Composite material general forming die

Abstract

The utility model provides a composite material universal forming die. The composite material universal forming die comprises a supporting frame, a frame, a steel plate and a molded surface piece. The frame is detachably arranged on the support frame, the steel plate is fixed on the frame, the molded surface piece is adhered to the steel plate through a double-component structural adhesive, the molded surface piece is made of wood, and the surface roughness of the molded surface piece is not less than Ra1.6. The forming die is prepared in the mode that the forming surface piece is independently arranged through wood and fixed to the steel plate through the two-component structural adhesive, on one hand, the overall manufacturing cost of the forming die can be effectively reduced, the manufacturing period of the forming die can be effectively shortened, and on the other hand, the whole forming die does not need to be replaced when new product research and development need to be conducted; and instead, the molded surface piece is taken down from the steel plate, and then a new molded surface piece corresponding to a new product is bonded, so that the whole replacement cost is low, the replacement period is short, and the mold is very suitable for being used in a technical research and development room where a forming mold structure needs to be frequently replaced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of composite material forming, and particularly relates to a general forming die for composite materials. BACKGROUND

[0002] There are generally three types of forming processes for composite material parts, i.e., hot press tank, OOA and liquid forming process. A die is a necessary process equipment in forming. Typical products include fuselage skin, wing skin, flat tail skin and tail skin. The die needs to bear different pressures and temperatures due to the process, product temperature resistance and product performance requirements. Therefore, in order to effectively improve the service life of the die, the die material is usually made of aluminum alloy, steel, glass steel, carbon fiber and short fiber 3D printing materials, so that the die manufacturing cost is high and the manufacturing cycle is long. This is relatively high in cost performance for enterprises that need to produce the same model of products for a long time, but for laboratories that need to develop technology, the die of a certain size needs to be replaced after the development of a product of a certain shape (structure / model) is completed, that is, the die itself needs to be used for a short period of time. Therefore, the composite material forming die with high manufacturing cost and long manufacturing cycle is not suitable for technology development laboratories that need to replace the die frequently to adapt to different product development. CONTENT OF THE UTILITY MODEL

[0003] The application aims to solve the technical problem that the composite material forming die is not suitable for technology development laboratories that need to replace the die frequently to adapt to different product development due to the high manufacturing cost and long manufacturing cycle of the composite material forming die in the prior art. The application provides a general forming die for composite materials to effectively reduce the manufacturing cost and manufacturing cycle of the composite material forming die.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical solutions:

[0005] A general forming die for composite materials, comprising a support frame, a frame, a steel plate and a profile piece.

[0006] The frame is detachably arranged on the support frame, the steel plate is fixed on the frame, the profile piece is adhesively connected to the steel plate by means of a two-component structural adhesive, the profile piece is made of wood, and the surface roughness of the profile piece is not less than Ra1.6.

[0007] Further, the support frame is welded by using a profile steel, and the outer surface of the support frame is sequentially sprayed with a sandblasting layer, a primer layer and a topcoat layer.

[0008] Further, the frame is welded by using a profile steel, and the outer surface of the frame is sequentially sprayed with a sandblasting layer, a primer layer and a topcoat layer.

[0009] Further, the bottom surface of the frame is provided with a clamping groove, which is formed by surrounding a section steel and fixedly welded to the bottom surface of the frame, and the top surface of the support frame is clamped in the clamping groove.

[0010] Further, the steel plate is made of a galvanized embossed steel plate.

[0011] Further, the thickness of the steel plate is greater than 5mm.

[0012] Further, the steel plate and the frame are fixed together by intermittent welding.

[0013] Further, the profiled part is made of high-density board, poplar or pine.

[0014] Further, the surface of the profiled part is coated with a layer of resin.

[0015] Further, the profiled part is made of a felled wood material.

[0016] Further, the felled wood material has a hardness of 70-75 shordD, a thermal expansion coefficient of (40-45) X 10 - 6 K -1 , a thermal deformation temperature of 75-130℃, a bending strength of 35-45Mpa, a compressive strength of 49-90Mpa, and a tensile strength of 25-30Mpa.

[0017] The beneficial effects of the present application are:

[0018] The present application prepares a forming mold by using wood to separately set a profiled part and fixing the profiled part on a steel plate by a two-component structural adhesive. On the one hand, the overall preparation cost and preparation period of the forming mold can be effectively reduced. On the other hand, when new product development is needed, the entire forming mold does not need to be replaced, but only the profiled part needs to be removed from the steel plate, and then a new profiled part corresponding to the new product is bonded, the overall replacement cost is low, the replacement period is short, and it is very suitable for technical research and development rooms that often need to replace the structure of the forming mold. At the same time, the present application can select and replace profiled parts of different material types according to the actual forming process needs, so that the forming mold can adapt to hot press tank, OOA, liquid forming and other forming processes, and has a wide range of applications.

[0019] The support frame and the support frame of the present application are connected in a detachable manner, so that in actual application process, the user can select a support frame with appropriate height for use according to actual needs, so as to improve the actual use comfort. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 The structural schematic diagram of the general forming die of the composite material provided by the embodiments of the present application is shown in the figure.

[0022] Figure 2 The structural schematic diagram of the support frame provided by the embodiments of the present application is shown in the figure.

[0023] Explanation of the reference signs:

[0024] Support frame 1, frame 2, steel plate 3, profiled part 4. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely in the following description with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0030] As shown in Figure 1 and Figure 2 The composite material universal forming die provided by the embodiment of the application comprises two support frames 1, a frame 2, a steel plate 3 and a profile part 4.

[0031] The two support frames 1 and the frame 2 are both welded from profile steel, and the profile steel is GB / T6728-2017 "cold-bending hollow profile steel for structure". The model of the profile steel can effectively ensure that the support frame 1 and the frame 2 have sufficient support strength, and the support frame 1 and the frame 2 can be subjected to vibration treatment after being welded to eliminate welding stress. The outer surface of the support frame 1 and the outer surface of the frame 2 are successively sprayed with a sandblasting layer, a primer layer and a topcoat layer. The long-term service life of the support frame 1 and the frame 2 can be effectively improved.

[0032] The bottom surface of the frame 2 is provided with two clamping grooves 5 (not labeled in the figure) matched with the support frame 1. The clamping grooves are made by surrounding the bottom surface of the frame 2 with a section steel and fixedly welded. In use, the top surface of the support frame 1 is clamped in the clamping grooves. The clamping connection makes the user of the forming die in actual application process can select the appropriate height of the support frame according to the actual needs, so as to improve the actual use comfort. From the above analysis, the frame 2 and the support frame 1 are connected in a detachable manner to achieve the above purpose / effect. The specific connection between the frame 2 and the support frame 1 is not limited to the clamping method, and other detachable connection methods known in the art are also applicable to the present application.

[0033] The steel plate 3 is made of galvanized embossed steel plate. It has excellent corrosion resistance, and can improve the support force and adhesion of the profiled part 3. The thickness of the steel plate 3 is greater than 5 mm. In actual application process, when the product size is too long, the standard galvanized embossed steel plate is not long enough, and multiple galvanized embossed steel plates need to be used for tailor welding. After tailor welding, the steel plate 3 needs to be tested for weld gas tightness, which needs to meet the requirements of aviation standard HB 53242 (vacuum degree is not less than-0.092 MPa and remains stable, within 10 minutes after stopping pumping, the vacuum degree should not decrease by more than 0.017 MPa). The steel plate 3 is fixed on the frame 2 by intermittent welding, the profiled part 4 is adhered to the steel plate 3 by two-component structural adhesive, the profiled part 4 is made of wood, and the surface roughness of the profiled part 4 is not less than Ra1.6. The application prepares a forming die by using wood to set a profiled part and fixing it on the steel plate 3 by two-component structural adhesive. On the one hand, it can effectively reduce the overall preparation cost and preparation period of the forming die. On the other hand, when new product development is needed, the entire forming die does not need to be replaced, but only the profiled part 4 needs to be removed from the steel plate 3, and the new profiled part 4 corresponding to the new product needs to be adhered. The overall replacement cost is low, the replacement period is short, and it is very suitable for technical research and development rooms which need to replace the forming die structure frequently. In actual application process, the application can select and replace profiled parts 4 of different types of wood according to the actual forming process needs, so that the forming die can adapt to hot press tank, OOA, liquid forming and other forming processes, and has wide application range.

[0034] For example, when the service temperature of the forming mold is normal temperature and the pressure resistance is 0.1 MPa, the profiled part 4 can be made of ordinary wood (for example, high-density board, poplar or pine). When prepared, the wood is spliced and bonded on the steel plate 3 by using a normal-temperature two-component structural adhesive, after the structural adhesive is cured, the forming mold is placed on a machine tool for processing and line marking, after the processing is completed, a layer of unsaturated resin or epoxy resin with a temperature resistance not lower than 40°C is applied on the surface of the profiled part 4, after the processing is completed, the surface of the profiled part 4 is polished to ensure that the surface roughness is not less than Ra1.6. The profiled part 4 of this type is suitable for normal-temperature bag pressing and hand paste process and vacuum introduction process.

[0035] When the service temperature of the forming mold is 60-70°C and the pressure resistance is 0.1 MPa, the profiled part 4 can be made of a fir wood material with a hardness of 70-74 shordD, a thermal expansion coefficient of (40-45) X 10-6 K-1, a thermal deformation temperature of 75-80°C, a bending strength of 35-40 MPa, a compression strength of 49-55 MPa and a tensile strength of 25-30 MPa. When prepared, the fir wood material is spliced and bonded on the steel plate 3 by using a two-component structural adhesive with a temperature resistance of 80°C, after the structural adhesive is cured, the forming mold is placed on a machine tool for processing and line marking, after the processing is completed, the surface of the profiled part 4 is polished to ensure that the surface roughness is not less than Ra1.6. The profiled part 4 of this type is suitable for bag pressing and hand paste process, vacuum introduction process and OOA process (the highest curing temperature is not higher than 70°C).

[0036] When the service temperature of the forming mold is 120°C and the pressure resistance is 0.1-0.3 MPa, the profiled part 4 can be made of a fir wood material with a hardness of 70-75 shordD, a thermal expansion coefficient of (40-45) X 10-6 K-1, a thermal deformation temperature of 120-130°C, a bending strength of 35-40-45 MPa, a compression strength of 85-90 MPa and a tensile strength of 25-30 MPa. When prepared, the fir wood material is spliced and bonded on the steel plate 3 by using a two-component structural adhesive with a temperature resistance of 120°C, after the structural adhesive is cured, the forming mold is placed on a machine tool for processing and line marking, after the processing is completed, the surface of the profiled part 4 is polished to ensure that the surface roughness is not less than Ra1.6. The profiled part 4 of this type is suitable for bag pressing and hand paste process, vacuum introduction process, OOA process and autoclave process (the highest curing temperature is not higher than 120°C).

[0037] The general forming die of the composite material provided by the embodiments of the present application is described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and the modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite universal forming tool characterized by: The support frame (1), the frame (2), the steel plate (3) and the profiled piece (4) are included. The frame (2) is detachably arranged on the support frame (1), the steel plate (3) is fixed on the frame (2), the profiled piece (4) is adhered on the steel plate (3) by two-component structural adhesive, the profiled piece (4) is made of wood, and the surface roughness of the profiled piece (4) is not less than Ra1.

6.

2. The composite universal molding tool of claim 1, wherein: The support frame (1) is welded by profiled steel, and the outer surface of the support frame (1) is sequentially sprayed with a sand blasting layer, a primer layer and a topcoat layer.

3. The composite universal molding tool of claim 1, wherein: The frame (2) is welded by profiled steel, and the outer surface of the frame (2) is sequentially sprayed with a sand blasting layer, a primer layer and a topcoat layer.

4. The composite universal molding tool of claim 1, wherein: The bottom surface of the frame (2) is provided with a clamping groove, the clamping groove is formed by surrounding and fixedly welding profiled steel on the bottom surface of the frame (2), and the top surface of the support frame (1) is clamped in the clamping groove.

5. The composite universal molding tool of claim 1, wherein: The thickness of the steel plate (3) is greater than 5 mm.

6. The composite universal molding tool of claim 1, wherein: The steel plate (3) and the frame (2) are fixed together by intermittent welding.

7. The composite universal molding tool of claim 1, wherein: The profiled piece (4) is made of high-density plate, poplar or pine.

8. The composite universal molding tool of claim 1, wherein: The profiled piece (4) is coated with a layer of resin.

9. The composite universal molding tool of claim 1, wherein: The profiled piece (4) is made of felled wood material.

10. The composite universal molding tool of claim 9, wherein: The felled wood material is felled wood with a hardness of 70-75 shordD, a thermal expansion coefficient of (40-45) X 10 -6 K -1 , a thermal deformation temperature of 75-130°C, a bending strength of 35-45 Mpa, a compression strength of 49-90 Mpa, and a tensile strength of 25-30 Mpa.

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