Rivet pressing device with pre-riveting function
By designing a pre-riveting press-fit device, the riveting problem at the connection end of aviation hydraulic and fuel lines was solved, achieving stable rivet quality and improved structural risk resistance, while meeting the performance indicators of conductivity and self-locking.
Patent Information
- Application Number
- CN202423221279.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The quick-release flexible joints used in existing aviation hydraulic and fuel pipeline connections are difficult to position and clamp during the riveting process, resulting in unstable rivet quality and plastic deformation of sheet metal parts, thus reducing the structure's ability to withstand risks.
Design a pre-riveting device, including a positioning clamping component and a riveting component. Through the positioning pre-riveting structure and the pre-riveting process, the stable forming of the rivet is achieved. The positioning clamping component and the riveting component are coaxially arranged, and the riveting accuracy and quality are ensured by the fixation of the guide shaft and the nut.
It improves riveting accuracy and efficiency, ensures stable rivet forming quality, avoids rivet loosening and plastic deformation of sheet metal parts, and meets the performance requirements of conductivity and self-locking.
Smart Images
Figure CN223642715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pre-riveting device, specifically a pre-riveting device, in the field of riveting technology. Background Technology
[0002] Quick-release flexible couplings are typically used to secure aviation hydraulic and fuel lines, ensuring their stability and safety. The conductivity and self-locking properties of these quick-release flexible couplings in aviation pipelines are achieved through overlapping tabs and spring plates on the retaining rings. Because the surfaces of the two symmetrical retaining rings are arc-shaped, positioning and clamping them is difficult. Often, during single-stage riveting, the overlapping tabs and spring plates are prone to inconsistent rivet quality and plastic deformation of the sheet metal, leading to a reduction in the structure's resilience.
[0003] In view of the problems existing in the prior art, it is necessary to research and design a new type of pre-riveting device to overcome the problems existing in the prior art. Summary of the Invention
[0004] The existing technology addresses the technical problems of unstable rivet quality and plastic deformation of sheet metal parts during single-stage riveting, which reduces the structural resilience. This invention provides a pre-riveting device. The present invention solves the problem of single-stage riveting by setting a positioning pre-riveting structure and process. It is simple to operate, provides stable and reliable quality, high riveting efficiency, and meets the performance indicators of conductivity and self-locking of quick-release flexible joints.
[0005] The technical means adopted in this utility model are as follows:
[0006] A pre-riveting device includes: an assembly frame body, a positioning clamping assembly, and a riveting assembly;
[0007] Furthermore, the positioning and clamping assembly is installed in the lower part of the assembly frame body; the positioning and clamping device is mainly used to position and clamp the retaining ring and the sheet metal parts, thereby achieving a reliable connection after riveting.
[0008] Furthermore, the riveting assembly is installed in the upper part of the assembly frame body, located above the positioning and clamping assembly; the press-riveting body is mainly used to connect with the piston oil pump, and realize the press-riveting process through the piston movement.
[0009] Furthermore, the riveting assembly and the positioning clamping assembly are arranged coaxially;
[0010] Furthermore, the upper end of the riveting assembly is connected to the oil pump piston, and the riveting process is realized through the movement of the piston.
[0011] Furthermore, the main body of the assembly frame includes: an assembly base, a nut, a guide shaft, and a base;
[0012] Furthermore, the upper part of the mounting base is machined into a cylindrical structure for fixing the oil pump. The internal thread of the cylindrical structure is machined for connection with the oil pump end, and a round nut is used for pre-tightening and anti-loosening of the threaded installation. The lower part is a plate-shaped structure for assembling the riveting assembly and the guide shaft. The center of the plate-shaped structure is machined with a through hole for assembling the riveting assembly, and the outer side is machined with mounting holes for assembling the guide shaft.
[0013] Furthermore, the upper center of the base is machined with a mounting groove for assembling the positioning and clamping components;
[0014] Furthermore, the mounting bracket is assembled onto the base via three sets of guide shafts and nuts;
[0015] Furthermore, two sets of guide shafts and nuts are symmetrically mounted on both sides of the mounting base and the base;
[0016] Furthermore, a set of guide shafts and nuts are installed in the middle of the rear of the mounting base and the base.
[0017] Furthermore, the riveting assembly includes: a connecting shaft, a hexagonal socket head cap screw, a spring sleeve, a cylindrical spiral return spring, a guide sleeve positioning riveting head, and a forming riveting head;
[0018] Furthermore, the connecting shaft is inserted from top to bottom into the through hole in the center of the mounting base;
[0019] Furthermore, the bottom end of the connecting shaft is fitted with a positioning riveting head or a forming riveting head via a thread;
[0020] Furthermore, the spring sleeve is mounted on the lower part of the connecting shaft by a hexagonal socket set screw, and a cylindrical helical return spring and a guide sleeve are assembled inside the spring sleeve;
[0021] Furthermore, the spring jacket, cylindrical helical return spring, and guide sleeve are fitted onto the outside of the positioning riveting head or the forming riveting head;
[0022] Furthermore, the cylindrical helical return spring is located between the bottom end of the connecting shaft and the guide sleeve; the cylindrical helical return spring is used for riveting compression and springback reset; the guide sleeve is used to ensure the alignment requirements between the riveting head and the rivet.
[0023] Furthermore, an adjusting shim is installed between the connecting shaft and the mounting base to eliminate the accumulation of errors in the assembly and machining of the device.
[0024] Furthermore, the positioning riveting head and the forming riveting head are interchangeable parts;
[0025] Furthermore, the positioning and pressing head is used in the pre-riveting process;
[0026] Furthermore, the forming press head is used for the secondary riveting process after pre-riveting; because the deformation of rivets formed in a single riveting operation is large, the rivet forming quality is poor. Therefore, compared with single riveting, riveting with pre-riveting function can effectively avoid problems such as rivet loosening, rivet jamming, uneven rivet surface, and plastic deformation of sheet metal parts that may occur during riveting.
[0027] Furthermore, the positioning and clamping assembly includes: a top rivet head, bolt A, an upper limit block, a support block, bolt B, and a lower limit block;
[0028] Furthermore, the support block is an inverted T-shaped cylindrical structure, installed in the mounting groove at the center of the base;
[0029] Furthermore, the lower limit block is assembled to the lower side wall of the support block by bolt B;
[0030] Furthermore, the upper limit block is assembled to the upper side wall of the support block opposite to the lower limit block by bolt A; the upper limit block and the lower limit block are used not only to position the retaining ring but also to fix the retaining ring of the quick-release flexible joint to rotate in the X, Y, and Z axis directions and move in the X and Y axis directions.
[0031] Furthermore, a top rivet head is fitted into the groove at the center of the top of the support block to position and support the rivet head.
[0032] Furthermore, a polyurethane gasket is provided at the top of the support block to prevent scratches on the inner surface of the retaining ring caused by rigid contact between the support block and the retaining ring of the quick-release flexible joint during riveting.
[0033] The working process of this utility model is as follows:
[0034] The hydraulic pump piston pushes the connecting shaft to drive the positioning riveting head or the forming riveting head to complete the pre-riveting or forming riveting of the workpiece. After the riveting is completed, the spring sleeve and the cylindrical spiral return spring work together to realize the reset of the positioning riveting head or the forming riveting head.
[0035] Compared with the prior art, the present invention has the following advantages:
[0036] 1. The pre-riveting device provided by this utility model consists of two parts: a pre-riveting body and a positioning clamping device. These are respectively disposed between the assembly base and the base, and fixed by a guide shaft to ensure that the pre-riveting body and the positioning clamping device do not move during riveting. Furthermore, the fixing devices of the assembly base and the base are coaxially mounted, achieving precise positioning of the pre-riveting head, retaining ring, sheet metal parts, and top riveting head, while improving riveting accuracy and quality.
[0037] 2. The riveting device with pre-riveting provided by this utility model has a cylindrical spiral return spring installed inside the riveting body. After the hydraulic pump is depressurized, the riveting body can be automatically reset, which improves the riveting efficiency.
[0038] 3. The pre-riveting device provided by this utility model has a positioning riveting head and a forming riveting head connected by threads within the riveting body. The positioning riveting head is mainly used for pre-riveting and forming, applying a small pressure to the rivet to produce a small deformation after pre-riveting, thereby positioning the rivet, sheet metal part, or retaining ring. After pre-riveting, the forming riveting head is replaced for rivet forming and riveting, making it easier for the rivet to meet the deformation requirements after forming, resulting in consistent forming effect and more stable quality for all rivets.
[0039] 4. The pre-riveting device provided by this utility model has upper and lower limit blocks set inside the positioning and clamping device, respectively fixing both ends of the retaining ring. The material used is high-strength polytetrafluoroethylene (PTFE), ensuring reliable positioning and clamping of the retaining ring while preventing scratches during riveting. Because the surface of the retaining ring is arc-shaped, traditional manual riveting requires additional personnel to hold the surface, resulting in high labor intensity, high labor costs, and low riveting accuracy. Using the upper and lower limit block positioning and clamping device can improve product riveting efficiency and increase riveting stability.
[0040] In summary, the technical solution of this utility model solves the problem that the rivet quality is unstable and the sheet metal parts are plastically deformed during single riveting of the overlapping pieces and spring pieces in the prior art, which leads to a reduction in the structural risk resistance. Attached Figure Description
[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0042] Figure 1 This is a perspective view of the present utility model;
[0043] Figure 2 This is a schematic diagram of the structure of this utility model;
[0044] Figure 3 This is a schematic diagram of the forming and riveting head structure of this utility model.
[0045] In the diagram: 1. Round nut; 2. Assembly seat; 3. Connecting shaft; 4. Adjusting pad; 5. Nut; 6. Guide shaft; 7. Socket head set screw; 8. Spring sleeve; 9. Cylindrical spiral return spring; 10. Guide sleeve; 11. Positioning and riveting head; 12. Top riveting head; 13. Bolt A; 14. Upper limit block; 15. Support block; 16. Bolt B; 17. Lower limit block; 18. Base; 19. Forming and riveting head; 20. Polyurethane gasket; 21. Positioning and clamping assembly; 22. Riveting assembly. Detailed Implementation
[0046] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0050] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0051] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0053] As shown in the figure, this utility model provides a pre-riveting press-fit device including: an assembly frame body, a positioning clamping component 21, and a riveting component 22; the positioning clamping component 21 is installed in the lower part of the assembly frame body; the riveting component 22 is installed in the upper part of the assembly frame body, located above the positioning clamping component 21; the riveting component 22 and the positioning clamping component 21 are coaxially arranged; the upper end of the riveting component 22 is connected to the oil pump piston, and the press-fitting process is realized by the piston movement.
[0054] The main body of the assembly frame includes: an assembly base 2, a nut 5, a guide shaft 6, and a base 18. The upper part of the assembly base 2 is machined into a cylindrical structure for fixing the oil pump. The internal thread of the cylindrical structure is machined for connection with the oil pump end, and the thread is pre-tightened and prevented from loosening by a round nut 1. The lower part is a plate-shaped structure for assembling the riveting assembly 22 and the guide shaft 6. The center of the plate-shaped structure is machined with a through hole for assembling the riveting assembly 22, and the outer side is machined with a mounting hole for assembling the guide shaft 6. The upper center of the base 18 is machined with a mounting groove for assembling the positioning and clamping assembly 21. The assembly base 2 is assembled onto the base 18 by three sets of guide shafts 6 and nuts 5. Two sets of guide shafts 6 and nuts 5 are symmetrically mounted on both sides of the assembly base 2 and the base 18. One set of guide shafts 6 and nuts 5 is mounted in the middle of the rear of the assembly base 2 and the base 18.
[0055] The riveting assembly 22 includes: a connecting shaft 3, a hexagonal socket head cap screw 7, a spring sleeve 8, a cylindrical spiral return spring 9, a guide sleeve 10, a positioning riveting head 11, and a forming riveting head 19. The connecting shaft 3 is inserted into the through hole at the center of the mounting base 2 from top to bottom. The bottom end of the connecting shaft 3 is threaded with either the positioning riveting head 11 or the forming riveting head 19. The spring sleeve 8 is mounted on the lower part of the connecting shaft 3 by the hexagonal socket head cap screw 7. The cylindrical spiral return spring 9 and the guide sleeve 10 are installed inside the spring sleeve 8. The spring sleeve 8, the cylindrical spiral return spring 9, and the guide sleeve 10 are fitted onto the outside of the positioning riveting head 11 or the forming riveting head 19. The cylindrical spiral return spring 9 is located between the bottom end of the connecting shaft 3 and the guide sleeve 10. The cylindrical spiral return spring 9 is used for riveting compression and springback. The guide sleeve 10 is used to ensure the alignment requirements between the riveting head and the rivet.
[0056] An adjusting shim 4 is installed between the connecting shaft 3 and the mounting base 2 to eliminate the accumulation of errors in the assembly and processing of the device.
[0057] The positioning riveting head 11 and the forming riveting head 19 are interchangeable parts; the positioning riveting head 11 is used for the pre-riveting process; the forming riveting head 19 is used for the secondary riveting forming process after pre-riveting.
[0058] The positioning and clamping assembly 21 includes: a top rivet head 12, bolt A13, an upper limit block 14, a support block 15, bolt B16, and a lower limit block 17; the support block 15 is an inverted T-shaped cylindrical structure, installed in the mounting groove at the center of the base 18; the lower limit block 17 is assembled to the lower side wall of the support block 15 by bolt B16; the upper limit block 14 is assembled to the upper side wall of the support block 15 opposite to the lower limit block 17 by bolt A13; the upper limit block 14 and the lower limit block 17 are used not only to position the retaining ring but also to fix the retaining ring of the quick-release flexible joint in the X, Y, and Z axis directions for rotation and movement in the X and Y axis directions; the top rivet head 12 is installed in the groove at the center of the top of the support block 15 to position and support the rivet head.
[0059] The top of the support block 15 is also provided with a polyurethane gasket 20 to prevent the inner surface of the retaining ring from being scratched due to rigid contact between the support block and the retaining ring of the quick-release flexible joint during riveting.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A pre-riveting device, characterized in that: The pre-riveting device includes: an assembly frame body, a positioning and clamping assembly (21), and a riveting assembly (22); The positioning and clamping assembly (21) is installed in the lower part of the assembly frame body; The riveting assembly (22) is installed in the upper part of the assembly frame body, and is located above the positioning and clamping assembly (21); The riveting assembly (22) and the positioning clamping assembly (21) are coaxially arranged; The upper end of the riveting assembly (22) is connected to the oil pump piston, and the riveting process is realized by the piston movement.
2. The pre-riveting device according to claim 1, characterized in that: The main body of the assembly frame includes: an assembly base (2), a nut (5), a guide shaft (6), and a base (18); The upper part of the mounting base (2) is machined into a cylindrical structure for fixing the oil pump. The internal thread of the cylindrical structure is machined for connecting with the oil pump end and is pre-tightened and prevented from loosening by a round nut (1). The lower part is a plate structure for assembling the riveting assembly (22) and the guide shaft (6). The center of the plate structure is machined with a through hole for assembling the riveting assembly (22), and the outer side is machined with a mounting hole for assembling the guide shaft (6). The upper center of the base (18) is machined with a mounting groove for assembling the positioning clamping assembly (21); The mounting base (2) is assembled onto the base (18) via three sets of guide shafts (6) and nuts (5); The two sets of guide shafts (6) and nuts (5) are symmetrically mounted on both sides of the mounting base (2) and the base (18); The guide shaft (6) and nut (5) are mounted in the middle of the rear of the mounting base (2) and the base (18).
3. The pre-riveting device according to claim 1, characterized in that: The riveting assembly (22) includes: a connecting shaft (3), a hexagonal cylindrical end set screw (7), a spring sleeve (8), a cylindrical spiral return spring (9), a guide sleeve (10), a positioning riveting head (11), and a forming riveting head (19); The connecting shaft (3) is inserted from top to bottom into the through hole in the center of the mounting base (2); The bottom end of the connecting shaft (3) is fitted with a positioning riveting head (11) or a forming riveting head (19) by thread assembly; The spring sleeve (8) is mounted on the lower part of the connecting shaft (3) by a hexagonal cylindrical end set screw (7). The inside of the spring sleeve (8) is equipped with a cylindrical helical return spring (9) and a guide sleeve (10). The spring sleeve (8), cylindrical helical return spring (9) and guide sleeve (10) are fitted onto the outside of the positioning riveting head (11) or the forming riveting head (19); The cylindrical helical return spring (9) is located between the bottom end of the connecting shaft (3) and the guide sleeve (10); the cylindrical helical return spring (9) is used for riveting compression and springback reset; the guide sleeve (10) is used to ensure the alignment requirements between the riveting head and the rivet.
4. The pre-riveting device according to claim 3, characterized in that: An adjusting pad (4) is fitted between the connecting shaft (3) and the mounting base (2) to eliminate the accumulation of errors in the assembly and processing of the device.
5. The pre-riveting device according to claim 3, characterized in that: The positioning riveting head (11) and the forming riveting head (19) are interchangeable parts; The positioning and riveting head (11) is used for the pre-riveting process; The forming press head (19) is used for the secondary riveting forming process after pre-riveting.
6. The pre-riveting device according to claim 1, characterized in that: The positioning and clamping assembly (21) includes: a top rivet head (12), bolt A (13), an upper limit block (14), a support block (15), bolt B (16), and a lower limit block (17); The support block (15) is an inverted T-shaped cylindrical structure, which is installed in the mounting groove in the center of the base (18); The lower limit block (17) is assembled to the lower side wall of the support block (15) by bolt B (16); The upper limit block (14) is assembled on the upper side wall of the support block (15) opposite to the lower limit block (17) by bolt A (13); the upper limit block (14) and the lower limit block (17) are used not only to position the retaining ring but also to fix the retaining ring of the quick-release flexible joint to rotate in the X, Y, and Z axis directions and move in the X and Y axis directions. The top rivet head (12) is fitted in the groove at the center of the top of the support block (15) to position and support the rivet head.
7. The pre-riveting device according to claim 6, characterized in that: The top of the support block (15) is also provided with a polyurethane gasket (20) to prevent the support block from being in rigid contact with the retaining ring of the quick-release flexible joint during riveting, which would cause scratches on the inner surface of the retaining ring.