CN108000920A - Array hydraulic forming device and the forming method using the device - Google Patents
Array hydraulic forming device and the forming method using the device Download PDFInfo
- Publication number
- CN108000920A CN108000920A CN201711258717.6A CN201711258717A CN108000920A CN 108000920 A CN108000920 A CN 108000920A CN 201711258717 A CN201711258717 A CN 201711258717A CN 108000920 A CN108000920 A CN 108000920A
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- hydraulic
- workpiece
- array
- cylinder
- lower die
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A kind of forming method the invention discloses array hydraulic forming device and using the device, array hydraulic forming device, the lower die to cooperate including upper mold, with upper mold, at least one is equipped with array hydraulic device to the upper die and lower die, and the array hydraulic device is at least made of several hydraulic cylinders and the deck plate for installing hydraulic cylinder；, can be by individually controlling the hydraulic cylinder of several in array hydraulic device to be processed workpiece during shaping；Use the forming method of the device：1. place workpiece, 2. fixation workpiece, 3. pressing formations；By individually controlling the hydraulic cylinder in array hydraulic device, mould and workpiece uniform force during so as to ensure shaping, realize that workpiece becomes once-forming by repeatedly shaping, it is simply easily operated to greatly promote the optimal molding effect of material, production efficiency and equipment overall structure.
Description
Technical field
The present invention relates to a kind of hydraulic forming device technical field, more particularly to array hydraulic forming device and side
Method.
Background technology
Current hydraulic press generally is single cylinder, twin-tub or three cylinder hydraulic presses, and there are one to ask for above-mentioned hydraulic press
Topic, is exactly 200 tons when being actuated for processing every time exactly if its hydraulic cylinder is 200 tons, can not be according to the work produced every time
Part different process individually carries out the dynamics adjustment of pressure, mould and workpiece discontinuity when causing to be molded, and is producing one
A little special-shaped workpieces for needing the pressure forming of multistage multi-region domain, it is necessary to carry out Multi-step forming or stretching, can not realize once-forming
Production, causes low production efficiency, shaping accuracy is low, unstable product quality；Wherein individually control pressure can not also exist very
More problems, such as in punching press since mould has certain rigidity, and general hydraulic press produces mould due to can not individually control
Raw pressure, therefore cause pressure-pad-force insufficient, can not normally it be shaped, and existing settling mode is to do power by inserted sheet
Degree compensation.
Wherein, it is typically all the hydraulic pressure that large tank adds both sides small oil tank among selection in order to adapt to process various workpiece
Machine is processed, and large tank can not realize that F.F. is processed since cylinder barrel is limited greatly into speed oil, and there are the system of large tank
Make difficulty height, oil sealing sealing is difficult to ensure that, produces and processes the shortcomings of of high cost.
The content of the invention
In view of the above shortcomings of the prior art, the purpose of the invention is to provide a kind of array hydraulic forming device,
By using the mode of array hydraulic device, equipment overall structure is simply easily operated, reduce production cost, and workpiece into
Type amplitude is big, breaks through prior art shaping scope, forming efficiency and forming quality.
In view of the above shortcomings of the prior art, it is another object of the present invention in order to provide it is a kind of using array hydraulic pressure into
The forming method of type device, is realized by individually controlling several hydraulic cylinders to be processed workpiece, so as to ensure mould during shaping
Tool and workpiece uniform force, and can realize that repeatedly shaping becomes one-pass molding to workpiece, high precision machining, product quality are steady
Fixed, production efficiency is high.
The present invention is realized in that above-mentioned purpose：
Array hydraulic forming device, including upper mold, with upper mold cooperate lower die, the upper die and lower die at least one set
There is array hydraulic device, the array hydraulic device is at least by several hydraulic cylinders and the table top for installing hydraulic cylinder
Plate forms, and the deck plate is laid with multiple through holes and forms oil cylinder；The hydraulic cylinder include oil cylinder cover, oil cylinder bottom, piston with
And piston rod, the oil cylinder cover are arranged on the top of oil cylinder, the oil cylinder bottom is arranged on the bottom of oil cylinder, the piston and piston
Bar is movably arranged in oil cylinder；During shaping, by individually control the hydraulic cylinders of several in array hydraulic device to workpiece into
Row processing.
Wherein, the hydraulic cylinder arrangement mode of the array hydraulic device is that unified cylinder diameter is evenly distributed with spread configuration.
Wherein, the hydraulic cylinder arrangement mode of the array hydraulic device is central large-diameter, and the small cylinder diameter of surrounding is arranged
Row are set.
Wherein, the lower die is at least made of active mould seat and die cavity, and the die cavity is movably installed at active mould seat
In；During shaping, after Driven by Hydraulic Cylinder die cavity rises, die cavity is separated with active mould seat.
Wherein, the active mould seat corresponds to the piston rod of hydraulic cylinder and is laid with pilot hole, piston rod through pilot hole with
Die cavity is flexibly connected, and drives die cavity OQ t to move.
Wherein, the active mould seat is additionally provided with guide blot, and die cavity is flexibly connected simultaneously by guide blot with active mould seat
Upper and lower translation.
Wherein, the active mould seat is equipped with translation slide and drives the driving device of active mould seat, and active mould seat passes through
Driving device is moved horizontally along translation slide.
Wherein, the conveyor for transmitting workpiece is additionally provided with, the conveyor is located at the both sides of lower die.
A kind of forming method using the array hydraulic forming device, comprises the following steps：
A. workpiece is placed：The workpiece for needing to shape is positioned between upper die and lower die；
B. workpiece is fixed：Driving and several corresponding hydraulic cylinders of edge of work shape, the edge of workpiece are gripped, so
Corresponding hydraulic cylinder is driven according to lower die and upper mold shape afterwards, so that upper mold coordinates the position that workpiece is needed to shape by lower die
Grip；
C. pressing formation：Machining area and shape are needed according to workpiece, individually control upper mold or lower die at least one
Several hydraulic cylinders make corresponding action, and the more locals for needing to shape to workpiece apply pressure and according to circumstances
The dynamics of pressure is adjusted, until workpiece completes forming.
Beneficial effects of the present invention：By using array hydraulic device, the dynamics for individually controlling cylinder pressure is realized
Adjustment, can ensure mould and workpiece uniform force during shaping, realize that workpiece becomes once-forming by repeatedly shaping, greatly promote
The optimal molding effect of material, production efficiency and equipment overall structure are simply easily operated；And pass through upper and lower array hydraulic device
A variety of various combinations realize different advantage functions, effectively instead of the function of existing a variety of production equipments, be greatly lowered and set
Standby production cost, improves production material shaping scope and forming quality of products.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings：
Fig. 1 is the partial structural diagram of the array hydraulic device of the present invention；
Fig. 2 is the schematic diagram of array hydraulic device in the embodiment of the present invention one；
Fig. 3 is the schematic diagram of array hydraulic device in the embodiment of the present invention two；
Fig. 4 is the schematic diagram of array hydraulic device in the embodiment of the present invention four；
Fig. 5 is the lower die of the present invention and its structure diagram of associated component.
In figure, 1. hydraulic cylinders, 2. deck plates, 3. oil cylinder covers, 4. oil cylinder bottoms, 5. pistons, 6. piston rods, 7. active mould seats,
8. die cavity, 9. pilot holes, 10. guide blots, 11. translation slides, 12. conveyors, 13. workpiece.
Embodiment
As shown in Figure 1, array hydraulic forming device, including upper mold, the lower die that cooperates with upper mold, the upper mold and
At least one is equipped with array hydraulic device to lower die, and the array hydraulic device at least by several hydraulic cylinders 1 and is used for
The deck plate 2 of installation hydraulic cylinder 1 forms, and the deck plate 2 is laid with multiple through holes and forms oil cylinder；The hydraulic cylinder 1 includes
Oil cylinder cover 3, oil cylinder bottom 4, piston 5 and piston rod 6, the oil cylinder cover 3 are arranged on oil cylinder top, and the oil cylinder bottom 4 is arranged on
The bottom of oil cylinder, the piston 5 and piston rod 6 are movably arranged in oil cylinder；During shaping, by individually controlling array hydraulic pressure to fill
The hydraulic cylinder 1 of several in putting processes workpiece 13.By using array hydraulic device, realize that individually control hydraulic cylinder 1 is pressed
The dynamics adjustment of power, can ensure 13 uniform force of mould and workpiece during shaping, realize that workpiece 13 is become once by repeatedly shaping
Shaping, it is simply easily operated to greatly promote the optimal molding effect of material, production efficiency and equipment overall structure；And pass through upper and lower battle array
A variety of various combinations of column hydraulic device realize different advantage functions, effectively instead of the function of existing a variety of production equipments,
Equipment production cost is greatly lowered, improves production material shaping scope and forming quality of products.
In current plant produced needed by the process machine-shaping such as punching press, stretching and sawing sheet, in order to complete this
A little different processes are to need the plurality of devices such as hydraulic press, stretching-machine and sawing sheet punching machine, and buy plurality of devices to tackle
Different manufacturing procedures, can increase considerably production equipment cost, while can take excessive production space, greatly limit factory
The further development of production, therefore the array hydraulic device of upper mold or lower die can be according to production different workpieces 13 in the present invention
And processing technology realizes different advantage functions, the hydraulic cylinder 1 of the array hydraulic device arranges so as to carry out various combination
Composition can at least be divided into unified cylinder diameter as shown in Figure 2 and be evenly distributed with spread configuration and central large-diameter as shown in Figure 3, surrounding
Small cylinder diameter is evenly distributed with spread configuration, and the mode that unified cylinder diameter is evenly distributed with spread configuration below is sketched as A, central large-diameter, the small cylinder of surrounding
The mode that footpath is evenly distributed with spread configuration is sketched and mainly can at least be divided into specific examples below for B, wherein its permutation and combination method：
As shown in Figure 1, specific embodiment one is the conventional combining form of upper mold A and lower die A, system is equipped with by upper die and lower die
The hydraulic cylinder 1 of one cylinder diameter uniformly arranges；It is using the forming method of the device in the present embodiment：When preforming, under
Mould shape rises corresponding hydraulic cylinder 1 and rises lower die, while upper mold coordinates lower die to grip workpiece 13, then synchronous
It is preforming that control hydraulic cylinder 1 drives upper die and lower die to complete workpiece 13；Finally in precise forming, individually control needs
Continue the corresponding hydraulic cylinder 1 in Accurate Shaping position and make corresponding action, apply pressure so as to continue further to adjust workpiece 13
Power, until completing tensile deformation；It can realize instead of 13 drawing processes of special-shaped workpiece such as existing convention square, ellipses, it is real
The now accurate deformation shaping to special-shaped workpiece 13, realizes that repeatedly shaping becomes one-pass molding, material is reached optimal shaping effect
Fruit.
As shown in Figures 1 and 2, more cylinder diameters that specific embodiment two is upper mold B and lower die A or upper mold A and lower die B combine shape
Formula, can realize instead of existing conventional circular Curve drawing process；It is using the forming method of the equipment in the present embodiment：Shaping
When, the hydraulic cylinder 1 that array hydraulic device drives the small cylinder diameter of surrounding according to upper die and lower die shape first is quickly moved, and is made
Upper mold coordinates lower die to grip 13 edge of workpiece, then controls the hydraulic cylinder 1 of lower die center large-diameter to rise the mould of lower die
Chamber 8 applies workpiece 13 pressure, and Synchronization Control clamps the hydraulic cylinder 1 of the 13 small cylinder diameter of edge surrounding of workpiece and clamps workpiece 13
Move down, so that realizing to 13 tensile deformation of workpiece；Because conventional circular Curve 13 centre position in shaping requires to apply
Pressure it is relatively large, therefore center uses the hydraulic cylinder 1 of large-diameter, and need to improve at the same time molding precision and quickly into
Row clamping movement, so surrounding uses the hydraulic cylinder 1 of small cylinder diameter, is controlled to workpiece 13 so as to effectively adapt to technique
The pressure of application, improves the precision of shaping.
Wherein, in this specific embodiment the small cylinder diameter of surrounding due to fast into speed oil, can realize rapid uplift and
Decline, its speed is that the hydraulic cylinder 1 of existing large-diameter can not much be compared, largely improving production efficiency；In addition this reality
The hydraulic cylinder 1 applied in example is small cylinder diameter and quantity is more, and the girth of overall 1 sealing ring of hydraulic cylinder and the prior art are big in the present invention
Compared to more lengthening, oil sealing density and Compressive Performance also become higher the hydraulic cylinder 1 of cylinder diameter therewith；While the hydraulic cylinder 1 of small cylinder diameter is also
Hydraulic cylinder 1 than general large-diameter is more prone to manufacture, and production material greatly reduces, and processing cost reduces.
As shown in Fig. 2, specific embodiment three, which is upper mold A and lower die, is not provided with array hydraulic device or lower die A and upper mold
It is not provided with the combining form of array hydraulic device, during shaping, controls upper mold or lower die to be rushed by array hydraulic device
Material is pressed off, so as to replace existing punching machine sawing sheet；As shown in figure 5, in addition to punching machine beat auto-cut can be realized,
The conveyor 12 for transmitting workpiece 13 is additionally provided with, the conveyor 12 is located at the both sides of lower die, workpiece 13 is being transmitted
Movement is transported on band 12, reduces manufacturing procedure, realization replaces punching machine beat auto-cut；In addition when two or more table apparatus combine
, it can be achieved that roll bending plurality of specifications sawing sheet, forms auto-cut center, effectively instead of the work(of existing a variety of production equipments after putting
Can, equipment production cost is greatly lowered, improves production efficiency and product quality.
As shown in figure 5, waste material clout is reduced in order to further make 13 sawing sheet of workpiece more flexible in this specific embodiment
Produce, the active mould seat 7 is equipped with translation slide 11 and driving device, and active mould seat 7 is by driving device along translation slide
11 move horizontally, thus enable mould move realization laterally repeatedly processing so that mould can more flexibly move into
Row processing sawing sheet, makes full use of workpiece 13, reduces the generation of waste material, substantially reduce production cost.
In addition, in shaping, if when production only needs the less workpiece 13 of pressure, can reasonably subtract under physical state
Few hydraulic cylinder 1, so as to more save energy consumption, reduces production cost.
As shown in figure 4, specific embodiment four is to improve the utilization rate of hydraulic cylinder 1, the piston rod 6 of the hydraulic cylinder 1 with
And the shape of oil cylinder is equal for square or hexagon, the wall thickness of the oil cylinder, and the hydraulic cylinder 1 of honeycomb structure is integrally formed
Array, so that the contact area of the piston rod 6 and mould and workpiece 13 of hydraulic cylinder 1 is greatly increased, it is more efficient rationally to utilize
To hydraulic cylinder 1, pressure is set more to be uniformly distributed.
As shown in figure 5, the pressure that hydraulic cylinder 1 applies during in order to reduce processing has an impact die cavity 8 and hydraulic cylinder 1 etc.,
During shaping, after hydraulic cylinder 1 drives die cavity 8 to rise, die cavity 8 is separated with active mould seat 7, therefore in processing, upper die and lower die
The pressure that hydraulic cylinder 1 applies can be evenly distributed with and be distributed on each hydraulic cylinder 1, so as to mitigate the shadow of the equipment such as die cavity 8 and hydraulic cylinder 1
Ring, greatly increase the service life of equipment, reduce the cost of plant maintenance.
Wherein, in order to ensure the connection accuracy between hydraulic cylinder 1 and die cavity 8, deviation, the active mould seat are prevented
7 correspondence hydraulic cylinders 1 are laid with pilot hole 9, and the output terminal of hydraulic cylinder 1 is equipped with piston rod 6 and piston 5, and the hydraulic cylinder 1 passes through
Piston rod 6 drives piston 5, and the pilot hole 9 of piston 5 through active mould seat 7 is flexibly connected with die cavity 8, and drives die cavity 8 opposite
Elevating movement.When active mould seat 7 is moved to corresponding Working position with die cavity 8, corresponding number of hydraulic cylinder 1, which rises, to be worn
The pilot hole 9 for crossing active mould seat 7 is connected with die cavity 8, then proceedes to driving die cavity 8 and carries out pressure processing；Work as at the same time and process
Cheng Hou, when active mould seat 7 needs to be moved to next Working position, hydraulic cylinder 1 drives die cavity 8 to decline, and die cavity 8 is reset to activity
In die holder 7, while hydraulic cylinder 1 continues to fall back to initial position, completely disengages die cavity 8 and active mould seat 7 so as to leave, makes work
Dynamic model seat 7 can be moved to next Working position with die cavity 8.
Wherein, do not deviated by ensure that die cavity 8 moves up and down in active mould seat 7, the active mould seat 7, which is additionally provided with, leads
To bolt 10, lower die is flexibly connected by guide blot 10 with active mould seat 7 and upper and lower translation, therefore can pass through guide blot
10 make die cavity 8, from without departing from coming off, better ensure that the accuracy of production and processing along moving up and down.
A kind of forming method using array hydraulic forming device, comprises the following steps：
A. workpiece is placed：Workpiece 13 is positioned between upper die and lower die；
B. workpiece is fixed：The hydraulic cylinder 1 of 13 edge surrounding of workpiece is driven to grip the edge of workpiece 13 first, then basis
Lower die and upper mold shape drive corresponding hydraulic cylinder 1, so that upper mold coordinates lower die to press from both sides the position that workpiece 13 needs to shape
Hold fixation；
C. pressing formation：Machining area and shape are needed according to workpiece 13, individually control multiple liquid of upper die and lower die
Cylinder pressure 1 makes corresponding action, and the more locals for needing to shape to workpiece 13 at the same time carry out application multistage pressure, until work
Part 13 completes forming.
Claims (9)
1. array hydraulic forming device, including upper mold, the lower die with upper mold mutual cooperation, it is characterised in that：The upper mold and
At least one is equipped with array hydraulic device to lower die, and the array hydraulic device is at least by several hydraulic cylinders（1）And use
In installation hydraulic cylinder（1）Deck plate（2）Composition, the deck plate（2）It is laid with multiple through holes and forms oil cylinder；The hydraulic pressure
Cylinder（1）Including oil cylinder cover（3）, oil cylinder bottom（4）, piston（5）And piston rod（6）, the oil cylinder cover（3）It is arranged on the top of oil cylinder
End, the oil cylinder bottom（4）It is arranged on the bottom of oil cylinder, the piston（5）And piston rod（6）It is movably arranged in oil cylinder；Shaping
When, by the hydraulic cylinder for individually controlling several in array hydraulic device（1）To workpiece（13）It is processed.
2. array hydraulic forming device according to claim 1, it is characterised in that：The liquid of the array hydraulic device
Cylinder pressure（1）Arrangement mode is that unified cylinder diameter is evenly distributed with spread configuration.
3. array hydraulic forming device according to claim 1, it is characterised in that：The liquid of the array hydraulic device
Cylinder pressure（1）Arrangement mode is central large-diameter, and the small cylinder diameter of surrounding is evenly distributed with spread configuration.
4. array hydraulic forming device according to claim 1, it is characterised in that：The lower die is at least by active mould seat
（7）And die cavity（8）Composition, the die cavity（8）It is movably installed at active mould seat（7）In；During shaping, hydraulic cylinder（1）Driving
Die cavity（8）After rise, die cavity（8）With active mould seat（7）Separation.
5. array hydraulic forming device according to claim 4, it is characterised in that：The active mould seat（7）Corresponding liquid
Cylinder pressure（1）Piston rod（6）It is laid with pilot hole（9）, piston rod（6）Through pilot hole（9）With die cavity（8）It is flexibly connected,
And drive die cavity（8）OQ t moves.
6. array hydraulic forming device according to claim 5, it is characterised in that：The active mould seat（7）It is additionally provided with
Guide blot（10）, die cavity（8）Pass through guide blot（10）With active mould seat（7）It is flexibly connected simultaneously upper and lower translation.
7. array hydraulic forming device according to claim 1, it is characterised in that：The active mould seat（7）Equipped with flat
Move slide（11）And the driving device of driving active mould seat, active mould seat（7）By driving device along translation slide（11）
Move horizontally.
8. array hydraulic forming device according to claim 1, it is characterised in that：It is additionally provided with and is used for transmitting workpiece（13）
Conveyor（12）, the conveyor（12）Positioned at the both sides of lower die.
9. a kind of usage right requires the forming method of the 1 array hydraulic forming device, it is characterised in that including following steps
Suddenly：
A. workpiece is placed：The workpiece that needs are shaped（13）It is positioned between upper die and lower die；
B. workpiece is fixed：Driving and workpiece（13）Several corresponding hydraulic cylinders of edge shape（1）, by workpiece（13）Edge
Grip, corresponding hydraulic cylinder is then driven according to lower die and upper mold shape（1）, so that upper mold coordinates lower die by workpiece
（13）The position for needing to shape grips；
C. pressing formation：According to workpiece（13）Machining area and shape are needed, individually controls upper mold or lower die at least one
Several hydraulic cylinders of person（1）Corresponding action is made, and to workpiece（13）The more locals for needing to shape carry out application pressure
Power and the dynamics for according to circumstances adjusting pressure, until workpiece（13）Complete forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258717.6A CN108000920A (en) | 2017-12-04 | 2017-12-04 | Array hydraulic forming device and the forming method using the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258717.6A CN108000920A (en) | 2017-12-04 | 2017-12-04 | Array hydraulic forming device and the forming method using the device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108000920A true CN108000920A (en) | 2018-05-08 |
Family
ID=62055929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711258717.6A Pending CN108000920A (en) | 2017-12-04 | 2017-12-04 | Array hydraulic forming device and the forming method using the device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108000920A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5461895A (en) * | 1993-12-09 | 1995-10-31 | Danieli United, Inc. | High capacity hydraulic leveller |
| CN2411269Y (en) * | 1999-10-13 | 2000-12-20 | 大连绿洲食品包装有限公司 | Reciprocating oscillating forming machine for paper pulp molding product |
| KR20100090517A (en) * | 2009-02-06 | 2010-08-16 | 원창스틸(주) | Shearing system having a flexible leveller |
| CN105478539A (en) * | 2015-12-29 | 2016-04-13 | 哈尔滨工业大学（威海） | Plate multipoint progressive forming device |
| CN106825183A (en) * | 2017-01-18 | 2017-06-13 | 吉林大学 | The curved surface stretch forming device of multipoint excitation control |
| CN207808562U (en) * | 2017-12-04 | 2018-09-04 | 江门市冈州科技发展有限公司 | Array hydraulic forming device |
-
2017
- 2017-12-04 CN CN201711258717.6A patent/CN108000920A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5461895A (en) * | 1993-12-09 | 1995-10-31 | Danieli United, Inc. | High capacity hydraulic leveller |
| CN2411269Y (en) * | 1999-10-13 | 2000-12-20 | 大连绿洲食品包装有限公司 | Reciprocating oscillating forming machine for paper pulp molding product |
| KR20100090517A (en) * | 2009-02-06 | 2010-08-16 | 원창스틸(주) | Shearing system having a flexible leveller |
| CN105478539A (en) * | 2015-12-29 | 2016-04-13 | 哈尔滨工业大学（威海） | Plate multipoint progressive forming device |
| CN106825183A (en) * | 2017-01-18 | 2017-06-13 | 吉林大学 | The curved surface stretch forming device of multipoint excitation control |
| CN207808562U (en) * | 2017-12-04 | 2018-09-04 | 江门市冈州科技发展有限公司 | Array hydraulic forming device |
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Application publication date: 20180508 |
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