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数控热拉伸蠕变复合成形是一种精确成形钛合金薄壁零件的新技术。该技术采用自阻加热等加热方法将先进轻质钛合金薄壁板材或型材坯料加热至热成形温度后进行数控热拉伸弯曲成形,然后适量补拉工件,接着在保温阶段保持工件贴模使材料蠕变,工件内应力发生在线松弛,从而达到减小回弹,提高零件成形精度的目的。系统介绍了钛合金薄壁零件数控热拉伸蠕变复合成形新技术的研究现状、工艺原理、关键装备、工艺技术及其优缺点,并指出了这种新技术的未来应用前景。
Numerical Control Hot Tensile Creep Forming is a new technique for precisely shaping thin-walled titanium alloy parts. The technology uses self-resist heating and other heating methods will be advanced light titanium alloy thin-walled plate or profile blanks heated to hot forming temperature after CNC hot stretch bending forming, and then to pull the right amount of workpieces, and then keep the workpiece in the insulation stage mold so that Material creep, stress relaxation occurs online within the workpiece, so as to reduce the rebound and improve the accuracy of parts forming purposes. The research status, process principle, key equipment, process technology and its advantages and disadvantages are introduced systematically. The future application prospect of this new technology is also pointed out.