CN107939809B - Nut fixing structure and manufacturing method thereof - Google Patents
Nut fixing structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN107939809B CN107939809B CN201710939299.0A CN201710939299A CN107939809B CN 107939809 B CN107939809 B CN 107939809B CN 201710939299 A CN201710939299 A CN 201710939299A CN 107939809 B CN107939809 B CN 107939809B
- Authority
- CN
- China
- Prior art keywords
- nut
- boss
- groove
- mounting hole
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims description 10
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
- 238000003466 welding Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
- F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
- F16B37/065—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the nut
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
- F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
- F16B37/068—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the support, e.g. the sheet or plate
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The nut comprises a nut body and a first boss arranged on the nut body, a first groove is formed in a position, located between the outer wall of the nut body and the outer wall of the first boss, of the nut body, the side wall of the first groove is arranged in an inward inclined mode, the plate comprises a plate body and a second boss arranged on the plate body, the second boss is riveted with the first groove, a first mounting hole penetrating through the second boss is formed in the center of the second boss, and the inner wall of the first mounting hole is in contact with the outer wall of the first boss; during manufacturing, the bar is cold-headed to form the nut, the second boss is punched at the position of the plate material where the nut needs to be fixed, one surface of the nut is machined into a first groove matched with the second boss, the side wall of the first groove is compressed inwards, and then the second boss is extruded into the first groove by adopting a riveting die. The design has the advantages of simple structure, high reliability, good torsion resistance and tensile resistance, simple manufacture and low manufacturing cost.
Description
Technical Field
The invention relates to the technical field of automobile nut fixing, in particular to a nut fixing structure and a manufacturing method thereof, which are mainly applicable to simplifying the structure and improving the reliability.
Background
The existing fixing nuts on the automobile mainly comprise a body nut, a door plate nut, a chassis nut and the like, and the welding nuts are used as main stream processes. In addition, the smaller nuts (below M6, mainly for fixing electronic components) on the sheet are also provided with the nuts which are directly punched and flanged on the sheet by adopting hexagonal (or four-corner) nuts (the 6 th stage of 1997 of new technology). The technique of welding nuts has the following drawbacks: 1. the thickness of the steel plate of the car body and the door plate is thinner, so that the nut is not easy to control when welded, the uniformity of the welded quality is poor, and the problems of off-welding, false welding and the like are easy to occur; 2. when the screw is welded, spark splashing is inevitably generated, and when the spark splashes to a threaded part, hard scars are formed after the screw is cooled, so that high resistance is encountered when a bolt/screw is driven, if a worker forcibly operates the screw, the nut can be loosened, particularly the nut in a car body and a door plate, once the nut is loosened, the function is lost, meanwhile, the fallen nut can interfere with other parts to generate abnormal sound, and the normal operation of other parts is influenced; in practical investigation, it is counted that at least 1 car body of the car body assembly is cut off the line and the nuts are welded again for the reasons described above, and the cutting and the re-welding of the nuts and the subsequent work are nonstandard work, so that the cost is greatly increased. The main defects of the punching flanging nut are as follows: the nut is only suitable for being fixed by a smaller nut, and once the nut needs to bear a slightly larger pulling force, the friction force generated by flanging is insufficient for supporting the installation of the fixing piece, so that the nut is generally suitable for the fixation of electronic devices.
The invention of China patent with the grant publication number of CN101839269B and the grant publication number of 2012/5/2 discloses a nut fixing member and a nut fixing structure, wherein the nut fixing structure comprises a nut, a connecting member and a nut fixing member, the nut fixing member comprises a plate-shaped main body, a connecting part positioned at one end of the plate-shaped main body and a mounting part positioned on the plate-shaped main body, the connecting part is used for being detachably connected to a part needing to be provided with the nut, the mounting part is used for being detachably provided with the nut, the connecting member is fixed or integrally formed on the part needing to be provided with the nut, a mounting hole which at least can penetrate through a bolt needing to be connected with the nut is formed at a position corresponding to the hole of the nut and the hole of the nut fixing member on the part needing to be provided with the nut, the nut is detachably mounted on the mounting part, and the connecting part is detachably connected to the connecting member. Although the invention does not need welding and is convenient to detach and replace, the invention still has the following defects: according to the invention, the nut is fixed on the connecting piece through the nut fixing piece, so that the structure is complex, and meanwhile, the nut is fixed only through the clamping pin on the nut fixing piece, so that the fixing reliability of the nut is low.
Disclosure of Invention
The invention aims to overcome the defects and problems of complex structure and low reliability in the prior art and provides a nut fixing structure with simple structure and high reliability and a manufacturing method thereof.
In order to achieve the above object, the technical solution of the present invention is: the nut fixing structure comprises a nut and a plate, wherein the nut is fixed on the plate;
the nut is of a convex structure, the nut comprises a nut body and a first boss arranged on the nut body, a threaded hole penetrating through the nut body and the first boss is formed in the center of the nut, a first groove is formed in a position, located between the outer wall of the nut body and the outer wall of the first boss, of the nut body, and the side wall of the first groove is obliquely arranged inwards;
the sheet metal is protruding structure, and the sheet metal includes the sheet metal body and goes up the boss No. two that set up on, no. two boss and recess riveting are connected, no. two boss's center is provided with the mounting hole that runs through No. two boss No. one, and the inner wall of mounting hole contacts with the outer wall of boss No. one.
And a second groove communicated with the first mounting hole is formed in the plate body.
The side wall of the second groove is arranged in an outward inclined mode.
The end face, far away from the nut body, of the first boss is provided with a second mounting hole, the second mounting hole is of a round table-shaped structure, the second mounting hole is concentric with the threaded hole, the small-diameter end of the second mounting hole is communicated with the threaded hole, and the large-diameter end of the second mounting hole extends to the end face of the first boss.
The plate material is made of low carbon steel.
A method of manufacturing a nut fixing structure, the method comprising the steps of, in order:
a. cold heading nut: firstly, cold heading a bar material with normalized 40Cr and Brinell hardness below HB160 to form a nut, then machining a threaded hole in the center of the nut, and then quenching and high-temperature tempering the machined nut to ensure that the hardness of the nut reaches HRC 40-42;
b. plate pressing boss: punching a second boss at the position of the plate where the nut needs to be fixed;
c. chamfering nuts: firstly, processing one surface of the nut which is cold-headed in the step a into a first groove matched with a second boss, and then inwards compressing the side wall of the first groove to form an inner buckle-shaped groove;
d. punching and riveting: the second boss is extruded into the first groove by the riveting die, so that the second boss is in interference fit with the first groove, and the purpose of riveting and fixing is achieved.
A second groove communicated with the first mounting hole is formed in the plate body;
the end face, far away from the nut body, of the first boss is provided with a second mounting hole, the second mounting hole is of a truncated cone-shaped structure, the second mounting hole is concentric with the threaded hole, the small diameter end of the second mounting hole is communicated with the threaded hole, and the large diameter end of the second mounting hole extends to the end face of the first boss;
the press riveting die comprises a die body, a round table matched with the second mounting hole is arranged in the middle of the die body, and a male die matched with the second groove is arranged at the periphery of the round table on the die body.
The plate material is made of low carbon steel.
Compared with the prior art, the invention has the beneficial effects that:
1. the nut comprises a nut body and a first boss arranged on the nut body, a first groove is formed in a position, located between the outer wall of the nut body and the outer wall of the first boss, of the nut body, the side wall of the first groove is arranged in an inward inclined mode, a plate is of a convex structure, the plate comprises a plate body and a second boss arranged on the plate body, the second boss is in riveting connection with the first groove, a first mounting hole penetrating through the second boss is formed in the center of the second boss, and the inner wall of the first mounting hole is in contact with the outer wall of the first boss. Therefore, the invention has simple structure and high reliability.
2. According to the nut fixing structure and the manufacturing method thereof, the second groove communicated with the first mounting hole is formed in the plate body, and the second groove is formed, so that the riveting die is positioned more accurately; the end face, far away from the nut body, of the first boss is provided with a second mounting hole, the second mounting hole is of a truncated cone-shaped structure, and the second mounting hole is arranged, so that the press riveting die is convenient to fix the nut and the plate together; the lateral wall of No. two recesses outwards inclines to set up for when the press riveting mould extrudeed No. two bosss, no. two bosss can be fine with No. one recess riveting be connected. Therefore, the invention has simple and convenient installation and high nut fixing quality.
3. According to the nut fixing structure and the manufacturing method thereof, the bar is cold-headed to form the nut, the boss is punched at the position of the plate where the nut needs to be fixed, the manufacturing material of the plate is low-carbon steel, one surface of the nut is processed into the groove matched with the boss, the side wall of the first groove is compressed inwards to form the inner buckling groove, and the boss is extruded into the groove by adopting the riveting die, so that the boss is in interference fit with the groove, and the purpose of riveting and fixing is achieved. Therefore, the invention has the advantages of simple manufacture, low manufacturing cost, high reliability and good torsion and tension resistance.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the nut of fig. 1.
Fig. 3 is a schematic view of the structure of the sheet material in fig. 1.
Fig. 4 is a schematic view of the structure of the present invention when assembled.
Fig. 5 is an enlarged view of a in fig. 4.
In the figure: nut 1, nut body 11, boss 12, screw hole 13, recess 14, lateral wall 141, mounting hole 15 No. two, sheet material 2, sheet material body 21, boss 22 No. two, mounting hole 23, recess 24 No. two, press riveting die 3, die body 31, round platform 32, terrace die 33.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 5, a nut fixing structure comprises a nut 1 and a plate 2, wherein the nut 1 is fixed on the plate 2;
the nut 1 is of a convex structure, the nut 1 comprises a nut body 11 and a first boss 12 arranged on the nut body, a threaded hole 13 penetrating through the nut body 11 and the first boss 12 is formed in the center of the nut 1, a first groove 14 is formed in the nut body 11 and located between the outer wall of the nut body 11 and the outer wall of the first boss 12, and a side wall 141 of the first groove 14 is obliquely arranged inwards;
the sheet metal 2 is protruding structure, and sheet metal 2 includes sheet metal body 21 and No. two bosss 22 that set up on it, no. two bosss 22 and No. one recess 14 riveting are connected, no. two boss 22's center is provided with the mounting hole 23 that runs through No. two boss 22, and the inner wall of mounting hole 23 contacts with the outer wall of No. one boss 12.
The plate body 21 is provided with a second groove 24 communicated with the first mounting hole 23.
The side wall of the second groove 24 is inclined outwards.
The end face, far away from the nut body 11, of the first boss 12 is provided with a second mounting hole 15, the second mounting hole 15 is of a truncated cone-shaped structure, the second mounting hole 15 is concentric with the threaded hole 13, the small diameter end of the second mounting hole 15 is communicated with the threaded hole 13, and the large diameter end of the second mounting hole 15 extends to the end face of the first boss 12.
The plate material 2 is made of low carbon steel.
A method of manufacturing a nut fixing structure, the method comprising the steps of, in order:
a. cold heading nut 1: firstly, cold heading a bar material with normalized 40Cr and Brinell hardness of less than HB160 to form a nut 1, then machining a threaded hole 13 in the center of the nut 1, and then quenching and high-temperature tempering the machined nut 1 to ensure that the hardness of the nut 1 reaches HRC 40-42;
b. plate material 2 presses boss: punching a second boss 22 at the position of the plate material 2 where the nut 1 needs to be fixed;
c. chamfering the nut 1: firstly, processing one surface of the nut 1 cold-headed in the step a into a first groove 14 matched with a second boss 22, and then inwards compressing the side wall 141 of the first groove 14 to form an inner buckle-shaped groove;
d. punching and riveting: the second boss 22 is extruded into the first groove 14 by the riveting die 3, so that the second boss 22 is in interference fit with the first groove 14, and the purpose of riveting and fixing is achieved.
A second groove 24 communicated with the first mounting hole 23 is formed in the plate body 21;
the end face of the first boss 12 far away from the nut body 11 is provided with a second mounting hole 15, the second mounting hole 15 is of a truncated cone-shaped structure, the second mounting hole 15 is concentric with the threaded hole 13, the small diameter end of the second mounting hole 15 is communicated with the threaded hole 13, and the large diameter end of the second mounting hole 15 extends to the end face of the first boss 12;
the press riveting die 3 comprises a die body 31, a round table 32 matched with the second mounting hole 15 is arranged in the middle of the die body 31, and a male die 33 matched with the second groove 24 is arranged at the periphery of the round table 32 on the die body 31.
The plate material 2 is made of low carbon steel.
The principle of the invention is explained as follows:
the design belongs to the fixing technology of nuts on automobiles, in particular to the fixing of nuts on automobile bodies, door inner plates and chassis structural members. The design aims to thoroughly solve the problem that a welded nut is easy to appear, improve the stability and uniformity of the nut fixing quality, avoid a series of follow-up problems caused by welding splashing, therefore, consider to radically change the fixing mode, give up the existing welding mode, and instead adopt a brand new fixing mode, and design a nut fixing mode of a press riveting structure. The nut plate pressed by the design completely avoids various problems caused by welding nuts, and the problems of welding slag splashing, cold joint and off-welding are avoided, so that the later-period generated compensation procedure is avoided, the cost of a single automobile body can be reduced by 1000 units according to estimation, the nut is more stable and reliable, the torsion resistance is improved to some extent, and the tensile property is improved by more than 40%.
Aiming at the design, an M8 vehicle body fixing nut is developed, and the detailed development steps are as follows: the concrete implementation is divided into three steps, namely, cold heading nuts and stamping plate bosses, then chamfering the edges of the nuts, and finally stamping and riveting, wherein the actual implementation is as follows: (1) cold heading nuts. A normalized 40Cr bar is selected, the Brinell hardness is less than HB160, a nut is formed by cold heading, then a threaded hole in the center of the nut is processed, and finally, integral tempering is carried out to reach HRC 40-42 for standby, wherein the tempering is a conventional heat treatment process in the heat treatment industry, and the basic steps are quenching and high-temperature tempering so as to obtain comprehensive mechanical properties with better strength, toughness and plasticity; (2) The plate presses the boss, the plate is usually made of low carbon steel, punch a boss with a certain shape at a position where the nut needs to be fixed, and the boss is used for riveting with the nut subsequently so as to play a role in fixing the nut; and (3) chamfering the nut. The cold-headed nut in the step (1) is formed with a groove matched with a plate boss on one surface, and the process of the step is to compress the edge of the groove inwards by a die to form a groove of an inner buckle; and (4) punching and riveting. The process adopts a press riveting die to extrude the plate boss into the inner buckling groove part of the nut to form negative clearance fit between the plate boss and the nut, thereby achieving the purpose of riveting and fixing. The anti-torsion performance of the press riveting nut developed by the embodiment reaches more than 40NM, meets the standard requirement of a nut plate, has the tensile performance reaching more than 45KN and exceeding 125% of the standard value of 20KN, and greatly improves the performance.
The chamfer position is the four sides of straight wall (the nut body is the cuboid structure, the boss No. one is the cylinder structure, of course nut body and boss No. one can also take other shapes in the practical application, as long as the reliability is high, make simple, simple to operate, torsion resistance tensile property good can the four sides inwards compress, form the inclined wall of shrink in adopting the mould. The chamfering process is a necessary process for smoothly implementing the nut pressing process, and the lug boss of the plate material in the pressing process is required to be pressed into the groove of the nut, and the negative gap pressing is formed due to the existence of the inclined wall of the nut, so that the nut is fixed. And (3) processing the groove, wherein the groove is formed by cold heading in actual production, and the groove is processed by a mechanical processing method in test.
Examples:
referring to fig. 1 to 5, a nut fixing structure comprises a nut 1 and a plate 2, wherein the nut 1 is fixed on the plate 2; the nut 1 is of a convex structure, the nut 1 comprises a nut body 11 and a first boss 12 arranged on the nut body, a threaded hole 13 penetrating through the nut body 11 and the first boss 12 is formed in the center of the nut 1, a first groove 14 is formed in the nut body 11 and located between the outer wall of the nut body 11 and the outer wall of the first boss 12, and a side wall 141 of the first groove 14 is obliquely arranged inwards; the plate material 2 is of a convex structure, the plate material 2 comprises a plate material body 21 and a second boss 22 arranged on the plate material body, the second boss 22 is in riveted connection with the first groove 14, a first mounting hole 23 penetrating through the second boss 22 is arranged in the center of the second boss 22, and the inner wall of the first mounting hole 23 is in contact with the outer wall of the first boss 12; a second groove 24 communicated with the first mounting hole 23 is formed in the plate body 21, and the side wall of the second groove 24 is inclined outwards; the end face, far away from the nut body 11, of the first boss 12 is provided with a second mounting hole 15, the second mounting hole 15 is of a truncated cone-shaped structure, the second mounting hole 15 is concentric with the threaded hole 13, the small diameter end of the second mounting hole 15 is communicated with the threaded hole 13, and the large diameter end of the second mounting hole 15 extends to the end face of the first boss 12.
According to the scheme, the manufacturing method of the nut fixing structure sequentially comprises the following steps of:
a. cold heading nut 1: firstly, cold heading a bar material with normalized 40Cr and Brinell hardness of less than HB160 to form a nut 1, then machining a threaded hole 13 in the center of the nut 1, and then quenching and high-temperature tempering the machined nut 1 to ensure that the hardness of the nut 1 reaches HRC 40-42;
b. plate material 2 presses boss: punching a second boss 22 at the position of the plate material 2 where the nut 1 needs to be fixed;
c. chamfering the nut 1: firstly, processing one surface of the nut 1 cold-headed in the step a into a first groove 14 matched with a second boss 22, and then inwards compressing the side wall 141 of the first groove 14 to form an inner buckle-shaped groove;
d. punching and riveting: the second boss 22 is extruded into the first groove 14 by the riveting die 3, so that the second boss 22 is in interference fit with the first groove 14, and the purpose of riveting and fixing is achieved.
Referring to fig. 4 and 5, the riveting die 3 includes a die body 31, a circular table 32 matched with the second mounting hole 15 is disposed in the middle of the die body 31, and a male die 33 matched with the second groove 24 is disposed on a portion of the die body 31 located at the periphery of the circular table 32.
The plate material 2 is made of low carbon steel.
Claims (3)
1. The manufacturing method of the nut fixing structure comprises a nut (1) and a plate (2), wherein the nut (1) is fixed on the plate (2), the nut (1) is of a convex structure, the nut (1) comprises a nut body (11) and a first boss (12) arranged on the nut body, a threaded hole (13) penetrating through the nut body (11) and the first boss (12) is formed in the center of the nut (1), a first groove (14) is formed in a position, located between the outer wall of the nut body (11) and the outer wall of the first boss (12), of the nut body (11), and a side wall (141) of the first groove (14) is obliquely arranged inwards; sheet material (2) are protruding structure, and sheet material (2) are including sheet material body (21) and No. two boss (22) that set up on it, no. two boss (22) are connected with recess (14) riveting, no. two the center of boss (22) is provided with a mounting hole (23) that runs through No. two boss (22), and the inner wall of a mounting hole (23) contacts with the outer wall of a boss (12), its characterized in that:
the manufacturing method sequentially comprises the following steps:
a. cold heading nut (1): firstly, cold heading a bar material with normalized 40Cr and Brinell hardness of less than HB160 to form a nut (1), then machining a threaded hole (13) in the center of the nut (1), and then quenching and high-temperature tempering the machined nut (1) to ensure that the hardness of the nut (1) reaches HRC 40-42;
b. pressing boss of plate (2): punching a second boss (22) at the position of the plate material (2) where the nut (1) needs to be fixed;
c. chamfering of the nut (1): firstly, processing one surface of the nut (1) which is cold-headed in the step a into a first groove (14) matched with a second boss (22), and then inwards compressing the side wall (141) of the first groove (14) to form an inner buckle-shaped groove;
d. punching and riveting: and the second boss (22) is extruded into the first groove (14) by adopting the riveting die (3) so that the second boss (22) is in interference fit with the first groove (14), and the purpose of riveting and fixing is achieved.
2. The method of manufacturing a nut fixing structure according to claim 1, characterized in that:
a second groove (24) communicated with the first mounting hole (23) is formed in the plate body (21);
the end face, far away from the nut body (11), of the first boss (12) is provided with a second mounting hole (15), the second mounting hole (15) is of a truncated cone-shaped structure, the second mounting hole (15) is concentric with the threaded hole (13), the small diameter end of the second mounting hole (15) is communicated with the threaded hole (13), and the large diameter end of the second mounting hole (15) extends to the end face of the first boss (12);
the press riveting die (3) comprises a die body (31), a round table (32) matched with the second mounting hole (15) is arranged in the middle of the die body (31), and a male die (33) matched with the second groove (24) is arranged at the periphery of the round table (32) on the die body (31).
3. The method of manufacturing a nut fixing structure according to claim 1, characterized in that: the plate (2) is made of low-carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939299.0A CN107939809B (en) | 2017-09-30 | 2017-09-30 | Nut fixing structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939299.0A CN107939809B (en) | 2017-09-30 | 2017-09-30 | Nut fixing structure and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107939809A CN107939809A (en) | 2018-04-20 |
| CN107939809B true CN107939809B (en) | 2023-05-30 |
Family
ID=61936114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710939299.0A Active CN107939809B (en) | 2017-09-30 | 2017-09-30 | Nut fixing structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107939809B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570369A (en) * | 2018-10-10 | 2019-04-05 | 上海奥林汽车配件有限公司 | A kind of technique improving nut riveting performance |
| CN109424610B (en) * | 2018-11-15 | 2023-07-25 | 宾科精密部件(中国)有限公司 | Press riveting piece |
| CN110541880B (en) * | 2019-09-11 | 2021-11-02 | 上海纳特汽车标准件有限公司 | Rivet turning nut and combination of rivet turning nut and plate |
| CN114033776B (en) * | 2021-12-01 | 2022-08-05 | 北京交通大学 | Connecting element and connecting method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710246A1 (en) * | 1997-03-12 | 1998-09-17 | Profil Verbindungstechnik Gmbh | Element and method for inserting the element into a plate-shaped component |
| CN102009103B (en) * | 2010-10-27 | 2013-09-04 | 襄阳东昇机械有限公司 | Continuous punching and nut riveting device for automobile door lock catch |
| CN202732616U (en) * | 2012-08-21 | 2013-02-13 | 德韧干巷汽车系统（上海）有限公司 | Riveting nut |
| CN202883645U (en) * | 2012-10-31 | 2013-04-17 | 浙江长华汽车零部件有限公司 | Pressing nut |
| CN203879895U (en) * | 2014-05-20 | 2014-10-15 | 深圳市格雷特通讯科技有限公司 | Non-standard nut and riveting component comprising same |
| CN104227358A (en) * | 2014-09-16 | 2014-12-24 | 浙江新东方汽车零部件有限公司 | Production technology for nut special for commercial vehicle |
| CN106984757A (en) * | 2016-01-21 | 2017-07-28 | 东莞市展赐精密五金制品厂 | Treasure maesa herb self-clinching nut processing technology |
| CN207598689U (en) * | 2017-09-30 | 2018-07-10 | 东风商用车有限公司 | A kind of nut fixed structure |
-
2017
- 2017-09-30 CN CN201710939299.0A patent/CN107939809B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107939809A (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107939809B (en) | Nut fixing structure and manufacturing method thereof | |
| KR20010042701A (en) | Process for manufacturing a captive screw | |
| CN114054586A (en) | Punch forming process for large-area hyperbolic mirror surface stainless steel plate | |
| CN102052377A (en) | Bolt for panel combination and panel combination method using the same | |
| CN201573519U (en) | Mounting plate structure for vehicle side door hinge | |
| CN207598689U (en) | A kind of nut fixed structure | |
| KR20080078118A (en) | Manufacture method of nut by rolling steel plate foming | |
| CN214625209U (en) | Section bar for battery pack framework | |
| CN217452769U (en) | Welding positioning forming tool | |
| CN105750461A (en) | Auxiliary mount for thread rolling flat die | |
| CN108747301B (en) | Ultra-thin plate riveting nut or riveting screw device and riveting method thereof | |
| CN215786473U (en) | Friction press friction block reuse device | |
| CN217945380U (en) | Fender connecting plate assembly fixture structure | |
| CN210754735U (en) | Rivet-free riveting equipment for automobile oil filling pipe | |
| CN220204338U (en) | Nut riveting structure of battery hardware connecting piece | |
| CN204366392U (en) | A kind of screw nut hydraulic riveting equipment | |
| CN111531045B (en) | Metal piece riveting process | |
| CN212220371U (en) | Automobile longitudinal beam end plate | |
| CN216102428U (en) | Integrated platform floor structure | |
| CN220387626U (en) | High-strength automobile side punching die | |
| CN220880286U (en) | Combined cross screw stamping die | |
| CN211540069U (en) | Welding fixture for manufacturing main rib of fan mesh enclosure | |
| JPH06226394A (en) | Method and device for thick forming of annular body | |
| CN218934979U (en) | Press riveting nut | |
| CN218425125U (en) | Reduce thick plate tapping screw tap rupture structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |