CN102632125B - Plate differential temperature hydroforming device capable of realizing radial pressurizing and hydraulic blank pressing - Google Patents
Plate differential temperature hydroforming device capable of realizing radial pressurizing and hydraulic blank pressing Download PDFInfo
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- CN102632125B CN102632125B CN201210094347.8A CN201210094347A CN102632125B CN 102632125 B CN102632125 B CN 102632125B CN 201210094347 A CN201210094347 A CN 201210094347A CN 102632125 B CN102632125 B CN 102632125B
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Abstract
The invention provides a plate differential temperature hydroforming device capable of realizing radial pressurizing and hydraulic blank pressing, which comprises a male die, a blank holder, a female die, a pressurizing device, an electromagnetic proportional overflow valve and a fluid heating device. A female die cavity arranged inside the female die is connected with a high-pressure end of the pressurizing device through a filling hole, the blank holder is arranged on the female die, a blank holder cavity arranged at the bottom of the blank holder is connected with the high-pressure end of the pressurizing device through a filling hole, and the high-pressure end and a low-pressure end of the pressurizing device are connected with the fluid heating device and the electromagnetic proportional overflow valve respectively. By the aid of the hydroforming device and by means of radial pressurizing, hydraulic blank pressing and differential temperature hydroforming, the forming performance of a plate can be improved, and parts with more complicated shapes, higher drawing ratio and higher requirements on dimensional precision can be formed.
Description
Technical field
The present invention relates to sheet material topping up thermal forming device, particularly a kind of sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging.
Background technology
In recent years, along with environmental pollution, and the problem of the energy and shortage of raw materials is on the rise, Aero-Space, automobile etc. manufacture structure lightweight, the integration in field, the demand of best quality is increasing, makes much sheet material be subject to day by day paying close attention to widely as aluminium alloy, magnesium alloy, titanium alloy, unimach, high temperature alloy or composite etc.Although these materials have many advantages, but compare traditional material as mild steel etc., the shortcoming such as itself have that more serious anisotropy, stress are concentrated obviously, resilience is serious and temperature-room type plasticity is poor, formation of parts precision is low and forming period is long, greatly increase manufacture difficulty and the cost of part, had a strong impact on the commercial Application of product.Therefore, the difficult problem that is shaped under normal temperature, has become the bottleneck that these new materials further expand application, has seriously hindered its application.
Nearest new forming technique---the sheet material topping up hot forming technology of research and development has been brought into play the two-fold advantage of sheet material warm forming and sheet material liquid-filling shaping simultaneously, can significantly improve the forming property of the poor sheet material of plasticity under normal temperature.Yet along with the energy, environmental issue are increasingly serious, and the proposition of low-carbon (LC) living awareness, structure lightweight, integration require to improve constantly, complicated overall structure constantly occurs, some are more complicated, even if being also difficult to realize Integratively than the larger existing sheet material topping up of overall structure part hot forming technology, pull and stretch is shaped, some parts have to adopt multi-step forming, or the method that partial plastic forming welds is again manufactured, and will certainly cause like this technique redundancy, formation of parts precision is low, and cost is high, and the cycle is long.This just needs innovation and the improvement of process or version, carrys out the crystallized ability of abundant excavated material.
At publication number, be in the patent of invention in CN 101274343A, disclose a kind of device that improves For The Forming Limit of Sheet Metals.This device is comprised of upper mould device, lower cavity die, fluid pressure generation device A, fluid pressure generation device B, overflow valve A and overflow valve B, forms back pressure die cavity between the blank holder in upper mould device and punch.This invention belongs to the device of the raising For The Forming Limit of Sheet Metals of another kind of form, this device is not considered the raising of the flange position material forming ability of deformation extent maximum in sheet forming process, the heating unit of this invention is directly placed in die in addition, this need to be heated to very high-temperature mould inside, by heat, conduct and add hot fluid medium and plate again, the efficiency of heating surface is low, and power consumption is large, and is difficult to realize accurate temperature control.
Summary of the invention
The object of this invention is to provide a kind of differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging, to improve the forming property of sheet material, realize the part forming that shape is more complicated, pull and stretch ratio is higher, dimension precision requirement is higher.
For solving the problems of the technologies described above, a kind of sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging provided by the invention, comprising: punch, blank holder, die, the first supercharging device, the second supercharging device, the first electromagnetic proportion relief valve, the second electromagnetic proportion relief valve, first fluid heater, second fluid heater;
Plate is between described die and described blank holder; Described die inside is provided with die cavity, die bottom is provided with liquid injection hole, described liquid injection hole is communicated with described die cavity, liquid injection hole external port is connected with the high-pressure side of described the first supercharging device, the first supercharging device high-pressure side is connected with described first fluid heater by check valve, high-temperature pump simultaneously, and the first supercharging device low-pressure end is connected with described the first electromagnetic proportion relief valve; Described blank holder is arranged on described die by sealing ring, blank holder bottom is provided with blank holder cavity, blank holder side is provided with liquid injection hole, described liquid injection hole is communicated with described blank holder cavity, liquid injection hole external port is connected with the high-pressure side of described the second supercharging device, and the second supercharging device high-pressure side is connected with described second fluid heater by check valve, high-temperature pump simultaneously; The low-pressure end of the second supercharging device is connected with described the second electromagnetic proportion relief valve; One end of described punch is positioned in the middle of described blank holder.
Further, described blank holder cavity forms a closed cavity on described die and plate.
Further, in the middle of described blank holder, be hollow structure, coaxial with described die cavity.
Further, described first fluid heater, second fluid heater provide heat-resisting fluid media (medium) in described die cavity, described blank holder cavity, and described heat-resisting fluid media (medium) is heat resistant oils, gas, low-melting-point metal or high temperature resistant powder.
Further, be provided with electric heating unit to described heat-resisting fluid media (medium) heating in described first fluid heater, second fluid heater, described heating unit is heating tube, heater strip or other heating element heaters.
Further, described first fluid heater, second fluid heater are to control separately separately heating.
Further, described punch inside is provided with cooling water channel.
Further, described sealing ring is high temperature high voltage resistant sealing ring and is arranged on described die.
Further, the first described supercharging device, the second supercharging device are all a kind of piston super chargers.
A kind of differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging provided by the invention, by hydraulic pressure flanging, reduced the frictional force between plate and mould, by thickness of slab direction, apply radial thrust, significantly promoted material to flow, and heat-resisting fluid medium pressure applies and above-mentioned attainable temperature-differential forming, effectively realized the combined shaping of the sheet material differential temperature topping up that can greatly improve For The Forming Limit of Sheet Metals, given full play to the crystallized ability of sheet material, the Integratively that can realize difficult moulding material complex parts is shaped, thereby can promote the expansion application of novel difficult moulding material.
Accompanying drawing explanation
The sheet material differential temperature liquid-filling shaping device schematic diagram of realizing radially pressurization and hydraulic pressure flanging that Fig. 1 provides for the embodiment of the present invention.
The shaping starting stage schematic diagram of the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging that Fig. 2 provides for the embodiment of the present invention.
The enlarged diagram at A place in Fig. 1 that Fig. 3 provides for the embodiment of the present invention.
The specific embodiment
Referring to Fig. 1, a kind of sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging that the embodiment of the present invention provides, comprising: punch 18, blank holder 15, die 7, the first supercharging device 2, the second supercharging device 11, the first electromagnetic proportion relief valve 1, the second solenoid-operated proportional overflow 10, first fluid heater 5 and second fluid heating 14 devices.
Plate 20 is between die 7 and blank holder 15; Die 7 inside are provided with die cavity 8, die 7 bottoms are provided with liquid injection hole 6, liquid injection hole 6 is communicated with die cavity 8, liquid injection hole 6 external port are connected with the high-pressure side of the first supercharging device 2, the high-pressure side of the first supercharging device 2 is connected with first fluid heater 5 by check valve 3, high-temperature pump 4 simultaneously, and the low-pressure end of the first supercharging device 2 is connected with the first electromagnetic proportion relief valve 1; Blank holder 15 is arranged on die 7 by sealing ring 9, and wherein, sealing ring 9 is arranged on die 7; Blank holder 15 bottoms are provided with blank holder cavity 17, blank holder 15 sides are provided with liquid injection hole 16, liquid injection hole 16 is communicated with blank holder cavity 17, liquid injection hole 16 external port are connected with the high-pressure side of the second supercharging device 11, the high-pressure side of the second supercharging device 11 is connected with second fluid heater 14 by check valve 12, high-temperature pump 13 simultaneously, and the low-pressure end of the second supercharging device 11 is connected with the second solenoid-operated proportional overflow 10; One end of punch 18 is positioned in the middle of blank holder 15.
Wherein, blank holder cavity 17 forms a closed cavity on die 7 and plate 20.
Wherein, in the middle of blank holder 15, be hollow structure, coaxial with die cavity 8.
Wherein, first fluid heater 5, second fluid heater 14 provide heat-resisting fluid media (medium) in described die cavity 8, described blank holder cavity 17, and heat-resisting fluid media (medium) is heat resistant oils, gas, low-melting-point metal or high temperature resistant powder.
Wherein, be provided with electric heating unit to described heat-resisting fluid media (medium) heating in first fluid heater 5, second fluid heater 14, heating unit is heating tube, heater strip or other heating element heaters.
Wherein, first fluid heater 5, second fluid heater 14 are to control separately separately heating.
Wherein, punch 18 inside are provided with cooling water channel 19.
Wherein, sealing ring 9 is high temperature high voltage resistant sealing ring and is arranged on described die 7.
Wherein, the first supercharging device 2, the second supercharging device 11 are all a kind of piston super chargers.
The interior heat-resisting fluid media (medium) of blank holder cavity 17 is first in second fluid heater 14, by heating unit, to heat, reach the high-pressure side that injects the second supercharging devices 11 after design temperature by high-temperature pump 13, check valve 12, through the pressurization control of carrying out of the second supercharging device 11 and the first electromagnetic proportion relief valve 10, by liquid injection hole 16, be filled in blank holder cavity 17 again.
The interior heat-resisting fluid media (medium) of die cavity 8 is first in first fluid heater 5, by heating unit, to heat, reach the high-pressure side that injects the first supercharging devices 2 after design temperature by high-temperature pump 4, check valve 3, through the pressurization control of carrying out of the first supercharging device 2 and the first electromagnetic proportion relief valve 1, by liquid injection hole 6, be filled in die cavity 8 again.
A kind of differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging provided by the invention concrete processing step when sheet forming is as follows:
(1), open first fluid heater 5 and second fluid heater 14, by the heat-resisting fluid media (medium) of these two parts, the heating unit by is separately heated to the temperature of setting separately respectively, and the insulation regular hour;
(2), the fluid media (medium) arriving in the first fluid heater 5 of design temperature is injected to the high-pressure side of the first supercharging devices 2 by high-temperature pump 4 and check valve 3, inject completely, close high-temperature pump 4 and check valve 3 simultaneously;
(3), open the first supercharging device 2, control the first electromagnetic proportion relief valve 1 heat-resisting fluid media (medium) be filled in die cavity 8 by liquid injection hole 6, when heat-resisting fluid media (medium) surface and die 7 die orifices are when concordant, stop injection;
(4), place plate 20 on die 7 surfaces;
(5), control blank holder 15 comes downwards to plate 20 and contacts, and defeat a little plate 20, the fluid media (medium) arriving in the second fluid heater 14 of design temperature is injected to the high-pressure side of the second supercharging devices 11 by high-temperature pump 13 and check valve 12 simultaneously, inject completely, close high-temperature pump 13 and check valve 12 simultaneously;
(6), open the second supercharging device 11, heat-resisting fluid media (medium) is filled in the closed cavity that blank holder cavity 17 and die 7 and plate 20 form by liquid injection hole 16.
(7), the interior heat-resisting fluid media (medium) pressurize certain hour of blank holder cavity 17,, by the heat-resisting fluid media (medium) in the interior heat-resisting fluid media (medium) of blank holder cavity 17 and die cavity 8, sheet material is heated, until required temperature meanwhile;
(8), control punch 18 descending, recirculated cooling water is injected to cooling water channel 19 simultaneously, when punch 18 comes downwards to a certain ad-hoc location of plate upper surface, punch 18 stops descending, heat-resisting fluid media (medium) in die cavity 8 is implemented supercharging by the first supercharging device 2 and the first electromagnetic proportion relief valve 1, be pressurized to a certain setting value, keep pressure constant, realize initially anti-inflation, as shown in Figure 2, initial anti-inflationly can set up liquid chamber pressure at the shaping initial stage, change the stress state of punch 18 fillet place blanks, form well friction and keep effect, thereby the generation that the initial stage sheet material of avoiding being shaped breaks,
(9), when initial anti-inflation arrival setting-up time, punch 18 is descending, simultaneously by the first electromagnetic proportion relief valve 1, the second electromagnetic proportion relief valve 10, and the hydraulic system of blank holder 15, according to the displacement of punch 18, regulate in real time the pressure of die cavity 8 interior heat-resisting fluid media (medium)s and blank holder cavity 17 interior heat-resisting fluid media (medium)s, and the pressure of blank holder 15, until be shaped, be over, in this forming process, heat-resisting fluid media (medium) applies radial thrust to plate 20 in thickness of slab direction, in the vertical direction of plate 20 flanges, apply hydraulic pressure pressure-pad-force, as P in Fig. 1 and Fig. 3
1shown in, realized hydraulic pressure flanging and sheet feeding drive to pressurization feed supplement,
(10), by the heat-resisting fluid media (medium) pressure release of heat-resisting fluid media (medium) in blank holder cavity 17 and in die cavity 8, punch 18 and blank holder 15 are up, take out part, machine.
The present invention can realize the sheet material differential temperature liquid-filling shaping device of radially pressurization and hydraulic pressure flanging, in forming process due to plate different parts respectively with punch 18, the interior heat-resisting fluid media (medium) of blank holder cavity 17, and the heat-resisting fluid media (medium) contact in die cavity 8, because being connected with cooling water in punch 18, in blank holder cavity 17 and the interior heat-resisting fluid media (medium) that is connected with respectively different temperatures of die cavity 8, therefore in the process of sheet material forming, different temperature gradient distribution can be realized in the different position of plate, can realize temperature-differential forming, improve forming limit.
A kind of sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging that the embodiment of the present invention provides has the following advantages:
1, by the heat-resisting fluid media (medium) in blank holder cavity, realize hydraulic pressure flanging, can significantly reduce the frictional force between plate and mould, improve sheet material forming performance, reduce equipment tonnage, improve die life.
2, by the heat-resisting fluid media (medium) in blank holder cavity, in thickness of slab direction, realize radial thrust, promote sheet material to flow, can greatly improve sheet material forming performance, can realize the once-forming of complex thin-wall component, avoided the annealing between multi-step forming and passage, save die cost, improved production efficiency, reduced production cost.
3, by being connected with heat-resisting fluid media (medium) in cooling water, blank holder cavity in punch cooling water channel, and the heat-resisting fluid media (medium) in die cavity can be controlled respectively different temperature, in the process of sheet material forming, different temperature gradient distribution can be realized in the different position of plate, can realize temperature-differential forming, improve forming limit.
4, can realize the combined shaping of sheet material differential temperature topping up, give full play to the crystallized ability of sheet material, promote the expansion application of new material.
5, the pressure of the heat-resisting fluid media (medium) in blank holder cavity and the heat-resisting fluid media (medium) in die cavity, can control in real time by electromagnetic proportion relief valve, can conveniently realize the real-time control of pressure variable edge force control and hydraulic pressure.
6, heat-resisting fluid media (medium) is that fluid heater by mould outside heats, and than only depending on the electric heating element on mould to heat, efficiency is much higher, and energy loss is few like this, and temperature is controlled accurately.
7, heat-resisting fluid media (medium) is that fluid heater by mould outside heats, and the heating of forming process and follow-up required heat-resisting fluid media (medium) and insulation can be carried out respectively simultaneously, have improved operating efficiency.
8, can realize the application of the kinds of processes such as sheet material liquid-filling shaping under sheet material liquid-filling shaping, high temperature under normal temperature.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (7)
1. the sheet material differential temperature liquid-filling shaping device that can realize radially pressurization and hydraulic pressure flanging, it is characterized in that, comprising: punch, blank holder, die, the first supercharging device, the second supercharging device, the first electromagnetic proportion relief valve, the second electromagnetic proportion relief valve, first fluid heater and second fluid heater;
Described die inside is provided with die cavity, die bottom is provided with the first liquid injection hole, described the first liquid injection hole is communicated with described die cavity, the first liquid injection hole external port is connected with the high-pressure side of described the first supercharging device, the first supercharging device high-pressure side is connected with described first fluid heater by the first check valve, the first high-temperature pump simultaneously, and the first supercharging device low-pressure end is connected with described the first electromagnetic proportion relief valve, plate is between described blank holder and described die, described blank holder is arranged on described die by sealing ring, described blank holder bottom is provided with blank holder cavity, described blank holder cavity forms a closed cavity on described die and plate, described blank holder side is provided with the second liquid injection hole, described the second liquid injection hole is communicated with described blank holder cavity, the second liquid injection hole external port is connected with the high-pressure side of described the second supercharging device, the second supercharging device high-pressure side is simultaneously by the second check valve, the second high-temperature pump is connected with described second fluid heater, the low-pressure end of the second supercharging device is connected with described the second electromagnetic proportion relief valve, by the pressurization of the second supercharging device, heat-resisting fluid media (medium) in blank holder cavity applies radial thrust to plate in the thickness of slab direction of plate, in vertical direction plate is applied to hydraulic pressure pressure-pad-force, realize hydraulic pressure flanging and sheet feeding drive to pressurization feed supplement, one end of described punch is positioned in the middle of described blank holder, when described punch is during to described sheet-metal press working, according to line displacement under described punch, by controlling described the first supercharging device and the second supercharging device, can regulate in real time respectively heat-resisting fluid media (medium) in described die cavity and the described blank holder cavity pressure to plate, described first fluid heater and second fluid heater are controlled separately heating separately, described first fluid heater is separately to entering the heat-resisting fluid media (medium) heating in described die cavity, and second fluid heater is separately to entering the heat-resisting fluid media (medium) heating in described blank holder cavity.
2. the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 1, is characterized in that:
In the middle of described blank holder, be hollow structure, coaxial with described die cavity.
3. the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 1, is characterized in that:
Described first fluid heater, second fluid heater provide heat-resisting fluid media (medium) in described die cavity, described blank holder cavity, and described heat-resisting fluid media (medium) is heat resistant oils, gas, low-melting-point metal or high temperature resistant powder.
4. a kind of sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 3, is characterized in that:
In described first fluid heater, second fluid heater, be provided with electric heating unit to described heat-resisting fluid media (medium) heating, described heating unit is heating tube, heater strip or other heating element heaters.
5. the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 1, is characterized in that:
Described punch inside is provided with cooling water channel.
6. the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 1, is characterized in that:
Described sealing ring is high temperature high voltage resistant sealing ring and is arranged on described die.
7. the sheet material differential temperature liquid-filling shaping device of realizing radially pressurization and hydraulic pressure flanging according to claim 1, is characterized in that:
The first described supercharging device, the second supercharging device are all a kind of piston super chargers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210094347.8A CN102632125B (en) | 2012-04-01 | 2012-04-01 | Plate differential temperature hydroforming device capable of realizing radial pressurizing and hydraulic blank pressing |
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| CN201210094347.8A CN102632125B (en) | 2012-04-01 | 2012-04-01 | Plate differential temperature hydroforming device capable of realizing radial pressurizing and hydraulic blank pressing |
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| CN102632125B true CN102632125B (en) | 2014-09-17 |
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| CN103191971A (en) * | 2013-04-01 | 2013-07-10 | 哈尔滨工业大学 | Electromagnetism-assisted forming device and method for dissimilar metal composite boards |
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| CN114472664A (en) * | 2021-12-08 | 2022-05-13 | 周富强 | Ultrathin metal sheet forming method and mold |
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| JPS5836413Y2 (en) * | 1978-06-12 | 1983-08-16 | 三菱電機株式会社 | Thin plate forming equipment |
| JPH06297047A (en) * | 1993-04-16 | 1994-10-25 | Nippon Steel Corp | Oppositely hydrostatic deep-drawing device |
| CN100464890C (en) * | 2005-12-19 | 2009-03-04 | 河南科技大学 | Method for forming magnesium alloy pipe fitting |
| CN101318205B (en) * | 2008-06-24 | 2010-06-02 | 南京航空航天大学 | Circumferential nature supercharging plate liquid filling deep-drawing forming method and apparatus |
| CN102284588B (en) * | 2011-06-13 | 2014-11-12 | 北京航空航天大学 | Device for improving forming limit of plate |
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