Method for shot blasting on surface of wheel of passenger vehicle

Abstract

The invention discloses a method for shot blasting on the surface of a wheel of a passenger vehicle. The method is characterized in that the wheel is suspended and hooked through a suspending chain and enters a shot blasting chamber; the distance between suspending hooks is 800 millimeters; the moving speed of the suspending hooks is between 0.5 and 3 meters/minute frequency control; eight shot throwing machines are adopted; the shot throwing amount is 8*280 kilograms/minute; the diameter of a steel shot is 0.8 millimeter; the shot blasting time of each piece is 0.6 minute; each surface of the wheel can be impacted from the direction of 360 degrees so that the surface of the wheel produces elastic and plastic deformation and shows higher residual compressive stress so as to improve the surface strength and fatigue strength of a material of a surface layer of the wheel and the punched edge angle burr of the edge of a radiating hole, a center hole and a bolt hole of the wheel is passivated so as to avoid stress concentration. In the process of shot blasting, the surface layer of the material bears severe impact of the steel shot to produce a strain-hardening layer, thereby causing two effects: 1, the subgrain thinning caused on a tissue and the increase of dislocation density; and 2, the introduction of high macroscopic residual stress. Moreover, for the impact of the steel shot, the surface roughness is increased so that sharp edge produced in processing tends to smoothness. The changes obviously improve fatigue resistance and stress corrosion resistance of the material, thereby obviously improving the service life of the wheel; and the treatment method is validated and obtains excellent effect and economic benefit in production practice of our company.

Description

technical field [0001] The invention relates to a method for shot blasting the surface of a wheel Background technique [0002] The passenger car wheel is an important safety part of the passenger car. It not only carries the torque, but also carries the load. The use of tubeless wheels in foreign commercial vehicles and passenger cars has become very popular. The tubeless passenger car wheels not only adopt the international advanced spinning technology, but also Advanced sheet rolling technology is adopted. With the continuous development of my country's reform and opening up, tubeless wheels will be more and more widely used due to their remarkable safety and comfort, no matter whether they are exported or sold domestically. [0003] After the traditional wheel processing and welding are completed, it enters the coating process, and the oil stains and rust on the wheel surface are removed by pickling. After using this process, the internal stress of the wheel due to stam...

AI Technical Summary

Problems solved by technology

[0004] The powerful shot peening process was first produced in the 1920s. It is mainly used in the military field, gear processing, and engine manufacturing. few applications