Combined type valve element cold press forming tool and forming process

Abstract

The invention provides a combined type valve element cold press forming tool and a forming process. The combined type valve element cold press forming tool comprises a base, a fastening sleeve, a guide column, a pressing rod and a spring; during forming, parts of the composite valve element are assembled; fastening pieces are fixed through closing openings or pins; the assembled combined type valve element is arranged in an inner cavity of the base, and the long-column-shaped guide rod of the valve element base body is inserted into a small hole of the base; the fastening sleeve is arranged outside the combined type valve element in a sleeving manner and is in threaded connection with the inner circle of the base; the small end of the pressing rod is inserted into the small hole of the fastening sleeve and is in contact with the upper surface of a plastic sealing ring of the valve core; the guide column is arranged in the inner cavity of the pressing rod, and then the spring is inserted into the inner cavity of the pressing rod to abut against the guide column; a plastic sealing ring of the composite valve element is subjected to pressure maintaining, so that plastic is fully pressed and fully deforms within a limited range; and the surface of the valve element is machined to ensure that the sealing surface is flat. The soft sealing structure of the composite valve element is effectively manufactured, and good sealing performance is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a composite valve core cold-press forming tool and a forming process. Background technique [0002] The composite spool is a soft-sealed spool composed of multiple parts. It has high sealing reliability in liquid rocket engines and a wide range of applications. Many automatics use this structure to ensure reliable functions of the automatics. The sealing material of the soft seal structure has a certain degree of elasticity. Compared with the hard seal structure, its sealing performance is better, which is more conducive to the quality assurance of aerospace products. However, during the forming process of the composite valve core, the non-metallic material undergoes plastic deformation and fills the 60° sealing groove on the substrate. The filling quality of the non-metallic material of the valve core will be affected by the forming process and auxiliar...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present inventor has carried out dedicated research and provided a liquid rocket engine compound valve core cold-press forming tooling and forming process, which solves the problem that the compound valve core plastic sealing ring passes through within a limited range. Plastic deformation, the technical problem of fully filling the sealing cavity and then realizing the tight fit with the metal, effectively realizes the soft sealing structure manufacturing of the composite valve core, and ensures good sealing performance, thus completing the present invention

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