Hot melt drill rivet connection equipment system and rivet

Abstract

The application discloses a hot melt drilling and riveting connecting equipment system, which comprises a drilling and riveting unit, the drilling and riveting unit comprises a feeding servo motor, a tightening servo motor mounting seat, a transmission structure and a floating nozzle assembly, the output end of the feeding servo motor is connected with the body of the transmission structure, the output end of the tightening servo motor is connected with the input end of the transmission structure, the transmission structure comprises a plum blossom sleeve, and the plum blossom sleeve extends into the floating nozzle assembly; one side of the mounting seat is connected with the tail end of a manipulator, the feeding servo motor and the tightening servo motor are arranged on the side of the mounting seat close to the manipulator, and the feeding servo motor and the tightening servo motor are coaxial with the plum blossom sleeve. The application further discloses a hot melt drilling and riveting connecting rivet. The feeding servo motor and the tightening servo motor of the application are both rear-mounted structures, the spacing between the axial lines of the main shaft, the sleeve connecting rod and the plum blossom sleeve and the transmission structure is smaller than that in the prior art, so that the drilling and riveting operation can be smoothly completed in a more narrow structural space.

Description

Technical Field

[0001] This invention relates to the field of riveting equipment, and particularly to a thermoforming riveting connection equipment system and rivets. Background Technology

[0002] Friction Drilling Screw (FDS) is a threaded fastening and riveting process used in automotive lightweight manufacturing for joining aluminum or steel sheets with enclosed cavity materials such as aluminum alloy profiles and aluminum castings. Its principle is to use the heat generated by the high-speed rotation of the rivet to melt the combined materials, while simultaneously increasing pressure to penetrate the materials and create threads, thus fixing two or more layers of sheet metal together.

[0003] However, the existing FDS riveting technology and equipment have the following defects: 1. In the existing friction heat fusion riveting equipment, the feed servo motor or tightening servo motor is set coaxially with the spline sleeve, which results in a large distance between the axis of the spline sleeve and the sleeve connecting rod and the edge of the feed servo motor away from the connecting flange. This affects the riveting unit's ability to smoothly enter and exit some narrow and compact spaces to complete the riveting operation; 2. The existing rivets lack heat dissipation structure. During riveting, the heat generated by the high-speed friction between the rivet and the workpiece will affect the riveting quality and life of the rivet.

[0004] Therefore, there is an urgent need for a small-sized hot melt riveting FDS device, as well as rivets with heat dissipation structures. Summary of the Invention

[0005] The main objective of this invention is to propose a thermoplastic drilling and riveting connection equipment system and rivets, which aims to solve the technical problems of existing thermoplastic drilling and riveting FDS equipment being too large, affecting the riveting unit's drilling and riveting operations in a confined space, and the technical problem of existing rivets lacking heat dissipation structures.

[0006] To achieve the above objectives, the present invention proposes a hot-melt drilling and riveting connection equipment system, comprising a drilling and riveting unit, wherein the drilling and riveting unit includes a feed servo motor and a tightening servo motor; the drilling and riveting unit further includes a mounting base, a transmission structure, and a floating nozzle assembly, wherein the transmission structure and the floating nozzle assembly are movably mounted on the mounting base, the output end of the feed servo motor is connected to the body of the transmission structure, the output end of the tightening servo motor is connected to the input end of the transmission structure, the transmission structure includes a pentagonal sleeve, the output end of the transmission structure is connected to one end of the pentagonal sleeve, and the pentagonal sleeve is located inside the floating nozzle assembly;

[0007] One side of the mounting base is connected to the end of the robot arm. The feed servo motor and the tightening servo motor are located on the side of the mounting base near the robot arm, and the feed servo motor and the tightening servo motor are off-axis from the sleeving.

[0008] Optionally, it also includes a nail feeding mechanism. The drilling and riveting unit also includes a three-station rotary hopper. The three-station rotary hopper includes a second receiving head, a second discharging head, a conversion pipe, and a rotary cylinder. The output end of the rotary cylinder is connected to one side of the conversion pipe.

[0009] The output end of the nail feeding mechanism is connected to the second receiving head. The conversion tube includes an open end and a closed end. The rotary cylinder drives the conversion tube to rotate to a 0° state, a 45° state, or a 90° state. When the conversion tube is in the 0° state, the open end of the conversion tube is connected to the second discharge head. When the conversion tube is in the 45° state, the open end of the conversion tube is disconnected from the second discharge head and the second receiving head. When the conversion tube is in the 90° state, the open end of the conversion tube is connected to the second receiving head.

[0010] Optionally, the three-station rotary hopper further includes a conversion housing, the conversion pipe is installed inside the conversion housing, and the conversion housing is provided with a transparent observation plate.

[0011] Optionally, the floating nozzle assembly and the three-station rotary hopper are both located at the lower part of the mounting base. The floating nozzle assembly includes a first receiving head, which is connected to a second discharging head.

[0012] Optionally, the drilling and riveting unit further includes a centerline I / O module and a communication valve island. Both the centerline I / O module and the communication valve island are mounted on a mounting base. The centerline I / O module is controlled and connected to the feed servo motor and the tightening servo motor, and the communication valve island is controlled and connected to the rotary cylinder.

[0013] Optionally, the floating nozzle assembly includes a fixed structure, a floating structure, and a floating spring. The fixed structure is movably mounted on the mounting base, and the floating structure is movably mounted on the fixed structure.

[0014] The transmission structure includes a guide rod, the floating spring is disposed between the fixed structure and the floating structure, and the floating structure includes a gripper body, the gripper body carrying the rivet body to be drilled and riveted.

[0015] The guide rod moves downward with the transmission structure and then stops, abutting against the upper end of the floating spring. The floating spring is first over-compressed and then elastically rebounds, causing it to oscillate and float. The gripper body and rivet body float up and down with the deformation of the floating spring.

[0016] Optionally, the fixing structure includes a nozzle side plate and a nozzle body. The nozzle side plate is movably mounted on the mounting base, and the nozzle body is fixed to the nozzle side plate. The nozzle body has a through hole, and the plum blossom sleeve is located inside the through hole.

[0017] The gripper body is movably sleeved on the lower part of the nozzle body, and the rivet body moves to the gripper body through the through hole.

[0018] Optionally, the floating structure further includes a nozzle cover plate, a nozzle sleeve, and a gripper cylinder. The nozzle sleeve is movably sleeved on the nozzle body. The nozzle cover plate is located at the upper end of the nozzle sleeve. The floating spring is located between the nozzle cover plate and the nozzle side plate. The gripper body is located at the lower part of the nozzle sleeve. The output end of the gripper cylinder is connected to the gripper body.

[0019] The present invention also discloses a thermoplastic riveting connection rivet, which is installed by the above-mentioned thermoplastic riveting connection equipment system. The rivet body includes a threaded part, a smooth part and a rivet head; the rivet body also includes a four-sided rivet tip, which is a four-sided pyramid shape, and the top of the rivet head is octagonal and has a guide bevel.

[0020] Optionally, the rivet body further includes several vertical grooves, which are evenly distributed along the circumference of the rivet body. The vertical grooves are arranged along the length of the rivet body, and a portion of the vertical grooves is located inside the threaded portion and another portion is located inside the smooth portion.

[0021] The included angle between two adjacent edges of the four-sided nail tip is 135°.

[0022] The technical solution of this invention has the following beneficial effects:

[0023] 1. Both the feed servo motor and the tightening servo motor are rear-mounted. The distance from the centerlines of the aforementioned spindle, sleeve connecting rod, and plum blossom sleeve to the edge of the transmission structure away from the connecting flange is greater than the distance from the centerlines of these three components to the edge of the feed servo motor or tightening servo motor of this invention away from the connecting flange. Furthermore, the distance from the centerlines of these three components to the transmission structure is smaller than the distance from the centerlines of the sleeve connecting rod and plum blossom sleeve to the edge of the feed servo motor or tightening servo motor away from the connecting flange in the prior art, decreasing to the range of 27mm~31mm. Therefore, this facilitates the successful completion of drilling and riveting operations in a more confined structural space using the hot melt drilling and riveting connection equipment system of this invention.

[0024] 2. The tip of the four-sided rivet is shaped like a four-sided pyramid. This design increases the friction surface and accelerates heat dissipation during piercing, thereby ensuring the riveting quality of the rivet body and extending its service life. In addition, the top of the rivet head is octagonal and has a guide bevel. This design helps to improve the success rate of the splice sleeve in the first or second head-finding operation, further shortening the operation time and increasing the work cycle. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a hot-melt drilling and riveting connection equipment system according to the present invention;

[0027] Figure 2 This is a schematic diagram of the drilling and riveting unit in a thermoplastic drilling and riveting connection equipment system of the present invention. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the drilling and riveting unit in a thermoplastic drilling and riveting connection equipment system of the present invention. Figure 2 ;

[0029] Figure 4 This is a partial cross-sectional view of the drilling and riveting unit in a thermoplastic drilling and riveting connection equipment system of the present invention. Figure 1 ;

[0030] Figure 5 This is a partial cross-sectional view of the drilling and riveting unit in a thermoplastic drilling and riveting connection equipment system of the present invention. Figure 2 ;

[0031] Figure 6 This is a schematic diagram of the floating nozzle assembly in a hot melt riveting connection equipment system according to the present invention;

[0032] Figure 7 This is an exploded structural diagram of the floating nozzle assembly in a hot melt riveting connection equipment system of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of a three-station rotating hopper in a hot-melt drilling and riveting connection equipment system of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of a thermoplastic riveting connection rivet according to the present invention. Figure 1 ;

[0035] Figure 10 This is a schematic diagram of the structure of a thermoplastic riveting connection rivet according to the present invention. Figure 2 .

[0036] Reference numerals in the attached diagrams are as follows: Drilling and riveting unit 1, Feed servo motor 11, Tightening servo motor 12, Transmission structure 13, Spindle 131, Sleeve connecting rod 132, Plum blossom sleeve 133, Guide rod 134, Floating nozzle assembly 14, Nozzle cover plate 141, Floating spring 1411, Nozzle side plate 142, Nozzle body 143, Nozzle sleeve 144, Discharge nozzle 145, Gripper cylinder 146, Inclined feed channel 147, First receiving head 148, Gripper body 149. 1491 Claw plate, 15 Three-position rotary hopper, 151 Second receiving head, 152 Rotary cylinder, 153 Observation plate, 154 Hopper mounting bracket, 155 Conversion housing, 16 Cylinder pre-compression mechanism, 17 Centerline I / O module, 18 Communication valve island, 19 Connecting flange, 191 Mounting base, 2 Nail feeding mechanism, 3 Electrical control unit, 4 Riveting quality monitoring unit, 5 Rivet body, 51 Threaded part, 52 Smooth part, 53 Nail head, 54 Vertical groove, 55 Four-sided nail tip.

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] This invention proposes a hot-melt drilling and riveting connection equipment system.

[0042] like Figures 1 to 8As shown in Embodiment 1 of the present invention, the hot-melt riveting connection equipment system includes a riveting unit 1, a rivet feeding mechanism 2, an electrical control unit 3, and a riveting quality monitoring unit 4. Specifically, the riveting unit 1 includes a feed servo motor 11, a tightening servo motor 12, a receiving component, a connecting flange 19, a mounting base 191, a transmission structure 13, and a floating nozzle assembly 14. The rivet feeding mechanism 2 includes a feeding pipe, which is connected to the receiving component to transport the rivet body 5. Furthermore, the electrical control system is a PLC (Programmable Logic Controller), which is connected to the riveting unit 1, the rivet feeding mechanism 2, and the riveting quality monitoring unit 4 via cables to automate the riveting operation of the hot-melt riveting connection equipment system. The riveting quality monitoring unit 4 is mounted on the riveting unit 1 to monitor the riveting quality. Since the rivet feeding mechanism 2, the electrical control unit 3, and the riveting quality monitoring unit 4 are mature existing technologies, they will not be described in detail in this embodiment.

[0043] Furthermore, a slide rail is provided on the mounting base 191, and the transmission structure 13 and the floating nozzle assembly 14 are respectively set on the slide rail. The output end of the feed servo motor 11 is connected to the body of the transmission structure 13 and the tightening servo motor 12, thereby driving the transmission structure 13 and the tightening servo motor 12 to move back and forth along the slide rail. In Embodiment 1, the tightening servo motor 12 and the feed servo motor 11 are arranged side-by-side. The feed servo motor 11 drives the tightening servo motor 12 and the transmission structure 13 to reciprocate along the slide rail via a lead screw structure. The output end of the tightening servo motor 12 is connected to the input end of the transmission structure 13. The output end of the transmission structure 13 includes a main shaft 131, a sleeve connecting rod 132, and a plum blossom sleeve 133, which are connected in sequence. The sleeve connecting rod 132 and the plum blossom sleeve 133 reciprocate within the floating nozzle assembly 14 along with the transmission structure 13, thereby pressing down to engage with the rivet head 53 of the rivet body 5, or moving upward to allow the rivet body 5 conveyed by the rivet feeding mechanism 2 to enter the floating nozzle assembly 14. Since the lead screw structure and transmission structure described above are mature existing technologies, they will not be described in detail in this embodiment.

[0044] Furthermore, one side of the mounting base 191 is connected to one side of the connecting flange 19, and the other side of the connecting flange 19 is connected to the end of the robot arm, thereby driving the drilling and riveting unit 1 through the robot arm. The aforementioned feed servo motor 11 and tightening servo motor 12 are disposed on the side of the mounting base 191 near the robot arm, and the feed servo motor 11 and tightening servo motor 12 are off-axis from the aforementioned spindle 131, sleeve connecting rod 132 and plum blossom sleeve 133.

[0045] In this invention, both the feed servo motor 11 and the tightening servo motor 12 are rear-mounted structures. The distance from the centerlines of the aforementioned spindle 131, sleeve connecting rod 132, and plum blossom sleeve 133 to the edge of the transmission structure 13 away from the connecting flange 19 is greater than the distance from the centerlines of these three components to the edge of the feed servo motor 11 or tightening servo motor 12 away from the connecting flange 19. Furthermore, the distance from the centerlines of these three components to the transmission structure 13 is smaller than the distance from the centerlines of the sleeve connecting rod 132 and plum blossom sleeve 133 to the edge of the feed servo motor 11 or tightening servo motor 12 away from the connecting flange 19 in the prior art, decreasing to the range of 27mm to 31mm. Therefore, this facilitates the successful completion of drilling and riveting operations in a more confined structural space using the hot-melt drilling and riveting connection equipment system of this invention.

[0046] Optional, such as Figure 8 As shown, the above-mentioned drilling and riveting unit 1 also includes a three-position rotary hopper 15. The three-position rotary hopper 15 includes a hopper mounting bracket 154, a second receiving head 151, a second discharging head, a conversion pipe, a rotary cylinder 152, and a conversion housing 155. The output end of the rotary cylinder 152 is connected to one side of the conversion pipe. The present invention temporarily stores the rivet body 5 in the three-position rotary hopper 15, thereby preventing the rivet body 5 from flowing back from the floating nozzle assembly 14 into the feeding pipe when the drilling and riveting unit 1 is in a horizontal drilling and riveting state or an angled drilling and riveting state.

[0047] Specifically, the floating nozzle assembly 14 and the hopper mounting bracket 154 are both located at the lower part of the mounting base 191. The rotary cylinder 152 and the conversion housing 155 are mounted on the hopper mounting bracket 154. The second receiving head 151 is located at the top of the conversion housing 155, and the second discharging head is located on the side of the conversion housing 155 facing the floating nozzle assembly 14. The floating nozzle assembly 14 includes a first receiving head 148, and the first receiving head 148 and the second discharging head are connected by a pipe or directly. In this invention, the floating nozzle assembly 14 and the three-station rotary hopper 15 are both located at the lower part of the mounting base 191. When the drilling and riveting unit 1 moves by the robot, the three-station rotary hopper 15 can pre-store the rivet body 5 simultaneously. When the drilling and riveting unit 1 needs to be fed, the rivet body 5 is fed into the floating nozzle assembly 14. Compared with the prior art where the rivet feeding mechanism 2 directly feeds the material, this structure shortens the rivet body 5 conveying time, saves working cycle time, and improves work efficiency.

[0048] Furthermore, the output end of the aforementioned nail feeding mechanism 2 is connected to the second receiving head 151. The conversion tube includes an open end and a closed end. The rotary cylinder 152 can drive the conversion tube to rotate to a 0° state, a 45° state, or a 90° state. When the conversion tube is at 0°, the open end of the conversion tube is connected to the second discharge head. When the conversion tube is at 45°, the open end of the conversion tube is disconnected from both the second discharge head and the second receiving head 151. When the conversion tube is at 90°, the open end of the conversion tube is connected to the second receiving head 151. Through the above structure and operation, the three-station rotary hopper 15 can be switched between three station states to realize the operations of receiving, storing, and feeding materials, thereby achieving the above-mentioned effects, namely, preventing the rivet body 5 from flowing back from the floating nozzle assembly 14 into the feeding tube, shortening the conveying time of the rivet body 5, saving work cycle time, and improving work efficiency. It is worth noting that the three-station rotary hopper 15 uses a blowing method to transport the rivet body 5 from the conversion tube to the floating nozzle assembly 14. Since the structure and principle of the blowing method are mature existing technologies, they will not be described in detail in this embodiment.

[0049] Optionally, the aforementioned conversion housing 155 is provided with a transparent observation plate 153, through which the conversion tube and the rivet body 5 can be observed to confirm their status, thereby improving the convenience of maintenance and troubleshooting.

[0050] Optionally, the drilling and riveting unit 1 also includes a centerline I / O module and a communication valve island 18. Both the centerline I / O module and the communication valve island 18 are mounted on the mounting base 191. The centerline I / O module is controlled and connected to the feed servo motor 11, the tightening servo motor 12, and the gripper cylinder 146. The communication valve island 18 is controlled and connected to the rotary cylinder 152. Specifically, the aforementioned electronic control unit 3 controls the feed servo motor 11, the tightening servo motor 12, the gripper cylinder 146, and the rotary cylinder 152 respectively through the centerline I / O module and the communication valve island 18, thereby achieving automated control of the corresponding functional structures. Furthermore, compared to the wired rapid-connector and wired valve group used in the prior art, the centerline I / O module and communication valve island 18 used in this invention facilitate fault signal troubleshooting, reduce wiring connections, provide faster response, higher efficiency, smaller size, and simpler maintenance.

[0051] Optional, such as Figures 4 to 6As shown, the floating nozzle assembly 14 includes a fixed structure, a floating structure, and a floating spring 1411. The fixed structure is movably mounted on the slide rail of the mounting base 191, and the floating structure is movably mounted on the fixed structure. Specifically, the transmission structure 13 includes a guide rod 134, and the floating spring 1411 is disposed between the fixed structure and the floating structure. The floating structure includes two gripper bodies 149, and the rivet body 5 to be drilled and riveted is carried between the two gripper bodies 149. When the aforementioned feed servo motor 11 drives the transmission structure 13 to press down, the guide rod 134 moves down with the transmission structure 13 and then stops, abutting against the upper end of the floating spring 1411. The floating spring 1411 is first over-compressed and then elastically rebounds, causing oscillation and floating. The gripper bodies 149 and the rivet body 5 float up and down with the deformation of the floating spring 1411.

[0052] In this invention, the feed servo motor 11 drives the transmission structure 13 to press down to a predetermined position, while the tightening servo motor 12 drives the spindle 131, sleeve connecting rod 132, and plum blossom sleeve 133 to rotate. The process of the transmission structure 13 pressing down from above to the predetermined position is the first nut-finding process. During the first nut-finding process, the plum blossom sleeve 133 is pressed down with the transmission structure 13 to the nut 53 of the rivet body 5, and engages with the nut 53 by being driven to rotate by the tightening servo motor 12, so as to perform subsequent drilling and riveting operations. It is worth noting that after the plum blossom sleeve 133 engages with the nut 53, the floating structure will float due to the downward pressure of the transmission structure 13, but this does not affect the engagement relationship between the plum blossom sleeve 133 and the nut 53.

[0053] If the spline sleeve 133 fails to engage with the rivet head 53 when the transmission structure 13 is pressed down to the predetermined position, i.e., the first rivet head search operation fails, the second rivet head search operation is completed by the floating structure caused by the downward pressure of the transmission structure 13. Specifically, when the feed servo motor 11 drives the transmission structure 13 to press down, the guide rod 134 moves down with the transmission structure 13 and then stops, abutting against the upper end of the floating spring 1411. The floating spring 1411 is first over-compressed and then elastically rebounds, causing it to oscillate and float. The gripper body 149 and the rivet body 5 float up and down with the deformation of the floating spring 1411, thereby causing the lower end of the spline sleeve 133 and the rivet head 53 to repeatedly move away from each other and relatively close together with a small gap. During this process, since the spline sleeve 133 is continuously rotated by the tightening servo motor 12, it can engage with the rivet head 53 through the second rivet head search operation, so as to carry out the subsequent drilling and riveting operation. By setting a floating structure, the lower end of the plum blossom sleeve 133 and the rivet head 53 can be effectively prevented from colliding and causing wear due to failure to quickly and smoothly engage. This ensures the smooth progress of the drilling and riveting operation and extends the service life of the plum blossom sleeve 133 and the rivet body 5.

[0054] Optionally, the fixing structure includes a nozzle side plate 142, a nozzle body 143, a discharge nozzle 145, and an inclined feed channel 147. There are two nozzle side plates 142, which are movably mounted on the slide rails of the mounting base 191. The nozzle body 143 is fixed to the two nozzle side plates 142 and has a through hole into which the sleeve connecting rod 132 and the plum blossom sleeve 133 extend. Specifically, the inclined feed channel 147 is located on one side of the nozzle body 143, with one end connected to the first receiving head 148 and the other end connected to the through hole, thereby receiving the rivet body 5 conveyed by the three-station rotary hopper 15 and then transferring it to the gripper body 149. Furthermore, the gripper body 149 is movably sleeved on the lower part of the feed nozzle body 143, and the feed nozzle 145 is installed on the lower part of the feed nozzle body 143 and communicates with the through hole. The rivet body 5 moves to the gripper body 149 through the first receiving head 148, the inclined feed channel 147, and the through hole. During drilling and riveting, the lower end of the feed nozzle 145 first abuts against the combined material plate to be drilled and riveted. Then, the gripper body 149 opens so that the plum blossom sleeve 133 drives the rivet body 5 to press down and rotate, thereby causing the rivet to rotate at high speed so that the heat generated melts the combined material. At the same time, the pressure is increased to penetrate the combined material and make threads on the combined material. Finally, the drilling and riveting is completed to fix two or more layers of plates together.

[0055] Optionally, the floating structure also includes a nozzle cover plate 141, a nozzle sleeve 144, and a gripper cylinder 146. The gripper body 149 also includes a claw plate 1491. The claw plate 1491 limits the rivet head 53 of the rivet body 5, thereby achieving the effect of supporting the rivet body 5. The nozzle sleeve 144 is movably sleeved outside the nozzle body 143. The nozzle cover plate 141 is located at the upper end of the nozzle sleeve 144. The floating spring 1411 is located between the nozzle cover plate 141 and the nozzle side plate 142. The gripper body 149 is located at the lower part of the nozzle sleeve 144. The output end of the gripper cylinder 146 is connected to the two gripper bodies 149. When the feed servo motor 11 drives the transmission structure 13 to press down to the predetermined position, the guide rod 134 abuts against the nozzle cover plate 141, causing the floating spring 1411 to be over-compressed and then elastically rebound, causing it to oscillate and float. This causes the nozzle cover plate 141, nozzle sleeve 144, gripper cylinder 146, gripper body 149, and rivet body 5 to float up and down with the deformation of the floating spring 1411.

[0056] After the riveting unit 1 moves to the designated riveting point of the composite material, the plum blossom sleeve 133 has engaged with the nail head 53 through the first or second nut-finding operation. At this time, the feed servo motor 11 continues to press down until the floating structure has no floating margin, such as... Figure 4 The state shown. Then, the gripper cylinder 146 opens the gripper body 149, as shown. Figure 5The state shown is to avoid excessive wear between the rivet body 5 and the spline sleeve 133 and the jaw body 149 due to high-speed rotation during the hot melt piercing stage. During drilling and riveting, the tightening servo motor 12 and the feed servo motor 11 are controlled by the electronic control unit 3 to drive the spline sleeve 133 according to the process requirements until the drilling and riveting work is completed.

[0057] Optionally, the drilling and riveting unit 1 also includes a cylinder preload mechanism 16, which is located at the lower part of the mounting base 191, and the output end of the cylinder preload mechanism 16 is connected to the fixed structure of the floating nozzle assembly 14. When the drilling and riveting unit 1 moves to the set riveting point of the composite material, the cylinder preload mechanism 16 drives the nozzle mechanism to press down, thereby pressing the workpiece surface through the feed nozzle 145, eliminating the gap between the plates, which is beneficial for the drilling and riveting unit 1 to perform drilling and riveting operations and shorten the riveting cycle. Example

[0058] The difference between this embodiment and embodiment one is that the tightening servo motor 12 and the feed servo motor 11 are arranged side by side.

[0059] like Figures 9 to 10 As shown, this invention also discloses a thermoplastic riveting connection rivet, installed using the aforementioned thermoplastic riveting connection equipment system. The rivet body 5 includes a threaded portion 51, a smooth shank portion 52, a rivet head 53, and a four-sided rivet tip 55. The four-sided rivet tip 55 is a four-sided pyramidal shape. This design increases the friction surface and accelerates heat dissipation during piercing, thereby ensuring the riveting quality of the rivet body 5 and extending its service life. Specifically, the rivet head 53 has an octagonal top and a guide slope at the top. This design helps improve the success rate of the splice sleeve 133 in the first or second rivet head locating operation, further shortening the operation time and increasing the work cycle.

[0060] Optionally, the rivet body 5 also includes several vertical grooves 54, which are evenly distributed along the circumference of the rivet body 5. Specifically, the vertical grooves 54 are arranged along the length of the rivet body 5, with a portion of the grooves 54 located within the threaded portion 51 and another portion located within the smooth shank portion 52. This design further enhances the friction and heat dissipation capacity, improves the connection strength of the combined materials, and enables drilling and riveting connections between 2.1 mm thick 870 MPa high-strength steel and aluminum alloy profiles. The included angle between two adjacent edges of the aforementioned four-sided rivet tip 55 is 135°. This design helps to ensure the overall regularity of the shape of the four-sided rivet tip 55, thereby ensuring the drilling and riveting capability of the rivet body 5.

[0061] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A hot-melt rivet joining equipment system comprising a drill-rivet unit and a supply of rivets, the drill-rivet unit comprising a feed servo motor and a tightening servo motor; characterized in that: The drilling and riveting unit further comprises a mounting base, a transmission structure, a floating nozzle assembly and a three-station rotary magazine, the transmission structure and the floating nozzle assembly are movably arranged on the mounting base, the output end of the feeding servo motor is connected with the body of the transmission structure, the output end of the tightening servo motor is connected with the input end of the transmission structure, the transmission structure comprises a main shaft, a sleeve connecting rod and a key-shaped sleeve, the output end of the transmission structure is connected with one end of the key-shaped sleeve, and the key-shaped sleeve is located in the floating nozzle assembly; One side of the mounting base is connected with the end of the manipulator, the feeding servo motor and the tightening servo motor are arranged on the side of the mounting base close to the manipulator, and the feeding servo motor and the tightening servo motor are eccentric with the key-shaped sleeve; The floating nozzle assembly comprises a fixed structure, a floating structure and a floating spring, the fixed structure is movably arranged on the mounting base, and the floating structure is movably arranged on the fixed structure; The transmission structure comprises a guide rod, the floating spring is arranged between the fixed structure and the floating structure, the floating structure comprises a jaw body, and the jaw body bears the rivet body to be drilled and riveted; The guide rod is first lowered and then stopped to abut against the upper end of the floating spring, the floating spring is first excessively compressed and then elastically rebounds to oscillate and float, and the jaw body and the rivet body float up and down with the deformation of the floating spring; The fixed structure comprises a nozzle side plate and a nozzle body, the nozzle side plate is movably arranged on the mounting base, the nozzle body is fixed on the nozzle side plate, the nozzle body has a through hole, and the key-shaped sleeve is located in the through hole; The jaw body is movably sleeved on the lower part of the nozzle body, and the rivet body moves to the jaw body through the through hole; The floating structure further comprises a nozzle cover plate, a nozzle sleeve and a jaw cylinder, the nozzle sleeve is movably sleeved on the nozzle body, the nozzle cover plate is arranged on the upper end of the nozzle sleeve, the floating spring is arranged between the nozzle cover plate and the nozzle side plate, the jaw body is arranged on the lower part of the nozzle sleeve, and the output end of the jaw cylinder is connected with the jaw body; The three-station rotary magazine comprises a second material receiving head, a second material discharging head, a conversion pipe and a rotary cylinder, and the output end of the rotary cylinder is connected with one side of the conversion pipe; The distance from the axial center lines of the main shaft, the sleeve connecting rod and the key-shaped sleeve to the edge of the side of the transmission structure away from the connecting flange is greater than the distance from the axial center lines of the feeding servo motor or the tightening servo motor to the edge of the side of the transmission structure away from the connecting flange; The floating nozzle assembly and the three-station rotary magazine are arranged on the lower part of the mounting base, the floating nozzle assembly comprises a first material receiving head, and the first material receiving head is in communication with the second material discharging head; The output end of the staple feeding mechanism is communicated with the second material receiving head, the conversion pipe comprises an open end and a closed end, the rotary air cylinder drives the conversion pipe to rotate to a 0° state, a 45° state or a 90° state, when the conversion pipe is in the 0° state, the open end of the conversion pipe is communicated with the second material receiving head, when the conversion pipe is in the 45° state, the open end of the conversion pipe is disconnected with the second material receiving head and the second material receiving head, and when the conversion pipe is in the 90° state, the open end of the conversion pipe is communicated with the second material receiving head.

2. The hot-melt riveted connection assembly system of claim 1, wherein, The three-station rotary material bin further comprises a conversion housing, the conversion pipe is installed in the conversion housing, and the conversion housing is provided with a transparent observation plate.

3. The hot-melt rivet joining equipment system according to claim 1, characterized by The drilling and riveting unit further comprises a neutral line I / O module and a communication valve island, both of which are arranged on the mounting seat, the neutral line I / O module is in control connection with the feeding servo motor and the tightening servo motor, and the communication valve island is in control connection with the rotary air cylinder.

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