Titanium alloy mounting ring and molybdenum grid welding tool and electron beam welding technology

Abstract

The invention relates to a titanium alloy mounting ring and molybdenum grid welding tool and an electron beam welding technology. The welding tool comprises a base, an annular base plate, an upper pressing ring and a plurality of pressing sleeves. The annular base plate is fixed to the upper end face of the base. A plurality of pressing blocks used for clamping a molybdenum grid are distributed in the inner circumferential face of the upper pressing ring at intervals. The pressing sleeves which are the same as the pressing blocks in number and correspond to the pressing blocks in position are distributed in the portion, along the circumference of the upper pressing ring, of the base, and comprise brackets and pressing bolts. The brackets are fixedly arranged on the base, and the head ends of the pressing bolts can penetrate through screw holes in the brackets and tightly jack the pressing blocks correspondingly. According to the titanium alloy mounting ring and molybdenum grid welding tool and the electron beam welding technology, a titanium alloy mounting ring and the molybdenum grid are welded through the electron beam welding technique with concentrated energy density and small heat input, the connecting quality and size precision between the mounting ring and the molybdenum grid can be ensured, the bonding strength between the mounting ring and the molybdenum grid is improved, the service lives of the mounting ring and the molybdenum grid can be obviously prolonged, and the weight of a whole aviation component can be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of metal material welding, in particular to a welding tool for a titanium alloy mounting ring and a molybdenum grid and an electron beam welding process. Background technique [0002] The volume and weight of aeronautical structural parts have a crucial impact on the service life and carrying capacity of aircraft. The development of lightweight, high-precision, and high-strength structural parts has become an inevitable development trend of current aeronautical devices, and it is also a key issue that needs to be studied urgently. A key structural part of an aerospace vehicle is composed of molybdenum grid and titanium alloy fixed installation ring. Due to the limitation of its working principle, the dimensional accuracy requirements are very strict, and it needs to serve in a high temperature environment of 400 ° C. The molybdenum grid in this structure The connection between the electrode and the titanium ...

AI Technical Summary

Problems solved by technology

A key structural part of an aerospace vehicle is composed of molybdenum grid and titanium alloy fixed installation ring. Due to the limitation of its working principle, the dimensional accuracy requirements are very strict, and it needs to serve in a high temperature environment of 400 ° C. The molybdenum grid in this structure The connection between the electrode and the titanium alloy fixed installation ring directly affects the structural design. Because the wall of the structural part is very thin, in the past products, in order to ensure the dimensional accuracy, the connection method can only be fastened by bolts. On the one hand, the structure and weight have increased, on the other hand, when used at its working temperature, the dimensional accuracy of the structural parts is significantly reduced after several times of heating and cooling, which seriously reduces the working capacity and service life.

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