CN104925009A - Variable-thickness automobile front bumper and manufacturing method thereof - Google Patents
Variable-thickness automobile front bumper and manufacturing method thereof Download PDFInfo
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- CN104925009A CN104925009A CN201510386296.XA CN201510386296A CN104925009A CN 104925009 A CN104925009 A CN 104925009A CN 201510386296 A CN201510386296 A CN 201510386296A CN 104925009 A CN104925009 A CN 104925009A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
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Abstract
The invention provides a variable-thickness automobile front bumper and a manufacturing method thereof. The automobile front bumper comprises a front bumper body which is of a thin-wall structure. The front bumper body sequentially comprises a left body section, a left transition section, a right body section, a right transition section and a right body section. A left energy absorption box and a right energy absorption box are arranged on the inner side faces of the left body section and the right body section of the front bumper body respectively, so that the front bumper body is connected with an automobile front longitudinal beam. The left body section and the right body section are of a uniform-thickness structure. The left transition section and the right transition section are of a continuous variable-thickness structure and become thinner gradually from the two ends to the middle body section. The middle body section is of a uniform-thickness structure and is the thinnest portion of the whole front bumper body. According to the variable-thickness automobile front bumper, by means of the design of parts of different thicknesses, the requirement for collision safety of the automobile front bumper is met, and the design of light parts can be achieved at the same time.
Description
Technical field
The invention belongs to the Design of Auto Parts and manufacture field, particularly a kind of Varying-thickness automobile front beam and manufacture method thereof.
Background technology
In front part structure of vehicle body, the energy absorption characteristics of front bumper in collision process and vehicle body safety have very important relation.Low speed collision is one of main forms of collision of traffic safety accident; and in city traffic after automobile and other automobiles or object generation head-on crash; automobile front beam can receive infringement thereupon; if moderate finite deformation will be there is in collision process in its undercapacity; thus the part such as the heat radiation rack at its rear that cannot adequately protect and longeron; cause larger damage to a vehicle body, for vehicle maintenance and repair brings larger difficulty, and produce corresponding larger economic loss.For reducing the deflection protection vehicle body front structure of front bumper, usually can design stronger automobile front beam, adopting the high strength steel iron material that thickness is larger.Therefore, should ensure that in the design of automobile front beam it has certain flexibility, play the effect of buffering and energy-absorbing, there is again enough intensity, to ensure the safety of machinery space and vehicle body main body and occupant in collision process simultaneously.
And simultaneously along with the increase of automobile pollution, environmental problem is paid close attention to by automobile vendor and user vehicle, automotive light weight technology is the effective measures of energy-conserving and environment-protective, is also the inexorable trend of automotive technology development.How automobile front beam realizes it structure lightened, ensure that it becomes a major challenge at structural rigidity and collision performance requirement simultaneously.
The thickness distribution of current automobile front beam is not Varying-thickness, according to the theory of strength of material, the material having considerable part can not be had contribution to the overall mechanical property of mechanism to bearing in process of mechanical behavior by girder construction structural body material when stressed of this equal thickness, therefore, by design plan disclosed in this case and manufacture method thereof, adopt a kind of new design principle, become Varying-thickness distribution, reach the best light weight effect of structure.
On current auto body, front bumper adopts metallic material to carry out being processed into the forms such as U-shaped, B font and W shape through modes such as cold stamping, roll-in or drop stampings usually, then adopts bolt with parts such as chassis runneies or the mode such as to weld links together.
Chinese patent notification number is the cross section that a kind of front bumper beam of 101965277A has B font, comprise the beam main body be made up of the sheet material of steel and the brace panel be made up of aluminium based material (aluminium or aluminum alloy), due to this front bumper enclosed cross, its detail rigidity can be promoted.
Chinese patent notification number is that the front bumper reinforcement of 102371957A is by aluminium alloy extruded shaping, extend in vehicle width equal thickness, its cross section is W shape, this front bumper reinforcement comprises end in a width direction of the vehicle, and described end is connected to the link extended in the longitudinal direction of the vehicle.
Adopt the structure of above openly two schemes to carry out the design of front bumper and strength beam thereof, because in collision process, primary deformable region concentrates on vehicle body bight, need the performance special concern of the resistance to deformation to its end positions.Current most of front bumper possesses constant cross sectional shape, its feature can cause front bumper bending, reverse and do not have homogeneous performance at longitudinal direction under the condition such as compression,, there is the shortcoming that weight is large, cost is high in the front bumper in the present invention relative to the front bumper of thickness of this not variable section.Meanwhile, this performance that can produce from the homogeneous constant front bumper of vehicle body lateral performance is had more than needed, and is superfluous design from structure and material, the raw-material use amount of direct waste, add the deadweight of automobile simultaneously, while being unfavorable for fuel-economizing, increase materials'use cost.
Summary of the invention
The object of the present invention is to provide a kind of Varying-thickness automobile front beam and manufacture method thereof, reach the requirement of automobile front beam to crash survivability by the design of part different-thickness, the light-weight design of part can be realized simultaneously.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of Varying-thickness automobile front beam, comprise, a front bumper body, it is thin-wall construction, comprises left section of body, left transition phase, body stage casing, right transition phase, right section of body successively; Left and right energy-absorption box, is arranged at body left and right section of medial surface of described front bumper body respectively, is linked together by the front side member of front bumper body and automobile; It is characterized in that, the thick structures such as the left and right Duan Wei of described body; Described left and right transition phase is continuous variable thickness structure, and from two ends, thick district reduces to body stage casing the thickness of left and right transition phase gradually; Described body stage casing is wait thick structure, and its thickness is that whole front bumper body is the thinnest.
Preferably, the thickness that described body is left and right section is 1.5 ~ 3.0 millimeters.
Preferably, the left and right segment length of described body is 150 ~ 400mm.
Preferably, described body stage casing thickness is 0.7 ~ 2.0 millimeter.
Preferably, left section of described front bumper body, left transition phase, body stage casing, right transition phase, body right section of structure that is one of the forming.
Preferably, described front bumper body construction cross section is B font, W font or U-shaped.
Preferably, described front bumper body material is metallic material.
Preferably, described metallic material comprises high strength steel, aluminum alloy or magnesium alloy.
The manufacture method of Varying-thickness automobile front beam of the present invention, first, a thickness is selected to be the coiled strip of front bumper body left section of thickness more than 1.1 times, coiled strip thickness is obtained by the thickness of body left section of thickness transitions to body stage casing by rolling, then by the thickness transitions in body stage casing to the thickness of right section of body; Due to thickness and body left section of consistency of thickness of right section of body, the rolling of left section of next body can be started after rolling completes right section of body, afterwards by the thickness transitions of left section of body to the thickness in body stage casing, again by the thickness transitions in body stage casing to the thickness of right section of body, thus repeatedly, the Varying-thickness coiled strip that a volume meets designing requirement is finally obtained; Wherein, automobile front beam is symmetrical structure, and left and right section thickness is equal; The thickness that front bumper body is left and right section 1.5 ~ 3.0 millimeters, stage casing thickness 0.7 ~ 2.0 millimeter; To described Varying-thickness coiled strip after completing rolling process, will shear on continuous shear stress line, obtain the Varying-thickness plate of a series of variation in thickness; Described Varying-thickness plate is formed, forms Varying-thickness front bumper body.
Preferably, the variation in thickness gradient of the left and right transition phase of described front bumper body is 1:50 ~ 1:200, i.e. variation in thickness 1mm, and the length of left and right transition phase is 50 ~ 200mm.
Further, form processing to described Varying-thickness plate, processing mode is cold stamping, drop stamping or rolling formation.
The composition of the automobile front beam of usual employing, by two energy-absorption boxes and two front side members, or directly by two front side members, is connected to body forward structure and forms a beam type structure, the protection mechanism of structure coupled engines, driving compartment, chaufeur and occupant.Front bumper face shield is generally Plastic Parts, is arranged on the outside of front bumper skeleton, serves protective effect in an impact to pedestrian and auto body, and this part is not within the scope of the invention; Front bumper skeleton is the main body bearing collision, is object of the present invention, is called for short front bumper in the present invention.
During due to automobile generation front low speed collision, most collision impact comes from automobile bight.As automobile cannot bear respective impact in corner impact process, cause moderate finite deformation, will cause the heat radiation rack at its rear portion, fan even the part such as longeron damage, improve the maintenance cost of auto against.
Therefore, for making Federal bumper reduce damage to a vehicle body in the process collided, considering lightweight simultaneously, strengthening in Federal bumper to two ends, it is a kind of feasible scheme that light-weight design is carried out in middle part.
The plate that the present invention is made by rolling technique makes front bumper body, front bumper has different thickness distribution at vehicle body different cross section transversely, thus at the vehicle body corner positions front bumper of vehicle body collision critical area, there is larger thickness, reduce damage to a vehicle body in automobile collision procedure thus; Be designed to less thickness by the middle part of the front bumper of non-critical areas in collision simultaneously, thus realize light-weight design.This front bumper arrangement can not only meet the requirement of vehicle body crash survivability preferably, and structure is simple, adopts continuous variable thickness plate to make, the surdimensionnement in material thickness and number of parts can be avoided, reduce front bumper cost of manufacture, and light weight effect is good.
Varying-thickness automobile front beam of the present invention and manufacture method, utilize the front bumper of local structure variation in thickness to the reasonable combination of the flexibility and intensity that form structure, Collision-free impacts, particularly from the impact in automobile body bight, and can weight be reduced simultaneously, realize lightweight.
Beneficial effect of the present invention:
1. the walled thickness of front bumper arrangement of the present invention increases gradually from middle part to bight, can ensure that the collision safety performance of front bumper can increase successively from middle part to bight, meet the crash survivability requirement of front bumper;
2. front bumper arrangement of the present invention adopts flexible rolling Varying Thickness Plates, the abrupt changes in thickness that surface does not have weld seam to cause, and its surface quality is good, and Joint strenght is high, homogenous material properties, and intensity distribution is continuous;
3. front bumper arrangement of the present invention is because have employed the design of material of non-uniform thickness, farthest decreases materials'use, and light weight effect is good;
4. front bumper arrangement of the present invention is one piece of plate shaping, compares existing part has brace panel front bumper in bight, decreases number of parts, reduces die cost, decreases welding sequence, can effective improving production efficiency;
5. adopt Varying-thickness automobile front beam scheme of the present invention, light weight effect is good, and performance is given prominence to, and integrated cost reduces.
Accompanying drawing explanation
Fig. 1 is the structural representation of automobile front beam of the present invention.
Fig. 2 is the schematic diagram of the left and right transition phase of automobile front beam body of the present invention.
Fig. 3 is the schematic diagram of Varying Thickness Plates material base material in automobile front beam manufacture method of the present invention.
Detailed description of the invention
See Fig. 1, a kind of Varying-thickness automobile front beam of the present invention, comprises, a front bumper body, and it is thin-wall construction, comprises body left section 1, left transition phase 2, body stage casing 3, right transition phase 4, body right section 5 successively; Left and right energy-absorption box 6,7, is arranged at body left and right section 1,5 medial surfaces of described front bumper body respectively, is linked together by the front side member of front bumper body and automobile; Wherein, described body left and right section 1,5 such as is at the thick structure; Described left and right transition phase 2,4 is continuous variable thickness structure, and from two ends, thick district reduces to body stage casing 3 thickness of left and right transition phase 2,4 gradually; Described body stage casing 3 is for waiting thick structure, and its thickness is that whole front bumper body is the thinnest.
Preferably, described body left and right section 1,5 thickness be 1.5 ~ 3.0 millimeters.
Preferably, described body left and right section 1,5 length are 150 ~ 400mm.
Preferably, described body stage casing 3 thickness is 0.7 ~ 2.0 millimeter.
Preferably, described front bumper body left section 1, left transition phase 2, body stage casing 3, right transition phase 4, body right section 5 structure that is one of the forming.
Preferably, described front bumper body construction cross section is B font, W font or U-shaped.
Preferably, described front bumper body material is metal material.Described metallic material comprises high strength steel, aluminum alloy or magnesium alloy; .
See Fig. 2, the thickness that front bumper body is left section 1 is the first thickness t1, left transition phase 2 is the thickness transitions region in body left section 1 and body stage casing 3, the thickness in body stage casing 3 can be equal thickness-the second thickness t2, right transition phase 4 is body stage casing 3 and the thickness transitions region of body right section 5, and the thickness that body is right section 5 is the 3rd thickness t3.
First thickness t1 is equal with the 3rd thickness t3, and the second thickness t2 is less than the first thickness t1 and the 3rd thickness t3, and the first thickness t1 and the 3rd thickness t3 is between 1.5 ~ 2.5mm in the present embodiment, and the second thickness t2 is between 1.0 ~ 1.5mm.
Front bumper body is when designing, and the thickness difference of its maximum ga(u)ge (the first thickness t1 and the 3rd thickness t3) and minimum thickness (the second thickness t2) is 2:1.
The thickness of the left transition phase of front bumper body 2 and right transition phase 4 is between body left section of 1 first thickness t1 and body stage casing 3 second thickness t2, and variation in thickness is linear transitions, as shown in Figure 2.
Wherein, the variation in thickness gradient of left transition phase 2 and right transition phase 4 is determined according to implementing the roller diameter of milling train of flexible rolling and mill speed, and be set to 1:100 in the present embodiment, i.e. variation in thickness 1mm, the length of transition region is 100mm.
In the present embodiment, described front bumper body construction cross section is W font.
The manufacture method of Varying-thickness automobile front beam of the present invention, first, a thickness is selected to be the coiled strip of front bumper body left section more than 1.1 times, coiled strip thickness is obtained by the thickness of body left section of thickness transitions to body stage casing by rolling, then by the thickness transitions in body stage casing to the thickness of right section of body; Due to thickness and body left section of consistency of thickness of right section of body, the rolling of left section of next body can be started after rolling completes right section of body, afterwards by the thickness transitions of left section of body to the thickness in body stage casing, again by the thickness transitions in body stage casing to the thickness of right section of body, thus repeatedly, the Varying-thickness coiled strip that a volume meets designing requirement is finally obtained; Wherein, automobile front beam is symmetrical structure, and left and right section thickness is equal; The thickness that front bumper is left and right section 1.5 ~ 3.0 millimeters, stage casing thickness 0.7 ~ 2.0 millimeter; To described Varying-thickness coiled strip after completing rolling process, will shear on continuous shear stress line, obtain the Varying-thickness plate of a series of variation in thickness; Described Varying-thickness plate is formed, forms Varying-thickness front bumper body.
Preferably, the variation in thickness gradient of the left and right transition phase of described front bumper body is 1:50 ~ 1:200, i.e. variation in thickness 1mm, and the length of left and right transition phase is 50 ~ 200mm.
Further, form processing to described Varying-thickness plate, processing mode is cold stamping, drop stamping or rolling formation.
In the present embodiment, comprise: select a volume original thickness t0 to be the coiled strip of more than 1.1 times of the first thickness t1, obtain coiled strip thickness by rolling mill practice and be transitioned into the second thickness t2 by the first thickness t1, the 3rd thickness t3 is transitioned into again by the second thickness t2, thus repeatedly, the Varying-thickness coiled strip that a volume meets designing requirement is finally obtained;
Described Varying-thickness coiled strip is sheared on continuous shear stress line, obtains a series of thickness and be transitioned into from the first thickness t1 the Varying Thickness Plates material base material that the second thickness t2 is transitioned into the 3rd thickness t3 again, as shown in Figure 3; Finally, described Varying-thickness plate is formed, form Varying-thickness front bumper body.
The present invention adopts a kind of cold rolling plate of continuous variable thickness, use it for and be made into a kind of automobile front beam, made front bumper is different at the design thickness along vehicle body Y direction different parts, this Varying-thickness front bumper well can overcome the deficiency of disclosed various front bumper design plan in early stage, the Varying-thickness plate that this Varying-thickness automobile front beam adopts one piece of zones of different thickness different is made, both ensure that it had certain flexibility, play the effect of buffering and energy-absorbing, there is again enough intensity simultaneously, to ensure the safety of machinery space and vehicle body main body and occupant in collision process, meet its collision safety sexual demand.
Automotive safety and lightweight become the Main way of development of automobile.Varying-thickness automobile front beam, is the different parts design different-thickness at front bumper, and adopts the same Varying-thickness plate through the continuous thickness transitions of flexible rolling to be made.Not only well meet the requirement of the crash survivability of energy-absorption box, also farthest decrease materials'use, while realizing safety, realize lightweight.
The inventive method also can, on other framing members of automobile, as the body structural members such as roof cross beam, sill strip, chair mounted crossbeam, B post are applied, more can be applied in other physical constructions.
Claims (11)
1. a Varying-thickness automobile front beam, comprises,
One front bumper body, it is thin-wall construction, comprises left section of body, left transition phase, body stage casing, right transition phase, right section of body successively;
Left and right energy-absorption box, is arranged at body left and right section of medial surface of described front bumper body respectively, is linked together by the front side member of front bumper body and automobile; It is characterized in that,
The thick structures such as the left and right Duan Wei of described body;
Described left and right transition phase is continuous variable thickness structure, and from two ends, thick district reduces to body stage casing the thickness of left and right transition phase gradually;
Described body stage casing is wait thick structure, and its thickness is that whole front bumper body is the thinnest.
2. Varying-thickness automobile front beam as claimed in claim 1, it is characterized in that, the thickness that described body is left and right section is 1.5 ~ 3.0 millimeters.
3. Varying-thickness automobile front beam as claimed in claim 1 or 2, it is characterized in that, the left and right segment length of described body is 150 ~ 400mm.
4. Varying-thickness automobile front beam as claimed in claim 1, it is characterized in that, described body stage casing thickness is 0.7 ~ 2.0 millimeter.
5. Varying-thickness automobile front beam as claimed in claim 1 or 2 or 3 or 4, is characterized in that, left section of described front bumper body, left transition phase, body stage casing, right transition phase, body right section of structure that is one of the forming.
6. Varying-thickness automobile front beam as claimed in claim 1, it is characterized in that, described front bumper body construction cross section is B font, W font or U-shaped.
7. the Varying-thickness automobile front beam as described in claim 1 or 6, is characterized in that, described front bumper body material is metallic material.
8. Varying-thickness automobile front beam as claimed in claim 7, it is characterized in that, described metallic material comprises high strength steel, aluminum alloy or magnesium alloy.
9. the manufacture method of Varying-thickness automobile front beam as claimed in claim 1, it is characterized in that: first, a thickness is selected to be the coiled strip of front bumper body left section of thickness more than 1.1 times, coiled strip thickness is obtained by the thickness of body left section of thickness transitions to body stage casing by rolling, then by the thickness transitions in body stage casing to the thickness of right section of body; Due to thickness and body left section of consistency of thickness of right section of body, the rolling of left section of next body can be started after rolling completes right section of body, afterwards by the thickness transitions of left section of body to the thickness in body stage casing, again by the thickness transitions in body stage casing to the thickness of right section of body, thus repeatedly, the Varying-thickness coiled strip that a volume meets designing requirement is finally obtained; Wherein, automobile front beam is symmetrical structure, and left and right section thickness is equal; The thickness that front bumper body is left and right section 1.5 ~ 3.0 millimeters, stage casing thickness 0.7 ~ 2.0 millimeter; To described Varying-thickness coiled strip after completing rolling process, will shear on continuous shear stress line, obtain the Varying-thickness plate of a series of variation in thickness; Described Varying-thickness plate is formed, forms Varying-thickness front bumper body.
10. the manufacture method of Varying-thickness automobile front beam as claimed in claim 9, it is characterized in that, the variation in thickness gradient of the left and right transition phase of described front bumper body is 1:50 ~ 1:200, i.e. variation in thickness 1mm, and the length of left and right transition phase is 50 ~ 200mm.
The manufacture method of 11. Varying-thickness automobile front beams as claimed in claim 9, is characterized in that, form processing to described Varying-thickness plate, processing mode is cold stamping, drop stamping or rolling formation.
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| CN201510386296.XA CN104925009A (en) | 2015-06-30 | 2015-06-30 | Variable-thickness automobile front bumper and manufacturing method thereof |
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| JP2017047818A (en) * | 2015-09-03 | 2017-03-09 | 豊田鉄工株式会社 | Manufacturing method of bumper reinforcement |
| CN106994949A (en) * | 2016-01-22 | 2017-08-01 | 本特勒尔汽车技术有限公司 | Collision prevention girders and the method for manufacturing collision prevention girders |
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| CN109987140A (en) * | 2017-12-29 | 2019-07-09 | 长城汽车股份有限公司 | Automobile frame |
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| CN113859390A (en) * | 2020-06-29 | 2021-12-31 | 宝山钢铁股份有限公司 | Design and processing method of automotive closed section structural part with multiple cavities and variable wall thickness |
| CN112124235A (en) * | 2020-09-24 | 2020-12-25 | 东风柳州汽车有限公司 | Guard bar |
| CN114987635A (en) * | 2022-05-31 | 2022-09-02 | 东风柳州汽车有限公司 | Base plate of traction seat for vehicle and production process thereof |
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Application publication date: 20150923 |