Split hot rivet head modular hot riveting apparatus

Abstract

The application relates to the technical field of hot riveting and discloses a split hot riveting head modular hot riveting equipment, which comprises an upper tool, a lower tool, a heating main body arranged at the bottom of the upper tool, a plurality of hot riveting heads arranged in a linear array at the bottom of the heating main body, a product arranged at the top of the lower tool, two groups of heating rods arranged at the two sides of the heating main body respectively, three groups of thermocouples arranged at the bottom of one side of the heating main body, and a heat conduction unit arranged on the hot riveting head. The heat conduction assembly, the reset assembly and the turnover assembly form a closed loop action, the heat conduction plate preheats the metal sheet through the heat conduction ring, and the connection is not firm and deformation caused by temperature difference is avoided; small deflection and turnover during hot riveting are separated, heat interference and overflow adhesion are avoided; the reset assembly pushes the material after hot riveting, so that the wire drawing is prevented, the hot riveting head is surrounded for heat preservation, and the product quality is guaranteed, the cycle is shortened, and the automation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of hot riveting technology, and more particularly to a modular hot riveting device with a split hot riveting head. Background Technology

[0002] The multi-point close-range hot riveting technology for small injection molded parts is mainly used in scenarios where metal sheets are fixed to injection molded parts with plastic protrusions by hot riveting. It is widely applicable to industries such as 3C, new energy, and medical equipment that have high requirements for connection accuracy and product consistency.

[0003] In existing technologies, plastic hot riveting mainly employs two methods: pulse-type and heating rod-type. If pulse-type hot riveting is used for multi-point hot riveting of small injection molded parts, multiple hot riveting processes are required, which leads to a significant increase in equipment costs or sacrifices in production cycle time, and also results in high maintenance costs. Heating rod-type hot riveting is mostly an integrated structure, using multiple sets of heating rods with a single temperature sensor for temperature control, which results in uneven temperature control accuracy and poor weld quality consistency.

[0004] Meanwhile, existing hot riveting equipment generally suffers from several core pain points: First, the temperature control method is crude, resulting in large temperature differences between riveting points during multi-point hot riveting, and a significant temperature difference between the metal sheet and the molten plastic, which can easily lead to axial loosening, detachment, or deformation of the metal sheet; second, the lack of an efficient preheating, avoidance, and material removal linkage mechanism can easily cause problems such as overflow, stringing, and adhesion, affecting product appearance and production efficiency. Therefore, there is an urgent need for a hot riveting device that combines precise temperature control, modular maintenance, and coordinated linkage actions to address the shortcomings of existing technologies in terms of quality consistency, maintenance costs, and production efficiency. Summary of the Invention

[0005] In view of the problems of existing hot riveting equipment, such as crude temperature control, lack of efficient linkage mechanism, unstable riveting quality, high product defect rate, insufficient production flexibility and easy generation of batch defective products, a modular hot riveting equipment with split hot riveting head is proposed.

[0006] Its purpose is to: precisely control temperature to ensure stable riveting quality, build a preheating, avoidance, and material removal linkage mechanism to reduce product defect rate, improve equipment adaptability through split and modular design, achieve rapid fault identification to avoid batch defects, and ultimately improve production efficiency.

[0007] The technical solution of the present invention is a modular hot riveting device with a split hot riveting head, including an upper tooling and a lower tooling, a heating body set at the bottom of the upper tooling, a plurality of hot riveting heads arranged in a linear array at the bottom of the heating body, a product set at the top of the lower tooling, and also including two sets of detachable heating rods respectively set on both sides of the heating body, three sets of thermocouples set at the bottom of one side of the heating body, and a heat conducting unit set on the hot riveting head.

[0008] The product consists of several plastic protrusions and a metal sheet embedded in the plastic protrusions. The heat-conducting unit includes a reset component disposed around the hot riveting head and a heat-conducting component disposed at the bottom of the reset component.

[0009] The heat-conducting assembly includes two heat-conducting plates disposed on both sides of the hot riveting head for preheating the metal sheet, and a heat-conducting ring disposed in the middle of the two heat-conducting plates, with the heat-conducting ring in close contact with the side wall of the hot riveting head;

[0010] The reset assembly is used to reset the heat-conducting assembly. The two heat-conducting plates are inclined arc-shaped at their close ends and horizontal at their far ends. The heat-conducting plates are semi-circular.

[0011] Furthermore, the two heat-conducting plates are bonded together to form a complete cylindrical shape that surrounds the heat-conducting riveting head.

[0012] Furthermore, the middle part of the heat-conducting ring is vertically aligned with the side wall of the heat-conducting head.

[0013] Furthermore, the reset assembly includes a reset groove formed on the periphery of the hot riveting head, a reset spring disposed in the reset groove, a reset plate disposed at the bottom of the reset spring, and connecting seats disposed on both sides of the bottom of the reset plate.

[0014] Furthermore, the heat-conducting component also includes a connecting plate disposed at the bottom of the connecting seat. The connecting plate and the connecting seat are rotatably connected by a rotating shaft, and a torsion spring is disposed between the connecting seat and the rotating shaft. The rotating shaft is fixedly connected to the connecting plate, and the bottom of the connecting plate is fixedly connected to the middle of the heat-conducting plate.

[0015] Furthermore, the heat-conducting plates are also provided with flipping components on both sides. The flipping components include flipping strips on both sides of the two heat-conducting plates, through holes on the side of the reset plate, and flipping posts on both sides of the reset groove. The intersection of the two flipping strips, the through holes, and the flipping posts are on the same vertical line.

[0016] Furthermore, the two flip bars are in an arc shape facing each other, and they are arranged in a staggered manner so as not to interfere with each other.

[0017] Furthermore, the bottom of the heat-conducting plate is extended and thickened inwards, and an inclined groove is formed along its inner wall.

[0018] Furthermore, the bottom of the reset groove is also provided with an expansion groove, and the connecting plate is arranged in an arc shape.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The heat-conducting component, reset component, and flipping component form a closed-loop operation. The heat-conducting plate first precisely preheats the metal sheet through the heat-conducting ring, solving the problems of weak connection and deformation caused by temperature difference. During hot riveting, it separates through slight deflection and flipping to avoid heat interference and material overflow adhesion. After hot riveting, the heat-conducting plate resets to push the product out of the box, eliminating problems of stringing and lifting, and also surrounding the hot riveting head for heat preservation and energy saving. No additional drive is required throughout the process, ensuring that the metal sheet is not deformed and the riveting points are formed neatly, while shortening the preheating and production cycle and improving the efficiency of automated production.

[0021] 2. The hot riveting head, as an independent execution unit, can be disassembled and replaced separately without disassembling the heating body or other components, reducing maintenance costs and time. The equipment is divided into functional modules such as heating, temperature control, heat conduction, and reset. The modules are connected through standardized interfaces, supporting combination expansion and parameter fine-tuning. This not only adapts to the rapid changeover needs of small-batch, multi-variety production, but also allows for independent troubleshooting of individual modules, avoiding overall downtime and significantly improving equipment utilization and scenario adaptability.

[0022] 3. The equipment utilizes detachable heating rods on both sides that can operate independently or in parallel, along with a distributed temperature control design using three independent thermocouples. With the central thermocouple as a reference, the temperature difference between the two side thermocouples is compared in real time, and a PID module dynamically adjusts the local heating power. This ensures controllable temperature differences across the seven hot riveting heads, significantly improving the consistency of hot riveting quality. Simultaneously, this temperature control method can quickly identify heating rod malfunctions and provide feedback to the HMI page, facilitating rapid repair, reducing equipment downtime and defective products, and adapting to the precise temperature requirements of different plastic materials. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall hot riveting device of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the heating body and the product of the present invention;

[0025] Figure 3 This is a bottom view of the heat-conducting unit of the present invention.

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0027] Figure 5 This is a partial half-section diagram of the front of the heat-conducting unit of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0029] Figure 7 This is a three-dimensional structural diagram of the heat-conducting unit of the present invention;

[0030] Figure 8 This is a three-dimensional structural diagram of the heat-conducting component of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the heat-conducting plate of the present invention;

[0032] Figure 10 This is a side half-sectional view of the heat-conducting unit of the present invention.

[0033] In the picture:

[0034] 1. Upper fixture; 11. Lower fixture; 12. Heating body; 13. Hot riveting head; 14. Product; 15. Heating rod; 16. Thermocouple; 2. Heat-conducting assembly; 21. Heat-conducting plate; 22. Heat-conducting ring; 23. Connecting plate; 24. Rotating shaft; 3. Reset assembly; 31. Reset groove; 32. Reset spring; 33. Reset plate; 34. Connecting seat; 4. Flip assembly; 41. Flip bar; 42. Through hole; 43. Flip column; 5. Inclined groove; 6. Expansion groove. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Example 1, referring to Figures 1-10This invention provides a modular hot riveting device with a split-type hot riveting head, comprising an upper fixture 1 and a lower fixture 11, a heating body 12 disposed at the bottom of the upper fixture 1, a plurality of hot riveting heads 13 linearly arrayed at the bottom of the heating body 12, a product 14 disposed at the top of the lower fixture 11, and two detachable sets of heating rods 15 (with PID heating control modules) respectively disposed on both sides of the heating body 12, the two on each side being independent or connected in parallel, three sets of thermocouples 16 (each independently controlled) disposed at the bottom of one side of the heating body 12, and the hot riveting heads 13 being disposed on... The product 14 consists of several plastic protrusions and a metal sheet embedded in the plastic protrusions. The heat-conducting unit includes a reset assembly 3 disposed around the hot riveting head 13 and a heat-conducting assembly 2 disposed at the bottom of the reset assembly 3. The heat-conducting assembly 2 includes two heat-conducting plates 21 disposed on both sides of the hot riveting head 13 for preheating the metal sheet, and a heat-conducting ring 22 fixedly connected to the middle of the two heat-conducting plates 21. The heat-conducting ring 22 is in close contact with the side wall of the hot riveting head 13. The reset assembly 3 is used for resetting the heat-conducting assembly 2. The two heat-conducting plates 21 are inclined arc-shaped at their close ends and horizontal at their far ends. The heat-conducting plates 21 are semi-circular. Among them, the hot riveting head 13 is a core execution unit independent of the heating body 12, the heat conduction component 2, and the reset component 3. It can be disassembled and installed separately for easy subsequent maintenance and replacement. The heating body 12 is responsible for providing a stable heat source. The hot riveting head 13 receives heat through the heat conduction ring 22. The hot riveting head 13 is flexibly connected to the reset component 3 through the connecting seat 34 and the connecting plate 23, realizing the separate design of the heat source and the execution end.

[0037] Specifically, the central thermocouple 16 is the key control point. The left and right thermocouples 16 correspond to their respective heating rods 15, and the temperatures detected by the left and right thermocouples 16 are compared with those of the central thermocouple 16. After setting the temperature parameters, the central thermocouple 16 compares with the set temperature. Simultaneously, the left and right thermocouples 16 compare with the central thermocouple 16. When the temperature detected by the central thermocouple 16 is lower than the set parameter, and the left and right thermocouples 16 are also lower, the controller with the PID module will control the heating of the left and right heating rods 15 separately. When uneven heating occurs, the program will control the local heating power through analog signals in the PID module. This method ensures that the temperatures of the seven hot-riveting heads 13 are almost identical (temperature difference is controllable), thus achieving consistency in the hot-riveting quality and the final product 14. To control the heating temperature with precision, the PID module controls the heating power based on the magnitude of the analog signal; the heating power decreases as the temperature approaches the target temperature. Individual temperature control allows for rapid identification of the heating element 15's status. If one heating element 15 malfunctions, this will be reflected in the module and fed back to the software, ultimately appearing on the HMI page. This enables rapid repair and reduces equipment damage and defective products.

[0038] When the temperature of the hot riveting head 13 reaches the set value, the heating body 12 moves the hot riveting head 13 downward. During the downward movement, since the bottom of the heat-conducting plates 21 on both sides is lower than the hot riveting head 13, the heat-conducting plates 21 first contact the metal sheet. The heat-conducting plates 21 conduct heat from the hot riveting head 13 through the heat-conducting rings 22. The horizontal bottom of the heat-conducting plates 21 presses against the metal sheet, so that the heat-conducting plates 21 preheat the metal sheet in the product 14. As the hot riveting head 13 continues to move downward, the two heat-conducting plates 21 are pressed and reset. In component 3, during the hot riveting process of the hot riveting head 13, the heat-conducting plates 21 on both sides are first squeezed and deflected by the side wall of the hot riveting head 13. Finally, under the action of the flipping component 4, the heat-conducting plates 21 on both sides are flipped and separated from the metal sheet, so that the hot riveting head 13 can perform hot riveting on the plastic protrusion. After the hot riveting is completed, during the upward movement of the hot riveting head 13, the two heat-conducting plates 21 are reset, squeezed and pushed the product 14 to avoid the plastic protrusion from being pulled or stuck, and the hot riveting head 13 is surrounded again.

[0039] In this process, the metal sheet and the plastic protrusion are heated synchronously, which strengthens the bonding strength. The heat-conducting plate 21 first contacts the metal sheet and conducts the heat of the heat-conducting head 13 through the heat-conducting ring 22 to preheat the metal sheet. This avoids the temperature difference contradiction of "plastic melting and metal sheet at room temperature" in traditional hot riveting. The temperature difference between the interface of the molten plastic and the preheated metal sheet is reduced. When the plastic cools and solidifies, it forms a dual connection with the metal sheet, which is both metallurgical-grade and mechanically engaged. This increases the axial tensile and shear forces and solves the core problem of axial loosening and falling off of the metal sheet. The thermal stress caused by the temperature difference is greatly reduced. When the plastic protrusion shrinks, it will not excessively pull the metal sheet, controlling the deformation of the metal sheet and ensuring that the function of the product 14 is not affected (such as the installation accuracy of the metal sheet, conductivity or assembly performance). The heat-conducting plate 21 is semi-circular and surrounds the hot riveting head 13. The bottom horizontal section abuts against the metal sheet. During preheating, the metal sheet is subjected to uniform force and the heat is evenly distributed, avoiding local overheating or insufficient preheating. The metal sheet area corresponding to each riveting point can be preheated synchronously, and there will be no quality difference of "some riveting points are firmly joined and some are loose".

[0040] In addition, the flipping component 4 helps the heat-conducting plate 21 to completely detach from the metal sheet. During hot riveting, the heat-conducting plate 21 will not remain in the hot riveting area, avoiding overflow and adhesion caused by the heat-conducting plate 21 contacting the molten plastic. After hot riveting, the plastic protrusion is in a semi-cooled state (still sticky). The active push when the heat-conducting plate 21 is reset can quickly cut off the sticky connection between the plastic and the hot riveting head 13, avoiding the appearance of filamentous residue (stringing) during separation. The pushing action makes the product 14 separate from the hot riveting head 13 and the heat-conducting plate 21, preventing the molten plastic from sticking to the hot riveting head 13, causing the product 14 to be lifted and the riveting point to be deformed, thus reducing the appearance defect rate.

[0041] Reference Figures 4-8 The two heat-conducting plates 21 are bonded together to form a complete cylindrical shape that surrounds the heat-conducting riveting head 13.

[0042] Specifically, after the hot riveting head 13 moves upward, the heat-conducting plate 21 surrounds the hot riveting head 13 again, which can reduce the heat loss of the hot riveting head 13 and form a local heat preservation space. The next time hot riveting is performed, it is not necessary to reheat to the set temperature (only a small amount of heat loss needs to be compensated), shortening the preheating time and improving the production cycle. It also prevents the forming surface of the hot riveting head 13 from being exposed to the outside and contaminated by dust and impurities, or scratched by collisions, thus extending the service life of the hot riveting head 13.

[0043] Reference Figure 9 The middle part of the heat-conducting ring 22 is vertically aligned with the side wall of the heat-conducting head 13.

[0044] Specifically, the vertical section in the middle of the heat-conducting ring 22 is fully attached to the side wall of the hot riveting head 13, increasing the contact area with the hot riveting head 13. After the hot riveting head 13 reaches the set temperature, the vertically attached heat-conducting ring 22 can quickly and synchronously heat up to a temperature close to that of the hot riveting head 13, ensuring that the heat-conducting plate 21 can provide effective preheating when it contacts the metal sheet. This avoids insufficient preheating caused by a large temperature difference between the heat-conducting ring 22 and the hot riveting head 13 (such as the metal sheet being too cold and not bonding firmly with the molten plastic), or excessively long preheating time (affecting the production cycle).

[0045] Example 2, refer to Figures 5-7 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the reset assembly 3 includes a reset groove 31 opened on the periphery of the hot riveting head 13, a reset spring 32 fixedly connected in the reset groove 31, a reset plate 33 fixedly connected to the bottom of the reset spring 32, and connecting seats 34 fixedly connected to both sides of the bottom of the reset plate 33.

[0046] Specifically, during the preheating stage, the return spring 32 provides pre-tightening force to keep the heat-conducting plate 21 close to the metal sheet, ensuring the preheating effect. During the heat-conducting plate 21 avoidance stage, the hot riveting head 13 moves down to squeeze the heat-conducting plate 21, and the return spring 32 is compressed through the connecting seat 34 and the return plate 33 to achieve smooth avoidance without impact. During the reset and unloading stage, the hot riveting head 13 moves up, the return spring 32 rebounds, driving the heat-conducting plate 21 to reset and pushing the product 14 to unload, while surrounding the hot riveting head 13 for heat preservation. No additional intervention is required throughout the process. The action is triggered only by the lifting force of the hot riveting head 13 itself, forming a closed loop. This ensures the accuracy of the action and simplifies the equipment structure, adapting to the core needs of multi-point hot riveting of small injection molded parts.

[0047] Reference Figures 7-8 The heat-conducting component 2 also includes a connecting plate 23 rotatably connected to the bottom of the connecting seat 34. The connecting plate 23 and the connecting seat 34 are rotatably connected by a rotating shaft 24, and a torsion spring (not shown in the figure) is provided between the connecting seat 34 and the rotating shaft 24. The rotating shaft 24 is fixedly connected to the connecting plate 23, and the bottom of the connecting plate 23 is fixedly connected to the middle of the heat-conducting plate 21.

[0048] Specifically, when not hot-riveted, the heat-conducting plate 21 is tightly attached to the hot riveting head 13 under the action of the torsion spring, and the heat is stably conducted through the heat-conducting ring 22 to precisely preheat the metal sheet (to a temperature suitable for the melting of plastic); when the hot riveting head 13 descends, the squeezing groove 5 causes the heat-conducting plate 21 to first deflect slightly to both sides, and the horizontal bottom detaches from the metal sheet, leaving only the inclined arc-shaped part lightly attached, cutting off the main heat conduction path and reducing the flipping resistance of the subsequent flipping component 4, and then completely detaches through the flipping component 4, completely stopping heat conduction. This avoids the metal sheet temperature from becoming too high due to continuous contact and heat conduction, controls the amount of metal sheet deformation, and prevents the high-temperature metal sheet from conducting heat in the opposite direction, causing the bottom plastic protrusion to melt excessively (overflow, stringing, irregular riveting point formation). Preheating occurs only in the initial stage of the downward movement of the hot riveting head 13 (before it comes into contact with the plastic), creating the optimal temperature environment for "plastic melting and metal sheet bonding"; during the hot riveting stage, the heat-conducting plate 21 is completely detached, avoiding heat interference with the precise process of plastic melting and solidification, ensuring that the degree of melting of each riveting point is consistent, and solving the problem of some riveting points being firmly bonded while others are loose in multi-point hot riveting. The rest of the structure is the same as that in Example 1.

[0049] Example 3, referring to Figures 6-9 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: a flipping assembly 4 is also provided on both sides of the heat-conducting plate 21. The flipping assembly 4 includes a flipping strip 41 fixedly connected to both sides of the two heat-conducting plates 21, a through hole 42 opened on the side of the reset plate 33, and a flipping column 43 fixedly connected to both sides of the reset groove 31. The intersection of the two flipping strips 41, the through hole 42, and the flipping column 43 are on the same vertical line.

[0050] Specifically, when the hot riveting head 13 moves down for hot riveting, the hot riveting head 13 has already squeezed the two heat-conducting plates 21 to deflect slightly. The two flipping pillars 43 begin to squeeze the two flipping strips 41, causing the two heat-conducting plates 21 to continue to rotate away from the metal sheet, thereby achieving the purpose of terminating preheating. This ensures that only the hot riveting head 13 acts on the plastic protrusion during the hot riveting stage, with concentrated and precise heat, improving the regularity of the riveting point (such as no missing material or burrs on the mushroom head). When multiple points are densely hot riveted on small injection molded parts, the heat from adjacent hot riveting heads 13 is prone to crosstalk. After the flipping component 4 completely separates the heat-conducting plates 21, it will not become a heat conduction medium (avoiding the heat of riveting point A to be conducted to the metal sheet of riveting point B). The preheating and hot riveting process of each riveting point is independently controllable, ensuring the bonding strength and appearance consistency of all riveting points.

[0051] Reference Figure 8 The two flip bars 41 are arc-shaped and face each other, and are arranged in a staggered manner without interfering with each other.

[0052] Specifically, when the flipping column 43 presses the flipping strip 41, the two flipping strips 41 can quickly drive the heat-conducting plate 21 to flip and detach from the metal sheet, avoiding overheating and affecting the hot riveting of the hot riveting head 13.

[0053] Reference Figures 7-10 The bottom of the heat-conducting plate 21 is extended and thickened inward, and a sloping groove 5 is provided along its inner wall.

[0054] Specifically, the plastic protrusion of product 14 can penetrate into the gap between the two heat-conducting plates 21, and the diameter of the plastic protrusion after hot riveting is smaller than the gap between them. That is, after the two heat-conducting plates 21 are reset, they will not touch or scratch the plastic protrusion after hot riveting. The extended and thickened setting facilitates rapid preheating of the metal sheet and also provides protection, preventing the hot riveting head 13 from getting dusty at high temperatures. The setting of the inclined groove 5 allows the hot riveting head 13 to squeeze and slightly deflect the two heat-conducting plates 21 during the descent process, reducing resistance for subsequent continuous flipping and detachment from the metal sheet, and preventing the flipping column 43 from directly and hard squeezing and causing wear and scratches on the metal sheet, heat-conducting plate 21 and other parts.

[0055] Reference Figure 4 and Figure 9 The bottom of the reset groove 31 is also provided with an expansion groove 6, and the connecting plate 23 is set in an arc shape.

[0056] Specifically, the design of the expansion groove 6 and the arc-shaped connecting plate 23 is to facilitate the deflection of the heat-conducting plate 21.

[0057] It should be noted that the return spring 32 and the torsion spring can be made of alloy spring material and require stress-relieving annealing heat treatment to prevent deformation at high temperatures; the surface can be passivated to prevent thermal oxidation and corrosion, thus extending service life. The heat-conducting plate 21, heat-conducting ring 22, and hot riveting head 13 can all be made of wear-resistant alloy material with high temperature resistance and good thermal conductivity to improve their high temperature resistance and wear resistance, thereby extending their service life. The remaining structures are the same as those in Example 2.

[0058] Based on embodiments 1-3, the working principle of this invention is as follows: The device uses the heating body 12 as its core, with detachable heating rods 15 on both sides and three sets of independent thermocouples 16. The middle thermocouple 16 serves as the reference control point, and the temperature difference between the two thermocouples 16 and the central thermocouple is compared in real time. The PID module dynamically adjusts the local heating power through analog signals to ensure that the temperature difference of the seven hot riveting heads 13 is controllable and to ensure the consistency of hot riveting. At the same time, it can quickly identify heating rod 15 faults and feed them back to the HMI page for easy maintenance. After the hot riveting head 13 reaches the set temperature, the heating body 12 moves it downwards. The heat-conducting plate 21, being lower at the bottom, contacts the metal sheet first. Heat is efficiently conducted through the vertical heat-conducting ring 22 that is close to the side wall of the hot riveting head 13, achieving preheating of the metal sheet (avoiding weak connection and deformation caused by temperature difference). As the hot riveting head 13 continues to move downwards, its side wall squeezes the inclined groove 5 of the heat-conducting plate 21, and with the help of the torsion spring buffer, a small deflection is achieved, cutting off the main heat conduction path. Then, the flipping component 4 takes over and drives the heat-conducting plate 21 to completely detach, avoiding thermal interference. After the hot riveting head 13 completes the hot riveting of the plastic protrusion, it moves upward. The return spring 32 drives the return plate 33 and the connecting plate 23 to return to their original positions. The heat-conducting plate 21 pushes the product 14 out of the material (preventing stringing and sticking) and re-surrounds the hot riveting head 13 to form a heat-insulating space, shortening the next preheating time. The entire process is achieved through the mechanical linkage of the return component 3, the heat-conducting component 2, and the flipping component 4, without the need for additional drive, realizing a closed loop of "preheating-avoidance-hot riveting-returning-heat insulation", taking into account the connection strength, the precision of the product 14, and the production efficiency.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A modular hot riveting device with split hot riveting heads, comprising an upper fixture (1) and a lower fixture (11), a heating body (12) disposed at the bottom of the upper fixture (1), a plurality of hot riveting heads (13) linearly arrayed at the bottom of the heating body (12), and a product (14) disposed at the top of the lower fixture (11), characterized in that: It also includes two sets of detachable heating rods (15) respectively set on both sides of the heating body (12), three sets of thermocouples (16) set on the bottom of one side of the heating body (12), and a heat-conducting unit set on the heat riveting head (13); The product (14) consists of several plastic protrusions and a metal sheet embedded in the plastic protrusions. The heat-conducting unit includes a reset assembly (3) disposed around the heat riveting head (13) and a heat-conducting assembly (2) disposed at the bottom of the reset assembly (3). The heat-conducting component (2) includes two heat-conducting plates (21) disposed on both sides of the heat-conducting head (13) for preheating the metal sheet, and a heat-conducting ring (22) disposed in the middle of the two heat-conducting plates (21), with the heat-conducting ring (22) closely attached to the side wall of the heat-conducting head (13); The reset component (3) is used to reset the heat conduction component (2). The two heat conduction plates (21) are inclined arc at their close ends and horizontal at their far ends. The heat conduction plates (21) are semi-circular. The reset assembly (3) includes a reset groove (31) opened on the periphery of the hot riveting head (13), a reset spring (32) disposed in the reset groove (31), a reset plate (33) disposed at the bottom of the reset spring (32), and connecting seats (34) disposed on both sides of the bottom of the reset plate (33). The heat-conducting component (2) further includes a connecting plate (23) disposed at the bottom of the connecting seat (34). The connecting plate (23) and the connecting seat (34) are rotatably connected by a rotating shaft (24). A torsion spring is disposed between the connecting seat (34) and the rotating shaft (24). The rotating shaft (24) is fixedly connected to the connecting plate (23). The bottom of the connecting plate (23) is fixedly connected to the middle of the heat-conducting plate (21). The two heat-conducting plates (21) are bonded together to form a complete cylindrical shape that surrounds the heat-conducting head (13).

2. The modular hot riveting equipment with a split hot riveting head according to claim 1, characterized in that: The middle part of the heat-conducting ring (22) is vertically aligned with the side wall of the heat-conducting head (13).

3. The modular hot riveting equipment with a split hot riveting head according to claim 1, characterized in that: The heat-conducting plate (21) is also provided with a flipping assembly (4) on both sides. The flipping assembly (4) includes a flipping strip (41) on both sides of the two heat-conducting plates (21), a through hole (42) on the side of the reset plate (33), and a flipping column (43) on both sides of the reset groove (31). The intersection of the two flipping strips (41), the through hole (42), and the flipping column (43) are on the same vertical line.

4. The modular hot riveting equipment with a split hot riveting head according to claim 3, characterized in that: The two flip bars (41) are arc-shaped and face each other, and are arranged in a staggered manner without interfering with each other.

5. The modular hot riveting equipment with a split hot riveting head according to claim 4, characterized in that: The bottom of the heat-conducting plate (21) is extended and thickened inward, and a sloping groove (5) is provided along its inner wall.

6. The modular hot riveting equipment with a split hot riveting head according to claim 5, characterized in that: The bottom of the reset groove (31) is also provided with an expansion groove (6), and the connecting plate (23) is arranged in an arc shape.

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