Regarding the ball mill as a rotary body being composed of end covers and barrel shell

a finite element calculation model has been established by cutting 1/4 of the said shell

the medium loads of different weight being transplanted on elements of the shell. Through finiteelement analysis

the influencing data of medium weight variation upon end cover stress of the ball mill are obtained. Results show that the corresponding stress values at transition rounded corner of the end cover increase along with continuous increament of the medium weight. Among them

the corresponding stress at f point is the maximum under different medium weight conditions; Under four load conditions

the maximum alternating stress has been all occurred at f point

the relationship between max. corresponding strees δ f_ r3d and medium weight may be approximately regarded as a linear equation.