CN114508536A - CFRP single-side core-pulling nondestructive riveting fastener and method - Google Patents
CFRP single-side core-pulling nondestructive riveting fastener and method Download PDFInfo
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- CN114508536A CN114508536A CN202210136872.5A CN202210136872A CN114508536A CN 114508536 A CN114508536 A CN 114508536A CN 202210136872 A CN202210136872 A CN 202210136872A CN 114508536 A CN114508536 A CN 114508536A
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- 238000000034 method Methods 0.000 title claims abstract description 25
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- 238000000227 grinding Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 241001079814 Symphyotrichum pilosum Species 0.000 abstract description 8
- 235000004224 Typha angustifolia Nutrition 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 230000003139 buffering effect Effects 0.000 abstract 1
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
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- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000011157 advanced composite material Substances 0.000 description 1
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- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
- B21J15/40—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting for forming rivet heads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
The invention discloses a CFRP single-side core-pulling nondestructive riveting fastener and a method, comprising a shear-resistant riveting fastener and a tensile-resistant riveting fastener; the shear-resistant riveting fastener consists of a perforated rivet and a shear-resistant mandrel, and the tensile-resistant riveting fastener consists of a perforated rivet, a tensile-resistant mandrel and a fastening nut; the rivet with the hole is provided with a central through hole in the middle, an upset head section is arranged above the rivet, a nail rod section is arranged in the middle, the diameter of the upset head section is smaller than that of the nail rod section, a groove is designed between the upset head section and the nail rod section, and a nail head is arranged below the upset head section. According to the rivet pulling method, a buffering constraint area is provided for deformation of the upset head part through the design of the rivet with the hole, which is provided with the groove and the diameter of the rivet rod section is larger than that of the upset head section, so that a large amount of deformation force of the rivet acts in the groove, and damage to a composite material riveting component is avoided; the shear resistance of the composite material riveting component is improved; meanwhile, the tensile core rod is designed by adopting a threaded section and is matched with a fastening nut, so that the tensile falling resistance of the composite material riveting component is improved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a CFRP (carbon fiber reinforced plastics) unilateral core-pulling nondestructive riveting fastener and a method.
Background
The lightweight aircraft is one of important targets of aircraft design at present, advanced composite materials represented by carbon fiber reinforced resin matrix Composites (CFRP) have the advantages of high specific strength, high specific stiffness, capability of designing and integral structure forming and the like, can obviously reduce the weight of an aircraft structure and reduce the manufacturing cost of the structure, and are widely used in the field of aerospace. In the aircraft manufacturing process, a large number of CFRP connecting components exist and are typical integral structural weak links, and the connecting structure optimization design is one of important research contents of the current aircraft manufacturing.
At present, the connecting mode of the CFRP component mainly adopts the cementing, the screw thread connection and the mixed connection. The adhesive joint has high strength and good corrosion resistance, but the adhesive joint has high brittleness, anisotropy and poor impact resistance. The screw joint is the most main connecting method of the existing CFRP component, has the advantages of high reliability, large load transmission, detachability and the like, but has higher cost, is different from several times to more than ten times of riveting under the same condition, and has heavier weight than riveting. The hybrid connection has high strength, can prevent sudden damage and improve safety performance, but the forming process is more complex. Riveting is the most important assembly and connection method of an airplane, has the obvious advantages of low cost, high reliability, simple process and the like, but riveting easily causes damage to CFRP components. Therefore, it has long been avoided by CFRP components. The invention with the patent number of CN202110134494.2 discloses a nondestructive riveting device and a nondestructive riveting method for a CFRP (carbon fiber reinforced plastics) member, and provides a buffer constraint area for deformation of a nail head part by adopting a riveting method of a countersunk washer and a bushing with a countersunk head, so that a large amount of deformation force of a rivet acts in a groove of the countersunk washer, radial expansion of a nail rod in the CFRP member is limited, only small amount of uniform deformation occurs, and further the riveting damage of the CFRP member is avoided. However, the invention is not suitable for single-side riveting and the like, and the application range has certain limitation. The invention with the patent number of CN201510889783.8 discloses a self-plugging rivet for connecting composite materials, which can adjust the range of interlayer thickness, can rivet connected pieces with different thicknesses, can be suitable for interlayer thickness larger than the range of the prior art, but can not solve the problem of riveting damage of the composite materials.
In summary, the present invention is directed to a composite material one-side lossless riveting fastener and a riveting method, which are used for realizing one-side lossless riveting of a CFRP member.
Disclosure of Invention
The present invention is directed to solving the above problems by providing a CFRP single-sided blind nondestructive riveting fastener and method.
The invention realizes the purpose through the following technical scheme:
a CFRP single-side core-pulling nondestructive riveting fastener comprises a rivet with a hole penetrating through a CFRP upper layer plate and a CFRP lower layer plate, wherein a core rod for riveting and fastening is arranged on the rivet with the hole in a penetrating manner; the rivet is characterized in that a through hole penetrates through the center of the rivet with the hole, an upset head section is arranged above the rivet with the hole, a nail rod section is arranged in the middle of the rivet with the hole, the diameter of the upset head section is smaller than that of the nail rod section, a groove is formed between the upset head section and the nail rod section, and a nail head is arranged at the lower end of the nail rod section.
Preferably: the mandrel comprises a shear mandrel or a tensile mandrel.
Preferably: the shear-resistant mandrel comprises an extrusion head, a filling section is arranged at the lower end of the extrusion head, a stretching section is arranged at the lower end of the filling section and penetrates through the outer side of the perforated rivet, a notch is formed between the stretching section and the filling section, and the shear-resistant mandrel and the perforated rivet are combined into a shear-resistant riveting fastener.
Preferably: the tensile mandrel comprises an extrusion head, a filling section is arranged at the lower end of the extrusion head, the lower end of the filling section penetrates through the outer side of the perforated rivet to be provided with a stretching section, a notch is formed between the stretching section and the filling section, the outer diameter of the filling section is located on the upper side of the notch, a threaded section is arranged on the lower side of the perforated rivet, a fastening nut connected with the mandrel is arranged on the lower side of the perforated rivet, and the tensile mandrel is combined with the perforated rivet and the fastening nut to form a tensile riveting fastener.
Preferably: the extrusion head, the filling section, the notch and the stretching section are integrally formed, and the filling section is coaxial with the through hole of the rivet with the hole and is in small interference fit with the through hole.
Preferably: the rivet head of the rivet with the hole comprises a semi-circular head, a flat head or a countersunk head.
A use method of a shear type fastener of a CFRP single-side core-pulling nondestructive riveting fastener comprises the following steps:
step one, the shear-resistant core rod penetrates through a through hole of the rivet with the hole, and a shear-resistant riveting fastener is assembled;
fixing the CFRP upper layer plate and the CFRP lower layer plate, placing a shear-resistant riveting fastener into riveting holes of the CFRP upper layer plate and the CFRP lower layer plate from one side, propping the shear-resistant riveting fastener on the CFRP lower layer plate through a rivet gun, and attaching the head of the rivet with the hole to the surface of the CFRP lower layer plate;
pulling the shear-resistant mandrel through a hand riveter, wherein the upset head section of the perforated rivet is extruded and deformed by the extrusion head to form an upset head, the rivet rod section in the perforated rivet is only slightly deformed due to larger diameter, the shear-resistant mandrel is pulled off at the cut along with the increase of the pulling force on the shear-resistant mandrel, and the single riveting is completed;
and step four, grinding the fracture surface of the notch of the shear-resistant core rod to be flat through a small grinding machine, and ensuring the surface quality of the riveting head.
A use method of a tensile fastener of a CFRP single-side core-pulling lossless riveting fastener comprises the following steps:
step one, the tensile core rod penetrates through the rivet through hole with the hole to be assembled to form a tensile riveting fastener;
fixing the CFRP upper layer plate and the CFRP lower layer plate, placing a riveting body of a tensile riveting fastener into riveting holes of the CFRP upper layer plate and the CFRP lower layer plate from one side, propping the tensile riveting fastener on the CFRP lower layer plate through a rivet gun, and attaching the rivet head of the rivet with the hole to the surface of the CFRP lower layer plate;
pulling the tensile core rod through a rivet gun, wherein the upset head section of the perforated rivet is extruded and deformed by the extrusion head to form an upset head, the rivet rod section in the perforated rivet only slightly deforms due to larger diameter, and the tensile core rod is broken at the cut along with the increase of the tensile force on the tensile core rod;
and step four, the fastening nut is in threaded connection with the threaded section of the tensile core rod, and the fracture surface of the notch of the tensile core rod is ground flat through a small grinding machine, so that the surface quality of a riveting head is guaranteed.
Compared with the prior art, the invention has the following beneficial effects:
the invention is based on a rivet pulling method, and provides a buffer constraint area for deformation of the upset head in the riveting process by inventing the perforated rivet with the upset head section with the diameter smaller than that of the rivet rod section and the groove between the upset head section and the rivet rod section, so that a large amount of deformation force of the rivet acts in the groove, the expansion of the rivet rod in the CFRP riveting component is limited, and the single-side damage-free riveting of the CFRP component is realized; meanwhile, aiming at the conditions of high requirements on shear resistance and light weight, a core rod filling section is left in the rivet and forms small interference fit with the rivet with the hole, so that the shear resistance of the CFRP riveted member is improved; aiming at the condition of high requirement on the pull-off resistance, the fastening nut is connected to the threaded section at the tail end of the mandrel after the tensile mandrel is riveted to form rivet-nut coupling connection, so that the pull-off resistance of the CFRP riveting member is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a shear-type rivet fastener of a CFRP single-sided blind nondestructive rivet fastener of the present invention;
FIG. 2 is a schematic structural view of a tensile-type rivet fastener of the CFRP single-sided loose-core lossless rivet fastener according to the invention;
FIG. 3 is a schematic view of the split structure of FIG. 1;
FIG. 4 is a schematic view of the split structure of FIG. 2;
FIG. 5 is a schematic structural view of a perforated rivet of a CFRP single-sided blind lossless riveting fastener according to the invention;
FIG. 6 is a schematic main sectional view of FIG. 5;
FIG. 7 is a structural schematic diagram of a perforated rivet of the CFRP single-side blind nondestructive riveting fastener of the invention with a flat head as the top;
FIG. 8 is a schematic structural view of a perforated rivet of the CFRP single-side blind nondestructive riveting fastener of the invention with a countersunk head at the top;
FIG. 9 is a schematic view of the overall structure of the shear rivet fastener according to the present invention;
FIG. 10 is a schematic cross-sectional view of FIG. 9;
FIG. 11 is a schematic view of the shear rivet fastener of the present invention after riveting;
FIG. 12 is a schematic cross-sectional view of FIG. 11;
FIG. 13 is a schematic view of the overall construction of the tension-type rivet fastener of the present invention;
FIG. 14 is a schematic cross-sectional view of FIG. 13;
FIG. 15 is a schematic representation of the effect of the tension-type rivet fastener of the present invention after riveting;
fig. 16 is a schematic cross-sectional structure of fig. 15.
The reference numerals are explained below:
1. a rivet with a hole; 2. a core rod; 3. a CFRP upper layer plate; 4. a CFRP lower layer plate; 5. fastening a nut; 11. heading section; 12. a groove; 13. a nail shank section; 14. a nail head; 21. an extrusion head; 22. a filling section; 23. cutting; 24. a stretching section; 25. a threaded segment.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-16, a CFRP single-side blind-core lossless riveting fastener comprises a rivet 1 with a hole, a shear mandrel, a CFRP upper plate 3, a CFRP lower plate 4, a tensile mandrel and a fastening nut 5; the perforated rivet 1, the tensile core rod and the fastening nut 5 form the tensile riveting fastener which is used for meeting the CFRP single-side nondestructive riveting requirement with high tensile performance requirement.
The center of the rivet 1 with the hole is provided with a central through hole, an upset head section 11 is arranged above the rivet 1 with the hole, a screw rod section 13 is arranged in the middle, the diameter of the upset head section 11 is smaller than that of the screw rod section 13, and a groove 12 is arranged between the upset head section 11 and the screw rod section 13; a rivet head 14 is arranged below the rivet 1 with the hole, and the shape of the rivet head 14 comprises a semi-circular head, a flat head and a countersunk head according to the needs of riveting occasions; in the riveting process, the diameter of the upset head section 11 is smaller than that of the rivet rod section 13, and the groove 12 is formed in the middle of the upset head section 11 and the rivet rod section 13, so that a buffer constraint area is provided for upset head deformation in the riveting process, a large amount of deformation force of the rivet acts in the groove, expansion of the rivet rod in the CFRP riveting component is limited, and single-side lossless riveting of the CFRP component is realized. The shear resistant core rod consists of an extrusion head 21, a filling section 22, a notch 23 and a stretching section 24, the shear resistant core rod and the perforated rivet 1 are combined together in a coaxial and small interference fit mode, and the overall shear resistance of the riveting fastener is improved through the interference fit. The tensile mandrel is similar to the shear mandrel in structure, but the filling section 22 is threaded near the notch 23 and consists of an extrusion head 21, the filling section 22, a threaded section 25, the notch 23 and a stretching section 24, and the tensile mandrel and the perforated rivet 1 are coaxially combined in a small interference fit mode. After the tensile core rod extrudes the perforated rivet 1 to be formed, the fastening nut 5 is connected with the tensile core rod threaded section 25 to form rivet-screw coupling connection, and the pulling-out resistance of the CFRP riveting component is improved.
The using method of the shear-type riveting fastener comprises the following steps:
step one, a shear-resistant core rod penetrates through a through hole of a rivet 1 with a hole and is assembled to form a shear-resistant riveting fastener;
fixing the CFRP upper layer plate 3 and the CFRP lower layer plate 4, placing the shear-resistant riveting fastener into riveting holes of the CFRP upper layer plate 3 and the CFRP lower layer plate 4 from one side, propping the shear-resistant riveting fastener on the CFRP lower layer plate 4 through a rivet gun, and attaching the rivet head 14 of the rivet 1 with the hole to the surface of the CFRP lower layer plate 4;
pulling the shear-resistant mandrel through a hand riveter, extruding and deforming the upset head section 11 of the perforated rivet 1 by the extrusion head 21 to form an upset head, wherein the shank section 22 in the perforated rivet 1 is only slightly deformed due to larger diameter, and the shear-resistant mandrel is pulled off at the notch 23 along with the increase of the pulling force on the shear-resistant mandrel, so that single riveting is completed;
and step four, grinding the fracture surface of the notch 23 of the shear-resistant core rod by a small grinding machine to ensure the surface quality of the riveting head.
The use method of the tensile riveting fastener comprises the following steps:
step one, a tensile core rod penetrates through a through hole of a rivet 1 with a hole and is assembled to form a tensile riveting fastener;
fixing the CFRP upper layer plate 3 and the CFRP lower layer plate 4, placing a riveting body of a tensile riveting fastener into riveting holes of the CFRP upper layer plate 3 and the CFRP lower layer plate 4 from one side, propping the tensile riveting fastener on the CFRP lower layer plate 4 through a rivet gun, and attaching a rivet head 14 of a rivet 1 with a hole to the surface of the CFRP lower layer plate 4;
pulling the tensile core rod through a rivet gun, extruding and deforming the upset head section 11 of the perforated rivet 1 by the extrusion head 21 to form an upset head, only slightly deforming the rivet rod section 22 in the perforated rivet 1 due to the larger diameter, and breaking the tensile core rod at the notch 23 along with the increase of the tensile force on the tensile core rod;
and step four, screwing the fastening nut 5 with the threaded section 25 of the tensile core rod, and grinding the fracture surface of the notch 23 of the tensile core rod by using a small grinding machine to ensure the surface quality of the riveted nail head.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. The utility model provides a CFRP unilateral core-pulling nondestructive riveting fastener which characterized in that: the riveting device comprises a perforated rivet (1) penetrating through a CFRP upper layer plate (3) and a CFRP lower layer plate (4), wherein a core rod (2) for riveting and fastening is arranged on the perforated rivet (1) in a penetrating manner; perforated rivet (1) center runs through there is the through-hole, perforated rivet (1) top is upsetting section (11), be in the middle of perforated rivet (1) nail pole section (13), upsetting section (11) diameter is less than nail pole section (13) diameter, upsetting section (11) with be provided with recess (12) between nail pole section (13), nail pole section (13) lower extreme is provided with pin fin (14).
2. The CFRP single-sided loose-core lossless riveting fastener according to claim 1, characterized in that: the mandrel (2) comprises a shear mandrel or a tensile mandrel.
3. The CFRP single-sided loose-core lossless riveting fastener according to claim 2, characterized in that: the shear mandrel comprises an extrusion head (21), a filling section (22) is arranged at the lower end of the extrusion head (21), the lower end of the filling section (22) penetrates through the outer side of the perforated rivet (1) to be provided with a stretching section (24), a notch (23) is formed between the stretching section (24) and the filling section (22), and the shear mandrel and the perforated rivet (1) are combined to form a shear riveting fastener.
4. The CFRP single-sided loose-core lossless riveting fastener according to claim 2, characterized in that: tensile plug includes extrusion head (21), extrusion head (21) lower extreme is provided with filling section (22), filling section (22) lower extreme passes foraminiferous rivet (1) outside is provided with tensile section (24), tensile section (24) with be provided with incision (23) between filling section (22), filling section (22) external diameter is located incision (23) upside is provided with screw thread section (25), foraminiferous rivet (1) downside be provided with fastening nut (5) that plug (2) are connected, tensile plug with foraminiferous rivet (1) fastening nut (5) combination is tensile type riveting fastener.
5. A CFRP single-sided loose-core lossless riveting fastener according to claim 3 or 4, characterized in that: the extrusion head (21), the filling section (22), the notch (23) and the stretching section (24) are integrally formed, and the filling section (22) is in coaxial and small interference fit with a through hole of the rivet with the hole (1).
6. The CFRP single-sided loose-core lossless riveting fastener according to claim 1, characterized in that: the rivet head (14) of the rivet (1) with the hole comprises a semi-circular head, a flat head or a countersunk head.
7. The use method of the CFRP single-sided loose-core lossless riveting fastener according to claim 3, characterized in that: the method comprises the following steps:
step one, the shear-resistant core rod penetrates through a through hole of the rivet (1) with the hole to be assembled to form a shear-resistant riveting fastener;
secondly, fixing the CFRP upper layer plate (3) and the CFRP lower layer plate (4), placing a shear-resistant riveting fastener into riveting holes of the CFRP upper layer plate (3) and the CFRP lower layer plate (4) from one side, propping the shear-resistant riveting fastener on the CFRP lower layer plate (4) through a rivet gun, and attaching the nail head (14) of the rivet (1) with the hole to the surface of the CFRP lower layer plate (4);
pulling the shear-resistant mandrel through a hand riveter, wherein the upsetting head section (11) of the perforated rivet (1) is extruded and deformed by the extrusion head (21) to form an upsetting head, the mandrel section (22) in the perforated rivet (1) is deformed only a little due to larger diameter, the shear-resistant mandrel is pulled apart at the notch (23) along with the increase of the pulling force on the shear-resistant mandrel, and single riveting is completed;
and step four, grinding the fracture surface of the notch (23) of the shear-resistant core rod to be flat through a small grinding machine, and ensuring the surface quality of the riveting head.
8. The use method of the CFRP single-sided loose-core lossless riveting fastener according to claim 4, characterized in that: the method comprises the following steps:
step one, the tensile core rod penetrates through a through hole of the rivet (1) with the hole to be assembled to form a tensile riveting fastener;
step two, fixing the CFRP upper layer plate (3) and the CFRP lower layer plate (4), placing a riveting body of a tensile riveting fastener into riveting holes of the CFRP upper layer plate (3) and the CFRP lower layer plate (4) from one side, propping the tensile riveting fastener on the CFRP lower layer plate (4) through a rivet gun, and attaching the nail head (14) of the rivet (1) with the hole to the surface of the CFRP lower layer plate (4);
pulling the tensile mandrel by a rivet pulling gun, wherein the upset head section (11) of the perforated rivet (1) is extruded and deformed by the extrusion head (21) to form an upset head, the shank section (22) in the perforated rivet (1) is deformed only a little due to larger diameter, and the tensile mandrel is broken at the notch (23) along with the increase of the tensile force on the tensile mandrel;
step four, the fastening nut (5) is in threaded connection with the threaded section (25) of the tensile core rod, and the fracture surface of the notch (23) of the tensile core rod is ground flat through a small grinding machine, so that the surface quality of a riveting head is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210136872.5A CN114508536A (en) | 2022-02-15 | 2022-02-15 | CFRP single-side core-pulling nondestructive riveting fastener and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210136872.5A CN114508536A (en) | 2022-02-15 | 2022-02-15 | CFRP single-side core-pulling nondestructive riveting fastener and method |
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| CN114508536A true CN114508536A (en) | 2022-05-17 |
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| CN202210136872.5A Pending CN114508536A (en) | 2022-02-15 | 2022-02-15 | CFRP single-side core-pulling nondestructive riveting fastener and method |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10306814A (en) * | 1997-04-30 | 1998-11-17 | Ricoh Co Ltd | Blind rivet, mandrel therefor, and blind rivet structure |
| CN1423065A (en) * | 2001-11-30 | 2003-06-11 | 纽飞利有限公司 | Hollow rivet |
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| CN202628725U (en) * | 2012-06-15 | 2012-12-26 | 南车眉山车辆有限公司 | Shear resistant and leakage-proof pulling rivet |
| CN107923427A (en) * | 2015-08-14 | 2018-04-17 | 爱威德尔英国有限公司 | Rivet |
| CN108119463A (en) * | 2016-11-29 | 2018-06-05 | 余媛 | A kind of rivet simple in structure |
| CN208153506U (en) * | 2018-05-16 | 2018-11-27 | 眉山中车紧固件科技有限公司 | A kind of connection pulling rivet |
| CN209959670U (en) * | 2019-05-23 | 2020-01-17 | 邯郸市远大金属制品有限公司 | Self-plugging sealing rivet |
| CN210889638U (en) * | 2019-10-25 | 2020-06-30 | 浙江凌宇机械股份有限公司 | Floating brake disc rivet |
| CN214578189U (en) * | 2021-05-10 | 2021-11-02 | 青岛雷特金属制品有限公司 | Multi-drum type self-plugging rivet |
| CN214788452U (en) * | 2021-07-15 | 2021-11-19 | 青岛雷特金属制品有限公司 | Hollow rivet |
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2022
- 2022-02-15 CN CN202210136872.5A patent/CN114508536A/en active Pending
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|---|---|---|---|---|
| JPH10306814A (en) * | 1997-04-30 | 1998-11-17 | Ricoh Co Ltd | Blind rivet, mandrel therefor, and blind rivet structure |
| CN1423065A (en) * | 2001-11-30 | 2003-06-11 | 纽飞利有限公司 | Hollow rivet |
| CN200952517Y (en) * | 2006-08-17 | 2007-09-26 | 何米铃 | Special rivet structure improvement for wheel rim steel wire regulating hole |
| CN202628725U (en) * | 2012-06-15 | 2012-12-26 | 南车眉山车辆有限公司 | Shear resistant and leakage-proof pulling rivet |
| CN107923427A (en) * | 2015-08-14 | 2018-04-17 | 爱威德尔英国有限公司 | Rivet |
| CN108119463A (en) * | 2016-11-29 | 2018-06-05 | 余媛 | A kind of rivet simple in structure |
| CN208153506U (en) * | 2018-05-16 | 2018-11-27 | 眉山中车紧固件科技有限公司 | A kind of connection pulling rivet |
| CN209959670U (en) * | 2019-05-23 | 2020-01-17 | 邯郸市远大金属制品有限公司 | Self-plugging sealing rivet |
| CN210889638U (en) * | 2019-10-25 | 2020-06-30 | 浙江凌宇机械股份有限公司 | Floating brake disc rivet |
| CN214578189U (en) * | 2021-05-10 | 2021-11-02 | 青岛雷特金属制品有限公司 | Multi-drum type self-plugging rivet |
| CN214788452U (en) * | 2021-07-15 | 2021-11-19 | 青岛雷特金属制品有限公司 | Hollow rivet |
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