CN114183449A - Combined welding bolt assembly and preparation method thereof - Google Patents
Combined welding bolt assembly and preparation method thereof Download PDFInfo
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- CN114183449A CN114183449A CN202210020173.4A CN202210020173A CN114183449A CN 114183449 A CN114183449 A CN 114183449A CN 202210020173 A CN202210020173 A CN 202210020173A CN 114183449 A CN114183449 A CN 114183449A
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- nut
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- 238000003466 welding Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000005406 washing Methods 0.000 claims description 36
- 239000011265 semifinished product Substances 0.000 claims description 30
- 239000000047 product Substances 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 18
- 238000005554 pickling Methods 0.000 claims description 18
- 238000004381 surface treatment Methods 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 229910052719 titanium Inorganic materials 0.000 claims description 12
- 239000010936 titanium Substances 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000010622 cold drawing Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
-
- 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
-
- 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
- F16B37/061—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of bolts, in particular to a combined welding bolt assembly and a preparation method thereof. The utility model provides a modular welding bolt subassembly which characterized in that: the bolt is connected with the nut through threads and a washer; the bottom connecting screw rod of bolt head is located the outer fringe of screw rod and is equipped with the external screw thread, is located the head connection plane flange structure of bolt head, and plane flange structure is trapezoidal disc structure for the cross-section to the top and the bottom of plane flange structure are circular plane respectively, and the bottom of plane flange structure is connected with the top of bolt head, and the lower part connecting bolt flange of bolt head is located the top coupling nut flange of nut, the upper portion of nut be the cylinder structure, the lower part of nut is hexagon column structure. Compared with the prior art, the structure of the welding bolt is improved, and the combined bolt can increase the contact surface and ensure the connection stability of the grounding wire while meeting the grounding function.
Description
Technical Field
The invention relates to the technical field of bolts, in particular to a combined welding bolt assembly and a preparation method thereof.
Background
At present, with the rise of electric automobiles, the safety problem of the electric automobiles becomes more and more important, and how to ensure that current is led out of an automobile body in time under the condition of battery leakage is important, so that secondary damage to users is avoided. By using the principle of the grounding wire of the household appliance for reference, when the battery is leaked, the current can be timely guided to the ground through the grounding wire. In addition, since the automobile is in a vibration state for a long time during running, the ground lead is easily loosened or poor in contact. Therefore, the combined bolt can increase the contact surface and ensure the connection stability of the grounding lead while meeting the grounding function.
Disclosure of Invention
The invention provides a combined type welding bolt assembly and a preparation method thereof for overcoming the defects of the prior art, the structure of the welding bolt is improved, and the combined type welding bolt can increase the contact surface and ensure the connection stability of a grounding lead while meeting the grounding function.
In order to realize the above purpose, a combined welding bolt assembly is designed, which comprises a nut and a bolt, and is characterized in that: the bolt is connected with the nut through threads and a washer; the bolt comprises a bolt head and a screw rod, the bottom of the bolt head is connected with the screw rod, an external thread is arranged on the outer edge of the screw rod, the head of the bolt head is connected with a plane flange structure, the plane flange structure is a disc-shaped structure with a trapezoidal section, the top and the bottom of the plane flange structure are respectively circular planes, the bottom of the plane flange structure is connected with the top of the bolt head, and the lower part of the bolt head is connected with a bolt flange; the inner side of the nut is provided with internal threads, the nut flange is connected to the top of the nut, the upper portion of the nut is of a cylindrical structure, and the lower portion of the nut is of a hexagonal columnar structure.
The diameter of the top plane of the plane flange structure is 20% of the diameter of the bottom of the plane flange structure, and the inclination of the plane flange structure is 3 degrees.
The diameter of the bolt flange is larger than that of the bolt head.
The plane flange structure of the bolt flange and the bolt head are of an integral structure.
The bottom of the washer and the bottom of the nut are connected in a welding mode or the bottom of the washer and the bottom of the nut are of an integrated structure.
The gasket is a flat gasket.
A combined welding bolt assembly and a preparation method thereof are characterized in that: the specific method comprises the following steps:
s1: cold drawing: the raw materials of the nut and the bolt are made into a nut blank and a bolt blank by a cold drawing process;
s2: cold heading: the nut blank and the bolt blank are respectively formed by cold heading through a group of cold heading dies;
s3: thread rolling: thread rolling the cold-headed and formed nut semi-finished product and bolt semi-finished product to form internal threads and external threads;
s4: surface treatment: respectively carrying out surface treatment on the nut semi-finished product and the bolt semi-finished product after thread rolling to obtain a nut finished product and a bolt finished product;
s5: lubrication: respectively lubricating the nut finished product and the bolt finished product after surface treatment by adopting an infiltration lubricant, wherein the lubricant is DF 921;
s6: press fitting: pressing the lubricated nut finished product and a gasket;
s7: assembling: and assembling the pressed nut finished product and the bolt finished product.
The specific flow of the bolt surface treatment in step S4 is as follows:
s411: degreasing, spraying and cleaning the semi-finished bolt in a cleaning tank, and drying at the cleaning temperature of 60 +/-10 ℃ for 5-10 min;
s412: placing the degreased and spray-cleaned semi-finished bolt product into a pickling tank for pickling, wherein the pickling time is 30 +/-5 s, and the concentration ratio of sulfuric acid is 5 +/-2 ml/L;
s413: putting the pickled bolt semi-finished product into a washing tank for pure water washing, wherein the washing temperature is room temperature and the washing time is 20 +/-5 s;
s414: placing the cleaned bolt semi-finished product into a titanium conversion tank for titanium conversion treatment, wherein the titanium conversion time is 60 +/-30 s, the titanium conversion liquid medicine is 2040-R2, the proportion is 18 +/-2 ml/L, and the temperature is 40 +/-10 ℃;
s415: and (3) putting the semi-finished product of the titanium-converted bolt into a water washing tank for pure water washing twice, and then centrifugally drying at room temperature for 5 +/-2 s at 90 +/-10 ℃ for 3 +/-1 min at the drying centrifugal rotation speed of 350 +/-50 rpm.
The specific flow of the nut surface treatment in step S4 is as follows:
s421: washing the nut semi-finished product in a washing tank at room temperature for 10 +/-5 seconds;
s422: placing the washed nut semi-finished product into a pickling tank for pickling, wherein the pickling time is 15 +/-2 min, the concentration ratio of nitric acid is 300ml/L, and the temperature is room temperature;
s423: and (3) putting the pickled nut semi-finished product into a washing tank for pure washing twice, and then drying, wherein the washing temperature is room temperature, the washing time is 10 +/-5 s, the drying temperature is 90 +/-10 ℃, and the drying time is 15 +/-5 min.
The cold heading die comprises a nut cold heading die and a bolt cold heading die.
Compared with the prior art, the combined type welding bolt assembly and the preparation method thereof provided by the invention have the advantages that the structure of the welding bolt is improved, the combined type welding bolt can meet the grounding function, and meanwhile, the contact surface can be increased and the connection stability of a grounding wire can be ensured.
Drawings
FIG. 1 is a schematic view of a bolt assembly of the present invention.
Fig. 2 is a front view of the bolt assembly of the present invention.
Fig. 3 is a schematic view of a bolt structure in the bolt assembly.
Fig. 4 is a front view of a bolt structure in the bolt assembly.
Fig. 5 is a front view of a bolt structure in the bolt assembly.
Fig. 6 is a schematic view of a nut structure in the bolt assembly.
Fig. 7 is a schematic structural view of a nut cold heading die.
FIG. 8 is a schematic structural view of a bolt cold heading die.
Fig. 9 is a schematic view of an application scenario of the present invention.
FIG. 10 is a table of the results of the tests of the present invention.
FIG. 11 is a breaking torque graph of the present invention.
FIG. 12 is a graph of the release torque of the present invention.
Referring to fig. 1 to 6, 1 is a bolt, 1-1 is a bolt head, 1-2 is a connecting screw, 1-3 is an external thread, 1-4 is a plane flange structure, 1-5 is a bolt flange, 2 is a nut, 2-1 is an internal thread, 2-2 is a nut flange, and 3 is a washer.
Referring to fig. 9, 4 is a ground line, and 5 is a bonding pad.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawings.
As shown in fig. 1 to 6, a bolt 1 is connected with a nut 2 through a thread and a washer 3; the bolt 1 comprises a bolt head 1-1 and a screw rod 1-2, the bottom of the bolt head 1-1 is connected with the screw rod 1-2, an external thread 1-3 is arranged on the outer edge of the screw rod 1-2, the head of the bolt head 1-1 is connected with a plane flange structure 1-4, the plane flange structure 1-4 is a disc-shaped structure with a trapezoidal section, the top and the bottom of the plane flange structure 1-4 are respectively a circular plane, the bottom of the plane flange structure 1-4 is connected with the top of the bolt head 1-1, and the lower part of the bolt head 1-1 is connected with a bolt flange 1-5; the inner side of the nut 2 is provided with internal threads 2-1, the nut flange 2-2 is connected to the top of the nut 2, the upper portion of the nut 2 is of a cylindrical structure, and the lower portion of the nut 2 is of a hexagonal cylindrical structure.
The diameter of the top plane of the plane flange structure 1-4 is 20% of the diameter of the bottom of the plane flange structure 1-4, and the inclination of the plane flange structure 1-4 is 3 degrees.
The diameter of the bolt flange 1-5 is larger than the diameter of the bolt head 1-1.
The plane flange structure 1-4 of the bolt flange 1-5 and the bolt head 1-1 are of an integral structure.
The washer 3 is connected with the bottom of the nut 2 by welding or the washer 3 and the bottom of the nut 2 are of an integral structure.
The washer 3 is a flat washer.
A preparation method of a combined welding bolt comprises the following specific steps:
s1: cold drawing: the raw materials of the nut and the bolt are made into a nut blank and a bolt blank by a cold drawing process;
s2: cold heading: the nut blank and the bolt blank are respectively formed by cold heading through a group of cold heading dies;
s3: thread rolling: thread rolling the cold-headed and formed nut semi-finished product and bolt semi-finished product to form internal threads and external threads;
s4: surface treatment: respectively carrying out surface treatment on the nut semi-finished product and the bolt semi-finished product after thread rolling to obtain a nut finished product and a bolt finished product;
s5: lubrication: respectively lubricating the nut finished product and the bolt finished product after surface treatment by adopting an infiltration lubricant, wherein the lubricant is DF 921;
s6: press fitting: pressing the lubricated nut finished product and a gasket;
s7: assembling: and assembling the pressed nut finished product and the bolt finished product.
The concrete flow of the bolt surface treatment in step S4 is as follows:
s411: degreasing, spraying and cleaning the semi-finished bolt in a cleaning tank, and drying at the cleaning temperature of 60 +/-10 ℃ for 5-10 min;
s412: placing the degreased and spray-cleaned semi-finished bolt product into a pickling tank for pickling, wherein the pickling time is 30 +/-5 s, and the concentration ratio of sulfuric acid is 5 +/-2 ml/L;
s413: putting the pickled bolt semi-finished product into a washing tank for pure water washing, wherein the washing temperature is room temperature and the washing time is 20 +/-5 s;
s414: placing the cleaned bolt semi-finished product into a titanium conversion tank for titanium conversion treatment, wherein the titanium conversion time is 60 +/-30 s, the titanium conversion liquid medicine is 2040-R2, the proportion is 18 +/-2 ml/L, and the temperature is 40 +/-10 ℃;
s415: and (3) putting the semi-finished product of the titanium-converted bolt into a water washing tank for pure water washing twice, and then centrifugally drying at room temperature for 5 +/-2 s at 90 +/-10 ℃ for 3 +/-1 min at the drying centrifugal rotation speed of 350 +/-50 rpm.
The specific flow of the nut surface treatment in step S4 is as follows:
s421: washing the nut semi-finished product in a washing tank at room temperature for 10 +/-5 seconds;
s422: placing the washed nut semi-finished product into a pickling tank for pickling, wherein the pickling time is 15 +/-2 min, the concentration ratio of nitric acid is 300ml/L, and the temperature is room temperature;
s423: and (3) putting the pickled nut semi-finished product into a washing tank for pure washing twice, and then drying, wherein the washing temperature is room temperature, the washing time is 10 +/-5 s, the drying temperature is 90 +/-10 ℃, and the drying time is 15 +/-5 min.
The cold heading die comprises a nut cold heading die and a bolt cold heading die. As shown in fig. 7 and 8.
As shown in fig. 9, the head of the processed bolt 1 is downward and stands on the welding plate 5, and the top of the plane flange structure 1-4 of the bolt 1 is a plane, but the head of the common bolt is not a sharp point structure, so the bolt 1 of the invention can be stably inverted on the welding plate 5, then the grounding wire 4 is contacted with the bolt 1 and electrified, and the head of the bolt 1 generates heat after electrified, and the plane flange structure 1-4 is instantly melted and welded on the welding plate 5. After welding, the grounding wire 4 is taken away, and the nut 2 is screwed with the screw 1-2 of the bolt 1.
As shown in fig. 10, the present invention is a schematic diagram of the detection results obtained by a plurality of tests, and the results are qualified.
As shown in FIG. 11, the present invention was tested for breaking torque several times, and the results showed that the required range was achieved.
As shown in FIG. 12, the results of the present invention through a plurality of loosening torque tests show that the required range can be achieved.
Claims (10)
1. The utility model provides a modular welding bolt subassembly, includes nut, bolt, its characterized in that: the bolt (1) is connected with the nut (2) through threads and a washer (3); the bolt (1) comprises a bolt head (1-1) and a screw rod (1-2), the bottom of the bolt head (1-1) is connected with the screw rod (1-2), an external thread (1-3) is arranged on the outer edge of the screw rod (1-2), the head of the bolt head (1-1) is connected with a plane flange structure (1-4), the plane flange structure (1-4) is of a disc-shaped structure with a trapezoidal section, the top and the bottom of the plane flange structure (1-4) are respectively a circular plane, the bottom of the plane flange structure (1-4) is connected with the top of the bolt head (1-1), and the lower part of the bolt head (1-1) is connected with a bolt flange (1-5); the inner side of the nut (2) is provided with internal threads (2-1), the top of the nut (2) is connected with a nut flange (2-2), the upper part of the nut (2) is of a cylindrical structure, and the lower part of the nut (2) is of a hexagonal cylindrical structure.
2. The modular weld bolt assembly of claim 1, wherein: the diameter of the top plane of the plane flange structure (1-4) is 20% of the diameter of the bottom of the plane flange structure (1-4), and the inclination of the plane flange structure (1-4) is 3 degrees.
3. The modular weld bolt assembly of claim 1, wherein: the diameter of the bolt flange (1-5) is larger than that of the bolt head (1-1).
4. The modular weld bolt assembly of claim 1, wherein: the plane flange structure (1-4) of the bolt flange (1-5) and the bolt head (1-1) are of an integral structure.
5. The modular weld bolt assembly of claim 1, wherein: the bottom of the washer (3) and the bottom of the nut (2) are connected by welding or the bottom of the washer (3) and the bottom of the nut (2) are of an integral structure.
6. The modular weld bolt assembly of claim 1, wherein: the gasket (3) is a flat gasket.
7. A preparation method of a combined welding bolt assembly is characterized by comprising the following steps: the specific method comprises the following steps:
s1: cold drawing: the raw materials of the nut and the bolt are made into a nut blank and a bolt blank by a cold drawing process;
s2: cold heading: the nut blank and the bolt blank are respectively formed by cold heading through a group of cold heading dies;
s3: thread rolling: thread rolling the cold-headed and formed nut semi-finished product and bolt semi-finished product to form internal threads and external threads;
s4: surface treatment: respectively carrying out surface treatment on the nut semi-finished product and the bolt semi-finished product after thread rolling to obtain a nut finished product and a bolt finished product;
s5: lubrication: respectively lubricating the nut finished product and the bolt finished product after surface treatment by adopting an infiltration lubricant, wherein the lubricant is DF 921;
s6: press fitting: pressing the lubricated nut finished product and a gasket;
s7: assembling: and assembling the pressed nut finished product and the bolt finished product.
8. The method of making a modular weld bolt assembly according to claim 7, wherein: the specific flow of the bolt surface treatment in step S4 is as follows:
s411: degreasing, spraying and cleaning the semi-finished bolt in a cleaning tank, and drying at the cleaning temperature of 60 +/-10 ℃ for 5-10 min;
s412: placing the degreased and spray-cleaned semi-finished bolt product into a pickling tank for pickling, wherein the pickling time is 30 +/-5 s, and the concentration ratio of sulfuric acid is 5 +/-2 ml/L;
s413: putting the pickled bolt semi-finished product into a washing tank for pure water washing, wherein the washing temperature is room temperature and the washing time is 20 +/-5 s;
s414: placing the cleaned bolt semi-finished product into a titanium conversion tank for titanium conversion treatment, wherein the titanium conversion time is 60 +/-30 s, the titanium conversion liquid medicine is 2040-R2, the proportion is 18 +/-2 ml/L, and the temperature is 40 +/-10 ℃;
s415: and (3) putting the semi-finished product of the titanium-converted bolt into a water washing tank for pure water washing twice, and then centrifugally drying at room temperature for 5 +/-2 s at 90 +/-10 ℃ for 3 +/-1 min at the drying centrifugal rotation speed of 350 +/-50 rpm.
9. The method of making a modular weld bolt assembly according to claim 7, wherein: the specific flow of the nut surface treatment in step S4 is as follows:
s421: washing the nut semi-finished product in a washing tank at room temperature for 10 +/-5 seconds;
s422: placing the washed nut semi-finished product into a pickling tank for pickling, wherein the pickling time is 15 +/-2 min, the concentration ratio of nitric acid is 300ml/L, and the temperature is room temperature;
s423: and (3) putting the pickled nut semi-finished product into a washing tank for pure washing twice, and then drying, wherein the washing temperature is room temperature, the washing time is 10 +/-5 s, the drying temperature is 90 +/-10 ℃, and the drying time is 15 +/-5 min.
10. The method of making a modular weld bolt assembly according to claim 7, wherein: the cold heading die comprises a nut cold heading die and a bolt cold heading die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020173.4A CN114183449A (en) | 2022-01-10 | 2022-01-10 | Combined welding bolt assembly and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020173.4A CN114183449A (en) | 2022-01-10 | 2022-01-10 | Combined welding bolt assembly and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114183449A true CN114183449A (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210020173.4A Pending CN114183449A (en) | 2022-01-10 | 2022-01-10 | Combined welding bolt assembly and preparation method thereof |
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| Country | Link |
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| CN (1) | CN114183449A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004019153U1 (en) * | 2004-12-10 | 2005-02-10 | Böllhoff Verbindungstechnik GmbH | Screw connection with tolerance compensation |
| WO2007094089A1 (en) * | 2006-02-16 | 2007-08-23 | Yoshitaka Aoyama | Bolt for projection welding and method of welding the same |
| CN201802732U (en) * | 2010-08-04 | 2011-04-20 | 石娜 | Special locking nut for subway elastic bar |
| CN103912562A (en) * | 2014-03-27 | 2014-07-09 | 上海上标汽车紧固件有限公司 | Grounding weld bolt assembly for sheets with thicknesses equal to or larger than 0.6mm |
| CN103924229A (en) * | 2014-04-29 | 2014-07-16 | 无锡铱美特科技有限公司 | Aluminum alloy surface titanium dioxide conversion coating solution and using method thereof |
| CN109681507A (en) * | 2018-12-29 | 2019-04-26 | 无锡井上华光汽车部件有限公司 | A kind of nonstandard nut bolt structure and its processing technology |
| CN217002600U (en) * | 2022-01-10 | 2022-07-19 | 日泰（上海）汽车标准件有限公司 | Combined welding bolt assembly with plane flange structure |
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2022
- 2022-01-10 CN CN202210020173.4A patent/CN114183449A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004019153U1 (en) * | 2004-12-10 | 2005-02-10 | Böllhoff Verbindungstechnik GmbH | Screw connection with tolerance compensation |
| WO2007094089A1 (en) * | 2006-02-16 | 2007-08-23 | Yoshitaka Aoyama | Bolt for projection welding and method of welding the same |
| CN201802732U (en) * | 2010-08-04 | 2011-04-20 | 石娜 | Special locking nut for subway elastic bar |
| CN103912562A (en) * | 2014-03-27 | 2014-07-09 | 上海上标汽车紧固件有限公司 | Grounding weld bolt assembly for sheets with thicknesses equal to or larger than 0.6mm |
| CN103924229A (en) * | 2014-04-29 | 2014-07-16 | 无锡铱美特科技有限公司 | Aluminum alloy surface titanium dioxide conversion coating solution and using method thereof |
| CN109681507A (en) * | 2018-12-29 | 2019-04-26 | 无锡井上华光汽车部件有限公司 | A kind of nonstandard nut bolt structure and its processing technology |
| CN217002600U (en) * | 2022-01-10 | 2022-07-19 | 日泰（上海）汽车标准件有限公司 | Combined welding bolt assembly with plane flange structure |
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