CN117399958A - Self-tapping turning riveting assembly for thin metal plate - Google Patents
Self-tapping turning riveting assembly for thin metal plate Download PDFInfo
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- CN117399958A CN117399958A CN202311551015.2A CN202311551015A CN117399958A CN 117399958 A CN117399958 A CN 117399958A CN 202311551015 A CN202311551015 A CN 202311551015A CN 117399958 A CN117399958 A CN 117399958A
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- riveting
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 160
- 239000002184 metal Substances 0.000 title claims abstract description 101
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/062—Pierce nut setting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G7/00—Forming thread by means of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention discloses a self-tapping and turning riveting assembly for thin metal plates, which comprises a self-tapping and turning riveting nut and a turning riveting punch, wherein the thin metal plates are provided with metal plate holes. The head of the self-tapping turning riveting nut is provided with a secondary locking through hole; the screw part is externally provided with a self-tapping external thread, and internally provided with a turning rivet through hole and a secondary locking threaded hole which is coaxially communicated with the turning rivet through hole and the secondary locking through hole; a turning riveting thin wall is formed between the turning riveting through hole and the self-tapping external thread; the self-tapping turning rivet nut is tightly locked into a sheet metal hole of the thin sheet metal from top to bottom, and is self-tapped; after self-tapping, the turning riveting punch is punched into a turning riveting through hole of the self-tapping turning riveting nut from bottom to top so as to turn the turning riveting thin wall into a flanging and fasten the thin sheet metal; the turning riveting punch is provided with an integrated punch and a split punch. The self-tapping rivet-turning assembly can prevent loosening, prevent falling, increase rivet strength, increase tightening and increase pull-off force when being riveted on the thin sheet metal, and is a self-tapping rivet-turning nut capable of locking bolts secondarily.
Description
Technical Field
The invention belongs to the technical field of fastener manufacturing, and particularly relates to a self-tapping and turning riveting nut and punch of an automobile fastener, which are particularly suitable for riveting thin metal plates.
Background
With the economic development, the automobile has increasingly frequent use on life, and has more strict requirements on the quality of the automobile, if the fastener on the automobile is loosened by sliding, the maintenance cost can be increased, the accident probability can be increased, the life safety and property of people are damaged, and the requirements on anti-slip and anti-loose are increasingly urgent.
For loosening anti-skid, at present, rivet riveting is mostly adopted in the industry to prevent skid and loosen, and the rivet and the like are connected by utilizing a method of deforming or interference fit to enable a plurality of parts to be connected, but phenomena of out-of-place riveting, cracking and the like often occur in thin sheet metal riveting.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a self-tapping turning riveting assembly for a thin sheet metal. The self-tapping rivet-turning assembly can prevent loosening, prevent falling, increase rivet strength, increase tightening and increase pull-off force when being riveted on the thin sheet metal, and is a self-tapping rivet-turning nut capable of locking bolts secondarily.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a self-tapping rivet turning assembly for thin metal plates comprises a self-tapping rivet turning nut and a rivet turning punch; the thin metal plate is provided with a metal plate hole; wherein,
the self-tapping turning riveting nut consists of a nut head part and a screw part; the head of the nut is provided with a secondary locking through hole; the screw rod part is externally provided with self-tapping external threads, and internally provided with a turning rivet through hole and a secondary locking threaded hole which is coaxially communicated with the turning rivet through hole and the secondary locking through hole; the inner diameter of the turning rivet through hole is larger than that of the secondary locking threaded hole, and a turning rivet thin wall is formed between the turning rivet through hole and the self-tapping external thread;
the self-tapping turning rivet nut is tightly locked into a sheet metal hole of the thin sheet metal from top to bottom, and is self-tapped; after self-tapping, the turning riveting punch is punched into a turning riveting through hole of the self-tapping turning riveting nut from bottom to top so as to turn the turning riveting thin wall into a flanging and fasten the thin sheet metal;
the flip riveting punch is an integrated punch and is an integrated structure consisting of a punch head and a punch pressing part; the punch press part is narrowed upwards and convexly arranged to form the punch head, and the punch head is provided with an introducing conical surface with a narrow upper part and a wide lower part, and the introducing conical surface is provided with a part with an outer diameter larger than the inner diameter of the turning rivet through hole;
a self-tapping rivet turning assembly for thin metal plates comprises a self-tapping rivet turning nut and a rivet turning punch; the thin metal plate is provided with a metal plate hole; wherein,
the self-tapping turning riveting nut consists of a nut head part and a screw part; the head of the nut is provided with a secondary locking through hole; the screw rod part is externally provided with self-tapping external threads, and internally provided with a turning rivet through hole and a secondary locking threaded hole which is coaxially communicated with the turning rivet through hole and the secondary locking through hole; the inner diameter of the turning rivet through hole is larger than that of the secondary locking threaded hole, and a turning rivet thin wall is formed between the turning rivet through hole and the self-tapping external thread;
the self-tapping turning rivet nut is tightly locked into a sheet metal hole of the thin sheet metal from top to bottom, and is self-tapped; after self-tapping, the turning riveting punch is punched into a turning riveting through hole of the self-tapping turning riveting nut from bottom to top so as to turn the turning riveting thin wall into a flanging and fasten the thin sheet metal;
the riveting punch is a split punch and comprises a first punch and a second punch; the outer diameter of the second punch is larger than that of the first punch, and the second punch is movably sleeved on the first punch; the first punch has a lead-in taper surface with a narrower upper part and a wider lower part, and the lead-in taper surface has a part with an outer diameter larger than the inner diameter of the rivet through hole.
The self-tapping rivet assembly for the thin metal plate is characterized in that the inner diameter of the rivet through hole is larger than the aperture of the metal plate hole of the thin metal plate.
The self-tapping turning riveting assembly for the thin metal plate has the aperture of the metal plate hole identical to the outer diameter of the cylinder of the screw rod part.
The self-tapping turning riveting assembly for the thin metal plate is characterized in that the thin metal plate replaces a plastic plate, and the metal plate holes are replaced by plastic holes.
The self-tapping turning riveting assembly for the thin metal plate has the advantages that the shape of the head part of the nut is designed into a polygonal structure; the self-tapping turning riveting nut is a flow drilling nut; the self-tapping external thread can be set as a triangle thread self-tapping thread, a ST self-tapping thread or a TP self-tapping thread.
The self-tapping rivet turning assembly for the thin metal plate is characterized in that the rivet turning through holes are smooth holes.
The technical scheme provided by the method has the following beneficial effects:
firstly, the self-tapping rivet nut is tightly locked into the sheet metal hole of the thin sheet metal from top to bottom, self-tapping is realized, and after self-tapping, the rivet-turning punch is punched into the rivet-turning through hole of the self-tapping rivet nut from bottom to top, so that the rivet-turning thin wall is turned, the thin sheet metal is fastened, and the self-tapping rivet nut can prevent loosening, prevent falling, increase riveting strength, increase screwing and increase pulling force.
Secondly, the self-tapping rivet nut can be locked into the external bolt through the secondary locking through hole and the secondary locking threaded hole at the same time, and the secondary connection and fastening with the external bolt are completed.
Thirdly, the inner diameter of the turning rivet through hole of the self-tapping turning rivet nut is larger than the aperture of the sheet metal hole of the thin sheet metal, so that the self-tapping turning rivet nut is beneficial to stretching hole turning during self-tapping and turning rivet.
Fourthly, the appearance design of the nut head of the self-tapping rivet nut is of a polygonal structure, which is different from the existing self-tapping screw fastener, can bear larger tightening force, larger pulling force and difficult to be damaged.
Fifthly, the self-tapping rivet nut is a flow drill nut, the flow drill nut is adopted to self-tap and stretch thin metal plates and self-tap threads, interference fit is generated, torque is increased, the self-tapping rivet nut is prevented from loosening, and the bonding strength is high.
Sixth, the self-tapping external thread of the self-tapping rivet nut can be set as triangle thread self-tapping thread, ST self-tapping thread or TP self-tapping thread, so as to provide good self-tapping capability.
Seventh, the through hole of the self-tapping and turning riveting nut is set as a smooth hole, so that the loosening anti-skid capability is improved after the self-tapping and turning riveting nut is turned and riveted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic perspective view of a self-tapping rivet nut of the present invention;
FIG. 2 is a schematic diagram showing a three-dimensional structure of a self-tapping rivet nut according to the present invention;
FIG. 3 is a schematic cross-sectional view of the self-tapping rivet nut of the present invention;
FIG. 4 is a schematic view of a cross-sectional structure of a self-tapping rivet nut according to the present invention (first embodiment);
FIG. 5 is a schematic diagram of a cross-sectional structure of a self-tapping rivet nut according to the present invention after self-tapping (first embodiment);
FIG. 6 is a schematic diagram of a cross-sectional structure of the thin sheet metal self-tapping and riveting assembly (first embodiment) before riveting;
FIG. 7 is a schematic diagram of a cross-sectional structure of a self-tapping and riveting assembly for thin sheet metal according to the present invention after riveting (first embodiment);
FIG. 8 is a schematic diagram of a cross-sectional structure of a self-tapping rivet nut of the present invention before self-tapping (second embodiment);
FIG. 9 is a schematic diagram of a cross-sectional structure of a self-tapping rivet nut according to the present invention after self-tapping (second embodiment); FIG. 10 is a schematic diagram of a cross-sectional structure of the self-tapping and turning-riveting assembly for thin sheet metal (second embodiment) before turning and riveting;
FIG. 11 is a schematic diagram of a cross-sectional structure of a self-tapping rivet assembly for thin sheet metal according to the present invention (second embodiment); fig. 12 is a schematic diagram of a cross-sectional structure of a self-tapping and turning-riveting assembly for thin sheet metal according to the second embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the invention.
In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.
In the claims, specification and drawings of the present invention, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.
The dimensions listed herein are all dimensions of the present embodiment, and the specific product dimensions may be set according to the actual situation.
Referring now to fig. 1 to 12, a self-tapping and riveting assembly for thin sheet metal according to the present invention is described, which includes a self-tapping and riveting nut 100 and a riveting punch 200, wherein the self-tapping and riveting nut 100 and the riveting punch 200 are matched and used for riveting on a thin sheet metal 300. The thin sheet metal 300 is provided with sheet metal holes 310.
The self-tapping rivet nut 100 of the present invention is integrally formed with a nut head 110 and a screw portion 120. Optimally, the self-tapping rivet nut 100 is a flow drill nut, the flow drill nut is adopted to self-tap and stretch the thin sheet metal 300, and self-tap threads are adopted to generate interference fit, so that the torque is increased, the self-tapping rivet nut 100 is prevented from loosening, and the bonding strength is high.
The outer shape of the nut head 110 may be a polygonal structure, such as an outer hexagonal structure as shown in fig. 1 and 2, or a square structure, an octagonal structure, or the like. The polygonal structure of the nut head 110 of the present invention is different from the existing self-tapping screw fastener, and can bear a larger tightening force, a larger pulling-out force and is not easy to be damaged. The nut head 110 of the present invention is provided with a secondary locking through hole 111, and after the self-tapping and the turning riveting of the self-tapping turning riveting nut 100 of the present invention are completed, an external bolt can be secondarily locked through the secondary locking through hole 111, thereby completing the connection and fastening with a third plate. The secondary locking through hole 111 may be provided as a screw hole or a light hole.
In this embodiment, the thickness of the nut head 110 is 1.5mm-3mm, the secondary locking through hole 111 is a cylindrical unthreaded hole, and an external bolt can pass through the secondary locking through hole 111 of the cylindrical unthreaded hole to be locked in the secondary locking threaded hole 121 of the screw portion 120, so as to complete the locking with the self-tapping rivet nut 100 of the present invention. When the secondary locking through hole 111 is set as a threaded hole, the external bolt can be directly locked in the secondary locking through hole 111 of the threaded hole; or, after the external bolt is screwed through the secondary locking through hole 111 of the threaded hole, the external bolt can be further locked into the secondary locking threaded hole 121 of the screw portion 120, so as to complete the locking with the self-tapping rivet nut 100 of the present invention.
The screw portion 120 is a main body of the self-tapping portion, and a self-tapping external thread 123 is provided outside the screw portion 120, and further, the self-tapping external thread 123 is a self-tapping thread such as a triangle thread self-tapping thread, an ST self-tapping thread or a TP self-tapping thread, so as to provide a good self-tapping capability. The screw portion 120 is internally provided with a secondary locking threaded hole 121 and a riveting through hole 122, and the secondary locking threaded hole 121 is coaxially communicated with the secondary locking through hole 111 and the riveting through hole 122. The turning rivet through hole 122 is set as a smooth hole, and is a turning rivet main body, and the loosening anti-slip capability is increased after the self-tapping turning rivet nut 100 turns rivet; and the inside diameter of the turning rivet through hole 122 is larger than that of the secondary locking threaded hole 121, and a turning rivet thin wall 130 is formed between the turning rivet through hole 122 and the self-tapping external thread 123. The rivet turning thin wall 130 is disposed corresponding to the rivet turning through hole 122. Further, the inside diameter a of the rivet hole 122 is larger than the hole diameter B of the sheet metal hole 310 of the thin sheet metal 300, so as to facilitate the stretching and hole flanging of the self-tapping rivet nut 100 during self-tapping and rivet-turning.
In this embodiment, the external thread of the screw portion 120 has a specification M8, and a length of 8mm-15mm; the cylindrical outer diameter of the screw portion 120 is set to 8mm-12mm. The secondary locking of the screw part 120 is performed on the internal thread specification M6 of the threaded hole 121, and the length is 5mm-8mm; the diameter of the unthreaded hole of the flip rivet through hole 122 is 6mm-8mm, and the length of the unthreaded hole is 5mm-8mm; the thickness of the turnover riveting thin wall 130 is 1.5mm-2mm. The self-tapping and turning-riveting nut 100 of the present invention, after the self-tapping and turning-riveting are completed, can be locked into an external bolt through the secondary locking threaded hole 121, and can be secondarily connected and fastened with the external bolt.
The flip rivet punch 200 is provided with an integral punch 210 and a split punch 220. The self-tapping rivet nut 100 is tightly locked into the sheet metal hole 310 of the thin sheet metal 300 from top to bottom, and interference fit and self-tapping threads are generated between the sheet metal hole 310 and the self-tapping rivet nut 100. After self-tapping, the turning rivet punch 200 is punched into the turning rivet through hole 122 of the self-tapping turning rivet nut 100 from bottom to top, and the turning rivet thin wall 130 arranged corresponding to the turning rivet through hole 122 is turned over under the action of the turning rivet punch 200 and fastened with the thin sheet metal 300; meanwhile, the external bolt can be locked through the secondary locking through hole 111 and the secondary locking threaded hole 121, so that secondary connection and fastening with the external bolt are completed.
In the first embodiment, the flip-rivet punch 200 is an integral punch 210, and is particularly suitable for processing a thin sheet metal 300 with a hole diameter B of the sheet metal hole 310 smaller than the inner diameter a of the flip-rivet through hole 122. The integrated punch 210 is an integrated structure composed of a punch head 211 and a punch press 212, the punch press 212 is narrowed and protruded upward to form the punch head 211, the punch head 211 has a narrow upper and wide lower lead-in tapered surface 211A, the lead-in tapered surface 211A has a portion having an outer diameter larger than an inner diameter a of the rivet through hole 122, so that the rivet through hole 122 is burred along the lead-in tapered surface 211A.
Referring to fig. 4 and 5, in the self-tapping of the self-tapping rivet nut 100 in the first embodiment, the self-tapping rivet nut 100 is drilled by flowing and locked into the sheet metal hole 310 of the thin sheet metal 300, so that the sheet metal hole 310 smaller than the rivet through hole 122 extends downwards to be recessed, and meanwhile, interference fit self-tapping threads are generated with the screw portion 120, thereby increasing torque. After self-tapping, referring to fig. 6 and 7, the integral punch 210 is pressed into the rivet turning through hole 122 from bottom to top, the rivet turning thin wall 130 is turned around outwards under the action of the punch head 211, and the self-tapping external thread 123 of the screw portion 120 is pressed into the thin sheet metal 300 under the further pressing of the punch pressing portion 212, so as to fasten the thin sheet metal 300, thereby increasing the pulling force of the self-tapping rivet turning nut 100 of the present invention.
In the second embodiment, the flip punch 200 is a split punch 220, and is particularly suitable for processing a thin sheet metal 300 with the aperture B of the sheet metal hole 310 being the same as the outer diameter d of the cylinder of the screw portion 120. Referring to fig. 10 to 11, the split punch 220 includes a first punch 221 and a second punch 222. The second punch 222 has an outer diameter larger than that of the first punch 221, and the second punch 222 is movably sleeved on the first punch 221. The first punch 221 has a lead-in frustum surface 221A having a narrower upper portion and a wider lower portion, and the lead-in frustum surface 211A has a portion having an outer diameter larger than an inner diameter a of the clinching through hole 122 so that the clinching through hole 122 is clinched along the lead-in frustum surface 211A.
Referring to fig. 8 and 9, in the self-tapping of the self-tapping rivet nut 100 of the second embodiment, the self-tapping rivet nut 100 locked into the sheet metal hole 310 of the thin sheet metal 300 is self-tapped by the screw portion 120 being interference fit into the sheet metal hole 310, thereby increasing torque. After self-tapping, referring to fig. 10 to 12, the first punch 221 is punched into the rivet turning through hole 122 from bottom to top, under the action of the first punch 221, the rivet turning through hole 122 is turned and deformed along the leading-in frustum surface 211A, so that the rivet turning thin wall 130 is turned and turned upwards around, when the first punch 221 is fixed to top, or when the rivet turning thin wall 130 is close to the thin metal plate 300, the second punch 222 moves towards the direction of the thin metal plate 300 relative to the first punch 221, so that the self-tapping external thread 123 of the self-tapping rivet turning nut 100 pierces the thin metal plate 300, and in this process, the first punch 221 is always not moved (provided that the bending strength of the thin metal plate 300 is greater than the bending strength of the feature of the rivet turning thin wall 130, when the bending strength of the thin metal plate 300 is smaller than the rivet turning thin wall 130, the first punch 221 needs to avoid), so that the rivet turning thin metal plate 130 is turned and the self-tapping external thread 123 pierces the thin metal plate 300. Because the thin sheet metal 300 is thinner, the strength of the connection between the self-tapping external thread 123 and the thin sheet metal 300 after the self-tapping threads is insufficient, and the strength of the self-tapping turning rivet nut 100 can be increased after the self-tapping external thread 123 penetrates into the thin sheet metal 300 through the turned edge. The present solution is equally applicable with plastic plates instead of thin sheet metal 300.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, as aforesaid, it is to be understood that the invention is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either with the foregoing teachings or with skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (10)
1. The self-tapping and turning-riveting assembly for the thin metal plate is characterized by comprising a self-tapping and turning-riveting nut (100) and a turning-riveting punch (200); the Bao Banjin (300) is provided with a sheet metal hole (310); wherein,
the self-tapping turning riveting nut (100) is integrally formed by a nut head (110) and a screw rod part (120); the nut head (110) is provided with a secondary locking through hole (111); the screw part (120) is externally provided with a self-tapping external thread (123), and internally provided with a turning rivet through hole (122) and a secondary locking screw hole (121) which is coaxially communicated with the turning rivet through hole (122) and the secondary locking through hole (111); the inner diameter of the turning rivet through hole (122) is larger than that of the secondary locking threaded hole (121), and a turning rivet thin wall (130) is formed between the turning rivet through hole (122) and the self-tapping external thread (123);
the self-tapping rivet nut (100) is tightly locked into a sheet metal hole (310) of the thin sheet metal (300) from top to bottom, and is self-tapped; after self-tapping, the turning riveting punch (200) is punched into a turning riveting through hole (122) of the self-tapping turning riveting nut (100) from bottom to top so as to turn the turning riveting thin wall (130) into a turned edge and fasten the thin sheet metal (300);
the flip riveting punch (200) is an integrated punch (210) and is an integrated structure consisting of a punch head (211) and a punch pressing part (212); the punch press portion (212) is narrowed and projected upward to form the punch head (211), the punch head (211) has an upper narrow and lower wide lead-in conical surface (211A), and the lead-in conical surface (211A) has a portion with an outer diameter larger than an inner diameter (A) of the rivet through hole (122).
2. The self-tapping and turning-riveting assembly for the thin metal plate is characterized by comprising a self-tapping and turning-riveting nut (100) and a turning-riveting punch (200); the Bao Banjin (300) is provided with a sheet metal hole (310); wherein,
the self-tapping turning riveting nut (100) is integrally formed by a nut head (110) and a screw rod part (120); the nut head (110) is provided with a secondary locking through hole (111); the screw part (120) is externally provided with a self-tapping external thread (123), and internally provided with a turning rivet through hole (122) and a secondary locking screw hole (121) which is coaxially communicated with the turning rivet through hole (122) and the secondary locking through hole (111); the inner diameter of the turning rivet through hole (122) is larger than that of the secondary locking threaded hole (121), and a turning rivet thin wall (130) is formed between the turning rivet through hole (122) and the self-tapping external thread (123);
the self-tapping rivet nut (100) is tightly locked into a sheet metal hole (310) of the thin sheet metal (300) from top to bottom, and is self-tapped; after self-tapping, the turning riveting punch (200) is punched into a turning riveting through hole (122) of the self-tapping turning riveting nut (100) from bottom to top so as to turn the turning riveting thin wall (130) into a turned edge and fasten the thin sheet metal (300);
the turning riveting punch (200) is a split punch (220) and comprises a first punch (221) and a second punch (222); the outer diameter of the second punch (222) is larger than that of the first punch (221), and the second punch (222) is movably sleeved on the first punch (221); the first punch (221) has a lead-in frustoconical surface (221A) having a narrower upper portion and a wider lower portion, and the lead-in frustoconical surface (211A) has a portion having an outer diameter larger than an inner diameter (A) of the clinching through hole (122).
3. The self-tapping and riveting assembly for thin sheet metal of claim 1, wherein the inside diameter (a) of the rivet hole (122) is greater than the aperture (B) of the sheet metal hole (310) of Bao Banjin (300).
4. The self-tapping rivet assembly for thin sheet metal as set forth in claim 2, characterized in that the aperture (B) of the sheet metal hole (310) is the same as the cylinder outer diameter (d) of the screw portion (120).
5. The self-tapping rivet assembly for thin sheet metal, as set forth in claim 4, wherein plastic plate replaces said Bao Banjin (300), and said sheet metal hole (310) is replaced with a plastic hole.
6. A self-tapping, clinching and riveting assembly for thin sheet metal as claimed in claim 1, 2, 3, 4 or 5 wherein the nut head (110) is of polygonal configuration.
7. A self-tapping rivet assembly for thin sheet metal as set forth in claim 1, 2, 3, 4 or 5, wherein said self-tapping rivet nut (100) is a flow drilling nut.
8. A self-tapping, turning and riveting assembly for thin sheet metal according to claim 1, 2, 3, 4 or 5, characterized in that the self-tapping external thread (123) can be a triangle thread, ST thread or TP thread, and the turning and riveting through hole (122) is a unthreaded hole.
9. The self-tapping and riveting assembly for thin sheet metal according to claim 6, wherein the self-tapping external screw thread (123) can be a triangle thread self-tapping screw thread, an ST self-tapping screw thread or a TP self-tapping screw thread, and the riveting through hole (122) is a unthreaded hole.
10. The self-tapping and riveting assembly for thin sheet metal according to claim 7, wherein the self-tapping external screw thread (123) can be a triangle thread self-tapping screw thread, an ST self-tapping screw thread or a TP self-tapping screw thread, and the riveting through hole (122) is a unthreaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311551015.2A CN117399958A (en) | 2023-11-20 | 2023-11-20 | Self-tapping turning riveting assembly for thin metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311551015.2A CN117399958A (en) | 2023-11-20 | 2023-11-20 | Self-tapping turning riveting assembly for thin metal plate |
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| Publication Number | Publication Date |
|---|---|
| CN117399958A true CN117399958A (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311551015.2A Pending CN117399958A (en) | 2023-11-20 | 2023-11-20 | Self-tapping turning riveting assembly for thin metal plate |
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| Country | Link |
|---|---|
| CN (1) | CN117399958A (en) |
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2023
- 2023-11-20 CN CN202311551015.2A patent/CN117399958A/en active Pending
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