Research On Quality Control Method Of Machine Tool Spindle Remanufacturing Based On Laser Remanufacturing Technology

The spindle is the core part of the machine tool,and its performance and accuracy directly affect the quality of the machine tool product.However,the spindle is prone to failure due to the complicated working environment.Laser remanufacturing technology can remanufacture the failed spindle,repair the surface damage of the spindle and improve the surface strength of the spindle effectively.However,due to the complicated spindle laser remanufacturing process and the multiple quality factors,the repair quality of the spindle varies greatly.Therefore,the spindle laser remanufacturing process and the influence law of remanufacturing quality is analyzed to predict and control the spindle remanufacturing quality and and improve the repair efficiency and quality of the spindle.Based on this,under the support funding of the "China Manufacturing 2025" special green manufacturing system integration project and the remanufacturing process of used machine tool parts of Shenyang Jingxin Remanufacturing Co,the laser remanufacturing process of the spindle is thorough analyzed and the influencing factors and control methods of the remanufacturing quality are mainly studied.The specific research content are as follows:(1)Aiming at the problem of complicated process of spindle laser remanufacturing and complicated quality influencing factors,various failure forms of spindle and it`s accuracy and quality connotation are analyzed.The whole process of spindle remanufacturing is taken as the research object,and a six-stage spindle laser remanufacturing process is proposed.The quality influencing factors in each process stage of spindle remanufacturing are analyzed,and the influence rule of spindle remanufacturing quality is preliminary proved.(2)Aiming at the problem of the complex influence laws of Spindle laser remanufacturing quality,A series of spindle laser remanufacturing process experiments are designed.The influence of various laser process parameters on the quality of the cladding layer is analyzed by orthogonal experiments.The optimal process parameters are determined through the detection of the quality of the cladding layer in different processes.Finally,a laser cladding coating with excellent quality and few internal defects is produced.(3)Aiming to the problem that the topography of spindle laser remanufacturing coatings is difficult to predict and control,considerable experimental data are fitted by multiple linear regression analysis to determine the corresponding relationship between the laser process parameters and the size of the cladding layer.Based on this,a multi-layer cladding layer size prediction model is established.In this model,the profile of the cladding layer is described by a quadratic algebraic equation curve,the height and width of the multi-layer cladding layer under different process parameters can be calculated and Accurate prediction of cladding size during process designcan be achieved.Laser remanufacture of used CW6163 lathe spindle in accordance with the spindle machine remanufacturing process,cleaning,damage detection and other steps are performed sequentially.Appropriate parameter matching is selected to repair the spindle damage and improve the surface quality.Finally,the accuracy of the laser remanufacturing size prediction model is tested,proves that the quality prediction and control of the laser remanufacturing of the used machine tool spindle is supported.