CN110259769A - The electrohydraulic control system and forming technology of 3000T liquid-state die forging hydraulic press - Google Patents
The electrohydraulic control system and forming technology of 3000T liquid-state die forging hydraulic press Download PDFInfo
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- CN110259769A CN110259769A CN201910446306.2A CN201910446306A CN110259769A CN 110259769 A CN110259769 A CN 110259769A CN 201910446306 A CN201910446306 A CN 201910446306A CN 110259769 A CN110259769 A CN 110259769A
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- pressure
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- speed
- sliding block
- hydraulic press
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Classifications
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
-
- 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
- F15B21/08—Servomotor systems incorporating electrically operated control means
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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)
- Control Of Presses (AREA)
- Forging (AREA)
Abstract
The invention discloses the electrohydraulic control systems and forming technology of a kind of 3000T liquid-state die forging hydraulic press, belong to liquid metal forming technique field, it is characterised in that: the electrohydraulic control system of above-mentioned 3000T liquid-state die forging hydraulic press includes at least :=for detecting the displacement sensor of slide position information；For detecting the pressure sensor of master cylinder upper cavity pressure information；And the PLC being electrically connected with upper displacement sensors and pressure sensor.The present invention is by the Electro-hydraulic Control System Design to liquid-state die forging hydraulic press, and the method for realizing liquid aluminium liquid Quick-forming using pid algorithm as core element by 1500 series of PLC of Siemens.Simultaneously compared to the valve draining forging press of Korean traditional, it can realize that downstream rate is adjustable and speed transition is steady using the proportional cartridge valve of atos, productive temp can be improved, also improve production efficiency.
Description
Technical field
The invention belongs to liquid metal forming technique field, a kind of 3000T liquid-state die forging hydraulic press is especially related to
Electrohydraulic control system and forming technology.
Background technique
In recent years, with the fast development of science and technology, orthodox car and new-energy automobile have obtained swift and violent growth, with
The continuous improvement of human living standard, market are increasing to the demand of automobile, push development of automobile industry imperative.With
The increasingly development of automobile industry, it is also increasing to the demand of this lightweight wheel of aluminium alloy, therefore, design production aluminium vehicle
The electrohydraulic control system and forming technology of effective 3000T liquid-state die forging hydraulic press of wheel are particularly important.
Summary of the invention
The present invention is directed to the above-mentioned technical problems in the prior art, provides a kind of 3000T liquid-state die forging hydraulic press
Electrohydraulic control system and forming technology, the present invention passed through by the Electro-hydraulic Control System Design to liquid-state die forging hydraulic press
The method that 1500 series of PLC of Siemens realizes liquid aluminium liquid Quick-forming using pid algorithm as core element.While compared to
The valve draining forging press of Korean traditional can realize that downstream rate is adjustable and speed transition is flat using the proportional cartridge valve of atos
Surely, productive temp can be improved, production efficiency is also improved.
The technical scheme adopted by the present invention to solve the technical problems existing in the known art is that
First invention purpose of the invention is to provide a kind of electrohydraulic control system of 3000T liquid-state die forging hydraulic press, at least
Include:
For detecting the displacement sensor of slide position information；
For detecting the pressure sensor of master cylinder upper cavity pressure information；
And the PLC being electrically connected with above-mentioned PID controller, displacement sensor and pressure sensor.
Second goal of the invention of the invention is to provide a kind of forming of the electrohydraulic control system of 3000T liquid-state die forging hydraulic press
Technique includes at least following steps:
Step 1: the sliding block fast downlink stage controls the backhaul of side cylinder by PLC by sliding block self gravity as power
The size of the atos proportioning valve opening of chamber side changes the speed of side cylinder backhaul chamber oil extraction, and atos proportioning valve is open bigger, backhaul
Chamber oil extraction speed is faster, and slide block down speed is just faster；
Step 2: sliding block work, into descending phase, upper mold has been approached liquid aluminium liquid position, it is about to molten aluminum down at this time full of entire
Die cavity reduces the speed of slide block down to 6-9mm/s；During this, cunning is adjusted by changing the opening of atos proportioning valve
The speed of block downlink, at the same time, main pump group is to master cylinder fuel feeding；
Step 3: sliding block suppresses descending phase, velocity-stabilization is needed and within the scope of 0-5mm/s；Atos proportioning valve is closed,
At this moment the counterbalance valve of side cylinder backhaul chamber side can form back pressure in backhaul chamber and hold sliding block, make sliding block under self gravity state not
Under slip；The speed of above-mentioned sliding block is only provided by main pump group, for speed control, changes proportioning pump oil extraction by speed closed loop algorithm
Amount achievees the purpose that stabilized speed；
Step 4: the downlink pressure period, is directed to 6061 series materials, the reaction of aluminum alloy materials internal strain is considered,
When suppressing liquid aluminium liquid, slow pressurization is needed before 1000T, needs Quick-pressing to 2500T after 1000T, in slow pressurization process
In, under the premise of meeting the maximum power of system oil hydraulic compression amount and ratio constant output pump, reduce the oil drain quantity of proportioning pump, phase
To the rate of rise for reducing pressure, to realize slow pressurization；During Quick-pressing, the oil drain quantity of ratio constant output pump is increased,
At this moment the rate of rise for improving system pressure, but will consider the problems of the pressure variations point of ratio constant output pump, when reaching proportioning pump
Invariable power when, flow and the inversely proportional relationship of pressure, flow can relatively reduce while pressure increases；In pressure close to mesh
When marking pressure, using be cut into it is single pump small flow and continue to pressurize, guarantee the overshoot of pressure in the reasonable scope, and maintain pressure steady
It is fixed；
Step 5: holding the pressure stage, continue to pressurize with the small flow of single proportioning pump, for guarantee hold pressure during pressure it is steady
It is fixed, the open amount of proportional pressure control valve need to be changed by pressure closed loop algorithm.
The advantages and positive effects of the present invention are:
By using above-mentioned technical proposal, the present invention by the Electro-hydraulic Control System Design to liquid-state die forging hydraulic press, and
The method that liquid aluminium liquid Quick-forming is realized using pid algorithm as core element by 1500 series of PLC of Siemens.Same phase
Than in the valve draining forging press of Korean traditional, it can realize that downstream rate is adjustable and speed transition using the proportional cartridge valve of atos
Steadily, productive temp can be improved, production efficiency is also improved；In the present invention, the use of atos proportional cartridge valve, both can be with
It realizes fast downlink, and is able to achieve that speed is adjustable and speed transition smoothly mentions a little；Accumulation of energy is used compared to Korean traditional
The method that device realizes Quick-pressing, it is controllable that the control method in step 4 may be implemented rate of pressure rise, in contrast, both improved
The performance of equipment also improves the efficiency of production to a certain extent；The many of other equipment in liquid wheel hub swage line
Movement can be with hydraulic press concurrent activity, the space that do not compressed.For the valve control system of Korean traditional, pass through contracting
It time, the pressing time of short sliding block fast downlink, can increase the productive temp of liquid forging, equipment can be extended at the same time and stopped
The machine time increases the equipment maintenance time, extends service life of equipment.
Detailed description of the invention:
Fig. 1 is liquid-state die forging hydraulic press third pressing stage process forming control method figure；
Fig. 2 is the 5th pressing stage process forming control method figure of liquid-state die forging hydraulic press.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Fig. 1 and Fig. 2 are please referred to,
The invention discloses a kind of electrohydraulic control systems of 3000T liquid-state die forging hydraulic press, comprising:
For detecting the displacement sensor of slide position information；
For detecting the pressure sensor of master cylinder upper cavity pressure information；
And the PLC being electrically connected with above-mentioned PID controller, displacement sensor and pressure sensor.
A kind of forming technology of the electrohydraulic control system of 3000T liquid-state die forging hydraulic press, includes the following steps:
Step 1 is the sliding block fast downlink stage.This stage can pass through at this time by sliding block self gravity as power
PLC controls the size of the atos proportioning valve opening of side cylinder backhaul chamber side to change speed (the atos ratio of side cylinder backhaul chamber oil extraction
Valve opening is bigger, and backhaul chamber oil extraction speed is faster, and slide block down speed is just faster), this stage needs fast downlink so as to upper
Mould fast approaching molten aluminum.
Step 2 is sliding block work into descending phase.In this stage, upper mold has been approached liquid aluminium liquid position, and downlink needs at this time
Molten aluminum is full of entire die cavity, need to guarantee that speed cannot be too fast, prevent molten aluminum from splashing out, the speed of slide block down need to be reduced to 6-
9mm/s or so.During this, the speed of slide block down is still adjusted by changing the opening of atos proportioning valve, it is same with this
When, need main pump group to master cylinder fuel feeding, it is therefore an objective to prevent work into down conversion for compacting downlink during oil liquid supply deficiency go out
Existing break.
Step 3 is that sliding block suppresses descending phase.This stage needs velocity-stabilization and adjustable within the scope of 0-5mm/s.This
Just it needs to close atos proportioning valve, at this moment the counterbalance valve of side cylinder backhaul chamber side, which can form back pressure in backhaul chamber, makes it to hold sliding block
It is not slipped or not under self gravity state.This purpose is to realize that the speed of sliding block is only provided by main pump group, to carry out to speed
It is accurately controlled.For speed control, since speed can decay because of the compression of oil liquid during slide block down, under reducing
Velocity attenuation during row need to change proportioning pump oil drain quantity by speed closed loop algorithm and reach speed stable purpose.
Step 4 is the downlink pressure period.It is directed to 6061 series materials, it is contemplated that the reaction of aluminum alloy materials internal strain,
When suppressing liquid aluminium liquid, slow pressurization is needed before 1000T, needs Quick-pressing to 2500T after 1000T, using this technique
The institutional framework of product is more preferable.In view of the requirement of this technique, during slow pressurization, meeting system oil hydraulic compression amount and ratio
Under the premise of the maximum power of example constant output pump, reduce the oil drain quantity of proportioning pump, the opposite rate of rise for reducing pressure is slow to realize
Speed pressurization.During Quick-pressing, the oil drain quantity of ratio constant output pump is increased, improves the rate of rise of system pressure, but at this moment
Consider the problems of the pressure variations point of ratio constant output pump, when reaching the invariable power of proportioning pump, flow is inversely proportional with pressure
Example relationship, flow can relatively reduce while pressure increases.When pressure is close to goal pressure, single small flow is pumped using being cut into
Continue to pressurize, guarantee the overshoot of pressure in the reasonable scope, and pressure is maintained to stablize.
Step 5 is to hold the pressure stage.This stage continues to pressurize with the small flow of single proportioning pump, to guarantee to hold pressure during pressure
The stabilization of power need to reach speed stable purpose by the open amount that pressure closed loop algorithm changes proportional pressure control valve.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It is not to be regarded as limiting practical range of the invention.It is all according to all the changes and improvements made by the present patent application range, should all be still
It falls within the scope of the patent of the present invention.
Claims (2)
1. a kind of electrohydraulic control system of 3000T liquid-state die forging hydraulic press, it is characterised in that: include at least:
For detecting the displacement sensor of slide position information；
For detecting the pressure sensor of master cylinder upper cavity pressure information；
And the PLC being electrically connected with upper displacement sensors and pressure sensor.
2. a kind of forming technology of the electrohydraulic control system according to claim 1 based on 3000T liquid-state die forging hydraulic press,
It is characterized in that: including at least following steps:
Step 1: the sliding block fast downlink stage controls side cylinder backhaul chamber side by PLC by sliding block self gravity as power
The size of atos proportioning valve opening change the speed of side cylinder backhaul chamber oil extraction, atos proportioning valve opening is bigger, backhaul chamber row
Speed oil is faster, and slide block down speed is just faster；
Step 2: sliding block work, into descending phase, upper mold has been approached liquid aluminium liquid position, it is about to molten aluminum down at this time full of entire mould
Chamber reduces the speed of slide block down to 6-9mm/s；During this, sliding block is adjusted by changing the opening of atos proportioning valve
The speed of downlink, at the same time, main pump group is to master cylinder fuel feeding；
Step 3: sliding block suppresses descending phase, velocity-stabilization is needed and within the scope of 0-5mm/s；Atos proportioning valve is closed, at this moment
The counterbalance valve of side cylinder backhaul chamber side can form back pressure in backhaul chamber and hold sliding block, make sliding block under self gravity state or not
It slips；The speed of above-mentioned sliding block is only provided by main pump group, for speed control, changes proportioning pump oil drain quantity by speed closed loop algorithm
Achieve the purpose that stabilized speed；
Step 4: the downlink pressure period, is directed to 6061 series materials, considers the reaction of aluminum alloy materials internal strain, suppressing
Slow pressurization is needed when liquid aluminium liquid, before 1000T, Quick-pressing is needed after 1000T to 2500T, during slow pressurization,
Under the premise of meeting system oil hydraulic compression amount and the maximum power of ratio constant output pump, reduce the oil drain quantity of proportioning pump, it is opposite to subtract
The rate of rise of small pressure, to realize slow pressurization；During Quick-pressing, the oil drain quantity of ratio constant output pump is increased, is improved
The rate of rise of system pressure, but at this moment to consider the problems of the pressure variations point of ratio constant output pump, when the perseverance for reaching proportioning pump
When power, flow and the inversely proportional relationship of pressure, flow can be relatively reduced while pressure increases；In pressure close to target pressure
When power, using be cut into it is single pump small flow and continue to pressurize, guarantee the overshoot of pressure in the reasonable scope, and pressure is maintained to stablize；
Step 5: holding the pressure stage, continue to pressurize with the small flow of single proportioning pump, the stabilization of pressure during pressure is held for guarantee, needs
Change the open amount of proportional pressure control valve by pressure closed loop algorithm.
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| CN201910446306.2A CN110259769B (en) | 2019-05-27 | 2019-05-27 | Electro-hydraulic control system of 3000T liquid die forging hydraulic press and forming process |
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| CN201910446306.2A CN110259769B (en) | 2019-05-27 | 2019-05-27 | Electro-hydraulic control system of 3000T liquid die forging hydraulic press and forming process |
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| CN110259769A true CN110259769A (en) | 2019-09-20 |
| CN110259769B CN110259769B (en) | 2020-09-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604451A (en) * | 2020-05-20 | 2020-09-01 | 天津天锻航空科技有限公司 | Control method and control system for hot forming process of high-precision forging hydraulic press |
| CN113351817A (en) * | 2021-04-30 | 2021-09-07 | 天津市天锻压力机有限公司 | Flexible control method of forging press |
| CN113953485A (en) * | 2021-09-17 | 2022-01-21 | 天津市天锻压力机有限公司 | Liquid die forging forming process method based on boost rate control |
| CN114769491A (en) * | 2022-04-29 | 2022-07-22 | 中国重型机械研究院股份公司 | Intelligent speed regulation control system and method for large die forging press |
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| CN114769491A (en) * | 2022-04-29 | 2022-07-22 | 中国重型机械研究院股份公司 | Intelligent speed regulation control system and method for large die forging press |
| CN114769491B (en) * | 2022-04-29 | 2024-06-04 | 中国重型机械研究院股份公司 | Intelligent speed regulation control system and method for large die forging press |
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