CN114738355B - An intelligent hydraulic press with equal stiffness and bidirectional loading - Google Patents

An intelligent hydraulic press with equal stiffness and bidirectional loading Download PDF

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Publication number
CN114738355B
CN114738355B CN202210575079.5A CN202210575079A CN114738355B CN 114738355 B CN114738355 B CN 114738355B CN 202210575079 A CN202210575079 A CN 202210575079A CN 114738355 B CN114738355 B CN 114738355B
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China
Prior art keywords
pressure
clamping
jack
real
horizontal axis
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CN114738355A (en
Inventor
张鑫
李树明
刘巧玲
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Shandong Jianzhu University Engineering Appraisal And Reinforcement Research Institute Co ltd
Shandong Jianzhu University
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Shandong Jianzhu University Engineering Appraisal And Reinforcement Research Institute Co ltd
Shandong Jianzhu University
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Classifications

    • 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
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/068—Drive connections, e.g. pivotal
    • 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
    • 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
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/086—Sensing means, e.g. pressure sensors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6656—Closed loop control, i.e. control using feedback
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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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)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)

Abstract

本发明公开了一种等刚度双向加载智能液压机，包括反力结构架，在反力结构架的顶面固定竖向垂直轴加压千斤顶，在反力架的左面、右面固定水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶，竖向垂直轴加压千斤顶由变频调速直驱式竖向垂直轴加压泵和控制阀组控制，水平轴左侧和右侧的夹紧千斤顶由两套独立的变频调速直驱式水平轴夹紧泵和高压开关控制阀组控制，变频调速直驱式水平轴夹紧泵和控制阀组由第一实时控制器控制，变频调速直驱式竖向垂直轴加压泵和控制阀组由第二实时控制器控制，第一实时控制器、第二实时控制器与PLC控制器相连，通过第一实时控制器、第二实时控制器控制，使得水平轴夹紧力会自动适应竖向垂直轴的加压力同步比例增加或减小。

The invention discloses an equal-rigidity bidirectional loading intelligent hydraulic press, comprising a reaction force structure frame, a vertical vertical axis pressurizing jack fixed on the top surface of the reaction force structure frame, a horizontal axis left side clamping jack and a horizontal axis right side clamping jack fixed on the left and right sides of the reaction force frame, the vertical vertical axis pressurizing jack is controlled by a variable frequency speed regulation direct-driven vertical vertical axis pressurizing pump and a control valve group, the clamping jacks on the left and right sides of the horizontal axis are controlled by two independent sets of variable frequency speed regulation direct-driven horizontal axis clamping pumps and a high-pressure switch control valve group, the variable frequency speed regulation direct-driven horizontal axis clamping pump and the control valve group are controlled by a first real-time controller, the variable frequency speed regulation direct-driven vertical vertical axis pressurizing pump and the control valve group are controlled by a second real-time controller, the first real-time controller and the second real-time controller are connected to a PLC controller, and the horizontal axis clamping force is automatically adapted to the synchronous increase or decrease of the vertical axis pressurizing force through the control of the first real-time controller and the second real-time controller.

Description

Equal-rigidity bidirectional loading intelligent hydraulic machine
Technical Field
The invention relates to an equal-rigidity bidirectional loading intelligent hydraulic machine, and belongs to the technical field of hydraulic mechanical equipment.
Background
Hydraulic presses are machines that use hydrostatic pressure to process products such as metal, plastic, rubber, wood, powder, etc. It is commonly used in pressing and forming processes such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet drawing, powder metallurgy, press fitting, and the like.
Currently, main-stream hydraulic presses mainly concentrate on uniaxial compression and uniaxial stretching, in order to improve one-step molding of objects, in practical engineering application, in most cases, biaxial synchronous compression is usually required for molding of the objects, uniaxial compression and lateral mechanical positioning are performed, a plane stress state cannot be presented, and molded structural morphology is incomplete. In order to improve the molding efficiency of objects and the structural stability after molding, the existing bidirectional loading devices are all formed by reforming based on the existing single-shaft hydraulic press, and the conventional bidirectional loading devices have the common defects of smaller rigidity and unequal bidirectional rigidity although the molding production efficiency is improved due to limited reforming conditions, so that the compressed objects cannot be loaded with stable bidirectional equal rigidity.
Disclosure of Invention
In order to overcome the problems, the invention provides an equal-rigidity bidirectional loading intelligent hydraulic machine, which realizes the simultaneous vertical loading in two directions of an object component, a bidirectional equal-rigidity loading system can be used for loading to a set maximum loading force value or displacement value in two orthogonal directions respectively or synchronously in proportion, the structure component can be subjected to uniaxial or biaxial compression loading, and the two mutually perpendicular loading directions are controlled by a hydraulic servo through a control system, so that the loading speed and various loading combinations of bidirectional automatic mutual adaptation stress value changes can be automatically adjusted. Meanwhile, the system integrates a hydraulic pump station and an electric automatic control integrated structure.
In order to achieve the above object, the present invention is realized by the following technical scheme:
According to the embodiment of the invention, the vertical shaft pressurizing jack is fixed on the top surface of the counterforce structure frame, the horizontal shaft left clamping jack is fixed on the left surface of the counterforce frame, the horizontal shaft right clamping jack is fixed on the right surface of the counterforce frame, the vertical shaft pressurizing jack is controlled by the variable-frequency speed-regulating direct-drive vertical shaft pressurizing pump and the control valve group, the horizontal shaft left clamping jack and the horizontal shaft right clamping jack are controlled by two independent variable-frequency speed-regulating direct-drive horizontal shaft clamping pump and the high-pressure switch control valve group, the variable-frequency speed-regulating direct-drive horizontal shaft clamping pump and the high-pressure switch control valve group are controlled by a first real-time controller, the variable-frequency speed-regulating direct-drive vertical shaft pressurizing pump and the control valve group are controlled by a second real-time controller, the first real-time controller and the second real-time controller are connected with the PLC controller, the PLC controller is communicated with the industrial control operation controller, and the vertical shaft left side clamping jack and the horizontal shaft pressurizing jack are enabled to provide a vertical shaft with the vertical shaft pressurizing force or the vertical shaft with the vertical shaft, and the vertical shaft pressurizing jack is enabled to be in a vertical compression state or a vertical shaft compression state, and the vertical shaft is enabled to be in a vertical state.
As a further technical scheme, the vertical shaft pressurizing jack, the horizontal shaft left side clamping jack and the horizontal shaft right side clamping jack are used for carrying out real-time low revolution micro-adjustment on pressure and displacement changes through closed loop control in the pressurizing and bearing pressure maintaining processes of object components, full-process full-flow work is not needed, unnecessary energy loss is avoided, excessive high temperature of hydraulic oil in a system is avoided, energy consumption is greatly reduced, and the service life of the whole equipment is prolonged.
As a further technical scheme, the vertical shaft is provided with a plurality of independent pressurizing jacks, so that the molding pressurizing requirements of object components with different sizes and different forms are met, meanwhile, the hydraulic control system of the plurality of independent pressurizing jacks has the loading characteristic of synchronous proportion, and the pressurizing jacks can be subjected to the pre-set stress and displacement curve loading through the programming of a real-time controller, a PLC and an industrial control operation controller.
As a further technical scheme, a plurality of horizontal shaft left side clamping jacks and a plurality of horizontal shaft right side clamping jacks are arranged along the horizontal shaft, the requirement of pressurizing after the object components with different sizes and different forms are molded and clamped is met, meanwhile, a hydraulic control system of the hydraulic control system has the loading characteristic of synchronous proportion, and the hydraulic control system can be programmed through a real-time controller, a PLC (programmable logic controller) and an industrial control operation controller to realize the loading of preset stress and displacement curves on the horizontal shaft left side clamping jacks and the horizontal shaft right side clamping jacks.
As a further technical scheme, the vertical shaft pressurizing jack is provided with a displacement sensor and a pressure sensor, signals of the displacement sensor and the pressure sensor are collected and transmitted to the PLC through the real-time controller, and form closed-loop control with a pressurizing instruction signal sent by the PLC, so that deformation displacement and loading pressure of the vertical shaft pressurizing jack for pressurizing an object member are controlled in real time.
As a further technical scheme, in order to improve the signal stability and accuracy of the pressure sensor, a signal digital filter of the pressure sensor is arranged in the real-time controller, so that the pressure pulsation and interference in the high-pressure pipeline are eliminated, and the stability and accuracy of pressure monitoring are improved.
As a further technical scheme, the variable-frequency speed-regulating direct-drive vertical shaft booster pump is characterized in that a variable-frequency motor is driven by a variable-frequency speed-regulating controller, a motor shaft of the variable-frequency motor is directly connected with an ultrahigh-pressure radial plunger pump, and continuous flow change (displacement change) and pressure change (loading pressure change) of the booster pump are realized through a real-time controller.
As a further technical scheme, the variable frequency speed control direct-drive horizontal shaft clamping pump is characterized in that a variable frequency motor is driven by a variable frequency speed control controller, a motor shaft of the variable frequency motor is directly connected with the ultrahigh pressure radial plunger pump, and continuous flow change (displacement change) and pressure change (clamping pressure change) of the clamping pump are realized through a real-time controller.
As a further technical scheme, the horizontal shaft clamping jack and the horizontal shaft clamping jack are also provided with a displacement sensor and a pressure sensor, signals of the displacement sensor and the pressure sensor are collected and transmitted to the PLC through the real-time controller, and form closed-loop control with a clamping command signal sent by the PLC, so that deformation displacement and clamping pressure of the vertical shaft clamping jack to clamping an object member are controlled in real time.
As a further technical scheme, each loading jack is provided with a spherical saddle, so that uneven stress of the structural member caused by slight non-parallelism among the pressing surfaces of the structural member can be eliminated.
As a further technical scheme, the pressure sensors arranged on the left clamping jack of the horizontal shaft and the right clamping jack of the horizontal shaft eliminate pressure pulsation and interference in the high-pressure pipeline through the signal digital filter arranged in the real-time controller, so that the stability and accuracy of pressure monitoring are improved.
The beneficial effects of the embodiment of the invention are as follows:
The equal-rigidity bidirectional loading intelligent hydraulic press provided by the invention realizes simultaneous vertical loading in two directions of an object component, a bidirectional equal-rigidity loading system can be used for loading to a set maximum loading value in two orthogonal directions respectively or synchronously, uniaxial or biaxial compression loading can be carried out on the component, the two mutually vertical loading directions are controlled by a hydraulic servo through a control system, loading speed and various loading combinations which are not used in two directions can be automatically regulated, linear and curve loading is realized, meanwhile, the variable-frequency speed-regulation direct-drive type horizontal shaft clamping pump and the high-voltage switch control valve group are controlled by a first real-time controller, the variable-frequency speed-regulation direct-drive type vertical shaft pressure pump and the control valve group are controlled by a second real-time controller, and the pressure sensors and the displacement sensors are respectively controlled by the first real-time controller and the second real-time controller, so that the horizontal shaft clamping force provided by the horizontal shaft left clamping jack and the horizontal shaft right clamping jack can be automatically adapted to the synchronous proportion increase or decrease of the pressure of the vertical shaft output by the vertical shaft pressing jack, the object component presents a plane stress state, and the stability of the formed structure is improved.
Drawings
FIG. 1 is a front view of the hydraulic principle of one embodiment of the present invention;
FIG. 2 is a left side view of a hydraulic and control combination of the present invention;
Fig. 3 is an internal structural diagram of the variable frequency speed control direct drive type pump control system of the present invention.
In the figure, a 1-counterforce structure frame, a 2-pressure sensor, a 3-vertical shaft pressurizing jack, a 4-displacement sensor, a 5-object member, a 6-horizontal shaft left clamping jack, a 7-displacement sensor, an 8-pressure sensor, a 9-displacement sensor, a 10-horizontal shaft left clamping jack, an 11-pressure sensor, a 12-high-pressure switch control valve group, a 13-variable frequency speed regulation direct-drive horizontal shaft clamping pump, a 14-variable frequency speed regulation direct-drive vertical shaft pressurizing pump, a 141-variable frequency speed regulation controller, a 142-drive variable frequency motor, a 143-ultrahigh pressure radial plunger pump, a 15-control valve group, a 16-real-time controller, a 17-digital filter, an 18-wireless data transmission interface, a 19-industrial control operation controller and a 20-PLC controller.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as described in the background art, the invention provides an equal-rigidity bidirectional loading intelligent hydraulic machine for solving the technical problems.
In a typical implementation manner of the present invention, as shown in fig. 1, an equal-stiffness bidirectional loading intelligent hydraulic machine provided in this embodiment includes a reaction structure frame 1, a vertical shaft pressurizing jack 3, a horizontal shaft left clamping jack 6, a horizontal shaft right clamping jack 10, a variable-frequency speed-regulating direct-drive vertical shaft pressurizing pump 14 and a control valve group 15, a variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13 and a high-voltage switch control valve group 12, a real-time controller 16, a PLC controller 20, an industrial control operation controller 19, and a wireless data transmission interface 18, and meanwhile, the intelligent hydraulic machine integrates a hydraulic pump station and an electric automatic control. Wherein the real-time controller 16 includes two real-time controllers, a first real-time controller and a second real-time controller.
The vertical shaft pressurizing jack 3 is fixed on the top surface of the reaction structure frame 1, the horizontal shaft left clamping jack 6 is fixed on the left surface of the reaction frame, the horizontal shaft right clamping jack 10 is fixed on the right surface of the reaction frame, the vertical shaft pressurizing jack 3 is controlled by the variable frequency speed regulation direct-drive type vertical shaft pressurizing pump 14 and the control valve group 15, the horizontal shaft left clamping jack and the horizontal shaft right clamping jack are controlled by two independent variable frequency speed regulation direct-drive type horizontal shaft clamping pump 13 and the high-pressure switch control valve group 12, the variable frequency speed regulation direct-drive type horizontal shaft clamping pump 13 and the high-pressure switch control valve group 12 are controlled by a first real-time controller, the variable frequency speed regulation direct-drive type vertical shaft pressurizing pump 14 and the control valve group 15 are controlled by a second real-time controller, the first real-time controller and the second real-time controller are connected with the PLC controller, the PLC controller 20 is communicated with the industrial control operation controller 19, and the horizontal shaft left side clamping jack and the horizontal shaft right clamping jack are controlled by the first real-time controller and the second real-time controller, the horizontal shaft clamping jack can automatically adapt to the vertical shaft pressurizing jack to the vertical shaft clamping force output by the vertical shaft clamping jack, the vertical shaft clamping force is controlled by the first real-time controller, the vertical shaft clamping force is increased or the vertical shaft clamping member is stressed, the stability is improved, and the stability of a vertical structure is improved, and the vertical structure is formed.
The hydraulic control system adopted in the embodiment is a variable-frequency speed-regulating direct-drive pump control system, the vertical shaft pressurizing jack 3, the horizontal shaft left side clamping jack 6 and the horizontal shaft right side clamping jack 10 are used for carrying out low-revolution micro-regulation through closed-loop control in the pressurizing and bearing pressure maintaining processes of the object component 5, full-flow work in the whole process is not needed, unnecessary energy loss is not generated, excessive temperature of hydraulic oil in the system is not generated, the energy consumption is greatly reduced, and the service life of the whole equipment is prolonged.
Further, as shown in fig. 2, in this embodiment, 4 independent pressurizing jacks are disposed on the vertical shaft, so as to meet the molding and pressurizing requirements of the object members 5 with different sizes and different forms, meanwhile, the hydraulic control system of the pressurizing jacks has the loading characteristic of synchronous proportion, the 4 independent pressurizing jacks are respectively controlled by four variable-frequency speed-regulating direct-drive vertical shaft pressurizing pumps 14 and a control valve group 15, namely, one pressurizing jack corresponds to one variable-frequency speed-regulating direct-drive vertical shaft pressurizing pump 14 and the control valve group 15, the four variable-frequency speed-regulating direct-drive vertical shaft pressurizing pumps 14 and the control valve group 15 are controlled by a first real-time controller, and the four pressurizing jacks are subjected to preset pressure or displacement curve loading by programming the first real-time controller, the PLC controller 20 and the industrial control operation controller 19.
Further, in this embodiment, 4 independent clamping jacks are respectively disposed on the left and right sides of the horizontal shaft, so that the requirement of pressurizing after the object members with different sizes and different forms are formed and clamped is met, and meanwhile, the hydraulic control system has the loading characteristic of synchronous proportion, and the real-time controller 16, the PLC controller 20 and the industrial control operation controller 19 can be used for programming, so that the clamping jack 6 can be loaded with preset pressure or displacement curves.
In this embodiment, in the embodiment, 2 groups of variable-frequency speed-regulating direct-drive horizontal shaft clamping pumps 13 and high-voltage switch control valve groups 12 are shared, one group of control horizontal shaft left-side clamping jacks 6 is controlled, the other group of control horizontal shaft right-side clamping jacks 10 is respectively provided with 4 clamping jacks on the left side and the right side of the horizontal shaft, the clamping jacks on each side are divided into two paths of equal-pressure displacement clamping according to the clamping characteristics of the horizontal shaft on an object member 5, as shown in fig. 2, four clamping jacks on the left side respectively form two paths (2 paths), the two paths of clamping jacks are controlled by one variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13 and two paths of high-voltage switch control valve groups 12, therefore, four clamping jacks on the left side of the horizontal shaft are controlled by one variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13, and four clamping jacks on the right side of the horizontal shaft are controlled by the other variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13, and the two paths of high-voltage switch control valve groups 12 are clamped on each side of the four clamping jacks on the right side of the horizontal shaft through PWM (2 paths) command signals sent by a PLC controller 20 and a real-time controller 16. In this embodiment, the arrangement of the horizontal shaft clamping jack has a specific design, namely, the locking and fixing of the horizontal shaft clamping jack on one side is satisfied, and the jacking force is synchronously applied to the object member 5 on the other side according to the vertical pressurizing jack. The synchronous jacking and clamping of the object members 5 on two sides of the horizontal shaft can be met, and the synchronous force application of the vertical pressurizing jack following the vertical pressurizing jack is automatically adapted.
Further, in this embodiment, the vertical axis pressurizing jack 3 is provided with a displacement sensor 2 and a pressure sensor 4, signals of the displacement sensor 2 and the pressure sensor 4 are collected by the real-time controller 16 and transmitted to the PLC controller 20, and form closed loop control with a pressurizing command signal sent by the PLC controller 20, so as to complete real-time control of deformation displacement and loading pressure of the vertical axis pressurizing jack for pressurizing the object member 5.
Further, in this embodiment, by independently controlling the vertical axis pressurizing jacks 3, programming is performed according to the industrial control operation controller 19, and each group of vertical axis pressurizing jacks 3 is driven to be controlled, so that the pressurizing requirements of multiple modes for forming the object members 5 with different sizes and different forms can be met (not only the constant pressure equal force pressurizing and the proportional curve pressurizing are limited).
Because the equal-rigidity bidirectional loading intelligent hydraulic machine has higher loading pressure and real-time requirements on the vertical shaft pressurizing jack 3, the equal-rigidity bidirectional loading intelligent hydraulic machine is an important index of the forming stability of the object component 5, and therefore, the signal stability and accuracy of the pressurizing detection pressure sensor 4 of the vertical shaft pressurizing jack 3 are very critical.
Further, the variable-frequency speed-regulating direct-drive vertical shaft booster pump 14 is formed by driving a variable-frequency motor 142 by a variable-frequency speed-regulating controller 141, wherein a motor shaft of the variable-frequency motor 142 is directly connected with an ultrahigh-pressure radial plunger pump 143, and continuous flow change (displacement change) and pressure change (loading pressure change) of the booster pump are realized by the real-time controller 16.
Preferably, the variable frequency motor 142 drives the vertical shaft booster pump, and the output oil quantity and pressure can be adjusted steplessly. The vertical shaft booster pump is of an ultrahigh pressure radial plunger pump 143 structure, is a valve flow distribution plunger pump, has the output efficiency of more than 0.98, and can achieve high-efficiency and accurate oil quantity when the variable frequency motor 142 drives the ultrahigh pressure radial plunger pump 143 at a low revolution, so that the high-precision displacement or force loading function is achieved.
Further, in the system disclosed in this embodiment, there are 4 groups of variable-frequency speed-regulating direct-drive vertical shaft pressurizing pumps 14, each group independently controls the vertical shaft pressurizing jack 3, and each group of vertical shaft pressurizing jack 3 is controlled by programming according to the industrial control operation controller 19, so that the pressurizing requirements of multiple modes (not only equal-pressure equal-force pressurizing and proportional curve pressurizing) for forming object members 5 with different sizes and different forms can be met.
In this embodiment, the variable frequency speed control direct-drive horizontal shaft clamping pump 13 is also a variable frequency motor driven by a variable frequency speed control device, and the motor shaft of the variable frequency motor is directly connected with the ultra-high pressure radial plunger pump 143, so as to realize continuous flow change (displacement change) and pressure change (clamping pressure change) of the clamping pump through the real-time controller 16.
In the embodiment, a displacement sensor 7 and a pressure sensor 8 are also arranged on the left clamping jack 6 of the horizontal shaft, a displacement sensor 9 and a pressure sensor 11 are also arranged on the right clamping jack 10 of the horizontal shaft, signals of the displacement sensors and the pressure sensors are collected and transmitted to the PLC 20 through the real-time controller, and a closed loop control is formed by the signals of the displacement sensors and the pressure sensors and the clamping command signals sent by the PLC 20, so that deformation displacement and clamping pressure of the vertical shaft pressing jack on clamping of an object member 5 are controlled in real time.
In the embodiment, the pressure sensor 8 and the pressure sensor 11 arranged on the horizontal shaft left side clamping jack 6 and the horizontal shaft left side clamping jack 10 also eliminate pressure pulsation and interference in a high-pressure pipeline through a signal digital filter 17 arranged in a real-time controller 16, so that the stability and the accuracy of pressure monitoring are improved.
The control method of the electric control system of the medium-rigidity bidirectional loading intelligent hydraulic machine comprises the following steps that an industrial control operation controller 19 installed in the system issues a horizontal shaft pre-clamping pressure control command, a variable-frequency speed regulation controller is controlled through output of a PLC (programmable logic controller) 20 and a real-time controller 16, a variable-frequency speed regulation direct-drive horizontal shaft clamping pump 13 is driven, force closed loop control is formed by the variable-frequency speed regulation direct-drive horizontal shaft clamping pump 13 and pressure sensors installed on a left clamping jack of the horizontal shaft and a right clamping jack of the horizontal shaft, and pressure control regulation is carried out through regulating the rotating speed of a variable-frequency motor on the variable-frequency speed regulation direct-drive horizontal shaft clamping pump 13.
After the vertical shaft pressurizing jack is pre-clamped in place, the industrial control operation controller 19 issues a pressure control instruction for pre-pressing the vertical shaft pressurizing jack 3, the variable frequency speed regulation controller 141 is controlled by outputting through the PLC 20 and the real-time controller 16, the direct-drive vertical shaft pressurizing pump is driven, force closed-loop control is formed by the direct-drive vertical shaft pressurizing pump and a pressure sensor arranged on the vertical shaft pressurizing jack 3, and pressure control adjustment is performed by adjusting the rotating speed of the variable frequency motor 142;
After the vertical shaft pressurizing jack 3 is pre-pressed, the industrial control operation controller 19 operates the pressurizing process according to the molding pressurizing characteristic of the object component 5 preset by a user, and controls the variable-frequency speed-regulating direct-drive vertical shaft pressurizing pump 14, the control valve group 15, the variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13 and the high-voltage switch control valve group 12 through the output of the PLC 20 and the real-time controller 16, so as to drive the vertical shaft pressurizing jack 3, the horizontal shaft clamping jack 6 and the horizontal shaft clamping jack 10 to carry out preset gesture synchronous control, and realize the automatic control of the whole pressing molding process of the object component 5.
Further, an operational amplifier and an integral arithmetic unit are arranged in the real-time controller 16, signal data of the displacement sensor and the pressure sensor are collected to an operation center in real time, and are operated with a displacement instruction and a pressure instruction sent by the PLC controller 20, and are processed by the amplifier and the integral arithmetic unit and then are output to a corresponding variable-frequency speed-regulating controller, so that the variable-frequency speed-regulating direct-drive vertical shaft booster pump 14 and the variable-frequency speed-regulating direct-drive horizontal shaft clamping pump 13 are controlled to supply oil to the vertical compression jack and the horizontal shaft clamping jack. The operational amplifier also produces a PWM pulse width control circuit to control the high voltage switch control valve block 12 to control the horizontal shaft clamping jack. The specific working principle is described in the attached drawings.
Further, the wireless data transmission interface 18 is installed inside the electrical control box, and transmits all parameters of the vertical pressurizing force, the displacement, the horizontal shaft clamping force, the displacement and the intelligent hydraulic machine working collected by the real-time controller 16 to a computer client or a mobile phone client of an operating user in real time through a wireless WIFI-4G network, so that the real-time monitoring of the user in the equal-stiffness bidirectional loading intelligent hydraulic machine working process is satisfied.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1.一种等刚度双向加载智能液压机，其特征在于，包括反力结构架，在反力结构架的顶面固定竖向垂直轴加压千斤顶，在反力架的左面固定水平轴左侧夹紧千斤顶，在反力架的右面固定水平轴右侧夹紧千斤顶，所述的竖向垂直轴加压千斤顶由变频调速直驱式竖向垂直轴加压泵和控制阀组控制，水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶由两套独立的变频调速直驱式水平轴夹紧泵和高压开关控制阀组控制，所述的变频调速直驱式水平轴夹紧泵和高压开关控制阀组由第一实时控制器控制，所述的变频调速直驱式竖向垂直轴加压泵和控制阀组由第二实时控制器控制，所述的第一实时控制器、第二实时控制器与PLC控制器相连，PLC控制器与工控操作控制器通讯，通过第一实时控制器、第二实时控制器的控制，使得水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶提供的水平轴夹紧力会自动适应竖向垂直轴加压千斤顶输出的竖向垂直轴的加压力同步比例增加或减小。1. An equal-rigidity bidirectional loading intelligent hydraulic press, characterized in that it comprises a reaction force structure frame, a vertical vertical axis pressure jack is fixed on the top surface of the reaction force structure frame, a horizontal axis left side clamping jack is fixed on the left side of the reaction force frame, and a horizontal axis right side clamping jack is fixed on the right side of the reaction force frame, the vertical vertical axis pressure jack is controlled by a variable frequency speed regulation direct drive vertical vertical axis pressure pump and a control valve group, the horizontal axis left side clamping jack and the horizontal axis right side clamping jack are controlled by two sets of independent variable frequency speed regulation direct drive horizontal axis clamping pumps and high pressure switch control valve groups, the variable frequency speed regulation direct drive water The horizontal axis clamping pump and the high-pressure switch control valve group are controlled by the first real-time controller, and the variable frequency speed regulation direct-drive vertical axis pressurizing pump and the control valve group are controlled by the second real-time controller. The first real-time controller and the second real-time controller are connected to the PLC controller, and the PLC controller communicates with the industrial control operation controller. Through the control of the first real-time controller and the second real-time controller, the horizontal axis clamping force provided by the clamping jack on the left side of the horizontal axis and the clamping jack on the right side of the horizontal axis will automatically adapt to the synchronous increase or decrease of the vertical axis pressurizing force output by the vertical axis pressurizing jack. 2.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的竖向垂直轴加压千斤顶、水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶在物体构件的加压和承载保压过程中，压力和位移的变化均通过闭环控制进行实时低转数微量调节。2. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the changes in pressure and displacement of the vertical axis pressurizing jack, the horizontal axis left clamping jack, and the horizontal axis right clamping jack are all adjusted in real time at low speeds through closed-loop control during the pressurization and load-bearing pressure-maintaining process of the object component. 3.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的竖向垂直轴加压千斤顶设置多台，多台独立的竖向垂直轴加压千斤顶由变频调速直驱式竖向垂直轴加压泵和控制阀组按照一定比例压力和位移方式同步加载，实现对竖向垂直轴加压千斤顶进行预设应力和位移曲线加载。3. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that a plurality of vertical vertical axis pressure jacks are provided, and the plurality of independent vertical vertical axis pressure jacks are synchronously loaded by a variable frequency speed regulation direct-drive vertical vertical axis pressure pump and a control valve group in a certain proportional pressure and displacement manner, thereby realizing preset stress and displacement curve loading of the vertical vertical axis pressure jacks. 4.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶各设置多台，多台独立的水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶由变频调速直驱式水平轴夹紧泵和高压开关控制阀组控制按照一定比例压力和位移方式同步加载，实现对水平轴左侧夹紧千斤顶、水平轴右侧夹紧千斤顶进行预设应力和位移曲线加载。4. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the horizontal axis left side clamping jack and the horizontal axis right side clamping jack are each provided with a plurality of units, and the plurality of independent horizontal axis left side clamping jacks and the horizontal axis right side clamping jacks are controlled by a variable frequency speed regulation direct drive horizontal axis clamping pump and a high-pressure switch control valve group to be synchronously loaded in a certain proportional pressure and displacement manner, so as to realize the preset stress and displacement curve loading of the horizontal axis left side clamping jack and the horizontal axis right side clamping jack. 5.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的竖向垂直轴加压千斤顶上安装有位移传感器和压力传感器，位移传感器和压力传感器的信号通过第一实时控制器采集传送到PLC控制器中，与PLC控制器的发出的加压指令信号组成闭环控制，完成实时控制竖向垂直轴加压千斤顶对物体构件加压的变形位移和加载压力；在第一实时控制器中安装有压力传感器的信号数字滤波器，提高压力监测的稳定性和准确性。5. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that a displacement sensor and a pressure sensor are installed on the vertical vertical axis pressurizing jack, and the signals of the displacement sensor and the pressure sensor are collected and transmitted to the PLC controller through the first real-time controller, and form a closed-loop control with the pressurizing command signal issued by the PLC controller to complete the real-time control of the deformation displacement and loading pressure of the vertical vertical axis pressurizing jack on the object component; a signal digital filter of the pressure sensor is installed in the first real-time controller to improve the stability and accuracy of pressure monitoring. 6.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的变频调速直驱式竖向垂直轴加压泵，由变频调速控制器驱动变频电机，变频电机的电机轴直接与超高压径向柱塞泵连接，通过第一实时控制器，实现加压泵连续的流量变化和压力变化。6. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the variable frequency speed regulation direct-drive vertical vertical axis pressure pump is driven by a variable frequency speed regulation controller to drive a variable frequency motor, and the motor shaft of the variable frequency motor is directly connected to the ultra-high pressure radial piston pump, and the continuous flow change and pressure change of the pressure pump are realized through the first real-time controller. 7.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的变频调速直驱式水平轴夹紧泵，由变频调速控制器驱动变频电机，变频电机的电机轴直接与超高压径向柱塞泵连接，通过第二实时控制器，实现夹紧泵连续的流量变化和压力变化。7. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the variable frequency speed regulation direct-drive horizontal axis clamping pump is driven by a variable frequency speed regulation controller to drive a variable frequency motor, and the motor shaft of the variable frequency motor is directly connected to the ultra-high pressure radial piston pump, and through the second real-time controller, continuous flow changes and pressure changes of the clamping pump are realized. 8.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的水平轴左侧夹紧千斤顶和水平轴右侧夹紧千斤顶上均安装有位移传感器和压力传感器，位移传感器和压力传感器的信号通过实时控制器采集传送到PLC控制器中，与PLC控制器的发出的夹紧指令信号组成闭环控制，完成实时控制竖向垂直轴加压千斤顶对物体构件夹紧的变形位移和夹紧压力。8. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the horizontal axis left clamping jack and the horizontal axis right clamping jack are both equipped with displacement sensors and pressure sensors, and the signals of the displacement sensor and the pressure sensor are collected and transmitted to the PLC controller through the real-time controller, and form a closed-loop control with the clamping command signal issued by the PLC controller, so as to complete the real-time control of the deformation displacement and clamping pressure of the vertical axis pressurizing jack on the object component. 9.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，每个千斤顶上均设置了球形纠偏鞍座，实现受力面和反力面的不平整度的自动纠偏调节。9. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that a spherical correction saddle is provided on each jack to realize automatic correction adjustment of the unevenness of the force-bearing surface and the reaction surface. 10.如权利要求1所述的等刚度双向加载智能液压机，其特征在于，所述的水平轴左侧夹紧千斤顶和水平轴右侧夹紧千斤顶上安装的压力传感器通过实时控制器中安装的信号数字滤波器，将高压管路中的压力脉动和干扰消除，提高压力监测的稳定性和准确性。10. The equal-rigidity bidirectional loading intelligent hydraulic press as described in claim 1 is characterized in that the pressure sensors installed on the clamping jack on the left side of the horizontal axis and the clamping jack on the right side of the horizontal axis eliminate the pressure pulsation and interference in the high-pressure pipeline through the signal digital filter installed in the real-time controller, thereby improving the stability and accuracy of pressure monitoring.
CN202210575079.5A 2022-05-25 2022-05-25 An intelligent hydraulic press with equal stiffness and bidirectional loading Active CN114738355B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208503123U (en) * 2018-06-07 2019-02-15 沃得精机(中国)有限公司 A kind of mobile work platform clamping cylinder, liftout tank hydraulic control device
CN112362574A (en) * 2020-11-23 2021-02-12 西安建筑科技大学 Concrete seismic damage test system and method in construction period

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3761613B2 (en) * 1995-09-06 2006-03-29 北川精機株式会社 Press machine
JP2004050275A (en) * 2002-07-23 2004-02-19 Ishikawajima Harima Heavy Ind Co Ltd Hybrid hot press equipment
WO2005035232A1 (en) * 2003-10-09 2005-04-21 The Coe Manufacturing Company Platen press
CN110369537A (en) * 2019-08-16 2019-10-25 苏州虹逸重工科技有限公司 Double-station bidirectional horizontal Gimbal servo numerical control hydraulic extrusion press

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208503123U (en) * 2018-06-07 2019-02-15 沃得精机(中国)有限公司 A kind of mobile work platform clamping cylinder, liftout tank hydraulic control device
CN112362574A (en) * 2020-11-23 2021-02-12 西安建筑科技大学 Concrete seismic damage test system and method in construction period

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