A device cabin end plate and welding process thereof

Abstract

The application discloses a device cabin end plate and a welding process thereof. The device cabin end plate comprises a carbon fiber composite material plate and an aluminum alloy reinforcing rib. The aluminum alloy reinforcing rib is provided with a lap joint on each side, which is in contact with the upper surface of the carbon fiber composite material plate. The lap joint is welded to the preset position of the carbon fiber composite material plate through a laser welding head. The welding process comprises the following steps: placing the carbon fiber composite material plate on a welding platform and pressing it through a first pressing assembly; placing the aluminum alloy reinforcing rib on the carbon fiber composite material plate and pressing it through a second pressing assembly; and starting a laser welding device to make the laser welding head weld along the weld joint of the aluminum alloy reinforcing rib and the carbon fiber composite material plate. By welding the aluminum alloy reinforcing rib on the carbon fiber composite material plate, the light weight can be realized under the premise of ensuring the rigidity of the device cabin end plate.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and in particular to an equipment compartment end plate and its welding process. Background Technology

[0002] The equipment compartment of a high-speed train is a crucial component under the train, primarily responsible for protecting the equipment and reducing aerodynamic drag. Due to the complex and diverse operating routes of high-speed trains and the harsh and variable environment under the train, the equipment compartment must possess superior structural characteristics to meet the strength requirements during high-speed operation and ensure the normal functioning of the equipment. The equipment compartment is a box-shaped structure, mainly composed of a floor plate, skirts, supports, and end plates.

[0003] The equipment compartment end plates, located in the front and rear areas of the bogie, effectively prevent ballast from splashing during high-speed train operation, avoid damage from flying stones carried by the vehicle, and improve the flow field and noise environment in the bogie area. They serve as a primary barrier for protecting undercarriage equipment. The end plates typically employ a one-piece molded structure to ensure high strength. Increased vehicle speed leads to increased running resistance and noise; therefore, the equipment compartment end plates play a crucial role in ensuring overall vehicle structural smoothness and achieving drag and noise reduction.

[0004] The existing equipment compartment end plates are made of metal sheets, usually stainless steel or aluminum alloy. The forming process uses stamping, and the reinforcing ribs are formed by stamping. However, the material in the stamping deformation area may be overstretched, which may cause defects, resulting in cracks or even damage to the end plate under load.

[0005] Therefore, how to reduce the weight of the equipment compartment end plate while meeting structural performance requirements is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an equipment compartment end plate and its welding process, which can achieve lightweighting while meeting structural performance requirements.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An equipment compartment end plate includes: a carbon fiber composite plate and an aluminum alloy reinforcing rib. The aluminum alloy reinforcing rib has overlapping joints on both sides that contact the upper surface of the carbon fiber composite plate. The overlapping joints are welded to a predetermined position on the carbon fiber composite plate by a laser welding head.

[0009] Preferably, the upper surface of the carbon fiber composite plate is welded with a plurality of aluminum alloy reinforcing ribs, which are parallel to each other and distributed at equal intervals on the carbon fiber composite plate.

[0010] Preferably, the carbon fiber composite plate is a rectangular plate, each of the aluminum alloy reinforcing ribs is a long strip, and the length extension direction of each aluminum alloy reinforcing rib is perpendicular to the long side of the carbon fiber composite plate. A first connecting hole is provided on the wide side of the carbon fiber composite plate, and a plurality of equally spaced second connecting holes are provided on the long side of the carbon fiber composite plate. Both the first connecting hole and the second connecting hole are perpendicular to the carbon fiber composite plate.

[0011] Preferably, the aluminum alloy reinforcing rib is a hat-shaped beam structure, which includes a U-shaped beam with a U-shaped cross-section and a first connecting edge and a second connecting edge integrally formed on both sides of the U-shaped beam. The first connecting edge and the second connecting edge are both parallel to the upper surface of the carbon fiber composite plate and are welded to the carbon fiber composite plate.

[0012] Preferably, two aluminum alloy reinforcing ribs are welded to the upper surface of the carbon fiber composite plate, and the two aluminum alloy reinforcing ribs are perpendicular to each other and distributed in a cross shape on the carbon fiber composite plate.

[0013] Preferably, the upper surface of the carbon fiber composite plate is welded with a plurality of aluminum alloy reinforcing ribs, wherein the plurality of aluminum alloy reinforcing ribs are parallel to each other and equally spaced on the carbon fiber composite plate, and the remaining plurality of aluminum alloy reinforcing ribs are distributed on both sides of the upper surface of the carbon fiber composite plate, wherein the two aluminum alloy reinforcing ribs on both sides are respectively distributed in a figure-eight shape, and the spacing between the two aluminum alloy reinforcing ribs gradually increases from the middle to the side of the carbon fiber composite plate.

[0014] Preferably, the carbon fiber composite plate includes a unidirectional carbon fiber prepreg tape layup in the core and short carbon fiber composite layers on both sides.

[0015] Preferably, the overlapping joint has a surface reinforcement layer on the side facing the carbon fiber composite plate, and the surface reinforcement layer is a mesh-like microtextured reinforcement layer.

[0016] A welding process for equipment compartment end plates includes:

[0017] Step 1: Place the carbon fiber composite plate on the welding platform and press it with the first clamping assembly, and apply a downward bending pre-deformation to both ends of the carbon fiber composite plate;

[0018] Step 2: Place the aluminum alloy reinforcing ribs on the carbon fiber composite plate and press them together with the second clamping assembly, and apply a pre-deformation to the aluminum alloy reinforcing ribs that is adapted to the carbon fiber composite plate;

[0019] Step 3: Start the laser welding device and make the laser welding head weld along the weld seam of the aluminum alloy reinforcing rib and the carbon fiber composite plate;

[0020] Step 4: After welding is completed, the aluminum alloy reinforcing rib is subjected to constant pressure by the second clamping component and maintained for a preset time.

[0021] Preferably, before step 1, the surface of the carbon fiber composite plate is cleaned, and the surface to be welded of the aluminum alloy reinforcing rib is cleaned and surface-strengthened.

[0022] Compared with existing technologies, the above technical solution has the following advantages:

[0023] The present invention provides an equipment compartment end plate, comprising: a carbon fiber composite plate and an aluminum alloy reinforcing rib. The aluminum alloy reinforcing rib has overlapping joints on both sides that contact the upper surface of the carbon fiber composite plate. These overlapping joints are welded to predetermined positions on the carbon fiber composite plate using a laser welding head. By welding the aluminum alloy reinforcing ribs onto the carbon fiber composite plate, weight reduction can be achieved while maintaining the rigidity of the equipment compartment end plate.

[0024] The present invention provides a welding process for an equipment compartment end plate, comprising the following steps: placing a carbon fiber composite plate on a welding platform and clamping it with a first clamping component; placing an aluminum alloy reinforcing rib on the carbon fiber composite plate and clamping it with a second clamping component; activating a laser welding device to weld the laser welding head along the weld seam between the aluminum alloy reinforcing rib and the carbon fiber composite plate; after welding, applying a constant pressure to the aluminum alloy reinforcing rib using the second clamping component and maintaining it for a preset time. By clamping the carbon fiber composite plate and the aluminum alloy reinforcing rib, the stability during welding can be effectively improved, and the deformation of the equipment compartment end plate during welding can be reduced. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of a pre-deformation structure of an equipment compartment end plate provided in a specific embodiment of the present invention;

[0027] Figure 2 A three-dimensional structural schematic diagram of an equipment compartment end plate provided for another specific embodiment of the present invention;

[0028] Figure 3 for Figure 2 Top view;

[0029] Figure 4 A three-dimensional structural schematic diagram of an equipment compartment end plate provided for another specific embodiment of the present invention;

[0030] Figure 5 for Figure 4 Top view;

[0031] Figure 6 A three-dimensional structural schematic diagram of an equipment compartment end plate provided for another specific embodiment of the present invention;

[0032] Figure 7 for Figure 6 Top view;

[0033] Figure 8 A schematic diagram of the tooling platform for an equipment compartment end plate provided in a specific embodiment of the present invention;

[0034] Figure 9 This is a schematic flowchart illustrating a welding process for an equipment compartment end plate according to a specific embodiment of the present invention.

[0035] The attached figures are labeled as follows:

[0036] 100 is the equipment compartment end plate, 101 is a carbon fiber composite plate, 1011 is the first connecting hole, 1012 is the second connecting hole, 102 is an aluminum alloy reinforcing rib, 1021 is a U-shaped beam, 1022 is the first connecting edge, and 1023 is the second connecting edge.

[0037] 10 is the base plate;

[0038] 20 is the first clamping component, 21 is the clamping block, 211 is the oblong hole, 22 is the threaded adjustment component, and 23 is the pressure strip;

[0039] 30 is the second clamping component, 31 is the pressure head, 32 is the fixed column, and 33 is the lifting drive component;

[0040] 40 represents the welding equipment;

[0041] 50 is a pressure sensor. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please refer to Figure 1 The equipment compartment end plate 100 provided in this embodiment of the invention includes: a carbon fiber composite plate 101 and an aluminum alloy reinforcing rib 102. The aluminum alloy reinforcing rib 102 has overlapping joints on both sides that contact the upper surface of the carbon fiber composite plate 101. These overlapping joints are welded to predetermined positions on the carbon fiber composite plate 101 using a laser welding head. These predetermined positions are the weakest points of the carbon fiber composite plate 101. The weakest points vary depending on the size of the carbon fiber composite plate 101, meaning the welding positions of the aluminum alloy reinforcing rib 102 also vary. The specific welding positions of the aluminum alloy reinforcing rib 102 need to be determined in advance based on the actual carbon fiber composite plate 101. By welding the aluminum alloy reinforcing rib 102 onto the carbon fiber composite plate 101, weight reduction can be achieved while maintaining the rigidity of the equipment compartment end plate 100.

[0044] Regarding the structure of the carbon fiber composite plate 101, in a specific embodiment, a sandwich structure is preferred. The overall thickness of the plate is 4mm. The core is a unidirectional carbon fiber prepreg tape layup, and both sides are short carbon fiber composite layers. The unidirectional carbon fiber prepreg tape layup is located between the two short carbon fiber composite layers. The overall resin content of the composite material is 40%. For example, carbon fiber grades include T300, T700, T800, M40, M60, etc.; the layup angle of the carbon fiber prepreg can be 0°, 45°, 90°, etc.; or the fibers can be woven; the resin content can vary (e.g., 20%~70%), and the type of resin can be a certain variety of thermoplastic resin (e.g., PA6, PA66, PEEK, PPS, etc.); common long fiber or short fiber reinforced composite material plates (i.e., non-sandwich structure) can also be used as long as the resin content is appropriate and the plate flatness meets the standards. In addition, other resin-based composite materials with reinforcing fibers (e.g., glass fiber, basalt fiber, high-density polyethylene fiber, etc.) can also be selected.

[0045] Regarding the structure of the aluminum alloy reinforcing rib 102, in a specific embodiment, such as Figure 2 and Figure 3As shown, the aluminum alloy reinforcing rib 102 is preferably a cap-shaped beam structure. For example, it can be made of aluminum alloys of grades such as 6063, 6082, 5083, 2011, and 7075. Specifically, it can be made of aluminum alloy profiles, including solid profiles, semi-hollow profiles, and hollow profiles. Solid profiles are generally angular, channel, or I-beams, and the cap-shaped beam selected in this invention is also a solid profile. Even the cross-sectional dimensions of the cap-shaped beam can be different. In addition, a long strip of aluminum alloy can be cut according to the dimensions of the carbon fiber composite plate 101 and welded together, which can also achieve a certain structural reinforcement effect. For the aluminum alloy reinforcing 102 rib of the hat-shaped beam structure, it specifically includes a U-shaped beam 1021 with a U-shaped cross-section and a first connecting edge 1022 and a second connecting edge 1023 integrally formed on both sides of the U-shaped beam 1021. That is, the U-shaped beam 1021 and the first connecting edge 1022 and the second connecting edge 1023 are an integral structure. Before welding, the groove of the U-shaped beam 1021 corresponds to the upper surface of the carbon fiber composite plate 101, and the first connecting edge 1022 and the second connecting edge 1023 are parallel to the upper surface of the carbon fiber composite plate 101 and welded to the carbon fiber composite plate 101. Since the first connecting edge 1022 and the second connecting edge 1023 can increase the contact area between the aluminum alloy reinforcing rib 102 and the carbon fiber composite plate 101, it is beneficial to improve the welding stability of the two. The U-shaped beam 1021 can be hollow or solid.

[0046] In some embodiments, multiple aluminum alloy reinforcing ribs 102 are welded to the upper surface of the carbon fiber composite plate 101. The number of aluminum alloy reinforcing ribs 102 can be selected according to the size of the carbon fiber composite plate 101; the larger the size, the more aluminum alloy reinforcing ribs 102 are required. The multiple aluminum alloy reinforcing ribs 102 are parallel to each other and evenly spaced on the carbon fiber composite plate 101. It should be noted that the evenly spaced parallel distribution of the aluminum alloy reinforcing ribs 102 is only a preferred arrangement; the welding positions of the aluminum alloy reinforcing ribs 102 can also be determined according to actual needs, as long as they effectively reinforce the carbon fiber composite plate 101.

[0047] In some embodiments, such as Figure 3As shown, the carbon fiber composite plate 101 is a rectangular plate, and each aluminum alloy reinforcing rib 102 is a long strip. The length extension direction of each aluminum alloy reinforcing rib 102 is perpendicular to the long side of the carbon fiber composite plate 101. A first connecting hole 1011 is provided at the wide side of the carbon fiber composite plate. For example, a first connecting hole 1011 can be provided at the middle of the wide side of the carbon fiber composite plate. A plurality of equally spaced second connecting holes 1012 are provided at the long side of the carbon fiber composite plate. For example, three second connecting holes 1012 can be provided at the long side of the carbon fiber composite plate. The first connecting hole 1011 and the second connecting hole 1012 are both perpendicular to the carbon fiber composite plate 101. The carbon fiber composite plate 101 can be fixed to the equipment compartment by fasteners such as rivets or screws passing through the first connecting holes 1011 and the second connecting holes 1012.

[0048] In some embodiments, such as Figure 4 and Figure 5 As shown, two aluminum alloy reinforcing ribs 102 are welded to the upper surface of the carbon fiber composite plate 101. The two aluminum alloy reinforcing ribs 102 are perpendicular to each other and distributed in a cross shape on the carbon fiber composite plate 101. For example, the carbon fiber composite plate 101 can be a rectangular plate. The first aluminum alloy reinforcing rib 102 is perpendicular to the long side of the carbon fiber composite plate 101, and the second aluminum alloy reinforcing rib 102 is perpendicular to the wide side of the carbon fiber composite plate 101. This aluminum alloy reinforcing rib 102 can be a two-segment structure, with the two segments located on both sides of the first aluminum alloy reinforcing rib 102. Of course, the first aluminum alloy reinforcing rib 102 can also be a two-segment structure. By distributing the two aluminum alloy reinforcing ribs 102 in a cross shape, it is beneficial to improve the strength of the carbon fiber composite plate 101 in two mutually perpendicular directions. In addition, less material is used, which helps to reduce the weight of the equipment compartment end plate.

[0049] In some embodiments, such as Figure 6 and Figure 7 As shown, the upper surface of the carbon fiber composite plate 101 is welded with multiple aluminum alloy reinforcing ribs 102. These ribs are divided into two parts. One part has multiple aluminum alloy reinforcing ribs 102 that are parallel to each other and evenly spaced on the carbon fiber composite plate 101. The remaining multiple aluminum alloy reinforcing ribs 102 form the other part, which are distributed on both sides of the upper surface of the carbon fiber composite plate 101. The two aluminum alloy reinforcing ribs on each side are arranged in a figure-eight shape, and the spacing between the two aluminum alloy reinforcing ribs gradually increases from the middle to the side of the carbon fiber composite plate 101. Specifically... Figure 6 and Figure 7As shown, seven aluminum alloy reinforcing ribs 102 are welded to the upper surface of the carbon fiber composite plate 101. Three of these ribs are parallel to each other and evenly spaced in the middle of the upper surface of the carbon fiber composite plate 101, and these three ribs are perpendicular to the long side of the carbon fiber composite plate 101. The other four ribs are located on both sides of the upper surface of the carbon fiber composite plate 101, and the extension direction of the four ribs on both sides is along the midline of the four corners of the carbon fiber composite plate 101. This distribution of the aluminum alloy reinforcing ribs 102 effectively improves the strength of the middle and sides of the carbon fiber composite plate 101, thereby increasing its service life.

[0050] In some embodiments, before welding the aluminum alloy reinforcing rib 102 and the carbon fiber composite plate 101, the surface of the aluminum alloy reinforcing rib 102 is cleaned and pretreated, and the surface of the carbon fiber composite plate 101 is cleaned, for example by wiping with ethanol to remove dust and organic matter adhering to the surface. A surface strengthening layer is provided on the side of the lap joint facing the carbon fiber composite plate 101, which improves the welding strength of the aluminum alloy reinforcing rib 102 and the carbon fiber composite plate 101. The surface strengthening layer is a mesh-like microtextured strengthening layer, which can be formed by laser microtexturing, and can be selected from mesh-like microtexturing, partially filled microtexturing, or fully filled microtexturing.

[0051] like Figure 9 As shown, this embodiment of the invention also provides a welding process for the equipment compartment end plate 100, including the following steps:

[0052] Step 1: Place the carbon fiber composite plate 101 on the welding platform and clamp it using the first clamping assembly 20. (Please refer to...) Figure 8The welding platform includes a base plate 10, a first clamping assembly 20, a second clamping assembly 30, and a laser welding device 40. The base plate 10 is used to support the carbon fiber composite plate 101. The first clamping assembly 20 includes a clamping block 21 and a threaded adjustment component 22. One end of the clamping block 21 is a fixed end, and the other end is a clamping end. The fixed end is connected to the base plate 10. A preset gap is provided between the body of the clamping block 21 and the base plate 10. The body of the clamping block 21 is provided with a through hole. The clamping block 21 is an L-shaped clamping block. The vertical plate of the L-shaped clamping block is fixedly connected to the base plate 10. The through hole is provided on the horizontal plate of the L-shaped clamping block. The through hole is an oblong hole 211 extending along the length direction of the horizontal plate. The lower end of the threaded adjusting member 22 passes through the through hole and is connected to the base plate 10. The clamping end is used to press against the plate when the threaded adjusting member 22 is screwed down. When the threaded adjusting member 22 is screwed down, the clamping end of the clamping block 21 will move downward, so that the clamping end can press against the plate. The lower end of the clamping end is provided with a pressure strip 23. The length extension direction of the pressure strip 23 is perpendicular to the reinforcing rib. Multiple reinforcing ribs can be clamped by the pressure strip 23.

[0053] Step 2: Place the aluminum alloy reinforcing rib 102 on the carbon fiber composite plate 101 and press it down using the second pressing assembly 30. The second pressing assembly 30 includes a pressing head 31, two fixed posts 32, and two lifting drive components 33. The two sides of the pressing head 31 are vertically connected to the two fixed posts 32, which primarily guide the pressing head 31. The lower ends of the fixed posts 32 are connected to the base plate 10. The two lifting drive components 33 are connected above both ends of the pressing head 31. When the reinforcing rib needs to be pressed down, the two lifting drive components 33 drive the pressing head 31 to descend. After welding is completed, or after welding is completed and held for a period of time, the lifting drive components 33 drive the pressing head 31 to rise to release the reinforcing rib. The lifting drive component 33 is preferably an electric push rod; however, pneumatic or hydraulic push rods can also be used, as long as they can achieve the lifting and lowering of the pressing head 31.

[0054] Step 3: Start the laser welding device 40, causing the laser welding head to weld along the weld seam between the aluminum alloy reinforcing rib 102 and the carbon fiber composite plate 101. The welding head of the laser welding device 40 is mounted on the end effector of the robot. The position and angle of the welding head can be adjusted by the robot, and the welding head is automatically controlled to weld along a preset trajectory by a pre-stored control program within the robot. The process parameters of the laser welding device 40 are: laser power 300~1000W, speed 0.2~0.8m / min, defocusing amount +5~+20mm, pressure 50~600N. The pressure will be adjusted during the welding process. Since the deformation generated when welding the reinforcing ribs at different locations is different, the pressure of the second clamping component 30 at the corresponding position can be adjusted when welding the reinforcing ribs at different locations. When multiple aluminum alloy reinforcing ribs 102 need to be welded, the order of the aluminum alloy reinforcing ribs 102 can be predetermined. For example, for an equipment compartment end plate 100 with three reinforcing ribs on the plate, the reinforcing ribs are labeled as the first reinforcing rib, the second reinforcing rib, and the third reinforcing rib from left to right. The welding device 40 welds six times in total, and the welding sequence of the six times is as follows: the right side of the first reinforcing rib, the left side of the first reinforcing rib, the right side of the second reinforcing rib, the left side of the second reinforcing rib, the left side of the third reinforcing rib, and the right side of the third reinforcing rib. When welding the six welds, the pressure of the second clamping component 30 is controlled at approximately 100N, 300N, 500N, 300N, 300N, and 300N respectively. The pressure fluctuation during the welding process does not exceed ±5%. This welding sequence can effectively reduce the amount of welding deformation.

[0055] In some embodiments, step 4 is further included: after welding, a constant pressure is applied to the reinforcing rib by the second clamping assembly 30 and maintained for a preset time. Since the equipment compartment end plate 100 will deform under the condition of thermal expansion and contraction after welding, by controlling the second clamping assembly 30 to apply a constant pressure, deformation of the equipment compartment end plate 100 can be avoided, thereby helping to ensure the flatness of the equipment compartment end plate 100. In order to accurately detect the pressure of the pressure head 31, a pressure sensor 50 can be set between the electric push rod and the pressure head 31. The pressure sensor 50 can detect the pressure of the pressure head 31 in real time and send it to the electronic control system. The electronic control system can control the pressure head 31 to apply a constant pressure to the aluminum alloy reinforcing rib 102, thereby reducing the amount of welding deformation after welding.

[0056] In some embodiments, before step 1, the surface of the carbon fiber composite plate 101 is cleaned, for example by wiping with ethanol to remove dust and organic matter adhering to the surface. The surfaces of the aluminum alloy reinforcing ribs 102 to be welded are cleaned and surface-strengthened. Cleaning involves ultrasonically immersing the profile in ethanol to remove surface dust and oil, followed by drying and pretreatment. Here, laser microtexturing is used, with options including mesh microtexturing, partial filling microtexturing, and full filling microtexturing. Mesh microtexturing has the following process parameters: laser power 30~70W, pulse frequency 40~80kHz, mesh spacing 0.1~0.4mm, scanning speed 1000~3000mm / s, and 5~20 scans. Other surface strengthening methods can also be used (e.g., anodizing, micro-arc oxidation, silanization, microtexturing + anodizing, microtexturing + silanization, etc.).

[0057] In some embodiments, in step 1, the first clamping assembly 20 applies a downward bending pre-deformation to both ends of the carbon fiber composite plate 101 to resist the warping deformation generated at both ends of the carbon fiber composite plate 101 during welding. The amount of pre-deformation needs to be pre-set according to the structure of the carbon fiber composite plate 101 and the aluminum alloy reinforcing rib 102. In step 2, the second clamping assembly 30 applies a pre-deformation adapted to the carbon fiber composite plate 101 to the reinforcing rib. During clamping, the electronic control system controls the electric push rod to press the pressure head 31 onto the aluminum alloy reinforcing rib 102. Then, according to the pre-calculated welding deformation amount, the electric push rod is controlled to press down to the position to complete the corresponding pre-deformation, thereby achieving the effect of reducing the deformation amount during the welding process.

[0058] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above provides a detailed description of an equipment compartment end plate and its welding process provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A welding process for the end plate of an equipment compartment, characterized in that, include: Step 1: Place the carbon fiber composite plate on the welding platform and press it with the first clamping assembly, and apply a downward bending pre-deformation to both ends of the carbon fiber composite plate. The first clamping assembly includes a clamping block and a threaded adjustment component. One end of the clamping block is a fixed end and the other end is a clamping end. The clamping end is used to press the carbon fiber composite plate when the threaded adjustment component is screwed downward. The lower end of the clamping end is provided with a pressure strip. Step 2: Place the aluminum alloy reinforcing rib on the carbon fiber composite plate and press it with the second clamping assembly, and apply a pre-deformation to the aluminum alloy reinforcing rib that is adapted to the carbon fiber composite plate. The second clamping assembly includes a pressure head, two fixed columns and two lifting drive components. The two sides of the pressure head are respectively movably connected to the two fixed columns, and the two lifting drive components are respectively connected to the top of the two ends of the pressure head. Step 3: Start the laser welding device and make the laser welding head weld along the weld seam of the aluminum alloy reinforcing rib and the carbon fiber composite plate; Step 4: After welding is completed, the second clamping assembly applies a constant pressure to the aluminum alloy reinforcing rib and maintains it for a preset time. The pressure of the pressure head is detected in real time by a pressure sensor and sent to the electronic control system. The electronic control system controls the pressure head to apply a constant pressure to the aluminum alloy reinforcing rib.

2. The welding process for the equipment compartment end plate according to claim 1, characterized in that, Before step 1, the surface of the carbon fiber composite plate is cleaned, and the surface to be welded of the aluminum alloy reinforcing rib is cleaned and surface-strengthened.

3. An equipment compartment end plate, manufactured using the equipment compartment end plate welding process described in claim 1 or 2, characterized in that, The equipment compartment end plate includes: a carbon fiber composite plate and an aluminum alloy reinforcing rib. The aluminum alloy reinforcing rib has overlapping joints on both sides that contact the upper surface of the carbon fiber composite plate. The overlapping joints are welded to the carbon fiber composite plate at a predetermined position by a laser welding head.

4. The equipment compartment end plate according to claim 3, characterized in that, Multiple aluminum alloy reinforcing ribs are welded to the upper surface of the carbon fiber composite plate, and the multiple aluminum alloy reinforcing ribs are parallel to each other and equally spaced on the carbon fiber composite plate.

5. The equipment compartment end plate according to claim 4, characterized in that, The carbon fiber composite plate is a rectangular plate, and each of the aluminum alloy reinforcing ribs is a long strip. The length extension direction of each aluminum alloy reinforcing rib is perpendicular to the long side of the carbon fiber composite plate. A first connecting hole is provided on the wide side of the carbon fiber composite plate, and a plurality of equally spaced second connecting holes are provided on the long side of the carbon fiber composite plate. Both the first connecting hole and the second connecting hole are perpendicular to the carbon fiber composite plate.

6. The equipment compartment end plate according to claim 3, characterized in that, The aluminum alloy reinforcing rib is a hat-shaped beam structure. The aluminum alloy reinforcing rib includes a U-shaped beam with a U-shaped cross-section and a first connecting edge and a second connecting edge integrally formed on both sides of the U-shaped beam. The first connecting edge and the second connecting edge are both parallel to the upper surface of the carbon fiber composite plate and are welded to the carbon fiber composite plate.

7. The equipment compartment end plate according to claim 3, characterized in that, Two aluminum alloy reinforcing ribs are welded to the upper surface of the carbon fiber composite plate. The two aluminum alloy reinforcing ribs are perpendicular to each other and distributed in a cross shape on the carbon fiber composite plate.

8. The equipment compartment end plate according to claim 3, characterized in that, The upper surface of the carbon fiber composite plate is welded with multiple aluminum alloy reinforcing ribs, wherein the multiple aluminum alloy reinforcing ribs are parallel to each other and equally spaced on the carbon fiber composite plate, and the remaining multiple aluminum alloy reinforcing ribs are distributed on both sides of the upper surface of the carbon fiber composite plate. The two aluminum alloy reinforcing ribs on both sides are arranged in a figure-eight shape, and the distance between the two aluminum alloy reinforcing ribs gradually increases from the middle to the side of the carbon fiber composite plate.

9. The equipment compartment end plate according to claim 3, characterized in that, The carbon fiber composite plate includes a unidirectional carbon fiber prepreg tape layup in the core and short carbon fiber composite layers on both sides.

10. The equipment compartment end plate according to claim 3, characterized in that, The overlapping joint has a surface reinforcement layer on the side facing the carbon fiber composite plate, and the surface reinforcement layer is a mesh-like microtextured reinforcement layer.

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