Technical Study On Spinning Process Of A356 Aluminum Alloy Wheel Hub

The huge economic and environmental benefits of car lightweight are obvious.The lightweight of the car has become the most important trend in the world’s automotive industry development.The use of aluminum alloy wheels has been widely used in the automotive industry.Recently,the manufacture of aluminum alloy wheels is one of the main research contents of the automotive industry.In today’s increasingly competitive market,the numerical simulation analysis will play an increasingly important role in the design and development of aluminum wheel products,and will be paid more and more attention.And the final results of numerical simulation analysis have broad application prospects in the car industry.In this paper,numerical simulation analysis of the casting spinning technology model for aluminum alloy wheels was carried out by using UG and MSC.SuperForm/SuperForge software.And based on the numerical simulation of the aluminum alloy wheel,the cast spinning technology and followed with manufacturing and experimental tests were carried out and investigated in detail.The effects of spinning deformation on the microstructure and properties of A356 aluminum alloy wheels were also studied.By comparing the simulation results and the actual production and the test results,it proved the feasibility and accuracy of the numerical simulation in the aluminum alloy wheel production process.The results showed that through the simulation analysis of the spinning process of cast spinning aluminum wheel,the optimal process parameters were accurately predicted.The optimum spinning process parameters are spinning temperature with 400 ℃,spindle speed with 400 r / min.And the feed rate is 1.2 mm / r and the reduction rate is 30%.In the spinning process,the stress is distributed in a ring around the contact area between the rotating wheel and the workpiece.The strain is mainly distributed along the circumference of the wheel hub.The stress and strain at the contact position between the rotating wheel and the workpiece are maximum.By comparing the surface formability of the wheels at different reduction rates,it is found that the A356 aluminum alloy wheels have the best formability at 30% reduction rate.As the spinning process makes the fiber in the processing zone,α-Al grains are elongated,eutectic Si particles are distributed in the intergranular,the morphology of the organization to promote the material has excellent mechanical properties.By comparing the defects in the wheel before and after spinning,it was found that the defects inside the rim were drastically reduced by spinning.Due to the combined effect of a large amount of strain and high temperature during deformation,hot spinning process is an effective measure to eliminate defects in cast aluminum wheels.