管坯镦锻工艺仿真及优化

管坯镦锻制品是石油、钻探等机械设备的关键部件，要求具有很高的强度、抗拉性能及抗疲劳性能。在实际生产中，管坯成形过程很容易产生失稳、内部凹陷甚至折叠。而且坯料体积不易控制。使得锻件成形困难，锻件质量得不到保证。本文采用Deform-3D塑性有限元分析软件，以钻杆头部镦锻为例对管料的镦锻成形工艺过程进行了模拟和分析．并针对原有成形工艺中出现的问题进行了改进和优化。运用Deform-3D系统模拟的油管与生产实际基本吻合，因此，该模拟结果及其参数可用于钻杆头部镦锻模的设计。

Simulation and optimization of the upset forging process of tube parts

The tube forging is the important part of mechanical equipment,such as petroleum and drilling industries,so it is requested to have the high intensity,high anti-pull and anti-fatigue properties.During the upset forging of tube parts,it is easy to occur the instability and enfold.At the same time,the forging blank volume is hard to control,which makes the forming difficult and forging quality hard to control.In this paper,the upset forging tube part's forming process is simulated and analyzed by the Deform-3D software,meanwhile,the defects are predicted.Based on the simulating results,the original forming progress and the die structure are improved and optimized.The simulation results using the Deform-3D software have a good agreement with the experimental results.So the simulation results and its processing parameters have a good guide for designing the head upsetting die of the drill pipe.