To meet the requirements of stealth, long life and lightweight structure in modern aircraft design, titanium alloy products have been widely used. These structural parts, such as frames, beams, wall panels, etc., not only have large outline dimensions, but also have numerous and deep grooves, thin walls and often accompanied by variable bevel theoretical surfaces, which poses great challenges to CNC machining. During the machining process, the material removal rate is as high as 90%~95%, of which thin walls and deep grooves account for more than 80%, making this type of structural parts show typical weak rigidity characteristics and extremely unstable machining state. In addition, the characteristics of titanium alloy materials themselves, such as low elastic modulus, large elastic deformation, high cutting temperature, low thermal conductivity and chemical activity at high temperature, all aggravate the sticking phenomenon during the cutting process, which can easily cause excessive wear or even damage of the tool, thereby affecting the cutting performance of titanium alloy.
In the manufacturing process of titanium alloy aircraft integral frames, beams and large wall panels, due to the complex structure of the parts, strict requirements for shape coordination, and numerous assembly coordination surfaces and intersection holes, the manufacturing precision of the parts is extremely high. In addition to the challenges of large metal removal, low relative stiffness and poor processing technology, the influence of factors such as cutting force, cutting vibration and cutting heat is more significant, resulting in problems such as tool letting, deformation and vibration during processing, making it difficult to control the processing quality. In addition, as a typical difficult-to-process material, titanium alloy has extremely strict requirements on machine tools, cutting tools and processing technology. Therefore, the traditional processing method of titanium alloy aviation structural parts can often only be carried out at a low cutting amount level, which not only prolongs the production cycle, but also increases the processing cost, making the processing of titanium alloy aviation structural parts a complex manufacturing process problem in the aviation manufacturing industry.
In order to solve these problems, experts and scholars at home and abroad have conducted extensive research. In terms of tooling clamping technology, the clamping principle of titanium alloy parts has been proposed, aiming to adjust the clamping force according to different processing stages to ensure the stability and precision of parts during processing. At the same time, in order to increase the rigidity of the entire processing system, appropriate auxiliary devices should be added for thin-walled structural parts with poor rigidity.
Post time: Apr-18-2025