The Analysis And Optimization Of Key Para- Meters In Tube Spinning Process

In the field of large-diameter thin-walled parts with high precision manufacturing, spinning is considered to be one of the most effective method, which has unparalleled advantages such as saves more materials, has higher precision products with a good overall performance, improves the material utilization and has a broad application area Compared with other processing methods. In many important sectors of the national economy, for instance, in the high-precision manufacturing field such as aviation, aerospace, weapon, etc. it plays a dominant role.Meanwhile, tube spinning belongs to large deformation plastic forming process, the forming mechanism is very complex, the forming quality is affected by so many process parameters such as the material properties, thinning ratio, roller pass, spinning temperature, mandrel rotation, roller geometry (shape, forming angel, tip radius, smooth angel) etc. With the increasing demand for modern spinning tube, how to optimize the spinning process parameters to obtain a better forming quality has become a urgent problem which must be solved.The main contents of this paper are as follows:The principles and characteristics of spinning technology are introduced, the main problem of tube spinning has been reviewed, the classification of the spinning, the research methods, and the research contents are outlined. In addition, the internal and external research situation were illustrated, then the background and significance of this topic were described, at last, the research contents of this paper are given out.The mechanism of tube spinning was illustrated, the spinning process was classified into three phases, and the deformation area was classified into three parts. The plastic deformation of the metal was pointed out, and the contact area between rollers and blank and the spinning forces were given out by formulation. At last, the stress and strain distribution during spinning process were analyzed.Explored the model building of tube spinning. The theoretical basis of tube spinning deformation was analyzed, a finite element model which accorded with the actual production was built by using the commercial software—ANSYS/LS-DYNA explicit platform. And the availability of the model was verified.The evaluation criterion of forming quality was proposed, the effect of key process parameters (feed rate, thinning rate) and roller parameters (forming angel, geometry) on spinning forces, stress and strain, and wall thickness were analyzed by using single-factor method respectively.Based on the single-factor method, several orthogonal tests were conducted by using Taguchi optimization design method to study the effect of feed rate, thinning rate and roller forming angel on workpiece, the optimal parameters were obtained by using range analysis and comprehensive evaluation method.Finally, the research results of this subject were summarized, and the future research direction were expected.