CN207060169U

CN207060169U - A kind of body of a motor car B posts

Info

Publication number: CN207060169U
Application number: CN201720778397.6U
Authority: CN
Inventors: 江国锋; 刘福强; 张俊杰
Original assignee: Shanghai Superior Die Technology Co Ltd
Current assignee: Shanghai Superior Die Technology Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2018-03-02
Anticipated expiration: 2027-06-30

Abstract

The utility model provides a kind of body of a motor car B posts, and the body of a motor car B posts comprise at least top half and the latter half；Wherein top half is the porous magnesium of fiber doping；The latter half is porous magnesium.Body of a motor car B posts can be provided simultaneously with light weight, high intensity and impact resistance in the application.

Description

A kind of body of a motor car B posts

Technical field

A kind of automobile body part is the utility model is related to, more particularly to a kind of body of a motor car B posts.

Background technology

Automotive light weight technology is with energy crisis and becoming increasingly conspicuous for problem of environmental pollution and gradually by society and portion of government Door concern.Automotive light weight technology is to reduce complete vehicle quality as far as possible under the premise of security is ensured so as to reduce oil consumption, reduce air dirt Dye, increase battery durable ability etc..Car body weight accounts for the 30-40% of whole body of a motor car.Major body lightweight at present is main There is three approach：Structural design optimization, material lightweight and manufacturing process innovation.Wherein, material lightweight is exactly to use The material that density is small, intensity is high, such as aluminium alloy, magnesium alloy, carbon fiber etc..Structural design optimization is exactly rational using some Structure, such as B-pillar structure use mixed structure；Manufacturing process is innovated：Such as replace traditional filler wire welding, riveting with laser welding Deng.In recent years, Mg and its alloy are due to the small (1.8g/cm of its density³), specific strength it is high and as the favorite in automotive light weight technology, Porous magnesium reduce further density, wherein more importantly three-D pore structure has preferable energy absorption.

In automotive body structure, center body pillar extends to car bottom between front door and back door, from roof；It is acted on It is for supporting roof and front and back door and assembling (such as safety belt, electric wire part).When vehicle is hit by from side When hitting, B posts can also play the protective effect to occupant.In order to reach light-weighted purpose, the B posts production of comparative maturity at present Product mainly have two kinds of structures：1) whole thermoforming steel plate materials：Protected using the enough intensity of thermoforming steel plate while loss of weight Demonstrate,prove security；2) top half is thermoforming material, and the latter half is cold punching steel plate composition：Utilize the thermoforming material of top half The energy-absorbing of the intensity of matter and the cold punching plate of the latter half ensures security.But for the relatively light alloys magnesium of material, steel it is close Degree is still larger, therefore develops lighter, the rational in infrastructure B-pillar structure of weight and have larger economic benefit and social value.

Utility model content

In view of the above the shortcomings that prior art, the purpose of this utility model is to provide a kind of body of a motor car B posts, energy Enough it is provided simultaneously with light weight, high intensity and impact resistance.

In order to achieve the above objects and other related objects, the application is achieved through the following technical solutions.

The utility model provides a kind of body of a motor car B posts, and the body of a motor car B posts include top half and the latter half； Wherein top half is the porous magnesium of fiber doping；The latter half is porous magnesium.

In a preferred embodiment, top half accounts for the 1/4~3/4 of the total length of body of a motor car B posts.

It is highly preferred that the porous magnesium of the fiber doping is that metallic fiber is dispersed with porous magnesium.It is described it is scattered can be with For continuous or disperse；Can be that rule distribution can also be discrete distribution.The metallic fiber can be stainless steel fibre or Copper fiber etc..

Weld or rivet between the top half and the latter half.

In a preferred embodiment, the surface of the body of a motor car B posts is provided with protective coating.The protective coating is In order to reach corrosion-resistant purpose, it can use any one of prior art corrosion-inhibiting coating；It can also be formed using anticorrosion process Coating, such as handled using differential arc oxidation.

In a preferred embodiment, a diameter of 0.01~0.1mm of fiber in the porous magnesium that the fiber adulterates.

In one preferably embodiment, the cumulative volume of the fiber is the 5~40% of the top half cumulative volume.

In a preferred embodiment, the length of fiber is 0.01~500mm in the porous magnesium of the fiber doping.

In a preferred embodiment, the porosity of top half is 5~40%.The specific surface area of the top half For 9.8~400m²/g。

In a preferred embodiment, the porosity of the latter half is 45~70%.The ratio surface of the latter half Product is 20~458m²/g。

The porosity refers to the percentage of material void volume and material cumulative volume in its natural state.

In a preferred embodiment, the Breadth Maximum in the hole of porous magnesium is 0.1mm~50mm.Can with the shape in hole Think any shape.Preferably, the hole is shaped as circle.

As described above, a kind of body of a motor car B posts of the present utility model, have the advantages that：Using present techniques Structure described in scheme, can effective automobile lightweight, and it also has high intensity and impact resistance.

Brief description of the drawings

Fig. 1 is shown as the structural representation of body of a motor car B posts in the utility model.

Fig. 2 is shown as the microstructure schematic diagram of the top half of the utility model body of a motor car B posts.

Component label instructions

1 top half

2 the latter half

3 fibers

4 holes

5 magnesium materials

Embodiment

Embodiment of the present utility model is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the present utility model easily.

Fig. 1 is referred to Fig. 2.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only to Coordinate the content disclosed in specification, so that those skilled in the art understands and reads, be not limited to the utility model Enforceable qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or size Adjustment, in the case where not influenceing the effect of the utility model can be generated and the purpose that can reach, all should still fall in the utility model Disclosed technology contents are obtained in the range of covering.Meanwhile in this specification it is cited as " on ", " under ", " left side ", The term on " right side ", " centre " and " one " etc., understanding for narration is merely convenient to, and it is enforceable to be not used to restriction the utility model Scope, its relativeness are altered or modified, enforceable when being also considered as the utility model in the case where changing technology contents without essence Category.

As shown in figure 1, the utility model provides a kind of body of a motor car B posts, the body of a motor car B posts include top half and The latter half；Wherein top half is the porous magnesium of fiber doping；The latter half is porous magnesium.

Porous magnesium in the application can be obtained by all methods that can realize material porous.

The material for being used to be formed porous magnesium in the application includes pure magnesium or magnesium alloy.Its condition of heat treatment can be former Primary state, annealed state, aging state etc. other in order to improve the state of matrix material mechanical property.

On the one hand the body of a motor car B posts prepared using the loose structure in the application can effectively mitigate car body weight, On the other hand impulsive force can effectively be absorbed.

Weld or rivet between the top half and the latter half.Welding is as using spot welding, arc-welding, Laser Welding, rubbed Wipe weldering.

In a preferred embodiment, a diameter of 0.01~0.1mm of fiber in the porous magnesium that the fiber adulterates.Institute It is metallic fiber to state fiber.Such as can be stainless steel fibre or copper fiber.The cumulative volume of fiber is that the top half is overall Long-pending 5~40%.

In a preferred embodiment, the porosity of top half is 5~40%.

In a preferred embodiment, the porosity of the latter half is 45~70%.

In a preferred embodiment, the Breadth Maximum in the hole of porous magnesium is 0.1mm~50mm.Can with the shape in hole Think any shape.

Embodiment one：

Matrix material is Mg-RE alloys, the porosity of the porous magnesium that stainless steel fibre that B post top halfs use is strengthened for 20%, prepared using chemical etching technology, wherein a diameter of 0.05~0.08mm of stainless steel fibre, account for top half totality Long-pending 15%, for the porosity for the porous magnesium that compressive strength 600MPa, B post the latter half uses for 50%, its energy absorption is big Small is 48MJ/m³, top half connected with the latter half using friction spot welding.The structure is with higher mechanical property and preferably Impact resistance, there is potential application value, the porous magnesium of other different sizes and fibre strengthening in body structure The mechanical property of porous magnesium be shown in Table 1.

Embodiment two：

Matrix material is AZ93 magnesium alloys, the porosity of the porous magnesium that copper fiber that B post top halfs use is strengthened for 40%, prepared using chemical etching technology, wherein a diameter of 0.01~0.03mm of copper fiber, the fiber cumulative volume accounts for The 30% of half part cumulative volume, the porosity for the porous magnesium that compressive strength 300MPa, B post the latter half uses for 60%, its Energy absorption size is 55MJ/m³, top half connected with the latter half using laser spot welding.The structure has higher mechanics Performance and preferable impact resistance, there is potential application value in body structure.

In summary, body of a motor car B posts use special loose structure in the utility model, and combine and adulterated in loose structure Fiber, lightweight requirements are finally disclosure satisfy that, and possess high intensity and impact resistance.So effective gram of the utility model Take various shortcoming of the prior art and have high industrial utilization.

Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.

Claims

1. a kind of body of a motor car B posts, it is characterised in that the body of a motor car B posts comprise at least top half (1) and the latter half (2)；Wherein top half (1) is the porous magnesium of fiber (3) doping；The latter half (2) is porous magnesium.

2. body of a motor car B posts according to claim 1, it is characterised in that the porous magnesium of fiber doping is in porous magnesium It is dispersed with metallic fiber (3).

3. body of a motor car B posts according to claim 1, it is characterised in that welded between the top half and the latter half Connect or rivet.

4. body of a motor car B posts according to claim 1, it is characterised in that the surface of the body of a motor car B posts is provided with protection Coating.

5. body of a motor car B posts according to claim 1, it is characterised in that fiber in the porous magnesium of the fiber doping A diameter of 0.01~0.1mm.

6. body of a motor car B posts according to claim 1, it is characterised in that fiber in the porous magnesium of the fiber doping Length is 0.01~500mm.

7. body of a motor car B posts according to claim 1, it is characterised in that the cumulative volume of the fiber is the first half Divide the 5~40% of cumulative volume.

8. body of a motor car B posts according to claim 1, it is characterised in that the porosity of top half is 5~40%.

9. body of a motor car B posts according to claim 1, it is characterised in that the porosity of the latter half is 45~70%.

10. body of a motor car B posts according to claim 1, it is characterised in that the Breadth Maximum in the hole of porous magnesium is 0.1mm ~50mm.