Generation of Disassembly Directions Based on Component Mobility

Abstract

The paper presents the development of a new software tool integrated with SolidWorks CAD system for generating feasible disassembly directions based on the concept of mobility operator. In generating the disassembly path of a component, our approach considers that two steps should be undertaken: first, the interface between components is broken and then the component is extracted from the assembly by translating it along a collision free removal path. Different data from the CAD model of the assembly is automatically detected, such as: geometrical constraints, contact surfaces relative position, common area, components neighbours, etc. Based on this information, a general mobility operator is deployed, which is further used to evaluate the families of trajectories associated to the contacts between different components of a mechanical system. Thus, the developed mobility operator mathematically expresses all possible movements between assembly components (rotations, translations and helical movements), and it can be used for a real time graphical representation of components mobilities, mandatory aspects in developing a virtual environment for simulating the Assembly/Disassembly (A/D) tasks as part of an efficient Product Design Process (PDP).

Evaluation of a Haptic Environment for Assembly Task Simulation

“…is automatically computed and stored in a dedicated data structure. A first implementation was presented în (Iacob, 2013 CVE can handle the components' movement through a real-time management of collision detection and kinematically constraint guidance.…”

“…In order to achieve these goals, engineers make use of different knowledge, tools and methods (Pupaza, 2014), (Iacob, 2013) for supporting their work and for the early evaluation of their design decisions over the assembly cost and time. Efficient design software applications are offering the possibility to generate and use completely parameterized virtual 3D assembly models for automating activities such as: component design changes propagation within assembly, BoM (Bill of Materials) generation, interference checking or component reuse.…”

A New Approach for the Control Optimization of an Assembly/Disassembly Mechatronics Line Served by an Autonomous Robotic System

“…The assembly/disassembly operation can by decomposed into a sequence of elementary assembly tasks coupled in parallel with positioning tasks of work-piece along conveyor, as in (Baldwin, et al, 1991;Choi, et al, 1998;Ganget, et al, 2005) and (Iacob and Popescu, 2013 In Figure 2 is represented an elementary TPN model corresponding to an assembly operation. During disassembly process one can identify a repetitive sequence associated to a single disassembly operation and service assistance of WMR equipped with RM.…”

A systematic review of environmentally conscious product design

“…But how to update the ecological knowledge base conveniently still need to be further studied. Second, eco-design tools are eager to be combined with commercial CAD software to ease the eco-performance analysis [111][112][113][114]. For instance, the materials' eco-impact analysis in parts, disassembly movement analysis, and material compatibility analysis in DFR had been achieved by ecodeveloped CAD.…”

“…Thus, they are suit to be improved to generate commercial eco-design software for industries. Table 3 List of eco-design software tools Description Contribution Knowledge management system for eco-design [110] Two parts including an eco-design process reference model and personalisation strategy Integrated eco-design tool [111] Including databases, perspective tools, and analytical tools Eco-design based on CAX systems [112] Eco-design tool based on feature technology and CAD/CAM/CAPP/PLM EcoCAD tool [113] To improve material toxicity and ease of disassembly, combined with CAD Disassembly direction analysis tool [114] Integrated with SolidWorks to generate feasible disassembly directions iTree [115] Combining eco-design and TRIZ together to create eco-design guidelines SPICE [116] Aiding strategic design management and material selection for eco-design…”