Laser welding device and method for thin-wall corrugated diaphragm for aerospace diaphragm capsule

Abstract

The invention relates to the technical field of welding, in particular to a laser welding device and method for a thin-wall corrugated diaphragm for an aerospace diaphragm capsule. The device mainly comprises a thin-wall corrugated diaphragm inner ring welding tool, a thin-wall corrugated diaphragm outer ring welding tool and a coaxial gas protection tool. According to the device, precise positioning and assembling of a diaphragm before welding are achieved mainly through the inner ring welding tool for positioning the outer circle of the diaphragm and the outer ring welding tool for positioning the inner circle of the diaphragm, and the requirement for the overall coaxiality after the diaphragm capsule is subjected to series welding is met; by adding a red copper heat dissipation clamping piece, the heat dissipation condition of the diaphragm is improved, good heat conduction of the diaphragm in the welding process is achieved, and the forming defects such as weld beading, weld joint sinking and wave weld joints are avoided; and the coaxial gas protection tool is used in cooperation, so that oxidation of a circumferential weld of the diaphragm is avoided.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a laser welding device and method for a thin-walled corrugated diaphragm used in an aerospace capsule. Background technique [0002] Aerospace bellows type elastic sensor is generally composed of five parts: small bellows string, big bellows string, upper end cover, mounting base, and center rod assembly. It is widely used in aerospace and military fields, such as arrows used in rocket engines and rocket test systems. Body valves, bellows elastic valves for aero-engines, etc. [0003] combine figure 1 , as the core component of aerospace bellows elastic components, the structure and functional integrity of bellows strings are directly related to the performance of the entire bellows elastic components. Capsule strings are generally welded in series by multiple thin-walled corrugated diaphragms (thickness generally ≤0.2mm). Therefore, the welding technology of such corrugated d...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a laser welding device and method suitable for thin-walled corrugated diaphragms used in aerospace, which can effectively improve the unilateral, weld bumps, weld depressions and wave welds that are prone to occur during the current ultra-thin film welding. and other issues, improve the welding qualification rate of the diaphragm

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