锻压技术

钛合金曲面类零件的热冲压工艺

英文标题：Hot stamping process of titanium alloy curved surface parts

作者：胡云1 林彬2

分类号：TG386

出版年,卷(期):页码：2023,48(3):95-98

摘要：

为了解决钛合金钣金件成形困难、易起皱、易破裂等问题，以异形曲面钛合金钣金件为研究对象，给出了热成形工艺方案。首先采用热冲压预制零件的主体部分，然后采用热校形工艺调整头部折弯边角度；进一步通过正交试验方法建立了正交试验组，采用极差分析法确定了各因素影响程度的主次关系，并得到了最优的工艺参数水平组合；最后,通过试验验证了工艺参数的有效性。研究结果表明：成形温度对钣金件成形质量的影响较大，温度过低，容易起皱，温度过高，软化严重，成形精度不高,TA15钛合金的最优成形温度为670 ℃；最优工艺参数组合下，钣金件厚度较均匀，最大偏差仅为0.1 mm,说明热冲压成形工艺可以满足钛合金曲面类零件的厚度要求。

In order to solve the problems of difficult forming, easy wrinkling and easy cracking of titanium alloy sheet metal parts, for the special-shaped curved surface sheet metal parts of titanium alloy, the hot forming process scheme was given. Firstly, the main part of parts was prefabricated by hot stamping, and then the bending angle of head was adjusted by hot sizing process. Furthermore, the orthogonal test groups were established by orthogonal test method, and the primary and secondary relationship for the influence degree of each factor was determined by range analysis method to obtain the optimal combination of process parameters. Finally, the effectiveness of the process parameters was verified by tests. The research results show that the forming temperature has a great influence on the forming quality of sheet metal parts. If the temperature is too low, it is easy to wrinkle. If the temperature is too high, the softening is serious, and the forming accuracy is not high. The optimum forming temperature of TA15 titanium alloy is 670 ℃. Under the optimal process parameters, the thickness of sheet metal parts is relatively uniform, and the maximum deviation is only 0.1 mm. Thus, the hot stamping process can meet the thickness requirements of titanium alloy curved surface parts.

基金项目：

作者简介：胡云（1975-），女，硕士，副教授 E-mail：274054523@qq.com

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