CN103861932A - Forming device and method of thermoplasticity glass fiber reinforcement aluminum alloy laminate plate - Google Patents

Forming device and method of thermoplasticity glass fiber reinforcement aluminum alloy laminate plate Download PDF

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Publication number
CN103861932A
CN103861932A CN201410128520.0A CN201410128520A CN103861932A CN 103861932 A CN103861932 A CN 103861932A CN 201410128520 A CN201410128520 A CN 201410128520A CN 103861932 A CN103861932 A CN 103861932A
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glass fiber
fiber reinforced
thermoplastic glass
aramid aluminiumlaminates
reinforced aramid
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CN103861932B (en
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孙光永
崔俊佳
李光耀
单业奇
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Hunan University
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Hunan University
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Abstract

The invention discloses a forming device and method of a thermoplasticity glass fiber reinforcement aluminum alloy laminate plate. The device comprises a sealing side pressing ring (1), a discharging coil (3), a coil frame (4), bolts (5 and 11), a lower pressing plate (6), a base (7), a resistance wire (9), an upper pressing plate (10) and a hydraulic cylinder (12). The bolts (5 and 11) and the bottom of the upper pressing plate (10) are connected in a welding mode. The hydraulic cylinder (12) is fixed on the upper pressing plate (10). A working arm of the hydraulic cylinder (12) penetrates through a center hole of the upper pressing plate (10) and extends downwards. The lower end of the working arm of the hydraulic cylinder (12) is fixedly connected with the sealing side pressing ring (1). A stroke limiting block (13) is welded to the working arm. An exhaust hole (8) is formed in the side wall of the sealing side pressing ring (1). The device can preheat the laminate plate and control the cooling speed during cooling of the laminate plate, accordingly, residual heat stress caused by different contraction rates of plate pieces is released, and cracking between layers is avoided.

Description

A kind of building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates and method
Technical field
The invention belongs to metal-base composites machine-shaping field, be specifically related to a kind of manufacturing process of thermoplastic glass fiber reinforced aramid aluminiumlaminates.
Background technology
Fibreglass-reinforced metal laminate (Fibre Reinforced Metal Laminates, FRML) is a kind of special metal-base composites, adopts adhesive bonding technique alternatively laminated to form by metal alloy thin plate and fiber/resin laying.Fibre laminates have excellent combination property, and glass fibre enhancing aramid aluminiumlaminates is to use at present more one.The advantages such as specific strength that its existing metal material is higher, specific stiffness and good plasticity, fracture property, shock resistance, retained again the good fatigue performance of fibre reinforced materials, and quality are 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, can effectively reduce noise for auto industry, improves comfortableness.Glass-fiber reinforced thermoplastic (GMT) material is taking thermoplastic resin as matrix, taking glass mat as strengthening the composite of skeleton.Generally can produce sheet material semi-finished product, then directly be processed into the product of needed shape.Thermoplasticity fiberglass plastic can be used as the enhancing base of plymetal, and the more heat cured laminate of thermoplastic fibreglass-reinforced metal laminate (FML) (FML) has better impact characteristics.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, but also have some problems.When 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 sector such as Aero-Space and military project.
Electro-magnetic forming is to utilize magnetic field force to make the two-forty forming technique of metal stock distortion.Because the high-energy-density characteristic of electromagnetic forming technique, while making workpiece deformation, show the superplasticity of explosive forming.Therefore, it can significantly improve the forming limit of metal, and shaped portion metal is stressed evenly, the difficult forming defects such as break.High strain rate characteristic can make metal paste fast mould, and the springback capacity of metal is generally all smaller even without resilience.So use electromagnetic forming technique and thermoplastic fiberglass reinforced metal laminate formed and suitable preheating, can effectively improve fibreglass-reinforced metal laminate forming property, solve the problem of brittle break in existing forming technique, and can effectively avoid resilience, improve the dimensional accuracy of sheet material forming.This manufacturing process can also easily complete the operations such as circular hole flange and special-shaped hole flanging, effectively raises the assembly performance of material.Although having solved resilience problem when thin plate plate is shaped, the manufacturing process that is a kind of titanium alloy thin wall housing of 201310355871.0 as application for a patent for invention number do not have heater can not plate be carried out preheating and is not suitable for the processing of thermoplastic glass fiber reinforced aramid aluminiumlaminates; As the application for a patent for invention number magnesium alloy plate mild hot formation method that is 200910062979.4 can improve the formability of material but the efficiency of heating surface is low and not evenly can not control the speed when cooling, so can cause the cracking of manufacturing deficiency and interlayer in the time that processing thermoplastic glass fibre strengthens aramid aluminiumlaminates.
Summary of the invention
The object of the invention is, the deficiency existing for prior art, for the shaping of thermoplastic glass fiber reinforced aramid aluminiumlaminates provides a kind of building mortion and method of thermoplastic glass fiber reinforced aramid aluminiumlaminates.
Technical scheme of the present invention is to provide a kind of building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates, it is characterized in that: comprise sealing pressing flange, discharge coil, coil rack, bolt, lower platen, base, resistance wire, top board, hydraulic cylinder, wherein, the bottom of bolt and top board adopts the mode of welding to be connected, hydraulic cylinder uses bolt to be connected and fixed on top board, the working arm of hydraulic cylinder passes the centre bore of top board to downward-extension, and working arm lower end and the sealing pressing flange of hydraulic cylinder are connected, and on working arm, are welded with stroke limit piece; On the sidewall of sealing pressing flange, have steam vent;
Base is fixed in the circular groove of lower platen, for ensureing that bonding strength can be coated with one deck adhesive in groove, is also convenient to later dismounting; The depth of groove of described sealing pressing flange is greater than the distortion thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates, thereby plays the double action of heated sealed and flanging;
After thermoplastic glass fiber reinforced aramid aluminiumlaminates location, opening power, utilizes resistance wire to heat thermoplastic glass fiber reinforced aramid aluminiumlaminates, until temperature stabilization is at preset temperature;
Storage capacitor to building mortion charges, and when the voltage of storage capacitor reaches after shaping voltage, discharge coil is discharged, and thermoplastic glass fiber reinforced aramid aluminiumlaminates deforms under the effect of discharge coil generation electromagnetic force.
Further, the present invention also provides a kind of method of utilizing the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates to carry out material forming, it is characterized in that:
Step 1, thermoplastic glass fiber reinforced aramid aluminiumlaminates is fixed on base, then sealing pressing flange is placed in the groove of base, and sealing pressing flange is applied to suitable pressure with hydraulic cylinder, so that thermoplastic glass fiber reinforced aramid aluminiumlaminates is produced to suitable pressure-pad-force;
Step 2, by the resistance wire energising in sealing pressing flange, thermoplastic glass fiber reinforced aramid aluminiumlaminates is carried out to homogeneous heating;
Step 3, thermoplastic glass fiber reinforced aramid aluminiumlaminates is carried out to the insulation of Preset Time and temperature, after being heated to preset temperature, thermoplastic glass fiber reinforced aramid aluminiumlaminates is carried out to the insulation of certain hour, so that each several part homogeneous heating;
Step 4, the storage capacitor of electro-magnetic forming equipment is charged, when charging voltage reaches after the shaping voltage 2-15Kv of setting, disconnect charge circuit;
Step 5, closed electromagnetic shaping discharge loop, storage capacitor discharges to electro-magnetic forming coil, and thermoplastic glass fiber reinforced aramid aluminiumlaminates deforms rapidly under the effect of electromagnetic force;
Step 6, complete after distortion at thermoplastic glass fiber reinforced aramid aluminiumlaminates, control cooldown rate to eliminate in cooling procedure, due to the different residual thermal stresses that produce of layers of material shrinkage factor;
Step 7, after cooling procedure completes, free margins place is carried out to local heat, cooling under sufficiently high pressure subsequently, opening between preventing layer is sticky.
Further, in step 1, by the effect of upper lower platen, thermoplastic glass fiber reinforced aramid aluminiumlaminates to be formed is pressed against on electro-magnetic forming coil, and ensure that discharge coil and coil rack thereof are fixed well.
Further, in step 2, described sealing pressing flange side is provided with two steam vents, to guarantee that the gas in sealing pressing flange can discharge, and in cooling procedure with extraneous heat exchange.
Further, in step 2, use thermocouple to survey the intensification temperature of described thermoplastic glass fiber reinforced aramid aluminiumlaminates, and make temperature stabilization in preset range.
Further, in step 5, described electro-magnetic forming coil and coil rack are solidified togather through insulating resin, and have good insulating properties with thermoplastic glass fiber reinforced aramid aluminiumlaminates.
Further, the thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates is 0.7~4mm.
This technology has following advantage compared with existing thermoplastic glass fiber reinforced aramid aluminiumlaminates forming technique:
Electro-magnetic forming two-forty forming characteristic, can reduce the shearing force of interlayer in forming process, thereby reduce the cracking of interlayer and can improve the lateral stiffness of laminate.
2. when the two-forty forming characteristic of electro-magnetic 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, need laminate heat and apply electromagnetic pressure, belong to dipping that secondary hot pressing can reinforcing glass compo layer glass fiber bundle and the bonding of interlayer, thereby the cutting performance that strengthens laminate, is improved the mechanical performance of laminate.
4. in electro-magnetic forming process, do not comprise curing exotherm reaction, can greatly shorten the cycle of shaping, production efficiency is improved greatly, be more applicable to producing in enormous quantities.
5. sealing pressing flange be except can carry out preheating to laminate, can also control the cooldown rate of laminate when cooling, thereby fully discharge due to the different residual thermal stresses that produce of plate interlayer shrinkage factor, to prevent the cracking of interlayer.
6. electro-hydraulic forming can effectively improve the forming limit of laminate, thereby the plate that the shape that is shaped is more complicated, precision is higher makes laminate have the scope of application more widely.
Brief description of the drawings
Figure 1 shows that the overall schematic of electromagnetic forming device
Figure 2 shows that front view and the top view of top board;
Figure 3 shows that front view and the top view of lower platen;
Figure 4 shows that front view and the top view of sealing pressing flange;
Figure 5 shows that front view and the top view of base;
Figure 6 shows that front view and the top view of outer course groove;
Figure 7 shows that front view and the top view of thermoplastic glass fiber reinforced aramid aluminiumlaminates in embodiment 1;
Figure 8 shows that front view and the top view of thermoplastic glass fiber reinforced aramid aluminiumlaminates in embodiment 2;
Figure 9 shows that the overall schematic of the flanging forming device of embodiment 2;
Figure 10 shows that the flanging die of embodiment 2;
Figure 11 shows that the cutaway view after embodiment 2 thermoplastic glass fiber reinforced aramid aluminiumlaminates flange.
Wherein:
Accompanying drawing 1 description of symbols:
1--sealing pressing flange; 2--thermoplastic glass fiber reinforced aramid aluminiumlaminates; 3--discharge coil;
4--coil rack; 5,11--bolt; 6--lower platen; 7--base; 8--steam vent; 9 resistance wires;
10--top board; 12 hydraulic cylinders; 13 stroke limit pieces;
Accompanying drawing 9 description of symbols:
1--sealing pressing flange; 2--thermoplastic glass fiber reinforced aramid aluminiumlaminates; 3--discharge coil;
4--coil rack; 5,11--bolt; 6--lower platen; 7--base; 8--steam vent; 9 resistance wires;
10--top board; 12 hydraulic cylinders; 13 stroke limit pieces; 14 flanging dies.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is elaborated.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the protection domain of this invention.
Research finds, compared with traditional electromagnetic forming technique, when processing thermoplastic glass fibre strengthens aramid aluminiumlaminates, technological parameter is had to special requirement.For example, add the time of man-hour insulation, the temperature of insulation, cooling velocity, if the parameter of mould etc. are selected the defect such as cracking and fiber bending of incorrect wrinkling, the interlayer that will cause laminate, affects the serviceability of laminate.So, in the time of the selection of mold materials, to consider a lot of influence factors.First be the thermal coefficient of expansion of mould, if thereby the thermal coefficient of expansion of mould is excessive will affect the stress distribution on laminate thickness direction with the larger compression stress of contact-making surface generation of laminate; Next is the thermal conductivity of mould, and thermal conductivity is less can cause that in the time of heating and cooling the thermograde on laminate thickness direction differs greatly, and causes large residual thermal stress; Finally, also to consider the impact of the coefficient of friction of mould, if the resistance being subject to when the excessive laminate expanded by heating of the coefficient of friction of mould will be forced to more greatly shrink, thereby produce larger residual stress.So finally select thermal coefficient of expansion less, thermal conductivity better and have a graphite jig of better lubrication.For cooldown rate, cooldown rate thickness too fast and laminate can cause the excessive defect such as delamination and distortion that causes of thermograde on thickness direction when larger; The too little efficiency that can affect again production of temperature.And also to control temperature retention time and holding temperature in when heating.So this device has good temperature control performance, can meet the needs of different temperatures control.
As shown in Figure 1, the building mortion of a kind of thermoplastic glass fiber reinforced aramid aluminiumlaminates of the present invention, comprise rectifier, electric capacity, current-limiting resistance, discharge coil, switch, sealing pressing flange and sealing pressing flange fixture etc., wherein the resistance wire of resistance heated case be fixed on thermoplastic glass fiber reinforced aramid aluminiumlaminates directly over, improve the efficiency of heating surface and also make heating more even.This device can be controlled heating-up temperature and chilling temperature accurately with maximum not being both of other devices.Because thermoplastic glass fiber reinforced aramid aluminiumlaminates must carry out preheating and must control the speed when cooling for the cracking between preventing layer before shaping.
In the embodiment of the present invention, the diameter of thermoplastic glass fiber reinforced aramid aluminiumlaminates used 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 1, in the first embodiment, the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates, comprises graphite grazing blank holder 1, discharge coil 3, coil rack 4, bolt 5,11, lower platen 6, graphite base 7, resistance wire 9, top board 10, hydraulic cylinder 12 etc.Wherein, the bottom of bolt 5,11 and top board 10 adopts the mode of welding to be connected, hydraulic cylinder 12 is fixed on top board 10, the working arm of hydraulic cylinder 12 is through the centre bore of top board 10, the working arm lower end of hydraulic cylinder 12 adopts and is threaded with sealing pressing flange 1, and on working arm, is welded with stroke limit piece 13, to ensure the relative position of sealing pressing flange 1 and top board 10, in the time acting on effectively on sealing pressing flange, the reaction force of generation is born by four bolts fixing upper lower platen;
Graphite base 7 is fixed in the circular groove of lower platen 6, for ensureing that bonding strength can be coated with one deck adhesive in groove, is also convenient to later dismounting.The depth of groove of described sealing pressing flange 1 is much larger than the possible distortion thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, thereby plays the double action of heated sealed and flanging.
In addition, have steam vent 8 on the sidewall of sealing pressing flange 1, this steam vent 8, to prevent that the air pressure in die cavity is too high in the process of Quick-forming, produces inhibition to being shaped; In the time of cooling, can come to carry out heat exchange to control chilling temperature with the external world by it.
As shown in Figure 1, base 7 is positioned in the circular groove on lower platen 6, the thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 that is 2mm by thickness is positioned in the detent of base 7, then sealing pressing flange 1 is placed on thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, and use hydraulic cylinder 12 to apply suitable pressure to sealing pressing flange 1, so that sealing pressing flange 1 produces the pressure-pad-force of 3MPa to thermoplastic glass fiber reinforced aramid aluminiumlaminates 2.
After completing the fixing and location of thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, opening power, utilize resistance wire 9 to heat thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, until temperature stabilization is 160 DEG C of left and right, there are some researches show at glass fiber reinforced polypropylene plastics and have reasonable bating effect at this temperature lower plywood, shearing strength between layers can be obviously less, greatly improves formability.Be heated to after 160 DEG C, also will at this temperature, be incubated 10min so that thermoplastic glass fiber reinforced aramid aluminiumlaminates homogeneous heating.Meanwhile, storage capacitor to electro-magnetic forming equipment charges, when charging voltage reaches after shaping voltage 2KV, discharge coil 3 is discharged, under the effect of the electromagnetic force that thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 produces at discharge coil 3, deform fast.
After distortion, do not remove immediately sealing pressing flange 1, use suitably heating and make temperature in sealing pressing flange cool to room temperature at the uniform velocity in 5min by steam vent and extraneous method of carrying out heat exchange of resistance wire, to discharge the residual thermal stress in cooling procedure, prevent the cracking of thermoplastic glass fiber reinforced aramid aluminiumlaminates interlayer.In the time that being reduced to room temperature, the temperature in sealing pressing flange 1 just completes the bulging to thermoplastic glass fiber reinforced aramid aluminiumlaminates.Subsequently thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 is carried out to the processing of localized heat.Concrete grammar is: the free margins place to thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 carries out local heat to 160 degree Celsius, cooling under the pressure of 3Mpa subsequently, and be 2min cool time, sticky to prevent opening of interlayer.
The second embodiment of the present invention is that thermoplastic glass fiber reinforced aramid aluminiumlaminates is carried out to flanging forming.
In the present embodiment, thermoplastic glass fiber reinforced aramid aluminiumlaminates used, aluminium alloy layer plate material is 2024-T3, diameter is 30cm, thickness is 2mm, the matrix that has diameter at the center of laminate and be its fiberglass plastic of circular hole of 8cm is thermoplastic polypropylene, and the thickness of aluminium alloy layer is about 0.5mm, and adhesive layer and glass fiber reinforced layer thickness are about 0.2mm.
As shown in Figure 9, electromagnetic forming device used in the present embodiment is by sealing pressing flange 1, discharge coil 3, coil rack 4, bolt 5,11, lower platen 6, base 7, resistance wire 9, top board 10, hydraulic cylinder 12, stroke limit piece 13, flanging die 14 etc.
In addition, in the present embodiment, the shape of thermoplastic glass fiber reinforced aramid aluminiumlaminates used as shown in Figure 8, base 7 is positioned in the circular groove on lower platen 6, for ensureing that bonding strength can be coated with one deck adhesive, the thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 that is 2mm by thickness is positioned in the detent of base 7, then sealing pressing flange 1 is placed on thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, and use hydraulic cylinder 12 to apply suitable pressure to sealing pressing flange 1 to make sealing pressing flange 1 produce the pressure-pad-force of 3MPa to thermoplastic glass fiber reinforced aramid aluminiumlaminates 2.After completing the fixing and location of thermoplastic glass fiber reinforced aramid aluminiumlaminates 2, opening power, utilize resistance wire 9 to see through the medium pore turning over all over mould 13 thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 is carried out to local heat, until the temperature stabilization in annular seal space is 160 DEG C of left and right, there are some researches show at glass fiber reinforced polypropylene plastics and have reasonable bating effect at this temperature lower plywood, shearing strength between layers can be obviously less, greatly improves formability.Be heated to after 160 DEG C, also will at this temperature, be incubated 10min so that thermoplastic glass fiber reinforced aramid aluminiumlaminates homogeneous heating.Wherein the central circular hole of flanging die has fillet, so that the shaping of thermoplastic glass fiber reinforced aramid aluminiumlaminates.Meanwhile, storage capacitor to electro-magnetic forming equipment charges, when charging voltage reaches after shaping voltage 2KV, discharge coil 3 is discharged, under the effect of the electromagnetic force that thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 produces at discharge coil 3, make material paste rapidly mould, after distortion, do not remove immediately sealing pressing flange, use suitably heating and make temperature in sealing pressing flange cool to room temperature at the uniform velocity in 5min by steam vent and outside method of carrying out heat exchange of resistance wire, to discharge the residual thermal stress in cooling procedure, the cracking between preventing layer flaggy.In the time that being reduced to room temperature, the temperature in sealing pressing flange just completes the shaping to thermoplastic glass fiber reinforced aramid aluminiumlaminates.Shape after thermoplastic glass fiber reinforced aramid aluminiumlaminates is shaped as shown in figure 11.Free margins place carries out local heat to 160 degree Celsius, cooling under the pressure of 3Mpa subsequently, and be 2min cool time, sticky to prevent opening of interlayer.
In sum, the electromagnetic forming method of thermoplastic glass fiber reinforced aramid aluminiumlaminates of the present invention, specifically comprises the following steps:
Step 1, thermoplastic glass fiber reinforced aramid aluminiumlaminates is fixed on base 7, then sealing pressing flange 1 is placed in the groove of base, and sealing pressing flange 1 is applied to suitable pressure with hydraulic cylinder 12, so that thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 is produced to suitable pressure-pad-force.
Wherein, hydraulic cylinder 12 is to be fixed by bolts on top board 10, and the reaction force producing in the time acting on effectively on sealing pressing flange 1 is born by the bolt of fixing top board;
In this step, the effect of described upper lower platen is for thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 to be formed is pressed against on electro-magnetic forming coil 3, and ensures that discharge coil 3 and coil rack 4 thereof are fixed well;
In this step, described sealing pressing flange and base are provided with bead so that enough pressure-pad-forces to be provided.
Step 2, switch on to the resistance wire 9 in sealing pressing flange 1, make the temperature in mould be elevated to softening temperature, thermoplastic glass fiber reinforced aramid aluminiumlaminates 2 is carried out to homogeneous heating, to reach the object that improves its plastic deformation performance.In thermoplastic glass fiber reinforced plymetal, this is a vital step, otherwise be shaped can be very poor.
In this step, described sealing pressing flange side is provided with steam vent 8, to guarantee that the gas in sealing pressing flange can discharge, in order to avoid the shaping of thermoplastic glass fiber reinforced aramid aluminiumlaminates is played to inhibition.
In this step, the intensification temperature of described thermoplastic glass fiber reinforced aramid aluminiumlaminates is used thermocouple to survey, and makes temperature stabilization in preset range.
In this step, described resistance wire, its overall shape be circular and be placed in thermoplastic glass fiber reinforced aramid aluminiumlaminates directly over, to improve the efficiency of heating surface and to make heating more even.
Step 3, thermoplastic glass fiber reinforced aramid aluminiumlaminates is carried out to the insulation of Preset Time and temperature.Being heated to after 160 DEG C, be incubated laminate, so that each several part heating all.
Step 4, the storage capacitor of electro-magnetic forming equipment is charged, when charging voltage reaches after the shaping voltage 2-15Kv of setting, disconnect charge circuit;
In this step, described discharge voltage is to estimate according to the thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates, and test accordingly and determine be shaped time optimum discharge voltage.
Step 5, closed electromagnetic shaping discharge loop, storage capacitor discharges to electro-magnetic forming coil, and under the effect of electromagnetic force, there is distortion at a high speed in thermoplastic glass fiber reinforced aramid aluminiumlaminates.
In this step, described electro-magnetic forming process is: by closed circuit switch, make capacitor discharge, the heavy current of discharge generation produces induced field around it by coil, in workpiece, produce induced-current simultaneously, induced-current produces induced field at thermoplastic glass fiber reinforced aluminium alloy layer panel area again, the magnetic field force of the induced field that the induced field that thermoplastic glass fiber reinforced aramid aluminiumlaminates produces and coil produce repels mutually, and thermoplastic glass fiber reinforced aramid aluminiumlaminates, under the effect of powerful electromagnetic force, plastic deformation occurs.
In addition, in described electro-magnetic forming process, aramid aluminiumlaminates plays the effect of driving chip, and the glass fibre laminate poor to electric conductivity applies motive force, makes laminate entirety under the effect of electromagnetic force that plastic deformation occur.
In this step, described electro-magnetic forming coil 3 and winding wire ring framework 4 are through having insulating properties well with thermoplastic glass fiber reinforced aramid aluminiumlaminates together with high-strength insulating resin solidification.
Step 6, complete after distortion at thermoplastic glass fiber reinforced aramid aluminiumlaminates, control cooldown rate to eliminate in cooling procedure, due to the different residual thermal stresses that produce of layers of material shrinkage factor.
Concrete grammar is to use thermocouple induction temperature, then by the firing rate of temperature controller controlling resistance silk and the flow of air, to reach the object of controlling cooldown rate.In the forming process of laminate, quality and the serviceability of the control of temperature on laminate has vital impact, so temperature control is quite crucial.
Step 7, after electro-magnetic forming completes, free margins place is carried out to local heat, cooling under sufficiently high pressure subsequently, sticky to prevent opening of interlayer.
The effect of free edge refers to the free boundary place at composite-material laminates, due to the Poisson coefficient of coup or stretching-shearing coefficient of coup difference of each lamina, has the very large concentrated phenomenon of inter-laminar stress
Because there is free edge effect on the formula that the sections side of thermoplastic glass fiber reinforced aramid aluminiumlaminates laminate, thus need to cooling procedure in carry out local heating, thereby improve the serviceability of thermoplastic glass fiber reinforced aramid aluminiumlaminates.
In the present invention, the thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates is 0.7~4mm.

Claims (10)

1. the building mortion of a thermoplastic glass fiber reinforced aramid aluminiumlaminates, it is characterized in that: comprise sealing pressing flange (1), discharge coil (3), winding wire ring framework (4), bolt (5, 11), lower platen (6), base (7), resistance wire (9), top board (10), hydraulic cylinder (12), wherein, bolt (5, 11) adopt the mode of welding to be connected with the bottom of top board (10), hydraulic cylinder (12) is fixed on top board (10), the working arm of hydraulic cylinder (12) passes the centre bore of top board (10) to downward-extension, the working arm lower end of hydraulic cylinder (12) and sealing pressing flange (1) are connected, and on working arm, be welded with stroke limit piece (13), on the sidewall of sealing pressing flange (1), have steam vent (8),
Base (7) is fixed on lower platen (6); Described sealing pressing flange (1) has groove;
After thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) location, opening power, utilizes resistance wire (9) to heat thermoplastic glass fiber reinforced aramid aluminiumlaminates (2), until temperature stabilization is at preset temperature;
Storage capacitor to building mortion charges, and when storage capacitor voltage reaches after shaping voltage, discharge coil (3) is discharged, and thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) deforms under the effect of discharge coil (3) generation electromagnetic force.
2. the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates according to claim 1, it is characterized in that: thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is positioned in the detent of base (7), and sealing pressing flange (1) is placed on thermoplastic glass fiber reinforced aramid aluminiumlaminates (2).
3. the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates according to claim 1, it is characterized in that: after thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) distortion, do not remove sealing pressing flange (1), use suitably heating and the method for carrying out heat exchange by steam vent (8) and the external world of resistance wire, make temperature in sealing pressing flange cool to room temperature at the uniform velocity in 5min.
4. the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates according to claim 1, is characterized in that: in the time that masterpiece is used on sealing pressing flange, the reaction force of generation is born by the bolt (5,11) of fixing top board (10).
5. utilize the building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates described in claim 1 to carry out the method for material forming, it is characterized in that:
Step 1, thermoplastic glass fiber reinforced aramid aluminiumlaminates is fixed on base (7), then sealing pressing flange (1) is placed in the groove of base, and sealing pressing flange (1) is applied to suitable pressure with hydraulic cylinder (12), so that thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is produced to suitable pressure-pad-force;
Step 2, by resistance wire (9) energising in sealing pressing flange (1), thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is carried out to homogeneous heating;
Step 3, thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is carried out to the insulation of Preset Time and temperature, after being heated to preset temperature, thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is incubated, so that each several part homogeneous heating;
Step 4, the storage capacitor of electro-magnetic forming equipment is charged, when charging voltage reaches after the shaping voltage 2-15Kv of setting, disconnect charge circuit;
Step 5, closed electromagnetic shaping discharge loop, storage capacitor discharges to electro-magnetic forming coil, and under the effect of electromagnetic force, there is distortion at a high speed in thermoplastic glass fiber reinforced aramid aluminiumlaminates (2);
Step 6, complete after distortion at thermoplastic glass fiber reinforced aramid aluminiumlaminates (2), control cooldown rate to eliminate in cooling procedure due to the different residual thermal stresses that produce of layers of material shrinkage factor;
Step 7, after electro-magnetic forming completes, free margins place is carried out to local heat, cooling under sufficiently high pressure subsequently, opening between preventing layer is sticky.
6. method according to claim 5, it is characterized in that: in step 1, by the effect of upper lower platen, thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) to be formed is pressed against to electro-magnetic forming coil (3) upper, and ensure that discharge coil (3) and coil rack (4) thereof are fixed well.
7. method according to claim 5, is characterized in that: in step 2, described sealing pressing flange (1) side is provided with steam vent (8), to guarantee that the gas in sealing pressing flange can discharge in time.
8. method according to claim 5, is characterized in that: in step 2, use thermocouple to survey the intensification temperature of described thermoplastic glass fiber reinforced aramid aluminiumlaminates (2), and make temperature stabilization in preset range.
9. method according to claim 5, is characterized in that: in step 5, described electro-magnetic forming coil (3) and coil rack (4) are solidified togather through insulating resin, and have good insulating properties with thermoplastic glass fiber reinforced aramid aluminiumlaminates.
10. method according to claim 5, is characterized in that: in step 1, the thickness of thermoplastic glass fiber reinforced aramid aluminiumlaminates (2) is 0.7~4mm.
CN201410128520.0A 2014-04-01 2014-04-01 A kind of building mortion of thermoplastic glass fiber reinforced aramid aluminiumlaminates and method Expired - Fee Related CN103861932B (en)

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