Glass tube necking inward-turning flange and manufacturing method and equipment thereof

Abstract

The invention discloses a glass tube necking inward-turning flange and a manufacturing method and equipment thereof. The manufacturing method comprises the steps of firstly, heating and softening the middle part of a glass tube which is twice as long as the glass tube flange, gradually forming a reducing opening through a forming mold, forming two inward-turning flat flanges, and simultaneously cutting and separating the two inward-turning flat flanges into two glass tube flanges. The manufacturing equipment comprises a forming mold, a roller and a heating fire head. The glass tube necking inward-turning flange has the advantages that the diameter of a corresponding kovar end cover is reduced through the glass tube with the necking inward-turning flange, and kovar materials are saved; two workpieces can be machined at a time through the manufacturing method, and the production efficiency is improved; and the manufacturing equipment is simple in structure and easy to implement.

Description

technical field [0001] The invention relates to a glass tube necking and inversion flange, a manufacturing method and manufacturing equipment thereof, which are used for manufacturing outer cover glass tubes of metal glass vacuum heat collecting tubes. Background technique [0002] The existing metal glass vacuum heat collecting tube is composed of a metal heat absorbing body and an outer cover glass tube. figure 1 , a flat flange 102 must be made at the glass tube 101 end. The glass flange 102 can be a glass tube turned upside down. The specific manufacturing process is to clamp one end of the glass tube 101 on a glass lathe, heat the other end with a flame, and insert a U-shaped die into the tube at the same time. Compression molding, because the U-shaped die must move down to exit from the inner hole of the flange when it exits the tube after forming, so the diameter of the inner hole of the glass flange cannot be too small, that is, the glass flange cannot be small, and...

AI Technical Summary

Problems solved by technology

The glass flange 102 can be a glass tube turned upside down. The specific manufacturing process is to clamp one end of the glass tube 101 on a glass lathe, heat the other end with a flame, and insert a U-shaped die into the tube at the same time. Compression molding, because the U-shaped die must move down to exit from the inner hole of the flange when it exits the tube after forming, so the diameter of the inner hole of the glass flange cannot be too small, that is, the glass flange cannot be small, and only the glass tube with the same diameter can be made Inverted flanges, the corresponding kovar end caps are larger, and the outer diameter of the glass tube is the same. In addition, the process is low in efficiency in single-piece production, so it is necessary to invent small flanges, which can be produced efficiently

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