Research On Deformation Mechanism And Improved Process Of Thin Circular Saw Blade Surface Grinding End Jum

With the rapid development of green manufacturing system in stone industry,stone processing requires higher cutting precision,less cutting loss and higher cutting efficiency,which puts forward higher requirements for stone cutting tools.As a thin plate part with low stiffness,diamond circular saw blade is a typical tool for cutting stones.However,the surface accuracy is difficult to manage during the actual grinding process when the end jump deformation of diamond circular saw blade happens owing to stress brought by grinding force,machining damage,clamping deformation,and deformation caused by internal stress release during heat treatment.Engineers have to be highly experienced to control the deformation of circular saw blade so that the deformation could be minimized and the manufacturing could be stabilized in the process of production.Therefore,this thesis aims to study how to optimize manufacturing technology,to improve grinding accuracy,and to increase producing efficiency through revealing circular saw blade end-jump deformation laws and mechanisms,which is a significant research direction in saw blade industry.To solve those problems mentioned,this thesis studies the jump deformation mechanism of circular saw blade through a grinding process experiment with diamond circular saw blades made from 75Cr1 material.The experiment is carried out to discover a grinding method suitable for 75Cr1 material,to establish a tempering quality evaluation system for diamond circular saw blade,and to find out corresponding grinding methods for circular saw blades with different tempering levels.The specific research contents are as follows:(1)The deformation mechanism of circular saw blade in grinding is studied to reveal how the circular saw blade is deformed by different factors such as grinding parameters,clamping force and the residual stress in grinding process.(2)To tackle the diamond circular saw blade deformation problem,five kinds of experiments are carried out: the single factor experiment of grinding,grinding parameters optimization experiment,elastic cushion method of grinding experiment,mechanical clamping grinding experiment,and high speed grinding experiment.By doing experiments be the laws of how processing parameters cause the circular saw blade deformation and the best grinding method suitable for 75Cr1-made circular saw blade obtained,so that engineering personnel can be equipped with theoretical method guidance and technical support.(3)A fuzzy mathematical model to evaluate the tempering quality of diamond saw blades will be established with it based on the analytic hierarchy process(AHP)and fuzzy comprehensive evaluation(FCE).And circular saw blades will be divided into four categories according to the index of the circular saw blade after tempering heat treatment.So that appropriate grinding procedures can be figured out according to the unique features of these four categories of blades,to reduce the production cost,optimize the grinding quality,and improve processing efficiency.