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工艺参数对双层波纹管液压胀形回弹有重要影响。为提高波纹管成形的精度,基于ABAQUS平台,对双层波纹管液压胀形及回弹过程进行仿真分析,研究了内压力、模具行程和挤压速度对不同膨胀比波纹管回弹后的长度、波高和波厚的影响。结果表明,内压力和模具行程增大时,波纹管长度变化量、波高变化量和波厚变化量均基本呈线性增大趋势,且长度和波厚的变化量远大于波高变化量;内压力对回弹的影响大于模具行程的影响;回弹量对工艺参数的敏感性随膨胀比的增大而增大。对于膨胀比为1.47的波纹管,内压力增大150%时,波纹管长度、波高和波厚变化量分别增大了119%,175%和167%。模具行程增大20%时,波纹管长度、波高和波厚变化量分别增大了26%,18%和29%。
The process parameters have an important influence on the double bulging hydraulic bulging springback. In order to improve the precision of corrugated pipe forming, the hydraulic bulging and rebound process of double-layer corrugated pipe was simulated and analyzed based on ABAQUS platform. The effects of internal pressure, die stroke and extrusion speed on the rebound length , Wave height and wave thickness. The results show that when the internal pressure and the die stroke increase, the change of the length, the wave height and the thickness of the corrugated pipe basically increase linearly, and the variation of the length and thickness is much larger than that of the wave height. The internal pressure The impact on the springback is greater than the impact of the die stroke; the sensitivity of springback to the process parameters increases with the expansion ratio. For the bellows with an expansion ratio of 1.47, the change in bellows length, wave height and wave thickness increased by 119%, 175% and 167%, respectively, when the internal pressure increased by 150%. When the die stroke increased by 20%, the variation of bellows length, wave height and wave thickness increased by 26%, 18% and 29% respectively.