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航空钛合金紧固件具有较高的精度要求,需完备的技术基础以支撑,因而其制造难度高于民用合金钢紧固件,其中大长径比钛合金螺栓更为明显。对于大长径比钛合金螺栓,在制造过程中存在严重的加工变形,需要解决热镦锻成形、热处理变形控制、整体型面加工及尺寸协调、高频疲劳测试等方面的难题。本文通过有效的热镦锻设备加工能力开发解决镦锻成形问题,热处理工装开发研究、科学的加工余量设计等途径解决了大长径比钛合金螺栓加工变形难题,通过优化的测试方法实现了大长径比钛合金螺栓有效性能测试。
Aerospace titanium fasteners with high accuracy requirements, the need to have a complete technical basis to support, and thus its manufacturing difficulty is higher than the civilian alloy steel fasteners, including large diameter titanium bolt is more obvious. For large aspect ratio titanium alloy bolts, there is a serious process distortion in the manufacturing process, which needs to solve the problems of hot upset forging, heat treatment deformation control, overall surface processing and size coordination, high-frequency fatigue testing and the like. In this paper, through the effective hot upsetting equipment processing capacity development to solve the problem of upsetting forming, heat treatment tooling research and scientific allowance design to solve the large aspect ratio titanium alloy bolt deformation problems, through the optimization of test methods to achieve Large aspect ratio titanium alloy bolt performance test.