锻压技术

钻杆六方接头加工工艺及受扭力学分析

英文标题：Processing technology and torsional performance analysis on hexagonal drill pipe joint

关键词：锻造钻杆接头 ABAQUS 扭矩

分类号：

出版年,卷(期):页码：2016,41(7):152-156

摘要：

介绍了螺旋钻杆六方接头的加工工艺，并应用ABAQUS软件对接头的受扭特性进行分析，结果表明：最大Mises等效应力多发生在几何突变处，并且此值小于屈服极限。母接头Mises等效应力大小是公接头的2.34倍，在反复受扭状态下母接头容易先发生破坏，所以在材料上应优先对母接头进行强化。传递扭矩时，公、母接头只有一部分区域发生接触并传递扭矩，其余部分没有发生直接接触不是主要受载区域。通过扭矩实验验证了仿真结果的正确性，六方接头可以传递较大的扭矩而不发生破坏，扭矩超出10000 N·m时从焊缝处发生断裂。

The processing technology of the spiral drill pipe joint was described，and the torsional characteristic of the joint was analyzed by means of software ABAQUS. The results show that the maximum Mises equivalent stress occurs on the geometry mutation, and is less than the yield limit. However, the Mises equivalent stress of female joint is 2.34 times that of the male joint, and the failure of female joint occurs easily under the repeated torsional condition, so the material of female joint should be strengthened preferentially. Furthermore, during torque transmission，only partial regions of the female and male joints are in contact and transmitted torque, and the rest regions are not mainly loaded regions without directly contact. The correctness of the simulation results is verified by torque experiment. Hexagonal joints can transmit bigger torque without damage, and the weld fracture occurs when the torque exceeds 10000 N·m.

基金项目：

山西省回国留学人员科研资助项目(2013-40)；太原理工大学引进人才基金(900103-0301395)

田富强（1990-），男，硕士研究生

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