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The spinning forming spun seamless hollow rotary parts , deformation conditions are good , excellent product performance , dimensional tolerances , high material utilization , and a broad range of products , widely used in precision metal weapons , aviation , aerospace , civil processing technology. Many factors that affect the quality of products in the actual production process , the reasonable match between the various parameters need craft workers in the pilot production trial and error debugging. Using the finite element numerical simulation technology can reduce costs , improve productivity , and provide guidance for the process design and experimental studies . Spinning and cylindrical products with rib barrel with spinning process , based on the MSC.Marc per platform , established a three - dimensional finite element model of the spinning process , and its forming mechanism and process the influence of parameters of the forming process . First, based on the finite element theory , the blank using hexahedral unit divided mesh grid tail top , mandrel and spin round carried a model of discrete technology , and effectively solve the frictional contact , boundary constraints and rotary trajectory and other key issues . Thereby establishing a reasonable barrel with the spinning forming finite element model . Based on the model to obtain the cylindrical external the spinning deformation process stress field , strain field distribution law . Of the the spinning way and the process parameters of the spin pressure and the quality of the workpiece the impact . For the the positive spinning process of TC4 titanium alloy , the research results show : With the rate of thinning , the feed ratio and fillet radius increase , the direction of the spin pressure showed an increasing trend , radial spin pressure increase rate ; increase forming angle , the total spin pressure and radial spin pressure was significantly reduced, while the axial spin pressure tended to increase . By simulating rib barrel with the research with the spinning forming the basic law and the spinning force trends . Analysis of different thinning rate and feed ratio of the metal flow , the height of the workpiece dimensional accuracy and inner ribs . The study concluded that: With the thinning rate increases , the accuracy of workpiece dimensions reduced, the height of the inner rib is slightly increased ; When the feed ratio in a smaller range , increasing the feed ratio ( less than 1.5mm / r) , the outer The diameter dimension accuracy is significantly improved, while the height of the inner ribs significantly reduced .
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