Positioned welding jig and welding method for assembling thin-wall feedback rod of electro-hydraulic servo valve

Abstract

The invention belongs to the field of electro-hydraulic servo valve manufacturing and assembling, and particularly relates to a positioned welding jig and welding method for assembling a thin-wall feedback rod of an electro-hydraulic servo valve. The problems of welding precision and efficiency of the thin-wall feedback rod in the method are solved. The positioned welding jig comprises an upper positioning structure, an elastic clamping structure, an adjustable positioning structure and a supporting structure. The upper positioning structure is used for positioning a feedback rod seat; the elastic clamping structure is used for clamping a non-welded part of the feedback rod, the adjustable positioning structure is used for achieving steel ball positioning; and the supporting structure is used for ensuring the stability of the positioned welding jig in the welding process. According to the positioned welding jig, a plurality of adjustable mechanisms are adopted, the welding precision requirement of the thin-wall feedback rod of the electro-hydraulic servo valve to be welded and assembled is decomposed into two parts, namely a positioning error of the jig and a dimension error of a part to be welded and assembled to be separately controlled and guaranteed, and meanwhile, after one-time adjustment, continuous use can be achieved, thereby ensuring repetition precision and efficiency of welding.

Description

technical field [0001] The invention belongs to the field of electro-hydraulic servo valve manufacturing and assembly, and in particular relates to a positioning welding fixture and welding method for assembling a thin-walled feedback rod of an electro-hydraulic servo valve. Background technique [0002] The existing electro-hydraulic servo valve feedback rod is generally formed integrally by turning a steel column with a circular cross-section, and then it is bent and formed by sheet metal, or a finely ground ball is turned at the end and used with a precision groove. [0003] The existing method is difficult to process, time-consuming and labor-intensive to adjust, and non-design bending loads are easily introduced during the movement of the feedback lever, which affects product accuracy. Contents of the invention [0004] In order to solve the problems of welding accuracy and efficiency of the thin-walled feedback rod in the above method, the present invention provides ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of welding accuracy and efficiency of thin-walled feedback rods in the above method, the present invention provides a positioning welding fixture and welding method for assembling thin-walled feedback rods of electro-hydraulic servo valves

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