CN101690960A - High-flexibility multi-head stretching machine - Google Patents
High-flexibility multi-head stretching machine Download PDFInfo
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- CN101690960A CN101690960A CN200910217701A CN200910217701A CN101690960A CN 101690960 A CN101690960 A CN 101690960A CN 200910217701 A CN200910217701 A CN 200910217701A CN 200910217701 A CN200910217701 A CN 200910217701A CN 101690960 A CN101690960 A CN 101690960A
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Abstract
The invention discloses a high-flexibility multi-head stretching machine, which relates to plastic processing equipment for three-dimensional curved surface forming of sheet parts and belongs to the field of mechanical engineering. The machine aims to make the distribution of the pulling stress and the tension strain of stretched parts more trend to be uniform, improve the stretching quality and the utilization rate of materials, and realize the stretching of curvature parts with larger transverse curvature or certain wave. The machine mainly comprises a main frame (1), material pulling mechanisms, material clamping mechanisms (3) and universal mechanisms (5), wherein a row of a plurality of the material pulling mechanisms, the material clamping mechanisms (3) and the universal mechanisms (5) are arranged on both sides of the main frame (1) respectively; the material pulling mechanisms consist of three hydraulic cylinders (2) respectively, one of the hydraulic cylinders (2) is horizontally arranged, the other hydraulic cylinder (2) is vertically arranged, and the third hydraulic cylinder (2) are slantways arranged; and one end of each of the three hydraulic cylinders (2) is hinged with the main frame (1) respectively, while the other end is jointly connected with the universal mechanism (5) and the material clamping mechanism (3) through a hydraulic cylinder connection body (4) respectively.
Description
Technical field:
High-flexibility multi-head stretching machine is the plastic working equipment that is used for the plate accessory three-dimensional curve generation, belongs to mechanical engineering field.
Background technology:
Traditional stretching machine, stretching former generally is divided into horizontal stretching machine, stretching former and vertical stretching machine, stretching former.Ectonexine at sheet material when pull-shaped produces tension and stretching strain along draw direction, thereby reduces the springback capacity after the workpiece plastic deformation.Under the cooperation of pull-shaped mould, make the various piece basic synchronization stretching longitudinally of sheet material behind the clamp clamping sheet material of tradition stretching machine, stretching former, the tension of part and stretching strain distribute obviously inhomogeneously when shaping hyperbolicity covering spare, and easily mould, drawing crack or forming defects such as wrinkling are not pasted in generation.In order to eliminate defective, pull-shapedly often need bigger process allowance with blank, the utilization rate of material is reduced.In addition, stretching machine, stretching former commonly used has at present adopted the multiaxis hydraulic servo control system, causes its manufacturing expense costliness.High-flexibility multi-head stretching machine is to make sheet material produce the equipment of stretcher strain more uniformly, is mainly used in the shaping of hyperbolicity curved surface part.
Summary of the invention:
The object of the present invention is to provide a kind of high-flexibility multi-head stretching machine, make the tension and the stretching strain distribution of sheet material be tending towards even more when pull-shaped, improve pull-shaped forming quality, improve stock utilization, reduce the manufacturing cost of stretching machine, stretching former, and realize that cross curvature has the curved-surface piece of certain wave pull-shaped more greatly or laterally.
Above-mentioned purpose of the present invention is achieved in that accompanying drawings is as follows:
A kind of high-flexibility multi-head stretching machine, mainly by frame 1, draw material mechanism, feeding clip mechanism 3 and omnidirectional mechanism 5 to form, it is characterized in that the both sides of frame 1 are being arranged a plurality of the drawing of a row respectively and expected mechanism, feeding clip mechanism 3 and omnidirectional mechanisms 5; Described drawing expects that mechanism is made up of three hydraulic cylinders 2 respectively, and one of them hydraulic cylinder 2 is horizontally disposed, and another hydraulic cylinder 2 arranges that vertically the 3rd hydraulic cylinder 2 is in tilted layout; Described three hydraulic cylinder 2 one ends are hinged with frame 1 respectively, and the other end connects with omnidirectional mechanism 5 and feeding clip mechanism 3 jointly by hydraulic cylinder connected body 4 respectively.
Described feeding clip mechanism 3 is made up of the two hydrodynamic cylinder pressures of little stroke, material folding frame 8 and material folding piece 7; Two hydrodynamic cylinder pressures of described little stroke and material folding frame 8 are made of one the formula structure; 7 one of described material folding pieces are fixedly connected on the piston of the two hydrodynamic cylinder pressures of little stroke, and another is fixedly connected on material folding frame 8; Described material folding frame 8 is provided with the connection holes that connects with omnidirectional mechanism 5.
Described omnidirectional mechanism 5 by hollow bearing pin 9, draw material mechanism connected body 10, bulb coupling bar 11, feeding clip mechanism coupling bar 12 and solid pin 13 to form; Draw material mechanism connected body 10 to connect with 3 hydraulic cylinder connected bodies 4 by hollow bearing pin 9; One end of bulb coupling bar 11 connects to draw by bulb expects mechanism's connected body 10, and the other end is by thread connection feeding clip mechanism coupling bar 12; Feeding clip mechanism coupling bar 12 is connected in by solid pin 13 on the material folding frame 8 of feeding clip mechanism 3, and feeding clip mechanism 3 can be realized the swing and the corner of any direction by omnidirectional mechanism 5.
Described feeding clip mechanism coupling bar 12 is adjustable with the length of thread engagement that bulb coupling bar 11 connects, and can also change the feeding clip mechanism coupling bar 12 of different length, to adapt to the mould of different in width.
Can also be between bulb coupling bar 11 and feeding clip mechanism coupling bar 12 installation length adjusting lever 14 again, to adapt to the mould of different in width.
Described omnidirectional mechanism 5 passes through steel wire rope 15 in the hollow bearing pin 9 of row's omnidirectional mechanism 5, to realize the roughly synchronous of hydraulic cylinder 2.The outer warp of steel wire rope 15 allows row's omnidirectional mechanism 5 to be arranged as curve-like less than the aperture of hollow bearing pin 9.
The mould that is used with stretching machine, stretching former adopts entity mould 17 or the adjustable digitlization mould 18 of multiple spot.
Expect in the mechanism a plurality of the drawing of a row of frame 1 both sides, solenoid directional control valve control of horizontally disposed 2 usefulness of a discharge opeing cylinder pressure, a discharge opeing cylinder pressure 2 of vertically arranging and a discharge opeing cylinder pressure 2 that is in tilted layout can each be controlled with a solenoid directional control valve equally, to simplify hydraulic control system.
High-flexibility multi-head stretching machine of the present invention, mainly by frame 1 and frame 1 each side a plurality of material mechanism, feeding clip mechanism 3 and the omnidirectional mechanisms 5 of drawing of a row form.Draw material mechanism to be made up of three hydraulic cylinders 2, wherein, one horizontally disposed, and another arranges that vertically the 3rd is in tilted layout.Feeding clip mechanism 3 is made up of the two hydrodynamic cylinder pressures of little stroke, material folding frame 8 and material folding piece 7, two hydrodynamic cylinder pressures of little stroke and material folding frame 8 are made of one the formula structure, material folding piece 7 by screw attachment on the piston of the two hydrodynamic cylinder pressures of little stroke, another material folding piece 7 by screw attachment on material folding frame 8.Draw an end of three hydraulic cylinders 2 of material mechanism hinged with frame 1 respectively, an other end connects with omnidirectional mechanism 5 and feeding clip mechanism 3 jointly by hydraulic cylinder connected body 4 respectively.Omnidirectional mechanism 5 by hollow bearing pin 9, draw material mechanism connected body 10, bulb coupling bar 11, feeding clip mechanism coupling bar 12 and solid pin 13 to form.Draw material mechanism connected body 10 to connect with 3 hydraulic cylinder connected bodies 4 by hollow bearing pin 9; One end of bulb coupling bar 11 connects to draw by bulb expects mechanism's connected body 10, and the other end is by thread connection feeding clip mechanism coupling bar 12; Feeding clip mechanism coupling bar 12 is connected on the material folding frame 8 of feeding clip mechanism 3 by solid pin 13.Stretch forming at miniature workpiece, can be by adjusting the length of thread engagement that feeding clip mechanism coupling bar 12 connects with bulb coupling bar 11, or change longer feeding clip mechanism coupling bar 12, or the method for installation length adjusting lever 14 reduces the process allowance of workpiece and the forming quality that improves workpiece as far as possible between bulb coupling bar 11 and feeding clip mechanism coupling bar 12.By the stroke that different hydraulic couplings is set and adjusts hydraulic cylinder 2, can also adjust and the hydraulic cylinder 2 of omnidirectional mechanism 5 connection places between angle, thereby change the position and the pull-shaped direction of feeding clip mechanism 3.For the simplified control system structure, the hydraulic coupling of hydraulic cylinder 2 can divide into groups to control with action; A horizontally disposed discharge opeing cylinder pressure 2 can be with a solenoid control, vertically a discharge opeing cylinder pressure 2 of arranging and the discharge opeing cylinder pressure 2 that is in tilted layout equally can each with a solenoid control.When pull-shaped, use all or several feeding clip mechanisms 3 clamp sheet material 6, and by the corresponding material mechanism stretch forming sheet material 6 under the cooperation of pull-shaped mould that draws.By adjusting the stroke and the hydraulic coupling of hydraulic cylinder 2, can obtain optimum stretch position and angle.Though the hydraulic coupling in the hydraulic cylinder 2 of same directive effect is identical, because the lateral cross section shape difference of mould is utilized law of minimum resistance, each feeding clip mechanism 3 produces different displacement and corner along draw direction; Because draw material mechanism to connect by omnidirectional mechanism 5 with feeding clip mechanism 3, when pull-shaped, feeding clip mechanism 3 can be complied with the variation tendency of die curve and swing and rotate.Therefore, the distribution of pull-shaped tension and stretching strain is more even.
Technique effect: high-flexibility multi-head stretching machine of the present invention, compare with traditional stretching machine, stretching former, by level, vertically and the interaction of a plurality of hydraulic cylinders 2 that are in tilted layout and the utilization of omnidirectional mechanism 5, make the load path that is applied on the sheet material 6 more reasonable, make the distribution of pull-shaped tension and stretching strain more even, reduce by pull-shaped process allowance, improve forming quality, improve stock utilization, and realize that cross curvature has the curved-surface piece of certain wave pull-shaped more greatly or laterally.This machine has been abandoned the control system of traditional stretching machine, stretching former complexity, the distortion of adopting simple, cheap hydraulic system to come Flexible Control sheet material, thereby the manufacturing cost of reduction stretching machine, stretching former.
Description of drawings:
Fig. 1 is the schematic diagram of high-flexibility multi-head stretching machine, wherein:
Fig. 1 (a) is a front view;
Fig. 1 (b) is a vertical view.
Fig. 2 is the schematic diagram that feeding clip mechanism is swung and rotated with sheet deformation trend.
Fig. 3 is the schematic diagram of feeding clip mechanism.
Fig. 4 is the schematic diagram of omnidirectional mechanism, wherein:
Fig. 4 (a) is a front view;
Fig. 4 (b) is a front view A-A cross sectional view.
Fig. 5 is to use the omnidirectional mechanism schematic diagram of the feeding clip mechanism coupling bar of lengthening.
Fig. 6 is the omnidirectional mechanism schematic diagram of installation length adjusting lever between bulb coupling bar and feeding clip mechanism coupling bar.
Fig. 7 is the schematic diagram that runs through steel wire rope in a plurality of hollow bearing pins.
Fig. 8 is a pull-shaped view when being used with the entity mould.
Fig. 9 is a pull-shaped view when being used with the adjustable digitlization mould of multiple spot.
Figure 10 is the pull-shaped view that is used with narrower entity mould after the lengthening feeding clip mechanism coupling bar length.
Figure 11 is the pull-shaped view that is used with the adjustable digitlization mould of multiple spot behind the installation length adjusting lever.
Wherein: 1. frame, 2. hydraulic cylinder, 3. feeding clip mechanism, 4. hydraulic cylinder connected body, 5. omnidirectional mechanism, 6. sheet material, 7. material folding piece, 8. material folding frame, 9. hollow bearing pin, 10. draw material mechanism connected body, 11. bulb coupling bars, 12. feeding clip mechanism coupling bars, 13. solid pin, 14. length adjustment bars, 15 steel wire ropes, 16. dop, 17. entity moulds, the adjustable digitlization mould of 18. multiple spots.
The specific embodiment:
Further specify the particular content of the present invention and the course of work below in conjunction with embodiment shown in the drawings.
Fig. 1 is the schematic diagram of high-flexibility multi-head stretching machine, mainly by frame 1 and frame 1 each side ten of rows draw material mechanism, feeding clip mechanism 3 and omnidirectional mechanism 5 to form.Draw material mechanism to be made up of three hydraulic cylinders 2 respectively, one horizontally disposed, and another arranges that vertically the 3rd is in tilted layout.One end of hydraulic cylinder 2 is hinged with frame 1 respectively, and the other end connects with omnidirectional mechanism 5 and feeding clip mechanism 3 jointly by hydraulic cylinder connected body 4 respectively.By changing the hydraulic coupling and the stroke of hydraulic cylinder 2, can change hydraulic cylinder 2 angle each other, thereby change the position and the pull-shaped direction of feeding clip mechanism 3.Level, vertically or the hydraulic coupling of the hydraulic cylinder 2 that tilts can control for unit by row.When pull-shaped, control the position and the pull-shaped direction of each feeding clip mechanism 3 by the size of hydraulic coupling and stroke in the control hydraulic cylinder 2, thereby make sheet material 6 obtain optimum stretch position and angle.Because draw material mechanism and feeding clip mechanism 3 to connect by omnidirectional mechanism 5, feeding clip mechanism 3 can adapt to the deformation tendency of sheet material 6 and swing and rotate, thereby realizes the characteristics of this stretching machine, stretching former high flexibility.
Fig. 2 is the schematic diagram that feeding clip mechanism is swung and rotated with sheet deformation trend.When pull-shaped, sheet material 6 can be tending towards the shape of mould gradually, finally pastes contour forming.In this process, the zone that feeding clip mechanism 3 clamps sheet material 6 also has the trend that adapts to the variation of mould shape face.When using traditional stretching machine, stretching former machining sheet, its clamp is the integral body of a rigidity, and the zone that clamp clamps sheet material 6 can not adapt to the variation of mould shape face, but remains straightened condition.When adopting high-flexibility multi-head stretching machine, because there are a plurality of feeding clip mechanisms 3 its both sides, each feeding clip mechanism 3 can be swung and rotate in any direction, can adapt to the variation tendency of mould shape face, thereby improves pull-shaped quality.
Fig. 3 is the schematic diagram of feeding clip mechanism, mainly is made up of the two hydrodynamic cylinder pressures of little stroke, material folding frame 8 and material folding piece 7.Two hydrodynamic cylinder pressures of little stroke and material folding frame 8 are made of one.Material folding piece 7 by screw attachment on the piston of the two hydrodynamic cylinder pressures of little stroke, another material folding piece 7 by screw attachment on material folding frame 8.When clamping sheet material 6, the oilholes above the material folding frame 8 advance hydraulic oil, and following oilhole goes out hydraulic oil, move downward thereby control the material folding piece 7 that the two hydrodynamic cylinder pressures of little stroke drive and piston links, with the material folding piece 7 common clamping sheet materials 6 that link with material folding frame 8.In the time of need unclamping sheet material 6, material folding frame 8 following oilholes advance hydraulic oil, and top oilhole goes out hydraulic oil, move upward thereby control the material folding piece 7 that the two hydrodynamic cylinder pressures of little stroke drive and piston links, and leave the material folding piece 7 that links with material folding frame 8, unclamp sheet material 6.Be drilled with connection holes on the material folding frame 8, so that connect with omnidirectional mechanism 5.
Fig. 4 is the schematic diagram of omnidirectional mechanism, mainly by hollow bearing pin 9, draw material mechanism connected body 10, bulb coupling bar 11, feeding clip mechanism coupling bar 12 and solid pin 13 to form.Draw material mechanism connected body 10 to connect with 3 hydraulic cylinder connected bodies 4 by hollow bearing pin 9; Bulb coupling bar 11 1 ends connect to draw by bulb expects mechanism's connected body 10, and the other end is by thread connection feeding clip mechanism coupling bar 12, and feeding clip mechanism coupling bar 12 is connected on the material folding frame 8 of feeding clip mechanism 3 by solid pin 13.Like this, feeding clip mechanism 3 just can also can rotate by the axis of bulb coupling bar 11 around bulb coupling bar 11 around the axis swing of solid pin 13.During when feeding clip mechanism 3 clamping sheet materials 6 and along certain pull-shaped direction and pull-shaped angle stretching sheet material 6, feeding clip mechanism 3 can be with the curve form swing and rotation of pull-shaped mould.
Fig. 5 is to use the omnidirectional mechanism schematic diagram of the feeding clip mechanism coupling bar of lengthening.When the less workpiece of processing dimension, the width of its mould also can be smaller, and when hydraulic cylinder 2 was elongated to range, sheet material 6 still needed bigger process allowance to be clamped by feeding clip mechanism 3.The process allowance of sheet material 6 and raising forming effect when processing small workpiece in order to reduce, can realize the stretch forming of miniature workpiece by the feeding clip mechanism coupling bar 12 of changing lengthening, also feeding clip mechanism coupling bar 12 can be made the adjustable structure of length and realize the pull-shaped of miniature workpiece.
Fig. 6 is the omnidirectional mechanism schematic diagram of installation length adjusting lever between bulb coupling bar and feeding clip mechanism coupling bar.When the less workpiece of processing dimension, for the process allowance that reduces sheet material 6 and improve forming effect, can between bulb coupling bar 11 and feeding clip mechanism coupling bar 12, realize by installation length adjusting lever 14.
Fig. 7 is the schematic diagram that runs through steel wire rope in a plurality of hollow bearing pins.In hollow bearing pin 9, install steel wire rope 15, and moving at the two ends of steel wire rope 15 by the string that holding screw installation dop 16 limits steel wire rope 15.Can to realize that each omnidirectional mechanism 5 and feeding clip mechanism 3 move roughly synchronous by installing steel wire rope 15.The outer warp of steel wire rope 15 allows row's omnidirectional mechanism 5 to be arranged as curve-like less than the aperture of hollow bearing pin 9.
Fig. 8 is a pull-shaped view when being used with the entity mould.At first, apply pulling force by horizontally disposed 2 pairs of sheet materials 6 of a discharge opeing cylinder pressure and carry out prestretched; Secondly, by the horizontally disposed shaping that makes sheet material 6 paste mould gradually with hydraulic cylinder 2 that be in tilted layout and realize sheet material 6.At the entity mould 17 of various different curvature and different in width, can suitably control hydraulic cylinder travel and realize the prestretched of sheet material 6 and shaping gradually.
Fig. 9 is a pull-shaped view when being used with the adjustable digitlization mould of multiple spot.Forming technology is basic identical when adopting entity mould 17, and just the adjustable digitlization mould 18 of multiple spot can conversion shape face, uses a covering device can realize the pull-shaped of multiple shape workpiece.
Figure 10 is the pull-shaped view that is used with narrower entity mould after the lengthening feeding clip mechanism coupling bar length.Among this figure, the width of entity mould 17 is smaller, under the certain situation of hydraulic cylinder 2 strokes, realize that the stretch forming of sheet material 6 also reduces the process allowance of sheet material 6 as far as possible, can realize by the length of lengthening feeding clip mechanism coupling bar 12, also can realize by installation length adjusting lever 14 between bulb coupling bar 11 and feeding clip mechanism coupling bar 12.
Figure 11 is the pull-shaped view that is used with the adjustable digitlization mould of multiple spot behind the installation length adjusting lever.When the adjustable digitlization mould 18 of multiple spot is adjusted to the smaller shape face of width, to under the situation that reduces sheet material 6 process allowances as far as possible, realize the shaping of sheet material 6, can realize by installation length adjusting lever 14 between bulb coupling bar 11 and feeding clip mechanism coupling bar 12, also can realize by the length of lengthening feeding clip mechanism coupling bar 12.
The course of work of bright stretching machine, stretching former for instance below.At first, the initial position of controlling each feeding clip mechanism by the different strokes and the hydraulic coupling of hydraulic cylinder according to the size of the size of mould and want shaped sheet is so that clamping sheet material, and carries out prestretched as required; Then, control a horizontally disposed discharge opeing cylinder pressure, vertically a discharge opeing cylinder pressure of layout or hydraulic coupling and the stroke in the discharge opeing cylinder pressure that is in tilted layout for unit, thereby control the position and the draw direction of each feeding clip mechanism by row.In pull-shaped process, though the hydraulic coupling in every discharge opeing cylinder pressure is identical, but because the difference of mould lateral cross section shape and the effect of omnidirectional mechanism, feeding clip mechanism can be complied with the variation tendency of die curve and swing and rotate, make sheet material obtain optimum stretch direction and amount of tension, finally make the tension of sheet material and stretching strain distribute more even.
Stretching machine, stretching former of the present invention has been abandoned the control system of traditional stretching machine, stretching former complexity, adopt reasonable structural design more, make pull-shaped tension and stretching strain distribute more even, improve pull-shaped quality and stock utilization, reduce the manufacturing cost of stretching machine, stretching former, and realize that cross curvature has the curved-surface piece of certain wave pull-shaped more greatly or laterally.
Claims (8)
1. high-flexibility multi-head stretching machine, mainly by frame (1), draw material mechanism, feeding clip mechanism (3) and omnidirectional mechanism (5) to form, it is characterized in that the both sides of frame (1) are being arranged a plurality of material mechanism, feeding clip mechanism (3) and the omnidirectional mechanisms (5) of drawing of a row respectively; Described drawing expects that mechanism is made up of three hydraulic cylinders (2) respectively, and one of them hydraulic cylinder (2) is horizontally disposed, and another hydraulic cylinder (2) arranges that vertically the 3rd hydraulic cylinder (2) is in tilted layout; Described three hydraulic cylinders (2) one ends are hinged with frame (1) respectively, and the other end connects with omnidirectional mechanism (5) and feeding clip mechanism (3) jointly by hydraulic cylinder connected body (4) respectively.
2. high-flexibility multi-head stretching machine according to claim 1 is characterized in that, described feeding clip mechanism (3) is made up of the two hydrodynamic cylinder pressures of little stroke, material folding frame (8) and material folding piece (7); Two hydrodynamic cylinder pressures of described little stroke and material folding frame (8) are made of one the formula structure; (7) one of described material folding pieces are fixedly connected on the piston of the two hydrodynamic cylinder pressures of little stroke, and another is fixedly connected on material folding frame (8); Described material folding frame (8) is provided with the connection holes that connects with omnidirectional mechanism (5).
3. high-flexibility multi-head stretching machine according to claim 1, it is characterized in that, described omnidirectional mechanism (5) by hollow bearing pin (9), draw material mechanism's connected body (10), bulb coupling bar (11), feeding clip mechanism coupling bar (12) and solid pin (13) to form; Draw material mechanism's connected body (10) to connect with 3 hydraulic cylinder connected bodies (4) by hollow bearing pin (9); One end of bulb coupling bar (11) connects to draw by bulb expects mechanism's connected body (10), and the other end is by thread connection feeding clip mechanism coupling bar (12); Feeding clip mechanism coupling bar (12) is connected in by solid pin (13) on the material folding frame (8) of feeding clip mechanism (3), and feeding clip mechanism (3) is realized the swing and the corner of any direction by omnidirectional mechanism (5).
4. high-flexibility multi-head stretching machine according to claim 3, it is characterized in that, described feeding clip mechanism coupling bar (12) is adjustable with the length of thread engagement that bulb coupling bar (11) connects, and can also change the feeding clip mechanism coupling bar (12) of different length, to adapt to the mould of different in width.
5. high-flexibility multi-head stretching machine according to claim 3 is characterized in that, installation length adjusting lever (14) again between bulb coupling bar (11) and feeding clip mechanism coupling bar (12) is to adapt to the mould of different in width.
6. according to claim 1 or 3 described high-flexibility multi-head stretching machines, it is characterized in that described omnidirectional mechanism (5) passes through steel wire rope (15) in the hollow bearing pin (9) of row's omnidirectional mechanism (5), to realize the roughly synchronous of hydraulic cylinder (2).The outer warp of steel wire rope (15) can make row's omnidirectional mechanism (5) be arranged as curve-like less than the aperture of hollow bearing pin (9).
7. according to claim 1,2,3,4,5 or 6 described high-flexibility multi-head stretching machines, it is characterized in that the mould that is used with stretching machine, stretching former adopts entity mould (17) or the adjustable digitlization mould of multiple spot (18).
8. high-flexibility multi-head stretching machine according to claim 1, it is characterized in that, expect in the mechanism a plurality of the drawing of a row of frame (1) both sides, a horizontally disposed discharge opeing cylinder pressure (2) is only with a solenoid directional control valve control, and a discharge opeing cylinder pressure (2) of vertical layout and a discharge opeing cylinder pressure (2) that is in tilted layout are equally also respectively with a solenoid directional control valve control.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217701XA CN101690960B (en) | 2009-10-09 | 2009-10-09 | High-flexibility multi-head stretching machine |
| PCT/CN2010/077581 WO2011041984A1 (en) | 2009-10-09 | 2010-10-08 | Multiple clamp type stretching and forming machine |
| US13/501,034 US8943869B2 (en) | 2009-10-09 | 2010-10-08 | Multiple clamp type stretching and forming machine |
| EP10821593.0A EP2486992B1 (en) | 2009-10-09 | 2010-10-08 | Multiple clamp type stretching and forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217701XA CN101690960B (en) | 2009-10-09 | 2009-10-09 | High-flexibility multi-head stretching machine |
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| CN101690960A true CN101690960A (en) | 2010-04-07 |
| CN101690960B CN101690960B (en) | 2011-06-08 |
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| CN200910217701XA Active CN101690960B (en) | 2009-10-09 | 2009-10-09 | High-flexibility multi-head stretching machine |
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