在中距纺纱过程中，三个罗拉承担各自规格的减薄工作，在一次喂入中完成多次

In the middle-pitch spinning process, the three rollers undertake the thinning work of their respective specifications and complete multiple thinning work in one feeding. Mandel rotates at the same speed at a constant speed, and the three rollers feed at the same speed at a constant speed. The blank is driven by the frictional force between the mandrels, flying at a certain speed, and passively rotates with the feed of the rotating wheel. The front-end material gradually rises to its peak value, and is subjected to a combination of spinning extrusion and material constraints. After the forming process is completed, the billet wall thickness decreases and the axial dimension increases. Some scholars have used experimental methods and statistical principles to study the surface quality, special materials and geometric parameters of metal spinning. The experimental method is limited to the discussion of parameters under specific conditions, and there are many limiting factors, making it difficult to detect the forming process. Finite element simulation is a more and more widely used spinning method, which is widely used in the study of key parameters such as fillet radius and exit angle, displacement distribution, stress and strain distribution. It provides a cost-effective method for defect observation and parameter optimization means. Zhang Liqun, Li Xian and others discussed the finite element simulation modeling methods of cutting rotation, head rotation and pipe rotation. <br>Some scholars also mentioned the construction of the distance spinning prediction model. In these simulations, some parameter setting and model simplification methods are provided to improve the calculation efficiency, and the influence of the wrong distance value on the forming process is discussed. However, in the previous research, there are still some problems of improper operation and simplification, which affect the calculation accuracy of the model. Specifically, the geometry of the runner ignores the rounded corners, and it is assumed that during the deformation of the blank, the three rotating wheels are completely symmetrical, and one third of the blank is used for analysis. Tetrahedral elements are used to automatically generate meshes. In the simulation process, the blank and the mandrel are fixed together, so that the three-wheel system is fed according to the spiral trajectory, regardless of the passive rotation of the blank and the runner, and the effect of inertial force is ignored. Ignore truncation error and use single precision calculation. By shortening the calculation termination time and ending the simulation early, parameter extraction is achieved. <br>The above phenomenon is inconsistent with the actual production situation, which affects the accuracy and reliability of the existing literature finite element research results. According to the characteristics of offset printing spinning and according to the actual production situation, it is of great practical significance to establish a reasonable and effective finite element analysis model of offset printing spinning. <br>This chapter is devoted to improving the construction of the prediction model of staggered spinning forming to overcome the deficiencies of the existing models. This laid the foundation for further research on the influence of wheel force distribution, wall thickness and process parameters without interference. The model in this chapter can also provide a reference for thermal dislocation and other similar forms of strong rotation.

In the mid-range spinning process, the three Lola to undertake their own specifications of the thinning work, in a feeding in the completion of a number of thinning work. Mandel rotates at the same speed, and the three rollers feed at the same speed. The blanks are driven by friction between the spindles, fly at a certain speed, and rotate passively with the feed of the rotating wheel. The front-end material gradually rises to peak and is subject to a combined effect of rotary pressure extrusion and material constraints. When the forming process is complete, the thickness of the blank wall decreases and the axial dimensions increase. Some scholars use experimental methods and statistical principles to study the surface mass, special materials and geometric parameters of metal spinforming. The experimental method is limited to the parameter discussion under certain conditions, the limiting factors are more, and it is difficult to detect the forming process. Finite element simulation is a widely used method of rotary pressure research, which is widely used in the study of key parameters such as fillet radius and outlet angle, displacement distribution, stress strain distribution, etc., which provides an economical and effective means for defect observation and parameter optimization. Zhang Liqun, Li Xian, etc. discussed the methods of finite element simulation modeling of cutting rotation, head rotation and pipe rotation.<br>Some scholars have also mentioned the construction of distance cyclone prediction models. In these simulations, some parameter condition settings and model simplification methods are provided to improve the computational efficiency, and the effect of error distance values on the molding process is discussed. However, in the previous study, there are still some problems of improper operation and simplification, which affect the calculation accuracy of the model. Specifically, the geometric contours of the wheels ignore the fillets and assume that the three rotating wheels are completely symmetrical during the deformation of the blanks and that one-third of the blanks are used for analysis. The tetrahethon unit is used to automatically generate the mesh. In the simulation process, the blank and the spindle are fixed together so that the three-wheel system is given in a spiral trajectory, regardless of the passive rotation of the blank slab and wheel, and ignore the influence of inertial forces. The truncation error is ignored and a single-precision calculation is used. Parameter extraction is realized by shortening the calculation termination time and ending the simulation early.<br>The above phenomenon is not in line with the actual production situation, which affects the accuracy and reliability of the research results of the existing literature finite element. According to the characteristics of offset spinning, according to the actual production situation, it is of great practical significance to establish a reasonable and effective analysis model of the finite element of the offset spinning.<br>This chapter is dedicated to improving the construction of staggered spinforming prediction models and overcoming the shortcomings of existing models. This lays down the foundation for further study of the influence of wheel force distribution, wall thickness and process parameters under non-interference conditions. The model in this chapter can also provide reference for thermal dislocation and other similar forms of strong rotation.

In the middle distance spinning process, the three rollers undertake the thinning work of their own specifications and complete the thinning work many times in one feeding. Mandel rotates at the same speed and three rollers feed at the same speed. The rough is driven by the friction between the mandrel, flies at a certain speed, and rotates passively with the feed of the rotary wheel. The front-end material gradually rises to the peak value, which is affected by spinning extrusion and material constraints. After the forming process, the thickness of the blank decreases and the axial dimension increases. Some scholars have studied the surface quality, special materials and geometric parameters of metal spinning by using experimental methods and statistical principles. The experimental method is only limited to the discussion of parameters under specific conditions, and there are many limiting factors, so it is difficult to detect the forming process. Finite element simulation is a more and more widely used spinning research method, which is widely used in the research of key parameters such as fillet radius and exit angle, displacement distribution, stress-strain distribution, etc. it provides an economic and effective means for defect observation and parameter optimization. Zhang Liqun and Li Xian discussed the finite element modeling methods of cutting rotation, head rotation and pipe rotation.<br>Some scholars also mentioned the construction of distance spinning prediction model. In these simulations, some parameter setting and model simplification methods are provided to improve the calculation efficiency, and the influence of wrong distance value on the forming process is discussed. However, in the previous study, there are still some problems of improper operation and simplification, which affect the calculation accuracy of the model. Specifically, the geometric profile of the runner ignores the fillet, and it is assumed that during the deformation process of the blank, three rotating wheels are completely symmetrical, and one third of the blank is used for analysis. Tetrahedral elements are used to generate meshes automatically. In the simulation process, the billet and the mandrel are fixed together to make the three-wheel system feed according to the spiral track, without considering the passive rotation of the billet and the runner, and ignoring the influence of the inertia force. The truncation error is ignored and single precision calculation is adopted. By shortening the calculation termination time and ending the simulation ahead of time, the parameter extraction is realized.<br>The above phenomena are not consistent with the actual production, which affects the accuracy and reliability of the existing literature. According to the characteristics of offset spinning and the actual production situation, it is of great practical significance to establish a reasonable and effective finite element analysis model of offset spinning.<br>This chapter is devoted to improve the construction of the prediction model of cross spinning and overcome the shortcomings of the existing model. This laid a foundation for further study on the influence of the distribution of the wheel force, the wall thickness and the process parameters under the condition of no interference. The model in this chapter can also provide reference for thermal dislocations and other similar forms of strong rotation.