Experimental Research On The Control Of The Vibration And Noise Of The Diamond Saw Blade

Diamond circular saw blade has become the most important cutting tool duringthe stone machining and has been used widely in cutting stones. Diamond saw bladehas a large radius-thickness ratio which makes it one of the typical thin plate tools. Inorder to save the stone resources and reduce the pollution, ultra-thin diamond sawblade is its main direction of development. Due to its low lateral stiffness, the sawblade causes large deformation, severe vibrations and loud noise, which lead to thelower quality of the plate, the faster abrasion of the segments and a shorter life of thesaw blade. How to control the deformation of the saw blade and reduce its cuttingnoise to stabilize the saw blade has been an important topic in the stone machiningarea.In this thesis, the diamond saw blade’s axial deformation and the cutting noisehave been separately monitored by two eddy current transducers and a microphoneduring cutting granite. The axial deformation and vibration of the saw blade’s threepositions, which are the cut-in, the middle and the cut-out of the cutting course, havebeen analyzed with the cutting noise. Install a auxiliary support controller on the firsttwo positions to enhance the saw blade’s stiffness and control its axial deformation.The saw blade’s axial deformation and vibration have been monitored and analyzed,under different combination of cutting parameters (peripheral speed, feeding velocityand sawing depth) with the cutting noise to investigate the controller’s influence tothe saw blade’s cutting stabilization. The main results of the study are summarized asfollows:(1). Before the installation of the controller, the axial deflection of the cut-in positionsof the saw blade is larger than the other two positions, and the axial deflection of themiddle position is the smallest. Comparing respective vibration of the three positionsduring the idling, the vibration of the cut-in and cut-out positions is enhanced, and theone of the middle position is lower during the middle of cutting course. The peak ofthe cutting noise emerges at the cut-in position, and at the time before cutting out thenoise reduces and then arises during the middle of the cutting course. (2).Based on the synthesis of the influence of the controller to the axial deformation,vibration and cutting noise, the appropriate controlling force is7N while peripheralspeed is30m/s, and3.5N while peripheral speed is40m/s.(3).Comparing the hardness of coating of the directive wheel is95HA, the controllerhas a better controlling effect when the hardness is75HA.(4).The controller reduces the axial deformation of the saw blade and the cuttingnoise. The controller is placed on the cut-in position gets a lower axial deflection andcutting noise than it is placed on the middle position.