Pressure control device for an ultrasonic welding machine

Abstract

The application relates to a pressure control device, in particular to a pressure control device of an ultrasonic welding machine, and belongs to the technical field of pressure control of welding machines; the device mainly comprises a regulation and control base, a multistage supporting frame, spring supporting rods, a stable adjusting part, a positioning operation plate, an electric height-adjusting sliding rail and a welding host; a pressure regulation and control groove is formed in the upper surface of the regulation and control base, the multistage supporting frame is slidingly installed in the groove, the spring supporting rods are fixed at the four corners of the multistage supporting frame, the stable adjusting part is used for regulating and controlling the initial contact supporting strength, the electric height-adjusting sliding rail is internally provided with a damping buffer part, and the welding host is connected with the damping buffer part; through the cooperation of the components, the initial supporting pressure can be accurately controlled, the pressure fluctuation in the welding process is inhibited, the working height can be flexibly adjusted, the stress of the workpiece is ensured to be uniform, the problems of virtual welding, pressure injury and deformation are greatly reduced, and the welding precision and quality stability are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of pressure control technology for welding machines, and more specifically to a pressure control device for an ultrasonic welding machine. Background Technology

[0002] The pressure control device of an ultrasonic welding machine is the core system for regulating the pressure exerted by the welding head on the workpiece. Mainstream types are pneumatic and servo: the pneumatic type uses a cylinder as the actuator, adjusting the air pressure through a pressure regulating valve or proportional valve, and achieving open-loop or simple closed-loop control with a pressure sensor. It is low-cost and has a fast response, but its accuracy is generally lower. The servo type uses a servo motor with a ball screw drive, combined with a high-precision pressure sensor and closed-loop algorithm. It can accurately set and dynamically adjust the pressure at each stage of pre-pressure, welding, and holding pressure, resulting in small pressure fluctuations and high stability, making it suitable for precision welding scenarios. The entire system ensures stable and uniform pressure during welding through pressure detection, feedback adjustment, and actuation drive, preventing incomplete welds or workpiece deformation.

[0003] Existing ultrasonic welding machine pressure control devices have mature structures, low manufacturing costs, simple installation and maintenance, and good operational reliability, which can meet the basic usage requirements of conventional welding scenarios. They also have strong overall adaptability and are suitable for mass production. However, they generally suffer from insufficient pressure adjustment accuracy and difficulty in stabilizing the initial support pressure. Pressure fluctuations are prone to occur during the welding process. At the same time, the height adjustment flexibility is poor and the buffering effect is inadequate, which can easily lead to uneven stress on the workpiece and quality defects such as incomplete welding and pressure damage. They cannot meet the stability requirements of precision welding. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a pressure control device for an ultrasonic welding machine, comprising at least:

[0005] The control base (1), multi-level support frame (2), spring support rod (3), stabilizing adjustment component (4), positioning operation plate (5), electric height adjustment slide rail (6), and welding host (7) are provided. The upper surface of the control base (1) is provided with a pressure control groove, and the pressure control groove is provided with a basic limiting groove on both sides and a rotating mounting plate with rotating mounting holes integrally formed at both ends. The multi-level support frame (2) is slidably assembled inside the pressure control groove. The multi-level support frame (2) includes at least two nested sliding components: a stabilizing connecting frame (201) and a positioning operation frame (202). The stabilizing connecting frame (201) is integrally formed with connecting sliders on both sides and slidably fitted with the basic limiting groove. The positioning operation frame (202) has an integrally formed anti-detachment slider on both sides and is slidably assembled with the inner side of the stable connecting frame (201) through the connecting groove; the spring support rod (3) is fixedly arranged at the four corners of the multi-level support frame (2), and the spring support rod (3) includes a base installation tube (301), a support connecting tube (303), and a positioning support tube (305) that are nested and slidably arranged in sequence. The base installation tube (301) is provided with a first-level support spring (302), the support connecting tube (303) is provided with a second-level support spring (304), and the positioning support tube (305) has a connecting threaded hole at the upper end; the stabilizing adjustment component (4) is set inside the pressure regulating groove. Furthermore, it is connected to the multi-stage support frame (2) for transmission to adjust the initial contact support strength. The stabilizing adjustment component (4) includes at least two reverse drive screws (401), meshing linkage gears (402), adjusting motor (403), damping adjusting frame (404), damping connecting plate (405), stabilizing support spring (406), and stabilizing support rod (407). The reverse drive screws (401) are rotatably installed in the rotatable mounting hole of the rotatable mounting plate. The output end of the adjusting motor (403) is connected to one of the reverse drive screws (401). The damping adjusting frame (404) is threadedly connected to the reverse drive screws (401) and has a damping device on its inner wall. The damping connecting plate (405) is damped and slidably disposed inside the damping adjustment frame (404). The two ends of the stabilizing support rod (407) are respectively rotatably connected to the damping connecting plate (405) and the positioning operation frame (202). The positioning operation frame (202) has fixed storage slots at its four corners. Fixed connection holes are provided in the fixed storage slots. Fixed bolts (203) are threaded through the fixed connection holes and threadedly locked to the connection thread holes of the positioning support tube (305). The positioning operation plate (5) is assembled on the upper surface of the multi-level support frame (2) to support the workpiece. The positioning operation plate (5) has a positioning card block integrally formed on the lower surface of the positioning operation plate (5). The positioning card block is slidably embedded into the fixed storage slot.The electric height adjustment slide rail (6) is fixedly connected to the control base (1). The electric height adjustment slide rail (6) includes at least a vertical electric rail (601), a linear screw motor (602), a U-shaped mounting frame (603), a damping mounting block (604), and a damping support spring (605). The lower end of the vertical electric rail (601) is fixed to the control base (1). The linear screw motor (602) is assembled on the vertical electric rail (601). The U-shaped mounting frame (603) and the linear screw motor (602) slide together with a threaded connection. The damping mounting block (604)... The damping slide is located inside the U-shaped mounting frame (603). The damping support spring (605) is fitted onto the output end of the linear screw motor (602) to form the damping buffer. The electric height adjustment slide rail (6) has a built-in damping buffer. The welding host (7) is rigidly fixed to the damping buffer. The stabilizing adjustment component (4) and the spring support rod (3) cooperate to form a graded elastic support structure. The damping buffer inside the electric height adjustment slide rail (6) is fixedly connected to one side of the welding host (7). The electric height adjustment slide rail (6) drives the welding host (7) to vertically raise and lower to adjust the working height.

[0006] The purpose of this invention is to solve the problems of insufficient pressure adjustment accuracy, difficulty in stabilizing the initial support pressure, easy pressure fluctuation during the welding process, poor height adjustment flexibility, poor buffering effect, and easy uneven stress on the workpiece, resulting in quality defects such as incomplete welding and pressure damage deformation.

[0007] Compared with the prior art, the advantages of the present invention are as follows:

[0008] This device, through the cooperation of multi-stage support frames, graded spring support rods and stabilizing adjustment components, can precisely control the initial support pressure and effectively suppress pressure fluctuations during the welding process. At the same time, combined with an electric height adjustment slide rail and a damping buffer structure, the working height can be flexibly adjusted and the buffering effect can be improved, ensuring that the workpiece is subjected to uniform and stable force, reducing problems such as incomplete welding, pressure damage and deformation, and significantly improving welding accuracy and quality stability. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the pressure control device of the ultrasonic welding machine of the present invention;

[0011] Figure 2 This is a right sectional view of the pressure control device of the ultrasonic welding machine of the present invention.

[0012] Figure 3 This is a left sectional view of the pressure control device of the ultrasonic welding machine of the present invention.

[0013] Figure 4 This is a schematic diagram of the pressure control device of the ultrasonic welding machine of the present invention;

[0014] Figure 5 This is a schematic diagram of the structure of the pressure control device adjustment base of the ultrasonic welding machine of the present invention;

[0015] Figure 6 This is a schematic diagram of the stable connection frame of the pressure control device of the ultrasonic welding machine of the present invention;

[0016] Figure 7 This is a schematic diagram of the positioning operation frame of the pressure control device of the ultrasonic welding machine of the present invention;

[0017] Figure 8 This is a schematic diagram of the stabilizing adjustment component of the pressure control device for the ultrasonic welding machine of the present invention;

[0018] Figure 9 This is a schematic diagram of the positioning operation panel of the pressure control device of the ultrasonic welding machine of the present invention.

[0019] Reference numerals in the attached diagram: 1-Adjustable base; 2-Multi-stage support frame; 201-Stabilizing connection frame; 202-Positioning operation frame; 203-Fixing bolt; 3-Spring support rod; 301-Foundation mounting tube; 302-First-stage support spring; 303-Support connecting tube; 304-Second-stage support spring; 305-Positioning support tube; 4-Stabilizing adjustment component; 401-Reverse drive screw; 402-Linkage gear; 403-Adjusting motor; 404-Damping adjustment frame; 405-Damping connecting plate; 406-Stabilizing support spring; 407-Stabilizing support rod; 5-Positioning operation plate; 6-Electric height adjustment slide rail; 601-Vertical electric rail; 602-Linear screw motor; 603-U-shaped mounting frame; 604-Damping mounting block; 605-Damping support spring; 7-Welding main unit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Figures 1-9This invention illustrates a pressure control device for an ultrasonic welding machine, specifically comprising:

[0022] Figure 1 To adjust base 1, by Figure 5 It is evident that the lower side is a conventional control structure, and the upper surface has a pressure regulating groove; basic limiting grooves are set on both sides of the pressure regulating groove, and rotating mounting plates with rotating mounting holes are integrally set at both ends of the pressure regulating groove; multi-stage support frame 2 is slidably installed in the pressure regulating groove; multi-stage support frame 2 includes: a stable connecting frame 201, which is slidably set in the pressure regulating groove; by Figure 6 and Figure 7 As can be seen, the multi-level support frame 2 includes at least two nested sliding components: a stable connecting frame 201 and a positioning operation frame 202. The stable connecting frame 201 is slidably disposed in the pressure regulating groove, and connecting sliders that are slidably connected to the foundation limiting groove are provided on both sides of the stable connecting frame 201. The connecting sliders are integrally formed with the stable connecting frame 201. The positioning operation frame 202 is slidably installed in the stable connecting frame 201. Connecting grooves are provided on both sides of the interior of the stable connecting frame 201, and anti-detachment sliders that are slidably connected to the connecting grooves are provided on both outer surfaces of the positioning operation frame 202. The anti-detachment sliders are integrally formed with the positioning operation frame 202.

[0023] The multi-level support frame 2, as the core load-bearing and guiding structure of the ultrasonic welding machine pressure control device, is slidably assembled inside the pressure control groove of the control base 1. It consists of a two-layer nested structure: a stable connecting frame 201 and a positioning operation frame 202. The stable connecting frame 201 is slidably connected to the basic limiting grooves on both sides of the pressure control groove through integrated connecting sliders on both sides, playing the role of guiding and limiting the outer foundation and preventing the overall support frame from shifting or shaking laterally, ensuring that the lifting trajectory of the foundation is straight and stable. The positioning operation frame 202 is slidably connected to the connecting groove inside the stable connecting frame 201 through integrated anti-detachment sliders on both sides. This not only achieves secondary precise guidance in the inner layer, forming a double-layer limiting and buffering effect with the outer stable connecting frame 201, but also effectively prevents slippage and jamming during lifting through the anti-detachment sliders. At the same time, relying on the double-layer nested sliding design, the force during welding pressure is distributed, improving the stability and pressure bearing capacity of the overall support structure. This provides a solid and smooth support foundation for subsequent precise pressure control and stable placement of the workpiece, eliminating the problem of uneven force on the workpiece caused by support sway from a structural perspective.

[0024] like Figure 2 As shown, the spring support rod 3 is fixed at the four corners of the multi-stage support frame 2; by Figure 3As can be seen, the spring support rod 3 includes a base mounting tube 301, a support connecting tube 303, and a positioning support tube 305 that are nested and slidably arranged in sequence. The base mounting tube 301 is welded and fixed to the bottom of the pressure regulating groove. The primary support spring 302 is disposed inside the base mounting tube 301 to provide strong support. The support connecting tube 303 is slidably disposed inside the base mounting tube 301, and its lower surface is fixedly connected to the upper end of the primary support spring 302. The secondary support spring 304 is installed inside the support connecting tube 303 to provide secondary support. The positioning support tube 305 is slidably disposed inside the support connecting tube 303, and its lower end is fixedly connected to the secondary support spring 304. A connecting threaded hole is provided at its upper end. The spring support rod 3 adopts a nested, graded elastic structure. Through the sequential sliding cooperation of the base mounting tube 301, the support connecting tube 303, and the positioning support tube 305, two levels of elastic support with different strengths are formed by the first-level support spring 302 and the second-level support spring 304. This provides graded buffering force during the initial contact stage of welding, which can ensure the support stiffness and effectively reduce instantaneous impact. At the same time, the evenly distributed arrangement at the four corners can make the force more balanced and avoid excessive local pressure. The connecting threaded hole at the upper end facilitates a stable connection with the upper structure, thus improving the stability and reliability of welding pressure control as a whole.

[0025] The stabilizing adjustment component 4, located inside the pressure regulating groove, is used to regulate the initial contact support strength of the multi-stage support frame 2; Figure 8 As can be seen, the stabilizing adjustment component 4 includes at least two reverse drive screws 401, meshing linkage gears 402, an adjusting motor 403, a damping adjusting frame 404, a damping connecting plate 405, a stabilizing support spring 406, and a stabilizing support rod 407. The reverse drive screws 401 are rotatably installed in the rotating mounting holes of the rotating mounting plate, and one end of each screw is welded and fixed to the meshing linkage gear 402. The adjusting motor 403 is fixed to the lower surface of the pressure regulating groove, and its output end is fixedly connected to one of the reverse drive screws 401. The damping adjusting frame 404 is threadedly connected to the reverse drive screws 401, and the inner surface of the damping adjusting frame 404 is a damping surface. The damping connecting plate 405 is damping slidably installed on the damping adjustment plate 406. The damping adjustment frame 404 is internally fitted with a stabilizing support spring 406, which is fixed inside the frame. The lower end of the stabilizing support rod 407 is rotatably mounted on the outside of the damping connecting plate 405, and its upper end is rotatably connected to the positioning operation frame 202. The damping adjustment frame 404 has an adjusting threaded hole that is threadedly connected to the reverse drive screw 401. The lower surface of the damping adjustment frame 404 is in contact with the lower surface of the pressure regulating groove. Adjusting connecting shafts are welded and fixed to the outside of the damping connecting plate 405. A support connecting shaft is fixedly installed on the lower surface of the positioning operation frame 202. Support transition holes are provided at both ends of the stabilizing support rod 407, and these holes are rotatably connected to the adjusting connecting shaft and the support connecting shaft, respectively.

[0026] The stabilizing adjustment component 4 drives the meshing linkage gear 402 through the adjusting motor 403, which drives the reverse drive screw 401 to operate synchronously, thereby controlling the damping adjustment frame 404 to move in opposite directions. With the transmission support of the damping connecting plate 405, the stabilizing support spring 406 and the stabilizing support rod 407, it can accurately control the initial contact support strength of the multi-stage support frame 2. At the same time, by utilizing the buffering effect of the damping surface and the stabilizing support spring 406, it effectively suppresses pressure fluctuations during the welding process, ensures stable and uniform support force, and improves the accuracy and stability of welding pressure adjustment.

[0027] The positioning operation plate 5 is set on the upper surface of the multi-level support frame 2; the positioning operation frame 202 has fixed storage slots at all four corners, and a fixed connection hole is set at the center of the fixed storage slot. The position of the fixed connection hole corresponds to the position of the connection thread hole, and a fixing bolt 203 is slidably installed inside the fixing thread hole and threadedly connected to the connection thread hole. The fixing bolt 203 is threadedly locked to the connection thread hole; the lower surface of the positioning operation plate 5 has a positioning block slidably connected to the fixed storage slot at each of the four corners; the pressure adjustment slot has a rotating mounting plate slidably installed at both ends, which rotates... Rotary mounting holes are provided on both sides of the mounting plate. The reverse drive screw 401 is rotatably installed in the rotary mounting hole. The damping adjustment frame 404 has an adjustment thread hole that is threadedly connected to the reverse drive screw 401. The lower surface of the damping adjustment frame 404 is in contact with the lower surface of the pressure adjustment groove. Adjustment connecting shafts are welded and fixed to the outer side of the damping connecting plate 405. A support connecting shaft is fixedly installed on the lower surface of the positioning operation frame 202. Support transition holes are provided at both ends of the stabilizing support rod 407. The support transition holes are rotatably connected to the adjustment connecting shaft and the support connecting shaft, respectively.

[0028] The positioning operation plate 5 achieves precise positioning and assembly by cooperating with the positioning blocks at its four corners and the fixed storage slots on the positioning operation frame 202. It is then secured by fixing bolts 203 passing through the fixed connection hole and the threaded connection hole of the positioning support tube 305, ensuring the positioning operation plate 5 is firmly installed and accurately positioned, preventing displacement during welding. Simultaneously, the rotating mounting plate and rotating mounting hole provide stable rotational support for the reverse drive screw 401, ensuring smooth and reliable transmission. The damping adjustment frame 404, through its adjusting threaded hole, engages with the reverse drive screw 401 and moves in contact with the bottom surface of the pressure adjustment slot, effectively improving adjustment accuracy and stability. The rotating connection structure of the adjusting connecting shaft, the supporting connecting shaft, and the stable support rod 407 ensures smooth support transmission, reduces transmission jamming, and further enhances the operational stability and pressure regulation reliability of the entire pressure control device.

[0029] like Figure 3 As shown, the electrically adjustable height slide rail 6 is equipped with a damping buffer to control the working height of the device; Figure 3 and Figure 4 As can be seen, the electric height adjustment slide rail 6 includes at least a vertical electric rail 601, a linear screw motor 602, a U-shaped mounting frame 603, a damping mounting block 604, and a damping support spring 605. The lower end of the vertical electric rail 601 is fixedly connected to the adjustment base 1, and the linear screw motor 602 is fixedly mounted on one end. The U-shaped mounting frame 603 is slidably installed inside the vertical electric rail 601, and a vertical threaded hole with a threaded connection to the linear screw motor 602 is opened at its center. The damping mounting block 604 is dampingly slidably installed inside the U-shaped mounting frame 603, and a vertical sleeve hole with a slidable connection to the linear screw motor 602 is opened at its center. The damping support spring 605 is fitted onto the output end of the linear screw motor 602, and the upper end of the damping support spring 605 is fixedly connected to the U-shaped mounting frame 603, and the lower end is fixedly connected to the damping mounting block 604. The damping mounting block 604 and the damping support spring 605 together constitute the damping buffer.

[0030] like Figure 3 As shown, the welding host 7 is fixedly connected to the damping buffer on one side. Figure 3 and Figure 4 As shown, the electric height-adjusting slide rail 6 serves as the core component for height adjustment and welding buffering in the entire pressure control device. It is primarily used for precise control of the overall working height of the device, adapting to the welding requirements of workpieces of different specifications and thicknesses. Internally, it is equipped with damping buffer components, working in conjunction with the welding host 7 to achieve integrated operation. The overall structure uses a vertical electric rail 601 as a fixed support carrier, with its lower end securely connected to the adjustment base 1. A linear screw motor 602 at one end serves as the power source, driving the U-shaped mounting frame 603 to smoothly rise and fall along the interior of the vertical electric rail 601. Through the threaded transmission of the vertical threaded hole, precise fine-tuning and positioning of the working height are achieved, preventing deviations in height adjustment. Simultaneously, the damping mounting block 60... The 4-dampening sliding mount is installed inside the U-shaped mounting frame 603 and is movably connected to the linear screw motor 602 through the vertical sleeve hole. The two ends of the externally mounted stabilizing support spring 406 are respectively connected to the U-shaped mounting frame 603 and the damping mounting block 604 to form an elastic buffer structure. One side of the welding host 7 is directly fixedly connected to the damping buffer. This not only allows for quick electric adjustment of the welding operation height, eliminating the tedious steps of manual adjustment, but also buffers the instantaneous impact force and mechanical vibration in real time when the welding host 7 is pressing down, offsetting the pressure change during the welding process, preventing the workpiece from being crushed or deformed due to rigid impact, while ensuring smooth and unobstructed lifting and adjustment process, further improving the operational stability and welding operation adaptability of the entire device.

[0031] Example 1: Welding conditions for workpieces of conventional thickness

[0032] like Figure 2 and Figure 4As shown, the components of this device are assembled according to the above structure. The stabilizing adjustment component 4 and the spring support rod 3 cooperate to form a graded elastic support structure. The damping buffer inside the electric height adjustment slide rail 6 is fixedly connected to one side of the welding host 7. The electric height adjustment slide rail 6 can drive the welding host 7 to vertically raise and lower to adjust the working height.

[0033] In use: When welding workpieces of conventional thickness, the U-shaped mounting frame is first driven to rise and fall along the vertical electric rail 601 by the linear screw motor 602, adjusting the welding host 7 to the appropriate working height; the workpiece is placed on the positioning operation plate 5, and the motor 403 is adjusted to run, driving the reverse drive screw 401 to rotate synchronously through the linkage gear 402, causing the damping adjustment frame 404 to move towards or away from each other, and the positioning operation frame 202 is adjusted to the appropriate initial support height through the stabilizing support rod 407; when the welding host 7 presses down, the multi-stage support frame 2 slides smoothly in the pressure control groove, and the first-stage support spring 302 and the second-stage support spring 304 in the spring support rod 3 form a graded elastic support, which, together with the damping surface inside the stabilizing adjustment component 4 and the damping buffer structure of the stabilizing support spring 406, buffers the pressure changes during the welding process. The damping mounting block 604 and the damping support spring 605 inside the electric height adjustment slide rail 6 synchronously absorb the downward impact, ensuring that the workpiece is subjected to uniform force and completing stable welding.

[0034] Example 2: Precision thin workpiece welding condition

[0035] The basic assembly structure of this embodiment is completely the same as that of Embodiment 1.

[0036] In use: When welding precision thin workpieces, the adjustment motor 403 is started to adjust the damping adjustment frame 404 to a smaller gap, improving the initial support stiffness and buffer sensitivity of the positioning operation frame 202 and reducing the initial contact pressure; when the welding host 7 presses down, the damping mounting block 604 in the electric height adjustment slide rail 6 cooperates with the stabilizing support spring 406 to perform secondary buffering and attenuation of the welding impact force; the positioning operation plate 5 is precisely positioned by the positioning card block and the fixed storage groove, and with the anti-detachment slider and the connecting slider of the multi-level support frame 2, double-layer guide limit is provided to avoid the deformation of thin parts caused by downward sway; the graded spring and the stabilizing adjustment component 4 work together to achieve precise control of small pressure, effectively preventing workpiece damage and incomplete welding, and meeting the requirements of precision welding.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that 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, and 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.

Claims

1. A pressure control device for an ultrasonic welding machine, characterized in that, At least including: Adjustable base (1), multi-level support frame (2), spring support rod (3), stabilizing adjustment component (4), positioning operation plate (5), electric height adjustment slide rail (6), welding host (7); The upper surface of the regulating base (1) is provided with a pressure regulating groove, and the pressure regulating groove is provided with a basic limiting groove on both sides and a rotating mounting plate with rotating mounting holes integrally formed at both ends; the multi-level support frame (2) is slidably assembled inside the pressure regulating groove, and the multi-level support frame (2) includes at least two nested sliding components: a stable connecting frame (201) and a positioning operation frame (202). The stable connecting frame (201) has integrally formed connecting sliders on both sides that slide in cooperation with the basic limiting groove, and the positioning operation frame (202) has integrally formed anti-detachment sliders on both sides that slide in cooperation with the inner connecting groove of the stable connecting frame (201); The spring support rod (3) is fixedly arranged at the four corners of the multi-level support frame (2). The spring support rod (3) includes a base mounting tube (301), a support connecting tube (303), and a positioning support tube (305) that are nested and slid in sequence. The base mounting tube (301) is provided with a first-level support spring (302), the support connecting tube (303) is provided with a second-level support spring (304), and the positioning support tube (305) has a connecting threaded hole at the upper end. The stabilizing adjustment component (4) is set inside the pressure regulating groove and is connected to the multi-level support frame (2) to regulate the initial contact support strength. The component (4) includes at least two reverse drive screws (401), meshing linkage gears (402), an adjusting motor (403), a damping adjusting frame (404), a damping connecting plate (405), a stabilizing support spring (406), and a stabilizing support rod (407). The reverse drive screws (401) are rotatably mounted in the rotating mounting holes of the rotating mounting plate. The output end of the adjusting motor (403) is connected to one of the reverse drive screws (401). The damping adjusting frame (404) is threadedly connected to the reverse drive screws (401) and has a damping surface on its inner wall. The damping connecting plate (405) provides damping. The damping adjustment frame (404) is slidably located inside the stabilizing support rod (407). The two ends of the stabilizing support rod (407) are respectively rotatably connected to the damping connecting plate (405) and the positioning operation frame (202). The positioning operation frame (202) has fixed storage slots at its four corners. Fixed connection holes are provided in the fixed storage slots. Fixed bolts (203) are threaded through the fixed connection holes and threadedly locked to the connection thread holes of the positioning support tube (305). The positioning operation plate (5) is assembled on the upper surface of the multi-level support frame (2) to support the workpiece. The positioning operation plate (5) has a positioning card block integrally formed on the lower surface of the positioning operation plate (5). The positioning card block is slidably embedded into the fixed storage slot.The electric height adjustment slide rail (6) is fixedly connected to the control base (1). The electric height adjustment slide rail (6) includes at least a vertical electric rail (601), a linear screw motor (602), a U-shaped mounting frame (603), a damping mounting block (604), and a damping support spring (605). The lower end of the vertical electric rail (601) is fixed to the control base (1). The linear screw motor (602) is assembled on the vertical electric rail (601). The U-shaped mounting frame (603) and the linear screw motor (602) slide together with a threaded connection. The damping mounting block (604)... The damping slide is located inside the U-shaped mounting frame (603). The damping support spring (605) is fitted onto the output end of the linear screw motor (602) to form the damping buffer. The electric height adjustment slide rail (6) has a built-in damping buffer. The welding host (7) is rigidly fixed to the damping buffer. The stabilizing adjustment component (4) and the spring support rod (3) cooperate to form a graded elastic support structure. The damping buffer inside the electric height adjustment slide rail (6) is fixedly connected to one side of the welding host (7). The electric height adjustment slide rail (6) drives the welding host (7) to vertically raise and lower to adjust the working height.

2. The pressure control device for an ultrasonic welding machine according to claim 1, characterized in that, The stable connecting frame (201) and the positioning operation frame (202) rely on the connecting slider and the anti-detachment slider to form a double-layer limiting guide structure, which restricts the lateral displacement of the multi-level support frame (2).

3. The pressure control device for an ultrasonic welding machine according to claim 1, characterized in that, The primary support spring (302) and the secondary support spring (304) provide two levels of elastic support with different strengths, forming a graded buffer support structure.

4. The pressure control device for an ultrasonic welding machine according to claim 1, characterized in that, The regulating motor (403) drives two opposing drive screws (401) to rotate synchronously through the linkage gear (402), which drives the damping adjustment frame (404) to move horizontally. The damping connecting plate (405) slides against the damping surface of the damping adjustment frame (404) to achieve damping pressure adjustment.

Images