CN203876278U - Pressing machine hydraulic push rod apparatus for segmental reinforcement part for hot formed steel plate - Google Patents
Pressing machine hydraulic push rod apparatus for segmental reinforcement part for hot formed steel plate Download PDFInfo
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- CN203876278U CN203876278U CN201420055976.4U CN201420055976U CN203876278U CN 203876278 U CN203876278 U CN 203876278U CN 201420055976 U CN201420055976 U CN 201420055976U CN 203876278 U CN203876278 U CN 203876278U
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Abstract
A pressing machine hydraulic push rod apparatus for a segmental reinforcement part for a hot formed steel plate belongs to the technical field of punching. With on and off operations of independent pressing machine hydraulic push rod apparatuses, average loading pressure applied to a work piece can be adjusted and cooling speed of each areas of the work piece can be controlled, so different material mechanical performance of each area of the work piece can be guaranteed. Material characteristics of any area can be achieved as needed; and extra die heating device is unnecessary, so production cost and procedure complexity can be reduced.
Description
Technical field
The utility model relates to a kind of device of high-strength steel stamping technical field, specifically a kind of intensity reaches the press hydraulic mandril device of the hot forming steel plate sectional strengthening class part of 1500MP left and right.
Background technology
Automobile boron steel steel plate is as a kind of emerging superhigh intensity hot forming steel plate, for segmentation reinforcement technique provides possibility-same part, can be according to the needs of Automobile Design, in the zones of different of this part, adopt different Technologies for Heating Processing, thereby obtain varying strength and plasticity.The production technology of hot forming boron steel material Ruan district technology is divided into 4 stages:
1) heating: boron steel steel plate is heated to the needed temperature of heat treatment;
2) transmission: boron steel steel plate is sent in mould to be punched;
3) be shaped: at high temperature by mould punching, be shaped;
4) quench cooled: control different cooling velocities in zones of different, can occur:
A) hard area cooling (25 ℃/s of >) fast.Transformation from from austenite microstructure to martensite microstructure, obtains intensity and extreme hardness, part that plasticity is lower.Its intensity can reach 1500 ?2000MPa, plasticity is greater than 5%;
B) soft district cooling (25 ℃/s of <) at a slow speed.By controlling different cooling velocities, in the process that austenite structure transforms, 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 of the most common a kind of 1500MPa of the reaching intensity of such boron steel (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 to 370 ?the technological temperature of 700 ℃, again 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 consumption are higher, 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; a kind of super-high strength steel laser tailor welded and forming technology thereof are disclosed; by super-high strength steel and high-strength steel according to required form laser assembly solder; then the welding plate of gained is sent in the stove of protective gas, be heated to 920 ?940 ℃; at least continue 5 minutes; abundant austenitizing; again the welding plate after austenitizing is transferred to the quick matched moulds of forcing press, shaping; then pressurize quench cooled to 100 ?150 ℃, with room temperature is cooling, make required part.But this technology is to control part machinery performance by difference being expected to thick material welds together to realize, and has increased laser weld operation, and technology chain is longer, and cost is also higher.
Chinese patent literature CN201180036260, open day 2013 ?03 ?27, disclose a kind of for workpiece thermoforming that steel plate is made and shaping jig and the method for local pressure quench, this invention relates to a kind of for the workpiece of being made by steel plate being carried out to shaping jig and the method for thermoforming and local pressure quench, wherein workpiece heats and then thermoforming in the shaping jig with die and punch before moulding, and shaping jig also has cooling device.Its method is characterised in that, under the closed condition of shaping jig, the separating movement from closed position to open position by movable die part and movable punch part that contacts partly between workpiece and the die of shaping jig and the contact-making surface of punch disconnects.Die partly consists of a first die part and the second die that at least one can move with respect to the first die part, and punch partly consists of a first punch part and the second punch that at least one can move with respect to the first punch part, wherein at least one second die part that can move and second punch part that at least one can move with open equipment acting in conjunction, this is opened equipment and causes at least one second die part shorter than the first die part and the first punch part with the shut-in time that at least one second punch part contacts with workpiece.But the defect of this technology is:
From object, say, the method be to the conventional way of existing soft district technology-by mold heated to 370 ?700 ℃-improvement, object is the wearing and tearing that reduce after mold heated aborning, or reduces firing equipment, but still need to heat mould, belong to the temperature control technology of cooling medium.
From mould structure, say, the punch of this specification requirement activity and die inside arrange heater, thereby complex structure.
Utility model content
The utility model is for prior art above shortcomings, a kind of press hydraulic mandril device of hot forming steel plate sectional strengthening class part is proposed, by the hydraulic control system of forcing press pin-lift arrangement, the open and close time of the suffered cooling dwell pressure of dynamic adjustments workpiece, and then control the cooling velocity in each region, thereby be met the workpiece of each region different materials mechanical performance that product design needs.
The utility model is achieved through the following technical solutions, and the utility model comprises: upper and lower mould, press top shoe, press lower table and be placed in press top shoe and/or press lower table in hydraulic mandril and hydraulic control system thereof.
Described hydraulic mandril and hydraulic control system thereof comprise: organize press top shoe hydraulic mandril and/or press lower table hydraulic mandril more.
The arrangement interval distance of described hydraulic mandril be preferably 50mm ?300mm, stroke be 0 ?300mm, the single pressure of push rod be 0 ?30t.
Described patrix and/or counterdie inside are provided with corresponding material pressing core.
Described press pressure scope be preferably 50 ?1500t, the speed adjustable range of forcing press be 10 ?900mm/s.
In described upper die and lower die, patrix material pressing core and counterdie material pressing core, at least one adopts high-quality mould steel to make as Dievar, SKD61, H13 etc.
The utility model can be used for pressure process for cooling, and its step comprises:
Step 1, press, mould are prepared: on press top shoe and/or press lower table, arrange the hydraulic mandril working alone;
Described hydraulic mandril is solidificated on press equipment, according to the difference of workpiece size, shape, thickness etc., in hydraulic mandril minimax pressure limit, set in advance a steady state value, and in cooling pressure maintaining period, can be in real time according to the program setting in advance, the open and close state of dynamic adjustments push rod pressure, thus regulate packing stage push rod packing pressure with/without curve.
Described packing stage push rod packing pressure with/without curve, instant m-packing pressure parameter curve, specifically refer to: at press, arrive bottom dead centre and start, till press starts to move upward, the time dependent curve of pressure that in the time of this section of press closes pressurize, the hydraulic mandril system of press lower table and/or upper table provides.
Step 2, preheating: boron steel sheet material is heated to more than 850 ℃, makes the even austenitizing of sheet material;
Be preferably described preheating time: 4 ?1200s, with mode of heating and sheet material coating Change of types and difference.
Step 3, transmission: the boron steel heating is sent in thermoforming press by heater, realizes the transmission of workpiece and Process Character cooling processing;
Described Process Character cooling processing refers to: from heater, transfer to the process of thermoforming press, no matter adopt the means such as natural room temperature, constant temperature or attemperator, workpiece is placed in to certain temperature controlled environment, temperature when workpiece arrives thermoforming press, all lower than the temperature in heater, is cooling procedure.Its cooling velocity be preferably 5 ?25 ℃/s.
The time of described transmission is controlled, and design, and the speed of transmitting device regulates to realize by the distance between heater and press.Transmission time between heater and press be 0.1 ?20s, its total transmission range be preferably 0.5 ?8m.Transmitting device is conveyer belt and/or manipulator, speed regulate be preferably 0 ?5m/s.
Step 4, is shaped: workpiece is placed in hot forming tool and is driven by forcing press at 850 ℃ of temperature of 450 ?, with certain speed and pressure, by top dead-centre, moved downward to complete closure, and by component shaping, be appointed product shape.
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, segmentation is strengthened each areal pressure by press push rod hydraulic system dynamic adjustments, realizes the quench cooling rate differentiation of zones of different is controlled.
Described quench cooling rate differentiation is controlled and is referred to: the mechanical property of materials that need to be reached by each region of workpiece determines, the hydraulic mandril pressure by workbench inside changes to be realized, generally 5 ?100 ℃/s;
Described differentiation refers to: the difference of the mechanical property of materials that mould need to obtain according to each region of workpiece, is divided into some regions, i.e. segmentation strengthening, the press hydraulic mandril that each serial Ruan district and/or hard area are corresponding, the region of the self-movement of respectively doing for oneself.
The difference of described mould structure in each region is that the pressure of the cooling packing stage in hard area is provided by press slide and/or the servo push rod of press, but do not change, and mould does not have the action of relative motion yet; Each soft district die insert is by press top rod driving, can self contained function and the having or not of controlled pressure.
The material of described mould, hard area mold materials is that the material of quick conductive is as high-quality mould steel, as H13, SKD61,8407 etc., soft district mold materials is selected with the material of the identical quick conductive in hard area as high-quality mould steel according to the difference of the required quenching velocity of work-piece cools, or use the low material of pyroconductivity, as pottery, surperficial heat insulating coating etc.
Technique effect
With in prior art, to the control of cooling velocity, the temperature by mould realizes and comparing, the utility model is by forcing press hydraulic mandril system, the heat conduction problem of work-piece cools speed will be controlled, be converted into the problem of controlling the pressure between workpiece and press hydraulic mandril, pass through controlled pressure, regulate the heat transfer efficiency of mould to workpiece, thereby control cooling velocity.As Fig. 2 has illustrated along with gap, the contact of workpiece and mould are different, the change curve of heat transfer efficiency.
The utility model is as a kind of novel process of realizing high-strength hot shaping steel plate sectional reinforcement technique, for arbitrary boron steel steel sheet product, can be in its arbitrary region, 600 ?1500MPa tensile strength and 5 ?between 15% even higher percentage elongation, freely define the product requirement of its intensity and percentage elongation, thereby significantly expanded the free degree of product design.Take automobile as example, can when can improve product strength or percentage elongation, control the pattern that this region collision of car body was lost efficacy according to the needs of collision safety, thereby effectively protect people's safety.
With respect to conventional softer high-strength steel segmentation strengthening processing technology, the utility model do not need additionally at mould inside, to arrange heater, thereby simple in structure, and processing technology is unified; Beyond mould, do not need additional required power and the control system of mold heated yet, simplified the demand of firing equipment;
Hydraulic mandril system of the present utility model, belongs to the one-time investment being solidificated on press apparatus.Once coming into operation, on mould, need only be equipped with the push rod of correspondence position, need to hydraulic mandril system be additionally installed at mould inside, thereby save the cost of mould;
The utility model ejector rod system, realizes by hydraulic system, is the common configuration of forcing press, thereby investment is less, applied widely.Although ejecting force, once immutable size is set, can be controlled cooling velocity by the time of loading-unloading is set.For the more single part of soft district's distribution, as shown in Figure 8, the B post in auto parts and components, is particularly suitable for using this technology and device to example especially.
Accompanying drawing explanation
Fig. 1 is the cooling CCT phasor of boron steel in prior art.
Fig. 2 is boron steel heat transfer efficiency change curve in prior art.
Fig. 3 is the utility model original state schematic diagram;
Fig. 4 is that schematic diagram is processed in the utility model thermoforming;
Fig. 5 is that schematic diagram is processed in the utility model pressurize;
In Fig. 3,4,5: 1 patrix, 2 counterdies, 3 press top shoe hydraulic mandrils, 4 press lower table hydraulic mandrils, 5 patrix material pressing cores, 6 counterdie material pressing cores, 7 press top shoes, 8 press lower tables.
Fig. 6 is the forcing press hydraulic mandril pressure-time curve of embodiment 1;
Fig. 7 is the forcing press hydraulic mandril pressure-time curve of embodiment 2;
Fig. 8 is the product schematic diagram of the product motor vehicle assembly B post of the utility model particularly suitable.
The specific embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented take technical solutions of the utility model under prerequisite; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
As figure 3 ?as shown in Fig. 5, workpiece is 1.8mm thickness, 150mm is wide, 1000mm length thermoforming boron steel workpiece section shaping, quenching schematic diagram.Workpiece product requirement is f
6corresponding product region is the soft district of HS400, and all the other are hard area HS1150.The concrete preparation process schematic diagram of this method, wherein:
Fig. 1 is reset condition, visible according to Fig. 1, and this method implement device comprises: patrix 1, counterdie 2, press top shoe hydraulic mandril 3, press lower table hydraulic mandril 4, patrix material pressing core 5, counterdie material pressing core 6, press top shoe 7, press lower table 8.
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 high-quality 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 steel SKD61;
Described press top shoe hydraulic mandril 3, press lower table hydraulic mandril 4 are shaft-like steel, respectively one arrange up and down, 5 push rods of every row, every row is unified by a Driven by Hydraulic Cylinder, stroke 0 ?300mm adjustable, pressure 0 ?150t adjustable (pressure limit of single push rod therefore 0 ?30t), pressure-time curve 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: operating pressure, working time, hydraulic mandril that operating rate is adjustable are set in upper table and/or lower table;
Step 2, preheating: boron steel sheet material is heated to 930 ℃, makes the even austenitizing of sheet material;
Step 3, transmission: as shown in Figure 3, in the air of 25 ℃ of room temperatures, in 3s, workpiece is put into hot forming tool;
Step 4, is shaped: as shown in Figure 4, in 0.5s, by 300T forcing press, complete forming process, wherein on forcing press, hydraulic mandril 3 arranges 1t pressure, and forcing press press lower table hydraulic mandril 4 arranges 30t pressure, and press forming power is set to 200t;
Fig. 5 pressurize: on forcing press, hydraulic mandril 3 packing pressure are zero, and promote 0.7mm, press lower table hydraulic mandril 4 packing pressure 150t, 3,4 pressurize curves are constant as Fig. 6, forcing press packing pressure 200t, after mold integral pressurize 30s, part is taken out in the demoulding.
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, the have no way of hydraulic pressure hydraulic mandril dynamic adjustments of correspondence position in press of having of each areal pressure is strengthened in segmentation, realizes the quench cooling rate differentiation of zones of different is controlled; As shown in Figure 5: on forcing press, hydraulic mandril 3 packing pressure are zero, and promote 0.7mm, forcing press press lower table hydraulic mandril 4 packing pressure 150t, 3,4 pressurize curves are constant as Fig. 6, forcing press packing pressure 200t, after mold integral pressurize 30s, part is taken out in the demoulding.
Compared with prior art, the product performance index parameter that the present embodiment prepares is: f
6corresponding region workpiece material performance is HS400, and crystalline phase is organized as ferrite+pearlite; All the other are hard area HS1150 material property, and crystalline phase is organized as martensite.
Embodiment 2
As figure 3 ?as shown in Fig. 5, workpiece is 1.8mm thickness, 150mm is wide, 1000mm length thermoforming boron steel workpiece section shaping, quenching schematic diagram.Workpiece product requirement is f
6corresponding product region is the soft district of HS400, f
8except f
6wei Ruan district HS700 beyond region, all the other regions of product are hard area HS1150.
This method implement device as shown in Figure 1, 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 3 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 mould steel SKD61;
Described counterdie 2 covers the All Ranges of product hard area HS1150, and material is high-quality mould steel SKD61;
On described forcing press, press lower table hydraulic mandril 3,4 is shaft-like steel, respectively one arrange up and down, 5 push rods of every row, every row is unified by a Driven by Hydraulic Cylinder, stroke 0 ?300mm adjustable, pressure 0 ?150t adjustable (pressure limit of single push rod therefore 0 ?30t), the dwell time is adjustable.
Fig. 3,4,5 the present embodiment process schematic representations, compare with embodiment 1, and the present embodiment concrete steps comprise:
Fig. 4 is shaped: in 0.5s, by 300T forcing press, complete forming process, wherein on forcing press, hydraulic mandril 3 arranges 1t pressure, forcing press press lower table hydraulic mandril 4 arrange 5 ?10t pressure, plastic force is set to 200t;
Fig. 5 pressurize: as shown in Figure 7, wherein on forcing press, hydraulic mandril 3 packing pressure are zero to pressurize curve, and promote 0.7mm, pressurize curve is that numerical value is zero horizontal line; Before forcing press press lower table hydraulic mandril 4 packing pressure, 2.5s packing pressure 200t is constant, and 2.5 ?7.5s unloadings are without pressure, and 7.5 ?10s reload to packing pressure 200t, 10 ?15s unloadings are without pressure, 15 ?30s reload to packing pressure 200t, press is opened, the part demoulding is taken out.
Compared with prior art, the product performance index parameter that the present embodiment prepares is: f
6corresponding region workpiece material performance is HS400, and crystalline phase is organized as ferrite+pearlite, as Fig. 8; f
8except f
6wei Ruan district HS700 beyond region, crystalline phase is organized as ferrite+martensite; All the other are hard area HS1150 material property, and crystalline phase is organized as martensite.
Claims (7)
1. a press hydraulic mandril device for hot forming steel plate sectional strengthening class part, is characterized in that, comprising: upper and lower mould, press top shoe, press lower table and be placed in patrix and/or counterdie in hydraulic mandril and hydraulic control system thereof;
Described hydraulic mandril and hydraulic control system thereof comprise: organize press top shoe hydraulic mandril and/or press lower table hydraulic mandril more.
2. device according to claim 1, it is characterized in that, described hydraulic mandril is solidificated on press equipment, difference according to workpiece size, shape, thickness etc., in hydraulic mandril minimax pressure limit, sets in advance a steady state value, and in cooling pressure maintaining period, can be in real time according to the program setting in advance, the open and close state of dynamic adjustments push rod pressure, thus regulate packing stage push rod packing pressure with/without curve.
3. device according to claim 1, is characterized in that, described press top shoe hydraulic mandril and press lower table hydraulic mandril are shaft-like steel, respectively one arrange up and down, and 5 push rods of every row, every row is unified by a Driven by Hydraulic Cylinder.
4. according to the device described in claim 1 or 3, it is characterized in that, the arrangement interval distance of described hydraulic mandril is 50mm-300mm, and stroke is 0-300mm, and the single pressure of push rod is 0-30t.
5. device according to claim 1, is characterized in that, described patrix and/or counterdie inside are provided with corresponding material pressing core.
6. device according to claim 1, is characterized in that, the pressure limit of described press is 50-1500t, and the speed adjustable range of forcing press is 10-900mm/s.
7. device according to claim 5, is characterized in that, in described upper die and lower die, patrix material pressing core and counterdie material pressing core, at least one adopts high-quality mould steel, and Dievar, SKD61 or H13 make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055976.4U CN203876278U (en) | 2014-01-28 | 2014-01-28 | Pressing machine hydraulic push rod apparatus for segmental reinforcement part for hot formed steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055976.4U CN203876278U (en) | 2014-01-28 | 2014-01-28 | Pressing machine hydraulic push rod apparatus for segmental reinforcement part for hot formed steel plate |
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| Publication Number | Publication Date |
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| CN203876278U true CN203876278U (en) | 2014-10-15 |
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|---|---|---|---|
| CN201420055976.4U Expired - Fee Related CN203876278U (en) | 2014-01-28 | 2014-01-28 | Pressing machine hydraulic push rod apparatus for segmental reinforcement part for hot formed steel plate |
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| CN (1) | CN203876278U (en) |
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- 2014-01-28 CN CN201420055976.4U patent/CN203876278U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160601 Address after: 214145 Jiangsu Province, Wuxi City District Hongshan Street Photoelectric Industrial Park Hongda Road No. 111 Patentee after: Wuxi Co., Ltd of Lang Xian motor vehicle assembly research and development centre Address before: 214028 Jiangsu New District of Wuxi City Xinda Road No. 33-2 building A408 IC design Patentee before: WUXI HONGXUAN AUTO LIGHTWEIGHTING SCIENCE & TECHNOLOGY CO., LTD. Patentee before: Chen Yang |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160701 Address after: 214028 Jiangsu city of Wuxi province new Wu Quhong Hill Street Kam Hung Road No. 309 Patentee after: WUXI HONGXUAN AUTO LIGHTWEIGHTING SCIENCE & TECHNOLOGY CO., LTD. Address before: 214145 Jiangsu Province, Wuxi City District Hongshan Street Photoelectric Industrial Park Hongda Road No. 111 Patentee before: Wuxi Co., Ltd of Lang Xian motor vehicle assembly research and development centre |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20170128 |