锻压技术

基于材料力学的钛合金薄壁筒体零件热定型工艺

英文标题：Study of heat setting process for titanium alloy thin-walled cylindrical

作者：刘兴红李明涂泉

分类号：

出版年,卷(期):页码：2015,40(1):39-42

摘要：

钛合金作为一种特殊工业用材，已广泛应用于飞机发动机，但由于其特殊的材料性能，常温下薄壁筒形钛合金零件采用卷圆焊接等常规工艺难以保证其圆度及直径。由于材料不同，线膨胀系数和弹性模量不同，受热后变形程度以及内部应力的变化也就有差异，因此利用这种差异性，采用热定型工艺对零件进行校形。根据钛合金材料特性选择了合适的热定型温度及模具材料，并基于材料力学对加热过程进行详细分析计算，得出零件及模具设计所需初始数据，根据数据编排出合理的热定型工艺。通过现场多个不同尺寸零件试制加工验证，钛合金零件公差基本能控制在±0.1 mm，说明了该工艺分析方法的可行性。

As a kind of special industrial materials, titanium alloy has been widely used in aircraft engine. But its difficult to guarantee its roundness and diameter with traditional technology such as roll round welding processing, due to its special material properties of titanium alloy parts thin-walled cylindrical at room temperature. For the expansion coefficient and elastic modulus，heated deformation degree and change of inner stress of different materials are different, so the heat setting process was adopted to adjust the parts in virtue of the difference. Based on the properties of titanium alloy material，the appropriate heat setting temperature and mold materials were chosen, the heating process was analyzed and calculated in detail according to mechanics of materials, and the needed initial data of parts and mold design were obtained, and finally the reasonable heat setting process was got. Through manufacture process of a number of different size parts，the tolerance of titanium alloy parts can be controlled within ±0.1 mm，which verifies the feasibility of the heat setting process.

基金项目：

刘兴红(1976-)，男，工程硕士，高级工程师

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