CN112454760B - Mold surface deformation compensation mold repairing method for composite material member mold - Google Patents
Mold surface deformation compensation mold repairing method for composite material member mold Download PDFInfo
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- CN112454760B CN112454760B CN202011003426.4A CN202011003426A CN112454760B CN 112454760 B CN112454760 B CN 112454760B CN 202011003426 A CN202011003426 A CN 202011003426A CN 112454760 B CN112454760 B CN 112454760B
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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
- 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
- B29C33/3835—Designing moulds, e.g. using CAD-CAM
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses a mold surface deformation compensation mold repairing method for a composite material member mold, which belongs to the technical field of composite material member curing and forming and is characterized by comprising the following steps of: a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm; b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction; c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die; d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface. The invention can greatly reduce the shape deviation of the actual part and the theoretical part, shorten the correction period and reduce the cost.
Description
Technical Field
The invention relates to the technical field of composite material member curing forming, in particular to a composite material member mold surface deformation compensation mold repairing method.
Background
For the non-flat plate configuration of the composite material parts such as the wall plates, the curing deformation of the composite material member has an extremely adverse effect on the shape precision of the parts and the connection matching of the members, and in order to obtain the ideal composite material member, the following two methods are mainly adopted to reduce or eliminate the curing deformation at present: firstly, adjusting and optimizing curing process parameters, and adjusting a layering mode and a curing process; another approach is to profile the mold.
In practical applications, a more adopted method is mold profile correction. Conventional composite component mold modifications are essentially accomplished by experimentation and trial and error. The composite material member die is manufactured by milling and machining a theoretical die profile digital model by using a numerical control machine according to an A3 steel material, the manufacturing cost is high, when the die is corrected, the A3 steel is polished or welded on the theoretical digital model die in a repairing mode according to the comparison result of the shape data of a test piece and the shape of the theoretical digital model, the numerical control machine is used again for milling and machining according to the new die profile digital model, and the die capable of manufacturing qualified parts is obtained through repeated iteration. Complex operation, long time for repairing the mold, and the risk of polishing out-of-tolerance during the mold repairing process increases the risk of the rejection rate of the mold. Meanwhile, parts need to be repeatedly manufactured, the parts need to be detected and are repeatedly repaired, a large amount of manufacturing cost of the test piece is consumed, and the die repairing cost is high.
In the process of designing a mold surface by a computer, a method for forming and preparing a fiber resin composite material member product is disclosed in Chinese patent document with publication number CN 109732815A and publication date 2019, 05 and 10, and comprises the steps of taking a member target surface as an initial surface in finite element software, establishing a three-dimensional model according to the initial surface, carrying out cooling simulation from the hot-pressing curing forming temperature of the member to room temperature on a mold with the initial surface, and taking the cooled mold surface as an initial value of subsequent forming springback compensation iterative calculation.
The method for forming and preparing the fiber resin composite material member product disclosed in the patent document is based on the basic idea of mathematical optimization, an initial value which is closer to an optimal solution is determined before the iterative process of member forming springback compensation, and then iteration is performed, so that the purpose of reducing the iteration frequency is achieved, compared with a mode of directly taking a member target profile as an iterative calculation initial value, the iteration frequency can be reduced by about 50%, and the solution efficiency is greatly improved. However, there are still problems of long modification period of the mold surface, high cost and poor accuracy.
Disclosure of Invention
The invention provides a method for compensating and repairing the deformation of the molded surface of a composite material member mold, aiming at overcoming the defects of the prior art, and the invention can remove and add polished composite material glass fiber reinforced plastics on the molded surface of the original mold, accumulate the compensation deformation area in the positive direction, finish the mold repairing and the subsequent local optimization fine adjustment of a forming mold on the basis of not damaging the original mold body and ensure the precision; the efficient forming die that obtains and can reduce actual part and theoretical part appearance deviation by a wide margin shortens the correction cycle, reduce cost.
The invention is realized by the following technical scheme:
the method for compensating and repairing the mold for the deformation of the molded surface of the composite material member is characterized by comprising the following steps of:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
In the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
In the step b, the compensation deformation area specifically refers to an offset command in CATIA software, and the offset is an offset gap between the die repairing surface and the original die molded surface.
In the step c, the step of laying specifically means that the number of layers of the glass fiber reinforced plastic material, the laying sequence and the material piece filling shape required by gap filling compensation are calculated through self-intersection of the gap surfaces, the repair mould laying material pieces are manufactured according to the material thickness, and the glass fiber reinforced plastic material pieces are laid on the initial forming mould layer by layer according to the corresponding repair mould areas.
In the step c, the step of solidifying and polishing specifically refers to repairing a step difference area generated by the thickness of the material after the overlaying is finished, so that the molded surface of the trimming die is smooth and smooth.
The CATIA software is CAD/CAM software developed by Dasuo airplane, France.
The beneficial effects of the invention are mainly shown in the following aspects:
1. in the invention, a mould trimming surface is obtained based on a molded surface compensation algorithm of node deformation; b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction; c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die; d. then, a primary mold profile of the forming mold is obtained through digital measurement and is compared with a target mold profile, the shape, the position and the size of a difference area are obtained, a polishing tool is used for carrying out fine adjustment polishing and repairing on the difference area, and qualified modification of the mold profile is completed; the efficient forming die that obtains and can reduce actual part and theoretical part appearance deviation by a wide margin shortens the correction cycle, reduce cost.
2. According to the invention, the forward accumulated reverse compensation of the die is realized based on the node deformation compensation algorithm and the accurate die repairing area indication, the die repairing die capable of effectively reducing the deviation between the actual appearance and the theoretical appearance of the part can be obtained under the condition of not damaging the original die, and compared with the traditional die repairing method, the die repairing method has the advantages of lower scrap risk, lower cost, shorter time consumption, higher accuracy and easier realization.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, wherein:
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
Example 1
Referring to fig. 1, a method for compensating and repairing the deformation of the molded surface of a composite material member mold comprises the following steps:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
Example 2
Referring to fig. 1, a method for compensating and repairing the deformation of the molded surface of a composite material member mold comprises the following steps:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
In the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
Example 3
Referring to fig. 1, a method for compensating and repairing the deformation of the molded surface of a composite material member mold comprises the following steps:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation quantity of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a forward direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
In the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
In the step b, the compensation deformation area specifically refers to an offset command in CATIA software, and the offset is an offset gap between the die repairing surface and the original die molded surface.
Example 4
Referring to fig. 1, a method for compensating and repairing the deformation of the molded surface of a composite material member mold comprises the following steps:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
In the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
In the step b, the compensation deformation area specifically refers to an offset command in CATIA software, and the offset is an offset gap between the die repairing surface and the original die molded surface.
In the step c, the step of laying specifically means that the number of layers of the glass fiber reinforced plastic material, the laying sequence and the material piece filling shape required by gap filling compensation are calculated through self-intersection of the gap surfaces, the repair mould laying material pieces are manufactured according to the material thickness, and the glass fiber reinforced plastic material pieces are laid on the initial forming mould layer by layer according to the corresponding repair mould areas.
Example 5
Referring to fig. 1, a method for compensating and repairing the deformation of the molded surface of a composite material member mold comprises the following steps:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then performing laying, curing and polishing to obtain a target forming die profile primary die;
d. and then, acquiring a primary mold surface of the forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of the difference area, and finely adjusting and grinding the difference area by using a grinding tool to finish the qualified correction of the mold surface.
In the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
In the step b, the compensation deformation area specifically refers to an offset command in CATIA software, and the offset is an offset gap between the die repairing surface and the original die molded surface.
In the step c, the step of laying specifically refers to calculating the number of layers of the glass fiber reinforced plastics required by compensating clearance filling, the laying sequence and the material piece filling shape through self-intersection of clearance surfaces, manufacturing the repair mould laying material pieces according to the material thickness, and laying each glass fiber reinforced plastics material piece on the initial forming mould layer by layer according to the corresponding repair mould area.
In the step c, the step of solidifying and polishing specifically refers to repairing a step difference area generated by the thickness of the material after the overlaying is finished, so that the molded surface of the trimming die is smooth and smooth.
A, obtaining a die trimming surface of the die based on a molded surface compensation algorithm of node deformation; b. determining the shape and the compensation amount of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a positive direction; c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die; d. then, a primary mold profile of the forming mold is obtained through digital measurement and is compared with a target mold profile, the shape, the position and the size of a difference area are obtained, a polishing tool is used for carrying out fine adjustment polishing and repairing on the difference area, and qualified modification of the mold profile is completed; the efficient forming die that obtains and can reduce actual part and theoretical part appearance deviation by a wide margin shortens the correction cycle, reduce cost.
Under the condition of a node deformation compensation algorithm and accurate mould repairing region indication, the forward accumulated reverse compensation of the mould is realized, the mould repairing mould capable of effectively reducing the deviation between the actual appearance and the theoretical appearance of the part can be obtained under the condition of not damaging the original mould, and compared with the traditional mould repairing method, the mould repairing method has the advantages of lower scrap risk, lower cost, shorter consumed time, higher accuracy and easier realization.
Claims (3)
1. The method for compensating and repairing the mold for the deformation of the molded surface of the composite material member is characterized by comprising the following steps of:
a. obtaining a die trimming surface of the die based on a node deformation profile compensation algorithm;
b. determining the shape and the compensation quantity of a compensation mould repairing area, deviating the molded surface of an original mould, and accumulating the compensation deformation area in a forward direction;
c. filling the shape of the positive accumulated die repairing area and the compensation clearance value with a glass fiber reinforced plastic material, and then carrying out laying, curing and polishing to obtain a target forming die profile primary die;
d. then, acquiring a primary mold surface of a forming mold through digital measurement, comparing the primary mold surface with a target mold surface, acquiring the shape, position and size of a difference area, and finely adjusting, grinding and repairing the difference area by using a grinding tool to finish the qualified correction of the mold surface;
in the step b, the compensation deformation area specifically refers to application of an offset command in CATIA software, and the offset is an offset gap between a die repairing surface and an original die molded surface;
in the step c, the step of laying specifically means that the number of layers of the glass fiber reinforced plastic material, the laying sequence and the material piece filling shape required by gap filling compensation are calculated through self-intersection of the gap surfaces, the repair mould laying material pieces are manufactured according to the material thickness, and the glass fiber reinforced plastic material pieces are laid on the initial forming mould layer by layer according to the corresponding repair mould areas.
2. The method for compensating the die repairing according to the deformation of the molded surface of the composite material member die, which is characterized by comprising the following steps of: in the step b, determining the shape and the compensation amount of the compensation mold repairing area specifically means determining the shape and the compensation amount of the compensation mold repairing area after the target mold profile model is aligned with the original mold model.
3. The method for compensating the mold repairing of the composite material member by the mold surface deformation according to claim 1, wherein: in the step c, the step of curing and polishing specifically refers to repairing a step difference area generated by the thickness of the material after the overlaying is finished, so that the molded surface of the trimming mold is smooth.
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| CN113239454B (en) * | 2021-04-06 | 2023-06-13 | 中国第一汽车股份有限公司 | Calculation method of mold profile compensation value |
| CN113306051B (en) * | 2021-05-26 | 2022-02-15 | 南京航空航天大学 | Method for determining molded surface of forming die for curing composite material member |
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| CN113942151B (en) * | 2021-10-21 | 2022-10-04 | 山东双一科技股份有限公司 | Manufacturing method of bonding angle die for wind driven generator blade |
| CN113977212B (en) * | 2021-10-29 | 2024-03-29 | 湖北江山专用汽车有限公司 | Method for repairing blade die of mixer truck, die and blade |
| CN114713661B (en) * | 2022-04-13 | 2024-01-26 | 重庆电子工程职业学院 | Method for repairing stamping die by referring to workpiece rebound parameters |
| CN115609250A (en) * | 2022-06-10 | 2023-01-17 | 眉山博雅新材料股份有限公司 | Mould processing method and system |
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