CN110901103A - Manufacturing method of low-cost modular composite material forming tool - Google Patents
Manufacturing method of low-cost modular composite material forming tool Download PDFInfo
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- CN110901103A CN110901103A CN201911166145.8A CN201911166145A CN110901103A CN 110901103 A CN110901103 A CN 110901103A CN 201911166145 A CN201911166145 A CN 201911166145A CN 110901103 A CN110901103 A CN 110901103A
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- tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
A manufacturing method of a low-cost modular composite material forming tool belongs to the technical field of tool manufacturing, and comprises the following manufacturing steps: (1) manufacturing a tool frame, (2) manufacturing a tool profile backing, (3) manufacturing a tool profile matching surface, (4) manufacturing a tool profile, and (5) pasting the tool profile; the method can omit the manufacturing process of the female die, uses a small number of tool frame structures to match with tool profiles with various profiles, completes the manufacturing, replacement and correction of the composite material tool through the overlaying, accumulation, solidification and processing of materials, is suitable for the manufacturing process of the forming tool in the research and development stage of small-batch composite material products with high profiles and dimensional precision requirements, can greatly save the research and development cost, and shortens the research and development period.
Description
Technical Field
The invention belongs to the technical field of tool manufacturing, and particularly relates to a manufacturing method of a low-cost modular composite material forming tool.
Background
The composite material product usually adopts aluminum, high-strength steel, invar steel, carbon fiber composite material and the like as the preferred materials of the forming tool, and the problems of heat efficiency, temperature uniformity, operability and the like are considered, and most of the composite material product mainly adopts a frame type structure. With the requirements of the application field on the profile precision and the size precision of composite material products and the continuous improvement of the manufacturing efficiency of the composite material products, the traditional metal mold has the problems of large thermal expansion coefficient, heavy weight, slow response and the like, and the traditional metal mold can not meet the development of the composite material industry gradually as a mold material; compared with the composite material tool, the composite material tool has the advantages of good thermal expansion performance matching, low density, small heat capacity, certain repairability and the like, and is increasingly applied to the manufacturing process of composite material products.
However, the conventional composite material tooling generally adopts tooling prepreg for manufacturing, and although a set of female die can be used for manufacturing a plurality of sets of composite material tooling, the requirement of a large-scale manufacturing process of composite material products can be met, high material cost and manufacturing cost can be generated, and the tooling is not suitable for manufacturing a forming tooling in a development stage of small-scale composite material products with high dimensional precision requirements.
Therefore, the invention provides a low-cost modular composite material forming tool manufacturing method, which is suitable for the forming tool manufacturing process in the research and development stage of small-batch composite material products with high profile and dimensional accuracy requirements, and can greatly save research and development cost and shorten the research and development period.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for manufacturing a low-cost modular composite material molding tool, which can omit the manufacturing process of a female die, match tool profiles with various profiles and contours by a small number of tool frame structures, and complete the manufacturing, replacing and correcting of a composite material tool through the material stacking, accumulation, solidification and processing. The method can quickly realize the manufacturing process of the composite material forming tool, is suitable for the development stage of small-batch composite material products with high requirements on precision, and comprises the following steps:
step 1: adopting a fixed connection method of riveting or screwing a matched gasket, combining the frame base materials into a frame structure through connecting pieces such as angle pieces or tee joints, and reserving an assembling hole or an embedded assembling bolt on one side of the frame close to the molded surface of the tool, namely finishing the manufacture of the tool frame 1;
step 2: machining a backing substrate into lining plates, wherein one side of each lining plate is provided with a cambered surface with a certain curvature, the other side of each lining plate is a straight surface and can be connected with a tool frame 1 through corner pieces, and the lining plates form a tool profile backing according to the distribution form of the tool frame 1, so that the manufacturing of a tool profile backing 2 is completed;
and step 3: matching surface base materials matched with the arc surface of the tool profile backing 2 are connected with one side of the arc surface of each lining plate through corner pieces, a plurality of matching surface base materials are spliced to form a tool profile matching surface 3, and a layer of non-porous isolating film is laid on the matching surface, so that the manufacturing of the tool profile matching surface 3 is completed; the composite material molding tool is shown in a schematic diagram in fig. 1;
and 4, step 4: sequentially laying a vacuum bag and a nonporous isolation film on the surface of the nonporous isolation film, laying or accumulating mold plastics on the nonporous isolation film to prepare a tool profile blank, curing and molding by adopting a vacuum bag pressing or autoclave molding process after packaging, and processing to a tool theoretical profile according to a tool digital model to finish the manufacturing of a tool profile 4;
and 5: sticking a layer of double-sided adhesive film on the fitting surface 3 of the tool profile, placing the tool profile 4 which completes the machining process of the theoretical profile of the tool on the double-sided adhesive film, and ensuring no gap between the tool profile 4 and the fitting surface 3 of the tool profile, namely completing the manufacture of the low-cost modular composite material forming tool;
the manufacturing method of the low-cost modular composite material forming tool comprises the following steps:
in the step 1, the frame base material is a carbon fiber fabric reinforced thermosetting resin-based composite material plate or tube, the compression strength is more than or equal to 550MPa, the bending strength is more than or equal to 820MPa, and the long-term use temperature is higher than the curing temperature of a composite material product;
in the step 2, the backing substrate is a carbon fiber fabric reinforced thermosetting resin-based composite material plate, the compression strength is more than or equal to 550MPa, and the long-term use temperature is higher than the curing temperature of a composite material product;
in the step 3, the base material on the matching surface is a carbon fiber fabric reinforced thermosetting resin-based composite material plate, the bending strength is more than or equal to 820MPa, the modulus is more than or equal to 60GPa, and the long-term use temperature is higher than the curing temperature of a composite material product;
in the step 3, when the matched surface substrates are spliced, a gap of 0.8-1.0 mm needs to be reserved between the adjacent substrates, and the matched surface profile of the tool formed by splicing the substrates with a plurality of matched surfaces is close to the profile of the tool;
in the step 4, the size of the vacuum bag is not less than 2 times of the area of the molded surface of the tool;
in the step 4, the molding compound comprises a sheet molding compound or/and a bulk molding compound, wherein the reinforcing phase is chopped carbon fibers or recycled carbon fiber fabric, and the matrix phase is high-temperature-resistant epoxy resin;
in the step 4, the packaging is to wholly coat the tool profile blank by adopting a vacuum bag;
in the step 5, the double-sided adhesive film is a high-temperature-resistant adhesive with a carrier, and the long-term use temperature of the double-sided adhesive film is higher than the curing temperature of the composite material product.
Compared with the prior art, the low-cost modular composite material forming tool manufacturing method has the beneficial effects that:
the molding compound containing chopped carbon fibers or recycled carbon fiber fabrics is used as a tool profile material, and the material and manufacturing cost is far lower than that of a tool prepreg used in the prior art;
the manufacturing of the tool frame can be completed through the combination of the composite material plates or the composite material pipes, the universality is strong, and the material and manufacturing cost is far lower than that of the traditional composite material forming tool frame;
the manufacturing method does not need a female die, and the processing difficulty of the molding compound cured material is lower than that of the tool prepreg cured material, so that the manufacturing link is reduced, and the manufacturing period is shortened;
the packaging and curing mode of the tool profile blank solves the problem of poor air tightness of the traditional composite material forming tool, and the combination and disassembly mode of the tool profile and the tool profile matching surface is simple and easy to implement;
the manufacturing process of the composite material forming tool with different profiles can be realized through the replacement of the tool profile backing, the tool profile matching surface and the tool profile, the tool profile is easy to correct and maintain, and the tool has the advantage of convenience in subsequent maintenance.
Drawings
Fig. 1 is a schematic view of a composite material molding tool assembly according to the present invention: 1-tool frame, 2-tool profile backing, 3-tool profile matching surface and 4-tool profile.
Detailed Description
The invention discloses key technical points including a combination form of a composite material forming tool, a tool profile backing, a tool profile matching surface, material selection, a connection mode, a forming method and the like in the manufacturing, replacing and correcting processes of a tool profile.
The present invention will be further described with reference to specific examples, but the present invention is not limited to these examples.
A manufacturing method of a low-cost modular composite material forming tool comprises the following steps:
step 1: riveting a composite material square tube (DS1207.3) to form a tool frame 1 through a tee joint, and reserving an assembling hole on one side, close to the tool profile, of the tool frame 1;
step 2: machining a composite material plate (DS1207.3) to form a lining plate with a curvature arc surface on one side and a connection with a tool frame through a corner piece on the other side, wherein the lining plates form a tool profile backing 2 according to the distribution form of the tool frame 1;
and step 3: connecting a composite material plate (DS1207.3) with one side of the cambered surface of each lining plate through a corner piece, combining a plurality of plates into a tool profile matching surface 3, wherein the clearance between the plates is
In order to avoid the damage of the matching surface caused by the high-temperature expansion of the base material, a pressure sensitive adhesive tape (FLASHBREAKER1) is pasted at the gap, and a layer of non-porous isolating membrane (WL5200) is laid on the matching surface 3 of the tool profile;
and 4, step 4: sequentially laying a vacuum bag (IPPLONDPT1000) and a nonporous isolation film (WL5200) on the nonporous isolation film to ensure that the nonporous isolation film, the vacuum bag and the nonporous isolation film are laid smoothly without folds, laying a carbon fiber sheet molding compound (DS1209.5) to prepare a tool profile blank, integrally coating and packaging by adopting an autoclave molding process, curing and molding, and processing to a tool profile 4 according to a tool profile model;
and 5: pasting a double-sided tape (Airhold1CBS) on the tool profile matching surface 3, placing the tool profile 4 on the tool profile matching surface 3, ensuring no clearance between the tool profile 4 and the tool profile matching surface 3, and finishing the manufacturing process of the low-cost modular composite material molding tool; the composite material molding tool is schematically combined as shown in fig. 1.
Claims (9)
1. A manufacturing method of a low-cost modular composite material forming tool comprises the following steps:
step 1: the frame base material is combined into a frame structure through connecting pieces such as angle pieces or tee joints by adopting a fixed connection method of riveting or screwing a matched gasket, and an assembling hole or an embedded assembling bolt is reserved on one side, close to the molded surface of the tool, of the frame, so that the manufacturing of the tool frame is completed;
step 2: machining a backing substrate into lining plates, wherein one side of each lining plate is provided with a cambered surface with a certain curvature, the other side of each lining plate is a straight surface and can be connected with a tool frame through corner pieces, and the plurality of lining plates form a tool profile backing according to the distribution form of the tool frame, so that the manufacturing of the tool profile backing is completed;
and step 3: matching surface base materials matched with the arc surface of the tool profile backing are connected with one side of the arc surface of each lining plate through corner pieces, a plurality of matching surface base materials are spliced to form a tool profile matching surface, and a layer of non-porous isolating film is laid on the matching surface, so that the manufacturing of the tool profile matching surface is completed;
and 4, step 4: sequentially laying a vacuum bag and a nonporous isolation film on the surface of the nonporous isolation film, laying or accumulating mold plastics on the nonporous isolation film to prepare a tool profile blank, curing and molding by adopting a vacuum bag pressing or autoclave molding process after packaging, and processing to a tool theoretical profile according to a tool digital model to finish the manufacturing of the tool profile;
and 5: and pasting a layer of double-sided adhesive film on the fitting surface of the tool profile, placing the tool profile which completes the machining process of the theoretical profile of the tool on the double-sided adhesive film, and ensuring no clearance between the tool profile and the fitting surface of the tool profile, namely completing the manufacture of the low-cost modular composite material forming tool.
2. The manufacturing method of the low-cost modular composite material forming tool according to claim 1, wherein in the step 1, the frame base material is a carbon fiber fabric reinforced thermosetting resin-based composite material plate or tube, the compression strength is not less than 550MPa, the bending strength is not less than 820MPa, and the long-term service temperature is higher than the curing temperature of a composite material product.
3. The manufacturing method of the low-cost modular composite material forming tool according to claim 1, wherein in the step 2, the backing substrate is a carbon fiber fabric reinforced thermosetting resin-based composite material plate, the compression strength is not less than 550MPa, and the long-term use temperature is higher than the curing temperature of a composite material product.
4. The manufacturing method of the low-cost modular composite material forming tool according to claim 1, wherein in the step 3, the base material on the matching surface is a carbon fiber fabric reinforced thermosetting resin-based composite material plate, the bending strength is larger than or equal to 820MPa, the modulus is larger than or equal to 60GPa, and the long-term use temperature is higher than the curing temperature of a composite material product.
5. The manufacturing method of a low-cost modular composite molding tool according to claim 1, characterized in that in the step 3, when matching surface substrates are spliced, a gap of 0.8mm to 1.0mm needs to be left between adjacent substrates, and the matching surface profile of the tool profile formed by splicing a plurality of matching surface substrates approaches to the profile of the tool profile.
6. The method of claim 1 wherein in step 4, the size of the vacuum bag is no less than 2 times the profile area of the tool.
7. The manufacturing method of the low-cost modular composite material forming tool according to claim 1, wherein in the step 4, the molding compound comprises a sheet molding compound or/and a bulk molding compound, wherein the reinforcing phase is chopped carbon fibers or recycled carbon fiber fabric, and the matrix phase is high-temperature-resistant epoxy resin.
8. The method as claimed in claim 1, wherein the step 4 of encapsulating is performed by integrally wrapping the tooling profile blank with a vacuum bag.
9. The manufacturing method of the low-cost modular composite material forming tool according to claim 1, wherein in the step 5, the double-sided adhesive film is a high-temperature-resistant adhesive with a carrier, and the long-term use temperature is higher than the curing temperature of the composite material product.
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| CN201911166145.8A CN110901103B (en) | 2019-11-25 | 2019-11-25 | Manufacturing method of low-cost modular composite material forming tool |
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| CN201911166145.8A CN110901103B (en) | 2019-11-25 | 2019-11-25 | Manufacturing method of low-cost modular composite material forming tool |
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| CN110901103B CN110901103B (en) | 2021-07-27 |
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Cited By (2)
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| CN113771386A (en) * | 2021-09-27 | 2021-12-10 | 沈阳航空航天大学 | Composite part forming tool manufacturing method suitable for wet forming process |
| CN115179568A (en) * | 2022-06-20 | 2022-10-14 | 成都飞机工业（集团）有限责任公司 | Rib forming die for RFI liquid forming reinforced wall plate and preparation method |
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| CN110901103B (en) | 2021-07-27 |
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