Ultrasonic welding method for thermoplastic composite t-stiffened panels
Patent Information
- Application Number
- CN202611086283.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-21
- Publication Date
- 2026-10-30
AI Technical Summary
1.胶接工艺：粘接剂固化周期长、耐湿热性能差，接头易分层脱粘，服役可靠性低
[0005]本发明的目的是提供一种热塑性复材T型加筋壁板的超声波焊接方法，其能实现对T 型筋底部圆角区域以及左、右边缘条接触面充分熔融结合，消除未焊合缺陷，大幅提升壁板的强度。
Smart Images
Figure CN123001224A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of thermoplastic composite material joining process and equipment manufacturing technology, and more particularly to an ultrasonic welding method for thermoplastic composite T-shaped stiffened wall panels. Background Technology
[0002] Thermoplastic carbon fiber composites possess advantages such as remelting and welding capabilities, good toughness, and recyclability, making them widely used in large load-bearing wall panel structures. T-shaped stiffened wall panels are typical load-bearing structural components, and the connection quality between the stiffeners and the wall panel directly determines the overall mechanical properties. Currently, the mainstream connection methods for T-shaped stiffened wall panels are divided into three categories: adhesive bonding, resistance welding, and traditional ultrasonic welding, all of which have certain drawbacks. 1. Adhesive bonding process: The adhesive has a long curing cycle, poor resistance to damp heat, and the joint is prone to delamination and detachment, resulting in low service reliability.
[0003] 2. Resistance welding: A conductive metal layer needs to be embedded, which increases the structural weight. Conductive foreign objects will reduce the corrosion resistance and fatigue performance of composite materials.
[0004] 3. Conventional single-pass ultrasonic welding: Welding is performed only on one side of the wall panel in a single pass. For the bottom and rounded corners of T-shaped ribs, the rigidity is high, the transmission of ultrasonic vibration is hindered, the efficiency of heat generation from interface friction is extremely low, a large area of the weld interface is not welded, the pull-out strength of the joint is insufficient, the internal residual stress is concentrated, and long-term use is prone to delamination and cracking, which cannot meet the strength index of the main load-bearing component. Summary of the Invention
[0005] The purpose of this invention is to provide an ultrasonic welding method for thermoplastic composite T-shaped stiffened wall panels, which can achieve full fusion bonding of the bottom rounded corner area of the T-shaped stiffener and the contact surfaces of the left and right edge strips, eliminate incomplete welding defects, and significantly improve the strength of the wall panel.
[0006] To achieve the above objectives, the present invention provides an ultrasonic welding method for a thermoplastic composite T-shaped stiffened wall panel, comprising the following steps: Step 1: Abut and position the thermoplastic composite T-shaped reinforcing ribs against the thermoplastic composite wall panel; Step 2: Provide energy-conducting ribs between the contact surfaces of the thermoplastic composite T-shaped reinforcing ribs and the thermoplastic composite wall panel; Step 3: On one side of the thermoplastic composite wall panel, ultrasonic welding is performed on the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib. Step 4: On one side of the thermoplastic composite T-shaped reinforcing rib, perform ultrasonic welding on one edge strip area of the thermoplastic composite T-shaped reinforcing rib. Step 5: On one side of the thermoplastic composite T-shaped reinforcing rib, ultrasonic welding is performed on the other edge strip area of the thermoplastic composite T-shaped reinforcing rib. Compared with existing technologies, this invention solves the problems of high stiffness of the T-shaped stiffener and difficulty in vibration transmission by setting energy-conducting ribs between the contact surface of the thermoplastic composite material T-shaped stiffener and the thermoplastic composite material wall panel, and by using three-pass partition welding of the bottom rounded corner, left edge strip, and right edge strip, and applying ultrasonic vibration from the wall panel side and the edge strips on both sides of the stiffener. This makes the frictional heat generation of the entire welding interface uniform, so that the bottom rounded corner area of the T-shaped stiffener and the contact surface of the left and right edge strips are fully fused together, reducing the internal stress and unwelded defects at the interface of the bottom and rounded corner area of the T-shaped stiffener, improving the consistency of welding quality, thereby improving the stability of welding quality, and significantly increasing the strength of the wall panel.
[0007] Preferably, in step one, an infrared positioning system is used to position the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel.
[0008] Preferably, the thermoplastic composite material is a carbon fiber reinforced PEEK, PEKK, PPS or PA matrix composite material; the energy-conducting rib is a corresponding matrix resin film with a thickness of 100μm to 300μm.
[0009] Preferably, according to a predetermined position, a hydraulic clamping fixture is used to fix the end of the thermoplastic composite T-shaped reinforcing rib away from the thermoplastic composite wall panel and the opposite ends of the thermoplastic composite wall panel.
[0010] Preferably, step three includes the following steps: selecting an ultrasonic welding head with the same width as the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib; starting ultrasonic welding, applying pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and performing ultrasonic vibration on the contact surface between the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib to melt and bond the corresponding positions of the energy-conducting rib to form a welded joint; and allowing the welded workpiece to cool naturally.
[0011] Preferably, step four includes the following steps: selecting an ultrasonic welding head with a width equal to one of the edge strip regions of the thermoplastic composite T-shaped reinforcing rib; initiating ultrasonic welding, applying pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and performing ultrasonic vibration on the contact surface of one of the edge strip regions of the thermoplastic composite T-shaped reinforcing rib to melt and fuse the corresponding positions of the energy-conducting rib to form a welded joint; and allowing the welded workpiece to cool naturally.
[0012] Specifically, before welding, the following steps are also included: removing the fixation of one end of the thermoplastic composite T-shaped reinforcing rib away from the thermoplastic composite wall panel; applying a pressure block tool to the other edge strip area of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
[0013] Preferably, step five includes the following steps: selecting an ultrasonic welding head with the same width as the other edge strip area of the thermoplastic composite T-shaped reinforcing rib; starting ultrasonic welding, applying pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and performing ultrasonic vibration on the contact surface of the other edge strip area of the thermoplastic composite T-shaped reinforcing rib, so that the corresponding positions of the energy-conducting ribs melt together to form a welded joint; and allowing the welded workpiece to cool naturally.
[0014] Specifically, before welding, the following steps are also included: applying a pressure block tool to one of the edge strip areas of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
[0015] Specifically, the pressure applied to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel is 10-30 MPa; the ultrasonic frequency is 10-30 kHz; and the welding speed is 10-20 mm / s. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0017] Figure 1 This is a flowchart of the ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel of the present invention.
[0018] Figure 2 This is a structural diagram of the thermoplastic composite material T-shaped reinforcing rib and thermoplastic composite material wall panel of the present invention.
[0019] Figure 3 This is a diagram showing the state of the bottom and rounded corner areas of a thermoplastic composite T-shaped reinforcing rib when the ultrasonic welding head of this invention is used for ultrasonic welding.
[0020] Figure 4 This is a diagram showing the state of the left edge strip area of the T-shaped reinforcing rib of thermoplastic composite material when the ultrasonic welding head of the present invention is used for ultrasonic welding.
[0021] Figure 5This is a state diagram of the ultrasonic welding head of the present invention performing ultrasonic welding on the right edge strip area of a T-shaped reinforcing rib of thermoplastic composite material.
[0022] Figure 6 This is a diagram showing the state of ultrasonic welding performed by the ultrasonic welding head of the present invention on the joint area between the T-shaped reinforcing rib of thermoplastic composite material and the wall panel in one operation.
[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0024] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure 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 disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.
[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0026] Example 1 Please see Figure 1 To achieve the above objectives, the present invention provides an ultrasonic welding method for thermoplastic composite T-shaped stiffened wall panels, comprising the following steps: Step S1 involves abutting and positioning the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel. In this step, an infrared positioning system is used to position the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, improving positioning accuracy. According to the predetermined positions, a hydraulic clamping fixture is used to fix the end of the thermoplastic composite T-shaped reinforcing rib away from the thermoplastic composite wall panel and the opposite ends of the thermoplastic composite wall panel.
[0027] Step S2: Energy-conducting ribs are provided between the contact surfaces of the thermoplastic composite T-shaped reinforcing ribs and the thermoplastic composite wall panel. The thermoplastic composite material is a carbon fiber reinforced PEEK, PEKK, PPS, or PA matrix composite material; the energy-conducting ribs are corresponding matrix resin films with a thickness of 100μm to 300μm.
[0028] Step S3: On one side of the thermoplastic composite wall panel, ultrasonic welding is performed on the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib. Specifically, this step includes the following steps: 1. Select an ultrasonic welding head with the same width as the bottom and rounded corner area of the thermoplastic composite T-shaped reinforcing rib.
[0029] 2. Initiate ultrasonic welding, apply pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and perform ultrasonic vibration on the contact surface of the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib to fuse and form a welded joint at the corresponding positions of the energy-conducting rib. The pressure of the contact surface is 10-30 MPa, the ultrasonic frequency is 10-30 kHz, and the welding speed is 10-20 mm / s.
[0030] 3. Allow the welded workpiece to cool naturally.
[0031] Step S4: On one side of the thermoplastic composite T-shaped reinforcing rib, ultrasonic welding is performed on one edge strip area of the thermoplastic composite T-shaped reinforcing rib. Specifically, this step includes the following steps: 1. Select an ultrasonic welding head with a width equal to one of the edge strip regions of the thermoplastic composite T-shaped reinforcing rib.
[0032] 2. Remove the fixing of the end of the thermoplastic composite material T-shaped reinforcing rib away from the thermoplastic composite material wall panel.
[0033] 3. Apply a pressure block tool to the other edge strip area of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
[0034] 4. Initiate ultrasonic welding, apply pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and perform ultrasonic vibration on the contact surface of one edge strip area of the thermoplastic composite T-shaped reinforcing rib, causing the corresponding positions of the energy-conducting rib to fuse and form a welded joint. The pressure of the contact surface is 10-30 MPa, the ultrasonic frequency is 10-30 kHz, and the welding speed is 10-20 mm / s.
[0035] 5. Allow the welded workpiece to cool naturally.
[0036] Step S5: On one side of the thermoplastic composite T-shaped reinforcing rib, ultrasonic welding is performed on the other edge strip area of the thermoplastic composite T-shaped reinforcing rib. Specifically, this step includes the following steps: 1. Apply a pressure block tooling to one of the edge strip areas of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
[0037] 2. Select an ultrasonic welding head with the same width as the other edge strip area of the thermoplastic composite T-shaped reinforcing rib.
[0038] 3. Initiate ultrasonic welding, apply pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and perform ultrasonic vibration on the contact surface of the other edge strip area of the thermoplastic composite T-shaped reinforcing rib, causing the corresponding positions of the energy-conducting rib to fuse and form a welded joint. The pressure of the contact surface is 10-30 MPa, the ultrasonic frequency is 10-30 kHz, and the welding speed is 10-20 mm / s.
[0039] 4. Allow the welded workpiece to cool naturally.
[0040] Please see Figures 2 to 5 The figure shows the ultrasonic welding method of the thermoplastic composite T-shaped stiffened wall panel 2 of Embodiment 1 of the present invention.
[0041] like Figure 1 and Figure 2 As shown, this embodiment employs an ultrasonic welding system with a multi-angle adaptive clamping fixture. Specifically, the clamping fixture 3 can effectively clamp the thermoplastic composite T-shaped reinforcing rib 1 and the thermoplastic composite wall panel 2 respectively. The clamping fixture 3 is combined with a hydraulic and infrared positioning system, with the hydraulic system pressure ranging from 0.1 to 40 MPa. The ultrasonic welding head 5 is provided with high-frequency vibration by an ultrasonic generator to weld the thermoplastic composite T-shaped reinforcing rib 1 and the thermoplastic composite wall panel 2. The energy-conducting rib 6, which is a 200-micron thick PEEK film, is placed between the T-shaped reinforcing rib 1 and the wall panel 2 to ensure that the energy generated by the ultrasonic vibration is concentrated at the connection interface. The thermoplastic composite material is carbon fiber reinforced polyphenylene sulfide composite material (CF / PEEK). The wall panel 2 has a size of 200 mm × 200 mm × 2 mm. The T-shaped reinforcing rib 1 corresponds to a welding area size of 60 mm × 200 mm. The bottom and rounded corner area 11 of the T-shaped reinforcing rib 1 has a width of 20 mm. The left and right edge strips 13 and the reinforcing ribs are all 2 mm thick.
[0042] The specific operation process of this embodiment is as follows: I. Ultrasonic continuous welding process for the bottom and rounded corner area 11 of T-shaped reinforcing rib 1. Please refer to [link / reference]. Figure 3 The CF / PEEK thermoplastic composite T-shaped reinforcing rib 1 is abutted against the wall panel 2, and precisely positioned using an infrared system. Independent PEEK film energy-conducting ribs 6 are fixed between the T-shaped reinforcing rib 1 and the wall panel 2. According to the predetermined positions, the top of the T-shaped reinforcing rib 1 and both sides of the wall panel 2 are fixed using an adaptable hydraulic clamping fixture 3, with a pressure of 20 MPa. A 20 mm wide ultrasonic welding head 5, the same width as the bottom and rounded corner area 11 of the T-shaped reinforcing rib 1, is selected. The ultrasonic welding head 5 is lowered to the surface of the workpiece on the wall panel 2 and a welding pressure of 1200 N is applied. The ultrasonic welding amplitude is 70 µm, the frequency is 20 kHz, and continuous ultrasonic welding is initiated on one side of the wall panel 2 at a welding speed of 15 mm / s. Pressure and ultrasonic vibration are applied to the bottom and rounded corner area 11 of the T-shaped reinforcing rib 1 between the workpieces, causing the energy-conducting ribs 6 in this area to fuse and form a joint. After welding, the ultrasonic welding head 5 is raised, allowing the workpiece to cool naturally.
[0043] II. The ultrasonic continuous welding process of the left edge strip 12 region of the T-shaped reinforcing rib 1. Please refer to [link / reference]. Figure 4 The wall panel 2 is held in place by hydraulic clamping fixtures 3 on both sides, and the clamping fixtures 3 on the top of the T-shaped reinforcing rib 1 are removed. A long strip-shaped pressure block fixture 4 is applied to the right edge strip 13 area of the T-shaped reinforcing rib 1, with a pressure of 20 MPa, to ensure the fixation and positional accuracy of the right edge strip 13 of the T-shaped reinforcing rib 1 during the welding process. A 20 mm wide ultrasonic welding head 5, the same width as the plane area of the left edge strip 12, is selected. The ultrasonic welding head 5 is lowered to the surface of the left edge strip 12 of the T-shaped reinforcing rib 1 and a welding pressure of 1200 N is applied. The ultrasonic welding amplitude is 70 µm and the frequency is 20 kHz. Continuous ultrasonic welding is started on one side of the left edge strip 12 of the T-shaped reinforcing rib 1 at a welding speed of 15 mm / s. Pressure and ultrasonic vibration are applied to the contact surface between the workpieces, causing the energy-conducting ribs 6 in this area to melt and bond together to form a welded joint. After welding, the ultrasonic welding head 5 is raised to allow the workpiece to cool naturally.
[0044] III. Ultrasonic continuous welding process of the right edge strip 13 region of T-shaped reinforcing rib 1. Please refer to [link / reference]. Figure 5The wall panel 2 is held in place on both sides by hydraulic clamping fixtures 3, and the clamping fixtures 3 on the top of the T-shaped reinforcing rib 1 are removed. A long strip-shaped pressure block fixture 4 is applied to the left edge strip 12 area of the T-shaped reinforcing rib 1, with a pressure of 20 MPa, to ensure the fixation and positional accuracy of the left edge strip 12 of the T-shaped reinforcing rib 1 during the welding process. A 20 mm wide ultrasonic welding head 5, with the same width as the plane area of the right edge strip 13, is selected. The ultrasonic welding head 5 is lowered to the surface of the right edge strip 13 of the T-shaped reinforcing rib 1 and a welding pressure of 1200 N is applied. The ultrasonic welding amplitude is 70 µm, the frequency is 20 kHz, and continuous ultrasonic welding is started on one side of the right edge strip 13 of the T-shaped reinforcing rib 1 at a welding speed of 15 mm / s. Pressure and ultrasonic vibration are applied to the contact surface between the workpieces, causing the energy-conducting ribs 6 in this area to melt and bond together to form a welded joint. After welding, the ultrasonic welding head 5 is raised to allow the workpiece to cool naturally.
[0045] Ultimately, the pull-out strength of the welded joint in this embodiment reached 32.8 MPa, and the percentage of defect area at the weld interface was 3.5%.
[0046] In addition, this embodiment also provides several comparative examples for comparison with this solution, as follows: Comparative Example 1: All the above implementation conditions are the same, but the welding process is not performed on the left and right edge strips 13 of the T-shaped reinforcing rib 1; that is, ultrasonic welding is only performed on the bottom and rounded corner area 11 of the T-shaped reinforcing rib 1 on one side of the wall panel 2. Figure 1 As shown. After the welding process was completed, the joint cooled naturally. The tensile strength of the resulting welded joint was 12.1 MPa, and the percentage of defect area at the weld interface was 27.9%.
[0047] Comparative Example 2: All the above implementation conditions are the same, but the welding process is not performed on the bottom and rounded corner area 11 of the T-shaped reinforcing rib 1. That is, ultrasonic welding is only performed on one side of the surface of the left and right edge strips 12 and 13 of the T-shaped reinforcing rib 1. Figure 2 , 3 As shown. After the welding process was completed, the joint cooled naturally. The tensile strength of the resulting welded joint was 20.8 MPa, and the percentage of defect area at the weld interface was 14.3%.
[0048] Comparative Example 3: Please refer to Figure 6 All the above implementation conditions are the same, but the welding process is not performed on the left and right edge strips 12 and 13 of the T-shaped reinforcing rib 1. That is, ultrasonic welding is only performed on one side of the wall panel 2 at the connection area between the T-shaped reinforcing rib 1 and the wall panel 2. Figure 4 As shown. During the welding process, a 60 mm wide ultrasonic welding head 5, with the same width as the welding area, was used. After the welding process was completed, the joint cooled naturally. The tensile strength of the resulting welded joint was 18.2 MPa, and the percentage of defect area at the weld interface was 16.9%.
[0049] The comparison shows that the pull-out strength of the welded joint obtained in this embodiment is much greater than that of Comparative Examples 1, 2 and 3, and the percentage of defect area at the weld interface is much lower than that of Comparative Examples 1, 2 and 3.
[0050] This invention addresses the problem of high stiffness and difficult vibration transmission of the T-shaped reinforcing rib 1 between the thermoplastic composite material T-shaped rib 1 and the thermoplastic composite material wall panel 2 by setting energy-conducting ribs 6 between the contact surfaces and the T-shaped reinforcing rib 1. Simultaneously, it employs three-pass, zoned welding—at the bottom and rounded corners, left edge strip 12, and right edge strip 13—and applies ultrasonic vibration from the side of the wall panel 2 and the edge strips on both sides of the rib. This ensures uniform frictional heat generation across the entire welding interface, resulting in full fusion and bonding of the bottom rounded corner area 11 of the T-shaped rib and the contact surfaces of the left and right edge strips 12 and 13, eliminating incomplete welding defects and significantly improving the pull-out strength of the wall panel 2. Furthermore, this invention is applicable to both spot welding and continuous welding processes, and can be widely used in the welding of thermoplastic composite material reinforcing rib wall panel 2 workpieces of various sizes and structures. Moreover, this invention can be adjusted according to different thermoplastic composite material matrices (such as PEEK, PEKK, PPS, PA, etc.) to adapt to the welding requirements of different materials.
[0051] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the scope of the present invention are still within the scope of the present invention.
Claims
1. An ultrasonic welding method for a thermoplastic composite T-shaped stiffened wall panel, characterized in that, Includes the following steps: Step 1: Abut and position the thermoplastic composite T-shaped reinforcing ribs against the thermoplastic composite wall panel; Step 2: Provide energy-conducting ribs between the contact surfaces of the thermoplastic composite T-shaped reinforcing ribs and the thermoplastic composite wall panel; Step 3: On one side of the thermoplastic composite wall panel, ultrasonic welding is performed on the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib. Step 4: On one side of the thermoplastic composite T-shaped reinforcing rib, perform ultrasonic welding on one edge strip area of the thermoplastic composite T-shaped reinforcing rib. Step 5: On one side of the thermoplastic composite T-shaped reinforcing rib, ultrasonic welding is performed on the other edge strip area of the thermoplastic composite T-shaped reinforcing rib.
2. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 1, characterized in that: In step one, an infrared positioning system is used to position the thermoplastic composite T-shaped reinforcing ribs and the thermoplastic composite wall panels.
3. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 1, characterized in that: The thermoplastic composite material is a carbon fiber reinforced PEEK, PEKK, PPS or PA matrix composite material; the energy-conducting rib is the corresponding matrix resin film with a thickness of 100μm to 300μm.
4. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 1, characterized in that: According to the predetermined position, a hydraulic clamping fixture is used to fix the end of the thermoplastic composite material T-shaped reinforcing rib away from the thermoplastic composite material wall panel and the opposite ends of the thermoplastic composite material wall panel.
5. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 1, characterized in that, Step three includes the following steps: Select an ultrasonic welding head with the same width as the bottom and rounded corner area of the thermoplastic composite T-shaped reinforcing rib; Ultrasonic welding is initiated, pressure is applied to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and ultrasonic vibration is applied to the contact surface of the bottom and rounded corner areas of the thermoplastic composite T-shaped reinforcing rib to melt and bond the corresponding positions of the energy-conducting rib to form a welded joint. Allow the welded workpiece to cool naturally.
6. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 1, characterized in that, Step four includes the following steps: Select an ultrasonic welding head with the same width as one of the edge strip regions of the thermoplastic composite T-shaped reinforcing rib; Initiate ultrasonic welding, apply pressure to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and perform ultrasonic vibration on the contact surface of one of the edge strip areas of the thermoplastic composite T-shaped reinforcing rib, so that the corresponding position of the energy-conducting rib melts and combines to form a welded joint. Allow the welded workpiece to cool naturally.
7. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 6, characterized in that, The following steps are also included before welding: Remove the fixing at the end of the thermoplastic composite T-shaped reinforcing rib that is away from the thermoplastic composite wall panel; Apply a pressure block tool to the other edge strip area of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
8. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 7, characterized in that, Step five includes the following steps: Select an ultrasonic welding head that is the same width as the other edge strip region of the thermoplastic composite T-shaped reinforcing rib; Ultrasonic welding is initiated, pressure is applied to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel, and ultrasonic vibration is applied to the contact surface of the other edge strip area of the thermoplastic composite T-shaped reinforcing rib, so that the corresponding positions of the energy-conducting rib are fused together to form a welded joint. Allow the welded workpiece to cool naturally.
9. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to claim 8, characterized in that, Before welding, the following steps are also included: applying a pressure block tool to one of the edge strip areas of the thermoplastic composite T-shaped reinforcing rib to ensure the fixation and positional accuracy of the edge strip area during the welding process.
10. The ultrasonic welding method for the thermoplastic composite T-shaped stiffened wall panel according to any one of claims 5-8, characterized in that: The pressure applied to the contact surface between the thermoplastic composite T-shaped reinforcing rib and the thermoplastic composite wall panel is 10-30 MPa; the ultrasonic frequency is 10-30 kHz; and the welding speed is 10-20 mm / s.