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Research and Development on Assembly Sequence Planning System Based on 3D CAD

Author: GaoYanLi
Tutor: YanXiaoGuang
School: Huazhong University of Science and Technology
Course: Mechanical Manufacturing and Automation
Keywords: Three-dimensional CAD Assembly sequence planning Hierarchical model Association model Interference checking
CLC: TG95
Type: Master's thesis
Year: 2005
Downloads: 205
Quote: 5
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Abstract


Due to the continuous development of CAD / CAM technology , product design and processing cycle, the proportion of the entire life cycle of the product is gradually reduced, the assembly process is done manually , seriously restricting the production of the product . Product assembly sequence planning is the key technology of the assembly process design , automatic assembly sequence planning needs of more and more urgent . Assembly Sequence Planning theory on the basis of domestic and foreign assembly sequence planning Research carried out in-depth research . In order to shorten the time of assembly sequence planning to meet the needs of practical application , this study a three-dimensional CAD assembly sequence planning software system : the use of the geometric model of the products has been established in the three-dimensional CAD platform , human-computer interaction to determine the hierarchical model sub assembly sequence assembly and sub-assembly parts assembly sequence planning method automatically generated . CAD platform to establish three-dimensional geometric model based on sub-assembly identification based on predefined rules , human-computer interaction , the products division of the sub-assembly , and a preliminary hierarchical assembly model . Call the the the CAD platform assembly simulation module , step by step dynamic simulation to verify the reasonableness of the hierarchical assembly model , to further generate sub-assembly assembly sequence . By CAD platform interface to obtain sub - assembly of the body parts information and methods of constraint relations , the establishment of a sub- assembly products associated model , and the model using the Relationships graph theory characterized . Interference checking function , using the platform provides access to interfere in the relationship between the parts in automated assembly process matrix . Obtained interference matrix for each sub-assembly , sub-assembly parts disassembly sequence in reverse order , and then seek to assembly sequence planning . As a result, the body parts of the sub-assembly automatically sequence planning . COM principle , VC prepared using a CAD interface for sub-assembly and interference checking function automatically generate assembly sequence program . The man-machine interface , and completed the basic development of the assembly sequence planning system . The application of the proposed assembly sequence planning ideas, analysis of the the gearbox assembly sequence planning process , and the actual sequence planning , and verify the effectiveness of the system .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Fitter process and assembly process > Machine assembly, machine installation method
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