弹带径向摩擦焊研究-材料加工工程专业论文.docxVIP

重庆大学硕士学位论文英文摘要 重庆大学硕士学位论文 英文摘要 IV IV of small-caliber shells and theory guidance in experimental design. Meanwhile, up-build the suitable calculation model based on the finite element software ANSYS and 36 times developed simulation program, the establishment of a suitable calculation model, and numerical simulate the stress and strain, the relative displacement of the two gripping models grip in the welding process. Finally, compare and analyze the gotten distribution of stress and strain, And meanwhile, elicit the curve and relationship function between the clamping force and the maximum allowable friction torque in the welding of two kinds of griping model with the disposal of the numerical simulation results using professional graphics software Origin. The results show that: the improved model is superior to the traditional clamp clamping model from the clamping stress and strain state, the anti-twisting of clamping model. In the improved model of the gripping clamp, the maximum allowable friction torque and axial clamp force and radial clamp force met: For a range from 51.5 ~ 54.2, and b range from 121 to 124. M max ??a * P1 ??b * P2 The research project received acknowledgement from the Institute of China Ordnance Industry 59，and over-passed the acceptance management recognition and has been used in production. Key words: Radial Friction Welding, Shell, Clamp Model, Numerical Simulation, ANSYS 重庆大学硕士学位论文1 重庆大学硕士学位论文 1 绪 论 PAGE PAGE 10 1 绪论 1.1 本课题背景 兵器制造业中的弹带是各种弹丸的密封件，是炮弹弹体结构中的重要组成部 分，在炮弹发射过程中，弹带在发射火药的推动力作用下被压入炮筒膛线，带着 炮体在旋转状态中沿膛线运动并向前飞出，这种旋转作用有效地保证了炮弹飞行 的稳定性而能准确地命中目标。随着现代化战争的发展，薄壁弹的广泛应用，对 弹体的改进和弹带的装配工艺要求越来越高。 国内外对弹带装配工艺的研究主要有以下几种[1]： ① 传统机械连接工艺 该工艺过程中，弹体需开槽滚花，需要对弹带进行退火处理然后压入弹带槽， 装配完后弹带组织硬度(硬度值：紫铜 Hv0.1 可达 100 左右；组织成分：冷作硬 化组织) 较高,是目前广泛应用的装配工艺。由于弹体上开槽将会产生应力集中， 影响弹体强度。要保证弹体强度就必须增加环槽处的壁厚，