Transportation Safety Evaluation And Packaging Optimization Design Of CNC Machine Tools Based On Condition Monitoring Data

High-precision,high-value CNC machine tools as an "industrial mother machine" are an important symbol of the development of a country’s manufacturing industry.The manufacture and use of CNC machine tools are mostly in different enterprises,and the machine tool needs to be transported to the user enterprise for service after the completion of machine tool manufacturing.At present,people pay more attention to the design,manufacture and operation and maintenance of machine tools,and lack of attention to the safe transportation of products,due to insufficient packaging design,improper driving behavior of drivers,unreasonable planning of transportation routes and other reasons often cause machine tool transportation failure,resulting in huge economic losses.Most of the existing transportation standards have been improved on the basis of ordinary logistics and transportation standards,and the industry’s safety evaluation methods and transportation specifications are lacking,and the transportation safety risks are huge.This paper evaluates the transportation safety status of CNC machine tools on the basis of establishing the safety evaluation model of the transportation stage of CNC machine tools,and carries out packaging optimization design and transportation safety guidance according to the evaluation results,the main contents are as follows:(1)Improve the monitoring equipment for the transportation process of CNC machine tools and collect transportation data.Determine the monitoring indicators for the transportation process of CNC machine tools based on the causes of faults and transportation characteristics during the transportation stage.Based on the monitoring indicators and the problems existing in the first generation of transportation process monitoring equipment,the CNC machine tool transportation process monitoring equipment has been improved,and real-time status monitoring of the machine tool has been carried out to provide data support for the safety evaluation of subsequent CNC machine tool transportation stages.(2)The multi-level fuzzy comprehensive evaluation method is used to evaluate the safety of CNC machine tools before transportation.Taking the CNC hard turning machine tool as an example,this paper establishes a multi-level fuzzy comprehensive evaluation model based on the method of determining the weight of safety evaluation index based on BWM-entropy weight method,evaluates the safety of CNC hard turning machine tools before transportation,and takes the evaluation results as the basis for transportation judgment.(3)Safety evaluation of CNC machine tools during transportation based on condition monitoring data.In this paper,the wavelet packet decomposition method is used to extract the image features of the transportation condition monitoring signal,and the extracted feature signals are classified.Combined with the classification results,the DS evidence theory is used to fuse the feature data,and the safety evaluation results of the actual transportation process of the CNC hard turning machine tool are obtained,which provides the basis for the subsequent optimization design of the machine tool packaging.(4)Based on the safety evaluation results,the packaging optimization design of CNC hard turning machine is carried out.In this paper,the transportation packaging model is established based on the safety evaluation results and the condition monitoring data of the transportation process,and the typical working condition optimization simulation experiment is carried out to find out the potential defects of the CNC hard turning machine tool packaging and put forward the packaging optimization design measures,which improves the transportation safety level of the machine tool.