Riveting process for complex air door frame type parts of commercial aircraft APU system

Abstract

The invention relates to a riveting process for complex air door frame parts of an APU system of a commercial aircraft. The riveting process comprises the following steps that S1, a riveting tool is provided; s2, providing a supporting plate and a rivet; s3, a rivet is placed in the rivet hole, the supporting plate is placed on a to-be-riveted part, the rivet penetrates through a connecting hole of the part, the head of the fixing base extends into the to-be-riveted part from the bottom face, the rivet is placed between the fixed pressing rivet and the movable pressing rivet, the end face of the rivet is flatly attached to the fixed pressing rivet and the movable pressing rivet, and then the rivet is riveted. The movable support arm is controlled to be close to the fixed support arm in the clockwise direction, and the movable pressing rivet gradually stretches out to press the rivet till the shrinkage length of the tail of the rivet and the diameter of the pressing rivet circular truncated cone reach set values; and S4, the two rivets are sequentially pressed and riveted in place, and the riveting tool is rotated to be taken out of the part. The process has universality, and the riveting quality can be improved, so that the qualified rate and the quality stability of part riveting are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of machining, and discloses a riveting process for a complex air door frame part of a commercial airplane APU system. BACKGROUND

[0002] Simple riveting of small parts with simple structures is currently operated on fixed stamping machines, and special riveting tools need to be designed, the quality is unstable, the parts are greatly deformed, and the tools are severely worn. Riveting tools, process methods, etc. for riveting of parts with special structures are still in the exploratory stage, and the actual riveting effect is not ideal. SUMMARY

[0003] The application aims to overcome the deficiencies in the prior art, provide a riveting process for a complex air door frame part of a commercial airplane APU system, and improve the riveting quality, thereby improving the qualified rate and quality stability of part riveting.

[0004] The technical scheme adopted by the application is as follows: A riveting process for a complex air door frame part of a commercial airplane APU system, comprising the following steps: Step S1. Provide a riveting tool, which comprises a fixed branch, a fixed seat head is arranged on the outer periphery of the fixed branch, a fixed seat tail is arranged on the top of the side of the fixed seat head away from the fixed branch, a movable branch is arranged on the bottom of the other side of the fixed seat head away from the fixed branch, one end of the fixed seat tail extends above the fixed branch, a fixed rivet is arranged on the end of the fixed seat tail towards the fixed branch, a movable rivet is arranged on the fixed branch corresponding to the fixed rivet, and the movable rivet can be extended and retracted in the length direction of the fixed branch; Step S2. Provide a support plate and rivets, and rivet holes are arranged on both sides of the support plate; Step S3. Place the rivets in the rivet holes, place the support plate on the part to be riveted, pass the rivets through the connecting holes of the part, extend the fixed seat head from the bottom surface into the part to be riveted, place the rivets between the fixed rivet and the movable rivet, respectively flatten the end surface of the rivet with the fixed rivet and the movable rivet, control the movable branch to approach the fixed branch in the clockwise direction, gradually extend the movable rivet to press the rivet, until the contraction length of the rivet tail and the diameter of the riveting round table reach the set value, and control the rivet to be not riveted in place; Step S4. Rivet the two rivets in place in turn, and rotate the riveting tool to take it out of the part.

[0005] Preferably, in the riveting process of the complex damper frame-like parts of the commercial aircraft APU system, the shape of the tail of the fixed seat in step S1 is arc-shaped, and a telescopic cavity is provided in the side of the fixed support arm near the fixed rivet, and the movable rivet extends and retracts in the telescopic cavity of the fixed support arm.

[0006] Preferably, in the riveting process of the complex damper frame parts of the commercial aircraft APU system, a center hole is provided in the middle of the tray in step S2.

[0007] Preferably, in the riveting process of the complex damper frame-like parts of the commercial aircraft APU system, the rivet in step S2 includes a connecting section, and a rivet cap is provided on the top of the connecting section.

[0008] Preferably, the riveting process for complex damper frame-like parts of the commercial aircraft APU system includes the following steps in step S3: Place a rivet in the rivet hole and place the support plate on the part to be riveted. Pass the rivet through the connecting hole of the part. Extend the head of the fixing seat into the part to be riveted from the bottom. Place the rivet between the fixed pressure rivet and the movable pressure rivet. Flatten the end face of the rivet head with the movable pressure rivet and flatten the end face of the connecting section of the rivet with the fixed pressure rivet. Control the movable support arm to move closer to the fixed support arm in a clockwise direction. The movable pressure rivet gradually extends and presses the rivet until the retracted length of the rivet tail and the diameter of the pressing frustum reach the set value. Control the rivet not to press into place. Place another rivet in the rivet hole and repeat the above steps.

[0009] Preferably, the riveting process for complex damper frame-like parts of the commercial aircraft APU system includes the following steps in step S3: Place two rivets in the rivet holes and place the support plate on the part to be riveted. Pass the rivets through the connecting holes of the part. Extend the head of the fixing seat into the part to be riveted from the bottom. Place the rivet between the fixed pressing rivet and the movable pressing rivet. Flatten the end face of the rivet head with the fixed pressing rivet and flatten the end face of the connecting section of the rivet with the movable pressing rivet. Control the movable support arm to move closer to the fixed support arm in a clockwise direction. The movable pressing rivet gradually extends and presses the rivet until the contracted length of the rivet tail and the diameter of the pressing frustum reach the set value. Control both rivets to not be pressed into place.

[0010] Preferably, the riveting process for complex damper frame-like parts of the commercial aircraft APU system includes the following steps in step S3: Place two rivets in the rivet holes and place the support plate on the part to be riveted. Pass the rivets through the connecting holes of the part. Extend the head of the fixing seat into the part to be riveted from the bottom. Place the rivet between the fixed pressing rivet and the movable pressing rivet. Flatten the end face of the rivet head with the movable pressing rivet and flatten the end face of the connecting section of the rivet with the fixed pressing rivet. Control the movable support arm to move closer to the fixed support arm in a clockwise direction. The movable pressing rivet gradually extends and presses the rivet until the contracted length of the rivet tail and the diameter of the pressing frustum reach the set value. Control both rivets to not be pressed into place.

[0011] Preferably, in the riveting process of the complex damper frame-like parts of the commercial aircraft APU system, in step S4, the end of the connecting section of the rivet away from the rivet head forms a pressing frustum.

[0012] The present invention has the following advantages: The riveting process for complex damper frame parts of the commercial aircraft APU system of the present invention is universal, can improve riveting quality, thereby improving the pass rate and quality stability of part riveting, and can be adapted to the riveting of various irregular structural parts. It can also be extended to assembly and other processes that are similar to riveting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the riveting tool of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the pallet and rivet of the present invention.

[0015] Figure 3 This is a schematic diagram of the riveting tool of the present invention for riveting rivets.

[0016] Figure 4 This is a schematic diagram of the structure of the complex damper frame-like parts of the C919 commercial aircraft APU system to be riveted, as shown in Embodiments 1 and 2 of the present invention.

[0017] Figure 5 for Figure 4 AA sectional view.

[0018] Figure 6 This is a schematic diagram of the structure of the complex damper frame-like parts of the C919 commercial aircraft APU system to be riveted, according to Embodiment 3 of the present invention.

[0019] Figure 7 This is a schematic diagram of the structure of the complex damper frame-like parts of the C919 commercial aircraft APU system to be riveted, according to Embodiment 4 of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Unless otherwise stated, the terminology used herein should be understood in accordance with the conventional usage of those skilled in the art.

[0021] Example 1 A riveting process for complex damper frame parts in a commercial aircraft APU system, characterized by the following steps: Step S1. As Figure 1 A riveting tool 1 is provided, the riveting tool 1 includes a fixed support arm 18, a fixed seat head 11 is provided on the outer periphery of the fixed support arm 18, an arc-shaped fixed seat tail 12 is provided on the top of the fixed seat head 11 on the side away from the fixed support arm 18, a movable support arm 15 is provided on the bottom of the other side of the fixed seat head 11 away from the fixed support arm 18, one end of the fixed seat tail 12 extends to the top of the fixed support arm 18, a fixed pressure rivet 16 is provided on the inner side of the end of the fixed seat tail 12 facing the fixed support arm 18, a movable pressure rivet 17 is provided on the fixed support arm 18 at the position corresponding to the fixed pressure rivet 16, the movable pressure rivet 17 extends and retracts in the length direction of the fixed support arm 18 by means of the movable pressure rivet 17, a telescopic cavity 19 is provided in the fixed support arm 18 on the side near the fixed pressure rivet 16, the movable pressure rivet 17 extends and retracts in the telescopic cavity 19 of the fixed support arm 1; Step S2. Figure 2 and Figure 3 The system provides a support plate 2 and a rivet 3. The support plate 2 has rivet holes 21 on both sides and a center hole 22 in the middle. The rivet 3 includes a connecting section 31, and a rivet head 32 is provided on the top of the connecting section 31. Step S3. (As follows) Figure 4 and Figure 5 N1-N4 are located inside the parts, which are difficult-to-machine locations for riveting. For N1-N4: Place a rivet 3 in the rivet hole 21 and place the support plate 2 on the parts to be riveted. Pass the rivet 3 through the connecting hole of the parts. Extend the head 11 of the fixing seat into the parts to be riveted from the bottom. Place the rivet 3 between the fixed pressing rivet 16 and the movable pressing rivet 17. Flatten the end face of the rivet head 32 of the rivet with the movable pressing rivet 17. Flatten the end face of the connecting section 31 of the rivet with the fixed pressing rivet 16. Control the movable support arm 15 to move closer to the fixed support arm 18 in a clockwise direction. The movable pressing rivet 17 gradually extends to press the rivet until the contraction length of the tail of the rivet 3 and the diameter of the pressing frustum reach the set value. Control the rivet not to press into place. Place another rivet 3 in the rivet hole 31 and repeat the above steps. Step S4. Press the two rivets into place in sequence. The end of the connecting section 31 of the rivet 3 away from the rivet head 32 forms a pressing frustum 33. Rotate the riveting tool 1 to remove it from the part.

[0022] Example 2 A riveting process for complex damper frame parts in a commercial aircraft APU system, characterized by the following steps: Step S1. Provide a riveting tool 1, which includes a fixed support arm 18. A fixed seat head 11 is provided on the outer periphery of the fixed support arm 18. An arc-shaped fixed seat tail 12 is provided on the top of the fixed seat head 11 on the side away from the fixed support arm 18. A movable support arm 15 is provided on the bottom of the other side of the fixed seat head 11 away from the fixed support arm 18. One end of the fixed seat tail 12 extends above the fixed support arm 18. A fixed rivet 16 is provided on the inner side of the end of the fixed seat tail 12 facing the fixed support arm 18. A movable rivet 17 is provided on the fixed support arm 18 at the position corresponding to the fixed rivet 16. The movable rivet 17 extends and retracts in the length direction of the fixed support arm 18. A telescopic cavity 19 is provided in the fixed support arm 18 on the side near the fixed rivet 16. The movable rivet 17 extends and retracts in the telescopic cavity 19 of the fixed support arm 1. Step S2. Provide a support plate 2 and a rivet 3. The support plate 2 has rivet holes 21 on both sides and a center hole 22 in the middle. The rivet 3 includes a connecting section 31, and a rivet head 32 is provided on the top of the connecting section 31. Step S3. (As follows) Figure 4 and Figure 5 Y1-Y12 are located on the thin plate on the right side of the part. Place two rivets 3 in the rivet holes 21 and place the support plate 2 on the part to be riveted. Pass the rivets 3 through the connecting holes of the part. Extend the head 11 of the fixing seat into the part to be riveted from the bottom. Place the rivets 3 between the fixed pressing rivet 16 and the movable pressing rivet 17. Flatten the end face of the rivet head 32 of the rivet with the fixed pressing rivet 16. Flatten the end face of the connecting section 31 of the rivet with the movable pressing rivet 17. Control the movable support arm 15 to move closer to the fixed support arm 18 in a clockwise direction. The movable pressing rivet 17 gradually extends to press the rivet until the contraction length of the tail of the rivet 3 and the diameter of the pressing truncated cone reach the set value. Control both rivets not to be pressed into place. Step S4. Press the two rivets into place in sequence. The end of the connecting section 31 of the rivet 3 away from the rivet head 32 forms a pressing frustum 33. Rotate the riveting tool 1 to remove it from the part.

[0023] Example 3 A riveting process for complex damper frame parts in a commercial aircraft APU system, characterized by the following steps: Step S1. Provide a riveting tool 1, which includes a fixed support arm 18. A fixed seat head 11 is provided on the outer periphery of the fixed support arm 18. An arc-shaped fixed seat tail 12 is provided on the top of the fixed seat head 11 on the side away from the fixed support arm 18. A movable support arm 15 is provided on the bottom of the other side of the fixed seat head 11 away from the fixed support arm 18. One end of the fixed seat tail 12 extends above the fixed support arm 18. A fixed rivet 16 is provided on the inner side of the end of the fixed seat tail 12 facing the fixed support arm 18. A movable rivet 17 is provided on the fixed support arm 18 at the position corresponding to the fixed rivet 16. The movable rivet 17 extends and retracts in the length direction of the fixed support arm 18. A telescopic cavity 19 is provided in the fixed support arm 18 on the side near the fixed rivet 16. The movable rivet 17 extends and retracts in the telescopic cavity 19 of the fixed support arm 1. Step S2. Provide a support plate 2 and a rivet 3. The support plate 2 has rivet holes 21 on both sides and a center hole 22 in the middle. The rivet 3 includes a connecting section 31, and a rivet head 32 is provided on the top of the connecting section 31. Step S3. Figure 6 X1-X7 are located on the thin plate below the part. Place two rivets 3 in the rivet holes 21 and place the support plate 2 on the part to be riveted. Pass the rivets 3 through the connecting holes of the part. Extend the head 11 of the fixing seat into the part to be riveted from the bottom. Place the rivets 3 between the fixed pressing rivet 16 and the movable pressing rivet 17. Flatten the end face of the rivet head 32 of the rivet with the movable pressing rivet 17. Flatten the end face of the connecting section 31 of the rivet with the fixed pressing rivet 16. Control the movable support arm 15 to move closer to the fixed support arm 18 in a clockwise direction. The movable pressing rivet 17 gradually extends to press the rivet until the contraction length of the tail of the rivet 3 and the diameter of the pressing truncated cone reach the set value. Control both rivets not to be pressed into place.

[0024] Step S4. Press the two rivets into place in sequence. The end of the connecting section 31 of the rivet 3 away from the rivet head 32 forms a pressing frustum 33. Rotate the riveting tool 1 to remove it from the part.

[0025] Example 4 A riveting process for complex damper frame parts in a commercial aircraft APU system, characterized by the following steps: Step S1. Provide a riveting tool 1, which includes a fixed support arm 18. A fixed seat head 11 is provided on the outer periphery of the fixed support arm 18. An arc-shaped fixed seat tail 12 is provided on the top of the fixed seat head 11 on the side away from the fixed support arm 18. A movable support arm 15 is provided on the bottom of the other side of the fixed seat head 11 away from the fixed support arm 18. One end of the fixed seat tail 12 extends above the fixed support arm 18. A fixed rivet 16 is provided on the inner side of the end of the fixed seat tail 12 facing the fixed support arm 18. A movable rivet 17 is provided on the fixed support arm 18 at the position corresponding to the fixed rivet 16. The movable rivet 17 extends and retracts in the length direction of the fixed support arm 18. A telescopic cavity 19 is provided in the fixed support arm 18 on the side near the fixed rivet 16. The movable rivet 17 extends and retracts in the telescopic cavity 19 of the fixed support arm 1. Step S2. Provide a support plate 2 and a rivet 3. The support plate 2 has rivet holes 21 on both sides and a center hole 22 in the middle. The rivet 3 includes a connecting section 31, and a rivet head 32 is provided on the top of the connecting section 31. Step S3. Figure 7 S1-S7 are located on the thin plate above the part, which is a difficult-to-machine position for riveting. C1-C2 are located on the thin plate on the side of the part, which is also a difficult-to-machine position for riveting. Place two rivets 3 in the rivet holes 21 and place the support plate 2 on the part to be riveted. Pass the rivets 3 through the connecting holes of the part. Extend the head 11 of the fixing seat into the part to be riveted from the bottom. Place the rivets 3 between the fixed pressing rivet 16 and the movable pressing rivet 17. Flatten the end face of the rivet head 32 of the rivet with the movable pressing rivet 17. Flatten the end face of the connecting section 31 of the rivet with the fixed pressing rivet 16. Control the movable support arm 15 to move closer to the fixed support arm 18 in a clockwise direction. The movable pressing rivet 17 gradually extends to press the rivet until the contraction length of the tail of the rivet 3 and the diameter of the pressing truncated cone reach the set value. Control both rivets not to be pressed into place.

[0026] Step S4. Press the two rivets into place in sequence. The end of the connecting section 31 of the rivet 3 away from the rivet head 32 forms a pressing frustum 33. Rotate the riveting tool 1 to remove it from the part.

[0027] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A riveting process for complex damper frame-like parts in a commercial aircraft APU system, characterized in that, Includes the following steps: Step S1. Provide a riveting tool (1), the riveting tool (1) includes a fixed support arm (18), a fixed seat head (11) is provided on the outer periphery of the fixed support arm (18), a fixed seat tail (12) is provided on the top of the fixed seat head (11) away from the fixed support arm (18), a movable support arm (15) is provided on the bottom of the other side of the fixed seat head (11) away from the fixed support arm (18), one end of the fixed seat tail (12) extends to the top of the fixed support arm (18), a fixed pressure rivet (16) is provided on the inner side of the fixed seat tail (12) facing the fixed support arm (18), and a movable pressure rivet (17) is provided on the fixed support arm (18) at the position corresponding to the fixed pressure rivet (16), and the movable pressure rivet (17) extends and retracts in the length direction of the fixed support arm (18); Step S2. Provide a tray (2) and rivets (3), with rivet holes (21) on both sides of the tray (2); Step S3. Place the rivet (3) in the rivet hole (21) and place the support plate (2) on the part to be riveted. Pass the rivet (3) through the connecting hole of the part and extend the head (11) of the fixed seat into the part to be riveted from the bottom. Place the rivet (3) between the fixed press rivet (16) and the movable press rivet (17). Make the end face of the rivet flush with the fixed press rivet (16) and the movable press rivet (17) respectively. Control the movable support arm (15) to move closer to the fixed support arm (18) in a clockwise direction. The movable press rivet (17) gradually extends to press the rivet until the shrinkage length of the tail of the rivet (3) and the diameter of the press truncated cone reach the set value. Control the rivet (3) not to press into place. Step S4. Press the two rivets (3) into place in sequence, and rotate the riveting tool (1) to remove it from the part.

2. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, In step S1, the shape of the tail (12) of the fixed seat is arc-shaped, and a telescopic cavity (19) is provided in the fixed support arm (18) on the side near the fixed rivet (16). The movable rivet (17) extends and retracts in the telescopic cavity (19) of the fixed support arm (18).

3. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, In step S2, a center hole (22) is also provided in the middle of the tray (2).

4. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, In step S2, the rivet (3) includes a connecting section (31), and a rivet cap (32) is provided on the top of the connecting section (31).

5. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, Step S3 specifically includes the following steps: Place a rivet (3) in the rivet hole (21) and place the support plate (2) on the part to be riveted. Pass the rivet (3) through the connecting hole of the part and extend the head (11) of the fixed seat into the part to be riveted from the bottom. Place the rivet (3) between the fixed press rivet (16) and the movable press rivet (17). Flatten the end face of the rivet head (32) of the rivet with the movable press rivet (17). Flatten the end face of the connecting section (31) of the rivet with the fixed press rivet (16). Control the movable support arm (15) to move closer to the fixed support arm (18) in a clockwise direction. The movable press rivet (17) gradually extends to press the rivet until the shrinkage length of the tail of the rivet (3) and the diameter of the press truncated cone reach the set value. Control the rivet not to press into place. Place another rivet (3) in the rivet hole (21) and repeat the above steps.

6. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, Step S3 specifically includes the following steps: Place two rivets (3) in the rivet holes (21) and place the support plate (2) on the part to be riveted. Pass the rivets (3) through the connecting holes of the part and extend the head (11) of the fixed seat into the part to be riveted from the bottom. Place the rivets (3) between the fixed press rivet (16) and the movable press rivet (17). Flatten the end face of the rivet head (32) of the rivet with the fixed press rivet (16) and flatten the end face of the connecting section (31) of the rivet with the movable press rivet (17). Control the movable support arm (15) to move closer to the fixed support arm (18) in a clockwise direction. The movable press rivet (17) gradually extends to press the rivet until the shrinkage length of the tail of the rivet (3) and the diameter of the press truncated cone reach the set value. Control both rivets not to press into place.

7. The riveting process for complex damper frame-like parts of a commercial aircraft APU system as described in claim 1, characterized in that, Step S3 specifically includes the following steps: Place two rivets (3) in the rivet holes (21) and place the support plate (2) on the part to be riveted. Pass the rivets (3) through the connecting holes of the part and extend the head (11) of the fixed seat into the part to be riveted from the bottom. Place the rivets (3) between the fixed press rivet (16) and the movable press rivet (17). Flatten the end face of the rivet head (32) of the rivet with the movable press rivet (17). Flatten the end face of the connecting section (31) of the rivet with the fixed press rivet (16). Control the movable support arm (15) to move closer to the fixed support arm (18) in a clockwise direction. The movable press rivet (17) gradually extends to press the rivet until the shrinkage length of the tail of the rivet (3) and the diameter of the press truncated cone reach the set value. Control both rivets not to press into place.

8. The riveting process for complex damper frame parts of a commercial aircraft APU system as described in claim 1, characterized in that, In step S4, the end of the connecting section (31) of the rivet (3) away from the rivet head (32) forms a pressing truncated cone (33).

Images