Production process of waterproof and leakproof pull-rivet nut

Abstract

The application relates to the technical field of fastener production, and particularly discloses a production process of a waterproof and leakage-proof pull rivet nut, which comprises the following steps: S1, material selection; S2, wire drawing; S3, cold upsetting; S4, tapping; S5, quenching; S6, tempering; S7, surface treatment: performing rust-proof treatment on the heat-treated pull rivet nut; S8, screening and transferring: transferring the rust-proof treated pull rivet nut to a vibrating disc for screening, making the flange part of the screened pull rivet nut face upward, and transferring the pull rivet nut in batches to a feeding mechanism; S9, glue dispensing: moving the pull rivet nut on the feeding mechanism to a glue dispensing mechanism, and centrally dispensing glue on the glue dispensing part of the pull rivet nut by using the glue dispensing mechanism. The application has the effect of improving the low production process operation efficiency of the glue dispensing on the pull rivet nut in the production process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fastener production, in particular to a waterproof and leakproof pull-rivet nut production process. BACKGROUND

[0002] The pull-rivet nut is developed to solve the problems of easy melting of a welded nut of a metal sheet or a thin pipe and easy slipping of an internal thread of the nut, and does not need to tap an internal thread, does not need to weld a nut, is firmly riveted, is high in efficiency and is convenient to use.

[0003] When the pull-rivet nut is applied to the new energy automobile direction, the pull-rivet nut needs to be dispensing processed in the production process of the pull-rivet nut. The pull-rivet nut comprises a flange part and a pull-cap part, and a sink groove is formed in the surface center of the flange part along the length direction of the flange part.

[0004] In the related art, when the pull-rivet nut is dispensing processed, the pull-rivet nut is placed on a dispensing table arranged horizontally, a plurality of positioning blocks are fixed on the dispensing table at intervals, the plurality of positioning blocks are arranged in a rectangular array, the flange part of the pull-rivet nut faces downward during dispensing, and the positioning blocks are inserted into the sink groove of the flange part to fix the pull-rivet nut, and then an automatic dispensing machine is used to identify the position of the pull-rivet nut and to dispense the step surface of the flange part and the pull-cap part of each pull-rivet nut.

[0005] However, during actual dispensing, the pull-rivet nut needs to be inserted into the positioning blocks one by one, and the pull-rivet nut also needs to be taken down one by one after dispensing is completed, which leads to time and labor consumption and low efficiency during batch dispensing of the pull-rivet nut, and therefore needs to be improved. SUMMARY

[0006] In order to improve the problem of low production process operation efficiency of dispensing of the pull-rivet nut in the production process of the pull-rivet nut, the application provides a waterproof and leakproof pull-rivet nut production process.

[0007] The waterproof and leakproof pull-rivet nut production process provided by the application adopts the following technical scheme:

[0008] A waterproof and leakproof pull-rivet nut production process comprises the following steps:

[0009] S1: material selection: selecting a suitable blank material;

[0010] S2: wire drawing: drawing the blank material into a shape through a wire drawing machine;

[0011] S3: cold upsetting: cold upsetting the drawn profile through a cold upsetting machine, so as to obtain a pull-rivet nut;

[0012] S4: tapping: tapping the pull-rivet nut by using a tapping machine;

[0013] S5: quenching: quenching the shaped pull-rivet nut in a heating furnace;

[0014] S6: tempering: tempering the quenched rivet nut;

[0015] S7: surface treatment: rust-proof treatment is performed on the heat-treated rivet nut;

[0016] S8: screening and transferring: the rust-proof treated rivet nut is transferred to a vibrating disc for screening, so that the flange part of the screened rivet nut faces upward, and the rivet nuts are transferred to the feeding mechanism in batches;

[0017] S9: dispensing: the rivet nuts on the feeding mechanism are moved to the dispensing mechanism, and the positions of the dispensing parts of the rivet nuts are concentrated and dispensed in batches by using the dispensing mechanism.

[0018] By adopting the above technical scheme, when the rivet nut is produced, the rivet nut is preliminarily processed after material selection, wire drawing, cold upsetting, tapping, quenching, tempering and surface treatment, and then the rivet nut is screened in batches, so that the flange part of the rivet nut at the discharge port of the vibrating disc faces upward, and then the rivet nut falls from the discharge port to the feeding mechanism, and then the rivet nuts on the feeding mechanism are transferred to the dispensing mechanism for batch dispensing. This batch feeding mode saves feeding time, improves feeding efficiency, and saves manpower.

[0019] Optionally, the feeding mechanism comprises a placement table and a feeding disc located on the placement table and corresponding to the discharge port of the vibrating disc, a plurality of feeding holes are formed on the surface of the feeding disc along the height direction thereof, and the diameter of the feeding hole is not less than the diameter of the pull-cap part.

[0020] By adopting the above technical scheme, when screening is performed by using the vibrating disc, the feeding holes of the feeding disc are corresponded to the discharge port of the vibrating disc, so that the pull-cap part of the rivet nut passes through the feeding hole. When the feeding holes in the feeding disc all contain the rivet nuts, the feeding disc is transferred to realize batch transfer of the rivet nuts.

[0021] Optionally, the feeding disc is provided with an elastic limiting piece corresponding to the pull-cap part for limiting the pull-cap part from slipping out of the feeding hole, and the placement table is further provided with a first pressing assembly for pressing the rivet nuts on the feeding disc into the corresponding limiting cavities in batches.

[0022] By adopting the above technical scheme, when each feeding hole contains a rivet nut, the first pressing assembly is used to press the plurality of rivet nuts in batches, so that the flange part of the rivet nut is limited by the elastic limiting piece and cannot slip out of the feeding hole, thereby facilitating subsequent overturning of the feeding disc to make the rivet nuts fall for batch dispensing operation. The elastic limiting piece is arranged to limit the rivet nut, thereby improving the stability of the rivet nut.

[0023] Optionally, the elastic limiting piece comprises an elastic limiting cover arranged on the upper disc around the upper feeding hole, a through hole is arranged on the top surface of the elastic limiting cover, the elastic limiting cover and the upper disc form an open limiting cavity for accommodating the flange part, the inner diameter of the through hole is not less than the inner diameter of the groove, and the inner diameter of the through hole is less than the diameter of the flange part.

[0024] When the first pressing assembly presses the flange part, the flange part is pressed to move into the corresponding open limiting cavity.

[0025] By adopting the above technical scheme, when the first pressing assembly is pressed, the elastic limiting cover is deformed and recessed inward until it is attached to the inner wall of the elastic limiting cover. At this time, the flange part of the rivet nut is in the cavity of the elastic limiting cover. When the first pressing assembly is reset, the elastic limiting cover is reset under the action of its own elastic force. The inner diameter of the reset elastic limiting cover is less than the inner diameter of the flange part, thereby limiting the flange part. The structure is simple and convenient to operate, and batch limiting of multiple rivet nuts is realized.

[0026] Optionally, the dispensing mechanism comprises a dispensing table, a dispensing machine and a plurality of positioning blocks corresponding to the number of upper feeding holes arranged on the dispensing table, the positioning blocks are matched with the grooves of the flange parts of the rivet nuts, and the arrangement positions of the plurality of positioning blocks are consistent with the arrangement positions of the upper feeding holes. A second pressing assembly for inserting a plurality of rivet nuts on the upper disc into the corresponding positioning blocks is arranged above the dispensing table.

[0027] By adopting the above technical scheme, after the rivet nuts on the upper disc are limited, the upper disc is turned over, the cap part of the rivet nut faces upward, then the upper disc is arranged opposite to the dispensing table, and the rivet nut is inserted into the corresponding positioning block. At this time, the second pressing assembly acts on each rivet nut to limit the vertical movement of the rivet nut, and then the upper disc is lifted. The above process realizes batch feeding of the rivet nuts to be dispensed, improves the work efficiency, and improves the problem of low production process operation efficiency of dispensing the rivet nuts in the production process of the rivet nuts.

[0028] Optionally, the second pressing assembly comprises a second air cylinder and a horizontal discharging plate arranged on the telescopic end of the second air cylinder, and the discharging plate is in movable abutment with the cap part on the upper disc.

[0029] By adopting the technical scheme, the second cylinder drives the stripping plate to move linearly, the stripping plate is first in abutment with the pull cap part of the pull rivet nut when moving downward, and then the upper feeding disc is lifted, when the upper feeding disc is in abutment with the stripping plate, it means that the pull rivet nut has been successfully stripped, at this time, the second cylinder drives the stripping plate to reset, shifts the upper feeding disc, and the glue dispenser performs batch dispensing on the pull rivet nut, the above batch feeding and batch dispensing manner greatly improves the work efficiency, and improves the problem of low production process operation efficiency of dispensing the pull rivet nut in the production process.

[0030] Optionally, an electromagnetic sheet is arranged on the side of the stripping plate close to the second cylinder, and a material collecting basket is rotatably arranged beside the glue dispensing table.

[0031] By adopting the technical scheme, after batch dispensing of the pull rivet nut is completed, the electromagnetic sheet is powered on, the second cylinder drives the stripping plate to move downward, when the electromagnetic sheet moves downward to be close to the pull rivet nut, the pull rivet nut is attracted by magnetic force to separate from the positioning block and is adsorbed on the stripping plate, then the material collecting basket is moved to be opposite to the stripping plate, and then the electromagnetic sheet is powered off, the pull rivet nut on the stripping plate is shifted into the material collecting basket. The cooperation of the electromagnetic sheet and the material collecting basket enables batch stripping of the dispensed pull rivet nut, compared with the one-by-one stripping in the prior art, the setting of the electromagnetic sheet further improves the work efficiency and production efficiency.

[0032] Optionally, the inner wall of the elastic limiting cover is spaced apart in the radial direction thereof and is provided with a plurality of cutting openings.

[0033] By adopting the technical scheme, the cutting openings are arranged to facilitate the flange part of the pull rivet nut to quickly enter the limiting cavity of the elastic limiting cover under the action of the first pressing assembly.

[0034] Optionally, the feeding hole is arranged in an expanding manner, and the hole diameter of the feeding hole gradually decreases in the feeding direction.

[0035] By adopting the technical scheme, the feeding hole is arranged as an expanding hole, which facilitates accurate and rapid transfer of the pull rivet nut from the vibrating disc to each feeding hole, thereby improving the feeding efficiency.

[0036] Optionally, a transmission member for transmitting the upper feeding disc is arranged between the vibrating disc and the glue dispensing table.

[0037] By adopting the technical scheme, the transmission member is arranged to reciprocally transmit the upper feeding disc filled with pull rivet nuts and the empty upper feeding disc, thereby forming a complete process flow line and further improving the production efficiency.

[0038] In summary, the present application has at least one of the following beneficial technical effects:

[0039] 1. In the production of rivet nuts, after material selection, wire drawing, cold heading, tapping, quenching, tempering and surface treatment, the rivet nuts are initially processed. Then, the rivet nuts are batch screened so that the flange of the rivet nuts at the vibratory feeder outlet is facing upward. The rivet nuts then fall from the outlet onto the feeding mechanism, and are then transferred to the dispensing mechanism for batch dispensing. This batch feeding method saves feeding time, improves feeding efficiency and saves manpower.

[0040] 2. When the first pressing component is pressed down, the elastic limiting cover deforms under pressure and indents inward until it fits the inner wall of the elastic limiting cover. At this time, the flange of the rivet nut is in the cavity of the first pressing component. When the first pressing component is reset, the elastic limiting cover resets and closes under its own elastic force. The inner diameter of the closed elastic limiting cover is smaller than the inner diameter of the flange, thus limiting the flange. The structure is simple and the operation is convenient, realizing batch limiting of multiple rivet nuts.

[0041] 3. After the batch dispensing of adhesive to the rivet nuts is completed, the electromagnetic plate is energized, and the second cylinder drives the stripping plate to move downwards. When the electromagnetic plate moves close to the rivet nuts, the rivet nuts are attracted by magnetic force, detach from the positioning block, and are attracted to the stripping plate. Then, the receiving basket is moved so that it is aligned with the pusher plate. Immediately afterwards, the electromagnetic plate is de-energized, and the rivet nuts on the stripping plate are transferred into the receiving basket. The cooperation between the electromagnetic plate and the receiving basket enables the batch stripping of the dispensed rivet nuts. Compared with the one-by-one stripping in the existing technology, the electromagnetic plate further improves work efficiency and production efficiency. Attached Figure Description

[0042] Figure 1 This is a process flow diagram of an embodiment of this application.

[0043] Figure 2 This is a schematic diagram of the overall structure of the feeding mechanism and the dispensing mechanism in the embodiments of this application.

[0044] Figure 3 This is a schematic diagram of the overall structure of the feeding tray in an embodiment of this application.

[0045] Figure 4 This is a partial cross-sectional view of the feeding tray in an embodiment of this application.

[0046] Figure 5 yes Figure 3 A magnified structural diagram of part A in the middle.

[0047] Figure 6 This is a schematic diagram of the overall structure of the dispensing station in an embodiment of this application.

[0048] Figure 7 yes Figure 2 A magnified structural diagram of part B.

[0049] Fig. 1, feeding mechanism; 101, placing table; 102, feeding disc; 2, dispensing mechanism; 201, dispensing table; 202, dispensing machine; 203, positioning block; 3, feeding hole; 4, elastic limiting piece; 41, elastic limiting cover; 5, first pressing assembly; 51, first air cylinder; 52, pressing plate; 6, second pressing assembly; 61, second air cylinder; 62, stripping plate; 7, electromagnetic sheet; 8, material collecting basket; 81, material collecting body; 82, inclined guide plate; 9, cutting opening; 10, transmission piece; 11, perforation. DETAILED DESCRIPTION

[0050] The following will be described in detail with reference to the accompanying drawings Figures 1-7 The application is further described in detail.

[0051] The embodiment of the application discloses a production process of a waterproof and leakage-proof pull rivet nut.

[0052] Referring to Figure 1 The production process of the waterproof and leakage-proof pull rivet nut comprises the following steps:

[0053] S1: material selection: selecting a suitable blank material;

[0054] S2: wire drawing: drawing the blank material into a shape through a wire drawing machine;

[0055] S3: cold heading: cold heading the drawn profile through a cold heading machine, thereby obtaining a pull rivet nut;

[0056] S4: tapping: tapping the pull rivet nut by using a tapping machine;

[0057] S5: quenching: quenching the shaped pull rivet nut in a heating furnace;

[0058] S6: tempering: tempering the quenched pull rivet nut;

[0059] S7: surface treatment: performing rust-proof treatment on the heat-treated pull rivet nut;

[0060] S8: screening and transferring: transferring the rust-proof treated pull rivet nut to a vibrating disc for screening, so that the flange part of the screened pull rivet nut faces upward, and transferring the pull rivet nut in batches to the feeding mechanism 1;

[0061] S9: dispensing: moving the pull rivet nut on the feeding mechanism 1 to the dispensing mechanism 2, and centrally dispensing the position of the dispensing part of the pull rivet nut by using the dispensing mechanism 2.

[0062] In the production of the pull nut, after the material selection, wire drawing, cold upsetting, tapping, quenching, tempering and surface treatment, the pull nut is preliminarily processed, and then the pull nut is batch screened, the flange of the pull nut at the discharge port of the vibrating disc is upward, and then the pull nut falls from the discharge port to the feeding mechanism 1, and then the pull nut on the feeding mechanism 1 is transferred to the dispensing mechanism 2 for batch dispensing. This batch feeding mode saves feeding time, improves feeding efficiency, and saves manpower.

[0063] Specifically, referring to Figure 1 、 Figure 2 and Figure 3 , the feeding mechanism 1 comprises a placement table 101 arranged horizontally, the placement table 101 is opposite to the vibrating disc, and the placement table 101 is provided with a feeding disc 102, a plurality of feeding holes 3 are formed in the feeding disc 102, and the plurality of feeding holes 3 are arranged in a rectangular array.

[0064] Referring to Figure 4 and Figure 5 , the feeding disc 102 is provided with an elastic limiting piece 4 for limiting the pull cap part from sliding out of the corresponding feeding hole 3 at the top edge of the feeding hole 3. The elastic limiting piece 4 is an elastic limiting cover 41, the material of the elastic limiting cover 41 is hard rubber material, and the elastic limiting cover 41 will deform under external force. The top of the elastic limiting cover 41 is provided with a through hole 11, the elastic limiting cover 41 and the feeding disc 102 form an open limiting cavity for accommodating the flange part, the inner diameter of the through hole 11 is not less than the inner diameter of the groove, and the inner diameter of the through hole 11 is less than the diameter of the flange part. The inner wall of the elastic limiting cover 41 is provided with a plurality of cutting openings 9 in the radial direction.

[0065] Referring to Figure 2 , the placement table 101 is further provided with a first pressing assembly 5 for pressing the pull nut on the feeding disc 102 into the corresponding limiting cavity. The first pressing assembly 5 is a first cylinder 51 and a pressing plate 52 fixed on the extension end of the first cylinder 51, and the pressing plate 52 is arranged horizontally.

[0066] During feeding, the vibrating disc screens the pull nuts in batches, and the flange of the pull nut discharged from the vibrating disc is upward and the pull cap is downward. The feeding disc 102 receives the discharged pull nut, which can be received manually or automatically. The pull nut is inserted into the corresponding feeding hole 3, and at this time, the side of the flange close to the pull cap abuts against the outer surface of the elastic limiting cover 41, and then the pressing plate 52 vertically moves downward under the action of the first cylinder 51 and covers the flange of each pull nut.

[0067] When pressed down, the elastic limiting cover 41 is pressed to deform and inwardly recess until it is attached to the inner wall of the elastic limiting cover 41, at which time the flange part of the pull rivet nut is in the cavity of the elastic limiting cover 41, when the first pressing assembly 5 resets, the elastic limiting cover 41 resets under the action of its own elastic force, the inner diameter of the reset elastic limiting cover 41 is smaller than the inner diameter of the flange part, realizing the limiting of the flange part, simple structure and convenient operation, realizing the batch limiting of multiple pull rivet nuts. The cutting opening 9 is provided to facilitate the flange part of the pull rivet nut to quickly enter the limiting cavity of the elastic limiting cover 41 under the action of the pressing plate 52.

[0068] With reference to Figure 2 , a transmission part 10 for transmitting the feeding disc 102 is installed beside the placing table 101, and the transmission part 10 is two parallel conveying belts with opposite transmission directions in the embodiment of the application. The side of the conveying belt away from the placing table 101 is the glue dispensing mechanism 2.

[0069] With reference to Figure 2 and Figure 6 , the glue dispensing mechanism 2 includes a horizontal glue dispensing table 201, a glue dispenser 202 beside the glue dispensing table 201, and a plurality of positioning blocks 203 corresponding to the number of the feeding holes 3 and arranged on the glue dispensing table 201, the positioning blocks 203 are matched with the grooves of the flange part of the pull rivet nut, and the arrangement positions of the plurality of positioning blocks 203 are consistent with the arrangement positions of the feeding holes 3, and a second pressing assembly 6 for batch inserting the plurality of pull rivet nuts on the feeding disc 102 into the corresponding positioning blocks 203 is arranged above the glue dispensing table 201.

[0070] With reference to Figure 2 and Figure 7 , the second pressing assembly 6 in the application is a second air cylinder 61 and a stripping plate 62 fixed on the telescopic end of the second air cylinder 61, the stripping plate 62 is horizontally arranged and is matched with the size of the feeding disc 102. And the side of the stripping plate 62 close to the second air cylinder 61 is fixed with an electromagnetic sheet 7. In addition, a material collecting basket 8 is placed beside the glue dispensing table 201, and the material collecting basket 8 includes a movable material collecting body 81 and an inclined guide plate 82 fixed on the material collecting body 81 and communicating with the material collecting body 81.

[0071] When the loading disc 102 is transmitted to the glue dispensing table 201 by the conveying belt, the loading disc 102 is turned over by 180 degrees, that is, the flange part of the pull nut faces downward, and the cap part faces upward. At this time, the loading disc 102 is buckled to the glue dispensing table 201, so that each pull nut is inserted into the corresponding positioning block 203. Then, the second cylinder 61 drives the stripping plate 62 to move linearly and reciprocally. When the stripping plate 62 moves downward, it first abuts against the cap part of the pull nut, and then lifts the loading disc 102. When the loading disc 102 abuts against the stripping plate 62, it means that the pull nut has been successfully stripped. At this time, the second cylinder 61 drives the stripping plate 62 to reset, shifts the loading disc 102, and the glue dispenser 202 performs batch glue dispensing on the pull nut. The above batch feeding, batch stripping and batch glue dispensing greatly improve the work efficiency and solve the problem of low production process operation efficiency of the pull nut during the glue dispensing process.

[0072] After the glue dispensing is completed, the electromagnetic sheet 7 is powered on, and the second cylinder 61 drives the stripping plate 62 to move downward. When the electromagnetic sheet 7 moves downward to be close to the pull nut, the pull nut is attracted by the magnetic force to separate from the positioning block 203 and is adsorbed on the stripping plate 62. Then, the material collecting basket 8 is moved to make the material collecting basket 8 opposite to the pushing plate. Then, the electromagnetic sheet 7 is powered off, and the pull nut on the stripping plate 62 is shifted into the material collecting basket 8. The cooperation of the electromagnetic sheet 7 and the material collecting basket 8 enables batch stripping of the glued pull nut, which further improves the work efficiency and production efficiency compared with the one-by-one stripping in the prior art.

[0073] The implementation principle of the production process of the waterproof and leakage-proof pull nut is as follows: after a series of steps such as material selection, wire drawing, cold upsetting, tapping, quenching, tempering and surface treatment, the pull nut is initially formed. In order to make the pull nut have the effect of waterproof and leakage-proof, the pull nut needs to be subjected to glue dispensing treatment.

[0074] Firstly, the pull nut is subjected to batch screening by using the vibrating disc. The loading disc 102 receives the pull nut at the discharging end of the vibrating disc, so that the pull nut is inserted into the corresponding feeding hole 3. Then, under the action of the lower pressing plate 52, the flange part of the plurality of pull nuts is pressed into the corresponding elastic limiting cavity. Then, the conveying belt transmits the loading disc 102. Then, the loading disc 102 transmitted to the glue dispensing table 201 is turned over by 180 degrees and buckled to the glue dispensing table 201, so that each pull nut is inserted into the corresponding positioning block 203.

[0075] Next, the stripper plate 62 is pressed down to separate the flange of the pull nut from the limiting cavity, the upper feeding plate 102 is removed, the glue dispenser 202 is used to batch glue dispensing, after the glue dispensing is completed, the solenoid 7 is powered on, the cylinder drives the stripper plate 62 to move down, when the solenoid 7 moves close to the pull nut, the pull nut is attracted by the magnetic force to separate from the positioning block 203 and is adsorbed on the stripper plate 62, then the material collecting basket 8 is moved to be opposite to the pushing plate, then the solenoid 7 is powered off, the pull nut on the stripper plate 62 is transferred to the material collecting basket 8.

[0076] Compared with the one-by-one feeding and discharging mode, the above batch feeding, batch discharging, batch glue dispensing and batch discharging mode greatly improves the production efficiency, saves time and manpower, and improves the problem of low production process operation efficiency of the pull nut in the production process.

[0077] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A manufacturing process for a waterproof and leak-proof rivet nut, characterized in that: Includes the following steps: S1: Material Selection: Select suitable raw material; S2: Wire drawing: Drawing raw materials into shape using a wire drawing machine; S3: Cold heading: The drawn profile is cold-headed using a cold heading machine to obtain rivet nuts; S4: Tapping: Using a tapping machine to tap the threads of the rivet nut; S5: Quenching: Quenching the formed rivet nuts in a heating furnace; S6: Tempering: Tempering the quenched rivet nuts; S7: Surface treatment: Rust prevention treatment for heat-treated rivet nuts; S8: Screening and transfer: Transfer the rust-proof rivet nuts to the vibrating plate for screening, so that the flange of the screened rivet nuts faces upward, and transfer the rivet nuts in batches to the feeding mechanism (1); S9: Dispensing: Move the rivet nut on the feeding mechanism (1) to the dispensing mechanism (2), and use the dispensing mechanism (2) to dispense the dispensing part of the rivet nut in a concentrated batch; The feeding mechanism (1) includes a placement platform (101) and a feeding plate (102) located on the placement platform (101) and corresponding to the discharge port of the vibrating plate. The surface of the feeding plate (102) is provided with a plurality of feeding holes (3) along its height direction. The diameter of the feeding holes (3) is not less than the diameter of the pull cap part. The feeding tray (102) is provided with an elastic limiting member (4) on the periphery of the feeding hole (3) to limit the slippage of the rivet part from the corresponding feeding hole (3). The placement table (101) is also provided with a first pressing component (5) for pressing the rivet nuts on the feeding tray (102) into the corresponding limiting cavity in batches. The elastic limiting member (4) includes an elastic limiting cover (41) disposed on the feed tray (102) around the feed hole (3). The top surface of the elastic limiting cover (41) is provided with a through hole (11). The elastic limiting cover (41) and the feed tray (102) form an open limiting cavity for accommodating the flange. The inner diameter of the through hole (11) is not less than the inner diameter of the groove of the rivet nut flange, and the inner diameter of the through hole (11) is less than the diameter of the flange. When the first pressing component (5) presses against the flange, the flange moves under pressure into the corresponding open limiting cavity.

2. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 1, characterized in that: The dispensing mechanism (2) includes a dispensing table (201), a dispensing machine (202), and a plurality of positioning blocks (203) on the dispensing table (201) corresponding to the number of loading holes (3). The positioning blocks (203) are adapted to the grooves of the flange of the rivet nut, and the arrangement of the plurality of positioning blocks (203) is consistent with the arrangement of the loading holes (3). A second pressing component (6) is provided above the dispensing table (201) for batch inserting the plurality of rivet nuts on the loading tray (102) into the corresponding positioning blocks (203).

3. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 2, characterized in that: The second pressing component (6) includes a second cylinder (61) and a horizontally arranged stripper plate (62) disposed on the telescopic end of the second cylinder (61). The stripper plate (62) is in movable contact with the pull cap portion on the feeding tray (102).

4. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 3, characterized in that: An electromagnetic plate (7) is provided on the side of the stripping plate (62) near the second cylinder (61), and a receiving basket (8) is rotatably installed next to the dispensing table (201).

5. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 1, characterized in that: The inner wall of the elastic limiting cover (41) is provided with a number of cuts (9) spaced apart along its radial direction.

6. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 1, characterized in that: The feeding hole (3) is flared, and the diameter of the feeding hole (3) gradually decreases along the feeding direction.

7. The manufacturing process of a waterproof and leak-proof rivet nut according to claim 2, characterized in that: A transmission component (10) for transmitting the loading tray (102) is provided between the vibratory feeder and the dispensing table (201).

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