Ontology-based modeling of part digital twin oriented to assembly

The digital twin concept, as a widely accepted philosophy for a new generation of digital manufacturing research, plays a significant role in the Industry 4.0 era. As the prerequisite for in-depth application of digital manufacturing in assembly, the collecting, modeling and utilizing approach for historical data of machining process and inspection of part appear to be important to provide data support for integral manufacturing scenarios. However, the modeling approach to part digital twin is not comprehensive due to the structural heterogeneity of data, which hampers the real-time simulation and adjustment in assembly process. Therefore, a method of part digital twin modeling oriented to assembly is proposed in this article. The designing information of a part is obtained from a three-dimensional model with the model-based definition approach, while machining features are pre-defined and identified. Moreover, the assembly constrain relationships in the assembly unit that the part participate in are obtained, on account of which deviation transfer analysis can be accomplished, and key assembly features are filtered to be the carrier of processing and inspection data. An assembly-oriented part digital twin framework is constructed to demonstrate the main components and dataflow in creating a digital twin with information filtering and subsequent management. In addition, a case study is illustrated to show the entire process of part digital twin modeling and proves the practicality and efficiency of the method proposed.

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Research on the Variable Ratio Gear Modeling and Transmission Ratio Test Method of Rack and Pinion Variable Ratio Steering Gear

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.721.157 ◽

2014 ◽

Vol 721 ◽

pp. 157-161

Author(s):

Zi Ru Niu ◽

Gang Yan Li ◽

Shun Zeng ◽

Tian Li Yan ◽

Si Yu Zhang ◽

...

Keyword(s):

Three Dimensional ◽

Modeling Method ◽

Test Method ◽

Machining Process ◽

Transmission Ratio ◽

Ratio Test ◽

Variable Ratio ◽

Three Dimensional Model ◽

Ratio Curve ◽

Related Test

A new modeling method for the variable ratio gear of the rack and pinion variable ratio steering gear was proposed in this paper. It was based on the characteristic that variable ratio gear pair meshing tooth profile surface are the envelope surface of each other and established a variable ratio gear three-dimensional model by simulating the gear machining process in CATIA and using Boolean subtraction operation. According to the related test standard of the variable ratio steering gear transmission ratio, a test bench was design and build, and the correctness of this modeling method was verified by comparing the designed variable ratio curve and the steering gear sample designed and processed by this method.

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Thermal Performance Analysis for High-Speed Spindle of Horizontal Machining Center

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.179-180.298 ◽

2011 ◽

Vol 179-180 ◽

pp. 298-303

Author(s):

Zhi Feng Liu ◽

Zhong Hua Chu ◽

Qiang Cheng ◽

Guang Bo Liu

Keyword(s):

Heat Generation ◽

Thermal Performance ◽

High Speed ◽

Three Dimensional ◽

Stable Condition ◽

Machining Process ◽

Analysis Model ◽

Three Dimensional Model ◽

Element Analysis ◽

Radiation Mechanism

In order to show the thermal performance of spindle by rule and line, firstly, this paper presents a three-dimensional finite element analysis model for thermal analysis of high speed spindle; Then by studying the heat generation and radiation mechanism of the spindle, temperature distribution has been analyzed accurately and intuitively under the heat-stable condition based on the three-dimensional model; Finally effective actions have been proposed to improve the condition of the spindle's heat generation, and thus can guarantee the highly effective characteristic of the spindle in machining process.

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Studies on Process Information Expression Techniques of 3D CAPP

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.121-126.2258 ◽

2011 ◽

Vol 121-126 ◽

pp. 2258-2262

Author(s):

Jiang Yong Wang ◽

Rong Mo

Keyword(s):

Integration Method ◽

Three Dimensional ◽

Machining Process ◽

Prototype System ◽

Dimensional Model ◽

Three Dimensional Model ◽

Process Information ◽

The Status ◽

Structure Tree ◽

Processing Information

In allusion to the status of the expression and integration technology of the three-dimensional CAPP processing information, a machining process information expression and integration method was put forward, which was process-oriented and based on the three-dimensional model of products. The machining process object was represented by the processing structure tree, and the processing information was expressed and collected in the three-dimensional situation. Finally，a prototype system was developed to illustrate the feasibility and validity of the proposed method.

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Research of Rapid Assembly for Standard Parts of Three-Dimensional Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.591-593.280 ◽

2012 ◽

Vol 591-593 ◽

pp. 280-283

Author(s):

Jing Zhang ◽

Fa Ping Zhang ◽

Xiao Feng Duan ◽

Bo Gao ◽

Juan Han

Keyword(s):

Design Process ◽

Three Dimensional ◽

Light Weight ◽

Dimensional Model ◽

Automatic Determination ◽

Three Dimensional Model ◽

Assembly Design ◽

Assembly Features ◽

Assembly Constraints

In the assembly design process of aircraft products, plenty used standard parts make it boring and difficult to extract assembly features and assembly constraints between the products and standard parts.Therefore,in this paper, the practical methodology for light-weight of the tree-dimensional model for rapid assembly and the automatic determination for specification of the parts are proposed. Eventually the assembly for the standard parts can be implemented rapidly, intelligently, in batch, and automatically.

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Study on Nanometric Machining Process of Monocrystalline Si

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.315-316.792 ◽

2006 ◽

Vol 315-316 ◽

pp. 792-795 ◽

Cited By ~ 4

Author(s):

Yu Lan Tang ◽

Ying Chun Liang ◽

D.X. Wang ◽

J.W. Zhao

Keyword(s):

Phase Transformation ◽

Surface Energy ◽

Potential Function ◽

Amorphous Phase ◽

Elastic Recovery ◽

Three Dimensional ◽

Machining Process ◽

Three Dimensional Model ◽

Machined Surface ◽

Nanometric Machining

A three-dimensional model of molecular dynamics (MD) was employed to study the nanometric machining process of Si. The model included the utilization of the Morse potential function and the Tersoff potential function to simulate the interatomic force between atoms. By analysis of snapshots and local radial distribution function (RDF) during the various stages of the cutting process, amorphous phase transformation of chip and machined surface are observed, but no phase transformation of bulk. Chip volume change is observed due to the amorphous phase transformation. Dislocations around the tool and elastic recovery of the machined surface do not appear. The effects of surface adsorption on machined surface state have been studied on the basis of surface energy and surfaces hardness. Surface energy decreases and hardness increases by adsorption. Oxygen atoms adsorbed are on the machined surface and subsurface region.

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Research on Machining Knowledge Base for Numerical Control System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.271-272.1628 ◽

2012 ◽

Vol 271-272 ◽

pp. 1628-1631

Author(s):

Fei Xue ◽

Xiao Feng Zhang

Keyword(s):

Knowledge Base ◽

Three Dimensional ◽

Numerical Control ◽

Machining Process ◽

Sql Server ◽

Three Dimensional Model ◽

Numerical Control Machining ◽

Server Software ◽

Increase Productivity ◽

Design Software

According to the rapid and efficient requirement of numerical control machining process, a machining knowledge base is developed by building the parameterized models based on the Pro/Engineering three-dimensional design software, using the Visual C++. NET and Microsoft SQL Server software as knowledge base background server. Because of the renewable, large capacity, and three-dimensional model characteristics, the machining knowledge base has the ability of reducing tool stock and preserving optimized parameters, which greatly increase productivity and decrease manufacturing costs.

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Combining Integrated Informative System and Historical Digital Twin for Maintenance and Preservation of Artistic Assets

Sensors ◽

10.3390/s21175956 ◽

2021 ◽

Vol 21 (17) ◽

pp. 5956

Author(s):

Adriana Marra ◽

Salvatore Gerbino ◽

Alessandro Greco ◽

Giovanni Fabbrocino

Keyword(s):

Dynamic Properties ◽

Three Dimensional ◽

Laser Scanner ◽

Rational Approach ◽

Three Dimensional Model ◽

Stress Regime ◽

Novel Technologies ◽

Digital Twin ◽

Artistic Assets ◽

Artistic Heritage

The protection of artistic and cultural heritage is a major challenge due to its peculiarities and its exposure to significant natural hazards. Several methodologies exist to assess the condition of artistic heritage and to protect it from exceptional actions. Moreover, novel digital technologies offer many solutions able to deliver a digital replica of artifacts of interest, so that a reduction in the uncertainties in the analysis models can be achieved. A rational approach to the preservation and protection of artistic heritage is based on traditional approaches supported and integrated by novel technologies, so that qualitative and quantitative indicators of the current condition of artistic heritage can be defined and validated in an interdisciplinary framework. The present paper reports the results of an approach to the maintenance and preservation of art objects housed in a museum complex based on a comprehensive digital path towards a Historical Digital Twin (HDT). A workflow aimed at estimating the stress regime and the dynamic properties of two sculptures, based on the detailed three-dimensional model resulting from a laser scanner survey, is illustrated and discussed. The results highlight the great advantages resulting from the integration of traditional and novel procedures in the field of conservation of artistic assets.

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