Laminates by Laser-Driven Soft Punch in Warm Conditions

Experimental investigation on the formation behavior for three-layer metal sheets under laser high speed flexible micro-forming

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