CN106623577A - Wave mode hydraulic loading method - Google Patents
Wave mode hydraulic loading method Download PDFInfo
- Publication number
- CN106623577A CN106623577A CN201610858890.9A CN201610858890A CN106623577A CN 106623577 A CN106623577 A CN 106623577A CN 201610858890 A CN201610858890 A CN 201610858890A CN 106623577 A CN106623577 A CN 106623577A
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- CN
- China
- Prior art keywords
- hydraulic
- liquid
- slab
- pulse
- wave
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- 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
- B21D26/031—Mould construction
Abstract
The invention discloses a wave mode hydraulic loading method. According to the method, liquid is injected into a hydraulic cavity, through pressure of a press machine, the liquid in the hydraulic cavity is extruded by changing the distance between an upper die and a lower die, and the hydraulic pressure increasing gradually is obtained; in addition, the upper die drives a rack to move downwards when moving downwards, the rack is in engagement transmission with a gear and drives a wave wheel to do rotational motion, the rotating wave wheel makes a piston do reciprocating motion, and accordingly the pulse hydraulic pressure with alternate magnitudes is achieved; under the combined action of the hydraulic pressure increasing gradually and the pulse hydraulic pressure, a traditional rigid male die is replaced with the liquid, and plate pulse hydraulic forming can be achieved; and by replacing gears or wave wheels with different parameters and changing the downward-moving speed of the upper die, pulse hydraulic loading modes with different amplitudes and different periods can be achieved. The method has the advantages of being simple and convenient, low in cost, reliable in process, low in using environment requirement and the like.
Description
Technical field
The invention belongs to mechanical engineering field, is related to a kind of pulse hydraulic manufacturing process, it is particularly a kind of to be used for metallic plate
The pulse hydraulic manufacturing process of base and open hollow part, material include the non-ferrous metal such as magnesium alloy, aluminium alloy, titanium alloy and
Other ferrous metal.
Background technology
In fields such as automobile, aircraft, space flight, part " lightweight " technical research is current study hotspot.How to protect
Under the conditions of card low cost, and manufacture that lightweight, intensity is high, the measured part of matter using easy method, to meet energy-conserving and environment-protective
Requirement, be key technology that the field urgently solves.The plastic forming technology of sheet metal or tubing can obtain lightweight, strong
The high part of degree, but plasticity is poor under the metal material room temperature of many high-quality, and the Plastic Forming limit is very low.Therefore need to be equipped with to add
Hot equipment, makes sheet metal or tubing complete Plastic Forming at high temperature.However, elevated temperature forming methods have again device it is complicated,
Operational hazards, high cost, metallic high temperature easily be oxidized the shortcomings of.In this context, Hydroforming is proposed in the industry.
Hydroforming is to replace punch or die with liquid, and in the presence of highly pressurised liquid or forcing press metallic plate is made
Material is plastically deformed, and then is configured to a kind of advanced technology of required part.The technology has forming limit height, formation of parts
Quality is good, high precision, the advantages of can shape complicated opening part, has obtained widely in industrial circle and experimental study field
Using.At present, the shaping such as the predominantly organic tool-hydro-drawing of hydraulic forming method, force feed drawing, radial thrust hydro-mechanical drawing
Method, the load mode of hydraulic coupling is based on the simple load modes such as constant hydraulic loaded, linear hydraulic loading.Research table
Bright, the part Thickness Distribution obtained under the load mode of simple hydraulic coupling is not uniform enough, is easily broken, and forming property is poor.For this purpose,
Calendar year 2001, professor Rikimaru of Japan proposes the new forming technique-pulse hydraulic forming technique of pulse hydraulic load mode.
Based on the technology, domestic scholars poplar running fire etc. have studied the forming property of tubing, under having drawn pulse hydraulic load mode, metal
The conclusion that the cold formability of part be able to can be increased substantially.At present, the research in terms of sheet metal pulse hydraulic shaping
Also few, relevant report is yet rarely seen.Japanese scholars Yogo is based on computer technology, develops a kind of pulse hydraulic shaping system
System, but the system has the shortcomings that complicated apparatus expensive, method, operation inconvenience, real-world environment have high demands, it is difficult to promote.State
Interior professor Yang Lianfa proposes a kind of method for producing pulse hydraulic pressure, and the method can realize simple pulse hydraulic loading,
But hydraulic loaded is irregular in forming process, fluctuating parameter (amplitude, cycle) is difficult to ensure card.
The content of the invention
The purpose of the present invention is to be directed to the deficiencies in the prior art, there is provided a kind of method is easy, with low cost, process reliable,
Forming quality is high, require sheet metal pulse hydraulic manufacturing process low, easy to spread to use environment.
The wave hydraulic loaded method of the present invention, it is characterised in that：Comprise the steps：
1st, charged piston is loaded into cylinder body oral area, the height is kept when sealing ring is completely into cylinder body；
2nd, using the inlet on charged piston top, manually hydraulic pump is injected liquid into die cavity, until liquid level and increasing
The counterbore bottom surface (working surface) of pressure piston upper end is equal, stops liquid feeding；
3rd, slab is had good positioning into placement on the work surface, covers blank holder；
4th, rack-and-pinion and wave wheel are installed, building mortion is used cooperatively with single action press；
5th, forcing press is started, forcing press effect blank holder carries out flanging to slab, while blank holder gives pressure transmission increasing
Pressure piston, promotes charged piston to move down, the liquid in squeeze cylinder body, to obtain required shaping hydraulic coupling；
6th, the liquid of certain pressure is flowed to around slab by elongated liquid-through hole, and to slab radial thrust is produced, to improve
The Radial Flow of metal material；
7th, moving down with charged piston, rack and pinion engagement drives the rotation of wave wheel, produces piston rod straight
Line is moved back and forth, the pulse hydraulic required for obtaining；
8th, with the increase of fluid pressure in die cavity, blank holder has the trend of floating, and now liquid flows through slab with work
Between surface, hydrodynamic lubrication is carried out to both；
9th, under the collective effect of shaping hydraulic coupling and pulse hydraulic, slab progressively shapes, and finally realizes sheet material pulsation liquid
Pressing formation process.
Compared with prior art its advantage is the present invention：：Method simple practical, with low cost, process are reliable, shaping
The limit is high, part quality is good, it is low that use environment is required, do not need special equipment, it is easy to promote.
In order to more preferably implement the inventive method, the invention provides with liquid replace punch and with liquid replace die when
Two kinds of sheet material pulse hydraulic building mortions, the content of the invention of device is illustrated again in a specific embodiment.
Description of the drawings
Fig. 1 is the principle schematic of sheet material pulse hydraulic manufacturing process of the present invention；
Fig. 2 is circular metal slab schematic diagram used in embodiment；
Fig. 3 is rectangular metal slab schematic diagram used in embodiment；
Fig. 4 (a) is with sheet material pulse hydraulic building mortion front view during liquid replacement punch in the present embodiment 1；
Fig. 4 (b) is with sheet material pulse hydraulic building mortion front view during liquid replacement punch in the present embodiment 1；
Fig. 5 is with sheet material pulse hydraulic building mortion schematic diagram during liquid replacement die in the present embodiment 2；
Fig. 6 is the schematic diagram of charged piston in embodiment.
In figure：Blank holder 1, charged piston 2, slab 3, liquid 4, die cavity 5, cylinder body 6, sealing ring 7, piston rod 8 connects spiral shell
Nail 9, connecting rod 10, rolling bearing 11, gear 12, wave wheel 13, tooth bar 14, base plate 15, punch 16, counterbore 17, working surface
18. elongated liquid-through hole 19, inlet 20, external pressure F.
Specific embodiment
Present disclosure is further elaborated with reference to the accompanying drawings and examples.
Embodiment 1：
As shown in Fig. 4 (a), Fig. 4 (b) and Fig. 6, by cylinder body 6, wave wheel 13, tooth bar 14, the piston rod with rolling bearing 11
8 grade component assemblies are good；Charged piston 2 is loaded into the oral area of cylinder body 6, when sealing ring 7 is completely into cylinder body 6, the height is kept；It is logical
The inlet 20 crossed in supercharging living 2, using hydraulic hand-pump by the injection device die cavity 5 of liquid 4, until liquid level and working surface
18 is equal, stops liquid feeding；Metal slabs 3 shown in Fig. 2 or Fig. 3 are placed on the working surface 18 of the upper end of charged piston 2 simultaneously
Have good positioning, then cover blank holder 1；Blank holder 1 carries out flanging in the presence of external force F to slab 3, while blank holder 1 will be pressed
Power passes to charged piston 2, promotes charged piston 2 to move down the liquid in extruding cylinder body 6, the highly pressurised liquid needed for obtain shaping
4；Highly pressurised liquid 4 is acted directly on metal slabs 3, and slab 3 starts gradually to shape；Simultaneously highly pressurised liquid 4 passes through elongated logical liquid
Hole 19 is flowed to around slab 3, and radial thrust is produced to slab 3, and the Radial Flow of slab 3 strengthens；It is same that charged piston 2 is moved down
When, tooth bar 14 and the engagement of gear 12 drive wave wheel 13 to rotate, and make piston rod 8 produce straight reciprocating motion, needed for obtaining
The pulse hydraulic wanted；As the increase of fluid pressure in die cavity 5, blank holder 1 have the trend of floating, now liquid flows through slab 3
Between working surface 18, hydrodynamic lubrication is carried out to both, to reduce frictional force between the two；Metal slabs 3 highly pressurised liquid,
Finally shape under radial thrust, hydrodynamic lubrication, the collective effect of pulse hydraulic；In forming process, can be by being arranged on feed liquor
Pressure gauge on mouth 20 knows the real-time pressure value in die cavity 5.
Embodiment 2：
As shown in Figure 5 and Figure 6, the parts such as cylinder body 6, wave wheel 13, tooth bar 14, the piston rod 8 with rolling bearing 11 are filled
Prepare；Charged piston 2 is loaded into cylinder body 6 and is pressed into behind bottom, fastened charged piston 2 and cylinder body 6 using corresponding measure, now
Both are unable to relative movement；Using method in the same manner as in Example 1, after the gas in die cavity 5 is all discharged, figure is placed
Slab 3 shown in 2 or Fig. 3 simultaneously covers blank holder 1；Blank holder 1 and charged piston 2 are coupled together with screw 9, and utilizes digital display
Torque spanner tightens screw 9, obtains the pressure-pad-force for needing；Punch 16 is put into the centre bore of blank holder 1, by external force F, is made
Punch 16 is descending to carry out drawing to slab 3；Meanwhile, using hydraulic hand-pump, liquid is constantly injected into die cavity 5 by inlet 20
Body 4, the hydraulic pressure force value needed for obtaining in die cavity 4；The liquid of certain pressure acts directly on the lower surface of slab 3, makes slab 3
Upper surface being adjacent to tightly with punch 16, both form and good frictionally hold effect, it is to avoid slab is relatively convex in forming process
Mould shifts；While external force F moves down punch 16, also promote tooth bar 14 to move down (be not drawn into Fig. 5), finally make piston rod
8 do straight reciprocating motion, form pulse hydraulic；Similar to Example 1, metal slabs 3 are in highly pressurised liquid, radial thrust, liquid
Finally shape under lubrication, beneficial friction, the collective effect of pulse hydraulic；Pressure gauge and overflow valve are provided with inlet 20, are used
In the liquid that the real-time pressure value and release of knowing liquid in die cavity 5 are excessive.
Claims (4)
1. a kind of wave hydraulic loaded method, is characterized in that：The method comprises the steps：
(1) charged piston is loaded into cylinder body oral area, the height is kept when sealing ring is completely into cylinder body；
(2) using the inlet on charged piston top, manually hydraulic pump is injected liquid into die cavity, until liquid level and supercharging
The counterbore bottom surface (working surface) of piston upper end is equal, stops liquid feeding；
(3) slab is had good positioning into placement on the work surface, covers blank holder；
(4) rack-and-pinion and wave wheel are installed, building mortion is used cooperatively with single action press；
(5) forcing press is started, forcing press effect blank holder carries out flanging to slab, while blank holder lives pressure transmission to supercharging
Plug, promotes charged piston to move down, the liquid in squeeze cylinder body, to obtain required shaping hydraulic coupling；
(6) liquid of certain pressure is flowed to around slab by elongated liquid-through hole, radial thrust is produced to slab, to improve metal
The Radial Flow of material；
(7) moving down with charged piston, rack and pinion engagement drives the rotation of wave wheel, makes piston rod produce straight line
Move back and forth, the pulse hydraulic required for obtaining；
(8) with the increase of fluid pressure in die cavity, blank holder has the trend of floating, and now liquid flows through slab and working surface
Between, and hydrodynamic lubrication is carried out to both；
(9) shaping hydraulic coupling and pulse hydraulic collective effect under, slab progressively shapes, finally realize sheet material pulse hydraulic into
Shape process.
2. wave hydraulic loaded method according to claim 1, is characterized in that：Disposably realized using single action press
The foundation of pressure-pad-force, shaping hydraulic coupling and pulse hydraulic.
3. wave hydraulic loaded method according to claim 1, is characterized in that：Can be by changing different specification size
Gear, tooth bar and wave wheel obtaining the pulse hydraulic load mode in various amplitude, cycle.
4. wave hydraulic loaded method according to claim 1, is characterized in that：Tooth bar is connected with charged piston using rigidity
Mode is connect, to ensure that shaping hydraulic coupling and pulse hydraulic can work asynchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610858890.9A CN106623577B (en) | 2016-09-27 | 2016-09-27 | A kind of wave hydraulic loaded method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610858890.9A CN106623577B (en) | 2016-09-27 | 2016-09-27 | A kind of wave hydraulic loaded method |
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| Publication Number | Publication Date |
|---|---|
| CN106623577A true CN106623577A (en) | 2017-05-10 |
| CN106623577B CN106623577B (en) | 2018-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610858890.9A Expired - Fee Related CN106623577B (en) | 2016-09-27 | 2016-09-27 | A kind of wave hydraulic loaded method |
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| CN (1) | CN106623577B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971382A (en) * | 2017-11-23 | 2018-05-01 | 北京航空航天大学 | It is a kind of to can be used for panel stiffness mould bulging and the device and method of hydraulic bulge test |
| CN109834152A (en) * | 2019-03-13 | 2019-06-04 | 中南大学 | A kind of anti-inflation drawing forming method of plate electromagnetic force and forming device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05212463A (en) * | 1992-02-05 | 1993-08-24 | Nippon Steel Corp | Device for forming metal sheet by using hydraulic pressure with metal die |
| CN101417299A (en) * | 2008-12-15 | 2009-04-29 | 哈尔滨工业大学 | Electric impulse auxiliary superplastic forming device and method |
| US20130067976A1 (en) * | 2011-09-20 | 2013-03-21 | Ford Global Technologies, Llc | Apparatus and Method Using Reduced Volume Electro-Hydraulic Chambers for Trimming and Joining Panels |
| CN104162948A (en) * | 2014-07-11 | 2014-11-26 | 初冠南 | High-strength or low-plasticity material hollow member low pressure thermoforming apparatus and method thereof |
| CN105033016A (en) * | 2015-07-13 | 2015-11-11 | 山东大学（威海） | Magnesium alloy sheet electroplastic incremental forming method |
-
2016
- 2016-09-27 CN CN201610858890.9A patent/CN106623577B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05212463A (en) * | 1992-02-05 | 1993-08-24 | Nippon Steel Corp | Device for forming metal sheet by using hydraulic pressure with metal die |
| CN101417299A (en) * | 2008-12-15 | 2009-04-29 | 哈尔滨工业大学 | Electric impulse auxiliary superplastic forming device and method |
| US20130067976A1 (en) * | 2011-09-20 | 2013-03-21 | Ford Global Technologies, Llc | Apparatus and Method Using Reduced Volume Electro-Hydraulic Chambers for Trimming and Joining Panels |
| CN104162948A (en) * | 2014-07-11 | 2014-11-26 | 初冠南 | High-strength or low-plasticity material hollow member low pressure thermoforming apparatus and method thereof |
| CN105033016A (en) * | 2015-07-13 | 2015-11-11 | 山东大学（威海） | Magnesium alloy sheet electroplastic incremental forming method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971382A (en) * | 2017-11-23 | 2018-05-01 | 北京航空航天大学 | It is a kind of to can be used for panel stiffness mould bulging and the device and method of hydraulic bulge test |
| CN109834152A (en) * | 2019-03-13 | 2019-06-04 | 中南大学 | A kind of anti-inflation drawing forming method of plate electromagnetic force and forming device |
| CN109834152B (en) * | 2019-03-13 | 2020-10-27 | 中南大学 | Sheet electromagnetic force reverse-expansion deep drawing forming method and forming device |
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| CN106623577B (en) | 2018-08-17 |
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Granted publication date: 20180817 Termination date: 20190927 |