CN114193810B - Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function - Google Patents

Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function Download PDF

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Publication number
CN114193810B
CN114193810B CN202111533004.2A CN202111533004A CN114193810B CN 114193810 B CN114193810 B CN 114193810B CN 202111533004 A CN202111533004 A CN 202111533004A CN 114193810 B CN114193810 B CN 114193810B
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China
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cross beam
leveling
cylinder
initiative
hydraulic press
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CN202111533004.2A
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CN114193810A (en
Inventor
王磊
李卫华
崖华青
李贵闪
张兰军
牛强
张亭
王亮
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Hefei Metalforming Intelligent Manufacturing Co ltd
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Hefei Metalforming Intelligent Manufacturing Co ltd
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Priority to CN202111533004.2A priority Critical patent/CN114193810B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • B30B1/34Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure involving a plurality of plungers acting on the platen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04Frames; Guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16Control arrangements for fluid-driven presses

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Presses (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention discloses a large split type thick plate end socket forming hydraulic machine with a double-initiative four-corner leveling function, and belongs to the technical field of hydraulic machines. A large split type thick plate seal head forming hydraulic press with a double-initiative four-corner leveling function is formed by combining an upper cross beam, a lower cross beam and a stand column through pull rods and nuts, wherein the upper cross beam, the lower cross beam and the slide blocks are all of an integral alloy cast steel structure, the frame is of a pull rod four-stand column combined structure, the nuts are of a split type combined structure, the upper cross beam, the lower cross beam and the stand column are positioned by flat keys, a main plunger cylinder is fixed in the upper cross beam through a cylinder body flange shoulder and the nuts, the lower end of the plunger rod is connected with the slide blocks through flanges, screws, gaskets and the like, a hydraulic leveling system and a workbench moving positioning system based on a workbench are built around the slide blocks, and the high-precision double-initiative four-corner leveling function of the press slide blocks and lifting and clamping work of the workbench are realized.

Description

Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function
Technical Field
The invention relates to the technical field of hydraulic presses, in particular to a large split type thick plate end socket forming hydraulic press with a double-initiative four-corner leveling function.
Background
With the development of national navigation and diving industry and petrochemical industry, the requirements on the size and the precision of the end socket products are higher and higher, the prior common end socket hydraulic press can not meet the requirements of the process development of the prior end socket products, and the development of a large-scale high-precision thick plate end socket forming hydraulic press is urgently needed.
Therefore, a large split type thick plate end socket forming hydraulic machine with a double-initiative four-corner leveling function is designed.
Disclosure of Invention
The invention aims to solve the problems related to the prior art, and provides a large split type thick plate end socket forming hydraulic press with a double-initiative four-corner leveling function.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function comprises a rigid frame and a hydraulic stroke control system, wherein the rigid frame comprises an upper beam, a lower beam, a column, a pull rod and nuts, a plurality of column front and rear central lines are symmetrically and vertically arranged between the upper beam and the lower beam in a left-right symmetry manner and are fixedly connected through the pull rod and the nuts by flat keys,
the hydraulic stroke control system comprises a main plunger cylinder, a sliding block and a return piston cylinder, wherein the four main plunger cylinders are uniformly distributed in the upper cross beam and are fixedly connected with the upper cross beam through a cylinder body flange shoulder and a nut, the sliding block is arranged between the upper cross beam and the lower cross beam and is surrounded by a plurality of upright posts, and plunger rods of the main plunger cylinders are vertically downwards fixedly connected with the sliding block through flanges, screws and gaskets;
the hydraulic leveling system and the workbench moving and positioning system are also included;
the hydraulic leveling system comprises an upper leveling cylinder, a lower leveling cylinder, a high-frequency response proportional servo valve, a pressure sensor and a high-precision displacement sensor, wherein the upper leveling cylinder is arranged at four corners of the bottom of an upper beam, the lower leveling cylinder is arranged at four corners of the top of a lower beam, ears are welded at the left end and the right end of a sliding block, fixing grooves which are protruded left and right symmetrically and are formed in the front and rear sides of the sliding block along the front and rear center line, leveling shoulder poles embedded in the fixing grooves are arranged at the front and rear sides of the sliding block, plunger rods of the upper leveling cylinder and the lower leveling cylinder are connected with the upper end face and the lower end face of the leveling shoulder poles at the front and rear sides of the sliding block, the high-precision displacement sensor is arranged at the outer side of a stand column, the high-frequency response proportional servo valve is arranged on an oil tank of the upper leveling cylinder and the lower leveling cylinder, the pressure sensor is arranged on a pipeline of the upper leveling cylinder and a plunger rod, and a locking device for fixing the sliding block is arranged at a limiting position on the inner side of the stand column.
Preferably, the workbench moving and positioning system comprises a moving workbench, a driving oil cylinder device and a moving workbench guide rail, wherein the moving workbench is arranged on the moving workbench guide rail and is controlled by the driving oil cylinder device to move back and forth, and a positioning key, a dead stop block, a photoelectric sensing switch and a limit switch for realizing accurate moving and positioning of the moving workbench are arranged on the moving workbench guide rail.
Preferably, the upper cross beam, the lower cross beam and the sliding block all adopt an integral alloy steel casting structure.
Preferably, the bottom surface of the sliding block and the top surface of the movable workbench are provided with T-shaped grooves for installing the die.
Preferably, a safety light curtain is installed on the upright post.
Preferably, the nut adopts a split type combined structure.
Preferably, the hydraulic leveling system further comprises a load-sensitive proportional electronic pump and a servo valve, wherein the servo valve is arranged on a main plunger cylinder, and the main plunger cylinder is connected with the oil tank through the load-sensitive proportional electronic pump.
Preferably, the oil tank is provided with an independent sound insulation room.
Preferably, the hydraulic oil tank and the connecting oil pipe are made of stainless steel materials, and the high-pressure pipeline is connected by an SAE flange and a welding joint.
Compared with the prior art, the invention provides a large split type thick plate end socket forming hydraulic press with a double-initiative four-corner leveling function, which has the following beneficial effects:
the invention relates to a large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function, which is of a split frame structure, and is formed by combining an upper beam, a lower beam and upright posts through pull rods and nuts, wherein the upper beam, the lower beam and a sliding block are all of an integral alloy steel casting structure, the frame is of an eight-pull rod four-upright post combined structure, the nuts are of a split combined structure, the assembly workload of the pull rods and the nuts is greatly reduced,
the upper main plunger cylinder is fixed in the upper cross beam through the flange shoulder of the cylinder body and the nuts, the lower end of the plunger rod is connected with the sliding block through the flange, the screws, the gaskets and the like, a hydraulic leveling system taking the leveling shoulder pole as a core is built around the sliding block, and the high-precision dual-active four-corner leveling function of the sliding block of the press is realized through matching four high-precision displacement sensors with the high-frequency response proportional servo valve, the pressure sensor and the like, so that the setting of the leveling shoulder pole is satisfied with the use of the super-large-tonnage hydraulic press and the sliding block.
The workbench moving and positioning system is characterized in that the movable workbench is driven by a driving oil cylinder device to move back and forth on the lower beam and the movable workbench guide rail, and is provided with a positioning key, a dead stop block, a photoelectric sensing switch, a limit switch and the like, so that accurate position movement and working positioning of the movable workbench are realized, and a lifting clamping oil cylinder of the movable workbench is fixedly arranged in the lower beam, so that lifting and clamping work of the workbench is realized, and alignment and pressurization are more stable.
Drawings
FIG. 1 is a schematic diagram of the overall front view of the present invention;
FIG. 2 is a schematic diagram of the overall left-view structure of the present invention;
FIG. 3 is a schematic top view of the overall structure of the present invention;
FIG. 4 is a schematic view of the overall three-dimensional structure of the present invention;
fig. 5 is a schematic top view of a leveling cylinder pipeline according to the present invention.
Description of the figure: 1. a return piston cylinder; 2. a pull rod; 3. a nut; 4. a main plunger cylinder; 5. an upper cross beam; 6. an upper leveling cylinder; 7. leveling the carrying pole; 8. a slide block; 9. a column; 10. a lower leveling cylinder; 11. a movable table; 12. a driving cylinder device; 13. a mobile station guide rail; 14. a lower cross beam; 15. locking device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-5, the large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function comprises a rigid frame, a hydraulic stroke control system, a hydraulic leveling system and a workbench moving and positioning system, wherein the rigid frame comprises an upper cross beam 5, a lower cross beam 14, upright posts 9, a pull rod 2 and nuts 3, the front and rear central lines of the upright posts 9 are symmetrically arranged between the upper cross beam 5 and the lower cross beam 14 vertically in a bilateral symmetry manner and are fixedly connected through the pull rod 2 and the nuts 3 by flat keys,
the hydraulic stroke control system comprises main plunger cylinders 4, sliding blocks 8 and return piston cylinders 1, wherein the four main plunger cylinders 4 are uniformly distributed in an upper cross beam 5 and fixedly connected with the upper cross beam 5 through cylinder body flange shoulders and nuts 3, the sliding blocks 8 are arranged between the upper cross beam 5 and a lower cross beam 14 and are surrounded by a plurality of upright posts 9, and plunger rods of the main plunger cylinders 4 are vertically downwards connected and fixed with the sliding blocks 8 through flanges, screws and gaskets.
The hydraulic leveling system comprises an upper leveling cylinder 6, a lower leveling cylinder 10, a high-frequency response proportional servo valve, a pressure sensor and a high-precision displacement sensor, wherein the upper leveling cylinder 6 is arranged at four corners of the bottom of an upper beam 5, the lower leveling cylinder 10 is arranged at four corners of the top of a lower beam 14, ears are welded at the left end and the right end of a sliding block 8, the front side and the rear side of the sliding block 8 are symmetrically protruded left and right along the front center line and provided with U-shaped fixing grooves, leveling shoulder poles 7 embedded in the fixing grooves are arranged at the front side and the rear side of the sliding block 8, plunger rods of the upper leveling cylinder 6 and the lower leveling cylinder 10 are connected with the upper end face and the lower end face of the leveling shoulder poles 7 at the front side and the rear side of the sliding block 8, the high-precision displacement sensor is arranged at the outer side of a stand column 9, the high-frequency response proportional servo valve is arranged on the upper leveling cylinder 6 and the lower leveling cylinder 10, the pressure sensor is arranged at the joint of the plunger rods of the upper leveling cylinder 6 and the lower leveling shoulder poles 7, and the locking devices 15 for fixing the sliding block 8 are arranged at the limiting positions on the inner sides of the stand column 9.
The upper beam 5, the lower beam 14 and the sliding block 8 all adopt a whole alloy steel casting structure.
The nut 3 adopts a split type combined structure.
The invention utilizes the upper beam 5, the lower beam 14 and the upright post 9 to be combined into a closed hydraulic press rigid frame through the pull rod 2 and the nut 3, wherein the upper beam 5, the lower beam 14 and the sliding block 8 are all of an integral alloy cast steel structure, the frame is of an eight-pull rod 2 four-upright post 9 combined structure, the nut 3 is of a split combined structure, the assembly workload of the pull rod 2 and the nut 3 is greatly reduced, the upper beam 5, the lower beam 14 and the upright post 9 are positioned by flat keys, the main plunger cylinder 4 is fixed in the upper beam 5 through a cylinder body flange shoulder and the nut 3, and the lower end of the plunger rod is connected with the sliding block 8 through a flange, a screw, a gasket and the like.
According to the hydraulic press, four sets of main plunger cylinders 4 are arranged on the hydraulic press, the four plunger cylinders are pressurized simultaneously to achieve the tonnage of the hydraulic press, the four plunger cylinders can be randomly selected and combined to be used, the high-precision small tonnage pressure is achieved, the correction requirements of different areas of a workpiece are met, two inlet Lishile liquid filling valves are arranged on the upper end face of the main cylinder body, the requirement of large flow liquid filling during high-speed quick-down is met, the cylinder body of a return piston cylinder 1 is arranged at the left end and the right end of the front central line of an upper cross beam 5, the lower end of a piston rod of the return piston cylinder penetrates through the left ear hole and the right ear hole of a sliding block 8 and is fixedly connected with the sliding block 8 through large nuts, the return piston cylinder 1 is a single-acting piston cylinder, oil is fed in and discharged through a rod cavity, and the main tonnage of the hydraulic press is not involved in the pressurizing work.
In the hydraulic leveling system, an upper leveling cylinder 6 and a lower leveling cylinder 10 are respectively arranged at four corners of an upper beam 5 and a lower beam 14, leveling cylinder plunger rods are connected with the upper end face and the lower end face of a front leveling shoulder pole 7 and a rear leveling shoulder pole 7 of a sliding block 8, the upper leveling cylinder 6 is communicated with the lower leveling cylinder 10 opposite to the upper leveling cylinder 6, and the high-precision double-active four-corner leveling function of the sliding block 8 of the press is realized by matching four high-precision displacement sensors with a high-frequency response proportional servo valve, a pressure sensor and the like of the hydraulic leveling system.
Example 2:
referring to fig. 1-4, the difference is based on embodiment 1; the workbench moving and positioning system comprises a moving workbench 11, a driving oil cylinder device 12 and a moving workbench guide rail 13, wherein the moving workbench 11 is arranged on the moving workbench guide rail 13 and is controlled by the driving oil cylinder device 12 to move back and forth, and a positioning key, a dead stop block, a photoelectric sensing switch and a limit switch for realizing accurate moving and positioning of the moving workbench 11 are arranged on the moving workbench guide rail 13.
The bottom surface of the sliding block 8 and the top surface of the movable workbench 11 are provided with T-shaped grooves for installing the die.
The upright post 9 is provided with a safety light curtain.
The hydraulic leveling system also comprises a load-sensitive proportional electronic pump and a servo valve, wherein the servo valve is arranged on the main plunger cylinder 4, and the main plunger cylinder 4 is connected with a hydraulic oil tank through the load-sensitive proportional electronic pump.
The main oil tank is provided with an independent sound insulation room.
The hydraulic oil tank and the connecting oil pipe are made of stainless steel materials, and the high-pressure pipeline is connected by adopting an SAE flange and a welding joint.
The workbench moving and positioning system is characterized in that a moving workbench 11 is driven by a driving oil cylinder device 12 to move back and forth on a lower beam 14 and a moving platform guide rail 13, and is provided with a positioning key, a dead stop block, a photoelectric sensing switch, a limit switch and the like, so that accurate position movement and working positioning of the workbench are realized, and a lifting clamping oil cylinder of the moving workbench 11 is fixedly arranged in the lower beam 14, so that lifting and clamping actions of the workbench are realized.
According to the invention, the hydraulic oil tank and the oil pipe are made of stainless steel, so that the cleanliness of the hydraulic pipeline is ensured; the SAE flange, the welding joint and the like are adopted for high-pressure pipeline connection, the reliability of a pipeline system is guaranteed, the safety light curtain is installed at the position of the front and rear stand columns 9 of the machine body, the safety of operators is guaranteed, the safety ladder, the safety platform, the fence and the like are arranged, the safety ladder is provided with a limit switch and is interlocked with the work of a host machine, the safety of maintenance personnel is guaranteed, the oil tank power station is placed in an independent sound insulation room, and the noise of an operation area of the host machine is effectively reduced.
According to the invention, the locking device 15 is arranged on the sliding block 8 at the inner side of the upright post 9 to limit the sliding block 8 for locking when the press is stopped or the die is repaired, so that the personal safety of operators is ensured.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.

Claims (6)

1. The large split thick plate end socket forming hydraulic press with the double-initiative four-corner leveling function comprises a rigid frame and a hydraulic stroke control system, wherein the rigid frame comprises an upper cross beam (5), a lower cross beam (14), upright posts (9), pull rods (2) and nuts (3), a plurality of upright posts (9) are vertically arranged on the upper cross beam (5) in a bilateral symmetry manner along the front-rear center line, the lower cross beam (14) is positioned by flat keys and connected and fixed by the pull rods (2) and the nuts (3),
the hydraulic stroke control system comprises a main plunger cylinder (4), sliding blocks (8) and return piston cylinders (1), wherein the four main plunger cylinders (4) are uniformly distributed in an upper cross beam (5) and fixedly connected with the upper cross beam through cylinder body flange shoulders and nuts (3), the sliding blocks (8) are arranged between the upper cross beam (5) and a lower cross beam (14) and are surrounded by a plurality of upright posts (9), and plunger rods of the main plunger cylinders (4) are vertically downwards connected and fixed with the sliding blocks (8) through flanges, screws and gaskets;
the method is characterized in that: the hydraulic leveling system and the workbench moving and positioning system are also included;
the hydraulic leveling system comprises an upper leveling cylinder (6), a lower leveling cylinder (10), a high-frequency response proportional servo valve, a pressure sensor and a high-precision displacement sensor, wherein the upper leveling cylinder (6) is arranged at four corners at the bottom of an upper cross beam (5), the lower leveling cylinder (10) is arranged at four corners at the top of a lower cross beam (14), ears are welded at the left end and the right end of a sliding block (8), the front side and the rear side of the sliding block (8) are symmetrically protruded left and right along the front center line and are provided with U-shaped fixed grooves, the front side and the rear side of the sliding block (8) are provided with leveling shoulder poles (7) embedded in the fixed grooves, the upper leveling cylinder (6) is connected with the upper end face and the lower end face of the leveling shoulder pole (7) at the front side and the rear side of the sliding block (8), the high-precision displacement sensor is arranged at the outer side of a stand column (9), the high-frequency response proportional servo valve is arranged on the upper leveling cylinder (6) and the left end and the right end of the lower leveling cylinder (10), the pressure sensor is arranged on an oil tank of the upper leveling cylinder (6) and the lower leveling cylinder (10), and the sliding block (8) is provided with a locking device at the inner side (15) of the stand column (8);
the workbench moving and positioning system comprises a moving workbench (11), a driving oil cylinder device (12) and a moving platform guide rail (13), wherein the moving workbench (11) is arranged on the moving platform guide rail (13) and is controlled by the driving oil cylinder device (12) to move forwards and backwards, and a positioning key, a dead stop block, a photoelectric sensing switch and a limit switch for realizing accurate moving and positioning of the moving workbench (11) are arranged on the moving platform guide rail (13);
the bottom surface of the sliding block (8) and the top surface of the movable workbench (11) are respectively provided with a T-shaped groove for installing a die;
the hydraulic leveling system also comprises a load-sensitive proportional electronic pump and a servo valve, wherein the servo valve is arranged on the main plunger cylinder (4), and the main plunger cylinder (4) is connected with the oil tank through the load-sensitive proportional electronic pump;
four sets of main plunger cylinders (4) are arranged, the four main plunger cylinders (4) are pressurized simultaneously to realize the main tonnage of the hydraulic machine, the four main plunger cylinders (4) can be randomly selected and combined for use, the high-precision small tonnage pressure use is realized, and the correction requirements of different areas of a workpiece are met.
2. The large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function according to claim 1, wherein the hydraulic press is characterized in that: the upper cross beam (5), the lower cross beam (14) and the sliding block (8) all adopt integral alloy steel casting structures.
3. The large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function according to claim 1, wherein the hydraulic press is characterized in that: and the upright post (9) is provided with a safety light curtain.
4. The large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function according to claim 1, wherein the hydraulic press is characterized in that: the nut (3) adopts a split type combined structure.
5. The large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function according to claim 1, wherein the hydraulic press is characterized in that: the oil tank is provided with an independent sound insulation room.
6. The large split type thick plate end socket forming hydraulic press with double-initiative four-corner leveling function, according to claim 5, is characterized in that: the oil tank and the connecting oil pipe are made of stainless steel materials, and the high-pressure pipeline is connected by adopting an SAE flange and a welding joint.
CN202111533004.2A 2021-12-15 2021-12-15 Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function Active CN114193810B (en)

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Application Number Priority Date Filing Date Title
CN202111533004.2A CN114193810B (en) 2021-12-15 2021-12-15 Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function

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Application Number Priority Date Filing Date Title
CN202111533004.2A CN114193810B (en) 2021-12-15 2021-12-15 Large split thick plate end socket forming hydraulic press with double-initiative four-corner leveling function

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CN114193810B true CN114193810B (en) 2023-12-29

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115609991B (en) * 2022-12-05 2023-03-21 合肥合锻智能制造股份有限公司 Leveling test bed for simulating hydraulic machine under different unbalance loading working conditions
CN116714296A (en) * 2023-08-09 2023-09-08 合肥合锻智能制造股份有限公司 Double-beam hydraulic machine with double anti-unbalanced load and adjustable height

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JP5685671B1 (en) * 2014-07-10 2015-03-18 株式会社山岡製作所 Resin molding equipment
CN206186214U (en) * 2016-08-29 2017-05-24 南通锻压设备股份有限公司 Hydraulic press with a collection die sinking, compress tightly, device that three functions of leveling are integrative
CN110756712A (en) * 2019-11-08 2020-02-07 合肥合锻智能制造股份有限公司 Large-scale precision isothermal forging hydraulic press with four-corner active leveling function

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Publication number Priority date Publication date Assignee Title
CN2500468Y (en) * 2001-09-19 2002-07-17 天津市锻压机床总厂 Hydraulic machine for glass fibre reinforced plastic products with quadrangular levelling apparatus
CN1733386A (en) * 2004-08-09 2006-02-15 天津市天锻压力机有限公司 Large-scale semi-solid state die forging hydraulic press
CN101691069A (en) * 2009-10-11 2010-04-07 济南巨能液压机电工程有限公司 Dual-cylinder dual-frame plate-and-frame hydraulic press with large table surface
CN102363345A (en) * 2011-06-30 2012-02-29 天津市天锻压力机有限公司 Control system for leveling four corners of hydraulic press
CN104416105A (en) * 2013-09-06 2015-03-18 天津市天锻压力机有限公司 Heavy-duty isothermal forging press with four corner leveling function
JP5685671B1 (en) * 2014-07-10 2015-03-18 株式会社山岡製作所 Resin molding equipment
CN206186214U (en) * 2016-08-29 2017-05-24 南通锻压设备股份有限公司 Hydraulic press with a collection die sinking, compress tightly, device that three functions of leveling are integrative
CN110756712A (en) * 2019-11-08 2020-02-07 合肥合锻智能制造股份有限公司 Large-scale precision isothermal forging hydraulic press with four-corner active leveling function

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