Combined grinding ball

摘要: The invention discloses a combined grinding ball. ball comprises two hemispherical shells. Each shell alloy abrasion-resistant layer. A steel layer is arranged on the inner side of each first extension edge in one shell, and second other shell. thread layer, engaged with According to ball, shells are connected through thread, connecting columns, thus cannot be separated easily; lead adopted can impact layers, so that made move irregularly aimlessly, accordingly uniform guaranteed, effect good; design protrusion units, improved; simple structure low cost.