A pressure head structure and its hot pressing device

Abstract

This utility model discloses a pressure head structure and its hot pressing device, including a heating pressure head and an excitation coil disposed on the outer peripheral surface of the heating pressure head. A hot pressing plate is detachably mounted on the end face of the heating pressure head near the workpiece. The excitation coil generates an alternating magnetic field when energized, causing the heating pressure head and the hot pressing plate to heat up, thereby performing hot pressing treatment on the workpiece. This utility model has a simple structure. Through the coordinated operation of the excitation coil and the heating pressure head, based on the principle of electromagnetic induction, the heating pressure head itself acts as a heat source to directly generate heat, achieving rapid heating in seconds and power adjustment in milliseconds. This significantly improves efficiency compared to traditional solutions. Combined with a buffer mechanism, it effectively avoids the formation of bubbles or warping at the bonding interface, improving product yield.

Description

Technical Field

[0001] This utility model relates to the field of precision manufacturing technology, specifically a pressure head structure and its hot pressing device. Background Technology

[0002] In the field of precision manufacturing, hot pressing is a key process for reliably bonding materials such as films and gaskets with hot melt adhesive. Its process stability and control precision directly determine the bonding quality and consistency of the final product. Currently, the industry commonly uses a hot pressing solution based on resistance heating, which involves embedding an electric heating tube inside a metal indenter to heat the working surface of the indenter through heat conduction. However, this solution relies on the heat conduction path, and the heating process from the heating tube reaching the target temperature on the working surface of the indenter requires a long heating period. This not only prolongs the cycle time but also makes it difficult to meet the requirements of rapid production changeover. Therefore, a new indenter structure and its hot pressing device are proposed. Utility Model Content

[0003] The purpose of this invention is to provide a pressure head structure and its hot pressing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure head structure, including a heating pressure head and an excitation coil disposed on the outer peripheral surface of the heating pressure head. A hot pressing plate is detachably mounted on the end face of the heating pressure head near the workpiece. When the excitation coil is energized, it generates an alternating magnetic field, causing the heating pressure head and the hot pressing plate to heat up and perform hot pressing treatment on the workpiece.

[0005] As a further embodiment of this utility model: the end face of the heating pressure head near the workpiece is provided with a groove for inserting a heating pressure plate, a pin hole is provided in the groove, a pin for fixing the heating pressure plate and the heating pressure head is inserted into the pin hole, and a pin is inserted into the end of the pin.

[0006] A hot pressing device includes the aforementioned pressure head structure, and further includes a frame and a drive mechanism disposed on the frame, wherein a buffer mechanism driven thereon is mounted on the drive mechanism, and the pressure head structure is mounted on the buffer mechanism.

[0007] As a further embodiment of this utility model: the driving mechanism includes a servo electric cylinder mounted on the frame, the telescopic end of the servo electric cylinder passing through the frame and mounted with a connecting plate, and a linear bearing connected to the frame mounted on the connecting plate.

[0008] As a further embodiment of this utility model: the buffer mechanism includes a mounting base plate connected to the drive mechanism, the mounting base plate is connected to the heating pressure head through a plurality of elastic components, a force sensing unit for real-time detection of the pressing load is provided between the mounting base plate and the heating pressure head, and a pressure adjustment component for adjusting the initial pressure of the elastic components and the buffer stroke is installed on the mounting base plate.

[0009] As a further embodiment of this utility model: the pressure adjustment component includes a screw connected to the heating head, the end of the screw extending to the top of the mounting base plate, and the outer circumferential surface of the end plate being threaded with a threaded sleeve that maintains contact with the mounting base plate.

[0010] As a further embodiment of this utility model: a protective cover is installed on the mounting base plate, and the excitation coil is connected to the protective cover.

[0011] As a further embodiment of this utility model, it also includes a controller, which is signal-connected to a temperature sensing unit installed on the heating head. The temperature sensing unit is used to monitor the temperature of the heating head and the hot plate in real time. The controller is also signal-connected to a force sensing unit, a high-frequency induction power supply and a drive mechanism, respectively. The high-frequency induction power supply provides current to the excitation coil.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This application utilizes the synergistic interaction between the excitation coil and the heating head, based on the principle of electromagnetic induction, to enable the heating head itself to act as a heat source and generate heat directly. This achieves rapid heating in seconds and power adjustment in milliseconds, significantly improving efficiency compared to traditional solutions. Furthermore, the combination of a buffer mechanism effectively prevents bubbles or warping at the bonding interface, thereby increasing product yield. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the combination of the pressure head structure and the buffer mechanism of this utility model; Figure 2 This is a schematic diagram of the mounting base plate of this utility model; Figure 3 This is a schematic diagram of the frame of this utility model; Figure 4 This is a schematic diagram of the drive mechanism of this utility model; Figure 5 This is a schematic diagram of the protective cover of this utility model; In the diagram: 1. Heating head; 101. Groove; 102. Pin hole; 103. Pin; 104. Insert pin; 2. Excitation coil; 3. Hot press plate; 4. Frame; 5. Drive mechanism; 51. Servo electric cylinder; 52. Connecting plate; 53. Linear bearing; 6. Buffer mechanism; 61. Mounting base plate; 62. Elastic component; 63. Force sensing unit; 64. Pressure adjustment component; 641. Screw; 642. Threaded sleeve; 7. Protective cover; 8. Temperature sensing unit. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-5 In this embodiment of the present invention, a pressure head structure includes a heating pressure head 1 and an excitation coil 2 disposed on the outer peripheral surface of the heating pressure head 1. A hot pressing plate 3 is detachably mounted on the end face of the heating pressure head 1 near the workpiece. When the excitation coil 2 is energized, it generates an alternating magnetic field, causing the heating pressure head 1 and the hot pressing plate 3 to heat up and perform hot pressing treatment on the workpiece.

[0016] Specifically, the heating head 1 and the hot plate 3 are both made of copper-based alloys with high thermal conductivity and moderate resistivity, specifically beryllium copper alloy, tungsten copper alloy or chromium zirconium copper alloy. Excitation coils 2 are distributed in a ring on their outer circumference. The heating head 1 heats up under the action of the alternating magnetic field generated by the excitation coil 2. The excitation coil 2 is driven by a high-frequency induction power supply. When the excitation coil 2 generates an alternating magnetic field, the heating head 1 itself acts as a heat source to directly heat up, ensuring that the heating head 1 and the hot plate 3 can quickly heat up to the set temperature.

[0017] Through the above scheme, based on the principle of electromagnetic induction, the heating head 1 itself is used as a heat source to directly generate heat, achieving rapid heating in seconds and power adjustment in milliseconds. The efficiency is greatly improved compared with the traditional scheme, and the energy consumption is reduced by about 40%. At the same time, the heating head 1 uses materials with high thermal conductivity and moderate resistivity and optimizes the magnetic field distribution through the excitation coil 2 to ensure that the temperature field uniformity deviation of the working surface is ≤±2℃.

[0018] Please see Figure 3 and Figure 4In one embodiment, preferably, the end face of the heating head 1 near the workpiece is provided with a slot 101 for inserting the heating pressure plate 3. A pin hole 102 is provided in the slot 101. A pin 103 for fixing the heating pressure plate 3 and the heating head 1 is inserted into the pin hole 102. A pin 104 is inserted into the end of the pin 103.

[0019] Specifically, the interior of the slot 101 is adapted to the hot press plate 3. The hot press plate 3 has a through hole that is coaxial with the pin hole 102 after the hot press plate 3 is inserted into the slot 101. One end of the pin 103 passes through the pin hole 102 and the through hole to initially position and fix the hot press plate 3 in the slot 101. Then, the end of the pin 104 is inserted into the insertion hole at the end of the pin 103 to fix the position of the pin 103 and ensure that the hot press plate 3 is tightly connected to the heating head 1. In addition, the hot press plate 3 can be quickly disassembled and assembled by pulling out the pin 104 and the pin 103 in sequence, which can shorten the product changeover time from hours to minutes, perfectly meeting the flexible manufacturing requirements of Industry 4.0.

[0020] A hot pressing device includes a pressure head structure, and further includes a frame 4 and a drive mechanism 5 disposed on the frame 4. A buffer mechanism 6 driven by the drive mechanism 5 is mounted on the drive mechanism 5, and the pressure head structure is mounted on the buffer mechanism 6.

[0021] Specifically, the frame 4 includes a support plate and support columns set at the four corners of the support plate. The drive mechanism 5 is installed on the top of the support plate. The end of the drive mechanism 5 is equipped with a buffer mechanism 6 located at the bottom of the support plate. The buffer mechanism 6 is connected to the pressure head structure. The drive mechanism 5 drives the buffer mechanism 6 to move synchronously with the pressure head structure to achieve hot pressing of the workpiece.

[0022] Please see Figure 2 In one embodiment, preferably, the drive mechanism 5 includes a servo cylinder 51 mounted on the frame 4. The telescopic end of the servo cylinder 51 passes through the frame 4 and is mounted on a connecting plate 52. A linear bearing 53 connected to the frame 4 is mounted on the connecting plate 52. Furthermore, the servo cylinder 51 serves as a power source and can drive the connecting plate 52 to move vertically. The number of linear bearings 53 is not limited. In this embodiment, preferably, there are two linear bearings 53. The two linear bearings 53 are symmetrically arranged on both sides of the servo cylinder 51 and can withstand radial overturning force to ensure the stability of the connecting plate 52 during movement.

[0023] Please see Figure 3In one embodiment, preferably, the buffer mechanism 6 includes a mounting base plate 61 connected to the drive mechanism 5. The mounting base plate 61 is connected to the heating head 1 through a plurality of elastic components 62. A force sensing unit 63 for real-time detection of the pressing load is provided between the mounting base plate 61 and the heating head 1. A pressure adjustment component 64 for adjusting the initial pressure and buffer stroke of the elastic components 62 is installed on the mounting base plate 61.

[0024] Specifically, the mounting base plate 61 is fixedly connected to the connecting plate 52, and the elastic component 62 is a spring. One end of the spring is connected to the force sensing unit 63, and the other end is connected to the heating head 1. A buffer zone is established between the mounting base plate 61 and the heating head 1. The spring feeds back the pressure of the heating head 1 to the force sensing unit 63 in real time. At the same time, the real-time feedback from the force sensing unit 63 enables the controller to fine-tune the position or force output command of the drive mechanism 5 so as to control the pressure fluctuation range within ±2% of the target value.

[0025] Please see Figure 4 In one embodiment, preferably, the pressure adjustment component 64 includes a screw 641 connected to the heating head 1. The end of the screw 641 extends to the top of the mounting base plate 61, and the outer peripheral surface of the end is threaded with a threaded sleeve 642 that keeps in contact with the mounting base plate 61. Furthermore, the screw 641 and the mounting base plate 61 are movably connected. By rotating the position of the threaded sleeve 642 on the screw 641, the initial pressure and buffer stroke of the elastic component 62 can be adjusted.

[0026] Please see Figure 5 In one embodiment, preferably, a protective cover 7 is installed on the mounting base plate 61, and the excitation coil 2 is connected to the protective cover 7 to provide heat insulation and prevent the operator from touching the internally heated excitation coil 2 and heating pressure head 1.

[0027] Please see Figure 5 In one embodiment, preferably, the system further includes a controller. The controller is signal-connected to a temperature sensing unit 8 mounted on the heating head 1. The temperature sensing unit 8 is used to monitor the temperature of the heating head 1 and the hot plate 3 in real time. The controller is also signal-connected to a force sensing unit 63, a high-frequency induction power supply, and a drive mechanism 5. The high-frequency induction power supply provides current to the excitation coil 2. Further, the high-frequency induction power supply and the controller are not shown in the figure. The controller receives the data fed back from the temperature sensing unit 8 and the force sensing unit 63 in real time, and controls the operation of the high-frequency induction power supply and the drive mechanism 5 accordingly, thereby realizing dual closed-loop control.

[0028] The working principle and usage process of this utility model are as follows: During the heating process, based on the feedback from the temperature sensing unit 8, the controller dynamically adjusts the power output of the high-frequency induction power supply to make the temperature of the heating head 1 and the hot plate 3 approach and stabilize at the target temperature; then, the servo cylinder 51 drives the heating head 1 and the hot plate 3 to move towards the workpiece, and based on the feedback from the force sensing unit 63, the controller regulates the servo cylinder 51. When the detected pressure reaches the target pressure, the elastic component 62 is triggered to work and enter the pressure holding stage; after the pressure holding time reaches the set value, the controller controls the servo cylinder 51 to reset and terminate the heating.

[0029] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0030] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A pressure head structure, characterized in that, It includes a heating head and an excitation coil disposed on the outer periphery of the heating head. A hot pressing plate is detachably mounted on the end face of the heating head near the workpiece. When the excitation coil is energized, it generates an alternating magnetic field, which heats the heating head and the hot pressing plate, and performs hot pressing treatment on the workpiece.

2. The indenter structure of claim 1, wherein The heating head has a slot on the end face near the workpiece for inserting a heating plate. A pin hole is provided in the slot, and a pin for fixing the heating plate and the heating head is inserted into the pin hole. A pin is inserted into the end of the pin.

3. A hot press apparatus characterized by comprising: The device includes the pressure head structure as described in any one of claims 1-2, and further includes a frame and a drive mechanism disposed on the frame, wherein a buffer mechanism driven thereon is mounted on the drive mechanism, and the pressure head structure is mounted on the buffer mechanism.

4. The hot press apparatus according to claim 3, wherein The drive mechanism includes a servo electric cylinder mounted on a frame. The telescopic end of the servo electric cylinder passes through the frame and is mounted on a connecting plate. A linear bearing connected to the frame is mounted on the connecting plate.

5. The hot press apparatus according to claim 3, wherein The buffer mechanism includes a mounting base plate connected to the drive mechanism. The mounting base plate is connected to the heating head through several elastic components. A force sensing unit for real-time detection of the pressing load is provided between the mounting base plate and the heating head. A pressure adjustment component for adjusting the initial pressure of the elastic components and the buffer stroke is installed on the mounting base plate.

6. The hot press apparatus of claim 5, wherein The pressure adjustment component includes a screw connected to a heating head, with one end of the screw extending to the top of the mounting base plate. The outer circumferential surface of the screw end is threaded with a threaded sleeve that maintains contact with the mounting base plate.

7. The hot pressing device according to claim 5, characterized in that, A protective cover is mounted on the mounting base plate, and the excitation coil is connected to the protective cover.

8. The hot pressing device according to claim 5, characterized in that, It also includes a controller, which is connected to a temperature sensing unit installed on the heating head. The temperature sensing unit is used to monitor the temperature of the heating head and the hot plate in real time. The controller is also connected to a force sensing unit, a high-frequency induction power supply and a drive mechanism. The high-frequency induction power supply provides current to the excitation coil.

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