Forging forming die for hub on outer side of airplane

Abstract

The utility model discloses a forging forming die of an airplane outer side hub, which relates to the technical field of aviation hub manufacturing, and comprises a forging lower die and a forging upper die, the forging lower die is provided with a cavity, the bottom wall of the cavity is provided with a first boss and a first convex ring, the first boss is arranged in the first convex ring, and a first ring groove is formed between the first boss and the first convex ring; and a second ring groove is formed between the first convex ring and the side wall of the cavity. The upper forging die is provided with a second boss and a second convex ring which are used for being embedded into the cavity, the second boss is arranged in the second convex ring, a third ring groove is formed between the second boss and the second convex ring, and a fourth ring groove is formed between the second convex ring and the side wall of the cavity. According to the forging forming die for the outer side hub of the airplane, the outer side hub forge piece can be integrally formed, the outer side hub forge piece can be further machined and manufactured to obtain the outer side hub of the airplane, the production process is simple, and machining is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation hub manufacturing, and more specifically to a forging die for an aircraft outer hub. Background Art

[0002] An aircraft outer wheel hub structure in the prior art, such as Figures 1 to 3 As shown in the figure, it is made of 2040 aluminum alloy. The part is mainly composed of an intermediate wheel shaft, a cylindrical outer circle and a base plate 101 connecting the two parts. Among them, the central wheel shaft part includes a lower boss 102 and an upper boss 103, and the cylindrical outer circle part includes a lower convex edge 104 and an upper convex edge 105. Since the structure of the part is relatively complex, how to prepare the outer wheel hub of the aircraft has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a forging die for an outer wheel hub of an aircraft, so as to prepare an outer wheel hub forging of the outer wheel hub of the aircraft.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A forging die for an aircraft outer wheel hub, comprising:

[0006] A forging lower die is provided with a cavity, a first boss and a first convex ring are provided on the bottom wall of the cavity, the first boss is arranged in the first convex ring, a first annular groove is formed between the first boss and the first convex ring, and a second annular groove is formed between the first convex ring and the side wall of the cavity;

[0007] The forging upper die is provided with a second boss and a second convex ring for embedding in the cavity, the second boss is arranged in the second convex ring, and a third annular groove is formed between the second boss and the second convex ring, and a fourth annular groove is formed between the second convex ring and the side wall of the cavity, when the forging lower die and the forging upper die are pressed together, the second boss is opposite to the first boss and has a gap, and the second convex ring is opposite to the first convex ring and has a gap.

[0008] Optionally, in the above-mentioned forging die for the outer wheel hub of the aircraft, a residual ring groove is provided on the side of the forging lower die facing the forging upper die, the residual ring groove is arranged around the cavity, and when the forging lower die and the forging upper die are pressed against each other, the residual ring groove is connected with the cavity.

[0009] Optionally, in the above-mentioned forging die of the outer wheel hub of the aircraft, the first convex ring includes a planar portion and a chamfered portion, the planar portion and the chamfered portion are both annular and arranged on the bottom wall of the cavity, and the chamfered portion is fitted on the inner ring of the planar portion, the top side surface of the planar portion is a planar structure, the outer periphery of the top side surface of the chamfered portion is engaged with the top side surface of the planar portion, and the inner periphery is inclined toward the direction of the forging upper die.

[0010] Optionally, in the above-mentioned forging die for the outer wheel hub of the aircraft, the forging lower die is a split structure and includes a body and a push rod;

[0011] The ejector rod is detachably arranged at the bottom of the body and forms the cavity together with the body. The body is provided with the flat surface.

[0012] The inclined portion and the first boss are provided.

[0013] Optionally, in the forging die for the outer wheel hub of the aircraft, a mounting hole is provided through the bottom of the body, the mounting hole connects the cavity with the outside and is a step-shaped structure with a step surface, and the step surface is arranged toward the cavity;

[0014] The push rod is a stepped rod-shaped structure including a rod body and a head, wherein the rod body is connected to the head and embedded in the mounting hole, and the end face of the first end of the head is in contact with the step surface, and the end face of the second end is provided with the inclined portion and the first boss.

[0015] Optionally, in the above-mentioned forging mold of the outer wheel hub of the aircraft, the side surfaces of the forging lower die and the forging upper die facing each other are respectively a lower pressing surface and an upper pressing surface, the lower pressing surface and the upper pressing surface are used to fit each other, and one of the upper pressing surface and the lower pressing surface is provided with a first positioning portion, and the other is provided with a second positioning portion for positioning and cooperating with the first positioning portion.

[0016] Optionally, in the forging die for the aircraft outer wheel hub, the first positioning portion includes a lock buckle, and the second positioning portion includes a lock groove for the lock buckle to be embedded in; and / or,

[0017] The first positioning portion includes a positioning hole, and the second positioning portion includes a positioning column for embedding in the positioning hole.

[0018] Optionally, in the forging die for the outer wheel hub of the aircraft, the number of the locking buckles and the number of the positioning holes are both multiple and are alternately arranged around the circumference of the cavity.

[0019] Optionally, in the forging die for the aircraft outer wheel hub, ends of the first boss and the first convex ring located in the die cavity are both rounded structures;

[0020] The connection parts between the first boss and the first convex ring and the bottom wall of the cavity are all rounded transition.

[0021] Optionally, in the forging die for the outer wheel hub of the aircraft, ends of the second boss and the second convex ring located in the die cavity are both rounded structures;

[0022] The connection parts between the second boss and the second convex ring and the forging upper die are all rounded transition.

[0023] The utility model provides a forging die for an outer wheel hub of an aircraft, comprising a forging lower die and a forging upper die, wherein the forging lower die is provided with a die cavity, the die cavity is used to form the outer wall surface of the outer wheel hub forging, a first boss and a first convex ring are provided on the bottom wall of the die cavity, the first boss is provided in the first convex ring, and a first annular groove is formed between the two, the first annular groove corresponds to the lower boss of the outer wheel hub forging, a second annular groove is formed between the first convex ring and the side wall of the die cavity, and the second annular groove corresponds to the lower convex edge of the outer wheel hub forging. The forging upper die is provided with a second boss and a second convex ring for embedding into the die cavity, the second boss is provided in the second convex ring, and a third annular groove is formed between the two, the third annular groove corresponds to the upper boss of the outer wheel hub forging, a fourth annular groove is formed between the second convex ring and the side wall of the die cavity, and the fourth annular groove corresponds to the upper convex edge of the outer wheel hub forging. When the forging lower die and the forging upper die are pressed together, the second boss is opposite to the first boss with a gap to form the center plate of the outer hub forging, and the second convex ring is opposite to the first convex ring with a gap to form the base plate of the outer hub forging.

[0024] Compared with the prior art, the forging die for the aircraft outer wheel hub provided by the utility model can realize the one-piece forming of the outer wheel hub forging, and the outer wheel hub forging can be further processed to obtain the aircraft outer wheel hub, with simple production process and convenient processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 Axonometric measurement of an outer wheel hub of an aircraft in the prior art Figure 1 ;

[0027] Figure 2 Axonometric measurement of an outer wheel hub of an aircraft in the prior art Figure 2 ;

[0028] Figure 3 It is a cross-sectional view of an outer wheel hub of an aircraft in the prior art;

[0029] Figure 4 It is a schematic diagram of the structure of the outer wheel hub forging;

[0030] Figure 5 It is a schematic diagram of the forming of the outer wheel hub forging;

[0031] Figure 6 It is a schematic diagram of the overall structure of the forging die for the outer wheel hub of an aircraft disclosed in an embodiment of the utility model;

[0032] Figure 7 A cross-sectional view of a forging die for an aircraft outer wheel hub disclosed in an embodiment of the utility model;

[0033] Figure 8 It is a schematic diagram of the structure of the forging upper die disclosed in the embodiment of the utility model;

[0034] Fig. 9 A schematic diagram of the structure of a forging lower die disclosed in an embodiment of the utility model;

[0035] Fig.10 It is a structural schematic diagram of another forging lower die disclosed in an embodiment of the utility model;

[0036] Fig.11 Schematic diagram of the positioning of the blank by the forging die disclosed in the embodiment of the utility model Figure 1 ;

[0037] Fig.12 Schematic diagram of the positioning of the blank by the forging die disclosed in the embodiment of the utility model Figure 2 ;

[0038] Fig.13 Schematic diagram of the positioning of the blank by the forging die disclosed in the embodiment of the utility model Figure 3 .

[0039] Wherein, 100 is the outer wheel hub of the aircraft, 101 is the base plate, 102 is the lower boss, 103 is the upper boss, 104 is the lower flange, 105 is the upper flange, 106 is the through hole, 107 is the center plate, and 110 is the outer wheel hub forging;

[0040] 200 for blank;

[0041] 300 is a forging die, 310 is a forging upper die, 311 is a second boss, 312 is a second convex ring, 313 is a lock buckle, 314 is a positioning hole, 320 is a forging lower die, 321 is a first boss, 322 is a first convex ring, 3221 is a flat portion, 3222 is an inclined portion, 323 is a residual ring groove, 324 is a locking groove, 325 is a positioning column, and 330 is a push rod. DETAILED DESCRIPTION

[0042] The core of the utility model is to disclose a forging forming die for an outer wheel hub of an aircraft so as to prepare an outer wheel hub forging of the outer wheel hub of the aircraft.

[0043] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0044] Combination Figure 1-Figure 3 Since the size and shape of the aircraft outer wheel hub 100 are incompatible with the existing forging die cavity, it is impossible to directly use the existing forging die for forging. This requires the design of a special forging forming die to ensure that the size and shape of the outer wheel hub forging 110 can meet the use requirements.

[0045] Combination Figure 5 The forging die for the outer wheel hub of an aircraft disclosed in the utility model (hereinafter referred to as the forging die 300) is used to integrally form a blank 200 into an outer wheel hub forging 110, combined with Figure 3 and Figure 4 The outer hub forging 110 has the same main structure as the outer hub 100 of the aircraft, including a base plate 101, a lower boss 102, an upper boss 103, a lower flange 104 and an upper flange 105. The main difference between the two is that the outer hub forging 110 does not have a through hole 106, but a center plate 107 structure. The center plate 107 can be processed in subsequent processes to form a through hole 106.

[0046] Combination Figure 6-Figure 10The forging die 300 includes a forging lower die 320 and a forging upper die 310. The forging lower die 320 is provided with a cavity, and the cavity is used to form the outer wall surface of the outer hub forging 110. A first boss 321 and a first convex ring 322 are provided on the bottom wall of the cavity. The first boss 321 is arranged in the first convex ring 322, and a first annular groove is formed therebetween. The first annular groove corresponds to the lower boss 102 of the outer hub forging 110. A second annular groove is formed between the first convex ring 322 and the side wall of the cavity, and the second annular groove corresponds to the lower convex edge 104 of the outer hub forging 110.

[0047] The forging upper die 310 is provided with a second boss 311 and a second convex ring 312 for embedding into the cavity. The second boss 311 is arranged in the second convex ring 312, and a third annular groove is formed between the two. The third annular groove corresponds to the upper boss 103 of the outer wheel hub forging 110. The second convex ring 312 and the side wall of the cavity are used to form a fourth annular groove, which corresponds to the upper convex edge 105 of the outer wheel hub forging 110. When the forging lower die 320 and the forging upper die 310 are pressed together, the second boss 311 is opposite to the first boss 321 with a gap to form the center plate 107 of the outer wheel hub forging 110, and the second convex ring 312 is opposite to the first convex ring 322 with a gap to form the base plate 101 of the outer wheel hub forging 110.

[0048] The above-mentioned cavity, first boss 321, first convex ring 322, second boss 311 and second convex ring 312 can ensure the shape and size of the outer wheel hub forging 110 during the forging process, and obtain the outer wheel hub forging 110 that meets the requirements. Compared with the prior art, the forging mold 300 disclosed in the utility model can realize the integral molding of the outer wheel hub forging 110, and the outer wheel hub forging 110 can be further processed to obtain the outer wheel hub 100 of the aircraft, with simple production process and convenient processing.

[0049] Combination Figure 7 The forging lower die 320 is provided with a surplus annular groove 323 on one side facing the forging upper die 310. The surplus annular groove 323 surrounds the cavity and is connected to the cavity when the forging lower die 320 and the forging upper die 310 are pressed together. The surplus annular groove 323 can be used for exhaust and to accommodate excess metal material.

[0050] Furthermore, the first convex ring 322 includes a plane portion 3221 and a sloped portion 3222, both of which are annular and arranged on the forging lower die 320 (the bottom wall of the cavity), and the sloped portion 3222 is fitted on the inner ring of the plane portion 3221, the top side surface of the plane portion 3221 (the plane facing away from the bottom wall of the cavity) is a plane structure, the outer periphery of the top side surface of the sloped portion 3222 (the plane facing away from the bottom wall of the cavity) is engaged with the top side surface of the plane portion 3221, and the inner periphery is inclined toward the direction of the forging upper die 310 to further shape the outer shape of the outer hub forging 110 toward the outer hub 100 of the aircraft.

[0051] Combination Figure 7 and Figure 4 , and Figure 4 The up-down direction shown in the figure is the up-down direction of the outer hub forging 110. The change in the inclination angle of the top side surface of the inclined portion 3222 and the flat portion 3221 is adapted to the change in the shape of the bottom surface of the base plate 101 of the outer hub forging 110. Similarly, the shape of the second convex ring 312 is adapted to the change in the shape of the top surface of the base plate 101, which will not be described in detail here.

[0052] Generally, the outer wheel hub forging 110 will remain in the forging lower die 320 after being formed. The forging die 300 can be demoulded by using a jaw or a push rod 330 .

[0053] Combination Fig.10 In one embodiment, the forging lower die 320 is a split structure and includes a main body and a push rod 330. The push rod 330 is detachably arranged at the bottom of the main body and forms the above-mentioned cavity together with the main body. A flat surface portion 3221 is arranged on the main body, and an inclined surface portion 3222 and a first boss 321 are arranged on the push rod 330.

[0054] Specifically, a mounting hole is provided through the bottom of the body, the mounting hole connects the cavity with the outside, and is a step-shaped structure with a step surface, and the step surface is arranged toward the cavity, the ejector 330 is a stepped rod structure including a rod body and a head, the rod body and the head are connected and embedded in the mounting hole, and the end surface of the first end of the head is in contact with the step surface, and the end surface of the second end is provided with a chamfer 3222 and a first boss 321. The outer hub forging 110 after forming can be pushed out of the cavity by pushing the ejector 330.

[0055] In order to ensure the accuracy of the alignment of the forging lower die 320 and the forging upper die 310 during the forming process of the outer wheel hub forging 110, the side surfaces of the forging lower die 320 and the forging upper die 310 facing each other are defined as a lower pressing surface and an upper pressing surface, respectively. The lower pressing surface and the upper pressing surface are used to fit each other during the forming process of the outer wheel hub forging 110. A first positioning portion is provided on one of the upper pressing surface and the lower pressing surface, and a second positioning portion for positioning and cooperating with the first positioning portion is provided on the other. Through the positioning and cooperation of the first positioning portion and the second positioning portion, accurate alignment of the forging lower die 320 and the forging upper die 310 can be achieved.

[0056] Specifically, the first positioning portion includes a lock buckle 313 , and the second positioning portion includes a lock groove 324 for the lock buckle 313 to be embedded in; or, the first positioning portion includes a positioning hole 314 , and the second positioning portion includes a positioning column 325 for being embedded in the positioning hole 314 .

[0057] In the forging die 300 , the lock buckle 313 , the positioning hole 314 , the locking groove 324 and the positioning column 325 can be provided together, and the number is usually multiple, for example, two, and they are alternately arranged around the cavity or the residual annular groove 323 .

[0058] Combination Figure 8 and Fig. 9 , which shows a structure in which the main bodies of the forging lower die 320 and the forging upper die 310 are both in the shape of a cuboid (the lower pressing surface and the upper pressing surface are both rectangular), and there are two lock buckles 313 and two positioning holes 314, which are arranged diagonally. In addition, the outer shapes of the forging lower die 320 and the forging upper die 310 can also be cylindrical.

[0059] Combination Fig.10 and Figure 7 The ends of the first boss 321 and the first convex ring 322 located in the cavity are both rounded structures, and the connection parts between the first boss 321 and the first convex ring 322 and the bottom wall of the cavity are both rounded transition; the ends of the second boss 311 and the second convex ring 312 located in the cavity are both rounded structures, and the connection parts between the second boss 311 and the second convex ring 312 and the forging upper die 310 are rounded transition, so as to reduce stress concentration, improve the quality of the outer hub forging 110, reduce forging defects, and facilitate demolding.

[0060] The side wall of the cavity is a curved surface structure that matches the outer wall shape of the lower flange 104 and the upper flange 105 of the outer wheel hub forging 110. Figure 11-13 According to the different diameters of the blank 200, the positioning method of the blank 200 during forging can be divided into two types: at the uppermost bridge portion ( Fig.11 On the dividing side wall between the medium cavity and the residual ring groove 323), on the middle platform ( Fig.12The concave part of the side wall of the middle cavity) and at the bottom of the cavity ( Fig.13 The three different positioning methods correspond to different filling orders of the forgings and different forming results, which can be selected according to actual conditions.

[0061] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed in this article.

Claims

1. A forging die for an aircraft outer wheel hub, characterized in that: include: A forging lower die (320) is provided with a cavity, a first boss (321) and a first convex ring (322) are provided on the bottom wall of the cavity, the first boss (321) is arranged in the first convex ring (322), a first annular groove is formed between the first boss (321) and the first convex ring (322), and a second annular groove is formed between the first convex ring (322) and the side wall of the cavity; The forging upper die (310) is provided with a second boss (311) and a second convex ring (312) for embedding into the cavity; the second boss (311) is arranged in the second convex ring (312), and a third annular groove is formed between the second boss (311) and the second convex ring (312); a fourth annular groove is formed between the second convex ring (312) and the side wall of the cavity; when the forging lower die (320) and the forging upper die (310) are pressed together, the second boss (311) and the first boss (321) are opposite to each other and have a gap, and the second convex ring (312) and the first convex ring (322) are opposite to each other and have a gap.

2. The forging die for the aircraft outer wheel hub according to claim 1, characterized in that: A residual annular groove (323) is provided on a side of the forging lower die (320) facing the forging upper die (310); the residual annular groove (323) is arranged around the die cavity, and when the forging lower die (320) and the forging upper die (310) are pressed together, the residual annular groove (323) is communicated with the die cavity.

3. The forging die for the aircraft outer wheel hub according to claim 1, characterized in that: The first convex ring (322) includes a plane portion (3221) and an inclined portion (3222), the plane portion (3221) and the inclined portion (3222) are both annular and arranged on the bottom wall of the cavity, and the inclined portion (3222) is arranged in a close fit with the inner ring of the plane portion (3221), the top side surface of the plane portion (3221) is a plane structure, the outer periphery of the top side surface of the inclined portion (3222) is connected to the top side surface of the plane portion (3221), and the inner periphery is inclined toward the direction of the forging upper die (310).

4. The forging die for the aircraft outer wheel hub according to claim 3, characterized in that: The forging lower die (320) is a split structure and comprises a body and a push rod (330); The push rod (330) is detachably arranged at the bottom of the body and forms the mold cavity together with the body. The body is provided with the plane portion (3221). The inclined portion (3222) and the first boss (321) are provided.

5. The forging die for the aircraft outer wheel hub according to claim 4, characterized in that: A mounting hole is formed through the bottom of the body, the mounting hole connects the cavity with the outside, and is a step-shaped structure with a step surface, and the step surface is arranged toward the cavity; The push rod (330) is a stepped rod-shaped structure comprising a rod body and a head, wherein the rod body is connected to the head and embedded in the mounting hole, and the end surface of the first end of the head is in contact with the step surface, and the end surface of the second end is provided with the inclined portion (3222) and the first boss (321).

6. The forging die for the aircraft outer wheel hub according to claim 1, characterized in that: The side surfaces of the forging lower die (320) and the forging upper die (310) facing each other are respectively a lower pressing surface and an upper pressing surface, the lower pressing surface and the upper pressing surface are used to fit each other, and one of the upper pressing surface and the lower pressing surface is provided with a first positioning portion, and the other is provided with a second positioning portion for positioning and cooperating with the first positioning portion.

7. The forging die for the aircraft outer wheel hub according to claim 6, characterized in that: The first positioning portion comprises a lock buckle (313), and the second positioning portion comprises a lock groove (324) for the lock buckle (313) to be embedded; and / or, The first positioning portion comprises a positioning hole (314), and the second positioning portion comprises a positioning column (325) for being embedded in the positioning hole (314).

8. The forging die for the aircraft outer wheel hub according to claim 7, characterized in that: The locking buckles (313) and the positioning holes (314) are both multiple and are alternately arranged around the circumference of the cavity.

9. The forging die for an aircraft outer wheel hub according to claim 1, characterized in that: The ends of the first boss (321) and the first convex ring (322) located in the cavity are both rounded structures, and the connection parts between the first boss (321) and the first convex ring (322) and the bottom wall of the cavity are both rounded transitions.

10. The forging die for an aircraft outer wheel hub according to claim 1, characterized in that: The ends of the second boss (311) and the second convex ring (312) located in the cavity are both rounded structures, and the connection parts between the second boss (311) and the second convex ring (312) and the forging upper die (310) are both rounded transition.

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