论文部分内容阅读
针对薄辐板厚轮缘盘形件提出一种局部加热旋压增厚成形方法。通过数学建模,得到了变形前沿即加热热源位置随时间变化的规律并给出了相应的加热功率,计算结果表明,在增厚过程中火焰喷枪近似匀速向圆板中心推进,在历经不同温度分区时,需要施以不同功率才能使变形前沿温度达到目标温度。以半径191 mm、厚度2.5 mm的圆形板料为例进行工艺实验,实验中,旋轮沿径向向内进给压缩轮缘的同时,火焰随着变形区前沿的变化而向内移动。实验结果表明,局部加热能使工件心部支撑材料保持足够的刚度抵抗失稳的产生,单道次增厚比可以达到2以上,与冷旋相比,能显著提高增厚效率。
A method of local heating spinning and thickened forming is proposed for thin radial plate thick rim disk. Through the mathematical modeling, the rule that the position of the heating source changes with time is obtained and the corresponding heating power is obtained. The calculation results show that the flame spray gun advances toward the center of the disc approximately uniformly at the same time, When partitioning, different power needs to be applied to make the deformation front temperature reach the target temperature. Taking a round plate with a radius of 191 mm and a thickness of 2.5 mm as an example, a process experiment was carried out. In the experiment, while the rotating wheel was feeding the compressed rim radially inwardly, the flame moved inward with the change of the front of the deformation zone. The experimental results show that the local heating can make the core support material maintain the sufficient rigidity to resist the instability, and the single-pass thickened ratio can reach more than 2, which can significantly increase the thickening efficiency compared with the cold rotation.