锻压技术

石油钻具接头分步成形工艺研究

英文标题：Research on multi-step forming process for joint of petroleum drilling rig

作者：杨向东徐新成田娇赵中华

分类号：

出版年,卷(期):页码：2014,39(10):20-24

摘要：

以刚粘塑性原理为依据，利用Deform-3D有限元分析软件对石油钻具接头成形过程进行数值模拟，分析成形过程中的金属流动、应力场和载荷规律，为石油钻具接头成形工艺优化提供依据。石油钻具接头采用改进后的分步成形工艺，成功解决了其水平分模对向挤压连皮位置难确定的难题，得到了成形质量非常好的锥形端部，并且锻件形状更接近零件形状，不仅可以达到减少成形力、节约材料的目的，而且使得金属流线沿锥形分布，可以减少切屑加工时金属流线露头，有利于提高锥形处螺纹的强度，提高石油钻具接头的寿命。

Based on the finite element theory for rigidity visco-plasticity, the forming process for joint of petroleum drilling rig was simulated through Deform-3D, and then the laws of material flow, stress field and load during the forming process were analyzed which provided the basis for the forming process optimization of joint of petroleum drilling rig. Using the optimized process of multi-step forming for joint of petroleum drilling rig, the critical problem of the location of horizontal sub-mold subtended hot extrusion was successfully solved, the better forming quality of the coning part was obtained, and the shape of forgings was closer to the shape of working part. Not only the forming force is deduced and material is saved, but also the distribution of the metal flow is along the cone, which decreases the exposed metal flow during the process of machining to improve the strength of thread on the coning part and the service life for joint of petroleum drilling rig.

基金项目：

上海市宝山区科学技术委员会产学研合作项目:石油钻具关键零件精密塑性成形技术与数值仿真项目（CXY-2012 -19）；上海市085内涵建设项目（nhjx-2014-11）

杨向东(1987-),男，硕士研究生

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