CN205236805U - Car energy -absorbing structure hot formed stamping device - Google Patents

Car energy -absorbing structure hot formed stamping device Download PDF

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Publication number
CN205236805U
CN205236805U CN201521127817.1U CN201521127817U CN205236805U CN 205236805 U CN205236805 U CN 205236805U CN 201521127817 U CN201521127817 U CN 201521127817U CN 205236805 U CN205236805 U CN 205236805U
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CN
China
Prior art keywords
die
punch
sheet
absorbing
combined
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CN201521127817.1U
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Chinese (zh)
Inventor
庄蔚敏
徐纪栓
解东旋
敖文宏
杨冠男
刘西洋
闫雪燕
李冰娇
胡哲
张凯希
郭帅
李晓鹏
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吉林大学
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Priority to CN201521127817.1U priority Critical patent/CN205236805U/en
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Publication of CN205236805U publication Critical patent/CN205236805U/en

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Abstract

The utility model discloses a car energy -absorbing structure hot formed stamping device, including the combination die, the combination die includes the inseparable fixed connection's of multi -disc concave die, the combination terrace die, its set up in the top of combination die, the combination terrace die includes the inseparable fixed connection's of multi -disc protruding die, the blank holder, its set up in combination die top for compress tightly and take the punching press steel sheet, actuating mechanism, its respectively with combination terrace die and blank holder are connected, the drive combination terrace die and blank holder move down and carry out the punching press operation, wherein, be provided with cooling channel in concave die and/or the protruding die. The utility model discloses in since every mould all have solitary cooling channel for cooling speed has had very big regulation space, thereby can realize the optimum distribution of multiple intensity and intensity as required.

Description

A kind of automobile energy-absorbing structure hot forming decompressor

Technical field

The utility model relates to high-strength steel hot forming technical field, particularly a kind of multiple combined-type automobileEndergonic structure hot forming decompressor.

Background technology

Automobile makes to alleviate car weight with the appearance of super-high strength steel, reduces oil consumption, reduces discharge and improves safetyProperty is unified. It is strong that hot press-formed (below referred to as " hot forming ") of super-high strength steel solved superelevationThe difficult processing of steel cold forming plate, the problem such as after cold working resilience is large, and also part is be shaped can after quenchingObtain higher intensity. But can not meeting energy absorption capacity conventionally, wants the safety component with uniform high strength degreeAsk, the not necessarily collision energy-absorbing effect of lift structure to greatest extent of the high parts of intensity, rationallyStructural strength distribute and just can improve deformation tendency and the energy absorption characteristics of part. As: center body pillar addsStrong plate, the intensity of its upper end design should be very high, and percentage elongation is lower, and the intensity of lower end design should be very low,Percentage elongation is higher. Like this, in the time that center body pillar is subject to side collision, because stiffener lower end is softer,First produce distortion, guiding impact force sill strip direction is downwards transmitted, and (takes advantage of thereby reduce B post upper endMember chest level position) the intrusion amount in passenger protection district. Front anticollision beam of automobile, it is strong that its middle part is designedDegree should be very high, and percentage elongation is lower, and the intensity of two ends design should be lower, and percentage elongation is higher. Like this,The middle part energy proof strength requirement that stress is larger in the time of automobile central collision, can reach again best energy-absorbing effect simultaneouslyReally. Existing automobile energy-absorbing mechanism forming technology has developed selective cooling, selective heating, local returningThe techniques such as fire. The utility model has carried out creation and optimization for selective process for cooling, existing selectiveThere are three problems in process for cooling:

1. traditional cooling channel arrangement mode can only realize two or three different cooldown rate, makes intoTimber intensity after shape distributes more coarse, cannot reach optimum intensity distribution;

Traditional moulds manufacture complete after length just determine, complexity and the height manufactured in view of mould becomeThis, mfg. moulding die again in the time need to manufacturing the homotype part of different length, causes cost to improve;

3. when part shape is more complicated, there will be cooling badly, cause parts locally undercapacity or excessive.

Therefore, be necessary to design a kind of Combined impact pressure device, strong to ensure the best of automobile energy-absorbing structureDegree distributes, and avoids cooling bad problem simultaneously.

Utility model content

The utility model has been designed and developed a kind of automobile energy-absorbing structure hot forming decompressor, has solved existingAfter the hot forming of automobile energy-absorbing structure, not reasonably defect of intensity distribution, conveniently becomes the design of assembling dieThe part of shape different length has overcome the complicated shape parts locally cooldown rate that prior art exists simultaneouslyUneven problem.

The technical scheme that the utility model provides is:

A kind of automobile energy-absorbing structure hot forming decompressor, comprises

Combined die, it comprises the die sheet that multi-disc is closely fixedly connected with side by side;

Combined heave die, it arranges the top with described combined die, and described combined heave die comprises that multi-disc is arranged side by sideThe punch sheet being closely fixedly connected with;

Blank holder, it is arranged at described combined die top, for compressing steel plate to be punched;

Driving mechanism, it is connected with described combined heave die and blank holder respectively, drive described combined heave die andBlank holder moves down and carries out punching operation;

Wherein, in described die sheet and/or punch sheet, be provided with cooling duct, described die sheet and/or described inProtruding diaphragm forms multiple different cooled regions, and each region has different cooldown rates.

Preferably, described driving mechanism comprises the first hydraulic cylinder and the second hydraulic cylinder, described the first hydraulic pressureCylinder is connected with combined heave die, and described the second hydraulic cylinder is connected with blank holder.

Preferably, a side of described die sheet is provided with die groove, and opposite side is provided with die projection,Described die groove matches with die projection, and adjacent two die sheets are accurately located side by side;

One side of described punch sheet is provided with punch groove, and opposite side is provided with punch projection, described punchGroove matches with punch projection, and adjacent two punch sheets are accurately located side by side.

Preferably, between an adjacent company die sheet, be provided with heat shield; Between an adjacent company punch sheet, establishBe equipped with heat shield.

Preferably, the degree of depth of described die groove is greater than the height of described die projection, described heat shieldBe arranged in described die groove; The degree of depth of described punch groove is greater than the height of described punch projection, instituteStating heat shield is arranged in described punch groove.

Preferably, described die upper surface below and punch lower surface top are provided with temperature sensor.

Preferably, described combined die also comprises die socket, is provided with die and installs on described die socketGuide rail, described die sheet below is provided with die mounting groove, and described die mounting groove and described die are installedGuide rail coordinates; Described combined heave die also comprises convex mould base, is provided with punch mounting guide rail on described convex mould base,Described punch sheet top is provided with punch mounting groove, and described punch mounting groove and described punch mounting guide rail are joinedClose.

Preferably, described combined die also comprises die socket baffle plate, and it is fixed on one of described die socketSide, described die sheet is fixed by bolt and described die socket baffle plate; Described combined heave die also comprises punchSeat baffle plate, it is fixed on a side of described convex mould base, and described punch sheet is by bolt and described convex mould base gearPlate is fixed.

Compared with prior art the beneficial effects of the utility model are:

1, optimal strength distribution automobile bar shaped endergonic structure thermo shaping method described in the utility model and deviceCan realize the optimum intensity distribution of strip automobile energy-absorbing structure.

Traditional automobile bar shaped endergonic structure mould therefor is all two or three, cooling duct arrangementFor longitudinally, therefore can only realize two or three cooldown rate. The utility model designs by many sheet typesWith cooling duct transverse fit die surface arrangement, by regulating the cooling fluid stream of every cooling ductSpeed, allows bar shaped part different parts with different cooldown rate coolings, thereby realizes different intensity. ByThere is independent cooling duct in every die, make cooldown rate have very large adjusting space, therebyCan realize as required the Optimal Distribution of multiple intensity and intensity.

2, the utility model can be realized with part manufacture a series of but different length with a mold.

After traditional moulds manufacture completes, length is just determined, the complexity of manufacturing in view of mould and expensive,Mfg. moulding die again in the time need to manufacturing the homotype part of different length, causes cost to improve. This realityCan increase as required or reduce sheet number with novel multiple-piece mould structure, thereby realize different lengthThe hot forming of degree bar shaped endergonic structure.

3, the inhomogeneous problem of local cooldown rate when the utility model can improve complex parts hot forming.

Longitudinal arrangement of traditional moulds cooling duct there will be cooldown rate in the time that part shape is more complicatedInhomogeneous, cause parts locally undercapacity or excessive. Cooling duct of the present utility model transverse fitDie surface arrangement can ensure that the same cross section cooldown rate of bar shaped endergonic structure is consistent, and changesKind cooling bad problem.

Brief description of the drawings

Fig. 1 is automobile energy-absorbing structure hot forming decompressor general structure signal described in the utility modelFigure.

Fig. 2 is automobile energy-absorbing structure hot forming decompressor front view described in the utility model.

Fig. 3 is automobile energy-absorbing structure hot forming decompressor rearview described in the utility model.

Fig. 4 is the forward axonometric drawing of die sheet described in the utility model.

Fig. 5 is the backward axonometric drawing of die sheet described in the utility model.

Fig. 6 is that die sheet die sheet described in the utility model is at A-A place cutaway view.

Fig. 7 is convex mould base described in the utility model and convex mould base baffle arrangement schematic diagram.

Fig. 8 is the forward axonometric drawing of punch sheet described in the utility model.

Fig. 9 is the backward axonometric drawing of punch sheet described in the utility model.

Figure 10 is the cutaway view of punch sheet described in the utility model at B-B place.

Figure 11 is convex mould base described in the utility model and convex mould base baffle arrangement schematic diagram.

Figure 12 is that the axle after automobile energy-absorbing structure hot forming decompressor described in the utility model punching press is surveyedFigure.

Figure 13 is facing after automobile energy-absorbing structure hot forming decompressor described in the utility model punching pressFigure.

Figure 14 is the backsight after automobile energy-absorbing structure hot forming decompressor described in the utility model punching pressFigure.

Figure 15 is the hot formed continuous cooling CCT curve of material 22MnB5 described in the utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail, to make those skilled in the artCan implement according to this with reference to description word.

As shown in Figure 1, the utility model provides a kind of automobile automobile energy-absorbing structure hot forming decompressor,Comprise lower mechanisms, upper mechanism, combined die, combined type punch and blank holder. Its middle and lower part machineStructure, upper mechanism have formed the support of this device, and combined die is fixed on lower mechanisms, and combined type is protrudingMould and blank holder are installed on upper mechanism.

Consult in the lump Fig. 2, Fig. 3, described lower mechanisms comprises the support column that base 110 is identical with four21 0 of 120, four identical support columns are in 110 4 edges of base, and support column 120Bottom surface is welded on base 110. Described lower mechanisms is connected with ground by bed bolt 160.

Described upper mechanism comprises the first hydraulic cylinder 140 of top board 130, two same sizes and fourThe second hydraulic cylinder 150 of same size. The first hydraulic cylinder 140 and the second hydraulic cylinder 150 are all welded on topOn plate 130, top board 130 is welded on and supports on 120, thereby realizes upper mechanism and lower mechanismsConnect.

Combined die is bolted on base 110. Combined type punch is threaded connectionOn one hydraulic cylinder 140. Blank holder 400 is threaded connection on the second hydraulic cylinder 150.

Described combined die is by die socket 210, die socket baffle plate 220, die sheet 230 and twoDie connecting bolt 240 forms. Die socket 210 is fixed on base plate 110 by bed bolt 160.Die socket baffle plate 220 is welded on a side of die socket 210, and multi-disc die sheet 230 is sequentially arranged in dieOn seat 210, also with die connecting bolt 240, multi-disc die sheet 230 is fixed on die socket baffle plate 16.

Described combined type punch is by convex mould base 310, convex mould base baffle plate 320, punch sheet 330 and onePunch connecting bolt 340 forms. Convex mould base 310 is fixedly connected with the first hydraulic cylinder 140 by screw thread,Convex mould base baffle plate 320 is welded on a side of convex mould base 310, and multi-disc punch sheet 330 is sequentially arranged in punchOn seat 310, also with punch connecting bolt 340, multi-disc punch sheet 330 is fixed on punch baffle plate 320.

As shown in Figure 4, Figure 5, described die sheet 230 thickness are 25mm, are processed with in its frontThe die groove 231 that 3mm is thick, the back side is processed with the die projection 232 that 2mm is thick, described die groove231 and die projection 232 match, realize the accurate location between adjacent two die sheets 230. RecessedThe die groove 231 that matrix 230 is processed is darker than die projection 232, is used at two die sheets 230Intermediate arrangement heat shield, making does not have heat transmission between adjacent two die sheets 230.

As shown in Figure 6, Figure 7, on the bottom surface of die sheet 230, be provided with two mounting grooves 233, at dieSeat 210 upper surfaces are provided with two parallel die mounting guide rails 211, described mounting groove 233 and dieMounting guide rail 211 matches, and makes die sheet 230 accurately locate and be installed on die socket 210.

The left and right sides of die sheet 230 is provided with two installing holes 234, same on die socket baffle plate 220Sample is provided with two installing holes 221, the installing hole 234 by die connecting bolt 240 from die sheet 230And installing hole 221 on die socket baffle plate 220 passes, and multiple die sheets 230 are fastened on to dieOn seat baffle plate 220, form combined die.

The top of die sheet 230 is provided with pit 235 near upper surface place, and the degree of depth is 15mm, is used for clothPut temperature sensor. The preferred model of temperature sensor is the thermocouple of WRNG-430 or WRN2G-430,Be used for measuring the real time temperature of high temperature plate lower surface. Die sheet 230 is interior according to part shape laminating dieSurface is furnished with the die cooling duct 236 connecting from left to right, described die tube-cooled passage 236Diameter be 15mm, centre distance die sheet 230 upper surfaces are 10mm.

As shown in Figure 8, Figure 9, punch sheet 330 is similar with the structure of die sheet 230, punch sheet thicknessFor 25mm, front is processed with the punch groove 331 that 3mm is thick, and it is prominent that the back side is processed with the punch that 2mm is thickPlay 332, described punch groove 331 and punch projection 332 match, and have realized two punch sheets 330Between accurate location. The punch groove 331 that punch sheet 330 is processed is darker than punch projection 332, usesCome at two punch sheets, 330 intermediate arrangement heat shields, making does not have heat between adjacent two punch sheets 330Transmit.

As shown in Figure 10, Figure 11, the top of punch sheet 330 is provided with two mounting grooves 333, at punchOn seat 310, have punch mounting guide rail 311, described mounting groove 333 matches with punch mounting guide rail 311,Make punch sheet 330 accurately locate and be installed on convex mould base 310.

The middle part of punch sheet 330 arranges an installing hole 334, on convex mould base baffle plate 320, arranges equallyHave an installing hole 321, the installing hole 334 by punch connecting bolt 340 from punch sheet 330 andInstalling hole 321 on convex mould base baffle plate 320 passes, and multiple punch sheets 330 are fastened on to convex mould base gearOn plate 320, form combined type punch.

The bottom of punch sheet 330 is provided with pit 335 near lower surface place, and the degree of depth is 15mm, is used for clothPut temperature sensor, measure the real time temperature of high temperature plate upper surface. Punch sheet 330 is interior according to partAdhered shape convex mould surface is furnished with the punch cooling duct 336 connecting from left to right, described punch pipelineThe diameter of cooling duct 336 is 15mm, and centre distance punch sheet 330 lower surfaces are 10mm.

After installing into combined type punch set, combined die can carry out the punching press processing of steel plate. To be withThe steel plate 500 of punching press is placed in the recessed top of combined type, first the second hydraulic cylinder 150 is carried out oil-filledly, makesBlank holder 400, under the drive of the second hydraulic cylinder 150, moves downward, the edge of steel plate 500 pushed down,Then the first hydraulic cylinder 140 is carried out oil-filledly, make the first hydraulic cylinder 140 drive the box-like punch of module downwardMotion, make the recessed and box-like punch of module of combined type carry out matched moulds, thereby steel plate 500 is stamped out to mouldShape, as shown in Figure 12-14.

As shown in figure 15, set forth the course of work of the present utility model as an example of 22MnB5 example. By 1.5mmThick plate is heated to 900 DEG C in heating furnace, is incubated and within 3~5 minutes, makes it abundant austenitizing, thenTransfer to rapidly on this thermal forming device, carry out stamping. Shape in the time that plate cooldown rate is greater than 25 DEG C/sOne-tenth tensile strength is 1500~1600MPa, the martensitic structure that elongation after fracture is 5~6%; Cooling speedRate forms tensile strength while being 3 DEG C/s left and right per second be 600~700MPa, and elongation after fracture is15~20% ferrite and pearlite tissue; Middle all the other cooldown rates form bainite and martensite successivelyTissue, ferrite-bainite and martensite line and staff control, ferritic-pearlitic and Martensite-Bainite Mixed Microstructure,Its tensile strength reduces successively, and elongation after fracture raises successively. Cooling duct is passed to the cold of different temperaturesBut gas, make mould each several part keep different temperatures, thereby it is cold to realize the different parts difference of endergonic structureBut speed, finally realizes automobile energy-absorbing structure optimal strength and distributes.

Specific works process comprises the following steps:

Step 1, automobile energy-absorbing structure hot forming decompressor has been assembled, wherein combined die and15 die sheets and 15 punch sheets are installed respectively on combined type punch. Utilize 1 of cutting machine well cuttingThe 22MnB5 blank plate of 375mm × 300mm × 1.5mm, and utilize instrument to be transferred to heatingIn stove, be warming up to 900 DEG C, and be incubated 5min and guarantee that blank plate interior tissue is converted into completely uniformlyAustenite.

Step 2, by mechanical device, the high-strength steel plate of the high temperature of complete austenitizing is transferred to rapidlyOn this decompressor, the first hydraulic cylinder and the second hydraulic cylinder are moved downward, carry out drop stamping operation, punchingPressure speed is 75~80mm/s.

When step 3, punching press, in punch cooling duct and die cooling duct, pass to different temperaturesCool nitrogen, carries out selectively cooling to plate. Die sheet and punch sheet are all numbered to 1~15. Give 1~4Number matrix passes to low temperature nitrogen, and Real-Time Monitoring plate temperature makes it cooldown rate and is greater than 25 DEG C/s, forms anti-Tensile strength is 1500~1600MPa, the martensitic structure that elongation after fracture is 5~6%; Give 5, No. 6 mouldsSheet passes to slightly the cool nitrogen of low temperature, and to make plate cooldown rate be 17 DEG C/s left and right, forms bainite and horseFamily name soma, tensile strength is between 1500 and 1000; Pass to moderate temperature to 7~No. 9 matrixs coldBut nitrogen, Real-Time Monitoring plate temperature makes it 10 DEG C/s of cooldown rate left and right, forms tensile strength and is1000MPa, (bainite accounts for for the ferrite-bainite that elongation after fracture is 10% and martensite line and staff control75%); Pass to higher temperature cool nitrogen to 10, No. 11 matrixs, making plate cooldown rate is a 5 DEG C/s left sideThe right side, forms ferritic-pearlitic and Martensite-Bainite Mixed Microstructure, and tensile strength is between 1000 and 600;Pass to high temperature nitrogen to 12~No. 15 matrixs, making plate cooldown rate is 3 DEG C/s, forms tensile strength and is600~700MPa, the ferrite and pearlite tissue that elongation after fracture is 15~20%. So far formedLength is 375mm, and middle tensile strength high-ductility is low, and both sides tensile strength inductile is high, and intensity andThe automobile energy-absorbing part of the even gradual change of plasticity.

In another embodiment, in the time needing the energy-absorbing part of punching press varying strength distribution, only need by adjustingThe Temperature Distribution of whole each matrix cool nitrogen changes the cooldown rate at the each position of part, thereby realizes a set ofMould is manufactured the energy-absorbing part that varying strength distributes.

In another embodiment, in the time needing the energy-absorbing part of punching press different length, only need by adjusting mouldThe sheet number of sheet, as increase by 20 of 5 arrival, stamp out the energy-absorbing part that length is 500mm.

Although embodiment of the present utility model is open as above, it is not restricted to description and realityExecute listed utilization in mode, it can be applied to the various fields of the present utility model that are applicable to completely, forThose skilled in the art, can easily realize other amendment, are not therefore deviating from claimAnd under the universal that limits of equivalency range, the utility model is not limited to specific details and shows hereGo out and the legend of describing.

Claims (8)

1. an automobile energy-absorbing structure hot forming decompressor, is characterized in that, comprises
Combined die, it comprises the die sheet that multi-disc is closely fixedly connected with side by side;
Combined heave die, it is arranged at the top of described combined die, and described combined heave die comprises that multi-disc is arranged side by sideThe punch sheet being closely fixedly connected with;
Blank holder, it is arranged at described combined die top, for compressing steel plate to be punched;
Driving mechanism, it is connected with described combined heave die and blank holder respectively, drive described combined heave die andBlank holder moves down and carries out punching operation;
Wherein, in described die sheet and/or punch sheet, be provided with cooling duct, described die sheet and/or described inPunch sheet forms multiple different cooled regions, and each region has different cooldown rates.
2. automobile energy-absorbing structure hot forming decompressor according to claim 1, is characterized in that,Described driving mechanism comprises the first hydraulic cylinder and the second hydraulic cylinder, and described the first hydraulic cylinder and combined heave die connectConnect, described the second hydraulic cylinder is connected with blank holder.
3. automobile energy-absorbing structure hot forming decompressor according to claim 1 and 2, its feature existsIn, a side of described die sheet is provided with die groove, and opposite side is provided with die projection, described dieGroove matches with die projection, and adjacent two die sheets are accurately located side by side;
One side of described punch sheet is provided with punch groove, and opposite side is provided with punch projection, described punchGroove matches with punch projection, and adjacent two punch sheets are accurately located side by side.
4. automobile energy-absorbing structure hot forming decompressor according to claim 3, is characterized in that,Between an adjacent company die sheet, be provided with heat shield; Between an adjacent company punch sheet, be provided with heat shield.
5. automobile energy-absorbing structure hot forming decompressor according to claim 4, is characterized in that,The degree of depth of described die groove is greater than the height of described die projection, and described heat shield is arranged on described dieIn groove; The degree of depth of described punch groove is greater than the height of described punch projection, and described heat shield is arranged onIn described punch groove.
6. automobile energy-absorbing structure hot forming decompressor according to claim 5, is characterized in that,Described die upper surface below and punch lower surface top are provided with temperature sensor.
7. according to the automobile energy-absorbing structure hot forming described in any one in claim 1,2,4,5 and 6Decompressor, is characterized in that, described combined die also comprises die socket, on described die socket, is provided withDie mounting guide rail, described die sheet below is provided with die mounting groove, described die mounting groove with described inDie mounting guide rail coordinates; Described combined heave die also comprises convex mould base, on described convex mould base, is provided with punchMounting guide rail, described punch sheet top is provided with punch mounting groove, described punch mounting groove and described punchMounting guide rail coordinates.
8. automobile energy-absorbing structure hot forming decompressor according to claim 7, is characterized in that,Described combined die also comprises die socket baffle plate, and it is fixed on a side of described die socket, described die sheetFix by bolt and described die socket baffle plate; Described combined heave die also comprises convex mould base baffle plate, and it is fixedIn a side of described convex mould base, described punch sheet is fixed by bolt and described convex mould base baffle plate.
CN201521127817.1U 2015-12-30 2015-12-30 Car energy -absorbing structure hot formed stamping device CN205236805U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521127817.1U CN205236805U (en) 2015-12-30 2015-12-30 Car energy -absorbing structure hot formed stamping device

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Application Number Priority Date Filing Date Title
CN201521127817.1U CN205236805U (en) 2015-12-30 2015-12-30 Car energy -absorbing structure hot formed stamping device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105598282A (en) * 2015-12-30 2016-05-25 吉林大学 Hot forming punching device of automobile energy absorbing structure and punching method
CN106694671A (en) * 2017-03-06 2017-05-24 东莞市金拓机械有限公司 Multi-station rotating disc type force measuring type hydraulic machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105598282A (en) * 2015-12-30 2016-05-25 吉林大学 Hot forming punching device of automobile energy absorbing structure and punching method
CN106694671A (en) * 2017-03-06 2017-05-24 东莞市金拓机械有限公司 Multi-station rotating disc type force measuring type hydraulic machine

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160518

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CF01 Termination of patent right due to non-payment of annual fee