CN112576564B - Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press - Google Patents
Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press Download PDFInfo
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- CN112576564B CN112576564B CN202011346778.XA CN202011346778A CN112576564B CN 112576564 B CN112576564 B CN 112576564B CN 202011346778 A CN202011346778 A CN 202011346778A CN 112576564 B CN112576564 B CN 112576564B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Presses (AREA)
Abstract
The invention discloses a pressure balance protection device of horizontal side squeezing cylinders at two sides of a large-scale servo press, which belongs to the technical field of servo presses and is characterized by comprising an external oil cylinder valve bank connected with rodless cavities of the horizontal side squeezing cylinders at two sides; wherein: the external oil cylinder valve group comprises an electro-hydraulic proportional throttle valve, a sequence valve and a one-way valve; the electro-hydraulic proportional throttle valve is connected with a rodless cavity of the left horizontal extrusion oil cylinder through a left oil way provided with a left direction plug-in, a left electromagnetic directional valve and a left pressure sensor; the electro-hydraulic proportional throttle valve is connected with a rodless cavity of the right horizontal extrusion oil cylinder through a right oil way provided with a right direction plug-in, a right electromagnetic directional valve and a right pressure sensor; the sequence valve and the four check valves form a hydraulic bridge type loop, and two ends of the hydraulic bridge type loop are respectively connected with a rodless cavity of the left horizontal extrusion oil cylinder and a rodless cavity of the right horizontal extrusion oil cylinder.
Description
Technical Field
The invention belongs to the technical field of servo presses, and particularly relates to a pressure balance protection device for horizontal side extrusion cylinders on two sides of a large-scale servo press.
Background
The skin and end frame parts of the lightweight components of various active aerospace weaponry equipment are generally in space thin-wall reinforcing rib structures, and the curved surface structures cannot be manufactured by adopting a sheet bending forming method due to the existence of high ribs. The optimal method for manufacturing the typical metal cabin body framework and the end frame is hot extrusion multidirectional forming, the method can form the ribs in place at one time while obtaining good profile size precision, belongs to a near-net forming scheme, and avoids curved surface deformation caused by stress generated by subsequent processing. The horizontal side extrusion precision of the traditional double-side horizontal side extrusion cylinder non-pressure balance protection device of the large-scale servo press can not meet the precision requirement of a workpiece, and the main frame has large bearing force and is easy to fatigue damage due to different side extrusion forces, so that the design and development of the pressure balance protection device of the double-side horizontal side extrusion cylinder of the large-scale servo press are particularly important.
Disclosure of Invention
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
a pressure balance protection device for horizontal side squeezing cylinders at two sides of a large-scale servo press comprises an oil cylinder external valve group connected with rodless cavities of the horizontal side squeezing cylinders at two sides; wherein:
the external valve group of the oil cylinder comprises an electro-hydraulic proportional throttle valve (5), a sequence valve (6) and a check valve (7); the electro-hydraulic proportional throttle valve (5) is connected with a rodless cavity of the left horizontal extrusion oil cylinder (1-1) through a left oil way provided with a left direction plug-in (3-1), a left electromagnetic directional valve (4-1) and a left pressure sensor (2-1); the electro-hydraulic proportional throttle valve (5) is connected with a rodless cavity of the right horizontal extrusion oil cylinder (1-2) through a right oil way provided with a right direction plug-in (3-2), a right electromagnetic directional valve (4-2) and a right pressure sensor (2-2); the sequence valve (6) and the four one-way valves (7) form a hydraulic bridge type loop, and two ends of the hydraulic bridge type loop are respectively connected with a rodless cavity of the left horizontal extrusion oil cylinder (1-1) and a rodless cavity of the right horizontal extrusion oil cylinder (1-2).
The invention has the advantages and positive effects that:
by adopting the technical scheme, the rodless cavities of the two side horizontal side extrusion cylinders are connected through the external valve group of the oil cylinder, and when the two side horizontal cylinders perform side extrusion on a workpiece, pressure oil of the two side horizontal cylinders acts on two ends of the sequence valve through the check valves on the external valve group. Through setting the sequence valve on the external valve group, the extrusion pressure difference of the horizontal cylinders on the two sides is set, when the pressure difference is greater than the set pressure, the horizontal cylinders on the two sides are communicated, and the pressure is balanced instantly. When the horizontal cylinders on the two sides release pressure, the electromagnetic directional valves are electrified to open the directional valve plug-in units controlled by the electromagnetic directional valves, the pressure oil of the horizontal cylinders on the two sides simultaneously acts on the electro-hydraulic proportional throttle valve, and the electro-hydraulic proportional throttle valve is controlled to release pressure while the horizontal cylinders on the two sides release pressure, and the pressure release speed is controllable. The external valve bank of the oil cylinder controls the pressure difference of the horizontal side squeezing cylinders at two sides in the pressurizing and pressure releasing stages, so that the pressure balance of the two cylinders is realized, and the host frame is protected.
Drawings
FIG. 1 is a hydraulic schematic diagram of an external valve set of a cylinder according to a preferred embodiment of the present invention;
FIG. 2 is an external view of an external valve set of the oil cylinder according to the preferred embodiment of the present invention;
wherein: 1-1, horizontally extruding an oil cylinder on the left side; 1-2, horizontally extruding the oil cylinder on the right side; 2-1, a left side pressure sensor; 2-2, right side pressure sensor; 3-1, a left direction plug-in; 3-2, right direction plug-in; 4-1, a left electromagnetic directional valve; 4-2, a right electromagnetic directional valve; 5. an electro-hydraulic proportional throttle valve; 6. a sequence valve; 7. a one-way valve.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1 to 2, the pressure balance protection device for the bilateral horizontal side squeezing cylinders of the large-scale servo press is an external cylinder valve bank composed of various hydraulic valves, synchronous pressure boosting, synchronous pressure relief and constant set pressure difference pressurization work of the bilateral horizontal side squeezing cylinders are realized by regulating the hydraulic control valves on the valve bank, pressure balance of the bilateral horizontal side squeezing cylinders is guaranteed, requirements of bilateral squeezing workpieces are met, and a host frame of the device is protected.
The specific structural relationship of the preferred embodiment is as follows:
the external valve group of the oil cylinder comprises an electro-hydraulic proportional throttle valve 5, a sequence valve 6 and a one-way valve 7; the electro-hydraulic proportional throttle valve 5 is connected with a rodless cavity of the left horizontal extrusion oil cylinder 1-1 through a left oil way which is provided with a left direction plug-in 3-1, a left electromagnetic directional valve 4-1 and a left pressure sensor 2-1; the electro-hydraulic proportional throttle valve 5 is connected with a rodless cavity of the right horizontal extrusion oil cylinder 1-2 through a right oil way which is provided with a right direction plug-in 3-2, a right electromagnetic directional valve 4-2 and a right pressure sensor 2-2; the sequence valve 6 and the four one-way valves 7 form a hydraulic bridge type loop, and two ends of the bridge type loop are respectively connected with a rodless cavity of the left horizontal extrusion oil cylinder 1-1 and a rodless cavity of the right horizontal extrusion oil cylinder 1-2.
The working principle of the preferred embodiment is as follows:
the rodless cavities of the two side horizontal side extrusion cylinders are connected through an external valve bank of the oil cylinder, and when the two side horizontal cylinders extrude a workpiece laterally, pressure oil of the two side horizontal cylinders acts on two ends of the sequence valve through the check valves on the external valve bank. Through setting the sequence valve on the external valve group, the extrusion pressure difference of the horizontal cylinders on the two sides is set, and when the extrusion pressure difference is greater than the set pressure, the horizontal cylinders on the two sides are communicated, and the pressure is balanced instantly. When the horizontal cylinders on the two sides release pressure, the electromagnetic directional valves are electrified to open the directional valve plug-in units controlled by the electromagnetic directional valves, the pressure oil of the horizontal cylinders on the two sides simultaneously acts on the electro-hydraulic proportional throttle valve, and the electro-hydraulic proportional throttle valve is controlled to release pressure while the horizontal cylinders on the two sides release pressure, and the pressure release speed is controllable. The external valve bank of the oil cylinder controls the pressure difference of the squeezing cylinders at the horizontal sides at the two sides in the pressurization and decompression stages, so that the pressure balance of the two cylinders is realized, and a host frame is protected.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (1)
1. A pressure balance protection device for horizontal side extrusion cylinders at two sides of a large-scale servo press is characterized by comprising an oil cylinder external valve group connected with rodless cavities of the horizontal side extrusion cylinders at two sides; the pressure difference of the horizontal side squeezing cylinders at two sides in the pressurizing and pressure releasing stages is controlled through the external valve group of the oil cylinder, so that the pressure balance of the two cylinders is realized, and a host frame is protected; wherein:
the external valve group of the oil cylinder comprises an electro-hydraulic proportional throttle valve (5), a sequence valve (6) and a check valve (7); the electro-hydraulic proportional throttle valve (5) is connected with a rodless cavity of the left horizontal extrusion oil cylinder (1-1) through a left oil way provided with a left direction plug-in (3-1), a left electromagnetic directional valve (4-1) and a left pressure sensor (2-1); the electro-hydraulic proportional throttle valve (5) is connected with a rodless cavity of the right horizontal extrusion oil cylinder (1-2) through a right oil way provided with a right direction plug-in (3-2), a right electromagnetic directional valve (4-2) and a right pressure sensor (2-2); the sequence valve (6) and the four one-way valves (7) form a hydraulic bridge type loop, and two ends of the hydraulic bridge type loop are respectively connected with a rodless cavity of the left horizontal extrusion oil cylinder (1-1) and a rodless cavity of the right horizontal extrusion oil cylinder (1-2);
when the sequence valve works, when the horizontal cylinders on the two sides extrude a workpiece laterally, pressure oil of the horizontal cylinders on the two sides acts on the two ends of the sequence valve through the check valves (7) on the external valve group; the extrusion pressure difference of the horizontal cylinders at two sides is set by setting a sequence valve (6) on the external valve group, and when the extrusion pressure difference is greater than the set pressure, the horizontal cylinders at two sides are communicated, and the pressure is balanced instantly; when the horizontal cylinders on the two sides release pressure, the electromagnetic directional valves are electrified, so that the plug-in units in the control direction of the electromagnetic directional valves are opened, the pressure oil of the horizontal cylinders on the two sides simultaneously acts on the electro-hydraulic proportional throttle valve, and the effects of simultaneous pressure release of the horizontal cylinders on the two sides and controllable pressure release speed are achieved by controlling the electro-hydraulic proportional throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346778.XA CN112576564B (en) | 2020-11-26 | 2020-11-26 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011346778.XA CN112576564B (en) | 2020-11-26 | 2020-11-26 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
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| CN112576564A CN112576564A (en) | 2021-03-30 |
| CN112576564B true CN112576564B (en) | 2023-01-24 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201653131U (en) * | 2009-09-28 | 2010-11-24 | 中冶东方工程技术有限公司 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
| CN205154795U (en) * | 2015-10-16 | 2016-04-13 | 浙江大学 | Controllable TBM of high -efficient high accuracy flow supports hydraulic system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478031B (en) * | 2010-11-22 | 2015-09-09 | 北汽福田汽车股份有限公司 | Switching valve and pumping system |
| CN103419630A (en) * | 2012-05-16 | 2013-12-04 | 朱洪纲 | Vehicular self-drive hydraulic control system with function of inertial energy accumulation |
| CN104632746B (en) * | 2015-03-04 | 2017-11-24 | 徐州重型机械有限公司 | switching valve, switching hydraulic system and crane |
| CN205136176U (en) * | 2015-11-30 | 2016-04-06 | 湖南省产商品质量监督检验研究院 | Hydraulic circuit |
| CN105545848B (en) * | 2016-01-05 | 2023-06-20 | 广东思豪内高压科技有限公司 | Precise synchronous hydraulic control system for cylinders at two sides of high-pressure forming hydraulic press in pipe |
| CN207212795U (en) * | 2017-05-27 | 2018-04-10 | 东莞金洲纸业有限公司 | One kind applying glue machine hydraulic system |
| CN111022394A (en) * | 2019-11-19 | 2020-04-17 | 一汽解放汽车有限公司 | Hydraulic integrated system |
| CN111140558A (en) * | 2020-01-29 | 2020-05-12 | 中冶重工（唐山）有限公司 | Hydraulic system of heat treatment manipulator and control method thereof |
| CN211599129U (en) * | 2020-02-05 | 2020-09-29 | 北京和华瑞博医疗科技有限公司 | Pressure self-balancing hydraulic system |
| CN111577678B (en) * | 2020-05-26 | 2022-03-29 | 中国铁建重工集团股份有限公司 | Hydraulic system of heading machine and heading machine |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201653131U (en) * | 2009-09-28 | 2010-11-24 | 中冶东方工程技术有限公司 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
| CN205154795U (en) * | 2015-10-16 | 2016-04-13 | 浙江大学 | Controllable TBM of high -efficient high accuracy flow supports hydraulic system |
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