A curved ribbed skin flattening die and method

Abstract

The application provides a curved surface ribbed skin flattening die and method, the flattening die comprises an upper die set and a lower die set; the upper die set comprises an upper die base and a first upper die, the upper die base is connected to an upper platform of a press, the first upper die is fixed below the upper die base, the lower die set comprises a lower die base and a first lower die, the lower die base is connected to a lower platform of the press, the first lower die is fixed above the lower die base, the working surface of the first upper / lower die is a curved surface, which is consistent with the concave-convex direction of the lower surface of the curved surface ribbed skin, and the curved surface radius is not less than the curved surface radius of the curved surface ribbed skin; the curved surface ribbed skin is placed between the first upper / lower die, and the upper platform of the press drives the upper die set to reciprocate, so that the curved surface of the curved surface ribbed skin is flattened. The flattening die structure is designed according to the structural characteristics of the curved surface ribbed skin, the upper / lower die matched on the upper / lower die base can be replaced, the upper die and the lower die can be adjusted up and down, and the curved surface ribbed skin can be efficiently and flexibly flattened.

Description

Technical Field

[0001] This invention belongs to the field of curved surface skin flattening technology, and specifically relates to a curved surface skin flattening mold and method with ribs. Background Technology

[0002] In existing technologies, the flattening of curved ribbed skins typically relies on manual operation or simple mechanical devices. These methods are inefficient and make it difficult to guarantee the flattening quality of the skin. To improve production efficiency and product quality, it is necessary to develop a new type of flattening mold for curved ribbed skins and a corresponding forming method. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the inventors have conducted intensive research and provided a mold and method for flattening curved ribbed skin, which improves the flattening efficiency and flattening quality of curved ribbed skin.

[0004] The technical solution provided by this invention is as follows:

[0005] Firstly, a curved surface ribbed skin flattening mold includes an upper mold assembly and a lower mold assembly;

[0006] The upper module includes an upper mold base and a first upper mold. The upper mold base is connected to the upper platform of the press, and the first upper mold is fixed below the upper mold base. The working surface is an arc surface, which is consistent with the concave and convex direction of the upper surface of the curved ribbed skin.

[0007] The lower mold assembly includes a lower mold base and a first lower mold. The lower mold base is connected to the lower platform of the press, and the first lower mold is fixed above the lower mold base. The working surface is an arc surface, which is consistent with the concave and convex direction of the lower surface of the curved ribbed skin.

[0008] A curved, ribbed skin is placed between the first upper die and the first lower die. The radii of the curved surfaces of the first upper die and the first lower die are not less than the radii of the curved surface of the ribbed skin. The upper platform of the press drives the upper die assembly to reciprocate, flattening the curved surface of the ribbed skin.

[0009] In conjunction with the first aspect, the first upper mold and the upper mold base are assembled through a concave groove and a protruding structure, and fastened by a threaded connector; the first lower mold and the lower mold base are assembled through a concave groove and a protruding structure, and fastened by a threaded connector.

[0010] In conjunction with the first aspect, the radius of curvature of the working surface of the first upper mold is not less than 800 mm; the radius of curvature of the working surface of the first lower mold is not less than 800 mm.

[0011] In conjunction with the first aspect, the upper module also includes a second upper mold, the working surface of which is a plane, and the assembly method of the second upper mold and the upper mold base is the same as the assembly method of the first upper mold and the upper mold base;

[0012] The lower mold assembly also includes a second lower mold. The working surface of the second lower mold is a plane. The assembly method of the second lower mold and the lower mold base is the same as that of the first lower mold and the lower mold base.

[0013] In conjunction with the first aspect, the widths of the first upper mold and the first lower mold, the second upper mold and the second lower mold are not greater than the width between adjacent ribs on the curved ribbed skin surface.

[0014] In conjunction with the first aspect, the upper mold base and the lower mold base can be a solid structure or a welded structure.

[0015] In conjunction with the first aspect, the upper mold base includes a first connecting plate, a middle force transmission structure plate, and a second connecting plate. The first connecting plate is connected to the upper platform of the press, the middle force transmission structure plate connects the first connecting plate and the second connecting plate, and the second connecting plate is connected to the first upper mold or the second upper mold.

[0016] The lower mold base includes a first connecting plate, a middle force transmission structure plate, and a second connecting plate. The first connecting plate is connected to the lower platform of the press, the middle force transmission structure plate connects the first connecting plate and the second connecting plate, and the second connecting plate is connected to the first lower mold or the second lower mold.

[0017] In conjunction with the first aspect, the upper mold base and the lower mold base have pressing grooves on both sides of the first connecting plate. These pressing grooves are opposite to the pressing grooves on the press platform and are connected by threaded connectors that pass through the first connecting plate and the pressing grooves on the press platform.

[0018] In conjunction with the first aspect, the second connecting plate of the upper mold base is provided with a concave groove or a protruding structure to cooperate with the first upper mold or the second upper mold; the second connecting plate of the lower mold base is provided with a concave groove or a protruding structure to cooperate with the first lower mold or the second lower mold.

[0019] Secondly, a method for flattening a curved surface with ribbed skin includes:

[0020] The first upper mold is mounted on the upper mold base, and the first lower mold is mounted on the lower mold base. They are then fixed with threaded connectors to assemble the upper and lower mold groups.

[0021] Install the upper module on the upper platform of the press, and install the lower module on the lower platform of the press;

[0022] Separate the upper platform and lower platform of the press, and place the curved ribbed skin on the first lower die;

[0023] The upper platform of the press is controlled to move downward, so that the first upper die and the first lower die close together to flatten the curved ribbed skin. If the flattening effect is not as expected after one or more flattening operations, the second upper die replaces the first upper die, and the second lower die replaces the first lower die to flatten the local or even all areas again.

[0024] If the length of the curved ribbed skin exceeds the mold length, a progressive flattening method is used; if the flattening effect does not meet expectations in one step, the mold closing and flattening steps are repeated.

[0025] After the curved ribbed skin is flattened, the upper platform of the press is controlled to return, and the flattened part is removed, completing the flattening process.

[0026] The curved surface ribbed skin flattening mold and method provided by the present invention have the following beneficial effects:

[0027] (1) The present invention provides a flattening mold and method for curved ribbed skin. The upper mold assembly includes an upper mold base and a first / second upper mold. The upper mold base is connected to the upper platform of the press. The first / second upper mold is fixed below the upper mold base. The working surface of the first upper mold is an arc surface, which is consistent with the concave-convex direction of the upper surface of the curved ribbed skin. The lower mold assembly includes a lower mold base and a first / second lower mold. The lower mold base is connected to the lower platform of the press. The first / second lower mold is fixed above the lower mold base. The working surface of the first lower mold is an arc surface, which is consistent with the concave-convex direction of the lower surface of the curved ribbed skin. The radius of the curved surface is not less than the radius of the curved surface of the curved ribbed skin. The upper platform of the press drives the upper mold assembly to reciprocate and flatten the curved surface of the curved ribbed skin. The flattening mold structure is designed for the structural characteristics of the curved ribbed skin. The upper / lower molds that cooperate on the upper / lower mold base can be replaced with various specifications. The upper mold and the lower mold can be adjusted up and down, which can efficiently and flexibly complete the flattening of the curved ribbed skin.

[0028] (2) The present invention provides a flattening mold and method for curved ribbed skin. The working surfaces of the first upper mold and the first lower mold of the flattening mold for curved ribbed skin are designed as arc surfaces with a radius of curvature of not less than 800 mm to adapt to skin materials with different curvatures. It is not recommended to design the working surfaces of the first upper mold and the first lower mold as planes. Directly using plane working surfaces to flatten curved ribbed skin will cause the roots of the ribs to bend, cannot be flattened, or even cause shearing, affecting the mechanical strength of the roots of the ribs. The working surfaces of the second upper mold and the second lower mold are planes, which can supplement the flattening of the curved ribbed skin and improve the flattening efficiency and flattening quality of the curved ribbed skin. Attached Figure Description

[0029] Figure 1 A schematic diagram of the flattening of a curved surface with ribbed skin;

[0030] Figure 2 Schematic diagram of a mold for flattening curved, ribbed skin;

[0031] Figure 3 Side view of a curved, ribbed, skin-flattened mold;

[0032] Figure 4 This is a front view of a flattened mold with a curved, ribbed skin.

[0033] Figure 5This is a schematic diagram of the upper module;

[0034] Figure 6 This is a schematic diagram of the upper mold base;

[0035] Figure 7 This is a schematic diagram of the upper mold;

[0036] Figure 8 This is a schematic diagram of the lower module;

[0037] Figure 9 This is a schematic diagram of the lower mold base;

[0038] Figure 10 This is a schematic diagram of the lower mold;

[0039] Figure 11 The ribbed skin is a curved surface with ribs located on the convex side of the arc.

[0040] Figure 12 The ribbed skin is a curved surface with ribs located on the concave side of the arc.

[0041] Figure 13 This is a schematic diagram of the flattened ribbed skin. Detailed Implementation

[0042] The features and advantages of the present invention will become clearer and more apparent from the following detailed description.

[0043] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0044] like Figures 1 to 10 As shown, the present invention provides a curved surface ribbed skin flattening mold, including an upper mold assembly 1 and a lower mold assembly 2.

[0045] The upper module 1 includes an upper mold base 11 and a first upper mold 12. The first upper mold 12 and the upper mold base 11 are precisely assembled through concave grooves and protruding structures, and are firmly connected by bolts.

[0046] The lower mold assembly 2 includes a lower mold base 21 and a first lower mold 22. The first lower mold 22 and the lower mold base 21 are precisely assembled through concave grooves and protruding structures, and are firmly connected by bolts.

[0047] The concave grooves of the curved ribbed skin flattening mold can be flexibly set on the upper / lower mold base or the first upper / lower mold, while the protruding structures are set on the other side to achieve interchangeability and adaptability between mold components. For example, the concave grooves of the curved ribbed skin flattening mold are respectively set on the upper mold base and the lower mold base, and the protruding structures are respectively set on the first upper mold and the first lower mold.

[0048] The upper and lower mold bases of the curved surface ribbed skin flattening mold can be made of a single solid structure or a welded structure to ensure sufficient structural strength, and the material is preferably high-strength mold steel. For example, if the upper and lower mold bases of the curved surface ribbed skin flattening mold are made of a welded structure, the material is H13 hot work mold steel.

[0049] The upper and lower mold bases of the curved ribbed skin flattening mold are specially designed with a connection structure to ensure that the mold can be stably connected to the press platform, improving the positioning accuracy and ease of operation. For example, the outer ends of the upper and lower mold bases of the curved ribbed skin flattening mold are designed with pressure grooves, and the mold can be stably connected to the press platform through "bolt-pressure plate".

[0050] Specifically: The upper / lower die base includes a first connecting plate, a central force transmission structure plate, and a second connecting plate. The first connecting plate is connected to the press platform, the central force transmission structure plate connects the first connecting plate and the second connecting plate, and the second connecting plate is connected to the first upper / lower die. The first connecting plate has blanking grooves on both sides, which are opposite to the blanking grooves on the press platform and are connected by threaded connectors passing through the blanking grooves of the first connecting plate and the press platform. The second connecting plate has concave grooves (or protrusions) that mate with the protrusions (or concave grooves) of the first upper die and the first lower die.

[0051] The working surfaces of the first upper and lower molds of the curved ribbed skin flattening mold are designed as arc surfaces with a radius of curvature of not less than 800 mm to accommodate skin materials with different curvatures. Optionally, the working surface of the first upper mold is a raised arc surface and the working surface of the first lower mold is a concave arc surface, or the working surface of the first upper mold is a concave arc surface and the working surface of the first lower mold is a raised arc surface to accommodate skins of different shapes. It is not recommended to design the working surfaces of the first upper and lower molds as flat surfaces. Directly using flat working surfaces to flatten curved ribbed skins will cause bending at the root of the ribs, failure to flatten, or even shearing, affecting the mechanical strength of the rib root.

[0052] In this invention, the upper module 1 also includes a second upper mold. The working surface of the second upper mold is designed as a planar structure. The second upper mold and the upper mold base 11 are precisely assembled through concave grooves and protruding structures, and are firmly connected by bolts.

[0053] The lower mold assembly 2 also includes a second lower mold. The working surface of the second lower mold is designed as a planar structure. The second lower mold and the lower mold base 21 are precisely assembled through concave grooves and protruding structures, and are firmly connected by bolts.

[0054] After flattening the curved, ribbed skin once or multiple times using an upper mold assembly with a first upper mold and a lower mold assembly with a first lower mold, if there are local areas where the skin is not flattened properly, the upper mold assembly with the first upper mold and the lower mold assembly with the first lower mold can be used again to flatten that area. Preferably, a second upper mold can be used to replace the first upper mold, and a second lower mold can be used to replace the first lower mold to flatten the local area or even the entire area again.

[0055] The widths of the first / second upper mold and the first / second lower mold are not greater than the width between adjacent ribs on the surface of the curved ribbed skin. To improve the matching of the first upper mold and the first lower mold, the radii of their curved surfaces are equal. The flattening method for the curved ribbed skin in this invention includes the following steps:

[0056] The first upper mold is mounted on the upper mold base, and the first lower mold is mounted on the lower mold base, and they are connected and fixed with bolts respectively;

[0057] Install the upper module on the upper platform of the press, and install the lower module on the lower platform of the press;

[0058] Separate the upper platform and lower platform of the press, and place the curved ribbed skin on the first lower die; the curved ribbed skin includes a curved ribbed skin with ribs located on the convex side of the arc and a curved ribbed skin with ribs located on the concave side of the arc. The working surface of the first upper die is consistent with the concave-convex direction of the upper surface of the curved ribbed skin, and the working surface of the first lower die is consistent with the concave-convex direction of the lower surface of the curved ribbed skin. Figure 11 and Figure 12 );

[0059] The upper platform of the press is controlled to move downward, so that the first upper die and the first lower die close together, and the curved ribbed skin is flattened.

[0060] If the length of the curved surface with ribs exceeds the length of the mold, a progressive flattening method can be used; if the flattening effect is not as expected after one flattening, the mold closing and flattening steps can be repeated; if the flattening effect is not as expected after one or more flattenings, the second upper mold replaces the first upper mold, the second lower mold replaces the first lower mold, and the local or even all areas are flattened again.

[0061] After the curved surface with ribbed skin is flattened ( Figure 13 Control the return stroke of the upper platform of the press, remove the flattened part, and complete the flattening process.

[0062] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

[0063] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A curved surface ribbed skin flattening mold, characterized in that, It includes an upper module (1) and a lower module (2); The upper mold assembly (1) includes an upper mold base (11) and a first upper mold (12). The upper mold base (11) is connected to the upper platform of the press. The first upper mold (12) is fixed below the upper mold base (11). The working surface is an arc surface, which is consistent with the concave and convex direction of the upper surface of the curved ribbed skin. The upper mold base (11) includes a first connecting plate, a middle force transmission structure plate and a second connecting plate. The first connecting plate is connected to the upper platform of the press. The middle force transmission structure plate is connected to the first connecting plate and the second connecting plate. The second connecting plate is connected to the first upper mold or the second upper mold. The lower mold assembly (2) includes a lower mold base (21) and a first lower mold (22). The lower mold base (21) is connected to the lower platform of the press. The first lower mold (22) is fixed above the lower mold base (21). The working surface is an arc surface, which is consistent with the concave-convex direction of the lower surface of the curved ribbed skin. The lower mold base (21) includes a first connecting plate, a middle force transmission structure plate and a second connecting plate. The first connecting plate is connected to the lower platform of the press. The middle force transmission structure plate is connected to the first connecting plate and the second connecting plate. The second connecting plate is connected to the first lower mold or the second lower mold. The upper module (1) also includes a second upper mold. The working surface of the second upper mold is a plane. The assembly method of the second upper mold and the upper mold base (11) is the same as the assembly method of the first upper mold (12) and the upper mold base (11). The lower mold assembly (2) also includes a second lower mold. The working surface of the second lower mold is a plane. The assembly method of the second lower mold and the lower mold base (21) is the same as the assembly method of the first lower mold (22) and the lower mold base (21). A curved ribbed skin is placed between the first upper mold (12) and the first lower mold (22). The curved surface radius of the first upper mold (12) and the first lower mold (22) is not less than the curved surface radius of the curved ribbed skin. The upper platform of the press drives the upper mold group to reciprocate and flatten the curved surface of the curved ribbed skin.

2. The curved surface ribbed skin flattening mold according to claim 1, characterized in that, The first upper mold (12) and the upper mold base (11) are assembled through a concave groove and a protruding structure, and are fastened by a threaded connector; The first lower mold (22) and the lower mold base (21) are assembled through a concave groove and a protruding structure, and are fastened by a threaded connector.

3. The curved surface ribbed skin flattening mold according to claim 1, characterized in that, The working surface radius of the first upper mold (12) is not less than 800mm; the working surface radius of the first lower mold (22) is not less than 800mm.

4. The curved surface ribbed skin flattening mold according to claim 1, characterized in that, The widths of the first upper mold (12) and the first lower mold (22), the second upper mold and the second lower mold are not greater than the width between adjacent ribs on the curved ribbed skin surface.

5. The curved surface ribbed skin flattening mold according to any one of claims 1 to 4, characterized in that, The upper mold base (11) and the lower mold base (21) adopt a solid structure or a welded structure.

6. The curved surface ribbed skin flattening mold according to claim 1, characterized in that, The upper mold base (11) and the lower mold base (21) have pressing grooves on both sides of the first connecting plate. The pressing grooves are opposite to the pressing grooves on the press platform and are connected by threaded connectors that pass through the first connecting plate and the pressing grooves on the press platform.

7. The curved surface ribbed skin flattening mold according to claim 1, characterized in that, The second connecting plate of the upper mold base (11) is provided with a concave groove or a protruding structure, which cooperates with the first upper mold (12) or the second upper mold; The second connecting plate of the lower mold base (21) is provided with a concave groove or a protruding structure, which cooperates with the first lower mold (22) or the second lower mold.

8. A method for flattening a curved surface with ribbed skin, characterized in that, The curved ribbed skin flattening mold according to any one of claims 1 to 7 includes: The first upper mold is mounted on the upper mold base, and the first lower mold is mounted on the lower mold base. They are then fixed with threaded connectors to assemble the upper and lower mold groups. Install the upper module on the upper platform of the press, and install the lower module on the lower platform of the press; Separate the upper platform and lower platform of the press, and place the curved ribbed skin on the first lower die; The upper platform of the press is controlled to move downward, so that the first upper die and the first lower die close together, and the curved ribbed skin is flattened. If the length of the curved surface with ribs exceeds the length of the mold, a progressive flattening method is used; if the flattening effect is not as expected after one flattening, the mold closing and flattening steps are repeated; if the flattening effect is not as expected after one or more flattenings, the second upper mold replaces the first upper mold, the second lower mold replaces the first lower mold, and the local or all areas are flattened again. After the curved ribbed skin is flattened, the upper platform of the press is controlled to return, and the flattened part is removed, completing the flattening process.

Images