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A single solution method for converting 2D assembly drawings to 3D part drawings

机译:将2D装配图转换为3D零件图的单一解决方案方法

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摘要

Although solid models play a central role in modem CAD systems, 2D CAD systems are still commonly used for designing products without complex curved faces. Therefore, an important task is to convert 2D drawings to solid models, and this is usually carried out manually even in present CAD systems. Many methods have been proposed to automatically convert orthographic part drawings of solid objects to solid models. Unfortunately, products are usually drawn as 2D assembly drawings, and therefore, these methods cannot be applied. A further problem is the difficult and time-consuming task of decomposing 2D assembly drawings into 2D part drawings. In previous work, the authors proposed a method to automatically decompose 2D assembly drawings into 3D part drawings, from which 2D part drawings can be easily generated. However, one problem with the proposed method was that the number of solutions could easily explode if the 2D assembly drawings became complex. Building on this work, here we describe a new method to automatically convert 2D assembly drawings to 3D part drawings, generating a unique solution for designers regardless of the complexity of the original 2D assembly drawings. The only requirement for the approach is that the assembly drawings consist of standard parts such as bars and plates. In 2D assembly drawings, the dimensions, part numbers and parts lists are usually drawn, and the proposed method utilizes these to obtain a unique solution.
机译:尽管实体模型在现代CAD系统中起着核心作用,但是2D CAD系统仍然普遍用于设计没有复杂曲面的产品。因此,重要的任务是将2D工程图转换为实体模型,并且即使在当前的CAD系统中,这通常也是手动执行的。已经提出了许多方法来将实体的正交零件图自动转换为实体模型。不幸的是,产品通常以2D装配图的形式绘制,因此无法应用这些方法。另一个问题是将2D装配图分解为2D零件图的困难且耗时的任务。在先前的工作中,作者提出了一种将2D装配图自动分解为3D零件图的方法,从中可以轻松生成2D零件图。但是,该方法的一个问题是,如果2D装配图变得复杂,解决方案的数量很容易爆炸。在此工作的基础上,我们在此介绍一种新方法,该方法可以自动将2D装配图转换为3D零件图,从而为设计人员提供独特的解决方案,而无需考虑原始2D装配图的复杂性。该方法的唯一要求是,装配图由标准零件(如钢筋和板材)组成。在2D装配图中,通常会绘制尺寸,零件编号和零件清单,并且所提出的方法利用这些来获得唯一的解决方案。

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