One-step forming composite die for aircraft engine retainer ring

Abstract

The invention relates to the technical field of engine clamping ring forming equipment, in particular to a one-time forming composite die for an aircraft engine clamping ring. According to the one-time forming composite die for the aircraft engine retainer ring, the technical problem that in the prior art, an aircraft engine retainer ring forming die cannot conduct one-time forming on the retainer ring, and consequently the retainer ring is difficult to form is solved. A one-time forming composite die for an aircraft engine clamping ring comprises an upper die assembly. The lower die assembly is positioned below the upper die assembly; the lower die assembly is connected to the die holder in a sliding manner; the lower die assembly comprises a main die, a first auxiliary die and a second auxiliary die, the lower die assembly is connected to the die base in a sliding mode, the male die is matched with the die cavity to form the arc portion of the clamping ring, and then the two bent portions of the clamping ring are sequentially formed. According to the scheme, the clamping ring can be formed at a time, the production efficiency of the clamping ring is effectively improved, and the manufacturing cost of the clamping ring is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engine snap ring forming equipment, and particularly relates to a one-time forming composite die for an aircraft engine snap ring. Background Art

[0002] The aircraft engine snap ring includes an arc-shaped portion greater than a semi-circle and bending portions provided at both ends of the arc-shaped portion. The bending portions are parts bent outward from the arc-shaped portion. Therefore, the shape of the snap ring is an irregular shape.

[0003] In the prior art, a stamping forming device is usually used to form the snap ring. Since the shape of the snap ring is an irregular shape, it is impossible to form the snap ring by a one-time forming method, resulting in difficult snap ring forming and high manufacturing costs.

[0004] Therefore, the prior art aircraft engine snap ring forming die has the technical problem that it cannot form the snap ring in one time, resulting in difficult snap ring forming. Summary of the Invention

[0005] A one-time forming composite die for an aircraft engine snap ring provided by the present invention solves the technical problem that the prior art aircraft engine snap ring forming die cannot form the snap ring in one time, resulting in difficult snap ring forming.

[0006] Some implementation schemes for solving the above technical problems include:

[0007] A one-time forming composite die for an aircraft engine snap ring includes an upper die assembly;

[0008] A lower die assembly, the lower die assembly being located below the upper die assembly;

[0009] And a die base, the lower die assembly being slidably connected to the die base;

[0010] The lower die assembly includes a main die slidably connected to the die base in the vertical direction. The lower die assembly further includes a first sub-die and a second sub-die, and both the first sub-die and the second sub-die are slidably connected to the main die in the horizontal direction;

[0011] The main die is provided with a die cavity for forming the arc portion of the snap ring. The first sub-die is provided with a first die portion for forming the bending portion of the snap ring, and the second sub-die is provided with a second die portion for forming the other bending portion of the snap ring;

[0012] The upper die assembly is provided with a punch cooperating with the die cavity, a first cooperating portion cooperating with the first die portion, and a second cooperating portion cooperating with the second die portion;

[0013] The die base is provided with an elastic member for supporting the lower die assembly. Among them, the elastic acting force of the elastic member is greater than the acting force borne by the main die when forming the arc portion of the snap ring;

[0014] The die base is provided with a guide for guiding the main die. A first guide is provided between the first sub-die and the die base to guide the first sub-die to move horizontally. A second guide is provided between the second sub-die and the die base to guide the second sub-die to move horizontally.

[0015] The forming method using the one-step forming composite die for the aircraft engine snap ring includes the following steps:

[0016] The upper die assembly moves downward a first distance relative to the lower die assembly. Under the elastic force of the elastic member, the punch cooperates with the die cavity to form the arc portion of the snap ring.

[0017] Overcoming the elastic action of the elastic member, the upper die assembly moves downward a second distance relative to the lower die assembly. The first guide causes the first die part to cooperate with the first mating part to form one of the bent portions of the snap ring.

[0018] Overcoming the elastic force of the elastic member, the upper die assembly moves downward a third distance relative to the lower die assembly. The second guide causes the second die part to cooperate with the second mating part to form the other bent portion of the snap ring.

[0019] After the snap ring is formed, the upper die assembly moves upward a fourth distance relative to the lower die assembly. The first guide and the second guide cause the first sub-die and the second sub-die to move away from each other horizontally, and the elastic member pushes the main die and the punch to remain in cooperation.

[0020] The upper die assembly moves upward a fifth distance relative to the lower die assembly. The punch is disengaged from the main die to prepare for the next forming.

[0021] Preferably, the first guide includes a first slider provided on the first sub-die. The first guide further includes a first chute provided on the main die. The first slider cooperates with the first chute.

[0022] Preferably, the first guide further includes a first guide groove provided on the die base. The first guide further includes a first sliding column provided on the first sub-die. The first sliding column cooperates with the first guide groove. The first guide groove drives the first sub-die to displace horizontally relative to the main die through the first sliding column.

[0023] Preferably, the cross-sectional shape of the first sliding column is circular, the first guide groove is strip-shaped, and the first guide groove is inclined.

[0024] Preferably, the second guide includes a second slider disposed on the second sub-mold, and the second guide further includes a second chute disposed on the main mold, and the second slider is engaged with the second chute.

[0025] Preferably, the second guide further includes a second guide groove disposed on the mold base, and the second guide further includes a second sliding column disposed on the second sub-mold, and the second sliding column is engaged with the second guide groove, and the second guide groove drives the second sub-mold to displace horizontally relative to the main mold through the second sliding column.

[0026] Preferably, the cross-sectional shape of the second sliding column is circular, the second guide groove is strip-shaped, and the second guide groove is inclined.

[0027] Preferably, the guide includes a guide post disposed on the mold base, and the main mold is provided with a guide hole engaged with the guide post, and the guide hole penetrates through the main mold.

[0028] Preferably, the cross-sectional shape of the guide post is polygonal, and the guide post and the mold base are of an integral structure.

[0029] Preferably, the elastic member is a spring, one end of the spring is fixed to the main mold, and the other end of the elastic member is fixed to the mold base.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The lower mold assembly includes a main mold, a first sub-mold and a second sub-mold, and the lower mold assembly is slidably connected to the mold base. When the upper mold assembly moves downward, the convex mold first cooperates with the mold cavity to form the arc portion of the snap ring, and then, the upper mold assembly continues to move downward to the lower mold assembly to form the two bent portions of the snap ring in sequence. During demolding, first, the first sub-mold and the second sub-mold are horizontally moved and separated from each other, and then, the upper mold assembly is separated from the lower mold assembly. This solution can realize one-time forming of the snap ring, effectively improve the production efficiency of the snap ring, and reduce the manufacturing cost of the snap ring.

[0032] At the same time, since the two bent portions of the snap ring are formed in sequence, when forming the bent portions, the first sub-mold and the second sub-mold do not need to bear excessive forces, and since the two bent portions are formed in sequence, the deformation amplitude of the snap ring deforming simultaneously can be reduced, and the snap ring is not easily damaged during the forming process, improving the forming accuracy during the forming process of the snap ring. Description of the Drawings

[0033] For purposes of explanation, several embodiments of the technology of the present invention are illustrated in the following drawings. The following drawings are incorporated herein and constitute a part of the specific embodiments. In some cases, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the subject technology of the present invention.

[0034] Figure 1 This is the front view of the present invention.

[0035] Figure 2 This is a schematic diagram when forming the arc portion of the present invention.

[0036] Figure 3 This is a schematic diagram after the snap ring of the present invention is formed.

[0037] Figure 4 This is a schematic diagram when the first guiding groove includes a holding portion.

[0038] Figure 5 This is a schematic diagram of the present invention.

[0039] Figure 6 This is a schematic diagram of the die base.

[0040] Figure 7 This is a schematic diagram of the main die.

[0041] Figure 8 This is a schematic diagram of the first sub-die.

[0042] Figure 9 This is a schematic diagram of the snap ring of an aircraft engine.

[0043] As shown in the figure:

[0044] 1. Upper die assembly, 11. Punch, 12. First mating portion, 13. Second mating portion.

[0045] 2. Lower die assembly, 21. Main die, 211. Die cavity, 212. First sliding groove, 213. Second sliding groove, 22. First sub-die, 221. First die portion, 222. First slider, 223. First sliding column, 23. Second sub-die, 231. Second die portion, 232. Second sliding column.

[0046] 3. Die base, 31. Elastic member, 32. First guiding groove, 33. Second guiding groove, 34. Guide post.

[0047] 101. Arc portion, 102. Bending portion. Detailed implementation manners

[0048] The specific embodiments shown below are intended as descriptions of various configurations of the subject technology of the present invention, and are not intended to represent the only configurations in which the subject technology of the present invention can be practiced. The specific embodiments include specific details intended to provide a thorough understanding of the subject technology of the present invention. However, it will be clear and obvious to those skilled in the art that the subject technology of the present invention is not limited to the specific details shown herein, and can be practiced without these specific details.

[0049] It can be understood that, herein, relational terms such as "first" and "second" are intended to distinguish one entity or operation from another entity or operation, and are not intended to expressly or impliedly indicate any actual relationship or order between these entities or operations.

[0050] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0051] Referring to Figures 1 to 9 as shown, a one-time forming composite die for an aircraft engine snap ring includes an upper die assembly 1;

[0052] a lower die assembly 2, the lower die assembly 2 being located below the upper die assembly 1;

[0053] and a die base 3, the lower die assembly 2 being slidably connected to the die base 3;

[0054] The lower die assembly 2 includes a main die 21 slidably connected to the die base 3 in the vertical direction. The lower die assembly 2 further includes a first sub-die 22 and a second sub-die 23, and both the first sub-die 22 and the second sub-die 23 are slidably connected to the main die 21 in the horizontal direction;

[0055] The main die 21 is provided with a die cavity 211 for forming the snap ring arc portion 101. The first sub-die 22 is provided with a first die portion 221 for forming the snap ring bending portion 102, and the second sub-die 23 is provided with a second die portion 231 for forming the other bending portion 102 of the snap ring;

[0056] The upper die assembly 1 is provided with a punch 11 cooperating with the die cavity 211, a first cooperating portion 12 cooperating with the first die portion 221, and a second cooperating portion 13 cooperating with the second die portion 231;

[0057] The die holder 3 is provided with an elastic member 31 for supporting the lower die assembly 2, wherein the elastic acting force of the elastic member 31 is greater than the acting force borne by the main die 21 during the forming of the clamping ring arc portion 101;

[0058] The die holder 3 is provided with a guide for guiding the main die 21. A first guide for guiding the first sub-die 22 to move horizontally is arranged between the first sub-die 22 and the die holder 3, and a second guide for guiding the second sub-die 23 to move horizontally is arranged between the second sub-die 23 and the die holder 3;

[0059] Refer to Figures 1 to 3 As shown, the forming method using the one-step forming composite die for the aircraft engine clamping ring includes the following steps:

[0060] The upper die assembly 1 moves downward relative to the lower die assembly 2 by a first distance. Under the elastic acting force of the elastic member 31, the punch 11 cooperates with the die cavity 211 to form the clamping ring arc portion 101;

[0061] Overcoming the elastic action of the elastic member 31, the upper die assembly 1 moves downward relative to the lower die assembly 2 by a second distance. The first guide causes the first die part 221 to cooperate with the first mating part 12 to form one of the bent portions 102 of the clamping ring;

[0062] Overcoming the elastic acting force of the elastic member 31, the upper die assembly 1 moves downward relative to the lower die assembly 2 by a third distance. The second guide causes the second die part 231 to cooperate with the second mating part 13 to form the other bent portion 102 of the clamping ring;

[0063] After the clamping ring is formed, the upper die assembly 1 moves upward relative to the lower die assembly 2 by a fourth distance. The first guide and the second guide cause the first sub-die 22 and the second sub-die 23 to move away from each other horizontally, and the elastic member 31 pushes the main die 21 to remain in cooperation with the punch 11;

[0064] The upper die assembly 1 moves upward relative to the lower die assembly 2 by a fifth distance, and the punch 11 is disengaged from the main die 21 to prepare for the next forming.

[0065] Refer to Figures 1 to 9 As shown, specifically, the clamping ring is usually formed by stamping and bending a strip-shaped plate. During the forming process, when the simultaneous bending amplitude is too large, the plate forming the clamping ring may be damaged, fractured, etc. Therefore, when forming the clamping ring, the two bent portions 102 are formed in a step-by-step manner, so that the amplitude of the material bent simultaneously becomes smaller, thereby reducing the internal stress of the material and making the material not easily fractured during the forming process.

[0066] Understandably, in order to facilitate demolding and make the arc portion 101 of the snap ring have higher forming accuracy, the cross-sectional shape of the mold cavity 211 is usually semi-circular, that is, the length of the opening of the mold cavity 211 is equal to the diameter of the mold cavity 211. Since the punch 11 and the mold cavity 211 have good matching performance, the arc portion 101 of the snap ring has higher forming accuracy.

[0067] The other parts of the snap ring, namely the two bent portions 102, are formed by the cooperation of the first sub-mold 22 and the second sub-mold 23 with the upper mold assembly 1.

[0068] In some embodiments, the first guide includes a first slider 222 provided on the first sub-mold 22, and the first guide further includes a first chute 212 provided on the main mold 21, and the first slider 222 cooperates with the first chute 212.

[0069] In some embodiments, the cross-sectional shape of the first chute 212 is a trapezoid with a wider upper part and a narrower lower part to prevent the first sub-mold 22 from detaching from the main mold 21 in the vertical direction.

[0070] Understandably, the cross-sectional shape of the first chute 212 can also be other shapes.

[0071] Refer to Figures 1 to 9 As shown, in some embodiments, the first guide further includes a first guide groove 32 provided on the mold base 3, and the first guide further includes a first sliding column 223 provided on the first sub-mold 22, and the first sliding column 223 cooperates with the first guide groove 32, and the first guide groove 32 drives the first sub-mold 22 to displace horizontally relative to the main mold 21 through the first sliding column 223.

[0072] In some embodiments, the cross-sectional shape of the first sliding column 223 is circular, the first guide groove 32 is strip-shaped, and the first guide groove 32 is inclined.

[0073] The first sliding column 223 and the first sub-mold 22 can be of an integral structure.

[0074] In some embodiments, the second guide includes a second slider provided on the second sub-mold 23, and the second guide further includes a second chute 213 provided on the main mold 21, and the second slider cooperates with the second chute 213.

[0075] The cross-sectional shape of the second chute 213 is set with reference to the cross-sectional shape of the first chute 212. Usually, the cross-sectional shape of the first chute 212 can be the same as that of the second chute 213, or the cross-sectional shape of the first chute 212 can also be different from that of the second chute 213.

[0076] Refer toFigures 1 to 9 As shown, in some embodiments, the second guide further includes a second guide groove 33 provided on the mold base 3, and the second guide further includes a second sliding column 232 provided on the second sub-mold 23. The second sliding column 232 cooperates with the second guide groove 33, and the second guide groove 33 drives the second sub-mold 23 to displace horizontally relative to the main mold 21 through the second sliding column 232.

[0077] In some embodiments, the cross-sectional shape of the second sliding column 232 is circular, the second guide groove 33 is strip-shaped, and the second guide groove 33 is inclined.

[0078] In some embodiments, the second sliding column 232 and the second sub-mold 23 may be of an integral structure.

[0079] When the first sliding groove 212 and the second sliding groove 213 are both inclined, the first sliding groove 212 and the second sliding groove 213 have different inclination angles, so that the two bending portions 102 are not formed simultaneously, or one of the bending portions 102 has a larger deformation amplitude, while the other bending portion 102 has a relatively smaller deformation amplitude.

[0080] Refer to Figure 4 As shown, it can be understood that since the two bending portions 102 are formed in a sequential forming manner, in some embodiments, the first sliding groove 212 may include a forming portion and a holding portion, and the forming portion communicates with the holding portion. The holding portion is arranged in the vertical direction. Specifically, when the upper mold assembly 1 moves downward, when the first sub-mold 22 moves within the range defined by the forming portion, the second sub-mold 23 does not move, or the moving amplitude of the second sub-mold 23 is not sufficient to form the bending portion 102.

[0081] After the first sub-mold 22 forms one of the bending portions 102, the first sliding column 223 enters the holding portion. At this time, when the upper mold assembly 1 continues to move downward, the horizontal position of the first sub-mold 22 remains unchanged, while the second sub-mold 23 begins to form the other bending portion 102.

[0082] In some embodiments, the mold base 3 is provided with vertical plates, and the first sliding groove 212 and the second slider are both arranged on the vertical plates. There are two vertical plates, and a guiding cavity is formed between the two vertical plates, and the upper mold assembly 1 displaces within the guiding cavity.

[0083] In some embodiments. There may also be four vertical plates, and two of the vertical plates form a first guiding cavity, and the first sub-mold 22 is located in the first guiding cavity.

[0084] The other two vertical plates form a second guiding cavity, and the second sub-mold 23 is located in the second guiding cavity.

[0085] In some embodiments, the vertical plate and the mold base 3 can be an integral structure. Alternatively, the vertical plate and the mold base 3 can also be fixed by welding or bolt connection.

[0086] In some embodiments, the guide includes a guide post 34 disposed on the mold base 3, and the main mold 21 is provided with a guide hole that cooperates with the guide post 34, and the guide hole penetrates through the main mold 21.

[0087] In some embodiments, the cross-sectional shape of the guide post 34 is polygonal, and the guide post 34 and the mold base 3 are an integral structure.

[0088] In some embodiments, the guide post 34 can be an integral structure with the mold base 3, or the guide post 34 can be welded to the mold base 3.

[0089] In some embodiments, the elastic member 31 is a spring, one end of the spring is fixed to the main mold 21, and the other end of the elastic member 31 is fixed to the mold base 3.

[0090] In some embodiments, the upper end of the spring can be fixed to the main mold 21 by a bolt, and the lower end of the spring can be fixed to the mold base 3 by a bolt.

[0091] In some embodiments, the upper mold assembly 1 can be fixed to the piston rod of the hydraulic press by detachable connection or non-detachable connection.

[0092] The above introduces the technical solutions of the subject matter of the present invention and the corresponding details. It can be understood that the above introduction is only some implementation solutions of the technical solutions of the subject matter of the present invention, and some details can also be omitted during its specific implementation.

[0093] In addition, in some implementation solutions of the above invention, it is possible to combine multiple implementation solutions. Due to space limitations, various combination schemes are not listed one by one. Those skilled in the art can freely combine and implement the above implementation solutions according to needs during specific implementation to obtain a better application experience.

[0094] When implementing the technical solutions of the subject matter of the present invention, those skilled in the art can obtain other detailed configurations or drawings according to the technical solutions of the subject matter of the present invention and the drawings. Obviously, without departing from the technical solutions of the subject matter of the present invention, these details still fall within the scope covered by the technical solutions of the subject matter of the present invention.

Claims

1. A composite die for one-step forming of an aircraft engine clamp ring, characterized in that: It comprises an upper mold assembly (1); A lower mold assembly (2), wherein the lower mold assembly (2) is located below the upper mold assembly (1); and a die base (3), the lower die assembly (2) being slidably connected to the die base (3); The lower mold assembly (2) comprises a main mold (21) slidably connected to the mold base (3) in a vertical direction, and the lower mold assembly (2) further comprises a first sub-mold (22) and a second sub-mold (23), wherein the first sub-mold (22) and the second sub-mold (23) are both slidably connected to the main mold (21) in a horizontal direction; The main mold (21) is provided with a mold cavity (211) for forming the arc portion (101) of the collar, the first sub-mold (22) is provided with a first mold portion (221) for forming the bending portion (102) of the collar, and the second sub-mold (23) is provided with a second mold portion (231) for forming another bending portion (102) of the collar; The upper mold assembly (1) is provided with a male mold (11) cooperating with the mold cavity (211), a first cooperating portion (12) cooperating with the first mold portion (221), and a second cooperating portion (13) cooperating with the second mold portion (231); The mold base (3) is provided with an elastic member (31) for supporting the lower mold assembly (2), wherein the elastic force of the elastic member (31) is greater than the force borne by the main mold (21) when the arc portion (101) of the clamping ring is formed; The mold base (3) is provided with a guide for guiding the main mold (21); a first guide for guiding the first sub-mold (22) to move in a horizontal direction is provided between the first sub-mold (22) and the mold base (3); and a second guide for guiding the second sub-mold (23) to move in a horizontal direction is provided between the second sub-mold (23) and the mold base (3); The molding method using the composite mold for one-step molding of the aircraft engine clamp ring comprises the following steps: The upper mold assembly (1) moves downwards by a first distance relative to the lower mold assembly (2), and under the elastic force of the elastic member (31), the male mold (11) cooperates with the mold cavity (211) to form the arc portion (101) of the clamping ring; To overcome the elastic effect of the elastic member (31), the upper mold assembly (1) moves downward a second distance relative to the lower mold assembly (2), and the first guide enables the first mold portion (221) to cooperate with the first matching portion (12) to form one of the bent portions (102) of the collar; To overcome the elastic force of the elastic member (31), the upper mold assembly (1) moves downward a third distance relative to the lower mold assembly (2), and the second guide enables the second mold portion (231) to cooperate with the second matching portion (13) to form another bent portion (102) of the collar; After the collar is formed, the upper mold assembly (1) moves upwards by a fourth distance relative to the lower mold assembly (2), the first guide and the second guide cause the first sub-mold (22) and the second sub-mold (23) to move away from each other horizontally, and the elastic member (31) pushes the main mold (21) to maintain cooperation with the punch (11); The upper mold assembly (1) moves upwards by a fifth distance relative to the lower mold assembly (2), and the punch (11) is separated from the main mold (21) to prepare for the next molding.

2. The composite die for one-step forming of an aircraft engine clamp ring according to claim 1, characterized in that: The first guide comprises a first sliding block (222) arranged on the first auxiliary mold (22), and the first guide also comprises a first sliding groove (212) arranged on the main mold (21), and the first sliding block (222) cooperates with the first sliding groove (212).

3. The composite die for one-step forming of an aircraft engine clamp ring according to claim 2, characterized in that: The first guide also includes a first guide groove (32) arranged on the mold base (3), and the first guide also includes a first slide column (223) arranged on the first auxiliary mold (22), the first slide column (223) cooperates with the first guide groove (32), and the first guide groove (32) drives the first auxiliary mold (22) to move horizontally relative to the main mold (21) through the first slide column (223).

4. The composite die for one-step forming of an aircraft engine clamp ring according to claim 3, characterized in that: The cross-sectional shape of the first sliding column (223) is circular, the first guiding groove (32) is in the shape of an elongated strip, and the first guiding groove (32) is arranged obliquely.

5. The composite die for one-step forming of an aircraft engine clamp ring according to claim 1, characterized in that: The second guide comprises a second sliding block arranged on the second auxiliary mold (23), and the second guide also comprises a second sliding groove (213) arranged on the main mold (21), and the second sliding block cooperates with the second sliding groove (213).

6. The composite die for one-step forming of an aircraft engine clamp ring according to claim 5, characterized in that: The second guide also includes a second guide groove (33) arranged on the mold base (3), and the second guide also includes a second slide column (232) arranged on the second sub-mold (23), the second slide column (232) cooperates with the second guide groove (33), and the second guide groove (33) drives the second sub-mold (23) to move horizontally relative to the main mold (21) through the second slide column (232).

7. The composite die for one-step forming of an aircraft engine clamp ring according to claim 3, characterized in that: The cross-sectional shape of the second sliding column (232) is circular, the second guide groove (33) is in the shape of an elongated strip, and the second guide groove (33) is arranged obliquely.

8. The composite die for one-step forming of an aircraft engine clamp ring according to claim 1, characterized in that: The guide comprises a guide column (34) arranged on the mold base (3), and the main mold (21) is provided with a guide hole matched with the guide column (34), and the guide hole passes through the main mold (21).

9. The composite die for one-step forming of an aircraft engine clamp ring according to claim 8, characterized in that: The cross-sectional shape of the guide column (34) is polygonal, and the guide column (34) and the mold base (3) are an integrated structure.

10. The composite die for one-step forming of an aircraft engine clamp ring according to claim 1, characterized in that: The elastic member (31) is a spring, one end of the spring is fixed to the main mold (21), and the other end of the elastic member (31) is fixed to the mold base (3).

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