CN106891996A - A kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method - Google Patents
A kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method Download PDFInfo
- Publication number
- CN106891996A CN106891996A CN201710054419.9A CN201710054419A CN106891996A CN 106891996 A CN106891996 A CN 106891996A CN 201710054419 A CN201710054419 A CN 201710054419A CN 106891996 A CN106891996 A CN 106891996A
- Authority
- CN
- China
- Prior art keywords
- thickness
- front longitudinal
- changeover portion
- stage casing
- continuous variable
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method, front longitudinal girder inner plate body including beam-shaped structure, by bulk metallic materials one roll forming, front longitudinal girder inner plate body includes the body leading portion, preceding changeover portion, body stage casing, rear changeover portion and the body back segment that are sequentially connected to front longitudinal girder inner plate body；Body leading portion, body stage casing and body back segment are uniform thickness structure, preceding changeover portion and rear changeover portion are continuous variable thickness structure, thickness of the thickness in body stage casing more than body leading portion, more than the thickness of body back segment, the thickness of preceding changeover portion and rear changeover portion gradually increases the thickness of body leading portion from front and rear Liang Duanbao areas to the thickness in body stage casing respectively.Compared with prior art, the beneficial effects of the invention are as follows：The reasonable combination of the flexible and intensity of structure is continuously varied to form using partial structurtes thickness, it is light-weighted simultaneously in guarantee, improve the harmful effect that thickness and the intensity jump of commissure bring, energy-absorbing value is improved, improve mouldability.
Description
Technical field
The invention belongs to the Design of Auto Parts and manufacture field, in more particularly to a kind of continuous variable thickness automobile front longitudinal beam
Plate and its manufacture method.
Background technology
Automobile front longitudinal beam inner panel is mostly an elongated longeron, and front end is connected by bolt with front bumper energy-absorption box,
Rear end is connected by spot welding with floor in automobile, and through enging cabin and driving cabin, it is main when being frontal crash of vehicles
Power transmission and energy-absorbing part.In this regard, requiring that this longeron front portion is needed with certain crumple energy-absorbing effect, middle part has good biography
Power effect, rear portion is for lightweight demand reduction weight as much as possible.
With the development of auto industry, energy-conserving and environment-protective, loss of weight turn into the theme that automobile main frame maker and user are concerned about, automobile is light
Quantization is the important measures of energy-conserving and environment-protective, is the inexorable trend of current automotive technology development.On automobile front longitudinal beam inner panel how
Realize it is structure lightened, while ensureing that its structural rigidity and crashworthiness turn into the problem that designer needs to capture.
Current automobile front longitudinal beam inner plate structure, as shown in figure 1, its by three kinds of plates of different-thickness by laser welding into
Blank, it is then stamping by forcing press, different thickness can be realized on Same Part using tailor welded, make part not
Same position has different local loads, and then product weight is significantly reduced under the requirement for meeting intensity, but due to using
Laser welding operation, the thickness change that commissure is present between thermal deformation and hardening, and plate is mutation, is unfavorable for that product is rushed
Pressing formation and crumple energy-absorbing, and product percent defective and processing cost are higher.
According to front longitudinal girder inner plate carry central collision, side impact and rolling when loading characteristic, emphasis consider collision when step by step
How the characteristic of conquassation, carry out design effectively, solves existing laser assembly solder front longitudinal girder inner plate in collision scenario due to plate
Material abrupt changes in thickness and sweating heat strain hardening can not effectively apparatus with shock absorbing problem turn into the present invention need consideration core.
The content of the invention
It is an object of the invention to provide a kind of continuous variable thickness front longitudinal girder inner plate and its manufacture method, by part along
The design of vehicle body Y direction continuous thickness change, so as to reach, do not influence part light-weighted simultaneously, improves original laser assembly solder plate
The harmful effect that the thickness and Intensity Abrupt of commissure bring, improves part security and mouldability.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of continuous variable thickness automobile front longitudinal beam inner panel, including beam-shaped structure front longitudinal girder inner plate body, front longitudinal girder inner plate
Body by bulk metallic materials one roll forming, body leading portion that front longitudinal girder inner plate body includes being sequentially connected, preceding changeover portion,
Body stage casing, rear changeover portion and body back segment；Body leading portion, body stage casing and body back segment be uniform thickness structure, preceding changeover portion and
Changeover portion is continuous variable thickness structure afterwards, and the thickness of the thickness more than body leading portion in body stage casing, the thickness of body leading portion is more than
The thickness of body back segment, the thickness of preceding changeover portion gradually increases from the thickness of body leading portion to the thickness in body stage casing, rear transition
The thickness of section is gradually reduced from the thickness in body stage casing to the thickness of body back segment.
Body leading portion thickness is 1.0-1.5mm.
Body stage casing thickness is 2.0-3.5mm.
Body back segment thickness is 1.5-2.5mm.
The cross section of front longitudinal girder inner plate body is several fonts.
The metal material for rolling front longitudinal girder inner plate body is steel, aluminium alloy or magnesium alloy.
The manufacture method of continuous variable thickness automobile front longitudinal beam inner panel, comprises the following steps：
The first step, selection thickness are the coiled strip of 1.05-1.2 times of body stage casing thickness；
Second step, by rolling, by the thickness of coiled strip be first sequentially pressed into body leading portion, preceding changeover portion, body stage casing,
The changeover portion thickness corresponding with body back segment afterwards, then be sequentially pressed into and body back segment, rear changeover portion, body stage casing, preceding mistake
Cross the section thickness corresponding with body leading portion；As a length cycles, the cycle is comprising two in the preceding vertical of specular
The plate blank of beam inner panel body；
3rd step, the above-mentioned length cycles of repetition continue to roll, and finally give the plate of the Varying-thickness of a roll of composite design requirement
Expect the coiled strip of blank；
4th step, the coiled strip of the plate blank of Varying-thickness is sheared on continuous shear stress line, obtained a series of thickening
The plate blank of degree；
5th step, the plate blank to Varying-thickness carry out punch forming, form the front longitudinal girder inner plate body of continuous variable thickness.
Cold stamping or drop stamping are used during front longitudinal girder inner plate body punch forming.
The thickness change of the preceding changeover portion of front longitudinal girder inner plate body and rear changeover portion is linear transitions or curve transition, its change
It is 1 to change gradient:50-1:400.
Beneficial effects of the present invention：
(1) part thickness of front longitudinal girder inner plate of the invention is gradually thickening from front portion to middle part, then to rear portion again gradually
Reduce, it is ensured that front longitudinal girder inner plate forward direction collision safety performance, and reach the same light weight effect of laser assembly solder plate.
(2) changeover portion is designed using continuous variable thickness before and after, and surface does not have the abrupt changes in thickness that weld seam causes, surface quality
Good, material property distribution is continuous and relatively uniform, and metal fluidity is good, is conducive to improving mouldability and energy-absorbing effect, to mould
Damage also small.
(3) some vehicles are proof strength, and stage casing carries out reinforcing plate design, and front longitudinal girder inner plate of the invention is one piece of plate
Shaping, reduces number of parts, reduces die cost, reduces welding sequence and cost of labor, can be with improve production efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing automobile front longitudinal beam inner plate structure；
Fig. 2 is existing automobile front longitudinal beam inner panel laser assembly solder plate blank schematic diagram；
Fig. 3 is the schematic diagram of front longitudinal girder inner plate structure of the present invention；
Fig. 4 is to be rolled difference slab blank schematic diagram using new front longitudinal girder inner plate.
Wherein, 1 is leading portion body, and 12 is preceding changeover portion, and 2 is stage casing body, and 23 is rear changeover portion, and 3 is back segment body, A,
B is respectively laser tailor-welded weld.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant with the present invention.
Continuous variable thickness front longitudinal girder inner plate includes following characteristics：Leading portion body 1 is, stage casing body 2 is, back segment body 3 is,
A, B are laser tailor-welded weld, and preceding changeover portion 12 is that rear changeover portion 23 is.
As shown in figure 3, a kind of continuous variable thickness front longitudinal girder inner plate of the invention, its body construction is beam-shaped structure, one
Shaped structure, includes successively, body leading portion 1, preceding changeover portion 12, body stage casing 2, rear changeover portion 23, body back segment 3.Described
Body leading portion is bolted with bumper energy absorption box, and body back segment is connected by spot welding with floor in automobile.Body leading portion, in
Section and back segment are uniform thickness structure, and front and rear changeover portion is continuous variable thickness structure, its thickness from before and after body Liang Duanbao areas to this
Body stage casing thickness area gradually increases.Body stage casing thickness is most thick in body.
As shown in figure 4, body leading portion thickness is 2.0mm, stage casing is 2.85mm, and back segment is 1.35mm, front and rear transition region
Thickness change gradient is 1:100, i.e., preceding transition region is that 85mm is long, and rear transition region is that 150mm is long.The front longitudinal girder inner plate that punching press is completed
Part section is several fonts, and material is steel material.
Manufacture method for the specific implementation case is as follows, and first, selection thickness is thickness between 2.95-3.2mm
Coiled strip, the thick body leading portions of 2.0mm are obtained by rolling, and after completing the rolling of body leading portion equal thickness, are rolled by Varying-thickness, mistake
The 2.85mm crossed to body stage casing is thick, and then preceding length of transition zone control carry out rolling for body stage casing 2.85mm in 85mm or so
System, after completing stage casing rolling, is rolled by Varying-thickness, and the 1.35mm for being transitioned into body back segment is thick, the length control of rear changeover portion
In 150mm, the equal thickness length of body back segment is controlled to 2 double-lengths of needs, is then rolled by Varying-thickness, is transitioned into body
The 2.85mm of section is thick, after completing the rolling in body stage casing, is being transitioned into the rolling of body leading portion.I.e. one length cycles include mirror
As two pieces of symmetrical continuous variable thickness plates, so repeatedly, a roll of Varying-thickness Varying-thickness for meeting design requirement is finally given
The coiled strip of plate blank.The coiled strip of the plate blank of the Varying-thickness is sheared on continuous shear stress line, is obtained a series of
Meet the plate blank of desired Varying-thickness；Finally the plate blank of the Varying-thickness to obtaining forms processing, vertical before being formed
Beam inner plate part.
It is controllable to ensure body forward structure conquassation deformation sequence because automobile is when by forward direction collision.Wherein in front longitudinal
Plate stage casing is located at under-cab, and the region is higher to strength and stiffness requirement, if insufficient strength will cause to be invaded during central collision
Amount increase, so the area thickness is maximum.The characteristics of body leading portion is partially thin simultaneously be to ensure that after bumper deformation, can be prior to
Body stage casing first deforms, and absorbs enough impact energies, and body back segment is located at non-bearing area, and correspondence thickness is minimum, so as to protect
While card bonding strength, lightweight to greatest extent is realized as laser assembly solder plate.Simultaneously because front and rear transition region thickness connects
Continuous change, it is to avoid the harmful effect that the intensity jump of the thickness jump that weld seam brings brings, can to a certain extent improve suction
Can value, improvement security and mouldability.
Continuous variable thickness front longitudinal girder inner plate of the present invention and its manufacture method, knot is continuously varied to form using partial structurtes thickness
The reasonable combination of the flexible and intensity of structure, light-weighted simultaneously in guarantee, the thickness and intensity for improving commissure jump what is brought
Harmful effect, improves energy-absorbing value, improves mouldability.
The front longitudinal girder inner plate part that the present invention is obtained, analyzes, zero by the offset collision of real vehicle front 40% (64.3kph)
In the case that part weight keeps constant, this structure increased 4% than former laser assembly solder side rail structure energy-absorbing effect, and drop
Low production cost.
With above-mentioned according to desirable embodiment of the invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (9)
1. a kind of continuous variable thickness automobile front longitudinal beam inner panel, it is characterised in that：Front longitudinal girder inner plate body including beam-shaped structure, it is preceding
Side rail body by bulk metallic materials one roll forming, body leading portion that front longitudinal girder inner plate body includes being sequentially connected,
Preceding changeover portion, body stage casing, rear changeover portion and body back segment；Body leading portion, body stage casing and body back segment are uniform thickness structure, preceding
Changeover portion and rear changeover portion are continuous variable thickness structure, and the thickness in body stage casing is more than the thickness of body leading portion, body leading portion
Thickness is more than the thickness of body back segment, and the thickness of preceding changeover portion gradually increases from the thickness of body leading portion to the thickness in body stage casing
Greatly, the thickness of rear changeover portion is gradually reduced from the thickness in body stage casing to the thickness of body back segment.
2. continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：Body leading portion thickness is
1.0-1.5mm。
3. continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：Body stage casing thickness is
2.0-3.5mm。
4. continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：Body back segment thickness is
1.5-2.5mm。
5. continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：Front longitudinal girder inner plate body
Cross section is several fonts.
6. continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：Rolling front longitudinal girder inner plate sheet
The metal material of body is steel, aluminium alloy or magnesium alloy.
7. the manufacture method of continuous variable thickness automobile front longitudinal beam inner panel according to claim 1, it is characterised in that：
Comprise the following steps：
The first step, selection thickness are the coiled strip of 1.05-1.2 times of body stage casing thickness；
Second step, by rolling, the thickness of coiled strip is first sequentially pressed into and body leading portion, preceding changeover portion, body stage casing, rear mistake
The section thickness corresponding with body back segment is crossed, then is sequentially pressed into and body back segment, rear changeover portion, body stage casing, preceding changeover portion
The thickness corresponding with body leading portion；As a length cycles, the cycle is comprising in two front longitudinals in specular
The plate blank of plate body；
3rd step, the above-mentioned length cycles of repetition continue to roll, and finally give the plate hair of the Varying-thickness of a roll of composite design requirement
The coiled strip of base；
4th step, the coiled strip of the plate blank of Varying-thickness is sheared on continuous shear stress line, obtained a series of Varying-thickness
Plate blank；
5th step, the plate blank to Varying-thickness carry out punch forming, form the front longitudinal girder inner plate body of continuous variable thickness.
8. the manufacture method of continuous variable thickness automobile front longitudinal beam inner panel according to claim 7, it is characterised in that：Front longitudinal
Cold stamping or drop stamping are used during inner panel body punch forming.
9. the manufacture method of continuous variable thickness automobile front longitudinal beam inner panel according to claim 7, it is characterised in that：
The thickness change of the preceding changeover portion of front longitudinal girder inner plate body and rear changeover portion is linear transitions or curve transition, its change ladder
Spend is 1:50-1:400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054419.9A CN106891996A (en) | 2017-01-22 | 2017-01-22 | A kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054419.9A CN106891996A (en) | 2017-01-22 | 2017-01-22 | A kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106891996A true CN106891996A (en) | 2017-06-27 |
Family
ID=59199048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710054419.9A Pending CN106891996A (en) | 2017-01-22 | 2017-01-22 | A kind of continuous variable thickness automobile front longitudinal beam inner panel and its manufacture method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107391840A (en) * | 2017-07-20 | 2017-11-24 | 江苏大学 | A kind of thickness distribution design method in continuous variable thickness automobile front longitudinal beam energy-absorbing buffering area |
| CN107600012A (en) * | 2017-09-20 | 2018-01-19 | 江苏大学 | A kind of automotive front end endergonic structure based on customizing functions |
| CN107600186A (en) * | 2017-09-20 | 2018-01-19 | 江苏大学 | A kind of automobile Varying-thickness front longitudinal girder inner plate structure for meeting customizing functions requirement |
| CN107628115A (en) * | 2017-09-20 | 2018-01-26 | 江苏大学 | A kind of automobile Varying-thickness, variable cross-section front rail structure for customizing functions |
| CN109108069A (en) * | 2018-08-01 | 2019-01-01 | 上海宝钢包装钢带有限公司 | The milling method of Varying-thickness automobile B-column |
| CN109606224A (en) * | 2018-12-03 | 2019-04-12 | 广汽零部件有限公司 | The co-driver seat of automobile skeleton seat cushion side plate and its manufacturing method of lightweight not uniform thickness |
| CN111661153A (en) * | 2020-05-07 | 2020-09-15 | 东风汽车股份有限公司 | Integral frame type H-shaped light truck frame assembly |
| CN112935048A (en) * | 2021-01-27 | 2021-06-11 | 上海宝钢新材料技术有限公司 | Lightweight aluminum-silicon variable-thickness plate part and preparation method thereof |
| CN113734081A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Lower protection crossbeam, subassembly and vehicle before vehicle |
| CN113790901A (en) * | 2021-09-06 | 2021-12-14 | 一汽奔腾轿车有限公司 | Data processing method for chassis control stability steering center area test |
| CN114802446A (en) * | 2021-01-19 | 2022-07-29 | 宝山钢铁股份有限公司 | Differential-strength-difference thick hot-stamped automobile front longitudinal beam and preparation method and die thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107391840B (en) * | 2017-07-20 | 2020-07-31 | 江苏大学 | Thickness distribution design method of energy absorption buffer area of continuously variable-thickness automobile front longitudinal beam |
| CN107391840A (en) * | 2017-07-20 | 2017-11-24 | 江苏大学 | A kind of thickness distribution design method in continuous variable thickness automobile front longitudinal beam energy-absorbing buffering area |
| CN107628115B (en) * | 2017-09-20 | 2023-09-22 | 江苏大学 | Automobile variable thickness and variable cross section front longitudinal beam structure for function customization |
| CN107600012A (en) * | 2017-09-20 | 2018-01-19 | 江苏大学 | A kind of automotive front end endergonic structure based on customizing functions |
| CN107600186A (en) * | 2017-09-20 | 2018-01-19 | 江苏大学 | A kind of automobile Varying-thickness front longitudinal girder inner plate structure for meeting customizing functions requirement |
| CN107628115A (en) * | 2017-09-20 | 2018-01-26 | 江苏大学 | A kind of automobile Varying-thickness, variable cross-section front rail structure for customizing functions |
| CN109108069A (en) * | 2018-08-01 | 2019-01-01 | 上海宝钢包装钢带有限公司 | The milling method of Varying-thickness automobile B-column |
| CN109108069B (en) * | 2018-08-01 | 2020-08-07 | 上海宝钢包装钢带有限公司 | Rolling method of variable-thickness automobile B column |
| CN109606224A (en) * | 2018-12-03 | 2019-04-12 | 广汽零部件有限公司 | The co-driver seat of automobile skeleton seat cushion side plate and its manufacturing method of lightweight not uniform thickness |
| CN109606224B (en) * | 2018-12-03 | 2023-10-20 | 广汽零部件有限公司 | Lightweight unequal-thickness automobile co-driver seat skeleton seat cushion side plate and manufacturing method thereof |
| CN111661153A (en) * | 2020-05-07 | 2020-09-15 | 东风汽车股份有限公司 | Integral frame type H-shaped light truck frame assembly |
| CN111661153B (en) * | 2020-05-07 | 2022-07-22 | 东风汽车股份有限公司 | Integral frame type H-shaped light truck frame assembly |
| CN113734081A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Lower protection crossbeam, subassembly and vehicle before vehicle |
| CN114802446A (en) * | 2021-01-19 | 2022-07-29 | 宝山钢铁股份有限公司 | Differential-strength-difference thick hot-stamped automobile front longitudinal beam and preparation method and die thereof |
| CN112935048A (en) * | 2021-01-27 | 2021-06-11 | 上海宝钢新材料技术有限公司 | Lightweight aluminum-silicon variable-thickness plate part and preparation method thereof |
| CN113790901A (en) * | 2021-09-06 | 2021-12-14 | 一汽奔腾轿车有限公司 | Data processing method for chassis control stability steering center area test |
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Application publication date: 20170627 |