CN206455041U - A kind of Tube Hydroforming machine of bulging pressure fluctuation loading - Google Patents
A kind of Tube Hydroforming machine of bulging pressure fluctuation loading Download PDFInfo
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Abstract
The utility model is related to a kind of Tube Hydroforming machine of bulging pressure fluctuation loading, electrohydraulic servo valve control pressurized cylinder is first passed through linearly to be pressurized, move back and forth to form fluctuation pressure by servomotor and ball-screw driving pulsation cylinder piston rod again, back and forth retreated not against host computer system pressure change or pressurized cylinder and form fluctuation pressure, it is to avoid unstable state caused by the fluctuation of system pressure or the high frequency flutter of pressurized cylinder；Bulging pressure conventional linear is loaded when can realize internal high pressure forming, sinusoidal pulsation wave is loaded, triangle pulsation wave is loaded, four kinds of modes of the loading of rectangle pulsation wave and the above combine loading at times, and the fluctuating frequency of pressure and amplitude are adjustable within the specific limits, the technique scope of application of equipment is expanded, the forming quality of product is improved.
Description
Technical field
The present invention relates to a kind of internal high-pressure forming machine, particularly a kind of Tube Hydroforming of bulging pressure fluctuation loading
Machine.
Background technology
Hydroforming technology is for producing a kind of advanced, special, accurate of complex section thin-wall metal component
The net forming technique of (half accurate), be one kind realize component structural integration and it is light-weighted it is advanced wait material manufacturing technology, have
Have that cost is low, process is few, light weight, high intensity the features such as, be widely used in the fields such as aviation, automobile, household electrical appliances.Such as aviation hair
The many oil pipes of motivation, blast pipe, subframe, the chassis of automobile etc., the branched copper pipe in air-conditioning, with inside high-pressure forming method by
Gradually substitute conventional method shaping.The typical process flow of this technology is:Embryo material is pre-processed first, then pipe is put
In correct position in lower mould, upper mould closes locked mode；Axial feed cylinder driving drift seals the end of pipe, while drift topping up hole
The liquid shaping medium of middle discharge drains inner air tube；The drift at subsequent two ends feeds feed supplement simultaneously, while interior pressure increases；
Under the synergy of pressure and axial thrust, pipe is adjacent to dies cavity and the component of complicated shape needed for being configured to；Shape
Pressure release is retracted into back punching head, workpiece is taken out in upper mould die sinking.
Load path is often referred to the matching relationship of axial feeding and bulging pressure in forming process.Load path is internally high
Pressing formation product quality has a major impact, and rational load path can significantly increase the forming property of material, it is to avoid or reduce
Product flexing, rupture, corrugation etc..Existing internal high-pressure forming machine bulging pressure-loaded mode is generally linear loading.Day in 2001
This scholar T Rikimaru research discoveries, can if making the forming pressure inside tubing by certain pulse mode circulation change
Enough bulging amounts are obtained with smaller pressure, and make deformation more uniform, the generation of rupture can be delayed.The new technology is referred to as
Tubing pulse hydraulic forming technique, the country's also referred to as fluctuation loading hydroforming technology.The technology one it has been observed that cause immediately
The research interest of lot of domestic and foreign scholar.Foreign countries Japan Feng Qiao technological sciences university Mori professors, the Hama of Waseda University
Professor, the Yang Lianfa professors, the Zhang Shihong researcher of Shenyang Inst. of Metals, Chinese Academy of Sciences of domestic Guilin Electronic Science and Technology Univ.
Etc. having carried out correlative study.The research of Japanese Mori professors finds under pulsation load mode that tubing can be produced in forming process
Small wrinkle, and wrinkle have be iteratively produced, it is swollen flat the characteristics of so that pipe deformations area wall thickness change evenly, can be effective
Prevent the generation of product rupture, therefore improve forming tubular product performance.Guilin Electronic Science and Technology Univ. professor Yang Lianfa is to pulse hydraulic
The plastic forming process of the lower stainless steel tube of loading is studied, and is as a result shown：When the time is certain, with the fluctuating frequency of pressure
Increase, the Thickness Distribution of tubing is more uniform, and the fillibility of mould is better.
Research equipment used in above scholar, is nearly all to install pulse hydraulic generation additional on traditional internal high-pressure forming machine
Device, or make easy pulse hydraulic forming test device by oneself.At present, rarely has the interior height that bulging pressure fluctuation is loaded both at home and abroad
Pressing formation machine.Chinese patent CN102182728A discloses a kind of production method of fluctuation pressure, and this method is in closed liquid
In body cavity volume, by setting the linear pressurization for linear motion of a piston, the reciprocating generation fluctuation pressure of another piston
Mode obtain default fluctuation pressure.This method is simple and easy to apply, and required equipment cost is relatively low, but this method is without detailed public
It is how to control two pistons to be moved by predetermined rule to open, and this method is only applicable to the experimental study of mesolow power, no
Suitable for higher bulging pressure, the internal high-pressure forming machine of higher automaticity.Chinese patent CN102451868A discloses one kind
The hydraulic forming method of wave type internal-pressure-controlled loading mode, this method relies on Wave type Oil-source control internal pressure, shapes and meets
It is required that product, processing range include Tube Hydroforming, housing hydraulic shaping, sheet metal hydroforming, Oil-source control loading side
Formula is sine wave, square wave, triangular wave or composite wave-shape.But the patent only proposes Wave type internal pressure load mode, does not have
It is related to specific pressure fluctuation loading internal high pressure forming equipment, also the undisclosed mechanism of production for how implementing fluctuation pressure
With control mode.Chinese patent CN202123142U discloses a kind of extra high pressure system for realizing hydraulic forming of pipes in fluctuated loading, and this is
System can realize shaping pressure oscillation loading, and good sealing effect, forming efficiency are high.The patent is by PID controller control
The oil pressure relief of pilot proportional electromagnetic relief valve processed, and pressure fluctuation is realized by pressure sensor closed loop feedback control, press
Power linear loading is realized simultaneously with pulsation loading.But this system boost cylinder low pressure oil input end pressure is constantly fluctuated, and causes system
Pressure it is unstable；Common pilot proportional electromagnetic relief valve dynamic property is difficult to reach dither requirement, during with duration
Between overflow cause energy utilization efficiency relatively low.Meanwhile, the patent only discloses pulsation loading hydraulic system, to whole set equipment
Not yet explicitly illustrate.
The content of the invention
The purpose of the present invention is can only to realize bulging pressure linear loading to solve existing internal high-pressure forming machine, it is impossible to real
The problem of existing pulse mode is loaded, and then propose a kind of with the loading of electrohydraulic servo valve control pressurized cylinder conventional linear, with servo electricity
The combined type that machine driving hydraulic cylinder reciprocating motion of the pistons produces fluctuation pressure loads middle-size and small-size internal high-pressure forming machine.
The present invention adopts the technical scheme that to solve the above problems：
A kind of Tube Hydroforming machine of bulging pressure fluctuation loading of the present invention, including：Entablature, guide pillar, fast cylinder,
Master cylinder, moved cross beam, upper mould, axial feed the cylinder drift consistent with quantity therewith, workbench, frame, lower mould, lower cylinder, electrically
Switch board, PLC, servo-driver, multiple buttons switch, control panel, touch-screen, low pressure hydromechanical system, host hydraulic system,
System oil pipe, pressurized cylinder, pressure transmitter, pulse hydraulic generation device, high-pressure water pipe and pressure transmitter；
The pulse hydraulic generation device includes：Servomotor, leading screw, ball, nut, sunk screw, adpting flange, arteries and veins
Dynamic cylinder piston rod, pulsation cylinder cylinder body, inlet high pressure check valve, pressure transmitter, stop valve and liquid outlet high pressure check valve.Watch
Motor is taken to be fixedly connected with leading screw；Leading screw, many balls, nuts collectively form ball-screw-transmission pair；Nut base circumference is equal
The even multiple through holes of distribution, adpting flange circumference correspondence position is also distributed the through hole of identical quantity, passes through the countersunk head spiral shell of respective amount
Nail connects the two；Pulsation cylinder piston rod upper end is fixedly connected with adpting flange, lower end and cylinder body formation variable volume cavity；Cylinder body
Both sides connect high pressure check valve respectively, control highly pressurised liquid one-way flow；Pulse hydraulic cylinder liquid outlet passes through stop valve and pressure
Transmitter is connected；
The host hydraulic system includes：Main sump, main motor, remote pressure regulating valve, constant pressure variable displacement pump, system overflow
Valve, at least one accumulator, electrohydraulic servo valve, two-position four-way solenoid directional control valve and pressure gauge, main sump are equipped with hydraulic oil, main
Motor is connected by shaft coupling with constant pressure variable displacement pump；The oil inlet of constant pressure variable displacement pump is connected with fuel tank, oil-out to system four-way
Connect first interface；Four-way connection the other three interface respectively with accumulator, the oil inlet P of electrohydraulic servo valve, main frame other oil
Road is connected；A, B hydraulic fluid port of electrohydraulic servo valve correspond to be connected with P, T hydraulic fluid port of solenoid directional control valve respectively；A, B oil of solenoid directional control valve
Mouth corresponds to be connected with middle part hydraulic fluid port, the end hydraulic fluid port of pressurized cylinder respectively；
The low pressure hydromechanical system includes：High pressure check valve, overflow valve, topping up motor, charging pump, filter and water tank,
Shaping liquid medium is housed in water tank；Low pressure and mass flow charging pump inlet installs filter, and liquid outlet quickly fills to pressurized cylinder
Liquid；Overflow valve makees hydromechanical system safety valve, and high pressure check valve prevents the highly pressurised liquid in pressurized cylinder from reversely flowing into low pressure charging pump.
The cylindrical guides are 4, are each passed through four holes of moved cross beam correspondence, upper end is fixedly connected with entablature,
Lower end is fixedly connected with workbench；Master cylinder is major diameter plunger case, and two fast cylinders are symmetrically distributed in the master cylinder left and right sides；It is main
Cylinder, the cylinder body of two fast cylinders are fixedly connected on entablature lower surface, and master cylinder plunger piston bar, fast cylinder piston-rod end are fixedly connected
In moved cross beam upper surface；Upper mould upper surface is fixedly connected in the middle part of moved cross beam lower surface, and lower mould is fixed on workbench upper end
Face and upper mould correspondence position；Axial feed cylinder is two or three, is separately fixed at that workbench is left and right, rear side, the 3rd fixation
In rear side, drift is connected horizontally in its piston rod end face；Workbench is fixed in frame, and lower cylinder is arranged in frame；
The control panel is fixedly connected on entablature, and touch-screen is respectively mounted in the inner with button switch；Electrical control
Cabinet is fixedly connected on the right side of frame, and PLC (module containing AD/DA) is mounted on inside it with servo-driver；
The pressurized cylinder is fixedly connected on the right side of frame, its hydraulic fluid port of low pressure chamber two, passes through system oil pipe and main unit hydraulic system
System connection, its high pressure chest inlet is connected by high-pressure water pipe with low pressure hydromechanical system, and its liquid outlet passes through high-pressure water pipe and arteries and veins
Hydrodynamic pressure generation device is connected；Pressure transmitter is inserted at pressurized cylinder liquid outlet；The liquid outlet of pulse hydraulic generation device with
Liquid-through hole in drift is connected by high-pressure water pipe；
The button switch, touch-screen, low pressure hydromechanical system, host hydraulic system, pulse hydraulic generation device and pressure
Transmitter is connected by cable and PLC input or output interface respectively；The input of servo-driver is defeated with PLC by cable
Outgoing interface is connected, and its output end is connected with the servomotor in pulse hydraulic generation device；
The touch-screen can be manually entered Pressure of Tube Hydroforming loading procedure, the linear loading section of pressure and pulsatile portion
Independent input parameter；Program parameter controls each system and component actuation respectively by PLC processing；Electric signal inputs electro-hydraulic servo
Valve, the feeding of pressurized cylinder is controlled by controlling the flow of servo valve；The liquid shaping medium of low pressure hydromechanical system supplement passes through
Pressurized cylinder pressurization flows into pulse hydraulic generation device, through the piston rod iterative motion pressurization shape in pulse hydraulic generation device
Into pressure fluctuation, tubing is finally flowed into.Pressurized cylinder port of export inserting pressure transmitter detection pressure, and be telecommunications by pressure conversion
In number feed back input PLC, the semiclosed loop for passing through the PID controller formation pressure in PLC is adjusted.
The beneficial effects of the invention are as follows：
1st, middle-size and small-size internal high-pressure forming machine of the present invention can realize the bulging pressure conventional linear during shaping
Loading, the loading of sinusoidal pulsation wave, the loading of triangle pulsation wave, the loading of rectangle pulsation wave and four kinds of load modes group at times above
Box-like loading, expands the forming technology scope of application of equipment, improves the forming quality of product.
2nd, the frequency and amplitude of middle-size and small-size internal high-pressure forming machine fluctuation pressure of the present invention are interior continuous in a big way
It is adjustable, and the separate adjustment of two parameter.
Pressure pulsation device set by 3 present invention uses independent electrical control, the fluctuation independent of main system pressure
Or the small size flutter of pressurized cylinder forms pressure fluctuation, improves the stability of a system.
4th, the present invention is using PLC, servo-driver control servomotor formation pressure fluctuation, and simple in construction, cost is relative
Relatively low, O＆M is more convenient.
4th, internal high-pressure forming machine host hydraulic system of the present invention uses constant pressure variable displacement pump and accumulator to combine conduct
Power source, it is ensured that the stabilization of host hydraulic system pressure, reduces motor installed power, improves energy utilization efficiency.
Brief description of the drawings
Fig. 1 is main machine structure schematic diagram of the invention；
Fig. 2 is main frame matched moulds view of the present invention；
Fig. 3 is hydraulic system principle figure of the invention；
Fig. 4 is bulging Stress control flow chart of the invention；
Fig. 5 is pressurized cylinder internal structure schematic diagram of the invention；
Fig. 6 is pulse hydraulic generation device internal structure schematic diagram of the invention；
Fig. 7 loads contrast curve for the bulging pressure sinuous pulsation loading of the present invention with conventional linear；
Fig. 8 loads contrast curve for the forming pressure rectangle pulsation loading of the present invention with conventional linear；
Fig. 9 loads contrast curve for the forming pressure triangle pulsation loading of the present invention with conventional linear；
In figure：1. entablature；2. guide pillar；3. fast cylinder；4. master cylinder；5. moved cross beam；6. on mould；7. drift；8. axially
Feed cylinder；9. workbench；10. frame；11. lower mould；12. lower cylinder；13. electrical control cabinet；14.PLC (module containing AD/DA)；15.
Servo-driver；16. button switch；17. control panel；18. touch-screen；19. low pressure hydromechanical system；20. host hydraulic system；
21. system oil pipe；22. pressurized cylinder；23. pulse hydraulic generation device；24. high-pressure water pipe；25. pressure transmitter；26. tubing；
27. main sump；28. main motor；29. remote pressure regulating valve；30. constant pressure variable displacement pump；31. overflow valve；32. accumulator；33. it is electro-hydraulic
Servo valve；34. two-position four-way solenoid directional control valve；35. pressure gauge；36. high pressure check valve；37. overflow valve；38. topping up motor；
39. low-lift pump；40. filter；41. water tank；42. liquid outlet；43. inlet；44. high pressure chest；45. middle part hydraulic fluid port；46. piston
Bar；47. cylinder body；48. end hydraulic fluid port；49. servomotor；50. screw mandrel；51. ball；52. nut；53. sunk screw；54. connect
Acting flange；55. cylinder piston rod of pulsing；56. cylinder cylinder body of pulsing；57. inlet high pressure check valve；58. pressure transmitter；59. section
Only valve；60. liquid outlet high pressure check valve.
Wherein：Part 27-35 constitutes the host hydraulic system 20 in Fig. 1, and part 36-41 constitutes the low pressure topping up in Fig. 1
In system 19, Fig. 3, in addition to being water tank with the icon that overflow valve 37 is connected, it is main sump 27 that other, which do not mark fuel tank icon,.
Embodiment
As described below is only presently preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc., such as axial feed cylinder increases as 3 or more, changes
Master cylinder clamping system, change pressurized cylinder, the quantity and size of pulse hydraulic cylinder, the specification of servomotor etc., it should be included in this
Within the protection domain of invention.
Embodiment 1：
The present embodiment is that bulging pressure conventional linear loads internal high pressure forming, illustrates present embodiment with reference to Fig. 1-6.
A kind of Tube Hydroforming machine of bulging pressure fluctuation loading of the present invention, including：Entablature 1, four guide pillars 2,
Two fast cylinders 3, master cylinder 4, moved cross beam 5, upper mould 6, two (or three) axial feed cylinder 8 drifts consistent with quantity therewith
7th, workbench 9, frame 10, lower mould 11, lower cylinder 12, electrical control cabinet 13, PLC (module containing AD/DA) 14, servo-driver 15,
Multiple buttons switch 16, control panel 17, touch-screen 18, low pressure hydromechanical system 19, host hydraulic system 20, system oil pipe 21,
Pressurized cylinder 22, pulse hydraulic generation device 23, high-pressure water pipe 24, pressure transmitter 25.
The pulse hydraulic generation device 23 includes：Servomotor 49, leading screw 50, many balls 51, nut 52, Duo Gechen
Head screw 53, adpting flange 54, pulsation cylinder piston rod 55, pulsation cylinder cylinder body 56, inlet high pressure check valve 57, pressure transmitter
58th, stop valve 59, liquid outlet high pressure check valve 60.The servomotor 49 is fixedly connected with leading screw 50；Leading screw 50, many balls
51st, the composition of nut 52 ball-screw-transmission pair；The base even circumferential of nut 52 is distributed multiple through holes, adpting flange circumference correspondence position
The through hole for being also distributed identical quantity is put, the two is connected by the sunk screw 53 of respective amount；Pulsation cylinder piston rod 55 upper end
Portion is fixedly connected with adpting flange 54, lower end and the formation variable volume cavity of cylinder body 56；The both sides of cylinder body 56 connect high pressure check valve respectively
57 and 60, control highly pressurised liquid one-way flow；Pulse hydraulic cylinder liquid outlet connects connection pressure on stop valve 59, stop valve 59 and become
Send device 58.
The host hydraulic system 20 includes：Main sump 27, main motor 28, remote pressure regulating valve 29, constant pressure variable displacement pump 30,
System overflow valve 31, at least one accumulator 32, electrohydraulic servo valve 33, two-position four-way solenoid directional control valve 34, pressure gauge 35.Main frame
Fuel tank 27 is equipped with hydraulic oil, and main motor 28 is connected by shaft coupling with constant pressure variable displacement pump 30；The oil inlet of constant pressure variable displacement pump 30 connects
Fuel tank 27, oil-out to first interface of system four-way pipe connector；Four-way union the other three interface respectively with accumulator 32, electricity
The oil inlet P of hydraulic servo 33, main frame other oil circuits connection；A, B hydraulic fluid port of electrohydraulic servo valve 33 are corresponded to and electromagnetic switch respectively
P, T hydraulic fluid port connection of valve 34；A, B hydraulic fluid port of solenoid directional control valve 34 correspond to middle part hydraulic fluid port 45, the end oil with pressurized cylinder 22 respectively
Mouth 48 is connected.
The low pressure hydromechanical system 19 includes：High pressure check valve 36, overflow valve 37, topping up motor 38, charging pump 39, filtering
Device 40, water tank 41.Shaping liquid medium is housed in water tank 41；The inlet of low pressure and mass flow charging pump 39 installs filter 40, goes out
Liquid mouthful is to the quick topping up of pressurized cylinder 22；Overflow valve 37 makees hydromechanical system safety valve, and high pressure check valve 36 is prevented in pressurized cylinder 22
Highly pressurised liquid reversely flows into low pressure charging pump 39.
Four cylindrical guides 2 are through four holes of the correspondence of moved cross beam 5, and upper end is fixedly connected with entablature 1, lower end
It is fixedly connected with workbench 9；The master cylinder 4 is major diameter plunger case, and two fast cylinders 3 are symmetrically distributed in the left and right sides of master cylinder 4；
Master cylinder 4, the cylinder body of two fast cylinders 3 are fixedly connected on the lower surface of entablature 1, and master cylinder plunger piston is fixed with fast cylinder piston-rod end
It is connected to the upper surface of moved cross beam 5；The upper surface of upper mould 6 is fixedly connected in the middle part of the lower surface of moved cross beam 5, and lower mould 11 is fixed
In the upper surface of workbench 9 and the upper correspondence position of mould 6；Described two or three axial feed cylinders 8 be fixed on workbench 9 it is left and right, after
Side (the 3rd is fixed on rear side), drift 7 is connected horizontally in its piston rod end face；The workbench 9 is fixed in frame 10,
Lower cylinder 12 is arranged in frame 10；
The control panel 17 is fixedly connected on the right side of entablature 1, and touch-screen 18 is respectively mounted in the inner with button switch 16；
Electrical control cabinet 13 is fixedly connected on the right side of frame 10, and PLC (module containing AD/DA) 14 is respectively mounted in the inner with servo-driver 15
Portion；Pressurized cylinder 22 is fixedly connected on the right side of frame, and its hydraulic fluid port 45,48 of low pressure chamber two passes through system oil pipe 21 and host hydraulic system
20 connections, its high pressure chest inlet 43 is connected by high-pressure water pipe 24 with low pressure hydromechanical system, and its liquid outlet 42 passes through water under high pressure
Pipe is connected with pulse hydraulic generation device 23；Pressure transmitter 25 is inserted at pressurized cylinder liquid outlet 42；Pulse hydraulic produces dress
The liquid outlet for putting 23 is connected with the liquid-through hole in drift 7 by high-pressure water pipe 24；
The button switch 16, touch-screen 18, low pressure hydromechanical system 19, host hydraulic system 20, pulse hydraulic produce dress
23 are put to be connected by cable and PLC14 input or output interface respectively with pressure transmitter 25；The input of servo-driver 15
End is connected by cable with PLC output interfaces, and its output end is connected with the servomotor 49 in pulse hydraulic generation device；
The touch-screen 18 can be manually entered Pressure of Tube Hydroforming loading procedure, pressure conventional linear loading section and arteries and veins
Pulse free loading parameter in dynamic loading section independent input parameter, the present embodiment；Program parameter is controlled respectively by PLC14 processing
Make each system and component actuation；Electric signal inputs electrohydraulic servo valve 33, and pressurized cylinder 22 is controlled by controlling the flow of servo valve
Feeding；The liquid shaping medium that low pressure hydromechanical system 19 is supplemented flows into pulse hydraulic generation device by the pressurization of pressurized cylinder 22
23；Piston rod locking in pulse hydraulic generation device 23 is motionless, and high-pressure forming medium finally flows into tubing 26.Pressurized cylinder 22 goes out
Mouthful end inserting detection pressure of pressure transmitter 25, and pressure conversion is electric signal feed back input PLC14, by PLC
The half-closed loop control of PID controller formation pressure.
In the present embodiment, the linear function that interior pressure changes with the load time is：
P0(t)=10t (0≤t<5)；
P0(t)=25t-75 (5≤t<15)；
P0(t)=300 (15≤t≤20).
Before processing, input forming process is as shown in the table in touch-screen 18：
In upper table, time point is the starting point or turning point that interior pressure line is loaded；Pressure is the bulging pressure at the moment；
Pulse mode is：0 pulse free, 1 sinusoidal pulsation wave, 2 rectangle pulsation waves, 3 triangle pulsation waves；Amplitude h is correspondence moment pulsation cylinder
The amplitude of the back and forth movement of piston rod 46, frequency is the reciprocating frequency of piston rod 46.
Then, the tubing 26 of pretreatment is placed in the lower correct position of mould 11, the corresponding button pressed in control panel 17 is opened
Close 16 and start semi-automatic forming, the first fast downlink of the driving of master cylinder 4 moved cross beam 5 switchs to close at a slow speed when supreme mould 6 is close to lower mould 11
Mould；The rapid axial of axial feed cylinder 8 position, at the same time hydromechanical system motor 38 starts, pump 39 discharge low pressure shaping liquid according to
It is secondary after pressurized cylinder 22 and pulse hydraulic generation device 23, the liquid-through hole into drift 7；Axial feed cylinder navigates to predetermined
Each end of sealed tube 26 behind position, and drain its internal air；Subsequent axial feed cylinder 8 switchs to feed at a slow speed, and according to
Setting program is fed；Initial time is fed, the high pressure chest 44 of pressurized cylinder 22 is in maximum volume state and full of low pressure liquid；
Main motor 28 drives constant pressure variable displacement pump 30 to provide power for hydraulic system, and PLC14 controls electrohydraulic servo valve 33 according to setting program
Valve element movement, while the valve element of reversal valve 34 be in right position connect, hydraulic oil from hydraulic fluid port 38 enter the low pressure chamber of pressurized cylinder 22, promotion
Piston rod 46 is moved to the side of high pressure chest 44；Pulse hydraulic generation device 23 is flowed successively through after shaping liquid supercharging in high pressure chest 44
In check valve 57,60, now servomotor 49 be in stopped status, do not produce fluctuation pressure；Highly pressurised liquid is eventually through punching
Topping up hole in first 7 enters inside tubing 26, tubing 26 is adjacent in upper mould 6 and lower mould 11 under the cooperation of axial feed
Wall, shapes required shapes.
In this forming process, the output pressure of constant pressure variable displacement pump 30 can be controlled by adjusting the pressure of remote pressure regulating valve 29
Power；The control main frame hydraulic system maximum pressure of overflow valve 31, plays pressure limiting safety effect；Accumulator 32 is inhaled in host work gap
Hydraulic oil is received, high-volume hydraulic oil is quickly mended to electrohydraulic servo valve 33 when forming pressure rises very fast, reduces the dress of motor 28
Machine rated power；Pressure gauge 35 can show the pressure of the low pressure chamber of pressurized cylinder 22 in real time, be easy to device operator real-time monitored to monitor
Forming process；Pressure transmitter 25 gathers the pressure of the high pressure chest liquid outlet 42 of pressurized cylinder 22 in real time, and is converted to electric signal feedback
Into PLC14, pressure closed loop feedback control is formed, in real time the valve element movement of control electrohydraulic servo valve 33；Simultaneously on touch-screen 18
The change of display bulging pressure in real time；High pressure check valve 36 prevents high-pressure forming liquid reverse reflux to low pressure charging pump 39.
After the completion of internal high pressure forming program is performed, axial feed cylinder 8 quickly retracts initial position, the pressure release of tubing 26, quickly
The driving moved cross beam 5 fast uplink die sinking of cylinder 3, finally takes out the tubing 26 of shaping, is ready for next component shaping.
Embodiment 2：
The present embodiment is that bulging pressure sinuous pulsation loads internal high pressure forming, illustrates present embodiment with reference to Fig. 1-7.
In the present embodiment, interior pressure loading curve function is：
P1(t)=P0(t)+ΔP·sin(2πω·t)。
In formula, P0(t) it is the conventional linear loading curve in embodiment 1, Δ P is pulsation wave-amplitude, the present embodiment takes
5MPa；ω is to take 1Hz in ripple frequency, the present embodiment.
Unlike compared with Example 2, pulsation load mode selection 1, amplitude h needs to survey manually before part forming
It is fixed.Because of the pressure that system feedback control conventional linear is loaded, fluctuation pressure part opened loop control, input program is lived for pulsation cylinder
Stopper rod amplitude h, rather than fluctuating pressure amplitude Δ P.Known shaping medium fluid mechanical attribute, pulsation cylinder, high-pressure water pipe, tubing chi
It is very little etc., the corresponding piston rod amplitude h of amplitude Δ P can be calculated by theory deduction, but as it is assumed that excessive, there is leakage in system
Deng uncontrollable factor, cause the presence of larger error.Therefore relatively it is defined by determining pulsation cylinder piston rod amplitude manually in equipment
Really.
The present invention is middle-size and small-size internal high-pressure forming machine, pressure fluctuation amplitude Δ P is constant, pressure controling precision requirement not
In the case of height, constant amplitude h values can be set.If being found after shaping, pressure amplitude Δ P attenuation amplitudes exceed required pressure
Control accuracy, the then real-time pressure value that can be recorded by contrasting on touch-screen 18 is mended to pulsation cylinder piston rod amplitude h
Repay, day part starting point sets different amplitudes, system is automatically determined often according to the h values of initial time according to linear interpolation method
The piston rod amplitude of one pulsation period.
Determining the method for the pulsation amplitude of cylinder piston rod 46 manually is：Set device is operation shape manually in touch-screen 18
State；Pressing the corresponding button switch 16, control master cylinder 4 matched moulds, drift 7 are quickly positioned manually；The control supercharging manually on touch-screen 18
The crawl of cylinder 22 is pressurized, in the case of ensureing that fracture failure does not occur for tubing (pressure has mutation when tubing ruptures), by theoretical calculation
Touch-screen is inputted on the basis of the h values drawn, then control pulse hydraulic generation device 23 is run manually, and pressure transmitter 25 is real-time
The collection outlet pressure of check valve 60 is simultaneously shown on touch-screen 18.Observe actual pressure pulsating quantity and contrasted with theoretical value, repeatedly
Feedback modifiers, the final reasonable value for determining h.
The present embodiment forming process is compared with Example 1 unlike another place, during semi-automatic forming, liquid of pulsing
Generation device 23 is pressed to be in running status, initial time pulsation cylinder piston rod 55 is in equalization point, and highly pressurised liquid is from pressurized cylinder 22
It is changed into sinuous pulsation pressure after.Sinuous pulsation pressure produce mechanism be：PLC14 output control electric signals, by servo
Driving servomotor 49 is rotated after driver 15 amplifies, and its rotational angular velocity changes for sinusoidal rule, and maximum is according to pulsation frequency
Rate ω and piston rod amplitude h are calculated acquisition by system automatically.Servomotor 49 drives ballscrew nut fitting to turn rotary motion
Linear motion is turned to, the driving piston rod 46 of nut 52 makees up and down reciprocatingly sinusoidal motion, changes rodless cavity pressure fluctuation；Check valve
57th, 60 highly pressurised liquid reverse flow in pulsation is prevented, reduces interference；Stop valve 59 is opened when pulsing loading and shaping, non-
Closed during pulsation loading and shaping, improve the service life of pressure transmitter 58.
Embodiment 3
The present embodiment is bulging pressure rectangle pulsation loading internal high pressure forming, illustrates present embodiment with reference to Fig. 1-9, Fig. 8.
Pressure loading curve function is in the present embodiment：
In formula, P0(t) it is the conventional linear loading curve in embodiment 1, Δ P is pulsation wave-amplitude, the present embodiment takes
5MPa；ω is to take 1Hz in ripple frequency, the present embodiment.
Unlike compared with Example 2, within each pulsation period, servomotor 49 drives piston with maximum (top) speed
Bar 46 is moved.Piston rod 46 is quickly moved at peak swing h at equalization point, is come downwards to after pause a period of time under equalization point
At h, quickly equalization point is returned to when suspending identical.
Embodiment 4
The present embodiment is bulging pressure triangle pulsation loading internal high pressure forming, illustrates present embodiment with reference to Fig. 1-6, Fig. 9.
Triangular wave in the present embodiment, amplitude Δ P=5MPa, cycle ω=1Hz.It is different with embodiment two
, within each pulsation period, the driving piston rod 47 of servomotor 46 is at the uniform velocity moved up and down since equalization point.
Embodiment 5
The present embodiment is the segments combined loading of a variety of load mode timesharing, illustrates present embodiment with reference to Fig. 1-9.
Input program is as shown in the table：
Pulse hydraulic generation device exports output square wave fluctuation pressure in sine wave fluctuation pressure, 5-15s in 0-5s,
15-20s exports triangular wave fluctuation pressure, realizes the segments combined loading of a variety of load mode timesharing.Amplitude h by 5mm finely tune to
5.3mm, the decay to pressure fluctuation carries out adequate compensation.
Claims (7)
1. a kind of Tube Hydroforming machine of bulging pressure fluctuation loading, including：Entablature, guide pillar, fast cylinder, master cylinder, activity
Crossbeam, upper mould, axial feed the cylinder drift consistent with quantity therewith, workbench, frame, lower mould, lower cylinder, electrical control cabinet,
PLC, servo-driver, button switch, control panel, touch-screen, system oil pipe, pressurized cylinder, pressure transmitter, high-pressure water pipe and
Pressure transmitter；It is characterized in that：Also include：
Pulse hydraulic generation device：The pulse hydraulic generation device includes：Servomotor, leading screw, ball, nut, countersunk head spiral shell
Nail, adpting flange, pulsation cylinder piston rod, pulsation cylinder cylinder body, inlet high pressure check valve, pressure transmitter, stop valve and go out liquid
Mouth high pressure check valve, servomotor is fixedly connected with leading screw；Leading screw, many balls, nuts collectively form ball-screw-transmission pair；
Nut base even circumferential is distributed multiple through holes, and adpting flange circumference correspondence position is also distributed the through hole of identical quantity, by right
The sunk screw of quantity is answered to connect the two；Pulsation cylinder piston rod upper end is fixedly connected with adpting flange, lower end and cylinder body shape
Into variable volume cavity；Cylinder body both sides connect high pressure check valve respectively, control highly pressurised liquid one-way flow；At pulse hydraulic cylinder liquid outlet
It is connected by stop valve with pressure transmitter；
Host hydraulic system：The host hydraulic system includes：Main sump, main motor, remote pressure regulating valve, constant pressure variable displacement pump,
System overflow valve, at least one accumulator, electrohydraulic servo valve, two-position four-way solenoid directional control valve and pressure gauge, main sump are equipped with
Hydraulic oil, main motor is connected by shaft coupling with constant pressure variable displacement pump；The oil inlet of constant pressure variable displacement pump is connected with fuel tank, and oil-out is extremely
One interface of system four-way connection；Four-way connection the other three interface respectively with accumulator, the oil inlet P of electrohydraulic servo valve, master
Machine other oil circuits connection；A, B hydraulic fluid port of electrohydraulic servo valve correspond to be connected with P, T hydraulic fluid port of solenoid directional control valve respectively；Electromagnetic switch
A, B hydraulic fluid port of valve correspond to be connected with middle part hydraulic fluid port, the end hydraulic fluid port of pressurized cylinder respectively；
Low pressure hydromechanical system：The low pressure hydromechanical system includes：High pressure check valve, overflow valve, topping up motor, charging pump, filtering
Shaping liquid medium is housed in device and water tank, water tank；Low pressure and mass flow charging pump inlet installs filter, and liquid outlet is to supercharging
The quick topping up of cylinder；Overflow valve makees hydromechanical system safety valve, and high pressure check valve prevents the highly pressurised liquid in pressurized cylinder from reversely flowing into low
Press charging pump.
2. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：The guide pillar is
4 cylindrical guides, are each passed through four holes of moved cross beam correspondence, and upper end is fixedly connected with entablature, lower end and workbench are solid
Fixed connection.
3. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：The master cylinder is
Major diameter plunger case, two fast cylinders are symmetrically distributed in the master cylinder left and right sides；Master cylinder, the cylinder body of two fast cylinders are fixedly connected on
Entablature lower surface, master cylinder plunger piston bar, fast cylinder piston-rod end are fixedly connected on moved cross beam upper surface.
4. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：On the upper mould
End face is fixedly connected in the middle part of moved cross beam lower surface, and lower mould is fixed on workbench upper surface and upper mould correspondence position.
5. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：The axial direction is entered
It is multiple to cylinder, is separately fixed at workbench left and right side, drift is connected horizontally in its piston rod end face.
6. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：The electric-controlled
Cabinet processed is fixedly connected on the right side of frame, and PLC is mounted on inside it with servo-driver；It is right that pressurized cylinder is fixedly connected on frame
Side, its hydraulic fluid port of low pressure chamber two is connected by system oil pipe with host hydraulic system, its high pressure chest inlet by high-pressure water pipe with
Low pressure hydromechanical system is connected, and its liquid outlet is connected by high-pressure water pipe with pulse hydraulic generation device；Pressure transmitter is inserted into
At pressurized cylinder liquid outlet；Liquid-through hole in the liquid outlet and drift of pulse hydraulic generation device is connected by high-pressure water pipe.
7. the Tube Hydroforming machine of bulging pressure fluctuation loading according to claim 1, it is characterized in that：The button is opened
Pass, touch-screen, low pressure hydromechanical system, host hydraulic system, pulse hydraulic generation device and pressure transmitter pass through cable respectively
It is connected with PLC input or output interface；The input of servo-driver is connected by cable with PLC output interfaces, and it is exported
End is connected with the servomotor in pulse hydraulic generation device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621403421.XU CN206455041U (en) | 2016-12-20 | 2016-12-20 | A kind of Tube Hydroforming machine of bulging pressure fluctuation loading |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621403421.XU CN206455041U (en) | 2016-12-20 | 2016-12-20 | A kind of Tube Hydroforming machine of bulging pressure fluctuation loading |
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| CN206455041U true CN206455041U (en) | 2017-09-01 |
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| CN201621403421.XU Withdrawn - After Issue CN206455041U (en) | 2016-12-20 | 2016-12-20 | A kind of Tube Hydroforming machine of bulging pressure fluctuation loading |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734493A (en) * | 2016-12-20 | 2017-05-31 | 桂林电子科技大学 | A kind of middle-size and small-size internal high-pressure forming machine of bulging pressure fluctuation loading |
| CN108516488A (en) * | 2018-04-20 | 2018-09-11 | 泉州市华创园智能研究有限公司 | A kind of safe feeding device |
| CN108591145A (en) * | 2018-04-14 | 2018-09-28 | 晋江市火炬油压机械有限公司 | A kind of hydraulic system applied in the small foaming machines of wall board type EVA |
| CN109590372A (en) * | 2018-12-04 | 2019-04-09 | 湘潭大学 | A kind of pipe fitting compound molding device |
| CN111054810A (en) * | 2019-12-03 | 2020-04-24 | 天津市天锻压力机有限公司 | Ultrahigh pressure working system of flexible forming medium of liquid-filling forming equipment |
| CN111779720A (en) * | 2020-06-22 | 2020-10-16 | 中国地质大学（北京） | Hydraulic system and high-temperature high-pressure synthesis equipment |
| CN113617918A (en) * | 2021-08-06 | 2021-11-09 | 山东盛润汽车有限公司 | Liquid tank bulging forming principle and process |
-
2016
- 2016-12-20 CN CN201621403421.XU patent/CN206455041U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734493A (en) * | 2016-12-20 | 2017-05-31 | 桂林电子科技大学 | A kind of middle-size and small-size internal high-pressure forming machine of bulging pressure fluctuation loading |
| CN108591145A (en) * | 2018-04-14 | 2018-09-28 | 晋江市火炬油压机械有限公司 | A kind of hydraulic system applied in the small foaming machines of wall board type EVA |
| CN108591145B (en) * | 2018-04-14 | 2023-07-11 | 晋江市火炬油压机械有限公司 | Hydraulic system applied to wallboard EVA small foaming machine |
| CN108516488A (en) * | 2018-04-20 | 2018-09-11 | 泉州市华创园智能研究有限公司 | A kind of safe feeding device |
| CN109590372A (en) * | 2018-12-04 | 2019-04-09 | 湘潭大学 | A kind of pipe fitting compound molding device |
| CN111054810A (en) * | 2019-12-03 | 2020-04-24 | 天津市天锻压力机有限公司 | Ultrahigh pressure working system of flexible forming medium of liquid-filling forming equipment |
| CN111779720A (en) * | 2020-06-22 | 2020-10-16 | 中国地质大学（北京） | Hydraulic system and high-temperature high-pressure synthesis equipment |
| CN113617918A (en) * | 2021-08-06 | 2021-11-09 | 山东盛润汽车有限公司 | Liquid tank bulging forming principle and process |
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