The Dynamic Research Of Diamond Circular Saw Blades Cutting Stone

With the development of social economy and the improvement of people’s living standard,higher and higher quality of life is required by people, all sorts of natural stone is widely used inpeople life in all areas, such as building decoration, road, bridge construction, etc. For thesestone processing, different kinds of diamond tools are needed, and whether diamond tools cangive full play to its cutting performance will influence the stone processing efficiency andprocessing cost directly. In the process of blades cutting stone, stone produces very bigresistance impact to blades, which leads to saw blades vibrating and noising, and it’s easy toproduce resonance when impact frequency is similar to natural frequency, the resonance willaffect service life of blades and stone processing quality. And cutting force is a main parameterto evaluate cutting performance of saw blades, it is the main basis in the machine tool design andcalculation of cutting power consumption, which affects the service life of saw blades directly.So it’s of great significance to study vibration characteristics and cutting force for improvingdiamond saw blades’ service life.They were studied in the paper the diamond circular saw blades dynamic characteristic andcutting force in the saw blade cutting stone process through the experimental method and finiteelement analysis software ANSYS simulation, specific as follows:1、It was studied the dynamic characteristics for diamond circular saw blades. The loworder natural frequency and the main vibration mode were determined through hammerproducing incentive experiment method and ANSYS finite element calculation methodseparately. The more precise nature frequency, modal shape, model damping and dynamiccharacteristics related to vibration noise were got by using DASP-V10experimental modalanalysis software. The natural frequency tested by experiment were compared with finiteelement analysis results to verify the correctness of finite element analysis including finiteelement analysis theory model and analysis method, which fixed foundation of finite elementanalysis and optimization for diamond circular saw blades.2、It was studied dynamic characteristics of blades with different parameters throughANSYS software. Changing structure parameters of saw blades would reduce vibration, noiseand optimize structure parameters of saw blades. The influence of structure parameters onnatural frequency was ensured as follows: natural frequency of saw blades increased withdiameter of flange and thickness of saw blades increasing, but decreased with diameter of flangeincreasing when only changing one parameter and other parameters were all constant.3、It was analysed dynamically the diamond circular saw blades cutting stone processthrough LS-DYNA software. Biggest circumferential stress located on the flange constructedplace while saw blades idling, and maximum equivalent stress changed in a small area while sawblades were in contact with stone. Through the curve about cutting force changing with timeextracted in process of sawing, and compar of cutting force calculated by summarizedexperimental formula and simulation results, the results showed as follows: cutting force got bysimulation and calculated by formula differed not quite, and the finite element simulation model and method were verified rationality on a certain degree，which has provided favorable basis foroptimizating processing technology parameters of blades.4、It was studied the cutting force through LS-PrePost software. The results showed that:cutting force gradually rose when saw blade saw contact with stone at the beginning, and itwould change in a very small range while in a stable cutting stage. Considered a singleprocessing factors on the effect of cutting force and only changed one of the machiningparameters, we got that cutting force increased with cutting depth and feeding speed increasing,but decreased with the spindle speed decreasing. Among them cutting depth had the biggestinfluence on circumferential force, and feeding speed had the biggest influence on normal forceand resultant force.It provided some theoretical basis and reference data in saw blades designing, andprocessing technology parameters making through the research of diamond circular saw bladesvibration characteristics and cutting force; And at the same time through optimizing saw bladestructure parameters and processing technology parameters, which can improve performance ofsaw blades, and can reduce cost, improve machining efficiency. The research results have certainpractical value in engineering for stone products processing.