The MPM limited mandrel unit has a variety of technical problems, such as uneven wall thickness, rolling cards, inner straights, and an outer diameter that is too poor. Therefore, how to optimize the parameters of steel pipe production conditions, reduce the production quality accidents of steel pipes, and improve the quality of steel pipes are urgent problems to be solved. The laws and theories obtained from the field and experiments are difficult to cover in all aspects and are costly. Therefore, it is necessary to study the rolling process of seamless steel tubes by numerical simulation method. Rolling speed and the key factor affecting the quality of the 5-stand MPM rolling product, the roll gap value, was studied. A relative numerical simulation design method was used to establish a numerical simulation scheme to study the key adjustable parameters (roll gap value and rolling speed). ) With regard to the influence of continuous rolling force and metal stacking, a finite element model of the seamless steel tube rolling process was established through the MARC platform to study its effect on rolling force and wall thickness in the rolling process.
The scholars of Nanhua University adopt the relative equal-load design method to solve the problems of the low rolling mill efficiency, steel metal accumulation, cracking and pull-convex problems that are easily caused by the mismatch between the rolling load and the roll speed in the continuous rolling process of the MPM mandrel. A numerical simulation program was established to study the effects of key adjustable parameters (roll gap value and rolling speed) on the rolling force and metal stacking. The results of the study indicate that the rolling force can be reduced by appropriately increasing the value of the roll gap at which the rolling force is excessively large. On the contrary, the rolling force can be increased, and the rolling speed of the corresponding roll can be adjusted and the metal can be solved. Stacking problems. Field test data verify the correctness of the finite element model. According to the parameters obtained after optimization, the model was established and the rolling force was simulated and compared.
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The scholars of Nanhua University adopt the relative equal-load design method to solve the problems of the low rolling mill efficiency, steel metal accumulation, cracking and pull-convex problems that are easily caused by the mismatch between the rolling load and the roll speed in the continuous rolling process of the MPM mandrel. A numerical simulation program was established to study the effects of key adjustable parameters (roll gap value and rolling speed) on the rolling force and metal stacking. The results of the study indicate that the rolling force can be reduced by appropriately increasing the value of the roll gap at which the rolling force is excessively large. On the contrary, the rolling force can be increased, and the rolling speed of the corresponding roll can be adjusted and the metal can be solved. Stacking problems. Field test data verify the correctness of the finite element model. According to the parameters obtained after optimization, the model was established and the rolling force was simulated and compared.
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