Automatic Collision Detection for Assembly Sequence Planning Using a Three-Dimensional Solid Model

Abstract

Assembly sequence planning of a product involves several steps, including generation of precedence constraints, generation of assembly sequences, and selection of assembly sequences. Generation and selection of assembly sequences should be able to guarantee the feasibility of assembly. Assembly will be feasible if there is no collision between components when assembled. Detection of collision-free path of assembly can be done in an automated way. There are a number of collision detection methods that have been developed, but the method requires a complicated process of data geometry analysis. This paper proposes a method for detecting a collision-free path of the assembly component in a more simple way. Geometrical data required, taken from the three-dimensional (3D) solid drawing in the form of stacked drawing in computer-aided design (CAD) systems. Retrieval of geometrical data of components and detection of the collision-free path of an assembly were done in an automated way, directly from the CAD system.

Automatic Precedence Constraint Generation for Assembly Sequence Planning using a Three-Dimensional Solid Model

“…Precedence constraint is used to guarantee the feasibility of the generated assembly sequence, and is ascertained by considering the CFAP. CFAP information was obtained by using the automatic method proposed by Alfadhlani et al (2011). The precedence constraint generation in this paper was performed following three steps: (1) determine the components to be released based on the CFAP;…”

“…A feasible assembly must be free of collisions between components, which can occur when one component is blocked by another in the assembly. The collision-free assembly path (CFAP) information in this paper was established by using a CFAP algorithm proposed by Alfadhlani et al (2011). The paper discusses the development of an automated method for generating precedence constraints using the disassembly approach, and considering the CFAP information, the number of component connections, and component volume.…”

“…The paper discusses the development of an automated method for generating precedence constraints using the disassembly approach, and considering the CFAP information, the number of component connections, and component volume. All these data were extracted from the CAD database using the component database formation algorithm proposed by Alfadhlani et al (2011). SolidWorks 2005 was used as the CAD system, and a stacked drawing in a 3D solid model was used as input.…”

A review on assembly sequence generation and its automation

“…Li et al 21 proposed method to extract assembly incident matrix and interference relation data by polychromatic set-based assembly modelling; Alfdhlani et al 22 presented method to extract assembly interference free matrices through 3D collision detection along all principal axes through solid works API though these methods are useful to do automation. One step ahead of these automated methods, to find economical feasibility for a component-modified bounding box method is proposed by Bahubalendruni and Biswal.…”

“…Attempts have been made to develop methodologies and their automation in order to extract the data from computer aided design (CAD) files of an assembled product. [12][13][14][15][16][17][18][19][20][21][22] For this purpose, researchers make use of CAD data exchanging formats and Application Program Interface (APIs).…”