CN103785761B - Pressure process for cooling and the die servo device of hot forming steel pipe segmentation strengthening class part - Google Patents
Pressure process for cooling and the die servo device of hot forming steel pipe segmentation strengthening class part Download PDFInfo
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- CN103785761B CN103785761B CN201410042973.1A CN201410042973A CN103785761B CN 103785761 B CN103785761 B CN 103785761B CN 201410042973 A CN201410042973 A CN 201410042973A CN 103785761 B CN103785761 B CN 103785761B
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- 238000001816 cooling Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 21
- 230000011218 segmentation Effects 0.000 title claims abstract description 16
- 238000005728 strengthening Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000013461 design Methods 0.000 claims abstract description 8
- 229910000712 Boron steel Inorganic materials 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 16
- 238000010791 quenching Methods 0.000 claims description 15
- 238000003856 thermoforming Methods 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 230000004069 differentiation Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 229910000734 martensite Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Pressure process for cooling and the die servo device of the hot forming steel pipe segmentation strengthening class part in a kind of hot forming punching press field, by servoBcylinder device in mould, according to size and the time that need to control the suffered pressurize loading force of workpiece zones of different of design, and then control each subregional cooling velocity, thereby obtain the each subregional different physical characteristics of tubing. The present invention can need to realize needed material behavior in arbitrary region according to what design, does not need extra arrange mold heater, has significantly reduced production cost and complex procedures degree.
Description
Technical field
What the present invention relates to is a kind of method of high-strength steel stamping technical field, and specifically a kind of intensity reaches 1500MP left and rightPressure process for cooling and the die servo device of hot forming steel pipe segmentation strengthening class part.
Background technology
Automobile boron steel steel pipe is as the emerging superhigh intensity hot forming of one steel pipe, for segmentation reinforcement technique provides possible-samePart, can, according to the needs of Automobile Design, adopt different Technologies for Heating Processing in the zones of different of this part, thereby obtains differentIntensity and plasticity. The production technology of hot forming boron steel material Ruan district technology is divided into 4 stages:
1) heating: boron steel steel pipe is heated to the needed temperature of heat treatment;
2) transmission: boron steel steel pipe is sent in mould to be punched;
3) be shaped: be at high temperature shaped by mould punching;
4) quench cooled: in the different cooling velocity of zones of different control, can occur:
A) hard area cooling (> 25 DEG C fast/s). Transformation from from austenite microstructure to martensite microstructure, obtain intensity andExtreme hardness, the part that plasticity is lower. Its intensity can reach 1500-2000MPa, and plasticity is greater than 5%;
B) soft district at a slow speed cooling (< 25 DEG C/s). By controlling different cooling velocities, in the process transforming at austenite structure,Can Slow cooling, to the transformation of ferrite and pearlite microstructure, obtain the part that intensity and hardness are higher, plasticity is good;Also can be comparatively fast cooling, to the transformation of bainite microstructure, obtain the part that intensity and hardness are very high, plasticity is moderate.
Its corresponding CCT phasor as shown in Figure 1.
The boron steel material typical case that can obtain varying strength and plasticity is divided into:
| Sequence number | Material specification | Yield strength (Mpa) | Tensile strength (Mpa) | Percentage elongation (A50) | Hardness (HV2) |
| 1 | HS400 | 400±50 | 600±50 | 15％ | 170-220 |
| 2 | HS550 | 550±50 | 750±50 | 7％ | 220-255 |
| 3 | HS700 | 700±50 | 900±50 | 6％ | 270-300 |
| 4 | HS1150 | 1150±50 | 1500±50 | 5％ | 400-520 |
The chemical composition that the most common one of such boron steel can reach 1500MPa intensity (HS1150) is:
| C | Si | Mn | P | S | Cr | B | |
| min | 0.20 | 0.20 | 1.00 | - | - | 0.15 | 0.0015 |
| max | 0.25 | 0.35 | 1.30 | 0.025 | 0.015 | 0.25 | 0.0050 |
The processing technology in the soft district of the above thermoforming series of at present common acquisition is mold heated method, first by mould and die preheating extremelyThe technological temperature of 370-700 DEG C, then workpiece is heated, transmits, is shaped, is incubated, the time that is shaped and is incubated by control,And then reach the control to cooling velocity, obtain different Ruan district tissue. This process mould and relevant device more complicated, energy consumptionHigher, high expensive; In mould, be high-temperature heating state to part high-pressure forming, fillet serious wear, die life is short.
Through the retrieval of prior art is found, Chinese patent literature CN102162574, open day 2011-08-24, openA kind of super-high strength steel laser tailor welded and forming technology thereof, by super-high strength steel and high-strength steel according to required form laser assembly solder, thenThe welding plate of gained is sent in the stove of protective gas and be heated to 920-940 DEG C, at least continue 5 minutes, fully austenitizing, thenWelding plate after austenitizing is transferred to the quick matched moulds of forcing press, shaping, and then pressurize quench cooled is to 100-150 DEG C, with room temperatureCoolingly make required part. But this technology is to control part machinery performance by difference being expected to thick material welds together to realize, and increasesAdded laser weld operation, technology chain is longer, and cost is also higher.
Chinese patent literature CN201180036260, open day 2013-03-27, discloses a kind of for steel plate is madeThe shaping jig of workpiece thermoforming and local pressure quench and method, this invention relates to a kind of for the workpiece of being made up of steel plate is carried outThe shaping jig of thermoforming and local pressure quench and method, wherein workpiece before moulding, heat and then have die andThermoforming in the shaping jig of punch, shaping jig also has cooling device. Its method is characterised in that, closing of shaping jigUnder state, contacting partly by movable die part and activity between workpiece and the die of shaping jig and the contact-making surface of punchSeparately mobile and disconnect from closed position to open position of punch part. Die is by a first die part and at least one phaseThe second die part that can move for the first die part forms, and punch is relative with at least one by a first punch partThe second punch part that can move in the first punch part forms, wherein at least one second die part that can move and at leastSecond punch part that can move with open equipment acting in conjunction, this open equipment cause at least one second die part andThe shut-in time that at least one second punch part contacts with workpiece is shorter than the first die part and the first punch part. But this technologyDefect is:
Say from object, the method be conventional way to existing soft district technology-by mold heated to 370-700 DEG C-improvement,Object is the wearing and tearing that reduce after mold heated aborning, or reduces firing equipment, but still need to heat mould, belongs toIn the temperature control technology of cooling medium.
Say from mould structure, the punch of this technical requirement activity and die inside arrange heater, thereby complex structure.
Summary of the invention
The present invention is directed to prior art above shortcomings, the pressure that proposes a kind of hot forming steel pipe segmentation strengthening class part is coolingTechnique and die servo device, by the pressure control of servoBcylinder device in mould, the suffered cooling dwell pressure of dynamic adjustments workpieceSize and time, and then control the cooling velocity in each region, thus be met each region different materials machinery that product design needsThe workpiece of performance.
The present invention is achieved by the following technical solutions:
The pressure process for cooling that the present invention relates to a kind of hot forming steel pipe segmentation strengthening class part, its step comprises:
Step 1, press, mould are prepared: operating pressure, working time are set in patrix and/or counterdie, operating rate is adjustableServoBcylinder;
Described servoBcylinder and servo-control system thereof are according to the difference of workpiece size, shape, thickness etc., in shaping, pressurizeIn journey, in servoBcylinder minimax pressure limit, every group of servoBcylinder passes through separately independently its input time-guarantor of servo system controlPressure parameter curve, arbitrarily with the pressure and/or the speed that regulate dynamically in real time servoBcylinder.
Step 2, preheating: boron steel tubing is heated to more than 850 DEG C, makes the even austenitizing of steel pipe;
Be preferably described preheating time: 4-1200s, and with mode of heating and tubing coating Change of types and difference.
Step 3, transmission: the boron steel heating is sent in thermoforming press by heater, realize the transmission of workpiece andProcess Character cooling processing;
Described Process Character cooling processing, refers to transfer to the process of thermoforming press from heater, no matter employing natural room temperature,The means such as constant temperature or attemperator, are placed in certain temperature controlled environment by workpiece, workpiece arrive temperature when thermoforming press all lower thanTemperature in heater is cooling procedure. Its cooling velocity is preferably 5-25 DEG C/s;
The time of described transmission is controlled, and by the distance design between heater and press, and the speed of transmitting device is adjustedJoint is realized. Transmission time between heater and press is 0.1-20s, and its total transmission range is preferably 0.5-8m. Transmitting deviceFor conveyer belt and/or manipulator, speed regulates and is preferably 0-5m/s.
Step 4, is shaped: hot-forming die is driven by forcing press under 450-850 DEG C of environment, is moved downward to complete by top dead-centreComplete closure is appointed product shape by component shaping.
Step 5, cooling pressurize: hot-forming die keeps the lower dead point position that mould is completely closed constant under the driving of press,The packing pressure that press provides also remains unchanged, and the hydraulic servo cylinder dynamic adjustments of each areal pressure by correspondence position in mould strengthened in segmentation,Realize the quench cooling rate differentiation control to zones of different.
Described quench cooling rate differentiation control refers to: the mechanical property of materials that need to be reached by each region of workpiece determines,Change and realize by mould inside hydraulic servo cylinder pressure, generally at 5-100 DEG C/s;
Described differentiation refers to: the difference of the mechanical property of materials that mould need to obtain according to the each region of workpiece, is divided into someRegion, i.e. segmentation strengthening, mould corresponding to each serial Ruan district and/or hard area, respectively do for oneself can self-movement region.
Described mould structure is that the pressure of the cooling packing stage in hard area is watched by press slide and/or press at the difference in each regionTaking push rod provides, but does not change, and mould does not have the action of relative motion yet; Each soft district die insert is driven by servoBcylinder,Can self contained function, pressure size is by servoBcylinder control in mould, real-time change.
The material of described mould, the material that hard area mold materials is quick conductive is as high-quality mould steel, as H13, SKD61,8407 etc., soft district mold materials is selected with the identical quick conductive in hard area according to the difference of the required quenching velocity of work-piece coolsMaterial is as high-quality mould steel, or the low material of use pyroconductivity, as pottery, surperficial heat insulating coating etc.;
The die servo device that the present invention relates to realize above-mentioned technique, comprising: work under upper die and lower die, press top shoe, pressMake platform, be placed in servoBcylinder and control system and die mandrel in patrix and/or counterdie.
Described servoBcylinder and control system thereof comprise: organize servoBcylinder and/or the interior servoBcylinder of counterdie mould in patrix mould, each watching moreThe stroke that takes cylinder is preferably 0-300mm, the preferred 1-30t of limiting pressure that each servoBcylinder is independent.
Described patrix and/or counterdie inside are provided with corresponding material pressing core.
Described die mandrel is specifically arranged at the inside workpiece between patrix material pressing core and counterdie material pressing core and realizes and supportingWorkpiece.
The inherent each region of described upper die and lower die is equipped with the not equipment for cooling die higher than room temperature, in upper die and lower die, does not addHot charging is put.
The preferred of described press pressure is 50-1500t, and the speed adjustable range of forcing press is 10-900mm/s.
In described upper die and lower die, patrix material pressing core and counterdie material pressing core at least one adopt high-quality mould steel as Dievar,SKD61, H13 etc. make.
Technique effect
Compared with the control of cooling velocity being realized by the temperature of mould with prior art, the present invention is by servoBcylinder system in mouldSystem, will control the heat conduction problem of work-piece cools speed, is converted into the problem of controlling the pressure between workpiece and mould, by controllingPressure, regulates the heat transfer efficiency of mould to workpiece, thereby controls cooling velocity. As Fig. 2 illustrated along with the gap of workpiece and mould,Contact difference, the change curve of heat transfer efficiency.
The present invention, as a kind of novel process of realizing high-strength hot shaping steel pipe segmentation reinforcement technique, produces for arbitrary boron steel steel pipeProduct, can be in its arbitrary region, between the tensile strength of 600-1500MPa and the even higher percentage elongation of 5-15%, freely determinesThe product requirement of justice its intensity and percentage elongation, thus the free degree of product design significantly expanded. Taking automobile as example, can basisThe needs of collision safety, when can improving product strength or percentage elongation, control the pattern that this region collision of car body was lost efficacy, therebyEffectively protection people's safety.
With respect to conventional softer high-strength steel segmentation strengthening processing technology, the present invention do not need additionally to arrange heater at mould inside,Thereby simple in structure, processing technology is unified; Beyond mould, do not need additional required power and the control system of mold heated yet, simplifyThe demand of firing equipment;
ServoBcylinder servo-drive system of the present invention, is mould inside parts, position and pressure size choose flexible freedom, suitable especiallyClosing the regional area that is applied in non-press push rod position carries out on the part of segmentation intensive treatment.
Brief description of the drawings
Fig. 1 is the cooling CCT phasor of boron steel in prior art.
Fig. 2 is boron steel heat transfer efficiency change curve.
Fig. 3 is original state schematic diagram of the present invention;
Fig. 4 is that schematic diagram is processed in thermoforming of the present invention;
Fig. 5 is that schematic diagram is processed in pressurize of the present invention;
In figure: servoBcylinder, the interior servoBcylinder of 4 counterdie moulds, 5 patrix material pressing cores, 6 counterdies in 1 patrix, 2 counterdies, 3 patrix mouldsMaterial pressing core, 7 press top shoes, 8 press lower tables, 9 die mandrels, f1～f7Be respectively this method implement device diverse locationPressure signal;
Fig. 6 is the interior hydraulic servo cylinder pressure-time curve of the mould of embodiment 1;
Fig. 7 is the interior hydraulic servo cylinder pressure-time curve of the mould of embodiment 2;
Fig. 8 is the typical HS400 material crystalline phase tissue that the present invention obtains;
Fig. 9 is the typical HS1150 material crystalline phase tissue that the present invention obtains;
Figure 10 is the typical HS700 material crystalline phase tissue that the present invention obtains.
Detailed description of the invention
Below embodiments of the invention are elaborated, the present embodiment is implemented under taking technical solution of the present invention as prerequisite,Provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 3-Figure 5, workpiece is 2.0mm thickness, and 150mm is wide, 1000mm length thermoforming boron steel workpiece sectionShaping, quenching schematic diagram. Workpiece product requirement is f6Corresponding product region is the soft district of HS400, and all the other are hard area HS1150. ThisThe concrete preparation process schematic diagram of method, wherein:
Fig. 3 is reset condition, visible according to Fig. 3, and this method implement device comprises: in patrix 1, counterdie 2, patrix mould, watchTake servoBcylinder 4 in cylinder 3, counterdie mould, patrix material pressing core 5, counterdie material pressing core 6, press top shoe 7, press lower table 8,Die mandrel 9.
Described patrix 1 covers product hard area HS1150 scope, and material is high-quality mould steel SKD61;
Described patrix material pressing core 5 covers product soft district HS400 scope, and material is high-quality mould steel SKD61;
Described counterdie material pressing core 6 covers the most of product that comprises part hard area HS1150 Ji Ruan district HS400, and material is excellentMatter mould steel SKD61;
Described counterdie 2 covers all hard area HS1150s of product except counterdie material pressing core 6, and material is high-quality mould steelSKD61；
2 of servoBcylinder 3 one rows in described patrix mould, spacing 600mm is arranged vertically above workpiece, is carried by an equipmentThe servo power source of confession drives, stroke 50mm, and each servoBcylinder pressure 5t, the dwell time is adjustable.
6 of servoBcylinder 4 one rows in described counterdie mould, spacing 200mm is arranged vertically below workpiece, is carried by an equipmentThe servo power source of confession drives, stroke 50mm, and each servoBcylinder pressure 25t, the dwell time is adjustable.
Fig. 3,4,5 is the present embodiment process schematic representation, and the present embodiment concrete steps comprise:
Step 1, press, mould are prepared: press pressure, speed is adjustable; Above and/or under Mo Monei servoBcylinder, operating pressureAll adjustable with the working time;
Step 2, preheating: boron steel tubing is heated to 930 DEG C, makes the even austenitizing of tubing;
Be preferably described preheating time: 4-1200s, and with mode of heating and tubing coating Change of types and difference.
Step 3, transmission: as shown in Figure 3, in the air of 25 DEG C of room temperatures, in 3s, workpiece is put into hot forming tool;
Described Process Character cooling processing, refers to transfer to the process of thermoforming press from heater, no matter employing natural room temperature,The means such as constant temperature or attemperator, are placed in certain temperature controlled environment by workpiece, workpiece arrive temperature when thermoforming press all lower thanTemperature in heater is cooling procedure. Its cooling velocity is preferably 5-25 DEG C/s;
The time of described transmission is controlled, and by the distance design between heater and press, and the speed of transmitting device is adjustedJoint is realized. Transmission time between heater and press is 0.1-20s, and its total transmission range is preferably 0.5-8m; Transmission dressBe set to conveyer belt and/or manipulator, speed regulates and is preferably 0-5m/s.
Step 4, is shaped: hot-forming die is driven by forcing press under 450-850 DEG C of environment, is moved downward to complete by top dead-centreComplete closure is appointed product shape by component shaping.
Step 5, cooling pressurize: as shown in Figure 2, hot-forming die keeps the lower dead of the complete closure of mould under the driving of pressPoint position h0The packing pressure P constant, press provides0Also remain unchanged, segmentation is strengthened each areal pressure by correspondence position in mouldHydraulic servo cylinder dynamic adjustments, realizes the quench cooling rate differentiation control to zones of different, specifically refers to: cold for sameBut medium (mould), the raising of dwell pressure when cooling, the corresponding raising of work-piece cools speed. For improving cooling velocity,To the mechanical property of materials of HS1150, must select the mold materials that heat conduction efficiency is high, as SKD61, strengthen cooling pressurize simultaneouslyPressure, makes cooling velocity be greater than 25 DEG C/s; In order to reduce cooling velocity, obtain the material machine of HS400, HS550, HS700Tool performance, must select the mold materials of suitable pyroconductivity, reduces cooling dwell pressure simultaneously, makes cooling velocity be less than 25 DEG C/s,And be controlled within the scope of a certain rational quenching velocity.
Fig. 4 is shaped: in 0.5s, complete forming process by 300T forcing press, wherein the fully loaded work of upper and lower Mo Monei servoBcylinderDo, press forming power is set to 200t;
Fig. 5 pressurize: in patrix mould, servoBcylinder 3 packing pressure are zero, and promote 0.7mm, servoBcylinder 4 packing pressure in counterdie mould150t, in patrix mould, in servoBcylinder 3, counterdie mould, servoBcylinder 4 pressurize curves are constant as Fig. 6, forcing press packing pressure 200t, mould is wholeAfter body pressurize 30s, part is taken out in the demoulding.
Compared with prior art, the product performance index parameter that the present embodiment prepares is: f6Corresponding region workpiece material performance is HS400,Crystalline phase is organized as ferrite+pearlite, as Fig. 8; All the other are hard area HS1150 material property, and crystalline phase is organized as martensite, as figure9。
Embodiment 2
As shown in Figure 3-Figure 5, workpiece is 2.0mm thickness, and 150mm is wide, 1000mm length thermoforming boron steel workpiece sectionShaping, quenching schematic diagram. Workpiece product requirement is f6Corresponding product region is the soft district of HS400, except f6Wei Ruan district beyond regionHS700, all the other regions of product are hard area HS1150.
This method implement device as shown in Figure 3, wherein:
Described patrix 1 covers the soft district HS700 of product, hard area HS1150 All Ranges, and material is high-quality mould steel SKD61;
Described patrix material pressing core 5 covers product soft district HS700 All Ranges, and material is high-quality mould steel SKD61;
Described counterdie material pressing core 6 covers the All Ranges of the soft district HS400 of product, soft district HS700, and material is high-quality mouldSteel SKD61;
Described counterdie 2 covers the All Ranges of product hard area HS1150, and material is high-quality mould steel SKD61;
2 of servoBcylinder 3 one rows in described patrix mould, spacing 600mm is arranged vertically above workpiece, is carried by an equipmentThe servo power source of confession drives, stroke 50mm, and each servoBcylinder pressure 5t, the dwell time is adjustable.
4 of servoBcylinder 4 one rows in described counterdie mould, spacing 200mm is arranged vertically below workpiece, is carried by an equipmentThe servo power source of confession drives, stroke 50mm, and each servoBcylinder pressure 5t, the dwell time is adjustable.
Fig. 3,4,5 the present embodiment process schematic representations, compared with embodiment 1, the present embodiment concrete steps comprise:
Fig. 4 is shaped: in 0.5s, complete forming process by 300T forcing press, wherein the fully loaded work of upper and lower Mo Monei servoBcylinderDo, plastic force is set to 200t;
Fig. 5 pressurize: as shown in Figure 7, wherein in patrix mould, servoBcylinder 3 packing pressure are zero to pressurize curve, and promote 0.7mm,Pressurize curve is that numerical value is zero horizontal line, and in counterdie mould, before servoBcylinder 4 packing pressure, 15s is 5-10t, and before pressurize curve, 15s is for shakingWidth is 5t, the sine curve that the cycle is 0.5s, and rear 15s is the packing pressure that 50t is constant.
Compared with prior art, the product performance index parameter that the present embodiment prepares is: f6Corresponding region workpiece material performanceFor HS400, crystalline phase is organized as ferrite+pearlite, as Fig. 8; Except f6Wei Ruan district HS700 beyond region, crystalline phase is organized as ironElement body+martensite, as Figure 10; All the other are hard area HS1150 material property, and crystalline phase is organized as martensite, as Fig. 9.
Claims (2)
1. a pressure process for cooling for hot forming steel pipe segmentation strengthening class part, is characterized in that, comprises the following steps:
Step 1, mould is prepared: operating pressure, working time, servoBcylinder that operating rate is adjustable are set in patrix and/or counterdieAnd control system;
Step 2, preheating: boron steel tubing is heated to more than 850 DEG C, makes the even austenitizing of tubing;
Step 3, transmission: the boron steel tubing heating is sent in thermoforming press by heater, realizes the transmission to workpieceWith Process Character cooling processing;
Step 4, is shaped: workpiece is placed in hot forming tool and is driven by press under 450-850 DEG C of environment, is transported downwards by top dead-centreMoving to complete closure, is appointed product shape by component shaping;
Step 5, pressurize is cooling: hot-forming die keeps the lower dead point position that mould is completely closed constant under the driving of press, pressesThe packing pressure that machine provides also remains unchanged, and the servoBcylinder dynamic adjustments of each areal pressure by correspondence position in mould strengthened in segmentation, realizesTo the quench cooling rate differentiation control of zones of different;
ServoBcylinder described in step 1 and control system thereof are according to the difference of workpiece size, shape, thickness, in shaping, pressurizeIn journey, in servoBcylinder minimax pressure limit, every group of servoBcylinder passes through separately independently its input time-guarantor of servo system controlPressure parameter curve, regulates pressure size and the duration of servoBcylinder, the quenching pressurize of real-time change zones of different real-time dynamiclyPower;
Process Character cooling processing described in step 3, refers to transfer to the process of thermoforming press from heater, and workpiece is placed inIn temperature controlled environment, temperature when workpiece arrives thermoforming press is all lower than the temperature in heater, and cooling velocity is 5-25 DEG C/s；
The time of the transmission described in step 3 is controlled, by the distance design between heater and press and the speed of transmitting deviceDegree regulates and realizes, and wherein: the transmission time between heater and press is 0.1-20s, its total transmission range is 0.5-8m;Transmitting device is conveyer belt and/or manipulator, and speed is adjusted to 0-5m/s;
Quench cooling rate differentiation control described in step 5 refers to: the mechanical property of materials that need to be reached by each region of workpieceDetermine, changed and realized by mould inside servoBcylinder pressure, this servoBcylinder and control system thereof need to obtain according to the each region of workpieceThe difference of the mechanical property of materials, is divided into some regions, i.e. segmentation strengthening, and mould corresponding to each serial Ruan district and/or hard area,Respectively the do for oneself region of self-movement;
Described quench cooling rate is 5-100 DEG C/s;
Described time-packing pressure parameter curve refers to: the curve that the loading of hydraulic pressure in servoBcylinder, unloading changed with the dwell time.
2. a die servo device of realizing technique claimed in claim 1, is characterized in that, comprising: upper die and lower die,Press top shoe, press lower table, be placed in servoBcylinder and control system and die mandrel in patrix and/or counterdie;
Described servoBcylinder and control system thereof comprise: organize servoBcylinder and/or the interior servoBcylinder of counterdie mould in patrix mould more;
The inherent each region of described upper die and lower die is equipped with the not equipment for cooling die higher than room temperature, not heating in upper die and lower dieDevice;
Described die mandrel is arranged at the inside workpiece between patrix material pressing core and counterdie material pressing core and realizes supporting workpiece;
The stroke of each servoBcylinder is 0-300mm, the limiting pressure 1-30t that each servoBcylinder is independent.
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| CN103209780A (en) * | 2010-12-27 | 2013-07-17 | Posco公司 | Method of manufacturing multi physical properties part |
| DE102012110649B3 (en) * | 2012-11-07 | 2013-11-14 | Benteler Automobiltechnik Gmbh | Thermoforming line and method for producing a hot-formed and press-hardened motor vehicle component |
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| JP3863874B2 (en) * | 2003-10-02 | 2006-12-27 | 新日本製鐵株式会社 | Hot press forming apparatus and hot press forming method for metal plate material |
| KR20100096832A (en) * | 2009-02-25 | 2010-09-02 | 현대제철 주식회사 | Cooling system for press mold and method for producing automobile parts using the same |
| US9315876B2 (en) * | 2010-09-30 | 2016-04-19 | Kobe Steel, Ltd. | Press-formed product and method for producing same |
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| JP4065069B2 (en) * | 1998-12-25 | 2008-03-19 | 北川精機株式会社 | Method and apparatus for thermoforming press working |
| JP4760578B2 (en) * | 2006-07-10 | 2011-08-31 | カシオ計算機株式会社 | Imaging apparatus, moving image shooting method, and moving image shooting control program |
| CN101104318A (en) * | 2006-07-12 | 2008-01-16 | 小松产机株式会社 | Press forming apparatus and method thereof |
| CN103209780A (en) * | 2010-12-27 | 2013-07-17 | Posco公司 | Method of manufacturing multi physical properties part |
| DE102012110649B3 (en) * | 2012-11-07 | 2013-11-14 | Benteler Automobiltechnik Gmbh | Thermoforming line and method for producing a hot-formed and press-hardened motor vehicle component |
| CN103042070A (en) * | 2012-12-31 | 2013-04-17 | 哈尔滨工业大学 | Method for controlling strength distribution during high-strength steel pipe hot forming |
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