A vibration-assisted method to reduce separation force for stereolithography

Jin, Jie; Yang, Jingfan; Mao, Huachao; Chen, Yong

doi:10.1016/j.jmapro.2018.03.052

Cited by 43 publications

(14 citation statements)

References 14 publications

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“…Third, the spring assisting mechanism has a lower cost than other proposed mechanisms [11]- [14] because the cost of adding a vibrating, fluid, or x-axis displacement mechanism far exceeds the manufacturing and energy consumption costs required for a spring mechanism. Moreover, the stability of the system during use and the cost of subsequent maintenance highlight the value of the spring assisting mechanism over other mechanisms.…”

Section: Discussionmentioning

confidence: 99%

“…Jin et al introduced a design with springs and motors to provide a series of vibrations during the separation process. The design can potentially reduce the normal force but may damage small or weak areas [14]. Most mechanisms proposed in the literature rely on a pulling-up process; however, information regarding the desired distance of lifting is lacking.…”

Section: A Separation Mechanismsmentioning

confidence: 99%

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Spring Assisting Mechanism for Enhancing the Separation Performance of Digital Light Process 3D Printers

Lin

Yang

2019

IEEE Access

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Separation has been a historic problem in digital light process 3D printing, which limits the capability of printing large areas. Over the years, methods for reducing separation force and improving printing quality have primarily relied on changing separation mechanisms and a constrained surface. Most methods require a pulling-up process; however, a few methods can provide the desired lifting distance by themselves. In our previous work, an in-house design named ''spring-assisted mechanism'' using the combination of spring with a tilting mechanism was proposed to adapt to different required separation forces. The spring compression can be used to provide an additional force for separation, which results in a shorter lifting distance when encountering different print areas. In this paper, we aim to investigate the separation performance by comparing the proposed mechanism with a conventional tilting mechanism. The Taguchi method is applied to study the importance of design features of the spring-assisted mechanism. The results indicate that the maximum separation force occurring in the spring-assisted mechanism declines significantly to 89%. An additional benefit of the proposed mechanism is that the lifting distance required for separation can be adjusted automatically to different print areas, and a sufficient separation force is very low. Consequently, this paper provides experimental evidence that the spring-assisted mechanism can be used for large-scale printing. INDEX TERMS DLP 3D printing, separation force, separation time, spring assisting mechanism, Taguchi method. YU-SHENG LIN received the B.Eng. degree from the Department of Mechanical Engineering, I-Shou University, the M.Sc. degree from the

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Section: Discussionmentioning

confidence: 99%

Section: A Separation Mechanismsmentioning

confidence: 99%

Spring Assisting Mechanism for Enhancing the Separation Performance of Digital Light Process 3D Printers

Lin

Yang

2019

IEEE Access

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“…Different AM technologies used to fabricate complex structures are extrusion based fused deposition method (FDM), selective laser melting (SLM), selective laser sintering (SLS), stereolithography (SLA), etc. 20,22,[28][29][30][31][32] The current study aims to cover modeling, mechanical properties, and vibration methods of PCS and metamaterials along with theoretical works. Emphasis is given on metamaterials through explaining the damping enhancement by such materials in details.…”

Section: Referencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances in mechanical metamaterials for vibration isolation: A review

Rifaie

Abdulhadi

Mian

2022

Advances in Mechanical Engineering

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The adverse effect of mechanical vibration is inevitable and can be observed in machine components either on the long- or short-term of machine life-span based on the severity of oscillation. This in turn motivates researchers to find solutions to the vibration and its harmful influences through developing and creating isolation structures. The isolation is of high importance in reducing and controlling the high-amplitude vibration. Over the years, porous materials have been explored for vibration damping and isolation. Due to the closed feature and the non-uniformity in the structure, the porous materials fail to predict the vibration energy absorption and the associated oscillation behavior, as well as other the mechanical properties. However, the advent of additive manufacturing technology opens more avenues for developing structures with a unique combination of open, uniform, and periodically distributed unit cells. These structures are called metamaterials, which are very useful in the real-life applications since they exhibit good competence for attenuating the oscillation waves and controlling the vibration behavior, along with offering good mechanical properties. This study provides a review of the fundamentals of vibration with an emphasis on the isolation structures, like the porous materials (PM) and mechanical metamaterials, specifically periodic cellular structures (PCS) or lattice cellular structure (LCS). An overview, modeling, mechanical properties, and vibration methods of each material are discussed. In this regard, thorough explanation for damping enhancement using metamaterials is provided. Besides, the paper presents separate sections to shed the light on single and 3D bandgap structures. This study also highlights the advantage of metamaterials over the porous ones, thereby showing the future of using the metamaterials as isolators. In addition, theoretical works and other aspects of metamaterials are illustrated. To this end, remarks are explained and farther studies are proposed for researchers as future investigations in the vibration field to cover the weaknesses and gaps left in the literature.

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“…为了克服上述工艺缺陷, 国内外许多学者进行了大量研究 [15~19] . Huang等人 [10] 提出延长固化时间提高固化层与打印托板之间的强度; Jin等人 [15] 提出一种振动辅助的方法; 德国EnvisionTEC公司开发了Perfac-tory系统, 该系统通过倾斜树脂槽的方式将固化层与约束基底分离形式由面分离转化为线分离 [16,17] ; 美国南加州大学的Zhou等人 [18,19] :…”

Section: 连续液面成型工艺中约束基底微观特征对阻聚气体传质行为的影响unclassified