Qingdao xinyuanzhu Group Co., Ltd.

A brake drum is a cast iron piece shaped like a bell drum that is fixed with a tire and rotates at the same speed. Use oil pressure to push Blake Shoes into contact with the inner edge of the brake drum, and use the friction generated by the contact to suppress the rotation of the tire in order to achieve the purpose of braking. When the drum body does not produce thermal cracks, casting also does not have quality defects, then the general quality of the brake drum can be called "brake not broken" only because the brake drum is a brittle gray cast iron material and works in high temperature and high pressure environment, the formation of fatigue cracks on its surface is the physical characteristics of cast iron material, irresistible objective law. With the extension and penetration of cracks on the drum body, the mechanical strength of the drum body declines sharply, and eventually the brake breaks.