摘要
在建立了45钢环形结构件连续驱动摩擦焊的二维热力耦合有限元模型的基础上,研究了焊接过程中的温度场与材料流动对飞边形成的影响规律.结果表明,在摩擦阶段,材料主要沿轴向流动,而径向流动基本上为0;在顶锻阶段,在大的轴向顶锻压力的挤压作用下,摩擦面边缘及其附近的材料主要沿径向向摩擦面外流动并形成飞边,且飞边的尺寸与弯曲程度随焊接时间的增加而增加.同时,增加旋转频率以及轴向顶锻压力会导致飞边尺寸与弯曲程度的增加;基于飞边形貌给出了45钢环节结构件连续驱动摩擦焊的合理焊接工艺参数.
The 2D coupled thermo-mechanical model was established to numerically simulate the effects of temperature and material flow on the flash formation of ring parts during continuous driven friction welding. The calculated results show that the material in friction stage mainly flew axially, while the radial velocity was nearly zero. During the forging stage, the material in or near the edge of friction surface mainly flew along the radial direction under large axial forging pressure, which resulted in the formation of flash. And the dimensions and bending degree of the flash increased with increasing of welding time, rotating speed and axial forging pressure. Based on the shape of flashes, suitable welding parameters were determined for continuous driven friction welding of 45 steel ring structures.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2013年第4期31-34,114,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(61074090)
关键词
连续驱动摩擦焊
材料流动
飞边
数值模拟
continuous driven friction welding
material flow
flash
numerical simulation
