CN103658292A - Normal temperature or thermal state fluid reconfigurable die bulging system and bulging method - Google Patents
Normal temperature or thermal state fluid reconfigurable die bulging system and bulging method Download PDFInfo
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- CN103658292A CN103658292A CN201310349834.9A CN201310349834A CN103658292A CN 103658292 A CN103658292 A CN 103658292A CN 201310349834 A CN201310349834 A CN 201310349834A CN 103658292 A CN103658292 A CN 103658292A
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Abstract
Provided are a normal temperature or thermal state fluid reconfigurable die bulging system and a bulging method. Following the development of the society, complex hyperbolic plates are used more and more in numerous industries such as planes, ships, high-speed locomotives, automobiles and even buildings. The normal temperature or thermal state fluid reconfigurable die bulging system comprises a press machine with oil cylinders (1), wherein the press machine is arranged on a press machine lower platform (2), the press machine lower platform is connected with a blank holder system, a plate (3) penetrates through the blank holder system or plate stretch forming equipment (5), a soft cushion layer (4) is arranged on the plate, a fluid medium heating device system is arranged below the plate, the soft cushion layer is connected with a reconfigurable die system, and the reconfigurable die system is connected with a press machine sliding block (6). The bulging method is applied to the normal temperature or thermal state fluid reconfigurable die bulging system.
Description
technical field:
the present invention relates to a kind of normal temperature for sheet material forming or hot fluid reconfigurable die bulging system and expanding method.
background technology:
along with social development, complicated hyperbolic sheet material, in all conglomeraties such as aircraft, boats and ships, express locomotive, automobile and even building, is more and more used.People not only require the hyperboloid that is shaped different, require again that its forming accuracy is high, production efficiency is high, surface quality is good, material thickness is even.This has just proposed great challenge to sheet material forming technique.
in traditional plate manufacturing process, hand finishing method, because production efficiency is low, machining accuracy is low, be not suitable for production in enormous quantities, does not occupy leading position in sheet forming.Fixing i.e. not high, the applicable production in enormous quantities of restructural die forming method production efficiency precision high, workpiece, for many years always in occupation of leading position.But shortcoming be fixing not the restructural mould design and manufacture cycle long, maintenance cost is high, and the part that is shaped needs a mould even sometimes to need a plurality of moulds, causes new product development cycle long, cost is high, and product slightly makes to change rear mold need to redesign replacing.
along with the development of aircraft, boats and ships, express locomotive, car industry, often need large-scale sheet material to form, the shaping that traditional handicraft is made large-sized sheet material needs large-tonnage, large-sized plant equipment.Such equipment manufacturing cost is high, and fabrication cycle is long, consumes energy huge simultaneously, lacks flexibility, can not meet the demand of model change.
therefore, the sheet forming technology of some new shapes is arisen at the historic moment, as: contour peening, laser forming, water jet freeform fabrication, digitlization progressive molding, non-mould multi-point forming etc.Yet the sheet forming technology of these several new shapes also exists some shortcomings and limitations, the limitation of contour peening is spherical deformation trend, it is limited to be out of shape, restrictive condition is harsh, influence factor is various etc.; The shortcoming of laser forming is that cost is high, is not easy to control; Water jet freeform fabrication also needs constantly perfect, also has a lot of problems in practical application; The shortcomings such as digitlization progressive molding need to be made mould, and processing cost is high, the cycle is long, and surface quality is poor; Compare with front several forming techniques, non-mould multi-point forming technology has lot of advantages: realize mouldless shaping, optimize deformation path, skinny device is shaped large shape part, easily be automated.
multiple spot freeform fabrication is divided into according to forming mode: multiple spot is to pressing formation technology and multiple spot stretch forming technology.Multiple spot when running into local curvature and change greatly, easily occur gauffer, and springback capacity is larger to pressing formation technology.Multiple spot stretch forming technology, compares multiple spot to pressing formation technology, and its springback capacity is little, forming accuracy is higher, wrinkle resistant pleat.Multiple spot is now all to adopt mechanical stretching form without closing mould stretching forming technique, for example, with clamp, clamp plate and carry out mechanical stretching.And also there is following defect in mechanical stretching forming mode: easily form stress concentration phenomenon in slab interior, the metal material low for a lot of intensity, percentage elongation is little and some curvature change the curved surface compared with greatly, in drawing process, easily produce and tear.Waste very much material.In today of resource shortage like this, this waste seems and particularly should not.Be no matter multiple spot to pressing formation technology or multiple spot stretch forming technology, resilience is large, forming accuracy is not high.
for most of magnesium alloys, because material has Patterns for Close-Packed Hexagonal Crystal structure, under magnesium alloy room temperature, plastic deformation ability is poor, the part of the complicated shape that is difficult to be shaped.When temperature raises, the plastic deformation ability of magnesium alloy is greatly improved.Aluminium alloy percentage elongation at high temperature, than high a lot of under room temperature, can be realized complex parts and be shaped.Normal temperature or hot fluid reconfigurable die bulging system develop exactly on normal temperature multiple spot mouldless shaping basis.
summary of the invention:
the object of this invention is to provide a kind ofly for different materials, adopt different forming temperatures and corresponding pressure medium; For middle warm working, can adopt special-purpose heat resistant oils as pressure medium, can meet the shaping of the materials such as aluminium alloy, magnesium alloy; For high warm forming, can adopt fused salt or gas as shaping medium, be applicable to the high-temperature alloy materials such as titanium alloy, nickel-base alloy.
above-mentioned object realizes by following technical scheme:
a kind of normal temperature or hot fluid reconfigurable die bulging system, its composition comprises: with the forcing press of oil cylinder, described forcing press is contained on forcing press lower platform, described forcing press lower platform connects blank holder system, sheet material is through described blank holder system or plate stretch-forming equipment, described sheet material top has flexible cushion, described sheet material below has fluid media (medium) heater system, described flexible cushion connects reconfigurable die system, described reconfigurable die system Bonding pressure machine slide block.
described normal temperature or hot fluid reconfigurable die bulging system, described reconfigurable die system comprises reconfigurable die element body, described reconfigurable die element body connects rotatable Universal-head or fixing bulb, described rotatable Universal-head or described fixedly bulb connect described flexible cushion, described reconfigurable die element body connects reconfigurable die housing, reconfigurable die is housed in described reconfigurable die housing and adjusts shape system.
described normal temperature or hot fluid reconfigurable die bulging system, described fluid media (medium) heater system comprises the fluid media (medium) chamber with temperature thermocouple, in described fluid media (medium) chamber, liquid medium or hydraulic bag are housed, described fluid media (medium) chamber is all connected temperature control system with described temperature thermocouple, described fluid media (medium) chamber connection control system, described control system connects booster, described booster connects cold and hot converting unit, between described fluid media (medium) chamber and described cold and hot converting unit, high temperature check valve is housed, described high temperature check valve connects hot oil pump, described hot oil pump connects thermal medium preheating cabinet, described hydraulic bag has outer hoop part outward.
described normal temperature or hot fluid reconfigurable die bulging system, described blank holder system comprises flexible blank holder system or fixing blank holder system, described flexible blank holder system comprises hydraulic cylinder under flexible blank holder, under described flexible blank holder, hydraulic cylinder connects lower flexible blank holder, described lower flexible blank holder top has upper flexible blank holder, described upper flexible blank holder connects hydraulic cylinder on flexible blank holder, and described sheet material is through between described upper flexible blank holder and described lower flexible blank holder.
described normal temperature or hot fluid reconfigurable die bulging system, described forcing press is single-power forcing press or two single-power forcing press.
described normal temperature or hot fluid reconfigurable die bulging system, described hydraulic bag connects drain pipe and feed tube, and described drain pipe is connected Hydraulic Station with described feed tube.
described normal temperature or hot fluid reconfigurable die bulging system, the end of the end of described reconfigurable die element body and described upper flexible blank holder, described lower flexible blank holder is all provided with fixedly bulb or rotatable Universal-head, and described fixedly bulb or rotatable Universal-head connect described flexible cushion.
an expanding method for normal temperature or hot fluid reconfigurable die bulging system, fluid pressure medium water or oil or gas, carry out preheating at thermal medium preheating cabinet; After temperature reaches normal temperature or hot requirement, by hot oil pump, the hot medium in thermal medium preheating cabinet is input in fluid pressure medium chamber, it is booster that the supercharging in fluid pressure medium chamber relies on high-voltage power supply; Due to the restriction of sealing original paper and high pressure servo valve, booster can not directly drive thermal medium, therefore between the hot medium in booster and hot media preheating case, sets up a cold and hot converting unit; Cold and hot converting unit one end connects booster, and the cold and hot converting unit other end connects thermal medium preheating cabinet and fluid pressure medium chamber; So isolated coming between thermal medium and booster, the action of booster still can be controlled by servo valve is accurate, is not subject to hot medium temperatures involved, and cold and hot converting unit can by the pressure 1:1 of booster be delivered in fluid pressure medium chamber; Temperature in fluid pressure medium chamber is by thermocouple measurement and feed back to temperature control system, and by temperature control system heating maintenance, treats machining sheet and be out of shape needed temperature; Before supercharging, under the effect of hot oil pump, the piston of cold and hot converting unit is pushed to low-temperature zone, and thermal medium is imported into the temperature end of cold and hot converting unit when being input to fluid pressure medium chamber; During supercharging, the high-pressure fluid of booster output enters the low-temperature end of cold and hot converting unit and will promote converting unit piston, and then the high-temperature high-pressure medium in cold and hot converting unit is promoted to fluid pressure medium chamber; Now, if booster backhaul, cold and hot converting unit temperature end pressure drop, hot oil pump can be pushed check valve open again, and thermal medium is added to cold and hot converting unit temperature end, and for pressurization next time; Fluid media (medium) is by temperature control system Automatic-heating and insulation, to fixedly bulb or rotatable Universal-head are taked heat insulation and cooling provision; By single action press, provide mold clamping force, the workpiece of shaping special shape adopts double action press.
the expanding method of described normal temperature or hot fluid reconfigurable die bulging system, upper blank holder and lower blank holder can be also flexible pressure-adjustable flanges, also can adopt without flanging and draw limit mode, La Bian can adopt both sides to draw the mode of limit or four Bian Labian; Reconfigurable die element body is screw lift structure, by the rotation of screw mandrel, realizes feed screw nut's lifting, or reconfigurable die element body is hydraulicefficiency elevation structure, by the mobile lifting that realizes piston of liquid; Flexible cushion adopts macromolecule flexible material, can be polyurethane sheet or polyamide board or rubber slab polymer composite, flexible cushion can be also the low yield stress metal material of thin-walled or in macromolecule flexible material composition metal intermediate plate, flexible cushion lower surface needs composite and flexible high temperature resistant heat insulation material.According to Forming Workpiece profile feature and Forming Workpiece material, determine; Fluid media (medium) is equipped with high-pressure fluid in chamber, and fluid media (medium) chamber adopts exotic material, according to Forming Workpiece profile feature and Forming Workpiece material, determines; Rotatable Universal-head be take rotatable Universal-head top center point as centre of sphere rotation, in rotation process, the vertical coordinate of top center point does not change, described fixedly bulb or rotatable Universal-head are detachable, according to profile surface form, change, described fixedly bulb is macromolecular material or metal material, according to shaped sheet material and shape, determines; Multiple spot mould control system adopts control system or the control system based on microprocessor or the control system based on PLC or the special-purpose kinetic control system based on PC; The temperature of normal temperature is room temperature, and hot temperature is 150-800 ℃.
beneficial effect:
1. the present invention is comprised of numerical control reconfigurable die, fluid Bulging Technology, fluid media (medium) normal temperature or heating feedway, has saved time and the expense of making mould, and resilience is little, and forming accuracy is high, and surface quality is good, and sheet material attenuate amount is even, and forming limit is high.
2. fluid normal temperature of the present invention or hot reconfigurable die bulging system, the fluid Bulging Technology of fluid media (medium) normal temperature or heating feedway and sheet material is combined, formed uniform force application, distortion smoothness, forming limit is high, forming quality good, forming accuracy is high, do not damage fluid normal temperature or the hot reconfigurable die fluid forming method of reconfigurable die.
3. the present invention is applicable to the manufacturing process of the easy or difficult form metals of room temperature such as steel, aluminium alloy, magnesium alloy, stainless steel, titanium alloy and ni-base wrought superalloy, sheet alloy.Its principle is to exert pressure by normal temperature or hot fluid media (medium), makes sheet material according to the shape of the reconfigurable die setting complicated curved surface that is shaped.
4. the hot bulging of the present invention has been compared following two obvious advantages with normal temperature fluid bulging; The one, improve For The Forming Limit of Sheet Metals, increase part complexity; The 2nd, reduce forming pressure.
5. the present invention has realized mouldless shaping by the control of each element body motion is constructed to various profile surface, can replace traditional unitary mould and save required human and material resources and the financial resources such as mould design and manufacture, debugging and preservation, shorten significantly life cycle of the product, reduce production costs, improve the competitiveness of product; Compare with die forming method, not only save the expense of processing and manufacturing mould, and save a large amount of repairing a die and the mode transfer time; Compare with hand finishing method, the Product Precision of shaping is high, quality good, and has significantly improved production efficiency.
6. the present invention has realized automation, and curved surface appearance adopts area of computer aided, realizes the integrated production of CAD/CAM/CAE, and operating efficiency is high, and labour intensity is little, has greatly improved labourer's operating environment.
7. the present invention improves For The Forming Limit of Sheet Metals, increases part complexity; Take magnesium alloy as example, adopt hot oil as power transmission medium, make sheet material 200 ℃ ~ 300 ℃ shapings, because sheet material plasticity significantly improves, make the shaping of large expansion rate and complicated non-uniform member become possibility.
8. the present invention has reduced forming pressure, and because the hot lower material profit that flows is low, the part transition fillet required pressure that is shaped is low, with room temperature shaping ratio, can reduce forming pressure, increases the shaping scope of system and device.Under same forming pressure, hot shaping can obtain less knuckle, and more complicated part therefore can be shaped.
9. forming limit of the present invention is high, due to the effect of hydraulic pressure in hydraulic expanding-forming, blank and die is tightly fitted, and produces " friction keeps effect ", has improved the bearing capacity of force transmission region; What is more important, complex curved surface parts for automobile manufacturing field, oppositely the effect of hydraulic pressure forms " soft drawn is stretched muscle deeply ", eliminate suspension area, between blank and mould, setting up useful friction reduces the radially tension of fillet place, die bottom blank, strain track is skew left on forming limit figure, can significantly improve forming limit, and two tensile stress states such as grade that traditional pull and stretch is stretched easily cause drawing crack.
10. forming accuracy of the present invention is high, and multiple spot mould adjusts shape to adopt closed-loop control, and tune shape precision is controlled to micron order; The fixedly bulb of multiple spot mould element body end or rotatable Universal-head be take summit as centre of sphere rotation, have eliminated the camber line error of common round end element body; Use shaped by fluid pressure bulging significantly to improve Forming Quality and the performance of workpiece, the laminating degree of workpiece and mould is good, and springback capacity is minimum.
11. sheet metal thickness attenuate amounts of the present invention are even, and residual stress is little; Hot hydroforming makes sheet material heating, and in the process being shaped, stressed evenly each point of workpiece enters plastic deformation uniformly, is out of shape well-balancedly, so the workpiece after being shaped all enters plastic period, even thickness, does not almost have residual stress.
accompanying drawing explanation:
accompanying drawing 1 be this product multipoint stream body heat state bulging system reconfigurable die upper, fluid media (medium) chamber under the structural representation of single action press.
accompanying drawing 2 is structural representations of the double action press of this product multipoint stream body heat state bulging system.
accompanying drawing 3 is rotatable Universal head structure schematic diagrames of accompanying drawing 1 and accompanying drawing 2.
accompanying drawing 4 is fixedly ball head structure schematic diagrames of accompanying drawing 1 and accompanying drawing 2.
accompanying drawing 5 is fluid media (medium) heater system schematic of accompanying drawing 1 and accompanying drawing 2.
accompanying drawing 6 be this product multipoint stream body heat state bulging system fluid dielectric cavity upper, reconfigurable die under the structural representation of single action press.
accompanying drawing 7 be this product multipoint stream body heat state bulging system fluid dielectric cavity upper, reconfigurable die under the structural representation of double action press.
accompanying drawing 8 is to draw limit structural representation in accompanying drawing 1, accompanying drawing 2, accompanying drawing 6, accompanying drawing 7.
accompanying drawing 9 is position views of flexible blank holder and reconfigurable die element body under the present invention.
the specific embodiment:
embodiment 1:
a kind of normal temperature or hot fluid reconfigurable die bulging system, its composition comprises: with the forcing press of oil cylinder 1, described forcing press is contained on forcing press lower platform 2, described forcing press lower platform connects blank holder system, sheet material 3 is through described blank holder system or plate stretch-forming equipment 5, described sheet material top has flexible cushion 4, described sheet material below has fluid media (medium) heater system, described flexible cushion connects reconfigurable die system, described reconfigurable die system Bonding pressure machine slide block 6.
described normal temperature or hot fluid reconfigurable die bulging system, described forcing press is single-power forcing press 7 or two single-power forcing press 8.
embodiment 2:
normal temperature described in embodiment 1 or hot fluid reconfigurable die bulging system, described reconfigurable die system comprises reconfigurable die element body 9, in described reconfigurable die element body, reconfigurable die 30 is housed, described reconfigurable die element body connects described flexible cushion, described reconfigurable die element body connects reconfigurable die housing 10, reconfigurable die is housed in described reconfigurable die housing and adjusts shape system 11.
embodiment 3:
normal temperature described in embodiment 1 or hot fluid reconfigurable die bulging system, described fluid media (medium) heater system comprises the fluid media (medium) chamber 13 with temperature thermocouple 12, liquid medium 14 or hydraulic bag 15 are housed in described fluid media (medium) chamber, described fluid media (medium) chamber is all connected temperature control system 16 with described temperature thermocouple, described fluid media (medium) chamber connects computer control system 17, described computer control system connects booster 18, described booster connects cold and hot converting unit 19, between described fluid media (medium) chamber and described cold and hot converting unit, high temperature check valve 20 is housed, described high temperature check valve connects hot oil pump 21, described hot oil pump connects thermal medium preheating cabinet 22, described hydraulic bag has outer hoop part 33 outward.
described normal temperature or hot fluid reconfigurable die bulging system, described hydraulic bag connects drain pipe 23 and feed tube 24, and described drain pipe is connected Hydraulic Station 25 with described feed tube.
embodiment 4:
normal temperature described in embodiment 1 or hot fluid reconfigurable die bulging system, described blank holder system comprises flexible blank holder system or fixing blank holder system, described flexible blank holder system comprises hydraulic cylinder 26 under flexible blank holder, under described flexible blank holder, hydraulic cylinder connects lower flexible blank holder 27, described lower flexible blank holder top has upper flexible blank holder 28, described upper flexible blank holder connects hydraulic cylinder 29 on flexible blank holder, and described sheet material is through between described upper flexible blank holder and described lower flexible blank holder.
embodiment 5:
normal temperature described above or hot fluid reconfigurable die bulging system, the end of the end of described reconfigurable die element body and described upper flexible blank holder, described lower flexible blank holder is all provided with fixedly bulb 31 or rotatable Universal-head 32, described fixedly bulb or rotatable Universal-head connect described flexible cushion, described fixedly bulb is macromolecular material or metal material, selects macromolecular material or metal material to determine according to shaped sheet material and shape.
embodiment 6:
an expanding method for normal temperature or hot fluid reconfigurable die bulging system, fluid pressure medium water or oil or gas, carry out preheating at thermal medium preheating cabinet; After temperature reaches normal temperature or hot requirement, by hot oil pump, the hot medium in thermal medium preheating cabinet is input in fluid pressure medium chamber, it is booster that the supercharging in fluid pressure medium chamber relies on high-voltage power supply; Due to the restriction of sealing original paper and high pressure servo valve, booster can not directly drive thermal medium, therefore between the hot medium in booster and hot media preheating case, sets up a cold and hot converting unit; Cold and hot converting unit one end connects booster, and the cold and hot converting unit other end connects thermal medium preheating cabinet and fluid pressure medium chamber; So isolated coming between thermal medium and booster, the action of booster still can be controlled by servo valve is accurate, is not subject to hot medium temperatures involved, and cold and hot converting unit can by the pressure 1:1 of booster be delivered in fluid pressure medium chamber; Temperature in fluid pressure medium chamber is by thermocouple measurement and feed back to temperature control system, and by temperature control system heating maintenance, treats machining sheet and be out of shape needed temperature; Before supercharging, under the effect of hot oil pump, the piston of cold and hot converting unit is pushed to low-temperature zone, and thermal medium is imported into the temperature end of cold and hot converting unit when being input to fluid pressure medium chamber; During supercharging, the high-pressure fluid of booster output enters the low-temperature end of cold and hot converting unit and will promote converting unit piston, and then the high-temperature high-pressure medium in cold and hot converting unit is promoted to fluid pressure medium chamber; Now, if booster backhaul, cold and hot converting unit temperature end pressure drop, hot oil pump can be pushed check valve open again, and thermal medium is added to cold and hot converting unit temperature end, and for pressurization next time; Fluid media (medium) is by temperature control system Automatic-heating and insulation, to fixedly bulb or rotatable Universal-head are taked heat insulation and cooling provision; By single action press, provide mold clamping force, the workpiece of shaping special shape adopts double action press.
embodiment 7:
the expanding method of the normal temperature described in embodiment 6 or hot fluid reconfigurable die bulging system, upper blank holder and lower blank holder can be also flexible pressure-adjustable flanges, also can adopt without flanging and draw limit mode, La Bian can adopt both sides to draw the mode of limit or four Bian Labian; Reconfigurable die element body is screw lift structure, by the rotation of screw mandrel, realizes feed screw nut's lifting, or reconfigurable die element body is hydraulicefficiency elevation structure, by the mobile lifting that realizes piston of liquid; Flexible cushion adopts macromolecule flexible material, can be polyurethane sheet or polyamide board or rubber slab polymer composite, flexible cushion can be also the low yield stress metal material of thin-walled or in macromolecule flexible material composition metal intermediate plate, flexible cushion lower surface needs composite and flexible high temperature resistant heat insulation material.According to Forming Workpiece profile feature and Forming Workpiece material, determine; Fluid media (medium) is equipped with high-pressure fluid in chamber, and fluid media (medium) chamber adopts exotic material, according to Forming Workpiece profile feature and Forming Workpiece material, determines; Rotatable Universal-head be take rotatable Universal-head top center point as centre of sphere rotation, in rotation process, the vertical coordinate of top center point does not change, described fixedly bulb or rotatable Universal-head are detachable, according to profile surface form, change, described fixedly bulb is macromolecular material or metal material, according to shaped sheet material and shape, determines; Multiple spot mould control system adopts control system or the control system based on microprocessor or the control system based on PLC or the special-purpose kinetic control system based on PC; The temperature of normal temperature is room temperature, and hot temperature is 150-800 ℃.
embodiment 8:
normal temperature described in above-described embodiment or hot fluid reconfigurable die bulging system, fluid media (medium) heater system, forcing press, reconfigurable die, flexible blank holder, fluid bulging system, shaping control system.
described fluid media (medium) heater system, fluid pressure medium (water, oil or gas) carries out preheating at thermal medium preheating cabinet.After temperature reaches requirement, by hot oil pump, the hot medium in thermal medium preheating cabinet is input to fluid pressure medium chamber.The supercharging in fluid pressure medium chamber relies on high-voltage power supply (booster).Due to the restriction of sealing original paper and high pressure servo valve etc., booster can not directly drive thermal medium, therefore between the hot medium in booster and hot media preheating case, sets up a cold and hot converting unit.This one end, unit connects booster, and the other end connects thermal medium preheating cabinet and fluid pressure medium chamber.So isolated coming between thermal medium and booster, the action of booster still can be controlled by servo valve is accurate, is not subject to hot medium temperatures involved, and converting unit can by the pressure 1:1 of booster be delivered to fluid pressure medium chamber.Temperature in fluid pressure medium chamber is by thermocouple measurement and feed back to temperature control system, and by this system heating maintenance, treats machining sheet and be out of shape needed temperature.Before supercharging, under the effect of hot oil pump, the piston of cold and hot converting unit is pushed to low-temperature zone, and thermal medium is imported into the temperature end of cold and hot converting unit when being input to fluid pressure medium chamber.During supercharging, the high-pressure fluid of booster output enters the low-temperature end of cold and hot converting unit and will promote converting unit piston, and then the high-temperature high-pressure medium in cold and hot converting unit is promoted to fluid pressure medium chamber.Now, if booster backhaul, cold and hot converting unit temperature end pressure drop, hot oil pump can be pushed check valve open again, and thermal medium is added to cold and hot converting unit temperature end, and for pressurization next time.Fluid media (medium) is by temperature control system Automatic-heating and insulation, to fixedly bulb or rotatable Universal-head are taked heat insulation and cooling provision.
described forcing press adopts single action press that mold clamping force is provided, and the workpiece of shaping special shape adopts double action press.
described reconfigurable die adjusts shape system to be connected with multiple spot mould, described multiple spot mould and described multiple spot mould adjust shape system to be arranged in housing, described housing is connected with forcing press, described multiple spot mould is connected and fixed bulb or rotatable Universal-head, described fixedly bulb or rotatable Universal-head are connected with flexible cushion, described flexible cushion is connected with sheet material, described sheet material is between upper blank holder and lower blank holder, upper and lower blank holder can be also flexible pressure-adjustable flange, also can adopt without flanging the limit mode of drawing, draw limit can adopt both sides to draw the mode of limit or four Bian Labian, described flexible cushion is between described fixedly bulb or rotatable Universal-head and described sheet material, fluid media (medium) heater system is connected with described fluid media (medium) chamber.
described element body is screw lift structure, by the rotation of screw mandrel, realizes feed screw nut's lifting, or element body is hydraulicefficiency elevation structure, by the mobile lifting that realizes piston of liquid.
described flexible cushion adopts macromolecule flexible material, can be the polymer composites such as polyurethane sheet or polyamide board or rubber slab, described flexible cushion can be also the low yield stress metal material of thin-walled or in macromolecule flexible material composition metal intermediate plate, according to Forming Workpiece profile feature and Forming Workpiece material, determine.
described fluid bulging system, is equipped with high-pressure fluid in described fluid media (medium) chamber, and described fluid media (medium) chamber adopts macromolecular material, according to Forming Workpiece profile feature and Forming Workpiece material, determines.
described reconfigurable die element body and described flexible blank holder end up and down are all provided with described fixedly bulb or rotatable Universal-head, described rotatable Universal-head be take described rotatable Universal-head top center point as centre of sphere rotation, in rotation process, the vertical coordinate of top center point does not change, described fixedly bulb or rotatable Universal-head are detachable, according to profile surface form, change, described fixedly bulb is macromolecular material or metal material, according to shaped sheet material and shape, determines.
described multiple spot mould control system adopts control system or the control system based on microprocessor or the control system based on PLC or the special-purpose kinetic control system based on PC.
Claims (9)
1. a normal temperature or hot fluid reconfigurable die bulging system, its composition comprises: with the forcing press of oil cylinder, it is characterized in that: described forcing press is contained on forcing press lower platform, described forcing press lower platform connects blank holder system, sheet material is through described blank holder system or plate stretch-forming equipment, described sheet material top has flexible cushion, described sheet material below has fluid media (medium) heater system, described flexible cushion connects reconfigurable die system, described reconfigurable die system Bonding pressure machine slide block.
2. normal temperature according to claim 1 or hot fluid reconfigurable die bulging system, it is characterized in that: described reconfigurable die system comprises reconfigurable die element body, described reconfigurable die element body connects rotatable Universal-head or fixing bulb, described rotatable Universal-head or described fixedly bulb connect described flexible cushion, described reconfigurable die element body connects reconfigurable die housing, reconfigurable die is housed in described reconfigurable die housing and adjusts shape system.
3. normal temperature according to claim 1 and 2 or hot fluid reconfigurable die bulging system, it is characterized in that: described fluid media (medium) heater system comprises the fluid media (medium) chamber with temperature thermocouple, in described fluid media (medium) chamber, liquid medium or hydraulic bag are housed, described fluid media (medium) chamber is all connected temperature control system with described temperature thermocouple, described fluid media (medium) chamber connection control system, described control system connects booster, described booster connects cold and hot converting unit, between described fluid media (medium) chamber and described cold and hot converting unit, high temperature check valve is housed, described high temperature check valve connects hot oil pump, described hot oil pump connects thermal medium preheating cabinet, described hydraulic bag has outer hoop part outward.
4. according to the normal temperature described in claim 1 or 2 or 3 or hot fluid reconfigurable die bulging system, it is characterized in that: described blank holder system comprises flexible blank holder system or fixing blank holder system, described flexible blank holder system comprises hydraulic cylinder under flexible blank holder, under described flexible blank holder, hydraulic cylinder connects lower flexible blank holder, described lower flexible blank holder top has upper flexible blank holder, described upper flexible blank holder connects hydraulic cylinder on flexible blank holder, and described sheet material is through between described upper flexible blank holder and described lower flexible blank holder.
5. normal temperature according to claim 1 and 2 or hot fluid reconfigurable die bulging system, is characterized in that: described forcing press is single-power forcing press or two single-power forcing press.
6. normal temperature according to claim 3 or hot fluid reconfigurable die bulging system, is characterized in that: described hydraulic bag connects drain pipe and feed tube, and described drain pipe is connected Hydraulic Station with described feed tube.
According to claim 1 or 2 or or normal temperature or hot fluid reconfigurable die bulging system described in 3 or 4, it is characterized in that: the end of the end of described reconfigurable die element body and described upper flexible blank holder, described lower flexible blank holder is all provided with fixedly bulb or rotatable Universal-head, described fixedly bulb or rotatable Universal-head connect described flexible cushion.
8. an expanding method for normal temperature or hot fluid reconfigurable die bulging system, is characterized in that: fluid pressure medium water or oil or gas, carry out preheating at thermal medium preheating cabinet; After temperature reaches normal temperature or hot requirement, by hot oil pump, the hot medium in thermal medium preheating cabinet is input in fluid pressure medium chamber, it is booster that the supercharging in fluid pressure medium chamber relies on high-voltage power supply; Due to the restriction of sealing original paper and high pressure servo valve, booster can not directly drive thermal medium, therefore between the hot medium in booster and hot media preheating case, sets up a cold and hot converting unit; Cold and hot converting unit one end connects booster, and the cold and hot converting unit other end connects thermal medium preheating cabinet and fluid pressure medium chamber; So isolated coming between thermal medium and booster, the action of booster still can be controlled by servo valve is accurate, is not subject to hot medium temperatures involved, and cold and hot converting unit can by the pressure 1:1 of booster be delivered in fluid pressure medium chamber; Temperature in fluid pressure medium chamber is by thermocouple measurement and feed back to temperature control system, and by temperature control system heating maintenance, treats machining sheet and be out of shape needed temperature; Before supercharging, under the effect of hot oil pump, the piston of cold and hot converting unit is pushed to low-temperature zone, and thermal medium is imported into the temperature end of cold and hot converting unit when being input to fluid pressure medium chamber; During supercharging, the high-pressure fluid of booster output enters the low-temperature end of cold and hot converting unit and will promote converting unit piston, and then the high-temperature high-pressure medium in cold and hot converting unit is promoted to fluid pressure medium chamber; Now, if booster backhaul, cold and hot converting unit temperature end pressure drop, hot oil pump can be pushed check valve open again, and thermal medium is added to cold and hot converting unit temperature end, and for pressurization next time; Fluid media (medium) is by temperature control system Automatic-heating and insulation, to fixedly bulb or rotatable Universal-head are taked heat insulation and cooling provision; By single action press, provide mold clamping force, the workpiece of shaping special shape adopts double action press.
9. the expanding method of normal temperature according to claim 8 or hot fluid reconfigurable die bulging system, it is characterized in that: upper blank holder and lower blank holder can be also flexible pressure-adjustable flanges, also can adopt without flanging and draw limit mode, La Bian can adopt both sides to draw the mode of limit or four Bian Labian; Reconfigurable die element body is screw lift structure, by the rotation of screw mandrel, realizes feed screw nut's lifting, or reconfigurable die element body is hydraulicefficiency elevation structure, by the mobile lifting that realizes piston of liquid; Flexible cushion adopts macromolecule flexible material, can be polyurethane sheet or polyamide board or rubber slab polymer composite, flexible cushion can be also the low yield stress metal material of thin-walled or in macromolecule flexible material composition metal intermediate plate, flexible cushion lower surface needs composite and flexible high temperature resistant heat insulation material; According to Forming Workpiece profile feature and Forming Workpiece material, determine; Fluid media (medium) is equipped with high-pressure fluid in chamber, and fluid media (medium) chamber adopts exotic material, according to Forming Workpiece profile feature and Forming Workpiece material, determines; Rotatable Universal-head be take rotatable Universal-head top center point as centre of sphere rotation, in rotation process, the vertical coordinate of top center point does not change, described fixedly bulb or rotatable Universal-head are detachable, according to profile surface form, change, described fixedly bulb is macromolecular material or metal material, according to shaped sheet material and shape, determines; Multiple spot mould control system adopts control system or the control system based on microprocessor or the control system based on PLC or the special-purpose kinetic control system based on PC; The temperature of normal temperature is room temperature, and hot temperature is 150-800 ℃.
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| CN112676459A (en) * | 2020-12-07 | 2021-04-20 | 北京卫星制造厂有限公司 | Ultralow-temperature flexible forming method for aluminum-lithium alloy complex thin-wall structural member |
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Application publication date: 20140326 |