CN107120328A - The process control system and control method of isothermal forging hydropress - Google Patents
The process control system and control method of isothermal forging hydropress Download PDFInfo
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- CN107120328A CN107120328A CN201710283274.XA CN201710283274A CN107120328A CN 107120328 A CN107120328 A CN 107120328A CN 201710283274 A CN201710283274 A CN 201710283274A CN 107120328 A CN107120328 A CN 107120328A
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- Prior art keywords
- pump
- speed
- control
- programmable controller
- isothermal forging
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
-
- 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
- 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)
- Forging (AREA)
Abstract
The invention discloses a kind of process control system of isothermal forging hydropress and control method, it is characterised in that：At least include：Displacement transducer for gathering slide position data；Pump discharge electromagnet for opening and closing pump discharge；Constant displacement pump, the constant displacement pump is used to be supplied to the constant fluid of oil cylinder, and then causes slide block movement；Proportioning pump is used to be supplied to the adjustable controllable fluid of oil cylinder, and then causes slide block movement；Proportional servo valve is located at the branch road front end of proportioning pump one, for being supplied to the adjustable controllable fluid of oil cylinder, and then causes slide block movement；Programmable controller is used to read slide position data and calculates sliding block real-time speed, controls the uninterrupted of export ratio pump and control the uninterrupted of proportional servo valve.The present invention exports the ratio pump discharge or proportional servo valve flow of real-time change to reach that the constant speedpump required in isothermal forging hydropress, constant strain and allergic effect become the purpose of technology controlling and process according to programmable controller.
Description
Technical field
The present invention relates to isothermal forging hydropress technical field, the technique control of more particularly to a kind of isothermal forging hydropress
System and control method processed.
Background technology
With developing rapidly for hydraulic press technology, the production of isothermal forging hydropress have a wide range of applications with before market
Scape, traditional isothermal forging hydropress intelligentized control method is not high, with digitizing technique development and automatic technology it is wide
General application, the method for the increasing introducing Automated condtrol of isothermal forging hydropress, to better meet the market demand, if
A set of reliable and stable process control method is counted to be particularly important.
The content of the invention
The technical problem to be solved in the present invention is：The process control system and controlling party of a kind of isothermal forging hydropress are provided
Method.The present invention exports the ratio pump discharge or proportional servo valve flow of real-time change to reach isothermal according to programmable controller
The constant speedpump, constant strain and the allergic effect that are required in hydraulic forging press become the purpose of technology controlling and process.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of process control system of isothermal forging hydropress, at least includes：
Displacement transducer for gathering slide position data；
Pump discharge electromagnet for opening and closing pump discharge；
Constant displacement pump, the constant displacement pump is used to be supplied to the constant fluid of oil cylinder, and then causes slide block movement；
Proportioning pump, the proportioning pump is used to be supplied to the adjustable controllable fluid of oil cylinder, and then causes slide block movement；
Proportional servo valve, the proportional servo valve is located at the branch road front end of proportioning pump one, for being supplied to oil cylinder adjustable controllable
Fluid, and then cause slide block movement；
Programmable controller, the programmable controller be used for read slide position data and calculate sliding block real-time speed,
Control the uninterrupted of export ratio pump and the uninterrupted of control proportional servo valve；
Wherein：Input port and the displacement transducer electrical connection of programmable controller, the output port of programmable controller
Electrically connected with quantitative pump discharge electromagnet terminal, the output port of programmable controller and the flow control circuit of proportioning pump are electrically connected
Connect, the output port of programmable controller is electrically connected with proportional servo valve terminal.
A kind of control method of the process control system of isothermal forging hydropress, at least comprises the following steps：
Step 1: the first stage pressing position-process speed relation, Yong Hushe provided according to the process chart of product
Put the neutralizing target speed v0 of first stage forging；
Step 2: completing first stage pressing process according to slide position-process speed relation；
Step 3: the second stage pressing position-process speed or strain stress relation that are provided according to the process chart of product,
User sets n time of the second stage neutralizing target speed forged, i.e., according to method for control speed draw target shift speed degree v10 or
Target shift speed degree v20 is drawn according to strain control method；
Step 4: programmable controller is according to target velocity v10 or target shift speed degree v20, admission velocity controls the stage, when
When target shift speed degree v10 or target shift speed degree v20 is more than or equal to critical speed v30, using the direct proportioning pump output of pid algorithm
Method, when target shift speed degree v10 or target shift speed degree v20 is less than critical speed v30, adoption rate pump output constant and PID
The method of algorithm control proportional servo valve output；
Step 5: sliding block completes second stage pressing process according to target shift speed degree v10 or target shift speed degree v20 speed.
Further：Pass through formula：V0=n1 × v1+n2 × v2；Sufficient amount of pump discharge electromagnet is opened to meet speed
Degree requirement, wherein, the single constant displacement pump unit interval provides flow Q, according to Q=v × S (flows=ram speed × cylinder body face
Product), the speed v1 that single constant displacement pump is provided, the constant displacement pump pump discharge electromagnet quantity of startup is n1, opens single variable pump and carries
The speed of confession is v2, and variable pump pump discharge electromagnet quantity is n2.
Further：The speed v1 that the constant displacement pump is provided is definite value, and the speed v2 that the variable pump is provided is programmable control
Device processed passes through the real-time change value after PID control.
Further：The constant displacement pump pump discharge electromagnet quantity n1 and variable pump pump discharge electromagnet quantity n2 of the startup be
Programmable controller is according to the real-time change value of position-process speed relation.
Further：According to described speed control, the sliding block is in 10~0.1mm/s steps or stepless adjustable.
Further：When second stage is method for control speed, then target velocity v10 divides to be changed according to workpiece height h
Section is set, when second stage is strain control method, strain-length velocity relation：V20=ε × h；Wherein：ε is strain rate, and h is
Workpiece height；Workpiece height h is gradually reduced with pressing process, and strain rate is with workpiece height h setting stepwises, i.e.,：Highly
It is ε 1, highly in h2-h3 is interval in the interval planted agent's variable Rates of h1-h2, strain rate is ε 2, the like, until height is in h
(n-1)-h (n) is interval interior, and strain rate is ε (n-1).
Further：The isothermal forging process speed adjustable range is 0.005~0.1mm/s.
The present invention has the advantages and positive effects of：
First, the present invention pass through employ constant displacement pump and variable pump Collaborative Control realize stamp forging hydraulic press speed change compacting
The stepless speed regulation of technique；2nd, by the present invention in that reaching the method that High-speed Control and proportional servo valve low speed are controlled with proportioning pump,
Improve the precision of process speed；3rd, proportioning pump and proportional servo valve use closed loop control algorithm, can go out in pressing process
Existing tonnage keeps speed controllable in the case of continuing to increase, and improves stability and robustness when system resists disturbance.
Brief description of the drawings
Fig. 1 is the structured flowchart of the preferred embodiment of the present invention；
Wherein：1st, displacement transducer；2nd, programmable controller；3rd, pump discharge electromagnet；4th, proportional servo valve；5th, proportioning pump
Flow control circuit.
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and coordinate accompanying drawing
Describe in detail as follows：
Referring to Fig. 1, a kind of process control system of isothermal forging hydropress, including：
Displacement transducer 1, for gathering slide position data；
Pump discharge electromagnet 3, for opening and closing pump discharge；
Constant displacement pump, the fluid for being supplied to oil cylinder constant makes slide block movement；
Proportioning pump, for being supplied to the adjustable controllable fluid of oil cylinder to make slide block movement；
Proportional servo valve 4, positioned at the branch road front end of proportioning pump one, for being supplied to the adjustable controllable fluid of oil cylinder to transport sliding block
It is dynamic；
Programmable controller 2, for reading slide position data and calculating sliding block real-time speed, control export ratio pump
The uninterrupted of uninterrupted and control proportional servo valve.The control realization pair of circuit 5 of the passing ratio pump discharge of programmable controller 2
The control of ratio pump discharge；
Wherein：Input port and the displacement transducer electrical connection of programmable controller, the output port of programmable controller
Electrically connected with quantitative pump discharge electromagnet terminal, the output port of programmable controller and the flow control circuit of proportioning pump are electrically connected
Connect, the output port of programmable controller is electrically connected with proportional servo valve terminal.
A kind of control method of the process control system of isothermal forging hydropress, comprises the following steps:
Step 1: the first stage pressing position-process speed relation, Yong Hushe provided according to the process chart of product
Put the neutralizing target speed v0 of first stage forging；
Step 2: sliding block completes first stage pressing process according to position-process speed relation；
Step 3: the second stage pressing position-process speed or strain stress relation that are provided according to the process chart of product,
(user draws target shift speed degree v10 to the neutralizing target speed of n forging of user's setting second stage according to method for control speed
Or target shift speed degree v20 is drawn according to strain control method；
Step 4: programmable controller, the admission velocity control stage, actual to ensure according to target velocity v10 or v20
Speed matches with target velocity, using two kinds of control strategies：When v10 or v20 is more than or equal to critical speed v30, using PID
The method of the direct proportioning pump output of algorithm, when v10 or v20 is less than v30, adoption rate pump output constant and pid algorithm control
The method of proportional servo valve output；
Step 5: sliding block completes second stage pressing process according to v10 or v20 speed.
Further, described in the process control method first stage pressing process of isothermal forging hydropress, by v0=n1 ×
V1+n2 × v2 opens sufficient amount of pump discharge electromagnet to meet rate request, wherein, the single constant displacement pump unit interval provides
Flow Q, according to Q=v × S (flow=ram speed × cylinder body area), speed v1 that single constant displacement pump is provided, startup is quantified
Pump pump discharge electromagnet quantity is n1, and the speed for opening single variable pump offer is v2, and variable pump pump discharge electromagnet quantity is
n2.Described in the process control method first stage pressing process of isothermal forging hydropress, the speed v1 that constant displacement pump is provided is definite value,
The speed v2 that the variable pump is provided passes through the real-time change value after PID control for programmable controller.Described startup is determined
It is that programmable controller is fast according to position-technique to measure pump pump discharge electromagnet quantity n1 and variable pump pump discharge electromagnet quantity n2
The real-time change value of degree relation.Described first stage speed control can realize sliding block 10~0.1mm/s steps or it is stepless can
Adjust.The process control method second stage pressing process of isothermal forging hydropress, if second stage is method for control speed,
Target velocity v10 is subsection setup according to height h changes, if second stage is strain control method, strain-speed is closed
System：V20=ε × h (speed=strain rate × workpiece height), wherein workpiece height are gradually reduced with pressing process, strain
Speed can be with workpiece height h setting stepwises, i.e.,：Height is in ε 1, height h2-h3 interval in the interval planted agent's variable Rates of h1-h2
Strain rate is ε 2 until the interval planted agent's variable Rates of height h (n-1)-h (n) are ε (n-1).Strain rate can realize perseverance when constant
Strain controlling, can realize change strain controlling when strain rate changes with workpiece height.Described isothermal forging process speed regulation two
Stage compacting adjustable range is 0.005~0.1mm/s.
Embodiments of the invention are described in detail above, but the content is only presently preferred embodiments of the present invention,
It is not to be regarded as the practical range for limiting the present invention.Any changes and modifications in accordance with the scope of the present application,
Within the patent covering scope that the present invention all should still be belonged to.
Claims (8)
1. a kind of process control system of isothermal forging hydropress, it is characterised in that：At least include：
Displacement transducer for gathering slide position data；
Pump discharge electromagnet for opening and closing pump discharge；
Constant displacement pump, the constant displacement pump is used to be supplied to the constant fluid of oil cylinder, and then causes slide block movement；
Proportioning pump, the proportioning pump is used to be supplied to the adjustable controllable fluid of oil cylinder, and then causes slide block movement；
Proportional servo valve, the proportional servo valve is located at the branch road front end of proportioning pump one, for being supplied to the adjustable controllable oil of oil cylinder
Liquid, and then cause slide block movement；
Programmable controller, the programmable controller is used to read slide position data and calculates sliding block real-time speed, control
The uninterrupted of export ratio pump and the uninterrupted of control proportional servo valve；
Wherein：Input port and the displacement transducer electrical connection of programmable controller, the output port of programmable controller is with determining
The electrical connection of pump discharge electromagnet terminal is measured, the output port of programmable controller is electrically connected with the flow control circuit of proportioning pump,
The output port of programmable controller is electrically connected with proportional servo valve terminal.
2. a kind of control method of the process control system of isothermal forging hydropress according to claim 1, its feature exists
In：At least comprise the following steps：
Step 1: the first stage pressing position-process speed relation provided according to the process chart of product, user sets the
The neutralizing target speed v0 of one stage forging；
Step 2: completing first stage pressing process according to slide position-process speed relation；
Step 3: the second stage pressing position-process speed or strain stress relation that are provided according to the process chart of product, user
Neutralizing target speed n time of second stage forged is set, i.e., according to method for control speed draw target shift speed degree v10 or according to
Strain control method draws target shift speed degree v20；
Step 4: programmable controller in the admission velocity control stage, works as target according to target velocity v10 or target shift speed degree v20
When becoming speed v10 or target shift speed degree v20 more than or equal to critical speed v30, using the side of the direct proportioning pump output of pid algorithm
Method, when target shift speed degree v10 or target shift speed degree v20 is less than critical speed v30, adoption rate pump output constant and PID are calculated
The method of method control proportional servo valve output；
Step 5: sliding block completes second stage pressing process according to target shift speed degree v10 or target shift speed degree v20 speed.
3. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：It is logical
Cross formula：V0=n1 × v1+n2 × v2；Sufficient amount of pump discharge electromagnet is opened to meet rate request, wherein, it is single fixed
Infusion pump unit time offer flow Q, according to Q=v × S (flow=ram speed × cylinder body area), what single constant displacement pump was provided are provided
Speed v1, the constant displacement pump pump discharge electromagnet quantity of startup is n1, and the speed for opening single variable pump offer is v2, variable pump pump
It is n2 to export electromagnet quantity.
4. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：Institute
The speed v1 for stating constant displacement pump offer is definite value, the speed v2 that the variable pump is provided for programmable controller by PID control after
Real-time change value.
5. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：
The constant displacement pump pump discharge electromagnet quantity n1 and variable pump pump discharge electromagnet quantity n2 of the startup are PLC technology
Device is according to the real-time change value of position-process speed relation.
6. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：
According to described speed control, the sliding block is in 10~0.1mm/s steps or stepless adjustable.
7. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：When
Second stage is method for control speed, then target velocity v10 is subsection setup according to workpiece height h changes, works as second stage
For strain control method, strain-length velocity relation：V20=ε × h；Wherein：ε is strain rate, and h is workpiece height；Workpiece height h
As pressing process is gradually reduced, strain rate is with workpiece height h setting stepwises, i.e.,：Height is in the interval planted agent's speed changes of h1-h2
Rate is ε 1, highly in h2-h3 is interval, and strain rate is ε 2, the like, should until height is in h (n-1)-h (n) is interval
Variable Rate is ε (n-1).
8. the control method of the process control system of isothermal forging hydropress according to claim 2, it is characterised in that：Institute
Isothermal forging process speed adjustable range is stated for 0.005~0.1mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710283274.XA CN107120328A (en) | 2017-04-26 | 2017-04-26 | The process control system and control method of isothermal forging hydropress |
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| CN201710283274.XA CN107120328A (en) | 2017-04-26 | 2017-04-26 | The process control system and control method of isothermal forging hydropress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126342A (en) * | 2019-05-17 | 2019-08-16 | 天津市天锻压力机有限公司 | The process control system and control method of semicontinuous electrode hydraulic press |
| CN110259769A (en) * | 2019-05-27 | 2019-09-20 | 天津市天锻压力机有限公司 | The electrohydraulic control system and forming technology of 3000T liquid-state die forging hydraulic press |
| CN113898623A (en) * | 2021-09-17 | 2022-01-07 | 天津市天锻压力机有限公司 | Hydraulic system, control system and control method of multifunctional forging hydraulic press |
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| CN113898623B (en) * | 2021-09-17 | 2024-04-12 | 天津市天锻压力机有限公司 | Hydraulic system, control system and control method of multifunctional hydraulic forging press |
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Application publication date: 20170901 |