Automatic riveting device and riveting method for sheet metal processing

Abstract

The present invention relates to the technical field of sheet metal riveting processing, and in particular to an automatic riveting device for sheet metal processing, including a workbench, a punching machine, a controller, an automatic feeder and a riveting die, wherein the punching machine is installed on the rear side of the upper surface of the workbench, the controller is installed at the right rear corner of the upper surface of the workbench, and the controller is electrically connected to the punching machine, the automatic feeder is installed on the upper surface of the workbench, and the automatic feeder is located directly below the punching machine, the automatic feeder is electrically connected to the controller, and the riveting die is installed on the top front side of the automatic feeder. The present invention has a workpiece positioning function, which is conducive to the staff to align the riveting hole of the workpiece with the riveting die, which can not only relieve the visual fatigue of the staff, but also will not cause the staff's arm soreness, the riveting quality of the horizontal riveting of the workpiece is guaranteed, and it also has a riveting nut ejection function, which saves time and effort for re-riveting the workpiece, improves the qualified rate, and saves costs.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal riveting processing, and in particular to an automatic riveting device and a riveting method for sheet metal processing. Background Art

[0002] The automatic punching machine uses a punching machine and a special connecting die through an instantaneous high-pressure processing process. According to the cold extrusion deformation of the plate material itself, a stress-free internal inlaid dot with a certain tensile and shear strength is formed, which can connect two or more layers of plates of different materials and thicknesses.

[0003] The automatic punching machine mainly includes a punching machine, a controller, an automatic feeder riveting die and a foot switch. When in use, the staff inserts the riveting hole of the workpiece on the riveting die, the automatic feeder sends the riveting nut to the top of the riveting die, the punching machine presses the riveting nut down, and embeds the riveting nut into the riveting hole of the workpiece to achieve the riveting process of the workpiece;

[0004] Since the rivet holes on the workpiece are small, before each riveting operation, the staff must carefully observe the rivet die and the rivet holes of the workpiece to align the rivet holes with the rivet die. The staff must also hold the workpiece with their arms suspended in the air. Working in this way for a long time will not only cause visual fatigue, but also easily lead to arm soreness. It is difficult to keep the workpiece in a horizontal state during riveting, and the quality of riveting cannot be guaranteed. Poor quality of the rivet nut or improper operation will cause the workpiece to fail to meet the riveting standards. However, the existing stamping machine does not have the function of ejecting the rivet nut. Re-riveting is time-consuming and labor-intensive, and directly scrapping it is a waste of cost. Therefore, it is necessary to propose an automatic riveting device with a positioning function. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art in which workers place workpieces in a high labor intensity and low accuracy, as well as the lack of a rivet nut ejection function, the technical problem to be solved by the present invention is an automatic riveting device and a riveting method for sheet metal processing.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic riveting device for sheet metal processing, comprising a workbench, a punching machine, a controller, an automatic feeder and a riveting die, wherein the punching machine is installed on the rear side of the upper surface of the workbench, the controller is installed at the right rear corner of the upper surface of the workbench, and the controller is electrically connected to the punching machine, the automatic feeder is installed on the upper surface of the workbench, and the automatic feeder is located directly below the punching machine, the automatic feeder is electrically connected to the controller, and the riveting die is installed on the top front side of the automatic feeder, and further comprising: a supporting platform, the supporting platform is installed at the right front corner of the upper surface of the workbench, and the upper surface of the supporting platform and the upper surface of the riveting die are located in the same horizontal plane; a plurality of positioners are installed in two rows from left to right on the upper surface of the supporting platform; a repair mechanism is installed on the left side wall of the workbench;

[0007] The purpose is to adjust the position and angle of the baffle and to position the workpiece. The positioner includes: a guide rail embedded in the top of the support platform, and the inner cavity of the guide rail is dovetail-shaped; a slider can be inserted into the inner cavity of the guide rail so as to slide back and forth; the baffle is rotatably installed on the top of the slider through a pin; a pressure rod is rotatably installed at the front left end of the baffle through a pin; a support rod is installed at the front right end of the baffle; a handle is connected to the outer wall of the support rod, and a slide is provided on the left side of the handle, and the pressure rod passes through the inner cavity of the slide; a U-shaped frame is installed at the front end of the pressure rod; there are two suction cups, which are respectively installed at both ends of the U-shaped frame, and the suction cups are adsorbed on the upper surface of the support platform to position the baffle.

[0008] Preferably, the tops of the opposing surfaces of the baffles on the two front and rear opposing positioners are inclined surfaces.

[0009] Preferably, the upper surfaces of the support platform, the guide rail and the slider are all on the same horizontal plane.

[0010] Preferably, the upward movement of the ejector pin is achieved in order to eject a qualified rivet nut in the middle of the workpiece, and the repair mechanism comprises: a first clamping plate, the first clamping plate is fixedly connected to the front end of the left side wall of the workbench, and a first socket is provided in the middle of the upper surface of the first clamping plate; a base is installed on the lower surface of the first clamping plate, and the base corresponds to the position of the first socket; an ejection hydraulic cylinder is installed at the bottom center of the base; the ejector pin is installed at the output end of the ejection hydraulic cylinder; a rotating assembly is installed at the rear center of the first clamping plate; a second clamping plate is installed at the top end of the rotating assembly, and a second socket is provided in the middle of the upper surface of the second clamping plate.

[0011] Preferably, when the second clamping plate rotates to be directly above the first clamping plate, the second insertion hole and the first insertion hole are located on the same vertical line.

[0012] Preferably, the purpose is to fix the second clamping plate after rotation, and the rotating assembly includes: a base, which is fixedly connected to the rear center position of the first clamping plate, and the bottom of the inner cavity of the base is provided with slots equidistantly along the circumferential direction; the rotating shaft is rotatably installed at the center position of the bottom end of the inner cavity of the base through a bearing; the sleeve is installed at the top end of the rotating shaft, and the inner wall of the sleeve is provided with teeth in the up and down directions, and the outer wall of the sleeve is fixedly connected to the front side of the second clamping plate; the spring and the gear are inserted into the inner cavity of the sleeve from top to bottom, and the outer wall of the gear is inserted into the teeth; there are two protrusions, which are fixedly connected to the bottom end of the gear with left and right positions opposite to each other, and the protrusion on the gear is inserted into the inner cavity of the slot under the action of the spring.

[0013] Preferably, the protrusion is in an arc shape.

[0014] The riveting method of the above device comprises the following steps:

[0015] Step 1: Position and debug the workpiece. Lift the handle, use the support rod as the rotation center, and push the handle to lift the U-shaped frame. The suction cup will be separated from the support platform, and the baffle will be released. Place the workpiece on the support platform first, and insert the workpiece riveting hole on the riveting die. Move the baffle through the slider, and rotate the baffle according to the shape of the workpiece. Use the baffles at different positions on the support platform to clamp the workpiece. Press the handle down, and the pressure rod drives the U-shaped frame to press the suction cup down. The suction cup is adsorbed on the support platform to position the baffle. The workpiece positioning and debugging are completed. Through the limiting effect of the baffle, when the workpiece is placed on the support platform, the riveting hole of the workpiece is just on the riveting die. The operation is simple.

[0016] Step 2: The controller drives the punching machine to move, the punch moves down to punch the rivet nut, and the rivet nut is embedded in the rivet hole of the workpiece to realize the rivet processing of the workpiece;

[0017] Step 3: Position the rivet nut on the workpiece before taking it out. Place the workpiece on the upper surface of the first clamping plate, move the workpiece so that the rivet nut is directly above the first plug hole.

[0018] Step 4: Rotate the second clamping plate to cause the sleeve and the rotating shaft to rotate synchronously. Under the limiting action of the tooth groove on the gear, the sleeve torque pulls the gear to rotate. Since the protrusion is arc-shaped, the protrusion can freely escape from the slot until the second clamping plate covers the upper surface of the workpiece. The spring provides a downward elastic force for the gear to cause the protrusion to be inserted into the slot at the corresponding position, so that the sleeve is fixed, and then the second clamping plate is fixed;

[0019] Step 5: The ejector pin is pushed upward by the ejector hydraulic cylinder, and the ejector pin ejects the rivet nut from the workpiece, thereby achieving the purpose of removing the rivet nut so that the workpiece can be reprocessed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention can make the pressure rod swing up and down by moving the handle up and down, so that the suction cup can be adsorbed on the supporting platform. With the assistance of the slider, the baffle is moved and rotated and then fixed, so that the workpiece is limited by multiple baffles, which has the function of workpiece positioning, and is conducive to the staff to align the riveting hole of the workpiece with the riveting die, which can relieve the visual fatigue of the staff and will not cause arm pain to the staff, and the riveting quality of the horizontal riveting of the workpiece can be guaranteed;

[0022] 2. The present invention provides a downward elastic force for the gear through the spring elastic force, so that the projection of the sleeve can be inserted into the slot at the corresponding position after rotation, and the second clamping plate can be fixed after rotation, so that the first clamping plate and the second clamping plate can cooperate to limit the workpiece. The ejector pin is driven upward by the ejection hydraulic cylinder, and the ejector pin ejects the rivet nut on the workpiece. The rivet nut ejection function is provided, and the re-rivet of the workpiece saves time and effort, improves the qualified rate, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the positioner of the present invention;

[0025] Figure 3 It is a left side cross-sectional view of the positioner of the present invention;

[0026] Figure 4 This is a schematic diagram of the repair mechanism structure of the present invention;

[0027] Figure 5 It is a front cross-sectional view of the repair mechanism of the present invention;

[0028] Figure 6 It is a front cross-sectional view of the rotating assembly of the present invention;

[0029] Figure 7 It is a bottom view of the gear of the present invention.

[0030] In the figure: 1-workbench, 2-punch, 3-controller, 4-automatic feeder, 5-riveting die, 6-support platform, 7-locator, 8-repair mechanism, 71-guide rail, 72-slider, 73-baffle, 74-pressure rod, 75-support rod, 76-handle, 77-U-shaped frame, 78-suction cup, 81-first clamping plate, 82-first socket, 83-base, 84-ejection hydraulic cylinder, 85-throw pin, 86-rotating assembly, 87-second clamping plate, 88-second socket, 861-base, 862-slot, 863-rotating shaft, 864-sleeve, 865-tooth groove, 866-spring, 867-gear, 868-bump. Implementation

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention provides a technical solution: an automatic riveting device for sheet metal processing, such as Figure 1-3 As shown, it includes a workbench 1, a punching machine 2, a controller 3, an automatic feeder 4 and a riveting die 5. The punching machine 2 is installed on the rear side of the upper surface of the workbench 1, the controller 3 is installed at the right rear corner of the upper surface of the workbench 1, and the controller 3 is electrically connected to the punching machine 2, the automatic feeder 4 is installed on the upper surface of the workbench 1, and the automatic feeder 4 is located directly below the punching machine 2, the automatic feeder 4 is electrically connected to the controller 3, and the riveting die 5 is installed on the top front side of the automatic feeder 4, and also includes a support platform 6, a positioner 7 and a repair mechanism 8. The support platform 6 is installed at the right front corner of the upper surface of the workbench 1, and the upper surface of the support platform 6 and the upper surface of the riveting die 5 are located at the same horizontal plane; there are several positioners 7, which are installed in two rows from left to right on the upper surface of the support platform 6; the repair mechanism 8 is installed on the left side wall of the workbench 1;

[0033] The controller 3 drives the punching machine 2 to move, and the punch moves downward to punch the rivet nut, so that the rivet nut is embedded in the rivet hole of the workpiece, thereby realizing the rivet processing of the workpiece;

[0034] like Figure 2 and 3As shown, the positioner 7 includes a guide rail 71, a slider 72, a baffle 73, a pressure rod 74, a support rod 75, a handle 76, a U-shaped frame 77 and a suction cup 78. The guide rail 71 is embedded in the top of the support platform 6, and the inner cavity of the guide rail 71 is dovetail-shaped to prevent the slider 72 from detaching from the guide rail 71; the slider 72 can be inserted in the inner cavity of the guide rail 71 so as to slide back and forth, and the movement of the baffle 73 is realized by the slider 72 sliding in the guide rail 71; the baffle 73 is rotatably installed on the top of the slider 72 through a pin shaft, and the baffle 73 plays a limiting role on the workpiece. The tops of the opposite surfaces of the baffles 73 on the two positioners 7 facing each other are inclined surfaces, and the space surrounded by the baffles 73 is from top to bottom. The U-shaped frame 77 is installed at the front end of the pressure rod 74; the pressure rod 74 can be rotatably installed at the left end of the front side of the baffle 73 through the pin shaft, and supports the U-shaped frame 77; the support rod 75 is installed at the right end of the front side of the baffle 73; the handle 76 is sleeved on the outer wall of the support rod 75, and a slide is provided on the left side of the handle 76, and the slide is movably connected to the pressure rod 74, so that the pressure rod 74 can be pulled when the pressure rod 74 swings up and down, and the pressure rod 74 passes through the inner cavity of the slide; the U-shaped frame 77 is installed at the front end of the pressure rod 74; there are two suction cups 78, which are respectively installed at both ends of the U-shaped frame 77, and the suction cups 78 are adsorbed on the upper surface of the support platform 6 to position the baffle 73;

[0035] To position and debug the workpiece, lift the handle 76, use the support rod 75 as the rotation center, and push the handle 76 to lift the U-shaped frame 77, so that the suction cup 78 is separated from the support platform 6, and the positioning of the baffle 73 is released. First, place the workpiece on the support platform 6, and the workpiece riveting hole is inserted into the riveting die 5. Move the baffle 73 through the slider 72, and rotate the baffle 73 according to the shape of the workpiece. Use the baffles 73 at different positions on the support platform 6 to clamp the workpiece. Press down the handle 76, and the pressure rod 74 drives the U-shaped frame 77 to press down the suction cup 78. The suction cup 78 is adsorbed on the support platform 6 to position the baffle 73. The workpiece positioning and debugging is completed. Through the limiting effect of the baffle 73, when the workpiece is lowered onto the support platform 6, the riveting hole of the workpiece is just on the riveting die 5, and the operation is simple.

[0036] As a preferred solution, further, the upper surfaces of the support platform 6, the guide rail 71 and the slider 72 are all on the same horizontal plane, so that when the workpiece is placed on the support platform 6, it is ensured that the workpiece will not seesaw.

[0037] As a preferred solution, further, Figure 4 and 5As shown, the repair mechanism 8 includes a first clamping plate 81, a first plug hole 82, a base 83, an ejection hydraulic cylinder 84, an ejector pin 85, a rotating assembly 86, a second clamping plate 87 and a second plug hole 88. The first clamping plate 81 is fixedly connected to the front end of the left side wall of the workbench 1 for placing the workpiece. The first plug hole 82 is opened in the middle of the upper surface of the first clamping plate 81; the base 83 is installed on the lower surface of the first clamping plate 81, and the base 83 corresponds to the first plug hole 82; the ejection hydraulic cylinder 84 is installed at the bottom center of the base 83; the ejector pin 85 is installed at the output of the ejection hydraulic cylinder 84 The output end; the rotating component 86 is installed at the rear center position of the first clamping plate 81; the second clamping plate 87 is installed at the top end of the rotating component 86, and the workpiece is clamped by the cooperation of the first clamping plate 81 and the second clamping plate 87, and a second plug hole 88 is opened in the middle of the upper surface of the second clamping plate 87. When the second clamping plate 87 rotates to the top of the first clamping plate 81, the second plug hole 88 and the first plug hole 82 are located on the same vertical line, and the first plug hole 82 and the second plug hole 88 are used to reserve a moving space for the ejector pin 85. The outer diameter of the ejector pin 85 is smaller than the riveting hole of the workpiece to prevent the ejector pin 85 from damaging the workpiece when working.

[0038] As a preferred solution, further, Figure 6 and 7 As shown, the rotating assembly 86 includes a base 861, a slot 862, a rotating shaft 863, a sleeve 864, a tooth groove 865, a spring 866, a gear 867 and a protrusion 868. The base 861 is fixedly connected to the rear center of the first clamping plate 81, and the bottom of the inner cavity of the base 861 is provided with slots 862 equidistantly along the circumferential direction. The base 861 and the first clamping plate 81 are integrated into one, so that the slots 862 and the protrusion 868 cooperate to position the sleeve 864; the rotating shaft 863 is rotatably installed at the center of the bottom end of the inner cavity of the base 861 through a bearing; the sleeve 864 is installed at the top of the rotating shaft 863, and the inner wall of the sleeve 864 is provided with a tooth groove 865 in the up and down direction. The tooth groove 865 plays a role in limiting the gear 867, so that the gear 867 can move up and down while also Following the rotation of sleeve 864, the outer wall of sleeve 864 is fixedly connected to the front side of second clamping plate 87; spring 866 and gear 867 are inserted into the inner cavity of sleeve 864 from top to bottom, and the outer wall of gear 867 is inserted into tooth groove 865, spring 866 provides a downward elastic force for gear 867 to ensure that protrusion 868 can stay stably in slot 862; there are two protrusions 868, which are fixedly connected to the bottom end of gear 867 in opposite positions on the left and right, and under the action of spring 866, the protrusion 868 on gear 867 is inserted into the inner cavity of slot 862; the shape of protrusion 868 is arc-shaped, when sleeve 864 rotates, gear 867 rotates with sleeve 864, and the protrusion 868 is pressed upward under the resistance of slot 862, so that the protrusion 868 can freely enter and exit slot 862;

[0039] Position the rivet nut on the workpiece before taking it out. Place the workpiece on the upper surface of the first clamping plate 81, and move the workpiece so that the rivet nut is directly above the first insertion hole 82.

[0040] The second clamping plate 87 is rotated to cause the sleeve 864 and the rotating shaft 863 to rotate synchronously. Under the limiting action of the tooth groove 865 on the gear 867, the sleeve 864 torsional pulls the gear 867 to rotate. Since the protrusion 868 is arc-shaped, the protrusion 868 can freely escape from the slot 862 until the second clamping plate 87 covers the upper surface of the workpiece. The spring 866 provides a downward elastic force for the gear 867, causing the protrusion 868 to insert into the slot 862 at the corresponding position, and the sleeve 864 is fixed, thereby fixing the second clamping plate 87.

[0041] The ejector pin 85 is pushed upward by the ejector hydraulic cylinder 84, and the ejector pin 85 ejects the rivet nut from the workpiece, thereby achieving the purpose of disassembling the rivet nut so that the workpiece can be reprocessed.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic riveting device for sheet metal processing, comprising a workbench (1), a punching machine (2), a controller (3), an automatic feeder (4) and a riveting die (5), wherein the punching machine (2) is mounted on the rear side of the upper surface of the workbench (1), the controller (3) is mounted at the right rear corner of the upper surface of the workbench (1), and the controller (3) is electrically connected to the punching machine (2), the automatic feeder (4) is mounted on the upper surface of the workbench (1), and the automatic feeder (4) is located directly below the punching machine (2), the automatic feeder (4) is electrically connected to the controller (3), and the riveting die (5) is mounted on the top front side of the automatic feeder (4), It is characterized in that Also includes: A support platform (6) is mounted on the right front corner of the upper surface of the workbench (1), and the upper surface of the support platform (6) and the upper surface of the riveting die (5) are located on the same horizontal plane; A plurality of positioners (7) are installed in two rows from left to right on the upper surface of the support platform (6); A repair mechanism (8) mounted on the left side wall of the workbench (1); The positioner (7) comprises: A guide rail (71) is embedded in the top of the support platform (6), and the inner cavity of the guide rail (71) is dovetail-shaped; A slider (72) is inserted into the inner cavity of the guide rail (71) so as to slide forward and backward; A baffle (73) rotatably mounted on the top of the slider (72) via a pin; A pressure rod (74) rotatably mounted on the front left end of the baffle (73) via a pin; A support rod (75) mounted on the front right end of the baffle (73); A handle (76) is sleeved on the outer wall of the support rod (75), and a slideway is provided on the left side of the handle (76), and the pressure rod (74) passes through the inner cavity of the slideway; A U-shaped frame (77) mounted on the front end of the pressure rod (74); Two suction cups (78) are respectively installed at two ends of the U-shaped frame (77), and the suction cups (78) are adsorbed on the upper surface of the support platform (6) to position the baffle (73); The repair mechanism (8) comprises: A first clamping plate (81) is fixedly connected to the front end of the left side wall of the workbench (1), and a first insertion hole (82) is provided in the middle of the upper surface of the first clamping plate (81); A base (83) is mounted on the lower surface of the first clamping plate (81), and the base (83) corresponds to the first plug hole (82); An ejection hydraulic cylinder (84) is installed at the center of the bottom end of the base (83); An ejector pin (85) is mounted on the output end of the ejection hydraulic cylinder (84); A rotating assembly (86) mounted at a rear center position of the first clamping plate (81); The second clamping plate (87) is mounted on the top end of the rotating assembly (86), and a second insertion hole (88) is provided in the middle of the upper surface of the second clamping plate (87).

2. An automatic riveting device for sheet metal processing according to claim 1, It is characterized in that The tops of the opposing surfaces of the baffles (73) on the two front and rear opposing positioners (7) are inclined surfaces.

3. The automatic riveting device for sheet metal processing according to claim 2, It is characterized in that The upper surfaces of the support platform (6), the guide rail (71) and the slide block (72) are all on the same horizontal plane.

4. The automatic riveting device for sheet metal processing according to claim 3, It is characterized in that When the second clamping plate (87) rotates to be directly above the first clamping plate (81), the second insertion hole (88) and the first insertion hole (82) are located on the same vertical line.

5. The automatic riveting device for sheet metal processing according to claim 4, It is characterized in that The rotating assembly (86) comprises: A base (861) is fixedly connected to the rear center of the first clamping plate (81), and the bottom of the inner cavity of the base (861) is provided with slots (862) equidistantly arranged along the circumferential direction; A rotating shaft (863) is rotatably mounted at the center of the bottom end of the inner cavity of the base (861) via a bearing; A sleeve (864) is mounted on the top end of the rotating shaft (863), and the inner wall of the sleeve (864) is provided with tooth grooves (865) in the up-down direction, and the outer wall of the sleeve (864) is fixedly connected to the front side of the second clamping plate (87); The spring (866) and the gear (867) are inserted into the inner cavity of the sleeve (864) from top to bottom, and the outer wall of the gear (867) is inserted into the tooth groove (865); There are two protrusions (868) which are fixedly connected to the bottom end of the gear (867) in opposite positions on the left and right. Under the action of the spring (866), the protrusions (868) on the gear (867) are inserted into the inner cavity of the slot (862).

6. An automatic riveting device for sheet metal processing according to claim 5, It is characterized in that The protrusion (868) is in an arc shape.

7. The riveting method of the automatic riveting device for sheet metal processing according to claim 6, It is characterized in that The following steps are involved: Step 1, workpiece positioning and debugging, lift the handle (76), take the support rod (75) as the rotation center, cause the handle (76) to lift the U-shaped frame (77), the suction cup (78) is separated from the support platform (6), and the positioning of the baffle (73) is released. First, the workpiece is placed on the support platform (6), and the workpiece pressure riveting hole is inserted into the pressure riveting mold (5), the baffle (73) is moved by the slider (72), and the baffle (73) is rotated according to the shape of the workpiece, and the baffle (73) at different positions on the support platform (6) is used to clamp the workpiece, and the handle (76) is pressed down, and the pressure rod (74) drives the U-shaped frame (77) to press the suction cup (78), and the suction cup (78) is adsorbed on the support platform (6), and the baffle (73) is positioned, and the workpiece positioning and debugging is completed. Through the limiting effect of the baffle (73), when the workpiece is placed on the support platform (6), the pressure riveting hole of the workpiece is just on the pressure riveting mold (5), and the operation is simple; Step 2: The controller (3) drives the punching machine (2) to move, and the punch moves downward to punch the rivet nut, so that the rivet nut is embedded in the rivet hole of the workpiece, thereby completing the rivet processing of the workpiece; Step three, positioning the rivet nut on the workpiece before taking it out, placing the workpiece on the upper surface of the first clamping plate (81), moving the workpiece so that the rivet nut is located directly above the first insertion hole (82); Step 4: Rotate the second clamping plate (87) to cause the sleeve (864) and the rotating shaft (863) to rotate synchronously. Under the limiting action of the tooth groove (865) on the gear (867), the sleeve (864) torsional forces the gear (867) to rotate. Since the protrusion (868) is arc-shaped, the protrusion (868) can freely escape from the slot (862) until the second clamping plate (87) covers the upper surface of the workpiece. The spring (866) provides a downward elastic force for the gear (867), causing the protrusion (868) to be inserted into the slot (862) at the corresponding position. The sleeve (864) is fixed, thereby fixing the second clamping plate (87). Step 5: The ejector pin (85) is pushed upward by the ejector hydraulic cylinder (84), and the ejector pin (85) ejects the rivet nut from the workpiece, thereby achieving the purpose of removing the rivet nut so that the workpiece can be reprocessed.

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