Decomposition of a 2D assembly drawing into 3D part drawings

Tanaka, Masaji; Iwama, Kazuo; Hosoda, Atsushi; Watanabe, Tohru

doi:10.1016/s0010-4485(97)00051-1

Cited by 16 publications

(10 citation statements)

References 9 publications

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“…al [9] [10]. They first proposed a method using solid elements [9] to isolate the 3D parts. A solid element is a closed region of faces and is the same as the elementary solids obtained in the wireframe approach.…”

Section: Related Workmentioning

confidence: 99%

“…Using this information the portions of the drawing corresponding to the standard parts are first identified (referred to as virtual 2D part drawings). Solid elements are generated from these virtual 2D part drawings and combined using conditions in their earlier paper [9] to get the 3D parts.…”

Section: Related Workmentioning

confidence: 99%

“…Given an additional side view (that is different from the other input views), a unique solution is identified. In contrast to earlier efforts [9][10], the present method does not require cross-sectional views to capture interior details and prior information about the part numbers in the drawing.…”

Section: Present Workmentioning

confidence: 99%

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Volume Based Approach to Extract 3-D Parts from 2D Assembly Drawing

Bhushan¹,

Gurumoorthy²

2006

Computer-Aided Design and Applications

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This paper extends an earlier volume-based approach to automatically reconstruct 3D parts from the 2D orthographic views of an assembly drawing. Most of the work in automatic reconstruction of 3D solids using volume-based approach from 2D orthographic views has been done only for single component drawings. The proposed method identifies elementary solids called candidate blocks from the orthographic views and then combines these solids to obtain different parts in the assembly. The candidate blocks are combined on the basis of some conditions defined based on the validity of solids and characteristics of an assembly. Earlier efforts towards addressing multi-part assembly drawing either require additional inputs in the form of labeling of parts in the drawing, additional special cross-sectional views or are restricted to assemblies with standard parts. Results have been achieved for some typical engineering assembly drawings. Future work will address extension of this algorithm to assembly drawings with sectional views.Keywords: assembly drawings, 3D parts, orthographic views, volume-based INTRODUCTIONConventionally an engineering drawing has been a means to store information about complex 3D parts in 2D form. The drawing contains all the required information about the 3D object in an accurate, concise and systematic way. In industries, there is huge legacy of data and product information available in the form of engineering drawings (either in the hard copy form of blue prints of drawings or in the digital/soft form generated by available computer-aided drafting tools), which are continuously used in new product development. This form of shape representation continues to increase due to its familiarity for users and consequent ease in manipulation. Understanding engineering drawing requires a thorough knowledge of the rules and conventions of engineering drawing and industry/organization specific protocols. As the complexity of the drawing increases (sectional views, auxiliary views), the skills required for interpretation also increases. A 3D solid model is becoming essential for other design tasks such as CFD/FEM analysis, rapid prototyping, and simulation. Automatic construction of 3D solid model from 2D drawing is of great importance given the penetration of 3D models in product development tasks and the specialized skill required to manually interpret the drawing. Automatic conversion of 2D views of engineering drawings into 3D model has been a challenging and popular problem in CAD area. Since 1980, many methods for reconstruction of solid model from orthographic views have been proposed and implemented. The approach for automatic reconstruction of a solid model from a 2D engineering drawing can be broadly classified as:

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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Volume Based Approach to Extract 3-D Parts from 2D Assembly Drawing

Bhushan¹,

Gurumoorthy²

2006

Computer-Aided Design and Applications

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“…Then, all the body loops are constructed and the blocks are combined into 3D objects. With the algorithm developed by Shin [20][21][22], candidate vertices and candidate edges are constructed. Then a wireframe model is generated by classifying the edges.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of 3D models from 2D orthographic views using solid extrusion and revolution

Çıçek

Gülesın

2004

Journal of Materials Processing Technology

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“…More recently, Liu [16] and Oh [17] extended the earlier methods to deal more ef®ciently with curved surfaces. Tanaka [18] gave a method for automatically decomposing a 2-D assembly drawing into 3-D part drawings by a system of solid element equations.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of curved solids from engineering drawings

Liu

Chen

et al. 2001

Computer-Aided Design

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This paper presents a new approach for reconstructing solids with planar, quadric and toroidal surfaces from three-view engineering drawings. By applying geometric theory to 3-D reconstruction, our method is able to remove restrictions placed on the axes of curved surfaces by existing methods. The main feature of our algorithm is that it combines the geometric properties of conics with af®ne properties to recover a wider range of 3-D edges. First, the algorithm determines the type of each 3-D candidate conic edge based on its projections in three orthographic views, and then generates that candidate edge using the conjugate diameter method. This step produces a wire-frame model that contains all candidate vertices and candidate edges. Next, a maximum turning angle method is developed to ®nd all the candidate faces in the wire-frame model. Finally, a general and ef®cient searching technique is proposed for ®nding valid solids from the candidate faces; the technique greatly reduces the searching space and the backtracking incidents. Several examples are given to demonstrate the ef®ciency and capability of the proposed algorithm. q

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Decomposition of a 2D assembly drawing into 3D part drawings

Cited by 16 publications

References 9 publications

Volume Based Approach to Extract 3-D Parts from 2D Assembly Drawing

Volume Based Approach to Extract 3-D Parts from 2D Assembly Drawing

Reconstruction of 3D models from 2D orthographic views using solid extrusion and revolution

Reconstruction of curved solids from engineering drawings

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