A cold heading machine for rivet nuts

Abstract

The application relates to the rivet nut processing technical field, and particularly discloses a cold upsetting forming equipment for a rivet nut, which comprises a sand blasting scrap removing mechanism and a cold upsetting mechanism, further comprises an oil removing system arranged at intervals with the cold upsetting mechanism, the oil removing system comprises an external oil removing mechanism, an internal oil removing mechanism, a linkage mechanism and a flushing mechanism. The external oil removing mechanism and the internal oil removing mechanism can respectively spray the external and internal oil removing agents on the rivet nut, and then the flushing mechanism is used for flushing the oil removing agents and the cleaned oil stains, so that most of the cooling oil on the rivet nut is not remained, and in the process of removing oil by the external oil removing mechanism, the external oil removing mechanism can drive the oil removing end of the internal oil removing mechanism to extend into the interior of the rivet nut, so that the internal oil removing is facilitated.

Description

Technical Field

[0001] This application relates to the field of rivet nut processing technology, and in particular to a cold heading forming equipment for rivet nuts. Background Technology

[0002] Rivet nuts, also known as pull nuts or rivet caps, are used in the fastening of various metal sheets, pipes, and other materials in the manufacturing industry. They were developed to address the shortcomings of welded nuts on thin metal sheets and pipes, such as easy melting, easy deformation of the base material during welding, and easy stripping of internal threads. They do not require tapping internal threads or welding nuts, and are easy to use.

[0003] In the forming process of rivet nuts, cold heading technology is a major processing technology. Cold heading belongs to the category of metal pressure processing. At room temperature, the blank is placed in the mold of an automatic cold-sensitive machine or press. Pressure is applied to the mold, and the blank is deformed in the mold cavity by the relative movement of the upper and lower molds to form the shape that needs to be processed.

[0004] Chinese utility model patent document with publication number CN115301872A discloses a cold heading forming equipment for rivet nuts, including a frame, on which a sandblasting and chip removal mechanism, a cold heading mechanism, and a cleaning and discharging mechanism are respectively arranged. A transfer robotic arm is arranged between the sandblasting and chip removal mechanism and the cold heading mechanism, and a transfer robotic arm is also arranged between the cold heading mechanism and the cleaning and discharging mechanism.

[0005] During the processing of rivet nuts, the rivet nuts are first polished by a sandblasting and chip removal mechanism, and then transferred to a cold heading mechanism by a transfer robotic arm for cold heading. During the cold heading process, cooling oil needs to be added evenly for cooling and lubrication. After cold heading, the rivet nuts are transferred to a cleaning and unloading mechanism by a transfer robotic arm for vibration chip removal, thereby removing the debris from the processing and completing the processing of the rivet nuts.

[0006] Regarding the aforementioned technologies, since cooling oil is added for cooling and lubrication during the cold heading process of rivet nuts, the rivet nuts need to be degreased after cold heading. However, the vibration chip removal process in the above technologies uses mechanical vibration and wire brushes to shake off and brush away the cooling oil, which cannot completely clean the cooling oil on the rivet nuts. Furthermore, it is difficult for the wire brush to reach into the hole of the rivet nut to clean the inner wall thoroughly, resulting in residual cooling oil on the rivet nuts after cold heading, thus affecting the processing quality of the rivet nuts. Therefore, improvements are needed. Summary of the Invention

[0007] To improve the cleaning effect of residual cooling oil on rivet nuts, this application provides a cold forging forming device for rivet nuts.

[0008] This application provides a cold heading forming equipment for rivet nuts, which adopts the following technical solution:

[0009] A cold heading forming device for rivet nuts includes a sandblasting and chip removal mechanism, a cold heading mechanism, and an oil removal system spaced apart from the cold heading mechanism. The oil removal system includes:

[0010] An external degreasing mechanism is used to spray a degreasing agent onto the outer peripheral wall of the rivet nut;

[0011] An internal degreasing mechanism is used to spray a degreasing agent onto the inner circumferential wall of the rivet nut;

[0012] A linkage mechanism is used to link the external oil removal mechanism and the internal oil removal mechanism. When the external oil removal mechanism is activated, the linkage mechanism can drive the oil removal end of the internal oil removal mechanism to extend into the interior of the rivet nut.

[0013] The rinsing mechanism is used to rinse and clean the rivet nuts after spraying degreasing agent.

[0014] By adopting the above technical solution, when the external degreasing mechanism is activated, it can spray degreasing agent on the outside of the rivet nut. The external degreasing mechanism can also drive the degreasing end of the internal degreasing mechanism to extend into the inside of the rivet nut through the linkage mechanism, thereby spraying degreasing agent on the inner wall of the rivet nut. This achieves simultaneous cleaning of the outside and inside of the rivet nut. Then, the rinsing mechanism performs a comprehensive rinsing of the rivet nut, making the produced rivet nut cleaner, significantly reducing the residue of cooling oil, and improving the processing quality of the rivet nut.

[0015] Optionally, the external oil removal mechanism includes a mounting cylinder, a spraying assembly movably mounted inside the mounting cylinder, and a power assembly for driving the spraying assembly to rotate and spray.

[0016] The mounting cylinder is equipped with a conveying assembly for conveying rivet nuts. The rivet nuts are evenly distributed in a straight line on the conveying part of the conveying assembly, and each rivet nut passes through the center line of the length direction of the mounting cylinder.

[0017] By adopting the above technical solution, the rivet nut is conveyed from the cold forging mechanism into the mounting cylinder by the conveying component. At this time, the power component drives the spraying component to spray the rivet nut with degreasing agent to remove oil from the surface of the rivet nut.

[0018] Optionally, the spraying assembly includes a liquid storage ring rotatably mounted in the inner wall of the mounting cylinder, a plurality of nozzles extending into the inner cavity of the mounting cylinder and spaced apart on the inner peripheral wall of the liquid storage ring, and a first gear and a gear ring respectively fixedly connected to the liquid storage ring;

[0019] The gear ring and the first gear are respectively fixed on the inner and outer sides of the liquid storage ring. The power component is used to drive the first gear to rotate, and the gear ring is used to drive the linkage mechanism to move, so that the linkage mechanism drives the oil removal end of the internal oil removal mechanism to extend into the rivet nut.

[0020] By adopting the above technical solution, when the power component is working, it can drive the first gear to rotate. The rotation of the first gear drives the liquid storage ring to rotate, causing each nozzle to rotate. Under the action of external liquid supply, the degreasing agent is sprayed out from each nozzle to achieve degreasing of the rivet nut surface.

[0021] Optionally, the internal degreasing mechanism includes a mounting plate, a nozzle slidably mounted on the mounting plate, and a reset component that keeps the nozzle in its original position. The sliding direction of the nozzle corresponds to the length direction of the inner cavity of the rivet nut, and the linkage mechanism can drive the nozzle to move into the inner cavity of the rivet nut.

[0022] By adopting the above technical solution, when the power component is activated, it drives the liquid storage ring to rotate. The rotating liquid storage ring drives the gear ring to rotate, which in turn drives the linkage component to move. This causes the linkage component to drive the oil removal end of the internal oil removal mechanism to extend into the rivet nut to clean the oil stains on the inner circumferential wall.

[0023] Optionally, the linkage mechanism includes a second gear and a third gear rotatably mounted on the mounting plate, a cam disposed on the third gear and coaxially fixed with the third gear, the gear ring meshing with the second gear, the second gear meshing with the third gear, the cam being used to drive the nozzle to move into the inner cavity of the rivet nut, and the reset member being used to drive the nozzle to reset after spraying.

[0024] By adopting the above technical solution, when the gear ring rotates, it can drive the second gear meshing with it to rotate, the second gear drives the third gear to rotate, the third gear rotates and drives the coaxial fixed cam to rotate, the cam rotates and pushes against the end of the nozzle, so that the spraying end of the nozzle extends into the rivet nut.

[0025] When the cam rotates to the point where it no longer presses against the nozzle end, the spraying end of the nozzle extends out from inside the rivet nut under the action of the reset component, completing the cleaning of the inner wall of one rivet nut. Under the transmission of the conveying component, the next rivet nut is then cleaned in sequence.

[0026] Optionally, the flushing mechanism is disposed on the mounting cylinder, and the outer wall of the mounting cylinder is provided with a control component for opening the valve of the flushing mechanism, and the power component can control the valve opening component to open the valve through the control component.

[0027] By adopting the above technical solution, when the power component is activated, it can drive the control component to activate, thereby controlling the valve opening component to open the valve, so that the flushing mechanism can flush and clean the rivet nut.

[0028] Optionally, the rinsing mechanism includes a plurality of rinsing nozzles disposed on the inner peripheral wall of the mounting cylinder and a rinsing chamber disposed on the mounting cylinder, wherein each of the rinsing nozzles is in communication with the inner cavity of the rinsing chamber;

[0029] A water storage tank is provided on the outer peripheral wall of the mounting cylinder. The water storage tank is provided with an inlet and an outlet. An inlet pipe is connected to the inlet, and the outlet is connected to the flushing chamber. The control component includes a first check valve and a second check valve respectively provided on the inlet and the outlet. The opening directions of the first check valve and the second check valve are opposite.

[0030] The water storage tank is also provided with a pressure regulating port, and a piston is slidably and sealed on the pressure regulating port. The power component can drive the piston to move repeatedly toward or away from the pressure regulating port.

[0031] By adopting the above technical solution, when the power component is activated, it can drive the piston to move repeatedly along the pressure regulating port to the water storage tank, thereby driving the first one-way valve and the second one-way valve to open and close respectively, thereby drawing water from the water inlet pipe into the water storage tank, and then pressurizing the water in the water storage tank into the flushing tank, and finally spraying it out from the flushing nozzle to achieve the flushing and cleaning of the rivet nut.

[0032] Optionally, the inner peripheral wall near the end of the mounting cylinder is provided with a detection mechanism for detecting rivet nuts entering the mounting cylinder.

[0033] By adopting the above technical solution, the testing agency can inspect the rivet nuts that enter the installation cylinder, enabling the internal degreasing mechanism to clean the inside of each rivet nut more accurately.

[0034] Optionally, the power assembly includes a drive component disposed on the outer peripheral wall of the mounting cylinder, a fixed cylinder fixed on the outer peripheral wall of the mounting cylinder, and an adjusting cylinder slidably sleeved inside the fixed cylinder;

[0035] The end of the adjusting cylinder near the piston is fixedly connected to the piston. A limiting member is provided between the fixed cylinder and the adjusting cylinder to limit the rotation of the adjusting cylinder. The output end of the driving member passes through the adjusting cylinder, and a bidirectional bolt rod is coaxially fixed to the end of the output end of the driving member. The inner circumferential wall of the adjusting cylinder is provided with a bidirectional thread that is adapted to the thread of the bidirectional thread rod.

[0036] A fourth gear is also fixedly mounted on the output end of the drive unit, and the fourth gear meshes with the first gear.

[0037] By adopting the above technical solution, when the driving component is working, it can drive the output end of the driving component to rotate. The output end of the driving component drives the bidirectional threaded rod to rotate, thereby driving the adjusting cylinder to move repeatedly along the inner cavity of the fixed cylinder, thereby driving the piston to move repeatedly, so that the first one-way valve and the second one-way valve on the water inlet and the water outlet open and close respectively, thereby realizing the automatic water pumping function, so that the driving component drives each flushing nozzle to spray water to flush and clean the rivet nut.

[0038] Optionally, the mounting cylinder is also provided with a drying mechanism for drying the rinsed rivet nuts.

[0039] By adopting the above technical solution, the drying mechanism can dry the rivet nuts after they have been rinsed, making the processed rivet nuts clean and dry.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. During the process of degreasing the outer surface of the rivet nut by the external degreasing mechanism, when the external degreasing mechanism is activated, it can drive the degreasing end of the internal degreasing mechanism to extend into the inner cavity of the rivet nut through the linkage mechanism, thereby achieving degreasing of the inner wall of the rivet nut.

[0042] 2. The power unit can drive the external oil removal mechanism to remove oil, and at the same time drive the flushing mechanism to automatically flush the rivet nuts after oil removal. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of a cold heading forming equipment for rivet nuts according to an embodiment of this application.

[0044] Figure 2 yes Figure 1 A partial structural cross-sectional view of a cold heading forming equipment for rivet nuts.

[0045] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0046] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0047] Figure 5 yes Figure 1 A partial structural schematic diagram of a cold heading forming equipment for rivet nuts from another perspective.

[0048] Figure 6 yes Figure 5 A partial structural diagram of the power component.

[0049] Reference numerals: 1. Machining platform; 11. Sandblasting and chip removal mechanism; 12. Cold heading mechanism; 2. Degreasing system; 21. External oil outlet mechanism; 211. Mounting cylinder; 2111. Water storage tank; 212. Spraying assembly; 2121. Liquid storage ring; 2122. Nozzle; 2123. First gear; 2124. Gear ring; 213. Power assembly; 2131. Drive component; 2132. Fixed cylinder; 2133. Adjusting cylinder; 22. Internal degreasing mechanism; 221. Mounting plate; 222. Spray pipe; 223. Reset component; 23. Linkage mechanism; 231. Second gear; 232. Third gear; 233. Cam; 24. Flushing mechanism; 241. Flushing chamber; 242. Flushing nozzle; 3. Drying mechanism; 4. Conveying assembly; 41. Conveying guide rail; 5. Liquid storage chamber; 6. Water outlet; 7. Rotary drum; 8. Control assembly; 9. Piston. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail below.

[0051] This application discloses a cold heading forming equipment for rivet nuts.

[0052] Reference Figure 1 A cold heading forming device for rivet nuts includes a processing platform 1, a sandblasting and chip removal mechanism 11 and a cold heading mechanism 12 set on the processing platform 1, and an oil removal system 2 set at intervals between the cold heading mechanism 12. The rivet nuts are first polished by the sandblasting and chip removal mechanism 11, then cold-headed by the cold heading mechanism 12, and then degreased by the oil removal system 2.

[0053] The oil removal system 2 includes an external oil outlet mechanism 21, an internal oil removal mechanism 22, a linkage mechanism 23, and a flushing mechanism 24.

[0054] The external degreasing mechanism can spray degreasing agent on the outer peripheral wall of the rivet nut, while the internal degreasing mechanism 22 can spray degreasing agent on the inner peripheral wall of the rivet nut; the linkage mechanism 23 can drive the degreasing end of the internal degreasing mechanism 22 to extend into the inner cavity of the rivet nut through the external degreasing mechanism, so as to realize the linkage between the external degreasing mechanism 21 and the internal degreasing mechanism 22.

[0055] The rinsing mechanism 24 can rinse the rivet nuts after they have been degreased by spraying degreasing agent. In order to dry the rinsed rivet nuts, a drying mechanism 3 is also provided, which can dry the moisture on the rivet nuts.

[0056] Reference Figure 1 and Figure 2A conveying assembly 4 for conveying rivet nuts is provided between the cold heading mechanism 12 and the degreasing mechanism. The conveying assembly 4 includes a conveying guide rail 41 and multiple slots opened on the conveying guide rail 41. The rivet nuts can be placed in the corresponding slots in sequence and conveyed to the degreasing system 2 for degreasing operation under the conveying guide rail 41.

[0057] Reference Figure 3 , Figure 4 and Figure 5 The external oil removal mechanism includes an installation cylinder 211, a spraying assembly 212, and a power assembly 213. The installation cylinder 211 has an open inner cavity and is sleeved on the outside of the conveying guide rail 41 along the length direction of the conveying guide rail 41. The installation cylinder 211 is fixed on the processing platform 1 by a mounting bracket. The conveying guide rail 41 passes horizontally through the center line of the length direction of the installation cylinder 211.

[0058] Each rivet nut is placed at intervals on the conveying guide rail 41 and is conveyed into the mounting cylinder 211 by the conveying guide rail 41 for degreasing treatment.

[0059] The spraying assembly 212 is movably installed inside the mounting cylinder 211. For details, please refer to... Figure 3 , Figure 4 and Figure 5 The spraying assembly 212 includes a liquid storage ring 2121, a nozzle 2122, a first gear 2123, and a gear ring 2124. An annular mounting groove is provided in the inner peripheral wall of the mounting cylinder 211. The annular liquid storage ring 2121 is rotatably installed in the mounting groove, and the two side walls of the liquid storage ring 2121 are recessed inward, so that a liquid storage cavity 5 is formed between the liquid storage ring 2121 and the side wall of the mounting groove.

[0060] A liquid guide pipe is pre-embedded on the side wall of the mounting cylinder 211 where the liquid storage chamber 5 is located. The liquid guide pipe is connected to the external spraying system, so that the external degreasing agent can enter the liquid storage chamber 5 through the liquid guide pipe.

[0061] To reduce the leakage of degreasing agent in the liquid storage chamber 5, sliding sealing rings are fixed on the liquid storage ring 2121 respectively, and sealing grooves are correspondingly opened on the inner peripheral wall of the mounting groove, and the sliding sealing rings slide in the sealing grooves.

[0062] Multiple water inlets 6 are provided on the inwardly recessed outer wall of the liquid storage ring 2121 corresponding to the liquid storage cavity 5, so that the degreasing agent in the liquid storage cavity 5 can pass through the water inlets 6 and enter the liquid storage ring 2121.

[0063] Reference Figure 3 and Figure 4Multiple nozzles 2122 are provided, and the multiple nozzles 2122 are arranged in a circle on the inner peripheral wall of the liquid storage ring 2121. Each nozzle 2122 is connected to the inner cavity of the liquid storage ring 2121, so that the degreasing agent in the liquid storage ring 2121 can be sprayed out by each nozzle 2122 under the action of the external spraying system.

[0064] Reference Figure 3 , Figure 4 and Figure 5 The gear ring 2124 and the first gear 2123 are respectively fixed on the inner and outer sides of the liquid storage ring 2121. The first gear 2123 is sleeved on the outside of the mounting cylinder 211 and fixedly connected to the liquid storage ring 2121. The power component 213 can drive the first gear 2123 to rotate, thereby driving the liquid storage ring 2121 to rotate, so as to realize the rotation of each nozzle 2122 to discharge liquid.

[0065] A rotating cylinder 7 is rotatably mounted on the inner circumferential wall of the mounting cylinder 211. Each nozzle 2122 passes through the rotating cylinder 7 and is fixedly connected to the rotating cylinder 7, so that each nozzle 2122 can drive the rotating cylinder 7 to rotate when it rotates.

[0066] Reference Figure 2 and Figure 3 The toothed ring 2124 is welded and fixed to the inner circumferential wall of the rotating drum 7. It can rotate under the drive of the rotating drum 7. When the toothed ring 2124 rotates, it can drive the internal oil removal mechanism 22 to move through the linkage mechanism 23, so that the oil removal end of the internal oil removal mechanism 22 extends into the inner cavity of the rivet nut, thereby realizing the oil removal spraying on the inner wall of the rivet nut.

[0067] Reference Figure 2 and Figure 4 The internal oil removal mechanism 22 includes a mounting plate 221, a nozzle 222, and a reset component 223. The mounting plate 221 is welded and fixed to the inner wall of the mounting cylinder 211, and the plate surface of the mounting plate 221 is perpendicular to the conveying direction of the conveying guide rail 41. The nozzle 222 is slidably mounted on the mounting plate 221, and the end of the nozzle 222 is set perpendicular to the upper surface of the conveying guide rail 41. Multiple liquid outlets are opened circumferentially at the end of the nozzle 222, and the sliding direction of the nozzle 222 is consistent with the extension direction of the inner cavity of the rivet nut, so that the end of the nozzle 222 can be inserted into the inner cavity of the rivet nut when it moves.

[0068] The reset component 223 can reset the spray nozzle 222 after it has been inserted into the rivet nut and sprayed, so that the sprayed rivet nut can be quickly removed from the inner cavity without affecting the cleaning of the next rivet nut.

[0069] When each nozzle 2122 rotates, it can drive the end of the spray pipe 222 to be inserted into the corresponding rivet nut cavity through the linkage mechanism 23. During this process, each nozzle 2122 can spray the surface of the rivet nut, and the end of the spray pipe 222 can spray the inner cavity of the rivet nut, thereby cleaning the residual cooling oil on the rivet nut more thoroughly.

[0070] Reference Figure 2 and Figure 4 The linkage mechanism 23 includes a second gear 231, a third gear 232, and a cam 233. The second gear 231 and the third gear 232 are rotatably mounted on the mounting plate 221, and the second gear 231 meshes with the tooth surface of the gear ring 2124. The third gear 232 meshes with the second gear 231, and the cam 233 is coaxially fixed with the third gear 232.

[0071] When the gear ring 2124 rotates, it can drive the second gear 231 to rotate, and the second gear 231 drives the third gear 232 to rotate, thereby causing the cam 233 to rotate. During the rotation of the cam 233, the convex surface of the cam 233 can push the nozzle 222 to insert into the inner cavity of the corresponding rivet nut, thereby achieving spray cleaning of the inner cavity of the rivet nut.

[0072] When the convex surface of the cam 233 no longer abuts against the nozzle 222, the nozzle 222 automatically resets under the action of the reset member 223. In this embodiment, the reset member 223 is a spring. In other embodiments, it can also be set as a reset member 223 that can reset the nozzle 222 in the same way.

[0073] Specifically, a groove is provided on the mounting plate 221, and a slider is fixedly fitted onto the nozzle 222. The slider is slidably engaged in the groove. One end of a spring is welded and fixed to the inner circumferential wall of the groove, and the other end is welded and fixed to the slider. The spring can pull the slider, causing the end of the nozzle 222 inserted into the rivet nut to return to its original position.

[0074] An inspection mechanism is installed inside the mounting cylinder 211 to detect the position of each rivet nut. The inspection mechanism enables more accurate identification of the rivet nut position, thereby allowing the spray nozzle 222 to spray and clean the inner cavity of each rivet nut more precisely.

[0075] After the degreasing agent is sprayed by the external degreasing mechanism and the internal degreasing mechanism 22, the rivet nut needs to be rinsed. The rinsing mechanism 24 will be explained in detail below.

[0076] Reference Figure 2 and Figure 5The flushing mechanism 24 is mounted on the mounting cylinder 211. A control component 8 for opening the valve of the flushing mechanism 24 is provided on the outer wall of the mounting cylinder 211. The power component 213 can control the valve opening component to open the valve through the control component 8.

[0077] The rinsing mechanism 24 includes a rinsing chamber 241 disposed on the inner peripheral wall of the mounting cylinder 211 and a plurality of rinsing nozzles 242 disposed in a circular arrangement on the rinsing chamber 241. Each rinsing nozzle 242 is connected to the inner cavity of the rinsing chamber 241. A water storage chamber 2111 is also fixedly installed on the outer peripheral wall of the mounting cylinder 211. The water storage chamber 2111 is provided with an inlet and an outlet. An inlet pipe is connected to the inlet, and the outlet is connected to the rinsing chamber 241.

[0078] Control component 8 includes a first check valve and a second check valve respectively disposed on the inlet and the outlet. The opening directions of the first check valve and the second check valve are opposite. Both the first check valve and the second check valve include a sealing plate rotatably mounted on the inlet or the outlet and a torsion spring that drives the sealing plate to elastically abut against the inlet or the outlet.

[0079] The water storage tank 2111 is also provided with a pressure regulating port, and a piston 9 is slidably and sealed on the pressure regulating port. The power component 213 can drive the piston 9 to move towards or away from the pressure regulating port.

[0080] When piston 9 moves out of water storage tank 2111, the pressure inside water storage tank 2111 decreases, the first one-way valve on the inlet opens, and the second one-way valve on the outlet closes, allowing water to enter water storage tank 2111 for temporary storage; when piston 9 moves into water storage tank 2111, the pressure inside water storage tank 2111 increases, the second one-way valve on the outlet opens, and the first one-way valve on the inlet closes, allowing water to enter flushing tank 241 from water storage tank 2111, and finally be sprayed out by each flushing nozzle 242, achieving all-round flushing of rivet nuts.

[0081] Specifically, refer to Figure 5 and Figure 6 The power assembly 213 includes a drive component 2131, a fixed cylinder 2132, and an adjusting cylinder 2133. In this embodiment, the drive component 2131 is a servo motor. In other embodiments, a stepper motor, a geared motor, etc. can also be used. The servo motor is fixedly mounted on the outer peripheral wall of the mounting cylinder 211 by bolts. A fourth gear is coaxially sleeved on the output shaft of the servo motor. The fourth gear meshes with the first gear 2123 to drive the first gear 2123.

[0082] The fixed cylinder 2132 is fixed on the outer peripheral wall of the mounting cylinder 211, and the adjusting cylinder 2133 is slidably sleeved in the inner cavity of the fixed cylinder 2132. The end of the adjusting cylinder 2133 near the piston 9 is fixedly connected to the piston 9. A limiting member is provided between the fixed cylinder 2132 and the adjusting cylinder 2133 to limit the sliding of the adjusting cylinder 2133. The limiting member can be a limiting rod and a limiting groove, or other feasible implementation methods can be adopted. This embodiment will not be specifically described.

[0083] The output end of the servo motor passes through the adjusting cylinder 2133, and a bidirectional bolt rod is coaxially fixed at the end of the output end of the servo motor. The inner circumferential wall of the adjusting cylinder 2133 is provided with a bidirectional thread that is compatible with the thread of the bidirectional thread rod.

[0084] When the servo motor rotates, it can not only drive the fourth gear to rotate, but also drive the bidirectional threaded rod to rotate. When the bidirectional threaded rod rotates, it can drive the adjusting cylinder 2133 to move along the inner cavity of the fixed cylinder 2132, thereby pushing the piston 9 to compress the air pressure in the water storage tank 2111, thereby changing the pressure in the water storage tank 2111, thus realizing the automatic water spraying function of the flushing nozzle 242.

[0085] In other feasible implementations, a system can be set up to collect the degreasing agent and the water after rinsing, and then separate and filter the degreasing agent and water to achieve water recycling. Alternatively, a drain pipe can be installed at the bottom of the mounting cylinder 211 to drain away the water and oil after cleaning.

[0086] The last part requires drying the cleaned rivet nuts. The drying mechanism 3 is installed inside the mounting cylinder 211 and includes a heat storage chamber fixedly installed on the inner circumferential wall of the mounting cylinder 211 and multiple air outlet pipes arranged in a circle on the inner circumferential wall of the heat storage chamber. The heat storage chamber is connected to an external heat source, and the rivet nuts passing through the air outlet pipes can be dried quickly, thus achieving the drying process.

[0087] The implementation principle of the cold heading forming equipment for rivet nuts in this application embodiment is as follows: After being conveyed by the conveying guide rail 41, each rivet nut can pass through the external degreasing mechanism and the internal degreasing mechanism 22. During the process of the external degreasing mechanism degreasing the outer surface of the rivet nut, when the external degreasing mechanism is activated, it can drive the degreasing end of the internal degreasing mechanism 22 to extend into the inner cavity of the rivet nut through the linkage mechanism 23, so as to achieve degreasing of the inner wall of the rivet nut.

[0088] After degreasing, the rivet nuts are then cleaned and dried by the flushing mechanism 24 and the drying mechanism 3, respectively, thus completing the cleaning of the rivet nuts.

[0089] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cold heading forming apparatus for a rivet nut, comprising a shot blasting scrap removing mechanism (11), a cold heading mechanism (12), characterized in that: Further comprising an oil removing system (2) arranged apart from the cold heading mechanism (12), the oil removing system (2) comprising: an external oil removing mechanism for spraying oil removing agent on the outer circumferential wall of the lock nut; an internal oil removing mechanism (22) for spraying oil removing agent on the inner circumferential wall of the lock nut; a linkage mechanism (23) for linking the external oil removing mechanism and the internal oil removing mechanism (22), when the external oil removing mechanism is in action, the oil removing end of the internal oil removing mechanism (22) can be driven into the lock nut through the linkage mechanism (23); a flushing mechanism (24) for flushing and cleaning the lock nut after spraying oil removing agent; the external oil removing mechanism comprises a mounting cylinder (211), a spraying assembly (212) movably mounted in the mounting cylinder (211), and a power assembly (213) for driving the spraying assembly (212) to rotate and spray; a conveying assembly (4) is arranged in the mounting cylinder (211) for conveying lock nuts, each lock nut is arranged uniformly in a straight line on the conveying part of the conveying assembly (4), and each lock nut passes through the center line of the length direction of the mounting cylinder (211); the spraying assembly (212) comprises a liquid storage ring (2121) rotatably mounted in the inner wall of the mounting cylinder (211), a plurality of nozzles (2122) arranged apart on the inner circumferential wall of the liquid storage ring (2121) and extending into the inner cavity of the mounting cylinder (211), and a first gear (2123) and a gear ring (2124) fixedly connected with the liquid storage ring (2121) respectively; the gear ring (2124) and the first gear (2123) are fixed on the inner and outer sides of the liquid storage ring (2121) respectively, the power assembly (213) is used for driving the first gear (2123) to rotate, and the gear ring (2124) is used for driving the linkage mechanism (23) to act, so that the linkage mechanism (23) drives the oil removing end of the internal oil removing mechanism (22) to extend into the lock nut; the internal oil removing mechanism (22) comprises a mounting plate (221), a spray pipe (222) slidably mounted on the mounting plate (221), and a reset member (223) for keeping the spray pipe (222) in place, the sliding direction of the spray pipe (222) corresponds to the length direction of the inner cavity of the lock nut, and the linkage mechanism (23) can drive the spray pipe (222) to move towards the inner cavity of the lock nut; the linkage mechanism (23) comprises a second gear (231) and a third gear (232) rotatably mounted on the mounting plate (221), and a cam (233) arranged on the third gear (232) and fixed coaxially with the third gear (232), the gear ring (2124) is engaged with the second gear (231), the second gear (231) is engaged with the third gear (232), the cam (233) is used for driving the spray pipe (222) to move towards the inner cavity of the lock nut, and the reset member (223) is used for resetting the spray pipe (222) after spraying.

2. A cold heading apparatus for forming a riveted nut according to claim 1, wherein: The flushing mechanism (24) is arranged on the mounting cylinder (211), and a control assembly (8) for opening valve control of the flushing mechanism (24) is arranged on the outer wall of the mounting cylinder (211), and the power assembly (213) can be controlled to open the valve by the control assembly (8).

3. A cold heading machine for forming a nut- rivet according to claim 2, characterized in that: The flushing mechanism (24) comprises a plurality of flushing nozzles (242) arranged on the inner circumferential wall of the mounting cylinder (211) and a flushing bin (241) arranged on the mounting cylinder (211), and each flushing nozzle (242) is in communication with the inner cavity of the flushing bin (241). A water storage bin (2111) is arranged on the outer circumferential wall of the mounting cylinder (211), and a water inlet and a water outlet are respectively arranged on the water storage bin (2111), a water inlet pipe is in communication with the water inlet, the water outlet is in communication with the flushing bin (241), the control assembly (8) comprises a first one-way valve arranged on the water inlet and a second one-way valve arranged on the water outlet, and the opening valve directions of the first one-way valve and the second one-way valve are arranged in opposite directions. A pressure regulating port is further arranged on the water storage bin (2111), a piston (9) is slidably and sealingly arranged on the pressure regulating port, and the power assembly (213) can drive the piston (9) to move towards or away from the pressure regulating port repeatedly.

4. A cold heading machine for forming a nut- rivet according to claim 3, characterized in that: A detection mechanism for detecting a rivet nut entering the mounting cylinder (211) is arranged on the inner circumferential wall of the mounting cylinder (211) close to the end portion.

5. A cold heading apparatus for forming a nut insert as defined in claim 3, wherein: The power assembly (213) comprises a driving member (2131) arranged on the outer circumferential wall of the mounting cylinder (211), a fixed cylinder (2132) fixed on the outer circumferential wall of the mounting cylinder (211), and an adjusting cylinder (2133) slidably sleeved in the fixed cylinder (2132). One end of the adjusting cylinder (2133) close to the piston (9) is fixedly connected with the piston (9), a limiting member for limiting the sliding of the adjusting cylinder (2133) is arranged between the fixed cylinder (2132) and the adjusting cylinder (2133), the output end of the driving member (2131) penetrates the adjusting cylinder (2133), and a double-direction screw rod is coaxially fixed on the end portion of the output end of the driving member (2131), and a double-direction thread is arranged on the inner circumferential wall of the adjusting cylinder (2133). A fourth gear is further sleeved and fixed on the output end of the driving member (2131), and the fourth gear is engaged with the first gear (2123).

6. A cold heading apparatus for forming a nut insert as defined in claim 2, wherein: A drying mechanism (3) for drying the rivet nut after flushing is further arranged in the mounting cylinder (211).

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