CN105619875A - High-speed hydraulic punching machine - Google Patents
High-speed hydraulic punching machine Download PDFInfo
- Publication number
- CN105619875A CN105619875A CN201610152207.XA CN201610152207A CN105619875A CN 105619875 A CN105619875 A CN 105619875A CN 201610152207 A CN201610152207 A CN 201610152207A CN 105619875 A CN105619875 A CN 105619875A
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- oil
- electromagnetism
- surplus valve
- cylinder
- oil pump
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Classifications
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- 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
- B30B15/166—Electrical control arrangements
-
- 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
- B30B15/22—Control arrangements for fluid-driven presses controlling the degree of pressure applied by the ram during the pressing stroke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
Abstract
A high-speed hydraulic punching machine comprises a machine bed and a sliding block and is characterized in that one end of an electronic ruler is fixed to the machine bed, the other end of the electronic ruler is connected to the sliding block, the sliding block is connected to a piston of a hydraulic cylinder and drives the piston to move downwards under the gravity effect, oil is directly sucked into a working chamber from an oil tank through the gravity, when the sliding block moves downwards to the set position, the electronic ruler drives a control system to enable double oil pumps to fast supply oil to the working chamber of the hydraulic cylinder simultaneously for driving the piston to drive the sliding block to fast move downwards for realizing high-speed punching, when the sliding block moves downwards to the lower limit position, the electronic ruler drives the control system again to enable one oil pump to stop supplying the oil, and the other oil pump and an energy accumulator fast supply oil to an oil return chamber of the hydraulic cylinder for enabling the piston to fast return to another cycle. The high-speed hydraulic punching machine has the advantages of being stable, safe, mute, friendly to environment, practical, wide in application range, easy and convenient to operate, easy to control and compact in structure, saving the energy and reducing emission, and work-pieces are attractive.
Description
Technical field
The present invention relates to a kind of mechanical means, especially a kind of pressing equipment, specifically a kind of can high speed stamping again can the multifunctional high speed hydraulic pressure punch press of low-speed tensile.
Background technology
At present, punch press is rotary machine structure mostly, and its noise is big, safety coefficient is low, complex structure, easily damages, and function singleness, can only carry out punching press, owing to by structure influence, the drawing velocity of large-tonnage punch press is limited, and the punching press ability of high velocity ram machine is limited. It is little that hydraulic efficiency system has noise, stable working, the advantage that structure is simple, tonnage is big, but owing to being limit by design of Hydraulic System, the speed of existing hydraulic pressure punch press cannot improve, being generally every minute tens, 20 times, efficiency is not high, therefore, a kind of large-tonnage (more than 100 tons) high-speed hydraulic punch press of design makes it to realize every minute high speed stamping of more than 60 times, low-speed tensile can be realized again, it is achieved a machine is multiplex simultaneously, be the key of hydraulic pressure punch press upgrading.
Summary of the invention
It is an object of the invention to for existing hydraulic pressure punch press speed low, the problem of function singleness, design one can realize every minute more than 60 times, can realize again the high-speed hydraulic punch press of low-speed tensile simultaneously.
The technical scheme of the present invention is:
A kind of high-speed hydraulic punch press, it comprises lathe bed and slide block, it is characterized in that one end of electronic ruler is fixed on lathe bed, the other end is connected with slide block, slide block is connected with hydrauliccylinder piston, slide block drive under gravity descent of piston utilize gravity directly from fuel tank oil suction to working chamber, when slide block down makes two oil pump realize high speed stamping to hydraulic cylinder works chamber quick fuel feeding driven plunger band movable slider is descending fast to electronic ruler driving control system during desired location simultaneously, when slide block down is to lower position, electronic ruler again driving control system make an oil pump fuel cut-off, make another oil pump and energy storage to the quick fuel feeding of hydro-cylinder oil back chamber thus make piston rapid return enter another circulation.
Described hydro-cylinder is controlled by hydraulic efficiency system, hydraulic efficiency system comprises the first oil pump 1, the 2nd oil pump 2 and energy storage 3, the output terminal of the first oil pump 1 is directly connected with the working chamber of hydro-cylinder 4 by pipeline, being provided with the first electromagnetism surplus valve YV1 on the delivery conduit of the first oil pump 1, the working chamber of hydro-cylinder 4 is also connected with fuel tank by being provided with the pipeline of controlled check valve 5; Controlled check valve is controlled by the 3rd electromagnetism surplus valve YV3, and the 3rd electromagnetism surplus valve YV3 and energy storage 3 are all connected in parallel on the delivery conduit of the 2nd oil pump 2, is also provided with the 2nd electromagnetism surplus valve YV2 and the 5th electromagnetism surplus valve YV5 on the delivery conduit of the 2nd oil pump; When 5th electromagnetism surplus valve YV5 obtains electric, the 2nd oil pump 2 is oil-filled to the working chamber of hydro-cylinder 4 fast, then makes the hydraulic efficiency oil rapid return fuel tank 6 in described working chamber during dead electricity; The oil back chamber of hydro-cylinder 4 is connected with the 3rd electromagnetism surplus valve YV3 by pipeline so that the pressure oil in energy storage 3 and the 2nd oil pump 2 enters oil back chamber fast thus makes piston rapid return; Connect oil back chamber pipeline on be also at least installed in parallel a 4th electromagnetism surplus valve YV4, the 4th electromagnetism surplus valve YV4 obtain electric after, the oil in oil back chamber directly flows back to fuel tank 6.
The pipeline of described connection oil back chamber is also installed in parallel the adjustable electromagnetic surplus valve YV6 that regulates oil return speed.
Also being parallel with material returned cylinder 7 on the delivery conduit of the 2nd described oil pump 2, material returned cylinder is controlled by the 7th electromagnetism surplus valve YV7, the 8th electromagnetism surplus valve YV8 and the 9th electromagnetism surplus valve YV9; 7th electromagnetism surplus valve YV7, the 8th electromagnetism surplus valve YV8 obtain electric, and material returned cylinder 7 gone the material returned, and the 9th electromagnetism surplus valve YV9 obtains electric, and material returned cylinder is descending to hold workpiece.
The useful effect of the present invention:
The present invention has the advantage of the practical extensive control workpiece simple and easy to operate compact construction energy-saving and emission-reduction attractive in appearance of steady safe and silent environmental protection.
1., steadily without vibrations during the hydraulic pressure punch ram of the present invention, operational safety, it is not easy to cause work accident, power system is provided with excess flow protection device, it is not easy to break fuselage accessory and mould, greatly improves the safety performance of equipment.
2. the hydraulic pressure punch press of the present invention does not have flywheel and crank, and during running punching press, noise is low, and tranquility environmental protection, improves the Working environment of employee greatly.
3. the hydraulic system working pressure of the present invention is adjustable, provides flexible stamping press for different die workpieces, and being rushed workpiece not easily has slight crack, and processing work is more accurate attractive in appearance.
4. the hydraulic pressure punch press of the present invention can adjust the stroke of Punching slider and upper and lower zero position very easily, and for different die workpieces, adjustment drawing velocity, carries out punching production rapidly and efficiently.
5. different moulds loaded onto by the hydraulic pressure punch press of the present invention, it is possible to carrying out punching and cut out material and cut angle calendering stretch function and load onto bending cutter and can also make bending press and use, a machine is multiplex, practical extensively.
6. the Controlling System of the present invention establishes automatic semi-automatic point to move shelves, automatic transmission can Continuous maching band material, semi-automatic shelves can to shelves position batch machining. The dynamic shelves of point can make Punching slider stop optional position, up and down to the convenient and swift accurate safety of mould during installation mold, can see that line is to mould accurate punching press single-piece during operation punching press, and complete machine uses very flexible and convenient.
7. the hydraulic efficiency system of the hydraulic pressure punch press of the present invention adopts flexible electric control, is easy to realize linkage control automatically with the peripheral equipment such as automatic feed mechanism, is convenient to automatic assembly line and produces.
8. the hydraulic pressure punch press of the present invention does not have huge fuselage and flywheel, complete machine steelframe airframe structure is compact, place shared by identical stamping press punch press is less, the steel consumed are less, and do not have to cast the energy consumption and blowdown brought for two times, greatly reduce enterprise to consume and society's resource, reach the effect of energy-saving and emission-reduction.
9. the hydraulic pressure punch press complete machine structure of the present invention is simple, and frame adopts high-quality steel plate to be welded, and sturdy and durable through aging strengthening model, parts are reliable and stable, and the long-time less fault of equipment is run.
10. the hydraulic pressure punch press complete machine of the present invention adopts the C type aditus laryngis frame of standard punch press, general lock mould handle Punching slider, the working plate of standard, and various tradition punch press hardware stamping mould can be made general. Adopt the foot-operated control of hand push button, do not change the operating habit of employee.
The dark larynx punch press of the hydraulic pressure of 11. the present invention adopts C type deep throat inlet machine body, and on whole plate, machine is without processing dead angle, is punch press first choice of big panel beating batch punch process.
The hydropress of 12. the present invention belongs to universal type pressing machine, is applicable to the punching press work such as blanking, punching are bending, stretching. Extensively for automobile, agricultural machinery, motor, electrical equipment, instrument mechanical component, instrument and haberdashery and hardware industry.
The body parts of 13. the present invention is welded by worktable and oil cylinder retaining plate and stiffening web plate. Being milled with T-slot on worktable, for upper screw rod fixed mould, in the positive Middle face of fuselage, guide rail is equipped with in both sides, the bolt of adjustment fuselage both sides, the precision of adjustable work slide block. Two material returned supports are also equipped with in both sides, adjust thing point of suppon, can the goods in mould or waste material be laid.
The transmission mechanism of 14. the present invention drives oil pump by the motor being contained in rear, and hydraulic efficiency oil arrives hydraulic manifold block by oil pump, by hydraulicvalve hydraulic control oil, passes to hydraulic ram, and band movable slider is moved up and down by hydraulic ram. Energy storage device is that hydro-cylinder is oil-filled fast, thus reaches effect at a high speed. Regulate the surplus valve on hydraulic manifold block, the pressure of adjustable slide work.
The slide block of 15. the present invention is the topworks of pressing machine stamped workpieces. Its stroke is by the stroke transmission of hydro-cylinder. Slide body slides in the square profile of fuselage guide rail, and upper surface is connected with hydraulic cylinder piston rod by flange. Slide body has mould pressing plate, is used for clamping mold. Stripper is also housed in slide body, and during adjustment discharging position, slide block must at upper dead center position.
The operating mechanism of 16. the present invention adopts foot-operated formula electrical installation, controls electrical equipment by push-switch, comes to hydraulicvalve control electricity, thus hydraulic control cylinder band movable slider is walked about.
Electrical control cubicles is equipped with in the left side of 17. the present invention, adopts the start and stop of hand push button control motor. Manual regulation switch, the working order of control machine, (point dynamic, semi-automatic, full-automatic, stretching, punching).
Accompanying drawing explanation
Fig. 1 is the contour structures schematic diagram of the present invention.
Fig. 2 is one of hydraulic schematic diagram of the present invention.
Fig. 3 is the two of the hydraulic schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment one.
As shown in Figure 1, 2.
A kind of high-speed hydraulic punch press, it comprises lathe bed 8 and slide block 9, one end of electronic ruler 10 is fixed on lathe bed 8, the other end is connected with slide block 9, slide block 8 is connected with the piston in hydro-cylinder 4, slide block 8 drive under gravity descent of piston utilize gravity directly from fuel tank 6 oil suction to working chamber, when slide block 9 goes downwards to desired location, electronic ruler 10 driving control system makes two oil pump realize high speed stamping to hydraulic cylinder works chamber quick fuel feeding driven plunger band movable slider is descending fast simultaneously, when slide block down is to lower position, electronic ruler 10 again driving control system make an oil pump fuel cut-off, make another oil pump and energy storage 3 to the hydro-cylinder 4 quick fuel feeding of oil back chamber thus make piston rapid return enter another circulation. being provided with material returned cylinder 7 in the lower section of worktable 11, material returned cylinder 7 is also by an oil pump fuel feeding in two oil pumps, it is achieved retainer and top material, as shown in Figure 1. the hydro-cylinder of the present embodiment is controlled by the hydraulic efficiency system shown in Fig. 2, the hydraulic efficiency system of Fig. 2 comprises the first oil pump 1, the 2nd oil pump 2 and energy storage 3, the output terminal of the first oil pump 1 is directly connected with the working chamber of hydro-cylinder 4 by pipeline, being provided with the first electromagnetism surplus valve YV1 on the delivery conduit of the first oil pump 1, the working chamber of hydro-cylinder 4 is also connected with fuel tank by being provided with the pipeline of controlled check valve 5, controlled check valve is controlled by the 3rd electromagnetism surplus valve YV3, and the 3rd electromagnetism surplus valve YV3 and energy storage 3 are all connected in parallel on the delivery conduit of the 2nd oil pump 2, is also provided with the 2nd electromagnetism surplus valve YV2 and the 5th electromagnetism surplus valve YV5 on the delivery conduit of the 2nd oil pump, when 5th electromagnetism surplus valve YV5 obtains electric, the 2nd oil pump 2 is oil-filled to the working chamber of hydro-cylinder 4 fast, then makes the hydraulic efficiency oil rapid return fuel tank 6 in described working chamber during dead electricity, the oil back chamber of hydro-cylinder 4 is connected with the 3rd electromagnetism surplus valve YV3 by pipeline so that the pressure oil in energy storage 3 and the 2nd oil pump 2 enters oil back chamber fast thus makes piston rapid return, connect oil back chamber pipeline on be also at least installed in parallel a 4th electromagnetism surplus valve YV4, the 4th electromagnetism surplus valve YV4 obtain electric after, the oil in oil back chamber directly flows back to fuel tank 6. the pipeline of described connection oil back chamber is also installed in parallel the adjustable electromagnetic surplus valve YV6 that regulates oil return speed. also being parallel with material returned cylinder 7 on the delivery conduit of the 2nd described oil pump 2, material returned cylinder is controlled by the 7th electromagnetism surplus valve YV7, the 8th electromagnetism surplus valve YV8 and the 9th electromagnetism surplus valve YV9, 7th electromagnetism surplus valve YV7, the 8th electromagnetism surplus valve YV8 obtain electric, and material returned cylinder 7 gone the material returned, and the 9th electromagnetism surplus valve YV9 obtains electric, and material returned cylinder is descending to hold workpiece.
The hydraulic circuit of the present embodiment can provide the stamping press of 125-500 ton, every minute drawing velocity of more than 60 times.
In the working process of the present embodiment:
1, standby.
Magnetic valves all in system is all in the state of dead electricity. Now oil pump 1,2 output hydraulic pressure oil passes through YV1, YV2 electromagnetism surplus valve, direct oil return box, and namely hydraulic efficiency system is in and treats working order.
2, slide block fast under.
Time under slide block 9 is fast, YV1, YV2, YV4, YV6 magnetic valve simultaneously electric. So, the hydraulic efficiency oil that oil pump 1 exports directly leads to into cylinder upper cavity oil through YV1 magnetic valve, and the oil of fuel tank 6 li is by controlled check valve 5 simultaneously, enters in hydraulic cylinder works chamber. When arriving the speed change point of Operation system setting (or be pressure point, measure by electronic ruler 10 and determine), valve YV5 is energized, and pump 2 is simultaneously oil-filled to hydraulic cylinder works chamber thus reaches punching fast and pressurization fast, and valve YV4 and valve YV6 is the quick oil return in lower chamber.
3, slide block slow under.
Now magnetic valve YV1 is energized, and the oil that therefore oil pump 1 exports, by YV1 valve, enters cylinder upper cavity oil, and under oil cylinder, the oil in chamber returns to fuel tank by valve 4, and valve YV4 presses taking YV6 as adjustable lower back lining, thus reaches the effect under slowly.
4, backhaul and off-load.
During backhaul, magnetic valve YV3 obtains electric and opens check valve 5, and the oil of energy storage device 3 can enter the oil back chamber (lower chamber) of hydro-cylinder, the oil in hydraulic cylinder works chamber (upper chamber) directly from check valve 5 oil return box 6,
5, hydro-pump 2 is energy storage device repairing, and surplus valve 2 regulates pressure.
6, YV7, YV8, YV9 work for controlling material returned cylinder 7, YV8, YV9 are the upper and lower work of material returned cylinder, YV7 is for chamber oil under conversion material returned cylinder is by relief valve oil return box, when under material returned cylinder, chamber is stressed, the workpiece that just can hold stretching important document, slide block and stretching presses down past for material returned cylinder.
The each electromagnetic valve work state of the present embodiment and function contrast be:
| Action | YV1 | YV2 | YV3 | YV4 | YV5 | YV6 | YV7 | YV8 | YV9 |
| Punching fast | + | + | + | + | |||||
| Rush at a slow speed | + | ||||||||
| Backhaul | + | ||||||||
| On taking blame for others | + | + | |||||||
| Take blame for others down | + | + | + |
Embodiment two.
As shown in Figure 1,3.
The difference of the present embodiment and embodiment one is that hydraulic circuit is distinguished to some extent, owing to the pressure provided less (less than 100 tons) its principle of work is identical with embodiment equivalence, it is possible to adopt the hydraulic circuit of embodiment one. The hydraulic system principle figure of the present embodiment is as shown in Figure 3.
The working process of the present embodiment is:
1, standby.
Magnetic valves all in system is all in the state of dead electricity. The hydraulic efficiency oil that now oil pump exports is by YV1, YV2 direct oil return box of electromagnetism surplus valve, and namely hydraulic efficiency system is in and treats working order.
2, slide block fast under.
Time under slide block is fast, YV1, YV2, YV3, YV5 magnetic valve simultaneously electric. So, the hydraulic efficiency oil that oil pump exports directly leads to into cylinder upper cavity oil through YV1 magnetic valve, and under oil cylinder, chamber oil is back to energy storage device, and enters upper chamber by YV2 valve, thus reaches quick punching press,
3, slide block slow under
Now YV1, YV3 magnetic valve energising, the oil that therefore oil pump exports, by YV1 valve, enters cylinder upper cavity oil, and under oil cylinder, the oil in chamber is directly back to energy storage device.
4, backhaul and off-load.
YV4 magnetic valve energising during backhaul, the oil of energy storage device can enter chamber under oil cylinder, and the oil of cylinder upper cavity oil is from valve YV4 oil return box.
5, hydro-pump 2 is energy storage device 3 repairing, and surplus valve YV5 regulates pressure.
The each magnetic valve of the present embodiment and function contrast:
| Action | YV1 | YV2 | YV3 | YV4 | YV5 |
| Punching fast | + | + | + | ||
| Rush at a slow speed | + | + | |||
| Backhaul | + | + |
Part that the present invention does not relate to is all same as the prior art maybe can adopt prior art to be realized.
Claims (4)
1. a high-speed hydraulic punch press, it comprises lathe bed and slide block, it is characterized in that one end of electronic ruler is fixed on lathe bed, the other end is connected with slide block, slide block is connected with hydrauliccylinder piston, slide block drive under gravity descent of piston utilize gravity directly from fuel tank oil suction to working chamber, when slide block down makes two oil pump realize high speed stamping to hydraulic cylinder works chamber quick fuel feeding driven plunger band movable slider is descending fast to electronic ruler driving control system during desired location simultaneously, when slide block down is to lower position, electronic ruler again driving control system make an oil pump fuel cut-off, make another oil pump and energy storage to the quick fuel feeding of hydro-cylinder oil back chamber thus make piston rapid return enter another circulation.
2. high-speed hydraulic punch press according to claim 1, it is characterized in that described hydro-cylinder is controlled by hydraulic efficiency system, hydraulic efficiency system comprises the first oil pump (1), the 2nd oil pump (2) and energy storage (3), the output terminal of the first oil pump (1) is directly connected with the working chamber of hydro-cylinder (4) by pipeline, being provided with the first electromagnetism surplus valve (YV1) on the delivery conduit of the first oil pump (1), the working chamber of hydro-cylinder (4) is also connected with fuel tank by being provided with the pipeline of controlled check valve (5); Controlled check valve is controlled by the 3rd electromagnetism surplus valve (YV3), 3rd electromagnetism surplus valve (YV3) and energy storage (3) are all connected in parallel on the delivery conduit of the 2nd oil pump (2), are also provided with the 2nd electromagnetism surplus valve (YV2) and the 5th electromagnetism surplus valve (YV5) on the delivery conduit of the 2nd oil pump; When 5th electromagnetism surplus valve (YV5) obtains electric, the 2nd oil pump (2) is oil-filled to the working chamber of hydro-cylinder (4) fast, then makes hydraulic efficiency oil rapid return fuel tank (6) in described working chamber during dead electricity; The oil back chamber of hydro-cylinder (4) is connected with the 3rd electromagnetism surplus valve (YV3) by pipeline so that the pressure oil in energy storage (3) and the 2nd oil pump (2) enters oil back chamber fast thus makes piston rapid return; Connect oil back chamber pipeline on be also at least installed in parallel a 4th electromagnetism surplus valve (YV4), the 4th electromagnetism surplus valve (YV4) electric after, the oil in oil back chamber directly flows back to fuel tank (6).
3. high-speed hydraulic punch press according to claim 2, is characterized in that also being installed in parallel the adjustable electromagnetic surplus valve (YV6) that regulates oil return speed on the pipeline of described connection oil back chamber.
4. high-speed hydraulic punch press according to claim 2, it is characterized in that also being parallel with material returned cylinder (7) on the delivery conduit of the 2nd described oil pump (2), material returned cylinder is controlled by the 7th electromagnetism surplus valve (YV7), the 8th electromagnetism surplus valve (YV8) and the 9th electromagnetism surplus valve (YV9); 7th electromagnetism surplus valve (YV7), the 8th electromagnetism surplus valve (YV8) electric, material returned cylinder (7) is upper go the material returned, the 9th electromagnetism surplus valve (YV9) electric, material returned cylinder is descending to hold workpiece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152207.XA CN105619875B (en) | 2016-03-17 | 2016-03-17 | High-speed hydraulic punching machine |
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|---|---|---|---|
| CN201610152207.XA CN105619875B (en) | 2016-03-17 | 2016-03-17 | High-speed hydraulic punching machine |
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| CN105619875A true CN105619875A (en) | 2016-06-01 |
| CN105619875B CN105619875B (en) | 2017-04-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734811A (en) * | 2016-10-20 | 2017-05-31 | 中机锻压江苏股份有限公司 | A kind of composite molding hydraulic press |
| CN109488661A (en) * | 2018-12-07 | 2019-03-19 | 浙江鼎诚炉业科技有限公司 | A kind of step heating-furnace hydraulic control system and method |
| CN109488662A (en) * | 2018-12-07 | 2019-03-19 | 浙江鼎诚炉业科技有限公司 | A kind of step heating-furnace hydraulic control system |
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
| CN111706559A (en) * | 2020-07-08 | 2020-09-25 | 天津市天锻压力机有限公司 | Quick stamping hydraulic system |
| CN112770853A (en) * | 2018-10-01 | 2021-05-07 | 萨尔瓦尼尼意大利股份公司 | Sheet metal processing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106734811A (en) * | 2016-10-20 | 2017-05-31 | 中机锻压江苏股份有限公司 | A kind of composite molding hydraulic press |
| CN112770853A (en) * | 2018-10-01 | 2021-05-07 | 萨尔瓦尼尼意大利股份公司 | Sheet metal processing machine |
| CN109488661A (en) * | 2018-12-07 | 2019-03-19 | 浙江鼎诚炉业科技有限公司 | A kind of step heating-furnace hydraulic control system and method |
| CN109488662A (en) * | 2018-12-07 | 2019-03-19 | 浙江鼎诚炉业科技有限公司 | A kind of step heating-furnace hydraulic control system |
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| CN111706559A (en) * | 2020-07-08 | 2020-09-25 | 天津市天锻压力机有限公司 | Quick stamping hydraulic system |
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| CN105619875B (en) | 2017-04-12 |
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