The Research On Virtual Assembly And Capacity Difference Of Cabin Based On Measured Model

Small deformation is often occurred after cabin which is made of composite materials made into a thin-walled structure. In the cabin if plenty of supportors are installed and to guarantee sufficient accuracy, collision is easily occurred. Therefore production can not be through automation equipment instead of using the manual approach, resulting in very low productivity. In order to obtain optimal supportor installation location in the actual cabin, ensure that no interference is occured and to ensure the technical requirements, and to ensure the automation production, The installation process studies and simulation analysis are needed. Addressing this issue, this article reads as follows:First of all, through the articulated arm measuring, machine cabin actual model point cloud data was got. The key technologies required for virtual assembly model based on measured was analysised and learned. Respectively:1Point cloud processing and information reconstruction, including point cloud data processing point cloud denoising, large point cloud data reduction, point cloud data to fit the surface.2Point cloud data reconstruction techniques including rotary concentricity in the point cloud, round beating the whole run information.3The packaging technology based on the facets is discussed. And use these technologies to build virtual assembly simulation platform.Secondly, the establishment of a cabin bracket fat constraint model is builded. According to the supportor assembly characteristics,the method of supportor assemble point selection is given in the article. Fitting surfaces from point cloud data given to calculate the supportor match point in the measured model calculation. Establish critical control points and critical control surfaces to get the suppportor in the cabin of fine-tuning, point and surface movement curve matching algorithm and the interpolation algorithm. Point and surface constraints limit the possible collision between the bracket.Finally, according to the problem of supportor technology is given to establish the chain of ring size and the establishment of a bracket assembly ring size chain, the establishment of tolerance optimization model, considering the bracket between constraints to ensure that the premise of non-collisionaccess to the gap between the higher assembly stability, and optimal stent. Simulation prove the accuracy of the method and to build a virtual assembly platform.