CN204043886U - For the car model of wind tunnel test - Google Patents

For the car model of wind tunnel test Download PDF

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Publication number
CN204043886U
CN204043886U CN201420418967.7U CN201420418967U CN204043886U CN 204043886 U CN204043886 U CN 204043886U CN 201420418967 U CN201420418967 U CN 201420418967U CN 204043886 U CN204043886 U CN 204043886U
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China
Prior art keywords
car
wind tunnel
tunnel test
vehicle frame
resin
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CN201420418967.7U
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Chinese (zh)
Inventor
王秀婷
张殿敏
肖秋英
郭志芳
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Tianjin Boxin Automotive Parts Co Ltd
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Tianjin Boxin Automotive Parts Co Ltd
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Abstract

The utility model discloses a kind of car model for wind tunnel test, relates to automobile wind tunnel test technical field, solves the problem that cost is high, precision is low of automobile wind tunnel test model of the prior art.In the utility model, the described car model for wind tunnel test, comprises vehicle frame, described vehicle frame covers and is fixed with Car body model; Described Car body model comprises the froth bed be fixedly connected with vehicle frame and the resin bed be laid on described froth bed; Described resin bed is for processing the external overall structure of described Car body model.The utility model is mainly used in the model production of wind tunnel test.

Description

For the car model of wind tunnel test
Technical field
The utility model relates to automobile wind tunnel test technical field, particularly relates to a kind of car model for wind tunnel test.
Background technology
Automobile wind tunnel test, refer to arrangement car model in wind-tunnel (being used for producing the pipeline of man-made airflow/artificial wind), thus the interaction of learning gas flowing and car model, and then a kind of aerodynamic experiment method of the air dynamic behaviour of understanding (entity) automobile.
Particularly, car model (normally the scale model of ratio 1:5) wind tunnel test is mainly used in the development in early stage in automobile research process, its objective is aerodynamic force, pressure distribution, the data such as noise and the distribution of tailstock local pressure that measured automobiles model is subject to, thus be the optimization molding in Automobile Design process, reduction oil consumption, improve vehicle safety and control stability, and control vehicle inner air and outer air kinetic noise etc. direct authentic data support is provided.Content due to, wind tunnel test mainly comprises dynamometer check to car model, manometric test and the test of tailstock pressure distribution and noise fest etc., therefore tests and requires higher to the physical dimension precision of model and structural strength etc.; And due to the restriction of testing equipment, require that the quality control of model is within 130kg.
At present, for the car model of wind tunnel test in prior art, it makes material by higher Dai Mu and ABS (Acrylonitrile Butadiene Styrene Copolymers, vinyl cyanide, butadiene and the cinnamic multipolymer) plastics of cost.Because the specification of Dai Mu and ABS plastic is limited, all cannot reach the demand of whole vehicle model, therefore pattern assembly is needed to be divided into some modules (such as, front bumper, beater or beat-up cover module, car door gusset lower module, vehicle door side upper part and roof module, body tail module, tire etc.), carry out after piecemeal processing installing, debugging the whole model of formation, cause the precision of the automobile wind tunnel test model of Dai Mu and ABS plastic material lower, and cost is higher.
Utility model content
The utility model provides a kind of car model for wind tunnel test, solves the problem that cost is high, precision is low of automobile wind tunnel test model of the prior art.
For achieving the above object, the utility model adopts following technical scheme:
For a car model for wind tunnel test, comprise vehicle frame, described vehicle frame covers and is fixed with Car body model; Described Car body model comprises the froth bed be fixedly connected with vehicle frame and the resin bed be laid on described froth bed; Described resin bed is for processing the external overall structure of described Car body model.
Wherein, the foam of described froth bed is polyurethane; The resin of described resin bed is curable paste resin.
Particularly, the thickness of described resin bed is 5-15 millimeter.
Further, be provided with sheet metal layer between described froth bed and described vehicle frame, described sheet metal layer is laid along described vehicle frame profile laminating and fixes; Described froth bed sticks on described sheet metal layer.
Preferably, described sheet metal layer is plank or the bamboo slab rubber of thickness 5-10 millimeter; Described plank or between bamboo slab rubber and described vehicle frame screw thread and or rivet interlacement.
During practical application, dismountable reference block be respectively equipped with for locating on any three the described installing plates in four tire installing plates of described vehicle frame; Three described reference blocks for processing datum hole on described tire installing plate.
Wherein, the material of described reference block is paste resin or atomized ash.
Particularly, on described paste resin after hardening, be provided with dismountable vehicle body supplementary structure part in corresponding position.
During practical application, described vehicle frame comprises many hollow square tubes or hollow round steel pipe; Be fixedly connected by welding between many pipes.
Wherein, described froth bed is the splicing of multiple foam module and one machine-shaping setting; And described froth bed is the vehicle body shape of bottom hollow out.
The utility model embodiment provide in the car model of wind tunnel test, comprise and weld the vehicle frame made and the fixing Car body model of upper covering thereof by many hollow square tubes; First Car body model is laid by the profile laminating of plank along vehicle frame and is fixed by rivet interlacement, thus begins to take shape vehicle body shape; Spliced by multiple isocyanurate foam module again, and laminating is pasted onto surrounding and the top surface of plank, is integrally processed to form the vehicle body shape of bottom hollow out; Finally paste resin is laid on outside isocyanurate foam along the vehicle body shaped outer surface of bottom hollow out, after paste resin cure hard, is processed the external overall structure of Car body model by the form of digital control processing, the local feature of refinement simultaneously.Because Car body model adopts hardness high and price is low isocyanurate foam is fixedly connected on vehicle frame, not only ensure that the high rigidity requirement of car model, and reduce cost; In addition, Car body model adopts a small amount of paste resin to be laid on isocyanurate foam outside surface, and by form integrated external overall structure being processed to form Car body model on paste resin of digital control processing, each position of Car body model is made all to be integrated in one, avoid error when installing after pattern assembly is divided into some modules, improve the car load of car model and the precision at details position thereof, make it can improve the data accuracy of wind tunnel test, reduce the use amount of price higher material simultaneously, save the cost of manufacture of car model.Meanwhile, isocyanurate foam density is little, improving the ratio of car model simultaneously, can ensure that its quality meets the requirement at below 130kg; Integratedly on paste resin be processed to form car model, can debugging cycle be effectively reduced, shorten the whole development cycle of car model.
Accompanying drawing explanation
The sectional view of a kind of car model for wind tunnel test that Fig. 1 provides for the utility model embodiment;
The body frame structure for automotive figure of the car model for wind tunnel test that Fig. 2 provides for the utility model embodiment;
The another kind that Fig. 3 provides for the utility model embodiment is for the sectional view of the car model of wind tunnel test;
The schematic diagram of the car model for wind tunnel test that Fig. 4 provides for the utility model embodiment;
The whole development process flow diagram of the car model for wind tunnel test that Fig. 5 provides for the utility model embodiment.
In figure, 1 be vehicle frame, 11 be hollow square tube, 12 for tire installing plate; 2 is Car body model; 3 is froth bed; 4 is resin bed; 5 is sheet metal layer; 6 is vehicle body supplementary structure part.
Embodiment
Below in conjunction with accompanying drawing, a kind of car model for wind tunnel test of the utility model embodiment is described in detail.
A kind of car model for wind tunnel test that the utility model embodiment provides, as shown in Figure 1, comprises vehicle frame 1, vehicle frame 1 covers and is fixed with Car body model 2; Car body model 2 comprises the froth bed 3 be fixedly connected with vehicle frame 1 and the resin bed 4 be laid on froth bed 3; Resin bed 4 is for processing the external overall structure of Car body model.
The utility model provide in the car model of wind tunnel test, comprise the Car body model that vehicle frame and upper covering thereof are fixing, because Car body model adopts hardness high and price is low froth bed is fixedly connected on vehicle frame, not only ensure that the high rigidity requirement of car model, and reduce cost; In addition, Car body model adopts a small amount of resin bed to be laid on froth bed outside surface, and by the form integrated external overall structure being processed to form Car body model on the resin layer of digital control processing, each position of Car body model is made all to be integrated in one, avoid error when installing after pattern assembly is divided into some modules, improve the car load of car model and the precision at details position thereof, make it can improve the data accuracy of wind tunnel test, reduce the use amount of price higher material simultaneously, save the cost of manufacture of car model.
During practical application, in order to car model is made hollow structure, as depicted in figs. 1 and 2, vehicle frame 1 can be fixedly connected be made by welding or bolted mode by many hollow square tubes 11, thus on the basis that ensure that vehicle frame 1 intensity, carry out light-weight design.Particularly, the material of hollow square tube 11 can be square steel, and the size of each hollow square tube 11 can be 30mm*30mm*1mm.
Wherein, in order to fixed foam layer 3 preferably, as shown in Figure 3, sheet metal layer 5 can be provided with between vehicle frame 1 and froth bed 3, this sheet metal layer 5 is laid along the profile laminating of vehicle frame 1 and is fixed by rivet interlacement, thus begin to take shape vehicle body shape, to facilitate the follow-up laying of carrying out froth bed 3 and resin bed 4 and fixing.Wherein, sheet metal layer 5 can be preferably conventional plank material, and concrete thickness can be 5 millimeters.
Particularly, in order to ensure the bulk strength of car model, alleviate its weight, as shown in Figure 3, froth bed 3 can select that hardness is high, density is little and the polyurethane material that price is lower simultaneously.Wherein, multiple isocyanurate foam module splicing, and laminating is pasted onto surrounding and the top surface of sheet metal layer 5, be more integrally processed to form the vehicle body shape of bottom hollow out.
Further, in order to make the external overall structural integrity of car model integrated, to improve the precision at car load and details position thereof, as shown in figures 1 and 3, resin bed 4 can select hardness high and the lower curable paste resin of price.Paste resin is laid on outside froth bed 3 along the vehicle body shaped outer surface of bottom hollow out, after 12 hours paste resin cure hard, again by resin bed 4 by the integrated external overall structure processing Car body model of the form of digital control processing, simultaneously refinement local feature.
As the replacement scheme of the car model for wind tunnel test that the utility model embodiment provides, on the intensity basis ensureing vehicle frame 1, it also can be made up of welding such as the hollow round steel pipe of other size, and this is not restricted.In addition, sheet metal layer 5 along vehicle frame 1 profile laminating lay time, also can be connected and fixed by screw thread etc., the material of sheet metal layer 5 also can elect bamboo slab rubber etc. as; Certainly, the material of sheet metal layer 5 and thickness can be also other materials and specification, and such as thickness is 5-10 millimeter etc., and this is not restricted.
It should be noted that herein, integrated the Car body model processed by the form of digital control processing, main body comprises front/rear bumper, cover, beater or beat-up, vent flap, top cover, five, the full car principal character such as empennage, side step on, full car glass.In addition, paste resin is a kind of resin of bi-component, be divided into resin and hardening agent two parts, wherein, resin is the thick matter pasty mass of grey, and hardening agent is the thick matter pasty mass of white, in use, resin and hardening agent are mixed by the ratio of 1:1, and kneading evenly, just can be used for analogue formation after having mixed for grey pasty mass.
During practical application, as Figure 1-3, when welded frame 1, can be located by the mounting hole on the tire installing plate 12 on it and jig, and by modes such as height gauge measurements, with the positional precision of the welding precision and tire mounting hole that ensure vehicle frame 1.
Wherein, as shown in figures 1 and 3, when isocyanurate foam is bonded on plank, the bonding thickness of isocyanurate foam need ensure to be reserved with 30 millimeters of process redundancy, and namely isocyanurate foam laying depth can be 50 millimeters, and the vehicle body thickness be processed to form is 20 millimeters; And when isocyanurate foam is processed into vehicle body shape, carry out Primary Location by the mounting hole on tire installing plate 12.Meanwhile, isocyanurate foam is bonding complete after, need on any three installing plates in four tire installing plates 12, be dismountablely respectively provided with positioning datum block; After isocyanurate foam is processed to form vehicle body, positioning reference holes need be processed on each reference block, be processed into the benchmark of Car body model as follow-up paste resin.
The paste resin pasting 20 mm of thickness is uniformly applied in the isocyanurate foam forming vehicle body shape, and ensure that the thickness of paste resin is even by means such as 20 height platforms and the iron wire detection degree of depth, and after placement makes it harden in 12 hours naturally, by form integrated external overall structure processing Car body model on paste resin of digital control processing, refinement local feature simultaneously (such as, car door seam, middle net etc.).During due to machined polyurethane foam, inwardly be biased 10 millimeters of gained on the basis of basic body model, namely the isocyanurate foam of vehicle body shape is inwardly less 10 millimeters than the size entirety of basic body model, therefore the paste resin outside surface pasted is than outwards biased 10 millimeters, basic body model, namely the process redundancy of paste resin is 10 millimeters, thus the thickness of the outermost layer resin bed 4 of the car model for wind tunnel test that the utility model embodiment provides is 10 millimeters.
Certainly, during practical application, the thickness of resin bed 4 is not restricted to 10 millimeters, can be the arbitrary value within the scope of 5-15 millimeter, or consider according to actual conditions, and resin bed 4 also can be the thickness of other reasonable value.
Particularly, for the ease of processing, the material of the reference block of the car model for wind tunnel test that the utility model embodiment provides can be paste resin, its sectional dimension can be 3cm*3cm, three paste resin positioning datum blocks and on datum hole can form the three-dimensional coordinate system that has X, Y, Z tri-directions.Certainly, this is not restricted for the concrete material of the reference block of the car model for wind tunnel test that the utility model embodiment provides, and also can select the materials such as atomized ash as an alternative.After Car body model machine-shaping, remove three reference blocks on installing plate, to facilitate subsequent installation vehicle body supplementary structure part.
Further, as shown in Figure 4, the corresponding position on the Car body model of curing molding, can dismountable installation vehicle body supplementary structure part 6, to form a complete car model for wind tunnel test.Wherein, vehicle body supplementary structure part 6 comprises, wheel, rearview mirror, luggage carrier and door handle etc., above-described automobile supplementary structure part 6 is the ABS plastic part made separately, the impact that each supplementary structure part produces test findings can be verified separately in wind tunnel test process, thus for the optimization molding in Automobile Design process, reduce oil consumption etc. more authentic datas be provided.After the installation of vehicle body supplementary structure part 6, spray treatment is carried out to whole car model.
The car model for wind tunnel experiment that the utility model provides, the employing of its main body is the structure integral manufacturing of skeleton (vehicle frame), plank, isocyanurate foam and paste resin from inside to outside successively, not only structural strength is high, precision is high, and cost is low, quality is light, therefore may be used for equally in the modelling of the wind tunnel test of aircraft and other machineries.In addition, because the surface strength of paste resin is high, therefore model is in transportation, not easily gouge, damage, thus the transportation cost reduced for the model of wind tunnel test and later maintenance cost.
Wherein, as shown in Figure 5, the model development flow process for wind tunnel test is specifically as follows: first, carries out solution formulation, planning; Then, the design of digital-to-analogue, evaluation and rectification is carried out; Afterwards, carrying out promotes trade and investment determines factory and the processing of PR (Rapid Prototyping, rapid shaping) part; Welding is published picture, and the welding of vehicle frame and tire installing plate; Meanwhile, the buying of square tube, paste resin, isocyanurate foam and plank can be carried out; Again, carry out the installation of plank and the bonding of isocyanurate foam and benchmark and paste, and to isocyanurate foam preparatory processing; Then, carry out paste resin paste and precision processing, and car die repair just with part trial assembly; Finally, carry out the polishing of car mould, spray paint, and evaluate and finishing payment.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.

Claims (10)

1. for a car model for wind tunnel test, it is characterized in that, comprise vehicle frame, described vehicle frame covers and is fixed with Car body model;
Described Car body model comprises the froth bed be fixedly connected with vehicle frame and the resin bed be laid on described froth bed; Described resin bed is for processing the external overall structure of described Car body model.
2. the car model for wind tunnel test according to claim 1, is characterized in that, the foam of described froth bed is polyurethane;
The resin of described resin bed is curable paste resin.
3. the car model for wind tunnel test according to claim 2, is characterized in that, the thickness of described resin bed is 5-15 millimeter.
4. the car model for wind tunnel test according to claim 2, is characterized in that, is provided with sheet metal layer between described froth bed and described vehicle frame, and described sheet metal layer is laid along described vehicle frame profile laminating and fixes;
Described froth bed sticks on described sheet metal layer.
5. the car model for wind tunnel test according to claim 4, is characterized in that, described sheet metal layer is plank or the bamboo slab rubber of thickness 5-10 millimeter;
Described plank or between bamboo slab rubber and described vehicle frame screw thread and or rivet interlacement.
6. the car model for wind tunnel test according to claim 1, is characterized in that, dismountable reference block be respectively equipped with for locating on any three the described installing plates in four tire installing plates of described vehicle frame;
Three described reference blocks for processing datum hole on described tire installing plate.
7. the car model for wind tunnel test according to claim 6, is characterized in that, the material of described reference block is paste resin or atomized ash.
8. the car model for wind tunnel test according to claim 2, is characterized in that, on described paste resin after hardening, is provided with dismountable vehicle body supplementary structure part in corresponding position.
9. the car model for wind tunnel test according to claim 1, is characterized in that, described vehicle frame comprises many hollow square tubes or hollow round steel pipe;
Be fixedly connected by welding between many pipes.
10. the car model for wind tunnel test according to claim 1 or 9, is characterized in that, described froth bed is the splicing of multiple foam module and one machine-shaping is arranged;
And described froth bed is the vehicle body shape of bottom hollow out.
CN201420418967.7U 2014-07-28 2014-07-28 For the car model of wind tunnel test Active CN204043886U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108061637A (en) * 2017-11-30 2018-05-22 中国商用飞机有限责任公司 Wind tunnel test rectification part, pant device and its shaping and assembly method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108061637A (en) * 2017-11-30 2018-05-22 中国商用飞机有限责任公司 Wind tunnel test rectification part, pant device and its shaping and assembly method

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