CN103935049A - Laminated plate forming device and method based on electro-hydraulic forming - Google Patents

Laminated plate forming device and method based on electro-hydraulic forming Download PDF

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Publication number
CN103935049A
CN103935049A CN201410128254.1A CN201410128254A CN103935049A CN 103935049 A CN103935049 A CN 103935049A CN 201410128254 A CN201410128254 A CN 201410128254A CN 103935049 A CN103935049 A CN 103935049A
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glass fiber
fiber reinforced
aluminum alloy
graphite
thermoplastic glass
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CN201410128254.1A
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CN103935049B (en
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崔俊佳
孙光永
李光耀
单业奇
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Hunan University
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Hunan University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces

Abstract

The invention provides an electro-hydraulic forming device for a thermal-plastic glass fiber enhanced aluminum alloy laminated plate. The device comprises a power supply device, a mold and a fixed heating device, and is characterized in that the mold is a graphite female mold (2); an exhaust hole (15) is formed in the bottom of the graphite female mold (2), and a vacuum pump can be used for emptying gas in the graphite female mold (2); during forming, the graphite female mold (2) is positioned through a circular groove in a graphite base (4), and a hydraulic cylinder (14) applies pressure to the graphite female mold (2) so as to fix the graphite female mold (2). According to the forming device, by the full use of a high-rate forming characteristic of electro-hydraulic forming, interlamination shearing force in the forming process can be reduced, so that the interlamination cracking is reduced, and the transverse rigidity of a laminated plate can be improved; furthermore, due to the high-rate forming characteristic of the electro-hydraulic forming, the problem of large recurrent magnitude caused by preheating punching can be solved, and the shape and orientation precision higher than that by adopting punching forming is achieved.

Description

A kind of building mortion of the laminate based on electro-hydraulic forming and method
Technical field
The invention belongs to metal-base composites and shape field, be specifically related to a kind of building mortion and method of the hard board based on electro-hydraulic forming.
Background technology
Fibreglass-reinforced metal laminate (Fibre Reinforced Metal Laminates, FRML) is a kind of special metal-base composites, is to adopt adhesive bonding technique alternatively laminated to form by metal alloy thin plate and fiber/resin laying.Fibreglass-reinforced metal laminate has excellent combination property, and glass fibre strengthen aluminum alloy laminate be use at present more a kind of.The advantages such as the specific strength that its existing metal material is higher, specific stiffness and good plasticity, shock resistance, have retained again anti-fatigue performance and quality that fibre reinforced materials is good relatively light, meet following light-weighted developing direction.In addition, fibreglass-reinforced metal laminate also has good sound insulation and the ability of absorption of noise, for auto industry, can effectively reduce noise, improves the comfortableness of vehicle.Fiber glass thermoplastics (GMT) is to take thermoplastic resin as matrix, take glass mat as strengthening the composite of skeleton.Generally can produce sheet material semi-finished product, then directly be processed into the product of required shape.Thermoplasticity fiberglass plastic can be used as the enhancing base of metal laminate, and the more heat cured laminate of thermoplastic fibreglass-reinforced metal laminate (FML) (FML) has better shock-resistant characteristic, and the production cycle is shorter.
But because traditional forming technology is as laminating technology, forming process step is more, investment is large, and efficiency is low, is not suitable for batch production.So have scholar stamping technology to be introduced to the shaping of composite laminated plate, but also have some problems.During room temperature, fiber-reinforced layer plasticity is mostly poor, and the method for use punching press easily occurs the inefficacies such as brittle break when it is shaped, and causes processing difficulties; While improving temperature punching press, the resilience of plate again can be obvious.Therefore the fibreglass-reinforced metal laminate of superior performance, is only applied to the high-tech sectors such as Aero-Space and military project.
Electro-hydraulic forming is to utilize the mechanical effect that in liquid, strong current pulse electric discharge produces, a kind of high energy rate forming new technology that metal is processed.Because the high-energy-density characteristic of electro-hydraulic forming technology, during shaping, can show the superplasticity of explosive forming, can significantly improve the forming limit of metal, and shaped portion metal is stressed evenly, the difficult defect such as break.In addition, high strain rate characteristic can also make metal paste fast mould, and the springback capacity of metal is generally all smaller even without resilience.So use electro-hydraulic forming technology and thermoplastic fiberglass reinforced metal laminate formed and suitable preheating, can effectively improve the formability of fibreglass-reinforced metal laminate, solve the problem of brittle break in existing forming technique, and can effectively avoid resilience, improve the dimensional accuracy of sheet material while being shaped.With respect to the electro-magnetic forming that is both two-forty shaping, electro-hydraulic forming does not require the electric conductivity of rapidoprint, and the scope of application is wider.So, use electro-hydraulic forming method machining composite material laminate, can greatly shorten forming period, when being shaped, preheating avoids resilience, can improve the formability of fibreglass-reinforced metal laminate simultaneously, thereby it is more complicated to obtain shape, and the drip molding that quality is higher, can effectively promote the extensive use of this high performance material of fibreglass-reinforced metal laminate.
Summary of the invention
The forming technique that the object of this invention is to provide a kind of thermoplastic glass fiber reinforced metal laminate based on electro-hydraulic forming principle, and a kind of device of the shaping thermoplastic glass fiber reinforced metal laminate based on electro-hydraulic forming principle, for the design of thermoplastic glass fiber reinforced metal laminate board forming device provides new thinking.Can use electro-hydraulic forming to make thermoplastic glass fiber reinforced metal laminate paste rapidly mould by shaping dies provided by the present invention, to reach the object that thermoplastic glass fiber reinforced metal laminate is shaped.
To achieve these goals, the technical solution used in the present invention has been to provide a kind of thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device, comprises electric supply installation, mould, fixing heater, it is characterized in that:
Mould is graphite die, and the bottom of graphite die will have a steam vent, with the gas that uses vavuum pump to find time in graphite die; During shaping, graphite die positions by the circular groove on graphite base, and by hydraulic cylinder, graphite die is exerted pressure and is fixed;
Fixedly heater, comprises graphite base, resistive heater, top board, cooling water channel, cannelure, lower platen, set bolt, hydraulic cylinder; Graphite base is positioned in the circular groove of lower platen, respectively has four bolts hole in upper lower platen, uses four bolts to connect, and wherein the bottom of top board adopts the mode of welding to be connected with bolt; Hydraulic cylinder is used four and is bolted on top board;
In graphite base, have spiral cooling water channel, when cooling, use water pump to inject cooling water in cooling water channel, and can control cooldown rate by controlling the flow of water.
Further, electric supply installation comprises by high-tension transformer, the charge circuit that charging resistor and genotron form and by sparking electrode, main discharge gap, the discharge loop that discharging capacitor group and auxiliary gap form.
Further, during electric discharge, utilize high-tension transformer that alternating voltage is boosted, genotron is DC voltage by the ac voltage rectifier after raising, and discharging capacitor group is charged; During electric discharge, discharging capacitor group is discharged by main discharge gap and auxiliary gap, makes liquid gap breakdown and produce surge.
Further, when hydraulic cylinder is exerted pressure to graphite die, the reaction force making progress producing is born by four bolts that connect upper lower platen, also has cannelure on graphite base, and in cannelure, O type rubber seal is with the sealing property of assurance device.
What further, the liquid for preheating of graphite base the inside was used is methyl-silicone oil.
Further, this device also comprises the cooling system consisting of water pump, radiator, liquid temperature sensor, fluid reservoir, temperature controller.
The invention allows for a kind of manufacturing process that utilizes device of the present invention to be shaped to thermoplastic glass fiber reinforced aluminum alloy laminate, it is characterized in that:
Step 1, thermoplastic glass fiber reinforced aluminum alloy laminate to be processed are positioned, in the groove of graphite base, graphite die to be placed on thermoplastic glass fiber reinforced aluminum alloy laminate, and use hydraulic cylinder to apply suitable pressure to graphite die;
Step 2, see through steam vent, the gas of finding time in graphite die with vavuum pump;
Step 3, use resistive heater heat the methyl-silicone oil of graphite base the inside, complete the preheating to thermoplastic glass fiber reinforced aluminum alloy laminate;
Step 4, thermoplastic glass fiber reinforced aluminum alloy laminate is incubated;
Step 5, to the shaping of discharging of thermoplastic glass fiber reinforced aluminum alloy laminate;
The cooldown rate of step 6, control thermoplastic glass fiber reinforced aluminum alloy laminate, eliminates in cooling procedure due to the different residual thermal stresses that produce of layers of material shrinkage factor;
Step 7, complete cooling after, carry out local heat treatment to thermoplastic glass fiber reinforced aluminum alloy laminate.
Further, the free margins place of thermoplastic glass fiber reinforced aluminum alloy laminate is carried out to local heat, temperature is heated to 160 ℃, cooling gradually under 3MPa pressure subsequently, be controlled at 5min cool time.
Further, the thickness of described thermoplastic glass fiber reinforced aluminium alloy to be processed is 0.5~4mm.
Described technical scheme of the present invention has been compared following advantage with existing thermoplastic glass fiber reinforced aluminum alloy laminate forming technique:
1. the two-forty forming characteristic of electro-hydraulic forming, can reduce the shearing force of interlayer in forming process, thereby reduces the cracking of interlayer and can improve the lateral stiffness of laminate.
2. when the two-forty forming characteristic of electro-hydraulic forming can solve pre-drop stamping, the problem that springback capacity is large and have a higher accuracy of form and position than stamping.
3. in the process being shaped, to carry out preheating and apply the hydraulic shock power by eletrode tip discharge generation laminate, belong to dipping that secondary hot pressing can reinforcing glass compo layer glass fiber bundle and the bonding of interlayer, thereby the cutting performance of enhancement layer plywood, is improved the mechanical performance of laminate.
4. electro-hydraulic forming process does not comprise curing exotherm reaction, can greatly shorten the cycle of shaping, and production efficiency is improved greatly, is more applicable to producing in enormous quantities.
5. water-cooling system can be controlled the cooldown rate of preheated liquid exactly, fully to discharge the different residual thermal stresses that produce of shrinkage factor due to interlayer, to prevent the cracking of interlayer.
6. electro-hydraulic forming can effectively improve the forming limit of laminate, and the plate that shape is more complicated, precision is higher that can be shaped makes laminate have the scope of application more widely.
Accompanying drawing explanation:
Figure 1 shows that front view and the top view of thermoplastic glass fiber reinforced aluminum alloy laminate;
Figure 2 shows that the overall schematic of electro-hydraulic forming device;
Figure 3 shows that front view and the top view of top board;
Figure 4 shows that front view and the top view of lower platen;
Figure 5 shows that front view and the top view of graphite die;
Figure 6 shows that cutaway view and the top view of graphite base;
Wherein:
1--set bolt; 2--graphite die; 3--thermoplastic glass fiber reinforced aluminum alloy laminate;
4--graphite base; 5--resistive heater; 6--sparking electrode; 7--lower platen; 8--sparking electrode;
9--cooling water channel; 10--methyl-silicone oil; 11--cannelure; 12--top board; 13--set bolt;
14--hydraulic cylinder; 15--steam vent; 16--main discharge gap; 17--high-tension transformer; 18--charging resistor;
19--genotron; 20--discharging capacitor group; 21--auxiliary gap;
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme of the present invention is described further and is described.Obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the protection domain of this invention.
Thermoplastic glass fiber reinforced aluminum alloy laminate, when being shaped, has special requirement to forming technology.Temperature retention time during shaping, holding temperature, cooling velocity, mold materials etc., if select the defects such as the cracking of incorrect wrinkling, the interlayer that will cause laminate and fiber bending, affect the serviceability of laminate greatly.So, when the selection of mold materials, to consider a lot of influence factors.First be the thermal coefficient of expansion of mould, if the thermal coefficient of expansion of mould is excessive, will on the face contacting with laminate, produces larger compression stress, thereby affect the stress distribution on laminate thickness direction; Next is the thermal conductivity of mould, if thermal conductivity is smaller, when heating and cooling, can cause that the thermograde on laminate thickness direction differs greatly, and causes larger residual thermal stress; Finally, also will consider the coefficient of friction of mold materials, if the coefficient of friction of mold materials is excessive, excessive will being forced to of resistance being subject to during laminate expanded by heating produces contraction, also can cause larger residual thermal stress.So comprehensive above factor, finally selects thermal coefficient of expansion less, heat conductivility is better and have a graphite jig of better greasy property.For cooldown rate, also to control exactly, if cooldown rate can cause that the thermograde on the thickness direction of laminate is excessive too soon, cause the defects such as delamination and fibre deformation; Cooldown rate is too small can affect forming efficiency again.In addition, when heating, also to control temperature retention time and holding temperature.So in order to meet the requirement of different heating operating mode and to control exactly cooldown rate, this device is compared with conventional apparatus, has good temperature control performance.
As shown in Figure 1, the diameter of the thermoplastic glass fiber reinforced aluminum alloy laminate based on electro-hydraulic forming in the embodiment of the present invention is 30cm, and thickness is 2mm.Aluminium alloy layer plate material is wherein 2024-T3, and thickness is about 0.5mm; The matrix of fiberglass reinforced plastics is thermoplastic resin polypropylene, and the thickness of adhesive layer and fiberglass reinforced plastics layer is about 0.2mm.
As shown in Figure 2, thermoplastic glass fiber reinforced aramid aluminiumlaminates electro-hydraulic forming device of the present invention comprises electric supply installation, mould, fixedly heater and cooling system.
As shown in the circuit diagram part of Fig. 2, electric supply installation comprises by high-tension transformer 17, the charge circuit that charging resistor 18 and genotron 19 forms and by sparking electrode 6,8, main discharge gap 15, the discharge loop that discharging capacitor group 20 and auxiliary gap 21 form.During electric discharge, high-tension transformer 17 rises to 3KV by the industrial alternating voltage of 380V, genotron 19 is DC voltage by the ac voltage rectifier after raising, discharging capacitor group 20 is charged, when discharging capacitor group 20 voltages rise to after threshold values, light auxiliary gap 21, discharging capacitor group is just by main discharge gap 16 and auxiliary gap 21 electric discharges, make liquid gap breakdown, large electric current passes through discharging gap within the extremely short time.Effect of inertia (liquid is almost incompressible) due to discharge channel surrounding liquid, pressure rises to peak value and produces shock wave and to surrounding, spread rapidly in liquid medium within the extremely short time, shock wave, to workpiece, will make thermoplastic glass fiber reinforced aluminum alloy laminate 3 be shaped.
Especially, the die material that this building mortion uses is graphite, the graphite die 2 that the present embodiment is used is hat moulds, and because vacuum has a great impact the quality of electro-hydraulic forming, so will have a steam vent 15 in the bottom of graphite die 2, with the gas that uses vavuum pump to find time in graphite die 2.During shaping, graphite die 2 positions by the circular groove on graphite base 4, and is exerted pressure and be fixed by 14 pairs of graphite dies 2 of hydraulic cylinder.Meanwhile, graphite die 2 can produce suitable pressure-pad-force to thermoplasticity glass fiber reinforced plastics laminates 3, to guarantee carrying out smoothly of forming process.
Fixedly heater comprises set bolt 1,13, graphite die 2, thermoplastic glass fiber reinforced aluminum alloy laminate 3, graphite base 4, resistive heater 5, lower platen 7, cooling water channel 9, methyl-silicone oil 10, cannelure 11, top board 12, set bolt 13, hydraulic cylinder 14 compositions such as grade.Concrete, graphite base 4 is positioned in the circular groove of lower platen 7, for guaranteeing that bonding strength can be coated with one deck adhesive in groove, be also convenient to later dismounting; In upper lower platen, respectively have four bolts hole, use four bolts to connect, wherein the bottom of top board 12 adopts the mode of welding to be connected with bolt 1,13; Hydraulic cylinder 14 is used four and is bolted on top board 12, the main diagram of top board 12 and top view are as shown in Figure 3, when graphite die 2 is exerted pressure, the reaction force making progress producing is born by four bolts that connect upper lower platen, the downward active force bearing due to top board 12 is very little, only have the deadweight of hydraulic cylinder 14 and upper plate 12, so top board 12 adopts the mode of welding to be connected with 1,13, bolt, be enough to guarantee bonding strength.Especially, on graphite base 4, also have cannelure 11, in cannelure 11, pack O type rubber seal into, to guarantee the sealing property of whole device.In addition, in order to meet the preheating that thermoplasticity glass fibre is increased to aluminum alloy laminate 3, what the liquid for preheating of graphite base 4 the insides was used is methyl-silicone oil 10, its Heat stability is good, evaporation loss little (150 ℃, 30 days, evaporation loss is only 2%), so can not bring the pressure producing due to steam during heating, and there is no toxicity, be the ideal liquid of preheating thermoplastic glass fiber reinforced aluminum alloy laminate 3.Because methyl-silicone oil 10 has certain thermal expansivity when heating, so when filling liquid in graphite base 4, do not fill completely, be reserved with for the expansion of methyl-silicone oil 10 certain space.Because graphite has electric conductivity, think the safety that guarantees operating personnel, paste a layer insulating at the outer surface of graphite die 2 and graphite base 4.
Cooling system comprises water pump, radiator, liquid temperature sensor, fluid reservoir, temperature controller etc., but does not show in the overall schematic of electro-hydraulic forming device.In the graphite base 4 of mentioning, have spiral cooling water channel 9 in the above, as shown in Figure 6, when cooling, use water pump toward the interior injection cooling water of cooling water channel 9, and can control cooldown rate by controlling the flow of water, from the cooling water having heated up of graphite base 4 interior outflows, by radiator, lower the temperature, then flow back to fluid reservoir and form closed circuit.Especially, the graphite jig 2 using due to this device has the thermal conductivity having very much, so can compare the temperature of the interior preheated liquid methyl-silicone oil 10 of control graphite base 4 of precise and high efficiency.
While using this device to form thermoplastic glass fiber reinforced aluminum alloy laminate 3, it is characterized in that wrapping following steps:
(1) thermoplastic glass fiber reinforced aluminum alloy laminate 3 is positioned and fixed.Thermoplastic glass fiber reinforced aluminum alloy laminate 3 to be processed is positioned in the groove of graphite base 4, then graphite die 2 is placed in thermoplastic glass fiber reinforced aluminum alloy laminate 3 above, and use 14 pairs of graphite dies 2 of hydraulic cylinder to apply suitable pressure, so that thermoplastic glass fiber reinforced aluminum alloy laminate 3 is produced to 3MPa pressure-pad-force;
(2) with vavuum pump, graphite die 2 is carried out to evacuation.See through steam vent 15, the gas of finding time in graphite die 2 with vavuum pump, to guarantee the forming quality of electro-hydraulic forming.If there is air not discharge in time in graphite die 2, can hinders the shaping of thermoplastic glass fiber reinforced aluminum alloy laminate 3, and probably in the bottom of thermoplastic glass fiber reinforced aluminum alloy laminate 3, produce the defects such as pit.
(3) thermoplastic glass fiber reinforced aluminum alloy laminate 3 is carried out to preheating.Energising, resistive heater 5 can heat the methyl-silicone oil 10 of graphite base 4 the insides, makes fluid temperature be stabilized in 160 ℃, to complete the preheating to thermoplastic glass fiber reinforced aluminum alloy laminate 3.
(4) thermoplastic glass fiber reinforced aluminum alloy laminate 3 is incubated.Allow thermoplastic glass fiber reinforced aluminum alloy laminate 3 be incubated 5min in being heated to the methyl-silicone oil 10 of 160 ℃, so that the evenly preheating of laminate each several part.Forming quality in the time of can guaranteeing post forming like this, prevents the generation of the defects such as delamination, inner brittle fracture.
(5) to thermoplastic glass fiber reinforced aluminum alloy laminate 3 shaping of discharging.Power turn-on, by high-tension transformer 17, the voltage of the AC power of 380V is risen to 3KV, then after charging resistor 18 and genotron 19 rectifications, to discharging capacitor group 20, charge, at this moment, discharging capacitor group 20 starts store electrical energy, when the voltage of discharging capacitor group 20 rises to after threshold values, can light auxiliary gap 21, discharging capacitor group 20 is just by main discharge gap 16 and auxiliary gap 21 electric discharges, effect of inertia (liquid is almost incompressible) due to discharge channel surrounding liquid, thereby pressure rises to peak value and produces shock wave and to surrounding, spread rapidly in liquid medium within the extremely short time, shock wave is to workpiece, just impel thermoplastic glass fiber reinforced aluminum alloy laminate 3 to be shaped.
(6) control of cooldown rate.Thermoplastic glass fiber reinforced aluminum alloy laminate 3 is completed after electric discharge, must control the cooldown rate of thermoplastic glass fiber reinforced aluminum alloy laminate, to eliminate in cooling procedure due to the different residual thermal stresses that produce of layers of material shrinkage factor, the cracking between preventing layer.Concrete grammar is, uses liquid temperature sensor to obtain the temperature signal of the methyl-silicone oil 10 in graphite base 4, is then transferred to temperature controller, and temperature controller can be by regulating the flow of cooling water control cooldown rate after obtaining temperature signal.In the present embodiment, be by controlling the flow of cooling water, allow methyl-silicone oil 10 cool to room temperature uniformly in 10min.
(7) complete cooling after, carry out local heat treatment to thermoplastic glass fiber reinforced aluminum alloy laminate 3.Because there is free edge effect on the formula that the sections side of laminate, think the serviceability that improves thermoplastic glass fiber reinforced aluminum alloy laminate 3, carry out local heat treatment to it.Concrete grammar is, the free margins place of thermoplastic glass fiber reinforced aluminum alloy laminate 3 is carried out to local heat, and temperature is heated to 160 ℃, cooling gradually under 3MPa pressure subsequently, be controlled at 5min cool time, sticky to prevent opening of interlayer, improve serviceability.
The discharge voltage adopting in the present embodiment is 3KV, and optimal discharge voltage can change with the difference of the thickness of thermoplastic glass fiber reinforced laminate 3 to be processed, and occurrence need to finally be determined by test.
The graphite die 2 adopting in the present embodiment is hat die, if need the drip molding of other shapes, only needs to adopt the die of respective shapes, but it should be noted that and before shaping, need to use vavuum pump that the air in annular seal space is taken out, to guarantee forming quality.
The forming technique of a kind of thermoplastic glass fiber reinforced aluminum alloy laminate based on electro-hydraulic forming principle provided by the present invention is a kind of new laminate manufacturing process.From embodiment, can find out, use electro-hydraulic forming method machining composite material laminate, can greatly shorten forming period; When preheating improves formability, can effectively avoid resilience, can improve the formability of laminate again, contribute to obtain shape more complicated, the drip molding that quality is higher simultaneously.

Claims (9)

1. a thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device, comprises electric supply installation, mould, fixing heater, it is characterized in that:
Mould is graphite die (2), and the bottom of graphite die (2) will have a steam vent (15), with the gas that uses vavuum pump to find time in graphite die (2); During shaping, graphite die (2) positions by the circular groove on graphite base (4), and by hydraulic cylinder (14), graphite die (2) is exerted pressure and is fixed;
Fixedly heater, comprises graphite base (4), resistive heater (5), lower platen (7), cooling water channel (9), cannelure (11), top board (12), set bolt (13), hydraulic cylinder (14); Graphite base (4) is positioned in the circular groove of lower platen (7), respectively has four bolts hole in upper lower platen, uses four bolts to connect, and wherein the bottom of top board (12) adopts the mode of welding to be connected with bolt (1,13); Hydraulic cylinder (14) is used four and is bolted on top board (12);
In graphite base (4), have spiral cooling water channel (9), when cooling, use water pump to inject cooling water in cooling water channel (9), and can control cooldown rate by controlling the flow of water.
2. thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device according to claim 1, it is characterized in that: electric supply installation comprises by high-tension transformer (17), the charge circuit that charging resistor (18) and genotron (19) form and by sparking electrode (6,8), main discharge gap (16), the discharge loop that discharging capacitor group (20) and auxiliary gap (21) form.
3. thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device according to claim 2, it is characterized in that: during electric discharge, utilize high-tension transformer (17) that alternating voltage is boosted, genotron (19) is DC voltage by the voltage commutation after raising, and discharging capacitor group (20) is charged; During electric discharge, discharging capacitor group is discharged by main discharge gap (16) and auxiliary gap (21), makes liquid gap breakdown and produce surge.
4. thermoplastic glass fiber reinforced aramid aluminiumlaminates electro-hydraulic forming device according to claim 1, it is characterized in that: when graphite die (2) is exerted pressure, the reaction force making progress producing is born by four bolts that connect upper lower platen, on graphite base (4), also have cannelure (11), O type rubber seal will be packed in cannelure (11) into, with the sealing property of assurance device.
5. thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device according to claim 1, is characterized in that: what the liquid for preheating of graphite base (4) the inside was used is methyl-silicone oil (10).
6. thermoplastic glass fiber reinforced aluminum alloy laminate electro-hydraulic forming device according to claim 1, is characterized in that: this device also comprises the cooling system consisting of water pump, radiator, liquid temperature sensor, fluid reservoir, temperature controller.
7. utilize the manufacturing process of device to thermoplastic glass fiber reinforced aluminum alloy laminate (3) described in claim 1, it is characterized in that:
Step 1, thermoplastic glass fiber reinforced aluminum alloy laminate (3) to be processed are positioned in the groove of graphite base (4), graphite die (2) is placed on thermoplastic glass fiber reinforced aluminum alloy laminate (3), and uses hydraulic cylinder (14) to apply suitable pressure to graphite die (2);
Step 2, see through steam vent (15), the gas of finding time in graphite die (2) with vavuum pump;
Step 3, use resistive heater (5) heat the methyl-silicone oil (10) of graphite base (4) the inside, complete the preheating to thermoplastic glass fiber reinforced aluminum alloy laminate (3);
Step 4, thermoplastic glass fiber reinforced aluminum alloy laminate (3) is incubated;
Step 5, to thermoplastic glass fiber reinforced aluminum alloy laminate (3) shaping of discharging;
The cooldown rate of step 6, control thermoplastic glass fiber reinforced aluminum alloy laminate, eliminates in cooling procedure due to the different residual thermal stresses that produce of layers of material shrinkage factor;
Step 7, complete cooling after, carry out local heat treatment to thermoplastic glass fiber reinforced aluminum alloy laminate (3).
8. manufacturing process according to claim 7, is characterized in that, in step 7, to carry out local heat to the free margins place of thermoplastic glass fiber reinforced aluminum alloy laminate (3), temperature is heated to 160 ℃, cooling gradually under 3MPa pressure subsequently, be controlled at 5min cool time.
9. manufacturing process according to claim 7, is characterized in that, the thickness of described thermoplastic glass fiber reinforced aluminium alloy to be processed is 0.5~4mm.
CN201410128254.1A 2014-04-01 2014-04-01 A kind of building mortion of the laminate based on electro-hydraulic forming and method Expired - Fee Related CN103935049B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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CN106694679A (en) * 2016-12-29 2017-05-24 海宁红狮机电技术开发有限公司 Sheet forming device
CN106734499A (en) * 2016-12-01 2017-05-31 湘潭大学 Sheet material warms electro-hydraulic high speed impact quasistatic hydraulic pressure compound molding device and the sheet material forming method realized using the device
CN106893955A (en) * 2017-03-20 2017-06-27 武汉理工大学 A kind of electromagnetic forming device and the method that fiber-reinforced metal matrix composite is prepared using the device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101574717A (en) * 2008-05-05 2009-11-11 福特全球技术公司 Electrohydraulic forming method for formed sheet metal blank
CN202398691U (en) * 2010-10-29 2012-08-29 福特环球技术公司 Gap discharge electro-hydraulic forming (EHF) device for forming parts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101574717A (en) * 2008-05-05 2009-11-11 福特全球技术公司 Electrohydraulic forming method for formed sheet metal blank
CN202398691U (en) * 2010-10-29 2012-08-29 福特环球技术公司 Gap discharge electro-hydraulic forming (EHF) device for forming parts

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734499A (en) * 2016-12-01 2017-05-31 湘潭大学 Sheet material warms electro-hydraulic high speed impact quasistatic hydraulic pressure compound molding device and the sheet material forming method realized using the device
CN106734499B (en) * 2016-12-01 2018-04-20 湘潭大学 Plate warms the quasi-static hydraulic pressure compound molding device of electro-hydraulic high speed impact and the sheet material forming method realized using the device
CN106694679A (en) * 2016-12-29 2017-05-24 海宁红狮机电技术开发有限公司 Sheet forming device
CN106893955A (en) * 2017-03-20 2017-06-27 武汉理工大学 A kind of electromagnetic forming device and the method that fiber-reinforced metal matrix composite is prepared using the device
CN106893955B (en) * 2017-03-20 2019-01-22 武汉理工大学 A kind of electromagnetic forming device and the method for preparing fiber-reinforced metal matrix composite using the device

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