CN105443453A - Steel plate pre-bending machine and clamping cylinder hydraulic control device thereof - Google Patents

Steel plate pre-bending machine and clamping cylinder hydraulic control device thereof Download PDF

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Publication number
CN105443453A
CN105443453A CN201511031249.XA CN201511031249A CN105443453A CN 105443453 A CN105443453 A CN 105443453A CN 201511031249 A CN201511031249 A CN 201511031249A CN 105443453 A CN105443453 A CN 105443453A
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China
Prior art keywords
clamping cylinder
clamping
clamped
accumulator
hydraulic control
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CN201511031249.XA
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CN105443453B (en
Inventor
刘兆祺
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Taiyuan Heavy Industry Co Ltd
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Taiyuan Heavy Industry Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors

Abstract

The invention provides a steel plate pre-bending machine and a clamping cylinder hydraulic control device thereof. The clamping cylinder hydraulic control device comprises a clamping beam, a lower die beam, a clamping cylinder, an oil tank, a pressure source and an energy accumulator, wherein both the pressure source and the energy accumulator can be selectively communicated with the clamping cylinder, so as to supply oil to the clamping cylinder, a propping part is arranged on the clamping cylinder, and the propping part can prop the lower part of the lower die beam, so as to enable the lower die beam to drive the clamping beam to move downward during declining, and enable the hydraulic oil inside the clamping cylinder to enter the energy accumulator. The clamping cylinder hydraulic control device provided by the invention can drive the clamping beam to rise quickly through the energy accumulator, so that the installed power of a hydraulic system is reduced, oil supply to the clamping cylinder is achieved through the pressure source, pressure drop of the clamping cylinder, caused by inner leaking, can be avoided, reliable clamping of the clamping beam to the steel plate can be ensured, moreover, the lower die beam drives the clamping beam to fall, a double acting cylinder is not required, and the problem of cylinder piston rod damage caused by asynchronous actions of various cylinders can be avoided.

Description

Steel plate pre-bending machine and clamping cylinder hydraulic control device thereof
Technical field
The present invention relates to a kind of hydraulic control device, particularly relate to a kind of clamping cylinder hydraulic control device, the invention still further relates to a kind of steel plate pre-bending machine with this clamping cylinder hydraulic control device.
Background technique
Steel plate pre-bending machine is used in straight-line joint submerged arc welding tube production line, can carry out pre-bending to the both sides of steel plate.See Fig. 1, treat the rollgang of steel plate 17 by inlet side of pre-bending, be transported between the upper mould beam 18 of prebending machine and lower lock piece 16 piecemeal, lower lock piece 16 draws close matched moulds to upper mould beam 18, can be shaping by mould step pressure by the longitudinal edge at steel plate 17 two ends, bend to certain non-uniform curvature, make it the nominal curvature reaching shaped steel plate, and within the scope that the circularity at steel plate 17 pre-bending edge requires at weld seam, thus ensure geometrical shape and the dimensional accuracy of steel plate 17 welded seam area.
Before steel plate 17 crimp starts, in order to obtain a good crimp effect, first steel plate 17 is fixedly clamped by clamped beam 1 and upper fixed beam 19.Upper mould beam 18 and upper fixed beam are fixed in frame, and clamped beam 1 clamps steel plate under the driving of clamping cylinder.The reliable grip of clamped beam 1, can offset the transverse shifting in steel plate 17 crimp process, and therefore, the hydraulic control system of clamping cylinder 17 is extremely important for the plastic deformation of the processing of stable crimp and steel plate 17.Existing clamped beam is controlled by two single-action hydraulic cylinders and two double-acting hydraulic cylinders, jointly carried out the quick rising to clamped beam, work entered rising, clamping, pressurize, pressure release, the action of fast downlink series of process.In the course of the work, single-acting cylinder drives clamped beam to rise, and double acting cylinder can drive clamped beam to decline, and when the action of single-acting cylinder and double acting cylinder is asynchronous, easily causes the rod fracture of double acting cylinder, has potential safety hazard.
Disclosed in described background technique part, above-mentioned information is only for strengthening the understanding to background of the present invention, and therefore it can comprise the information do not formed prior art known to persons of ordinary skill in the art.
Summary of the invention
One object of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of can to steel plate reliable grip, the clamping cylinder hydraulic control device that piston rod can not be caused to damage.
Another object of the present invention is to provide a kind of steel plate pre-bending machine with this clamping cylinder hydraulic control device.
Additional aspect of the present invention and advantage will partly be set forth in the following description, and partly will become obvious from description, or can the acquistion by practice of the present invention.
According to an aspect of the present invention, a kind of clamping cylinder hydraulic control device, for steel plate pre-bending machine, comprise clamped beam, the lower lock piece that can move up and down, the clamping cylinder be connected with clamped beam, fuel tank, pressure source and accumulator, described pressure source and accumulator all can optionally be communicated with described clamping cylinder, with to fuel feeding in clamping cylinder, described clamped beam is provided with clamping part, the below at described lower lock piece can be supported in described clamping part, when described lower lock piece rises, described accumulator and pressure source can simultaneously to described clamping cylinder fuel feeding, clamped beam is driven synchronously to rise along with described lower lock piece to make described clamping cylinder, described lower lock piece can drive described clamped beam to move downward when declining, and make the hydraulic oil in described clamping cylinder enter into accumulator.
According to an embodiment of the present invention, the pressure transducer of the oil pressure size that can detect in described clamping cylinder is also comprised.
According to an embodiment of the present invention, between described accumulator and described clamping cylinder, be connected with two-way plug-in valve, described accumulator when described two-way plug-in valve is opened, can be made to be communicated with described clamping cylinder.
According to an embodiment of the present invention, the first switch valve is connected with between described accumulator and described two-way plug-in valve.
According to an embodiment of the present invention, describedly the second switch valve that described accumulator can be communicated with fuel tank is also comprised.
According to an embodiment of the present invention, the two ends of described clamped beam are respectively provided with a leading truck, and described clamped beam and described leading truck are formed and be slidably matched, and described clamping part can be resisted against described leading truck.
According to an embodiment of the present invention, the one-way valve that one the 3rd switch valve and prevents hydraulic oil from flowing backwards from described clamping cylinder to described 3rd switch valve is in series with between described pressure source and described clamping cylinder successively.
According to an embodiment of the present invention, all relief valve is connected with between described clamping cylinder and fuel tank and between described accumulator and fuel tank.
According to another aspect of the present invention, a kind of steel plate pre-bending machine, comprises above-mentioned clamping cylinder hydraulic control device.
As shown from the above technical solution, advantage of the present invention and good effect are:
Clamping cylinder hydraulic control device of the present invention, clamped beam can be driven to rise fast by accumulator, thus reduce the installed power of hydraulic system, by pressure source to clamping cylinder fuel feeding, clamping cylinder can being avoided because letting out the impact causing clamping force to decline in hydrovalve, ensureing the reliable grip to steel plate, and, move clamped beam by counterdie sill bolt to decline, do not need to arrange two-way cylinder, avoid the asynchronous problem causing cylinder piston rod to damage of multiple different types of cylinder action.
Accompanying drawing explanation
Describe its example embodiment in detail by referring to accompanying drawing, above-mentioned and further feature of the present invention and advantage will become more obvious.
Fig. 1 is to the schematic diagram that steel plate clamps in existing steel plate pre-bending machine;
Fig. 2 is the schematic diagram of the clamping cylinder hydraulic control device of the present invention one illustrative embodiments;
Fig. 3 is the schematic diagram that the clamped beam of the clamping cylinder hydraulic control device of the present invention one illustrative embodiments combines with lower lock piece.
In figure: 1, clamped beam; 101, clamping part; 2, clamping cylinder; 3, pressure transducer; 4, relief valve; 5, accumulator; 6, pressure gauge; 7, two-way plug-in valve; 8, the first switch valve; 9, relief valve; 10, one-way valve; 11, the 3rd switch valve; 12, fuel tank; 13, second switch valve; 14, relief valve; 15, leading truck; 16, lower lock piece; 17, steel plate; 18, upper mould beam; 19, fixed beam; 20, pre-bending master cylinder.
Embodiment
Described feature, structure or characteristic can be combined in one or more mode of execution in any suitable manner.In the following description, provide many details thus provide fully understanding embodiment of the present invention.But, one of skill in the art will appreciate that and can put into practice technological scheme of the present invention and not have in described specific detail one or more, or other method, assembly, material etc. can be adopted.In other cases, known features, material or operation is not shown specifically or describes to avoid fuzzy each aspect of the present invention.
See Fig. 1 to Fig. 3, the invention discloses a kind of clamping cylinder hydraulic control device, it can be used for steel plate pre-bending machine, comprises clamped beam 1, lower lock piece 16, clamping cylinder 2, fuel tank 12 and pressure source P0 and accumulator 5.Wherein, clamped beam 1, for coordinating with the fixed beam 19 of steel plate pre-bending machine, is used for clamping steel plate 17.Lower lock piece 16, for coordinating with the upper mould beam 18 of steel plate pre-bending machine, carries out pre-bending to steel plate.Clamping cylinder 2 is connected with clamped beam 1, and clamped beam 1 can be driven to rise to clamp steel plate 17.In the present embodiment, the quantity of clamping cylinder 2 is two, but this not limits the quantity of clamping cylinder 2, and the quantity of clamping cylinder 2 also can be one or more.
Lower lock piece 16 is connected on pre-bending master cylinder 20, lower lock piece 16 can move up and down under the drive of pre-bending master cylinder 20, instantly when lock piece 16 moves upward, can contact with steel plate 17, and by the effect of lower lock piece 16 and upper mould beam 18, pre-bending is carried out to steel plate 17, instantly when lock piece 16 drops to lower dead centre, it can depart from steel plate 17, so that steel plate 17 enters next step cycle action.
Pressure source P0 and accumulator 5 all can optionally be communicated with clamping cylinder 2, with to fuel feeding in clamping cylinder 2.As shown in Figure 2, be in series with one the 3rd switch valve 11 and an one-way valve 10 between pressure source P0 and clamping cylinder 2 successively, first pressure source P0 is connected to one the 3rd switch valve 11, then, then is connected in the oil circuit of clamping cylinder 2 by an one-way valve 10.Pressure source P0, when opening, can be communicated with clamping cylinder 2 by the 3rd switch valve 11, and the oil circuit between pressure source P0 and clamping cylinder 2 can cut off after cutting out by the 3rd switch valve 11.When the 3rd switch valve 11 is opened, hydraulic oil can enter into clamping cylinder 2 from pressure source P0.Certainly, the Placement between above-mentioned pressure source P0 and clamping cylinder 2 is only exemplary, such as, also only can be provided with one the 3rd switch valve 11 between pressure source P0 and clamping cylinder 2.The type of the 3rd switch valve 11 is not limit, and in the present embodiment, the 3rd switch valve is a two-position three way cut-off type electromagnetic direction valve, during its electromagnet Y1 dead electricity, 3rd switch valve 11 is in open mode, electromagnet Y1 obtain electric after, the 3rd switch valve 11 is in closed condition.
Between accumulator 5 and clamping cylinder 2, be connected with two-way plug-in valve 7, opening or closing of two-way plug-in valve 7 is controlled by the 4th switch valve 4.4th switch valve 4 is a two-position three way cut-off type electromagnetic direction valve, and when its electromagnet Y2 obtains electric, two-way plug-in valve 7 is in closed condition, and the oil circuit now between accumulator 5 and clamping cylinder 2 cuts off; When electromagnet Y2 dead electricity, two-way plug-in valve 7 is in open mode, and the oil circuit now between accumulator 5 with clamping cylinder 2 is communicated with.
A relief valve 9 can also be connected between clamping cylinder 2 with fuel tank 12, between accumulator 5 and fuel tank 12, be connected with a relief valve 14.Clamping cylinder 2 connects the pressure transducer 3 that can detect oil pressure size in this clamping cylinder 2.
Further, from Fig. 2 and Fig. 3, clamped beam 1 is provided with a clamping part 101, the below at lower lock piece 16 can be supported in this clamping part 101, drives this clamped beam 1 to move downward when lower lock piece 16 is declined.Specifically can see Fig. 3, in the present embodiment, the two ends of clamped beam 1 are respectively provided with a leading truck 15, and this clamped beam 1 and two leading trucks 15 are formed and are slidably matched, and clamped beam 1 can be slided up and down along leading truck 15.Further, clamped beam 1 upwards action time, this clamping part 101 can be supported in the below of leading truck 15, to ensure that clamped beam synchronously rises along leading truck.
When two-way plug-in valve 7 and the 3rd switch valve 11 are opened, accumulator 5 and pressure source P0 can simultaneously to clamping cylinder 2 fuel feeding, now clamping cylinder 2 has the trend driving clamped beam 1 to move upward, but, due to clamped beam 1 being provided with clamping part 101, this clamping part 101 is supported on leading truck 15, the motion of clamped beam 1 is made to be restricted and cannot to rise, when only lock piece 16 moves upward instantly, this clamped beam 1 synchronously rises in company with lower lock piece 16, instantly when lock piece 16 declines, clamped beam 1 also can decline in company with lower lock piece 16 together, the double acting cylinder declined for clamped beam 1 can be omitted thus, thoroughly avoid double acting cylinder in descending process because the asynchronous situation of rod fracture that causes of moving occurs.
When it should be pointed out that lower lock piece 16 F.F. is risen, clamped beam 1 also must rise along with lower lock piece 16 simultaneously and rapidly, and this just requires as clamping cylinder 2 provides sufficient fuel delivery.Because accumulator in present embodiment 5 can carry out quick high flow rate oil supply when rising fast to clamping cylinder 2, this just correspondingly can reduce the fuel delivery at pressure source P0 place, thus change the mode of all with oil hydraulic pump, clamping cylinder 2 being carried out to quick high flow rate oil supply in original hydraulic system, and then reduce the installed power of hydraulic system, simultaneously, when clamping cylinder 2 declines fast, reduce hydraulic shock phenomenon by accumulator 5, and
The two-way plug-in valve 7 arranged in present embodiment is larger compared to the switch valve flow of other types, can meet the quick fuel feeding demand of accumulator 5.Known see Fig. 2, between two-way plug-in valve 7 and accumulator 5, be also connected with first switch valve 8, when this first switch valve 8 obtains electric commutation, two-way plug-in valve 7 can be communicated with accumulator 5, thus, make to be provided with between clamping cylinder 2 with accumulator 5 oil circuit that Article 2 can be communicated with.This first switch valve 8 can be two-position three way cut-off type electromagnetic direction valve.Carry out pressure release after clamping cylinder pressurize completes, the first switch valve 8 obtains electric commutation, and the hydraulic oil in clamping cylinder 2 is recycled to accumulation of energy in accumulator 5, for the next fast forward action of clamped beam 1 provides pressure oil.The structure of the first switch valve 8 is not limit, and it also can adopt the switch valve of other types.
Between accumulator 5 and fuel tank 12, be also connected with a second switch valve 13, after this second switch valve 13 is opened, accumulator 5 can be communicated with fuel tank 12, the pressure oil in accumulator 5 is discharged in fuel tank 12, to carry out working service to this hydraulic system.In the present embodiment, second switch valve 13 is two-position three way cut-off type electromagnetic direction valve, but, it should be pointed out that the structure of this second switch valve 13 does not limit, as long as the pressure oil in accumulator 5 can be expelled to fuel tank 12.
The working procedure of the clamping cylinder hydraulic control device of present embodiment is as follows.
First, open two-way plug-in valve 7 and the 3rd switch valve 11, make the hydraulic oil in accumulator 5 and the hydraulic oil supplied by pressure source P0 is supplied in clamping cylinder 2.In this case, clamping cylinder 2 meeting applies thrust upwards to clamped beam 1, but the clamping part 101 due to clamped beam 1 is supported on lower lock piece 16, and when lower lock piece 16 does not move upward, clamped beam 1 also cannot move upward.
Next, make steel plate 17 enter into precalculated position and carry out pre-bending.After starting pre-bending master cylinder 20, this pre-bending master cylinder 20 drives lower lock piece 16 to move upward rapidly, in the process, because accumulator 5 can provide hydraulic oil compared with large discharge to clamping cylinder 2, make clamping cylinder 2 promote clamped beam 1 along with lower lock piece 16 and synchronously move upward.
When clamped beam 1 drives steel plate 17 close to fixed beam 19, the 4th switch valve 4 obtains electric commutation, and two-way plug-in valve 7 is closed, and the hydraulic oil in accumulator 5 can not enter into clamping cylinder 2.Now clamping cylinder 2 is by means of only pressure source P0 fuel feeding, and clamped beam 1 work is entered to rise, and the rate of climb slows down, and reduces compression shock during steel plate clamping.The method whether closely with steel plate 17 detecting this clamped beam 1 is not limit, such as corresponding displacement transducer can be set on clamped beam 1 or lower lock piece 16, this displacement transducer, sending a control signal close to during steel plate 17, can control the 4th switch valve 4 by this control signal and obtain electric commutation.
When clamped beam 1 continues to move upward, will coordinate with fixed beam and steel plate 17 be clamped.Oil pressure now in clamping cylinder 2 rises, and whether the oil pressure that pressure transducer 3 can detect in clamping cylinder 2 reaches requirement.After the oil pressure in clamping cylinder 2 reaches requirement, this clamped beam 1 enters clamping packing state, and pressure source P0 now continues fuel feeding in clamping cylinder 2, clamps insecure situation to avoid due to the hydraulic fluid leak in clamping cylinder 2.If the oil pressure in clamping cylinder 2 exceedes the setting pressure of relief valve 9, pressure oil can from relief valve 9 overflow to fuel tank 12.
After clamped beam 1 clamps steel plate 17, lower lock piece 16 rises, and carries out pre-bending to steel plate 17.The shaping rear system of pre-bending carries out pressurize, pre-bending master cylinder 20 pressure release after pressurize completes, the 3rd switch valve 11 obtains electric commutation, the oil circuit between cut-out pressure source P0 and clamping cylinder 2, first switch valve 8 obtains electric commutation, and the pressure oil in clamping cylinder 2 is back in accumulator 5 by the first switch valve 8.After pressure release completes, lower lock piece 16 drives clamped beam 1 to move downward, and only the 3rd switch valve 11 obtains electric commutation, and the pressure oil in clamping cylinder 2 passes through two-way plug-in valve 7 quick backflow in accumulator 5.For energy reserve is done in next prebending process action.
Also disclose a kind of steel plate pre-bending machine in present embodiment, this steel plate pre-bending machine comprises upper mould beam 18 and fixed beam 19, also comprises the clamping cylinder hydraulic control device of present embodiment.
In summary, the clamping cylinder hydraulic control device of the application has advantage.
First, acted on mutually with leading truck by the clamping part be arranged on clamped beam, clamped beam is enable tightly to follow the motion of lower lock piece when lower lock piece fast uplink and fast downlink, do not need on clamped beam, arrange two-way cylinder to move to drive clamped beam, avoid the phenomenon generation that two-way cylinder is pulled off.
Second, by arranging accumulator, make clamping cylinder can by a large amount of fuel feeding of accumulator when fast uplink, with in original system all by compared with the mode of oil hydraulic pump fuel feeding, the installed power of hydraulic system is declined, simultaneously when clamping cylinder fast downlink, the fluid accumulation of energy in accumulator Ethylene recov pressing system can also be utilized, while reducing hydraulic shock, can be again that fast forward action is supplied to pressure oil next time, there is the feature of efficient energy-saving.
3rd, by the leading role of leading truck to clamped beam, ensure that the synchronous operation of clamping cylinder, eliminate the proportional reversing valve in original hydraulic control system and displacement transducer, decrease electrical control point, this apparatus structure is simple, easy to maintenance, equipment failure rate is low, and reduces the maintenance difficulty of field worker to equipment.
4th, during clamping cylinder clamping pressurize, adopt the pressure source of high-pressure low-flow to carry out pressurize clamping, pressurize better effects if, solve because letting out brought pressure drop in hydrovalve in prior art, thus the stability of equipment when ensure that steel plate pre-bending, improve up-to-standard rate and the productivity of product.
Below illustrative embodiments of the present invention is illustrate and described particularly.Should be appreciated that, the invention is not restricted to disclosed mode of execution, on the contrary, the invention is intended to contain and be included in various amendment in the spirit and scope of claims and equivalent arrangements.

Claims (9)

1. a clamping cylinder hydraulic control device, for steel plate pre-bending machine, comprise clamped beam, the lower lock piece that can move up and down, the clamping cylinder be connected with clamped beam and fuel tank, it is characterized in that, also comprise: pressure source and accumulator, described pressure source and accumulator all can optionally be communicated with described clamping cylinder, with to fuel feeding in clamping cylinder, described clamped beam is provided with clamping part, the below at described lower lock piece can be supported in described clamping part, when described lower lock piece rises, described accumulator and pressure source can simultaneously to described clamping cylinder fuel feeding, clamped beam is driven synchronously to rise along with described lower lock piece to make described clamping cylinder, described lower lock piece can drive described clamped beam to move downward when declining, and make the hydraulic oil in described clamping cylinder enter into accumulator.
2. clamping cylinder hydraulic control device according to claim 1, is characterized in that, also comprises the pressure transducer that can detect oil pressure size in described clamping cylinder.
3. clamping cylinder hydraulic control device according to claim 2, is characterized in that, is connected with two-way plug-in valve between described accumulator and described clamping cylinder, and described accumulator can be made when described two-way plug-in valve is opened to be communicated with described clamping cylinder.
4. clamping cylinder hydraulic control device according to claim 3, is characterized in that, is connected with the first switch valve between described accumulator and described two-way plug-in valve.
5. clamping cylinder hydraulic control device according to claim 3, is characterized in that, also comprises the second switch valve that described accumulator can be communicated with fuel tank.
6. clamping cylinder hydraulic control device according to claim 1, is characterized in that, the two ends of described clamped beam are respectively provided with a leading truck, and described clamped beam and described leading truck are formed and be slidably matched, and described clamping part can be resisted against described leading truck.
7. clamping cylinder hydraulic control device according to claim 1, is characterized in that, the one-way valve being in series with the 3rd switch valve between described pressure source and described clamping cylinder successively and preventing hydraulic oil from flowing backwards to described 3rd switch valve from described clamping cylinder.
8. clamping cylinder hydraulic control device according to claim 1, is characterized in that, is all connected with relief valve between described clamping cylinder and fuel tank and between described accumulator and fuel tank.
9. a steel plate pre-bending machine, is characterized in that, comprises as the clamping cylinder hydraulic control device as described in arbitrary in claim 1 to 8.
CN201511031249.XA 2015-12-31 2015-12-31 Steel plate pre-bending machine and its clamping cylinder hydraulic control device Active CN105443453B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107559252A (en) * 2017-09-26 2018-01-09 广东生益科技股份有限公司 Multi cylinder flexibility sychronisation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107559252A (en) * 2017-09-26 2018-01-09 广东生益科技股份有限公司 Multi cylinder flexibility sychronisation
CN107559252B (en) * 2017-09-26 2019-08-27 广东生益科技股份有限公司 Multi cylinder flexibility synchronizing device

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