Manufacturing process for metal felt sealing member and dedicated press forming die

Abstract

The invention relates to a manufacturing process for a metal felt sealing member, which comprises the following steps: metal wires are closely wound to form spiral spring rolls, the spiral spring rolls are stretched to form spiral springs with equal pitch, the spiral springs are cross-woven to form a metal felt sealing member blank, and the metal felt sealing member blank is molded by press forming process in a dedicated forming die. The invention also relates to a dedicated press forming die for manufacturing the metal felt sealing member, which comprises a lower die right base, a lower die left base, a lower die left / right base splint, a spacer plate, an upper die cutter blade, an upper die left base, an upper die right base, short bolts, a short cylindrical pin, a long bolt and a long cylindrical pin, wherein the lower die right base and the lower die left base are fixedly connected through the short cylindrical pin, the long bolt and the long cylindrical pin; the lower die left / right base splint, the spacer plate and the upper die cutter blade are sandwiched between the lower die right base and the lower die left base; and the upper die left base and the upper die right base are connected through the short bolts. The invention has the advantages that: the metal felt sealing member product is resistant to high temperature and corrosion and has a high strength and a good sealing property; and the manufacturing process is simple and the operation is convenient.

Description

technical field [0001] The invention relates to the field of metal materials and mechanical structures, in particular to a manufacturing process of a metal felt seal and a special pressing mold. Background technique [0002] When the guide vane is working, because the gas temperature is as high as about 800 degrees Celsius, the rubber material that generally plays the role of damping and sealing is difficult to meet the requirements of use. Seals with good sealing performance, high temperature resistance, corrosion resistance and high strength are required. [0003] Difficulties in processing metal felt seals that replace rubber materials in a high-temperature environment of 800 degrees Celsius, manufacturing rules of special forming molds, and key technical problems encountered in the use of molds: [0004] 1. For the mold with welded structure, because the punch and the bottom plate of the male mold are of a separate welded structure, there is a phenomenon of open welding...

AI Technical Summary

Problems solved by technology

[0004] 1. For the mold with welded structure, because the punch and the bottom plate of the male mold are of a separate welded structure, there is a phenomenon of open welding during pressing;

[0005] 2. When pressing elongated metal felt seals, due to the thin wall of the female mold, a "drum-shaped" phenomenon occurs during pressing, and the size of the middle part of the part becomes wider after the pressure is released; due to insufficient mold strength, the male mold and the female mold There are gaps between them, and the phenomenon of "clamping wire" appears, and the parts produce burrs after the pressure is released.

Images