Human-machine interactive assembly process planning system

Abstract

The invention discloses a human-machine interactive assembly process planning system of the manufacturing field. In the system, an assembly data preprocessing module establishes a corresponding collision detection model corresponding to a CAD geometric model of each part, designates an assembly constraint element, and establishes an assembly relation tree; a virtual assembly simulation module extracts data required by the virtual assembly to establish a virtual assembly simulation scene; an assembly auxiliary analysis module achieves dynamic playback of an assembly procedure, statically displays an assembly track of the part, and computes a distance between the models; an assembly process generation module acquires assembly procedure data from a virtual assembly database, generates an assembly process by reference to entries of a standard assembly process in the database, and divides service positions; an assembly process evaluation module reads an assembly operation action and operation object data, computes the efficiency of the assembly procedure to obtain ergonomic analysis data; and a virtual assembly data management module executes a data maintenance task. The assembly process planning system achieves dynamic assembly and process planning functions of mechanical products in a virtual environment.

Description

technical field [0001] The invention relates to a system in the field of manufacturing technology, in particular to a human-computer interaction assembly process planning system. Background technique [0002] Product assembly is a key step in the process of product design and realization. Assembly planning provides key design feedback that helps designers improve designs from a manufacturing standpoint. Product assembly based on virtual reality technology can reduce labor and improve the quality and integrity of product assembly planning. Assembling the product in a virtual environment increases the authenticity of the product assembly process and improves the efficiency of product assembly verification; The academic evaluation provides the basis. Virtual assembly process planning has the characteristics of quickness, high efficiency and low cost, which can greatly shorten the product development cycle, reduce production costs, and improve the competitiveness of products ...

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Problems solved by technology

[0003] Found through the retrieval of prior art document, Christian Mascle etc. published "Feature- A feature-based model was proposed in "Based Assembly Model and Multi-Agents System Structure for Computer-Aided Assembly" (feature-based assembly modeling and computer-aided assembly multi-agent system structure), and a feature-based product assembly planning system SCAP was developed , using a set of criteria based on assembly feasibility, operability, assembly reorientation times, cost and stability, etc., to measure the quality of the obtained assembly sequence, and the feature-based product model has an important role in assembly modeling and planning Great help, but the research focuses on the planning of assembly sequences and paths, and does not involve the complete and complex assembly process content

[0004] After searching, it was also found that Liu Jianhua et al. published "Research on Virtual Assembly Process Model Based on Assembly Task" on pages 2163-2166 of "Journal of System Simulation" (2005) in the process of process data in the process of virtual assembly process planning. Based on the analysis, a product-level assembly task chain model is proposed. This model can effectively express the process data in the process of virtual assembly process planning. At the same time, a transformation method is given from the product-level assembly task chain model to the virtual assembly process model. Virtual assembly process model, but the research on the process is only limited to the data collection and processing of the operation process information of the assembly fixture, and does not involve the research on the specific assembly operation process in virtual assembly

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