CN111469936A - Composite front floor single bottom plate of passenger car and preparation method thereof - Google Patents
Composite front floor single bottom plate of passenger car and preparation method thereof Download PDFInfo
- Publication number
- CN111469936A CN111469936A CN202010339084.7A CN202010339084A CN111469936A CN 111469936 A CN111469936 A CN 111469936A CN 202010339084 A CN202010339084 A CN 202010339084A CN 111469936 A CN111469936 A CN 111469936A
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- CN
- China
- Prior art keywords
- bottom plate
- front floor
- threshold inner
- passenger car
- epoxy resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/043—Superstructures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/046—Combined superstructure and frame, i.e. monocoque constructions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Body Structure For Vehicles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a composite front floor single bottom plate of a passenger vehicle, which is a composite variable-thickness bottom plate, wherein a left side threshold inner plate and a right side threshold inner plate are arranged on the left side and the right side of the single bottom plate, the left bottom plate is positioned on the right side of the left side threshold inner plate, the right bottom plate is positioned on the left side of the right side threshold inner plate, a central channel is arranged between the left bottom plate and the right bottom plate, and a central control box mounting plate is arranged above the central channel. The composite material front floor single bottom plate designed by the structure of the invention utilizes the characteristics of easy integration, large-scale manufacture, small curing shrinkage rate and low linear expansion rate of the composite material, and is cured and formed on a single mould pressing mould once through the variable thickness structural design of the composite material, thereby improving the dimensional precision and appearance integrity of the assembly, greatly reducing the weight of the bottom plate, and reducing the number of moulds, tools and check tools, thereby reducing the assembly manufacturing cost.
Description
Technical Field
The invention relates to the field of design of automobile bearing type automobile body structures, in particular to a composite front floor single bottom plate of a passenger car and a preparation method thereof.
Background
The traditional metal front floor bottom plate is generally formed by welding a split type left bottom plate, a central channel and a right bottom plate. Because each split body needs to be punched and formed by a metal die, and then the split bodies need to be welded into an integral bottom plate assembly, the used punching dies, assembly tools and detection tools have more quantity, the appearance integrity is poor, and the manufacturing cost is high; in addition, the assembly tolerance is accumulated for many times, which causes the reduction of the dimensional accuracy of the product.
The traditional automobile front floor is of a metal structure, usually a metal plate with the same thickness is adopted, a left bottom plate, a central channel and a right bottom plate are formed by stamping through a sheet metal die, and then a central control box mounting plate (also called a central channel reinforcing plate) is welded to form an integral bottom plate. With the national requirements of energy conservation and emission reduction of automobiles, automobile parts are gradually designed in a lightweight way by adopting new materials. The adoption of advanced composite material parts is a main direction of automobile lightweight design.
Disclosure of Invention
The purpose of this project is to provide a front floor bottom plate structure that adopts the lightweight of composite material design.
The invention is realized by the following technical scheme.
The utility model provides a passenger car combined material front floor single bottom plate, single bottom plate 1 is combined material variable thickness bottom plate, and it includes left side threshold inner panel 2, right side threshold inner panel 3, left bottom plate 4, right bottom plate 5, central channel 6 and central control box mounting panel 7 of integrated structural design, left side threshold inner panel 2, right side threshold inner panel 3 set up at two left and right avris of single bottom plate 1, and left bottom plate 4 is located the right side of left side threshold inner panel 2, and right bottom plate 5 is located the left side of right side threshold inner panel 3, is central channel 6 between left bottom plate 4, the right bottom plate 5, central channel 6 top is central control box mounting panel 7.
The invention also provides a preparation method of the composite material front floor single bottom plate of the passenger car, and the single bottom plate 1 is manufactured by adopting a composite material mould pressing process.
Specifically, the composite material is a carbon fiber epoxy resin prepreg.
Specifically, the carbon fiber epoxy resin prepreg is prepared by the following method: adding 4-8% of curing agent and 4-8% of accelerator into 30-40% of liquid epoxy resin by mass, mixing and stirring uniformly, then immersing the carbon fiber bundles into the mixed solution of epoxy resin for 10-20min, extruding the resin on the surface, and drying to obtain the carbon fiber epoxy resin prepreg.
Specifically, the curing agent is any one of diamino diphenyl sulfone or dicyandiamide.
Specifically, the accelerator is any one of dimethylphenyl urea and dimethyl imidazole urea.
Specifically, the die pressing process comprises the following steps: adding the carbon fiber epoxy resin prepreg into the preheated mold, pressurizing to enable the carbon fiber epoxy resin prepreg to fill the cavity of the mold, then adopting a 1500-ton molding press, carrying out heat preservation treatment at the curing temperature of 118-122 ℃ for 25-35min, and then demolding to obtain the monomer bottom plate 1.
According to the technical scheme, the beneficial effects of the invention are as follows:
the composite material front floor single bottom plate designed by the structure of the invention utilizes the characteristics of easy integration, large-scale manufacture, small curing shrinkage rate and low linear expansion rate of the composite material, and is cured and formed on a single mould pressing die once through the variable thickness structural design of the composite material, thereby saving the welding process and improving the manufacturing efficiency. This monomer bottom plate structure can accomplish whole bottom plate structure functions, can integrate threshold inner panel, well accuse case mounting panel again, improves assembly size precision and appearance integrality simultaneously, reduces bottom plate weight by a wide margin, reduces the quantity of mould, frock and utensil to reduce assembly manufacturing cost.
Drawings
Fig. 1 is a schematic view of the entire structure of the single base plate 1.
Fig. 2 is a schematic view of the thickness-variable structure of the cell substrate 1 (section of fig. 1A-a).
Reference numerals: the structure comprises a single bottom plate-1, a left side threshold inner plate-2, a right side threshold inner plate-3, a left bottom plate-4, a right bottom plate-5, a central channel-6 and a central control box mounting plate-7.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
A composite front floor single bottom plate of a passenger car is disclosed, wherein the single bottom plate 1 is a composite variable-thickness bottom plate, wherein FIG. 1 is a schematic overall structure of the single bottom plate 1, FIG. 2 is a schematic variable-thickness structure (section of FIG. 1A-A) of the single bottom plate 1, and the composite front floor of the passenger car is formed by the single bottom plate 1.
The single bottom plate 1 integrates the left side threshold inner plate 2, the right side threshold inner plate 3, the left bottom plate 4, the right bottom plate 5, the central channel 6 and the central control box mounting plate 7 into a single integral bottom plate, so that the dimensional accuracy and the appearance integrity of the assembly are improved, the number of dies, tools and detecting tools is reduced, and the assembly and manufacturing cost is reduced.
In this embodiment, left side threshold inner panel 2, right side threshold inner panel 3 set up at two left and right avris of monoblock bottom plate 1, and left bottom plate 4 is located the right side of left side threshold inner panel 2, and right bottom plate 5 is located the left side of right side threshold inner panel 3, is central channel 6 between left bottom plate 4, the right bottom plate 5, central channel 6 top is well accuse case mounting panel 7, and this structural design can accomplish all passenger car front floor plate structure functions, can integrate threshold inner panel, well accuse case mounting panel again, and the practicality is strong.
Example 2
The embodiment also provides a preparation method of the composite front floor single bottom plate of the passenger car, and the single bottom plate 1 is manufactured by adopting a composite material mould pressing process.
In the embodiment, the composite material is a carbon fiber epoxy resin prepreg (ACTECH1201/SYT45, manufactured by Middling composite materials, Inc.), the carbon fiber epoxy resin prepreg has the characteristics of easiness in integration, large-scale manufacturing, small curing shrinkage rate and low linear expansion rate, and through the design of a variable-thickness structure, the carbon fiber epoxy resin prepreg is cured and formed on a single mould pressing die at one time, so that a welding process is omitted, the manufacturing efficiency is improved, and the weight of the base plate is greatly reduced.
The carbon fiber epoxy resin prepreg is prepared by the following method: adding 6 mass percent of curing agent and 6 mass percent of accelerant into liquid epoxy resin with the mass fraction of 35%, mixing and stirring uniformly, then immersing the carbon fiber bundles into the mixed solution of the epoxy resin for 15min, extruding the resin on the surface, and drying to obtain the carbon fiber epoxy resin prepreg.
In this embodiment, the curing agent is dicyandiamide and the accelerator is dimethylphenyl urea.
In this embodiment, the molding process is: adding the carbon fiber epoxy resin prepreg into the preheated mold, pressurizing to enable the carbon fiber epoxy resin prepreg to fill the cavity of the mold, then adopting a 1500-ton molding press, carrying out heat preservation treatment at the curing temperature of 120 ℃ for 30min, and demolding to obtain the monomer bottom plate 1.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.
Claims (7)
1. The utility model provides a passenger car combined material front floor single bottom plate, a serial communication port, single bottom plate (1) is combined material variable thickness bottom plate, and it includes left side threshold inner panel (2), right side threshold inner panel (3), left bottom plate (4), right bottom plate (5), central channel (6) and central control box mounting panel (7) of integrated structure design, left side threshold inner panel (2), right side threshold inner panel (3) set up at left and right two avris of single bottom plate (1), and left bottom plate (4) are located the right side of left side threshold inner panel (2), and right bottom plate (5) are located the left side of right side threshold inner panel (3), are central channel (6) between left bottom plate (4), right bottom plate (5), central control box mounting panel (7) are held in the top to central channel (6).
2. A method for manufacturing a composite front floor monoblock floor of a passenger car according to claim 1, characterized in that the monoblock floor (1) is manufactured by a composite molding process.
3. The method for preparing the composite front floor single bottom plate of the passenger car according to claim 2, wherein the composite material is carbon fiber epoxy resin prepreg.
4. The method for preparing the composite material front floor single bottom plate of the passenger car according to claim 3, characterized in that the carbon fiber epoxy resin prepreg is prepared by the following method: adding 4-8% of curing agent and 4-8% of accelerator into 30-40% of liquid epoxy resin by mass, mixing and stirring uniformly, then immersing the carbon fiber bundles into the mixed solution of epoxy resin for 10-20min, extruding the resin on the surface, and drying to obtain the carbon fiber epoxy resin prepreg.
5. The method for preparing the composite material front floor monomer bottom plate of the passenger car as claimed in claim 4, wherein the curing agent is one of diaminodiphenyl sulfone or dicyandiamide.
6. The method for preparing a composite front floor monomer bottom plate for a passenger car according to claim 4, wherein the accelerator is any one of dimethylphenyl urea and dimethylimidazole urea.
7. The preparation method of the composite material front floor single bottom plate of the passenger car as claimed in claim 2, wherein the molding process is as follows: adding the carbon fiber epoxy resin prepreg into the preheated mold, pressurizing to enable the carbon fiber epoxy resin prepreg to fill the cavity of the mold, then adopting a 1500-ton molding press, carrying out heat preservation treatment at the curing temperature of 118-122 ℃ for 25-35min, and then demolding to obtain the monomer bottom plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339084.7A CN111469936A (en) | 2020-04-26 | 2020-04-26 | Composite front floor single bottom plate of passenger car and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339084.7A CN111469936A (en) | 2020-04-26 | 2020-04-26 | Composite front floor single bottom plate of passenger car and preparation method thereof |
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| Publication Number | Publication Date |
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| CN111469936A true CN111469936A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010339084.7A Pending CN111469936A (en) | 2020-04-26 | 2020-04-26 | Composite front floor single bottom plate of passenger car and preparation method thereof |
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| CN (1) | CN111469936A (en) |
Citations (16)
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-
2020
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Application publication date: 20200731 |