Machining method of aluminum alloy section amphibious vehicle sliding plate

Abstract

The invention relates to the technical field of aluminum alloy section processing, and discloses a processing method of an aluminum alloy section amphibious vehicle skateboard, which comprises the following steps of: dividing the whole skateboard into two sub-assemblies by adopting an extrusion forming process, designing a splicing structure at the splicing position of the two sub-assemblies, and respectively extruding and forming the two sub-assemblies to obtain a finished product of the amphibious vehicle skateboard. The two sub-assemblies are welded together based on a splicing structure at the splicing position, the splicing structure comprises a groove part, a welding seam part, a base plate part and a ventilation hole channel part, the ventilation hole channel part is arranged below the welding seam part and located on the base plate part, and the base plate part extends from one of the two sub-assemblies; according to the sliding plate machined through the method, thermal deformation during welding is avoided, the cambered surface precision is higher, one-face welding and two-face forming are achieved in the welding link, the machining process is simple, and cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy profile processing, and in particular to a method for processing an amphibious vehicle skateboard made of an aluminum alloy profile. Background Art

[0002] Amphibious vehicles are designed to provide unique amphibious landing capabilities and rapid floating capabilities on water. These vehicles are usually equipped with a skateboard structure to provide the vehicle with a certain amount of buoyancy and reduce the resistance of sailing on the water, thereby increasing the vehicle's speed and efficiency on the water.

[0003] like Figure 1 As shown in the figure, the skateboard used in a certain amphibious vehicle has an overall hollow structure, a teardrop-shaped cross-section, and a number of reinforcing ribs in the inner cavity. The existing technical solution for processing amphibious vehicle skateboards is basically to use a press-bending machine to press the aluminum alloy sheet into shape and then weld it as a whole. This method not only requires the production of the press-bending mold in sections, but also has many requirements for the preliminary treatment of the press-bending material and the placement on the mold. In addition, the sheet forming is difficult, the deformation is difficult to control, the forming mold is inconvenient to adjust, the efficiency is low, and it takes time. The formed blank is prone to deformation during the subsequent processing to the required size. In order to avoid deformation, subsequent processing and storage must be placed on tooling that meets the shape, which is inconvenient to store. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for processing an amphibious vehicle skateboard made of aluminum alloy profiles.

[0005] The specific technical solution of the present invention to solve the above technical problems is: An extrusion molding process is adopted to divide the whole skateboard into two sub-assemblies, and a splicing structure is designed at the splicing position of the two sub-assemblies. After the two sub-assemblies are extruded and formed respectively, the two are welded together based on the splicing structure at the splicing position. The splicing structure includes a groove portion, a weld portion, a pad portion and a ventilation channel portion. The ventilation channel portion is arranged below the weld portion and on the pad portion. The pad portion extends from one of the two sub-assemblies.

[0006] Compared with the prior art, the present invention has the following beneficial technical effects: since the shape of the skateboard itself includes several irregular curved surfaces, the skateboard arc surface obtained by extrusion molding technology has higher precision than that of press-bending molding, and the places that need to be welded are greatly reduced, which greatly reduces the range of the heat-affected zone during welding and improves product quality. At the same time, since the position to be welded is the docking position of the two plates, during the welding process, the welded position is softened by the high temperature and is prone to collapse. In addition, in order to avoid oxidation at the weld, it is generally necessary to provide inert gas to both sides of the weld for protection. For the welding of ordinary plates, since there is sufficient space on the back of the plate weld, tooling is generally used to provide support for the back of the weld to avoid collapse of the plate at the weld. Since there is sufficient space, it is also very easy to provide inert gas. However, for the extruded skateboard assembly, since the back of the weld is located in the mold cavity of the assembly and the extended dimension of the skateboard is long, The internal space is small and there is no suitable workpiece to provide support and a channel for the inert gas. The present invention directly reserves ventilation holes on the assembled structure and arranges them on the back of the weld. Inert gas can be introduced from one end, so that the back of the entire weld is completely within the protection range of the inert gas to avoid oxidation of the weld. At the same time, the ventilation holes are arranged on the pad part, and the pad part extends from the subassembly. The connection between the pad part and the subassembly is at a certain distance from the weld, so it is less affected by the high temperature at the weld and can maintain sufficient strength during the welding process, thereby forming a back support force for the plate at the weld to avoid collapse at the weld.

[0007] Furthermore, from the perspective of cross section, the weld is located in the middle of the ventilation hole, that is, the side wall of the ventilation hole is far away from the weld.

[0008] The beneficial effect of adopting the above further solution is to prevent the side wall of the ventilation duct from being affected by the temperature of the weld.

[0009] Furthermore, a subassembly without a pad portion is provided with a lifting portion at a position adapted to the pad portion, and the lifting portion lifts an end portion of the pad portion.

[0010] The beneficial effect of adopting the above further solution is that the lifting part prevents the pad part from forming a cantilever beam, thereby further improving the stability of the lifting force provided by it for the weld.

[0011] Furthermore, the depth of the ventilation channel is less than 2 mm.

[0012] The beneficial effect of adopting the above further scheme is that this size can ensure the flow of inert gas while allowing the back of the weld to be fully supported, thereby forming a regular weld on the back side in the ventilation duct under the constraint of the ventilation duct, thereby achieving the effect of single-sided welding and double-sided forming.

[0013] Furthermore, heat dissipation ribs are provided on the back side of the pad portion.

[0014] The beneficial effect of adopting the above further solution is that the pad itself can dissipate heat faster, avoiding softening due to the influence of weld droplets and weakening the supporting force.

[0015] Furthermore, the subassembly includes a curved surface surrounding a cavity and a support plate provided at an end of the curved surface, and the support plate is within 15 mm from the weld.

[0016] The beneficial effect of adopting the above further solution is to reduce the cantilever effect of the welding part and further reduce the deformation during welding.

[0017] Furthermore, the subassembly also includes at least one reinforcing rib plate inside to further increase the overall strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the aluminum alloy profile amphibious vehicle skateboard of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the aluminum alloy profile amphibious vehicle skateboard of the present invention; Figure 3 This is a schematic structural diagram of the first subassembly of the aluminum alloy profile amphibious vehicle skateboard of the present invention; Figure 4 This is a schematic structural diagram of the second subassembly of the aluminum alloy profile amphibious vehicle skateboard of the present invention; Figure 5 It is a schematic diagram of the splicing structure details in Example 1; Figure 6 It is a schematic diagram of the splicing structure details in Example 2; Numbers in the attached drawings: 1. Closing plate; 2. First mounting seat; 3. Wing plate; 4. Second mounting seat; 5. Slide plate; 6. First subassembly; 7. Second subassembly; 8. Splicing structure; 81. Bevel portion; 82. Weld portion; 83. Pad portion; 84. Ventilation channel portion; 85. Lifting portion; 86. Heat dissipation ribs; 9. Curved surface; 10. Support plate; 11. Reinforcement rib plate. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] like Figure 1As shown, this is a schematic diagram of the overall structure of the amphibious vehicle skateboard 5 that needs to be processed. The design includes five key parts: a sealing plate 1, a first mounting seat 2, a wing plate 3, a second mounting seat 4 and a skateboard 5. These components each have different functions, among which the sealing plates 1 on both sides are mainly used to ensure the sealing of the overall structure; the first mounting seat 2 and the second mounting seat 4 are used to achieve a stable connection between the skateboard 5 and the frame; the wing plate 3 not only plays a connecting role, but also provides necessary support; and the skateboard 5 and the wing plate 3 are combined together by welding technology, which can provide buoyancy and effectively reduce water resistance when the vehicle is driving in the water.

[0021] In Example 1, the present invention introduces a method for processing the above-mentioned slide plate 5. This method adopts an extrusion molding process and divides the entire slide plate 5 structure into two sub-assemblies, namely Figure 3 The first subassembly 6 shown and Figure 4 The second subassembly 7 shown, please refer to Figure 2 In terms of design, a splicing structure 8 is set at the splicing position of the two sub-assemblies, so that the two can complete the extrusion molding process separately and then be accurately welded according to the designed splicing structure 8. Figure 5 As shown, the splicing structure 8 specifically includes the details of the groove portion 81, the weld portion 82, the pad portion 83 and the ventilation channel portion 84. It is worth noting that the ventilation channel portion 84 is arranged below the weld portion 82 and is located on the pad portion 83, and the pad portion 83 extends from one of the sub-assemblies, in this case, it extends from the second sub-assembly 7, and it is obvious that it can also extend from the first sub-assembly 6. From the cross-section, the weld is located above the ventilation channel. This design ensures that the inert gas in the ventilation channel can well protect the molten metal at the back weld from oxidation, which helps to ensure that the weld is away from the heat-affected zone, thereby improving the welding quality. In addition, each sub-assembly is composed of a curved surface 9 surrounding a cavity and a support plate 10 arranged at the end of the curved surface 9. The support plate 10 is located about 10 mm away from the weld, and at least one reinforcing rib plate 11 is also provided inside the cavity to enhance the overall structural strength.

[0022] Furthermore, in Example 2, the design of Example 1 is improved. In particular, heat dissipation ribs 86 are added to the back of the pad portion 83, which can not only speed up the heat dissipation of the pad itself, but also avoid the softening problem caused by weld droplets, thereby ensuring that its supporting capacity is not affected. At the same time, for sub-assemblies without pad portions 83, such as Figure 6The first subassembly 6 shown has a lifting portion 85 at the position where it matches the pad portion 83, which is used to lift the end of the pad portion 83, thereby enhancing the stability and accuracy during the assembly process. At the same time, the position of the ventilation duct is also adjusted so that the weld is closer to the middle position of the ventilation duct and the pad portion 83 is away from the molten weld position, ensuring that the pad portion 83 will not be softened by heat during the welding process. This series of design optimizations is intended to improve the accuracy of the processing of the amphibious vehicle skateboard 5 and simplify the processing process.

[0023] Furthermore, the side wall of the ventilation duct near the free end of the pad portion 83 is vertical, so as to constrain the inert gas flowing therein to flow more upward and toward the weld position, thereby avoiding leakage from the gap between the pad portion 83 and the first subassembly 6 .

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing an amphibious vehicle skateboard made of an aluminum alloy profile, characterized in that: An extrusion molding process is adopted to divide an integral skateboard (5) into two sub-assemblies, a splicing structure (8) is designed at the splicing position of the two sub-assemblies, and the two sub-assemblies are respectively extruded and formed, and then the two are welded together based on the splicing structure (8) at the splicing position, wherein the splicing structure (8) comprises a groove portion (81), a weld portion (82), a pad portion (83) and a ventilation channel portion (84), wherein the ventilation channel portion (84) is arranged below the weld portion (82) and located on the pad portion (83), and the pad portion (83) extends from one of the two sub-assemblies.

2. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to claim 1, characterized in that: From the cross-section, the weld is located in the middle of the ventilation duct.

3. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to claim 2, characterized in that: A subassembly not provided with a pad portion (83) is provided with a lifting portion (85) at a position adapted to the pad portion (83), wherein the lifting portion (85) lifts an end portion of the pad portion (83).

4. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to any one of claims 1 to 3, characterized in that: The depth of the ventilation channel is less than 2 mm.

5. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to any one of claims 1 to 3, characterized in that: The back side of the pad portion (83) is provided with heat dissipation ribs (86).

6. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to claim 5, characterized in that: The subassembly comprises a curved surface (9) surrounding a cavity and a support plate (10) arranged at the end of the curved surface (9), wherein the support plate (10) is within 15 mm of the weld.

7. The method for processing an amphibious vehicle skateboard made of an aluminum alloy profile according to any one of claims 1 to 3, characterized in that: The subassembly also includes at least one reinforcing rib plate (11) inside.

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