CN107971382A - It is a kind of to can be used for panel stiffness mould bulging and the device and method of hydraulic bulge test - Google Patents
It is a kind of to can be used for panel stiffness mould bulging and the device and method of hydraulic bulge test Download PDFInfo
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- CN107971382A CN107971382A CN201711181880.7A CN201711181880A CN107971382A CN 107971382 A CN107971382 A CN 107971382A CN 201711181880 A CN201711181880 A CN 201711181880A CN 107971382 A CN107971382 A CN 107971382A
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- Prior art keywords
- bulging
- cavity plate
- test
- abaculus
- hydraulic
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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
-
- 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
-
- 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
Abstract
It is a kind of to can be used for panel stiffness mould bulging and the device and method of hydraulic bulge test, solve the problems, such as that existing test mould function is single, interchangeability is poor.The present invention can be by varying the installation site of blank holder and die socket, to change the usage of device, for rigid mould bulging and hydraulic bulge test.The cavity plate abaculus that inner ring is different cavity plate diameters can correspondingly be replaced according to the hemispherical head bulging Male Die Size that rigid mould bulging test uses and different sheet metal thicknesses.The needs of sheet metal deformation strain paths according to hydraulic bulge test process, can be changed, replace inner ring as different cavity plate diameters or the cavity plate abaculus of different ellipticities.So as to the hydraulic bulge test for carrying out the panel stiffness mould bulging test of different-thickness with becoming strain paths.Meanwhile the present invention has test mould handling simple, the advantages that adding the flexibility of experiment and the interchangeability of mould, 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 technology
It is to study metal material deformational behavior and the necessary ways of forming defects control to determine material property.Wherein, plate
Forming limit is to reflect the critical performance parameters of material property with material flow stress.Forming limit diagram is by sheet metal
Under strain conditions the figure that forms of attainable ultimate strain value, with reference to numerical simulation technology, available for pre- drafting board
The generation of material forming process defect.The material flow stress obtained for experiment, available for the elastic and plastic properties 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 usually rigid punch-pin can be used to carry out bulging to sheet metal measures forming limit
Figure.Also it can use and combine single drawing experiment and the hydraulic bulge test method measure forming limit diagram of variation ellipse rate cavity plate.Rigid mould
During bulging test, the sample that side plate face is formed with to grid circle is placed between cavity plate and blank holder, and sample is fastened using pressure-pad-force
Material, sample middle part are deformed under the action of punch-pin and form convex closure, and the grid circle on its surface deforms, and works as convex closure
It is upper some locally produce stop when constriction either rupture experiment measure grid circle major axis near constriction or rupture zone with it is short
Shaft size, thus calculates the limiting strain of metal sheet surface.Change experiment sheet metal blank size shape, repeat above-mentioned
Step, to measure the limiting strain under different conditions.According to test bit, shaping limit curve is drawn, you can obtain shaping pole
Limit figure.Draw experiment similar with the method and rigid mould expanding method of the hydraulic bulge test of variation ellipse rate cavity plate with reference to single.Liquid
Constriction or rupture zone grid circle nearby are measured after pressing bulging, limiting strain is calculated.The limit obtained according to singly drawing should
Become, shaping limit curve is drawn in the limiting strain that oval cavity plate hydraulic expanding-forming obtains, so as to obtain forming limit diagram.Both differences
It is the difference to shift gears with bulging mode of strain paths.Rigid mould expanding method is by varying plate shape and size
To change strain paths.And hydraulic expansion method is to change the strain road of sheet metal by varying oval cavity plate ellipticity
Footpath.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 actual feelings of liquid-filling shaping
Condition.Hydraulic expanding-forming biggest advantage is no friction, can fully 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, its breaking strain draws to be unidirectional
2 times or so stretched.By recording fluid pressure and bulging height to calculate material flow stress in experiment.
For the technology characteristics of differing formed method, obtained under selection and the similar process conditions of actual forming process
Material property parameter can more precisely be used for material deformation and the generation of defect for predicting forming process.Rigid mould
The material forming limit that bulging measures, available for techniques such as conventional rigid die drawing Deep formings.Experiment and oval cavity plate are drawn with reference to single
The material forming limit that hydraulic expanding-forming measures, available for the hydraulic pressure assist formation technique such as liquid-filling shaping.
Existing rigid mould expanding die and hydraulic expanding die function are single, 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 according to surveyed sheet metal thickness, it is necessary to change the gap between punch-pin and cavity plate.If necessary to measure not
The material properties such as the forming limit with material different-thickness plate, it is necessary to develop various sizes of test mould respectively.So that examination
Cost increase is tested, test mould use is not convenient enough.
The content of the invention
Insufficient in order to solve existing for above-mentioned test mould, it is an object of the invention to provide a kind of flexibility is good, mould
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 assembling die of bulging test cavity plate diameter.
It is a kind of to include available for panel stiffness mould bulging and the device of hydraulic bulge test：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.Assembling die after assembling mould in a different manner, may be respectively used for 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 hexagon socket cap head screw GB/T 70.1M16 × 50 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 insertion die socket of 102.1mm.By slotting, tapered end holding screw GB/T 71M10 × 40 carry out cavity plate abaculus
It is fixed.Blank holder and flanging transfer block are mutually fixed by hexagon socket cap head screw GB/T 70.1M12 × 30.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 consolidated by hexagon socket cap head screw GB/T 70.1M12 × 45 with press
It is fixed.In blank holder, die socket contact jaw design processing guide groove, the closure of guiding clamping process blank holder and die socket.
When the device is used for hydraulic bulge test, by liquid chamber, die socket, cavity plate abaculus, fluting tapered end holding screw,
Blank holder, flanging transfer block, flanging block, O shapes 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 screw GB/T 70.1M16 × 50 with briquetting.By interior hexagonal cylindrical head
Screw GB/T fixes blank holder and liquid chamber 70.1M12 × 30.Carried out between blank holder and liquid chamber with O shapes rubber seal close
Envelope., 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 insertion die socket.By slotting, cavity plate abaculus is fixed for tapered end holding screw GB/T 71M10 × 40.It is logical
Hexagon socket cap head screw GB/T 70.1M12 × 30 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 the phase of hexagon socket cap head screw GB/T 70.1M10 × 25 with flanging transfer block again
It is fixed.
The cavity plate abaculus of described device can be needed replacing according to use.Cavity plate abaculus outside diameter is all Φ 130mm, and cavity plate is embedding
Block is engaged with the cavity plate abaculus installing blind that die socket is processed., can be according to hemispherical head convex mould diameter, plate during rigid mould bulging
Material thickness, clearance between punch and die, design corresponding cavity plate abaculus internal diameter (i.e. cavity plate diameter).Carrying out the rigidity of different-thickness plate
During mould bulging test, corresponding cavity plate abaculus is only needed to change., equally can be according to different using needs, design during hydraulic expanding-forming
Cavity plate abaculus internal diameter size, carry out hydraulic bulge test.Meanwhile cavity plate abaculus inner ring can be designed to the ellipse of different ellipticities
Toroidal, changes the sheet metal deformation strain paths of hydraulic expanding-forming process with this.It is embedding that experiment process can replace different cavity plates
Block, so as to measure the plate hydraulic expanding-forming limiting strain under differently strained path.
A kind of rigid mould bulging test application method available for panel stiffness mould bulging and the device of hydraulic bulge test,
Specifically comprise the following steps：
Step 1, after the completion of being assembled according to the mould mounting means of rigid mould bulging test, 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 press 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.
Step 4, the punch-pin speed control punch-pin downlink with setting, rigid mould bulging is carried out by sample.Sample constriction ruptures
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 available for panel stiffness mould bulging and the device of hydraulic bulge test, tool
Body includes the following steps：
Step 1, after being assembled according to the mould mounting means of hydraulic bulge test, set hydraulic press related process parameters,
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
Untill upper surface.
Step 3, position bulging plate, is put in blank holder upper surface.And plate is set to be formed with the plate face of strain analysis grid
Recline die socket and cavity plate abaculus.
Step 4, control flanging cylinder downlink, make die socket downlink be molded with blank holder.Sample is compressed with the pressure-pad-force of setting,
Prevent hydraulic expanding-forming process plate from flowing inwards.
Step 5, the liquid chamber pressure progress filling liquid bulging with setting.The numerical value monitored in real time according to liquid chamber pressure, works as bulging
After pressure starts decay, 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, take out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to experiment.
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 accurate 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 is with good effect：
(1) the panel stiffness mould bulging and hydraulic bulge test assembling die, can be by varying blank holder and die socket
Installation site, to change the occupation mode of assembling die, for rigid mould bulging and hydraulic bulge test, so as to enrich mould
The use function of tool.
(2) can be according to the hemispherical head rigid mould bulging Male Die Size and the plate of 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, replace inner ring as different cavity plate diameters or the cavity plate abaculus of 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 experiment and the interchangeability of mould are added, reduces die cost expense
With.
Brief description of the drawings
Fig. 1 is a kind of available for panel stiffness mould bulging and the rigid mould bulging of the device of hydraulic bulge test of the present invention
Mould assembling schematic diagram；
Fig. 2 is a kind of available for panel stiffness mould bulging and the hydraulic expanding-forming mould of the device of hydraulic bulge test of the present invention
Has assembling schematic diagram；
Fig. 3 is a kind of flanging transfer block available for panel stiffness mould bulging and the device of hydraulic bulge test of the present invention
With flanging block structure schematic diagram；
A kind of cavity plate abaculus available for panel stiffness mould bulging and the device of hydraulic bulge test that Fig. 4 is the present invention shows
It is intended to；
Fig. 5 is a kind of available for panel stiffness mould bulging and the rigid mould bulging of the device of hydraulic bulge test of the present invention
Mould and hydraulic expanding die assembling schematic diagram.
In figure：
1- liquid chambers；2- hexagon socket cap head screws；3- die sockets；4- cavity plate abaculus；5- blank holders；6- flanging turns
Connect block；7- hemispherical head bulging punch-pin；8- flanging blocks；9- fluting tapered end holding screws；10-O shape rubber seal；In 11-
Hex screw.
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, it is of the invention a kind of available for panel stiffness mould bulging and the device bag of hydraulic bulge test
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, fluting tapered end holding screw 9, O shapes rubber seal 10, soket head cap screw 11.Assembling die is according to different
Experimental use, after assembling mould in a different manner, may be respectively used for rigid mould bulging test (shown in Fig. 1) and Hydraulic Expansion
Shape is tested (shown in Fig. 2).
Such as Fig. 1, when the assembling die is used for rigid mould bulging test, by liquid chamber 1, die socket 3, cavity plate abaculus 4, is opened
Groove 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 hexagon socket cap head screw GB/T 70.1M16 × 50 and briquetting after connection
On table top.Die socket 3 and liquid chamber 1 are fixed by hexagon socket cap head screw 2.Radially to use gap location fit, axial profit
The mode positioned with 3 central shaft blind hole bottom surface of die socket, die socket 3 is embedded in by the cavity plate abaculus 4 that internal diameter is Φ 102.1mm.It is logical
Cross 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
Footpath, therefore by that to 4 inner diameter edge of cavity plate abaculus to the cavity plate abaculus bottom surface applying power between 3 through hole of die socket, can facilitate
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 fillister head screw is fixed.So as to which pumping for flanging cylinder drives blank holder 5 to move up and down.Hemispherical head bulging is convex
Mould 7 is fixed by hexagon socket cap head screw GB/T 70.1M12 × 45 and press master cylinder shaft end.In blank holder 5, die socket 3
Contact jaw design, processing guide groove, the closure of guiding clamping process blank holder 5 and die socket 3.
Such as Fig. 2, when the assembling die is used for hydraulic bulge test, by liquid chamber 1, die socket 3, cavity plate abaculus 4, slots
Tapered end holding screw 9, blank holder 5, flanging transfer block 6, flanging block 8, O shapes rubber seal 10, hexagon socket cap head screw 2 etc.
It is assembled.Liquid chamber is fixed on press bed by hexagon socket cap head screw GB/T 70.1M16 × 50 and briquetting after connection
On face.Blank holder 5 and liquid chamber 1 are fixed by hexagon socket cap head screw 2.O shape rubber seals are used between blank holder 5 and liquid chamber 1
Circle 10 is sealed., can be to liquid chamber filling liquid after hydraulic system pipeline is connected with the pouring orifice at 1 left end of liquid chamber.Radially to adopt
It is with the mode of gap location fit, the axial mode using the positioning of 3 central shaft blind hole bottom surface of die socket that the cavity plate of bulging is embedding
Block 4 is embedded in die socket 3.By slotting, cavity plate abaculus 4 is fixed 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 phase of hexagon socket cap head screw GB/T 70.1M10 × 25 again.So as to flanging cylinder
Pump and drive die socket 3 to move up and down.
The cavity plate abaculus 4 of the assembling die can be needed replacing according to use.4 outside diameter of cavity plate abaculus is all Φ 130mm,
Cavity plate abaculus 4 is engaged with the cavity plate abaculus installing blind that die socket 3 is processed., can be according to hemisphere alliteration during rigid mould bulging
Diameter, sheet metal 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
During the rigid mould bulging test of row different-thickness plate, only corresponding cavity plate abaculus 4 need to be replaced according to sheet metal thickness.Hydraulic Expansion
During shape, it can equally design the internal diameter size of different cavity plate abaculus 4 according to using needs, 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.Experiment process can replace different cavity plate abaculus 4, so as to measure the plate hydraulic pressure under differently strained path
Bulging limiting strain.
A kind of rigid mould bulging test application method available for panel stiffness mould bulging and the device of hydraulic bulge test,
Specifically comprise the following steps：
Step 1, after the completion of being assembled according to the mould mounting means of rigid mould bulging test as shown in Figure 1, control hydraulic pressure
Machine, trouble free service height is up to by blank holder 5 and hemispherical head bulging punch-pin 7.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 press 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.
Step 4,7 downlink of punch-pin speed control hemispherical head bulging punch-pin with setting, rigid mould bulging is carried out by sample.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, such as carry out the panel stiffness mould bulging test of different-thickness, it is necessary to change cavity plate diameter, then unclamps fluting
Tapered end holding screw 9, former cavity plate abaculus 4 is taken out, and replaces corresponding cavity plate abaculus 4, is tightened fluting tapered end holding screw 9 and is carried 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
Experiment, then repeat the above steps and carry out the rigid mould bulging test of other samples.
A kind of hydraulic bulge test application method available for panel stiffness mould bulging and the device of hydraulic bulge test, tool
Body includes the following steps：
Step 1, after being assembled according to the mould mounting means of hydraulic bulge test as shown in Figure 2, set hydraulic press phase
Close technological parameter, setting hydraulic expanding-forming liquid chamber pressure, pressure-pad-force.
Step 2, control hydraulic press workbench, make pressurized cylinder backhaul, while toward 1 fluid infusion of liquid chamber, until liquid reaches flanging
Untill enclosing 5 upper surfaces.
Step 3, position bulging plate, is put in 5 upper surface of blank holder.And plate is set 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, make 3 downlink of die socket be molded with 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, the liquid chamber pressure progress filling liquid bulging with setting.The numerical value monitored in real time according to liquid chamber pressure, works as bulging
After pressure starts decay, 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, take out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to experiment.
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.Cavity plate abaculus 4 is locked by holding screw 9
Afterwards, prepare plate, repeat the above steps, carry out hydraulic expanding-forming.
Claims (4)
- It is 1. a kind of available for panel stiffness mould bulging and the device and method of hydraulic bulge test, it is characterised in that the dress Put including：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 punch-pin (7), flanging block (8), fluting tapered end holding screw (9), O shapes rubber seal (10), interior hexagonal 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；During 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；, can be to liquid chamber filling liquid after hydraulic system pipeline is connected with the pouring orifice at liquid chamber (1) left end； The passage extreme lower position of pouring orifice and liquid chamber (1) lumen contact is slightly below the inner chamber bottom surface of liquid chamber (1)；Justified by six interior hexagonals 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 connected with liquid chamber (1), flanging transfer block (6) It is identical；In a manner of radially using gap location fit, the axial positioning using die socket (3) central shaft blind hole bottom surface, by cavity plate The embedded die socket (3) of abaculus (4)；By slotting, cavity plate abaculus (4) is fixed tapered end holding screw (9)；Cavity plate abaculus (4) Internal diameter is less than die socket (3) central shaft through-hole diameter；Flanging block (8) central axle threads hole and the flanging cylinder rod end screw thread phase of press Connection；Flanging block (8) is mutually fixed with flanging transfer block (6) by hexagon socket cap head screw (11) again.
- 2. a kind of device and method available for panel stiffness mould bulging and hydraulic bulge test according to claim 1, It is characterized in that, cavity plate abaculus (4) can be needed replacing according to use；Cavity plate abaculus (4) outside diameter is all Φ 130mm, and cavity plate is embedding Block (4) is engaged with the cavity plate abaculus installing blind that die socket (3) is processed；, can be according to hemispherical head bulging during rigid mould bulging Diameter, sheet metal thickness, the clearance between punch and die of punch-pin (7), design the internal diameter (i.e. cavity plate diameter) of corresponding cavity plate abaculus (4)； When carrying out the rigid mould bulging test of different-thickness plate, only corresponding cavity plate abaculus (4) need to be replaced according to sheet metal thickness；Liquid When pressing bulging, it can equally design the internal diameter size of different cavity plate abaculus (4) according to using needs, carry out hydraulic expanding-forming examination Test；Meanwhile the inner ring of cavity plate abaculus (4) can be designed to the elliptical shape of different ellipticities, hydraulic expanding-forming mistake is changed with this The sheet metal deformation strain paths of journey；Experiment process can replace different cavity plate abaculus (4), so as to measure under differently strained path Plate hydraulic expanding-forming limiting strain.
- A kind of 3. rigid mould that can be used for panel stiffness mould bulging and the device of hydraulic bulge test using described in claim 1 Bulging test application method, it is characterised in that this method specifically includes following steps：Step 1, according to rigid mould bulging test mould mounting means assembling after the completion of, 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 that sample is formed with strain analysis grid is set to recline die socket (3) and cavity plate abaculus (4)；The hydraulic press test parameters such as step 2, setting pressure-pad-force, punch-pin speed, control load；Step 3, control blank holder (5) downlink, mold with die socket (3), compress sample, prevent Bulging Process plate from flowing inwards It is dynamic；Step 4, punch-pin speed control hemispherical head bulging punch-pin (7) downlink with setting, rigid mould bulging is carried out by sample；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, such as carry out the panel stiffness mould bulging test of different-thickness, it is necessary to change cavity plate diameter, then unclamps fluting tapered end Holding screw (9), former cavity plate abaculus (4) is taken out, replaces corresponding cavity plate abaculus (4), 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 repeat the above steps and carry out the rigid mould bulging test of other samples.
- A kind of 4. Hydraulic Expansion that can be used for panel stiffness mould bulging and the device of hydraulic bulge test using described in claim 1 Shape tests application method, it is characterised in that this method specifically includes following steps：Step 1, after being assembled according to the mould mounting means of hydraulic bulge test, set hydraulic press related process parameters, setting 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) untill upper surface；Step 3, position 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, make die socket (3) downlink be molded with 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, the liquid chamber pressure progress filling liquid bulging with setting；The numerical value monitored in real time according to liquid chamber pressure, when bulging pressure After starting decay, 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, take out hydraulic expanding-forming sample, is needed to carry out measurement of correlation according to experiment；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；As needed Change sheet metal deformation strain paths, then replace the cavity plate abaculus (4) of different ellipticities；Cavity plate abaculus is locked by holding screw (9) (4) after, prepare plate, repeat the above steps, carry out hydraulic expanding-forming.
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| 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 |
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| 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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