钻柱转换接头是石油钻具产品中的一类关键件,其安全可靠性要求很高。转换接头主要材料为40CrMnMo、4145H和40CrNiMoA钢,其体积和质量较大,工件外形如图1所示。为保证安全可靠,综合力学性能要求很高,产品的技术要求和取样标准见表1。按毕氏准数Bi划分薄件厚度极限可达280mm,堆放 Drill-pipe adapter is a kind of key part in oil drilling products, which requires high safety and reliability. The main material conversion adapter 40CrMnMo, 4145H and 40CrNiMoA steel, the larger the volume and quality, the workpiece shape shown in Figure 1. In order to ensure the safety and reliability, the comprehensive mechanical performance requirements are very high. The technical requirements and sampling standards of the products are shown in Table 1. By Bi Punch bi standard thin thickness limit of up to 280mm, stacked