CN104999048A - Booster-type mode-locked hydraulic mechanism of heavy die casting machine - Google Patents
Booster-type mode-locked hydraulic mechanism of heavy die casting machine Download PDFInfo
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- CN104999048A CN104999048A CN201510467732.6A CN201510467732A CN104999048A CN 104999048 A CN104999048 A CN 104999048A CN 201510467732 A CN201510467732 A CN 201510467732A CN 104999048 A CN104999048 A CN 104999048A
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Abstract
A booster-type mode-locked hydraulic mechanism of a heavy die casting machine comprises a mode-locked oil cylinder, a booster oil cylinder, a mode-locked cartridge valve, a booster oil return cartridge valve, a booster reset cartridge valve, a mode-open cartridge valve, a mode-locked oil return cartridge valve, a mode-locked electromagnetic direction valve, a booster reset electromagnetic direction valve, a mode-open electromagnetic direction valve, a mode-locked one-way valve, a mode-open oil return electromagnetic direction valve, a mode-open oil return shuttle valve, a mode-open oil return cartridge valve, a booster electromagnetic direction valve, a booster cartridge valve, a booster reset oil return cartridge valve, a stroke detection device and a pipeline. The mechanism starts with oil pressure in the mode-locked oil cylinder; on the premise that system pressure is unchanged, pressure in the mode-locked oil cylinder is changed in a booster mode; on the basis that displacement of an oil pump is not increased and the system pressure does not need to be increased, the work efficiency can be improved, energy consumption is reduced, and machine cost is reduced. The booster-type mode-locked hydraulic mechanism has the characteristics of being simple and reasonable in structure, reliable in performance, low in manufacturing cost, easy to produce and obtain, high in work efficiency, little in energy consumption and the like.
Description
Technical field
The present invention relates to a kind of heavy die casting machine, specifically a kind of booster-type locked mode hydraulic mechanism of heavy die casting machine.
Background technology
Heavy die casting machine requires steep increasing to clamp force, and its hydraulic system pressure keeps stable.Because Mode-locking oil cylinder strengthens, decline obviously to not allow lock opening speed.Conventional method adds large pumping station output flow, if accompanying drawing 1 is a kind of common locked mode hydraulic mechanism schematic diagram, but this method defect is obvious: 1, need increase power of motor, strengthens the specification etc. of the hydraulic part such as oil pump, fuel tap and pipeline, system difficulty obviously strengthens, 2, because hardware improves, design and develop difficulty and strengthen, cause machine cost obviously to increase, 3, because power of motor strengthens, energy consumption also strengthens, and forming section is wasted, and can not meet the user demand of user.Therefore, further improvement is necessary.
Summary of the invention
Object of the present invention aims to provide a kind of simple and reasonable, dependable performance, low cost of manufacture, easily produces, easily to realize and operating efficiency is high, the booster-type locked mode hydraulic mechanism of the heavy die casting machine of less energy consumption, to overcome weak point of the prior art.
The booster-type locked mode hydraulic mechanism of a kind of heavy die casting machine designed by this object, is characterized in that: comprise Mode-locking oil cylinder, pressurizing cylinder, locked mode inserted valve, supercharging oil return inserted valve, supercharging reset inserted valve, die sinking inserted valve, locked mode oil return inserted valve, locked mode electromagnetic direction valve, supercharging reset electromagnetic direction valve, die sinking electromagnetic direction valve, locked mode check valve, die sinking oil return electromagnetic direction valve, die sinking oil return shuttle valve, die sinking oil return inserted valve, supercharging electromagnetic direction valve, supercharging inserted valve, supercharging reset oil return inserted valve, device for detecting distance of travel and pipeline; Described Mode-locking oil cylinder and pressurizing cylinder are for distribute up and down, and wherein Mode-locking oil cylinder is placed in top, and pressurizing cylinder is placed in below and the two head and the tail is communicated with.
Sized by described pressurizing cylinder divides two sections and inside is provided with charged piston, in the large section that charged piston is slidably arranged in pressurizing cylinder and one end is connected with charged piston bar, the other end is connected with test rod, charged piston bar is slidably arranged in the segment of pressurizing cylinder, test rod stretches out outside pressurizing cylinder, and pressurizing cylinder inside is also provided with builds pressure chamber, supercharging oil back chamber and supercharging oil suction chamber; Described Mode-locking oil cylinder inside is provided with locking piston bar, locked mode rodless cavity and locked mode rod chamber, and the segment of pressurizing cylinder is communicated with locked mode rodless cavity.
The A mouth of described die sinking oil return inserted valve is communicated with locked mode rodless cavity, and B mouth is communicated with fuel tank; The B hole of die sinking oil return electromagnetic direction valve is communicated with the control mouth of die sinking oil return shuttle valve; Pressure port and the locked mode rodless cavity of die sinking oil return shuttle valve connection spool are connected state in its natural state; The spool chamber of described die sinking oil return inserted valve disconnects with locked mode rodless cavity when die sinking electromagnetic direction valve obtains electric and is communicated with fuel tank, and die sinking oil return inserted valve realizes when its A mouth is subject to certain pressure automatically opening.
Described die sinking inserted valve is communicated with locked mode oil return inserted valve and the two control by die sinking electromagnetic direction valve; Wherein, the A hole of die sinking electromagnetic direction valve is communicated with the core chamber of die sinking inserted valve, and B hole is communicated with the core chamber of locked mode oil return inserted valve; The A mouth of die sinking inserted valve is communicated with the A mouth of locked mode oil return inserted valve and the two is communicated with the locked mode rod chamber of Mode-locking oil cylinder after being communicated with.
Described supercharging oil return inserted valve is communicated with supercharging reset inserted valve and the two control by supercharging reset electromagnetic direction valve; Wherein, the A hole of supercharging reset electromagnetic direction valve is communicated with the spool chamber of supercharging reset inserted valve, and B hole is communicated with the spool chamber of supercharging oil return inserted valve; The A mouth of supercharging reset inserted valve is communicated with the A mouth of supercharging oil return inserted valve and the two is communicated with the supercharging oil back chamber of pressurizing cylinder after being communicated with.
Described supercharging inserted valve is communicated with supercharging reset oil return inserted valve and the two control by supercharging electromagnetic direction valve; Wherein, the A hole of supercharging electromagnetic direction valve is communicated with the spool chamber of supercharging inserted valve, and B hole is communicated with the spool chamber of supercharging reset oil return inserted valve; The A mouth of supercharging inserted valve is communicated with the A mouth of supercharging reset oil return inserted valve and the two is communicated with the supercharging oil suction chamber of pressurizing cylinder after being communicated with.
Described locked mode inserted valve is by the control of locked mode electromagnetic direction valve; Wherein, the A hole of locked mode electromagnetic direction valve is communicated with the spool chamber of locked mode inserted valve, and the A mouth of locked mode inserted valve is communicated with locked mode check valve, and the oil-out of locked mode check valve is communicated with the locked mode rodless cavity of Mode-locking oil cylinder.
Described pressurizing cylinder inside is provided with charged piston, and charged piston left end is connected with charged piston bar, and right-hand member is connected with test rod; Described device for detecting distance of travel to be arranged on test rod and to determine whether charged piston resets by the stroke detecting test rod.
The present invention is by the improvement of said structure, start with from the oil pressure in Mode-locking oil cylinder, ensureing under the prerequisite that system pressure is constant, the mode of employing supercharging changes the pressure in Mode-locking oil cylinder, neither increasing oil pump capacity, do not need again to improve on the basis of system pressure, can increase work efficiency, reduce energy consumption, reduce machine cost.It has simple and reasonable, dependable performance, and low cost of manufacture is easily produced, and easily realizes and the features such as operating efficiency is high, less energy consumption, practical.
Accompanying drawing explanation
Fig. 1 is a structure principle chart of prior art.
Fig. 2 is one embodiment of the invention structure principle chart.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
See Fig. 2, the booster-type locked mode hydraulic mechanism of this heavy die casting machine, comprise Mode-locking oil cylinder F1, pressurizing cylinder F2, locked mode inserted valve V1, supercharging oil return inserted valve V2, supercharging reset inserted valve V3, die sinking inserted valve V4, locked mode oil return inserted valve V5, locked mode electromagnetic direction valve V6, supercharging reset electromagnetic direction valve V7, die sinking electromagnetic direction valve V8, locked mode check valve V9, die sinking oil return electromagnetic direction valve V10, die sinking oil return shuttle valve V11, die sinking oil return inserted valve V12, supercharging electromagnetic direction valve V14, supercharging inserted valve V15, supercharging reset oil return inserted valve V16, device for detecting distance of travel C1 and pipeline.
Specifically, Mode-locking oil cylinder F1 and pressurizing cylinder F2 is for distribute up and down, and wherein Mode-locking oil cylinder F1 is placed in top, and pressurizing cylinder F2 is placed in below and the two head and the tail is communicated with; Sized by described pressurizing cylinder F2 divides two sections and inside is provided with charged piston 1, in the large section that charged piston 1 is slidably arranged in pressurizing cylinder F2 and one end is connected with charged piston bar 2, the other end is connected with test rod 3, charged piston bar 2 is slidably arranged in the segment of pressurizing cylinder F2, test rod 3 stretches out outside pressurizing cylinder F2, and pressurizing cylinder F2 inside is also provided with builds pressure chamber 7, supercharging oil back chamber 8 and supercharging oil suction chamber 9; Described Mode-locking oil cylinder F1 inside is provided with locking piston bar 4, locked mode rodless cavity 5 and locked mode rod chamber 6, and the segment of pressurizing cylinder F2 is communicated with locked mode rodless cavity 5.
The A mouth of die sinking oil return inserted valve V12 is communicated with locked mode rodless cavity 5, and B mouth is communicated with fuel tank; The B hole of die sinking oil return electromagnetic direction valve V10 is communicated with the control mouth of die sinking oil return shuttle valve V11; Pressure port and the locked mode rodless cavity 5 of die sinking oil return shuttle valve V11 connection spool are connected state in its natural state; The spool chamber of described die sinking oil return inserted valve V12 disconnects with locked mode rodless cavity 5 when die sinking electromagnetic direction valve V10 obtains electric and is communicated with fuel tank, and die sinking oil return inserted valve V12 realizes when its A mouth is subject to certain pressure automatically opening.
More particularly, keep closed condition under die sinking oil return inserted valve V12 normal condition always.Only have when die sinking electromagnetic direction valve V10 obtains electric time, the spool chamber of die sinking oil return inserted valve V12 disconnects with the locked mode rodless cavity 5 of Mode-locking oil cylinder F1 and is communicated with fuel tank immediately, and like this, die sinking oil return inserted valve V12 then can open when its A mouth is subject to certain pressure.
In said structure, die sinking inserted valve V4 is communicated with locked mode oil return inserted valve V5 and the two control by die sinking electromagnetic direction valve V8; Wherein, the A hole of die sinking electromagnetic direction valve V8 is communicated with the core chamber of die sinking inserted valve V4, and B hole is communicated with the core chamber of locked mode oil return inserted valve V5; The A mouth of die sinking inserted valve V4 is communicated with the A mouth of locked mode oil return inserted valve V5 and the two is communicated with the locked mode rod chamber 6 of Mode-locking oil cylinder F1 after being communicated with.
Supercharging oil return inserted valve V2 is communicated with supercharging reset inserted valve V3 and the two control by supercharging reset electromagnetic direction valve V7; Wherein, the A hole of supercharging reset electromagnetic direction valve V7 is communicated with the spool chamber of supercharging reset inserted valve V3, and B hole is communicated with the spool chamber of supercharging oil return inserted valve V2; The A mouth of supercharging reset inserted valve V3 is communicated with the A mouth of supercharging oil return inserted valve V2 and the two is communicated with the supercharging oil back chamber 8 of pressurizing cylinder F2 after being communicated with.
Supercharging inserted valve V15 is communicated with supercharging reset oil return inserted valve V16 and the two control by supercharging electromagnetic direction valve V14; Wherein, the A hole of supercharging electromagnetic direction valve V14 is communicated with the spool chamber of supercharging inserted valve V15, and B hole is communicated with the spool chamber of supercharging reset oil return inserted valve V16; The A mouth of supercharging inserted valve V15 is communicated with the A mouth of supercharging reset oil return inserted valve V16 and the two is communicated with the supercharging oil suction chamber 9 of pressurizing cylinder F2 after being communicated with.
Locked mode inserted valve V1 is by the control of locked mode electromagnetic direction valve V6; Wherein, the A hole of locked mode electromagnetic direction valve V6 is communicated with the spool chamber of locked mode inserted valve V1, and the A mouth of locked mode inserted valve V1 is communicated with locked mode check valve V9, and the oil-out of locked mode check valve V9 is communicated with the locked mode rodless cavity 5 of Mode-locking oil cylinder F1.
Pressurizing cylinder F2 inside is provided with charged piston 1, and charged piston 1 left end is connected with charged piston bar 2, and right-hand member is connected with test rod 3; Described device for detecting distance of travel C1 to be arranged on test rod 3 and to determine whether charged piston 1 resets by the stroke detecting test rod 3.
Its implementation process:
The diameter of Mode-locking oil cylinder F1 is smaller, and the diameter of pressurizing cylinder F2 is comparatively large, and only when locked mode high pressure section (this demands pressure ratio system pressure is high), charged piston 1 just moves.According to supercharging principle, locked mode rodless cavity 5 pressure of Mode-locking oil cylinder F1 increases, thus reaches the effect of supercharging locked mode.
This hydraulic mechanism has widely used inserted valve loop, is analyzed as follows each operating mode implementation process:
1, at a slow speed locked mode action time:
Locked mode electromagnetic direction valve V6 obtains electric; the spool chamber of locked mode inserted valve V1 is made to be communicated with fuel tank; under the effect of system pressure fluid; the spool chamber fluid of locked mode inserted valve V1 is made to get back to fuel tank; at this moment the spool of locked mode inserted valve V1 is opened, and system pressure fluid, through locked mode check valve V9, finally enters the locked mode rodless cavity 5 of Mode-locking oil cylinder F1; system pressure fluid promotes locking piston bar 4 and stretches out motion, carries out locked mode at a slow speed.
The while of with it, locked mode rod chamber 6 fluid of Mode-locking oil cylinder F1 flows back to fuel tank by locked mode oil return inserted valve V5.
2, during quick locked mode action:
Locked mode electromagnetic direction valve V6 and die sinking electromagnetic direction valve V8 all electric; the spool chamber of locked mode oil return inserted valve V5 is communicated with system oil-way and closes; the spool chamber fluid of locked mode inserted valve V1 is communicated with fuel tank with the spool chamber fluid of die sinking inserted valve V4; under the effect of system pressure fluid; the spool of locked mode inserted valve V1 and the spool of die sinking inserted valve V4 are opened, and the locked mode rod chamber 6 of Mode-locking oil cylinder F1 is communicated with locked mode rodless cavity 5.Result in formation of differential circuit, realize quick locked mode action.
3, during the action of supercharging locked mode:
Locked mode electromagnetic direction valve V6 and supercharging electromagnetic direction valve V14 obtains electric, the spool chamber fluid of locked mode inserted valve V1 is communicated with fuel tank with the spool chamber fluid of supercharging inserted valve V15, under the effect of system pressure fluid, the spool of locked mode inserted valve V1 and the spool of supercharging inserted valve V15 are opened, the spool chamber of supercharging reset oil return inserted valve V16 is communicated with system oil-way, the spool of supercharging reset oil return inserted valve V16 keeps closing, system pressure fluid enters the supercharging oil suction chamber 9 of pressurizing cylinder F2 through supercharging inserted valve V15, promotes charged piston 1 and realizes supercharging locked mode.
4, during die sinking:
Supercharging reset electromagnetic direction valve V7 and die sinking electromagnetic direction valve V8 obtains electric, in like manner, system pressure fluid enters the supercharging oil back chamber 8 of pressurizing cylinder F2 through supercharging reset inserted valve V3, promote charged piston 1 to reset, system pressure fluid enters the locking piston bar 4 of Mode-locking oil cylinder F1 through die sinking inserted valve V4, promote locking piston bar 4 to reset, realize die sinking; Simultaneously; die sinking oil return electromagnetic direction valve V10 obtains electric; system pressure enters the control mouth of die sinking oil return shuttle valve V11; the spool chamber of die sinking oil return inserted valve V12 is made to disconnect with the locked mode rodless cavity 5 of Mode-locking oil cylinder F1 and be communicated with fuel tank; under the effect of locked mode rodless cavity 5 fluid; the spool of die sinking oil return inserted valve V12 is opened, and the fluid of locked mode rodless cavity 5 flows back to fuel tank through die sinking oil return inserted valve V12.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.Those skilled in the art should understand the present invention and not be restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (8)
1. the booster-type locked mode hydraulic mechanism of a heavy die casting machine, it is characterized in that: comprise Mode-locking oil cylinder (F1), pressurizing cylinder (F2), locked mode inserted valve (V1), supercharging oil return inserted valve (V2), supercharging reset inserted valve (V3), die sinking inserted valve (V4), locked mode oil return inserted valve (V5), locked mode electromagnetic direction valve (V6), supercharging reset electromagnetic direction valve (V7), die sinking electromagnetic direction valve (V8), locked mode check valve (V9), die sinking oil return electromagnetic direction valve (V10), die sinking oil return shuttle valve (V11), die sinking oil return inserted valve (V12), supercharging electromagnetic direction valve (V14), supercharging inserted valve (V15), supercharging reset oil return inserted valve (V16), device for detecting distance of travel (C1) and pipeline, described Mode-locking oil cylinder (F1) and pressurizing cylinder (F2) are for distribute up and down, and wherein Mode-locking oil cylinder (F1) is placed in top, and pressurizing cylinder (F2) is placed in below and the two head and the tail is communicated with.
2. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 1, it is characterized in that: sized by described pressurizing cylinder (F2) point two sections, and inside is provided with charged piston (1), charged piston (1) is slidably arranged in the large section of pressurizing cylinder (F2), and one end is connected with charged piston bar (2), the other end is connected with test rod (3), charged piston bar (2) is slidably arranged in the segment of pressurizing cylinder (F2), test rod (3) stretches out pressurizing cylinder (F2) outward, pressurizing cylinder (F2) inside is also provided with builds pressure chamber (7), supercharging oil back chamber (8) and supercharging oil suction chamber (9), described Mode-locking oil cylinder (F1) inside is provided with locking piston bar (4), locked mode rodless cavity (5) and locked mode rod chamber (6), and the segment of pressurizing cylinder (F2) is communicated with locked mode rodless cavity (5).
3. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 2, is characterized in that: the A mouth of described die sinking oil return inserted valve (V12) is communicated with locked mode rodless cavity (5), and B mouth is communicated with fuel tank; The B hole of die sinking oil return electromagnetic direction valve (V10) is communicated with the control mouth of die sinking oil return shuttle valve (V11); Die sinking oil return shuttle valve (V11) connects the pressure port of spool and locked mode rodless cavity (5) is connected state in its natural state; The spool chamber of described die sinking oil return inserted valve (V12) disconnects when die sinking electromagnetic direction valve (V10) obtains electric with locked mode rodless cavity (5) and is communicated with fuel tank, and die sinking oil return inserted valve (V12) realizes when its A mouth is subject to certain pressure automatically opening.
4. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 2, is characterized in that: described die sinking inserted valve (V4) is communicated with locked mode oil return inserted valve (V5) and the two control by die sinking electromagnetic direction valve (V8); Wherein, the A hole of die sinking electromagnetic direction valve (V8) is communicated with the core chamber of die sinking inserted valve (V4), and B hole is communicated with the core chamber of locked mode oil return inserted valve (V5); The A mouth of die sinking inserted valve (V4) is communicated with the A mouth of locked mode oil return inserted valve (V5) and the two is communicated with the locked mode rod chamber (6) of Mode-locking oil cylinder (F1) after being communicated with.
5. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 2, is characterized in that: described supercharging oil return inserted valve (V2) is communicated with supercharging reset inserted valve (V3) and the two control by supercharging reset electromagnetic direction valve (V7); Wherein, the A hole of supercharging reset electromagnetic direction valve (V7) is communicated with the spool chamber of supercharging reset inserted valve (V3), and B hole is communicated with the spool chamber of supercharging oil return inserted valve (V2); The A mouth of supercharging reset inserted valve (V3) is communicated with the A mouth of supercharging oil return inserted valve (V2) and the two is communicated with the supercharging oil back chamber (8) of pressurizing cylinder (F2) after being communicated with.
6. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 2, is characterized in that: described supercharging inserted valve (V15) is communicated with supercharging reset oil return inserted valve (V16) and the two control by supercharging electromagnetic direction valve (V14); Wherein, the A hole of supercharging electromagnetic direction valve (V14) is communicated with the spool chamber of supercharging inserted valve (V15), and B hole is communicated with the spool chamber of supercharging reset oil return inserted valve (V16); The A mouth of supercharging inserted valve (V15) is communicated with the A mouth of supercharging reset oil return inserted valve (V16) and the two is communicated with the supercharging oil suction chamber (9) of pressurizing cylinder (F2) after being communicated with.
7. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to claim 2, is characterized in that: described locked mode inserted valve (V1) is by the control of locked mode electromagnetic direction valve (V6); Wherein, the A hole of locked mode electromagnetic direction valve (V6) is communicated with the spool chamber of locked mode inserted valve (V1), the A mouth of locked mode inserted valve (V1) is communicated with locked mode check valve (V9), and the oil-out of locked mode check valve (V9) is communicated with the locked mode rodless cavity (5) of Mode-locking oil cylinder (F1).
8. the booster-type locked mode hydraulic mechanism of heavy die casting machine according to any one of claim 1-7, it is characterized in that: described pressurizing cylinder (F2) inside is provided with charged piston (1), charged piston (1) left end is connected with charged piston bar (2), and right-hand member is connected with test rod (3); Described device for detecting distance of travel (C1) is arranged on test rod (3) and goes up and determine whether charged piston (1) resets by the stroke detecting test rod (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510467732.6A CN104999048B (en) | 2015-07-31 | 2015-07-31 | The booster-type locked mode hydraulic mechanism of heavy die casting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510467732.6A CN104999048B (en) | 2015-07-31 | 2015-07-31 | The booster-type locked mode hydraulic mechanism of heavy die casting machine |
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| CN104999048A true CN104999048A (en) | 2015-10-28 |
| CN104999048B CN104999048B (en) | 2017-07-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017427A (en) * | 2021-11-19 | 2022-02-08 | 中天钢铁集团有限公司 | Hydraulic system of bar hydraulic shear |
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| CN204382610U (en) * | 2014-12-30 | 2015-06-10 | 北京理工大学 | Supplementary positive displacements etc. are accommodating changes clamping apparatus |
| CN204997037U (en) * | 2015-07-31 | 2016-01-27 | 广东伊之密精密机械股份有限公司 | Booster -type mode locking hydraulic pressure mechanism of heavy die casting machine |
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- 2015-07-31 CN CN201510467732.6A patent/CN104999048B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1058113A (en) * | 1996-08-23 | 1998-03-03 | U Mold:Kk | Method for adjusting flow rate in hydraulic apparatus and device therefor |
| CN202263914U (en) * | 2011-09-10 | 2012-06-06 | 李胜林 | Die-casting machine die-locking oil path system |
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| CN204075146U (en) * | 2014-09-11 | 2015-01-07 | 东莞市锐风机械有限公司 | Die casting machine lock die sinking pressure charging system |
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| CN114017427A (en) * | 2021-11-19 | 2022-02-08 | 中天钢铁集团有限公司 | Hydraulic system of bar hydraulic shear |
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| CN104999048B (en) | 2017-07-18 |
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Address after: 528300 Guangdong province Foshan city Shunde high tech Zone (Ronggui) No. 22 Keyuan Road three Patentee after: Yizhimi Co.,Ltd. Address before: 528300 Guangdong province Foshan city Shunde high tech Zone (Ronggui) No. 22 Keyuan Road three Patentee before: GUANGDONG YIZUMI PRECISION MACHINERY Co.,Ltd. |