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In the spinning process of aluminum spinning products, the trail top force must be moderate. If trail top force is too small, sulg will be relative rotation with core model, even cast from working area and if trail top force is too strong, it will cause bearing overload of principal axis and trail top. Moderate tail top force can also cause a certain amount of deformation to aluminum products. This deformation will change reduction amount during the spinning phase and make the calculation of spinning pressure that force on rotary wheel not accurate, thus affect the whole spinning craft parameter setting, reducing the size accuracy of the spinning products. This article will carry on the simulation analysis through the deformation of slug on the trail top force and determine the relationship between the trail top force and the amount of reduction during the spinning stage. On the basis of large of craft experiments and simulation, the parameters of the Thamasett algorithm is be amended and this makes the new algorithm that calculate the spinning pressure that force on rotary wheel more accurate. Using the results of new calculation algorithm spinning pressure to set spinning craft parameter, we carry on craft experiment to aluminum blank. And the results show that taking consideration of variation of the reduction amount caused by the trail top force, the size accuracy of aluminum spinning products is slightly increased.

The Impact on Dimensional Accuracy of Spinning Products Given by Top End Force