摘要
金刚石六面顶压机的关键零件铰链梁工作中受变载荷作用,易出现疲劳破坏。生产中常依据静强度进行类比设计。应用有限元理论研究铰链梁的疲劳强度,分析铰链梁工作中的应力与变形分布,并对常规方法,基于静强度结构优化后,基于疲劳强度结构优化后的铰链梁的应力与变形作对比与分析。研究结果表明,铰链梁中最大应力发生在凸耳处,与类比设计相比,基于疲劳强度结构优化设计后的铰链梁体积减少15.7%,最大等效应力降低10.2%,疲劳安全系数提高10.86%;相对于基于静强度结构优化方案,基于疲劳强度结构优化设计后的铰链梁体积有所增加,最大等效应力降低52.6%,基于静强度优化后,铰链梁中应力循环次数表示的寿命2.4×105次,基于疲劳强度的优化方案铰链梁寿命超过107次,该研究可为铰链梁的设计提供有益的参考。
The hinge sleeve is the key part of the diamond cubic press, now its design bases on the static strength and the analogizing design. This part works under variable load, so it is easy to create fatigue rupture. In this paper, by means of finite element method（ FEM）, the fatigue strength of the hinge sleeve is studied , the stress value and distribution is analyzed. And the stress and distortion of the hinge sleeve are compared and analyzed, which the hinge sleeves are designed respectively by means of conventional design（ CD）, optimization design only based on the static strength（ ODSS）, or optimization design based on the static and fatigue strength（ODFS）. The results showed that the maximum stress is in the lug. Relative to CD method, the solidity of the hinge sleeve designed by ODFS was reduced by 15.7% ,the maximal equivalent Von Mises stress reduced by 10.2% ,the fatigue safety factor advanced by 10.86%. Compared with ODSS,the solidity of the hinge sleeve designed by ODFS advanced a little,but the maximal equivalent Von Mises stress was reduced by 52.6%. The fatigue-life of the hinge sleeve designed by ODSS is 2.4 × 10^5 degree , and the fatigue-life of the hinge sleeve designed by ODFS exceeds 10^7 degree. The results are helpful to design the hinge sleeve.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2006年第4期38-42,共5页
Diamond & Abrasives Engineering
基金
河南省科学技术厅立项资助的攻关项目
项目编号为20001110106
