Automatic thermocompression bonding device for heat insulation pad of automobile steering wheel

Abstract

The invention relates to the technical field of thermocompression bonding devices, and discloses an automatic thermocompression bonding device for a heat insulation pad of an automobile steering wheel, which comprises a device main body, and the device main body comprises a workbench and a connecting bracket mounted on the workbench; and the cooling unit is arranged along the circumference of the placement through opening, and after hot pressing machining is completed, the pressing head assembly releases cooling gas to cool the machined part, and the machined part penetrates through the cooling unit and is cooled in the circumferential direction of a machined part pressing area through the cooling unit. According to the invention, an ultrasonic hot pressing technology is adopted, and a traditional gluing process is thoroughly cancelled; the machined part is subjected to thermocompression bonding through ultrasonic waves, so that the machined part is quickly and firmly attached to the wear-resistant rubber, the production efficiency is remarkably improved, and the energy consumption is reduced; and after hot pressing is completed, the pressure head assembly releases cooling gas to effectively prevent a machined part from deforming at high temperature, the size precision and appearance quality of a product are guaranteed, and the production period is shortened.

Description

Technical Field

[0001] This invention relates to the field of hot pressing device technology, and more specifically, to an automatic hot pressing device for automotive steering wheel heat insulation pads. Background Technology

[0002] Automotive steering wheel heat insulation pads are an important component inside modern cars. Their main function is to prevent the steering wheel from overheating under prolonged exposure to sunlight, which could affect driver comfort and driving safety. The traditional manufacturing process for automotive steering wheel heat insulation pads typically involves bonding heat insulation material to wear-resistant rubber. Currently, the mainstream bonding method uses an adhesive application process, where adhesive is applied to the contact surfaces of the heat insulation material and the wear-resistant rubber, followed by pressing, drying, and other steps to allow it to cure and bond.

[0003] However, the glue application process usually requires manual operation or semi-automated equipment, resulting in low production efficiency and making it difficult to meet the automotive industry's demand for large-scale, high-efficiency production. Furthermore, the uniformity of glue application is difficult to control precisely; too much or too little glue may lead to weak adhesion or glue overflow, affecting the product's appearance and quality.

[0004] Secondly, the curing of adhesives requires a certain amount of time and temperature, increasing the production cycle and energy consumption, especially the drying process which consumes a large amount of electrical or thermal energy. Furthermore, the adhesive itself may contain volatile organic compounds, which may release harmful gases during production and use, potentially impacting the health of operators and the environment, and also failing to meet the environmental protection requirements of the automotive industry. Summary of the Invention

[0005] This invention provides an automatic heat-pressing device for automotive steering wheel heat insulation pads, solving the technical problems of low efficiency, high cost, poor environmental performance, and unstable bonding quality in related technologies.

[0006] This invention provides an automatic heat-pressing device for automotive steering wheel heat insulation pads, comprising a device body, the device body including a worktable and a connecting bracket mounted on the worktable; heat-pressing units are symmetrically arranged on the connecting bracket, and the telescopic ends of the heat-pressing units are provided with pressure head assemblies; placement openings are symmetrically opened on the worktable, and the placement openings correspond one-to-one with the positions of the pressure head assemblies. The workpiece is placed inside the placement opening; when the workpiece is hot-pressed, the hot-pressing unit drives the pressure head assembly to move downward, so that the pressure head assembly contacts the workpiece and performs hot-pressing on the workpiece. A masking unit is disposed outside the pressure head assembly. When the workpiece is subjected to hot pressing, the masking unit masks the workpiece, so that a closed processing space is formed between the pressure head assembly and the workpiece. A cooling unit is arranged around the circumference of the placement port. After the hot pressing process is completed, the pressure head assembly releases cooling gas to cool the workpiece, which passes through the cooling unit and is cooled along the circumferential direction of the pressing area of ​​the workpiece.

[0007] As a further optimization of the present invention, the hot pressing unit includes a fixed frame mounted on a connecting bracket, a movable frame disposed inside the fixed frame, and an ultrasonic generator disposed inside the movable frame. A first cylinder is mounted on the fixed frame, and the telescopic end of the first cylinder passes through the fixed frame and is fixedly connected to the movable frame. A heat dissipation unit is disposed on the fixed frame and the movable frame.

[0008] As a further optimization of the present invention, the ultrasonic generator includes an ultrasonic generator body and an ultrasonic generator head, the ultrasonic generator head being mounted on the ultrasonic generator body and connected to the pressure head assembly.

[0009] As a further optimization of the present invention, the pressure head assembly includes a pressure plate bearing portion mounted on the head of the ultrasonic generator, a pressure plate contact portion is provided below the pressure plate bearing portion, and multiple sets of guide plates are installed between the pressure plate contact portion and the pressure plate bearing portion.

[0010] As a further optimization of the present invention, the pressure head assembly further includes a flow-diverting assembly disposed between the pressure plate bearing portion and the pressure plate contact portion. The flow-diverting assembly includes a flow-diverting cylinder fixedly connected to the pressure plate bearing portion and the pressure plate contact portion. The flow-diverting cylinder has multiple flow-diverting ports arranged in an annular shape. A cooling pipe is installed on the flow-diverting cylinder, and one end of the cooling pipe extends through the pressure plate bearing portion to the outer surface of the pressure plate bearing portion.

[0011] As a further optimization of the present invention, an airflow channel is formed between every two sets of the guide plates, and each set of the diversion port corresponds one-to-one with each set of the airflow channel.

[0012] As a further optimization of the present invention, the shielding unit includes a connecting cylinder mounted on the pressure plate bearing portion and a cover slidably connected to the connecting cylinder.

[0013] As a further optimization of the present invention, the interior of the placement port is arranged in a stepped structure, the stepped surface of the placement port is used to place the workpiece, and a positioning unit is provided below the placement port.

[0014] As a further optimization of the present invention, the cooling unit includes a cooling cavity that is annularly formed on the stepped surface of the placement opening, and multiple sets of cooling channels formed inside the workbench along the circumferential direction of the placement opening; a contact plate is provided on the cooling cavity, and the contact plate is fixedly connected to the stepped surface of the placement opening.

[0015] As a further optimization of the present invention, the cooling channel is arranged in a U-shape, with one end of the cooling channel connected to the interior of the cooling chamber and the other end of the cooling channel passing through the workbench and connected to the outside of the workbench.

[0016] The beneficial effects of this invention are as follows: 1. This invention uses ultrasonic hot pressing technology, which completely eliminates the traditional glue application process, avoids the use of glue, and fundamentally solves the problems of low efficiency, high cost, environmental pollution and unstable product quality associated with glue application.

[0017] 2. By using ultrasonic waves to heat-press the processed parts, a rapid and firm bonding between the processed parts and the wear-resistant rubber is achieved, which significantly improves production efficiency, reduces energy consumption, and achieves the goal of energy saving and cost reduction.

[0018] 3. After hot pressing is completed, the pressure head assembly releases cooling gas and, in conjunction with the cooling unit, performs rapid and uniform circumferential cooling on the workpiece. This effectively prevents the workpiece from deforming at high temperatures, ensuring the dimensional accuracy and appearance quality of the product, and shortening the production cycle.

[0019] 4. This device has a compact structure, a high degree of automation, and is easy to operate and maintain. It can adapt to the needs of large-scale production and significantly improves the automation level of automotive steering wheel heat insulation pad production and the consistency of product quality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the hot pressing unit, the pressing head assembly, and the shielding unit of the present invention; Figure 5 This is an exploded three-dimensional structural diagram of the pressure head assembly of the present invention; Figure 6 This is a three-dimensional structural diagram of the current splitter component of the present invention; Figure 7 This is a cross-sectional perspective view of the hot pressing unit, the pressing head assembly, and the shielding unit of the present invention. Figure 8 This is the invention Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a partial cross-sectional three-dimensional structural schematic diagram of the worktable of the present invention; Figure 10 This is a three-dimensional structural diagram of the positioning unit of the present invention.

[0021] In the diagram: 100, main body of the device; 110, workbench; 120, connecting bracket; 130, hot pressing unit; 131, fixed frame; 132, movable frame; 133, ultrasonic generator body; 134, ultrasonic generator head; 135, first cylinder; 136, guide post; 137, guide sleeve; 140, pressure head assembly; 141, pressure plate bearing part; 142, pressure plate contact part; 143, guide plate; 144, flow splitting assembly; 1441, flow splitting cylinder; 1442, flow splitting port; 1443 150 Cooling pipe; 200 Placement opening; 300 Machining part; 310 Shielding unit; 320 Connecting cylinder; 330 Shielding cover; 340 Limiting rod; 400 Spring; 410 Cooling unit; 420 Cooling chamber; 430 Cooling channel; 440 Air outlet; 500 Positioning unit; 510 Second cylinder; 520 Positioning plate; 530 Positioning rod; 600 Heat dissipation unit; 610 Air inlet; 620 Air outlet; 630 Cooling fan. Detailed Implementation

[0022] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0023] According to the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the present invention provides an automatic heat-pressing device for automotive steering wheel heat insulation pads, which is mainly used to bond automotive steering wheel heat insulation pads with wear-resistant rubber; wherein, the automotive steering wheel heat insulation pad is the processed part 200.

[0024] Specifically, the automatic hot pressing device includes a main body 100, which includes a worktable 110 and a connecting bracket 120 mounted on the worktable 110. Hot pressing units 130 are symmetrically arranged on the connecting bracket 120, and the telescopic end of the hot pressing unit 130 is provided with a pressure head assembly 140. The symmetrically arranged hot pressing units 130 can simultaneously perform hot pressing on multiple processing areas, thereby improving production efficiency.

[0025] It should be noted that the hot pressing unit 130 has a telescopic function, which can drive the pressing head assembly 140 to move up and down to adapt to workpieces 200 of different heights and to achieve the pressing action.

[0026] The hot pressing unit 130 includes an ultrasonic generator, which uses ultrasonic waves to hot press the workpiece 200 together, so that the workpiece 200 is bonded to the wear-resistant rubber. The ultrasonic hot pressing method completely eliminates the traditional glue application process, avoids the use of glue, thereby improving production efficiency, saving glue costs and subsequent drying energy costs, and achieving the goal of energy saving and cost reduction.

[0027] It is important to understand that ultrasonic hot pressing uses the frictional heat generated by ultrasonic vibration to melt the material locally and instantaneously, and then applies pressure to bond them together to form a strong bond. It has the advantages of being fast, having low pollution, and high strength.

[0028] The worktable 110 has symmetrical placement openings 150, and the placement openings 150 correspond one-to-one with the positions of the pressure head assembly 140. The placement openings 150 are areas for placing the workpiece 200 to be processed. The correspondence between them and the pressure head assembly 140 ensures that the pressure head assembly 140 can accurately align and press the workpiece 200.

[0029] According to the appendix Figure 2 As shown, the workpiece 200 has multiple sets of connecting holes and is placed inside the placement opening 150. The workpiece 200 is a car steering wheel heat insulation pad to be processed, and the connecting holes on it are used for connection with the vehicle body.

[0030] It should be noted that when the workpiece 200 is subjected to hot pressing, the hot pressing unit 130 drives the pressure head assembly 140 to move downward, so that the pressure head assembly 140 comes into contact with the workpiece 200 and performs hot pressing on the workpiece 200. This realizes the transfer of ultrasonic energy from the pressure head assembly 140 to the workpiece 200 and applies the necessary pressure to complete the hot pressing process.

[0031] According to the appendix Figure 3 and attached Figure 4As shown, the shielding unit 300 is disposed outside the pressure head assembly 140. When the workpiece 200 is subjected to hot pressing, the shielding unit 300 shields the workpiece 200, forming a closed processing space between the pressure head assembly 140 and the workpiece 200. The main function of this closed space is to effectively restrict and concentrate the cooling gas in the processing area when the pressure head assembly 140 releases cooling gas after the hot pressing process is completed, thereby improving the cooling efficiency and uniformity of the cooling gas on the workpiece 200.

[0032] According to the appendix Figure 2 and attached Figure 3 As shown, the cooling unit 400 is arranged circumferentially along the placement opening 150. After the hot pressing process is completed, the pressure head assembly 140 releases cooling gas to cool the workpiece 200. The gas passes through the cooling unit 400 and is cooled along the circumferential direction of the pressing area of ​​the workpiece 200. After hot pressing, the workpiece 200 is in a high-temperature state. If it is not cooled in time, it may cause material deformation or internal stress. The cooling gas released by the pressure head assembly 140 works synergistically with the cooling unit 400 to quickly and uniformly cool the pressing area of ​​the workpiece 200, ensuring the dimensional stability and bonding strength of the product.

[0033] In another embodiment, according to the appendix Figure 3 Appendix Figure 4 and attached Figure 7 As shown, the hot pressing unit 130 includes a fixed frame 131 mounted on the connecting bracket 120. The fixed frame 131 has a movable frame 132 inside. The movable frame 132 is a carrier for the ultrasonic generator and other components and can move up and down relative to the fixed frame 131.

[0034] Specifically, an ultrasonic generator is installed inside the movable frame 132. The ultrasonic generator includes an ultrasonic generator body 133 and an ultrasonic generator head 134. The ultrasonic generator head 134 is mounted on the ultrasonic generator body 133. The ultrasonic generator body 133 is the core component for generating ultrasonic vibrations. The ultrasonic generator body 133 is located inside the movable frame 132, while the ultrasonic generator head 134 extends through the movable frame 132 to its outer surface. The ultrasonic generator head 134 is connected to the pressure head assembly 140. The ultrasonic generator head 134 serves as a medium for energy transfer, transmitting ultrasonic vibrations from the ultrasonic generator body 133 to the pressure head assembly 140.

[0035] It should be noted that a first cylinder 135 is installed on the fixed frame 131, and the telescopic end of the first cylinder 135 passes through the fixed frame 131 and is fixedly connected to the movable frame 132; the first cylinder 135 is the power source for driving the movable frame 132 to move up and down, thereby realizing the telescopic function of the pressure head assembly 140 and controlling the pressing action.

[0036] The fixed frame 131 has guide posts 136 symmetrically installed inside, and guide sleeves 137 are slidably connected to the outside of the guide posts 136. The guide sleeves 137 are fixedly connected to the movable frame 132. The guide posts 136 and guide sleeves 137 constitute a guiding mechanism to ensure that the movable frame 132 moves smoothly in a straight line under the drive of the first cylinder 135, preventing swaying and deflection, and ensuring the accuracy of pressing.

[0037] In another embodiment, according to the appendix Figure 4 and attached Figure 5 As shown, the pressure head assembly 140 includes a pressure plate support portion 141 mounted on the ultrasonic generator head 134; the pressure plate support portion 141 is the main body of the pressure head assembly 140, which supports and connects other functional components. A pressure plate contact portion 142 is provided below the pressure plate support portion 141, and multiple sets of guide plates 143 are installed between the pressure plate contact portion 142 and the pressure plate support portion 141. It should be noted that the pressure plate contact portion 142 is the part that directly contacts the workpiece 200, transmitting ultrasonic vibration and pressure to the workpiece 200. The guide plates 143 are provided to guide airflow during cooling.

[0038] Specifically, the centers of the pressure plate bearing portion 141 and the pressure plate contact portion 142 are located on the same axis, which ensures the symmetry of the pressure head assembly 140 and the uniformity of the pressing. The guide plates 143 are arranged in a ring array with the central axis of the pressure plate bearing portion 141 and the pressure plate contact portion 142 as the center. Each group of guide plates 143 is set as an arc. The design of the arc-shaped guide plates 143 helps to optimize the distribution of cooling airflow, so that it acts more evenly on the pressing area of ​​the workpiece 200.

[0039] Preferably, according to the appendix Figure 5 and attached Figure 6 As shown, the pressure head assembly 140 also includes a flow distribution assembly 144 disposed between the pressure plate bearing portion 141 and the pressure plate contact portion 142, which is used to effectively distribute the cooling gas during the cooling process.

[0040] Specifically, the flow distribution assembly 144 includes a flow distribution cylinder 1441 fixedly connected to the pressure plate support portion 141 and the pressure plate contact portion 142. The flow distribution cylinder 1441 forms an internal channel for cooling gas. Multiple flow distribution ports 1442 are formed in a ring shape on the flow distribution cylinder 1441. These flow distribution ports 1442 are the outlets for cooling gas to flow from the flow distribution cylinder 1441 to the workpiece 200. A cooling pipe 1443 is installed on the flow distribution cylinder 1441, and one end of the cooling pipe 1443 extends through the pressure plate support portion 141 to the outer surface of the pressure plate support portion 141. The cooling pipe 1443 is used to introduce externally supplied cooling gas into the interior of the flow distribution assembly 144.

[0041] An airflow channel is formed between every two sets of guide plates 143, and each set of branch outlets 1442 corresponds to each set of airflow channels. This ensures that the cooling gas ejected from the branch outlets 1442 can be uniformly guided by the guide plates 143 to the pressing area of ​​the workpiece 200 through the airflow channels, thereby achieving effective and uniform circumferential cooling of the workpiece 200.

[0042] In another embodiment, according to the appendix Figure 7 and attached Figure 8 As shown, the shielding unit 300 includes a connecting cylinder 310 mounted on the pressure plate support portion 141 and a cover 320 slidably connected to the connecting cylinder 310. The connecting cylinder 310 provides a connection between the shielding unit 300 and the pressure head assembly 140. The cover 320 is a component that directly shields the workpiece 200, and it has a sliding relationship with the connecting cylinder 310, allowing the cover 320 to extend or retract as needed.

[0043] Specifically, the connecting cylinder 310 has multiple sets of limiting rods 330 slidably connected inside, and the limiting rods 330 are fixedly connected to the cover 320. The function of the limiting rods 330 is to guide the sliding movement of the cover 320 to ensure that it is stable and controlled. A spring 340 is provided on the outside of the limiting rods 330, and one end of the spring 340 is fixedly connected to the connecting cylinder 310, and the other end is fixedly connected to the limiting rods 330.

[0044] It should be understood that when the pressure head assembly 140 moves downward, the cover 320 first contacts the workpiece 200, and under the action of the spring 340, the cover 320 is pressed down further, forming a relatively closed processing space with the workpiece 200 and the edge of the placement port 150. This closed space helps to effectively concentrate the cooling gas released by the pressure head assembly 140 and the cooling unit 400 after the hot pressing process is completed, making it less likely to escape, thereby improving the cooling efficiency of the workpiece 200.

[0045] When the pressure head assembly 140 is raised, the elastic force of the spring 340 pushes the cover 320 upward, causing it to detach from the workpiece 200, making it easier to pick up and put down the workpiece 200.

[0046] In another embodiment, according to the appendix Figure 9 As shown, the interior of the placement opening 150 is arranged in a stepped structure. The diameter of the top of the placement opening 150 is larger than the diameter of the bottom. The stepped structure facilitates the placement and positioning of the workpiece 200 and can stably support the workpiece 200 within the placement opening 150. The stepped surface of the placement opening 150 is used to place the workpiece 200.

[0047] Specifically, according to the appendix Figure 9 As shown, the cooling unit 400 includes a cooling cavity 410 annularly formed on the stepped surface of the placement opening 150. The cooling cavity 410 serves as a space for the annular distribution and pretreatment of cooling gas. The cooling unit 400 also includes multiple sets of cooling channels 420 formed along the circumference of the placement opening 150 inside the worktable 110. The cooling channels 420 are arranged in a U-shape, with one end of the cooling channel 420 connected to the interior of the cooling cavity 410 and the other end passing through the worktable 110 and connected to the outside of the worktable 110. The design of the U-shaped cooling channel 420 helps to prolong the contact time between the cooling gas and the interior of the worktable 110, enhancing the heat dissipation effect, or it can be used to form an intake and exhaust loop, allowing the cooling gas to enter the cooling cavity 410 from the outside through the cooling channel 420.

[0048] Furthermore, a contact plate 430 is provided on the cooling cavity 410. The contact plate 430 is fixedly connected to the stepped surface of the placement opening 150. The contact plate 430 can ensure the structural integrity of the cooling cavity 410 and assist in the uniform diffusion of cooling gas. The inner wall of the placement opening 150 has multiple sets of air outlets 440 in a ring shape, and the air outlets 440 are connected to the interior of the cooling cavity 410.

[0049] It should be noted that when the pressure head assembly 140 releases cooling gas, this gas enters the flow distribution assembly 144 inside the pressure head assembly 140 through the cooling pipe 1443 and is ejected from the flow distribution port 1442. It works together with the gas ejected from the cooling chamber 410 through the air outlet 440 to achieve comprehensive cooling of the workpiece 200 in both vertical and circumferential directions, ensuring the efficiency and uniformity of cooling.

[0050] In another embodiment, according to the appendix Figure 2 and attached Figure 10As shown, to ensure precise alignment of the workpiece 200 within the placement opening 150, a positioning unit 500 is provided below the placement opening 150. The positioning unit 500 includes a second cylinder 510 disposed below the placement opening 150 and mounted on the worktable 110. The second cylinder 510 is the driving component of the positioning unit 500, used to control the positioning action. A positioning plate 520 is mounted on the telescopic end of the second cylinder 510, and positioning rods 530 corresponding to multiple sets of connecting holes on the workpiece 200 are mounted on the positioning plate 520.

[0051] After the workpiece 200 is placed in place, the second cylinder 510 drives the positioning plate 520 to move upward, so that the positioning rod 530 on the positioning plate 520 is precisely matched and inserted into the multiple sets of connecting holes on the workpiece 200, thereby achieving precise fixing and positioning of the workpiece 200, which greatly improves the accuracy of hot pressing, avoids scrap caused by misalignment, and ensures the consistency of product quality.

[0052] In another embodiment, according to the appendix Figure 7 As shown, prolonged operation may cause the ultrasonic generator body 133 to overheat, affecting its performance and lifespan. To solve this problem, a heat dissipation unit 600 is provided on the fixed frame 131 and the movable frame 132. The heat dissipation unit 600 includes an air inlet 610 and an air outlet 620 opened on the movable frame 132, and a cooling fan 630 installed on the fixed frame 131, with the cooling fan 630 corresponding to the air inlet 610.

[0053] When the ultrasonic generator body 133 is in operation, the cooling fan 630 starts, drawing outside air into the movable frame 132 through the air inlet 610, creating an airflow to force-cool the ultrasonic generator body 133. The hot air is then exhausted through the air outlet 620. This active cooling mechanism ensures that the ultrasonic generator body 133 remains within a suitable temperature range even under prolonged high-intensity operation, thereby improving the operational stability of the equipment and extending its service life.

[0054] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. An automatic heat pressing device for heat insulation pad of automobile steering wheel, characterized in that, The utility model provides a kind of hot-pressing unit and hot-pressing device, including: Device body, the device body includes workbench and the connecting support mounted on workbench; The hot-pressing unit is symmetrically provided on the connecting support, and the telescopic end of the hot-pressing unit is provided with a pressure head assembly; The workbench is symmetrically provided with a placing opening, and the placing opening corresponds to the position of the pressure head assembly one by one; Workpiece, the workpiece is placed in the inside of the placing opening; When the workpiece is hot-pressed, the hot-pressing unit drives the pressure head assembly to move downward, so that the pressure head assembly contacts the workpiece, and the workpiece is hot-pressed; The cover unit is provided outside the pressure head assembly, and when the workpiece is hot-pressed, the cover unit covers the workpiece, so that a closed processing space is formed between the pressure head assembly and the workpiece; The cooling unit is provided along the circumference of the placing opening, and after the hot-pressing is completed, the pressure head assembly releases cooling gas to cool the workpiece, and the cooling gas passes through the cooling unit to cool the workpiece along the circumferential direction of the hot-pressed area of the workpiece.

2. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 1, characterized in that, The hot-pressing unit includes a fixed frame mounted on the connecting support, an activity frame is provided in the inside of the fixed frame, and an ultrasonic generator is provided in the inside of the activity frame, a first air cylinder is mounted on the fixed frame, and the telescopic end of the first air cylinder is fixedly connected with the activity frame through the fixed frame, and a heat dissipation unit is provided on the fixed frame and the activity frame.

3. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 2, characterized in that, The ultrasonic generator includes an ultrasonic generator body and an ultrasonic generator head, the ultrasonic generator head is assembled on the ultrasonic generator body, and the ultrasonic generator head is connected with the pressure head assembly.

4. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 3, characterized in that, The pressure head assembly includes a pressure plate bearing part mounted on the ultrasonic generator head, a pressure plate contact part is provided below the pressure plate bearing part, and a plurality of guide plates are mounted between the pressure plate contact part and the pressure plate bearing part.

5. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 4, characterized in that, The pressure head assembly further includes a flow distribution assembly provided between the pressure plate bearing part and the pressure plate contact part, the flow distribution assembly includes a flow distribution cylinder fixedly connected with the pressure plate bearing part and the pressure plate contact part, a plurality of flow distribution openings are annularly provided on the flow distribution cylinder, a cooling pipe is mounted on the flow distribution cylinder, and one end of the cooling pipe extends to the outer surface of the pressure plate bearing part through the pressure plate bearing part.

6. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 5, characterized in that, An air flow channel is formed between every two groups of guide plates, and every group of flow distribution openings corresponds to every group of air flow channels one by one.

7. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 1, characterized in that, The cover unit includes a connecting cylinder mounted on the pressure plate bearing part and a cover cover slidingly connected with the connecting cylinder.

8. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 1, characterized in that, The inside of the placing opening is provided in a stepped structure, the stepped surface of the placing opening is used for placing the workpiece, and a positioning unit is provided below the placing opening.

9. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 8, characterized in that, The cooling unit includes a cooling cavity annularly provided on the stepped surface of the placing opening, and a plurality of cooling channels are provided in the inside of the workbench along the circumferential direction of the placing opening; a contact plate is provided on the cooling cavity, and the contact plate is fixedly connected with the stepped surface of the placing opening.

10. The automatic hot-pressing device for heat insulation pad of automobile steering wheel according to claim 9, characterized in that, The cooling channel is arranged in a U-shaped structure, one end of the cooling channel is connected with the inside of the cooling cavity, and the other end of the cooling channel is connected with the outside of the workbench through the workbench.

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