CN117028389B - Full thread riveted shear fastener and method of use thereof - Google Patents
Full thread riveted shear fastener and method of use thereof Download PDFInfo
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- CN117028389B CN117028389B CN202311300417.5A CN202311300417A CN117028389B CN 117028389 B CN117028389 B CN 117028389B CN 202311300417 A CN202311300417 A CN 202311300417A CN 117028389 B CN117028389 B CN 117028389B
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- riveting
- screw
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010008 shearing Methods 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000009972 noncorrosive effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
- F16B19/1036—Blind rivets
- F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
- F16B19/1072—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like comprising a thread and being rotated with respect to the rivet, thereby mechanically expanding and fastening the rivet
-
- 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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
- F16B37/145—Sleeve nuts, e.g. combined with bolts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Connection Of Plates (AREA)
Abstract
The invention relates to the technical field of riveting, in particular to a shearing-resistant fastener for full-type threaded riveting and a using method thereof. The full-type thread riveting shear-resistant fastener comprises a screw pipe, a riveting pipe, a sleeve and a screw rod, wherein the screw pipe comprises a first head and a pipe body, the screw rod comprises a second head and a rod body, the rod body is in threaded connection with the pipe body, the riveting pipe is enabled to transversely expand by screwing the second head or the first head to extrude the riveting pipe, and therefore the sleeve is forced to transversely expand until the fastener fills the connecting hole, and riveting of the fastener and the connecting hole is achieved. The shearing-resistant fastener is small in sliding deformation, can be suitable for connecting parts with strict shearing-resistant connection deformation requirements, has good energy consumption capacity, is particularly suitable for shearing-resistant connection under the action of dynamic load, and is high in riveting efficiency, stable and reliable in riveting quality, controllable in mounting precision and more convenient to mount or dismount.
Description
Technical Field
The invention relates to the technical field of riveting, in particular to a shearing-resistant fastener for full-type threaded riveting and a using method thereof.
Background
In building structures, bridge structures, wind towers, power towers and mechanical equipment, it is one of the common situations that the fasteners connecting the components bear the shearing force. When the nominal diameter of the fastener is larger than 10mm, the fasteners used for the shearing connection are mainly composed of three types of common rivets, ring groove rivets and bolts.
When the common rivet is adopted for connection, the rivet can fill the hole body of the part to realize close contact, the stress performance is reliable, the connection deformation is small when the rivet is subjected to the shearing force, and the rivet has better dynamic load resistance; however, the common rivet needs special equipment with larger body shape and weight for installation, has low efficiency, and particularly has a narrow installation space at a connecting position, and the equipment is limited and can not guarantee the connection quality. When ring slot rivets are used for connection, the parts can be tightly attached, the friction type force transmission mode is aimed at shear connection, and the stress performance is reliable; however, for parts made of stainless steel, aluminum alloy or other materials with lower surface roughness, gaps exist between the rivets and the hole bodies under the shearing force, so that the slippage deformation is large, the connection performance is poor, the ring groove rivets also need to be installed by special equipment with larger volume, the mobility is poor during riveting, and the quality is difficult to guarantee. When the bolt connection is adopted, the fastening is realized by utilizing the threads, the installation efficiency is high, the adaptability to the installation space is strong, and special equipment is not needed; however, for the shearing connection bearing dynamic load, when the roughness of the surface of the part is low and force transmission cannot be carried out by friction, the shearing resistance of the connection is greatly affected due to the sliding deformation caused by the clearance between the screw hole and the bolt, and the overall stress performance of the structure can be affected when serious.
Therefore, there is a need to develop a shear fastener that has high installation efficiency, stable and reliable connection quality, and can be applied to connection of components that cannot rely on friction to transfer force.
Disclosure of Invention
The invention provides a full-type thread riveting shear fastener and a use method thereof, which aim to overcome the technical defects that the existing shear fastener cannot simultaneously meet the requirements of high installation efficiency, stable and reliable connection quality and small sliding deformation.
The invention provides a full thread riveting shear fastener, comprising:
a screw tube comprising a first head and a tube body, the tube body being provided with an internal thread;
the riveting pipe is suitable for being sleeved on the outer side of the pipe body in a clearance mode, and the length of the riveting pipe is longer than that of the pipe body;
the sleeve is suitable for being sleeved on the outer side of the riveting pipe in a clearance mode, the length of the sleeve is equal to that of the pipe body, through slits are formed in the side wall of the sleeve, two ends of each through slit extend to two ends of the sleeve, and the through slits are suitable for releasing annular constraint force;
a screw comprising a second head and a rod body provided with an external thread adapted to an internal thread of the tube body;
the yield strength of the screw tube, the yield strength of the sleeve and the yield strength of the screw rod are all larger than those of the rivet tube, and the rivet tube transversely expands under the extrusion action of the first head and the second head and forces the sleeve to transversely expand through the through seam when being fastened.
Optionally, the first head and the second head all include hexagon head and semicircle head, hexagon head and corresponding pipe body or pole body coupling and coaxial, the semicircle head is the sphere and lacks, the height of sphere lacks is less than corresponding spheroidal radius, the bottom surface laminating of sphere lacks in on the terminal surface of hexagon head, just the bottom surface centre of a circle of sphere is located on the axis of hexagon head.
Optionally, the hexagonal head deviates from the terminal surface inscription that the ball lacks has circular gasket, hexagonal head and semicircle head are forged the shaping in an organic whole.
Optionally, the average roughness of the outer end surface of the circular gasket is less than or equal to Ra1.6.
Optionally, the average roughness of the outer circular surface of the pipe body, the average roughness of the inner circular surface and the outer circular surface of the rivet pipe and the average roughness of the inner circular surface of the sleeve are all less than or equal to Ra1.6.
Optionally, the root of the pipe body is matched with the end part of the riveting pipe, and the root of the rod body is matched with the end part of the pipe body through chamfer angles.
Optionally, the nominal diameter of the screw is more than or equal to 5mm, the outer diameter of the screw tube is more than or equal to 9mm, the wall thickness of the sleeve is 0.6mm to 1.2mm, and the width of the through seam is less than or equal to 0.25mm.
Optionally, the screw tube, the sleeve and the screw rod are made of stainless steel S304 or titanium TA2, and the rivet tube is made of aluminum alloy 3003-H12.
The invention provides a use method of a full-type thread riveting shear fastener, which sequentially comprises the following steps:
s1, selecting a sleeve with a length L and an outer diameter D according to the total thickness t of the connected parts and the diameter D of the connecting hole, wherein L=t- (0.2 mm to 0.5 mm) and D=d- (0.2 mm to 0.5 mm);
s2, sequentially sleeving a riveting pipe and a sleeve outside the solenoid, and inserting the assembly part from one side of the connecting hole;
s3, screwing the screw rod into the screw tube from the other side of the connecting hole;
s4, applying torque to the first head or the second head, forcing the riveting pipe to transversely expand, extruding the sleeve to transversely expand until the shearing fastener with the full thread is full of the connecting hole, and finishing assembly.
Optionally, in step S2, a non-corrosive lubricant is coated between the screw tube and the rivet tube, and between the rivet tube and the sleeve.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
the invention provides a full-type thread riveting shear-resistant fastener which comprises a screw tube, a riveting tube, a sleeve and a screw rod, wherein the screw tube comprises a first head and a tube body, the screw rod comprises a second head and a rod body, the rod body is in threaded connection with the tube body, the riveting tube is transversely expanded by screwing the second head or the first head to extrude the riveting tube, so that the sleeve is forced to transversely expand until the fastener fills a connecting hole, and the riveting of the fastener and the connecting hole is realized. The shearing-resistant fastener can be tightly contacted with the hole wall of the connecting hole, is direct in force transmission and small in sliding deformation, and can be suitable for connecting parts with strict shearing-resistant connecting deformation requirements; and the riveting pipe with relatively smaller yield strength is in a three-way constraint state of the connecting hole, the first head and the second head, has good energy consumption capability, and is particularly suitable for shearing connection under the action of dynamic load. When the shearing-resistant fastener is installed, a manual or electric torque wrench is adopted, special equipment with large volume or weight is not needed, the riveting efficiency is high, meanwhile, the adaptability to the installation space is high, and the stability and reliability of the riveting quality can be ensured; the riveting of the fastener is completed by applying torque to the first head or the second head, the riveting state can be controlled by controlling the torque, and the installation accuracy is controllable; furthermore, as the components are assembled by adopting gaps, the fine adjustment is realized, and the installation of parts with more fasteners or higher installation accuracy requirement is facilitated; in addition, when the fastener reaches the service life or needs to be disassembled, the pretension force of the fastener and the hoop stress generated by riveting can be released by disassembling the screw rod and the screw tube, and the disassembly or the replacement are convenient.
According to the application method of the full-type thread riveting shear-resistant fastener, provided by the invention, the riveting quality of the fastener and the connecting hole can be ensured by selecting the sleeve matched with the connecting hole.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view showing the assembly structure of the full thread riveted shear fastener of example 1 of the present invention;
FIG. 2 is a schematic view showing the structure of a coil according to embodiment 1 of the present invention;
FIG. 3 is a schematic view showing the structure of the rivet pipe according to the embodiment 1 of the present invention;
FIG. 4 is a schematic view showing the structure of a sleeve according to embodiment 1 of the present invention;
FIG. 5 is a schematic view showing the structure of a screw according to example 1 of the present invention;
FIG. 6 is a schematic view showing the assembly process of the rivet pipe according to the embodiment 2 of the present invention;
FIG. 7 is a schematic view showing the assembly process of the sleeve according to embodiment 2 of the present invention;
FIG. 8 is a schematic view showing the structure of the screw tube, rivet tube and sleeve forming assembly according to embodiment 2 of the present invention;
FIG. 9 is a schematic view showing the assembly process of the screw according to example 2 of the present invention.
In the figure:
1. a solenoid; 11. a first head; 12. a tube body; 2. riveting a pipe; 3. a sleeve; 31. a through seam is formed; 4. a screw; 41. a second head; 42. a lever body; 51. a hexagonal head; 52. a half round head; 53. a circular gasket; 6. chamfering.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a full-type thread riveting shear fastener, which comprises a screw tube 1, a rivet tube 2, a sleeve 3 and a screw 4; the screw tube 1 comprises a first head 11 and a tube body 12, wherein the tube body 12 is provided with internal threads; the riveting pipe 2 is suitable for being sleeved outside the pipe body 12 in a clearance way, and the length of the riveting pipe 2 is longer than that of the pipe body 12; the sleeve 3 is suitable for being sleeved on the outer side of the riveting pipe 2 in a clearance way, the length of the sleeve 3 is equal to that of the pipe body 12, through slits 31 are formed in the side wall of the sleeve 3, two ends of the through slits 31 extend to two ends of the sleeve 3, and the through slits 31 are suitable for releasing annular constraint force; the screw 4 comprises a second head 41 and a rod body 42, the rod body 42 being provided with an external thread which is adapted to the internal thread of the tube body 12; the yield strength of the screw 1, the yield strength of the sleeve 3 and the yield strength of the screw 4 are all greater than the yield strength of the rivet pipe 2, and when fastened, the rivet pipe 2 expands laterally under the squeezing action of the first head 11 and the second head 41 and forces the sleeve 3 to expand laterally through the through-slit 31.
In this embodiment, the first head 11 and the second head 41 both include a hexagonal head 51 and a half-round head 52, the hexagonal head 51 is connected and coaxial with the corresponding pipe body 12 or rod body 42, the half-round head 52 is a segment, the height of the segment is smaller than the radius of the corresponding sphere, the bottom surface of the segment is attached to the end surface of the hexagonal head 51, and the center of the bottom surface of the segment is located on the axis of the hexagonal head 51.
It is easy to understand that the hexagonal head 51 is a regular hexagonal prism in a flat shape, which is the head shape of a common bolt; the segment is a part of the segment cut by the plane, the cross section is called the bottom surface of the segment, and the height of the segment cut by the diameter vertical to the bottom surface is the height of the segment.
The first head 11 and the second head 41 in the present embodiment, the hexagonal head 51 is used for fastening when the manual or electric torque wrench is fastened; the half head 52 has good decorative effect, can strengthen the strength and the rigidity of the head, and can avoid the damage to the fastener caused by collision, thereby effectively prolonging the service life of the fastener.
Further, the end face of the hexagonal head 51, which is far away from the ball gap, is internally connected with a circular gasket 53, and the circular gasket 53, the hexagonal head 51 and the semicircular head 52 are integrally formed by forging. The round gasket 53 can prevent the scratch of the connected parts in the fastening process of the hexagonal head 51, and the round gasket 53, the hexagonal head 51 and the semicircular head 52 are integrally formed, so that the round gasket 53 can be prevented from being lost.
Specifically, the average roughness of the outer end surface of the circular gasket 53 is less than or equal to Ra1.6, and the phenomenon that the circular gasket 53 is too large in roughness to bite the connected piece is avoided.
In this embodiment, not only the body 12 is provided with the internal thread, but also the hexagonal head 51 is provided with the internal thread, so that the length of the rod body 42 matched with the internal thread can be increased, and the threaded connection is firmer.
In this embodiment, the average roughness of the outer circular surface of the pipe body 12, the average roughness of the inner circular surface and the outer circular surface of the rivet pipe 2, and the average roughness of the inner circular surface of the sleeve 3 are all equal to or less than ra1.6, so that excessive consumption torque caused by the friction force between components is avoided, the transverse expansion of the rivet pipe 2 is influenced, the uniformity of the expansion of the rivet pipe 2 is ensured, and the gap between the fastener and the connecting hole is fully compacted.
In the present embodiment, the through slit 31 has a linear shape arranged in the axial direction of the sleeve 3. In other embodiments, the through seam 31 may be saw tooth shaped or wavy line shaped. The main function of the through slits 31 is to release the circumferential restraining force, which is more beneficial for the lateral expansion of the sleeve 3.
In this embodiment, the root of the pipe body 12 and the end of the rivet pipe 2, and the root of the rod body 42 and the end of the pipe body 12 are engaged by the chamfer 6.
Specifically, the radius of the chamfer 6 is not less than 1.0mm.
The chamfer 6 in this embodiment is matched, so that stress concentration can be reduced, and the service life of the fastener can be ensured.
In the embodiment, the nominal diameter of the screw 4 is more than or equal to 5mm, the outer diameter of the screw 1 is more than or equal to 9mm, the wall thickness of the sleeve 3 is 0.6mm to 1.2mm, and the width of the through seam 31 is less than or equal to 0.25mm.
Further, the inner diameter of the sleeve 3 is 0.2mm larger than the outer diameter of the rivet pipe 2, the inner diameter of the rivet pipe 2 is 0.2mm larger than the outer diameter of the screw pipe 1, and the wall thickness of the rivet pipe 2 meets the construction requirement and the design value of the tensile bearing capacity of the screw 4.
In this embodiment, the screw tube 1, the sleeve 3 and the screw 4 are made of stainless steel S304 or titanium TA2, and the rivet tube 2 is made of aluminum alloy 3003-H12. Stainless steel S304 and titanium TA2 have larger yield strength, aluminum alloy 3003-H12 have smaller yield strength, sleeve 3 is used as a first line of defense against shearing, and under the restraint and support of screw 4 and screw 4, the fastener has higher shearing bearing capacity and corresponding shearing deformation is small; the rivet pipe 2 with excellent plasticity in the fastener is in a three-way constraint state of the connecting hole, the first head 11 and the second head 41, has good energy consumption capability, and is particularly suitable for shearing connection under the action of dynamic load.
Example 2
The application method of the full-type thread riveting shear fastener provided by the invention sequentially comprises the steps S1 to S5.
S1, a sleeve 3 with a length L and an outer diameter D is selected according to the total thickness t of the connected parts and the diameter D of the connecting hole, wherein L=t- (0.2 mm to 0.5 mm) and D=d- (0.2 mm to 0.5 mm).
After the dimensions of the sleeve 3 are determined, the dimensions of the other components can be deduced from the clearance fit and the length relationship.
In the embodiment, based on the existing processing and manufacturing capability and matching requirements, the nominal diameter of the screw 4 is more than or equal to 5mm, the outer diameter of the screw 1 is more than or equal to 9mm, the wall thickness of the sleeve 3 is 0.6mm to 1.2mm, and the wall thickness of the riveting pipe 2 meets the structural requirements and the design value of the tensile bearing capacity of the screw 4.
S2, sequentially sleeving a riveting pipe 2 and a sleeve 3 outside the solenoid 1, and then inserting the assembly part from one side of the connecting hole;
in this embodiment, a non-corrosive lubricant is coated between the screw tube 1 and the rivet tube 2 and between the rivet tube 2 and the sleeve 3.
In particular, the lubricant may be molybdenum disulfide or other commonly used lubricants.
The lubricant in the embodiment can make the friction force between the sleeve 3 and the rivet pipe 2 and between the rivet pipe 2 and the screw pipe 1 approximately uniform, thereby ensuring the uniformity of expansion of the rivet pipe 2 and fully compacting the gap between the fastener and the connecting hole.
S3, screwing the screw 4 into the screw tube 1 from the other side of the connecting hole;
s4, applying torque to the first head 11 or the second head 41 to force the rivet pipe 2 to transversely expand, and extruding the sleeve 3 to transversely expand until the shearing-resistant fastener with the full thread riveting fills the connecting hole, so that the assembly is completed.
Specifically, torque may be applied to the first head 11 or the second head 41 manually or with an electric torque wrench. Preferably, an electric torque wrench is used, by which a set torque can be applied to the second head 41 and precisely converted into a pretensioning force of the fastener, the pretensioning force reacting against the rivet pipe 2 with a longitudinal pressure to bring the rivet pipe 2 into a plastic state, the rivet pipe 2 being longitudinally shortened and laterally expanded to achieve filling between the fastener and the hole body.
It is easy to understand that the volume of the rivet pipe 2 extending out of the part of the connected parts is equal to the sum of the volumes of the three gaps of the gap between the shearing-resistant fastener and the connecting hole, the gap between the rivet pipe 2 and the screw pipe 1 and the gap between the rivet pipe 2 and the sleeve pipe 3, so that the shearing-resistant fastener with the full-type thread riveting can fill the connecting hole, and the shearing resistance is ensured.
The foregoing is merely exemplary of embodiments of the present invention to enable those skilled in the art to understand or practice the invention. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.
Claims (6)
1. A full thread riveted shear fastener comprising:
a screw (1) comprising a first head (11) and a tube body (12), said tube body (12) being provided with an internal thread;
the riveting pipe (2) is suitable for being sleeved outside the pipe body (12) in a clearance mode, and the length of the riveting pipe (2) is larger than that of the pipe body (12);
the sleeve (3) is suitable for being sleeved on the outer side of the rivet pipe (2) in a clearance mode, the length of the sleeve (3) is equal to that of the pipe body (12), through slits (31) are formed in the side wall of the sleeve (3), two ends of the through slits (31) extend to two ends of the sleeve (3), and the through slits (31) are suitable for releasing annular constraint force;
-a screw (4) comprising a second head (41) and a rod body (42), said rod body (42) being provided with an external thread adapted to an internal thread of said tube body (12);
the yield strength of the screw pipe (1), the yield strength of the sleeve (3) and the yield strength of the screw rod (4) are all larger than the yield strength of the rivet pipe (2), the volume of the rivet pipe (2) extending outwards from the part to be connected is equal to the sum of the volumes of a shearing-resistant fastener and a connecting hole gap of full threaded riveting, the gap between the rivet pipe (2) and the screw pipe (1) and the volume of the three gaps between the rivet pipe (2) and the sleeve (3), the rivet pipe (2) transversely expands under the extrusion action of the first head (11) and the second head (41) and forces the sleeve (3) to transversely expand until the fastener fills the connecting hole, the materials of the screw pipe (1), the sleeve (3) and the screw rod (4) are stainless steel S304 or titanium TA2, and the materials of the rivet pipe (2) are aluminum alloys 3003-H12;
the first head (11) and the second head (41) comprise a hexagonal head (51) and a semicircular head (52), the hexagonal head (51) is connected with a corresponding pipe body (12) or rod body (42) and is coaxial, the semicircular head (52) is a spherical segment, the height of the spherical segment is smaller than the radius of a corresponding sphere, the bottom surface of the spherical segment is attached to the end surface of the hexagonal head (51), the center of the bottom surface of the spherical segment is located on the axis of the hexagonal head (51), the hexagonal head (51) is deviated from the end surface of the spherical segment, a circular gasket (53) is connected with the end surface of the hexagonal head (51) in an inscription manner, the circular gasket (53), the hexagonal head (51) and the semicircular head (52) are integrally forged and formed, the nominal diameter of the screw rod (4) is not smaller than 5mm, the outer diameter of the screw tube (1) is not smaller than 9mm, the wall thickness of the sleeve (3) is not smaller than 0.6mm to 1.2mm, and the width of the through seam (31) is not larger than 0.25mm.
2. The full-thread riveted shear fastener of claim 1, wherein the average roughness of the outer end surface of the circular washer (53) is equal to or less than ra1.6.
3. The full-face threaded riveted shear fastener of claim 1, wherein the average roughness of the outer circumferential surface of the tube body (12), the average roughness of the inner and outer circumferential surfaces of the rivet tube (2), and the average roughness of the inner circumferential surface of the sleeve (3) are all equal to or less than ra1.6.
4. The full thread riveted shear fastener according to claim 1, wherein the root of the pipe body (12) and the end of the rivet pipe (2), the root of the shank body (42) and the end of the pipe body (12) are all engaged by a chamfer (6).
5. A method of using the full thread riveted shear fastener of claim 1, comprising the steps of, in sequence:
s1, selecting a sleeve (3) with the length L and the outer diameter D according to the total thickness t of the connected parts and the diameter D of the connecting hole, wherein L=t- (0.2 mm to 0.5 mm) and D=d- (0.2 mm to 0.5 mm);
s2, sequentially sleeving a riveting pipe (2) and a sleeve (3) outside the solenoid (1), and then inserting the assembly part from one side of the connecting hole;
s3, screwing the screw rod (4) into the screw tube (1) from the other side of the connecting hole;
s4, applying torque to the first head (11) or the second head (41), extruding the riveting pipe (2) to transversely expand, forcing the sleeve (3) to transversely expand until the shearing-resistant fastener with the full thread riveting fills the connecting hole, and finishing assembly.
6. The method of using a full thread riveted shear fastener according to claim 5, wherein in step S2, a non-corrosive lubricant is applied between the screw tube (1) and the rivet tube (2) and between the rivet tube (2) and the sleeve (3).
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| CN202311300417.5A CN117028389B (en) | 2023-10-10 | 2023-10-10 | Full thread riveted shear fastener and method of use thereof |
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| CN202311300417.5A CN117028389B (en) | 2023-10-10 | 2023-10-10 | Full thread riveted shear fastener and method of use thereof |
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| CN117028389B true CN117028389B (en) | 2024-01-26 |
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