CN-121988977-A - Friction deposition forming manufacturing method for aluminum alloy aircraft hub

Abstract

The invention discloses a friction deposition forming manufacturing method for an aluminum alloy airplane hub, which comprises the following steps of establishing an airplane hub three-dimensional model, depositing an aluminum alloy metal bar on a substrate according to a preset deposition path by adopting the friction deposition forming method according to the airplane hub three-dimensional model to obtain an airplane hub forging stock, finish forging the airplane hub forging stock, air-cooling to room temperature to obtain the forging stock, and performing heat treatment on the forging stock to obtain the aluminum alloy airplane hub.

Inventors

• MENG LINGKUN
• CUI LEI
• LI XIAOGUANG
• YAO HAINING
• ZHONG HUA
• HE BIN
• JI XIN

Assignees

• 天津大学

Dates

Publication Date

20260508

Application Date

20241104

Claims (10)

1. 1. A friction deposition modeling manufacturing method for an aluminum alloy aircraft hub, which is characterized by comprising the following steps: S1, establishing an aircraft hub three-dimensional model, and depositing an aluminum alloy metal bar (2) on a substrate (4) according to a preset deposition path by adopting a friction deposition forming method according to the aircraft hub three-dimensional model to obtain an aircraft hub forging stock (5), wherein the friction deposition forming method rotates the aluminum alloy metal bar (2) and causes friction to be generated between the aluminum alloy metal bar (2) and the surface of the substrate (4), then the aluminum alloy metal bar is heated and plasticized, a layer of deposition layer (3) is formed by spreading, all the deposition layers (3) form the aircraft hub forging stock (5) or form the aircraft hub forging stock (5) with the substrate (4), the rotation speed of the aluminum alloy metal bar (2) is 200-450 r/min, the travelling speed of the aluminum alloy metal bar (2) on the substrate (4) is 100-500 mm/min, the feeding speed of the aluminum alloy metal bar (2) is 0.5-5 mm/S, and the height of each layer of deposition layer (3) is 0.5-4 mm; S2, carrying out finish forging on the airplane hub forging stock (5), and air-cooling to room temperature to obtain a forging stock, wherein the temperature of the finish forging is 350-450 ℃, and the pressing speed of an upper punch of a finish forging die used for the finish forging is not more than 5mm/S; And S3, carrying out heat treatment on the forging stock to obtain the aluminum alloy airplane wheel hub (6), wherein the heat treatment comprises solution treatment for 10-60 min at 500-540 ℃, water quenching after taking out, artificial aging treatment for 10-60 h at 160-180 ℃, and taking out for air cooling to room temperature.
2. 2. The friction deposit forming manufacturing method according to claim 1, characterized in that in S1, the preset deposit path is a multilayer multi-arc deposit path.
3. 3. The method according to claim 1, wherein in S1, the overlap amount between the two deposition layers (3) is 2 to 5mm.
4. 4. The friction deposit forming manufacturing method according to claim 1, characterized in that in S1, the shape of the aluminum alloy aircraft hub (6) is taken as a standard shape, and a structure in which the standard shape is simplified into a bevel, chamfer and bent structure is taken as the shape of an aircraft hub three-dimensional model.
5. 5. The method according to claim 1, wherein in S1, the aluminum alloy metal bar (2) is made of an aluminum high-strength alloy for aviation.
6. 6. The method according to claim 5, wherein in S1, the substrate (4) is made of a 6-series aluminum alloy or the same material as the aluminum alloy metal bar (2).
7. 7. The friction deposit forming manufacturing method according to claim 1, characterized in that in S1, the diameter of the aluminum alloy metal bar (2) is 10 to 15mm.
8. 8. The friction deposit forming manufacturing method according to claim 1, characterized in that in S1, the aluminum alloy metal bar (2) is conveyed by a shoulder (1), a feed passage for passing through the aluminum alloy metal bar (2) is formed in the shoulder (1), and the feed passage is eccentrically provided in the shoulder (1).
9. 9. The friction deposition modeling manufacturing method according to claim 8, wherein a distance between a center line (1-1) of the feed channel and a center line (1-2) of the shoulder is 0-10 mm.
10. 10. Use of the friction deposit forming manufacturing method according to any one of claims 1 to 9 for increasing the tensile strength/elongation of an aircraft hub.

Description

Friction deposition forming manufacturing method for aluminum alloy aircraft hub Technical Field The invention belongs to the technical field of aviation manufacturing, and particularly relates to a friction deposition forming manufacturing method for an aluminum alloy airplane hub. Background The aircraft hub is an important structural member for bearing the aircraft, and the manufacturing quality of the aircraft hub is directly related to the safety and reliability of the aircraft. Conventional forging techniques, although solving the material strain hardening problem to some extent. However, in actual production, the hub forging has defects of uneven structure, long production period, thick surface grains and the like, and has the defects of large machining allowance, low material utilization rate, poor dimensional accuracy and the like. For example, CN111604463a proposes a method for preparing a near-net shaped die forging of a hub of a civil aircraft, in which the material is required to undergo seven steps of ingot casting, sawing and blanking, flaw detection, blank molding, pre-forging, final forging and heat treatment, the procedures are numerous, the required equipment and process costs are high, parameters such as temperature and deformation speed are strictly controlled in the multiple forging processes, and the production period is long while the energy consumption is large. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a friction deposition forming manufacturing method for an aluminum alloy airplane hub, which aims to obtain uniform fine grain structure, improve the production efficiency, reduce the production cost and ensure the product quality. The aim of the invention is achieved by the following technical scheme. A friction deposition modeling manufacturing method for an aluminum alloy aircraft hub, comprising the steps of: S1, establishing an aircraft hub three-dimensional model, and depositing an aluminum alloy metal bar on a substrate according to a preset deposition path by adopting a friction deposition forming method according to the aircraft hub three-dimensional model to obtain an aircraft hub forging stock, wherein the friction deposition forming method rotates the aluminum alloy metal bar, rubs the aluminum alloy metal bar with the surface of the substrate, is heated and plasticized, and finally spreads to form a layer of deposition layer, all the deposition layers form the aircraft hub forging stock or form the aircraft hub forging stock with the substrate, the rotation speed of the aluminum alloy metal bar is 200-450 r/min, the travelling speed of the aluminum alloy metal bar on the substrate is 100-500 mm/min, the feeding speed of the aluminum alloy metal bar is 0.5-5 mm/S, and the height of each layer of deposition layer is 0.5-4 mm; in the step S1, the preset deposition path is a multilayer multi-arc deposition path. In the step S1, the overlapping amount of the two deposition layers is 2-5 mm. In the step S1, the shape of the aluminum alloy aircraft hub is taken as a standard shape, and a structure with a standard simplified inclined plane, chamfer and bending structure is taken as the shape of the three-dimensional model of the aircraft hub. In S1, the material of the aluminum alloy metal bar is an aviation high-strength aluminum alloy, for example, a 2-series aluminum alloy or a 7-series aluminum alloy. In the step S1, the substrate is made of a 6-series aluminum alloy or the same material as the aluminum alloy metal bar. In the step S1, the diameter of the aluminum alloy metal bar is 10-15 mm. In the step S1, the aluminum alloy metal bar is conveyed by a shaft shoulder, a feeding channel for passing through the aluminum alloy metal bar is formed in the shaft shoulder, and the feeding channel is eccentrically arranged in the shaft shoulder. In the step S1, the section of the aluminum alloy metal bar is round, square, triangular or special-shaped. In the technical scheme, the distance between the axis of the feeding channel and the axis of the shaft shoulder is 0-10 mm. S2, performing final forging on the airplane hub forging stock, and air-cooling to room temperature to obtain the forging stock, wherein the temperature of the final forging is 350-450 ℃, and the pressing speed of an upper male die of a final forging die used for the final forging is not more than 5mm/S; and S3, carrying out heat treatment on the forging stock to obtain the aluminum alloy airplane wheel hub, wherein the heat treatment comprises the steps of carrying out solution treatment for 10-60 min at 500-540 ℃, taking out, carrying out water quenching, carrying out artificial aging treatment for 10-60 h at 160-180 ℃, taking out, and carrying out air cooling to room temperature. Use of a friction deposit forming manufacturing process as described for increasing the tensile strength/elongation of an aircraft hub. Compared with the prior art, the invention ha