Automatic Recognition of Multi-Axis Machining Features Based on Machining Process from 3D Solid Model

2015 ◽  
Vol 789-790 ◽  
pp. 873-877 ◽  
Author(s):  
Phung Xuan Lan ◽  
Hoang Vinh Sinh
Keyword(s):  
Automatic Recognition ◽  
Machining Process ◽  
Solid Model ◽  
Machining Features ◽  
Rule Based ◽  
Machining Feature ◽  
Complex Design ◽  
3D Solid ◽  
The Relationship

This paper presents an effective rule-based method for extracting and recognizing the machining features from 3D solid model. The machining feature is automatically recognized while considering the relationship between machining feature and machining process. This proposed method is capable of recognizing not only prismatic machining features but also multi-axis machining features from many kinds of complex design features in both protrusion and depression. It also succeeds in recognizing various types of interaction in a uniform way. The capability of the proposed method is demonstrated in one specific case study.

POWERTRAIN MACHINING FEATURE IDENTIFICATION

2004 ◽  
Vol 03 (01) ◽  
pp. 103-110 ◽  
Author(s):  
SANGCHUL PARK
Keyword(s):  
Feature Recognition ◽  
Geometric Algorithms ◽  
Machining Process ◽  
Feature Identification ◽  
Machining Features ◽  
Efficient Procedure ◽  
Machining Feature ◽  
Intuitive Idea ◽  
Machining Process Planning ◽  
Part Model

Presented in this paper is a procedure to identify machining features of powertrain components. Machining feature recognition is one of the most important steps for machining process planning. In the case of powertrain components, the first step is to compare a machined model (finished part model) and the corresponding rough part model to identify the volume which should be removed from the rough part model. In regard to the comparison, the most intuitive idea is to use a 3D BOOLEAN operation. Although this approach looks fine, it might not take advantage of the inherent attributes of powertrain component machining. This paper focuses on two important attributes of powertrain machining: (1) a machined model and the corresponding rough part model are very similar and have many identical faces and (2) a rough part model always contains the machined model. Based on these two attributes, we develop an efficient procedure for identifying powertrain machining features. Since the proposed procedure employs well-known 2D geometric algorithms instead of 3D BOOLEAN operations, it is very efficient and robust.

Research on Surfacing Welding and Machining Process of Large Valve Corrosion Resistant Layer

2014 ◽  
Vol 941-944 ◽  
pp. 2039-2042
Author(s):  
Yue Zhang ◽  
Xi Chuan Zhang ◽  
Yu Qiang Ma
Keyword(s):  
Corrosion Resistance ◽  
Layer Thickness ◽  
Cutting Process ◽  
Machining Process ◽  
Solid Model ◽  
Valve Body ◽  
Engineering Significance ◽  
Resistant Layer ◽  
The Cost ◽  
3D Solid

The corrosion resistance layers can be surfaced in the valve casted by carbon steel, to enhance the corrosion resistance performance. By the 3D solid model, the weight and internal area of valve body was obtained. The surfacing process was designed and the welding rods theory amount was calculated. And the actual amount was close to the theory one. The surfacing and cutting process was designed for the fit surfaces and the dimension chain was calculated to meet the fit accuracy and the corrosion resistance layer thickness. The results show that it has the engineering significance by using 3D solid model to estimate the producing costs; the fit accuracy and the corrosion resistance layer thickness can be obtained together based on the surfacing and cutting process; in this way, the cost can be cut down more than 30%, compared the whole stainless steel valve.

Automatic recognition of machined surfaces from a 3D solid model

1984 ◽  
Vol 16 (2) ◽  
pp. 81-86 ◽  
Author(s):  
B.K. Choi ◽  
M.M. Barash ◽  
D.C. Anderson
Keyword(s):  
Automatic Recognition ◽  
Solid Model ◽  
3D Solid ◽  
Machined Surfaces

Machining Feature Modeling and Process Intermediate Model Generation in Process Planning

2013 ◽  
Author(s):  
Xu Zhang ◽  
Chao Liang ◽  
Tiedong Si ◽  
Ding Ding
Keyword(s):  
Process Planning ◽  
Feature Recognition ◽  
3D Models ◽  
Machining Process ◽  
Model Generation ◽  
Machining Features ◽  
Intermediate Model ◽  
Machining Feature ◽  
Feature Based ◽  
Solid Modeler

In process planning of machined part, machining feature recognition and representation, feature-based generative process planning, and the process intermediate model generation are the key issues. While many research results have been achieved in recent years, the complete modeling of machining features, process operations, and the 3D models in process planning are still need further research to make the techniques to be applied in practical CAPP systems. In this paper, a machining feature definition and classification method is proposed for the purpose of process planning based on 3D model. Machining features are defined as the surfaces formed by a serious of machining operation. The classification scheme of machining features is proposed for the purpose of feature recognition, feature-based machining operations reasoning, and knowledge representation. Recognized from B-Rep representation of design model, machining features are represented by adjacent graph and organized by feature relations. The machining process plan is modeled as operations and steps, which is the combination and sequencing of machining feature’s process steps. The process intermediate models (PIM) are important for process documentation, analysis and NC programming. An automatic PIM generation approach is proposed using local operations directly on B-Rep model. The proposed data structure and algorithm is adopted in the development of CAPP tool on solid modeler ACIS/HOOPS.

scholarly journals FROM TLS SURVEY TO 3D SOLID MODELING FOR DOCUMENTATION OF BUILT HERITAGE: THE CASE STUDY OF PORTA SAVONAROLA IN PADUA

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 303-308 ◽  
Author(s):  
A. Guarnieri ◽  
F. Fissore ◽  
A. Masiero ◽  
A. Vettore
Keyword(s):  
Laser Scanning ◽  
Cultural Landscapes ◽  
3D Models ◽  
Solid Model ◽  
High Expectations ◽  
Cultural Objects ◽  
Laser Scanners ◽  
Close Range ◽  
3D Solid

It is a matter of fact that 3D visualisation and proper documentation of cultural objects helps to preserve the history and memories of historic buildings, archaeological sites and cultural landscapes, and supports economic growth by stimulating cultural tourism. Preservation, visualisation and recreation of valuable historical and architectural objects and places has always been a serious challenge for specialists in the field. Today, the rapid developments in the fields of close-range photogrammetry, terrestrial laser scanning (TLS) and computer vision (CV) enable to carry out highly accurate 3D models so as to be extremely effective and intuitive for users who have stringent requirements and high expectations. In this note we present the results of the survey and 3D modeling of an ancient gate, Porta Savonarola, located within the remains of the medieval town walls surrounding the historical city center of Padua, Italy. The work has been undertaken within the framework of the project “Walls Multimedia Museum” (WMM) promoted by the local private association “Padua Walls Committee”. The goal of the project was to develop a prototype of an “extended” virtual museum, spreaded along most interesting locations of the town walls. The survey of the ancient gate was performed with a Leica C10 and P20 terrestrial laser scanners. Once the acquired scans were properly merged together, a solid model was generated from the global point cloud, and plans and elevations were extracted from it for restoration purposes. A short multimedia video was also created for the “Walls Multimedia Museum”, showing both the outer and inner part of the gate. In the paper we will discuss all the steps and challenges addressed to provide the 3D solid model of Porta Savonarola from the TLS data.

Machining Feature Sequencing for Aircraft Structural Parts

2012 ◽  
Vol 591-593 ◽  
pp. 361-364
Author(s):  
Shu Lin Chen ◽  
Fang Fang Yu ◽  
Guo Lei Zheng ◽  
Bao Rui Du ◽  
Hong Zhen Chu
Keyword(s):  
Data Model ◽  
Machining Process ◽  
Relationship Matrix ◽  
Programming System ◽  
Machining Features ◽  
Nc Programming ◽  
Feature Grouping ◽  
Tree Data ◽  
Structural Parts

To improve quality and efficiency of NC machining sequencing, an approach to order the machining features of aircraft structural parts is introduced in accordance with the principle of hierarchical planning, knowledge and geometry-based reasoning method. The main contents consist of: (1) Machining cell and its geometric descriptions are established, and the method for decomposing generalized pocket (GP) into machining cells is proposed. (2) Based on the GP relationship tree, data model and algorithm for generating machining chain are presented. (3) Machining process segmenting, feature grouping and sequencing rules are formulated by communicating with related experts. (4) Priority graph and relationship matrix of features are applied to describe the machining precedence. The developed approach has been applied in Intelligent NC Programming System of Aircraft Structural Parts and is validated through a case study.

Automatic Process Intermediate Model Generation in Process Planning

2013 ◽  
Vol 834-836 ◽  
pp. 1436-1443
Author(s):  
Xu Zhang ◽  
Chao Liang ◽  
Wei Yu Li
Keyword(s):  
Process Planning ◽  
Process Analysis ◽  
Three Dimensional ◽  
Machining Process ◽  
Automatic Process ◽  
Solid Model ◽  
Model Generation ◽  
Machining Features ◽  
Intermediate Model ◽  
Solid Modeler

In process planning of machined part, three-dimensional process intermediate models are necessary for process design, documentation, and downstream applications including clamping design, NC programing, and process analysis. An automatic process intermediate model generation method is proposed in this paper for machined part represented in B-Rep solid model. Machining features are recognized and classified according to process type. Process plan is expressed in terms of machining features and feature surface modification operations in solid model. Local modification operations are applied to part model to move, replace or remove feature surface resembling machining process. Process intermediate models are generated automatically in a batch manner by applying geometry and topology modification operations directly on B-Rep model for each machining operation. The proposed algorithm is implemented in a CAPP tool developed in solid modeler ACIS.

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