Research on New Type LG550 Three-roll Cold-rolling Pipe Mill

The equipment configuration of the new type LG550 three-roll cold-rolling pipe mill is elaborated;the rolling process parameters of the mill is determined;and the motion characteristics of the swing link mechanism of the main drive system is studied to set up relevant parameters thereof. The characteristics of rolling force variation in the rolling process is simulated by means of the infinite element method. The analysis result leads to such a conclusion that the new type cold-rolling pipe mill is capable of rolling operation with variable cross-section groove of the two-roll pipe mill,and accurately-adjusted rolling radius,having been satisfactory to the process requirements,and suitable for rolling of large-sized seamless steel pipes.