CN103625401A - Window type thin-wall square tube energy absorption device - Google Patents
Window type thin-wall square tube energy absorption device Download PDFInfo
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- CN103625401A CN103625401A CN201310669460.9A CN201310669460A CN103625401A CN 103625401 A CN103625401 A CN 103625401A CN 201310669460 A CN201310669460 A CN 201310669460A CN 103625401 A CN103625401 A CN 103625401A
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Abstract
The invention discloses a window type thin-wall square tube energy absorption device, and is characterized in that the energy absorption device is a thin-wall square tube, which is axially provided with N layers of window modules, wherein one or more of rows of notches are arranged in all four surfaces of each layer of window module, the number N of the window modules is within 4 to 8, the notches are triangular, quadrangular or hexagonal, the length L of the thin-wall square tube is 150-200 mm, the wall thickness d is 0.5-5 mm, and the side length c of the section is 40-70 mm. in comparison with the common window-free thin-wall tube product, the window type thin-wall square tube energy absorption device has the remarkable characteristic of capability of artificially determining the axial telescoping times and the telescoping position of the thin-wall tube product, and has the effects and the advantages of capability of realizing a collision device while meeting requirements of a high ratio energy absorption rate and low load uniformity coefficients, simple structure, stable performance, simplicity in processing and difficulty in losing efficacy.
Description
Technical field
The invention belongs to body structure manufacturing technology field, relate to a kind of safety guard, relate in particular to the lightweight energy absorption device that a kind of directed guiding collapses distortion.
Background technology
The key characteristic of energy absorption device is after absorbing a large amount of impact energys; the stress that passes to protected thing is less than its detrimental stress; thereby make protected thing exempt from destruction; thin metallic tubd, as the member of a kind of low cost, high energy-absorbing, is widely used in the impact kinetic energy dissipative system of nearly all vehicle such as automobile, steamer and aircraft.Thin-wall metal pipe is mainly the impact kinetic energy dissipating in vehicle collision by plastic deformation; And the stored energy of thin metallic tubd axial deformation is approximately than the horizontal high order of magnitude, therefore studying the dynamic energy absorption characteristics of thin-walled tube under Axial Loads is the important topic in Structural Crashworthiness field.Single thin-walled tube relies on irreversible plastic buckling to absorb energy, is traditional endergonic structure, is also one of most widely used buffering energy-absorbing structure.From the viewpoint of the deformation mechanism of plastic hinge and energy absorption characteristics etc., the deformation pattern of the thin-wall metal pipe component under Axial Loads can be divided three classes: (1) progressive deformation pattern that collapses, claim again " collapsible " distortion, plastic hinge forms in an orderly manner one by one from structure one end, is the best deformation pattern of endergonic structure; (2) Euler deformation pattern, its initial deformation is subject to the control of cross bending distortion, and first plastic hinge generally occurs in member middle part, produces subsequently large cross travel, be the very low deformation pattern of a kind of energy-absorbing efficiency, while carrying out crash-worthiness design, should avoid absorption cell that this distortion occurs as far as possible; (3) mixed deformation pattern, its principal feature is that the progressive distortion that collapses occurs the distortion starting stage, forms one or more plastic hinges, changes subsequently Euler distortion into, is the deformation pattern that a kind of probability of occurrence is higher.Quantity research shows greatly, and through reasonably design, single thin-walled tube structure has controollable failure mode, compared with pulsation-free clamp load, is excellent buffering energy-absorbing element.
Summary of the invention
Technical matters to be solved by this invention is reasonably to design the thin-walled tube that a class has controllable deforming pattern, carry out light-weight design simultaneously, overcome the deficiencies in the prior art, provide a kind of adapt to Various Complex operating mode, load impacting steadily, high than energy-absorbing rate, be convenient to the lightweight energy absorption device of production application.This energy absorption device is mainly used in the vehicle, is convenient to carry out energy-absorbing, protection occupant and cargo security when there is traffic accident impact.
Technical solution of the present invention is to provide a kind of band window formula thin-walled square tube energy absorption device, it is characterized in that, this energy absorption device is a thin-walled square tube, it is provided with N layer band window module vertically, and row or multiple row notch are all opened in every layer of band window module four sides, and band window number of modules N value is between 4 to 8, notch shape can be triangle, quadrangle or hexagon, described thin-walled square tube length L is 150-200mm, and wall thickness d is 0.5-5mm, and cross section length of side c is 40-70mm.
Further, described thin-walled square tube is offered rectangular notch, and the long a of notch is 20mm, and high b is 30mm, apart from two lateral extent e, is 5mm, and single belt window module height H is 40mm.
Further, when notch shape is quadrangle, this quadrangle comprises square, rectangle, rhombus or trapezoidal.
Further, wherein, when notch shape is quadrangle, described thin-walled square tube has the square notch that the length of side diminishes gradually on four sides, and its length of side is by function f (x)=(9-x) a/8 changes, wherein a is one deck module notch length of side, and x is the number of plies of place module.
Further, every layer of band window module four sides all has two row notches; on thin-walled square tube inwall vertical welding, be with window formula thin plate, described band window formula thin plate length is identical with thin-walled square tube length, offers notch shape and can be triangle, quadrangle or hexagon on band window formula thin plate.
Further,, the window formula thin plate orthogonal setting of two bands, and by their integral solder in thin-walled square tube inwall, make whole energy absorption device cross sectional shape be sphere of movements for the elephants shape.
Further, every layer of band window module four sides all has two row notches, installs another built-in thin-walled band window square tube in thin-walled square tube additional, and the two is fixed by welding, and the outer normal direction of outer normal direction each face corresponding to thin-walled square tube of each face of thin-walled band window square tube differs 45 °.
Further, each face of thin-walled band window square tube offers single-row rectangular notch, and thin-walled square tube has two row rectangular notches, and the two notch number of modules is identical.
Further, this energy absorption device is for the vehicle.
The invention has the beneficial effects as follows:
1, on thin-walled square tube wall, have notch, intensity size distribution is different vertically to make thin-walled square tube, and deformation pattern is controlled;
2, due to notch is offered in the distortion low position of very little energy absorption, the total quality of this device is reduced greatly, than energy-absorbing rate, greatly promote;
3, axial reinforcement mode of the present invention is conducive to tackle the impact of tilting load;
4, the present invention is simple in structure, is convenient to manufacture, with low cost, safe and reliable.
5, on thin-walled square tube inwall vertical welding, be with window formula thin plate, make whole device cross sectional shape be sphere of movements for the elephants shape, this kind of mode can strengthen the impact strength of whole device greatly, and reaches weight-saving object, is applicable to the operating mode of answering impact energy large.
6, the present invention proposes the mode that installs another thin-walled band window square tube in thin-walled square tube additional, this type of mode has greatly strengthened the energy-absorbing efficiency of energy absorption device, and forms framed structure on its cross-sectional plane, the stability of structure strengthens, in addition, in processing and manufacturing, relative simple and flexible.
Accompanying drawing explanation
Fig. 1 is this structural representation with window formula energy absorption device;
Fig. 2 is that notch shape is the thin-walled square tube structural representation of rhombus;
Fig. 3 is that length reduces gradually, the rectangular notch thin-walled square tube structural representation that width is constant;
Fig. 4 is that the distortion of with window formula thin-walled square tube collapses endergonic process figure;
Fig. 5 is the with window formula energy absorption device structural representation of sphere of movements for the elephants tee section;
Fig. 6 is the fixed with window formula energy absorption device structural representation of inside and outside thin-walled square tube;
Fig. 7 is thin wall rectangle tube welding mode one;
Fig. 8 is thin wall rectangle tube welding mode two.
The specific embodiment
Below in conjunction with accompanying drawing 1-8 and specific embodiment, the present invention is elaborated.
As shown in Figure 1, the cross-sectional form of energy absorption device of the present invention is that this with window formula energy absorption device is a thin-walled square tube, and it has N layer band window module vertically, and N value is between 4 to 8, and every layer of band window module four sides all has notch, and notch position occupy respectively in the face of on center line.Notch shape can be triangle, quadrangle or hexagon, and quadrangle comprises square, rectangle, rhombus or trapezoidal, and it is fixed that notch size is got according to parameters such as specific design size, material and bearing load size, directions.When structure is collided impact, institute's otch place intensity is lower, and guiding thin-walled square tube is collapsed to distortion at notch place.
For avoiding apparatus of the present invention when work thin-walled square tube because intensity reason axial unstability occurs or energy-absorbing is not enough, there is kinds of schemes to do some Strength Changes to thin-walled square tube and process, as preferably, there are following 3 kinds of concrete modes:
(1) as shown in Figure 2; thin-walled square tube is offered the rectangular notch that length diminishes gradually on four sides; its length of side is by function f (x)=(9-x) a/8 changes; wherein a is that one deck module notch is long; x is the number of plies of place module, and this function, from the viewpoint of structure axial strength and lightweight two, strengthens the impact strength of installing in whole impact process; to meet energy absorption curve gradually, and energy-absorbing is steady, uniform high-efficiency;
(2) on thin-walled square tube inwall vertical welding, be with window formula thin plate, make whole device cross sectional shape be sphere of movements for the elephants shape, described band window formula thin plate length is identical with thin-walled square tube length, thickness is not more than thin-walled square tube thickness, on it, the notch shape of offering can be triangle, quadrangle or hexagon, quadrangle comprises square, rectangle, rhombus and trapezoidal, band window formula light gauge welding is respectively faced middle position at thin-walled square tube, each face of thin-walled square tube is offered respectively the notch of some layers of module of two row, as shown in Figure 3, in figure, on thin-walled square tube and with window formula thin plate, all have 5 number of modules rectangular notches,
(3) in thin-walled square tube, install another thin-walled band window square tube additional, the two is by boning or welding fixed, and the outer normal direction of outer normal direction each face corresponding to thin-walled square tube of each face of thin-walled band window square tube differs 45 °, each face of thin-walled band window square tube offers single-row rectangular notch, thin-walled square tube has two row rectangular notches, the two notch number of modules is identical, notch position and size are determined according to concrete actual condition, as shown in Figure 4, this type of mode has greatly strengthened the energy-absorbing efficiency of energy absorption device, and form framed structure on its cross-sectional plane, the stability of structure strengthens, in addition, in processing and manufacturing, relative simple and flexible.
But be not limited to above-mentioned 3 kinds of concrete modes, for example, by using board manufacturing process to change the intensity of the axial diverse location of thin-walled square tube, such as laser assembly solder technology or TRB technology, or thin-walled square tube changed into the form of Taper Pipe, etc.
On the tube wall of thin-walled square tube described in apparatus of the present invention, have notch, notch number, shape, position and concrete size etc. have a significant impact whole device energy-absorbing effect, and concrete numerical value is determined according to real impact energy size.
The rhombus notch thin-walled square tube of take is example, as shown in Figure 5, when collision occurs, huge axial impact force forces thin-walled square tube to deform, because the horizontal diagonal line of rhombus place thin-walled square tube intensity is minimum in the axial direction, be out of shape the easiliest, guiding device is produced herein and collapses distortion, and, the institute rhombus notch place that opens distortion energy-absorbing is not very large, thereby offer notch and be conducive to improve than energy-absorbing rate, reduce load uniformity coefficient, be that whole device performance is more excellent.As shown in Figure 6, in figure, for offering the thin-walled square tube of rectangular notch, be out of shape endergonic process.
In processing technology, energy absorption device of the present invention adopts steel, aluminium or other metallic material punching presses, is specially the thin plate first stamping out with the notch designing, and by bending fold, thin plate is become to a square tube by resistance spot-welded, type of attachment has various ways, as shown in Figure 7,8.
Below provide a specific embodiment of the present invention:
Described energy absorption device, thin-walled square tube length L is 200mm, and wall thickness d is 2mm, and cross section length of side c is 60mm.Thin-walled square tube is offered rectangular notch, and the long a of notch is 20mm, and high b is 30mm, apart from two lateral extent e, is 5mm, and single belt window module height H is 40mm.
Although at length disclose the present invention with reference to accompanying drawing, it should be understood that these descriptions are only exemplary, be not used for limiting application of the present invention.Protection scope of the present invention is limited by accessory claim, and can be included in various modification, remodeling and the equivalents of doing for invention in the situation that does not depart from protection domain of the present invention and spirit.
Claims (9)
1. be with window formula thin-walled square tube energy absorption device for one kind, it is characterized in that, this energy absorption device is a thin-walled square tube, it is provided with N layer band window module vertically, and row or multiple row notch are all opened in every layer of band window module four sides, and band window number of modules N value is between 4 to 8, notch shape can be triangle, quadrangle or hexagon, described thin-walled square tube length L is 150-200mm, and wall thickness d is 0.5-5mm, and cross section length of side c is 40-70mm.
2. energy absorption device as claimed in claim 1, is characterized in that, described thin-walled square tube is offered rectangular notch, and the long a of notch is 20mm, and high b is 30mm, apart from two lateral extent e, is 5mm, and single belt window module height H is 40mm.
3. energy absorption device as claimed in claim 1, is characterized in that, wherein, when notch shape is quadrangle, this quadrangle comprises square, rectangle, rhombus or trapezoidal.
4. energy absorption device as claimed in claim 1, it is characterized in that, wherein when notch shape is quadrangle, described thin-walled square tube has the square notch that the length of side diminishes gradually on four sides, its length of side is by function f (x)=(9-x) a/8 changes, wherein a is one deck module notch length of side, and x is the number of plies of place module.
5. band window formula energy absorption device according to claim 1, it is characterized in that, every layer of band window module four sides all has two row notches; on thin-walled square tube inwall vertical welding, be with window formula thin plate; described band window formula thin plate length is identical with thin-walled square tube length, offers notch shape and can be triangle, quadrangle or hexagon on band window formula thin plate.
6. energy absorption device as claimed in claim 5, is characterized in that, the window formula thin plate orthogonal setting of two bands, and by their integral solder in thin-walled square tube inwall, make whole energy absorption device cross sectional shape be sphere of movements for the elephants shape.
7. band window formula energy absorption device according to claim 1, it is characterized in that: every layer of band window module four sides all has two row notches; in thin-walled square tube, install another built-in thin-walled band window square tube additional; the two is fixed by welding, and the outer normal direction of outer normal direction each face corresponding to thin-walled square tube of each face of thin-walled band window square tube differs 45 °.
8. energy absorption device as claimed in claim 7, is characterized in that, each face of thin-walled band window square tube offers single-row rectangular notch, and thin-walled square tube has two row rectangular notches, and the two notch number of modules is identical.
9. an energy absorption device as described in one of claim 1 to 8, this energy absorption device is for the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310669460.9A CN103625401B (en) | 2013-12-10 | 2013-12-10 | A kind of band window thin-wall square tube energy absorption device |
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| CN201310669460.9A CN103625401B (en) | 2013-12-10 | 2013-12-10 | A kind of band window thin-wall square tube energy absorption device |
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| CN103625401A true CN103625401A (en) | 2014-03-12 |
| CN103625401B CN103625401B (en) | 2015-08-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108778846A (en) * | 2016-02-09 | 2018-11-09 | 戈登·默里设计有限公司 | Impact energy absorbing structure |
| CN109263584A (en) * | 2018-10-12 | 2019-01-25 | 大连理工大学 | A kind of local surfaces nanosizing metal thin-wall energy absorption device of tandem |
| CN109305120A (en) * | 2018-03-07 | 2019-02-05 | 华中科技大学 | A kind of more born of the same parents' acceptor of energies of assembled self-locking type |
| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112982246A (en) * | 2021-03-16 | 2021-06-18 | 长沙理工大学 | Crash pad energy-absorbing box |
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| EP1241078A1 (en) * | 2001-03-15 | 2002-09-18 | Dana Corporation | Method of manufacturing a vehicle body and frame assembly including an energy absorbing structure |
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| CN201685879U (en) * | 2010-04-02 | 2010-12-29 | 苏州市职业大学 | Collision energy absorption structure and automobile longitudinal beam |
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Patent Citations (8)
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| US5853195A (en) * | 1997-01-16 | 1998-12-29 | Ford Global Technologies, Inc. | Front rail assembly for a vehicle |
| JPH1129064A (en) * | 1997-07-09 | 1999-02-02 | Kobe Steel Ltd | Energy absorbing member excellent in axial collapse characteristic, formed of alluminium alloy extruded structural angle material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108778846A (en) * | 2016-02-09 | 2018-11-09 | 戈登·默里设计有限公司 | Impact energy absorbing structure |
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| CN109305120A (en) * | 2018-03-07 | 2019-02-05 | 华中科技大学 | A kind of more born of the same parents' acceptor of energies of assembled self-locking type |
| CN109263584A (en) * | 2018-10-12 | 2019-01-25 | 大连理工大学 | A kind of local surfaces nanosizing metal thin-wall energy absorption device of tandem |
| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112249509B (en) * | 2020-09-01 | 2022-08-02 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112982246A (en) * | 2021-03-16 | 2021-06-18 | 长沙理工大学 | Crash pad energy-absorbing box |
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| CN103625401B (en) | 2015-08-19 |
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