CN108194545A - A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof - Google Patents
A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof Download PDFInfo
- Publication number
- CN108194545A CN108194545A CN201810035896.5A CN201810035896A CN108194545A CN 108194545 A CN108194545 A CN 108194545A CN 201810035896 A CN201810035896 A CN 201810035896A CN 108194545 A CN108194545 A CN 108194545A
- Authority
- CN
- China
- Prior art keywords
- thin
- thick
- absorbing
- tube
- wall
- Prior art date
- 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.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 99
- 230000003139 buffering effect Effects 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims description 16
- 230000004323 axial length Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 238000005482 strain hardening Methods 0.000 claims description 11
- 238000010146 3D printing Methods 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000750 progressive effect Effects 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 125000000174 L-prolyl group Chemical group [H]N1C([H])([H])C([H])([H])C([H])([H])[C@@]1([H])C(*)=O 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 238000013524 data verification Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000110 selective laser sintering Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
-
- 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
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/02—Machine tools for performing different machining operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/06—Grooving involving removal of material from the surface of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
The invention belongs to collide and energy absorption field, a kind of gradient width cutting buffering energy-absorbing element is specifically disclosed, including several thick-walled pipes and at least one thin-wall tube；Thick-walled pipe setting axially spaced with thin-wall tube simultaneously connects into an entirety, and the inner tube central axis of thick-walled pipe is overlapped with the inner tube central axis of thin-wall tube；Each thin-wall tube both ends are respectively connected with thick-walled pipe, the radial thickness all same of all thin-wall tubes, the axial lengths of different thin-wall tubes graded in an axial direction.Thick-walled pipe and the thin-wall tube of the present invention axially spaced set simultaneously connects into an entirety, the radial thickness all same of all thin-wall tubes, the axial lengths of different thin-wall tubes graded in an axial direction so that conquassation gauffer occurs for one section to most short one section successively from longest；So that the position that conquassation gauffer occurs more accurately controls.
Description
Technical field
The invention belongs to collide and energy absorption field, and in particular to a kind of gradient width cutting buffering energy-absorbing element.
Background technology
In the Practical Projects such as aerospace, automobile, rail vehicle, highway anticollision facility, nuclear power station, buffering energy-absorbing
The energy absorption behavior of element plays the safety for bearing impact structure crucial effect.Due to the needs of security protection, delay
The features such as good energy-absorbing effect, light weight, long crush stroke need to be had by rushing power-absorbing, and structure type must be simple as possible and easy
In industry manufacture and batch production.
At present, traditional buffering energy-absorbing element is based on thin-wall member, wherein the axial collapse energy-absorption of thin-walled tubes component
It is considered as one of most effective way, and most common thin-wall tube cross sectional shape has round, rectangular, hat shape etc..Through experiment and
Theoretical validation, energy-absorbing effect of the circular section thin-wall tube under same operating mode are substantially better than other types of thin-wall tube.It is however, traditional
Non-axis symmetry unstability easily occurs in Collapse of Concrete for circular section pipe, and the advantage of existing multistage conquassation is can be according to shock
The part that the different selections of power are crushed by structure.
However, most existing endergonic structure, on the one hand, can not effectively control the generation position of energy absorbing tube conquassation gauffer
It puts, there are a large amount of uncertainties, this will generate unpredictalbe hidden danger in collision process.On the other hand, with regard to current skill
For art present situation, much theoretically the preferable structure of energy-absorbing effect is difficult to produce in batches and involve great expense.
Invention content
For problems of the prior art, the present invention provides a kind of gradient width cutting buffering energy-absorbing element and its system
Preparation Method；The generation position of conquassation gauffer and easy to manufacture can be accurately controlled.
The present invention is to be achieved through the following technical solutions：
A kind of gradient width cutting buffering energy-absorbing element, which is characterized in that including several thick-walled pipes and at least one thin-walled
Pipe；Thick-walled pipe setting axially spaced with thin-wall tube simultaneously connects into an entirety, the inner tube central axis and thin-walled of thick-walled pipe
The inner tube central axis of pipe overlaps；Each thin-wall tube both ends are respectively connected with thick-walled pipe, the radial thickness all same of all thin-wall tubes,
The axial length of different thin-wall tubes graded in an axial direction.
The internal diameter all same of the thick-walled pipe and thin-wall tube.
The section of the thick-walled pipe and thin-wall tube is all provided with being set to round or rectangle or ellipse.
The thickness all same of each thick-walled pipe.
The axial length dimension of the difference thin-wall tube is in the axial direction in arithmetic progression or Geometric Sequence variation setting.
A kind of preparation method, which is characterized in that prepare the power-absorbing using machinery cold working.
The machinery cold working is the processing method combined by lathe or milling machine or both, is carved in the outer tube surface of tubing
Slot forms the form that thick-walled pipe and thin-wall tube are spaced apart, is finally processed into the power-absorbing.
A kind of preparation method, which is characterized in that the power-absorbing is prepared using 3D printing, for solid-state metallic material
Power-absorbing is prepared using laser sintered method, and the power-absorbing of solid-state nonmetallic materials is prepared using Stereolithography method.
The solid-state nonmetallic materials are PVC or resin.
Compared with prior art, the present invention has technique effect beneficial below：
The setting axially spaced with thin-wall tube of the thick-walled pipe of the present invention simultaneously connects into an entirety, the diameter of all thin-wall tubes
To thickness all same, the axial lengths of different thin-wall tubes graded in an axial direction so that conquassation gauffer is from one section of longest to most short
One section occurs successively；So that the position that conquassation gauffer occurs more accurately controls.The easy batch micro operations of power-absorbing of the present invention, and
And low, low cost is required to material category.
Further, the internal diameter all same of thick-walled pipe of the invention and thin-wall tube, internal diameter it is identical so that power-absorbing by
Power is more stablized, and position occurs for conquassation gauffer more can be it is anticipated that position occurs.
Further, the section of thick-walled pipe of the invention and thin-wall tube is all provided with being set to round or rectangle or ellipse, round
Or rectangle or elliptical shape rule, stability under loading, conquassation gauffer generation position more can be it is anticipated that position generations.
Further, the thickness all same of each thick-walled pipe of the invention, the thin-wall tube of same thickness cause manufacture more
Convenient, stress is more stablized.
Further, the axial length dimension of different thin-wall tubes of the invention in arithmetic progression or is waited than number in the axial direction
Row variation setting changes in arithmetic progression or Geometric Sequence so that variation flow function variation, it is convenient to prepare, and position occurs for conquassation gauffer
It puts and is more prone to control.
Further, the invention also discloses a kind of preparation methods, prepare the power-absorbing using machinery cold working, make
It makes conveniently.
Further, machinery cold working of the invention is the outer tube surface cutting in tubing, is formed between thick-walled pipe and thin-wall tube
Every the form of distribution, this processing method convenient material drawing directly is cold worked to obtain by the seamless pipe of commercial type, without
Manufacture is re-molded, manufacture is at low cost.
Further, use 3D printing of the invention prepares the power-absorbing, the power-absorbing of 3D printing, manufacture essence
Really, complex-shaped power-absorbing can be manufactured, meets the requirement of power-absorbing use site.
Further, solid-state nonmetallic materials of the invention are PVC or resin, and material property is reliable, and energy-absorbing effect is good.
Description of the drawings
Fig. 1 is the side schematic view of gradient width cutting buffering energy-absorbing element of the present invention；
Fig. 2 is that the present invention is common circular section of the one corresponding gradient width cutting energy absorbing tube of the embodiment of the present invention with size
The non-axis symmetry conquassation pattern that energy absorbing tube axial compression generates.
Fig. 3 is that one corresponding gradient width cutting energy absorbing tube of the embodiment of the present invention is axial with the uniform cutting energy absorbing tube of size
Be pressurized the discontinuous conquassation pattern generated.
Fig. 4 is the continuous progressive conquassation mould that gradient width cutting energy absorbing tube axial compression generates in the embodiment of the present invention one
Formula.
Fig. 5 is with common circular section energy absorbing tube, uniform cutting energy absorbing tube, gradient width under size in the embodiment of the present invention one
Power-displacement curve when cutting energy absorbing tube is axially crushed.
Fig. 6 is the cross-sectional view of gradient width cutting square tube in the embodiment of the present invention two.
In figure：1 is thin-wall tube, and 2 be thick-walled pipe, and L is pipe range, DOFor heavy wall pipe outside diameter, DIFor heavy wall bore, W is heavy wall
The axial length of pipe, w0For the initial axial length of thin-wall tube, wiFor the axial length of i-th of thin-wall tube, wi+1It is thin for i+1
The axial length of wall pipe, d are groove depth.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, and described is explanation of the invention rather than limit
It is fixed.
Referring to Fig. 1-6；A kind of gradient width cutting buffering energy-absorbing element, which is characterized in that including several thick-walled pipes 2 and extremely
A few thin-wall tube 1；The setting axially spaced with thin-wall tube 1 of thick-walled pipe 2 simultaneously connects into an entirety, the inner tube of thick-walled pipe 2
Central axis is overlapped with the inner tube central axis of thin-wall tube 1；Each 1 both ends of thin-wall tube are respectively connected with thick-walled pipe 2, all thin-wall tubes
1 radial thickness all same, the axial lengths of different thin-wall tubes 1 graded in an axial direction.
The internal diameter all same of the thick-walled pipe 2 and thin-wall tube 1.
The section of the thick-walled pipe 2 and thin-wall tube 1 is all provided with being set to round or rectangle or ellipse.
The thickness all same of each thick-walled pipe 2.
The axial length dimension of the difference thin-wall tube 1 is in the axial direction in arithmetic progression or Geometric Sequence variation setting.
A kind of preparation method, which is characterized in that prepare the power-absorbing using machinery cold working.
The machinery cold working is the processing method combined by lathe or milling machine or both, is carved in the outer tube surface of tubing
Slot forms the form that thick-walled pipe 2 and thin-wall tube 1 are spaced apart, is finally processed into the power-absorbing.
A kind of preparation method, which is characterized in that the power-absorbing is prepared using 3D printing, for solid-state metallic material
Power-absorbing is prepared using laser sintered method, and the power-absorbing of solid-state nonmetallic materials is prepared using Stereolithography method.
The solid-state nonmetallic materials are PVC or resin.
The outer tube of thick-walled pipe 2 that the outer tube of thin-wall tube 1 is connect with its both ends is axially formed cutting space；Cutting width etc.
In 1 axial length of thin-wall tube, groove depth is heavy wall tube thickness and the difference of thin-walled tube thickness.
The gradient width cutting buffering energy-absorbing element be gradient width cutting energy absorbing tube, the gradient width cutting energy-absorbing
Pipe includes several alternatively distributed cuttings and heavy wall in an axial direction, wherein the of same size of each thick wall part, wall thickness are identical, each
The depth of cutting is identical, and width is gradually changed along one end of pipe with scheduled gradient, and thick wall part is always located in the gradient
The both ends of width cutting energy absorbing tube.
Further, the section of the gradient width cutting energy absorbing tube can be the arbitrary geometric forms such as circle, rectangle, ellipse
Shape.
Further, the metal materials such as stainless steel, aluminium alloy can be used in the gradient width cutting energy absorbing tube, can also be used
The nonmetallic materials such as PVC, resin.
Further, the gradient width cutting energy absorbing tube bears the mode hit as axially and in a certain angle with the axis
Oblique impact, and the both ends of pipe can bear impact force.
Further, any numerical value more than 1 may be selected in the cutting number N of the gradient width cutting energy absorbing tube.
Further, the representation method of the gradient η can be arithmetic progression η=wi+1-wi, Geometric SequenceOr its
It leads to the function or ordered series of numbers of whole cutting width generation inhomogeneous broadening effect, wherein wiFor i-th of cutting, wi+1It is carved for i+1
Slot.
Further, geometric parameter of the gradient width cutting energy absorbing tube in wall thickness direction should meet equation t+d=T,
Wherein d is groove depth, and t is the wall thickness at cutting, and T is the wall thickness of thick wall part.
Further, the preparation method of the gradient width cutting energy absorbing tube is machinery cold working and 3D printing method.
Further, the machinery cold working preparation method of the gradient width cutting energy absorbing tube can follow following steps：
S1, according to actually required cross sectional shape and sectional dimension purchase seamless pipe it is spare；
S2, the seamless pipe of purchase is cut according to actually required pipe range；
S3, the seamless pipe cut is subjected to cutting processing by lathe (lathe, milling machine etc.) according to required gradient；
S4, the gradient width cutting energy absorbing tube of completion of processing is polished, removes flash removed.
Further, the 3D printing preparation method of the gradient width cutting energy absorbing tube can follow following steps：
S1, the three-dimensional data mould that gradient width cutting energy absorbing tube is established using CAD softwares such as Solidworks, UG, Pro/E
Type；
S2, the S1 gradient width cutting energy absorbing tube three-dimensional data models established are converted to what can be identified by 3D printer
Stl forms；
S3, by S2 generation stl form mode input 3D printers and using selective laser sintering process (mainly for gold
Belong to material) or Stereolithography method (mainly for nonmetallic materials) progress 3D printing；
S4, the good gradient width cutting energy absorbing tube of 3D printing is taken out, and brush away all residual powders from machine.
In addition, in subsequent embodiment, selected geometric parameter and FEM Numerical Simulation have test data
Verification can fully ensure that the accuracy of result.
The technique effect of the present invention
Applicant of the present invention compared buffering energy-absorbing element of the present invention and tradition in subsequent embodiment one
The energy-absorbing effect of pipe and uniform cutting pipe during quasi-static collapse and conquassation pattern, gradient width of the present invention
Cutting energy absorbing tube has the mode of preferable energy-absorbing effect and progressive conquassation.The structure can be at the cutting of width numerical value maximum most
It is first crushed, and is gradually deformed in the form of progressive conquassation.It can be further enhanced by rationally designing its geometric parameter
Energy absorbing efficiency realizes structure lightened design.
Product structure of the present invention is simple, and assembling capacity is strong, can be independent buffering energy-absorbing element, under special-purpose,
Multiple gradient width cutting buffering energy-absorbing elements can be achieved to cooperate.
Product preparation process of the present invention is simple, directly can be cold worked to obtain by the seamless pipe of commercial type, without
Re-mold manufacture.Meanwhile the candidate materials of product of the present invention are extensive, and the metal materials such as stainless steel, aluminium alloy can be used, also may be used
Using nonmetallic materials such as PVC, resins.
Embodiment one
As shown in Figure 1, in the present embodiment, gradient width cutting buffering energy-absorbing element is inhaled for gradient width cutting circular section
Can pipe (abbreviation gradient width cutting pipe), material is mild steel, and the width w of cutting changes (η according to the form of arithmetic progression
=wi+1-wi=3.36mm).To verify the advantage of gradient width cutting pipe, its common circular section with same size, material is inhaled
It can manage and uniform cutting pipe is compared, analyze energy-absorbing effect of the energy absorbing tube of three types under axial quasi-static collapse operating mode
Fruit, the specific size that the present embodiment is chosen is as shown in table 1, and the unit of geometric parameter is (mm) in table.
Table 1
Verifying the superiority of gradient width cutting pipe of the present invention need to be had by Abaqus/Explicit softwares
The first l-G simulation test of limit, wherein, finite element simulation parameter setting is as follows：
Common pipe, uniform cutting pipe, gradient width cutting Guan Jun are prepared using mild steel, and density is 7.8g/cm3,
Elasticity modulus is 210GPa, and Poisson's ratio is 0.3, and material yield strength is 372MPa, and material limits intensity is
526MP.The bottom of pipe is positioned on a fixed rigid plate, and another rigid plate is from the direction to collide with 1mm/min's
Constant speed is loaded, it is therefore an objective to study the energy absorption characteristics of three classes energy absorbing tube and conquassation under low velocity impact by quasi-static test
Pattern.Three classes pipe uses the universal contact based on penalty function method with rigid plate in calculating, and friction factor takes 0.15.To ensure
Computational efficiencies of the Abaqus/Explicit under quasi-static collapse is combined using system lowest-order mode with smooth amplitude curve
Mode improve calculating speed.
Fig. 2 is the conquassation mode of common circular section energy absorbing tube, can be visually observed that non-axis symmetry unstability has occurred for pipe.
Since the randomness of pipe non-axis symmetry conquassation pattern is relatively low compared with strong and energy absorption efficiency, for vehicle or bumper etc. more
Larger uncertainty can be generated during the power-absorbing of fine structure.When pipe range further increases, it is also possible to occur less
Stable Euler's buckling pattern.Therefore, in the design of such power-absorbing because avoid as possible generate pipe non-axis symmetry pressure
The pattern of bursting.
Fig. 3 is the conquassation mode of uniform cutting energy absorbing tube, can be visually observed that uniform cutting pipe compares in Collapse of Concrete
Common pipe is more stablized, and axial symmetry conquassation pattern occurs for all thin-walled portions.However, uniformly cutting energy absorbing tube is crushed
Position it is more difficult to control, from the figure 3, it may be seen that the position being crushed at first is located at second cutting of loading end, press for second
It bursts and is happened at first cutting of loading end, be secondly crushed second cutting etc. of fixing end.Therefore, this endergonic structure is being protected
The randomness of gauffer generating unit when not solving conquassation while demonstrate,proving stability still.
Fig. 4 is the conquassation mode of gradient width cutting energy absorbing tube, can be visually observed that gradient width cutting pipe is having
While uniform cutting pipe stability advantages, it can also stablize the deformation pattern to form axial progressive conquassation.As shown in Figure 4, at first
The position being crushed is located at first most wide cutting of fixing end, and it is second time wide that second of conquassation is happened at fixing end
At cutting, as rule, subsequent conquassation occurs each along the direction that cutting width gradually decreases.It is carved for contrast gradient's width
The energy absorption capability of barrel and uniform cutting pipe, table 2 summarize the data that force-displacement curve is presented in Fig. 5, and gradient width is carved
For total energy-absorbing of barrel 3.36% more than uniform cutting pipe, the conquassation distance of gradient width cutting pipe is fewer than uniform cutting pipe
0.27%, the average crushing force of gradient width cutting pipe is 3.63% more than uniform cutting pipe.
Table 2
The cold working preparation method of gradient width cutting energy absorbing tube can follow following steps in the present embodiment：
The mild steel seamless pipe that S1, the commercially available wall thickness of purchase are 4mm is several spare；
S2, the size according to table 1 cut seamless pipe according to regulation pipe range L=144mm；
S3, by the seamless pipe cut by lathe according to cutting feature (N=5, d=2.5mm, w described in table 10=
10.08mm, η=wi+1-wi=3.36mm) it is processed to obtain gradient width cutting pipe.
S4, the gradient width cutting energy absorbing tube of completion of processing is polished, removes flash removed.
In conclusion compared to the uniform cutting pipe of same size, gradient width cutting pipe is in small elevation energy absorption efficiency
While, additionally it is possible to deformation pattern more stablize, controllable is provided.In addition, the gradient width cutting pipe described in the present embodiment
Also processing is simple, low-cost advantage.
It should be noted that the present embodiment highlights same size Gradient width cutting pipe as energy absorbing device
Superiority does not optimize its geometric parameter.Therefore, gradient width cutting energy absorbing tube proposed by the present invention can be carried out several
What parameter optimization is to improve its energy absorption characteristics.
Embodiment two
In the present embodiment, gradient width cutting buffering energy-absorbing element is gradient width cutting square section energy absorbing tube (abbreviation
Gradient width cutting square tube), which is crushed for practical energy-absorbing mode to be axial, and material is 6063 aluminium alloys, and section is
Square (Fig. 6), and the width w of cutting changes according to the form of Geometric SequenceThe present embodiment is chosen
Specific size and parameter it is as shown in table 3, the unit of geometric parameter is (mm) in table.
Table 3
The cold working preparation method of gradient width cutting square tube can follow following steps in this example：
The 6063 aluminium alloy seamless square tubes that S1, the commercially available wall thickness of purchase are 4mm are several spare；
S2, the size according to table 3 cut seamless pipe according to regulation pipe range L=131.25mm；
S3, by the seamless square tube cut by milling machine according to cutting feature (N=4, d=2.0mm, w described in table 30=
10mm,) be processed to obtain gradient width cutting energy absorbing tube.
S4, the gradient width cutting square tube of completion of processing is polished, removes flash removed.
More than content is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within claims of the present invention
Protection domain within.
Claims (9)
1. a kind of gradient width cutting buffering energy-absorbing element, which is characterized in that including several thick-walled pipes (2) and at least one thin-walled
It manages (1)；Thick-walled pipe (2) setting axially spaced with thin-wall tube (1) simultaneously connects into an entirety, in the inner tube of thick-walled pipe (2)
Mandrel line is overlapped with the inner tube central axis of thin-wall tube (1)；Each thin-wall tube (1) both ends are respectively connected with thick-walled pipe (2), all thin
The radial thickness all same of wall pipe (1), the axial lengths of different thin-wall tubes (1) graded in an axial direction.
2. gradient width cutting buffering energy-absorbing element according to claim 1, which is characterized in that the thick-walled pipe (2) with
The internal diameter all same of thin-wall tube (1).
3. gradient width cutting buffering energy-absorbing element according to claim 1, which is characterized in that the thick-walled pipe (2) with
The section of thin-wall tube (1) is all provided with being set to round or rectangle or ellipse.
4. gradient width cutting buffering energy-absorbing element according to claim 1, which is characterized in that each thick-walled pipe
(2) thickness all same.
5. gradient width cutting buffering energy-absorbing element according to claim 1, which is characterized in that the difference thin-wall tube
(1) axial length dimension is in the axial direction in arithmetic progression or Geometric Sequence variation setting.
6. the preparation method of the gradient width cutting buffering energy-absorbing element according to claim 1-5 any one, feature
It is, the power-absorbing is prepared using machinery cold working.
7. gradient width cutting buffering energy-absorbing element according to claim 6, which is characterized in that the machinery, which is cold worked, is
The processing method combined by lathe or milling machine or both in the outer tube surface cutting of tubing, forms thick-walled pipe (2) and thin-wall tube
(1) form being spaced apart finally is processed into the power-absorbing.
8. the preparation method of the gradient width cutting buffering energy-absorbing element according to claim 1-5 any one, feature
It is, the power-absorbing is prepared using 3D printing, the power-absorbing of solid-state metallic material is prepared using laser sintered method,
The power-absorbing of solid-state nonmetallic materials is prepared using Stereolithography method.
9. gradient width cutting buffering energy-absorbing element according to claim 8, which is characterized in that the solid-state non-metallic material
Expect for PVC or resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035896.5A CN108194545A (en) | 2018-01-15 | 2018-01-15 | A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035896.5A CN108194545A (en) | 2018-01-15 | 2018-01-15 | A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194545A true CN108194545A (en) | 2018-06-22 |
Family
ID=62589455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810035896.5A Pending CN108194545A (en) | 2018-01-15 | 2018-01-15 | A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966330A (en) * | 2018-09-30 | 2020-04-07 | 上海微电子装备（集团）股份有限公司 | Combined reed, design method thereof and motion platform |
| CN111002932A (en) * | 2018-10-05 | 2020-04-14 | 戴弗根特技术有限公司 | Apparatus and method for additive manufacturing of structures with increased energy absorption properties |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429758A (en) * | 2001-12-26 | 2003-07-16 | 株式会社日立制作所 | Buffer for elevator |
| US20040200255A1 (en) * | 2001-04-04 | 2004-10-14 | Colin Newport | Method of manufacturing structural components from tube blanks of variable wall thickness |
| CN103736811A (en) * | 2014-01-23 | 2014-04-23 | 哈尔滨工业大学 | Method of manufacturing equal wall thickness variable-diameter pipe fittings out of axial unequal-wall-thickness pipe blanks |
| CN103180192B (en) * | 2010-11-19 | 2015-09-30 | 川崎重工业株式会社 | The impact energy absorb body of railway vehicle |
-
2018
- 2018-01-15 CN CN201810035896.5A patent/CN108194545A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040200255A1 (en) * | 2001-04-04 | 2004-10-14 | Colin Newport | Method of manufacturing structural components from tube blanks of variable wall thickness |
| CN1429758A (en) * | 2001-12-26 | 2003-07-16 | 株式会社日立制作所 | Buffer for elevator |
| CN103180192B (en) * | 2010-11-19 | 2015-09-30 | 川崎重工业株式会社 | The impact energy absorb body of railway vehicle |
| CN103736811A (en) * | 2014-01-23 | 2014-04-23 | 哈尔滨工业大学 | Method of manufacturing equal wall thickness variable-diameter pipe fittings out of axial unequal-wall-thickness pipe blanks |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966330A (en) * | 2018-09-30 | 2020-04-07 | 上海微电子装备（集团）股份有限公司 | Combined reed, design method thereof and motion platform |
| CN110966330B (en) * | 2018-09-30 | 2021-08-20 | 上海微电子装备（集团）股份有限公司 | Combined reed, design method thereof and motion platform |
| CN111002932A (en) * | 2018-10-05 | 2020-04-14 | 戴弗根特技术有限公司 | Apparatus and method for additive manufacturing of structures with increased energy absorption properties |
| CN111002932B (en) * | 2018-10-05 | 2023-04-07 | 戴弗根特技术有限公司 | Energy absorbing structure for additive manufacturing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207737238U (en) | A kind of gradient cutting buffering energy-absorbing structure | |
| Habib et al. | In-plane energy absorption evaluation of 3D printed polymeric honeycombs | |
| Wadley | Multifunctional periodic cellular metals | |
| CN108194545A (en) | A kind of gradient width cutting buffering energy-absorbing element and preparation method thereof | |
| Rezvani et al. | Axial crumpling of aluminum frusta tubes with induced axisymmetric folding patterns | |
| US10731565B2 (en) | Additive manufactured object with self-breaking support with fluid passage | |
| O’Neil et al. | Energy absorption behavior of filament wound CFRP origami tubes pre-folded in Kresling pattern | |
| Bai et al. | Crashworthiness optimal design of a new extruded octagonal multi-cell tube under dynamic axial impact | |
| Dziewit et al. | Mechanical response of additive manufactured regular cellular structures in quasi-static loading conditions–part I experimental investigations | |
| Agu | The effects of 3D printed material properties on shaped charge liner performance | |
| CN108357447A (en) | A kind of gradient cutting buffering energy-absorbing element and preparation method thereof | |
| Sur et al. | Applications, manufacturing and thermal characteristics of micro-lattice structures: current state of the art | |
| Djamaluddin et al. | Finite element analysis and crashworthiness optimization of foam-filled double circular under oblique loading | |
| Yuan et al. | Deformation and failure of additively manufactured Voronoi foams under dynamic compressive loadings | |
| Kim et al. | Optimal design of spaced plates under hypervelocity impact | |
| CN108266480A (en) | A kind of gradient depth cutting buffering energy-absorbing element and preparation method thereof | |
| Chi-Hsiang et al. | The optimal design of micro end mill for milling SKD61 tool steel | |
| Choirotin et al. | Deformation mode and energy absorption analysis of bi-tubular corrugated crash box structure | |
| Ibrahim et al. | Optimization of interlocking structures made of flax fibre composites to improve its energy absorption capability | |
| Singh et al. | Finite element modeling of backward flow forming of Ti6Al4V alloy | |
| Kumar et al. | Computational Analyses to Support Design of Hollow Cylinder Flare Experiments at AEDC Hypervelocity Tunnel 9 | |
| Saad et al. | Role of simulation in metal forming processes | |
| Segade et al. | Study of a crash box design optimized for a uniform load profile | |
| Haridas et al. | Modelling and simulation of single and multi-pass flow forming to investigate the influence of process parameters on part accuracy | |
| Ghazali et al. | Crushing modes of aluminium tubes under axial compression using finite element analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180622 |
|
| WD01 | Invention patent application deemed withdrawn after publication |