Hydroforming method for manufacturing multilayer metal sealing gasket

A metal sealing gasket and sealing gasket technology, applied in the field of metal plastic forming, can solve the problems of difficult rolling forming, poor versatility, and poor forming accuracy of parts, and achieve good dimensional consistency, wide application range, and processing good flexibility

Active Publication Date: 2019-12-20
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings of traditional multi-layer metal sealing gaskets, such as difficulty in roll forming, poor part forming accuracy, and poor versatility, the present invention aims to provide a hydroforming method for manufacturing multi-layer metal sealing gaskets, which can form different Special-shaped rings with cross-sectional shape, simple and convenient operation, and good product quality

Method used

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  • Hydroforming method for manufacturing multilayer metal sealing gasket
  • Hydroforming method for manufacturing multilayer metal sealing gasket
  • Hydroforming method for manufacturing multilayer metal sealing gasket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Double-layer GH4169 material E-shaped circular structure metal sealing gasket, the structure diagram is as follows image 3 shown.

[0099] The initial structural parameters are as follows: the outer diameter of the sealing ring D = 300mm, the free height of the sealing ring H = 13.16mm, the radius of curvature of the contact surface R = 4mm, the single-layer wall thickness t 1 = t 2 =0.3mm, number of layers n=2, trough radius R 1 =1.2mm, crest radius R 2 =1.5mm, wave height h=5mm, 3 corrugations.

[0100] 1) Prepare materials. Calculated inner diameter d of the first layer blank 1 is 284.22mm, the first layer of metal sealing gasket cross-sectional development length L 1 ' is 50.85mm, the tube length L 1 Take 2 times L 1 'Length, rounded to 102mm; inner diameter of the second layer blank d 2 282.82mm, the second layer of metal sealing gasket cross-sectional development length L 2 'is 49.81mm, and the length of the tube blank is L 2 Take 2 times L 2 'The len...

Embodiment 2

[0110] Double-layer GH4738 material C-shaped runway-shaped metal sealing gasket, the structure diagram is as follows Figure 6 shown.

[0111] The initial structural parameters are as follows: the outer diameter of the sealing ring D = 300mm, the radius of the C-shaped section R = 8mm, the included angle of the C-shaped opening θ = 80°, and the single-layer wall thickness t 1 = t 2 =0.3mm, number of layers n=2, 1 corrugation.

[0112] 1) Prepare materials. The outer diameter of the arc section of the outermost blank cross section D 0 =271.74mm, straight edge section M=200mm; after calculation, the inner diameter of the arc section of the first layer of billet d 1 271.14mm, the first layer of metal sealing gasket cross-sectional development length L 1 ' is 39.1mm, the tube length L 1 Take 2 times L 1 'Length, rounded to 78mm; the inner diameter of the arc section of the second layer blank d 2 is 270.34mm, the second layer of metal sealing gasket cross-sectional developm...

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Abstract

The invention discloses a hydroforming method for manufacturing a multilayer metal sealing gasket. The method comprises the following steps of (1) material preparing: manufacturing cylindrical blanks;(2) assembly: sequentially assembling the cylindrical blank of each layer of metal sealing gasket in a sleeve mode; (3) stress relief heat treatment; (4) hydraulic bulging: machining a hydraulic bulging mold consistent with the outline of the multilayer metal sealing gasket product to form a multilayer metal sealing gasket semi-finished workpiece; (5) trimming: removing the hydraulic bulging mold; (6) shape correction: machining a shape correcting mold consistent with the outline of the multilayer metal sealing gasket semi-finished workpiece; (7) aging treatment: carrying out aging strengthentreatment on the multilayer metal sealing gasket semi-finished workpiece; (8) polishing: polishing the sealing surface of the multilayer metal sealing gasket semi-finished workpiece; and (9) cleaningand packaging: carrying out surface cleaning on the multilayer metal sealing gasket semi-finished workpiece to obtain the multilayer metal sealing gasket product. The hydroforming method for manufacturing the multilayer metal sealing gasket has the characteristics of simple and convenient operation and good product quality.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming, in particular to a hydroforming method for manufacturing multilayer metal sealing gaskets. Background technique [0002] Multi-layer metal gaskets have the advantages of light weight, good elasticity, good sealing performance, and light structure. They are widely used in aviation, aerospace, missiles, petrochemical, nuclear energy and other fields, and are important sealing components. [0003] However, due to the complex cross-sectional characteristics, the diversity of sealing structures, and the limitation of the plasticity and elongation of the material itself, the plastic forming of metal sealing gaskets is very difficult, and it is prone to material cracking, instability and wrinkling, and poor forming stability. . Metal sealing gaskets are usually manufactured by the rolling process after the strip is rolled and welded. However, the positioning accuracy of the strip and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D26/033B21D26/047
CPCB21D26/033B21D26/047B23P15/00
Inventor 刘静吕志勇李兰云陈庆龙
Owner XI'AN PETROLEUM UNIVERSITY
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