brake drum (brakedrum), is mounted on the vehicle hub, the wheel rotates together with the member, is part of a drum brake system.
1. The brake drum Material
is generally made brake drum iron HT200-300 (i.e., gray cast iron), the matrix structure mainly pearlite and a small amount of ferrite, cementite, graphite the main class a, a long sheet-shape, a length of 4-6 rating, the heat dissipation, increasing the frictional performance, the braking effect of reducing noise.
2. The raw materials and production process
blank casting drum brake conventional production process; main raw materials required are generally pig iron, scrap iron, and melted, in order to improve the casting performance, will also add some alloys, such as Cu, Cr and the like.
3. The brake drum works
When the brakes, two pairs of half-moon shape of brake shoe by pressure applied to the piston, so that close contact with the inner wall of tympanic, produced therebetween by great friction wheel stops rotating, to achieve the braking purposes.
