Method for machining titanium alloy hollow light-weight airfoil

Abstract

The invention discloses a method for machining a titanium alloy hollow light-weight airfoil and relates to the technical field of welding. The method for machining the titanium alloy hollow light-weight airfoil aims at achieving the effects that the wall thickness of each core lattice of the hollow light-weight airfoil is small, the height of each core lattice of the hollow light-weight airfoil islarge, production efficiency of products can be improved, and manufacturing cost can be lowered. The method for machining the titanium alloy hollow light-weight airfoil comprises the steps of 1, conducting airfoil structure design, wherein the airfoil comprises skin, the internal core lattices and a frame, the internal core lattices comprise rib plates and connecting ribs, the rib plates are in cross connection, and each connecting rib connects the two corresponding crossing rib plates; 2, conducting material preparation, and conducting cutting and cleaning treatment on the skin, the rib plates, the connecting ribs and the frame; 3, conducting laser welding, wherein firstly, laser welding is conducted on the frame and the internal core lattices, so that a framework is formed, and secondly, laser welding is conducted on the skin and the frame; and 4, conducting thermal shaping, wherein after welding is completed, a workpiece is put into a shaping tool.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a processing method for a titanium alloy hollow lightweight airfoil. Background technique [0002] With the continuous improvement of the flight speed of aerospace vehicles and the urgent need for the overall structure of the weapon system to be lightweight, the wings, rudder wings, empennage and other products are gradually replaced by high-performance titanium alloys from the original aluminum alloys, and the forming methods of the airfoils are also changing. From the original riveting, bonding, argon arc welding to superplastic forming / diffusion connection, brazing, electron beam welding, etc. As a modern manufacturing method, superplastic forming diffusion connection technology is very suitable for the forming of titanium alloy lightweight structures, but for some parts with relatively thin skeleton wall thickness and very large airfoil thickness, due to the limitation of su...

AI Technical Summary

Problems solved by technology

As a modern manufacturing method, superplastic forming diffusion connection technology is very suitable for the forming of titanium alloy lightweight structures, but for some parts with relatively thin skeleton wall thickness and very large airfoil thickness, due to the limitation of superplastic properties of materials, There are certain limitations, and the process is difficult to achieve

For the brazing process, there are problems such as small brazing surface and many weld seams, but the rigidity of the welded parts is poor, and the tooling is difficult to load.

However, electron beam welding needs to be carried out in a vacuum environment. For parts that need to be welded with multiple welds, the production cycle is very long and the cost is very high.

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