Research on Model Reconstruction and NC Machining for Blade Based on Reverse Engineering

2012 ◽  
Vol 591-593 ◽  
pp. 670-673
Author(s):  
Yu Qing Zhou
Keyword(s):  
Reverse Engineering ◽  
Nc Machining ◽  
Model Reconstruction ◽  
Cloud Data ◽  
Nc Code ◽  
Cad Cam ◽  
Main Components ◽  
Object Of Study ◽  
Geomagic Software ◽  
Manufacturing Time

CAD/CAM techniques together with NC machining allow to reduce products manufacturing time and costs. The aim of this paper is to present a brief overview of reverse engineering as a necessary phase which provides benefits to the design and production processes in advance. Taking blades as object of study, one method is proposed to improve the design efficiency for blades model reconstruction and NC machining. The process consists of three main components: 3D optical digitizing, model reconstruction and NC machining. First of all, point cloud data acquisition is made through camera type 3D scanner, and the data pre-processing is made by Geomagic software, then it is imported in CATIA software for model reconstruction and generating NC code. Results show that this method can improve the efficiency of blades model reconstruction.

Computation and Simulation of 5-Axis Cutter Based on Scattered Point Cloud Data

2012 ◽  
Vol 602-604 ◽  
pp. 1740-1743
Author(s):  
Wen Hui Zhao ◽  
She Liu
Keyword(s):  
Reverse Engineering ◽  
Distance Function ◽  
Point Cloud ◽  
Complex Surface ◽  
Conjugate Problem ◽  
Local Feature ◽  
Conjugate Points ◽  
B Spline ◽  
Cloud Data ◽  
Cad Cam

The complex surface is modeled by triangular surface, B-spline or non-uniform rational B-spline first and then the planing of the cutter is followed in reverse engineering. But this require CAD/CAM software and operator’s experiene. Because of this，the research on direct NC cutter generation from point cloud have become the focus of research in reverse engineering. The normal，curvature，surface vary et al parameters are calculated by principle component analysis method and so on, which define the local feature of the surface hidden in the point cloud. Then，based on local feature，point cloud is simplified. It is proved that two points with minimal orientation-distance on a pair of smooth surfaces are conjugate points. Thus the conjugate problem between the tool surface and the part surface is converted into optimization process of orientation-distance function. The cutter trace and the cutter interference are achieved by local and global optization of the orientation-distance function.

Application of the Reverse Engineering to 3D Reconstruction on a Denture

2012 ◽  
Vol 490-495 ◽  
pp. 2032-2036
Author(s):  
Lei Zhang ◽  
Heng Wang ◽  
Hai Li Xu
Keyword(s):  
Reverse Engineering ◽  
Noise Suppression ◽  
Model Reconstruction ◽  
Contact Mode ◽  
Reconstruction Process ◽  
Cloud Data ◽  
Surface Patches ◽  
3D Model Reconstruction ◽  
Engineering Technique ◽  
Surface Data

In this paper, 3D model reconstruction on a denture that has undergone the run-in time is studied, using reverse engineering technique. In the stage of surface data acquisition, since the denture has very complicated and irregular contour, a non-contact mode is preferred. In point cloud data pre-processing, salient outliers are manually removed; Gaussian filter is used for noise suppression; curvature-based sampling is adopted for data reduction. In the model reconstruction stage, the surface reconstruction which is based on enclosed triangular Bezier surface patches is used for it can deal with arbitrary shape contours. Then, hole patching, smoothing and reduction are added for refinement of the surface creation. At last, the errors of the whole reconstruction process are measured and evaluated. The results indicate that our reverse engineering work has good performance, which can bring about comfortableness for the use of future dentures by patients.

The Design of Injection Mold for the Handset Based on Reverse Engineering

2012 ◽  
Vol 591-593 ◽  
pp. 219-222
Author(s):  
Huai Xing Wen ◽  
Qian Xin Wei
Keyword(s):  
Reverse Engineering ◽  
Rapid Development ◽  
Three Dimensional ◽  
Injection Mold ◽  
Engineering Technology ◽  
Cloud Data ◽  
Important Trend ◽  
Cad Cam ◽  
Point Data ◽  
Physical Profile

With the rapid development of advanced industrial technology and computer technology, using the reverse engineering to mold and simulate for products has already been an important trend in the modern product design, and it has also been an important technology in the CAD/CAM field, especially the field of the molding design. The article took telephone handset as an example, the point cloud data of the physical profile was done by the three-dimensional laser scan using the reverse engineering technology. The handset 3-D mold was given in Pro/E by the point-data processing, the curve and surface constructing. Finally the handset injection mold was designed. The study result shows that using reverse engineering to achieve the design of injection mold can not only effectively reduce the cycle of mold design, but reduce design cost.

A Framework for Three Dimensional Solid Model Reconstruction

2006 ◽  
Author(s):  
Chandresh Mehta ◽  
Thenkurussi Kesavadas
Keyword(s):  
Surface Reconstruction ◽  
Point Cloud ◽  
Solid Model ◽  
Point Cloud Data ◽  
Model Reconstruction ◽  
Detection Scheme ◽  
Cloud Data ◽  
Cad Cam ◽  
Measuring Machine ◽  
3D Solid

3D object construction by reverse engineering falls into two categories: surface reconstruction and solid model reconstruction. The 3D surface reconstruction techniques are intended to extract only the geometric information from the measured point cloud and are commonly used in computer graphics and computer vision, whereas the 3D solid model reconstruction techniques are expected to extract the geometric as well as the topological information from the measured point cloud and has application in the field of CAD/CAM. This paper presents a novel framework for 3D solid model reconstruction, which will enable reconstruction of a B-rep model of a physical object based on the 3D point cloud data captured from the surface of the object. In this framework, we use a magnetic position sensor for measuring the data from the surface of the object. This has numerous advantages over conventional methods of data acquisition that use laser scanner or coordinate measuring machine. For segmenting the measured point cloud data into sub-regions, a non-iterative region growing algorithm is developed and implemented. Our surface detection scheme is based on a Modified Gaussian image (MGI) of the sub-region and least-square techniques are used for fitting a surface to the points in a sub-region. The reconstructed B-Rep model is stored in an ISO 10303 (STEP) file format so that it can be imported in to standard CAD/CAM systems for future modifications or analysis.

Reverse Modeling of Auto Part Reconstruction Based on CATIA

2012 ◽  
Vol 159 ◽  
pp. 253-256
Author(s):  
Yu Qing Zhou
Keyword(s):  
Point Cloud ◽  
Complex Surface ◽  
Model Reconstruction ◽  
Engineering Model ◽  
3D Scanner ◽  
Auto Part ◽  
Low Efficiency ◽  
Object Of Study ◽  
Geomagic Software ◽  
Part Model

Abstract: In the light of the problem of low efficiency in reverse engineering model reconstruction, taking Auto part as object of study, analysis the key technology in this paper. One method is proposed to improve the design efficiency for Auto part model reconstruction. First of all, point cloud is acquired by camera style 3D scanner and processed by Geomagic software; then it is imported to CATIA software for Parameters reproduction and model reconstruction. Results show that this method can improve the efficiency of Auto part model reconstruction, and provide one workable way for CAD model reconstruction with complex surface.

A Multi-Sensor Approach for Rapid Digitization and Data Segmentation in Reverse Engineering

1999 ◽  
Vol 122 (4) ◽  
pp. 725-733 ◽  
Author(s):  
V. H. Chan ◽  
C. Bradley ◽  
G. W. Vickers
Keyword(s):  
Reverse Engineering ◽  
Laser Scanner ◽  
Ccd Camera ◽  
Target Object ◽  
Engineering System ◽  
Major Step ◽  
Cloud Data ◽  
Surface Patches ◽  
Cad Cam ◽  
Manufacturing Applications

The development of a fully automated reverse engineering system currently faces two challenges; the time consuming digitization of the object due to the multi-view requirement of current industrial sensors and the conversion of copious amounts of 3-D cloud data into a compact form, compatible with CAD/CAM packages. An ideal reverse engineering system will automatically digitize the object from multiple viewpoints, segment the cloud data into constituent surface patches and generate an accurate solid model. The utilization of both a charged coupled device (CCD) camera and a 3-D laser digitizer, in the reverse engineering process, is a major step to attaining this goal. A neural network based segmentation algorithm is applied to stereo images for the location of the target object in the laser scanner work space and to generate the laser scanner path. The process automatically generates a description of an object’s surface which can be exported to a CAD/CAM package for design or manufacturing applications. [S1087-1357(00)00503-7]

scholarly journals Accuracy Evaluation of Additively and Subtractively Fabricated Palatal Plate Orthodontic Appliances for Newborns and Infants–An In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4103
Author(s):  
Maite Aretxabaleta ◽  
Alexey Unkovskiy ◽  
Bernd Koos ◽  
Sebastian Spintzyk ◽  
Alexander B. Xepapadeas
Keyword(s):  
Layer Thickness ◽  
In Vitro Study ◽  
Orthodontic Appliances ◽  
Accuracy Evaluation ◽  
Palatal Plate ◽  
Cad Cam ◽  
Subtractive Manufacturing ◽  
Palatal Stimulation ◽  
Manufacturing Time

Different approaches for digital workflows have already been presented for their use in palatal plates for newborns and infants. However, there is no evidence on the accuracy of CAD/CAM manufactured orthodontic appliances for this kind of application. This study evaluates trueness and precision provided by different CAM technologies and materials for these appliances. Samples of a standard palatal stimulation plate were manufactured using stereolithography (SLA), direct light processing (DLP) and subtractive manufacturing (SM). The effect of material (for SM) and layer thickness (for DLP) were also investigated. Specimens were digitized with a laboratory scanner (D2000, 3Shape) and analyzed with a 3D inspection software (Geomagic Control X, 3D systems). For quantitative analysis, differences between 3D datasets were measured using root mean square (RMS) error values for trueness and precision. For qualitative analysis, color maps were generated to detect locations of deviations within each sample. SM showed higher trueness and precision than AM technologies. Reducing layer thickness in DLP did not significantly increase accuracy, but prolonged manufacturing time. All materials and technologies met the clinically acceptable range and are appropriate for their use. DLP with 100 µm layer thickness showed the highest efficiency, obtaining high trueness and precision within the lowest manufacturing time.

Teknik Penilaian Produk Materi PAI Terpadu Untuk MI/SD

AS-SABIQUN ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 153-185
Author(s):  
Solekan Solekan ◽  
Halili Halili
Keyword(s):  
Data Collection ◽  
Core Competencies ◽  
Islamic Education ◽  
Material Development ◽  
Education Material ◽  
Library Research ◽  
Basic Competencies ◽  
Main Components ◽  
Object Of Study ◽  
Thematic Learning

One of the most prominent implications of the implementation of the 2013 curriculum primarily for the SD / MI level is the use of integrated thematic learning. PAI subject matter in MI / SD must refer to core competencies where basic competencies are classified into four competency aspects (spiritual, social, knowledge and skills attitudes). That is, the material of PAI MI in the MI 2013 curriculum is expanded, by implementing integrated thematic learning implementation steps which include three main components, namely preliminary activities, core activities, and closing activities. The purpose of this study is to provide an analysis of the meaning, function, purpose and use of the stages of implementation of Integrated Islamic Education Material Development for MI / SD and the implementation of the steps for implementing Integrated Islamic Education Material Product learning for MI / SD which includes three main components. In this study the authors used data collection methods with documentation methods, as in the data collection techniques in library research (library research). The documentation method is a method used by researchers to objects or documents such as magazines, books, journals, meeting minutes and so on. The object of study in this article is focused on understanding the meaning, function, purpose, and use of the stages of implementing the development of integrated Islamic education materials for MI / SD and the implementation of the steps for implementing Integrated PAI material product learning for MI / SD which includes three main components.

Femur Model Reconstruction Based on Reverse Engineering and Rapid Prototyping

2016 ◽  
Author(s):  
Tongming TANG ◽  
Zheng ZHANG ◽  
Hongjun NI ◽  
Jiawen DENG ◽  
Mingyu HUANG
Keyword(s):  
Rapid Prototyping ◽  
Reverse Engineering ◽  
Model Reconstruction
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