CN214557085U

CN214557085U - Blade forging die

Info

Publication number: CN214557085U
Application number: CN202120201748.3U
Authority: CN
Inventors: 陈英杰; 叶伟; 杨宏阳; 王雪艳; 吕圣浩
Original assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Current assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-11-02
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a blade forges mould, it forges in same preforging mould or finish forging mould to flatten the test bar and place with the blade blank. A test bar flattening platform is arranged on the flash bridge bin part of the blade forging die, and when blades are pre-forged and finish-forged, the test bars and the blades are formed (flattened) together. The utility model discloses guaranteed to flatten the size and the surface quality of test rod, reduced the damage to forging and pressing equipment, protected operating personnel's safety, simplified traditional test rod and flattened the process.

Description

Blade forging die

Technical Field

The utility model belongs to the pressure processing field, the last flattening test bar preparation structure of the die forging mould of concretely relates to blade, especially die forging mould.

Background

The blade of the high-pressure compressor of the aircraft engine is a critical part in the engine, a blade forging blank belongs to a class II forging, and each heat treatment furnace batch needs to be subjected to mechanical property detection; at present, the geometric shape of a high-pressure compressor blade of a turbofan engine is small, a performance sample cannot be directly taken from the blade, and only a flattening test bar is used for replacing the performance sample; according to the technical condition requirements of forgings of engines of different models and different blade materials, generally, each heat treatment furnace lot generally needs 8-20 flattening test bars, and 30-80 flattening test bars need to be flattened by blades of one forging lot according to 2000 pieces of calculation. The traditional test bar flattening is to find a relatively flat area on a die holder of forging equipment to flatten, and the flattening size of the test bar is adjusted by temporarily adding a cushion block and a gasket on a lower die holder. The conventional test bar flattening method has the following problems:

1. when the test bar is flattened by the die holder, the stress point of forging equipment is far away from the pressure center, the pressure applied to the test bar is unstable, the fluctuation of the flattened size is large, and the thickness size of two end heads of the same test bar possibly differs by more than 1 mm; the test bar is flattened in a certain area of the die holder for a long time to damage the surface of the die holder, and the surface of the flattened test bar is uneven.

2. Because the die holder need be with the help of adjustment size such as cushion, gasket, lack stability and safety protection when flattening the test bar, there is the potential safety hazard in the test bar flattening process.

3. The equipment works under the condition that a stress point is far away from a pressure center for a long time, so that the part stress of the forging equipment is uneven, the service life of the equipment is influenced, and meanwhile, the guide rail abrasion is aggravated and even the guide rail is deformed easily, so that the precision of the equipment is influenced.

Disclosure of Invention

The utility model aims at providing a blade forges mould replaces the method that adopts the die holder to flatten the test bar at present, guarantees to forge the size that flattens the test bar, simplifies the flattening operation process of test bar, guarantees to flatten the safety of test bar preparation process.

The pre-forging die and the finish forging die used for forging the blade blank at present are standard modules, most of compressor blades are small in geometric shape, a certain residual space is reserved outside a flash bridge bin part around a blade cavity of the machined forging die, and the residual space which can meet test bar flattening conditions is designed into a test bar flattening platform, so that the test bar flattening process can be completed by using the finish forging die (or the pre-forging die).

The size of the test bar flattening platform is set according to the relevant technical requirements for flattening the test bar. The test bar flattening platform is additionally designed on the die, so that the size of the test bar after being flattened can be effectively ensured, and the operation process of flattening the test bar is simplified; the test bar deforms in the die with the safety protection sleeve, and is safe and reliable.

The utility model adopts the technical scheme as follows:

the blade forging die comprises a blade cavity, wherein a flash bridge bin part is arranged around the blade cavity, and a test bar flattening platform is arranged on the flash bridge bin part.

Furthermore, the test bar flattening platform comprises a first flattening plane on the lower die and a second flattening plane on the upper die.

Furthermore, the first flattening plane and the second flattening plane are both concave planes, the normal direction of the planes is perpendicular to the joint surface, and the concave direction points to the direction far away from the joint surface.

Furthermore, the first flattening plane and the second flattening plane are parallel to each other and have consistent shapes and areas.

Further, the first flattening plane and the second flattening plane are located at one corner of the flash bridge bin portion and are rectangular planes.

Furthermore, the joint of the test bar flattening platform and the flash bridge bin part is rounded.

Furthermore, the test bar flattening platform is not communicated with the blade cavity.

Furthermore, the area of the test bar flattening platform is less than or equal to 20% of the area of the flash bridge bin part.

Further, the blade forging die is a finish forging die or a preforging die.

When the blade forging die is used for preparing the flattened test bar, the test bar and a blade blank are placed in the same pre-forging die or finish forging die for forging.

Preferably, the size of the test bar after being flattened is determined by the clearance between the first flattening plane of the upper die and the second flattening plane of the lower die in the pre-forging die or the finish forging die when the upper die and the lower die are closed.

Compared with the prior art, the utility model discloses possess following characteristics:

1. a test bar flattening platform is added on a finish forging die (or a preforging die), the stress point of the equipment is close to a pressure center when the test bar is flattened, the pressure applied on the test bar is relatively stable, the flattening size fluctuation is small, the surface quality of the test bar can be ensured, and the damage to the forging equipment is reduced at the same time

2. The test bar is formed in the die with the safety protection sleeve, so that the potential safety hazard to operators is reduced.

3. The operation is convenient, and the operation process of flattening the test bar is simplified.

Drawings

FIG. 1 is a schematic view of a test bar flattening platform at the flash bridge bin portions of a lower die and a middle die of a blade forging die;

FIG. 2 is a schematic cross-sectional view taken along line D-D of FIG. 1;

fig. 3 is a schematic view of the blade forging die in a state where the upper die and the lower die are clamped.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 3, a flash bridge bin portion is designed around a blade cavity 2 of a finish forging die, in this embodiment, a test bar flattening platform 1 is arranged at a corner of the flash bridge bin portion (the lower right corner in fig. 1), the test bar flattening platform 1 is composed of a first flattening plane on a lower die and a second flattening plane on an upper die, the first flattening plane and the second flattening plane are both concave rectangular planes, the concave direction points to the direction away from a die joint surface when the upper die and the lower die are closed, the area of the test bar flattening platform is equal to 17% of the area of the flash bridge bin portion, and when the dies are closed, the gap between the first flattening plane and the second flattening plane is equal to the final size of the test bar flattening.

In the design of the final forging die of the blade blank, a test bar flattening platform 1 can be added as long as the forging die has design conditions, the part of the die is put into production, the size of a flattened test bar is ensured through production verification, and the operation process of flattening the bar is simplified.

The above is one of the embodiments of the present invention, and various changes can be made by those skilled in the art on the basis of the above embodiments, and the object of the present invention can be achieved, but such changes should obviously be within the scope of the claims of the present invention.

Claims

1. Blade forges mould, including blade die cavity (2), be provided with overlap bridge storehouse portion, its characterized in that around the blade die cavity: the flash bridge bin part is provided with a test bar flattening platform (1).

2. The blade forging die of claim 1, wherein: the test bar flattening platform (1) comprises a first flattening plane on the lower die and a second flattening plane on the upper die.

3. The blade forging die of claim 2, wherein: the first flattening plane and the second flattening plane are both sunken planes, the normal direction of each plane is perpendicular to the joint surface, and the sunken direction points to the direction far away from the joint surface.

4. The blade forging die of claim 2, wherein: the first flattening plane and the second flattening plane are parallel to each other and have consistent shapes and areas.

5. The blade forging die of claim 2, wherein: the first flattening plane and the second flattening plane are located at one corner of the flash bridge bin part and are rectangular planes.

6. The blade forging die of claim 1, wherein: the test bar flattening platform (1) and the joint of the flash bridge bin part are rounded.

7. The blade forging die of claim 1, wherein: the test bar flattening platform (1) is not communicated with the blade cavity (2).

8. The blade forging die of claim 7, wherein: the area of the test bar flattening platform (1) is less than or equal to 20% of the area of the flash bridge bin part.

9. The blade forging die of claim 1, wherein: the blade forging die is a finish forging die or a preforging die.