CN218926114U

CN218926114U - Prefabricated blank capable of avoiding cross flow of low-power tissue of bracket forging for airplane

Info

Publication number: CN218926114U
Application number: CN202222645627.5U
Authority: CN
Inventors: 王世鹏; 段辉; 陈军; 霍立刚
Original assignee: HANZHONG QUNFENG MACHINERY MANUFACTURE CO LTD
Current assignee: HANZHONG QUNFENG MACHINERY MANUFACTURE CO LTD
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-04-28
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a prefabricated blank for avoiding cross flow of a low-power structure of a bracket forging for an airplane, and relates to the field of aviation parts, wherein the prefabricated blank comprises a head part, a rib, a web part, a foot part, a first transition region of the head part, the rib and the web part, and a second transition region of the rib, the web part and the foot part; the first transition zone comprises a transition bevel angle alpha and a transition fillet R1, wherein the transition fillet R1 is positioned at the intersection of the head portion, the rib and the web portion; the second transition zone includes a transition bevel angle beta and a transition fillet R2, the transition fillet R2 being located at the intersection of the rib and web portion and the foot portion. Through reasonable prefabricated blank to solve this kind of die forging macrostructure nest flow, cross flow or folding problem, make the metal flow can evenly distributed in the mould type groove, satisfy die forging blank streamline organization simultaneously.

Description

Prefabricated blank capable of avoiding cross flow of low-power tissue of bracket forging for airplane

Technical Field

The utility model relates to the field of aviation parts.

Background

The bracket parts for the aircraft are widely applied to the aircraft, and the structural form of the bracket parts is changed according to the bracket, but has a plurality of common characteristics: the structural form of the part is complex, the wall thickness is thin, the part is easy to deform during processing, meanwhile, the processing precision requirement among the surfaces is not very high, but the coordination requirement is particularly high, so the part is seemingly simple, but the processing difficulty is generally high, and the working procedures are more. The common material is 7050-T7451 type aluminum alloy plate, in the traditional processing process, blanking is usually carried out firstly according to the blank size in the material ration, the whole plate is cut into small blanks, and in order to prevent deformation in the processing, rough processing is usually carried out firstly to leave corresponding allowance, and then finish processing is carried out.

The metal streamline means a structure in which impurities, compounds, segregation, low-melting point components, and the like of metal are distributed in a fibrous form along the main elongation deformation direction on a low-power test piece, and is also called a metal fiber structure or a forging streamline. The good and bad structure streamline of the die forging depends on the forging die design, the hammering energy size, the blank size, the appearance structure and other factors of the blank. Referring to fig. 1, for example, a blank of a "bracket" die forging for an aircraft is triangular, and because a rib plate in a partial area of the die forging is of a fully-closed structure, a large amount of redundant metal flows along a web plate and a foot part of a rib to a burr groove in a minimum resistance direction during forging, and the rib and the web plate foot part have a metal backflow phenomenon, so that the die forging has defects of nest flow, flow through, folding and the like in a low-power structure, and the low-power structure of the die forging is not in compliance with requirements and is scrapped.

Disclosure of Invention

The utility model aims at: in order to solve the technical problems, the utility model provides a prefabricated blank for preventing the low-power structure of a bracket forging for an airplane from flowing through.

The utility model adopts the following technical scheme for realizing the purposes:

the prefabricated blank comprises a head part, a rib, a web plate part, a foot part, a first transition area of the head part, the rib and the web plate part, and a second transition area of the rib, the web plate part and the foot part; the first transition zone comprises a transition bevel angle alpha and a transition fillet R1, the transition fillet R1 is positioned at the junction of the head part, the rib and the web part, and the transition bevel angle alpha extends from the transition fillet R1 to one side of the head part; the second transition zone comprises a transition bevel angle beta and a transition fillet R2, the transition fillet R2 is positioned at the intersection of the rib and the web portion and the foot portion, and the transition bevel angle beta extends from the transition fillet R2 to one side of the foot portion.

According to the scheme, the first transition area is arranged on the head part, the rib and the web part, and the second transition area is arranged on the rib, the web part and the foot part, blanks are optimized to form the transition oblique angle alpha, the transition round angle R1, the transition oblique angle beta and the transition round angle R2, so that in the subsequent forging process, metal flow can be uniformly distributed in a die groove during die forging, a large amount of redundant metal is caused to flow along the web and the minimum resistance direction from the foot part of a rib to a burr groove during forging, metal backflow phenomenon of the head part, the rib, the web part and the foot part is avoided through the transition oblique angle alpha, the transition round angle beta and the transition round angle R2, the defects of nest flow, flow through, folding and the like of a die forging piece macrostructure are avoided, the macroscopical structure and the streamline structure of the forging piece are uniformly distributed, the defective rate of the forging piece is greatly reduced, raw materials are saved, the production efficiency is improved, and the product quality is improved.

Further, the transition bevel angle alpha is 10-15 degrees, and the transition fillet R1 is 50-60 degrees.

Through the scheme, the large transition fillet R1 is matched with the small transition bevel angle alpha, so that a large amount of redundant metal is promoted to flow to the burr groove along the head part of the rib in the web plate and the minimum resistance direction during forging forming, and uniform metal streamline is formed.

Further, the transition bevel angle beta is 20-30 degrees, and the transition fillet R2 is 100-120 degrees.

Through the scheme, the large transition fillet R2 is matched with the small transition bevel angle beta, so that a large amount of redundant metal is promoted to flow to the burr groove along the web plate and the foot part of the bar in the minimum resistance direction during forging forming, and uniform metal streamline is formed.

Further, the first transition zone is forged from the junction of the head portion with the rib and web portion.

Further, the second transition zone is forged from the connection of the rib and web portion with the foot portion.

The beneficial effects of the utility model are as follows:

1. the die forging die is simple in structure, the first transition areas are arranged on the head part, the ribs and the web plate parts, and the second transition areas are arranged on the ribs, the web plate parts and the foot parts, blanks are optimized to form the transition oblique angles alpha, the transition round angles R1, the transition oblique angles beta and the transition round angles R2, so that in the subsequent forging process, metal flows can be uniformly distributed in a die groove during die forging, a large amount of redundant metal is promoted to flow along the web plate and the foot parts of the ribs in the minimum resistance direction to the burr groove during forging, and the preformed transition oblique angles alpha, the transition round angles R1, the transition oblique angles beta and the transition round angles R2 prevent the ribs and the web plate parts from generating metal backflow phenomenon on the head part, the ribs, the web plate parts and the foot parts, so that the defects of nest flow, through flow, folding and the like are avoided, the uniform distribution of the low-power structure and streamline structure of the forging is met, the defective rate of the forging is greatly reduced, raw materials are saved, the production efficiency is improved, and the product quality is improved;

2. the large transition fillet R1 is matched with the small transition bevel angle alpha, and the large transition fillet R2 is matched with the small transition bevel angle beta, so that a large amount of redundant metal is promoted to flow to the burr groove along the web plate and the head and the foot of the rib in the minimum resistance direction during forging forming, and uniform metal streamline is formed.

Drawings

FIG. 1 is a schematic diagram of a prior art blank;

FIG. 2 is a schematic diagram of the structure of the present utility model;

reference numerals: 1. a head; 2. rib and web portions; 3. a foot; r1 is a transition fillet; r2-transition fillets; a transition slope alpha; a transition slope beta.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 2, this embodiment provides a prefabricated blank for avoiding the occurrence of flow through of a low-power structure of an aircraft bracket forging, where the prefabricated blank includes a head portion 1, a rib and a web portion 2, a foot portion 3, a first transition region between the head portion 1 and the rib and the web portion 2, and a second transition region between the rib and the web portion 2 and the foot portion 3; the first transition zone comprises a transition bevel angle alpha and a transition fillet R1, the transition fillet R1 is positioned at the junction of the head part 1 and the rib and web part 2, and the transition bevel angle alpha extends from the transition fillet R1 to one side of the head part 1; the second transition zone comprises a transition bevel angle beta and a transition fillet R2, the transition fillet R2 is positioned at the junction of the rib and web part 2 and the foot part 3, and the transition bevel angle beta extends from the transition fillet R2 to one side of the foot part 3.

The first transition area is arranged on the head 1 and the ribs and the web 2, and the second transition area is arranged on the ribs and the web 2 and the foot 3, so that blanks are optimized, the defects of nest flow, flow through, folding and the like of low-power tissues of a die forging are avoided, the uniform distribution of low-power tissues and flow lines of the die forging is met, the defective rate of the die forging is greatly reduced, raw materials are saved, the production efficiency is improved, and the product quality is improved.

The specific manufacturing steps are as follows:

1. head part

The preform was forged into a rectangular parallelepiped of 50mmm (H1). Times.110 mm. Times.30 mm (H6).

2. Rib and web portion

Forging the prefabricated blank into a prismatic table with an isosceles trapezoid shape: 50mm (H1). Times.180 mm (H5). Times.345 mm (H4-H2-H3). Times.20 mm (H7).

3. Foot portion

The preform was forged into a rectangular parallelepiped of 25mm (H3). Times.180 mmm (H5). Times.65 mm (H8).

4. Transition region

The first transition area is forged at the joint of the head part, the rib and the web part, and the first transition area at the joint of the head part, the rib and the web part is forged at a transition bevel angle alpha=10-15 degrees; transition fillet r1=50° to 60 °;

the second transition area is forged at the joint of the rib and the web plate and the foot part, and the transition bevel angle beta=20-30 degrees is forged at the second transition area of the foot part, the rib and the web plate; transition rounded corners r2=100° -120 °;

the large transition fillet R1 is matched with the small transition bevel angle alpha, and the large transition fillet R2 is matched with the small transition bevel angle beta, so that a large amount of redundant metal is promoted to flow to the burr groove along the web plate and the head and the foot of the rib in the minimum resistance direction during forging forming, and uniform metal streamline is formed.

Claims

1. The prefabricated blank is characterized by comprising a head part, a rib, a web plate part, a foot part, a first transition area of the head part, the rib and the web plate part, and a second transition area of the rib, the web plate part and the foot part; the first transition zone comprises a transition bevel angle alpha and a transition fillet R1, the transition fillet R1 is positioned at the junction of the head part, the rib and the web part, and the transition bevel angle alpha extends from the transition fillet R1 to one side of the head part; the second transition zone comprises a transition bevel angle beta and a transition fillet R2, the transition fillet R2 is positioned at the intersection of the rib and the web portion and the foot portion, and the transition bevel angle beta extends from the transition fillet R2 to one side of the foot portion.

2. A prefabricated blank for avoiding the occurrence of cross-flow in the low-power structure of a bracket forging for an airplane according to claim 1, wherein the transition bevel angle alpha is 10-15 degrees, and the transition fillet R1 is 50-60 degrees.

3. A prefabricated blank for avoiding the occurrence of cross-flow in the low-power structure of a bracket forging for an aircraft according to claim 1, wherein the transition bevel angle beta is 20-30 degrees, and the transition fillet R2 is 100-120 degrees.

4. A prefabricated blank for avoiding cross-flow in an aircraft carrier forging macrostructure according to claim 1, wherein said first transition zone is forged from the junction of said head portion with said ribs and webs.

5. A prefabricated blank for avoiding cross-flow in an aircraft carrier forging macrostructure according to claim 1, wherein said second transition zone is forged from the junction of said rib and web portions with said foot portion.