CN104564920A - System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing - Google Patents
System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing Download PDFInfo
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- CN104564920A CN104564920A CN201410662840.4A CN201410662840A CN104564920A CN 104564920 A CN104564920 A CN 104564920A CN 201410662840 A CN201410662840 A CN 201410662840A CN 104564920 A CN104564920 A CN 104564920A
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- Prior art keywords
- oil cylinder
- pressure
- valve
- proportional reversing
- binder oil
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Classifications
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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
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a system for controlling the pressure relief and the return stroke of a plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing. The system comprises a swaging oil cylinder, wherein the pressure cavity of the swaging oil cylinder is provided with a pressure sensor and a pressure gauge; a pressure signal is transmitted to a PLC (programmable logic controller) input module by the pressure sensor; a logic cartridge valve is installed in the control cavity of the swaging oil cylinder; the pilot control part of the logic cartridge valve is a two-position four-way proportional directional valve; the two-position four-way proportional directional valve is connected with a PLC output module. According to the system, a semi-closed loop swaging oil cylinder unloading and return stroke control system is formed, a PLC control system is used for controlling and detecting, pressure in the swaging oil cylinder is detected in real time, and the swaging oil cylinder is not permitted to carry out return stroke until the value of pressure in the swaging oil cylinder achieves a very small pressure value is detected to be very small, so that the return stroke impact, vibration and noise of the swaging oil cylinder can be greatly reduced, the stable pressure relief and the flexible return stroke are realized, and the system is suitable for plate shearing machines with a wide table board and an ultra-wide table board.
Description
Technical field
The invention belongs to guillotine shear industry, relate to guillotine shear binder oil cylinder release backhaul control system, be specifically related to a kind of based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system.
Background technique
At present, the control mode of domestic external brake formula guillotine shear binder oil cylinder is all substantially similar, is binder oil cylinder and retracts under spring force, under pressure oil effect, stretch out compression.Especially the binder pin number one of wide-bed-type press brake face, ultra-wide table top (more than ten meters) lock formula guillotine shear is often tens even more than twenties, the impacting force of general binder pin reaches as high as the shear pressure of main system, about 21 MPas, the valve of HYDRAULIC CONTROL SYSTEM binder oil cylinder oil return is 40 latus rectum logic cartridge valves.Binder oil cylinder binder is complete, logic cartridge valve moment opens completely, the high pressure oil of 21 MPas in tens binder oil cylinders, suddenly discharged by 40 latus rectum logic cartridge valves instantaneously, binder oil cylinder is under the reaction of spring force, rapid backhaul, impact is large, vibrations are large, and noise is large, and even whole lathe is all rocking, be difficult to meet the requirement of current machine tool field to Noise Reduction of Machine Tool damping, especially even more serious for the lock formula guillotine shear in wide-bed-type press brake face.Along with the improvement of technology, by the logic cartridge valve latus rectum controlling the oil return of binder oil cylinder being reduced or reducing vibrations to damping logic cartridge inserted valve control cover board installing fixed size additional, reduce noise, but this kind of method causes binder oil cylinder to occur backhaul or a part of backhaul or backhaul phenomenon not in place occurring, and affects the progress of work.
Summary of the invention
The present invention, in order to impact the problem large, serious vibration, noise are large when solving the backhaul of binder oil cylinder, provides a kind of based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system.
In order to solve the problem, the present invention adopts following technological scheme:
A kind of based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, comprise binder oil cylinder, the pressure chamber of described binder oil cylinder is provided with pressure transducer and pressure gauge, and pressure signal is transferred to PLC output module by this pressure transducer; Be provided with logic cartridge valve in the control chamber of binder oil cylinder, the pilot control part of this logic cartridge valve is two-position four-way proportional reversing valve, and this two-position four-way proportional reversing valve connects with PLC output module.
The A mouth of described logic cartridge valve is connected with the P mouth of two-position four-way proportional reversing valve by control loop, the B mouth of logic cartridge valve connects with the T mouth of two-position four-way proportional reversing valve, fuel tank respectively, the control port K mouth of logic cartridge valve connects with the A mouth of two-position four-way proportional reversing valve, and the B mouth of two-position four-way proportional reversing valve is closed.
Described logic cartridge valve is 40 latus rectum logic cartridge valves.
One-way valve is connected with in the in-line of described binder oil cylinder.
The invention has the beneficial effects as follows: how highly the invention provides binder pressure when no matter one is sheared wide-bed-type press brake face lock formula guillotine shear, the proportional linearity characteristic of proportion of utilization selector valve, with pressure transducer with the use of, the binder oil cylinder off-load of a semiclosed loop can be formed, backhaul control system, by PLC control system leak control and check, pressure in binder oil cylinder is detected in real time, until when the pressure detecting in binder oil cylinder reaches a very little force value, binder oil cylinder is just allowed to carry out backhaul, now Proportional valve is all opened, binder oil cylinder carries out return, make the back stroke impact of binder oil cylinder, vibration, noise reduces greatly, whole lathe is made to meet the requirement of noise reduction damping, the present invention can complete the Real-Time Monitoring of wide-bed-type press brake face and ultra-wide table top guillotine shear binder oil cylinder working-pressure, realize the steady release of pressure and flexible return.The present invention opens gradually due to proportional reversing valve, the logic cartridge valve controlled by it also just opening gradually, meanwhile binder oil cylinder is also just retracted gradually slowly, until proportional reversing valve is all opened, the logic cartridge valve controlled by it is also all opened, remaining stroke covered rapidly by binder oil cylinder, turn back to the initial position preparing binder, because the high pressure oil in binder oil cylinder is slow releasing gradually in the middle of this process, binder oil cylinder is backhaul slowly gradually thereupon also, thus solve the inertia impact of the release impact that discharges rapidly of binder oil cylinder working-pressure short time that switch valve controls and the rapid backhaul under reactive spring force of binder oil cylinder, a Flexible Control can be achieved to the backhaul of binder oil cylinder, damping noise reduction object is achieved concerning whole guillotine shear, final proportional reversing valve opens completely, opens completely by its control logic cartridge valve, and therefore avoiding binder oil cylinder cannot backhaul or backhaul phenomenon not in place occur.
Accompanying drawing explanation
Fig. 1. be structural representation of the present invention.
Fig. 2. be PLC control graph of the present invention
Reference character: 1-one-way valve; 2-binder oil cylinder; 3-pressure transducer; 4-pressure gauge; 5-fuel tank; 6-logic cartridge valve; 7-logic cartridge inserted valve control cover board; 8-two-position four-way proportional reversing valve; 9-PLC module; 10-Analog input mModule; 11-analog output module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated:
A kind of based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, comprise binder oil cylinder, one-way valve is connected with in the in-line of described binder oil cylinder, the pressure chamber of described binder oil cylinder is provided with pressure transducer and pressure gauge, and pressure signal is transferred to PLC Analog input mModule by this pressure transducer; Be provided with cartridge valve in the control chamber of binder oil cylinder, described cartridge valve is 40 latus rectum logic cartridge valves, and the pilot control part of this cartridge valve is two-position four-way proportional reversing valve; The A mouth of described logic cartridge valve is connected with the P mouth of two-position four-way proportional reversing valve by control loop, the B mouth of logic cartridge valve connects with the T mouth of two-position four-way proportional reversing valve, fuel tank respectively, the control port K mouth of logic cartridge valve connects with the A mouth of two-position four-way proportional reversing valve, and the B mouth of two-position four-way proportional reversing valve is closed.The pressure transducer that described binder oil cylinder working-pressure chamber is installed by pressure signal Real-time Feedback to the Analog input mModule of PLC, DA value size via the conversion of PLC Analog input mModule adjusts voltage or the electric current that PLC analog output module outputs to two-position four-way proportional reversing valve, thus control the size of two-position four-way proportional reversing valve opening, the opening degree controlling cartridge valve control chamber oil return flow and oil return speed and control cartridge valve and opening speed, realize the control to the release of binder pin and oil return return.
In system, pressing system and guillotine shear cutting system separate by one-way valve 1, prevent mutual interference, simultaneously in the middle of the process sheared, play the effect that binder keeps; Pressure transducer 3 detects binder oil cylinder working-pressure and shows binder pressure by pressure gauge 4, logic cartridge valve 6 controls binder oil cylinder 2 oil return, logic cartridge valve cover plate 7 and two-position four-way proportional reversing valve 8 form logic cartridge valve control loop, jointly for the open and close of control logic cartridge valve.During use, the minimum pressure that namely a minimum pressure allows binder oil cylinder 2 return is set to pressure transducer 3, when shearing complete binder oil cylinder and preparing return, PLC analog output module 11 gives two-position four-way proportional reversing valve 8 to a very little order, now two-position four-way proportional reversing valve 8 opens very little opening, the high voltage control oil of control logic cartridge valve 6 gets back to fuel tank 5 by the little opening of two-position four-way proportional reversing valve 8, high pressure oil in binder oil cylinder lays down a part, and the pressure in binder oil cylinder 2 reduces.The pressure of binder oil cylinder 2 feeds back to PLC Analog input mModule 10 by pressure transducer 3, compare with the minimum pressure set in PLC, if the pressure in binder oil cylinder 2 is still higher than set minimum pressure, two-position four-way proportional reversing valve 8 continues to increase at the instruction under shed of PLC analog output module 11, logic cartridge valve 6 opening continues to strengthen, pressure oil in binder oil cylinder 2 proceeds stress-relief process by logic cartridge valve 6, until reach the minimum pressure set by PLC, PLC sends the signal allowing backhaul, at this moment PLC analog output module 11 gives 8 one instructions of two-position four-way proportional reversing valve, two-position four-way proportional reversing valve 8 is all opened, logic cartridge valve by two-position four-way proportional reversing valve 8 completely and fuel tank connect, when logic cartridge valve is opened completely, the rapid return of binder oil cylinder, the operating mode of binder oil cylinder release backhaul is finished.
Claims (4)
1. one kind based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, it is characterized in that: comprise binder oil cylinder, the pressure chamber of described binder oil cylinder is provided with pressure transducer and pressure gauge, and pressure signal is transferred to PLC output module by this pressure transducer; Be provided with logic cartridge valve in the control chamber of binder oil cylinder, the pilot control part of this logic cartridge valve is two-position four-way proportional reversing valve, and this two-position four-way proportional reversing valve connects with PLC output module.
2. one according to claim 1 is based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, it is characterized in that: the A mouth of described logic cartridge valve is connected with the P mouth of two-position four-way proportional reversing valve by control loop, the B mouth of logic cartridge valve connects with the T mouth of two-position four-way proportional reversing valve, fuel tank respectively, the control port K mouth of logic cartridge valve connects with the A mouth of two-position four-way proportional reversing valve, and the B mouth of two-position four-way proportional reversing valve is closed.
3. one according to claim 1 is based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, it is characterized in that: described logic cartridge valve is 40 latus rectum logic cartridge valves.
4. the one according to any one of claim 1-3, based on electric-hydraulic proportion commutation control guillotine shear binder oil cylinder release back haul system, is characterized in that: be connected with one-way valve in the in-line of described binder oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662840.4A CN104564920A (en) | 2014-11-19 | 2014-11-19 | System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662840.4A CN104564920A (en) | 2014-11-19 | 2014-11-19 | System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing |
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| Publication Number | Publication Date |
|---|---|
| CN104564920A true CN104564920A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410662840.4A Pending CN104564920A (en) | 2014-11-19 | 2014-11-19 | System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing |
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| CN (1) | CN104564920A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864274A (en) * | 2021-10-18 | 2021-12-31 | 山东泰丰智能控制股份有限公司 | Lifting hydraulic control system |
| CN117754034A (en) * | 2024-02-22 | 2024-03-26 | 太原理工大学 | Metal plate rolling shearing machine driven by hydraulic cylinder in vertical installation mode |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378303B1 (en) * | 1998-07-07 | 2002-04-30 | Kobe Steel, Ltd. | Hydraulic control device of a working machine |
| CN2792669Y (en) * | 2005-04-21 | 2006-07-05 | 南京埃尔法电液技术有限公司 | Hydraulic system of pendulum clipper |
| CN2818031Y (en) * | 2005-04-21 | 2006-09-20 | 南京埃尔法电液技术有限公司 | Hydraulic system of brake style plate shearing machine |
| CN201579474U (en) * | 2009-12-15 | 2010-09-15 | 天水锻压机床有限公司 | Vertical plate shearing machine worktable hydraulic proportion control deflection compensating system |
| CN202203216U (en) * | 2011-08-28 | 2012-04-25 | 武汉威明德科技发展有限公司 | Automatic electrohydraulic proportional control test system of accumulator |
| CN202621804U (en) * | 2012-06-19 | 2012-12-26 | 通裕重工股份有限公司 | Large-through diameter pressure relief system for free forging oil hydraulic press |
| CN103586527A (en) * | 2013-11-26 | 2014-02-19 | 山东泰丰液压股份有限公司 | Valve type plate shearer hydraulic control system with safety protection device |
| CN103899586A (en) * | 2014-04-23 | 2014-07-02 | 南通恒力重工机械有限公司 | Ultra-large type plate shearing machine synchronous hydraulic system based on flow distributing and collecting valve |
-
2014
- 2014-11-19 CN CN201410662840.4A patent/CN104564920A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378303B1 (en) * | 1998-07-07 | 2002-04-30 | Kobe Steel, Ltd. | Hydraulic control device of a working machine |
| CN2792669Y (en) * | 2005-04-21 | 2006-07-05 | 南京埃尔法电液技术有限公司 | Hydraulic system of pendulum clipper |
| CN2818031Y (en) * | 2005-04-21 | 2006-09-20 | 南京埃尔法电液技术有限公司 | Hydraulic system of brake style plate shearing machine |
| CN201579474U (en) * | 2009-12-15 | 2010-09-15 | 天水锻压机床有限公司 | Vertical plate shearing machine worktable hydraulic proportion control deflection compensating system |
| CN202203216U (en) * | 2011-08-28 | 2012-04-25 | 武汉威明德科技发展有限公司 | Automatic electrohydraulic proportional control test system of accumulator |
| CN202621804U (en) * | 2012-06-19 | 2012-12-26 | 通裕重工股份有限公司 | Large-through diameter pressure relief system for free forging oil hydraulic press |
| CN103586527A (en) * | 2013-11-26 | 2014-02-19 | 山东泰丰液压股份有限公司 | Valve type plate shearer hydraulic control system with safety protection device |
| CN103899586A (en) * | 2014-04-23 | 2014-07-02 | 南通恒力重工机械有限公司 | Ultra-large type plate shearing machine synchronous hydraulic system based on flow distributing and collecting valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864274A (en) * | 2021-10-18 | 2021-12-31 | 山东泰丰智能控制股份有限公司 | Lifting hydraulic control system |
| CN117754034A (en) * | 2024-02-22 | 2024-03-26 | 太原理工大学 | Metal plate rolling shearing machine driven by hydraulic cylinder in vertical installation mode |
| CN117754034B (en) * | 2024-02-22 | 2024-04-30 | 太原理工大学 | Metal plate rolling shearing machine driven by hydraulic cylinder in vertical installation mode |
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| PB01 | Publication | ||
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Application publication date: 20150429 |