A thin-walled special-shaped aviation oxygen bracket and a preparation method thereof

Abstract

The present invention discloses a thin-walled special-shaped aviation oxygen bracket and a preparation method thereof. The oxygen bracket comprises a first plate portion, a second plate portion, a connecting plate portion and a third plate portion. One end of the second plate portion is connected to the first plate portion, and the other end is connected to the third plate portion via the connecting plate portion. A convex column is provided at the bottom end of the first plate portion, and a first convex plate is symmetrically provided near the convex column at the bottom of the first plate portion. A plurality of arched through holes are provided at the bottom of the first plate portion, a plurality of first round through holes are provided at the bottom of the second plate portion, and a plurality of strip holes are provided at the top. A notch is provided at the third plate portion above the strip holes, and a plurality of second round through holes are provided at the portion of the third plate portion located above the bottom surface of the notch. The thin-walled special-shaped aviation oxygen bracket provided by the present invention has a reasonable structural design, is conducive to extrusion molding, reduces the overall production and manufacturing cost, and its mechanical properties can meet the use requirements of the oxygen bracket.

Description

Technical Field

[0001] The invention relates to the technical field of aviation accessories, and in particular to a thin-walled special-shaped aviation oxygen bracket and a preparation method thereof. Background Art

[0002] Aircraft oxygen supply system refers to personal protective equipment that ensures that aircraft crew members can inhale enough oxygen to prevent hypoxia during high-altitude flight or emergency situations. There are many forms depending on the number of passengers, range, ceiling (cruising altitude) and nature of the mission, but basically they are composed of oxygen source, control valve, regulator, indicating instrument, oxygen supply device, disconnector and oxygen mask. The oxygen source is mainly gaseous oxygen, followed by liquid oxygen. Some large passenger aircraft also use solid oxygen source. The oxygen regulator adjusts the oxygen supply pressure, flow rate and oxygen content according to certain rules as the flight altitude changes to meet the physiological needs of human breathing and body surface pressurization. Emergency oxygen supply system is often available on civil aircraft. During normal flight, cabin pressurization is used to prevent passengers from hypoxia. Once the cabin pressurization system fails, the emergency oxygen supply system will ensure oxygen supply for all passengers and passengers in a short time while the aircraft descends.

[0003] Oxygen brackets are parts of the oxygen supply system of aircraft. They are ultra-thin wall special-shaped extruded parts. Oxygen brackets are made of high-strength 7075-T73511 aluminum alloy. The existing oxygen brackets have shortcomings. First, the structural design is not reasonable, so that its mechanical properties cannot meet the use requirements; second, the parts are easy to deform and cannot meet the ultra-high straightness requirements of the parts. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art and to provide a thin-walled special-shaped aviation oxygen bracket and a preparation method thereof.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A thin-walled special-shaped aviation oxygen bracket, the oxygen bracket comprises a first plate portion, a second plate portion, a connecting plate portion and a third plate portion, one end of the second plate portion is connected to the first plate portion, and the other end is connected to the third plate portion via the connecting plate portion, the thickness of the first plate portion is greater than the thickness of the second plate portion, the thickness of the second plate portion is equal to the thickness of the third plate portion, a convex column is provided at the bottom end of the first plate portion, a first convex plate is symmetrically provided near the convex column at the bottom of the first plate portion, a plurality of arched through holes are uniformly provided at the bottom of the first plate portion along its length direction, a plurality of first round through holes are uniformly provided at the bottom of the second plate portion along its length direction, a plurality of strip holes are uniformly provided at the top of the first plate portion along its length direction, an angle between the third plate portion and the second plate portion is 160-170°, a notch is provided at the third plate portion above the strip hole, and a plurality of second round through holes are provided at a portion of the third plate portion located above the bottom surface of the notch along its length direction.

[0007] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the thickness of the first plate portion is 2.3-2.5 mm, the outer diameter of the protruding column is 3.7-3.9 mm, and the thickness of the first protruding plate is 1.7-1.9 mm.

[0008] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the thickness of the second plate portion and the third plate portion is 1.8-2.0 mm.

[0009] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the arched through hole separates the first convex plates on both sides into multiple plate sections, the upper part of the arched through hole is a semicircular groove, and the lower part is a rectangular groove, and the width of the rectangular groove is 13-15mm and the height is 20-22mm.

[0010] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the length of the strip-shaped hole is 120-130 mm, and the width is 14-16 mm; the spacing between two adjacent strip-shaped holes is 140-150 mm.

[0011] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the diameter of the first round through hole is 3-5 mm, and the diameter of the second round through hole is 5-7 mm.

[0012] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the lengths of the first plate portion and the second plate portion are equal, and the lengths are 1180-1260 mm. The two ends of the connecting plate portion and the third plate portion are respectively contracted inwardly relative to the second plate portion, and two notches with a width of 10-20 mm are formed.

[0013] Furthermore, in the above-mentioned thin-walled special-shaped aviation oxygen bracket, the oxygen bracket is made of 7075-T73511 aluminum alloy material.

[0014] A method for preparing a thin-walled special-shaped aviation oxygen stent comprises the following steps:

[0015] (1) Aluminum rod casting: Aluminum ingots and auxiliary materials are smelted to obtain molten aluminum, and the molten aluminum is cast to obtain aluminum rods;

[0016] (2) Heating the aluminum rod: heating the obtained aluminum rod in an industrial frequency furnace to obtain a heated aluminum rod;

[0017] (3) Extrusion: The heated aluminum rod is placed in a preheated mold, and the mold is extruded using an extrusion device to obtain an extruded aluminum profile; a heat preservation device is provided between the industrial frequency furnace and the mold, and the temperature of the aluminum rod is maintained at 460°C during the heating and transfer process;

[0018] (4) Quenching: Quenching the extruded aluminum profile at a quenching rate of 120-130°C / s to obtain a quenched aluminum profile;

[0019] (5) Straightening: The quenched aluminum profile is straightened by straightening equipment to obtain a straightened aluminum profile semi-finished product;

[0020] (6) Segmented stamping: First, the processed aluminum profile is sawn into segments, and then the aluminum profile is stamped and formed four times using stamping equipment;

[0021] (7) Secondary aging: The aluminum profiles after segmented stamping are subjected to secondary aging treatment. First, they are heated to 110-130°C and kept warm for 6-8 hours; then they are heated to 160-180°C and kept warm for 8-10 hours. The furnace is opened to obtain the treated aluminum profiles.

[0022] Furthermore, in the method for preparing the above-mentioned thin-walled special-shaped aviation oxygen bracket, in the step (6) of segmented stamping, the four stamping processes are as follows: the first stamping forms a third plate portion with a notch and a gap, the second stamping forms a second circular through hole on the third plate portion, the third stamping forms a first circular through hole on the second plate portion, and the fourth stamping forms an arched through hole on the first plate portion.

[0023] The beneficial effects of the present invention are:

[0024] 1. The thin-walled special-shaped aviation oxygen stent provided by the present invention has a reasonable structural design, is conducive to extrusion molding, reduces the overall production cost, and its mechanical properties can meet the use requirements of the oxygen stent.

[0025] 2. In the process of extrusion molding of thin-walled special-shaped aviation oxygen brackets, the present invention adds a heat preservation device and increases the quenching rate, so that the quality of the aluminum profile product is stable and has good corrosion resistance. After segmented stamping, it is subjected to secondary aging treatment to eliminate the residual stress generated inside the aluminum profile, stabilize the shape, size, strength and hardness, and stably improve the final mechanical properties of the aluminum profile.

[0026] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the main structure of the thin-walled special-shaped aviation oxygen bracket of the present invention;

[0029] Figure 2 It is a side view structural schematic diagram of the thin-walled special-shaped aviation oxygen bracket of the present invention;

[0030] Figure 3 It is a schematic diagram of the main structure of the extruded part of the present invention after segmentation and before stamping;

[0031] Figure 4 It is a schematic side view of the structure of the extruded part of the present invention after segmentation and before stamping;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1-first plate portion, 2-second plate portion, 3-connecting plate portion, 4-third plate portion, 5-convex column, 6-first convex plate, 7-arched through hole, 8-first round through hole, 9-strip hole, 10-second round through hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-4As shown, this embodiment is a thin-walled special-shaped aviation oxygen bracket, which includes a first plate portion 1, a second plate portion 2, a connecting plate portion 3 and a third plate portion 4. One end of the second plate portion 2 is connected to the first plate portion 1, and the other end is connected to the third plate portion 4 through the connecting plate portion 3. The thickness of the first plate portion 1 is greater than the thickness of the second plate portion 2, and the thickness of the second plate portion 2 is equal to the thickness of the third plate portion 4. A protrusion 5 is provided at the bottom end of the first plate portion 1, and a first protrusion 6 is symmetrically provided near the protrusion 5 at the bottom of the first plate portion 1. A plurality of arched through holes 7 are uniformly provided at the bottom of the first plate portion 1 along its length direction, a plurality of first round through holes 8 are uniformly provided at the bottom of the second plate portion 2 along its length direction, and a plurality of strip holes 9 are uniformly provided at the top along its length direction. The angle between the third plate portion 4 and the second plate portion 2 is 160-170°. A notch is provided at the third plate portion 4 above the strip hole 9, and a plurality of second round through holes 10 are provided at the portion of the third plate portion 4 above the bottom surface of the notch along its length direction.

[0036] In this embodiment, the thickness of the first plate portion 1 is 2.3-2.5 mm, the outer diameter of the protrusion 5 is 3.7-3.9 mm, the thickness of the first protrusion plate 6 is 1.7-1.9 mm, and the thickness of the second plate portion 2 and the third plate portion 4 is 1.8-2.0 mm.

[0037] In this embodiment, the arched through hole 7 divides the first convex plates 6 on both sides into multiple plate sections. The upper part of the arched through hole 7 is a semicircular groove, and the lower part is a rectangular groove. The width of the rectangular groove is 13-15 mm and the height is 20-22 mm.

[0038] In this embodiment, the length of the strip holes 9 is 120-130 mm, and the width is 14-16 mm; the distance between two adjacent strip holes is 140-150 mm.

[0039] In this embodiment, the diameter of the first round through hole 8 is 3-5 mm, and the diameter of the second round through hole 10 is 5-7 mm.

[0040] In this embodiment, the first plate portion 1 and the second plate portion 2 are of equal length, 1180-1260 mm, and the two ends of the connecting plate portion 3 and the third plate portion 4 are respectively contracted inward relative to the second plate portion, and two notches with a width of 10-20 mm are formed.

[0041] In this embodiment, the oxygen support is made of 7075-T73511 aluminum alloy material.

[0042] This embodiment also provides a method for preparing a thin-walled special-shaped aviation oxygen stent, the method comprising the following steps:

[0043] (1) Aluminum rod casting: Aluminum ingots and auxiliary materials are melted to obtain molten aluminum, and the molten aluminum is cast to obtain aluminum rods;

[0044] (2) Heating the aluminum rod: heating the obtained aluminum rod in an industrial frequency furnace to obtain a heated aluminum rod;

[0045] (3) Extrusion: The heated aluminum rod is placed in a preheated mold, and the mold is extruded using an extrusion device to obtain an extruded aluminum profile; a heat preservation device is provided between the industrial frequency furnace and the mold, and the temperature of the aluminum rod is maintained at 460°C during the heating and transfer process;

[0046] (4) Quenching: The extruded aluminum profile is quenched by a fully enclosed water spray and air jet device at a quenching rate of 120-130°C / s to obtain a quenched aluminum profile;

[0047] (5) Straightening: The quenched aluminum profile is straightened by straightening equipment to obtain a straightened aluminum profile semi-finished product;

[0048] (6) Segmented stamping: First, the processed aluminum profile is sawn and segmented to obtain Figure 3-4 The structure shown in the figure is then subjected to four stamping processes on the aluminum profile in sections by using stamping equipment;

[0049] (7) Secondary aging: The aluminum profiles after segmented stamping are subjected to secondary aging treatment. First, they are heated to 110-130°C and kept warm for 6-8 hours; then they are heated to 160-180°C and kept warm for 8-10 hours. The furnace is opened to obtain the treated aluminum profiles. The aluminum profiles finally meet the mechanical properties of compressive strength of 512Mpa, yield strength of 428Mpa, elongation of 9.5%, and hardness of HRB 80.

[0050] Furthermore, in the method for preparing the thin-walled special-shaped aviation oxygen stent, in step (6) of the segmented stamping, the four stamping processes are as follows:

[0051] A third plate portion with notches and gaps is formed by a first stamping operation;

[0052] Punching for the second time to form a second round through hole on the third plate portion;

[0053] A third punching process forms a first round through hole on the second plate portion;

[0054] The fourth punching forms an arched through hole on the first plate portion.

[0055] The thin-walled special-shaped aviation oxygen bracket provided in this embodiment has a reasonable structural design, is conducive to extrusion molding, reduces the overall production and manufacturing costs, and its mechanical properties can meet the use requirements of the oxygen bracket. In the process of extrusion molding of the thin-walled special-shaped aviation oxygen bracket in this embodiment, a heat preservation device is added, and the quenching rate is increased, so that the quality of the aluminum profile product is stable and has good corrosion resistance. After the segmented stamping, the secondary aging treatment is performed to eliminate the residual stress generated inside the aluminum profile, stabilize the shape, size, strength and hardness, and stably improve the final mechanical properties of the aluminum profile.

[0056] The preferred embodiments of the present invention disclosed above are only useful to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A thin-walled special-shaped aviation oxygen stent, characterized in that: The oxygen support comprises a first plate portion, a second plate portion, a connecting plate portion and a third plate portion, one end of the second plate portion is connected to the first plate portion, and the other end is connected to the third plate portion via the connecting plate portion, the thickness of the first plate portion is greater than the thickness of the second plate portion, the thickness of the second plate portion is equal to the thickness of the third plate portion, a convex column is provided at the bottom end of the first plate portion, a first convex plate is symmetrically provided near the convex column at the bottom of the first plate portion, a plurality of arched through holes are uniformly provided at the bottom of the first plate portion along its length direction, a plurality of first round through holes are uniformly provided at the bottom of the second plate portion along its length direction, a plurality of strip holes are uniformly provided at the top along its length direction, an angle between the third plate portion and the second plate portion is 160-170°, a notch is provided at the third plate portion above the strip hole, and a plurality of second round through holes are provided at the portion of the third plate portion located above the bottom surface of the notch along its length direction; The thickness of the first plate portion is 2.3-2.5 mm, the outer diameter of the protrusion is 3.7-3.9 mm, and the thickness of the first protrusion plate is 1.7-1.9 mm; The thickness of the second plate portion and the third plate portion is 1.8-2.0 mm; The arched through hole separates the first convex plates on both sides into multiple plate sections. The upper part of the arched through hole is a semicircular groove, and the lower part is a rectangular groove. The width of the rectangular groove is 13-15mm and the height is 20-22mm.

2. The thin-walled special-shaped aviation oxygen bracket according to claim 1, characterized in that: The length of the strip holes is 120-130 mm, and the width is 14-16 mm; the spacing between two adjacent strip holes is 140-150 mm.

3. The thin-walled special-shaped aviation oxygen bracket according to claim 1, characterized in that: The diameter of the first round through hole is 3-5 mm, and the diameter of the second round through hole is 5-7 mm.

4. The thin-walled special-shaped aviation oxygen bracket according to claim 1, characterized in that: The first plate portion and the second plate portion have the same length, which is 1180-1260 mm. The two ends of the connecting plate portion and the third plate portion are respectively contracted inwardly relative to the second plate portion, and two notches with a width of 10-20 mm are formed.

5. The thin-walled special-shaped aviation oxygen bracket according to claim 1, characterized in that: The oxygen support is made of 7075-T73511 aluminum alloy material.

6. The thin-walled special-shaped aviation oxygen bracket according to claim 1, characterized in that: The preparation method of the oxygen stent comprises the following steps: (1) Aluminum rod casting: Aluminum ingots and auxiliary materials are smelted to obtain molten aluminum, and the molten aluminum is cast to obtain aluminum rods; (2) heating the aluminum rod: heating the obtained aluminum rod in an industrial frequency furnace to obtain a heated aluminum rod; (3) Extrusion: The heated aluminum rod is placed in a preheated mold, and the mold is extruded using an extrusion device to obtain an extruded aluminum profile; a heat preservation device is provided between the power frequency furnace and the mold, and the temperature of the aluminum rod is maintained at 460°C during the heating and transfer process; (4) Quenching: quenching the extruded aluminum profile at a quenching rate of 120-130°C / s to obtain a quenched aluminum profile; (5) Straightening: The quenched aluminum profile is straightened by a straightening device to obtain a straightened aluminum profile semi-finished product; (6) Segmented stamping: First, the processed aluminum profile is sawn into segments, and then the aluminum profile is stamped and formed four times using stamping equipment; (7) Secondary aging: The aluminum profile after segmented stamping is subjected to secondary aging treatment. First, it is heated to 110-130°C and kept warm for 6-8 hours; then it is heated to 160-180°C and kept warm for 8-10 hours. The furnace is opened to obtain the treated aluminum profile.

7. The thin-walled special-shaped aviation oxygen bracket according to claim 6, characterized in that: In step (6) of the segmented stamping, the four stamping processes are as follows: the first stamping forms a third plate portion with a notch and a gap, the second stamping forms a second circular through hole on the third plate portion, the third stamping forms a first circular through hole on the second plate portion, and the fourth stamping forms an arched through hole on the first plate portion.

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