Method for calculating safety factor of bead rings of all-steel radial tire

Abstract

The invention relates to the field of calculation of safety factor of bead rings of an all-steel radial tire, in particular to a method for calculating the safety factor of the bead rings of the all-steel radial tire. The method for calculating the safety factor of the bead rings of the all-steel radial tire comprises steps as follows: 1), data of the breaking force B of a single cord, the number U of the bead rings and the peripheral force F of the bead rings are acquired; and 2), the safety factor of the bead rings is calculated according to the formula as follows: wherein Wc represents the safety factor of the bead rings, B represents the breaking force (N) of a single steel wire of each bead ring, U represents the number of the wound bead rings, and F represents the peripheral force (N) of the bead rings. According to the method, the safety factor is more consistent with the actual hydraulic bursting test value, the deviation is controlled in the range of 5%-10%, and the calculation accuracy is greatly improved.

Description

technical field [0001] The invention relates to the field of calculating the bead ring safety factor of an all-steel radial tire, in particular to a method for calculating the bead ring safety factor of an all-steel radial tire. Background technique [0002] Tires are an important part of the vehicle's driving structure. With the rapid development of the automobile industry, the automobile industry has higher and higher requirements for tire performance. The technical status of tires has a direct impact on the safety, power and driving stability of the car. At the present stage, all-steel radial tires with good wear resistance and fuel economy are gradually replacing bias rubber tires, have achieved rapid development, and have become the mainstream products in the tire industry. However, the safety and stability of the bead during the running of the all-steel radial tire will seriously affect the performance and service life of the tire, so the safety multiple calculation o...

AI Technical Summary

Problems solved by technology

[0009] A large number of tests and analyzes have been carried out on the cause of the product due to the defects of broken wires and broken wires in the market. Through a large number of hydraulic blasting tests, it is found that the safety factor of bead wire breakage is 20%~30% different from the calculated value of the above formula. , the calculated value of formula (1) is too large