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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 principle of just viscoplasticity, Deform-3D finite element analysis software was used to simulate the forming process of the oil drilling tool, and the metal flow, stress field and load law during the forming process were analyzed to provide the optimization for the forming process of the oil drilling tool. in accordance with. Oil drilling tool joint improved step-by-step forming process, the successful solution to the level of split against the location of the extrusion skin is difficult to determine the difficult to get a very good quality cone shaped end, and the shape closer to the forging parts Shape can not only reduce the forming force and save the material purpose, but also make the metal streamline distribute along the taper, which can reduce the outcrop of the metal flow in the chip processing, improve the strength of the thread on the taper, life.