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Forging method of elliptical shell forgings

An ellipsoid and shell technology, which is applied in forging/pressing/hammering machinery, manufacturing tools, forging/pressing/hammer devices, etc., can solve the problems of large machining allowance, high manufacturing cost, and large waste of materials. Achieve the effects of short processing cycle, low manufacturing cost, and small machining residue

Active Publication Date: 2016-02-24
GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the existing two methods are: when the excess metal is removed by machining, the machining allowance is large, the processing cycle is long, the material waste is large, and the manufacturing cost is high

Method used

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  • Forging method of elliptical shell forgings
  • Forging method of elliptical shell forgings
  • Forging method of elliptical shell forgings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figures 1 to 7 As shown, in view of the problems and disadvantages of the traditional method of manufacturing ellipsoidal shell parts, the present invention provides a forging method for ellipsoidal shell forgings, which mainly includes the following steps:

[0026] A. Fabrication of the forging device: first, according to the shape of the forging 7 of the ellipsoid shell, a preforming device and a forming device are manufactured and processed. The preforming device is composed of a goose head mandrel 1 and a preforming die 2, and the forming device is composed of a forming mandrel 3 , an upper molding die 4, and a lower molding die 5. The bulge-shaped raised portion 101 provided on the goose-head mandrel 1 and the pre-forming working surface 201 on the pre-forming die 2 constitute a pre-forming work area, and the pre-forming work The surface 201 is provided with an arched herringbone-shaped structure in the horizontal direction, and the preforming working surf...

Embodiment 2

[0034] Such as Figures 1 to 7 As shown, the pulsation buffer is a typical elliptical shell part with an inner cavity and irregular shape. The material grade is 022Cr23Ni5Mo3N ferrite + austenitic duplex stainless steel (equivalent to SA-182MF60 (UNS32205), the The chemical composition and mechanical properties of the materials are shown in Table 1 and Table 2:

[0035] Table 1 chemical composition

[0036]

[0037] Table 2 Mechanical performance indicators

[0038] performance room temperature Specified strength R p0.2 (MPa) ≥450 Tensile strength R m (MPa) ≥620 Elongation after break A(%) ≥25 Reduction of area Z(%) ≥45

[0039] This embodiment provides a forging method for such a pulsation buffer forging, which mainly includes the following steps:

[0040] A. Fabrication of the forging device: first, according to the shape of the forging 7 of the ellipsoid shell, a preforming device and a forming device are manufactured and proc...

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Abstract

The invention discloses a method for forging a forge piece with an ellipsoidal shell. The method comprises the following steps: firstly, heating a raw ingot, keeping the temperature, repetitively forging and pressing in a forging temperature internal so as to change the structural state, seaming internal defects, punching by using a punch head, and drawing out a core rod to obtain a cylindrical blank; sleeving a goose-head-shaped core rod with the cylindrical blank, and pressing and pre-forming by using a pre-forming mould; and sleeving a formed core rod with the pre-formed blank obtained by pre-forming the cylindrical blank, putting the pre-formed blank between an upper forming mould and a lower forming mould, downwardly pressing the upper forming mould, simultaneously, rotating the pre-formed blank along with rotation of the formed core rod, and ensuring that the circumferential surface of the pre-formed blank is completely pressed and finally formed, thus obtaining the forge piece with the ellipsoidal shell. The fibre direction of the forge piece with a conical surface obtained by using the method disclosed by the invention is distributed in a conformal manner; and the forge piece provided by the invention is steady and reliable in quality, material-saving, short in machining period and low in manufacture cost, and machining excess materials are few in quantity.

Description

technical field [0001] The invention belongs to the technical field of forging in mechanical manufacturing, and in particular relates to a method for forging an ellipsoid shell forging. Background technique [0002] The traditional manufacturing method of ellipsoidal shell forgings is generally formed by forging solid forgings, and then produced by drilling and turning the excess internal allowance. The products produced in this way are cut off due to the fiber direction inside the forging, which reduces its comprehensive mechanical properties. performance and service life; or direct molding by casting, but the internal structure and mechanical properties are not easy to control, and there is a problem of uneven distribution of material structure, which makes it difficult for the comprehensive mechanical properties to meet the use requirements of pressure vessels. [0003] The pulsation buffer is a typical elliptical shell part with an inner cavity and irregular shape, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/10B21J5/12B21J13/02
Inventor 杜力军
Owner GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS