Abstract
Industrial robots are increasingly being used as a substitute for multi-axis metal-cutting machines in complex workpiece machining. However, there is a problem with robots’ low rigidity compared to cutting machines. For this reason, robots machining accuracy is still insufficient. Many of the studies explore the estimation of robot links strains to make appropriate corrections of their control software. The finite element method is the most relevant method for strain calculation. However, detailed workpiece CAD models describing all the design features use extremely large number of finite elements. This is a fact that limits application of finite element method by manufacturing engineers. Thus, not only manufacturing engineers but also robot developers find it too difficult to calculate the rigidity using such models. Therefore, there is a problem to modify manufacturing robot control data considering robot strains. In the short and medium terms, this problem can be solved only by using an innovative approach. An application of the robot finite element model, based on its voxel model, is proposed as such an approach. In this case, the voxel model itself is developed using exact robot CAD models developed by manufacturing companies. These voxel and finite element models do not contain specific features of robot design. These models are open-source data and can be distributed from developers to engineers to be used in CAM systems when developing control data for workpiece processing. This approach is illustrated by modeling a four-link industrial manipulating robot. Generated mesh includes 480,000 finite elements and makes it possible to calculate displacements of the robot end effectors during machining process and to consider these displacements in control software developing using CAM system.
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Shchurova, E.I. (2021). Industrial Manipulating Robot Finite Element Mesh Generation Based on Robot Voxel Model. In: Radionov, A.A., Gasiyarov, V.R. (eds) Proceedings of the 6th International Conference on Industrial Engineering (ICIE 2020). ICIE 2021. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-54817-9_27
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