CN111216378A - Production method of continuous glass fiber board reinforced plastic instrument board beam assembly - Google Patents
Production method of continuous glass fiber board reinforced plastic instrument board beam assembly Download PDFInfo
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- CN111216378A CN111216378A CN201911057552.5A CN201911057552A CN111216378A CN 111216378 A CN111216378 A CN 111216378A CN 201911057552 A CN201911057552 A CN 201911057552A CN 111216378 A CN111216378 A CN 111216378A
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- glass fiber
- continuous glass
- assembly
- beam assembly
- reinforcing plate
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3008—Instrument panels
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a production method of a continuous glass fiber plate reinforced plastic instrument board beam assembly, belonging to the production method of the plastic instrument board beam assembly. Weak parts of the structure are obtained by a finite element topological optimization method, and the full-plastic instrument panel assembly is locally reinforced by utilizing the local reinforcement of the continuous glass fiber plate, so that the stress is uniform, and the stress concentration is reduced; the density of the continuous glass fiber board of the invention is 1700kg/m3Much smaller than steel inserts, light in weight; the continuous glass fiber board can be fused with plastic materials, so that the reliability is high; the degree of freedom of plastic part design is high, local reinforcement is carried out according to finite element analysis results, the overall stress is uniform, and the performance is excellent; compared with full-plastic instrument board beam assembly and instrument board beam assembly with metal inserts, the beam assembly achieves excellent performanceAnd the light weight and the structure are easy to realize.
Description
Technical Field
The invention belongs to a production method of a plastic instrument board beam assembly, and particularly relates to a design method of a continuous glass fiber plate reinforced plastic instrument board beam assembly, which is suitable for the field of new energy automobiles.
Background
With the wide popularization of new energy automobiles in China, the light weight of parts becomes the key point of design and development of various whole automobile factories, the instrument board beam assembly bears a steering column, a steering wheel, the instrument board assembly and the like, and the driving and riding comfort is affected due to jolt and impact on the road surface, so that the plastic instrument board beam assembly has enough rigidity and strength.
Due to space limitation, the rigidity and modal performance of a mounting point of a steering column are difficult to meet the requirements of the traditional full-plastic instrument board beam; the plastic instrument board beam containing the metal insert has large mass, which is not beneficial to the light weight of the whole vehicle; the metal and the plastic have the risk of slippage, and the reliability is poor due to vibration, so that the metal and the plastic are not suitable for batch application.
The continuous glass fiber board is a thermoplastic material reinforced in a continuous fiber weaving mode, the base material is polyamide 6, the thickness is 1mm, the elastic modulus is 18000Mpa, and the tensile strength can reach 270 Mpa.
Disclosure of Invention
The invention provides a production method of a continuous glass fiber board reinforced plastic instrument board beam assembly, which aims to solve the problems that the rigidity and modal performance of a steering column mounting point of a traditional plastic instrument board beam are difficult to meet requirements, the mass of the plastic instrument board beam containing a metal insert is large, and the light weight of the whole vehicle is not facilitated.
The technical scheme adopted by the invention is as follows: comprises the following steps:
(1) by utilizing a finite element method, based on the working conditions of a mode, the rigidity of a steering column, a static load test, a lateral crushing test and an ODB test, considering space limitation and process limitation, carrying out primary design, and only designing a cross section of a cross beam without arranging rib positions;
(2) carrying out structural topological optimization by using finite element analysis software, wherein the structural topological optimization comprises size optimization and appearance optimization, finding weak parts of structural rigidity, and analyzing and displaying: the rigidity between the mounting bracket at the driving side of the vehicle body and the floor connecting bracket is weaker, and the mounting bracket is reinforced by a cross beam reinforcing plate; smooth transition is realized, so that the stress is uniform; reinforcing ribs are adopted to reinforce the part with weaker rigidity of the bracket;
(3) carrying out finite element analysis again, and using a modeling mode of composite material fiber layering for the beam reinforcing plate to enable the structure to achieve light weight; the structure is optimized in process, so that the injection molding is convenient, and the feasibility of the process of the instrument board assembly is achieved; the mounting point adopts a mode of embedding a threaded sleeve, a riveting nut and a riveting stud in metal, so that the local attaching force is increased;
(4) the mode of injection molding and die pressing is adopted, the main body is made of polyamide 6+ 60% long glass fiber particle materials, the beam reinforcing plate is adopted for local reinforcement, the beam reinforcing plate is placed in a hot-pressing die pressing mold for hot-pressing molding, and the molded beam reinforcing plate, the steering column mounting bracket reinforcing plate and the metal standard component are placed in an injection mold for injection molding, so that the assembly is obtained.
In the step (1), the cross beam has a U-shaped cross section, and the weight of a driving side is higher than that of a member side, so that the cross section of the driving side is larger than that of the member side;
in the step (2), the beam reinforcing plate is a continuous glass fiber plate.
All the reinforcing ribs in the step (2) adopt a crossed mode, so that the bending resistance and torsion resistance effects of the reinforcing ribs are improved in performance, and the flow section of the melt is increased in molding.
In the step (3), the optimized structure adopts an X-direction demolding mode, and a part of the structure adopts an inclined ejection mechanism, so that the realization of an injection molding process is facilitated;
according to the invention, a weak part of the structure is obtained by a finite element topological optimization method, and the full-plastic instrument panel assembly is locally reinforced by utilizing the local reinforcement of the continuous glass fiber plate, so that the stress is uniform, and the stress concentration is reduced; the density of the continuous glass fiber board of the invention is 1700kg/m3Much smaller than steel inserts, light in weight; the continuous glass fiber board can be combined with plastic materialFusion, high reliability; the degree of freedom of plastic part design is high, local reinforcement is carried out according to finite element analysis results, the overall stress is uniform, and the performance is excellent; compared with the full-plastic instrument board beam assembly and the instrument board beam assembly with the metal insert, the beam assembly has the advantages of excellent performance, light weight and easy structure realization.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a rear view of FIG. 1;
FIG. 3 is an enlarged cross-sectional view of a portion of FIG. 1;
in the figure: the automobile body control module comprises an automobile body driving side mounting bracket 1, an automobile body control module bracket 2, a cross beam 3, a cross beam reinforcing plate 4, a boundary line 5 of a continuous fiber plate and plastics, a front wall mounting point I6, an instrument panel mounting point 7, a front wall mounting point II 8, a floor connecting bracket 9, a steering column mounting bracket 10, a steering column mounting bracket reinforcing plate 11, a glove box mounting bracket 12, a passenger side air bag connecting bracket 13 and an automobile body member side mounting bracket 14.
Detailed Description
Comprises the following steps:
(1) by utilizing a finite element method, based on the working conditions of a mode, the rigidity of a steering column, a static load test, a lateral crushing test and an ODB test, considering space limitation and process limitation, carrying out primary design, and only designing the cross section of the cross beam 3 without arranging a rib position; the cross beam 3 has a U-shaped section, and the weight of the driving side is more stressed than that of the member side, so that the section of the driving side is larger than that of the member side;
(2) carrying out structural topological optimization by using finite element analysis software CATIA (computer-graphics aided three-dimensional Interactive application), including size optimization and appearance optimization, finding weak parts of structural rigidity, and analyzing and displaying: the rigidity between the mounting bracket 2 at the driving side of the vehicle body and the floor connecting bracket 10 is weaker, the reinforcing bracket is reinforced by a beam reinforcing plate 4, the beam reinforcing plate 4 adopts a continuous glass fiber plate to realize smooth transition and enable stress to be uniform, the continuous glass fiber plate is a thermoplastic material reinforced in a continuous fiber weaving mode, a base material is polyamide 6, the thickness is 1mm, the elastic modulus is 18000Mpa, and the tensile strength can reach 270 Mpa; as shown in fig. 3; reinforcing ribs are adopted to reinforce the part with weaker rigidity of the bracket, all the reinforcing ribs adopt a crossed mode, the bending resistance and torsion resistance effects of the bracket are improved in performance, and the flow section of the melt is increased in molding;
(3) carrying out finite element analysis again, and using a modeling mode of composite material fiber layering for the beam reinforcing plate 4 to enable the structure to achieve light weight; the structure is optimized in process, injection molding is convenient, the optimized structure adopts an X-direction demolding mode, and a part of structure adopts an inclined ejection mechanism, so that the injection molding process is convenient to realize, and the feasibility of the process of the instrument panel assembly is realized;
the mounting point adopts a mode of embedding a threaded sleeve, a riveting nut and a riveting stud in metal, so that the local attaching force is increased;
(4) adopting a mode of injection molding and die pressing, wherein a main material adopts polyamide 6+ 60% long glass fiber particle material, a beam reinforcing plate 4 is adopted for local reinforcement, the beam reinforcing plate 4 is placed in a hot-pressing die pressing mould for hot-press molding, and the molded beam reinforcing plate 4, a steering column mounting bracket reinforcing plate 11, a metal standard part front wall mounting point I6, an instrument panel mounting point 7 and a front wall mounting point II 8 are placed in an injection mould for injection molding to obtain an assembly, as shown in figures 1, 2 and 3;
because the base material of the continuous fiber board is polyamide 6, the base material is fused with the main material polyamide 6 into a whole after injection molding, the average thickness is 3.5mm, and the elastic modulus of the continuous glass fiber board reaches 18000MPa, the tensile strength is 270MPa, and the continuous glass fiber board has higher rigidity and strength.
Compared with the original steel instrument board beam welding assembly, the whole vehicle collision performance parameter has the numerical value change range within 1% in the real vehicle state, the bench test of the instrument board assembly ensures that the rigidity of the steering column reaches the performance of the original steel instrument board beam welding assembly, the mode is greatly improved, and resonance is not generated.
Claims (5)
1. A method for producing a continuous glass fiber board reinforced plastic instrument board beam assembly is characterized by comprising the following steps:
(1) by utilizing a finite element method, based on the working conditions of a mode, the rigidity of a steering column, a static load test, a lateral crushing test and an ODB test, considering space limitation and process limitation, carrying out primary design, and only designing a cross section of a cross beam without arranging a rib position;
(2) and (2) carrying out structural topology optimization by using finite element analysis software, wherein the structural topology optimization comprises size optimization and appearance optimization, finding weak parts of structural rigidity, and analyzing and displaying: the rigidity between the mounting bracket at the driving side of the vehicle body and the floor connecting bracket is weaker, and the mounting bracket is reinforced by a cross beam reinforcing plate; smooth transition is realized, stress is uniform, and the part with weaker rigidity of the bracket is reinforced by the reinforcing rib;
(3) carrying out finite element analysis again, and using a modeling mode of composite material fiber layering for the beam reinforcing plate 4 to enable the structure to achieve light weight; the structure is optimized in process, so that injection molding is facilitated, and the feasibility of the process of the instrument board assembly is achieved; the mounting point adopts a mode of embedding a threaded sleeve, a riveting nut and a riveting stud in metal, so that the local attaching force is increased;
(4) the mode of injection molding and die pressing is adopted, the main body is made of polyamide 6+ 60% long glass fiber particle materials, the beam reinforcing plate is adopted for local reinforcement, the beam reinforcing plate is placed in a hot-pressing die pressing mold for hot-pressing molding, and the molded beam reinforcing plate, the steering column mounting bracket reinforcing plate and the metal standard component are placed in an injection mold for injection molding, so that the assembly is obtained.
2. The method for manufacturing a cross member assembly of a continuous glass fiber board reinforced plastic instrument panel according to claim 1, wherein in the step (1), the cross member has a U-shaped cross section, and the weight of the driver side is more stressed than that of the member side, so that the cross section of the driver side is larger than that of the member side.
3. The method of claim 1, wherein said step (2) is performed by taking continuous glass fiber board as said beam stiffener.
4. The method for manufacturing a cross member assembly of instrument panel of continuous glass fiber board reinforced plastic as claimed in claim 1, wherein all the reinforcing ribs in step (2) are crossed to improve the bending and torsion resistance and increase the flow cross section of the melt.
5. The method for producing the continuous glass fiber plate reinforced plastic instrument panel beam assembly as claimed in claim 1, wherein the optimized structure in the step (3) adopts an X-direction demolding mode, and a part of the structure adopts a pitched roof mechanism, so that the realization of an injection molding process is facilitated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911057552.5A CN111216378A (en) | 2019-10-31 | 2019-10-31 | Production method of continuous glass fiber board reinforced plastic instrument board beam assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911057552.5A CN111216378A (en) | 2019-10-31 | 2019-10-31 | Production method of continuous glass fiber board reinforced plastic instrument board beam assembly |
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| CN111216378A true CN111216378A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911057552.5A Pending CN111216378A (en) | 2019-10-31 | 2019-10-31 | Production method of continuous glass fiber board reinforced plastic instrument board beam assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112464382A (en) * | 2020-11-30 | 2021-03-09 | 奇瑞汽车股份有限公司 | Automobile instrument board beam size optimization design method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424371A (en) * | 2013-08-29 | 2015-03-18 | 北汽福田汽车股份有限公司 | Method for building conceptual design model of white automobile body |
| CN109720419A (en) * | 2019-02-22 | 2019-05-07 | 广州市银宝山新汽车零部件有限公司 | Dashboard cross member and preparation method thereof |
-
2019
- 2019-10-31 CN CN201911057552.5A patent/CN111216378A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424371A (en) * | 2013-08-29 | 2015-03-18 | 北汽福田汽车股份有限公司 | Method for building conceptual design model of white automobile body |
| CN109720419A (en) * | 2019-02-22 | 2019-05-07 | 广州市银宝山新汽车零部件有限公司 | Dashboard cross member and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112464382A (en) * | 2020-11-30 | 2021-03-09 | 奇瑞汽车股份有限公司 | Automobile instrument board beam size optimization design method |
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Application publication date: 20200602 |
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