CN107971382B - A kind of device and method can be used for panel stiffness mould bulging and hydraulic bulge test - Google Patents
A kind of device and method can be used for panel stiffness mould bulging and hydraulic bulge test Download PDFInfo
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- CN107971382B CN107971382B CN201711181880.7A CN201711181880A CN107971382B CN 107971382 B CN107971382 B CN 107971382B CN 201711181880 A CN201711181880 A CN 201711181880A CN 107971382 B CN107971382 B CN 107971382B
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- 238000012360 testing method Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 57
- 238000012546 transfer Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011946 reduction process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- Life Sciences & Earth Sciences (AREA)
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A kind of device and method can be used for panel stiffness mould bulging and hydraulic bulge test, solve the problems, such as existing test mould have a single function, interchangeability it is poor.The present invention can be used for rigid mould bulging and hydraulic bulge test by changing the installation site of blank holder and die socket to change the usage of device.The cavity plate abaculus that inner ring is different cavity plate diameters can be correspondingly replaced according to the hemispherical head bulging Male Die Size that rigid mould bulging test uses and different plate thicknesss.The needs of sheet metal deformation strain paths can be changed according to hydraulic bulge test process, replacement inner ring is the cavity plate abaculus of different cavity plate diameters or different ellipticities.So as to carry out the panel stiffness mould bulging test of different-thickness and become the hydraulic bulge test of strain paths.Meanwhile the present invention has test mould handling simple, the advantages that increasing the flexibility of test and the interchangeability of mold, reduce die cost expense.
Description
Technical field
The invention belongs to analyze and survey control technology field, more particularly to one kind can be used for panel stiffness mould bulging with
The device and method of hydraulic bulge test.
Background technique
Determine that material property is the necessary ways for studying metal material deformational behavior and forming defects control.Wherein, plate
Forming limit and material flow stress are to reflect the critical performance parameters of material property.Forming limit diagram is by sheet metal
Under strain conditions the figure that constitutes of attainable ultimate strain value can be used for pre- drafting board in conjunction with numerical simulation technology
The generation of material forming process defect.For the material flow stress that test obtains, the elastic and plastic properties that can be used under complex strain paths
The numerical simulation of deformation process, and solve the engineering technology problem in relation to material stress.
In laboratory conditions, the method that rigid punch-pin carries out bulging to sheet metal usually can be used and measure forming limit
Figure.It can also be used in conjunction with single hydraulic bulge test method measurement forming limit diagram for drawing test with variation ellipse rate cavity plate.Rigid mould
When bulging test, there is the sample of grid circle to be placed between cavity plate and blank holder side plate wheat flour, fasten sample using pressure-pad-force
Material, sample middle part are deformed under the action of punch-pin and are formed convex closure, and the grid circle on surface deforms, and works as convex closure
It is upper some locally generate stop when constriction perhaps rupture test measure grid circle long axis near constriction or rupture zone with it is short
Thus shaft size calculates the limiting strain of metal sheet surface.Change test sheet metal blank size shape, repeats above-mentioned
Step, to measure the limiting strain under different conditions.According to test bit, shaping limit curve is drawn, forming pole can be obtained
Limit figure.Draw test similar with rigid mould expanding method with the method for the hydraulic bulge test of variation ellipse rate cavity plate in conjunction with single.Liquid
Constriction or rupture zone grid circle nearby are measured after pressing bulging, limiting strain is calculated.According to singly the obtained limit being drawn to answer
Become, shaping limit curve is drawn in the limiting strain that oval cavity plate hydraulic expanding-forming obtains, to obtain forming limit diagram.The two difference
It is the difference of strain paths to shift gears with bulging mode.Rigid mould expanding method is by changing sheet shape and size
To change strain paths.And hydraulic expansion method is to change the strain road of sheet metal by changing oval cavity plate ellipticity
Diameter.For bulging mode, the former is by rigid hemispherical head punch-pin bulging, and the latter is by fluid media (medium) hydraulic expanding-forming.
For currently in the widely used plate liquid-filling shaping technique in the fields such as aerospace, automobile, hydraulic expanding-forming
The material property that testing the material flowability obtained can obtain than traditional one directional tensile test is more in line with the practical feelings of liquid-filling shaping
Condition.Hydraulic expanding-forming biggest advantage is no friction, can sufficiently show material property.During bulging test thin plate it is two-way by
Power is different from the uniaxial stressed state of one directional tensile test, and bulging test does not have necking phenomenon, and breaking strain is unidirectional draws
2 times or so stretched.By record fluid pressure and bulging height to calculate material flow stress in test.
For the technology characteristics of differing formed method, obtained under the selection process conditions similar with practical forming process
Material property parameter more precisely can be used to predict the material deformation of forming process and the generation of defect.Rigid mould
The material forming limit that bulging measures can be used for the techniques such as conventional rigid die drawing Deep forming.Test and oval cavity plate are drawn in conjunction with single
The material forming limit that hydraulic expanding-forming measures can be used for the hydraulic assist formation technique such as liquid-filling shaping.
Existing rigid mould expanding die has a single function with hydraulic expanding die, and rigid mould expanding die is limited only to just
Property mould bulging test, hydraulic expanding die are limited only to related hydraulic bulge test.And rigid mould bulging test obtains plate
The process of forming limit needs to change the gap between punch-pin and cavity plate according to surveyed plate thickness.If necessary to measure not
The material properties such as the forming limit with material different-thickness plate need to develop various sizes of test mould respectively.So that examination
Cost increase is tested, test mould use is not convenient enough.
Summary of the invention
In order to solve deficiency existing for above-mentioned test mould, a kind of the purpose of the present invention is to provide flexibilities good, mold
Interchangeability is strong, handling simply can be used for rigid mould bulging test and hydraulic bulge test, and can be by replacing cavity plate abaculus
To change the composable mold of bulging test cavity plate diameter.
A kind of device can be used for panel stiffness mould bulging and hydraulic bulge test includes: that liquid chamber, die socket, cavity plate are embedding
Block, blank holder, flanging transfer block, flanging block, hemispherical head bulging punch-pin, fluting tapered end holding screw, hexagon socket cap head screw,
O shape rubber seal.Composable mold may be respectively used in different ways after assembling die according to different experimental uses
Rigid mould bulging and hydraulic bulge test.
When the device is used for rigid mould bulging test, by liquid chamber, die socket, cavity plate abaculus, fluting tapered end clamp screw
Nail, blank holder, flanging transfer block, flanging block, hemispherical head bulging punch-pin, hexagon socket cap head screw etc. are assembled.After connection
Liquid chamber is fixed on compressor operation table top by 70.1M16 × 50 hexagon socket cap head screw GB/T and briquetting.Justified by interior hexagonal
Chapiter screw GB/T fixes die socket and liquid chamber 70.1M12 × 30.It is Φ by internal diameter by the way of the location fit of gap
The cavity plate abaculus of 102.1mm is embedded in die socket.Cavity plate abaculus is carried out by fluting 71M10 × 40 tapered end holding screw GB/T
It is fixed.Blank holder and flanging transfer block are mutually fixed by 70.1M12 × 30 hexagon socket cap head screw GB/T.Flanging block with
The flanging cylinder screw thread rod end of press is connected.Flanging block passes through hexagon socket cap head screw GB/T with flanging transfer block again
70.1M10 × 25 phases are fixed.Hemispherical head bulging punch-pin is solid by 70.1M12 × 45 hexagon socket cap head screw GB/T and press
It is fixed.In blank holder, die socket contact jaw design processing guide groove, the closure of clamping process blank holder and die socket is guided.
The device be used for hydraulic bulge test when, by liquid chamber, die socket, cavity plate abaculus, fluting tapered end holding screw,
Blank holder, flanging transfer block, flanging block, O shape rubber seal, hexagon socket cap head screw etc. are assembled.By interior after connection
Liquid chamber is fixed on compressor operation table top by hexagonal cylindrical head 70.1M16 × 50 screw GB/T and briquetting.By interior hexagonal cylindrical head
Screw GB/T fixes blank holder and liquid chamber 70.1M12 × 30.It is carried out between blank holder and liquid chamber with O shape rubber seal close
Envelope.It, can be to liquid chamber filling liquid after hydraulic system pipeline is connected with pouring orifice.By the way of the location fit of gap, bulging is used
Cavity plate abaculus be embedded in die socket.Cavity plate abaculus is fixed by fluting 71M10 × 40 tapered end holding screw GB/T.It is logical
70.1M12 × 30 hexagon socket cap head screw GB/T are crossed mutually to fix die socket and flanging transfer block.The pressure of flanging block and press
Side cylinder screw thread rod end is connected.Flanging block passes through hexagon socket cap head screw GB/T 70.1M10 × 25 phase with flanging transfer block again
It is fixed.
The cavity plate abaculus of described device can be replaced according to the needs of use.Cavity plate abaculus outer diameter is all Φ 130mm, and cavity plate is embedding
Block is matched with the cavity plate abaculus installing blind that die socket is processed.It, can be according to hemispherical head convex mould diameter, plate when rigid mould bulging
Material thickness, clearance between punch and die design corresponding cavity plate abaculus internal diameter (i.e. cavity plate diameter).In the rigidity for carrying out different-thickness plate
When mould bulging test, corresponding cavity plate abaculus is only needed to change.When hydraulic expanding-forming, it can equally design different according to the needs of use
Cavity plate abaculus inner diameter size, carry out hydraulic bulge test.Meanwhile cavity plate abaculus inner ring can be designed to the ellipse of different ellipticities
Round changes the sheet metal deformation strain paths of hydraulic expanding-forming process with this.It is embedding that test process can replace different cavity plates
Block, to measure the plate hydraulic expanding-forming limiting strain under differently strained path.
A kind of rigid mould bulging test application method for the device can be used for panel stiffness mould bulging and hydraulic bulge test,
Specifically comprise the following steps:
Step 1, according to rigid mould bulging test mold mounting means after the assembly is completed, control hydraulic press, by blank holder
Trouble free service height is up to punch-pin.Suitable position is put into the positioning of rigid mould bulging test sample, and is formed with sample
The plate face of strain analysis grid reclines die socket and cavity plate abaculus.
The hydraulic presses test parameters such as step 2, setting pressure-pad-force, punch-pin speed, control load.
Step 3, control blank holder downlink, mold with die socket, compress sample, prevent Bulging Process plate from flowing inwards.
Sample is carried out rigid mould bulging by step 4, the punch-pin speed control punch-pin downlink with setting.The rupture of sample constriction
Afterwards, load reduction process stops punch-pin downlink immediately.
Step 5, control blank holder and punch-pin go upward to safe altitude, sample are taken out, to the grid near sample constriction
Carry out strain measurement.
Step 6, repeating the above steps carries out the rigid mould bulging test of other samples.
A kind of hydraulic bulge test application method for the device can be used for panel stiffness mould bulging and hydraulic bulge test, tool
Body includes the following steps:
After assembling according to the mold mounting means of hydraulic bulge test, hydraulic press related process parameters are arranged in step 1,
Set hydraulic expanding-forming liquid chamber pressure, pressure-pad-force.
Step 2, operation hydraulic press workbench make pressurized cylinder backhaul, while toward liquid chamber fluid infusion, until liquid reaches blank holder
Until upper surface.
Step 3 positions bulging plate, is put in blank holder upper surface.And plate is made to be formed with the plate face of strain analysis grid
Recline die socket and cavity plate abaculus.
Step 4, control flanging cylinder downlink, mold die socket downlink and blank holder.Sample is compressed with the pressure-pad-force of setting,
Prevent hydraulic expanding-forming process plate from flowing inwards.
Step 5 carries out filling liquid bulging with the liquid chamber pressure of setting.According to the numerical value of liquid chamber pressure real-time monitoring, work as bulging
After pressure starts decaying, stop filling liquid.
Step 6, control pressurized cylinder are retracted, and control liquid chamber oil return.
Step 7, control flanging cylinder are retracted, and die socket is up to safe altitude.
Step 8 takes out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to test.
Step 9, if do not needed to change cavity plate abaculus, then prepare another plate, repeat the above steps, carry out hydraulic expanding-forming.Such as
Sheet metal deformation strain paths need to be changed, then replace the cavity plate abaculus of different ellipticities.It is quasi- after locking cavity plate abaculus by holding screw
Slave board material, repeats the above steps, and carries out hydraulic expanding-forming.
Advantages of the present invention with have the active effect that
(1) the panel stiffness mould bulging and hydraulic bulge test composable mold, can be by changing blank holder and die socket
Installation site, to change the usage mode of composable mold, be used for rigid mould bulging and hydraulic bulge test, to enrich mould
The use function of tool.
It (2) can be according to the plate for hemispherical head the rigid mould bulging Male Die Size and different-thickness that rigid mould bulging test uses
Material correspondingly replaces the cavity plate abaculus that inner ring is different cavity plate diameters.Or sheet metal deformation is changed according to hydraulic bulge test and is answered
Become the needs in path, replacement inner ring is the cavity plate abaculus of different cavity plate diameters or different ellipticities.So as to carry out difference
The rigid mould bulging test of thickness plate and the hydraulic bulge test for becoming strain paths.
(3) test mould handling are simple.The flexibility of test and the interchangeability of mold are increased, die cost expense is reduced
With.
Detailed description of the invention
Fig. 1 is a kind of rigid mould bulging of device that can be used for panel stiffness mould bulging and hydraulic bulge test of the invention
Mold assembling schematic diagram；
Fig. 2 is a kind of hydraulic expanding-forming mould of device that can be used for panel stiffness mould bulging and hydraulic bulge test of the invention
Has assembling schematic diagram；
Fig. 3 is a kind of flanging transfer block of device that can be used for panel stiffness mould bulging and hydraulic bulge test of the invention
With flanging block structure schematic diagram；
Fig. 4 is that a kind of cavity plate abaculus of device that can be used for panel stiffness mould bulging and hydraulic bulge test of the invention shows
It is intended to；
Fig. 5 is a kind of rigid mould bulging of device that can be used for panel stiffness mould bulging and hydraulic bulge test of the invention
Mold and hydraulic expanding die assembling schematic diagram.
In figure:
1- liquid chamber；2- hexagon socket cap head screw；3- die socket；4- cavity plate abaculus；5- blank holder；6- flanging turns
Connect block；7- hemispherical head bulging punch-pin；8- flanging block；9- fluting tapered end holding screw；10-O shape rubber seal；In 11-
Hex screw.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
As shown in Figure 1, Figure 2 and Fig. 5, a kind of device packet can be used for panel stiffness mould bulging and hydraulic bulge test of the invention
Include: liquid chamber 1, hexagon socket cap head screw 2, die socket 3, cavity plate abaculus 4, blank holder 5, flanging transfer block 6, hemispherical head bulging are convex
Mould 7, flanging block 8, tapered end holding screw 9 of slotting, O shape rubber seal 10, soket head cap screw 11.Composable mold is according to different
Experimental use in different ways after assembling die, may be respectively used for rigid mould bulging test (shown in Fig. 1) and Hydraulic Expansion
Shape tests (shown in Fig. 2).
Such as Fig. 1, when the composable mold is used for rigid mould bulging test, by liquid chamber 1, die socket 3, cavity plate abaculus 4 is opened
Slot tapered end holding screw 9, blank holder 5, flanging transfer block 6, flanging block 8, hemispherical head bulging punch-pin 7, hexagon socket cap head screw 2
Etc. being assembled.Liquid chamber is fixed on compressor operation by 70.1M16 × 50 hexagon socket cap head screw GB/T and briquetting after connection
On table top.It is by hexagon socket cap head screw 2 that die socket 3 and liquid chamber 1 is fixed.With radial using gap location fit, axial benefit
The cavity plate abaculus 4 that internal diameter is Φ 102.1mm is embedded in die socket 3 by the mode positioned with 3 central axis blind hole bottom surface of die socket.It is logical
It crosses fluting tapered end holding screw 9 cavity plate abaculus 4 is fixed.It is straight that 4 internal diameter of cavity plate abaculus is less than 3 center shaft through-hole of die socket
Diameter, therefore by can be convenient to 4 inner diameter edge of cavity plate abaculus to the cavity plate abaculus bottom surface applied force between 3 through-hole of die socket
Cavity plate abaculus 4 is taken out on ground.Blank holder 5 and 6 phase of flanging transfer block are fixed by hexagon socket cap head screw 2.In flanging block 8
Spindle thread hole is connected with the flanging cylinder rod end screw thread of press.Such as Fig. 3, flanging block 8 passes through interior hexagonal with flanging transfer block 6 again
11 phase of screw is fixed.To which pumping for flanging cylinder drives blank holder 5 to move up and down.Hemispherical head bulging punch-pin 7 passes through
70.1M12 × 45 hexagon socket cap head screw GB/T are fixed with press master cylinder shaft end.In blank holder 5, the contact jaw of die socket 3
Design, processing guide groove, guide the closure of clamping process blank holder 5 and die socket 3.
Such as Fig. 2, when the composable mold is used for hydraulic bulge test, by liquid chamber 1, die socket 3, cavity plate abaculus 4 is slotted
Tapered end holding screw 9, blank holder 5, flanging transfer block 6, flanging block 8, O shape rubber seal 10, hexagon socket cap head screw 2 etc.
It is assembled.Liquid chamber is fixed on press bed by 70.1M16 × 50 hexagon socket cap head screw GB/T and briquetting after connection
On face.It is by hexagon socket cap head screw 2 that blank holder 5 and liquid chamber 1 is fixed.The rubber seal of O shape is used between blank holder 5 and liquid chamber 1
Circle 10 is sealed.It, can be to liquid chamber filling liquid after hydraulic system pipeline is connected with the pouring orifice at 1 left end of liquid chamber.It is adopted with radial
It is axial in the way of the positioning of 3 central axis blind hole bottom surface of die socket with the mode of gap location fit, the cavity plate of bulging is embedding
Block 4 is embedded in die socket 3.Cavity plate abaculus 4 is fixed by fluting tapered end holding screw 9.Pass through hexagon socket cap head screw 2
Die socket 3 and 6 phase of flanging transfer block are fixed.8 central axle threads hole of flanging block is connected with the flanging cylinder rod end screw thread of press.
Flanging block 8 is fixed with flanging transfer block 6 by the hexagon socket cap head screw GB/T phase of 70.1M10 × 25 again.To flanging cylinder
It pumps and die socket 3 is driven to move up and down.
The cavity plate abaculus 4 of the composable mold can be replaced according to the needs of use.4 outer diameter of cavity plate abaculus is all Φ 130mm,
Cavity plate abaculus 4 is matched with the cavity plate abaculus installing blind that die socket 3 is processed.It, can be according to hemisphere alliteration when rigid mould bulging
Diameter, plate thickness, the clearance between punch and die of shape punch-pin 7 design the internal diameter (i.e. cavity plate diameter) of corresponding cavity plate abaculus 4.Into
When the rigid mould bulging test of row different-thickness plate, only corresponding cavity plate abaculus 4 need to be replaced according to plate thickness.Hydraulic Expansion
When shape, equally the inner diameter size of different cavity plate abaculus 4 can be designed according to the needs of use, carry out hydraulic bulge test.Together
When, the inner ring of cavity plate abaculus 4 can be designed to the elliptical shape of different ellipticities, change the plate of hydraulic expanding-forming process with this
Deformation strain path.Test process can replace different cavity plate abaculus 4, so that the plate measured under differently strained path is hydraulic
Bulging limiting strain.
A kind of rigid mould bulging test application method for the device can be used for panel stiffness mould bulging and hydraulic bulge test,
Specifically comprise the following steps:
Step 1, according to rigid mould bulging test as shown in Figure 1 mold mounting means after the assembly is completed, control it is hydraulic
Blank holder 5 and hemispherical head bulging punch-pin 7 are up to trouble free service height by machine.The positioning of rigid mould bulging test sample is put
To suitable position, and the plate face for making sample be formed with strain analysis grid reclines die socket 3 and cavity plate abaculus 4.
The hydraulic presses test parameters such as step 2, setting pressure-pad-force, punch-pin speed, control load.
Step 3, control 5 downlink of blank holder, mold with die socket 3, compress sample, prevent Bulging Process plate from flowing inwards
It is dynamic.
Sample is carried out rigid mould bulging by step 4,7 downlink of punch-pin speed control hemispherical head bulging punch-pin with setting.Examination
After the rupture of sample constriction, load reduction process stops 7 downlink of hemispherical head bulging punch-pin immediately.
Step 5, control blank holder 5 and punch-pin 7 go upward to safe altitude, sample are taken out, to the net near sample constriction
Lattice carry out strain measurement.
Step 6, the panel stiffness mould bulging test for such as carrying out different-thickness, need to change cavity plate diameter, then unclamp fluting
Tapered end holding screw 9 takes out former cavity plate abaculus 4, replaces corresponding cavity plate abaculus 4, tightens fluting tapered end holding screw 9 and carries out
It is fixed, and repeat the above steps and carry out the rigid mould bulging test of other samples.Such as carry out same thickness plate rigid mould bulging
Test, then repeat the above steps and carry out the rigid mould bulging test of other samples.
A kind of hydraulic bulge test application method for the device can be used for panel stiffness mould bulging and hydraulic bulge test, tool
Body includes the following steps:
After assembling according to the mold mounting means of hydraulic bulge test as shown in Figure 2, hydraulic press phase is arranged in step 1
Technological parameter is closed, hydraulic expanding-forming liquid chamber pressure, pressure-pad-force are set.
Step 2, control hydraulic press workbench make pressurized cylinder backhaul, while toward 1 fluid infusion of liquid chamber, until liquid reaches flanging
Until enclosing 5 upper surfaces.
Step 3 positions bulging plate, is put in 5 upper surface of blank holder.And plate is made to be formed with the plate face of strain analysis grid
Recline die socket 3 and cavity plate abaculus 4.
Step 4, control flanging cylinder downlink, mold 3 downlink of die socket and blank holder 5.Examination is compressed with the pressure-pad-force of setting
Sample prevents hydraulic expanding-forming process plate from flowing inwards.
Step 5 carries out filling liquid bulging with the liquid chamber pressure of setting.According to the numerical value of liquid chamber pressure real-time monitoring, work as bulging
After pressure starts decaying, stop filling liquid.
Step 6, control pressurized cylinder are retracted, and control liquid chamber oil return.
Step 7, control flanging cylinder are retracted, and die socket 3 is up to safe altitude.
Step 8 takes out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to test.
Step 9, if do not needed to change cavity plate abaculus 4, then prepare another plate, repeat the above steps, carry out hydraulic expanding-forming.Such as
Sheet metal deformation strain paths need to be changed, then replace the cavity plate abaculus 4 of different ellipticities.It is locked by fluting tapered end holding screw 9 recessed
After mould abaculus 4, prepare plate, repeat the above steps, carries out hydraulic expanding-forming.
Claims (4)
1. a kind of device that can be used for panel stiffness mould bulging and hydraulic bulge test, which is characterized in that the device includes:
Liquid chamber (1), hexagon socket cap head screw (2), die socket (3), cavity plate abaculus (4), blank holder (5), flanging transfer block (6), half
Bulb bulging punch-pin (7), flanging block (8) are slotted tapered end holding screw (9), O shape rubber seal (10), soket head cap screw
(11)；
When the device is used for rigid mould bulging test, by six hexagon socket cap head screws (2) by die socket (3) after connection
It is fixed with liquid chamber (1)；Blank holder (5) and flanging transfer block (6) are mutually fixed by six hexagon socket cap head screws (2)；Half
Bulb bulging punch-pin (7) is fixed by hexagon socket cap head screw and press master cylinder shaft end；When for hydraulic bulge test, by six
A hexagon socket cap head screw (2) is fixed by blank holder (5) and liquid chamber (1)；O shape rubber is used between blank holder (5) and liquid chamber (1)
Sealing ring (10) is sealed；It, can be to liquid chamber filling liquid after hydraulic system pipeline is connected with the pouring orifice at liquid chamber (1) left end；
The channel extreme lower position of pouring orifice and liquid chamber (1) lumen contact is slightly below the inner chamber bottom surface of liquid chamber (1)；Pass through six interior hexagonal circles
Chapiter screw (2) mutually fixes die socket (3) and flanging transfer block (6)；Blank holder (5), die socket (3) contact jaw design,
It is machined with guide groove；The end face structure geomery that blank holder (5), die socket (3) are connect with liquid chamber (1), flanging transfer block (6)
It is identical；Radially to use gap location fit, axially in the way of the positioning of die socket (3) central axis blind hole bottom surface, by cavity plate
Abaculus (4) is embedded in die socket (3)；Cavity plate abaculus (4) is fixed by fluting tapered end holding screw (9)；Cavity plate abaculus (4)
Internal diameter is less than die socket (3) central axis through-hole diameter；The flanging cylinder rod end screw thread phase in flanging block (8) central axle threads hole and press
Connection；Flanging block (8) is mutually fixed with flanging transfer block (6) by soket head cap screw (11) again.
2. a kind of device that can be used for panel stiffness mould bulging and hydraulic bulge test according to claim 1, feature
It is, cavity plate abaculus (4) can be replaced according to the needs of use；Cavity plate abaculus (4) outer diameter is all Φ 130mm, cavity plate abaculus (4) with
The cavity plate abaculus installing blind of die socket (3) processing matches；It, can be according to hemispherical head bulging punch-pin (7) when rigid mould bulging
Diameter, plate thickness, clearance between punch and die, design the internal diameter (i.e. cavity plate diameter) of corresponding cavity plate abaculus (4)；Carrying out difference
When the rigid mould bulging test of thickness plate, only corresponding cavity plate abaculus (4) need to be replaced according to plate thickness；When hydraulic expanding-forming,
Equally the inner diameter size of different cavity plate abaculus (4) can be designed according to the needs of use, carry out hydraulic bulge test；Meanwhile it is recessed
The inner ring of mould abaculus (4) can be designed to the elliptical shape of different ellipticities, be become with this to change the plate of hydraulic expanding-forming process
Shape strain paths；Test process can replace different cavity plate abaculus (4), so that the plate measured under differently strained path is hydraulic
Bulging limiting strain.
3. a kind of rigid mould using the device described in claim 1 that can be used for panel stiffness mould bulging and hydraulic bulge test
Bulging test application method, which is characterized in that this method specifically includes the following steps:
Step 1, according to rigid mould bulging test mold mounting means after the assembly is completed, control hydraulic press, by blank holder (5) with
Hemispherical head bulging punch-pin (7) is up to trouble free service height；Suitable position is put into the positioning of rigid mould bulging test sample, and
The plate face for making sample be formed with strain analysis grid reclines die socket (3) and cavity plate abaculus (4)；
Step 2, setting pressure-pad-force, punch-pin speed, control load test parameters；
Step 3, control blank holder (5) downlink, mold with die socket (3), compress sample, prevent Bulging Process plate from flowing inwards
It is dynamic；
Sample is carried out rigid mould bulging by step 4, punch-pin speed control hemispherical head bulging punch-pin (7) downlink with setting；Sample
After constriction rupture, load reduction process stops hemispherical head bulging punch-pin (7) downlink immediately；
Step 5, control blank holder (5) and punch-pin (7) are up to safe altitude, sample are taken out, to the net near sample constriction
Lattice carry out strain measurement；
Step 6, the panel stiffness mould bulging test for such as carrying out different-thickness, need to change cavity plate diameter, then unclamp fluting tapered end
Former cavity plate abaculus (4) is taken out, replaces corresponding cavity plate abaculus (4) by holding screw (9), tightens fluting tapered end holding screw (9)
It is fixed, and repeats the above steps and carry out the rigid mould bulging test of other samples；Such as carry out same thickness plate rigid mould
Bulging test then repeats the above steps and carries out the rigid mould bulging test of other samples.
4. a kind of Hydraulic Expansion using the device described in claim 1 that can be used for panel stiffness mould bulging and hydraulic bulge test
Shape test application method, which is characterized in that this method specifically includes the following steps:
After assembling according to the mold mounting means of hydraulic bulge test, hydraulic press related process parameters, setting is arranged in step 1
Hydraulic expanding-forming liquid chamber pressure, pressure-pad-force；
Step 2, control hydraulic press workbench make pressurized cylinder backhaul, while toward liquid chamber (1) fluid infusion, until liquid reaches blank holder
(5) until upper surface；
Step 3 positions bulging plate, is put in blank holder (5) upper surface；And the plate face for making plate be formed with strain analysis grid is pasted
By die socket (3) and cavity plate abaculus (4)；
Step 4, control flanging cylinder downlink, mold die socket (3) downlink and blank holder (5)；Examination is compressed with the pressure-pad-force of setting
Sample prevents hydraulic expanding-forming process plate from flowing inwards；
Step 5 carries out filling liquid bulging with the liquid chamber pressure of setting；According to the numerical value of liquid chamber pressure real-time monitoring, when bulging pressure
After starting decaying, stop filling liquid；
Step 6, control pressurized cylinder are retracted, and control liquid chamber oil return；
Step 7, control flanging cylinder are retracted, and die socket (3) is up to safe altitude；
Step 8 takes out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to test；
Step 9, if do not needed to change cavity plate abaculus (4), then prepare another plate, repeat the above steps, carry out hydraulic expanding-forming；If you need to
Change sheet metal deformation strain paths, then replaces the cavity plate abaculus (4) of different ellipticities；It is locked by fluting tapered end holding screw (9)
After cavity plate abaculus (4), prepare plate, repeat the above steps, carries out hydraulic expanding-forming.
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| CN109708952A (en) * | 2019-01-14 | 2019-05-03 | 山东建筑大学 | A kind of high speed impact forming limit test equipment and method |
| CN110057693A (en) * | 2019-05-08 | 2019-07-26 | 江苏集萃先进金属材料研究所有限公司 | A kind of aluminium alloys for automobile slab forming property testing equipment and method |
| CN110394392B (en) * | 2019-06-12 | 2023-06-13 | 北京机科国创轻量化科学研究院有限公司 | Board forming limit research method based on heat-flow multi-field coupling |
| CN110355256A (en) * | 2019-06-27 | 2019-10-22 | 捷安特(昆山) 有限公司 | Aluminium alloy bicycle frame section tube hydroforming process and its hydroforming die |
| JP7261984B2 (en) * | 2019-09-18 | 2023-04-21 | パナソニックＩｐマネジメント株式会社 | punching equipment |
| CN112570541B (en) * | 2020-11-23 | 2022-05-20 | 飞荣达科技(江苏)有限公司 | Thin plate fluid bulging equipment |
| CN112756464A (en) * | 2020-12-18 | 2021-05-07 | 太原理工大学 | Plate thermal drawing/bulging performance testing device based on universal testing machine |
| CN112845782A (en) * | 2021-01-28 | 2021-05-28 | 浙江理工大学 | Solid particle medium forming method and equipment |
| CN114160615B (en) * | 2021-11-23 | 2023-08-15 | 桂林航天工业学院 | Method for using variable-edge-mode double-curvature bending device |
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| JPS62238033A (en) * | 1986-04-07 | 1987-10-19 | Mitsubishi Heavy Ind Ltd | Deep drawing method for curved surface shaped body |
| DE10153600B4 (en) * | 2001-11-02 | 2005-04-28 | Forschungsges Umformtechnik | Method and apparatus for depth with subsequent hydro-mechanical deep drawing |
| CN101422797A (en) * | 2007-10-31 | 2009-05-06 | 中国科学院金属研究所 | Metal sheet forming method |
| CN104190776B (en) * | 2014-06-25 | 2016-03-09 | 哈尔滨工业大学 | A kind of liquid filling deep-drawing forming method improving large thin-wall curved-surface piece profile precision |
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