CN101336172A

CN101336172A - Automobile impact beam with integrated brackets and the manufacturing method thereof

Info

Publication number: CN101336172A
Application number: CNA2006800522541A
Authority: CN
Inventors: 李垠雨
Original assignee: DONGWON METAL IND Co Ltd
Current assignee: DONGWON METAL IND Co Ltd
Priority date: 2006-02-02
Filing date: 2006-04-04
Publication date: 2008-12-31
Also published as: KR20070079469A; KR100805747B1

Abstract

The invention discloses an automobile impact beam integrated with brackets which are fastened to an automobile and a method of manufacturing the automobile impact beam. The automobile impact beam according to the invention includes a body formed from a central area of a hollow steel pipe, and brackets formed from opposite ends of the hollow steel pipe extending from opposite sides of the body, through flattening, so that the brackets are formed as flat surfaces integrated with the body. The invention allows the impact beam to be easily manufactured and mounted to a vehicle, reduces the weight of the vehicle, and provides stability to a passenger.

Description

With integrally formed automobile impact beam of support and manufacture method thereof

Technical field

The present invention relates in general to automobile impact beam, and more specifically, relates to a kind of and the integrally formed automobile impact beam that is fastened to automobile of support, and relates to the manufacture method of this automobile impact beam.

Background technology

At present, worldwide automaker has installed for example steel reinforcement of impact beam in car door, to improve the rigidity of automobile.

In the type of the steel reinforcement that is used for automobile, impact beam is installed between the inner panel and outside plate of arrangements for automotive doors 5, as shown in Figure 1.In this way the impact beam of An Zhuaning minimized because between the automobile in the distortion and the damage of the car body that collision caused of Width, therefore minimized the injury to chaufeur or passenger.

As mentioned above, the impact beam that is used for automobile is made by high tensile steel plate usually, and this steel plate forms has wave shape.Yet, come in for realizing the lightweight of automobile and the fuel efficiency that improves automobile, use hollow steel tube to make impact beam to have the ability that high resistance to impact and excellent absorption are collided.

Fig. 2 shows the transparent view of conventional impact beam, and this conventional impact beam is constructed as described above and disclosed in the open No.1994-3248 of Korean Patent.

As shown in Figure 2, use the impact beam 1 of the routine of hollow steel tube manufacturing to comprise main body 2, main body 2 comprises hollow steel tube.Support 3 and 4 is arranged on the opposite end of main body 2, and is attached to the inner panel of car door 5 or the inside face of outside plate.Usually, after having made support 3 and 4, support 3 and 4 is welded to main body 2 by other manufacturing operation.

Promptly, being used for the problem that the impact beam 1 of the routine of automobile had is, at least two supports 3 and 4 must be made dividually impact beam 1 is attached to the inboard of arrangements for automotive doors 5, make the operation of welding support must be increased in the Automobile manufacturing process, therefore do not increased the number of operating sequence with being hoped.Further, since the deformation effect that causes of welding operation the quality and the rigidity of product.In addition, support 3 and 4 is installed dividually, has therefore increased the weight of automobile.

Summary of the invention

Technical assignment to be solved by this invention

Therefore, consider the above problem that takes place in the prior art and made the present invention, and the purpose of this invention is to provide method with integrally formed automobile impact beam of support and manufacturing impact beam, wherein, the zone that has formed the hollow steel tube of support is unfolded by compacting or hydraulic forming, and the main body of support and impact beam is whole formation by suppressing, and therefore increased the intensity of impact beam, reduced the weight of automobile and manufacturing easily.

Technical scheme

For realizing this purpose, the invention provides a kind of and the integrally formed automobile impact beam of support, impact beam comprise main body that the middle section by hollow steel tube forms and by the relative end of hollow steel tube by flattening the support that (flattening) forms, described relative end is to extend from the opposite side of main body, thereby support forms and the integrally formed flat surfaces of main body.

Each of support all forms in the following way, that is, form in every end of the relative end of hollow steel tube and have the shear zone of predetermined length, and expander is inserted in the opening of every end of relative end of hollow steel tube so that the opening expansion.

Further, every end of the opposed end that extends from the opposite side of main body by the compacting hollow steel tube forms each support.

Main body by heat treatment to gain in strength.

The cross section of hollow steel tube is selected from round section and elliptic cross-section.

Supporting rib is attached to each support, to increase the power that impact beam is connected to automobile.

For realizing this purpose, the invention provides the method made from the integrally formed automobile impact beam of support, method comprises the steps: the heat treatment step of the body region of hollow steel tube, and the relative end of hollow steel tube forms support and the zone between support of hollow steel tube is formed main body; Form step with support, after finishing heat treatment step, by the all-in-one-piece support of opposed end pressing formation with hollow steel tube.

Support forms step and comprises: form the shearing step of shear zone after finishing heat treatment step in the opposed end of hollow steel tube, wherein each shear zone has predetermined length; And expansion step, expander is inserted in the opening with shear zone with the expansion opening, and therefore forms support.

Support forms step and comprises the pressing step, flattens by the opposed end of compacting with hollow steel tube after finishing heat treatment step, therefore forms support.

In support formation step, comprise that further supporting rib forms step, forms supporting rib on the surface of each support.

For finishing this purpose, the invention provides and the integrally formed automobile impact beam of support, this automobile impact beam comprises: main body, made described main body by heat treatment hollow steel tube and the middle section that forms automobile impact beam; And support, be arranged on by expansion on the opposite side of heat-treatment zone of hollow steel tube not by the hot-cured end and suppress this end then and this support be integrally formed on the opposite end of main body.

By utilize hydraulic forming expand hollow steel tube not by hot-cured zone and suppress this then and distinguish and form each support.

For realizing this purpose, the invention provides the method made from the integrally formed automobile impact beam of support, method comprises the steps: heat treatment step, to the formation of hollow steel tube the zone of impact beam main body heat-treat; Expansion step, the expansion hollow steel tube be different from other zones that formed the zone of main body by heat treatment; Form step with support, the zone that utilizes expansion step to expand by compacting forms and the integrally formed support in heat-treatment zone.

Support forms step and further comprises cutting step, when the rack area between execution heat treatment at least two districts at hollow steel tube and the expansion heat-treatment zone, and the rack area of cutting expansion.

Support forms step and comprises that further supporting rib forms step, forms supporting rib on the surface of each support that forms by compacting.

Beneficial effect

As mentioned above, the impact beam that is used for vehicle (automobile) according to the present invention is manufactured to, and the feasible zone that has formed the member of support is cut and is pressed then, or is expanded by hydraulic forming, therefore be cut and be pressed then, and support and impact beam integral body form single structure.Consequently, the fitting operation that the support of separately making is installed to the main body of impact beam does not need, and has therefore minimized number of parts and manufacturing and the desired cycle of operations of assembling impact beam.

In addition,, handle hollow steel tube, make that resistance to impact and the ability that absorbs collision are improved, therefore improved stability and realized lightweightly, therefore maximized fuel efficiency by heat treatment at the impact beam that is used for automobile according to the present invention.

Description of drawings

Fig. 1 shows the view that the conventional impact beam that is used for automobile is installed to the residing state of arrangements for automotive doors;

Fig. 2 shows the transparent view of the conventional impact beam that is used for automobile;

Fig. 3 shows according to the embodiment of the invention and the transparent view integrally formed automobile impact beam of support;

Fig. 4 shows manufacturing according to the diagram of circuit embodiment of the invention and the method integrally formed automobile impact beam of support;

Fig. 5 shows the transparent view of the impact beam after the heat treatment of having finished Fig. 4;

Fig. 6 shows the transparent view of the impact beam after having finished the shearing step of Fig. 4;

Fig. 7 shows the view of the expansion step of Fig. 4;

Fig. 8 shows the transparent view of the impact beam when supporting rib is arranged on the Manufactured support;

Fig. 9 shows the transparent view according to another and the integrally formed automobile impact beam of support of the present invention;

Figure 10 shows in accordance with another embodiment of the present invention, by expansion and compacting and with the transparent view of the integrally formed automobile impact beam of support;

Figure 11 be illustrate manufacturing in accordance with another embodiment of the present invention, by expansion and compacting and with the diagram of circuit of the method for the integrally formed automobile impact beam of support;

Figure 12 shows the transparent view of hollow steel tube after the heat treatment of Figure 11 is finished, that be used to make impact beam;

Figure 13 show the hollow steel tube after the heat treatment step of Figure 11 is finished formation the parts of support expanded the transparent view of residing state;

Figure 14 shows the transparent view of the part of impact beam after the expansion step of Figure 13 is finished, that have the support that forms by compacting; With

The transparent view of the impact beam when Figure 15 shows on the support after supporting rib is arranged on manufacturing.

The specific embodiment

To be described in detail with reference to the attached drawings the present invention hereinafter.

Fig. 3 shows according to the embodiment of the invention and the transparent view integrally formed automobile impact beam of support.

As shown in Figure 3, comprise hollow steel tube according to the automobile impact beam 10 of the embodiment of the invention, and support 12 ' and 13 ' with the whole formation of the opposed end of hollow steel tube.Be arranged on support 12 ' and 13 ' between the zone formed main body 11.

For reducing the weight of impact beam 10, make impact beam 10 by hollow steel tube.Impact beam 10 is not restricted to specific cross section, and preferably impact beam 10 has circle or plurality of stepped serrations.More preferably, impact beam has plurality of stepped serrations, to have the ability that high resistance to impact and excellent absorption are collided.In addition, main body 11 by heat treatment with maximum rigidity and impact absorption ability.

Hollow steel tube stands to flatten operation, therefore formed support 12 ' and 13 ', make support 12 ' and 13 ' with main body 11 whole formation.Flatten following the carrying out of operation.That is, each shear zone 14 (seeing Fig. 4 to Figure 17) with predetermined length is formed on the longitudinal direction of main body 11 and by expander 15 (see figure 7)s to be expanded, forged then therefore formed support 12 ' and 13 '.As the alternative method of the method, support can form by compacting, and does not need to form shear zone 14, as shown in Figure 9.

For ease of above-described pressing operation, preferably, make support 12 ' with 13 ' not by heat treatment.Yet,, preferably after support forms, heat-treat if require heat treatment.

In addition, for making impact beam 10 easily be attached to vehicle (automobile) and keep attached state securely, supporting rib 16 can be attached to support 12 ' and 13 '.Supporting rib 16 has the shape corresponding to the surface configuration of the vehicle that impact beam is installed (automobile).

Fig. 4 be illustrate manufacturing according to the embodiment of the invention utilizing the shear zone to form step and with the diagram of circuit of the method for the integrally formed automobile impact beam of support, and Fig. 5 to Fig. 8 shows the transparent view of the impact beam of handling according to each step of Fig. 4.

Below will with reference to figure 3 and Fig. 5 to Fig. 8 describe manufacturing according to of the present invention by forming the shear zone with the method for the integrally formed automobile impact beam of support.

Make by forming shear zone 14 as follows with the method for the integrally formed automobile impact beam of support.As shown in fig. 5, in heat treatment step S1, the middle section of the hollow steel tube of the main body 11 that formed impact beam 10 is heat-treated with maximum rigidity and impact absorption ability.Preferably, the opposed

end

12 and 13 of hollow steel tube is not by heat treatment, so that the operation of pressing subsequently.

Then, as shown in fig. 6, shear among the step S2 at rack area, formation shear zone 14 in the

opposed end

12 and 13 of the formation support of hollow steel tube, its mode makes shear zone 14 have predetermined length on the hollow steel tube longitudinal direction.That is, the instrument that has corresponding to the recessed portion of the shape of each shear zone 14 is inserted in the hollow steel tube.In this state, externally suppress projection corresponding to recessed portion, make the part of hollow steel tube be removed, therefore form shear zone 14.

After in step S2, having formed shear zone 14, as shown in Figure 7, in wedge expander 15 has been inserted into wherein forming of hollow steel tube each

end

12 and 13 opening of shear zone 14.Then, press pressing dilator 15 with shear zone 14 expansion, therefore formed support 12 ' and 13 '.Then, in rack area expansion step S3, can additionally carry out forging operation so that surface smoothing.

In step S3, formed support 12 ' and 13 ' after, as shown in Figure 8, supporting rib 16 supporting rib form be attached among the step S4 support 12 ' and 13 ' the surface.Supporting rib 16 is used for securely impact beam 10 being attached to automobile.Therefore, the shape of supporting rib 16 corresponding to the support 12 that is attached with automobile impact beam 10 ' and 13 ' the shape on surface, and be not restricted to the shape of Fig. 8.

Fig. 9 show impact beam 10 according to modification of the present invention ' transparent view.

With reference to figure 9, formed support 13a and on the outer surface of hollow steel tube, do not formed the shear zone by compacting.In this case, by with the overlapping support that forms of the outer surface of hollow steel tube, make the intensity of support double.

The impact beam 10 of Fig. 9 ' situation in, to improve intensity, resistance to impact and impact absorption ability are as shown in Figure 4 by heat treatment for main body 11.Then, carrying out behind the pressing operation, can be used to provide the more attached operation of forging operation, heat treatment operation and supporting rib of flat surfaces.

Figure 10 show in accordance with another embodiment of the present invention by expansion and compacting and with the transparent view of the integrally formed automobile impact beam of support.

As shown in Figure 10, automobile impact beam 100 comprises hollow steel tube in accordance with another embodiment of the present invention.Hollow steel tube formed main body 111 by the hot-cured zone.The opposed end of main body 111 is expanded and is suppressed, therefore formed support 112 ' and 113 '.Therefore, support and main body are integrally formed in the single structure.

For realizing the lightweight of impact beam 100, use hollow steel tube to make impact beam 100.Impact beam is not restricted to specific cross section, and preferably, impact beam has circle or elliptic cross-section.More preferably, impact beam has elliptic cross-section to have high resistance to impact and excellent impact absorption ability.In addition, hollow steel tube corresponding to the zone of main body 111 by heat treatment with maximum rigidity and impact absorption ability.

Then, do not expanded and suppressed, made support 112 ' and 113 ' integrally form with main body 111 by the hot-cured zone.

In detailed description, the formation of hollow steel tube support 112 ' and 113 '

opposed end

112 and 113 and be formed between the heat-treatment zone of hollow steel tube and do not expanded by hydraulic forming or similar operations by hot-cured rack area 114.After finishing expansion, the rack area 114 of expansion is cut along line of cut 115.Then, the expansion regions that is formed by the

opposed end

112 and 113 of heat-treatment zone is pressed, therefore formed support 112 ' and 113 '.

Support 112 ' and 113 ' can be after pressing operation is finished by heat treatment with maximum rigidity and impact absorption ability.In addition, corresponding to the supporting rib 116 on the surface of the vehicle that is attached with impact beam (automobile) can be attached to support 112 ' and 113 ', so that impact beam 100 easily is attached to vehicle (automobile) and keeps attached state securely.

Figure 11 be illustrate manufacturing in accordance with another embodiment of the present invention by expansion and compacting and with the diagram of circuit of the method for the integrally formed impact beam of support, and Figure 12 to Figure 15 shows the transparent view of each state that each step that is used for according to Figure 11 forms the hollow steel tube of impact beam.

Hereinafter, with reference to Figure 10 and Figure 12 to Figure 15 described make according to the another embodiment of the present invention shown in Figure 11 pass through expansion and suppress and with the method for the integrally formed automobile impact beam of support.

Make by expansion and compacting and as follows with the method for the integrally formed automobile impact beam of support.That is, as shown in fig. 11, in heat treatment step S101, the zone of hollow steel tube of main body 111 that has formed impact beam 100 by heat treatment with maximum rigidity and impact absorption ability.Preferably, as previously discussed, the opposed end 112 of hollow steel tube and 113 and be arranged between the heat-treatment zone and not by hot-cured rack area 114 not by heat treatment, so that dilation procedure subsequently.

Figure 12 shows in step S101 by the hot-cured hollow steel tube.Figure 12 a shows the condition of heat treatment when the middle section of hollow steel pipe forms main body 111.Figure 12 b shows the condition of heat treatment when the opposite side of the middle section formation rack area 114 of hollow steel pipe and rack area 114 forms main body 111.

After heat treatment step S101 has stopped, hollow steel tube not by hot-cured

opposed end

112 and 113 and rack area 114 in expansion step S102, expanded by hydraulic forming or similar dilation procedure.

Figure 13 shows the

opposed end

112 and 113 and rack area 114 of hollow steel tube, and they are expanded in step S102 and not by heat treatment.In this case, Figure 13 a shows the end 113 of hollow steel tube by the residing state of expansion.Figure 13 b show hollow steel tube opposed

end

112 and 113 and the rack area 114 of central authorities that is arranged on hollow steel tube by the residing state of expansion.

Therefore when finished dilation procedure in step S102 after, the end of having expanded 112 and 113 is pressed, and has formed support 112 ' and 113 ' (support forms operation).In the situation of rack area, carry out cutting operation along the line of cut 115 at the center of rack area 114 with expansion.The rack area 114 of expansion is cut the

end

112 and 113 with the expansion that forms main body 111, and end 112 and 113 is not by heat treatment.Preferably, rack area 114 be support 112 ' or 113 ' the twice of length, therefore allow to be arranged on and have identical length by cutting by the support on the opposed end of hot-cured main body 111.In this case, cutting operation carries out after can being pressed in step S103 at the rack area 114 of expansion.

Figure 14 show by the compacting among the step S103 with main body 111 integrally formed supports 113 ' view.

After on the opposed end of support 112 ' and 113 ' in step S103, be formed on main body 111, as shown in Figure 15, supporting rib form among the step S104 supporting rib 116 is attached to support 112 ' and 113 ' each surface on.The function of support ribs 116 is securely impact beam 100 to be attached to automobile.For this purpose, the shape of supporting rib 116 is corresponding to each support 112 of automobile impact beam 100 ' or the shape on the 113 ' surface on it to be installed.Therefore, supporting rib 116 can have multiple shape, and is not restricted to the shape of Figure 15.

Industrial applicibility

As mentioned above, the invention enables the impact beam can be easily manufactured, this impact beam be peace Be loaded on car door and can improve for the resistance to impact that acts on the external impact on the vehicle and bump Hit absorbability, and the present invention can be applicable to auto industry.

Claims

One kind with the integrally formed automobile impact beam of support, comprising:

The main body that forms by the middle section of hollow steel tube; With

Support, described support is formed by pressing by the opposed end of described hollow steel tube, and wherein said opposed end extends from the opposite side of described main body, makes described support form and the integrally formed flat surfaces of described main body.
2. automobile impact beam according to claim 1, each of wherein said support forms in the following way, promptly, in each end of the opposed end of described hollow steel tube, form and have the shear zone of predetermined length, and expander is inserted in the opening of each end of opposed end of described hollow steel tube to expand described opening.
3. automobile impact beam according to claim 1, wherein each end of the described opposed end that extends from the opposite side of described main body by suppressing described hollow steel tube forms each described support.
4. according to each described automobile impact beam of claim 1 to 3, wherein said main body by heat treatment to gain in strength.
5. automobile impact beam according to claim 4, the cross section that wherein said hollow steel tube has is selected from round section and elliptic cross-section.
6. automobile impact beam according to claim 5, wherein supporting rib is attached to each described support, to increase the power that described impact beam is connected to automobile.
7. the method for manufacturing and the integrally formed automobile impact beam of support, this method comprises the steps:

Heat treatment step is heat-treated the body region of hollow steel tube, makes the opposed end of described hollow steel tube form described support, and the zone that is between the described support of described hollow steel tube forms main body; With

Support forms step, after finishing described heat treatment step, by the opposed end pressing formation integral type support with described hollow steel tube.
8. method according to claim 7, wherein, described support forms step and comprises:

Shear step, form the shear zone in the opposed end of described hollow steel tube after finishing described heat treatment step, each shear zone has predetermined length; With

Expansion step is inserted into expander in the opening with shear zone expanding described opening, thereby forms described support.
9. method according to claim 7, wherein said support form step and comprise:

Flatten step, after finishing described heat treatment step, flatten by the opposed end of compacting, thereby form described support described hollow steel tube.
10. according to Claim 8 or 9 described methods, wherein said support forms step and further comprises:

Supporting rib forms step, forms supporting rib on the surface of each described support.
11. one kind and the integrally formed automobile impact beam of support comprise:

Main body, it is manufactured by the heat treatment hollow steel tube, and forms the middle section of described automobile impact beam; With

Support, described support be arranged on by expansion on the opposite side of heat-treatment zone of described hollow steel tube and not by the hot-cured end and and then suppress on the opposed end that described end is integrally formed in described main body.
12. automobile impact beam according to claim 11, wherein, by utilize hydraulic forming expand described hollow steel tube not by hot-cured zone and and then suppress this zone, to form each support.
13. automobile impact beam according to claim 12, the cross section that wherein said hollow steel tube has is selected from round section and elliptic cross-section.
14. automobile impact beam according to claim 13, wherein supporting rib is attached to each described support to increase the power that described impact beam is connected to automobile.
15. the method for manufacturing and the integrally formed automobile impact beam of support, this method comprises the steps:

Heat treatment step is heat-treated the zone of the main body of the described impact beam of formation of hollow steel tube;

Expansion step is expanded other zones that form the zone of described main body by described heat treatment that are different from of described hollow steel tube; With

Support forms step, by suppressing through the zone that described expansion step is expanded, to form and the integrally formed support in described heat-treatment zone.
16. method according to claim 15, wherein said support form step and further comprise:

Cutting step, when carrying out rack area between described thermal treatment zone of heat treatment and expansion at least in two zones at described hollow steel tube, the rack area of cutting expansion.
17. according to claim 15 or 16 described methods, wherein said support forms step and further comprises:

Supporting rib forms step, forms supporting rib on the surface of each the described support that forms by compacting.