| The rolling mill is the "mother machine" of steel rolling production,and its spatial accuracy directly affects the rolling stability and product quality.The large-scale,high-speed and high-performance of rolling equipment put forward higher requirements for the spatial accuracy of large rolling mills.Although the current strip rolling production line has a high level of sensing testing capabilities and automation control,there is still a lack of effective rolling mill space accuracy information perception means,in order to meet the higher and finer production requirements of steel,it is urgent to develop professional and efficient detection methods and analysis software.Aiming at the characteristics of large rolling mill space size and high detection accuracy,this paper proposes a detection and analysis method based on laser tracker,and uses the high-precision detection method of laser to realize the precision detection of the space accuracy of the rolling mill.Combined with the actual situation on the spot,a specific testing program has been formulated,so that under the premise of ensuring that the testing equipment has a high precision,the detection means and process are standardized,and the error caused by human beings in the detection process is reduced.In addition,in view of the establishment of the rolling mill space model,through the simplification and splitting of the equipment composition,the rolling mill is divided into two key parts of the frame and the roll system,and a special spatial model reduction algorithm is established respectively.Among them,the rack is simplified to a rack space model constructed by the liner surface and the center plane,and the roller system space model of the slewing centerline and the cylinder surface is constructed.A complete algorithm process is developed for the spatial model fitting calculation of each part and the parameter calculation of key precision.Then,the tracker-based detection function and the calculation and analysis function based on the inspection data were programmed,and the laser inspection and analysis software for rolling mill space accuracy was developed using Visual C#.Functions include laser tracker connection,initialization settings,spatial scanning,data acquisition,and the use of inspection data and the established spatial model for fitting calculations,to obtain the spatial position of each liner of the rolling mill and the parameters of the roll centerline,which is used to evaluate the spatial accuracy of the inspection mill and explain the analysis results.Finally,the data detection and computational analysis of the F1# rolling mill of the 1580 mm hot rolling production line of a steel mill were carried out using the developed software,and the inspection and analysis results were compared with the results of the general inspection software Spatial Analyzer.The results show that the two have a high degree of coincidence,and the analysis time of the self-developed software is only 2minutes,which is much lower than the analysis time of Spatial Analyzer(about 2 hours),which verifies the credibility and computational efficiency of the proposed algorithm and detection method proposed in this paper. |
