Feature-Based Solid Model Reconstruction

Wang, Jun; Gu, Dongxiao; Gao, Zhanheng; Yu, Zeyun; Tan, Changbai; Zhou, Laishui

doi:10.1115/1.4023129

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…The RE framework generally adopted and commonly referred to in the literature [31][32][33] is based on the following six main phases: data capture, pre-processing, segmentation, feature classification, surfaces fitting and CAD model reconstruction. Several methodologies are available for each one of these phases and an in-depth analysis of these techniques is discussed in [19].…”

Section: Developed Cam Mechanisms Re Frameworkmentioning

confidence: 99%

Cam Mechanisms Reverse Engineering Based on Evolutionary Algorithms

2021

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Cam follower mechanisms are widely used in automated manufacturing machinery to transform a rotary stationary motion into a more general required movement. Reverse engineering of cams has been studied, and some solutions based on different approaches have been identified in the literature. This article proposes an innovative method based on the use of an evolutionary algorithm for the identification of a law of motion that allows for approximating in the best way the motion or the sampled profile on the physical device. Starting from the acquired data, through a genetic algorithm, a representation of the movement (and therefore of the cam profile) is identified based on a type of motion law traditionally used for this purpose, i.e., the modified trapezoidal (better known as modified seven segments). With this method it is possible to estimate the coefficients of the parametric motion law, thus allowing the designer to further manipulate them according to the usual motion planning techniques. In a first phase, a study of the method based on simulations is carried out, considering sets of simulated experimental measures, obtained starting from different laws of motion, and verifying whether the developed genetic algorithm allows for identifying the original law or approximating one. For the computation of the objective function, the Euclidean norm and the Dynamic Time Warping (DTW) algorithm are compared. The performed analysis establishes in which situations each of them is more appropriate. Implementation of the method on experimental data validates its effectiveness.

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Section: Developed Cam Mechanisms Re Frameworkmentioning

confidence: 99%

Cam Mechanisms Reverse Engineering Based on Evolutionary Algorithms

2021

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“…Reverse engineering is mainly used when technical documentation (such as technical drawings) is missing, especially in the case of old parts, when the technical documentation was not digitized or in the case of unique hand made parts, etc. The literature, [8][9][10][11][12] as well as industrial practice, offers many applying methods of reverse engineering. According to Buonamici et al, in, [13] after analyzing the literature, he deduced that most reverse engineering applications follow the same common steps (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Application of Reverse Engineering for Automotive Plastic Components – Case Study

Tămăşag

Beşliu

Dumitru

2021

Macromolecular Symposia

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The advancement in control and measuring technologies, the widespread acceptance and the growing popularity of the reverse engineering concept made the possibility of reproducing objects with unknown specifications an easier task. Although industrial practice offers many reverse engineering methods, this technology is not yet used at its fully potential. This article presents a case study involving the application of reverse engineering technology on a complex geometry plastic part from the automotive industry. The aim of the paper is to present a step‐by‐step reverse engineering method, starting from the creation of the point cloud obtained through scanning of the parts surfaces (using a 7.5 axis portable measuring arm with a laser line scanner) to the reproduction of the physical part.

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“…to extract the size parameters by the grid data [13][14][15]. Wang proposed the extraction of the characteristic parameters of bending, scanning, rotation, extrusion and setting out from the mesh grid, then completed the reconstruction of the entity model through the forward modeling, so as to ensure that the part model be editable [16]. However, since there is uncertain situations in transforming point clouds into the grid data, this method also leads to confusion of feature extraction, so that the models obtained by automatic processing are often inferior in accuracy, and manual intervention is required for correction.…”

Section: Introductionmentioning

confidence: 99%

A Primitive-Based Reverse Modeling Method for Obtaining the Editable CAD model of Reversed Parts

Jin¹,

Xiao-ling²,

Liu³

et al. 2020

Preprint

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By the traditional inversion methods, the model of the part reversed is obtained in mesh feature , which is hard to edit and redesign. In the paper, for the revised part, a modeling method to obtain the editable CAD mode was proposed. Firstly, an approach to construct the primitive structure tree used to describe the geometric structure of a part was proposed, by which the all the basic geometry primitives and their Boolean operations are logically arranged in tree format. Then, for each basic geometry primitive, a method to calculate the characteristics parameters and position and posture was proposed, which could be used to guide reversion measurement and modeling. For the basic primitives made of quadratic surface, a method for modeling the torus surface, whose model little research has been carried on, was proposed in which the torus surface equation is deduced by coordinate transformation method, has 8 independent parameters. Last, based on the guidance of primitive structure tree, a process for the characteristics parameters, minimum measuring points, forward modeling, positioning and assembly process was proposed, which could be used to direct measurements and to forward modeling. The example showed that the method proposed could be used to reverse the parts in the editable CAD model and provide for subsequent optimization design services.

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Feature-Based Solid Model Reconstruction

Cited by 15 publications

References 22 publications

Cam Mechanisms Reverse Engineering Based on Evolutionary Algorithms

Cam Mechanisms Reverse Engineering Based on Evolutionary Algorithms

Application of Reverse Engineering for Automotive Plastic Components – Case Study

A Primitive-Based Reverse Modeling Method for Obtaining the Editable CAD model of Reversed Parts

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