The isomorphic design and analysis of a novel plane-space polyhedral metamorphic mechanism

Wang, Rugui; Liao, Yijun; Dai, Jian S.; Chen, Huiqing; Cai, Ganwei

doi:10.1016/j.mechmachtheory.2018.09.017

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…The intra-rock planting hole is also able to contain more soil to improve survival rate of the sapling for forestry or even fruit tree. The variable diameters of the neck channel and intra-rock space demand a metamorphic structure for the new PDC digging bit (Wang R.G. et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

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Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

Luo

Chen

2021

INMATEH

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In the abandoned mine area with Karst landform in China, soils are few and thin but rocks are common, traditional planting hole diggers are unequal to work in rocks for vegetation restoration. A reamer bit with variable lateral drilling radius was designed based on the PDC (polycrystalline diamond compact) bit technology and metamorphic mechanism. Two lateral camber blades with PDC teeth were installed inside the bit body, a screw mechanism was employed as the actuation and a spatial double triangle mechanism was taken for the transmission. The curve of the camber blade was specially defined thus the reaming load was decentralized to 85.7% teeth on the blade. The kinematics of the lateral reamer bit was analysed, the mapping models from the actuation to the reaming radius and speed were established. Concrete samples were reamed indoors from 240mm to 407mm in diameter, the reaming cutting load and time length were measured and analysed. The lateral reamer bit was approved with the experiment results, this study provided equipment support for digging the planting hole in rocky abandoned mine areas and also expanded the PDC bit application.

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Section: Methodsmentioning

confidence: 99%

“…A lateral reamer bit for digging the planting hole in rocky abandoned mine area was designed based on the PDC bit technology (Huang Z.Q. et al, 2017) and metamorphic mechanism (Wang R.G. et al, 2019), the blade of the reamer bit was evolved from traditional type (Akbari et al, 2016) to a camber shape.…”

Section: Introductionmentioning

confidence: 99%

Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

Luo

Chen

2021

INMATEH

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“…as topological, geometrical and furcating morphings. Wang et al [7] introduced a novel plane-space polyhedral metamorphic mechanism that governed by the edge forming principle. Moreover, evolution principles and movement conditions of the isomorphic mechanism were analyzed.…”

Section: Introductionmentioning

confidence: 99%

An improved metamorphosis-based scheme of configuration synthesis for feed mechanism

Zhang

Liu

Yong-ju

2022

Preprint

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In this work, the principle of metamorphic mechanism is optimized for product design based on the variable topological structures. A metamorphic element consisting of kinematic pair and kinematic size is proposed firstly. A new configuration synthesis strategy for feed mechanism is performed in view of the translocation, inversion and duplication variation methods. The metamorphic elements are obtained by means of the decomposing the source metamorphic mechanism. A novelty configuration scheme based on constraint variation features is established by the solution of constraint relationship of metamorphic elements, and three kinds of configurations are synthesized. The comparisons of kinematic performances between source mechanism and new mechanism configurations are carried out using kinematic simulation. Results demonstrate that proposed strategy can synthesize successfully multiple types of the metamorphic mechanisms to meet the demands of functional targets.

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“…Therefore, metamorphic mechanisms have attracted many scholars since they were put forward. Reviewing the literature indicates that significant achievements have been made in diverse areas of metamorphic mechanisms, including design, [3][4][5][6] kinematics, [7][8][9][10] and topological structure, [11][12][13] providing appropriate references for the prototype design of metamorphic mechanisms. Especially, metamorphic robotic hand, 14 metamorphic multi-fingered hand, 15 metamorphic multi-legged robot, 16 discontinuousconstraint metamorphic mechanism, 17 metamorphic deployable grasping manipulator, 18 and metamorphic parallel manipulator 19 have been designed successfully.…”

Section: Introductionmentioning

confidence: 99%

Dynamic reliability analysis for configuration transformation of a controllable metamorphic palletizing robot

Chen

Wang

Dong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The dynamic reliability of configuration transformation is the key to ensure the normal operation of metamorphic mechanisms with multiple configurations in engineering applications. In this work, a controllable metamorphic palletizing robot for handling the workpieces was investigated. The failure function was established using the dynamic reliability model of its configuration transformation, where the uncertain variables were considered as probabilistic random and non-probabilistic interval variables. Next, a reliability analysis method used to determine and solve this function was proposed. The upper and lower failure function bounds were considered as probabilistic random variables enabling the calculation of the corresponding reliability. Regarding the case study, the reliability results of various configuration transformation types calculated via the presented method are close to those gained by the neural network-based Monte-Carlo method. Furthermore, in the experimental study, the measured data were obtained by the orthogonal design and fitted using a neural network. The reliability results show that the relative errors between the experimental results and those obtained through the proposed method are small, which suggests that the proposed method is effective. Therefore, this study provides an appropriate safety evaluation reference for the configuration transformation of metamorphic mechanisms.

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The isomorphic design and analysis of a novel plane-space polyhedral metamorphic mechanism

Cited by 13 publications

References 22 publications

Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

An improved metamorphosis-based scheme of configuration synthesis for feed mechanism

Dynamic reliability analysis for configuration transformation of a controllable metamorphic palletizing robot

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