The Research Of Servo Turning Tool System Based On Sine Mechanism

The crankshaft machining complex lathe turned the crank arm journal with the way of servo turning methods. The lathe used sine mechanism to achieve servo turning. By analyzed the processing of servo turning,two necessary conditions of completing the servo cutting was Summed up. Using the ADAMS software to simulate the system composed of sine turret mechanism and crankshaft in order to calculate the trajectory of the tip point in the process of cutting motion and prove the sine mechanism to meet the two necessary conditions for servo turning. After that, it did further study on relative motion between vertex of tool and point of the crank arm journal by using ADAMS software. When the crankshaft and tool mount mechanism made synchronous rotation, the trajectory of vertex of tool was also a circle which had the same radius as crank arm journal. All this study concluded that the sine mechanism could finish the turning methods of the crank arm.The crank of Turret must equal to the length of side arm of crankshaft, it need to change the length of crank of turret when processed different crankshaft. The way of changing the length of crank had been determined. The crank had been interrupted and been connection with rotation pair, then it made change by changing the positional relationship of two parts. Specific adjustment processing had been analyzed, and the rotation angle of crank had been calculated at the same time. At last completing the design of the turret, and establishing the three-dimensional model of the turret in Pro/E software.Do the kinematical analysis of the sine institutions to solve the speed and acceleration of every parts of the sine institutions. The three-dimensional model of turret should be imported into ADAMS software. Then, do the virtual simulation, to verify the results of kinematical analysis, and do the analysis of the inertia force of the movement. According to the results of the simulation analysis of the turret, we should determine the overall program of body balancing and design the dynamic balancing device. Finally, the three-dimensional of turret installed the inertia force balancing device was imported into ADAMS software in order to verify the effect of balancing devices, and the results of the simulation should be evaluated.Did the finite element analysis of important parts of the turret, and calculated the displacement and stress and strain of nodes of cutter. We also did the modal analysis, and calculated the natural frequency and the modes of the cutter.At last, we should evaluate the results of finite element analysis and the results show that the design of the cutter is reasonable.All the results can provide a reference for structural improvements.