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Closed die forging method of GH4169 stator blade

A GH4169, stator blade technology, applied in the field of forging, can solve the problems of high manufacturing cost of forging blades, not suitable for small batches, complex process, etc., to shorten the production cycle, ensure the performance of parts, and simplify the process.

Active Publication Date: 2016-12-07
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multiple sets of dies are used, including extrusion dies, final forging dies, and trimming dies. The manufacturing cost of forged blades is high, and the number of dies used results in high manufacturing costs. It is not suitable for small batches, short manufacturing cycles, and the process more complicated

Method used

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  • Closed die forging method of GH4169 stator blade
  • Closed die forging method of GH4169 stator blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Forging design: according to figure 1 , the direction of blade thickness: according to the outer normal direction of the blade pot and blade back of the stator blade parts, add a margin of 3mm to obtain the blade pot and blade back of the forging; blade chord width direction: according to the inlet and outlet of the stator blade parts After each edge is extended 3mm outward, draw a tangent line from the blade back direction to the blade pot direction on the obtained arc at an angle of 5°, and extend and intersect with the forging blade pot surface to obtain the cross-sectional shape of the stator blade forging; the blade length direction : According to the length of the stator blade part, both ends extend 4mm outward to obtain the blade forging;

[0039]2. Closed mold design: including upper mold and lower mold, closed mold cavity part: the upper mold cavity is designed according to the surface of the forging blade basin, and protrudes from the mold base level by 15m...

Embodiment 2

[0046] 1. The forging design is the same as above;

[0047] 2. Closed mold design: including upper mold and lower mold, closed mold cavity part: the upper mold cavity is designed according to the surface of the forging leaf basin, and protrudes 20mm from the base level of the mold; the lower mold cavity is designed according to the profile of the forging leaf back, And recess the lower mold reference plane by 20mm, and the convex height of the upper mold should be consistent with the concave height of the lower mold; the side wall of the upper mold convex and the lower mold concave should be designed according to 5°, and this angle is the draft slope; The bosses of the upper mold and the side walls of the grooves of the lower mold are fitted together, which can not only control the displacement of the forging, but also prevent the generation of burrs to form a closed mold; the cavity of the upper and lower molds is in the length direction, and the length of the forging is added...

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Abstract

The invention discloses a closed die forging method of a GH4169 stator blade. According to the aims, the technological process is simplified, cost is reduced, and meanwhile part performance is ensured. According to the adopted technical scheme, the blade basin molded surface and the blade back molded surface of a forged piece, the section shape of the forged piece and the length of the forged piece are designed according to a stator blade part; then a closed die is designed according to the shape of the forged piece; an upper die cavity is designed according to the blade basin molded surface of the forged piece, and a lower die cavity is designed according to the blade back molded surface of the forged piece; the convex height of an upper die body is the same as the concave height of a lower die body, and the side walls of the two side faces of an upper die boss and the side walls of the two side faces of a lower die groove are attached; the diameter and length of a GH4169 blank are calculated, and therefore the specification of the blank is proper; in combination with the burr-free design of the closed die, the problem that the die is damaged due to the too large specification, or the die cannot be filled with small forged pieces due to the too small specification is avoided; and the blank is subjected to heating and heat preservation and then is forged to obtain the forged piece, and after the forged piece is subjected to surface cleaning and heat treatment, the GH4169 stator blade is obtained.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a closed die forging method for a GH4169 stator vane. Background technique [0002] GH4169 material is widely used in the new generation of engines, especially blade parts, which need to be forged to ensure high metallurgical structure indicators. The grain size of the forging requires grade 7 or finer, and the forging δ (Ni3Nb) is correspondingly rod-shaped or granular. The production cycle of forgings is long, a large number of tooling needs to be dispatched, and the metallurgical performance indicators of forgings are unstable. In the existing forging method, the manufacturing process includes extrusion, final forging, trimming, and heat treatment. Multiple sets of dies are used, including extrusion dies, final forging dies, and trimming dies. The manufacturing cost of forged blades is high, and the number of dies used results in high manufacturing costs. It is n...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21K3/04
CPCB21J5/025B21K3/04
Inventor 吕小茹杨辉孙雪松徐昌尹喜刚姚文广王世泽阮楠
Owner AECC AVIATION POWER CO LTD
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